UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM N-CSR CERTIFIED SHAREHOLDER REPORT OF REGISTERED MANAGEMENT INVESTMENT COMPANIES 		Investment Company Act file number 811-21823 Pioneer Series Trust V (Exact name of registrant as specified in charter) 60 State Street, Boston, MA 02109 (Address of principal executive offices) (ZIP code) Terrence J. Cullen, Pioneer Investment Management, Inc., 60 State Street, Boston, MA 02109 (Name and address of agent for service) Registrant's telephone number, including area code: (617) 742-7825 Date of fiscal year end: August 31 Date of reporting period: September 1, 2016 through August 31, 2017 Form N-CSR is to be used by management investment companies to file reports with the Commission not later than 10 days after the transmission to stockholders of any report that is required to be transmitted to stockholders under Rule 30e-1 under the Investment Company Act of 1940 (17 CFR 270.30e-1). The Commission may use the information provided on Form N-CSR in its regulatory, disclosure review, inspection, and policymaking roles. A registrant is required to disclose the information specified by Form N-CSR, and the Commission will make this information public. A registrant is not required to respond to the collection of information contained in Form N-CSR unless the Form displays a currently valid Office of Management and Budget ("OMB") control number. Please direct comments concerning the accuracy of the information collection burden estimate and any suggestions for reducing the burden to Secretary, Securities and Exchange Commission, 450 Fifth Street, NW, Washington, DC 20549-0609. The OMB has reviewed this collection of information under the clearance requirements of 44 U.S.C. ss. 3507. ITEM 1. REPORTS TO STOCKHOLDERS. Pioneer Global Equity Fund -------------------------------------------------------------------------------- Annual Report | August 31, 2017 -------------------------------------------------------------------------------- Ticker Symbols: Class A GLOSX Class C GCSLX Class K PGEKX Class R PRGEX Class Y PGSYX [LOGO] Amundi Pioneer ============== ASSET MANAGEMENT visit us: www.amundipioneer.com Table of Contents President's Letter 2 Portfolio Management Discussion 4 Portfolio Summary 11 Prices and Distributions 12 Performance Update 13 Comparing Ongoing Fund Expenses 18 Schedule of Investments 20 Financial Statements 28 Notes to Financial Statements 37 Report of Independent Registered Public Accounting Firm 50 Additional Information 51 Approval of New and Interim Management Agreements 53 Trustees, Officers and Service Providers 61 Pioneer Global Equity Fund | Annual Report | 8/31/17 1 President's Letter We are very pleased to announce that on July 3, 2017, Amundi Asset Management, a large European asset manager, officially acquired Pioneer Investments and announced the completion of a merger which combined Pioneer Investment Management USA, Inc., in Boston and Amundi Smith Breeden in Durham, N.C., to form Amundi Pioneer Asset Management, Inc. ("Amundi Pioneer"). Amundi Smith Breeden, founded as Smith Breeden Associates in 1982, is a highly regarded relative-value credit investor managing an extensive range of fixed-income strategies tailored to the needs of institutional investors. Our new brand, Amundi Pioneer, now signifies: o Ownership by Amundi Asset Management ("Amundi"). Amundi is Europe's largest asset manager and among the world's top 10 asset managers, as measured by assets under management (AUM), with approximately $1.3 trillion AUM(1). o The significantly larger scale and resources of the combined firms. o Amundi's desire to maintain the strong brand recognition of Pioneer in the U.S., which dates back to 1928. We would like to stress to shareowners that all of the Pioneer mutual funds have retained their previous names. In addition, there have been no changes to the portfolio managers or the funds' investment strategies as a result of the merger. Amundi Pioneer's newly combined investment team works together as one unit, discussing investment ideas, participating in research meetings, and collaborating across the expanded organization. We are looking forward to the opportunity to leverage the broad global resources of Amundi. In bringing together Pioneer and Amundi Smith Breeden, we have combined organizations that share similar investment philosophies and corporate cultures, and that value teamwork across a collegial, collaborative environment. We are very excited about our future, as we believe the greater scale and expanded global reach of the combined firm, with some 5,000 employees worldwide, provides several opportunities to better meet the needs of today's investors by exploring new, innovative investment solutions and integrating the abundance of thought leadership resources at Amundi, while also maintaining our commitment to providing existing shareowners with outstanding service locally. (1) Source: IPE "Top 400 asset managers" published in June 2017 and based on AUM as of end December 2016. 2 Pioneer Global Equity Fund | Annual Report | 8/31/17 As always, and particularly during times of market uncertainty, we encourage you to work with your financial advisor to develop an overall investment plan that addresses both your short- and long-term goals, and to implement such a plan in a disciplined manner. We greatly appreciate the trust you have placed in us and look forward to continuing to serve you in the future as we move into a new and exciting era. Sincerely, /s/ Lisa M. Jones Lisa M. Jones Head of the Americas, President and CEO of U.S. Amundi Pioneer Asset Management USA, Inc. August 31, 2017 Any information in this shareowner report regarding market or economic trends or the factors influencing the Fund's historical or future performance are statements of opinion as of the date of this report. Past performance is no guarantee of future results. Pioneer Global Equity Fund | Annual Report | 8/31/17 3 Portfolio Management Discussion | 8/31/17 Important Note: On July 3, 2017, Amundi acquired Pioneer Investments, a group of asset management companies located throughout the world. Amundi, one of the world's largest asset managers, is headquartered in Paris, France. As a result of the transaction, Pioneer Investment Management, Inc., the Fund's investment adviser, became an indirect wholly owned subsidiary of Amundi and Amundi's wholly owned subsidiary, Amundi USA, Inc. Prior to July 3, 2017, Pioneer Investments was owned by Pioneer Global Asset Management S.p.A., a wholly owned subsidiary of UniCredit S.p.A. In connection with the transaction, the names of the Fund's investment adviser and principal underwriter changed. Effective July 3, 2017, the name of Pioneer Investment Management, Inc. changed to Amundi Pioneer Asset Management, Inc. and the name of Pioneer Funds Distributor, Inc. changed to Amundi Pioneer Distributor, Inc. This transaction does not impact your existing relationship with Pioneer Investments, your advisor, or the methods you use to communicate with us, as the investor contact telephone numbers and services you expect will remain the same. We are excited, however, to be launching a new website representing the combined company. Come visit us at: www.amundipioneer.com. In the following interview, portfolio managers Marco Pirondini and David Glazer discuss the factors that influenced the performance of Pioneer Global Equity Fund during the 12-month period ended August 31, 2017. Mr. Pirondini, Head of Equities, U.S., Executive Vice President and a portfolio manager at Amundi Pioneer Asset Management, Inc. (Amundi Pioneer), and Mr. Glazer, Senior Vice President and a portfolio manager at Amundi Pioneer, are responsible for the day-to-day management of the Fund. Q How did the Fund perform over the 12-month period ended August 31, 2017? A Pioneer Global Equity Fund's Class A shares returned 18.89% at net asset value during the 12-month period ended August 31, 2017, while the Fund's benchmarks, the Morgan Stanley Capital International (MSCI) 4 Pioneer Global Equity Fund | Annual Report | 8/31/17 World ND Index and the MSCI All Country World ND Index1, returned 16.19% and 17.11%, respectively. During the same period, the average return of the 200 mutual funds in Lipper's Global Multi-Cap Core Funds category was 16.46%, and the average return of the 857 mutual funds in Morningstar's World Large Stock Funds category was 16.00%. Q How would you characterize the investment environment in the global equity markets during the 12-month period ended August 31, 2017? A The past 12 months represented a very strong period for global equities as we saw a significant reflationary trend in the global economy, with improving macroeconomic conditions for international markets. Amid a positive investment environment, the emerging markets, Japan, and Europe all registered economic and market gains. And, with the help of continuing monetary support from the world's central banks, including quantitative easing policies, global economic growth gained some additional momentum. Cyclical sectors such as financials, consumer discretionary, consumer staples, industrials, and information technology enjoyed particularly strong performance over the 12 months. In contrast, utilities, telecommunications, and real estate trailed equity market averages. Though 12-month returns were favorable, the markets did endure periods of heightened volatility. When the Fund's reporting period began in September 2016, global markets had bounced back strongly in the months following the United Kingdom's "Brexit" vote to leave the European Union (E.U.). However, an economic slowdown in Japan and uncertainty surrounding the U.S. presidential election weighed on the markets as investors grappled with the potential effects those events might have on global growth. However, with central banks committed to policies aimed at offsetting any fallout from Brexit, and amid signs that the U.S. economy was gathering renewed strength, market sentiment steadily improved. (1) The MSCI information may only be used for your internal use, may not be reproduced or redisseminated in any form and may not be used as a basis for or a component of any financial instruments or products or indices. None of the MSCI information is intended to constitute investment advice or a recommendation to make (or refrain from making) any kind of investment decision and may not be relied on as such. Historical data and analysis should not be taken as an indication or guarantee of any future performance analysis, forecast or prediction. The MSCI information is provided on an "as is" basis and the user of this information assumes the entire risk of any use made of this information. MSCI, each of its affiliates and each other person involved in or related to compiling, computing or creating any MSCI information (collectively, the "MSCI Parties") expressly disclaims all warranties (including, without limitation, any warranties of originality, accuracy, completeness, timeliness, non-infringement, merchantability and fitness for a particular purpose) with respect to this information. Without limiting any of the foregoing, in no event shall any MSCI Party have any liability for any direct, indirect, special, incidental, punitive, consequential (including, without limitation, lost profits) or any other damages. Pioneer Global Equity Fund | Annual Report | 8/31/17 5 The election of Donald Trump as U.S. president in November, coupled with speculation that tax reform, infrastructure spending, and deregulation would be important features of his presidency, spurred renewed optimism and propelled major U.S. stock market indices to all-time highs. After the initial euphoria subsided - amid the failure of several political initiatives in Washington, including attempts to repeal/replace the Affordable Care Act - some investors rotated out of U.S. cyclical issues and focused on international stocks. In Europe, markets were rattled by concerns regarding the future of the E.U. in the lead-up to several national elections. Concern then turned to optimism, though, in light of a series of election results that reinforced the strength of the E.U., especially the emphatic victory in France by Emmanuel Macron and his `La Republique en Marche' party. In that environment, global stocks delivered strong performance during the full 12-month period. U.S. equities, as measured by the Standard & Poor's 500 Index, returned 16.22%, while international equities returned 19.43%, as measured by the MSCI All Country World (ex-U.S.) Index, and European stocks, as measured by the MSCI Europe Index, returned 20.12%. Q Would you review the Fund's overall investment approach? A When picking investments for the portfolio, we examine mid- and large- capitalization stocks worldwide, including those located in the emerging markets. From there, we build a diversified* portfolio. We look for stocks that we think can provide "growth at a reasonable price," and so there is a strong value component to our analysis. We seek to invest the Fund in companies that are not only benefiting from operating efficiencies as reflected in factors such as increased market share and revenues, but that are also employing their capital efficiently. In particular, we emphasize strong free cash flow, because that provides companies with the flexibility to make share buybacks, reinvest in their businesses, make acquisitions, and raise dividends**. We also look for stocks with attractive dividend yields as well as those trading at below-market valuations. Finally, we attempt to assess not only the potential price gains for each stock, but also the potential for a decline in price if circumstances become unfavorable. We prefer stocks with the highest potential upside relative to their downside. * Diversification does not assure a profit nor protect against loss. ** Dividends are not guaranteed. 6 Pioneer Global Equity Fund | Annual Report | 8/31/17 Q Which of your investment decisions or individual portfolio holdings either aided or detracted from the Fund's performance relative to its benchmarks during the 12-month period ended August 31, 2017? A During the period, security selection and sector allocation made almost equally strong contributions to the Fund's benchmark-relative performance. In terms of security selection, notable contributions came from positions in defensive-oriented technology stocks, including Apple, Samsung, and Microsoft. In addition, portfolio positions in financial issues aided benchmark-relative returns, including holdings in PNC Financial Services, JPMorgan Chase, BNP Paribas, and ING Groep. Mid-cap names within the consumer discretionary sector also made positive contributions to the Fund's performance, especially the apparel company Moncler, and Sekisui Chemical, from Japan. Detractors from the Fund's benchmark-relative performance included positions in several health care distribution companies, all of which were punished by investors following the inability of Congressional leaders to reshape U.S. health care policy. The Fund's underperformers in the sector included CVS, Cardinal Health, and Shire. We sold CVS and Cardinal Health from the portfolio, but have maintained the Fund's Shire position, as we favor the company's longer-term prospects. Within information technology, we sold the Fund's position in Fitbit after the company underperformed due to disappointing product innovation. Q Did you employ derivatives in managing the Fund during the 12-month period ended August 31, 2017, and did those investments have an effect on performance? A Over the 12-month period, we utilized derivative securities in the portfolio to a limited degree, mainly to help guard against negative currency effects. The Fund's derivative positions did not have a meaningful effect on performance. Q What is the Fund's positioning as of period-end, and your general outlook? A We remain upbeat regarding the Fund's positioning within information technology and financials, but we have recently taken some profits within both sectors while increasing exposure to health care. Following the latter sector's poor performance over the past 12 months, and in Pioneer Global Equity Fund | Annual Report | 8/31/17 7 light of the fact that changes to the Affordable Care Act may not occur any time soon, we think valuations of health care stocks should normalize and that investors will begin focusing more on the long-term merits of individual companies, given ongoing product innovations and an aging population that will require more health-related services. In addition, we have reduced the Fund's significant underweight to energy stocks, as a number of those companies appear attractively valued after the sector's recent slump. Looking at market valuations more generally, we believe that the stocks held in the Fund's portfolio are attractively valued. And, even though there are certainly a number of stocks in the market that are overpriced, we view many companies around the globe as having attractive near-term prospects and favorable valuations. We expect the global economic cycle to continue to be positive in the coming months. Monetary policies of global central banks remain expansionary, despite some signals that support will be reduced in the near future. Quantitative easing is still underway in Japan and Europe, and continues to support the markets. International markets that endured significant volatility over the past two years are now recovering, and we believe that the global economy remains in mid-cycle, with significant room for growth and expansion. We also think that this global economic growth cycle will be of a much longer duration than those we have seen in the recent past. Geopolitical risks certainly remain, including tensions with North Korea and within the Middle East. Assuming those situations remain stable, we look for consolidation of the European economic recovery, continuing improvements in the emerging markets, and a possible reacceleration of the U.S. economy given the massive distributions of aid and economic stimulus to areas of the country affected by the recent hurricane season. We look for U.S. inflation to increase somewhat, but not to a troubling level, despite the fact that the country is close to full employment. 8 Pioneer Global Equity Fund | Annual Report | 8/31/17 For those reasons, we look for a favorable global economic environment going forward, with manufacturing expanding and recoveries in major regions of the world occurring in synchronized fashion. We believe such trends should be very positive for global stocks. Please refer to the Schedule of Investments on pages 20-27 for a full listing of fund securities. All investments are subject to risk, including the possible loss of principal. In the past several years, financial markets have experienced increased volatility, depressed valuations, decreased liquidity and heightened uncertainty. These conditions may continue, recur, worsen or spread. Investing in foreign and/or emerging markets securities involves risks relating to interest rates, currency exchange rates, economic, and political conditions. The Fund is subject to currency risk, meaning that the Fund could experience losses based on changes in the exchange rate between non-U.S. currencies and the U.S. dollar. Investments in small- and mid-sized companies may offer the potential for higher returns, but are also subject to greater short-term price fluctuations than investments in larger, more established companies. When interest rates rise, the prices of fixed-income securities in the Fund will generally fall. Conversely, when interest rates fall, the prices of fixed-income securities in the Fund will generally rise. The Fund may use derivatives, such as options, futures, inverse floating rate obligations, swaps, and others, which can be illiquid, may disproportionately increase losses, and have a potentially large impact on Fund performance. Derivatives may have a leveraging effect on the Fund. Pioneer Global Equity Fund | Annual Report | 8/31/17 9 At times, the Fund's investments may represent industries or industry sectors that are interrelated or have common risks, making it more susceptible to any economic, political, or regulatory developments or other risks affecting those industries and sectors. These risks may increase share price volatility. Before investing, consider the product's investment objectives, risks, charges and expenses. Contact your advisor or Amundi Pioneer Asset Management, Inc., for a prospectus or summary prospectus containing this information. Read it carefully. Any information in this shareholder report regarding market or economic trends or the factors influencing the Fund's historical or future performance are statements of opinion as of the date of this report. Past performance is no guarantee of future results. 10 Pioneer Global Equity Fund | Annual Report | 8/31/17 Portfolio Summary | 8/31/17 Sector Distribution -------------------------------------------------------------------------------- (As a percentage of long-term holdings) [THE FOLLOWING DATA WAS REPRESENTED AS A PIE CHART IN THE PRINTED MATERIAL] Financials 28.9% Information Technology 24.4% Consumer Discretionary 13.1% Health Care 12.6% Industrials 7.1% Consumer Staples 4.4% Energy 4.3% Telecommunication Services 2.6% Materials 1.8% Real Estate 0.8% Geographical Distribution -------------------------------------------------------------------------------- (As a percentage of long-term holdings based on country of domicile) [THE FOLLOWING DATA WAS REPRESENTED AS A LINE CHART IN THE PRINTED MATERIAL] United States 52.0% France 12.8% Japan 10.8% United Kingdom 5.9% South Korea 3.6% Switzerland 3.3% Ireland 3.0% Germany 2.8% Indonesia 2.4% Italy 1.3% Taiwan 1.2% Other (individually less than 1%) 0.9% 10 Largest Holdings -------------------------------------------------------------------------------- (As a percentage of long-term holdings)* 1. Apple, Inc. 4.35% -------------------------------------------------------------------------------- 2. Samsung Electronics Co., Ltd. 3.58 -------------------------------------------------------------------------------- 3. TOTAL SA 3.51 -------------------------------------------------------------------------------- 4. Novartis AG 3.35 -------------------------------------------------------------------------------- 5. United Rentals, Inc. 3.24 -------------------------------------------------------------------------------- 6. BNP Paribas SA 3.21 -------------------------------------------------------------------------------- 7. Microsoft Corp. 3.01 -------------------------------------------------------------------------------- 8. JPMorgan Chase & Co. 2.91 -------------------------------------------------------------------------------- 9. Affiliated Managers Group, Inc. 2.77 -------------------------------------------------------------------------------- 10. Valeo SA 2.67 -------------------------------------------------------------------------------- * This list excludes temporary cash investments and derivative instruments. The portfolio is actively managed, and current holdings may be different. The holdings listed should not be considered recommendations to buy or sell any securities listed. Pioneer Global Equity Fund | Annual Report | 8/31/17 11 Prices and Distributions | 8/31/17 Net Asset Value per Share -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- Class 8/31/17 8/31/16 -------------------------------------------------------------------------------- A $15.77 $13.43 -------------------------------------------------------------------------------- C $15.42 $13.13 -------------------------------------------------------------------------------- K $15.81 $13.47 -------------------------------------------------------------------------------- R $15.65 $13.36 -------------------------------------------------------------------------------- Y $15.83 $13.50 -------------------------------------------------------------------------------- Distributions per Share: 9/1/16-8/31/17 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- Net Investment Short-Term Long-Term Class Income Capital Gains Capital Gains -------------------------------------------------------------------------------- A $0.1686 $ -- $ -- -------------------------------------------------------------------------------- C $0.0635 $ -- $ -- -------------------------------------------------------------------------------- K $0.2384 $ -- $ -- -------------------------------------------------------------------------------- R $0.1530 $ -- $ -- -------------------------------------------------------------------------------- Y $0.2534 $ -- $ -- -------------------------------------------------------------------------------- The Morgan Stanley Capital International (MSCI) World ND Index is an unmanaged measure of the performance of stock markets in the developed world. The MSCI All Country World ND Index is an unmanaged, free-float-adjusted, market-capitalization-weighted index that is designed to measure the equity market performance of developed and emerging markets. The Index consists of 45 country indices comprising 24 developed and 21 emerging market country indices. Index returns are calculated monthly, assume reinvestment of dividends and, unlike Fund returns, do not reflect any fees, expenses or sales charges. It is not possible to invest directly in an index. The index defined here pertains to the "Value of $10,000 Investment" and "Value of $5 Million Investment" charts on pages 13-17. 12 Pioneer Global Equity Fund | Annual Report | 8/31/17 Performance Update | 8/31/17 Class A Shares Investment Returns -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $10,000 investment made in Class A shares of Pioneer Global Equity Fund at public offering price during the periods shown, compared to that of the Morgan Stanley Capital International (MSCI) World ND Index and the MSCI All Country World ND Index. Average Annual Total Returns (As of August 31, 2017) -------------------------------------------------------------------------------- MSCI Net Public MSCI All Asset Offering World Country Value Price ND World Period (NAV) (POP) Index ND Index -------------------------------------------------------------------------------- 10 years 4.35% 3.73% 4.47% 4.23% 5 years 12.05 10.73 11.10 10.46 1 year 18.89 12.04 16.19 17.11 -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated April 1, 2017, as supplemented) -------------------------------------------------------------------------------- Gross Net -------------------------------------------------------------------------------- 1.45% 1.25% -------------------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $10,000 Investment Pioneer Global MSCI All Country Equity Fund MSCI World ND Index World ND Index 8/07 $ 9,425 $10,000 $10,000 8/08 $ 8,421 $ 8,793 $ 8,806 8/09 $ 7,087 $ 7,279 $ 7,359 8/10 $ 7,007 $ 7,392 $ 7,616 8/11 $ 7,742 $ 8,461 $ 8,661 8/12 $ 8,168 $ 9,148 $ 9,199 8/13 $ 9,733 $10,761 $10,623 8/14 $12,276 $13,031 $12,853 8/15 $11,677 $12,492 $12,045 8/16 $12,135 $13,327 $12,917 8/17 $14,426 $15,484 $15,128 Call 1-800-225-6292 or visit www.amundipioneer.com for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. NAV results represent the percent change in net asset value per share. Returns would have been lower had sales charges been reflected. POP returns reflect deduction of maximum 5.75% sales charge. All results are historical and assume the reinvestment of dividends and capital gains. Other share classes are available for which performance and expenses will differ. Performance results reflect any applicable expense waivers in effect during the periods shown. Without such waivers Fund performance would be lower. Waivers may not be in effect for all funds. Certain fee waivers are contractual through a specified period. Otherwise, fee waivers can be rescinded at any time. See the prospectus and financial statements for more information. The net expense ratio reflects the contractual expense limitation currently in effect through January 1, 2019, for Class A shares. There can be no assurance that Amundi Pioneer will extend the expense limitation beyond such time. Please see the prospectus and financial statements for more information. Please refer to the financial highlights for more recent expense ratios. The performance table and graph do not reflect the deduction of fees and taxes that a shareowner would pay on Fund distributions or the redemption of Fund shares. Pioneer Global Equity Fund | Annual Report | 8/31/17 13 Performance Update | 8/31/17 Class C Shares Investment Returns -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $10,000 investment made in Class C shares of Pioneer Global Equity Fund during the periods shown, compared to that of the Morgan Stanley Capital International (MSCI) World ND Index and the MSCI All Country World ND Index. Average Annual Total Returns (As of August 31, 2017) -------------------------------------------------------------------------------- MSCI MSCI All World Country If If ND World Period Held Redeemed Index ND Index -------------------------------------------------------------------------------- 10 years 3.46% 3.46% 4.47% 4.23% 5 years 11.16 11.16 11.10 10.46 1 year 18.00 18.00 16.19 17.11 -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated April 1, 2017, as supplemented) -------------------------------------------------------------------------------- Gross Net -------------------------------------------------------------------------------- 2.16% 2.15% -------------------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $10,000 Investment Pioneer Global MSCI All Country Equity Fund MSCI World ND Index World ND Index 8/07 $10,000 $10,000 $10,000 8/08 $ 8,853 $ 8,793 $ 8,806 8/09 $ 7,386 $ 7,279 $ 7,359 8/10 $ 7,238 $ 7,392 $ 7,616 8/11 $ 7,917 $ 8,461 $ 8,661 8/12 $ 8,278 $ 9,148 $ 9,199 8/13 $ 9,777 $10,761 $10,623 8/14 $12,220 $13,031 $12,853 8/15 $11,536 $12,492 $12,045 8/16 $11,908 $13,327 $12,917 8/17 $14,051 $15,484 $15,128 Call 1-800-225-6292 or visit www.amundipioneer.com for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. Class C shares held for less than one year are also subject to a 1% contingent deferred sales charge (CDSC). "If Held" results represent the percent change in net asset value per share. Returns would have been lower had sales charges been reflected. All results are historical and assume the reinvestment of dividends and capital gains. Other share classes are available for which performance and expenses will differ. Performance results reflect any applicable expense waivers in effect during the periods shown. Without such waivers Fund performance would be lower. Waivers may not be in effect for all funds. Certain fee waivers are contractual through a specified period. Otherwise, fee waivers can be rescinded at any time. See the prospectus and financial statements for more information. The net expense ratio reflects the contractual expense limitation currently in effect through January 1, 2019, for Class C shares. There can be no assurance that Amundi Pioneer will extend the expense limitation beyond such time. Please see the prospectus and financial statements for more information. Please refer to the financial highlights for more recent expense ratios. The performance table and graph do not reflect the deduction of fees and taxes that a shareowner would pay on Fund distributions or the redemption of Fund shares. 14 Pioneer Global Equity Fund | Annual Report | 8/31/17 Performance Update | 8/31/17 Class K Shares Investment Returns -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $5 million investment made in Class K shares of Pioneer Global Equity Fund during the periods shown, compared to that of the Morgan Stanley Capital International (MSCI) World ND Index and the MSCI All Country World ND Index. Average Annual Total Returns (As of August 31, 2017) -------------------------------------------------------------------------------- MSCI Net MSCI All Asset World Country Value ND World Period (NAV) Index ND Index -------------------------------------------------------------------------------- 10 years 4.48% 4.47% 4.23% 5 years 12.33 11.10 10.46 1 year 19.44 16.19 17.11 -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated April 1, 2017, as supplemented) -------------------------------------------------------------------------------- Gross Net -------------------------------------------------------------------------------- 0.92% 0.80% -------------------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $5 Million Investment Pioneer Global MSCI All Country Equity Fund MSCI World ND Index World ND Index 8/07 $5,000,000 $5,000,000 $5,000,000 8/08 $4,465,765 $4,396,502 $4,402,840 8/09 $3,758,666 $3,639,723 $3,679,585 8/10 $3,716,038 $3,695,926 $3,808,130 8/11 $4,105,584 $4,230,328 $4,330,428 8/12 $4,331,528 $4,573,805 $4,599,598 8/13 $5,161,830 $5,380,259 $5,311,429 8/14 $6,510,424 $6,515,261 $6,426,279 8/15 $6,206,733 $6,246,183 $6,022,300 8/16 $6,486,487 $6,663,652 $6,458,564 8/17 $7,747,463 $7,742,198 $7,563,777 Call 1-800-225-6292 or visit www.amundipioneer.com for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. The performance shown for Class K shares for the period prior to the commencement of operations of Class K shares on December 31, 2014, is the net asset value performance of the Fund's Class A shares, which has not been restated to reflect any differences in expenses, including Rule 12b-1 fees applicable to Class A shares. Since fees for Class A shares generally are higher than those of Class K shares, the performance of Class K shares prior to their inception would have been higher than the performance shown. For the period beginning December 31, 2014, the actual performance of Class K shares is reflected. Class K shares are not subject to sales charges and are available for limited groups of eligible investors, including institutional investors. All results are historical and assume the reinvestment of dividends and capital gains. Other share classes are available for which performance and expenses will differ. Performance results reflect any applicable expense waivers in effect during the periods shown. Without such waivers Fund performance would be lower. Waivers may not be in effect for all funds. Certain fee waivers are contractual through a specified period. Otherwise, fee waivers can be rescinded at any time. See the prospectus and financial statements for more information. The net expense ratio reflects the contractual expense limitation currently in effect through January 1, 2019, for Class K shares. There can be no assurance that Amundi Pioneer will extend the expense limitation beyond such time. Please see the prospectus and financial statements for more information. Please refer to the financial highlights for more recent expense ratios. The performance table and graph do not reflect the deduction of fees and taxes that a shareowner would pay on Fund distributions or the redemption of Fund shares. Pioneer Global Equity Fund | Annual Report | 8/31/17 15 Performance Update | 8/31/17 Class R Shares Investment Returns -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $10,000 investment made in Class R shares of Pioneer Global Equity Fund during the periods shown, compared to that of the Morgan Stanley Capital International (MSCI) World ND Index and the MSCI All Country World ND Index. Average Annual Total Returns (As of August 31, 2017) -------------------------------------------------------------------------------- MSCI Net MSCI All Asset World Country Value ND World Period (NAV) Index ND Index -------------------------------------------------------------------------------- 10 years 4.29% 4.47% 4.23% 5 years 11.94 11.10 10.46 1 year 18.47 16.19 17.11 -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated April 1, 2017, as supplemented) -------------------------------------------------------------------------------- Gross Net -------------------------------------------------------------------------------- 1.68% 1.55% -------------------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $10,000 Investment Pioneer Global MSCI All Country Equity Fund MSCI World ND Index World ND Index 8/07 $10,000 $10,000 $10,000 8/08 $ 8,932 $ 8,793 $ 8,806 8/09 $ 7,517 $ 7,279 $ 7,359 8/10 $ 7,432 $ 7,392 $ 7,616 8/11 $ 8,211 $ 8,461 $ 8,661 8/12 $ 8,663 $ 9,148 $ 9,199 8/13 $10,324 $10,761 $10,623 8/14 $13,021 $13,031 $12,853 8/15 $12,375 $12,492 $12,045 8/16 $12,852 $13,327 $12,917 8/17 $15,226 $15,484 $15,128 Call 1-800-225-6292 or visit www.amundipioneer.com for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. The performance shown for Class R shares for the period prior to the commencement of operations of Class R shares on July 1, 2015, is the net asset value performance of the Fund's Class A shares, which has not been restated to reflect any differences in expenses, including Rule 12b-1 fees applicable to Class A shares. Since fees for Class A shares generally are higher than those of Class R shares, the performance of Class R shares prior to their inception would have been higher than the performance shown. For the period beginning July 1, 2015, the actual performance of Class R shares is reflected. Class R shares are not subject to sales charges and are available for limited groups of eligible investors, including institutional investors. All results are historical and assume the reinvestment of dividends and capital gains. Other share classes are available for which performance and expenses will differ. Performance results reflect any applicable expense waivers in effect during the periods shown. Without such waivers Fund performance would be lower. Waivers may not be in effect for all funds. Certain fee waivers are contractual through a specified period. Otherwise, fee waivers can be rescinded at any time. See the prospectus and financial statements for more information. The net expense ratio reflects the contractual expense limitation currently in effect through January 1, 2019, for Class R shares. There can be no assurance that Amundi Pioneer will extend the expense limitation beyond such time. Please see the prospectus and financial statements for more information. Please refer to the financial highlights for more recent expense ratios. The performance table and graph do not reflect the deduction of fees and taxes that a shareowner would pay on Fund distributions or the redemption of Fund shares. 16 Pioneer Global Equity Fund | Annual Report | 8/31/17 Performance Update | 8/31/17 Class Y Shares Investment Returns -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $5 million investment made in Class Y shares of Pioneer Global Equity Fund during the periods shown, compared to that of the Morgan Stanley Capital International (MSCI) World ND Index and the MSCI All Country World ND Index. Average Annual Total Returns (As of August 31, 2017) -------------------------------------------------------------------------------- MSCI Net MSCI All Asset World Country Value ND World Period (NAV) Index ND Index -------------------------------------------------------------------------------- 10 years 4.79% 4.47% 4.23% 5 years 12.58 11.10 10.46 1 year 19.45 16.19 17.11 -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated April 1, 2017, as supplemented) -------------------------------------------------------------------------------- Gross Net -------------------------------------------------------------------------------- 1.08% 0.80% -------------------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $5 Million Investment Pioneer Global MSCI All Country Equity Fund MSCI World ND Index World ND Index 8/07 $5,000,000 $5,000,000 $5,000,000 8/08 $4,465,765 $4,396,502 $4,402,840 8/09 $3,771,839 $3,639,723 $3,679,585 8/10 $3,749,438 $3,695,926 $3,808,130 8/11 $4,160,494 $4,230,328 $4,330,428 8/12 $4,413,701 $4,573,805 $4,599,598 8/13 $5,285,570 $5,380,259 $5,311,429 8/14 $6,694,470 $6,515,261 $6,426,279 8/15 $6,394,785 $6,246,183 $6,022,300 8/16 $6,682,351 $6,663,652 $6,458,564 8/17 $7,982,211 $7,742,198 $7,563,777 Call 1-800-225-6292 or visit www.amundipioneer.com for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. Performance shown for periods prior to the inception of the Fund's Class Y shares on December 31, 2008, is the NAV performance of the Fund's Class A shares. The performance does not reflect differences in expenses, including the Rule 12b-1 fees applicable to Class A shares. Since fees for Class A shares are generally higher than those of Class Y shares, the performance for Class Y shares prior to their inception would have been higher than the performance shown. For the period beginning December 31, 2008, the actual performance of Class Y shares is reflected. Class Y shares are not subject to sales charges and are available for limited groups of eligible investors, including institutional investors. All results are historical and assume the reinvestment of dividends and capital gains. Other share classes are available for which performance and expenses will differ. Performance results reflect any applicable expense waivers in effect during the periods shown. Without such waivers Fund performance would be lower. Waivers may not be in effect for all funds. Certain fee waivers are contractual through a specified period. Otherwise, fee waivers can be rescinded at any time. See the prospectus and financial statements for more information. The net expense ratio reflects the contractual expense limitation currently in effect through January 1, 2019, for Class Y shares. There can be no assurance that Amundi Pioneer will extend the expense limitation beyond such time. Please see the prospectus and financial statements for more information. Please refer to the financial highlights for more recent expense ratios. The performance table and graph do not reflect the deduction of fees and taxes that a shareowner would pay on Fund distributions or the redemption of Fund shares. Pioneer Global Equity Fund | Annual Report | 8/31/17 17 Comparing Ongoing Fund Expenses As a shareowner in the Fund, you incur two types of costs: (1) ongoing costs, including management fees, distribution and/or service (12b-1) fees, and other Fund expenses; and (2) transaction costs, including sales charges (loads) on purchase payments and redemption fees. This example is intended to help you understand your ongoing expenses (in dollars) of investing in the Fund and to compare these costs with the ongoing costs of investing in other mutual funds. The example is based on an investment of $1,000 at the beginning of the Fund's latest six-month period and held throughout the six months. Using the Tables -------------------------------------------------------------------------------- Actual Expenses The first table below provides information about actual account values and actual expenses. You may use the information in this table, together with the amount you invested, to estimate the expenses that you paid over the period as follows: (1) Divide your account value by $1,000 Example: an $8,600 account value (divided by) $1,000 = 8.6 (2) Multiply the result in (1) above by the corresponding share class's number in the third row under the heading entitled "Expenses Paid During Period" to estimate the expenses you paid on your account during this period. Expenses Paid on a $1,000 Investment in Pioneer Global Equity Fund Based on actual returns from March 1, 2017, through August 31, 2017. ---------------------------------------------------------------------------------------------------- Share Class A C K R Y ---------------------------------------------------------------------------------------------------- Beginning Account $1,000.00 $1,000.00 $1,000.00 $1,000.00 $1,000.00 Value on 3/1/17 ---------------------------------------------------------------------------------------------------- Ending Account $1,106.67 $1,103.73 $1,109.52 $1,105.23 $1,109.31 Value on 8/31/17 ---------------------------------------------------------------------------------------------------- Expenses Paid $ 6.74 $ 10.61 $ 4.20 $ 8.22 $ 4.25 During Period* ---------------------------------------------------------------------------------------------------- * Expenses are equal to the Fund's annualized net expense ratio of 1.27%, 2.00%, 0.79%, 1.55% and 0.80% for Class A, Class C, Class K, Class R and Class Y shares, respectively, multiplied by the average account value over the period, multiplied by 184/365 (to reflect the one-half year period). 18 Pioneer Global Equity Fund | Annual Report | 8/31/17 Hypothetical Example for Comparison Purposes The table below provides information about hypothetical account values and hypothetical expenses based on the Fund's actual expense ratio and an assumed rate of return of 5% per year before expenses, which is not the Fund's actual return. The hypothetical account values and expenses may not be used to estimate the actual ending account balance or expenses you paid for the period. You may use this information to compare the ongoing costs of investing in the Fund and other funds. To do so, compare this 5% hypothetical example with the 5% hypothetical examples that appear in the shareholder reports of the other funds. Please note that the expenses shown in the tables are meant to highlight your ongoing costs only and do not reflect any transaction costs, such as sales charges (loads) or redemption fees that are charged at the time of the transaction. Therefore, the table below is useful in comparing ongoing costs only and will not help you determine the relative total costs of owning different funds. In addition, if these transaction costs were included, your costs would have been higher. Expenses Paid on a $1,000 Investment in Pioneer Global Equity Fund Based on a hypothetical 5% return per year before expenses, reflecting the period from March 1, 2017, through August 31, 2017. ----------------------------------------------------------------------------------------------------- Share Class A C K R Y ----------------------------------------------------------------------------------------------------- Beginning Account $1,000.00 $1,000.00 $1,000.00 $1,000.00 $1,000.00 Value on 3/1/17 ----------------------------------------------------------------------------------------------------- Ending Account $1,018.80 $1,015.12 $1,021.22 $1,017.39 $1,021.17 Value on 8/31/17 ----------------------------------------------------------------------------------------------------- Expenses Paid $ 6.46 $ 10.16 $ 4.02 $ 7.88 $ 4.08 During Period* ----------------------------------------------------------------------------------------------------- * Expenses are equal to the Fund's annualized net expense ratio of 1.27%, 2.00%, 0.79%, 1.55% and 0.80% for Class A, Class C, Class K, Class R and Class Y shares, respectively, multiplied by the average account value over the period, multiplied by 184/365 (to reflect the one-half year period). Pioneer Global Equity Fund | Annual Report | 8/31/17 19 Schedule of Investments | 8/31/17 ------------------------------------------------------------------------------------------ Shares Value ------------------------------------------------------------------------------------------ UNAFFILIATED ISSUERS -- 99.5% COMMON STOCKS -- 95.7% ENERGY -- 4.3% Integrated Oil & Gas -- 3.5% 120,047 TOTAL SA $ 6,210,051 ------------------------------------------------------------------------------------------ Oil & Gas Exploration & Production -- 0.8% 16,707 EOG Resources, Inc. $ 1,419,928 ------------- Total Energy $ 7,629,979 ------------------------------------------------------------------------------------------ MATERIALS -- 1.9% Diversified Chemicals -- 0.7% 19,229 The Dow Chemical Co. $ 1,281,613 ------------------------------------------------------------------------------------------ Construction Materials -- 1.2% 58,015 CRH Plc $ 2,035,488 ------------- Total Materials $ 3,317,101 ------------------------------------------------------------------------------------------ CAPITAL GOODS -- 7.1% Aerospace & Defense -- 2.5% 229,548 BAE Systems Plc $ 1,802,680 22,929 Thales SA 2,540,047 ------------- $ 4,342,727 ------------------------------------------------------------------------------------------ Heavy Electrical Equipment -- 0.5% 61,100 Mitsubishi Electric Corp. $ 906,394 ------------------------------------------------------------------------------------------ Industrial Conglomerates -- 0.9% 12,769 Siemens AG $ 1,669,249 ------------------------------------------------------------------------------------------ Trading Companies & Distributors -- 3.2% 48,459 United Rentals, Inc.* $ 5,721,070 ------------- Total Capital Goods $ 12,639,440 ------------------------------------------------------------------------------------------ AUTOMOBILES & COMPONENTS -- 3.4% Auto Parts & Equipment -- 2.7% 70,466 Valeo SA $ 4,717,078 ------------------------------------------------------------------------------------------ Tires & Rubber -- 0.7% 30,800 Bridgestone Corp. $ 1,323,687 ------------- Total Automobiles & Components $ 6,040,765 ------------------------------------------------------------------------------------------ CONSUMER DURABLES & APPAREL -- 5.2% Homebuilding -- 2.0% 190,200 Sekisui Chemical Co., Ltd. $ 3,552,221 ------------------------------------------------------------------------------------------ Apparel, Accessories & Luxury Goods -- 2.8% 82,393 Moncler S.p.A.* $ 2,343,954 21,008 PVH Corp. 2,644,697 ------------- $ 4,988,651 ------------------------------------------------------------------------------------------ The accompanying notes are an integral part of these financial statements. 20 Pioneer Global Equity Fund | Annual Report | 8/31/17 ------------------------------------------------------------------------------------------ Shares Value ------------------------------------------------------------------------------------------ Footwear -- 0.4% 152,000 ANTA Sports Products, Ltd. $ 598,216 ------------- Total Consumer Durables & Apparel $ 9,139,088 ------------------------------------------------------------------------------------------ CONSUMER SERVICES -- 3.4% Hotels, Resorts & Cruise Lines -- 2.0% 76,383 Accor SA $ 3,540,729 ------------------------------------------------------------------------------------------ Restaurants -- 1.4% 42,000 KOMEDA Holdings Co, Ltd. $ 704,043 32,306 Starbucks Corp. 1,772,307 ------------- $ 2,476,350 ------------- Total Consumer Services $ 6,017,079 ------------------------------------------------------------------------------------------ MEDIA -- 1.2% Advertising -- 1.2% 115,195 WPP Plc $ 2,114,494 ------------- Total Media $ 2,114,494 ------------------------------------------------------------------------------------------ FOOD & STAPLES RETAILING -- 3.2% Drug Retail -- 3.2% 92,000 Sundrug Co., Ltd. $ 3,828,902 22,085 Walgreens Boots Alliance, Inc. 1,799,928 ------------- $ 5,628,830 ------------- Total Food & Staples Retailing $ 5,628,830 ------------------------------------------------------------------------------------------ FOOD, BEVERAGE & TOBACCO -- 0.6% Tobacco -- 0.6% 17,462 Altria Group, Inc. $ 1,107,091 ------------- Total Food, Beverage & Tobacco $ 1,107,091 ------------------------------------------------------------------------------------------ HOUSEHOLD & PERSONAL PRODUCTS -- 0.6% Personal Products -- 0.6% 18,220 Unilever Plc $ 1,065,513 ------------- Total Household & Personal Products $ 1,065,513 ------------------------------------------------------------------------------------------ HEALTH CARE EQUIPMENT & SERVICES -- 0.8% Managed Health Care -- 0.8% 5,319 Humana, Inc. $ 1,370,281 ------------- Total Health Care Equipment & Services $ 1,370,281 ------------------------------------------------------------------------------------------ PHARMACEUTICALS, BIOTECHNOLOGY & LIFE SCIENCES -- 11.8% Biotechnology -- 5.0% 26,862 Celgene Corp.* $ 3,731,938 4,779 Esperion Therapeutics, Inc.* 236,178 36,975 Gilead Sciences, Inc.* 3,095,177 36,360 Shire Plc 1,810,467 ------------- $ 8,873,760 ------------------------------------------------------------------------------------------ The accompanying notes are an integral part of these financial statements. Pioneer Global Equity Fund | Annual Report | 8/31/17 21 Schedule of Investments | 8/31/17 (continued) ------------------------------------------------------------------------------------------ Shares Value ------------------------------------------------------------------------------------------ Pharmaceuticals -- 6.8% 27,854 Merck & Co., Inc. $ 1,778,756 70,197 Novartis AG 5,915,479 131,411 Pfizer, Inc. 4,457,461 ------------- $ 12,151,696 ------------- Total Pharmaceuticals, Biotechnology & Life Sciences $ 21,025,456 ------------------------------------------------------------------------------------------ BANKS -- 12.9% Diversified Banks -- 12.1% 458,605 Aldermore Group Plc $ 1,337,226 2,363,400 Bank Rakyat Indonesia Persero Tbk PT 2,683,993 74,590 BNP Paribas SA 5,680,332 39,108 Citigroup, Inc. 2,660,517 56,570 JPMorgan Chase & Co. 5,141,647 652,700 Mitsubishi UFJ Financial Group, Inc. 3,976,115 ------------- $ 21,479,830 ------------------------------------------------------------------------------------------ Regional Banks -- 0.8% 6,602,700 Bank Tabungan Negara Persero Tbk PT $ 1,488,982 ------------- Total Banks $ 22,968,812 ------------------------------------------------------------------------------------------ DIVERSIFIED FINANCIALS -- 9.9% Consumer Finance -- 2.5% 47,697 Discover Financial Services, Inc. $ 2,811,738 52,869 Synchrony Financial 1,627,837 ------------- $ 4,439,575 ------------------------------------------------------------------------------------------ Asset Management & Custody Banks -- 6.2% 27,674 Affiliated Managers Group, Inc.* $ 4,889,719 5,182 BlackRock, Inc. 2,171,310 6,658 Invesco, Ltd. 218,249 23,534 T. Rowe Price Group, Inc. 1,985,328 52,192 The Blackstone Group LP 1,708,244 ------------- $ 10,972,850 ------------------------------------------------------------------------------------------ Financial Exchanges & Data -- 1.2% 29,537 Nasdaq, Inc. $ 2,226,499 ------------- Total Diversified Financials $ 17,638,924 ------------------------------------------------------------------------------------------ INSURANCE -- 2.2% Insurance Brokers -- 0.8% 9,798 Willis Towers Watson Plc $ 1,454,709 ------------------------------------------------------------------------------------------ Multi-line Insurance -- 1.4% 11,101 Allianz SE* $ 2,374,926 ------------- Total Insurance $ 3,829,635 ------------------------------------------------------------------------------------------ The accompanying notes are an integral part of these financial statements. 22 Pioneer Global Equity Fund | Annual Report | 8/31/17 ------------------------------------------------------------------------------------------ Shares Value ------------------------------------------------------------------------------------------ SOFTWARE & SERVICES -- 13.8% Internet Software & Services -- 6.5% 3,805 Alphabet, Inc. (Class A) $ 3,634,688 3,888 Alphabet, Inc. (Class C) 3,652,115 95,300 eBay, Inc.* 3,443,189 35,833 Rocket Internet SE* 823,216 ------------- $ 11,553,208 ------------------------------------------------------------------------------------------ IT Consulting & Other Services -- 2.5% 473,000 Fujitsu, Ltd. $ 3,530,661 63,439 HCL Technologies, Ltd. 848,207 ------------- $ 4,378,868 ------------------------------------------------------------------------------------------ Data Processing & Outsourced Services -- 1.8% 22,290 PayPal Holdings, Inc. $ 1,374,847 18,482 Visa, Inc. 1,913,257 ------------- $ 3,288,104 ------------------------------------------------------------------------------------------ Systems Software -- 3.0% 71,284 Microsoft Corp. $ 5,329,905 ------------- Total Software & Services $ 24,550,085 ------------------------------------------------------------------------------------------ TECHNOLOGY HARDWARE & EQUIPMENT -- 8.4% Communications Equipment -- 0.5% 332,000 Accton Technology Corp. $ 873,883 ------------------------------------------------------------------------------------------ Computer Storage & Peripherals -- 4.3% 46,901 Apple, Inc. $ 7,691,765 ------------------------------------------------------------------------------------------ Technology Hardware, Storage & Peripherals -- 3.6% 3,057 Samsung Electronics Co., Ltd. $ 6,338,483 ------------------------------------------------------------------------------------------ Electronic Manufacturing Services -- 0.0%+ 26,225 Global Display Co., Ltd. $ 97,046 ------------- Total Technology Hardware & Equipment $ 15,001,177 ------------------------------------------------------------------------------------------ SEMICONDUCTORS & SEMICONDUCTOR EQUIPMENT -- 2.0% Semiconductors -- 2.0% 75,391 Micron Technology, Inc.* $ 2,410,250 168,000 Taiwan Semiconductor Manufacturing Co., Ltd. 1,211,649 ------------- $ 3,621,899 ------------- Total Semiconductors & Semiconductor Equipment $ 3,621,899 ------------------------------------------------------------------------------------------ TELECOMMUNICATION SERVICES -- 2.6% Integrated Telecommunication Services -- 0.7% 25,000 Nippon Telegraph & Telephone Corp. $ 1,244,745 ------------------------------------------------------------------------------------------ Wireless Telecommunication Services -- 1.9% 1,193,817 Vodafone Group Plc $ 3,415,521 ------------- Total Telecommunication Services $ 4,660,266 ------------------------------------------------------------------------------------------ The accompanying notes are an integral part of these financial statements. Pioneer Global Equity Fund | Annual Report | 8/31/17 23 Schedule of Investments | 8/31/17 (continued) ------------------------------------------------------------------------------------------ Shares Value ------------------------------------------------------------------------------------------ REAL ESTATE -- 0.4% Real Estate Services -- 0.4% 67,452 Savills Plc $ 772,435 ------------- Total Real Estate $ 772,435 ------------------------------------------------------------------------------------------ TOTAL COMMON STOCKS (Cost $143,252,933) $ 170,138,350 ------------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------------ Principal Amount ($) ------------------------------------------------------------------------------------------ U.S. GOVERNMENT AND AGENCY OBLIGATIONS -- 3.8% 4,390,000 U.S. Treasury Bills, 9/28/17 (b) $ 4,386,938 2,285,000 U.S. Treasury Bills, 9/7/17 (b) 2,284,665 ------------------------------------------------------------------------------------------ TOTAL U.S. GOVERNMENT AND AGENCY OBLIGATIONS (Cost $6,671,561) $ 6,671,603 ------------------------------------------------------------------------------------------ TOTAL INVESTMENT IN UNAFFILIATED ISSUERS -- 99.5% (Cost $149,924,494) (a) $ 176,809,953 ------------------------------------------------------------------------------------------ OTHER ASSETS & LIABILITIES -- 0.5% $ 890,265 ------------------------------------------------------------------------------------------ NET ASSETS -- 100.0% $ 177,700,218 ========================================================================================== + Amount rounds to less than 0.1%. * Non-income producing security. (a) Distributions of investments by country of issue, as a percentage of total investment in securities (excluding temporary cash investments), are as follows: United States 52.0% France 12.8% Japan 10.8% United Kingdom 5.9% South Korea 3.6% Switzerland 3.3% Ireland 3.0% Germany 2.8% Indonesia 2.4% Italy 1.3% Taiwan 1.2% Other (individually less than 1%) 0.9% ----- 100.0% ===== (b) Security issued with a zero coupon. Income is earned through accretion of discount. Purchases and sales of securities (excluding temporary cash investments) for the year ended August 31, 2017 aggregated to $133,465,263 and $143,486,548, respectively. The accompanying notes are an integral part of these financial statements. 24 Pioneer Global Equity Fund | Annual Report | 8/31/17 The Fund is permitted to engage in purchase and sale transactions ("cross trades") with certain Funds and accounts for which Amundi Pioneer Asset Management, Inc., formerly Pioneer Investment Management, Inc. (the Adviser) serves as investment adviser, as set forth in Rule 17a-7 under the Investment Company Act of 1940, pursuant to procedures adopted by the Board of Trustees. Under these procedures, cross trades are effected at current market prices. During the year ended August 31, 2017, the Fund engaged in purchases and sales pursuant to these procedures amounting to $3,340,343 and $4,627,694, respectively, which resulted in a net realized loss of $524. SWAP CONTRACTS TOTAL RETURN SWAP AGREEMENTS ----------------------------------------------------------------------------------------------------------------------- Obligation Annual Premiums Unrealized Notional Counter- Entity/ Pay/ Fixed Pay/ Floating Expiration Paid/ Appreciation/ Amount ($)(1) party Index Receive Rate Receive Rate Date Received Value ----------------------------------------------------------------------------------------------------------------------- JPY 123,810 Societe Solactive Receive 0.39% Pay 3M Libor + 9/12/17 $ -- $26,774 Generale SA Japanese 40 bps Buyback Index ----------------------------------------------------------------------------------------------------------------------- TOTAL SWAP CONTRACTS $ -- $26,774 ======================================================================================================================= (1) The notional amount is the maximum amount that a seller of credit protection would be obligated to pay upon occurrence of a credit event. NOTE: Principal amounts are denominated in U.S. Dollars unless otherwise noted: JPY Japanese Yen FUTURES CONTRACTS CURRENCY FUTURES CONTRACTS -------------------------------------------------------------------------------- Settlement Contracts Month/ Notional Market Unrealized (Short) Description Year Amount Value Depreciation -------------------------------------------------------------------------------- (24) Euro FX Currency 9/17 (3,503,264) $(3,573,600) $(70,336) -------------------------------------------------------------------------------- TOTAL FUTURES CONTRACTS $(70,336) ================================================================================ At August 31, 2017, the net unrealized appreciation on investments based on cost for federal income tax purposes of $150,237,541 was as follows: Aggregate gross unrealized appreciation for all investments in which there is an excess of value over tax cost $29,516,142 Aggregate gross unrealized depreciation for all investments in which there is an excess of tax cost over value (2,987,292) ----------- Net unrealized appreciation $26,528,850 =========== Various inputs are used in determining the value of the Fund's investments. These inputs are summarized in the three broad levels listed below. Level 1 - quoted prices in active markets for identical securities. Level 2 - other significant observable inputs (including quoted prices for similar securities, interest rates, prepayment speeds, credit risk, etc.) See Notes to Financial Statements -- Note 1A. Level 3 - significant unobservable inputs (including the Fund's own assumptions in determining fair value of investments) See Notes to Financial Statements -- Note 1A. The accompanying notes are an integral part of these financial statements. Pioneer Global Equity Fund | Annual Report | 8/31/17 25 Schedule of Investments | 8/31/17 (continued) The following is a summary of the inputs used as of August 31, 2017, in valuing the Fund's investments: ------------------------------------------------------------------------------------------------------ Level 1 Level 2 Level 3 Total ------------------------------------------------------------------------------------------------------ Common Stocks Energy Integrated Oil & Gas $ -- $ 6,210,051 $ -- $ 6,210,051 Materials Construction Materials -- 2,035,488 -- 2,035,488 Capital Goods Aerospace & Defense -- 4,342,727 -- 4,342,727 Heavy Electrical Equipment -- 906,394 -- 906,394 Industrial Conglomerates -- 1,669,249 -- 1,669,249 Automobiles & Components Auto Parts & Equipment -- 4,717,078 -- 4,717,078 Tires & Rubber -- 1,323,687 -- 1,323,687 Consumer Durables & Apparel Homebuilding -- 3,552,221 -- 3,552,221 Apparel, Accessories & Luxury Goods 2,644,697 2,343,954 -- 4,988,651 Footwear -- 598,216 -- 598,216 Consumer Services Hotels, Resorts & Cruise Lines -- 3,540,729 -- 3,540,729 Restaurants 1,772,307 704,043 -- 2,476,350 Media Advertising -- 2,114,494 -- 2,114,494 Food & Staples Retailing Drug Retail 1,799,928 3,828,902 -- 5,628,830 Household & Personal Products Personal Products -- 1,065,513 -- 1,065,513 Pharmaceuticals, Biotechnology & Life Sciences Biotechnology 7,063,293 1,810,467 -- 8,873,760 Pharmaceuticals 6,236,217 5,915,479 -- 12,151,696 Banks Diversified Banks 7,802,164 13,677,666 -- 21,479,830 Regional Banks -- 1,488,982 -- 1,488,982 Insurance Multi-line Insurance -- 2,374,926 -- 2,374,926 Software & Services Internet Software & Services 10,729,992 823,216 -- 11,553,208 IT Consulting & Other Services -- 4,378,868 -- 4,378,868 Technology Hardware & Equipment Communications Equipment -- 873,883 -- 873,883 Technology Hardware, Storage & Peripherals -- 6,338,483 -- 6,338,483 Electronic Manufacturing Services -- 97,046 -- 97,046 Semiconductors & Semiconductor Equipment Semiconductors 2,410,250 1,211,649 -- 3,621,899 The accompanying notes are an integral part of these financial statements. 26 Pioneer Global Equity Fund | Annual Report | 8/31/17 ------------------------------------------------------------------------------------------------- Level 1 Level 2 Level 3 Total ------------------------------------------------------------------------------------------------- Telecommunication Services Integrated Telecommunication Services $ -- $ 1,244,745 $ -- $ 1,244,745 Wireless Telecommunication Services -- 3,415,521 -- 3,415,521 Real Estate Real Estate Services -- 772,435 -- 772,435 All Other Common Stocks 46,303,390 -- -- 46,303,390 US Government and Agency Obligations -- 6,671,603 -- 6,671,603 ------------------------------------------------------------------------------------------------- Total $86,762,238 $90,047,715 $ -- $ 176,809,953 ================================================================================================= During the year ended August 31, 2017, there were no transfers between Levels 1, 2 and 3. ------------------------------------------------------------------------------------------------- Level 1 Level 2 Level 3 Total ------------------------------------------------------------------------------------------------- Other Financial Instruments Unrealized appreciation on swap contracts $ -- $ 26,774 $ -- $ 26,774 Unrealized depreciation on future contracts (70,336) -- -- (70,336) ------------------------------------------------------------------------------------------------- Total Other Financial Instruments $ (70,336) $ 26,774 $ -- $ (43,562) ================================================================================================= The accompanying notes are an integral part of these financial statements. Pioneer Global Equity Fund | Annual Report | 8/31/17 27 Statement of Assets and Liabilities | 8/31/17 ASSETS: Investment in securities of unaffiliated issuers, at value (cost $149,924,494) $ 176,809,953 Cash 5,269,826 Foreign currencies, at value (cost $153,396) 154,592 Futures collateral 110,000 Receivables -- Investment securities sold 125,725 Fund shares sold 225,825 Dividends 353,567 Swap contracts, at value (net premiums paid $-) 26,774 Due from broker for futures 70,287 Due from the Adviser 73,507 Other assets 26,546 ------------------------------------------------------------------------------------------------- Total assets $ 183,246,602 ================================================================================================= LIABILITIES: Payables -- Investment securities purchased $ 5,187,222 Fund shares repurchased 91,486 Trustee fees 1,118 Unrealized depreciation on open futures contracts 70,336 Variation margin for futures contracts 2,850 Due to affiliates 91,483 Accrued expenses 101,889 ------------------------------------------------------------------------------------------------- Total liabilities $ 5,546,384 ================================================================================================= NET ASSETS: Paid-in capital $ 142,845,471 Undistributed net investment income 909,322 Accumulated net realized gain on investments 7,098,460 Net unrealized appreciation on investments 26,846,965 ------------------------------------------------------------------------------------------------- Net assets $ 177,700,218 ================================================================================================= NET ASSET VALUE PER SHARE: (No par value, unlimited number of shares authorized) Class A (based on $78,417,210/4,971,505 shares) $ 15.77 Class C (based on $12,056,342/782,090 shares) $ 15.42 Class K (based on $56,693,379/3,585,591 shares) $ 15.81 Class R (based on $17,586,525/1,123,431 shares) $ 15.65 Class Y (based on $12,946,762/817,691 shares) $ 15.83 MAXIMUM OFFERING PRICE: Class A ($15.77 (divided by) 94.25%) $ 16.73 ================================================================================================= The accompanying notes are an integral part of these financial statements. 28 Pioneer Global Equity Fund | Annual Report | 8/31/17 Statement of Operations For the Year Ended 8/31/17 INVESTMENT INCOME: Dividends from unaffiliated issuers (net of foreign taxes withheld of $239,725) $ 3,297,395 Interest from unaffiliated issuers (net of foreign taxes withheld of $4,395) 59,877 ----------------------------------------------------------------------------------------------- Total investment income $ 3,357,272 ----------------------------------------------------------------------------------------------- EXPENSES: Management fees $ 1,222,796 Transfer agent fees Class A 115,366 Class C 18,804 Class K 54 Class R 42,865 Class Y 9,443 Distribution fees Class A 181,807 Class C 120,021 Class R 82,123 Shareholder communications expense 59,041 Administrative expense 101,385 Custodian fees 59,847 Registration fees 88,141 Professional fees 64,828 Printing expense 37,115 Fees and expenses of nonaffiliated Trustees 7,370 Miscellaneous 17,306 ----------------------------------------------------------------------------------------------- Total expenses $ 2,228,312 Less fees waived and expenses reimbursed by the Adviser (322,326) ----------------------------------------------------------------------------------------------- Net expenses $ 1,905,986 ----------------------------------------------------------------------------------------------- Net investment income $ 1,451,286 ----------------------------------------------------------------------------------------------- REALIZED AND UNREALIZED GAIN (LOSS) ON INVESTMENTS: Net realized gain (loss) on: Investments from unaffiliated issuers $13,008,625 Futures contracts (172,721) Swap contracts 1,639,855 Other assets and liabilities denominated in foreign currencies (86,624) $14,389,135 ----------------------------------------------------------------------------------------------- Change in net unrealized appreciation (depreciation) on: Investments from unaffiliated issuers $12,723,024 Futures contracts (70,336) Swap contracts 26,774 Other assets and liabilities denominated in foreign currencies 17,427 $12,696,889 ----------------------------------------------------------------------------------------------- Net realized and unrealized gain (loss) on investments $27,086,024 ----------------------------------------------------------------------------------------------- Net increase in net assets resulting from operations $28,537,310 =============================================================================================== The accompanying notes are an integral part of these financial statements. Pioneer Global Equity Fund | Annual Report | 8/31/17 29 Statements of Changes in Net Assets ---------------------------------------------------------------------------------------- Year Ended Year Ended 8/31/2017 8/31/2016* ---------------------------------------------------------------------------------------- FROM OPERATIONS: Net investment income (loss) $ 1,451,286 $ 2,077,660 Net realized gain (loss) on investments 14,389,135 (7,340,989) Change in net unrealized appreciation (depreciation) on investments 12,696,889 10,633,268 ---------------------------------------------------------------------------------------- Net increase in net assets resulting from operations $ 28,537,310 $ 5,369,939 ---------------------------------------------------------------------------------------- DISTRIBUTIONS TO SHAREOWNERS: Net investment income: Class A ($0.17 and $0.08 per share, respectively) $ (860,989) $ (471,470) Class C ($0.06 and $0.00 per share, respectively) (55,611) -- Class K ($0.24 and $0.15 per share, respectively) (924,024) (589,987) Class R ($0.15 and $0.13 per share, respectively) (172,785) (76,329) Class Y ($0.25 and $0.15 per share, respectively) (145,060) (271,227) ---------------------------------------------------------------------------------------- Total distributions to shareowners $ (2,158,469) $ (1,409,013) ---------------------------------------------------------------------------------------- FROM FUND SHARE TRANSACTIONS: (a) Net proceeds from sale of shares $ 25,442,861 $ 33,783,592 Reinvestment of distributions 1,004,283 658,359 Cost of shares repurchased (35,863,738) (48,756,116) ---------------------------------------------------------------------------------------- Net decrease in net assets resulting from Fund share transactions $ (9,416,594) $ (14,314,165) ---------------------------------------------------------------------------------------- Net increase (decrease) in net assets $ 16,962,247 $ (10,353,239) NET ASSETS: Beginning of year $160,737,971 $ 171,091,210 ---------------------------------------------------------------------------------------- End of year $177,700,218 $ 160,737,971 ---------------------------------------------------------------------------------------- Undistributed net investment income $ 909,322 $ 1,717,208 ======================================================================================== (a) At August 31, 2017, Pioneer Asset Allocation Trust owned 27.4% of the value of outstanding shares of Pioneer Global Equity Fund. * The Fund was audited by another independent registered public accounting firm other than Ernst & Young LLP. The accompanying notes are an integral part of these financial statements. 30 Pioneer Global Equity Fund | Annual Report | 8/31/17 ---------------------------------------------------------------------------------------- Year Ended Year Ended Year Ended Year Ended 8/31/2017 8/31/2017 8/31/2016 8/31/2016 Shares Amount Shares* Amount* ---------------------------------------------------------------------------------------- Class A Shares sold 501,676 $ 7,310,949 911,559 $ 11,889,430 Reinvestment of distributions 61,082 827,065 33,914 450,034 Less shares repurchased (1,124,071) (15,803,442) (1,344,828) (17,206,097) ---------------------------------------------------------------------------------------- Net decrease (561,313) $ (7,665,428) (399,355) $ (4,866,633) ======================================================================================== Class C Shares sold 178,880 $ 2,530,087 222,781 $ 2,826,420 Reinvestment of distributions 3,968 52,774 -- -- Less shares repurchased (327,861) (4,621,635) (360,772) (4,537,583) ---------------------------------------------------------------------------------------- Net decrease (145,013) $ (2,038,774) (137,991) $ (1,711,163) ======================================================================================== Class K Shares sold -- $ -- -- $ -- Reinvestment of distributions -- -- -- -- Less shares repurchased (290,349) (4,168,272) (290,122) (3,661,494) ---------------------------------------------------------------------------------------- Net decrease (290,349) $ (4,168,272) (290,122) $ (3,661,494) ======================================================================================== Class R Shares sold 372,467 $ 5,188,282 1,056,022 $ 13,514,533 Reinvestment of distributions -- -- -- -- Less shares repurchased (339,305) (4,879,933) (143,077) (1,834,686) ---------------------------------------------------------------------------------------- Net increase 33,162 $ 308,349 912,945 $ 11,679,847 ======================================================================================== Class Y Shares sold 707,014 $ 10,413,543 426,331 $ 5,553,209 Reinvestment of distributions 9,184 124,444 15,675 208,325 Less shares repurchased (450,320) (6,390,456) (1,713,296) (21,516,256) ---------------------------------------------------------------------------------------- Net increase (decrease) 265,878 $ 4,147,531 (1,271,290) $ (15,754,722) ======================================================================================== * The Fund was audited by another independent registered public accounting firm other than Ernst & Young LLP. The accompanying notes are an integral part of these financial statements. Pioneer Global Equity Fund | Annual Report | 8/31/17 31 Financial Highlights ---------------------------------------------------------------------------------------------------------------------------- Year Year Year Year Year Ended Ended Ended Ended Ended 8/31/2017 8/31/2016** 8/31/2015** 8/31/2014** 8/31/2013 ---------------------------------------------------------------------------------------------------------------------------- Class A Net asset value, beginning of period $ 13.43 $ 13.00 $ 14.05 $ 11.31 $ 9.64 ---------------------------------------------------------------------------------------------------------------------------- Increase (decrease) from investment operations: Net investment income (loss) $ 0.11(a) $ 0.14(a) $ 0.07 $ 0.27 $ 0.15 Net realized and unrealized gain (loss) on investments 2.40 0.37 (0.74) 2.67 1.68 ---------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) from investment operations $ 2.51 $ 0.51 $ (0.67) $ 2.94 $ 1.83 ---------------------------------------------------------------------------------------------------------------------------- Distribution to shareowners: Net investment income $ (0.17) $ (0.08) $ (0.38) $ (0.20) $ (0.16) ---------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) in net asset value $ 2.34 $ 0.43 $ (1.05) $ 2.74 $ 1.67 ---------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $ 15.77 $ 13.43 $ 13.00 $ 14.05 $ 11.31 ============================================================================================================================ Total return* 18.89% 3.92% (4.88)% 26.13% 19.17% Ratio of net expenses to average net assets 1.27% 1.30% 1.30% 1.30% 1.30% Ratio of net investment income (loss) to average net assets 0.79% 1.08% 0.60% 2.01% 1.35% Portfolio turnover rate 85% 88% 109% 121% 160% Net assets, end of period (in thousands) $78,417 $74,333 $77,115 $76,638 $62,996 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Total expenses to average net assets 1.46% 1.45% 1.50% 1.56% 1.67% Net investment income (loss) to average net assets 0.60% 0.94% 0.40% 1.75% 0.98% ============================================================================================================================ * Assumes initial investment at net asset value at the beginning of each period, reinvestment of all distributions, the complete redemption of the investment at net asset value at the end of each period and no sales charges. Total return would be reduced if sales charges were taken into account. ** The Fund was audited by another independent registered public accounting firm other than Ernst & Young LLP. (a) The per-share data presented above is based on the average shares outstanding for the period presented. The accompanying notes are an integral part of these financial statements. 32 Pioneer Global Equity Fund | Annual Report | 8/31/17 ------------------------------------------------------------------------------------------------------------------------ Year Year Year Year Year Ended Ended Ended Ended Ended 8/31/2017 8/31/2016** 8/31/2015** 8/31/2014** 8/31/2013 ------------------------------------------------------------------------------------------------------------------------ Class C Net asset value, beginning of period $ 13.13 $ 12.72 $ 13.78 $ 11.11 $ 9.47 ------------------------------------------------------------------------------------------------------------------------ Increase (decrease) from investment operations: Net investment income (loss) $ 0.01(b) $ 0.04(b) $ (0.08)(a) $ 0.14 $ 0.05 Net realized and unrealized gain (loss) on investments 2.34 0.37 (0.68) 2.63 1.66 ------------------------------------------------------------------------------------------------------------------------ Net increase (decrease) from investment operations $ 2.35 $ 0.41 $ (0.76) $ 2.77 $ 1.71 ------------------------------------------------------------------------------------------------------------------------ Distribution to shareowners: Net investment income $ (0.06) $ -- $ (0.30) $ (0.10) $ (0.07) ------------------------------------------------------------------------------------------------------------------------ Net increase (decrease) in net asset value $ 2.29 $ 0.41 $ (1.06) $ 2.67 $ 1.64 ------------------------------------------------------------------------------------------------------------------------ Net asset value, end of period $ 15.42 $ 13.13 $ 12.72 $ 13.78 $ 11.11 ======================================================================================================================== Total return* 18.00% 3.22% (5.60)% 24.98% 18.11% Ratio of net expenses to average net assets 2.00% 2.03% 2.05% 2.20% 2.20% Ratio of net investment income (loss) to average net assets 0.07% 0.35% (0.14)% 1.13% 0.45% Portfolio turnover rate 85% 88% 109% 121% 160% Net assets, end of period (in thousands) $12,056 $12,170 $13,552 $ 8,427 $ 6,516 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Total expenses to average net assets 2.19% 2.16% 2.21% 2.35% 2.51% Net investment income (loss) to average net assets (0.12)% 0.22% (0.30)% 0.98% 0.14% ======================================================================================================================== * Assumes initial investment at net asset value at the beginning of each period, reinvestment of all distributions, the complete redemption of the investment at net asset value at the end of each period and no sales charges. Total return would be reduced if sales charges were taken into account. ** The Fund was audited by another independent registered public accounting firm other than Ernst & Young LLP. (a) The amount shown for a share outstanding does not correspond with net investment income on the Statement of Operations for the relevant period due to timing of the sales and repurchase of shares. (b) The per-share data presented above is based on the average shares outstanding for the period presented. The accompanying notes are an integral part of these financial statements. Pioneer Global Equity Fund | Annual Report | 8/31/17 33 Financial Highlights (continued) ----------------------------------------------------------------------------------------- Year Year 12/31/2014 Ended Ended to 8/31/2017 8/31/2016**** 8/31/2015**** ----------------------------------------------------------------------------------------- Class K Net asset value, beginning of period $ 13.47 $ 13.03 $ 13.51 ----------------------------------------------------------------------------------------- Increase (decrease) from investment operations: Net investment income (loss) $ 0.18(a) $ 0.21(a) $ 0.11 Net realized and unrealized gain (loss) on investments 2.40 0.38 (0.59) ----------------------------------------------------------------------------------------- Net increase (decrease) from investment operations $ 2.58 $ 0.59 $ (0.48) ----------------------------------------------------------------------------------------- Distribution to shareowners: Net investment income $ (0.24) $ (0.15) $ -- ----------------------------------------------------------------------------------------- Net increase (decrease) in net asset value $ 2.34 $ 0.44 $ (0.48) ----------------------------------------------------------------------------------------- Net asset value, end of period $ 15.81 $ 13.47 $ 13.03 ========================================================================================= Total return* 19.44% 4.51% (3.55)%*** Ratio of net expenses to average net assets 0.79% 0.79% 0.79%** Ratio of net investment income (loss) to average net assets 1.26% 1.58% 1.44%** Portfolio turnover rate 85% 88% 109% Net assets, end of period (in thousands) $56,693 $52,222 $54,305 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Total expenses to average net assets 0.98% 0.92% 0.95%** Net investment income (loss) to average net assets 1.07% 1.45% 1.28%** ========================================================================================= * Assumes initial investment at net asset value at the beginning of each period, reinvestment of all distributions and the complete redemption of the investment at net asset value at the end of each period. ** Annualized. *** Not annualized. **** The Fund was audited by another independent registered public accounting firm other than Ernst & Young LLP. (a) The per-share data presented above is based on the average shares outstanding for the period presented. The accompanying notes are an integral part of these financial statements. 34 Pioneer Global Equity Fund | Annual Report | 8/31/17 ---------------------------------------------------------------------------------------- Year Year 7/1/2015 Ended Ended to 8/31/2017 8/31/2016**** 8/31/2015**** ---------------------------------------------------------------------------------------- Class R Net asset value, beginning of period $ 13.36 $ 12.99 $ 14.08 ---------------------------------------------------------------------------------------- Increase (decrease) from investment operations: Net investment income (loss) $ 0.08(a) $ 0.13(a) $ 0.00(b) Net realized and unrealized gain (loss) on investments 2.36 0.37 (1.09) ---------------------------------------------------------------------------------------- Net increase (decrease) from investment operations $ 2.44 $ 0.50 $ (1.09) ---------------------------------------------------------------------------------------- Distribution to shareowners: Net investment income $ (0.15) $ (0.13) $ -- ---------------------------------------------------------------------------------------- Net increase (decrease) in net asset value $ 2.29 $ 0.37 $ (1.09) ---------------------------------------------------------------------------------------- Net asset value, end of period $ 15.65 $ 13.36 $ 12.99 ======================================================================================== Total return* 18.47% 3.85% (7.74)%*** Ratio of net expenses to average net assets 1.55% 1.55% 1.38%** Ratio of net investment income (loss) to average net assets 0.54% 1.04% 0.25%** Portfolio turnover rate 85% 88% 109% Net assets, end of period (in thousands) $17,587 $14,562 $ 2,304 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Total expenses to average net assets 1.75% 1.68% 1.55%** Net investment income (loss) to average net assets 0.34% 0.91% 0.08%** ======================================================================================== * Assumes initial investment at net asset value at the beginning of each period, reinvestment of all distributions and the complete redemption of the investment at net asset value at the end of each period. ** Annualized. *** Not annualized. **** The Fund was audited by another independent registered public accounting firm other than Ernst & Young LLP. (a) The per-share data presented above is based on the average shares outstanding for the period presented. (b) Amount rounds to less than $0.01 or ($0.01) per share. The accompanying notes are an integral part of these financial statements. Pioneer Global Equity Fund | Annual Report | 8/31/17 35 Financial Highlights (continued) --------------------------------------------------------------------------------------------------------------------------- Year Year Year Year Year Ended Ended Ended Ended Ended 8/31/2017 8/31/2016** 8/31/2015** 8/31/2014** 8/31/2013 --------------------------------------------------------------------------------------------------------------------------- Class Y Net asset value, beginning of period $ 13.50 $ 13.06 $ 14.12 $ 11.37 $ 9.69 --------------------------------------------------------------------------------------------------------------------------- Increase (decrease) from investment operations: Net investment income (loss) $ 0.18(a) $ 0.20(a) $ 0.01 $ 0.37 $ 0.20 Net realized and unrealized gain (loss) on investments 2.40 0.39 (0.62) 2.63 1.69 --------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) from investment operations $ 2.58 $ 0.59 $ (0.61) $ 3.00 $ 1.89 --------------------------------------------------------------------------------------------------------------------------- Distribution to shareowners: Net investment income $ (0.25) $ (0.15) $ (0.45) $ (0.25) $ (0.21) --------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) in net asset value $ 2.33 $ 0.44 $ (1.06) $ 2.75 $ 1.68 --------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $ 15.83 $ 13.50 $ 13.06 $ 14.12 $ 11.37 =========================================================================================================================== Total return* 19.45% 4.50% (4.48)% 26.66% 19.75% Ratio of net expenses to average net assets 0.80% 0.80% 0.80% 0.80% 0.80% Ratio of net investment income (loss) to average net assets 1.22% 1.55% 0.85% 2.58% 1.85% Portfolio turnover rate 85% 88% 109% 121% 160% Net assets, end of period (in thousands) $12,947 $ 7,450 $23,815 $70,384 $71,726 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Total expenses to average net assets 1.10% 1.08% 0.96% 0.95% 1.00% Net investment income (loss) to average net assets 0.92% 1.27% 0.69% 2.43% 1.65% =========================================================================================================================== * Assumes initial investment at net asset value at the beginning of each period, reinvestment of all distributions and the complete redemption of the investment at net asset value at the end of each period. ** The Fund was audited by another independent registered public accounting firm other than Ernst & Young LLP. (a) The per-share data presented above is based on the average shares outstanding for the period presented. The accompanying notes are an integral part of these financial statements. 36 Pioneer Global Equity Fund | Annual Report | 8/31/17 Notes to Financial Statements | 8/31/17 1. Organization and Significant Accounting Policies Pioneer Global Equity Fund (the Fund) is one of three portfolios comprising Pioneer Series Trust V, a Delaware statutory trust. The Fund is registered under the Investment Company Act of 1940 as a diversified, open-end management investment company. The Fund's investment objective is to seek long-term capital growth. The Fund offers five classes of shares designated as Class A, Class C, Class K, Class R and Class Y shares. Each class of shares represents an interest in the same portfolio of investments of the Fund and has identical rights (based on relative net asset values) to assets and liquidation proceeds. Share classes can bear different rates of class-specific fees and expenses such as transfer agent and distribution fees. Differences in class-specific fees and expenses will result in differences in net investment income and, therefore, the payment of different dividends from net investment income earned by each class. The Amended and Restated Declaration of Trust of the Fund gives the Board of Trustees the flexibility to specify either per-share voting or dollar-weighted voting when submitting matters for shareholder approval. Under per-share voting, each share of a class of the Fund is entitled to one vote. Under dollar-weighted voting, a shareholder's voting power is determined not by the number of shares owned, but by the dollar value of the shares on the record date. Each share class has exclusive voting rights with respect to matters affecting only that class, including with respect to the distribution plan for that class. There is no distribution plan for Class K and Class Y shares. On July 3, 2017, Amundi acquired Pioneer Investments, a group of asset management companies located throughout the world. Amundi, one of the world's largest asset managers, is headquartered in Paris, France. As a result of the transaction, Pioneer Investment Management, Inc., the Fund's investment adviser, became an indirect wholly owned subsidiary of Amundi and Amundi's wholly owned subsidiary, Amundi USA, Inc. Prior to July 3, 2017, Pioneer Investments was owned by Pioneer Global Asset Management S.p.A., a wholly owned subsidiary of UniCredit S.p.A. In connection with the transaction, the names of the Fund's investment adviser and principal underwriter changed. Effective July 3, 2017, the name of Pioneer Investment Management, Inc. changed to Amundi Pioneer Asset Management, Inc. (the Adviser) and the name of Pioneer Funds Distributor, Inc. changed to Amundi Pioneer Distributor, Inc. (the Distributor). Pioneer Global Equity Fund | Annual Report | 8/31/17 37 In October 2016, the Securities and Exchange Commission (SEC) released its Final Rule on Investment Company Reporting Modernization. In addition to introducing two new regulatory reporting forms (Form N-PORT and Form N-CEN), the Final Rule amends Regulation S-X, which impacts financial statement presentation, particularly related to the presentation of derivative investments. Financial statements with a period end date on or after August 1, 2017 are required to be in compliance with the amendments to Regulation S-X. The Fund's financial statements were prepared in compliance with the amendments to Regulation S-X. The Fund's financial statements have been prepared in conformity with U.S. generally accepted accounting principles (U.S. GAAP) that require the management of the Fund to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of income, expenses and gain or loss on investments during the reporting period. Actual results could differ from those estimates. The Fund is an investment company and follows investment company accounting and reporting guidance under U.S. GAAP. The following is a summary of significant accounting policies followed by the Fund in the preparation of its financial statements: A. Security Valuation The net asset value of the Fund is computed once daily, on each day the New York Stock Exchange (NYSE) is open, as of the close of regular trading on the NYSE. Equity securities that have traded on an exchange are valued by using the last sale price on the principal exchange where they are traded. Equity securities that have not traded on the date of valuation, or securities for which sale prices are not available, generally are valued using the mean between the last bid and asked prices or, if both last bid and asked prices are not available, at the last quoted bid price. Last sale and bid and asked prices are provided by independent third party pricing services. In the case of equity securities not traded on an exchange, prices are typically determined by independent third party pricing services using a variety of techniques and methods. The principal exchanges and markets for non-U.S. equity securities have closing times prior to the close of the NYSE. However, the value of these securities may be influenced by changes in global markets occurring after the closing times of the local exchanges and markets up to the time the Fund determines its net asset value. Consequently, the Fund uses a fair value model 38 Pioneer Global Equity Fund | Annual Report | 8/31/17 developed by an independent pricing service to value non-U.S. equity securities. On a daily basis, the pricing service recommends changes, based on a proprietary model, to the closing market prices of each non-U.S. security held by the Fund to reflect the security's fair value at the time the Fund determines its net asset value. The Fund applies these recommendations in accordance with procedures approved by the Board of Trustees. Fixed-income securities are valued by using prices supplied by independent pricing services, which consider such factors as market prices, market events, quotations from one or more brokers, Treasury spreads, yields, maturities and ratings, or may use a pricing matrix or other fair value methods or techniques to provide an estimated value of the security or instrument. A pricing matrix is a means of valuing a debt security on the basis of current market prices for other debt securities, historical trading patterns in the market for fixed-income securities and/or other factors. Non-U.S. debt securities that are listed on an exchange will be valued at the bid price obtained from an independent third party pricing service. When independent third party pricing services are unable to supply prices, or when prices or market quotations are considered to be unreliable, the value of that security may be determined using quotations from one or more broker-dealers. Cash may include overnight deposits at approved financial institutions. Futures contracts are generally valued at the closing settlement price established by the exchange on which they are traded. Swap contracts, including interest rate swaps, caps and floors (other than centrally cleared swap contracts) are valued at the dealer quotations obtained from reputable International Swap Dealers Association members. Centrally cleared swaps are valued at the daily settlement price provided by the central clearing counterparty. Securities or loan interests for which independent pricing services or broker dealers are unable to supply prices or for which market prices and/or quotations are not readily available or are considered to be unreliable are valued by a fair valuation team comprised of certain personnel of the Adviser pursuant to procedures adopted by the Fund's Board of Trustees. The Adviser's fair valuation team uses fair value methods approved by the Valuation Committee of the Board of Trustees. The Adviser's fair valuation team is responsible for monitoring developments that may impact fair valued securities and for discussing and assessing fair values on an ongoing basis, and at least quarterly, with the Valuation Committee of the Board of Trustees. Inputs used when applying fair value methods to value a security may include credit ratings, the financial condition of the company, current market conditions and comparable securities. The Fund may use fair value methods Pioneer Global Equity Fund | Annual Report | 8/31/17 39 if it is determined that a significant event has occurred after the close of the exchange or market on which the security trades and prior to the determination of the Fund's net asset value. Examples of a significant event might include political or economic news, corporate restructurings, natural disasters, terrorist activity or trading halts. Thus, the valuation of the Fund's securities may differ significantly from exchange prices, and such differences could be material. At August 31, 2017, no securities were valued using fair value methods (other than securities valued using prices supplied by independent pricing services). B. Investment Income and Transactions Dividend income is recorded on the ex-dividend date, except that certain dividends from foreign securities where the ex-dividend date may have passed are recorded as soon as the Fund becomes aware of the ex-dividend data in the exercise of reasonable diligence. Interest income is recorded on the accrual basis. Dividend and interest income are reported net of unrecoverable foreign taxes withheld at the applicable country rates. Interest and dividend income payable by delivery of additional shares is reclassified as PIK (payment-in-kind) income upon receipt and is included in interest and dividend income, respectively. Security transactions are recorded as of trade date. Gains and losses on sales of investments are calculated on the identified cost method for both financial reporting and federal income tax purposes. C. Federal Income Taxes It is the Fund's policy to comply with the requirements of the Internal Revenue Code applicable to regulated investment companies and to distribute all of its taxable income and net realized capital gains, if any, to its shareowners. Therefore, no provision for federal income taxes is required. As of August 31, 2017, the Fund did not accrue any interest or penalties with respect to uncertain tax positions, which, if applicable, would be recorded as an income tax expense in the Statement of Operations. Tax returns filed within the prior three years are subject to examination by Federal and State tax authorities. In addition to the requirements of the Internal Revenue Code, the Fund may also be required to pay local taxes on the recognition of capital gains and/or the repatriation of foreign currencies in certain countries. In determining the daily net asset value, the Fund estimates the reserve for such taxes, if any, associated with investments in certain countries. The estimated reserve for the capital gains is based on the net unrealized 40 Pioneer Global Equity Fund | Annual Report | 8/31/17 appreciation on certain portfolio securities, the holding period of such securities and the related tax rates, tax loss carryforward (if applicable) and other such factors. The amount and character of income and capital gain distributions to shareowners are determined in accordance with federal income tax rules, which may differ from U.S. GAAP. Distributions in excess of net investment income or net realized gains are temporary overdistributions for financial statement purposes resulting from differences in the recognition or classification of income or distributions for financial statement and tax purposes. Capital accounts within the financial statements are adjusted for permanent book/tax differences to reflect tax character, but are not adjusted for temporary differences. At August 31, 2017, the Fund reclassified $100,703 to decrease undistributed net investment income and $100,703 to increase accumulated net realized gain on investments to reflect permanent book/tax differences. These adjustments have no impact on the net assets or results of operations. During the year ended August 31, 2017, a capital loss carryforward of $6,514,026 was utilized to offset net realized gains by the Fund. The tax character of distributions paid during the years ended August 31, 2017 and August 31, 2016 was as follows: --------------------------------------------------------------------------- 2017 2016 --------------------------------------------------------------------------- Distributions paid from: Ordinary income $2,158,469 $1,409,013 --------------------------------------------------------------------------- Total $2,158,469 $1,409,013 =========================================================================== The following shows the components of distributable earnings on a federal income tax basis at August 31, 2017: --------------------------------------------------------------------------- 2017 --------------------------------------------------------------------------- Distributable earnings: Undistributed ordinary income $ 907,943 Undistributed long-term capital gain 7,412,886 Net unrealized appreciation 26,533,918 --------------------------------------------------------------------------- Total $34,854,747 =========================================================================== The difference between book basis and tax basis unrealized appreciation is attributable to the tax deferral of losses on wash sales, the mark to market of swaps and futures contracts and tax adjustments on partnerships. D. Fund Shares The Fund records sales and repurchases of its shares as of trade date. The Distributor earned $8,310 in underwriting commissions on the sale of Class A shares during the year ended August 31, 2017. Pioneer Global Equity Fund | Annual Report | 8/31/17 41 E. Foreign Currency Translation The books and records of the Fund are maintained in U.S. dollars. Amounts denominated in foreign currencies are translated into U.S. dollars using current exchange rates. Net realized gains and losses on foreign currency transactions, if any, represent, among other things, the net realized gains and losses on foreign currency contracts, disposition of foreign currencies and the difference between the amount of income accrued and the U.S. dollars actually received. Further, the effects of changes in foreign currency exchange rates on investments are not segregated in the Statement of Operations from the effects of changes in the market price of those securities, but are included with the net realized and unrealized gain or loss on investments. F. Class Allocations Income, common expenses and realized and unrealized gains and losses are calculated at the Fund level and allocated daily to each class of shares based on its respective percentage of adjusted net assets at the beginning of the day. Distribution fees are calculated based on the average daily net asset value attributable to Class A, Class C and Class R shares of the Fund, respectively (see Note 4). Class K and Class Y shares do not pay distribution fees. All expenses and fees paid to the Fund's transfer agent for its services are allocated among the classes of shares based on the number of accounts in each class and the ratable allocation of related out-of-pocket expenses (see Note 3). Distributions to shareowners are recorded as of the ex-dividend date. Distributions paid by the Fund with respect to each class of shares are calculated in the same manner and at the same time, except that net investment income dividends to Class A, Class C, Class K, Class R and Class Y shares can reflect different transfer agent and distribution expense rates. G. Risks Investing in foreign and/or emerging markets securities involves risks relating to interest rates, currency exchange rates and economic and political conditions. At times, the Fund's investments may represent industries or industry sectors that are interrelated or have common risks, making the Fund more susceptible to any economic, political, or regulatory developments or other risks affecting those industries and sectors. The Fund's prospectus contains unaudited information regarding the Fund's principal risks. Please refer to that document when considering the Fund's principal risks. 42 Pioneer Global Equity Fund | Annual Report | 8/31/17 H. Futures Contracts The Fund may enter into futures transactions in order to attempt to hedge against changes in interest rates, securities prices and currency rates or to seek to increase total return. Futures contracts are types of derivatives. All futures contracts entered into by the Fund are traded on a futures exchange. Upon entering into a futures contract, the Fund is required to deposit with a broker an amount of cash or securities equal to the minimum "initial margin" requirements of the associated futures exchange. The amount of cash deposited with the broker as collateral at August 31, 2017, was $110,000 and is recorded as "Futures collateral" in the Statement of Assets and Liabilities. Subsequent payments for futures contracts (variation margin) are paid or received by the Fund, depending on the daily fluctuation in the value of the contracts, and are recorded by the Fund as unrealized appreciation or depreciation. When the contract is closed, the Fund realizes a gain or loss equal to the difference between the opening and closing value of the contract as well as any fluctuation in foreign currency exchange rates where applicable. The use of futures contracts involves, to varying degrees, elements of market, interest rate, currency exchange rate and counterparty risks, which may exceed the amounts recognized by the Fund. Changes in value of the contracts may not directly correlate to the changes in value of the underlying securities. These risks may decrease the effectiveness of the Fund's hedging strategies and potentially result in a loss. The average value of contracts open during the year ended August 31, 2017, was $(1,009,294). Open futures contracts at August 31, 2017 are listed in the Schedule of Investments. I. Total Return Swap Agreements The Fund may enter into a total return swap to attempt to manage and/or gain exposure to a security or market. Pursuant to a total return swap agreement, the Fund negotiates with a counterparty to exchange a periodic stream of payments. One party makes payments based on the total return of a reference asset (such as a security or a basket of securities or securities index), and in return receives fixed or floating rate interest payments. The total return of the reference asset typically includes appreciation or depreciation on the reference asset, plus any interest or dividend payments. To the extent that the total return of the reference asset exceeds or falls short of the offsetting interest rate obligation, the Fund will receive a payment from or make a payment to the counterparty. Total return swap contracts are marked-to-market daily using valuations supplied by independent sources and the change in value, if any, is recorded as unrealized appreciation or depreciation in the Statement of Assets and Liabilities. Payments received or made are recorded as realized gains or losses Pioneer Global Equity Fund | Annual Report | 8/31/17 43 in the Statement of Operations. Total return swap contracts are subject to counterparty risk and unanticipated movements in value of exchange rates, interest rates, securities or the index. Open total return swap contracts at August 31, 2017 are listed at the end of the Schedule of Investments. The average value of swap contracts open during the year ended August 31, 2017 was $136,764. 2. Management Agreement The Adviser manages the Fund's portfolio. Management fees are calculated daily at the annual rate equal to 0.75% of the Fund's average daily net assets up to $500 million, 0.70% of the next $500 million of the Fund's average daily net assets and 0.65% of the Fund's average daily net assets over $1 billion. For the year ended August 31, 2017, the effective management fee (excluding waivers and/or assumption of expenses) was equivalent to 0.75% of the Fund's average daily net assets. The Adviser has contractually agreed to limit ordinary operating expenses (ordinary operating expenses means all fund expenses other than extraordinary expenses, such as litigation, taxes, brokerage commissions and acquired fund fees and expenses) of the Fund to the extent required to reduce Fund expenses to 1.25%, 2.15%, 0.80%, 1.55% and 0.80% of the average daily net assets attributable to Class A, Class C, Class K, Class R and Class Y shares, respectively. Prior to August 1, 2017 for, Class A and Class C shares, respectively, the Adviser had contractually agreed to limit ordinary operating expenses to 1.30% and 2.20%. Fees waived and expenses reimbursed during the year ended August 31, 2017, are reflected on the Statement of Operations. These expense limitations are in effect through January 1, 2019. There can be no assurance that the Adviser will extend the expense limitation agreement for a class of shares beyond the date referred to above. In addition, under the management and administration agreements, certain other services and costs, including accounting, regulatory reporting and insurance premiums, are paid by the Fund as administrative reimbursements. Included in "Due to affiliates" reflected on the Statement of Assets and Liabilities is $81,623 in management fees, administrative costs and certain other reimbursements payable to the Adviser at August 31, 2017. 3. Transfer Agent Boston Financial Data Services, Inc. serves as the transfer agent to the Fund at negotiated rates. Transfer agent fees and payables shown on the Statement of Operations and the Statement of Assets and Liabilities, respectively, include sub-transfer agent expenses incurred through the Fund's omnibus relationship contracts. 44 Pioneer Global Equity Fund | Annual Report | 8/31/17 In addition, the Fund reimbursed the transfer agent for out-of-pocket expenses incurred by the transfer agent related to shareholder communications activities such as proxy and statement mailings and outgoing phone calls. For the year ended August 31, 2017, such out-of-pocket expenses by class of shares were as follows: -------------------------------------------------------------------------------- Shareholder Communications: -------------------------------------------------------------------------------- Class A $52,060 Class C 6,109 Class K 100 Class R 631 Class Y 141 -------------------------------------------------------------------------------- Total: $59,041 ================================================================================ 4. Distribution Plan The Fund has adopted a distribution plan (the Plan) pursuant to Rule 12b-1 of the Investment Company Act of 1940 with respect to its Class A, Class C and Class R shares. Pursuant to the Plan, the Fund pays the Distributor 0.25% of the average daily net assets attributable to Class A shares as compensation for personal services and/or account maintenance services or distribution services with regard to Class A shares. Pursuant to the Plan, the Fund also pays the Distributor 1.00% of the average daily net assets attributable to Class C shares. The fee for Class C shares consists of a 0.25% service fee and a 0.75% distribution fee paid as compensation for personal services and/or account maintenance services or distribution services with regard to Class C shares. Pursuant to the Plan, the Fund further pays the Distributor 0.50% of the average daily net assets attributable to Class R shares held by such plans. Included in "Due to affiliates" reflected on the Statement of Assets and Liabilities is $9,860 in distribution fees payable to the Distributor at August 31, 2017. The Fund also has adopted a separate service plan for Class R shares (Service Plan). The Service Plan authorizes the Fund to pay securities dealers, plan administrators or other service organizations that agree to provide certain services to retirement plans or plan participants holding shares of the Fund a service fee of up to 0.25% of the Fund's average daily net assets attributable to Class R shares held by such plans. In addition, redemptions of each class of shares (except Class K, Class R and Class Y shares) may be subject to a contingent deferred sales charge (CDSC). A CDSC of 1.00% may be imposed on redemptions of certain net asset value purchases of Class A shares within 12 months of purchase. Redemptions of Class C shares within 12 months of purchase are subject to a CDSC of 1.00%, based on the lower of cost or market value of shares being redeemed. Shares Pioneer Global Equity Fund | Annual Report | 8/31/17 45 purchased as part of an exchange remain subject to any CDSC that applied to the original purchase of those shares. There is no CDSC for Class K, Class R and Class Y shares. Proceeds from the CDSCs are paid to the Distributor. For the year ended August 31, 2017, CDSCs in the amount of $1,428 were paid to the Distributor. 5. Line of Credit Facility The Fund, along with certain other funds in the Pioneer Family of Funds (the Funds), participates in a committed, unsecured revolving line of credit facility. Borrowings are used solely for temporary or emergency purposes. The Fund may borrow up to the lesser of the amount available under the facility or the limits set for borrowing by the Fund's prospectus and the 1940 Act. The credit facility in which the Fund participated until February 9, 2016 was in the amount of $240 million. The credit facility in which the Fund participated until February 7, 2017, was in the amount of $220 million. Effective February 8, 2017, the Fund participates in a facility that is in the amount of $25 million. Under such facility, depending on the type of loan, interest on borrowings is payable at the London Interbank Offered Rate (LIBOR) plus 0.90% on an annualized basis, or the Alternate Base Rate, which is the greater of (a) the facility's administrative agent's daily announced prime rate on the borrowing date, (b) 2% plus the Federal Funds Rate on the borrowing date or (c) 2% plus the overnight Eurodollar rate on the borrowing date. The Funds pay an annual commitment fee to participate in a credit facility. The commitment fee is allocated among participating Funds based on an allocation schedule set forth in the credit agreement. For the year ended August 31, 2017, the Fund had no borrowings under the credit facility. 6. Assets and Liabilities Offsetting The Fund has entered into an International Swaps and Derivatives Association, Inc. Master Agreement (ISDA Master Agreement) or similar agreement with substantially all its derivative counterparties. An ISDA Master Agreement is a bilateral agreement between the Fund and a counterparty that governs the trading of certain OTC derivatives and typically contains, among other things, close-out and set-off provisions which apply upon the occurrence of an event of default and/or a termination event as defined under the relevant ISDA Master Agreement. The ISDA Master Agreement may also give a party the right to terminate all transactions traded under such agreement if, among other things, there is deterioration in the credit quality of the other party. Upon an event of default or a termination of the ISDA Master Agreement, the non-defaulting party has the right to close out all transactions under such agreement and to net amounts owed under each transaction to determine one net amount payable by one party to the other. The right to close out and net payments across all transactions under the ISDA Master Agreement could result in a reduction of the Fund's credit risk to its counterparty equal to any 46 Pioneer Global Equity Fund | Annual Report | 8/31/17 amounts payable by the Fund under the applicable transactions, if any. However, the Fund's right to setoff may be restricted or prohibited by the bankruptcy or insolvency laws of the particular jurisdiction to which a specific ISDA counterparty is subject. The collateral requirements for derivatives transactions under an ISDA Master Agreement are governed by a credit support annex to the ISDA Master Agreement. Collateral requirements are generally determined at the close of business each day and are typically based on changes in market values for each transaction under an ISDA Master Agreement and netted into one amount for such agreement. Generally, the amount of collateral due from or to a counterparty is subject to threshold (a minimum transfer amount) before a transfer is required, which may vary by counterparty. Collateral pledged for the benefit of the Fund and/or counterparty is held in segregated accounts by the Fund's custodian and cannot be sold, re-pledged, assigned or otherwise used while pledged. Cash that has been segregated to cover the Fund's collateral obligations, if any, will be reported separately in the Statement of Assets and Liabilities as "Futures collateral." Securities pledged by the Fund as collateral, if any, are identified as such in the Schedule of Investments. Financial instruments subject to an enforceable master netting agreement such as an ISDA Master Agreement have been offset on the Statement of Assets and Liabilities. The following charts show gross assets and liabilities of the Fund as of August 31, 2017. --------------------------------------------------------------------------------------------------------- Derivative Assets Derivatives Non-Cash Cash Net Amount Subject to Master Available for Collateral Collateral of Derivative Counterparty Netting Agreement Offset Received (a) Received (a) Assets (b) --------------------------------------------------------------------------------------------------------- Societe Generale SA $26,774 $-- $-- $-- $26,774 --------------------------------------------------------------------------------------------------------- Total $26,774 $-- $-- $-- $26,774 ========================================================================================================= --------------------------------------------------------------------------------------------------------- Derivative Liabilities Derivatives Non-Cash Cash Net Amount Subject to Master Available for Collateral Collateral of Derivative Counterparty Netting Agreement Offset Pledged (a) Pledged (a) Liabilities (c) --------------------------------------------------------------------------------------------------------- Societe Generale SA $-- $-- $-- $-- $-- --------------------------------------------------------------------------------------------------------- Total $-- $-- $-- $-- $-- ========================================================================================================= (a) The amount presented here may be less than the total amount of collateral received/pledged, as the net amount of derivative assets and liabilities cannot be less than $0. (b) Represents the net amount due from the counterparty in the event of default. (c) Represents the net amount payable to the counterparty in the event of default. Pioneer Global Equity Fund | Annual Report | 8/31/17 47 7. Additional Disclosures about Derivative Instruments and Hedging Activities The Fund's use of derivatives may subject it to the following risks: Interest rate risk relates to the fluctuations in the value of interest-bearing securities due to changes in the prevailing levels of market interest rates. Credit risk relates to the ability of the issuer of a financial instrument to make further principal or interest payments on an obligation or commitment that it has to the Fund. Foreign exchange rate risk relates to fluctuations in the value of an asset or liability due to changes in currency exchange rates. Equity risk relates to the fluctuations in the value of financial instruments as a result of changes in market prices (other than those arising from interest rate risk or foreign exchange risk), whether caused by factors specific to an individual investment, its issuer, or all factors affecting all instruments traded in a market or market segment. Commodity risk relates to the risk that the value of a commodity or commodity index will fluctuate based on increases or decreases in the commodities market and factors specific to a particular industry or commodity. The effect of derivative instruments (not considered to be hedging instruments for accounting disclosure purposes) on the Statement of Assets and Liabilities by risk exposure at August 31, 2017, was as follows: -------------------------------------------------------------------------------- Statement of Foreign Assets and Interest Credit Exchange Equity Commodity Liabilities Rate Risk Risk Rate Risk Risk Risk -------------------------------------------------------------------------------- Assets Unrealized appreciation on total return swap agreements $-- $-- $-- $26,774 $-- -------------------------------------------------------------------------------- Total Value $-- $-- $-- $26,774 $-- ================================================================================ Liabilities Unrealized depreciation on open futures contracts* $-- $-- $70,336 $-- $-- -------------------------------------------------------------------------------- Total Value $-- $-- $70,336 $-- $-- ================================================================================ * Reflects unrealized appreciation/depreciation of futures contracts (see Note 1H). The current day's variation margin is disclosed on the Statement of Assets and Liabilities. 48 Pioneer Global Equity Fund | Annual Report | 8/31/17 The effect of derivative instruments (not considered to be hedging instruments for accounting disclosure purposes) on the Statement of Operations by risk exposure at August 31, 2017, was as follows: ---------------------------------------------------------------------------------- Foreign Statement of Interest Credit Exchange Equity Commodity Operations Rate Risk Risk Rate Risk Risk Risk ---------------------------------------------------------------------------------- Net realized gain (loss) on: Futures contracts $-- $-- $39,667 $ (212,388) $-- Swap contracts -- -- -- 1,639,855 -- ---------------------------------------------------------------------------------- Total Value $-- $-- $39,667 $1,427,467 $-- ================================================================================== ---------------------------------------------------------------------------------- Foreign Statement of Interest Credit Exchange Equity Commodity Operations Rate Risk Risk Rate Risk Risk Risk ---------------------------------------------------------------------------------- Change in net unrealized appreciation (depreciation) on Futures contracts $-- $-- $(70,336) $ -- $-- Swap contracts -- -- -- 26,774 -- ---------------------------------------------------------------------------------- Total Value $-- $-- $(70,336) $ 26,774 $-- ================================================================================== 8. Results of Shareholder Meeting At a special meeting held on June 13, 2017, shareholders of the Fund were asked to consider the proposals described below. A report of the total votes cast by the Fund's shareholders (or, with respect to Proposal 2, by shareholders of Pioneer Series Trust V, as noted below) follows: ------------------------------------------------------------------------------------- For Against Abstain Broker Non-Votes ------------------------------------------------------------------------------------- Proposal 1 - To approve 6,767,569.098 80,524.013 149,059.950 1,375,826.451 an New Management Agreement with the Adviser -------------------------------------------------------------------------------- For Withhold -------------------------------------------------------------------------------- Proposal 2 - To elect Trustees* -------------------------------------------------------------------------------- David R. Bock 52,906,413.845 1,033,842.093 -------------------------------------------------------------------------------- Benjamin M. Friedman 52,887,736.342 1,052,519.596 -------------------------------------------------------------------------------- Margaret B.W. Graham 52,932,507.056 1,007,748.882 -------------------------------------------------------------------------------- Lisa M. Jones 52,966,747.756 973,508.182 -------------------------------------------------------------------------------- Lorraine H. Monchak 52,946,675.492 993,580.446 -------------------------------------------------------------------------------- Thomas J. Perna 52,911,994.971 1,028,260.967 -------------------------------------------------------------------------------- Marguerite A. Piret 52,949,595.338 990,660.600 -------------------------------------------------------------------------------- Fred J. Ricciardi 52,895,139.856 1,045,116.082 -------------------------------------------------------------------------------- Kenneth J. Taubes 52,940,075.518 1,000,180.420 -------------------------------------------------------------------------------- * Proposal 2 was voted on and approved by all series of Pioneer Series Trust V. Results reported above reflect the combined votes of all series of the Trust. Pioneer Global Equity Fund | Annual Report | 8/31/17 49 Report of Independent Registered Public Accounting Firm To the Board of Trustees of Pioneer Series Trust V and the Shareholders of Pioneer Global Equity Fund: -------------------------------------------------------------------------------- We have audited the accompanying statement of assets and liabilities of Pioneer Global Equity Fund (the "Fund"), one of the funds constituting Pioneer Series Trust V (the "Trust"), including the schedule of investments, as of August 31, 2017, and the related statements of operations, changes in net assets and the financial highlights for the year then ended and the financial highlights for the year ended August 31, 2013. These financial statements and financial highlights are the responsibility of the Fund's management. Our responsibility is to express an opinion on these financial statements and financial highlights based on our audits. The statement of changes in net assets for the year ended August 31, 2016 and the financial highlights in the periods ended August 31, 2014, August 31, 2015 and August 31, 2016 were audited by another independent registered public accounting firm whose report, dated October 24, 2016, expressed an unqualified opinion on the statement of changes in net assets and those financial highlights. We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements and financial highlights are free of material misstatement. We were not engaged to perform an audit of the Fund's internal control over financial reporting. Our audit included consideration of internal control over financial reporting as a basis for designing audit procedures that are appropriate in the circumstances, but not for the purpose of expressing an opinion on the effectiveness of the Fund's internal control over financial reporting. Accordingly, we express no such opinion. An audit also includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements and financial highlights, assessing the accounting principles used and significant estimates made by management, and evaluating the overall financial statement presentation. Our procedures included confirmation of securities owned as of August 31, 2017, by correspondence with the custodian, brokers and others or by other appropriate auditing procedures where replies from brokers and others were not received. We believe that our audits provide a reasonable basis for our opinion. In our opinion, the financial statements and financial highlights referred to above present fairly, in all material respects, the financial position of Pioneer Global Equity Fund at August 31, 2017, the results of its operations, the changes in its net assets and the financial highlights for the year then ended and the financial highlights for the year ended August 31, 2013 in conformity with U.S. generally accepted accounting principles. /s/ Ernst & Young LLP Boston, Massachusetts October 27, 2017 50 Pioneer Global Equity Fund | Annual Report | 8/31/17 Additional Information (unaudited) For the year ended August 31, 2017, certain dividends paid by the Fund may be subject to a maximum tax rate of 15%, as provided for by the Jobs and Growth Tax Relief Reconciliation Act (the Act) of 2003. The Fund intends to designate up to the maximum amount of such dividends allowable under the Act, as taxed at a maximum rate of 15%. Complete information will be computed and reported in conjunction with your 2017 form 1099-DIV. The qualifying percentage of the Fund's ordinary income dividends for the purpose of the corporate dividends received deduction was 59.24%. The Board of Trustees of Pioneer Emerging Markets Fund has approved the reorganization of the fund with and into Pioneer Global Equity Fund (the "Reorganization"). Each fund is managed by Amundi Pioneer Asset Management, Inc. ("Amundi Pioneer"). The Reorganization, which does not require shareholder approval, is subject to the satisfaction of certain conditions, and is expected to be completed in the fourth quarter of 2017. Change in Independent Registered Public Accounting Firm Prior to July 3, 2017 Pioneer Investment Management, Inc. (the "Adviser"), the Fund's investment adviser, was an indirect, wholly owned subsidiary of UniCredit S.p.A. ("UniCredit"). On that date, UniCredit completed the sale of its Pioneer Investments business, which includes the Adviser, to Amundi (the "Transaction"). As a result of the Transaction, the Adviser became an indirect, wholly-owned subsidiary of Amundi. Amundi is controlled by Credit Agricole S.A. Amundi is headquartered in Paris, France, and, as of September 30, 2016, had more than $1.1 trillion in assets under management worldwide. Deloitte & Touche LLP ("D&T"), the Fund's previous independent registered public accounting firm, informed the Audit Committee and the Board that it would no longer be independent with respect to the Fund upon the completion of the Transaction as a result of certain services being provided to Amundi and Credit Agricole, and, accordingly, that it intended to resign as the Fund's independent registered public accounting firm upon the completion of the Transaction. D&T's resignation was effective on July 3, 2017, when the Transaction was completed. During the periods as to which D&T has served as the Fund's independent registered public accounting firm, including the Fund's two most recent fiscal years preceding the fiscal year ended August 31, 2017, D&T's reports on the Fund's financial statements have not contained an adverse opinion or disclaimer of opinion and have not been qualified or modified as to uncertainty, audit scope or accounting principles. Further, there have been no disagreements with D&T on any matter of accounting principles or practices, financial statement disclosure, or auditing scope or procedure, which, if not resolved to the satisfaction of D&T, would have caused D&T to make reference to the subject matter of the Pioneer Global Equity Fund | Annual Report | 8/31/17 51 disagreement in connection with its report on the financial statements. In addition, there have been no reportable events of the kind described in Item 304(a)(1)(v) of Regulation S-K under the Securities Exchange Act of 1934. Effective immediately following the completion of the Transaction on July 3, 2017, the Board, acting upon the recommendation of the Audit Committee, engaged a new independent registered public accounting firm, Ernst & Young LLP ("EY"), for the Fund's fiscal year ended August 31, 2017. Prior to its engagement, EY had advised the Fund's Audit Committee that EY had identified the following matters, in each case relating to services rendered by other member firms of Ernst & Young Global Limited, all of which are located outside the United States, to UniCredit and certain of its subsidiaries during the period commencing July 1, 2016, that it determined to be inconsistent with the auditor independence rules set forth by the Securities and Exchange Commission ("SEC"): (a) project management support services to UniCredit in the Czech Republic, Germany, Italy, Serbia and Slovenia in relation to twenty-two projects, that were determined to be inconsistent with Rule 2-01(c)(4)(vi) of Regulation S-X (management functions); (b) two engagements for UniCredit in Italy where fees were contingent/success based and that were determined to be inconsistent with Rule 2-01(c)(5) of Regulation S-X (contingent fees); (c) four engagements where legal and expert services were provided to UniCredit in the Czech Republic and Germany, and twenty engagements where the legal advisory services were provided to UniCredit in Austria, Czech Republic, Italy and Poland, that were determined to be inconsistent with Rule 2-01(c)(4)(ix) and (x) of Regulation S-X (legal and expert services); and (d) two engagements for UniCredit in Italy involving assistance in the sale of certain assets, that were determined to be inconsistent with Rule 2-01(c)(4)(viii) of Regulation S-X (broker-dealer, investment advisor or investment banking services). None of the foregoing services involved the Fund, any of the other funds in the Pioneer Family of Funds or any other Pioneer entity sold by UniCredit in the Transaction. EY advised the Audit Committee that it had considered the matters described above and had concluded that such matters would not impair EY's ability to exercise objective and impartial judgment in connection with the audits of the financial statements of the Fund under the SEC and Public Company Accounting Oversight Board independence rules, and that a reasonable investor with knowledge of all relevant facts and circumstances would reach the same conclusion. Management and the Audit Committee considered these matters and discussed the matters with EY and, based upon EY's description of the matters and statements made by EY, Management and the Audit Committee believe that EY will be capable of exercising objective and impartial judgment in connection with the audits of the financial statements of the Fund, and Management further believes that a reasonable investor with knowledge of all relevant facts and circumstances would reach the same conclusion. 52 Pioneer Global Equity Fund | Annual Report | 8/31/17 Approval of New and Interim Management Agreements Amundi Pioneer Asset Management, Inc. (Amundi Pioneer), formerly Pioneer Investment Management, Inc., serves as the investment adviser to Pioneer Global Equity Fund (the Fund) pursuant to an investment management agreement between Amundi Pioneer and the Fund. On July 3, 2017, Amundi acquired Pioneer Investments, a group of asset management companies located throughout the world (the "Transaction"). As a result of the Transaction, Amundi Pioneer became an indirect wholly-owned subsidiary of Amundi and Amundi's wholly-owned subsidiary, Amundi USA, Inc. Prior to July 3, 2017, Pioneer Investments was owned by Pioneer Global Asset Management S.p.A. ("PGAM"), a wholly-owned subsidiary of UniCredit S.p.A. ("UniCredit"). Under the Investment Company Act of 1940, the Fund's current investment management agreement (the "Current Management Agreement") terminated automatically upon the consummation of the Transaction. In order for Amundi Pioneer to continue to manage the Fund after the consummation of the Transaction, the Trustees and shareholders of the Fund were required to approve a new investment management agreement for the Fund (the "New Management Agreement"). As discussed below, the Board of Trustees of the Fund approved the New Management Agreement at a meeting held on March 6-7, 2017. The New Management Agreement was approved by the shareholders of the Fund at a meeting held on June 13, 2017. The Board of Trustees of the Fund also approved an interim investment management agreement between Amundi Pioneer and the Fund (the "Interim Management Agreement") at the March 6-7, 2017 meeting. The Interim Management Agreement would have taken effect upon the closing of the Transaction in the event that the shareholders of the Fund did not approve the New Management Agreement. Board Evaluation of the New and Interim Management Agreements The Board evaluated the Transaction and the New Management Agreement and Interim Management Agreement for the Fund. In connection with their evaluation of the Transaction and the New Management Agreement for the Fund, the Trustees requested such information as they deemed reasonably necessary, including: (a) the structure of the Transaction and the strategy underlying the Transaction; (b) the anticipated benefits of the Transaction to the Fund and its shareholders; (c) the post-Transaction plans for Amundi Pioneer, including Amundi's plans for integration of Pioneer Investments and Amundi Pioneer with its existing asset management businesses and plans for the future development of Amundi Pioneer; (d) the effect of the Transaction on the ongoing services provided to the Fund, including the need to select a new independent registered public accounting firm for the Fund, and any Pioneer Global Equity Fund | Annual Report | 8/31/17 53 plans to modify the operations of the Fund; (e) the stability and continuity of Amundi Pioneer's management and key employees, including compensation and benefits to Amundi Pioneer's key employees, and retention plans and incentive plan structure; (f) the post-Transaction indebtedness and financial resources of Amundi Pioneer; (g) Amundi's legal and operational structure, its principal shareholders and senior management, its investment management, risk management, administrative, legal and compliance functions; (h) certain regulatory matters relating to Amundi's affiliates; and (i) Amundi's commitment to the United States, including the role of Amundi Pioneer in the larger Amundi business. The Trustees also requested and obtained the following information in connection with their evaluation of the Transaction and the New Management Agreement for the Fund: (i) memoranda provided by Fund counsel that summarized the legal standards and other considerations that are relevant to the Trustees in their deliberations regarding the New Management Agreement; (ii) the qualifications of the investment management teams for the Fund, as well as the level of investment by the Fund's portfolio managers in the Fund; (iii) the Fund's management fees and total expense ratios, the financial statements of Amundi Pioneer and its pre- and post-Transaction parent companies, profitability analyses from Amundi Pioneer, and analyses from Amundi Pioneer as to possible economies of scale; (iv) the profitability of the institutional business of Amundi Pioneer and Amundi Pioneer's affiliate, Amundi Pioneer Institutional Asset Management, Inc. ("Amundi Pioneer Institutional") as compared to that of Amundi Pioneer's fund management business; and (v) the differences between the fees and expenses of the Fund and the fees and expenses of Amundi Pioneer's and Amundi Pioneer Institutional's institutional accounts, as well as the different services provided by Adviser to the Fund and by Amundi Pioneer and Amundi Pioneer Institutional to the institutional accounts. In addition, the Trustees considered the information provided at regularly scheduled meetings throughout the year regarding the Fund's performance and risk attributes, including through meetings with investment management personnel, and took into account other information related to the Fund provided to the Trustees at regularly scheduled meetings. The Trustees also considered information they had received in their review of the continuance of the Current Management Agreement for the Fund in September 2016. At meetings held on January 9, 2017 and January 10, 2017, the Trustees met with representatives of Amundi and PGAM, including separate meetings of the Trustees who are not "interested persons" of the Fund Complex ("Independent Trustees") and counsel with representatives of Amundi and PGAM, and subsequently with representatives of Amundi. In those meetings, they received an extensive presentation from the representatives of Amundi, including the chief executive officer of Amundi, describing Amundi's 54 Pioneer Global Equity Fund | Annual Report | 8/31/17 background and history, its global asset management activities, the growth of its business, and its status as the largest asset management firm in Europe and one of the largest globally; its capital structure and financial resources, including information as to the financing of the Transaction; its principal investors, including its majority investor Credit Agricole S.A., and Credit Agricole's long-term commitment to the asset management business; the philosophy and strategy underlying the Transaction and the complementarity of Amundi's and Pioneer Investments' respective asset management businesses; Amundi's various operating and investment committees and how they would likely interact with Amundi Pioneer; the proposed integration process, including the progress to date and the establishment of various integration work streams; Amundi's plans for management of Amundi Pioneer; Amundi's philosophy as to compensation of key employees and its general intentions with respect to incentive plans for key employees of Amundi Pioneer; Amundi's preliminary plans to achieve cost and other synergies; and opportunities to further develop the business of Amundi Pioneer and Amundi Pioneer Institutional, including in the area of institutional asset management, and how that would benefit shareholders of the Pioneer Funds. In those meetings, the representatives of Amundi confirmed their intention that the Chief Executive Officer and Chief Investment Officer of Amundi Pioneer would remain in their current positions, and confirmed that they do not currently foresee major changes in the day-to-day investment management operations of Amundi Pioneer with respect to the Fund as a direct result of the Transaction. They discussed incentive arrangements for key personnel that would continue after the closing of the Transaction and their plans to establish a new long-term incentive plan following the closing. They also generally discussed ways in which Amundi Pioneer could potentially draw on the expanded global resources of Amundi post-Transaction. At those meetings, the Independent Trustees identified certain areas to which they requested further information, including as to trading and execution of securities transactions, research and portfolio management and potential changes in investment process, particularly where asset classes managed by Amundi Pioneer would overlap with asset classes managed by Amundi, the continued availability of resources currently at Pioneer Investments or elsewhere within Amundi to assist in management of certain Funds, and any anticipated significant changes in operations. The Independent Trustees considered the uncertainty as to whether the Fund's independent registered public accounting firm could continue to act in that capacity after the closing of the Transaction. The Independent Trustees also met with counsel to review the information they had received to date and to discuss next steps. Pioneer Global Equity Fund | Annual Report | 8/31/17 55 Subsequently, the Trustees received further information from Amundi, including written responses to questions raised by the Independent Trustees, and received from Amundi Pioneer the information requested of it. The Independent Trustees reviewed the information provided with counsel at telephonic meetings held on February 16, 2017 and February 27, 2017. The Trustees held a special in-person Board meeting on March 6-7, 2017 for further consideration of the New Management Agreements, the Interim Management Agreements and the Transaction. The Trustees met again with senior executives of Amundi at the March 6-7, 2017 meeting. At the March 6-7, 2017 meeting, based on their evaluation of the information provided by Amundi Pioneer and Amundi, the Trustees including the Independent Trustees voting separately, approved the New Management Agreement and the Interim Management Agreement for the Fund. In considering the New Management Agreement for the Fund, the Trustees considered various factors that they determined were relevant, including the factors described below. The Trustees did not identify any single factor as the controlling factor in their determinations. The Trustees considered the same factors with respect to the Interim Management Agreement for the Fund. Nature, Extent and Quality of Services The Trustees considered the nature, extent and quality of the services that had been provided by Amundi Pioneer to the Fund and that are expected to be provided by Amundi Pioneer to the Fund following the consummation of the Transaction. The Trustees reviewed the terms of the New Management Agreement, and noted that such terms are substantially similar to the terms of the Current Management Agreement, except for different execution dates, effective dates and termination dates. The Trustees reviewed Amundi Pioneer's investment approach for the Fund and its research process. The Trustees considered the resources of Amundi Pioneer and the personnel of Amundi Pioneer who provide investment management services to the Fund. They also reviewed the amount of non-investment resources and personnel of Amundi Pioneer that are involved in Amundi Pioneer's services to the Fund, including Amundi Pioneer's compliance and legal resources and personnel. The Trustees noted the substantial attention and high priority given by Amundi Pioneer's senior management to the Pioneer Fund complex. The Trustees considered that Amundi Pioneer supervises and monitors the performance of the Fund's service providers and provides the Fund with personnel (including Fund officers) and other resources that are necessary for the Fund's business management and operations and that Amundi Pioneer would continue to provide those investment management and research services and resources to the Fund following the consummation of the Transaction. The Trustees also considered that, as administrator, Amundi 56 Pioneer Global Equity Fund | Annual Report | 8/31/17 Pioneer would continue to be responsible for the administration of the Fund's business and other affairs. The Trustees considered the fees to be paid to Amundi Pioneer for the provision of administration services. The Trustees considered that Deloitte & Touche LLP informed the Board that it would no longer be independent with respect to the Fund upon the completion of the Transaction and, accordingly, that it would be necessary for the Board to engage a new independent registered public accounting firm for the Fund. The Trustees considered that the Transaction was not expected to have a material adverse impact on the nature, scope and overall quality of services provided to the Fund and its shareholders, including investment management, risk management, administrative, compliance, legal and other services, as a result of the Transaction. In that regard, the Trustees considered that Amundi is one of the largest asset managers globally, and that Amundi Pioneer may have access to additional research and portfolio management capabilities as a result of the Transaction and that Amundi Pioneer, as part of Amundi, is expected to have an enhanced global presence that may contribute to an increase in the overall scale and resources of Amundi Pioneer. Furthermore, in considering whether the Transaction would be expected to have a material adverse impact on the nature, scope and overall quality of services provided to the Fund and its shareholders, the Trustees considered the statements by representatives of Amundi that they expect the Chief Executive Officer and Chief Investment Officer of Amundi Pioneer to remain in their current positions and that they do not currently foresee major changes in the day-to-day investment management operations of Amundi Pioneer as a direct result of the Transaction, or the risk management, legal or compliance services provided by Amundi Pioneer, with respect to the Fund. They further considered the current incentive arrangements for key personnel of Amundi Pioneer that would continue after the closing of the Transaction. They also noted Amundi's stated intention to establish a new long-term incentive plan following the closing. The Trustees also took into account their experience in evaluating the proposed combination of Pioneer Investments and Santander Asset Management, which was announced in September, 2014 and abandoned in July, 2016. In light of, among other things, this experience, the Trustees determined that they were not able to identify any realistic alternatives to approving the New Management Agreement that would provide the level of services to the Fund and its shareholders that are expected to be provided by Amundi Pioneer after the closing of the Transaction. Based on these considerations, the Trustees concluded that the nature, extent and quality of services that Amundi Pioneer would continue to provide to the Fund under the New Management Agreement would be satisfactory and consistent with the terms of the New Management Agreement. Pioneer Global Equity Fund | Annual Report | 8/31/17 57 Performance of the Fund In considering the Fund's performance, the Trustees regularly reviewed and discussed throughout the year data prepared by Amundi Pioneer and information comparing the Fund's performance with the performance of its peer group of funds, as classified by each of Morningstar, Inc. (Morningstar) and Lipper, and the performance of the Fund's benchmark index. They also discussed the Fund's performance with Amundi Pioneer on a regular basis. The Trustees' regular reviews and discussions were factored into the Trustees' deliberations concerning the approval of the New Management Agreement. Management Fee and Expenses The Trustees noted that the stated management fees to be paid by the Fund are identical under the Current Management Agreement and the New Management Agreement. The Trustees considered information showing the fees and expenses of the Fund in comparison to the management fees and expense ratios of its peer group of funds as classified by Morningstar and also to the expense ratios of a peer group of funds selected on the basis of criteria determined by the Independent Trustees for this purpose using data provided by Strategic Insight Mutual Fund Research and Consulting, LLC (Strategic Insight), an independent third party. In all quintile rankings referred to below, first quintile is most favorable to the Fund's shareowners. To the extent applicable, the Trustees also considered the impact of transfer agency, sub-transfer agency, and other non-management fee expenses on the expense ratios of the Fund. The Trustees noted that they separately review the Fund's transfer agency, sub-transfer agency and intermediary arrangements and that the results of the most recent such review were considered in the consideration of the Fund's expense ratio. The Trustees considered that the Fund's management fee as of September 30, 2016 was in the second quintile relative to the management fees paid by other funds in its Morningstar category for the comparable period. The Trustees also considered the breakpoints in the management fee schedule and the reduced fee rates above certain asset levels. The Trustees considered that the expense ratio of the Fund's Class A shares as of September 30, 2016 was in the third quintile relative to its Morningstar category and in the second quintile relative to its Strategic Insight peer group, in each case for the comparable period. The Trustees noted that Amundi Pioneer had agreed to waive fees and/or reimburse expenses in order to limit the ordinary operating expenses of the Fund. The Trustees reviewed management fees charged by Amundi Pioneer and Amundi Pioneer Institutional to institutional and other clients, including publicly offered European funds sponsored by Amundi Pioneer's affiliates, unaffiliated U.S. registered investment companies (in a sub-advisory capacity), and unaffiliated foreign and domestic separate accounts. The Trustees also 58 Pioneer Global Equity Fund | Annual Report | 8/31/17 considered Amundi Pioneer's costs in providing services to the Fund and Amundi Pioneer's and Amundi Pioneer Institutional's costs in providing services to the other clients and considered the differences in management fees and profit margins for fund and non-fund services. In evaluating the fees associated with Amundi Pioneer's and Amundi Pioneer Institutional's client accounts, the Trustees took into account the respective demands, resources and complexity associated with the Fund and other client accounts. The Trustees noted that in some instances the fee rates for those clients were lower than the management fee for the Fund and considered that, under both the Current Management Agreement and the New Management Agreement, Amundi Pioneer would perform additional services for the Fund that it does not provide to those other clients or services that are broader in scope, including oversight of the Fund's other service providers and activities related to compliance and the extensive regulatory and tax regimes to which the Fund is subject. The Trustees also considered the different risks associated with Amundi Pioneer's management of the Fund and Amundi Pioneer's and Amundi Pioneer Institutional's management of the other client accounts. The Trustees concluded that the management fee payable by the Fund to Amundi Pioneer was reasonable in relation to the nature and quality of the services to be provided by Amundi Pioneer. Profitability The Trustees considered information provided by Amundi Pioneer regarding the profitability of Amundi Pioneer with respect to the advisory services provided by Amundi Pioneer to the Fund, including the methodology used by Amundi Pioneer in allocating certain of its costs to the management of the Fund. The Trustees also considered Amundi Pioneer's profit margin in connection with the overall operation of the Fund. They further reviewed the financial results, including the profit margins, realized by Amundi Pioneer and Amundi Pioneer Institutional from non-fund businesses. The Trustees considered Amundi Pioneer's profit margins with respect to the Fund in comparison to the limited industry data available and noted that the profitability of any adviser was affected by numerous factors, including its organizational structure and method for allocating expenses. The Trustees concluded that Amundi Pioneer's profitability with respect to the management of the Fund was not unreasonable. Economies of Scale The Trustees considered Amundi Pioneer's views relating to economies of scale in connection with the Pioneer Funds as fund assets grow and the extent to which any such economies of scale are shared with the Fund and Fund shareholders. The Trustees recognize that economies of scale are difficult to identify and quantify, and that, among other factors that may be relevant, are Pioneer Global Equity Fund | Annual Report | 8/31/17 59 the following: fee levels, expense subsidization, investment by Amundi Pioneer in research and analytical capabilities and Amundi Pioneer's commitment and resource allocation to the Fund. The Trustees noted that profitability also may be an indicator of the availability of any economies of scale, although profitability may vary for other reasons including due to reductions in expenses. The Trustees concluded that economies of scale, if any, were being appropriately shared with the Fund. Other Benefits The Trustees considered the other benefits that Amundi Pioneer enjoys from its relationship with the Fund. The Trustees considered the character and amount of fees paid or to be paid by the Fund, other than under the Current Management Agreement or the New Management Agreement, for services provided by Amundi Pioneer and its affiliates. The Trustees further considered the revenues and profitability of Amundi Pioneer's businesses other than the Fund business. To the extent applicable, the Trustees also considered the benefits to the Fund and to Amundi Pioneer and its affiliates from the use of "soft" commission dollars generated by the Fund to pay for research and brokerage services. The Trustees considered that following the completion of the Transaction, Amundi Pioneer will be the principal U.S. asset management business of Amundi, and that Amundi's worldwide asset management business will manage over $1.38 trillion in assets (including the Pioneer Funds). This may create opportunities for Amundi Pioneer, Amundi Pioneer Institutional and Amundi that derive from Amundi Pioneer's relationships with the Fund, including Amundi's ability to market the services of Amundi Pioneer globally. The Trustees noted that Amundi Pioneer may have access to additional research capabilities as a result of the Transaction and Amundi's enhanced global presence that may contribute to an increase of the overall scale of Amundi Pioneer. The Trustees considered that Amundi Pioneer and the Fund are expected to receive reciprocal intangible benefits from the relationship, including mutual brand recognition and, for the Fund, direct and indirect access to the resources of a large global asset manager. The Trustees concluded that any such benefits received by Amundi Pioneer as a result of its relationship with the Fund were reasonable. Conclusion After consideration of the factors described above as well as other factors, the Trustees, including the Independent Trustees, concluded that the New Management Agreement and the Interim Management Agreement for the Fund, including the fees payable thereunder, were fair and reasonable and voted to approve the New Management Agreement and the Interim Management Agreement, and to recommend that shareholders approve the New Management Agreement. 60 Pioneer Global Equity Fund | Annual Report | 8/31/17 Trustees, Officers and Service Providers Investment Adviser Amundi Pioneer Asset Management, Inc. Custodian and Sub-Administrator Brown Brothers Harriman & Co. Independent Registered Public Accounting Firm Ernst & Young LLP Principal Underwriter Amundi Pioneer Distributor, Inc. Legal Counsel Morgan, Lewis & Bockius LLP Shareowner Services and Transfer Agent Boston Financial Data Services, Inc. Proxy Voting Policies and Procedures of the Fund are available without charge, upon request, by calling our toll free number (1-800-225-6292). Information regarding how the Fund voted proxies relating to portfolio securities during the most recent 12-month period ended June 30 is publicly available to shareowners at www.amundipioneer.com. This information is also available on the Securities and Exchange Commission's web site at www.sec.gov. Trustees and Officers The Fund's Trustees and officers are listed below, together with their principal occupations and other directorships they have held during at least the past five years. Trustees who are interested persons of the Fund within the meaning of the 1940 Act are referred to as Interested Trustees. Trustees who are not interested persons of the Fund are referred to as Independent Trustees. Each of the Trustees serves as a Trustee of each of the 46 U.S. registered investment portfolios for which Amundi Pioneer serves as investment adviser (the "Pioneer Funds"). The address for all Trustees and all officers of the Fund is 60 State Street, Boston, Massachusetts 02109. The Statement of Additional Information of the Fund includes additional information about the Trustees and is available, without charge, upon request, by calling 1-800-225-6292. Pioneer Global Equity Fund | Annual Report | 8/31/17 61 Independent Trustees ------------------------------------------------------------------------------------------------------------------------------------ Name, Age and Position Term of Office and Other Directorships Held With the Fund Length of Service Principal Occupation Held by Trustee ------------------------------------------------------------------------------------------------------------------------------------ Thomas J. Perna (66) Trustee since 2006. Private investor (2004 - 2008 and 2013 - Director, Broadridge Financial Chairman of the Board Serves until a present); Chairman (2008 - 2013) and Chief Solutions, Inc. (investor and Trustee successor trustee is Executive Officer (2008 - 2012), Quadriserv, communications and securities elected or earlier Inc. (technology products for securities processing provider for financial retirement or removal. lending industry); and Senior Executive Vice services industry) (2009 - President, The Bank of New York (financial and present); Director, Quadriserv, securities services) (1986 - 2004) Inc. (2005 - 2013); and Commissioner, New Jersey State Civil Service Commission (2011 - 2015) ------------------------------------------------------------------------------------------------------------------------------------ David R. Bock (73) Trustee since 2005. Managing Partner, Federal City Capital Advisors Director of New York Mortgage Trustee Serves until a (corporate advisory services company) (1997 - Trust (publicly-traded mortgage successor trustee is 2004 and 2008 - present); Interim Chief REIT) (2004 - 2009, 2012 - elected or earlier Executive Officer, Oxford Analytica, Inc. present); Director of The Swiss retirement or removal. (privately held research and consulting Helvetia Fund, Inc. (closed-end company) (2010); Executive Vice President and fund) (2010 - present); Director Chief Financial Officer, I-trax, Inc. (publicly of Oxford Analytica, Inc. (2008 - traded health care services company) (2004 - present); and Director of 2007); and Executive Vice President and Chief Enterprise Community Investment, Financial Officer, Pedestal Inc. Inc. (privately-held affordable (internet-based mortgage trading company) (2000 housing finance company) (1985 - - 2002); Private Consultant (1995 - 1997); 2010) Managing Director, Lehman Brothers (1992 - 1995); Executive, The World Bank (1979 - 1992) ------------------------------------------------------------------------------------------------------------------------------------ Benjamin M. Friedman (73) Trustee since 2008. William Joseph Maier Professor of Political Trustee, Mellon Institutional Trustee Serves until a Economy, Harvard University (1972 - present) Funds Investment Trust and Mellon successor trustee is Institutional Funds Master elected or earlier Portfolio (oversaw 17 portfolios retirement or removal. in fund complex) (1989 - 2008) ------------------------------------------------------------------------------------------------------------------------------------ Margaret B.W. Graham (70) Trustee since 2005. Founding Director, Vice-President and Corporate None Trustee Serves until a Secretary, The Winthrop Group, Inc. (consulting successor trustee is firm) (1982 - present); Desautels Faculty of elected or earlier Management, McGill University (1999 - present); retirement or removal. and Manager of Research Operations and Organizational Learning, Xerox PARC, Xerox's advance research center (1990-1994) ------------------------------------------------------------------------------------------------------------------------------------ 62 Pioneer Global Equity Fund | Annual Report | 8/31/17 ------------------------------------------------------------------------------------------------------------------------------------ Name, Age and Position Term of Office and Other Directorships Held With the Fund Length of Service Principal Occupation Held by Trustee ------------------------------------------------------------------------------------------------------------------------------------ Lorraine H. Monchak (61) Trustee since 2017. Chief Investment Officer, 1199 SEIU Funds None Trustee (Advisory Trustee from (healthcare workers union pension funds) (2001 2014 - 2017). Serves - present); Vice President - International until a successor Investments Group, American International trustee is elected or Group, Inc. (insurance company) (1993 - 2001); earlier retirement or Vice President, Corporate Finance and Treasury removal. Group, Citibank, N.A. (1980 - 1986 and 1990 - 1993); Vice President - Asset/Liability Management Group, Federal Farm Funding Corporation (government-sponsored issuer of debt securities) (1988 - 1990); Mortgage Strategies Group, Shearson Lehman Hutton, Inc. (investment bank) (1987 - 1988); Mortgage Strategies Group, Drexel Burnham Lambert, Ltd. (investment bank) (1986 - 1987) ------------------------------------------------------------------------------------------------------------------------------------ Marguerite A. Piret (69) Trustee since 2005. President and Chief Executive Officer, Newbury Director of New America High Trustee Serves until a Piret Company (investment banking firm) (1981 - Income Fund, Inc. (closed-end successor trustee is present) investment company) (2004 - elected or earlier present); and Member, Board of retirement or removal. Governors, Investment Company Institute (2000 - 2006) ------------------------------------------------------------------------------------------------------------------------------------ Fred J. Ricciardi (70) Trustee since 2014. Consultant (investment company services) (2012 None Trustee Serves until a - present); Executive Vice President, BNY successor trustee is Mellon (financial and investment company elected or earlier services) (1969 - 2012); Director, BNY retirement or removal. International Financing Corp. (financial services) (2002 - 2012); Director, Mellon Overseas Investment Corp. (financial services) (2009 - 2012) ------------------------------------------------------------------------------------------------------------------------------------ Pioneer Global Equity Fund | Annual Report | 8/31/17 63 Interested Trustees ------------------------------------------------------------------------------------------------------------------------------------ Name, Age and Position Term of Office and Other Directorships Held With the Fund Length of Service Principal Occupation Held by Trustee ------------------------------------------------------------------------------------------------------------------------------------ Lisa M. Jones (55)* Trustee since 2017. Chair, Director, CEO and President of Amundi None Trustee, President and Serves until a Pioneer Asset Management USA, Inc. (since Chief Executive Officer successor trustee is September 2014); Chair, Director and CEO of elected or earlier Amundi Pioneer Asset Management, Inc. (since retirement or removal September 2014); Chair, Director and CEO of Amundi Pioneer Distributor, Inc. (since September 2014); Chair, Director, CEO and President of Amundi Pioneer Institutional Asset Management, Inc. (since September 2014); Managing Director, Morgan Stanley Investment Management (2010 - 2013); Director of Institutional Business, CEO of International, Eaton Vance Management (2005 - 2010) ------------------------------------------------------------------------------------------------------------------------------------ Kenneth J. Taubes (59)* Trustee since 2014. Director and Executive Vice President (since None Trustee Serves until a 2008) and Chief Investment Officer, U.S. (since successor trustee is 2010) of Amundi Pioneer Asset Management USA, elected or earlier Inc.; Executive Vice President and Chief retirement or removal Investment Officer, U.S. of Amundi Pioneer (since 2008); Executive Vice President of Amundi Pioneer Institutional Asset Management, Inc. (since 2009); Portfolio Manager of Amundi Pioneer (since 1999) ------------------------------------------------------------------------------------------------------------------------------------ 64 Pioneer Global Equity Fund | Annual Report | 8/31/17 Fund Officers ------------------------------------------------------------------------------------------------------------------------------------ Name, Age and Position Term of Office and Other Directorships Held With the Fund Length of Service Principal Occupation Held by Trustee ------------------------------------------------------------------------------------------------------------------------------------ Christopher J. Kelley Since 2005. Serves at Vice President and Associate General Counsel of None (52) the discretion of the Amundi Pioneer since January 2008; Secretary Secretary and Board and Chief Legal Officer of all of the Pioneer Chief Legal Officer Funds since June 2010; Assistant Secretary of all of the Pioneer Funds from September 2003 to May 2010; Vice President and Senior Counsel of Amundi Pioneer from July 2002 to December 2007 ------------------------------------------------------------------------------------------------------------------------------------ Carol B. Hannigan (56) Since 2010. Serves at Fund Governance Director of Amundi Pioneer None Assistant Secretary the discretion of the since December 2006 and Assistant Secretary of Board all the Pioneer Funds since June 2010; Manager - Fund Governance of Amundi Pioneer from December 2003 to November 2006; and Senior Paralegal of Amundi Pioneer from January 2000 to November 2003 ------------------------------------------------------------------------------------------------------------------------------------ Thomas Reyes (54) Since 2010. Serves at Senior Counsel of Amundi Pioneer since May 2013 None Assistant Secretary the discretion of the and Assistant Secretary of all the Pioneer Board Funds since June 2010; Counsel of Amundi Pioneer from June 2007 to May 2013 ------------------------------------------------------------------------------------------------------------------------------------ Mark E. Bradley (57) Since 2008. Serves at Vice President - Fund Treasury of Amundi None Treasurer and the discretion of the Pioneer; Treasurer of all of the Pioneer Funds Chief Financial and Board since March 2008; Deputy Treasurer of Amundi Accounting Officer Pioneer from March 2004 to February 2008; and Assistant Treasurer of all of the Pioneer Funds from March 2004 to February 2008 ------------------------------------------------------------------------------------------------------------------------------------ Luis I. Presutti (52) Since 2005. Serves at Director - Fund Treasury of Amundi Pioneer; and None Assistant Treasurer the discretion of the Assistant Treasurer of all of the Pioneer Funds Board ------------------------------------------------------------------------------------------------------------------------------------ Gary Sullivan (59) Since 2005. Serves at Fund Accounting Manager - Fund Treasury of None Assistant Treasurer the discretion of the Amundi Pioneer; and Assistant Treasurer of all Board of the Pioneer Funds ------------------------------------------------------------------------------------------------------------------------------------ David F. Johnson (37) Since 2009. Serves at Fund Administration Manager - Fund Treasury of None Assistant Treasurer the discretion of the Amundi Pioneer since November 2008; Assistant Board Treasurer of all of the Pioneer Funds since January 2009; Client Service Manager - Institutional Investor Services at State Street Bank from March 2003 to March 2007 ------------------------------------------------------------------------------------------------------------------------------------ Pioneer Global Equity Fund | Annual Report | 8/31/17 65 Fund Officers (continued) ------------------------------------------------------------------------------------------------------------------------------------ Name, Age and Position Term of Office and Other Directorships Held With the Fund Length of Service Principal Occupation Held by Trustee ------------------------------------------------------------------------------------------------------------------------------------ Jean M. Bradley (64) Since 2010. Serves at Chief Compliance Officer of Amundi Pioneer and None Chief Compliance Officer the discretion of the of all the Pioneer Funds since March 2010; Board Chief Compliance Officer of Amundi Pioneer Institutional Asset Management, Inc. since January 2012; Chief Compliance Officer of Vanderbilt Capital Advisors, LLC since July 2012: Director of Adviser and Portfolio Compliance at Amundi Pioneer since October 2005; Senior Compliance Officer for Columbia Management Advisers, Inc. from October 2003 to October 2005 ------------------------------------------------------------------------------------------------------------------------------------ Kelly O'Donnell (46) Since 2006. Serves at Director - Transfer Agency Compliance of Amundi None Anti-Money the discretion of the Pioneer and Anti-Money Laundering Officer of Laundering Officer Board all the Pioneer Funds since 2006 ------------------------------------------------------------------------------------------------------------------------------------ * Ms. Jones and Mr. Taubes are Interested Trustees because they are officers or directors of the fund's investment adviser and certain of its affiliates. 66 Pioneer Global Equity Fund | Annual Report | 8/31/17 This page is for your notes. Pioneer Global Equity Fund | Annual Report | 8/31/17 67 This page is for your notes. 68 Pioneer Global Equity Fund | Annual Report | 8/31/17 How to Contact Amundi Pioneer We are pleased to offer a variety of convenient ways for you to contact us for assistance or information. Call us for: -------------------------------------------------------------------------------- Account Information, including existing accounts, new accounts, prospectuses, applications and service forms 1-800-225-6292 FactFone(SM) for automated fund yields, prices, account information and transactions 1-800-225-4321 Retirement plans information 1-800-622-0176 Write to us: -------------------------------------------------------------------------------- Amundi Pioneer P.O. Box 55014 Boston, Massachusetts 02205-5014 Our toll-free fax 1-800-225-4240 Our internet e-mail address ask.amundipioneer@amundipioneer.com (for general questions about Amundi Pioneer only) Visit our web site: www.amundipioneer.com This report must be preceded or accompanied by a prospectus. The Fund files a complete schedule of investments with the Securities and Exchange Commission for the first and third quarters for each fiscal year on Form N-Q. Shareholders may view the filed Form N-Q by visiting the Commission's web site at http://www.sec.gov. The filed form may also be viewed and copied at the Commission's Public Reference Room in Washington, DC. Information regarding the operations of the Public Reference Room may be obtained by calling 1-800-SEC-0330. [LOGO] Amundi Pioneer ============== ASSET MANAGEMENT Amundi Pioneer Asset Management, Inc. 60 State Street Boston, MA 02109 www.amundipioneer.com Securities offered through Amundi Pioneer Distributor, Inc. 60 State Street, Boston, MA 02109 Underwriter of Pioneer Mutual Funds, Member SIPC (C) 2017 Amundi Pioneer Asset Management 19431-11-1017 Pioneer High Income Municipal Fund -------------------------------------------------------------------------------- Annual Report | August 31, 2017 -------------------------------------------------------------------------------- Ticker Symbols: Class A PIMAX Class C HICMX Class Y HIMYX [LOGO] Amundi Pioneer ============== ASSET MANAGEMENT visit us: www.amundipioneer.com Table of Contents President's Letter 2 Portfolio Management Discussion 4 Portfolio Summary 9 Prices and Distributions 10 Performance Update 11 Comparing Ongoing Fund Expenses 14 Schedule of Investments 16 Financial Statements 29 Notes to Financial Statements 36 Report of Independent Registered Public Accounting Firm 45 Additional Information 46 Approval of New and Interim Management Agreements 48 Trustees, Officers and Service Providers 57 Pioneer High Income Municipal Fund | Annual Report | 8/31/17 1 President's Letter We are very pleased to announce that on July 3, 2017, Amundi Asset Management, a large European asset manager, officially acquired Pioneer Investments and announced the completion of a merger which combined Pioneer Investment Management USA, Inc., in Boston and Amundi Smith Breeden in Durham, N.C., to form Amundi Pioneer Asset Management, Inc. ("Amundi Pioneer"). Amundi Smith Breeden, founded as Smith Breeden Associates in 1982, is a highly regarded relative-value credit investor managing an extensive range of fixed-income strategies tailored to the needs of institutional investors. Our new brand, Amundi Pioneer, now signifies: o Ownership by Amundi Asset Management ("Amundi"). Amundi is Europe's largest asset manager and among the world's top 10 asset managers, as measured by assets under management (AUM), with approximately $1.3 trillion AUM(1). o The significantly larger scale and resources of the combined firms. o Amundi's desire to maintain the strong brand recognition of Pioneer in the U.S., which dates back to 1928. We would like to stress to shareowners that all of the Pioneer mutual funds have retained their previous names. In addition, there have been no changes to the portfolio managers or the funds' investment strategies as a result of the merger. Amundi Pioneer's newly combined investment team works together as one unit, discussing investment ideas, participating in research meetings, and collaborating across the expanded organization. We are looking forward to the opportunity to leverage the broad global resources of Amundi. In bringing together Pioneer and Amundi Smith Breeden, we have combined organizations that share similar investment philosophies and corporate cultures, and that value teamwork across a collegial, collaborative environment. We are very excited about our future, as we believe the greater scale and expanded global reach of the combined firm, with some 5,000 employees worldwide, provides several opportunities to better meet the needs of today's investors by exploring new, innovative investment solutions and integrating the abundance of thought leadership resources at Amundi, while also maintaining our commitment to providing existing shareowners with outstanding service locally. (1) Source: IPE "Top 400 asset managers" published in June 2017 and based on AUM as of end December 2016. 2 Pioneer High Income Municipal Fund | Annual Report | 8/31/17 As always, and particularly during times of market uncertainty, we encourage you to work with your financial advisor to develop an overall investment plan that addresses both your short- and long-term goals, and to implement such a plan in a disciplined manner. We greatly appreciate the trust you have placed in us and look forward to continuing to serve you in the future as we move into a new and exciting era. Sincerely, /s/ Lisa M. Jones Lisa M. Jones Head of the Americas, President and CEO of U.S. Amundi Pioneer Asset Management USA, Inc. August 31, 2017 Any information in this shareowner report regarding market or economic trends or the factors influencing the Fund's historical or future performance are statements of opinion as of the date of this report. Past performance is no guarantee of future results. Pioneer High Income Municipal Fund | Annual Report | 8/31/17 3 Portfolio Management Discussion | 8/31/17 Important Note: On July 3, 2017, Amundi acquired Pioneer Investments, a group of asset management companies located throughout the world. Amundi, one of the world's largest asset managers, is headquartered in Paris, France. As a result of the transaction, Pioneer Investment Management, Inc., the Fund's investment adviser, became an indirect wholly owned subsidiary of Amundi and Amundi's wholly owned subsidiary, Amundi USA, Inc. Prior to July 3, 2017, Pioneer Investments was owned by Pioneer Global Asset Management S.p.A., a wholly owned subsidiary of UniCredit S.p.A. In connection with the transaction, the names of the Fund's investment adviser and principal underwriter changed. Effective July 3, 2017, the name of Pioneer Investment Management, Inc. changed to Amundi Pioneer Asset Management, Inc. and the name of Pioneer Funds Distributor, Inc. changed to Amundi Pioneer Distributor, Inc. This transaction does not impact your existing relationship with Pioneer Investments, your advisor, or the methods you use to communicate with us, as the investor contact telephone numbers and services you expect will remain the same. We are excited, however, to be launching a new website representing the combined company. Come visit us at: www.amundipioneer.com. High-yield municipal bonds rebounded sharply from their previous slump to produce positive results over the 12-month period ended August 31, 2017. In the following interview, Jonathan Chirunga and David Eurkus discuss the factors that influenced the performance of Pioneer High Income Municipal Fund during the 12-month period. Mr. Chirunga, a vice president and a portfolio manager at Amundi Pioneer Asset Management, Inc. (Amundi Pioneer), manages the Fund along with Mr. Eurkus, Director of Municipals, a senior vice president and a portfolio manager at Amundi Pioneer. Q How did the Fund perform during the 12-month period ended August 31, 2017? A Pioneer High Income Municipal Fund's Class A shares returned 1.32% at net asset value during the 12-month period ended August 31, 2017, while the Fund's benchmark, the Bloomberg Barclays U.S. Municipal High Yield Bond Index (the Bloomberg Barclays Index), returned 2.25%. During the same period, the average return of the 158 mutual funds in Lipper's High-Yield Municipal Debt Funds category was 0.90%, and the average return of the 167 mutual funds in Morningstar's High-Yield Municipal Funds category was 0.86%. 4 Pioneer High Income Municipal Fund | Annual Report | 8/31/17 Q How would you describe the investment environment in the municipal bond market during the 12-month period ended August 31, 2017? A At the start of the period in September 2016, lower-rated municipals were struggling as the market weighed the effects of mixed domestic economic growth signals while also dealing with political uncertainties surrounding the November 2016 national elections. Prior to the start of the period, anxieties in the high-yield municipal market had already been heightened by the Commonwealth of Puerto Rico's default on a group of general obligation bonds in July 2016. At the time of the default, Puerto Rico-issued bonds accounted for 23% of the Fund's benchmark, the Bloomberg Barclays Index. The general obligation bonds affected by the default announcement were subsequently removed from the Bloomberg Barclays Index, thus dropping the Commonwealth's debt representation in the benchmark to 13%. Additionally, a default of Puerto Rico-issued sales tax bonds reduced that number even further. Market sentiment would change dramatically after the November 2016 elections, which saw the Republicans win the White House and retain control of both houses of Congress. The results drove a rally led by investors who believed Republican control over Federal fiscal policy would spur economic growth, especially in light of the fact that Donald Trump's campaign had stressed pro-growth initiatives such as tax cuts, reduced regulation, and higher levels of infrastructure spending. Meanwhile, U.S. economic data suggested the economy was strengthening, which further encouraged investment in credit-sensitive securities, including high-yield municipal debt. These factors resulted in a robust market rebound that continued through the final 10 months of the period. In fact, while the Bloomberg Barclays Index produced a 2.25% total return for the full 12 months, its return for the final six months of the period was 4.31%. Moreover, the benchmark's year-to-date return through August 31, 2017, was an even more impressive 8.30%. High-yield municipals were the second-best performing fixed-income group over the second half of the 12-month period, trailing only 30-year Treasuries. The rally was barely affected by the tightening of Federal monetary policy by the U.S. Federal Reserve (the Fed), which hiked the influential short-term Federal funds rate three times during the period. In that environment, municipal bonds backed by tobacco liability revenues led the market surge. Education bonds, notably those issued to back charter schools, also performed well. Pioneer High Income Municipal Fund | Annual Report | 8/31/17 5 Q Which of your investment decisions drove the Fund's underperformance relative to the Bloomberg Barclays Index during the 12-month period ended August 31, 2017, and which decisions aided the Fund's performance? A While the Fund performed positively over the period, its return trailed that of the benchmark primarily because we avoided owning many of the lower-quality municipal bonds that outperformed as many investors sought out higher yields, irrespective of credit risk. Particularly in the second half of the period, some new issues that we believed carried too much risk came into the high-yield municipal market, and we largely avoided holding them in the portfolio, as we chose to follow an investment discipline that we believe may result in solid, more consistent Fund performance over the longer term. The Fund also had no exposure to any of the Puerto Rico-issued high-yield bonds that were components of the benchmark, which, as we noted earlier, accounted for 13% of the Bloomberg Barclays Index for much of the period. The Fund did, however, have positions in some better-quality general obligation Puerto Rico bonds, representing roughly 2% of the Fund's total investment portfolio. For the 12-month period, the Fund's investments in tobacco bonds and charter school-related bonds performed particularly well. Individual holdings that contributed positively to the Fund's performance included general obligation bonds issued by the Chicago Board of Education; Virginia tobacco bonds; and charter school bonds issued by the Colorado Education and Cultural Facility. Individual holdings that detracted from the Fund's performance included an industrial development revenue bond issued by Sanger, Texas; tobacco bonds issued by the District of Columbia; and debt issued by the Florida Development Finance Corp. Q Did the Fund have any investments in any derivative securities during the 12-month period ended August 31, 2017? A No, the Fund had no investments in any derivatives. Q Did the Fund's yield, or distributions to shareholders, change during the 12-month period ended August 31, 2017? A The Fund's yield did decline slightly early in the period; however, for the remainder of the fiscal year it remained relatively stable, despite the general decline of interest rates in the market. 6 Pioneer High Income Municipal Fund | Annual Report | 8/31/17 Q What is your investment outlook? A Our outlook for the high-yield municipal market is generally positive. We believe strong demand from both traditional and non-traditional investors drawn to the market by the attractive values and generous yields of municipal bonds - as compared with taxable debt - can continue to outstrip the limited new-issue supply and help support prices of higher-yielding securities. At the same time, we think the U.S. economy is in good condition and should continue to grow at a moderate pace. While it seems committed to further tightening monetary policy, we think the Fed will act cautiously and monitor the economy closely before hiking interest rates again, given that it has already done so three times since last December. Despite earlier expectations that Republican control of the Federal government would lead to policies injecting more fiscal stimulus into the economy, the prospects for tax cuts or new investments on infrastructure projects remain uncertain. However, the lack of political consensus on those issues, thus far, does not appear to have harmed the economy or affected the markets. Consistent with our investment discipline in managing the Fund, we intend to continue to focus on intensive, fundamental research into individual bond issues, while maintaining a close watch on any macroeconomic factors that could influence the high-yield municipal market. Pioneer High Income Municipal Fund | Annual Report | 8/31/17 7 Please refer to the Schedule of Investments on pages 16-28 for a full listing of Fund securities. All investments are subject to risk, including the possible loss of principal. In the past several years, financial markets have experienced increased volatility, depressed valuations, decreased liquidity and heightened uncertainty. These conditions may continue, recur, worsen or spread. Investments in high-yield or lower-rated securities are subject to greater-than- average price volatility, illiquidity and possibility of default. When interest rates rise, the prices of fixed-income securities in the Fund will generally fall. Conversely, when interest rates fall, the prices of fixed-income securities in the Fund will generally rise. Investments in the Fund are subject to possible loss due to the financial failure of issuers of underlying securities and their inability to meet their debt obligations. Prepayment risk is the chance that an issuer may exercise its right to prepay its security, if falling interest rates prompt the issuer to do so. Forced to reinvest the unanticipated proceeds at lower interest rates, the Fund would experience a decline in income and lose the opportunity for additional price appreciation. The value of municipal securities can be adversely affected by changes in financial condition of municipal issuers, lower revenues, and regulatory and political developments. The Fund is non-diversified, which means that it can invest a large percentage of its assets in the securities of any one or more issuers. This increases the Fund's potential risk exposure. The Fund may use derivatives, such as options, futures, inverse floating rate obligations, swaps, and others, which can be illiquid, may disproportionately increase losses, and have a potentially large impact on Fund performance. Derivatives may have a leveraging effect on the Fund. A portion of income may be subject to local, state, federal, and/or alternative minimum tax. Capital gains, if any, are subject to a capital gains tax. At times, the Fund's investments may represent industries or industry sectors that are interrelated or have common risks, making it more susceptible to any economic, political, or regulatory developments or other risks affecting those industries and sectors. These risks may increase share price volatility. Before investing, consider the product's investment objectives, risks, charges and expenses. Contact your advisor or Amundi Pioneer Asset Management, Inc., for a prospectus or summary prospectus containing this information. Read it carefully. Any information in this shareholder report regarding market or economic trends or the factors influencing the Fund's historical or future performance are statements of opinion as of the date of this report. Past performance is not a guarantee of future results. 8 Pioneer High Income Municipal Fund | Annual Report | 8/31/17 Portfolio Summary | 8/31/17 Sector Distribution -------------------------------------------------------------------------------- (As a percentage of total investment portfolio) [THE FOLLOWING DATA WAS REPRESENTED AS A PIE CHART IN THE PRINTED MATERIAL] Special Revenues 25.8% Health 21.3% Education 21.1% Various Revenues 8.4% General Obligation 6.8% Housing 6.6% Pollution Control Revenue 4.0% Escrowed 3.5% Transportation 2.0% Insured 0.3% Water & Sewer 0.2% 10 Largest Holdings -------------------------------------------------------------------------------- (As a percentage of total investment portfolio)* 1. City of Philippi West Virginia, 7.75%, 10/1/44 2.53% -------------------------------------------------------------------------------- 2. Tobacco Settlement Financing Corp. Virginia, 5.0%, 6/1/47 2.41 -------------------------------------------------------------------------------- 3. Commonwealth of Puerto Rico, 8.0%, 7/1/35 (f) (g) 2.05 -------------------------------------------------------------------------------- 4. Buckeye Tobacco Settlement Financing Authority, 5.875%, 6/1/47 1.93 -------------------------------------------------------------------------------- 5. Pennsylvania Economic Development Financing Authority, US Airways Group Series B, 8.0%, 5/1/29 1.60 -------------------------------------------------------------------------------- 6. Michigan Tobacco Settlement Finance Authority, 6.0%, 6/1/48 1.54 -------------------------------------------------------------------------------- 7. Suffolk Tobacco Asset Securitization Corp., 6.0%, 6/1/48 1.52 -------------------------------------------------------------------------------- 8. Chicago Board of Education, 6.5%, 12/1/46 (f) 1.51 -------------------------------------------------------------------------------- 9. Buckeye Tobacco Settlement Financing Authority, 6.0%, 6/1/42 1.49 -------------------------------------------------------------------------------- 10. Suffolk Tobacco Asset Securitization Corp., 6.6%, 6/1/44 1.42 -------------------------------------------------------------------------------- * This list excludes temporary cash investments and derivative instruments. The portfolio is actively managed, and current holdings may be different. The holdings listed should not be considered recommendations to buy or sell any security listed. Pioneer High Income Municipal Fund | Annual Report | 8/31/17 9 Prices and Distributions | 8/31/17 Net Asset Value per Share -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- Class 8/31/17 8/31/16 -------------------------------------------------------------------------------- A $7.32 $7.59 -------------------------------------------------------------------------------- C $7.32 $7.59 -------------------------------------------------------------------------------- Y $7.22 $7.49 -------------------------------------------------------------------------------- Distributions per Share: 9/1/16-8/31/17 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- Net Investment Short-Term Long-Term Class Income Capital Gains Capital Gains -------------------------------------------------------------------------------- A $0.3590 $ -- $ -- -------------------------------------------------------------------------------- C $0.3031 $ -- $ -- -------------------------------------------------------------------------------- Y $0.3667 $ -- $ -- -------------------------------------------------------------------------------- Index Definitions -------------------------------------------------------------------------------- The Bloomberg Barclays U.S. Municipal High Yield Bond Index is an unmanaged measure of the performance of the high-yield municipal bond market. Index returns are calculated monthly, assume reinvestment of dividends and, unlike Fund returns, do not reflect any fees, expenses or sales charges. It is not possible to invest directly in an index. The index defined here pertains to the "Value of $10,000 Investment" and "Value of $5 Million Investment" charts shown on pages 11-13. 10 Pioneer High Income Municipal Fund | Annual Report | 8/31/17 Performance Update | 8/31/17 Class A Shares Investment Returns -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $10,000 investment made in Class A shares of Pioneer High Income Municipal Fund at public offering price during the periods shown, compared to that of the Bloomberg Barclays U.S. Municipal High Yield Bond Index. Average Annual Total Returns (As of August 31, 2017) -------------------------------------------------------------------------------- Bloomberg Net Public Barclays U.S. Asset Offering Municipal Value Price High Yield Period (NAV) (POP) Bond Index -------------------------------------------------------------------------------- 10 years 3.42% 2.94% 4.92% 5 years 3.94 3.00 5.02 1 year 1.32 -3.26 2.25 -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated December 31, 2016) -------------------------------------------------------------------------------- Gross -------------------------------------------------------------------------------- 0.87% -------------------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $10,000 Investment Bloomberg Barclays Pioneer High Income U.S. Municipal High Municipal Fund Yield Bond Index 8/07 $ 9,550 $ 10,000 8/08 $ 9,076 $ 9,563 8/09 $ 7,768 $ 8,684 8/10 $ 9,722 $ 10,601 8/11 $ 9,900 $ 10,967 8/12 $ 11,012 $ 12,656 8/13 $ 10,543 $ 12,161 8/14 $ 11,335 $ 13,954 8/15 $ 11,888 $ 13,944 8/16 $ 13,184 $ 15,809 8/17 $ 13,359 $ 16,165 Call 1-800-225-6292 or visit www.amundipioneer.com for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. NAV results represent the percent change in net asset value per share. Returns would have been lower had sales charges been reflected. POP returns reflect deduction of maximum 4.50% sales charge. All results are historical and assume the reinvestment of dividends and capital gains. Other share classes are available for which performance and expenses will differ. Performance results reflect any applicable expense waivers in effect during the periods shown. Without such waivers Fund performance would be lower. Waivers may not be in effect for all funds. Certain fee waivers are contractual through a specified period. Otherwise, fee waivers can be rescinded at any time. See the prospectus and financial statements for more information. The performance table and graph do not reflect the deduction of fees and taxes that a shareowner would pay on Fund distributions or the redemption of Fund shares. Please refer to the financial highlights for a more current expense ratio. Pioneer High Income Municipal Fund | Annual Report | 8/31/17 11 Performance Update | 8/31/17 Class C Shares Investment Returns -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $10,000 investment made in Class C shares of Pioneer High Income Municipal Fund during the periods shown, compared to that of the Bloomberg Barclays U.S. Municipal High Yield Bond Index. Average Annual Total Returns (As of August 31, 2017) -------------------------------------------------------------------------------- Bloomberg Barclays U.S. Municipal If If High Yield Period Held Redeemed Bond Index -------------------------------------------------------------------------------- 10 years 2.60% 2.60% 4.92% 5 years 3.15 3.15 5.02 1 year 0.55 0.55 2.25 -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated December 31, 2016) -------------------------------------------------------------------------------- Gross -------------------------------------------------------------------------------- 1.63% -------------------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $10,000 Investment Bloomberg Barclays Pioneer High Income U.S. Municipal High Municipal Fund Yield Bond Index 8/07 $ 10,000 $ 10,000 8/08 $ 9,406 $ 9,563 8/09 $ 7,979 $ 8,684 8/10 $ 9,903 $ 10,601 8/11 $ 10,020 $ 10,967 8/12 $ 11,065 $ 12,656 8/13 $ 10,514 $ 12,161 8/14 $ 11,234 $ 13,954 8/15 $ 11,678 $ 13,944 8/16 $ 12,853 $ 15,809 8/17 $ 12,923 $ 16,165 Call 1-800-225-6292 or visit www.amundipioneer.com for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. Class C shares held for less than one year are also subject to a 1% contingent deferred sales charge (CDSC). "If Held" results represent the percent change in net asset value per share. Returns would have been lower had sales charges been reflected. All results are historical and assume the reinvestment of dividends and capital gains. Other share classes are available for which performance and expenses will differ. Performance results reflect any applicable expense waivers in effect during the periods shown. Without such waivers Fund performance would be lower. Waivers may not be in effect for all funds. Certain fee waivers are contractual through a specified period. Otherwise, fee waivers can be rescinded at any time. See the prospectus and financial statements for more information. The performance table and graph do not reflect the deduction of fees and taxes that a shareowner would pay on Fund distributions or the redemption of Fund shares. Please refer to the financial highlights for a more current expense ratio. 12 Pioneer High Income Municipal Fund | Annual Report | 8/31/17 Performance Update | 8/31/17 Class Y Shares Investment Returns -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $5 million investment made in Class Y shares of Pioneer High Income Municipal Fund during the periods shown, compared to that of the Bloomberg Barclays U.S. Municipal High Yield Bond Index. Average Annual Total Returns (As of August 31, 2017) -------------------------------------------------------------------------------- Bloomberg Net Barclays U.S. Asset Municipal Value High Yield Period (NAV) Bond Index -------------------------------------------------------------------------------- 10 years 3.46% 4.92% 5 years 4.10 5.02 1 year 1.45 2.25 -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated December 31, 2016) -------------------------------------------------------------------------------- Gross -------------------------------------------------------------------------------- 0.71% -------------------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $5 Million Investment Bloomberg Barclays Pioneer High Income U.S. Municipal High Municipal Fund Yield Bond Index 8/07 $ 5,000,000 $ 5,000,000 8/08 $ 4,727,543 $ 4,781,369 8/09 $ 4,051,449 $ 4,342,015 8/10 $ 5,053,200 $ 5,300,736 8/11 $ 5,155,174 $ 5,483,642 8/12 $ 5,744,204 $ 6,327,987 8/13 $ 5,511,252 $ 6,080,568 8/14 $ 5,934,970 $ 6,976,904 8/15 $ 6,226,791 $ 6,971,941 8/16 $ 6,922,505 $ 7,904,668 8/17 $ 7,022,917 $ 8,082,612 Call 1-800-225-6292 or visit www.amundipioneer.com for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. Class Y shares are not subject to sales charges and are available for limited groups of eligible investors, including institutional investors. All results are historical and assume the reinvestment of dividends and capital gains. Other share classes are available for which performance and expenses will differ. Performance results reflect any applicable expense waivers in effect during the periods shown. Without such waivers Fund performance would be lower. Waivers may not be in effect for all funds. Certain fee waivers are contractual through a specified period. Otherwise, fee waivers can be rescinded at any time. See the prospectus and financial statements for more information. The performance table and graph do not reflect the deduction of fees and taxes that a shareowner would pay on Fund distributions or the redemption of Fund shares. Please refer to the financial highlights for a more current expense ratio. Pioneer High Income Municipal Fund | Annual Report | 8/31/17 13 Comparing Ongoing Fund Expenses As a shareowner in the Fund, you incur two types of costs: (1) ongoing costs, including management fees, distribution and/or service (12b-1) fees, and other Fund expenses; and (2) transaction costs, including sales charges (loads) on purchase payments. This example is intended to help you understand your ongoing expenses (in dollars) of investing in the Fund and to compare these costs with the ongoing costs of investing in other mutual funds. The example is based on an investment of $1,000 at the beginning of the Fund's latest six-month period and held throughout the six months. Using the Tables -------------------------------------------------------------------------------- Actual Expenses The first table below provides information about actual account values and actual expenses. You may use the information in this table, together with the amount you invested, to estimate the expenses that you paid over the period as follows: 1. Divide your account value by $1,000 Example: an $8,600 account value (divided by) $1,000 = 8.6 2. Multiply the result in (1) above by the corresponding share class's number in the third row under the heading entitled "Expenses Paid During Period" to estimate the expenses you paid on your account during this period. Expenses Paid on a $1,000 Investment in Pioneer High Income Municipal Fund Based on actual returns from March 1, 2017, through August 31, 2017. -------------------------------------------------------------------------------- Share Class A C Y -------------------------------------------------------------------------------- Beginning Account $1,000.00 $1,000.00 $1,000.00 Value on 3/1/17 -------------------------------------------------------------------------------- Ending Account Value $1,039.93 $1,036.06 $1,039.55 (after expenses) on 8/31/17 -------------------------------------------------------------------------------- Expenses Paid $ 4.52 $ 8.47 $ 3.70 During Period* -------------------------------------------------------------------------------- * Expenses are equal to the Fund's annualized net expense ratio of 0.88%, 1.65% and 0.72% for Class A, Class C and Class Y shares, respectively, multiplied by the average account value over the period, multiplied by 184/365 (to reflect the one-half year period). 14 Pioneer High Income Municipal Fund | Annual Report | 8/31/17 Hypothetical Example for Comparison Purposes The table below provides information about hypothetical account values and hypothetical expenses based on the Fund's actual expense ratio and an assumed rate of return of 5% per year before expenses, which is not the Fund's actual return. The hypothetical account values and expenses may not be used to estimate the actual ending account balance or expenses you paid for the period. You may use this information to compare the ongoing costs of investing in the Fund and other funds. To do so, compare this 5% hypothetical example with the 5% hypothetical examples that appear in the shareholder reports of the other funds. Please note that the expenses shown in the tables are meant to highlight your ongoing costs only and do not reflect any transaction costs, such as sales charges (loads) that are charged at the time of the transaction. Therefore, the table below is useful in comparing ongoing costs only and will not help you determine the relative total costs of owning different funds. In addition, if these transaction costs were included, your costs would have been higher. Expenses Paid on a $1,000 Investment in Pioneer High Income Municipal Fund Based on a hypothetical 5% return per year before expenses, reflecting the period from March 1, 2017, through August 31, 2017. -------------------------------------------------------------------------------- Share Class A C Y -------------------------------------------------------------------------------- Beginning Account $1,000.00 $1,000.00 $1,000.00 Value on 3/1/17 -------------------------------------------------------------------------------- Ending Account Value $1,020.77 $1,016.89 $1,021.58 (after expenses) on 8/31/17 -------------------------------------------------------------------------------- Expenses Paid $ 4.48 $ 8.39 $ 3.67 During Period* -------------------------------------------------------------------------------- * Expenses are equal to the Fund's annualized net expense ratio of 0.88%, 1.65% and 0.72% for Class A, Class C and Class Y shares, respectively, multiplied by the average account value over the period, multiplied by 184/365 (to reflect the one-half year period). Pioneer High Income Municipal Fund | Annual Report | 8/31/17 15 Schedule of Investments | 8/31/17 ----------------------------------------------------------------------------------------------------------------- Effective Reference Principal Interest Index + Amount ($) Rate (b) Spread (c) Value ----------------------------------------------------------------------------------------------------------------- UNAFFILIATED ISSUERS -- 98.4% CORPORATE BONDS -- 1.3% DIVERSIFIED FINANCIALS -- 1.3% Specialized Finance -- 1.3% 3,275,000 Texas Pellets, Inc., 8.0%, 12/10/17 (144A) $ 3,275,000 3,125,000 Texas Pellets, Inc., 8.0%, 12/10/17 (144A) 3,125,000 1,600,000 Texas Pellets, Inc., 8.0%, 9/10/17 (144A) 1,600,000 --------------- $ 8,000,000 --------------- Total Diversified Financials $ 8,000,000 ----------------------------------------------------------------------------------------------------------------- TOTAL CORPORATE BONDS (Cost $8,000,000) $ 8,000,000 ----------------------------------------------------------------------------------------------------------------- MUNICIPAL BONDS -- 97.1% (e) Alaska -- 0.6% 3,700,000 Northern Tobacco Securitization Corp., 5.0%, 6/1/46 $ 3,534,721 ----------------------------------------------------------------------------------------------------------------- Arizona -- 2.9% 4,000,000 The Industrial Development Authority of the City of Phoenix, 5.125%, 7/1/36 $ 4,036,960 8,000,000 The Industrial Development Authority of the City of Phoenix, 5.4%, 10/1/36 7,683,040 1,000,000 The Industrial Development Authority of the County of Pima, Desert hights Charter, 7.0%, 5/1/34 1,094,330 3,000,000 The Industrial Development Authority of the County of Pima, Desert heights Charter, 7.25%, 5/1/44 3,298,170 700,000 The Industrial Development Authority of the County of Pima, Legacy Traditional School Project, 8.5%, 7/1/39 (Pre-Refunded) 786,597 490,000 The Industrial Development Authority of the County of Pima, Paradise Education Center, 6.0%, 6/1/40 532,537 --------------- $ 17,431,634 ----------------------------------------------------------------------------------------------------------------- California -- 9.6% 1,215,000 California County Tobacco Securitization Agency, 6/1/36 $ 1,229,118 5,880,000 California County Tobacco Securitization Agency, Merced County, 5.25%, 6/1/45 5,846,308 4,660,000 California County Tobacco Securitization Agency, Sonoma County Corp., 5.125%, 6/1/38 4,630,782 2,385,000 California County Tobacco Securitization Agency, Sonoma County Corp., 5.25%, 6/1/45 2,371,334 1,300,000 California Municipal Finance Authority, John Adams Academics Project, 5.25%, 10/1/45 1,407,185 The accompanying notes are an integral part of these financial statements. 16 Pioneer High Income Municipal Fund | Annual Report | 8/31/17 ----------------------------------------------------------------------------------------------------------------- Effective Reference Principal Interest Index + Amount ($) Rate (b) Spread (c) Value ----------------------------------------------------------------------------------------------------------------- California -- (continued) 6,300,000 California Municipal Finance Authority, Santa Rosa Academy Project Ser A, 6.0%, 7/1/42 $ 6,831,090 500,000 California Municipal Finance Authority, Santa Rosa Academy Project, 5.125%, 7/1/35 533,495 1,575,000 California Municipal Finance Authority, Santa Rosa Academy Project, 5.375%, 7/1/45 1,688,116 1,000,000 California School Finance Authority, 6.0%, View Park Elementary and Middle School, 10/1/49 1,095,430 3,000,000 California School Finance Authority, 7.375%, Classical Academies Project, 10/1/43 3,540,000 3,230,000 California School Finance Authority, ICEF View Park High School, 7.125%, 10/1/48 3,724,319 830,000 California School Finance Authority, View Park Elementary and Middle School, 5.625%, 10/1/34 901,787 1,475,000 California School Finance Authority, View Park Elementary and Middle School, 5.875%, 10/1/44 1,609,387 1,560,000 California Statewide Communities Development Authority, California Baptist University, 6.125%, 11/1/33 1,757,636 4,030,000 California Statewide Communities Development Authority, California Baptist University, 6.375%, 11/1/43 4,585,979 2,000,000 California Statewide Communities Development Authority, Lancer Edl Student Housing Project, 7.5%, 6/1/42 2,212,780 315,559 California Statewide Communities Development Authority, Microgy Holdings Project, 9.0%, 12/1/38 (g) 3 5,810,000 Golden State Tobacco Securitization Corp., 6/1/37 5,843,872 2,500,000 Pittsburg Unified School District, 9/1/41 (AGM CNTY GTD) (d) 1,014,875 1,925,000 Pittsburg Unified School District, 9/1/42 (AGM CNTY GTD) (d) 748,998 2,000,000 River Islands Public Financing Authority, 5.5%, 9/1/45 2,144,900 4,395,000 Tobacco Securitization Authority of Southern California, 5.0%, 6/1/37 4,394,560 --------------- $ 58,111,954 ----------------------------------------------------------------------------------------------------------------- Colorado -- 4.7% 2,345,000 Castle Oaks Metropolitan District No 3, 5.5%, 12/1/45 (f) $ 2,415,960 2,860,000 Castle Oaks Metropolitan District No 3, 6.25%, 12/1/44 (f) 3,047,759 The accompanying notes are an integral part of these financial statements. Pioneer High Income Municipal Fund | Annual Report | 8/31/17 17 Schedule of Investments | 8/31/17 (continued) ----------------------------------------------------------------------------------------------------------------- Effective Reference Principal Interest Index + Amount ($) Rate (b) Spread (c) Value ----------------------------------------------------------------------------------------------------------------- Colorado -- (continued) 2,000,000 Colorado Educational & Cultural Facilities Authority, Charter School Rocky Mountain Classical, 8.0%, 9/1/43 $ 2,247,180 5,000,000 Colorado Educational & Cultural Facilities Authority, Charter School Rocky Mountain Classical, 8.125%, 9/1/48 5,635,900 2,000,000 Copperleaf Metropolitan District No 2, 5.75%, 12/1/45 (f) 2,121,540 2,840,000 Crystal Crossing Metropolitan District, 5.25%, 12/1/40 (f) 2,890,183 1,500,000 Dominion Water & Sanitation District, 6.0%, 12/1/46 1,560,765 2,575,000 Great Western Park Metropolitan District No 2, 5.0%, 12/1/46 (f) 2,595,059 500,000 Leyden Rock Metropolitan District No 10, 4.0%, 12/1/25 (f) 501,850 500,000 Leyden Rock Metropolitan District No 10, 7.25%, 12/15/45 (f) 468,030 1,700,000 Littleton Village Metropolitan District No 2, 5.375%, 12/1/45 (f) 1,714,654 1,500,000 Promenade Castle Rock Metropolitan District No 1, 5.75%, 12/1/39 (f) 1,591,635 1,000,000 Sterling Ranch Community Authority Board, 5.75%, 12/1/45 (MUN GOVT GTD) 1,009,030 575,000 Water Valley Metropolitan District No 02, 5.25%, 12/1/40 (f) 620,005 --------------- $ 28,419,550 ----------------------------------------------------------------------------------------------------------------- Connecticut -- 0.5% 2,885,000 Town of Hamden Connecticut, Whitney Center Project, 7.75%, 1/1/43 $ 3,041,136 ----------------------------------------------------------------------------------------------------------------- District of Columbia -- 0.1% 735,000 District of Columbia Tobacco Settlement Financing Corp., 6.75%, 5/15/40 $ 786,347 ----------------------------------------------------------------------------------------------------------------- Florida -- 1.1% 5,000,000 Alachua County Health Facilities Authority, Terraces Bonita Springs Project, 8.125%, 11/15/46 $ 5,752,000 1,820,000 County of Liberty Florida, 8.25%, 7/1/28 (g) 910,000 --------------- $ 6,662,000 ----------------------------------------------------------------------------------------------------------------- Georgia -- 0.9% 5,000,000 Atlanta Development Authority, 6.75%, 1/1/35 $ 5,195,000 ----------------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 18 Pioneer High Income Municipal Fund | Annual Report | 8/31/17 ----------------------------------------------------------------------------------------------------------------- Effective Reference Principal Interest Index + Amount ($) Rate (b) Spread (c) Value ----------------------------------------------------------------------------------------------------------------- Hawaii -- 0.2% 1,000,000 State of Hawaii Department of Budget & Finance, 15 Craigside Project, 9.0%, 11/15/44 $ 1,174,120 ----------------------------------------------------------------------------------------------------------------- Illinois -- 6.6% 1,000,000 Chicago Board of Education, 5.75%, 4/1/35 $ 1,114,450 2,010,000 Chicago Board of Education, 6.0%, 4/1/46 2,336,022 8,000,000 Chicago Board of Education, 6.5%, 12/1/46 (f) 8,980,080 1,000,000 Chicago Board of Education, 7.0%, 12/1/46 (f) 1,172,830 4,213,653 4.00 Illinois Finance Authority, Clare Oaks Project Series B, Floating Rate Note, 11/15/52 3,128,637 2,634,795 Illinois Finance Authority, Clare Oaks Project Series C1, 11/15/52 (d) 90,373 526,959 Illinois Finance Authority, Clare Oaks Project Series C2, 11/15/52 (d) 138,221 526,959 Illinois Finance Authority, Clare Oaks Project Series C3, 11/15/52 (d) 85,525 1,155,000 Illinois Finance Authority, Norwegian American Hospital, 7.625%, 9/15/28 1,213,224 4,780,000 Illinois Finance Authority, Norwegian American Hospital, 7.75%, 9/15/38 5,318,993 6,805,000 Metropolitan Pier & Exposition Authority, 5.0%, 6/15/50 (ST APPROP) 6,855,561 340,000 Metropolitan Pier & Exposition Authority, 5.2%, 6/15/50 (ST APPROP) 346,865 7,020,000 Southwestern Illinois Development Authority, Comprehensive Mental Health Center, 6.625%, 6/1/37 6,992,271 2,110,000 Southwestern Illinois Development Authority, Village of Sauget Project, 5.625%, 11/1/26 2,021,654 --------------- $ 39,794,706 ----------------------------------------------------------------------------------------------------------------- Indiana -- 8.4% 1,750,000 City of Carmel Indiana, Barrington Carmel Project Series A, 7.0%, 11/15/32 $ 1,908,165 2,000,000 City of Carmel Indiana, Barrington Carmel Project Series A, 7.125%, 11/15/42 2,182,540 2,000,000 City of Carmel Indiana, Barrington Carmel Project Series A, 7.125%, 11/15/47 2,177,780 3,500,000 City of Crown Point Indiana, Wittenberg Village Project, 8.0%, 11/15/39 3,750,320 2,475,000 City of Evansville Indiana, 5.45%, 1/1/38 2,482,178 1,275,000 City of Kokomo Indiana, 5.75%, 1/1/34 1,305,664 5,325,000 City of Kokomo Indiana, 5.875%, 1/1/37 5,456,368 1,230,000 City of Lafayette Indiana, 5.6%, 1/1/33 1,255,067 The accompanying notes are an integral part of these financial statements. Pioneer High Income Municipal Fund | Annual Report | 8/31/17 19 Schedule of Investments | 8/31/17 (continued) ----------------------------------------------------------------------------------------------------------------- Effective Reference Principal Interest Index + Amount ($) Rate (b) Spread (c) Value ----------------------------------------------------------------------------------------------------------------- Indiana -- (continued) 6,000,000 City of Lafayette Indiana, 5.8%, 1/1/37 $ 6,112,860 2,050,000 City of Muncie Indiana, 5.05%, 1/1/31 2,009,348 5,510,000 City of Muncie Indiana, 5.25%, 1/1/37 5,308,775 4,000,000 Hospital Authority of Vigo County, Union Hospital, Inc., 8.0%, 9/1/41 5,058,560 2,100,000 Indiana Finance Authority, 5.125%, 7/1/37 2,076,669 3,420,000 Indiana Finance Authority, 5.375%, 7/1/47 3,377,387 6,580,000 Indiana State housing & Community Development Authority Evergreen Village Bloomington Project, 5.5%, 1/1/37 6,426,423 --------------- $ 50,888,104 ----------------------------------------------------------------------------------------------------------------- Iowa -- 0.5% 3,000,000 Iowa Tobacco Settlement Authority, 5.625%, 6/1/46 $ 3,009,000 ----------------------------------------------------------------------------------------------------------------- Maryland -- 0.2% 970,000 Maryland Health & Higher Educational Facilities Authority, City Neighbors Series A, 6.75%, 7/1/44 $ 1,070,608 ----------------------------------------------------------------------------------------------------------------- Massachusetts -- 1.9% 1,116,746 Massachusetts Development Finance Agency Senior Linden Ponds Inc. Series B Subseries II, 11/15/56 (d) $ 26,188 3,903,837 Massachusetts Development Finance Agency, 5.5%, Linden Ponds, Inc., 11/15/46 3,903,642 2,000,000 Massachusetts Development Finance Agency, Adventcare Project Series A, 6.75%, 10/15/37 2,005,260 830,000 Massachusetts Development Finance Agency, Adventcare Project, 7.625%, 10/15/37 895,985 1,235,770 Massachusetts Development Finance Agency, Linden Ponds, Inc., Series A-1, 6.25%, 11/15/26 1,288,513 3,340,294 Massachusetts Development Finance Agency, Linden Ponds, Inc., Series A-1, 6.25%, 11/15/39 3,459,309 --------------- $ 11,578,897 ----------------------------------------------------------------------------------------------------------------- Michigan -- 7.7% 1,250,000 Flint Hospital Building Authority, Hurley Medical Center Series A, 5.25%, 7/1/39 $ 1,294,175 1,250,000 Flint Hospital Building Authority, Hurley Medical Center, 7.375%, 7/1/35 1,362,900 5,485,000 Flint International Academy, 5.75%, 10/1/37 5,487,962 145,000 Michigan Public Educational Facilities Authority, Dr. Joseph Pollack, 7.25%, 4/1/20 151,379 The accompanying notes are an integral part of these financial statements. 20 Pioneer High Income Municipal Fund | Annual Report | 8/31/17 ----------------------------------------------------------------------------------------------------------------- Effective Reference Principal Interest Index + Amount ($) Rate (b) Spread (c) Value ----------------------------------------------------------------------------------------------------------------- Michigan -- (continued) 2,020,000 Michigan Public Educational Facilities Authority, Dr. Joseph Pollack, 8.0%, 4/1/40 $ 2,150,936 4,195,000 Michigan Public Educational Facilities Authority, Ltd Oblig-David Ellis-West Project, 5.875%, 6/1/37 4,195,881 7,135,000 6.75 Michigan Strategic Fund, CFP Michigan Dept Offices Lease B, Floating Rate Note, 3/1/40 7,457,074 4,000,000 6.62 Michigan Strategic Fund, Floating Rate Note, 11/1/41 4,097,680 80,000,000 Michigan Tobacco Settlement Finance Authority, 6/1/58 (d) 1,843,200 7,775,000 Michigan Tobacco Settlement Finance Authority, 6.0%, 6/1/34 7,774,067 9,280,000 Michigan Tobacco Settlement Finance Authority, 6.0%, 6/1/48 9,163,536 1,250,000 Michigan Tobacco Settlement Finance Authority, 6.875%, 6/1/42 1,272,800 --------------- $ 46,251,590 ----------------------------------------------------------------------------------------------------------------- Minnesota -- 0.8% 2,000,000 Bloomington Port Authority, Radisson Blu MOA LLC, 9.0%, 12/1/35 $ 2,111,320 400,000 City of Deephaven Minnesota, Eagle Ridge Academy Project, 5.25%, 7/1/37 423,656 1,500,000 City of Deephaven Minnesota, Eagle Ridge Academy Project, 5.5%, 7/1/50 1,594,950 1,000,000 Housing & Redevelopment Authority of The City of St Paul Minnesota, 5.5%, 7/1/52 1,002,930 --------------- $ 5,132,856 ----------------------------------------------------------------------------------------------------------------- Missouri -- 1.8% 5,540,000 Community Memorial Hospital District, 6.68%, 12/1/34 $ 5,715,452 500,000 Kansas City Industrial Development Authority, 4.25%, 4/1/26 479,800 1,000,000 Kansas City Industrial Development Authority, 5.0%, 4/1/36 962,700 1,150,000 Kansas City Industrial Development Authority, 5.0%, 4/1/46 1,069,604 2,500,000 Kirkwood Industrial Development Authority, Aberdeen Hrights Series A, 8.25%, 5/15/45 2,973,300 --------------- $ 11,200,856 ----------------------------------------------------------------------------------------------------------------- New Jersey -- 1.4% 1,215,000 New Jersey Economic Development Authority, 5.25%, 7/1/37 $ 1,208,986 2,500,000 New Jersey Economic Development Authority, 5.375%, 7/1/47 2,476,125 The accompanying notes are an integral part of these financial statements. Pioneer High Income Municipal Fund | Annual Report | 8/31/17 21 Schedule of Investments | 8/31/17 (continued) ----------------------------------------------------------------------------------------------------------------- Effective Reference Principal Interest Index + Amount ($) Rate (b) Spread (c) Value ----------------------------------------------------------------------------------------------------------------- New Jersey -- (continued) 4,500,000 New Jersey Health Care Facilities Financing Authority, St. Peters University Hospital, 6.25%, 7/1/35 $ 4,932,810 --------------- $ 8,617,921 ----------------------------------------------------------------------------------------------------------------- New Mexico -- 1.6% 395,000 County of Otero New Mexico, 8.75%, 4/1/18 $ 394,238 1,430,000 County of Otero New Mexico, 9.0%, 4/1/23 1,398,154 7,970,000 9.00 County of Otero New Mexico, Floating Rate Note, 4/1/28 7,643,150 --------------- $ 9,435,542 ----------------------------------------------------------------------------------------------------------------- New York -- 5.0% 5,000,000 Nassau County Tobacco Settlement Corp., 5.125%, 6/1/46 $ 4,995,100 2,620,000 New York Counties Tobacco Trust IV, 5.0%, 6/1/45 2,490,153 9,030,000 Suffolk Tobacco Asset Securitization Corp., 6.0%, 6/1/48 9,032,619 8,000,000 Suffolk Tobacco Asset Securitization Corp., 6.6%, 6/1/44 8,448,800 10,000,000 The Erie County Industrial Development Agency, Galvstar LLC Project Series A, 10/1/30 (d) (g) 2,498,600 8,000,000 The Erie County Industrial Development Agency, Galvstar LLC Project Series B, 10/1/30 (d) (g) 1,998,880 1,795,000 The Erie County Industrial Development Agency, Galvstar LLC Project Series C, 10/1/30 (d) (g) 448,499 --------------- $ 29,912,651 ----------------------------------------------------------------------------------------------------------------- Ohio -- 5.3% 2,425,000 Buckeye Tobacco Settlement Financing Authority, 5.75%, 6/1/34 $ 2,266,066 12,000,000 Buckeye Tobacco Settlement Financing Authority, 5.875%, 6/1/47 11,451,600 9,285,000 Buckeye Tobacco Settlement Financing Authority, 6.0%, 6/1/42 8,877,760 6,335,000 Buckeye Tobacco Settlement Financing Authority, 6.5%, 6/1/47 6,303,578 2,900,000 Southeastern Ohio Port Authority, 6.0%, 12/1/42 3,189,275 --------------- $ 32,088,279 ----------------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 22 Pioneer High Income Municipal Fund | Annual Report | 8/31/17 ----------------------------------------------------------------------------------------------------------------- Effective Reference Principal Interest Index + Amount ($) Rate (b) Spread (c) Value ----------------------------------------------------------------------------------------------------------------- Pennsylvania -- 8.8% 850,000 Allegheny County Hospital Development Authority, Ohio Valley General Hospital Project A, 5.125%, 4/1/35 $ 807,440 1,000,000 Chester County Industrial Development Authority, 5.125%, 10/15/37 1,020,500 2,335,000 Chester County Industrial Development Authority, 5.25%, 10/15/47 2,378,828 8,425,000 Delaware County Industrial Development Authority Pennsylvania, 5.125%, 6/1/46 8,376,725 2,005,000 Pennsylvania Economic Development Financing Authority, US Airways Group Series A, 7.5%, 5/1/20 2,238,382 8,445,000 Pennsylvania Economic Development Financing Authority, US Airways Group Series B, 8.0%, 5/1/29 9,504,932 2,200,000 Philadelphia Authority for Industrial Development, 6.5%, 6/1/45 2,278,144 3,145,000 Philadelphia Authority for Industrial Development, 6.625%, 6/1/50 3,270,957 2,500,000 Philadelphia Authority for Industrial Development, Green Woods Charter School Projects A, 5.5%, 6/15/32 2,583,600 5,200,000 Philadelphia Authority for Industrial Development, Green Woods Charter School Projects A, 5.75%, 6/15/42 5,374,980 6,000,000 Philadelphia Authority for Industrial Development, Nueva Esperanze Inc., 8.2%, 12/1/43 6,873,420 1,000,000 Philadelphia Authority for Industrial Development, Performing Arts Charter School Project, 6.5%, 6/15/33 (144A) 1,068,820 3,000,000 Philadelphia Authority for Industrial Development, Performing Arts Charter School Project, 6.75%, 6/15/43 (144A) 3,217,890 4,000,000 The Hospitals & Higher Education Facilities Authority of Philadelphia, Temple University Health System Series A, 5.625%, 7/1/42 4,404,640 --------------- $ 53,399,258 ----------------------------------------------------------------------------------------------------------------- Puerto Rico -- 2.0% 21,000,000 Commonwealth of Puerto Rico, 8.0%, 7/1/35 (f) (g) $ 12,153,750 ----------------------------------------------------------------------------------------------------------------- Rhode Island -- 0.1% 2,065,000 Central Falls Detention Facility Corp., 7.25%, 7/15/35 (g) $ 495,394 ----------------------------------------------------------------------------------------------------------------- Tennessee -- 0.0%+ 5,000 Johnson City Health & Educational Facilities Board, Appalachian Christian Village, 5.0%, 2/15/43 $ 4,613 ----------------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer High Income Municipal Fund | Annual Report | 8/31/17 23 Schedule of Investments | 8/31/17 (continued) ----------------------------------------------------------------------------------------------------------------- Effective Reference Principal Interest Index + Amount ($) Rate (b) Spread (c) Value ----------------------------------------------------------------------------------------------------------------- Texas -- 9.6% 200,000 Arlington Higher Education Finance Corp., 5.875%, 3/1/24 $ 206,698 525,000 Arlington Higher Education Finance Corp., 6.625%, 3/1/29 545,307 375,000 Arlington Higher Education Finance Corp., 7.0%, 3/1/34 391,868 7,030,000 Arlington Higher Education Finance Corp., Universal Academy Series A, 7.125%, 3/1/44 7,335,454 375,000 City of Celina Texas, 5.375%, 9/1/28 369,349 900,000 City of Celina Texas, 5.5%, 9/1/24 891,315 250,000 City of Celina Texas, 5.5%, 9/1/32 245,350 650,000 City of Celina Texas, 5.875%, 9/1/40 635,102 1,075,000 City of Celina Texas, 6.0%, 9/1/30 1,061,659 2,700,000 City of Celina Texas, 6.25%, 9/1/40 2,700,000 500,000 City of Mclendon-Chisholm Texas, Sonoma Public Impt Dist Phase, 5.125%, 9/15/28 496,080 450,000 City of Mclendon-Chisholm Texas, Sonoma Public Impt Dist Phase, 5.375%, 9/15/35 445,126 380,000 City of Mclendon-Chisholm Texas, Sonoma Public Impt Dist Phase, 5.5%, 9/15/40 375,349 234,442 Gulf Coast Industrial Development Authority, Microgy Holdings Project, 12/1/36 (d) (g) 2 1,215,000 Kinney County Public Facilities Corp., 7.0%, 11/1/25 1,155,161 2,000,000 La Vernia Higher Education Finance Corp., Meridian World School Series A, 5.5%, 8/15/45 2,098,780 350,000 New Hope Cultural Education Facilities Finance Corp., 5.25%, 7/1/36 366,597 1,250,000 New Hope Cultural Education Facilities Finance Corp., 5.5%, 7/1/46 1,314,150 1,000,000 New Hope Cultural Education Facilities Finance Corp., 5.75%, 7/1/51 1,067,660 125,000 New Hope Cultural Education Facilities Finance Corp., 6.0%, 7/1/26 122,468 1,350,000 New Hope Cultural Education Facilities Finance Corp., 7.0%, 7/1/51 1,360,773 17,350,000 Sanger Industrial Development Corp., Texas Pellets Project Series B, 8.0%, 7/1/38 (a)(g) 8,241,250 2,250,000 Tarrant County Cultural Education Facilities Finance Corp., 4.625%, 11/15/41 1,884,892 5,000,000 Tarrant County Cultural Education Facilities Finance Corp., 4.875%, 11/15/48 4,205,950 3,500,000 Tarrant County Cultural Education Facilities Finance Corp., 6.625%, 11/15/37 3,800,930 The accompanying notes are an integral part of these financial statements. 24 Pioneer High Income Municipal Fund | Annual Report | 8/31/17 ----------------------------------------------------------------------------------------------------------------- Effective Reference Principal Interest Index + Amount ($) Rate (b) Spread (c) Value ----------------------------------------------------------------------------------------------------------------- Texas -- (continued) 500,000 Tarrant County Cultural Education Facilities Finance Corp., 8.25%, 11/15/39 $ 534,155 120,000 Tarrant County Cultural Education Facilities Finance Corp., MRC Crestview Project, 8.0%, 11/15/34 145,847 6,350,000 Tarrant County Cultural Education Facilities Finance Corp., MRC Crestview Project, 8.125%, 11/15/44 7,742,618 1,775,000 Tarrant County Cultural Education Facilities Finance Corp., Stayton at Museum Way Series A, 8.0%, 11/15/28 1,892,523 5,400,000 Tarrant County Cultural Education Facilities Finance Corp., Stayton at Museum Way Series A, 8.25%, 11/15/44 5,766,552 1,000,000 Texas Midwest Public Facility Corp., Secure Treatment Facility Project, 10/1/30 (d) (g) 349,900 --------------- $ 57,748,865 ----------------------------------------------------------------------------------------------------------------- Utah -- 2.1% 3,500,000 Utah Charter School Finance Authority, 5.375%, 6/15/48 (UT CSCE) $ 3,427,550 915,000 Utah Charter School Finance Authority, Summit Academy High School Series A, 7.25%, 5/15/21 984,082 1,985,000 Utah Charter School Finance Authority, Summit Academy High School Series A, 8.125%, 5/15/31 2,223,915 5,145,000 Utah Charter School Finance Authority, Summit Academy High School Series A, 8.5%, 5/15/41 5,815,291 --------------- $ 12,450,838 ----------------------------------------------------------------------------------------------------------------- Virginia -- 3.7% 2,100,000 Cherry Hill Community Development Authority, Potomac Shores Project, 5.4%, 3/1/45 $ 2,193,093 815,000 Embrey Mill Community Development Authority, 5.3%, 3/1/35 818,301 4,685,000 Embrey Mill Community Development Authority, 5.6%, 3/1/45 4,771,063 15,000,000 Tobacco Settlement Financing Corp. Virginia, 5.0%, 6/1/47 14,331,000 --------------- $ 22,113,457 ----------------------------------------------------------------------------------------------------------------- West Virginia -- 3.3% 25,000,000 City of Philippi West Virginia, 7.75%, 10/1/44 (g) $ 14,999,998 5,340,000 West Virginia Hospital Finance Authority, Highland Hospital Oblig Group, 9.125%, 10/1/41 (g) 4,935,228 --------------- $ 19,935,226 ----------------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer High Income Municipal Fund | Annual Report | 8/31/17 25 Schedule of Investments | 8/31/17 (continued) ----------------------------------------------------------------------------------------------------------------- Effective Reference Principal Interest Index + Amount ($) Rate (b) Spread (c) Value ----------------------------------------------------------------------------------------------------------------- Wisconsin -- 5.7% 500,000 Public Finance Authority, 4.25%, 8/1/26 $ 489,450 2,000,000 Public Finance Authority, 5.0%, 8/1/36 1,938,080 6,250,000 Public Finance Authority, 5.125%, 6/1/48 6,322,375 2,450,000 Public Finance Authority, 5.125%, 8/1/46 2,358,786 8,615,000 Public Finance Authority, Cabs-Springshire Pre-Dev Project, 12/1/20 (144A) (d) 5,873,793 1,590,000 Public Finance Authority, Coral Academy Science Las Vegas, 5.625%, 7/1/44 1,724,260 5,325,000 Public Finance Authority, Glenridge Palmer Ranch Series A, 8.25%, 6/1/46 6,282,542 5,057,500 Public Finance Authority, Las Ventanas Retirement Community, 7.0%, 10/1/42 5,067,767 1,245,000 Public Finance Authority, Voyager Foundation Inc., Project Series A, 5.125%, 10/1/45 1,268,904 2,815,000 Public Finance Authority, Voyager Foundation Inc., Project Series A, 6.2%, 10/1/42 3,011,712 --------------- $ 34,337,669 ----------------------------------------------------------------------------------------------------------------- TOTAL MUNICIPAL BONDS (Cost $591,850,322) $ 585,976,542 ----------------------------------------------------------------------------------------------------------------- MUNICIPAL COLLATERALIZED DEBT OBLIGATION -- 0.0%+ 1,175,000 0.72 Non-Profit Preferred Funding Trust I, Floating Rate Note, 9/15/37 (144A) $ 18,800 ----------------------------------------------------------------------------------------------------------------- TOTAL MUNICIPAL COLLATERALIZED DEBT OBLIGATION (Cost $1,172,707) $ 18,800 ----------------------------------------------------------------------------------------------------------------- TOTAL INVESTMENT IN UNAFFILIATED ISSUERS -- 98.4% (Cost $601,023,029) (h) $ 593,995,342 ----------------------------------------------------------------------------------------------------------------- OTHER ASSETS & LIABILITIES -- 1.6% $ 9,586,139 ----------------------------------------------------------------------------------------------------------------- NET ASSETS -- 100.0% $ 603,581,481 ================================================================================================================= + Amount rounds to less than 0.1%. (144A) Security is exempt from registration under Rule 144A of the Securities Act of 1933. Such securities may be resold normally to qualified institutional buyers in a transaction exempt from registration. At August 31, 2017, the value of these securities amounted to $18,179,303 or 3.0% of net assets. (Pre-Refunded) Pre-Refunded bonds have been collateralized by U.S. Treasury securities which are held in escrow and used to pay principal and interest on the tax-exempt issue and to retire the bonds in full at the earliest refunding date. The accompanying notes are an integral part of these financial statements. 26 Pioneer High Income Municipal Fund | Annual Report | 8/31/17 (a) Securities that used significant unobservable inputs to determine their value. (b) Debt obligation with a variable or floating interest rate. Rate shown is rate at period end. (c) Floating rate note. Reference index and spread shown at period end. (d) Security issued with a zero coupon. Income is earned through accretion of discount. (e) Consists of Revenue Bonds unless otherwise indicated. (f) Represents a General Obligation Bond. (g) Security is in default. (h) The concentration of investments by type of obligation/market sector is as follows: Revenue Bonds: Special Revenues 25.8% Health 21.3% Education 21.1% Various Revenues 8.4% General Obligation 6.8% Housing 6.6% Pollution Control Revenue 4.0% Escrowed 3.5% Transportation 2.0% Insured 0.3% Water & Sewer 0.2% ----- 100.0% ===== Purchases and sales of securities (excluding temporary cash investments) for the year ended August 31, 2017 aggregated to $201,609,607 and $236,404,170, respectively. The Fund is permitted to engage in purchase and sale transactions ("cross trades") with certain Funds and accounts for which Amundi Pioneer Asset Management, Inc., formerly Pioneer Investment Management, Inc. (the Adviser) serves as investment adviser, as set forth in Rule 17a-7 under the Investment Company Act of 1940, pursuant to procedures adopted by the Board of Trustees. Under these procedures, cross trades are effected at current market prices. During the year ended August 31, 2017, the Fund engaged in purchases and sales pursuant to these procedures amounting to $4,971,119 and $19,941,349, respectively, which resulted in a net realized gain/loss of $--. At August 31, 2017, the net unrealized depreciation on investments based on cost for federal income tax purposes of $608,768,321 was as follows: Aggregate gross unrealized appreciation for all investments in which there is an excess of value over tax cost $ 42,820,130 Aggregate gross unrealized depreciation for all investments in which there is an excess of tax cost over value (57,593,109) ------------ Net unrealized depreciation $(14,772,979) ============ Various inputs are used in determining the value of the Fund's investments. These inputs are summarized in the three broad levels listed below. Level 1 - quoted prices in active markets for identical securities. Level 2 - other significant observable inputs (including quoted prices for similar securities, interest rates, prepayment speeds, credit risk, etc.) See Notes to Financial Statements -- Note 1A. Level 3 - significant unobservable inputs (including the Fund's own assumptions in determining fair value of investments) See Notes to Financial Statements -- Note 1A. The accompanying notes are an integral part of these financial statements. Pioneer High Income Municipal Fund | Annual Report | 8/31/17 27 Schedule of Investments | 8/31/17 (continued) The following is a summary of the inputs used as of August 31, 2017, in valuing the Fund's investments: -------------------------------------------------------------------------------------- Level 1 Level 2 Level 3 Total -------------------------------------------------------------------------------------- Corporate Bond $ -- $ 8,000,000 $ -- $ 8,000,000 Municipal Bonds Texas -- -- 8,241,250 8,241,250 All Other Municipal Bonds -- 577,735,292 -- 577,735,292 Municipal Collateralized Debt Obligation -- 18,800 -- 18,800 -------------------------------------------------------------------------------------- Total $ -- $585,754,092 $ 8,241,250 $593,995,342 ====================================================================================== The following is a reconciliation of assets valued using significant unobservable inputs (Level 3): -------------------------------------------------------------------------------------- Municipal Bonds -------------------------------------------------------------------------------------- Balance as of 8/31/16 $ -- Realized gain (loss)(1) -- Change in unrealized appreciation (depreciation)(2) (6,857,414) Purchases -- Sales -- Transfers in to Level 3* 15,098,664 Transfers out of Level 3* -- Changes between Level 3* -- -------------------------------------------------------------------------------------- Balance as of 8/31/17 $ 8,241,250 ====================================================================================== (1) Realized gain (loss) on these securities is included in the net realized gain (loss) from investments in the Statement of Operations. (2) Unrealized appreciation (depreciation) on these securities is included in the change in unrealized appreciation (depreciation) on investments in the Statement of Operations. * Transfers are calculated on beginning of period values. During the year ended August 31, 2017, an investment having a value of $15,098,664 was transferred from Level 2 to Level 3. The change in the level designation within the fair value hierarchy was due to valuing the security using unobservable inputs. There were no other transfers between levels 1, 2 and 3. Net change in unrealized appreciation (depreciation) of investments still held as of 8/31/17 $(6,857,414) ------------ The accompanying notes are an integral part of these financial statements. 28 Pioneer High Income Municipal Fund | Annual Report | 8/31/17 Statement of Assets and Liabilities | 8/31/17 ASSETS: Investment in unaffiliated issuers, at value (cost $601,023,029) $593,995,342 Cash 5,081,218 Receivables -- Investment securities sold 285,000 Fund shares sold 972,486 Interest 8,979,546 Other assets 37,277 --------------------------------------------------------------------------------------- Total assets $609,350,869 ======================================================================================= LIABILITIES: Payables -- Investment securities purchased $ 3,435,110 Fund shares repurchased 1,532,521 Distributions 433,720 Trustee fees 4,021 Due to affiliates 128,374 Accrued expenses 235,642 --------------------------------------------------------------------------------------- Total liabilities $ 5,769,388 ======================================================================================= NET ASSETS: Paid-in capital $652,292,155 Undistributed net investment income 6,284,040 Accumulated net realized loss on investments (47,967,027) Net unrealized depreciation on investments (7,027,687) --------------------------------------------------------------------------------------- Net assets $603,581,481 ======================================================================================= NET ASSET VALUE PER SHARE: (No par value, unlimited number of shares authorized) Class A (based on $267,618,011/36,558,668 shares) $ 7.32 Class C (based on $143,845,858/19,642,094 shares) $ 7.32 Class Y (based on $192,117,612/26,591,204 shares) $ 7.22 MAXIMUM OFFERING PRICE: Class A ($7.32 (divided by) 95.5%) $ 7.66 ======================================================================================= The accompanying notes are an integral part of these financial statements. Pioneer High Income Municipal Fund | Annual Report | 8/31/17 29 Statement of Operations For the Year Ended 8/31/17 INVESTMENT INCOME: Interest from unaffiliated issuers $33,721,915 --------------------------------------------------------------------------------------- Total investment income $ 33,721,915 --------------------------------------------------------------------------------------- EXPENSES: Management fees $ 2,919,816 Transfer agent fees Class A 79,681 Class C 71,611 Class Y 204,614 Distribution fees Class A 664,116 Class C 1,487,479 Shareholder communications expense 19,543 Administrative expense 196,892 Custodian fees 10,488 Registration fees 77,242 Professional fees 114,955 Printing expense 32,269 Fees and expenses of nonaffiliated Trustees 24,479 Interest expense 20,323 Miscellaneous 124,561 --------------------------------------------------------------------------------------- Total expenses $ 6,048,069 --------------------------------------------------------------------------------------- Net investment income $ 27,673,846 --------------------------------------------------------------------------------------- REALIZED AND UNREALIZED GAIN (LOSS) ON INVESTMENTS: Net realized gain (loss) on: Investments from unaffiliated issuers $ 8,151,315 --------------------------------------------------------------------------------------- Change in net unrealized appreciation (depreciation) on: Investments from unaffiliated issuers $ (31,630,599) --------------------------------------------------------------------------------------- Net realized and unrealized gain (loss) on investments $ (23,479,284) --------------------------------------------------------------------------------------- Net increase in net assets resulting from operations $ 4,194,562 ======================================================================================= The accompanying notes are an integral part of these financial statements. 30 Pioneer High Income Municipal Fund | Annual Report | 8/31/17 Statements of Changes in Net Assets ------------------------------------------------------------------------------------------ Year Ended Year Ended 8/31/2017 8/31/2016* ------------------------------------------------------------------------------------------ FROM OPERATIONS: Net investment income (loss) $ 27,673,846 $ 26,751,307 Net realized gain (loss) on investments 8,151,315 1,989,101 Change in net unrealized appreciation (depreciation) on investments (31,630,599) 29,466,344 ------------------------------------------------------------------------------------------ Net increase (decrease) in net assets resulting from operations $ 4,194,562 $ 58,206,752 ------------------------------------------------------------------------------------------ DISTRIBUTIONS TO SHAREOWNERS: Net investment income: Class A ($0.36 and $0.40 per share, respectively) $ (13,103,073) $ (14,110,287) Class C ($0.30 and $0.34 per share, respectively) (6,202,431) (7,100,365) Class Y ($0.37 and $0.41 per share, respectively) (8,854,782) (8,411,972) ------------------------------------------------------------------------------------------ Total distributions to shareowners $ (28,160,286) $ (29,622,624) ------------------------------------------------------------------------------------------ FROM FUND SHARE TRANSACTIONS: Net proceeds from sale of shares $ 204,185,029 $ 207,486,927 Reinvestment of distributions 22,405,883 23,616,447 Cost of shares repurchased (249,144,004) (129,694,923) ------------------------------------------------------------------------------------------ Net increase (decrease) in net assets resulting from Fund share transactions $ (22,553,092) $ 101,408,451 ------------------------------------------------------------------------------------------ Net increase (decrease) in net assets $ (46,518,816) $ 129,992,579 NET ASSETS: Beginning of year $ 650,100,297 $ 520,107,718 ------------------------------------------------------------------------------------------ End of year $ 603,581,481 $ 650,100,297 ------------------------------------------------------------------------------------------ Undistributed net investment income $ 6,284,040 $ 6,773,545 ========================================================================================== * The Fund was audited by another independent registered public accounting firm other than Ernst & Young LLP. The accompanying notes are an integral part of these financial statements. Pioneer High Income Municipal Fund | Annual Report | 8/31/17 31 Statements of Changes in Net Assets (continued) ------------------------------------------------------------------------------------------ Year Ended Year Ended Year Ended Year Ended 8/31/2017 8/31/2017 8/31/2016 8/31/2016 Shares Amount Shares* Amount* ------------------------------------------------------------------------------------------ Class A Shares sold 9,719,821 $ 70,529,861 10,879,895 $ 80,711,420 Reinvestment of distributions 1,569,240 11,387,227 1,622,275 12,049,427 Less shares repurchased (13,192,917) (95,085,636) (8,107,638) (59,867,557) ------------------------------------------------------------------------------------------ Net increase (decrease) (1,903,856) $ (13,168,548) 4,394,532 $ 32,893,290 ========================================================================================== Class C Shares sold 2,530,254 $ 18,405,387 4,458,277 $ 33,099,836 Reinvestment of distributions 709,801 5,151,939 773,004 5,742,165 Less shares repurchased (5,444,559) (39,311,261) (3,616,789) (26,764,754) ------------------------------------------------------------------------------------------ Net increase (decrease) (2,204,504) $ (15,753,935) 1,614,492 $ 12,077,247 ========================================================================================== Class Y Shares sold 16,143,744 $ 115,249,781 12,761,015 $ 93,675,671 Reinvestment of distributions 818,582 5,866,717 793,540 5,824,855 Less shares repurchased (16,021,607) (114,747,107) (5,899,448) (43,062,612) ------------------------------------------------------------------------------------------ Net increase 940,719 $ 6,369,391 7,655,107 $ 56,437,914 ========================================================================================== * The Fund was audited by another independent registered public accounting firm other than Ernst & Young LLP. The accompanying notes are an integral part of these financial statements. 32 Pioneer High Income Municipal Fund | Annual Report | 8/31/17 Financial Highlights --------------------------------------------------------------------------------------------------------------------------- Year Year Year Year Year Ended Ended Ended Ended Ended 8/31/2017 8/31/2016** 8/31/2015** 8/31/2014** 8/31/2013 --------------------------------------------------------------------------------------------------------------------------- Class A Net asset value, beginning of period $ 7.59 $ 7.22 $ 7.27 $ 7.19 $ 7.94 --------------------------------------------------------------------------------------------------------------------------- Increase (decrease) from investment operations: Net investment income (loss) $ 0.35(a) $ 0.36(a) $ 0.41 $ 0.43 $ 0.53 Net realized and unrealized gain (loss) on investments (0.26) 0.41 (0.06) 0.09 (0.84) --------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) from investment operations $ 0.09 $ 0.77 $ 0.35 $ 0.52 $ (0.31) --------------------------------------------------------------------------------------------------------------------------- Distribution to shareowners: Net investment income $ (0.36) $ (0.40) $ (0.40) $ (0.44) $ (0.44) --------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) in net asset value $ (0.27) $ 0.37 $ (0.05) $ 0.08 $ (0.75) --------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $ 7.32 $ 7.59 $ 7.22 $ 7.27 $ 7.19 =========================================================================================================================== Total return* 1.32% 10.90% 4.88% 7.52% (4.26)% Ratio of net expenses to average net assets 0.88% 0.87% 0.89% 0.90% 0.88% Ratio of net investment income (loss) to average net assets 4.85% 4.86% 5.59% 5.97% 6.26% Portfolio turnover rate 35% 20% 29% 55% 17% Net assets, end of period (in thousands) $267,618 $292,019 $245,877 $240,331 $250,163 =========================================================================================================================== (a) The per-share data presented above is based on the average shares outstanding for the period presented. * Assumes initial investment at net asset value at the beginning of each period, reinvestment of all distributions, the complete redemption of the investment at net asset value at the end of each period and no sales charges. Total return would be reduced if sales charges were taken into account. ** The Fund was audited by another independent registered public accounting firm other than Ernst & Young LLP. The accompanying notes are an integral part of these financial statements. Pioneer High Income Municipal Fund | Annual Report | 8/31/17 33 Financial Highlights (continued) --------------------------------------------------------------------------------------------------------------------------- Year Year Year Year Year Ended Ended Ended Ended Ended 8/31/2017 8/31/2016** 8/31/2015** 8/31/2014** 8/31/2013 --------------------------------------------------------------------------------------------------------------------------- Class C Net asset value, beginning of period $ 7.59 $ 7.22 $ 7.28 $ 7.19 $ 7.94 --------------------------------------------------------------------------------------------------------------------------- Increase (decrease) from investment operations: Net investment income (loss) $ 0.30(a) $ 0.30(a) $ 0.36 $ 0.41 $ 0.46 Net realized and unrealized gain (loss) on investments (0.27) 0.41 (0.07) 0.07 (0.83) --------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) from investment operations $ 0.03 $ 0.71 $ 0.29 $ 0.48 $ (0.37) --------------------------------------------------------------------------------------------------------------------------- Distribution to shareowners: Net investment income $ (0.30) $ (0.34) $ (0.35) $ (0.39) $ (0.38) --------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) in net asset value $ (0.27) $ 0.37 $ (0.06) $ 0.09 $ (0.75) --------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $ 7.32 $ 7.59 $ 7.22 $ 7.28 $ 7.19 =========================================================================================================================== Total return* 0.55% 10.07% 3.95% 6.85% (4.98)% Ratio of net expenses to average net assets 1.65% 1.63% 1.65% 1.66% 1.63% Ratio of net investment income (loss) to average net assets 4.10% 4.10% 4.83% 5.23% 5.53% Portfolio turnover rate 35% 20% 29% 55% 17% Net assets, end of period (in thousands) $143,846 $165,883 $146,029 $149,453 $195,290 =========================================================================================================================== (a) The per-share data presented above is based on the average shares outstanding for the period presented. * Assumes initial investment at net asset value at the beginning of each period, reinvestment of all distributions, the complete redemption of the investment at net asset value at the end of each period and no sales charges. Total return would be reduced if sales charges were taken into account. ** The Fund was audited by another independent registered public accounting firm other than Ernst & Young LLP. The accompanying notes are an integral part of these financial statements. 34 Pioneer High Income Municipal Fund | Annual Report | 8/31/17 --------------------------------------------------------------------------------------------------------------------------- Year Year Year Year Year Ended Ended Ended Ended Ended 8/31/2017 8/31/2016** 8/31/2015** 8/31/2014** 8/31/2013 --------------------------------------------------------------------------------------------------------------------------- Class Y Net asset value, beginning of period $ 7.49 $ 7.12 $ 7.18 $ 7.10 $ 7.84 --------------------------------------------------------------------------------------------------------------------------- Increase (decrease) from investment operations: Net investment income (loss) $ 0.36(a) $ 0.37(a) $ 0.39 $ 0.46 $ 0.53 Net realized and unrealized gain (loss) on investments (0.26) 0.41 (0.04) 0.07 (0.82) --------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) from investment operations $ 0.10 $ 0.78 $ 0.35 $ 0.53 $ (0.29) --------------------------------------------------------------------------------------------------------------------------- Distribution to shareowners: Net investment income $ (0.37) $ (0.41) $ (0.41) $ (0.45) $ (0.45) --------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) in net asset value $ (0.27) $ 0.37 $ (0.06) $ 0.08 $ (0.74) --------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $ 7.22 $ 7.49 $ 7.12 $ 7.18 $ 7.10 =========================================================================================================================== Total return* 1.45% 11.17% 4.92% 7.69% (4.05)% Ratio of net expenses to average net assets 0.72% 0.71% 0.71% 0.71% 0.72% Ratio of net investment income (loss) to average net assets 4.99% 5.01% 5.77% 6.17% 6.40% Portfolio turnover rate 35% 20% 29% 55% 17% Net assets, end of period (in thousands) $192,118 $192,198 $128,202 $100,199 $119,658 =========================================================================================================================== (a) The per-share data presented above is based on the average shares outstanding for the period presented. * Assumes initial investment at net asset value at the beginning of each period, reinvestment of all distributions and the complete redemption of the investment at net asset value at the end of each period. ** The Fund was audited by another independent registered public accounting firm other than Ernst & Young LLP. The accompanying notes are an integral part of these financial statements. Pioneer High Income Municipal Fund | Annual Report | 8/31/17 35 Notes to Financial Statements | 8/31/17 1. Organization and Significant Accounting Policies Pioneer High Income Municipal Fund (the Fund) is one of three portfolios comprising Pioneer Series Trust V, a Delaware statutory trust. The Fund is registered under the Investment Company Act of 1940 as an open-end management investment company. The Fund is non-diversified. The investment objective of the Fund is to maximize total return through a combination of income that is exempt from regular federal income tax and capital appreciation. The Fund offers three classes of shares designated as Class A, Class C and Class Y shares. Each class of shares represents an interest in the same portfolio of investments of the Fund and has identical rights (based on relative net asset values) to assets and liquidation proceeds. Share classes can bear different rates of class-specific fees and expenses such as transfer agent and distribution fees. Differences in class-specific fees and expenses will result in differences in net investment income and, therefore, the payment of different dividends from net investment income earned by each class. The Amended and Restated Declaration of Trust of the Fund gives the Board of Trustees the flexibility to specify either per-share voting or dollar-weighted voting when submitting matters for shareholder approval. Under per-share voting, each share of a class of the Fund is entitled to one vote. Under dollar-weighted voting, a shareholder's voting power is determined not by the number of shares owned, but by the dollar value of the shares on the record date. Each share class has exclusive voting rights with respect to matters affecting only that class, including with respect to the distribution plan for that class. There is no distribution plan for Class Y shares. On July 3, 2017, Amundi acquired Pioneer Investments, a group of asset management companies located throughout the world. Amundi, one of the world's largest asset managers, is headquartered in Paris, France. As a result of the transaction, Pioneer Investment Management, Inc., the Fund's investment adviser, became an indirect wholly owned subsidiary of Amundi and Amundi's wholly owned subsidiary, Amundi USA, Inc. Prior to July 3, 2017, Pioneer Investments was owned by Pioneer Global Asset Management S.p.A., a wholly owned subsidiary of UniCredit S.p.A. In connection with the transaction, the names of the Fund's investment adviser and principal underwriter changed. Effective July 3, 2017, the name of Pioneer Investment Management, Inc. changed to Amundi Pioneer Asset Management, Inc. (the Adviser) and the name of Pioneer Funds Distributor, Inc. changed to Amundi Pioneer Distributor, Inc. (the Distributor). 36 Pioneer High Income Municipal Fund | Annual Report | 8/31/17 In October 2016, the Securities and Exchange Commission (SEC) released its Final Rule on Investment Company Reporting Modernization. In addition to introducing two new regulatory reporting forms (Form N-PORT and Form N-CEN), the Final Rule amends Regulation S-X, which impacts financial statement presentation, particularly related to the presentation of derivative investments. Financial statements with a period end date on or after August 1, 2017 are required to be in compliance with the amendments to Regulation S-X. The Fund's financial statements were prepared in compliance with the amendments to Regulation S-X. The Fund's financial statements have been prepared in conformity with U.S. generally accepted accounting principles (U.S. GAAP) that require the management of the Fund to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of income, expenses and gain or loss on investments during the reporting period. Actual results could differ from those estimates. The Fund is an investment company and follows investment company accounting and reporting guidance under U.S. GAAP. The following is a summary of significant accounting policies followed by the Fund in the preparation of its financial statements: A. Security Valuation The net asset value of the Fund is computed once daily, on each day the New York Stock Exchange (NYSE) is open, as of the close of regular trading on the NYSE. Fixed-income securities are valued by using prices supplied by independent pricing services, which consider such factors as market prices, market events, quotations from one or more brokers, Treasury spreads, yields, maturities and ratings, or may use a pricing matrix or other fair value methods or techniques to provide an estimated value of the security or instrument. A pricing matrix is a means of valuing a debt security on the basis of current market prices for other debt securities, historical trading patterns in the market for fixed-income securities and/or other factors. Non-U.S. debt securities that are listed on an exchange will be valued at the bid price obtained from an independent third party pricing service. When independent third party pricing services are unable to supply prices, or when prices or market quotations are considered to be unreliable, the value of that security may be determined using quotations from one or more broker-dealers. Cash may include overnight time deposits at approved financial institutions. Pioneer High Income Municipal Fund | Annual Report | 8/31/17 37 Securities or loan interests for which independent pricing services or broker dealers are unable to supply prices or for which market prices and/or quotations are not readily available or are considered to be unreliable are valued by a fair valuation team comprised of certain personnel of the Adviser pursuant to procedures adopted by the Fund's Board of Trustees. The Adviser's fair valuation team uses fair value methods approved by the Valuation Committee of the Board of Trustees. The Adviser's fair valuation team is responsible for monitoring developments that may impact fair valued securities and for discussing and assessing fair values on an ongoing basis, and at least quarterly, with the Valuation Committee of the Board of Trustees. Inputs used when applying fair value methods to value a security may include credit ratings, the financial condition of the company, current market conditions and comparable securities. The Fund may use fair value methods if it is determined that a significant event has occurred after the close of the exchange or market on which the security trades and prior to the determination of the Fund's net asset value. Examples of a significant event might include political or economic news, corporate restructurings, natural disasters, terrorist activity or trading halts. Thus, the valuation of the Fund's securities may differ significantly from exchange prices, and such differences could be material. At August 31, 2017, one security was valued using fair value methods (in addition to securities valued using prices supplied by independent pricing services, broker-dealers or using a third party insurance industry pricing model) representing 1.4% of net assets. B. Investment Income and Transactions Discount and premium on purchase prices of debt securities are accreted or amortized, respectively, daily into interest income on a yield-to-maturity basis over the life of the respective security with a corresponding increase or decrease in the cost basis of the security. Interest income, including interest on income-bearing cash accounts, is recorded on the accrual basis. Interest and dividend income payable by delivery of additional shares is reclassified as PIK (payment-in-kind) income upon receipt and is included in interest and dividend income, respectively. Security transactions are recorded as of trade date. Gains and losses on sales of investments are calculated on the identified cost method for both financial reporting and federal income tax purposes. 38 Pioneer High Income Municipal Fund | Annual Report | 8/31/17 C. Federal Income Taxes It is the Fund's policy to comply with the requirements of the Internal Revenue Code applicable to regulated investment companies and to distribute all of its taxable income and net realized capital gains, if any, to its shareowners. Therefore, no provision for federal income taxes is required. As of August 31, 2017, the Fund did not accrue any interest or penalties with respect to uncertain tax positions, which, if applicable, would be recorded as an income tax expense in the Statement of Operations. Tax returns filed within the prior three years remain subject to examination by Federal and State tax authorities. The amount and character of income and capital gain distributions to shareowners are determined in accordance with federal income tax rules, which may differ from U.S. GAAP. Distributions in excess of net investment income or net realized gains are temporary overdistributions for financial statement purposes resulting from differences in the recognition or classification of income or distributions for financial statement and tax purposes. Capital accounts within the financial statements are adjusted for permanent book/tax differences to reflect tax character, but are not adjusted for temporary differences. At August 31, 2017, the Fund reclassified $3,065 to decrease undistributed net investment income, $2,640,380 to decrease paid-in capital and $2,643,445 to decrease accumulated net realized loss on investments to reflect permanent book/tax differences. These adjustments have no impact on net assets or the results of operations. At August 31, 2017, the Fund was permitted to carry forward indefinitely $20,705,114 of short-term losses and $21,209,664 of long-term losses under the Regulated Investment Company Modernization Act of 2010 without limitation. Additionally, at August 31, 2017, the Fund had a net capital loss carryforward of $6,008,768 which will expire in 2018 if not utilized. Since new losses are required to be used first, loss carryforwards that are subject to expiration may be more likely to expire unused. During the year ended August 31, 2017, a capital loss carryforward of $8,137,898 was utilized to offset net realized gains by the Fund. The tax character of distributions paid during the years ended August 31, 2017 and August 31, 2016 was as follows: --------------------------------------------------------------------------- 2017 2016 --------------------------------------------------------------------------- Distributions paid from: Tax-exempt income $27,065,739 $28,998,856 Ordinary income 1,094,547 623,768 --------------------------------------------------------------------------- Total $28,160,286 $29,622,624 =========================================================================== Pioneer High Income Municipal Fund | Annual Report | 8/31/17 39 The following shows the components of distributable earnings on a federal income tax basis at August 31, 2017: --------------------------------------------------------------------------- 2017 --------------------------------------------------------------------------- Distributable earnings: Undistributed tax-exempt income $ 14,419,571 Capital loss carryforward (47,923,546) Current year dividend payable (433,720) Net unrealized depreciation (14,772,979) --------------------------------------------------------------------------- Total $(48,710,674) =========================================================================== The difference between book-basis and tax-basis net unrealized depreciation is attributable to adjustments related to interest on defaulted bonds, the tax treatment of amortization and tax-basis adjustments on partnerships. D. Fund Shares The Fund records sales and repurchases of its shares as of trade date. The Distributor earned $76,890 in underwriting commissions on the sale of Class A shares during the year ended August 31, 2017. E. Class Allocations Income, common expenses and realized and unrealized gains and losses are calculated at the Fund level and allocated daily to each class of shares based on its respective percentage of adjusted net assets at the beginning of the day. Distribution fees are calculated based on the average daily net asset value attributable to Class A and Class C shares of the Fund, respectively (see Note 4). Class Y shares do not pay distribution fees. All expenses and fees paid to the Fund's transfer agent for its services are allocated among the classes of shares based on the number of accounts in each class and the ratable allocation of related out-of-pocket expenses (see Note 3). The Fund declares, as daily dividends, substantially all of its net investment income. All dividends are paid on a monthly basis. Short-term capital gain distributions, if any, may be declared with the daily dividends. Distributions to shareowners are recorded as of the ex-dividend date. Distributions paid by the Fund with respect to each class of shares are calculated in the same manner and at the same time, except that net investment income dividends to Class A, Class C, and Class Y shares can reflect different transfer agent and distribution expense rates. 40 Pioneer High Income Municipal Fund | Annual Report | 8/31/17 F. Risks Interest rates in the U.S. recently have been historically low, so the Fund faces a heightened risk that interest rates may rise. A general rise in interest rates may cause investors to move out of fixed-income securities on a large scale, which could adversely affect the price and liquidity of fixed-income securities and could also result in increased redemptions from the Fund. The municipal bond market can be susceptible to unusual volatility, particularly for lower-rated and unrated securities. Liquidity can be reduced unpredictably in response to overall economic conditions or credit tightening. Municipal issuers may be adversely affected by rising health care costs, increasing unfunded pension liabilities, and by the phasing out of federal programs providing financial support. Unfavorable conditions and developments relating to projects financed with municipal securities can result in lower revenues to issuers of municipal securities, potentially resulting in defaults. Issuers often depend on revenues from these projects to make principal and interest payments. The value of municipal securities can also be adversely affected by changes in the financial condition of one or more individual municipal issuers or insurers of municipal issuers, regulatory and political developments, tax law changes or other legislative actions, and by uncertainties and public perceptions concerning these and other factors. Municipal securities may be more susceptible to downgrades or defaults during recessions or similar periods of economic stress. In recent periods, an increasing number of municipal issuers in the United States have defaulted on obligations and commenced insolvency proceedings. Financial difficulties of municipal issuers may continue or get worse. To the extent the Fund invests significantly in a single state, including California and Texas, or in securities the payments on which are dependent upon a single project or source of revenues, or that relate to a sector or industry, including health care facilities, education, transportation, special revenues and pollution control, the Fund will be more susceptible to associated risks and developments. At times, the Fund's investments may represent industries or industry sectors that are interrelated or have common risks, making the Fund more susceptible to any economic, political, or regulatory developments or other risks affecting those industries and sectors. The Fund's prospectus contains unaudited information regarding the Fund's principal risks. Please refer to that document when considering the Fund's principal risks. Pioneer High Income Municipal Fund | Annual Report | 8/31/17 41 2. Management Agreement The Adviser manages the Fund's portfolio. Management fees are calculated daily at the annual rate equal to 0.50% of the Fund's average daily net assets up to $500 million, 0.475% of the next $500 million of the Fund's average daily net assets and 0.45% of the Fund's average daily net assets over $1 billion. For the year ended August 31, 2017, the effective management fee (excluding waivers and/or assumption of expenses) was equivalent to 0.50% of the Fund's average daily net assets. The Adviser has contractually agreed to limit ordinary operating expenses (excluding taxes, commissions, interest and extraordinary expenses) of the Fund to the extent required to reduce Fund expenses to 0.90% of the average daily net assets attributable to Class A shares. Class C and Class Y shares do not have an expense limitation. Fees waived and expenses reimbursed, if any, during the year ended August 31, 2017 are reflected on the Statement of Operations. This expense limitation is in effect through January 1, 2019, for Class A shares. There can be no assurance that the Adviser will extend the expense limitation agreement beyond the date referred to above. In addition, under the management and administration agreements, certain other services and costs, including accounting, regulatory reporting and insurance premiums, are paid by the Fund as administrative reimbursements. Included in "Due to affiliates" reflected on the Statement of Assets and Liabilities is $76,661 in management fees, administrative costs and certain other reimbursements payable to the Adviser at August 31, 2017. 3. Transfer Agent Boston Financial Data Services, Inc. serves as the transfer agent to the Fund at negotiated rates. Transfer agent fees and payables shown on the Statement of Operations and the Statement of Assets and Liabilities, respectively, include sub-transfer agent expenses incurred through the Fund's omnibus relationship contracts. In addition, the Fund reimbursed the transfer agent for out-of-pocket expenses incurred by the transfer agent related to shareholder communications activities such as proxy and statement mailings and outgoing phone calls. For the year ended August 31, 2017, such out-of-pocket expenses by class of shares were as follows: -------------------------------------------------------------------------------- Shareholder Communications: -------------------------------------------------------------------------------- Class A $ 5,139 Class C 2,742 Class Y 11,662 -------------------------------------------------------------------------------- Total $19,543 ================================================================================ 42 Pioneer High Income Municipal Fund | Annual Report | 8/31/17 4. Distribution Plan The Fund has adopted a distribution plan pursuant to Rule 12b-1 of the Investment Company Act of 1940 with respect to its Class A and Class C shares (the Plan). Pursuant to the Plan, the Fund pays the Distributor 0.25% of the average daily net assets attributable to Class A shares as compensation for personal services and/or account maintenance services or distribution services with regard to Class A shares. Pursuant to the Plan, the Fund also pays the Distributor 1.00% of the average daily net assets attributable to Class C shares. The fee for Class C shares consists of a 0.25% service fee and a 0.75% distribution fee paid as compensation for personal services and/or account maintenance services or distribution services with regard to Class C shares. Included in "Due to affiliates" reflected on the Statement of Assets and Liabilities is $51,713 in distribution fees payable to the Distributor at August 31, 2017. In addition, redemptions of each class of shares (except Class Y shares) may be subject to a contingent deferred sales charge (CDSC). A CDSC of 1.00% may be imposed on redemptions of certain net asset value purchases of Class A shares within 12 months of purchase. Redemptions of Class C shares within 12 months of purchase are subject to a CDSC of 1.00%, based on the lower of cost or market value of shares being redeemed. Shares purchased as part of an exchange remain subject to any CDSC that applied to the original purchase of those shares. There is no CDSC for Class Y shares. Proceeds from the CDSCs are paid to the Distributor. For the year ended August 31, 2017, CDSCs in the amount of $56,773 were paid to the Distributor. 5. Line of Credit Facility The Fund, along with certain other funds in the Pioneer Family of Funds (the Funds), participates in a committed, unsecured revolving line of credit facility. Borrowings are used solely for temporary or emergency purposes. The Fund may borrow up to the lesser of the amount available under the facility or the limits set for borrowing by the Fund's prospectus and the 1940 Act. The credit facility in which the Fund participated until February 9, 2016 was in the amount of $240 million. The credit facility in which the Fund participated until February 7, 2017, was in the amount of $220 million. Effective February 8, 2017, the Fund participates in a facility that is in the amount of $195 million. Under such facility, depending on the type of loan, interest on borrowings is payable at the London Interbank Offered Rate (LIBOR) plus 0.85% on an annualized basis, or the Alternate Base Rate, which is the greater of (a) the facility's administrative agent's daily announced prime rate on the borrowing date, (b) 2% plus the Federal Funds Rate on the borrowing date or (c) 2% plus Pioneer High Income Municipal Fund | Annual Report | 8/31/17 43 the overnight Eurodollar rate on the borrowing date. The Funds pay an annual commitment fee to participate in a credit facility. The commitment fee is allocated among participating Funds based on an allocation schedule set forth in the credit agreement. For the year ended August 31, 2017, the average daily amount of borrowings outstanding during the period was $10,373,684. The related weighted average annualized interest rate for the period was 1.30%, and the total interest expense on such borrowings was $20,323, which is included in interest expense, located on the Statement of Operations. As of August 31, 2017, there were no borrowings outstanding. 6. Results of Shareholder Meeting At a special meeting held on June 13, 2017, shareholders of the Fund were asked to consider the proposals described below. A report of the total votes cast by the Fund's shareholders (or, with respect to Proposal 2, by shareholders of Pioneer Series Trust V, as noted below) follows: ------------------------------------------------------------------------------------------ For Against Abstain Broker Non-Votes ------------------------------------------------------------------------------------------ Proposal 1 - To approve 30,786,223.133 730,136.976 1,026,611.200 12,522,400.700 an New Management Agreement with the Adviser ------------------------------------------------------------------------------------------ For Withhold ------------------------------------------------------------------------------------------ Proposal 2 - To elect Trustees* ------------------------------------------------------------------------------------------ David R. Bock 52,906,413.845 1,033,842.093 ------------------------------------------------------------------------------------------ Benjamin M. Friedman 52,887,736.342 1,052,519.596 ------------------------------------------------------------------------------------------ Margaret B.W. Graham 52,932,507.056 1,007,748.882 ------------------------------------------------------------------------------------------ Lisa M. Jones 52,966,747.756 973,508.182 ------------------------------------------------------------------------------------------ Lorraine H. Monchak 52,946,675.492 993,580.446 ------------------------------------------------------------------------------------------ Thomas J. Perna 52,911,994.971 1,028,260.967 ------------------------------------------------------------------------------------------ Marguerite A. Piret 52,949,595.338 990,660.600 ------------------------------------------------------------------------------------------ Fred J. Ricciardi 52,895,139.856 1,045,116.082 ------------------------------------------------------------------------------------------ Kenneth J. Taubes 52,940,075.518 1,000,180.420 ------------------------------------------------------------------------------------------ * Proposal 2 was voted on and approved by all series of Pioneer Series Trust V. Results reported above reflect the combined votes of all series of the Trust. 44 Pioneer High Income Municipal Fund | Annual Report | 8/31/17 Report of Independent Registered Public Accounting Firm To the Board of Trustees of Pioneer Series Trust V and the Shareholders of Pioneer High Income Municipal Fund: -------------------------------------------------------------------------------- We have audited the accompanying statement of assets and liabilities of Pioneer High Income Municipal Fund (the "Fund"), one of the funds constituting Pioneer Series Trust V (the "Trust"), including the schedule of investments, as of August 31, 2017, and the related statements of operations, changes in net assets and the financial highlights for the year then ended and the financial highlights for the year ended August 31, 2013. These financial statements and financial highlights are the responsibility of the Fund's management. Our responsibility is to express an opinion on these financial statements and financial highlights based on our audit. The statement of changes in net assets for the year ended August 31, 2016 and the financial highlights in the periods ended August 31, 2014, August 31, 2015 and August 31, 2016 were audited by another independent registered public accounting firm whose report, dated October 24, 2016, expressed an unqualified opinion on the statement of changes in net assets and those financial highlights. We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements and financial highlights are free of material misstatement. We were not engaged to perform an audit of the Fund's internal control over financial reporting. Our audit included consideration of internal control over financial reporting as a basis for designing audit procedures that are appropriate in the circumstances, but not for the purpose of expressing an opinion on the effectiveness of the Fund's internal control over financial reporting. Accordingly, we express no such opinion. An audit also includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements and financial highlights, assessing the accounting principles used and significant estimates made by management, and evaluating the overall financial statement presentation. Our procedures included confirmation of securities owned as of August 31, 2017, by correspondence with the custodian, brokers and others or by other appropriate auditing procedures where replies from brokers and others were not received. We believe that our audits provide a reasonable basis for our opinion. In our opinion, the financial statements and financial highlights referred to above present fairly, in all material respects, the financial position of Pioneer High Income Municipal Fund at August 31, 2017, the results of its operations, the changes in its net assets and the financial highlights for the year then ended and the financial highlights for the year ended August 31, 2013 in conformity with U.S. generally accepted accounting principles. /s/ Ernst & Young LLP Boston, Massachusetts October 27, 2017 Pioneer High Income Municipal Fund | Annual Report | 8/31/17 45 ADDITIONAL INFORMATION (unaudited) The percentages of the Fund's ordinary income distributions that are exempt from nonresident alien (NRA) tax withholding resulting from qualified interest income was 88.03%. Change in Independent Registered Public Accounting Firm Prior to July 3, 2017 Pioneer Investment Management, Inc. (the "Adviser"), the Fund's investment adviser, was an indirect, wholly owned subsidiary of UniCredit S.p.A. ("UniCredit"). On that date, UniCredit completed the sale of its Pioneer Investments business, which includes the Adviser, to Amundi (the "Transaction"). As a result of the Transaction, the Adviser became an indirect, wholly-owned subsidiary of Amundi. Amundi is controlled by Credit Agricole S.A. Amundi is headquartered in Paris, France, and, as of September 30, 2016, had more than $1.1 trillion in assets under management worldwide. Deloitte & Touche LLP ("D&T"), the Fund's previous independent registered public accounting firm, informed the Audit Committee and the Board that it would no longer be independent with respect to the Fund upon the completion of the Transaction as a result of certain services being provided to Amundi and Credit Agricole, and, accordingly, that it intended to resign as the Fund's independent registered public accounting firm upon the completion of the Transaction. D&T's resignation was effective on July 3, 2017, when the Transaction was completed. During the periods as to which D&T has served as the Fund's independent registered public accounting firm, including the Fund's two most recent fiscal years preceding the fiscal year ended August 31, 2017, D&T's reports on the Fund's financial statements have not contained an adverse opinion or disclaimer of opinion and have not been qualified or modified as to uncertainty, audit scope or accounting principles. Further, there have been no disagreements with D&T on any matter of accounting principles or practices, financial statement disclosure, or auditing scope or procedure, which, if not resolved to the satisfaction of D&T, would have caused D&T to make reference to the subject matter of the disagreement in connection with its report on the financial statements. In addition, there have been no reportable events of the kind described in Item 304(a)(1)(v) of Regulation S-K under the Securities Exchange Act of 1934. Effective immediately following the completion of the Transaction on July 3, 2017, the Board, acting upon the recommendation of the Audit Committee, engaged a new independent registered public accounting firm, Ernst & Young LLP ("EY"), for the Fund's fiscal year ended August 31, 2017. 46 Pioneer High Income Municipal Fund | Annual Report | 8/31/17 Prior to its engagement, EY had advised the Fund's Audit Committee that EY had identified the following matters, in each case relating to services rendered by other member firms of Ernst & Young Global Limited, all of which are located outside the United States, to UniCredit and certain of its subsidiaries during the period commencing July 1, 2016, that it determined to be inconsistent with the auditor independence rules set forth by the Securities and Exchange Commission ("SEC"): (a) project management support services to UniCredit in the Czech Republic, Germany, Italy, Serbia and Slovenia in relation to twenty-two projects, that were determined to be inconsistent with Rule 2-01(c)(4)(vi) of Regulation S-X (management functions); (b) two engagements for UniCredit in Italy where fees were contingent/success based and that were determined to be inconsistent with Rule 2-01(c)(5) of Regulation S-X (contingent fees); (c) four engagements where legal and expert services were provided to UniCredit in the Czech Republic and Germany, and twenty engagements where the legal advisory services were provided to UniCredit in Austria, Czech Republic, Italy and Poland, that were determined to be inconsistent with Rule 2-01(c)(4)(ix) and (x) of Regulation S-X (legal and expert services); and (d) two engagements for UniCredit in Italy involving assistance in the sale of certain assets, that were determined to be inconsistent with Rule 2-01(c)(4)(viii) of Regulation S-X (broker-dealer, investment advisor or investment banking services). None of the foregoing services involved the Fund, any of the other funds in the Pioneer Family of Funds or any other Pioneer entity sold by UniCredit in the Transaction. EY advised the Audit Committee that it had considered the matters described above and had concluded that such matters would not impair EY's ability to exercise objective and impartial judgment in connection with the audits of the financial statements of the Fund under the SEC and Public Company Accounting Oversight Board independence rules, and that a reasonable investor with knowledge of all relevant facts and circumstances would reach the same conclusion. Management and the Audit Committee considered these matters and discussed the matters with EY and, based upon EY's description of the matters and statements made by EY, Management and the Audit Committee believe that EY will be capable of exercising objective and impartial judgment in connection with the audits of the financial statements of the Fund, and Management further believes that a reasonable investor with knowledge of all relevant facts and circumstances would reach the same conclusion. Pioneer High Income Municipal Fund | Annual Report | 8/31/17 47 Approval of New and Interim Management Agreements Amundi Pioneer Asset Management, Inc. (Amundi Pioneer), formerly Pioneer Investment Management, Inc., serves as the investment adviser to Pioneer High Income Municipal Fund (the Fund) pursuant to an investment management agreement between Amundi Pioneer and the Fund. On July 3, 2017, Amundi acquired Pioneer Investments, a group of asset management companies located throughout the world (the "Transaction"). As a result of the Transaction, Amundi Pioneer became an indirect wholly-owned subsidiary of Amundi and Amundi's wholly-owned subsidiary, Amundi USA, Inc. Prior to July 3, 2017, Pioneer Investments was owned by Pioneer Global Asset Management S.p.A. ("PGAM"), a wholly-owned subsidiary of UniCredit S.p.A. ("UniCredit"). Under the Investment Company Act of 1940, the Fund's current investment management agreement (the "Current Management Agreement") terminated automatically upon the consummation of the Transaction. In order for Amundi Pioneer to continue to manage the Fund after the consummation of the Transaction, the Trustees and shareholders of the Fund were required to approve a new investment management agreement for the Fund (the "New Management Agreement"). As discussed below, the Board of Trustees of the Fund approved the New Management Agreement at a meeting held on March 6-7, 2017. The New Management Agreement was approved by the shareholders of the Fund at a meeting held on June 13, 2017. The Board of Trustees of the Fund also approved an interim investment management agreement between Amundi Pioneer and the Fund (the "Interim Management Agreement") at the March 6-7, 2017 meeting. The Interim Management Agreement would have taken effect upon the closing of the Transaction in the event that the shareholders of the Fund did not approve the New Management Agreement. Board Evaluation of the New and Interim Management Agreements The Board evaluated the Transaction and the New Management Agreement and Interim Management Agreement for the Fund. In connection with their evaluation of the Transaction and the New Management Agreement for the Fund, the Trustees requested such information as they deemed reasonably necessary, including: (a) the structure of the Transaction and the strategy underlying the Transaction; (b) the anticipated benefits of the Transaction to the Fund and its shareholders; (c) the post-Transaction plans for Amundi Pioneer, including Amundi's plans for integration of Pioneer Investments and Amundi Pioneer with its existing asset management businesses and plans for the future development of Amundi Pioneer; (d) the effect of the Transaction on the ongoing services provided to the Fund, including the need to select a 48 Pioneer High Income Municipal Fund | Annual Report | 8/31/17 new independent registered public accounting firm for the Fund, and any plans to modify the operations of the Fund; (e) the stability and continuity of Amundi Pioneer's management and key employees, including compensation and benefits to Amundi Pioneer's key employees, and retention plans and incentive plan structure; (f) the post-Transaction indebtedness and financial resources of Amundi Pioneer; (g) Amundi's legal and operational structure, its principal shareholders and senior management, its investment management, risk management, administrative, legal and compliance functions; (h) certain regulatory matters relating to Amundi's affiliates; and (i) Amundi's commitment to the United States, including the role of Amundi Pioneer in the larger Amundi business. The Trustees also requested and obtained the following information in connection with their evaluation of the Transaction and the New Management Agreement for the Fund: (i) memoranda provided by Fund counsel that summarized the legal standards and other considerations that are relevant to the Trustees in their deliberations regarding the New Management Agreement; (ii) the qualifications of the investment management teams for the Fund, as well as the level of investment by the Fund's portfolio managers in the Fund; (iii) the Fund's management fees and total expense ratios, the financial statements of Amundi Pioneer and its pre- and post-Transaction parent companies, profitability analyses from Amundi Pioneer, and analyses from Amundi Pioneer as to possible economies of scale; (iv) the profitability of the institutional business of Amundi Pioneer and Amundi Pioneer's affiliate, Amundi Pioneer Institutional Asset Management, Inc. ("Amundi Pioneer Institutional") as compared to that of Amundi Pioneer's fund management business; and (v) the differences between the fees and expenses of the Fund and the fees and expenses of Amundi Pioneer's and Amundi Pioneer Institutional's institutional accounts, as well as the different services provided by Adviser to the Fund and by Amundi Pioneer and Amundi Pioneer Institutional to the institutional accounts. In addition, the Trustees considered the information provided at regularly scheduled meetings throughout the year regarding the Fund's performance and risk attributes, including through meetings with investment management personnel, and took into account other information related to the Fund provided to the Trustees at regularly scheduled meetings. The Trustees also considered information they had received in their review of the continuance of the Current Management Agreement for the Fund in September 2016. At meetings held on January 9, 2017 and January 10, 2017, the Trustees met with representatives of Amundi and PGAM, including separate meetings of the Trustees who are not "interested persons" of the Fund Complex ("Independent Trustees") and counsel with representatives of Amundi and PGAM, and subsequently with representatives of Amundi. In those meetings, Pioneer High Income Municipal Fund | Annual Report | 8/31/17 49 they received an extensive presentation from the representatives of Amundi, including the chief executive officer of Amundi, describing Amundi's background and history, its global asset management activities, the growth of its business, and its status as the largest asset management firm in Europe and one of the largest globally; its capital structure and financial resources, including information as to the financing of the Transaction; its principal investors, including its majority investor Credit Agricole S.A., and Credit Agricole's long-term commitment to the asset management business; the philosophy and strategy underlying the Transaction and the complementarity of Amundi's and Pioneer Investments' respective asset management businesses; Amundi's various operating and investment committees and how they would likely interact with Amundi Pioneer; the proposed integration process, including the progress to date and the establishment of various integration work streams; Amundi's plans for management of Amundi Pioneer; Amundi's philosophy as to compensation of key employees and its general intentions with respect to incentive plans for key employees of Amundi Pioneer; Amundi's preliminary plans to achieve cost and other synergies; and opportunities to further develop the business of Amundi Pioneer and Amundi Pioneer Institutional, including in the area of institutional asset management, and how that would benefit shareholders of the Pioneer Funds. In those meetings, the representatives of Amundi confirmed their intention that the Chief Executive Officer and Chief Investment Officer of Amundi Pioneer would remain in their current positions, and confirmed that they do not currently foresee major changes in the day-to-day investment management operations of Amundi Pioneer with respect to the Fund as a direct result of the Transaction. They discussed incentive arrangements for key personnel that would continue after the closing of the Transaction and their plans to establish a new long-term incentive plan following the closing. They also generally discussed ways in which Amundi Pioneer could potentially draw on the expanded global resources of Amundi post-Transaction. At those meetings, the Independent Trustees identified certain areas to which they requested further information, including as to trading and execution of securities transactions, research and portfolio management and potential changes in investment process, particularly where asset classes managed by Amundi Pioneer would overlap with asset classes managed by Amundi, the continued availability of resources currently at Pioneer Investments or elsewhere within Amundi to assist in management of certain Funds, and any anticipated significant changes in operations. The Independent Trustees considered the uncertainty as to whether the Fund's independent registered public accounting firm could continue to act in that capacity after the closing of the Transaction. The Independent Trustees also met with counsel to review the information they had received to date and to discuss next steps. 50 Pioneer High Income Municipal Fund | Annual Report | 8/31/17 Subsequently, the Trustees received further information from Amundi, including written responses to questions raised by the Independent Trustees, and received from Amundi Pioneer the information requested of it. The Independent Trustees reviewed the information provided with counsel at telephonic meetings held on February 16, 2017 and February 27, 2017. The Trustees held a special in-person Board meeting on March 6-7, 2017 for further consideration of the New Management Agreements, the Interim Management Agreements and the Transaction. The Trustees met again with senior executives of Amundi at the March 6-7, 2017 meeting. At the March 6-7, 2017 meeting, based on their evaluation of the information provided by Amundi Pioneer and Amundi, the Trustees including the Independent Trustees voting separately, approved the New Management Agreement and the Interim Management Agreement for the Fund. In considering the New Management Agreement for the Fund, the Trustees considered various factors that they determined were relevant, including the factors described below. The Trustees did not identify any single factor as the controlling factor in their determinations. The Trustees considered the same factors with respect to the Interim Management Agreement for the Fund. Nature, Extent and Quality of Services The Trustees considered the nature, extent and quality of the services that had been provided by Amundi Pioneer to the Fund and that are expected to be provided by Amundi Pioneer to the Fund following the consummation of the Transaction. The Trustees reviewed the terms of the New Management Agreement, and noted that such terms are substantially similar to the terms of the Current Management Agreement, except for different execution dates, effective dates and termination dates. The Trustees reviewed Amundi Pioneer's investment approach for the Fund and its research process. The Trustees considered the resources of Amundi Pioneer and the personnel of Amundi Pioneer who provide investment management services to the Fund. They also reviewed the amount of non-investment resources and personnel of Amundi Pioneer that are involved in Amundi Pioneer's services to the Fund, including Amundi Pioneer's compliance and legal resources and personnel. The Trustees noted the substantial attention and high priority given by Amundi Pioneer's senior management to the Pioneer Fund complex. The Trustees considered that Amundi Pioneer supervises and monitors the performance of the Fund's service providers and provides the Fund with personnel (including Fund officers) and other resources that are necessary for the Fund's business management and operations and that Amundi Pioneer would continue to provide those investment management and research services and resources to the Fund following the consummation of the Pioneer High Income Municipal Fund | Annual Report | 8/31/17 51 Transaction. The Trustees also considered that, as administrator, Amundi Pioneer would continue to be responsible for the administration of the Fund's business and other affairs. The Trustees considered the fees to be paid to Amundi Pioneer for the provision of administration services. The Trustees considered that Deloitte & Touche LLP informed the Board that it would no longer be independent with respect to the Fund upon the completion of the Transaction and, accordingly, that it would be necessary for the Board to engage a new independent registered public accounting firm for the Fund. The Trustees considered that the Transaction was not expected to have a material adverse impact on the nature, scope and overall quality of services provided to the Fund and its shareholders, including investment management, risk management, administrative, compliance, legal and other services, as a result of the Transaction. In that regard, the Trustees considered that Amundi is one of the largest asset managers globally, and that Amundi Pioneer may have access to additional research and portfolio management capabilities as a result of the Transaction and that Amundi Pioneer, as part of Amundi, is expected to have an enhanced global presence that may contribute to an increase in the overall scale and resources of Amundi Pioneer. Furthermore, in considering whether the Transaction would be expected to have a material adverse impact on the nature, scope and overall quality of services provided to the Fund and its shareholders, the Trustees considered the statements by representatives of Amundi that they expect the Chief Executive Officer and Chief Investment Officer of Amundi Pioneer to remain in their current positions and that they do not currently foresee major changes in the day-to-day investment management operations of Amundi Pioneer as a direct result of the Transaction, or the risk management, legal or compliance services provided by Amundi Pioneer, with respect to the Fund. They further considered the current incentive arrangements for key personnel of Amundi Pioneer that would continue after the closing of the Transaction. They also noted Amundi's stated intention to establish a new long-term incentive plan following the closing. The Trustees also took into account their experience in evaluating the proposed combination of Pioneer Investments and Santander Asset Management, which was announced in September, 2014 and abandoned in July, 2016. In light of, among other things, this experience, the Trustees determined that they were not able to identify any realistic alternatives to approving the New Management Agreement that would provide the level of services to the Fund and its shareholders that are expected to be provided by Amundi Pioneer after the closing of the Transaction. 52 Pioneer High Income Municipal Fund | Annual Report | 8/31/17 Based on these considerations, the Trustees concluded that the nature, extent and quality of services that Amundi Pioneer would continue to provide to the Fund under the New Management Agreement would be satisfactory and consistent with the terms of the New Management Agreement. Performance of the Fund In considering the Fund's performance, the Trustees regularly reviewed and discussed throughout the year data prepared by Amundi Pioneer and information comparing the Fund's performance with the performance of its peer group of funds, as classified by each of Morningstar, Inc. (Morningstar) and Lipper, and the performance of the Fund's benchmark index. They also discussed the Fund's performance with Amundi Pioneer on a regular basis. The Trustees' regular reviews and discussions were factored into the Trustees' deliberations concerning the approval of the New Management Agreement. Management Fee and Expenses The Trustees noted that the stated management fees to be paid by the Fund are identical under the Current Management Agreement and the New Management Agreement. The Trustees considered information showing the fees and expenses of the Fund in comparison to the management fees and expense ratios of its peer group of funds as classified by Morningstar and also to the expense ratios of a peer group of funds selected on the basis of criteria determined by the Independent Trustees for this purpose using data provided by Strategic Insight Mutual Fund Research and Consulting, LLC (Strategic Insight), an independent third party. In all quintile rankings referred to below, first quintile is most favorable to the Fund's shareowners. To the extent applicable, the Trustees also considered the impact of transfer agency, sub-transfer agency, and other non-management fee expenses on the expense ratios of the Fund. The Trustees noted that they separately review the Fund's transfer agency, sub-transfer agency and intermediary arrangements and that the results of the most recent such review were considered in the consideration of the Fund's expense ratio. The Trustees considered that the Fund's management fee as of September 30, 2016 was in the third quintile relative to the management fees paid by other funds in its Morningstar category for the comparable period. The Trustees also considered the breakpoints in the management fee schedule and the reduced fee rates above certain asset levels. The Trustees considered that the expense ratio of the Fund's Class A shares as of September 30, 2016 was in the fourth quintile relative to its Morningstar category and in the third quintile relative to its Strategic Insight peer group, in each case for the comparable period. The Trustees considered that the Fund's expense ratio was less than one basis point Pioneer High Income Municipal Fund | Annual Report | 8/31/17 53 higher than the median expense ratio paid by other funds in its Morningstar category. The Trustees noted the impact of expenses relating to small accounts and omnibus accounts on transfer and sub-transfer agency expenses generally. The Trustees reviewed management fees charged by Amundi Pioneer and Amundi Pioneer Institutional to institutional and other clients, including publicly offered European funds sponsored by Amundi Pioneer's affiliates, unaffiliated U.S. registered investment companies (in a sub-advisory capacity), and unaffiliated foreign and domestic separate accounts. The Trustees also considered Amundi Pioneer's costs in providing services to the Fund and Amundi Pioneer's and Amundi Pioneer Institutional's costs in providing services to the other clients and considered the differences in management fees and profit margins for fund and non-fund services. In evaluating the fees associated with Amundi Pioneer's and Amundi Pioneer Institutional's client accounts, the Trustees took into account the respective demands, resources and complexity associated with the Fund and other client accounts. The Trustees noted that in some instances the fee rates for those clients were lower than the management fee for the Fund and considered that, under both the Current Management Agreement and the New Management Agreement, Amundi Pioneer would perform additional services for the Fund that it does not provide to those other clients or services that are broader in scope, including oversight of the Fund's other service providers and activities related to compliance and the extensive regulatory and tax regimes to which the Fund is subject. The Trustees also considered the different risks associated with Amundi Pioneer's management of the Fund and Amundi Pioneer's and Amundi Pioneer Institutional's management of the other client accounts. The Trustees concluded that the management fee payable by the Fund to Amundi Pioneer was reasonable in relation to the nature and quality of the services to be provided by Amundi Pioneer. Profitability The Trustees considered information provided by Amundi Pioneer regarding the profitability of Amundi Pioneer with respect to the advisory services provided by Amundi Pioneer to the Fund, including the methodology used by Amundi Pioneer in allocating certain of its costs to the management of the Fund. The Trustees also considered Amundi Pioneer's profit margin in connection with the overall operation of the Fund. They further reviewed the financial results, including the profit margins, realized by Amundi Pioneer and Amundi Pioneer Institutional from non-fund businesses. The Trustees considered Amundi Pioneer's profit margins with respect to the Fund in comparison to the limited industry data available and noted that the profitability of any adviser was affected by numerous factors, including its 54 Pioneer High Income Municipal Fund | Annual Report | 8/31/17 organizational structure and method for allocating expenses. The Trustees concluded that Amundi Pioneer's profitability with respect to the management of the Fund was not unreasonable. Economies of Scale The Trustees considered Amundi Pioneer's views relating to economies of scale in connection with the Pioneer Funds as fund assets grow and the extent to which any such economies of scale are shared with the Fund and Fund shareholders. The Trustees recognize that economies of scale are difficult to identify and quantify, and that, among other factors that may be relevant, are the following: fee levels, expense subsidization, investment by Amundi Pioneer in research and analytical capabilities and Amundi Pioneer's commitment and resource allocation to the Fund. The Trustees noted that profitability also may be an indicator of the availability of any economies of scale, although profitability may vary for other reasons including due to reductions in expenses. The Trustees concluded that economies of scale, if any, were being appropriately shared with the Fund. Other Benefits The Trustees considered the other benefits that Amundi Pioneer enjoys from its relationship with the Fund. The Trustees considered the character and amount of fees paid or to be paid by the Fund, other than under the Current Management Agreement or the New Management Agreement, for services provided by Amundi Pioneer and its affiliates. The Trustees further considered the revenues and profitability of Amundi Pioneer's businesses other than the Fund business. To the extent applicable, the Trustees also considered the benefits to the Fund and to Amundi Pioneer and its affiliates from the use of "soft" commission dollars generated by the Fund to pay for research and brokerage services. The Trustees considered that following the completion of the Transaction, Amundi Pioneer will be the principal U.S. asset management business of Amundi, and that Amundi's worldwide asset management business will manage over $1.38 trillion in assets (including the Pioneer Funds). This may create opportunities for Amundi Pioneer, Amundi Pioneer Institutional and Amundi that derive from Amundi Pioneer's relationships with the Fund, including Amundi's ability to market the services of Amundi Pioneer globally. The Trustees noted that Amundi Pioneer may have access to additional research capabilities as a result of the Transaction and Amundi's enhanced global presence that may contribute to an increase of the overall scale of Amundi Pioneer. The Trustees considered that Amundi Pioneer and the Fund are expected to receive reciprocal intangible benefits from the relationship, including mutual brand recognition and, for the Fund, direct and indirect access to the resources of a large global asset manager. The Trustees concluded Pioneer High Income Municipal Fund | Annual Report | 8/31/17 55 that any such benefits received by Amundi Pioneer as a result of its relationship with the Fund were reasonable. Conclusion After consideration of the factors described above as well as other factors, the Trustees, including the Independent Trustees, concluded that the New Management Agreement and the Interim Management Agreement for the Fund, including the fees payable thereunder, were fair and reasonable and voted to approve the New Management Agreement and the Interim Management Agreement, and to recommend that shareholders approve the New Management Agreement. 56 Pioneer High Income Municipal Fund | Annual Report | 8/31/17 Trustees, Officers and Service Providers Investment Adviser Amundi Pioneer Asset Management, Inc. Custodian and Sub-Administrator Brown Brothers Harriman & Co. Independent Registered Public Accounting Firm Ernst & Young LLP Principal Underwriter Amundi Pioneer Distributor, Inc. Legal Counsel Morgan, Lewis & Bockius LLP Shareowner Services and Transfer Agent Boston Financial Data Services, Inc. Proxy Voting Policies and Procedures of the Fund are available without charge, upon request, by calling our toll free number (1-800-225-6292). Information regarding how the Fund voted proxies relating to portfolio securities during the most recent 12-month period ended June 30 is publicly available to shareowners at www.amundipioneer.com. This information is also available on the Securities and Exchange Commission's web site at www.sec.gov. Trustees and Officers The Fund's Trustees and officers are listed below, together with their principal occupations and other directorships they have held during at least the past five years. Trustees who are interested persons of the Fund within the meaning of the 1940 Act are referred to as Interested Trustees. Trustees who are not interested persons of the Fund are referred to as Independent Trustees. Each of the Trustees serves as a Trustee of each of the 46 U.S. registered investment portfolios for which Amundi Pioneer serves as investment adviser (the "Pioneer Funds"). The address for all Trustees and all officers of the Fund is 60 State Street, Boston, Massachusetts 02109. The Statement of Additional Information of the Fund includes additional information about the Trustees and is available, without charge, upon request, by calling 1-800-225-6292. Pioneer High Income Municipal Fund | Annual Report | 8/31/17 57 Independent Trustees ------------------------------------------------------------------------------------------------------------------------------------ Name, Age and Position Term of Office and Other Directorships Held With the Fund Length of Service Principal Occupation Held by Trustee ------------------------------------------------------------------------------------------------------------------------------------ Thomas J. Perna (66) Trustee since 2006. Private investor (2004 - 2008 and 2013 - Director, Broadridge Financial Chairman of the Board Serves until a present); Chairman (2008 - 2013) and Chief Solutions, Inc. (investor and Trustee successor trustee is Executive Officer (2008 - 2012), Quadriserv, communications and securities elected or earlier Inc. (technology products for securities processing provider for financial retirement or removal. lending industry); and Senior Executive Vice services industry) (2009 - President, The Bank of New York (financial and present); Director, Quadriserv, securities services) (1986 - 2004) Inc. (2005 - 2013); and Commissioner, New Jersey State Civil Service Commission (2011 - 2015) ------------------------------------------------------------------------------------------------------------------------------------ David R. Bock (73) Trustee since 2006. Managing Partner, Federal City Capital Advisors Director of New York Mortgage Trustee Serves until a (corporate advisory services company) (1997 - Trust (publicly-traded mortgage successor trustee is 2004 and 2008 - present); Interim Chief REIT) (2004 - 2009, 2012 - elected or earlier Executive Officer, Oxford Analytica, Inc. present); Director of The Swiss retirement or removal. (privately held research and consulting Helvetia Fund, Inc. (closed-end company) (2010); Executive Vice President and fund) (2010 - present); Director Chief Financial Officer, I-trax, Inc. (publicly of Oxford Analytica, Inc. (2008 - traded health care services company) (2004 - present); and Director of 2007); and Executive Vice President and Chief Enterprise Community Investment, Financial Officer, Pedestal Inc. Inc. (privately-held affordable (internet-based mortgage trading company) (2000 housing finance company) (1985 - - 2002); Private Consultant (1995 - 1997); 2010) Managing Director, Lehman Brothers (1992 - 1995); Executive, The World Bank (1979 - 1992) ------------------------------------------------------------------------------------------------------------------------------------ Benjamin M. Friedman (73) Trustee since 2008. William Joseph Maier Professor of Political Trustee, Mellon Institutional Trustee Serves until a Economy, Harvard University (1972 - present) Funds Investment Trust and Mellon successor trustee is Institutional Funds Master elected or earlier Portfolio (oversaw 17 portfolios retirement or removal. in fund complex) (1989 - 2008) ------------------------------------------------------------------------------------------------------------------------------------ Margaret B.W. Graham (70) Trustee since 2006. Founding Director, Vice-President and Corporate None Trustee Serves until a Secretary, The Winthrop Group, Inc. (consulting successor trustee is firm) (1982 - present); Desautels Faculty of elected or earlier Management, McGill University (1999 - present); retirement or removal. and Manager of Research Operations and Organizational Learning, Xerox PARC, Xerox's advance research center (1990-1994) ------------------------------------------------------------------------------------------------------------------------------------ 58 Pioneer High Income Municipal Fund | Annual Report | 8/31/17 ------------------------------------------------------------------------------------------------------------------------------------ Name, Age and Position Term of Office and Other Directorships Held With the Fund Length of Service Principal Occupation Held by Trustee ------------------------------------------------------------------------------------------------------------------------------------ Lorraine H. Monchak (61) Trustee since 2017. Chief Investment Officer, 1199 SEIU Funds None Trustee (Advisory Trustee from (healthcare workers union pension funds) (2001 2014 - 2017). Serves - present); Vice President - International until a successor Investments Group, American International trustee is elected or Group, Inc. (insurance company) (1993 - 2001); earlier retirement or Vice President, Corporate Finance and Treasury removal. Group, Citibank, N.A. (1980 - 1986 and 1990 - 1993); Vice President - Asset/Liability Management Group, Federal Farm Funding Corporation (government-sponsored issuer of debt securities) (1988 - 1990); Mortgage Strategies Group, Shearson Lehman Hutton, Inc. (investment bank) (1987 - 1988); Mortgage Strategies Group, Drexel Burnham Lambert, Ltd. (investment bank) (1986 - 1987) ------------------------------------------------------------------------------------------------------------------------------------ Marguerite A. Piret (69) Trustee since 2006. President and Chief Executive Officer, Newbury Director of New America High Trustee Serves until a Piret Company (investment banking firm) (1981 - Income Fund, Inc. (closed-end successor trustee is present) investment company) (2004 - elected or earlier present); and Member, Board of retirement or removal. Governors, Investment Company Institute (2000 - 2006) ------------------------------------------------------------------------------------------------------------------------------------ Fred J. Ricciardi (70) Trustee since 2014. Consultant (investment company services) (2012 None Trustee Serves until a - present); Executive Vice President, BNY successor trustee is Mellon (financial and investment company elected or earlier services) (1969 - 2012); Director, BNY retirement or removal. International Financing Corp. (financial services) (2002 - 2012); Director, Mellon Overseas Investment Corp. (financial services) (2009 - 2012) ------------------------------------------------------------------------------------------------------------------------------------ Pioneer High Income Municipal Fund | Annual Report | 8/31/17 59 Interested Trustees ------------------------------------------------------------------------------------------------------------------------------------ Name, Age and Position Term of Office and Other Directorships Held With the Fund Length of Service Principal Occupation Held by Trustee ------------------------------------------------------------------------------------------------------------------------------------ Lisa M. Jones (55)* Trustee since 2017. Chair, Director, CEO and President of Amundi None Trustee, President and Serves until a Pioneer Asset Management USA, Inc. (since Chief Executive Officer successor trustee is September 2014); Chair, Director and CEO of elected or earlier Amundi Pioneer Asset Management, Inc. (since retirement or removal September 2014); Chair, Director and CEO of Amundi Pioneer Distributor, Inc. (since September 2014); Chair, Director, CEO and President of Amundi Pioneer Institutional Asset Management, Inc. (since September 2014); Managing Director, Morgan Stanley Investment Management (2010 - 2013); Director of Institutional Business, CEO of International, Eaton Vance Management (2005 - 2010) ------------------------------------------------------------------------------------------------------------------------------------ Kenneth J. Taubes (59)* Trustee since 2014. Director and Executive Vice President (since None Trustee Serves until a 2008) and Chief Investment Officer, U.S. (since successor trustee is 2010) of Amundi Pioneer Asset Management USA, elected or earlier Inc.; Executive Vice President and Chief retirement or removal Investment Officer, U.S. of Amundi Pioneer (since 2008); Executive Vice President of Amundi Pioneer Institutional Asset Management, Inc. (since 2009); Portfolio Manager of Amundi Pioneer (since 1999) ------------------------------------------------------------------------------------------------------------------------------------ 60 Pioneer High Income Municipal Fund | Annual Report | 8/31/17 Fund Officers ------------------------------------------------------------------------------------------------------------------------------------ Name, Age and Position Term of Office and Other Directorships Held With the Fund Length of Service Principal Occupation Held by Trustee ------------------------------------------------------------------------------------------------------------------------------------ Christopher J. Kelley Since 2006. Serves at Vice President and Associate General Counsel of None (52) the discretion of the Amundi Pioneer since January 2008; Secretary Secretary and Board and Chief Legal Officer of all of the Pioneer Chief Legal Officer Funds since June 2010; Assistant Secretary of all of the Pioneer Funds from September 2003 to May 2010; Vice President and Senior Counsel of Amundi Pioneer from July 2002 to December 2007 ------------------------------------------------------------------------------------------------------------------------------------ Carol B. Hannigan (56) Since 2010. Serves at Fund Governance Director of Amundi Pioneer None Assistant Secretary the discretion of the since December 2006 and Assistant Secretary of Board all the Pioneer Funds since June 2010; Manager - Fund Governance of Amundi Pioneer from December 2003 to November 2006; and Senior Paralegal of Amundi Pioneer from January 2000 to November 2003 ------------------------------------------------------------------------------------------------------------------------------------ Thomas Reyes (54) Since 2010. Serves at Senior Counsel of Amundi Pioneer since May 2013 None Assistant Secretary the discretion of the and Assistant Secretary of all the Pioneer Board Funds since June 2010; Counsel of Amundi Pioneer from June 2007 to May 2013 ------------------------------------------------------------------------------------------------------------------------------------ Mark E. Bradley (57) Since 2008. Serves at Vice President - Fund Treasury of Amundi None Treasurer and the discretion of the Pioneer; Treasurer of all of the Pioneer Funds Chief Financial and Board since March 2008; Deputy Treasurer of Amundi Accounting Officer Pioneer from March 2004 to February 2008; and Assistant Treasurer of all of the Pioneer Funds from March 2004 to February 2008 ------------------------------------------------------------------------------------------------------------------------------------ Luis I. Presutti (52) Since 2006. Serves at Director - Fund Treasury of Amundi Pioneer; and None Assistant Treasurer the discretion of the Assistant Treasurer of all of the Pioneer Funds Board ------------------------------------------------------------------------------------------------------------------------------------ Gary Sullivan (59) Since 2006. Serves at Fund Accounting Manager - Fund Treasury of None Assistant Treasurer the discretion of the Amundi Pioneer; and Assistant Treasurer of all Board of the Pioneer Funds ------------------------------------------------------------------------------------------------------------------------------------ David F. Johnson (37) Since 2009. Serves at Fund Administration Manager - Fund Treasury of None Assistant Treasurer the discretion of the Amundi Pioneer since November 2008; Assistant Board Treasurer of all of the Pioneer Funds since January 2009; Client Service Manager - Institutional Investor Services at State Street Bank from March 2003 to March 2007 ------------------------------------------------------------------------------------------------------------------------------------ Pioneer High Income Municipal Fund | Annual Report | 8/31/17 61 Fund Officers (continued) ------------------------------------------------------------------------------------------------------------------------------------ Name, Age and Position Term of Office and Other Directorships Held With the Fund Length of Service Principal Occupation Held by Trustee ------------------------------------------------------------------------------------------------------------------------------------ Jean M. Bradley (64) Since 2010. Serves at Chief Compliance Officer of Amundi Pioneer and None Chief Compliance Officer the discretion of the of all the Pioneer Funds since March 2010; Board Chief Compliance Officer of Amundi Pioneer Institutional Asset Management, Inc. since January 2012; Chief Compliance Officer of Vanderbilt Capital Advisors, LLC since July 2012: Director of Adviser and Portfolio Compliance at Amundi Pioneer since October 2005; Senior Compliance Officer for Columbia Management Advisers, Inc. from October 2003 to October 2005 ------------------------------------------------------------------------------------------------------------------------------------ Kelly O'Donnell (46) Since 2006. Serves at Director - Transfer Agency Compliance of Amundi None Anti-Money the discretion of the Pioneer and Anti-Money Laundering Officer of Laundering Officer Board all the Pioneer Funds since 2006 ------------------------------------------------------------------------------------------------------------------------------------ * Ms. Jones and Mr. Taubes are Interested Trustees because they are officers or directors of the fund's investment adviser and certain of its affiliates. 62 Pioneer High Income Municipal Fund | Annual Report | 8/31/17 This page is for your notes. Pioneer High Income Municipal Fund | Annual Report | 8/31/17 63 This page is for your notes. 64 Pioneer High Income Municipal Fund | Annual Report | 8/31/17 This page is for your notes. Pioneer High Income Municipal Fund | Annual Report | 8/31/17 65 This page is for your notes. 66 Pioneer High Income Municipal Fund | Annual Report | 8/31/17 This page is for your notes. Pioneer High Income Municipal Fund | Annual Report | 8/31/17 67 This page is for your notes. 68 Pioneer High Income Municipal Fund | Annual Report | 8/31/17 How to Contact Amundi Pioneer We are pleased to offer a variety of convenient ways for you to contact us for assistance or information. Call us for: -------------------------------------------------------------------------------- Account Information, including existing accounts, new accounts, prospectuses, applications and service forms 1-800-225-6292 FactFone(SM) for automated fund yields, prices, account information and transactions 1-800-225-4321 Retirement plans information 1-800-622-0176 Write to us: -------------------------------------------------------------------------------- Amundi Pioneer P.O. Box 55014 Boston, Massachusetts 02205-5014 Our toll-free fax 1-800-225-4240 Our internet e-mail address ask.amundipioneer@amundipioneer.com (for general questions about Amundi Pioneer only) Visit our web site: www.amundipioneer.com This report must be preceded or accompanied by a prospectus. The Fund files a complete schedule of investments with the Securities and Exchange Commission for the first and third quarters for each fiscal year on Form N-Q. Shareholders may view the filed Form N-Q by visiting the Commission's web site at http://www.sec.gov. The filed form may also be viewed and copied at the Commission's Public Reference Room in Washington, DC. Information regarding the operations of the Public Reference Room may be obtained by calling 1-800-SEC-0330. [LOGO] Amundi Pioneer ============== ASSET MANAGEMENT Amundi Pioneer Asset Management, Inc. 60 State Street Boston, MA 02109 www.amundipioneer.com Securities offered through Amundi Pioneer Distributor, Inc. 60 State Street, Boston, MA 02109 Underwriter of Pioneer Mutual Funds, Member SIPC (C) 2017 Amundi Pioneer Asset Management 21203-10-1017 Pioneer U.S. Corporate High Yield Fund -------------------------------------------------------------------------------- Annual Report | August 31, 2017 -------------------------------------------------------------------------------- Ticker Symbols: Class A HYCAX Class C HYCCX Class Y HYCYX [LOGO] Amundi Pioneer ============== ASSET MANAGEMENT visit us: www.amundipioneer.com Table of Contents President's Letter 2 Portfolio Management Discussion 4 Portfolio Summary 9 Prices and Distributions 10 Performance Update 11 Comparing Ongoing Fund Expenses 14 Schedule of Investments 16 Financial Statements 27 Notes to Financial Statements 34 Report of Independent Registered Public Accounting Firm 43 Additional Information 44 Approval of New and Interim Management Agreements 45 Trustees, Officers and Service Providers 54 Pioneer U.S. Corporate High Yield Fund | Annual Report | 8/31/17 1 President's Letter We are very pleased to announce that on July 3, 2017, Amundi Asset Management, a large European asset manager, officially acquired Pioneer Investments and announced the completion of a merger which combined Pioneer Investment Management USA, Inc., in Boston and Amundi Smith Breeden in Durham, N.C., to form Amundi Pioneer Asset Management, Inc. ("Amundi Pioneer"). Amundi Smith Breeden, founded as Smith Breeden Associates in 1982, is a highly regarded relative-value credit investor managing an extensive range of fixed-income strategies tailored to the needs of institutional investors. Our new brand, Amundi Pioneer, now signifies: o Ownership by Amundi Asset Management ("Amundi"). Amundi is Europe's largest asset manager and among the world's top 10 asset managers, as measured by assets under management (AUM), with approximately $1.3 trillion AUM(1). o The significantly larger scale and resources of the combined firms. o Amundi's desire to maintain the strong brand recognition of Pioneer in the U.S., which dates back to 1928. We would like to stress to shareowners that all of the Pioneer mutual funds have retained their previous names. In addition, there have been no changes to the portfolio managers or the funds' investment strategies as a result of the merger. Amundi Pioneer's newly combined investment team works together as one unit, discussing investment ideas, participating in research meetings, and collaborating across the expanded organization. We are looking forward to the opportunity to leverage the broad global resources of Amundi. In bringing together Pioneer and Amundi Smith Breeden, we have combined organizations that share similar investment philosophies and corporate cultures, and that value teamwork across a collegial, collaborative environment. We are very excited about our future, as we believe the greater scale and expanded global reach of the combined firm, with some 5,000 employees worldwide, provides several opportunities to better meet the needs of today's investors by exploring new, innovative investment solutions and integrating the abundance of thought leadership resources at Amundi, while also maintaining our commitment to providing existing shareowners with outstanding service locally. (1) Source: IPE "Top 400 asset managers" published in June 2017 and based on AUM as of end December 2016. 2 Pioneer U.S. Corporate High Yield Fund | Annual Report | 8/31/17 As always, and particularly during times of market uncertainty, we encourage you to work with your financial advisor to develop an overall investment plan that addresses both your short- and long-term goals, and to implement such a plan in a disciplined manner. We greatly appreciate the trust you have placed in us and look forward to continuing to serve you in the future as we move into a new and exciting era. Sincerely, /s/ Lisa M. Jones Lisa M. Jones Head of the Americas, President and CEO of U.S. Amundi Pioneer Asset Management USA, Inc. August 31, 2017 Any information in this shareowner report regarding market or economic trends or the factors influencing the Fund's historical or future performance are statements of opinion as of the date of this report. Past performance is no guarantee of future results. Pioneer U.S. Corporate High Yield Fund | Annual Report | 8/31/17 3 Portfolio Management Discussion | 8/31/17 Important Note: On July 3, 2017, Amundi acquired Pioneer Investments, a group of asset management companies located throughout the world. Amundi, one of the world's largest asset managers, is headquartered in Paris, France. As a result of the transaction, Pioneer Investment Management, Inc., the Fund's investment adviser, became an indirect wholly owned subsidiary of Amundi and Amundi's wholly owned subsidiary, Amundi USA, Inc. Prior to July 3, 2017, Pioneer Investments was owned by Pioneer Global Asset Management S.p.A., a wholly owned subsidiary of UniCredit S.p.A. In connection with the transaction, the names of the Fund's investment adviser and principal underwriter changed. Effective July 3, 2017, the name of Pioneer Investment Management, Inc. changed to Amundi Pioneer Asset Management, Inc. and the name of Pioneer Funds Distributor, Inc. changed to Amundi Pioneer Distributor, Inc. This transaction does not impact your existing relationship with Pioneer Investments, your advisor, or the methods you use to communicate with us, as the investor contact telephone numbers and services you expect will remain the same. We are excited, however, to be launching a new website representing the combined company. Come visit us at: www.amundipioneer.com. In the following interview, portfolio manager Matthew Shulkin discusses the factors that influenced the performance of Pioneer U.S. Corporate High Yield Fund between the Fund's inception on January 3, 2017, and the end of the Fund's fiscal year on August 31, 2017. Mr. Shulkin, C.F.A., is a vice president and a portfolio manager at Amundi Pioneer Asset Management, Inc., and is responsible for the day-to-day management of the Fund*. Q How did the Fund perform during the abbreviated fiscal year ended August 31, 2017? A From its inception on January 3, 2017, through August 31, 2017, Pioneer U.S. Corporate High Yield Fund's Class A shares returned 5.00% at net asset value, while the Fund's benchmark, the Bank of America Merrill Lynch (BofA ML) U.S. High Yield Index, returned 5.81%. For further comparison, year-to-date through August 31, 2017, the average return of the 684 mutual funds in Lipper's High Yield Funds category was 5.21%, and the average return of the 723 mutual funds in Morningstar's High Yield Bond Funds category was 5.18%. * Note to Shareholders: Effective October 1, 2017, after the end of the annual reporting period, Andrew Feltus, Co-Director of High Yield, a senior vice president, and a portfolio manager at Amundi Pioneer, joined Mr. Shulkin as a portfolio manager on Pioneer U.S. Corporate High Yield Fund. 4 Pioneer U.S. Corporate High Yield Fund | Annual Report | 8/31/17 Q Could you please describe the market environment for high-yield bonds during the Fund's abbreviated fiscal year ended August 31, 2017? A High-yield bonds in aggregate experienced solid, positive returns for the period. From a fundamental perspective, credit-based assets continued to benefit from the support of strong corporate earnings and low default rates. Early in the period, risk sentiment in the market was further bolstered by anticipation of the adoption of business-friendly policies in Washington in the wake of the November 2016 U.S. elections, which left the Republicans in control of the White House and both houses of Congress. Lowering corporate tax rates, trimming regulations, and increasing infrastructure spending, all of which were proposed by the Trump campaign, were seen as governmental actions that had the potential to support corporate profitability going forward. As the period progressed, however, the Republicans failed to agree on a plan to repeal/replace the Affordable Care Act, thus clouding the outlook for the passage of tax reform and other pro-growth measures. Despite political difficulties in Washington, however, credit sentiment continued to be supported by strong corporate and consumer fundamentals. With that said, the positive performance of high-yield securities over the final six months of the period was driven mainly by the coupon, or yield portion of total return, as spread tightening became more incremental. (Credit spreads are commonly defined as the differences in yield between Treasuries and other types of fixed-income securities with similar maturities.) Q Can you review the Fund's principal investment strategies during the abbreviated fiscal year ended August 31, 2017, and explain the degree to which the strategies added to or detracted from performance versus the benchmark BofA ML Index? A The Fund's performance over the brief period since its inception modestly lagged the return of its benchmark. The benchmark-relative underperformance was mainly the result of the Fund's operations commencing just as credit-sensitive assets were in the midst of a rally at the outset of 2017, as it took a few days for us to fully invest the portfolio's assets. In addition, with credit spreads at or near historical lows in the wake of post-election exuberance, we opted to take a somewhat cautious stance with respect to the portfolio's quality profile. In that vein, the Fund's benchmark-relative performance was constrained to a degree by the portfolio's below-index exposure to lower-quality, CCC-rated and distressed issues, which outperformed over the full period ended August 31, 2017. Pioneer U.S. Corporate High Yield Fund | Annual Report | 8/31/17 5 In terms of individual sectors, security selection within basic materials added to the Fund's performance relative to the benchmark during the period, as the portfolio's holdings of metals & mining and building materials issues outperformed the broader sector. An underweight allocation to retailers also helped the Fund's benchmark-relative performance, as that segment of the market has suffered due to concerns over a secular shift on the part of consumers toward making purchases online. Conversely, the portfolio's underweight exposure to health care detracted from the Fund's benchmark-relative results, as the sector benefited from reduced fears that Washington's efforts to repeal or replace the Affordable Care Act would result in destabilizing changes to insurance coverage and reimbursement levels. In addition, the Fund's positioning within health care constrained relative returns, as some of the portfolio's pharmaceutical-related holdings experienced volatility because of speculation about future drug-pricing policy. Security selection within telecommunication services also detracted from the Fund's benchmark-relative results, as performance of the portfolio's wireline company holdings lagged that of the overall sector. Finally, the Fund's modest exposure to bank loans acted as a slight drag on relative performance, as loans underperformed high-yield bonds for the period. Q Can you discuss the factors that affected the Fund's income-generation (or yield), either positively or negatively, during the abbreviated fiscal year ended August 31, 2017? A The Fund's income-generation and yield provided to shareholders was relatively stable over the period. Our more "up-in-quality" and higher-rated bias in the portfolio resulted in a marginally lower yield for the Fund versus the benchmark BofA ML Index, but we view that positioning as appropriate given where we are in the current credit cycle. Q What role did derivatives play in the Fund's investment process and results during the abbreviated fiscal year ended August 31, 2017? A We did not use derivatives during the Fund's fiscal year ended August 31, 2017. The Fund does, however, have the ability to utilize derivatives from time to time in order to maintain both the desired level of portfolio exposure to the high-yield market, and sufficient liquidity, with the latter earmarked for making opportunistic purchases as well as for helping to meet any unanticipated shareholder redemption requests. Q What is your assessment of the current climate for fixed-income investing? A We continue to have a constructive outlook with respect to the U.S. economy and overall corporate credit fundamentals. Credit data remains strong and balance sheets do not appear overly stretched. The default rate 6 Pioneer U.S. Corporate High Yield Fund | Annual Report | 8/31/17 for high-yield bonds has continued to decline in 2017 versus the prior year. In addition, there is very little to suggest that a pick-up in inflation is imminent, thus increasing the likelihood that spread-based assets will continue to benefit from the maintenance of very low risk-free interest rates on the part of major central banks. That said, high-yield valuations are stretched by historical norms, which, in our view, argues for a measured stance when it comes to assuming credit risk. Even in the event that the White House and Congress are able to move forward on tax reform and/or other growth-oriented legislation, we believe the potential upside for the high-yield market from any such development is currently limited, given tight spreads for the overall asset class. As a result, we are comfortable with maintaining the Fund's underweight exposure to the lower-rated segments of the market. With respect to the Fund's stance on interest rates, against a backdrop of muted inflation, we do not anticipate any abrupt rise in rates over the near term. However, while the timing of any upward move is inherently unpredictable, we believe the risk is clearly weighted toward the upside for interest rates given their current, historically low levels. In keeping with this view, the Fund remains modestly underweight to the longer-duration, BB-rated segment of the high-yield market relative to B-rated issues. (Duration is a measure of the sensitivity of the price, or the value of principal, of a fixed-income investment to a change in interest rates, expressed as a number of years.) Please refer to the Schedule of Investments on pages 16-26 for a full listing of Fund securities. All investments are subject to risk, including the possible loss of principal. In the past several years, financial markets have experienced increased volatility, depressed valuations, decreased liquidity and heightened uncertainty. These conditions may continue, recur, worsen or spread. Investments in high-yield or lower rated securities are subject to greater-than-average price volatility, illiquidity and possibility of default. When interest rates rise, the prices of fixed income securities in the fund will generally fall. Conversely, when interest rates fall, the prices of fixed income securities in the fund will generally rise. Investments in the Fund are subject to possible loss due to the financial failure of issuers of underlying securities and their inability to meet their debt obligations. Pioneer U.S. Corporate High Yield Fund | Annual Report | 8/31/17 7 Prepayment risk is the chance that an issuer may exercise its right to prepay its security, if falling interest rates prompt the issuer to do so. Forced to reinvest the unanticipated proceeds at lower interest rates, the fund would experience a decline in income and lose the opportunity for additional price appreciation. The portfolio may invest in mortgage-backed securities, which during times of fluctuating interest rates may increase or decrease more than other fixed-income securities. Mortgage-backed securities are also subject to prepayments. The Fund may use derivatives, such as options, futures, inverse floating rate obligations, swaps, and others, which can be illiquid, may disproportionately increase losses, and have a potentially large impact on Fund performance. Derivatives may have a leveraging effect on the Fund. At times, the Fund's investments may represent industries or sectors that are interrelated or have common risks, making them more susceptible to any economic, political, or regulatory developments or other risks affecting those industries and sectors. These risks may increase share price volatility. Before investing, consider the product's investment objectives, risks, charges and expenses. Contact your advisor or Amundi Pioneer Asset Management, Inc., for a prospectus or summary prospectus containing this information. Read it carefully. Any information in this shareholder report regarding market or economic trends or the factors influencing the Fund's historical or future performance are statements of opinion as of the date of this report. Past performance is no guarantee of future results. 8 Pioneer U.S. Corporate High Yield Fund | Annual Report | 8/31/17 Portfolio Summary | 8/31/17 Sector Distribution -------------------------------------------------------------------------------- (As a percentage of total investment portfolio) [THE FOLLOWING DATA WAS REPRESENTED AS A PIE CHART IN THE PRINTED MATERIAL] U.S. Corporate Bonds 78.1% International Corporate Bonds 15.2% Senior Secured Loans 3.7% Convertible Preferred Stocks 1.7% Convertible Corporate Bonds 1.3% 10 Largest Holdings* -------------------------------------------------------------------------------- (As a percentage of total long-term holdings) 1. Constellium NV, 6.625%, 3/1/25 (144A) 1.30% -------------------------------------------------------------------------------- 2. Royal Bank of Scotland Group Plc, Floating Rate Note (Perpetual) 1.24 -------------------------------------------------------------------------------- 3. International Game Technology Plc, 6.5%, 2/15/25 (144A) 1.11 -------------------------------------------------------------------------------- 4. Altice Financing SA, 7.5%, 5/15/26 (144A) 1.08 -------------------------------------------------------------------------------- 5. SFR Group SA, 7.375%, 5/1/26 (144A) 1.07 -------------------------------------------------------------------------------- 6. ING Groep NV, Floating Rate Note, 12/29/49 1.06 -------------------------------------------------------------------------------- 7. Big River Steel LLC, 7.25%, 9/1/25 (144A) 1.03 -------------------------------------------------------------------------------- 8. CSC Holdings LLC, 5.5%, 4/15/27 (144A) 1.03 -------------------------------------------------------------------------------- 9. Cimpress NV, 7.0%, 4/1/22 (144A) 1.02 -------------------------------------------------------------------------------- 10. Ardagh Packaging Finance Plc, 4.625%, 5/15/23 (144A) 1.01 -------------------------------------------------------------------------------- * This list excludes temporary cash investments. The portfolio is actively managed, and current holdings may be different. The holdings listed should not be considered recommendations to buy or sell any securities listed. Pioneer U.S. Corporate High Yield Fund | Annual Report | 8/31/17 9 Prices and Distributions | 8/31/17 Net Asset Value per Share -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- Class 8/31/17 1/3/17* -------------------------------------------------------------------------------- A $10.22 $10.00 -------------------------------------------------------------------------------- C $10.21 $10.00 -------------------------------------------------------------------------------- Y $10.22 $10.00 -------------------------------------------------------------------------------- Distributions per Share: 1/3/17-8/31/17 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- Short-Term Long-Term Class Dividends Capital Gains Capital Gains -------------------------------------------------------------------------------- A $0.2760 $ -- $ -- -------------------------------------------------------------------------------- C $0.2310 $ -- $ -- -------------------------------------------------------------------------------- Y $0.2907 $ -- $ -- -------------------------------------------------------------------------------- Index Definition -------------------------------------------------------------------------------- The BofA ML U.S. High Yield Index is an unmanaged, commonly accepted measure of the performance of high-yield securities. Index returns are calculated monthly, assume reinvestment of dividends and, unlike Fund returns, do not reflect any fees, expenses or sales charges. It is not possible to invest directly in an index. The index defined here pertains to the "Value of $10,000 Investment" and "Value of $5 Million Investment" charts on pages 11-13. * The Fund commenced operations on January 3, 2017. 10 Pioneer U.S. Corporate High Yield Fund | Annual Report | 8/31/17 Performance Update | 8/31/17 Class A Shares Investment Returns -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $10,000 investment made in Class A shares of Pioneer U.S. Corporate High Yield Fund at public offering price during the periods shown, compared to that of the BofA ML U.S. High Yield Index. Average Annual Total Returns (As of August 31, 2017) -------------------------------------------------------------------------------- Net Public BofA Asset Offering ML U.S. Value Price High Yield Period (NAV) (POP) Index -------------------------------------------------------------------------------- Life of Class (1/3/17) 5.00% 0.28% 5.81% -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated January 1, 2017) -------------------------------------------------------------------------------- Gross Net -------------------------------------------------------------------------------- 1.99% 1.05% -------------------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $10,000 Investment Pioneer U.S. Corporate BofA ML U.S. High High Yield Fund Yield Index 1/17 $ 9,550 $ 10,000 8/17 $ 9,990 $ 10,469 Call 1-800-225-6292 or visit www.amundipioneer.com for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. NAV results represent the percent change in net asset value per share. Returns would have been lower had sales charges been reflected. POP returns reflect deduction of maximum 4.50% sales charge. All results are historical and assume the reinvestment of dividends and capital gains. Other share classes are available for which performance and expenses will differ. Performance results reflect any applicable expense waivers in effect during the periods shown. Without such waivers Fund performance would be lower. Waivers may not be in effect for all funds. Certain fee waivers are contractual through a specified period. Otherwise, fee waivers can be rescinded at any time. See the prospectus and financial statements for more information. The net expense ratio reflects the contractual expense limitation currently in effect through January 1, 2018, for Class A shares. There can be no assurance that Amundi Pioneer will extend the expense limitation beyond such time. Please see the prospectus and financial statements for more information. The performance table and graph do not reflect the deduction of fees and taxes that a shareowner would pay on Fund distributions or the redemption of Fund shares. Please refer to the financial highlights for a more current expense ratio. Pioneer U.S. Corporate High Yield Fund | Annual Report | 8/31/17 11 Performance Update | 8/31/17 Class C Shares Investment Returns -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $10,000 investment made in Class C shares of Pioneer U.S. Corporate High Yield Fund during the periods shown, compared to that of the BofA ML U.S. High Yield Index. Average Annual Total Returns (As of August 31, 2017) -------------------------------------------------------------------------------- BofA ML U.S. If If High Yield Period Held Redeemed Index -------------------------------------------------------------------------------- Life of Class (1/3/17) 4.44% 4.44% 5.81% -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated January 1, 2017) -------------------------------------------------------------------------------- Gross Net -------------------------------------------------------------------------------- 2.74% 1.80% -------------------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $10,000 Investment Pioneer U.S. Corporate BofA ML U.S. High High Yield Fund Yield Index 1/17 $ 10,000 $ 10,000 8/17 $ 10,412 $ 10,469 Call 1-800-225-6292 or visit www.amundipioneer.com for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. Class C shares held for less than one year are also subject to a 1% contingent deferred sales charge (CDSC). If you paid a 1% sales charge, your returns would be lower than those shown above. "If Held" results represent the percent change in net asset value per share. Returns would have been lower had sales charges been reflected. All results are historical and assume the reinvestment of dividends and capital gains. Other share classes are available for which performance and expenses will differ. Performance results reflect any applicable expense waivers in effect during the periods shown. Without such waivers Fund performance would be lower. Waivers may not be in effect for all funds. Certain fee waivers are contractual through a specified period. Otherwise, fee waivers can be rescinded at any time. See the prospectus and financial statements for more information. The net expense ratio reflects the contractual expense limitation currently in effect through January 1, 2018, for Class C shares. There can be no assurance that Amundi Pioneer will extend the expense limitation beyond such time. Please see the prospectus and financial statements for more information. The performance table and graph do not reflect the deduction of fees and taxes that a shareowner would pay on Fund distributions or the redemption of Fund shares. Please refer to the financial highlights for a more current expense ratio. 12 Pioneer U.S. Corporate High Yield Fund | Annual Report | 8/31/17 Performance Update | 8/31/17 Class Y Shares Investment Returns -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $5 million investment made in Class Y shares of Pioneer U.S. Corporate High Yield Fund during the periods shown, compared to that of the BofA ML U.S. High Yield Index. Average Annual Total Returns (As of August 31, 2017) -------------------------------------------------------------------------------- Net BofA Asset ML U.S. Value High Yield Period (NAV) Index -------------------------------------------------------------------------------- Life of Class (1/3/17) 5.14% 5.81% -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated January 1, 2017) -------------------------------------------------------------------------------- Gross Net -------------------------------------------------------------------------------- 1.72% 0.75% -------------------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $5 Million Investment Pioneer U.S. Corporate BofA ML U.S. High High Yield Fund Yield Index 1/17 $ 5,000,000 $ 5,000,000 8/17 $ 5,236,337 $ 5,234,361 Call 1-800-225-6292 or visit www.amundipioneer.com for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. Class Y shares are not subject to sales charges and are available for limited groups of eligible investors, including institutional investors. All results are historical and assume the reinvestment of dividends and capital gains. Other share classes are available for which performance and expenses will differ. Performance results reflect any applicable expense waivers in effect during the periods shown. Without such waivers Fund performance would be lower. Waivers may not be in effect for all funds. Certain fee waivers are contractual through a specified period. Otherwise, fee waivers can be rescinded at any time. See the prospectus and financial statements for more information. The net expense ratio reflects the contractual expense limitation currently in effect through January 1, 2018, for Class Y shares. There can be no assurance that Amundi Pioneer will extend the expense limitation beyond such time. Please see the prospectus and financial statements for more information. The performance table and graph do not reflect the deduction of fees and taxes that a shareowner would pay on Fund distributions or the redemption of Fund shares. Please refer to the financial highlights for a more current expense ratio. Pioneer U.S. Corporate High Yield Fund | Annual Report | 8/31/17 13 Comparing Ongoing Fund Expenses As a shareowner in the Fund, you incur two types of costs: (1) ongoing costs, including management fees, distribution and/or service (12b-1) fees, and other Fund expenses; and (2) transaction costs, including sales charges (loads) on purchase payments. This example is intended to help you understand your ongoing expenses (in dollars) of investing in the Fund and to compare these costs with the ongoing costs of investing in other mutual funds. The example is based on an investment of $1,000 at the beginning of the Fund's latest six-month period and held throughout the six months. Using the Tables -------------------------------------------------------------------------------- Actual Expenses The first table below provides information about actual account values and actual expenses. You may use the information in this table, together with the amount you invested, to estimate the expenses that you paid over the period as follows: (1) Divide your account value by $1,000 Example: an $8,600 account value (divided by) $1,000 = 8.6 (2) Multiply the result in (1) above by the corresponding share class's number in the third row under the heading entitled "Expenses Paid During Period" to estimate the expenses you paid on your account during this period. Expenses Paid on a $1,000 Investment in Pioneer U.S. Corporate High Yield Fund Based on actual returns from March 1, 2017, through August 31, 2017. -------------------------------------------------------------------------------- Share Class A C Y -------------------------------------------------------------------------------- Beginning Account $1,000.00 $1,000.00 $1,000.00 Value on 3/1/17 -------------------------------------------------------------------------------- Ending Account $1,032.55 $1,027.65 $1,032.71 Value on 8/31/17 -------------------------------------------------------------------------------- Expenses Paid $ 5.23 $ 8.94 $ 3.84 During Period* -------------------------------------------------------------------------------- * Expenses are equal to the Fund's annualized net expense ratio of 1.02%, 1.75%, and 0.75% for Class A, Class C, and Class Y shares, respectively, multiplied by the average account value over the period, multiplied by 184/365 (to reflect the partial year period). 14 Pioneer U.S. Corporate High Yield Fund | Annual Report | 8/31/17 Hypothetical Example for Comparison Purposes The table below provides information about hypothetical account values and hypothetical expenses based on the Fund's actual expense ratio and an assumed rate of return of 5% per year before expenses, which is not the Fund's actual return. The hypothetical account values and expenses may not be used to estimate the actual ending account balance or expenses you paid for the period. You may use this information to compare the ongoing costs of investing in the Fund and other funds. To do so, compare this 5% hypothetical example with the 5% hypothetical examples that appear in the shareholder reports of the other funds. Please note that the expenses shown in the tables are meant to highlight your ongoing costs only and do not reflect any transaction costs, such as sales charges (loads) that are charged at the time of the transaction. Therefore, the table below is useful in comparing ongoing costs only and will not help you determine the relative total costs of owning different funds. In addition, if these transaction costs were included, your costs would have been higher. Expenses Paid on a $1,000 Investment in Pioneer U.S. Corporate High Yield Fund Based on a hypothetical 5% per year return before expenses, reflecting the period from March 1, 2017, through August 31, 2017. -------------------------------------------------------------------------------- Share Class A C Y -------------------------------------------------------------------------------- Beginning Account $1,000.00 $1,000.00 $1,000.00 Value on 3/1/17 -------------------------------------------------------------------------------- Ending Account $1,020.06 $1,016.38 $ 1021.42 Value on 8/31/17 -------------------------------------------------------------------------------- Expenses Paid $ 5.19 $ 8.89 $ 3.82 During Period* -------------------------------------------------------------------------------- * Expenses are equal to the Fund's annualized net expense ratio of 1.02%, 1.75%, and 0.75% for Class A, Class C, and Class Y shares, respectively, multiplied by the average account value over the period, multiplied by 184/365 (to reflect the partial year period). Pioneer U.S. Corporate High Yield Fund | Annual Report | 8/31/17 15 Schedule of Investments | 8/31/17 ------------------------------------------------------------------------------------------------------- Effective Reference Principal Interest Index + Amount ($) Rate (a) Spread (b) Value ------------------------------------------------------------------------------------------------------- UNAFFILIATED ISSUERS -- 100.4% CONVERTIBLE CORPORATE BONDS -- 1.2% MEDIA -- 0.7% Cable & Satellite -- 0.7% 146,000 DISH Network Corp., 2.375%, 3/15/24 (144A) $ 147,734 ------------ Total Media $ 147,734 ------------------------------------------------------------------------------------------------------- HEALTH CARE EQUIPMENT & SERVICES -- 0.5% Health Care Equipment -- 0.5% 85,000 Wright Medical Group, Inc., 2.0%, 2/15/20 $ 98,228 ------------ Total Health Care Equipment & Services $ 98,228 ------------------------------------------------------------------------------------------------------- TOTAL CONVERTIBLE CORPORATE BONDS (Cost $244,998) $ 245,962 ------------------------------------------------------------------------------------------------------- CONVERTIBLE PREFERRED STOCKS -- 1.8% BANKS -- 1.8% Diversified Banks -- 1.8% 116 Bank of America Corp., 7.25% (Perpetual) $ 152,888 150 Wells Fargo & Co., 7.5% (Perpetual) 199,650 ------------ $ 352,538 ------------ Total Banks $ 352,538 ------------------------------------------------------------------------------------------------------- TOTAL CONVERTIBLE PREFERRED STOCKS (Cost $345,611) $ 352,538 ------------------------------------------------------------------------------------------------------- CORPORATE BONDS -- 93.7% ENERGY -- 13.7% Oil & Gas Drilling -- 1.4% 135,000 Rowan Companies, Inc., 5.4%, 12/1/42 $ 95,175 200,000 Trinidad Drilling, Ltd., 6.625%, 2/15/25 (144A) 185,000 ------------ $ 280,175 ------------------------------------------------------------------------------------------------------- Oil & Gas Equipment & Services -- 0.2% 50,000 SESI LLC, 7.75%, 9/15/24 (144A) $ 50,500 ------------------------------------------------------------------------------------------------------- Oil & Gas Exploration & Production -- 6.2% 101,000 Antero Resources Corp., 5.0%, 3/1/25 $ 98,980 11,000 Chesapeake Energy Corp., 8.0%, 12/15/22 (144A) 11,371 95,000 Chesapeake Energy Corp., 8.0%, 6/15/27 (144A) 90,250 80,000 Covey Park Energy LLC, 7.5%, 5/15/25 (144A) 80,300 21,000 Denbury Resources, Inc., 4.625%, 7/15/23 9,240 180,000 Extraction Oil & Gas, Inc., 7.375%, 5/15/24 (144A) 180,900 100,000 Great Western Petroleum LLC, 9.0%, 9/30/21 (144A) 99,500 The accompanying notes are an integral part of these financial statements. 16 Pioneer U.S. Corporate High Yield Fund | Annual Report | 8/31/17 ------------------------------------------------------------------------------------------------------- Effective Reference Principal Interest Index + Amount ($) Rate (a) Spread (b) Value ------------------------------------------------------------------------------------------------------- Oil & Gas Exploration & Production -- (continued) 122,000 MEG Energy Corp., 7.0%, 3/31/24 (144A) $ 96,990 150,000 Murphy Oil Corp., 6.875%, 8/15/24 158,438 17,000 Oasis Petroleum, Inc., 6.875%, 3/15/22 16,532 120,000 Sanchez Energy Corp., 6.125%, 1/15/23 91,500 106,000 SM Energy Co., 6.125%, 11/15/22 100,170 160,000 Whiting Petroleum Corp., 6.25%, 4/1/23 148,400 40,000 WPX Energy, Inc., 5.25%, 9/15/24 39,200 26,000 WPX Energy, Inc., 7.5%, 8/1/20 28,080 ------------ $ 1,249,851 ------------------------------------------------------------------------------------------------------- Oil & Gas Refining & Marketing -- 1.0% 202,000 PBF Holding Co., LLC, 7.0%, 11/15/23 $ 202,505 ------------------------------------------------------------------------------------------------------- Oil & Gas Storage & Transportation -- 4.9% 95,000 Cheniere Corpus Christi Holdings LLC, 5.875%, 3/31/25 $ 102,125 200,000 Delek Logistics Partners LP, 6.75%, 5/15/25 (144A) 201,750 136,000 Energy Transfer Equity LP, 5.875%, 1/15/24 146,540 100,000 Genesis Energy LP, 6.5%, 10/1/25 98,000 50,000 Genesis Energy LP, 6.75%, 8/1/22 50,625 100,000 NGPL PipeCo LLC, 4.375%, 8/15/22 (144A) 102,750 40,000 NuStar Logistics LP, 5.625%, 4/28/27 42,400 93,000 Sabine Pass Liquefaction LLC, 5.875%, 6/30/26 103,884 138,000 The Williams Companies, Inc., 5.75%, 6/24/44 143,175 ------------ $ 991,249 ------------ Total Energy $ 2,774,280 ------------------------------------------------------------------------------------------------------- MATERIALS -- 10.0% Commodity Chemicals -- 1.2% 151,000 NOVA Chemicals Corp., 5.0%, 5/1/25 (144A) $ 150,622 100,000 Valvoline, Inc., 4.375%, 8/15/25 (144A) 100,875 ------------ $ 251,497 ------------------------------------------------------------------------------------------------------- Diversified Chemicals -- 1.1% 205,000 CF Industries, Inc., 3.45%, 6/1/23 $ 199,362 25,000 Hexion, Inc., 6.625%, 4/15/20 22,750 ------------ $ 222,112 ------------------------------------------------------------------------------------------------------- Specialty Chemicals -- 0.7% 140,000 Kraton Polymers LLC, 7.0%, 4/15/25 (144A) $ 150,500 ------------------------------------------------------------------------------------------------------- Metal & Glass Containers -- 1.0% 200,000 Ardagh Packaging Finance Plc, 4.625%, 5/15/23 (144A) $ 205,500 ------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer U.S. Corporate High Yield Fund | Annual Report | 8/31/17 17 Schedule of Investments | 8/31/17 (continued) ------------------------------------------------------------------------------------------------------- Effective Reference Principal Interest Index + Amount ($) Rate (a) Spread (b) Value ------------------------------------------------------------------------------------------------------- Aluminum -- 1.3% 250,000 Constellium NV, 6.625%, 3/1/25 (144A) $ 262,500 ------------------------------------------------------------------------------------------------------- Diversified Metals & Mining -- 0.9% 68,000 Prince Mineral Holding Corp., 11.5%, 12/15/19 (144A) $ 70,210 100,000 Coeur Mining, Inc., 5.875%, 6/1/24 (144A) 100,000 ------------ $ 170,210 ------------------------------------------------------------------------------------------------------- Gold -- 0.5% 100,000 Kinross Gold Corp., 4.5%, 7/15/27 (144A) $ 100,000 ------------------------------------------------------------------------------------------------------- Steel -- 3.3% 100,000 AK Steel Corp., 6.375%, 10/15/25 $ 98,750 200,000 Big River Steel LLC, 7.25%, 9/1/25 (144A) 209,500 100,000 Commercial Metals Co., 5.375%, 7/15/27 104,250 150,000 United States Steel Corp., 6.875%, 8/15/25 152,625 90,000 Zekelman Industries, Inc., 9.875%, 6/15/23 (144A) 100,800 ------------ $ 665,925 ------------ Total Materials $ 2,028,244 ------------------------------------------------------------------------------------------------------- CAPITAL GOODS -- 8.4% Aerospace & Defense -- 0.7% 135,000 Engility Corp., 8.875%, 9/1/24 $ 147,319 ------------------------------------------------------------------------------------------------------- Building Products -- 1.2% 190,000 Builders FirstSource, Inc., 5.625%, 9/1/24 (144A) $ 198,550 48,000 Standard Industries, Inc., 5.375%, 11/15/24 (144A) 50,160 ------------ $ 248,710 ------------------------------------------------------------------------------------------------------- Construction & Engineering -- 2.2% 90,000 AECOM, 5.875%, 10/15/24 $ 98,438 193,000 Amsted Industries, Inc., 5.375%, 9/15/24 (144A) 200,961 140,000 Tutor Perini Corp., 6.875%, 5/1/25 (144A) 150,500 ------------ $ 449,899 ------------------------------------------------------------------------------------------------------- Industrial Conglomerates -- 2.4% 147,000 CSVC Acquisition Corp., 7.75%, 6/15/25 (144A) $ 141,488 141,000 JB Poindexter & Co., Inc., 9.0%, 4/1/22 (144A) 147,698 190,000 Park-Ohio Industries, Inc., 6.625%, 4/15/27 202,112 ------------ $ 491,298 ------------------------------------------------------------------------------------------------------- Construction & Farm Machinery & Heavy Trucks -- 0.8% 145,000 Meritor, Inc., 6.25%, 2/15/24 $ 152,612 ------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 18 Pioneer U.S. Corporate High Yield Fund | Annual Report | 8/31/17 ------------------------------------------------------------------------------------------------------- Effective Reference Principal Interest Index + Amount ($) Rate (a) Spread (b) Value ------------------------------------------------------------------------------------------------------- Industrial Machinery -- 0.3% 50,000 EnPro Industries, Inc., 5.875%, 9/15/22 (144A) $ 52,125 ------------------------------------------------------------------------------------------------------- Trading Companies & Distributors -- 0.8% 150,000 H&E Equipment Services, Inc., 5.625%, 9/1/25 (144A) $ 154,875 ------------ Total Capital Goods $ 1,696,838 ------------------------------------------------------------------------------------------------------- COMMERCIAL SERVICES & SUPPLIES -- 0.0%+ Commercial Printing -- 0.0%+ 12,000 Cenveo Corp., 6.0%, 8/1/19 (144A) $ 9,870 ------------ Total Commercial Services & Supplies $ 9,870 ------------------------------------------------------------------------------------------------------- TRANSPORTATION -- 1.5% Airlines -- 1.5% 99,000 DAE Funding LLC, 5.0%, 8/1/24 (144A) $ 101,228 205,000 Intrepid Aviation Group Holdings LLC, 6.875%, 2/15/19 (144A) 200,131 ------------ $ 301,359 ------------ Total Transportation $ 301,359 ------------------------------------------------------------------------------------------------------- AUTOMOBILES & COMPONENTS -- 2.2% Auto Parts & Equipment -- 1.7% 150,000 Cooper-Standard Automotive, Inc., 5.625%, 11/15/26 (144A) $ 150,938 191,000 TI Group Automotive Systems LLC, 8.75%, 7/15/23 (144A) 201,318 ------------ $ 352,256 ------------------------------------------------------------------------------------------------------- Automobile Manufacturers -- 0.5% 95,000 Dana Financing Luxembourg Sarl, 5.75%, 4/15/25 (144A) $ 99,156 ------------ Total Automobiles & Components $ 451,412 ------------------------------------------------------------------------------------------------------- CONSUMER DURABLES & APPAREL -- 4.7% Home Furnishings -- 0.7% 147,000 Tempur Sealy International, Inc., 5.5%, 6/15/26 $ 151,726 ------------------------------------------------------------------------------------------------------- Homebuilding -- 4.0% 190,000 Beazer Homes USA, Inc., 6.75%, 3/15/25 $ 199,975 179,000 KB Home, 7.625%, 5/15/23 201,822 100,000 Meritage Homes Corp., 5.125%, 6/6/27 (144A) 99,625 189,000 Taylor Morrison Communities, Inc., 5.875%, 4/15/23 (144A) 200,340 100,000 TRI Pointe Group, Inc., 5.25%, 6/1/27 101,250 ------------ $ 803,012 ------------ Total Consumer Durables & Apparel $ 954,738 ------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer U.S. Corporate High Yield Fund | Annual Report | 8/31/17 19 Schedule of Investments | 8/31/17 (continued) ------------------------------------------------------------------------------------------------------- Effective Reference Principal Interest Index + Amount ($) Rate (a) Spread (b) Value ------------------------------------------------------------------------------------------------------- CONSUMER SERVICES -- 4.9% Casinos & Gaming -- 3.1% 191,000 Eldorado Resorts, Inc., 6.0%, 4/1/25 $ 202,938 200,000 International Game Technology Plc, 6.5%, 2/15/25 (144A) 224,500 182,000 Scientific Games International, Inc., 10.0%, 12/1/22 202,475 ------------ $ 629,913 ------------------------------------------------------------------------------------------------------- Hotels, Resorts & Cruise Lines -- 0.8% 150,000 Viking Cruises, Ltd., 6.25%, 5/15/25 (144A) $ 153,000 ------------------------------------------------------------------------------------------------------- Specialized Consumer Services -- 1.0% 181,000 Prime Security Services Borrower LLC, 9.25%, 5/15/23 (144A) $ 200,005 ------------ Total Consumer Services $ 982,918 ------------------------------------------------------------------------------------------------------- MEDIA -- 8.0% Broadcasting -- 3.2% 194,000 CCO Holdings LLC, 5.5%, 5/1/26 (144A) $ 202,488 195,000 Gray Television, Inc., 5.875%, 7/15/26 (144A) 200,850 147,000 Nexstar Broadcasting, Inc., 5.625%, 8/1/24 (144A) 152,145 100,000 Sinclair Television Group, Inc., 5.125%, 2/15/27 (144A) 97,000 ------------ $ 652,483 ------------------------------------------------------------------------------------------------------- Cable & Satellite -- 3.6% 200,000 CSC Holdings LLC, 5.5%, 4/15/27 (144A) $ 208,750 97,000 DISH DBS Corp., 5.875%, 11/15/24 104,639 190,000 Sirius XM Radio, Inc., 5.375%, 7/15/26 (144A) 199,500 196,000 Videotron, Ltd., 5.125%, 4/15/27 (144A) 201,880 ------------ $ 714,769 ------------------------------------------------------------------------------------------------------- Movies & Entertainment -- 1.2% 100,000 AMC Entertainment Holdings, Inc., 6.125%, 5/15/27 $ 93,625 150,000 Netflix, Inc., 4.375% 11/15/26 146,250 ------------ $ 239,875 ------------ Total Media $ 1,607,127 ------------------------------------------------------------------------------------------------------- RETAILING -- 1.1% Specialty Stores -- 0.6% 59,000 PetSmart, Inc., 7.125%, 3/15/23 (144A) $ 48,085 75,000 PetSmart, Inc., 5.875%, 6/1/25 (144A) 66,938 ------------ $ 115,023 ------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 20 Pioneer U.S. Corporate High Yield Fund | Annual Report | 8/31/17 ------------------------------------------------------------------------------------------------------- Effective Reference Principal Interest Index + Amount ($) Rate (a) Spread (b) Value ------------------------------------------------------------------------------------------------------- Automotive Retail -- 0.5% 100,000 Penske Automotive Group, Inc., 3.75%, 8/15/20 $ 101,990 ------------ Total Retailing $ 217,013 ------------------------------------------------------------------------------------------------------- FOOD, BEVERAGE & TOBACCO -- 1.0% Packaged Foods & Meats -- 0.5% 100,000 Post Holdings, Inc., 5.0%, 8/15/26 (144A) $ 100,000 ------------------------------------------------------------------------------------------------------- Tobacco -- 0.5% 98,000 Alliance One International, Inc., 8.5%, 4/15/21 $ 102,165 ------------ Total Food, Beverage & Tobacco $ 202,165 ------------------------------------------------------------------------------------------------------- HOUSEHOLD & PERSONAL PRODUCTS -- 0.5% Personal Products -- 0.5% 125,000 Revlon Consumer Products Corp., 6.25%, 8/1/24 $ 100,929 ------------ Total Household & Personal Products $ 100,929 ------------------------------------------------------------------------------------------------------- HEALTH CARE EQUIPMENT & SERVICES -- 6.5% Health Care Services -- 1.4% 100,000 BioScrip, Inc., 8.875%, 2/15/21 $ 91,000 198,000 Universal Hospital Services, Inc., 7.625%, 8/15/20 200,970 ------------ $ 291,970 ------------------------------------------------------------------------------------------------------- Health Care Facilities -- 3.8% 55,000 CHS, 6.25%, 3/31/23 $ 55,412 100,000 CHS, Inc., 8.0%, 11/15/19 99,125 142,000 HCA, Inc., 5.375%, 2/1/25 149,810 164,000 Kindred Healthcare, Inc., 6.375%, 4/15/22 149,240 100,000 LifePoint Health, Inc., 5.375%, 5/1/24 103,500 189,000 RegionalCare Hospital Partners Holdings, Inc., 8.25%, 5/1/23 (144A) 200,576 ------------ $ 757,663 ------------------------------------------------------------------------------------------------------- Managed Health Care -- 1.3% 95,000 Molina Healthcare, Inc., 5.375%, 11/15/22 $ 99,038 150,000 WellCare Health Plans, Inc., 5.25%, 4/1/25 157,125 ------------ $ 256,163 ------------ Total Health Care Equipment & Services $ 1,305,796 ------------------------------------------------------------------------------------------------------- PHARMACEUTICALS, BIOTECHNOLOGY & LIFE SCIENCES -- 3.3% Pharmaceuticals -- 3.3% 80,000 Endo Finance LLC, 5.375%, 1/15/23 (144A) $ 67,000 200,000 Horizon Pharma, Inc., 6.625%, 5/1/23 194,000 The accompanying notes are an integral part of these financial statements. Pioneer U.S. Corporate High Yield Fund | Annual Report | 8/31/17 21 Schedule of Investments | 8/31/17 (continued) ------------------------------------------------------------------------------------------------------- Effective Reference Principal Interest Index + Amount ($) Rate (a) Spread (b) Value ------------------------------------------------------------------------------------------------------- Pharmaceuticals -- (continued) 231,000 Valeant Pharmaceuticals International, Inc., 5.875%, 5/15/23 (144A) $ 196,928 95,000 Valeant Pharmaceuticals International, Inc., 6.5%, 3/15/22 (144A) 99,631 100,000 West Street Merger Sub, Inc., 6.375%, 9/1/25 (144A) 99,625 ------------ $ 657,184 ------------ Total Pharmaceuticals, Biotechnology & Life Sciences $ 657,184 ------------------------------------------------------------------------------------------------------- BANKS -- 3.5% Diversified Banks -- 2.5% 40,000 5.90 3M LIBOR + Citigroup, Inc., Floating Rate 423 bps Note (Perpetual) $ 43,100 200,000 6.50 USSW5 + ING Groep NV, Floating Rate 444.6 bps Note, 12/29/49 214,160 227,000 8.62 USSW5 + Royal Bank of Scotland Group Plc, Floating 759.8 bps Rate Note (Perpetual) 251,402 ------------ $ 508,662 ------------------------------------------------------------------------------------------------------- Thrifts & Mortgage Finance -- 1.0% 196,000 Provident Funding Associates LP, 6.375%, 6/15/25 (144A) $ 202,860 ------------ Total Banks $ 711,522 ------------------------------------------------------------------------------------------------------- DIVERSIFIED FINANCIALS -- 2.0% Specialized Finance -- 1.0% 45,000 Cantor Fitzgerald LP, 7.875%, 10/15/19 (144A) $ 49,326 150,000 Nationstar Mortgage LLC, 6.5%, 7/1/21 153,054 ------------ $ 202,380 ------------------------------------------------------------------------------------------------------- Consumer Finance -- 1.0% 195,000 Ally Financial, Inc., 4.625%, 3/30/25 $ 203,288 ------------ Total Diversified Financials $ 405,668 ------------------------------------------------------------------------------------------------------- REAL ESTATE -- 0.2% Specialized REIT -- 0.2% 36,000 Uniti Group LP, 6.0%, 4/15/23 (144A) $ 36,090 ------------ Total Real Estate $ 36,090 ------------------------------------------------------------------------------------------------------- SOFTWARE & SERVICES -- 6.0% Internet Software & Services -- 1.0% 200,000 Cimpress NV, 7.0%, 4/1/22 (144A) $ 207,250 ------------------------------------------------------------------------------------------------------- IT Consulting & Other Services -- 2.5% 141,000 Iron Mountain US Holdings, Inc., 5.375%, 6/1/26 (144A) $ 148,755 The accompanying notes are an integral part of these financial statements. 22 Pioneer U.S. Corporate High Yield Fund | Annual Report | 8/31/17 ------------------------------------------------------------------------------------------------------- Effective Reference Principal Interest Index + Amount ($) Rate (a) Spread (b) Value ------------------------------------------------------------------------------------------------------- IT Consulting & Other Services -- (continued) 146,000 j2 Cloud Services LLC, 6.0%, 7/15/25 (144A) $ 150,562 187,000 Rackspace, 8.625%, 11/15/24 198,454 ------------ $ 497,771 ------------------------------------------------------------------------------------------------------- Data Processing & Outsourced Services -- 2.5% 192,000 Alliance Data Systems Company, 5.875, 11/1/21 $ 197,280 195,000 Cardtronics, Inc., 5.5%, 5/1/25 (144A) 199,510 94,000 First Data Corp., 7.0%, 12/1/23 (144A) 101,285 ------------ $ 498,075 ------------ Total Software & Services $ 1,203,096 ------------------------------------------------------------------------------------------------------- TECHNOLOGY HARDWARE & EQUIPMENT -- 3.9% Communications Equipment -- 2.2% 100,000 Avaya, Inc., 4/1/19 (144A) (c) $ 84,250 138,000 CommScope Technologies LLC, 6.0%, 6/15/25 (144A) 146,625 195,000 Plantronics, Inc., 5.5%, 5/31/23 (144A) 201,825 ------------ $ 432,700 ------------------------------------------------------------------------------------------------------- Computer Hardware Storage & Peripherals -- 1.7% 136,000 Dell, Inc., 7.1%, 4/15/28 $ 149,600 184,000 Diebold Nixdorf, Inc., 8.5%, 4/15/24 201,132 ------------ $ 350,732 ------------ Total Technology Hardware & Equipment $ 783,432 ------------------------------------------------------------------------------------------------------- TELECOMMUNICATION SERVICES -- 7.4% Integrated Telecommunication Services -- 4.1% 150,000 CenturyLink, Inc., 6.45%, 6/15/21 $ 156,938 200,000 Cincinnati Bell, Inc., 7.0%, 7/15/24 (144A) 198,000 107,000 Frontier Communications Corp., 9.25%, 7/1/21 98,172 140,000 GCI, Inc., 6.875%, 4/15/25 149,800 200,000 SFR Group SA, 7.375%, 5/1/26 (144A) 216,004 ------------ $ 818,914 ------------------------------------------------------------------------------------------------------- Wireless Telecommunication Services -- 3.3% 200,000 Altice Financing SA, 7.5%, 5/15/26 (144A) $ 219,040 185,000 Sprint Corp., 7.125%, 6/15/24 203,500 92,000 Sprint Corp., 7.25%, 9/15/21 101,430 141,000 T-Mobile USA, Inc., 6.625%, 4/1/23 148,579 ------------ $ 672,549 ------------ Total Telecommunication Services $ 1,491,463 ------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer U.S. Corporate High Yield Fund | Annual Report | 8/31/17 23 Schedule of Investments | 8/31/17 (continued) ------------------------------------------------------------------------------------------------------- Effective Reference Principal Interest Index + Amount ($) Rate (a) Spread (b) Value ------------------------------------------------------------------------------------------------------- UTILITIES -- 4.9% Electric Utilities -- 0.7% 150,000 AES Corp. Virginia, 5.125%, 9/1/27 $ 152,625 ------------------------------------------------------------------------------------------------------- Gas Utilities -- 1.1% 206,000 DCP Midstream Operating LP, 5.6%, 4/1/44 $ 191,580 35,000 Ferrellgas Partners LP, 8.625%, 6/15/20 31,675 ------------ $ 223,255 ------------------------------------------------------------------------------------------------------- Independent Power Producers & Energy Traders -- 3.1% 216,000 Calpine Corp., 5.75%, 1/15/25 $ 198,115 18,000 Dynegy, Inc., 8.0%, 1/15/25 (144A) 18,518 35,000 Dynegy, Inc., 8.125%, 1/30/26 (144A) 36,138 145,000 NRG Energy, Inc., 6.25%, 5/1/24 150,075 168,734 NSG Holdings LLC, 7.75%, 12/15/25 (144A) 181,810 36,000 TerraForm Power Operating LLC, 6.625%, 6/15/25 (Step) (144A) 38,160 ------------ $ 622,816 ------------ Total Utilities $ 998,696 ------------------------------------------------------------------------------------------------------- TOTAL CORPORATE BONDS (Cost $18,984,788) $ 18,919,840 ------------------------------------------------------------------------------------------------------- SENIOR FLOATING RATE LOAN INTERESTS -- 3.7%** CAPITAL GOODS -- 1.4% Aerospace & Defense -- 0.5% 24,875 3.99 LIBOR + DigitalGlobe, Inc., Term Loan, 275 bps 12/22/23 $ 24,880 75,000 2.75 LIBOR + MacDonald, Dettwiler and Associates, Ltd., 275 bps Term Loan B, 7/6/24 74,794 ------------ $ 99,674 ------------------------------------------------------------------------------------------------------- Industrial Conglomerates -- 0.9% 174,871 4.26 LIBOR + Filtration Group, Inc., Term Loan 300 bps (First Lien), 11/21/20 $ 176,237 ------------ Total Capital Goods $ 275,911 ------------------------------------------------------------------------------------------------------- CONSUMER SERVICES -- 0.1% Specialized Consumer Services -- 0.1% 24,873 6.05 LIBOR + GCA Merger Sub, Inc., Term 475 bps/ Loan (First Lien), Prime + 2/22/23 375 bps $ 25,137 ------------ Total Consumer Services $ 25,137 ------------------------------------------------------------------------------------------------------- MEDIA -- 1.6% Broadcasting -- 1.6% 99,875 4.49 LIBOR + A-L Parent LLC, Initial Term Loan 325 bps (First Lien), 11/18/23 $ 100,624 The accompanying notes are an integral part of these financial statements. 24 Pioneer U.S. Corporate High Yield Fund | Annual Report | 8/31/17 ------------------------------------------------------------------------------------------------------- Effective Reference Principal Interest Index + Amount ($) Rate (a) Spread (b) Value ------------------------------------------------------------------------------------------------------- Broadcasting -- (continued) 199,862 4.74 LIBOR + CBS Radio, Inc., Term B Loan, 10/7/23 $ 201,527 350 bps 23,549 4.49 LIBOR + Hubbard Radio LLC, Term Loan, 5/12/22 23,608 325 bps ------------ $ 325,759 ------------ Total Media $ 325,759 ------------------------------------------------------------------------------------------------------- HOUSEHOLD & PERSONAL PRODUCTS -- 0.5% Personal Products -- 0.5% 99,937 4.74 LIBOR + Revlon Consumer Products Corp., Initial 350 bps Term B Loan, 7/22/23 $ 90,211 ------------ Total Household & Personal Products $ 90,211 ------------------------------------------------------------------------------------------------------- UTILITIES -- 0.1% Independent Power Producers & Energy Traders -- 0.1% 24,522 5.80 LIBOR + TerraForm AP Acquisition Holdings LLC, Term 425 bps Loan, 6/26/22 $ 25,074 ------------ Total Utilities $ 25,074 ------------------------------------------------------------------------------------------------------- TOTAL SENIOR FLOATING RATE LOAN INTERESTS (Cost $744,777) $ 742,092 ------------------------------------------------------------------------------------------------------- TOTAL INVESTMENT IN UNAFFILIATED ISSUERS -- 100.4% (Cost $20,320,174) $ 20,260,432 ------------------------------------------------------------------------------------------------------- OTHER ASSETS & LIABILITIES -- (0.4)% $ (71,113) ------------------------------------------------------------------------------------------------------- NET ASSETS -- 100.0% $ 20,189,319 ======================================================================================================= + Amount rounds to less than 0.1%. (Perpetual) Security with no stated maturity date. LIBOR London-Interbank Offer Rate. PRIME U.S. Federal Funds Rate. BPS Basis Point. USSW5 USD Swap Semi Annual 30/360 5Yr. (Step) Bond issued with an initial coupon rate which converts to a higher rate at a later date. REIT Real Estate Investment Trust. (144A) Security is exempt from registration under Rule 144A of the Securities Act of 1933. Such securities may be resold normally to qualified institutional buyers in a transaction exempt from registration. At August 31, 2017, the value of these securities amounted to $10,655,571 or 52.8% of net assets. The accompanying notes are an integral part of these financial statements. Pioneer U.S. Corporate High Yield Fund | Annual Report | 8/31/17 25 Schedule of Investments | 8/31/17 (continued) ** Senior floating rate loan interests in which the Fund invests generally pay interest at rates that are periodically redetermined by reference to a base lending rate plus a premium. These base lending rates are generally (i) the lending rate offered by one or more major European banks, such as LIBOR (London InterBank Offered Rate), (ii) the prime rate offered by one or more major U.S. banks, (iii) the certificate of deposit or (iv) other base lending rates used by commercial lenders. The rate shown is the coupon rate at period end. (a) Debt obligation with a variable interest rate. Rate shown is rate at period end. (b) Floating rate note. Reference index and spread shown at period end. (c) Security issued with a zero coupon. Income is earned through accretion of discount. Purchases and sales of securities (excluding temporary cash investments) for the period ended August 31, 2017 were as follows: -------------------------------------------------------------------------------- Purchases Sales -------------------------------------------------------------------------------- Long-Term U.S. Government $ -- $ -- Other Long-Term Securities $ 25,425,909 $ 5,140,160 The Fund is permitted to engage in purchase and sale transactions ("cross trades") with certain Funds and accounts for which Amundi Pioneer Asset Management, Inc., formerly Pioneer Investment Management, Inc. (the Adviser) serves as investment adviser, as set forth in Rule 17a-7 under the Investment Company Act of 1940, pursuant to procedures adopted by the Board of Trustees. Under these procedures, cross trades are effected at current market prices. During the period ended August 31, 2017 the Fund did not engage in cross trade activity. At August 31, 2017, the net unrealized depreciation on investments based on cost for federal income tax purposes of $20,321,408 was as follows: Aggregate gross unrealized appreciation for all investments in which there is an excess of value over tax cost $ 97,252 Aggregate gross unrealized depreciation for all investments in which there is an excess of tax cost over value (158,228) ------------ Net unrealized depreciation $ (60,976) ============ Various inputs are used in determining the value of the Fund's investments. These inputs are summarized in the three broad levels listed below. Level 1 - quoted prices in active markets for identical securities. Level 2 - other significant observable inputs (including quoted prices for similar securities, interest rates, prepayment speeds, credit risk, etc.) See Notes to Financial Statements -- Note 1A. Level 3 - significant unobservable inputs (including the Fund's own assumptions in determining fair value of investments) See Notes to Financial Statements -- Note 1A. The following is a summary of the inputs used as of August 31, 2017, in valuing the Fund's investments: ------------------------------------------------------------------------------------------------------- Level 1 Level 2 Level 3 Total ------------------------------------------------------------------------------------------------------- Convertible Corporate Bonds $ -- $ 245,962 $ -- $ 245,962 Convertible Preferred Stocks 352,538 -- -- 352,538 Corporate Bonds -- 18,919,840 -- 18,919,840 Senior Floating Rate Loan Interests -- 742,092 -- 742,092 ------------------------------------------------------------------------------------------------------- Total $ 352,538 $19,907,894 $ -- $20,260,432 ======================================================================================================= The accompanying notes are an integral part of these financial statements. 26 Pioneer U.S. Corporate High Yield Fund | Annual Report | 8/31/17 Statement of Assets and Liabilities | 8/31/17 ASSETS: Investment in unaffiliated issuers at value (cost $20,320,174) $20,260,432 Receivables -- Investment securities sold 319,567 Interest 309,800 Dividends 2,813 Due from the Adviser 22,125 Other assets 4,738 --------------------------------------------------------------------------------- Total assets $20,919,475 ================================================================================= LIABILITIES: Payables -- Investment securities purchased $ 580,219 Trustee fees 1,236 Audit expense payable 45,116 Due to custodian 86,275 Due to affiliates Adviser expense payable 3,077 Other due to affiliates 1,483 Accrued expenses 12,750 --------------------------------------------------------------------------------- Total liabilities $ 730,156 ================================================================================= NET ASSETS: Paid-in capital $20,178,961 Undistributed net investment income 9,613 Net realized gain on investments 60,487 Net unrealized depreciation on investments (59,742) --------------------------------------------------------------------------------- Net assets $20,189,319 ================================================================================= NET ASSET VALUE PER SHARE: (No par value, unlimited number of shares authorized) Class A (based on $8,076,437/790,327 shares) $ 10.22 Class C (based on $4,031,824/394,858 shares) $ 10.21 Class Y (based on $8,081,058/790,714 shares) $ 10.22 MAXIMUM OFFERING PRICE: Class A ($10.22/ 95.5%) $ 10.70 ================================================================================= The accompanying notes are an integral part of these financial statements. Pioneer U.S. Corporate High Yield Fund | Annual Report | 8/31/17 27 Statement of Operations For the period from 1/3/17 (Commencement of Operations) to 8/31/17 INVESTMENT INCOME: Interest from unaffiliated issuers $228,198 Dividends from unaffiliated issuers 4,663 ----------------------------------------------------------------------------------- Total investment income $ 232,861 ----------------------------------------------------------------------------------- EXPENSES: Management fees $ 25,855 Distribution fees Class A 4,310 Class C 8,604 Shareholder communication expense 276 Administrative expense 5,356 Custodian fees 5,036 Registration fees 5,408 Professional fees 75,019 Printing expense 27,199 Fees and expenses of nonaffiliated Trustees 4,739 Miscellaneous 7,129 ----------------------------------------------------------------------------------- Total expenses $ 168,931 Less fees waived and expenses reimbursed by the Adviser $ (123,457) Net expenses $ 45,474 ----------------------------------------------------------------------------------- Net investment income $ 187,387 ----------------------------------------------------------------------------------- REALIZED AND UNREALIZED GAIN (LOSS) ON INVESTMENTS, Net realized gain (loss) on: Investments from unaffiliated issuers $ 61,674 ----------------------------------------------------------------------------------- Net unrealized appreciation (depreciation) on: Investments from unaffiliated issuers $ (59,742) ----------------------------------------------------------------------------------- Net realized and unrealized gain (loss) on investments $ 1,932 ----------------------------------------------------------------------------------- Net increase in net assets resulting from operations $ 189,319 =================================================================================== The accompanying notes are an integral part of these financial statements. 28 Pioneer U.S. Corporate High Yield Fund | Annual Report | 8/31/17 Statement of Changes in Net Assets ----------------------------------------------------------------------------------- 1/3/17 (a) to 8/31/17 ----------------------------------------------------------------------------------- FROM OPERATIONS: Net investment income $ 187,387 Net realized gain (loss) on investments 61,674 Net unrealized appreciation (depreciation) on investments (59,742) ----------------------------------------------------------------------------------- Net increase in net assets resulting from operations $ 189,319 ----------------------------------------------------------------------------------- DISTRIBUTIONS TO SHAREOWNERS: Net investment income: Class A ($0.28 per share) $ (73,903) Class C ($0.23 per share) (30,917) Class Y ($0.29 per share) (77,862) ----------------------------------------------------------------------------------- Total distributions to shareowners $ (182,682) ----------------------------------------------------------------------------------- FROM FUND SHARE TRANSACTIONS: (b) Net proceeds from sale of shares $ 20,000,000 Reinvestment of distributions 182,682 Cost of shares repurchased -- ----------------------------------------------------------------------------------- Net increase in net assets resulting from Fund share transactions $ 20,182,682 ----------------------------------------------------------------------------------- Net increase in net assets $ 20,189,319 NET ASSETS: Beginning of period $ -- ----------------------------------------------------------------------------------- End of period $ 20,189,319 ----------------------------------------------------------------------------------- Undistributed net investment income $ 9,613 =================================================================================== (a) Class A, Class C and Class Y shares commenced operations on January 3, 2017. (b) At August 31, 2017 the Adviser owned 100.0% of the value of the outstanding shares of Pioneer U.S. Corporate High Yield Fund. The accompanying notes are an integral part of these financial statements. Pioneer U.S. Corporate High Yield Fund | Annual Report | 8/31/17 29 Statement of Changes in Net Assets (continued) ----------------------------------------------------------------------------------- 1/3/17 to 1/3/17 to 8/31/17 8/31/17 Shares Amount ----------------------------------------------------------------------------------- Class A* Shares sold 783,090 $8,000,000 Reinvestment of distributions 7,237 73,903 Less shares repurchased -- -- ----------------------------------------------------------------------------------- Net increase 790,327 $8,073,903 =================================================================================== Class C* Shares sold 391,829 $4,000,000 Reinvestment of distributions 3,030 30,917 Less shares repurchased -- -- ----------------------------------------------------------------------------------- Net increase 394,859 $4,030,917 =================================================================================== Class Y* Shares sold 783,090 $8,000,000 Reinvestment of distributions 7,624 77,862 Less shares repurchased -- -- ----------------------------------------------------------------------------------- Net increase 790,714 $8,077,862 =================================================================================== * Class A, Class C and Class Y shares commenced operations on January 3, 2017. The accompanying notes are an integral part of these financial statements. 30 Pioneer U.S. Corporate High Yield Fund | Annual Report | 8/31/17 Financial Highlights ------------------------------------------------------------------------------------------- 1/3/17 to 8/31/17 ------------------------------------------------------------------------------------------- Class A Net asset value, beginning of period $ 10.00 ------------------------------------------------------------------------------------------- Increase (decrease) from investment operations: Net investment income (loss) $ 0.29(a) Net realized and unrealized gain (loss) on investments 0.21 ------------------------------------------------------------------------------------------- Net increase (decrease) from investment operations $ 0.50 ------------------------------------------------------------------------------------------- Distribution to shareowners: Net investment income $ (0.28) ------------------------------------------------------------------------------------------- Net increase (decrease) in net asset value $ 0.22 ------------------------------------------------------------------------------------------- Net asset value, end of period $ 10.22 =========================================================================================== Total return* 5.00%*** Ratio of net expenses to average net assets 1.02%** Ratio of net investment income (loss) to average net assets 4.40%** Portfolio turnover rate 113%** Net assets, end of period (in thousands) $ 8,076 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Total expenses to average net assets 3.89%** Net investment income (loss) to average net assets 1.53%** =========================================================================================== * Assumes initial investment at net asset value at the beginning of each period, reinvestment of all distributions, the complete redemption of the investment at net asset value at the end of each period and no sales charges. Total return would be reduced if sales charges were taken into account. ** Annualized. *** Not Annualized. (a) The per-share data presented above is based on the average shares outstanding for the period presented. The accompanying notes are an integral part of these financial statements. Pioneer U.S. Corporate High Yield Fund | Annual Report | 8/31/17 31 Financial Highlights (continued) ------------------------------------------------------------------------------------------- 1/3/17 to 8/31/17 ------------------------------------------------------------------------------------------- Class C Net asset value, beginning of period $ 10.00 ------------------------------------------------------------------------------------------- Increase (decrease) from investment operations: Net investment income (loss) $ 0.24(a) Net realized and unrealized gain (loss) on investments 0.20 ------------------------------------------------------------------------------------------- Net increase (decrease) from investment operations $ 0.44 ------------------------------------------------------------------------------------------- Distribution to shareowners: Net investment income $ (0.23) ------------------------------------------------------------------------------------------- Net increase (decrease) in net asset value $ 0.21 ------------------------------------------------------------------------------------------- Net asset value, end of period $ 10.21 =========================================================================================== Total return* 4.44%*** Ratio of net expenses to average net assets 1.75%** Ratio of net investment income (loss) to average net assets 3.67%** Portfolio turnover rate 113%** Net assets, end of period (in thousands) $ 4,032 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Total expenses to average net assets 4.63%** Net investment income (loss) to average net assets 0.79%** =========================================================================================== * Assumes initial investment at net asset value at the beginning of each period, reinvestment of all distributions, the complete redemption of the investment at net asset value at the end of each period and no sales charges. Total return would be reduced if sales charges were taken into account. ** Annualized. *** Not Annualized. (a) The per-share data presented above is based on the average shares outstanding for the period presented. The accompanying notes are an integral part of these financial statements. 32 Pioneer U.S. Corporate High Yield Fund | Annual Report | 8/31/17 ------------------------------------------------------------------------------------------- 1/3/17 to 8/31/17 ------------------------------------------------------------------------------------------- Class Y Net asset value, beginning of period $ 10.00 ------------------------------------------------------------------------------------------- Increase (decrease) from investment operations: Net investment income (loss) $ 0.31(a) Net realized and unrealized gain (loss) on investments 0.20 ------------------------------------------------------------------------------------------- Net increase (decrease) from investment operations $ 0.51 ------------------------------------------------------------------------------------------- Distribution to shareowners: Net investment income $ (0.29) ------------------------------------------------------------------------------------------- Net increase (decrease) in net asset value $ 0.22 ------------------------------------------------------------------------------------------- Net asset value, end of period $ 10.22 =========================================================================================== Total return* 5.14%*** Ratio of net expenses to average net assets 0.75%** Ratio of net investment income (loss) to average net assets 4.67%** Portfolio turnover rate 113%** Net assets, end of period (in thousands) $ 8,081 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Total expenses to average net assets 3.63%** Net investment income (loss) to average net assets 1.79%** =========================================================================================== * Assumes initial investment at net asset value at the beginning of each period, reinvestment of all distributions and the complete redemption of the investment at net asset value at the end of each period. ** Annualized. *** Not Annualized. (a) The per-share data presented above is based on the average shares outstanding for the period presented. The accompanying notes are an integral part of these financial statements. Pioneer U.S. Corporate High Yield Fund | Annual Report | 8/31/17 33 Notes to Financial Statements | 8/31/17 1. Organization and Significant Accounting Policies Pioneer U.S. Corporate High Yield Fund (the Fund) is one of three portfolios comprising Pioneer Series Trust V, a Delaware statutory trust. The Fund is registered under the Investment Company Act of 1940 as a diversified, open-end management investment company. The investment objective of the Fund is to achieve a high level of current income and long-term capital appreciation. The Fund offered three classes of shares designated as Class A, Class C and Class Y shares. Class A, Class C and Class Y commenced operations on January 3, 2017. Each class of shares represents an interest in the same portfolio of investments of the Fund and has identical rights (based on relative net asset values) to assets and liquidation proceeds. Share classes can bear different rates of class-specific fees and expenses such as transfer agent and distribution fees. Differences in class-specific fees and expenses will result in differences in net investment income and, therefore, the payment of different dividends from net investment income earned by each class. The Amended and Restated Declaration of Trust of the Fund gives the Board of Trustees the flexibility to specify either per-share voting or dollar-weighted voting when submitting matters for shareholder approval. Under per-share voting, each share of a class of the Fund is entitled to one vote. Under dollar-weighted voting, a shareholder's voting power is determined not by the number of shares owned, but by the dollar value of the shares on the record date. Each share class has exclusive voting rights with respect to matters affecting only that class, including with respect to the distribution plan for that class. There is no distribution plan for Class Y shares. On July 3, 2017, Amundi acquired Pioneer Investments, a group of asset management companies located throughout the world. Amundi, one of the world's largest asset managers, is headquartered in Paris, France. As a result of the transaction, Pioneer Investment Management, Inc., the Fund's investment adviser, became an indirect wholly owned subsidiary of Amundi and Amundi's wholly owned subsidiary, Amundi USA, Inc. Prior to July 3, 2017, Pioneer Investments was owned by Pioneer Global Asset Management S.p.A., a wholly owned subsidiary of UniCredit S.p.A. In connection with the transaction, the names of the Fund's investment adviser and principal underwriter changed. Effective July 3, 2017, the name of Pioneer Investment Management, Inc. changed to Amundi Pioneer Asset Management, Inc. (the Adviser) and the name of Pioneer Funds Distributor, Inc. changed to Amundi Pioneer Distributor, Inc. (the Distributor). 34 Pioneer U.S. Corporate High Yield Fund | Annual Report | 8/31/17 In October 2016, the Securities and Exchange Commission (SEC) released its Final Rule on Investment Company Reporting Modernization. In addition to introducing two new regulatory reporting forms (Form N-PORT and Form N-CEN), the Final Rule amends Regulation S-X, which impacts financial statement presentation, particularly related to the presentation of derivative investments. Financial statements with a period end date on or after August 1, 2017 are required to be in compliance with the amendments to Regulation S-X. The Fund's financial statements were prepared in compliance with the amendments to Regulation S-X. The Fund's financial statements have been prepared in conformity with U.S. generally accepted accounting principles (U.S. GAAP) that require the management of the Fund to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of income, expenses and gains and losses on investments during the reporting period. Actual results could differ from those estimates. The Fund is an investment company and follows investment company accounting and reporting guidance under U.S. GAAP. The following is a summary of significant accounting policies followed by the Fund in the preparation of its financial statements: A. Security Valuation The net asset value of the Fund is computed once daily, on each day the New York Stock Exchange (NYSE) is open, as of the close of regular trading on the NYSE. Fixed-income securities are valued by using prices supplied by independent pricing services, which consider such factors as market prices, market events, quotations from one or more brokers, Treasury spreads, yields, maturities and ratings, or may use a pricing matrix or other fair value methods or techniques to provide an estimated value of the security or instrument. A pricing matrix is a means of valuing a debt security on the basis of current market prices for other debt securities, historical trading patterns in the market for fixed-income securities and/or other factors. Non-U.S. debt securities that are listed on an exchange will be valued at the bid price obtained from an independent third party pricing service. When independent third party pricing services are unable to supply prices, or when prices or market quotations are considered to be unreliable, the value of that security may be determined using quotations from one or more broker-dealers. Loan interests are valued in accordance with guidelines established by the Board of Trustees at the mean between the last available bid and asked prices from one or more brokers or dealers as obtained from Loan Pricing Corporation, an independent third party pricing service. If price information Pioneer U.S. Corporate High Yield Fund | Annual Report | 8/31/17 35 is not available from Loan Pricing Corporation, or if the price information is deemed to be unreliable, price information will be obtained from an alternative loan interest pricing service. If no reliable price quotes are available from either the primary or alternative pricing service, broker quotes will be solicited. The value of foreign securities is translated into U.S. dollars based on foreign currency exchange rate quotations supplied by a third party pricing source. Trading in non-U.S. equity securities is substantially completed each day at various times prior to the close of the NYSE. The values of such securities used in computing the net asset value of the Fund's shares are determined as of such times. The fund may use a fair value model developed by an independent pricing service to value non-U.S. equity securities. Equity securities that have traded on an exchange are valued by using the last sale price on the principal exchange where they are traded. Equity securities that have not traded on the date of valuation, or securities for which sale prices are not available, generally are valued using the mean between the last bid and asked prices or, if both last bid and asked prices are not available, at the last quoted bid price. Last sale and bid and asked prices are provided by independent third party pricing services. In the case of equity securities not traded on an exchange, prices are typically determined by independent third party pricing services using a variety of techniques and methods. Securities or loan interests for which independent pricing services or broker-dealers are unable to supply prices or for which market prices and/or quotations are not readily available or are considered to be unreliable are valued by a fair valuation team comprised of certain personnel of the Adviser, pursuant to procedures adopted by the Fund's Board of Trustees. The Adviser's fair valuation team uses fair value methods approved by the Valuation Committee of the Board of Trustees. The Adviser's fair valuation team is responsible for monitoring developments that may impact fair valued securities and for discussing and assessing fair values on an ongoing basis, and at least quarterly, with the Valuation Committee of the Board of Trustees. Inputs used when applying fair value methods to value a security may include credit ratings, the financial condition of the company, current market conditions and comparable securities. The Fund may use fair value methods if it is determined that a significant event has occurred after the close of the exchange or market on which the security trades and prior to the determination of the Fund's net asset value. Examples of a significant event might include political or economic news, corporate restructurings, natural disasters, terrorist activity or trading halts. Thus, the valuation of the Fund's securities may differ significantly from exchange prices and such differences could be material. 36 Pioneer U.S. Corporate High Yield Fund | Annual Report | 8/31/17 At August 31, 2017, no securities were valued using fair value methods (other than securities valued using prices supplied by independent pricing services or broker-dealers). B. Investment Income and Transactions Dividend income is recorded on the ex-dividend date, except that certain dividends from foreign securities where the ex-dividend date may have passed are recorded as soon as the Fund becomes aware of the ex-dividend data in the exercise of reasonable diligence. Interest income, including interest on income-bearing cash accounts, is recorded on the accrual basis, net of unrecoverable foreign taxes withheld at the applicable country rates. Principal amounts of mortgage-backed securities are adjusted for monthly paydowns. Premiums and discounts related to certain mortgage-backed securities are amortized or accreted in proportion to the monthly paydowns. All discounts/premiums on purchase prices of debt securities are accreted/amortized for financial reporting purposes over the life of the respective securities, and such accretion/amortization is included in interest income. Interest and dividend income payable by delivery of additional shares is reclassified as PIK (payment-in-kind) income upon receipt and is included in interest and dividend income, respectively. Security transactions are recorded as of trade date. Gains and losses on sales of investments are calculated on the identified cost method for both financial reporting and federal income tax purposes. C. Federal Income Taxes It is the Fund's policy to comply with the requirements of the Internal Revenue Code applicable to regulated investment companies and to distribute all of its net taxable income and net realized capital gains, if any, to its shareowners. Therefore, no federal income tax provision is required. As of August 31, 2017, the Fund did not accrue any interest or penalties with respect to uncertain tax positions, which, if applicable, would be recorded as an income tax expense in the Statement of Operations. The amount and character of income and capital gain distributions to shareowners are determined in accordance with federal income tax rules, which may differ from U.S. GAAP. Distributions in excess of net investment income or net realized gains are temporary overdistributions for financial statement purposes resulting from differences in the recognition or classification of income or distributions for financial statement and tax purposes. Capital accounts within the financial statements are adjusted for permanent book/tax differences to reflect tax character, but are not adjusted Pioneer U.S. Corporate High Yield Fund | Annual Report | 8/31/17 37 for temporary differences. At August 31, 2017, the Fund reclassified $4,908 to increase undistributed net investment income and $1,187, to decrease accumulated net realized gain on investments and $3,721 to decrease paid-in capital to reflect permanent book/tax differences. These adjustments have no impact on net assets or the results of operations. The tax character of distributions during the period ended August 31, 2017 was as follows: --------------------------------------------------------------------------- 2017 --------------------------------------------------------------------------- Distributions paid from: Ordinary income $182,682 --------------------------------------------------------------------------- Total $182,682 =========================================================================== The following shows the components of distributable earnings on a federal income tax-basis at August 31, 2017: --------------------------------------------------------------------------- 2017 --------------------------------------------------------------------------- Distributable earnings: Undistributed ordinary income $ 71,334 Net unrealized depreciation (60,976) --------------------------------------------------------------------------- Total $ 10,358 =========================================================================== The difference between book-basis and tax-basis net unrealized appreciation is attributable to the tax deferral of losses on wash sales. D. Fund Shares The Fund records sales and repurchases of its shares as of trade date. The Distributor earned no underwriting commissions on the sale of Class A shares during the period ended August 31, 2017. E. Class Allocations Income, common expenses and realized and unrealized gains and losses are calculated at the Fund level and allocated daily to each class of shares based on its respective percentage of adjusted net assets at the beginning of the day. Distribution fees are calculated based on the average daily net asset value attributable to Class A and Class C shares of the Fund, respectively (see Note 4). Class Y shares do not pay distribution fees. All expenses and fees paid to the Fund's transfer agent for its services are allocated among the classes of shares based on the number of accounts in each class and the ratable allocation of related out-of-pocket expenses (see Note 3). The Fund declares as daily dividends substantially all of its net investment income. All dividends are paid on a monthly basis. Short-term capital gain distributions, if any, may be declared with the daily dividends. Distributions 38 Pioneer U.S. Corporate High Yield Fund | Annual Report | 8/31/17 to shareowners are recorded as of the ex-dividend date. Distributions paid by the Fund with respect to each class of shares are calculated in the same manner and at the same time, except that net investment income dividends to Class A, Class C and Class Y shares can reflect different transfer agent and distribution expense rates. F. Risks The value of securities held by the fund may go up or down, sometimes rapidly or unpredictably, due to general market conditions, such as real or perceived adverse economic, political or regulatory conditions, inflation, changes in interest rates, lack of liquidity in the bond markets or adverse investor sentiment. In the past several years, financial markets have experienced increased volatility, depressed valuations, decreased liquidity and heightened uncertainty. These conditions may continue, recur, worsen or spread. At times, the Fund's investments may represent industries or industry sectors that are interrelated or have common risks, making the Fund more susceptible to any economic, political, or regulatory developments or other risks affecting those industries and sectors. The Fund invests in below investment grade (high yield) debt securities and preferred stocks. Some of these high yield securities may be convertible into equity securities of the issuer. Debt securities rated below investment grade are commonly referred to as "junk bonds" and are considered speculative. These securities involve greater risk of loss, are subject to greater price volatility, and are less liquid, especially during periods of economic uncertainty or change, than higher rated debt securities. The Fund's prospectus contains unaudited information regarding the Fund's principal risks. Please refer to that document when considering the Fund's principal risks. Interest rates in the U.S. recently have been historically low, so the Fund faces a heightened risk that interest rates may rise. A general rise in interest rates may cause investors to move out of fixed income securities on a large scale, which could adversely affect the price and liquidity of fixed income securities and could also result in increased redemptions from the Fund. Certain securities in which the Fund invests, including floating rate loans, once sold, may not settle for an extended period (for example, several weeks or even longer). The Fund will not receive its sale proceeds until that time, which may constrain the Fund's ability to meet its obligations (including obligations to redeeming shareholders). Pioneer U.S. Corporate High Yield Fund | Annual Report | 8/31/17 39 2. Management Agreement The Adviser manages the Fund's portfolio. Management fees are calculated daily at the annual rate of 0.60% of the Fund's average daily net assets up to $1 billion and 0.55% on assets over $1 billion. For the period ended August 31, 2017, the effective management fee (excluding waivers and/or assumption of expenses) was equivalent to 0.60% of the Fund's average daily net assets. The Adviser has contractually agreed to limit ordinary operating expenses of the Fund to the extent required to reduce Fund expenses to 1.05%, 1.80% and 0.75% of the average daily net assets attributable to Class A, Class C, and Class Y shares, respectively. Fees waived and expenses reimbursed during the period ended August 31, 2017 are reflected on the Statement of Operations. These expense limitations are in effect through January 1, 2019. There can be no assurance that the Adviser will extend the expense limitation agreement for a class of shares beyond the date referred to above. In addition, under the management and administration agreements, certain other services and costs, including accounting, regulatory reporting and insurance premiums, are paid by the Fund as administrative reimbursements. Included in "Due to affiliates" reflected on the Statement of Assets and Liabilities is $3,077 in management fees, administrative costs and certain other reimbursements payable to the Adviser at August 31, 2017. 3. Transfer Agent Boston Financial Data Services, Inc. serves as the transfer agent to the Fund at negotiated rates. Transfer agent fees and payables shown on the Statement of Operations and the Statement of Assets and Liabilities, respectively, include sub-transfer agent expenses incurred through the Fund's omnibus relationship contracts. In addition, the Fund reimbursed the transfer agent for out-of-pocket expenses incurred by the transfer agent related to shareholder communications activities such as proxy and statement mailings and outgoing phone calls. For the period ended August 31, 2017, such out-of-pocket expenses by class of shares were as follows: -------------------------------------------------------------------------------- Shareholder Communications: -------------------------------------------------------------------------------- Class A $ 266 Class C 5 Class Y 5 -------------------------------------------------------------------------------- Total $ 276 ================================================================================ 40 Pioneer U.S. Corporate High Yield Fund | Annual Report | 8/31/17 4. Distribution and Service Plans The Fund has adopted a distribution plan (the Plan) pursuant to Rule 12b-1 of the Investment Company Act of 1940 with respect to its Class A and Class C shares (the Plan). Pursuant to the Plan, the Fund pays the Distributor 0.25% of the average daily net assets attributable to Class A shares as compensation for personal services and/or account maintenance services or distribution services with regard to Class A shares. Pursuant to the Plan, the Fund also pays the Distributor 1.00% of the average daily net assets attributable to Class C shares. The fee for Class C shares consists of a 0.25% service fee and a 0.75% distribution fee paid as compensation for personal services and/or account maintenance services or distribution services with regard to Class C shares. Included in "Due to affiliates" reflected on the Statement of Assets and Liabilities is $1,483 in distribution fees payable to the Distributor August 31, 2017. In addition, redemptions of each class of shares (except Class Y shares) may be subject to a contingent deferred sales charge (CDSC). A CDSC of 1.00% may be imposed on redemptions of certain net asset value purchases of Class A shares within 12 months of purchase. Redemptions of Class C shares within 12 months of purchase are subject to a CDSC of 1.00% based on the lower of cost or market value of shares being redeemed. Shares purchased as part of an exchange remain subject to any CDSC that applied to the original purchase of those shares. There is no CDSC for Class Y shares. Proceeds from the CDSCs are paid to the Distributor. For the period ended August 31, 2017 no CDSCs were paid to the Distributor. 5. Unfunded Loan Commitments The Fund may enter into unfunded loan commitments. Unfunded loan commitments may be partially or wholly unfunded. During the contractual period, the Fund is obligated to provide funding to the borrower upon demand. A fee is earned by the Fund on the unfunded commitment and is recorded as interest income in the Statement of Operations. As of August 31, 2017, the Fund had the following unfunded loan commitment outstanding: -------------------------------------------------------------------------------- Unrealized Appreciation/ Loan Shares Cost Value Depreciation -------------------------------------------------------------------------------- Staples, Inc., Bridge Loan 10,000 $10,000 $10,000 $ -- -------------------------------------------------------------------------------- Total $10,000 $10,000 $ -- ================================================================================ Pioneer U.S. Corporate High Yield Fund | Annual Report | 8/31/17 41 6. Results of Shareholder Meeting At a special meeting held on June 13, 2017, shareholders of the Fund were asked to consider the proposals described below. A report of the total votes cast by the Fund's shareholders (or, with respect to Proposal 2, by shareholders of Pioneer Series Trust V, as noted below) follows: -------------------------------------------------------------------------------- For Against Abstain Broker Non-Votes -------------------------------------------------------------------------------- Proposal 1 - To approve 501,904.416 0.000 0.000 0.000 an New Management Agreement with the Adviser -------------------------------------------------------------------------------- For Withhold -------------------------------------------------------------------------------- Proposal 2 - To elect Trustees* -------------------------------------------------------------------------------- David R. Bock 52,906,413.845 1,033,842.093 -------------------------------------------------------------------------------- Benjamin M. Friedman 52,887,736.342 1,052,519.596 -------------------------------------------------------------------------------- Margaret B.W. Graham 52,932,507.056 1,007,748.882 -------------------------------------------------------------------------------- Lisa M. Jones 52,966,747.756 973,508.182 -------------------------------------------------------------------------------- Lorraine H. Monchak 52,946,675.492 993,580.446 -------------------------------------------------------------------------------- Thomas J. Perna 52,911,994.971 1,028,260.967 -------------------------------------------------------------------------------- Marguerite A. Piret 52,949,595.338 990,660.600 -------------------------------------------------------------------------------- Fred J. Ricciardi 52,895,139.856 1,045,116.082 -------------------------------------------------------------------------------- Kenneth J. Taubes 52,940,075.518 1,000,180.420 -------------------------------------------------------------------------------- * Proposal 2 was voted on and approved by all series of Pioneer Series Trust V. Results reported above reflect the combined votes of all series of the Trust. 42 Pioneer U.S. Corporate High Yield Fund | Annual Report | 8/31/17 Report of Independent Registered Public Accounting Firm To the Board of Trustees of Pioneer Series Trust V and the Shareholders of Pioneer U.S. Corporate High Yield Fund: -------------------------------------------------------------------------------- We have audited the accompanying statement of assets and liabilities of Pioneer U.S. Corporate High Yield Fund (the "Fund"), one of the funds constituting Pioneer Series Trust V (the "Trust"), including the schedule of investments, as of August 31, 2017, and the related statements of operations, changes in net assets and the financial highlights for the period from January 3, 2017 (commencement of operations) to August 31, 2017. These financial statements and financial highlights are the responsibility of the Fund's management. Our responsibility is to express an opinion on these financial statements and financial highlights based on our audit. We conducted our audit in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements and financial highlights are free of material misstatement. We were not engaged to perform an audit of the Fund's internal control over financial reporting. Our audit included consideration of internal control over financial reporting as a basis for designing audit procedures that are appropriate in the circumstances, but not for the purpose of expressing an opinion on the effectiveness of the Fund's internal control over financial reporting. Accordingly, we express no such opinion. An audit also includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements and financial highlights, assessing the accounting principles used and significant estimates made by management, and evaluating the overall financial statement presentation. Our procedures included confirmation of securities owned as of August 31, 2017, by correspondence with the custodian, brokers and others or by other appropriate auditing procedures where replies from brokers and others were not received. We believe that our audit provides a reasonable basis for our opinion. In our opinion, the financial statements and financial highlights referred to above present fairly, in all material respects, the financial position of Pioneer U.S. Corporate High Yield Fund at August 31, 2017, the results of its operations, the changes in its net assets and the financial highlights for the for the period from January 3, 2017 (commencement of operations) to August 31, 2017, in conformity with U.S. generally accepted accounting principles. /s/ Ernst & Young LLP Boston, Massachusetts October 27, 2017 Pioneer U.S. Corporate High Yield Fund | Annual Report | 8/31/17 43 ADDITIONAL INFORMATION (unaudited) The percentages of the Fund's ordinary income distributions that are exempt from nonresident alien (NRA) tax withholding resulting from qualified interest income was 84.69%. 44 Pioneer U.S. Corporate High Yield Fund | Annual Report | 8/31/17 Approval of New and Interim Management Agreements Amundi Pioneer Asset Management, Inc. (Amundi Pioneer), formerly Pioneer Investment Management, Inc., serves as the investment adviser to Pioneer U.S. Corporate High Yield Fund (the Fund) pursuant to an investment management agreement between Amundi Pioneer and the Fund. On July 3, 2017, Amundi acquired Pioneer Investments, a group of asset management companies located throughout the world (the "Transaction"). As a result of the Transaction, Amundi Pioneer became an indirect wholly-owned subsidiary of Amundi and Amundi's wholly-owned subsidiary, Amundi USA, Inc. Prior to July 3, 2017, Pioneer Investments was owned by Pioneer Global Asset Management S.p.A. ("PGAM"), a wholly-owned subsidiary of UniCredit S.p.A. ("UniCredit"). Under the Investment Company Act of 1940, the Fund's current investment management agreement (the "Current Management Agreement") terminated automatically upon the consummation of the Transaction. In order for Amundi Pioneer to continue to manage the Fund after the consummation of the Transaction, the Trustees and shareholders of the Fund were required to approve a new investment management agreement for the Fund (the "New Management Agreement"). As discussed below, the Board of Trustees of the Fund approved the New Management Agreement at a meeting held on March 6-7, 2017. The New Management Agreement was approved by the shareholders of the Fund at a meeting held on June 13, 2017. The Board of Trustees of the Fund also approved an interim investment management agreement between Amundi Pioneer and the Fund (the "Interim Management Agreement") at the March 6-7, 2017 meeting. The Interim Management Agreement would have taken effect upon the closing of the Transaction in the event that the shareholders of the Fund did not approve the New Management Agreement. Board Evaluation of the New and Interim Management Agreements The Board evaluated the Transaction and the New Management Agreement and Interim Management Agreement for the Fund. In connection with their evaluation of the Transaction and the New Management Agreement for the Fund, the Trustees requested such information as they deemed reasonably necessary, including: (a) the structure of the Transaction and the strategy underlying the Transaction; (b) the anticipated benefits of the Transaction to the Fund and its shareholders; (c) the post-Transaction plans for Amundi Pioneer, including Amundi's plans for integration of Pioneer Investments and Amundi Pioneer with its existing asset management businesses and plans for the future development of Amundi Pioneer; (d) the effect of the Transaction on the ongoing services provided to the Fund, including the need to select a Pioneer U.S. Corporate High Yield Fund | Annual Report | 8/31/17 45 new independent registered public accounting firm for the Fund, and any plans to modify the operations of the Fund; (e) the stability and continuity of Amundi Pioneer's management and key employees, including compensation and benefits to Amundi Pioneer's key employees, and retention plans and incentive plan structure; (f) the post-Transaction indebtedness and financial resources of Amundi Pioneer; (g) Amundi's legal and operational structure, its principal shareholders and senior management, its investment management, risk management, administrative, legal and compliance functions; (h) certain regulatory matters relating to Amundi's affiliates; and (i) Amundi's commitment to the United States, including the role of Amundi Pioneer in the larger Amundi business. The Trustees also requested and obtained the following information in connection with their evaluation of the Transaction and the New Management Agreement for the Fund: (i) memoranda provided by Fund counsel that summarized the legal standards and other considerations that are relevant to the Trustees in their deliberations regarding the New Management Agreement; (ii) the qualifications of the investment management teams for the Fund, as well as the level of investment by the Fund's portfolio managers in the Fund; (iii) the Fund's management fees and total expense ratios, the financial statements of Amundi Pioneer and its pre- and post-Transaction parent companies, profitability analyses from Amundi Pioneer, and analyses from Amundi Pioneer as to possible economies of scale; (iv) the profitability of the institutional business of Amundi Pioneer and Amundi Pioneer's affiliate, Amundi Pioneer Institutional Asset Management, Inc. ("Amundi Pioneer Institutional") as compared to that of Amundi Pioneer's fund management business; and (v) the differences between the fees and expenses of the Fund and the fees and expenses of Amundi Pioneer's and Amundi Pioneer Institutional's institutional accounts, as well as the different services provided by Adviser to the Fund and by Amundi Pioneer and Amundi Pioneer Institutional to the institutional accounts. In addition, the Trustees considered the information provided at regularly scheduled meetings throughout the year regarding the Fund's performance and risk attributes, including through meetings with investment management personnel, and took into account other information related to the Fund provided to the Trustees at regularly scheduled meetings. The Trustees also considered information they had received in their review of the continuance of the Current Management Agreement for the Fund in September 2016. At meetings held on January 9, 2017 and January 10, 2017, the Trustees met with representatives of Amundi and PGAM, including separate meetings of the Trustees who are not "interested persons" of the Fund Complex ("Independent Trustees") and counsel with representatives of Amundi and PGAM, and subsequently with representatives of Amundi. In those meetings, 46 Pioneer U.S. Corporate High Yield Fund | Annual Report | 8/31/17 they received an extensive presentation from the representatives of Amundi, including the chief executive officer of Amundi, describing Amundi's background and history, its global asset management activities, the growth of its business, and its status as the largest asset management firm in Europe and one of the largest globally; its capital structure and financial resources, including information as to the financing of the Transaction; its principal investors, including its majority investor Credit Agricole S.A., and Credit Agricole's long-term commitment to the asset management business; the philosophy and strategy underlying the Transaction and the complementarity of Amundi's and Pioneer Investments' respective asset management businesses; Amundi's various operating and investment committees and how they would likely interact with Amundi Pioneer; the proposed integration process, including the progress to date and the establishment of various integration work streams; Amundi's plans for management of Amundi Pioneer; Amundi's philosophy as to compensation of key employees and its general intentions with respect to incentive plans for key employees of Amundi Pioneer; Amundi's preliminary plans to achieve cost and other synergies; and opportunities to further develop the business of Amundi Pioneer and Amundi Pioneer Institutional, including in the area of institutional asset management, and how that would benefit shareholders of the Pioneer Funds. In those meetings, the representatives of Amundi confirmed their intention that the Chief Executive Officer and Chief Investment Officer of Amundi Pioneer would remain in their current positions, and confirmed that they do not currently foresee major changes in the day-to-day investment management operations of Amundi Pioneer with respect to the Fund as a direct result of the Transaction. They discussed incentive arrangements for key personnel that would continue after the closing of the Transaction and their plans to establish a new long-term incentive plan following the closing. They also generally discussed ways in which Amundi Pioneer could potentially draw on the expanded global resources of Amundi post-Transaction. At those meetings, the Independent Trustees identified certain areas to which they requested further information, including as to trading and execution of securities transactions, research and portfolio management and potential changes in investment process, particularly where asset classes managed by Amundi Pioneer would overlap with asset classes managed by Amundi, the continued availability of resources currently at Pioneer Investments or elsewhere within Amundi to assist in management of certain Funds, and any anticipated significant changes in operations. The Independent Trustees considered the uncertainty as to whether the Fund's independent registered public accounting firm could continue to act in that capacity after the closing of the Transaction. The Independent Trustees also met with counsel to review the information they had received to date and to discuss next steps. Pioneer U.S. Corporate High Yield Fund | Annual Report | 8/31/17 47 Subsequently, the Trustees received further information from Amundi, including written responses to questions raised by the Independent Trustees, and received from Amundi Pioneer the information requested of it. The Independent Trustees reviewed the information provided with counsel at telephonic meetings held on February 16, 2017 and February 27, 2017. The Trustees held a special in-person Board meeting on March 6-7, 2017 for further consideration of the New Management Agreements, the Interim Management Agreements and the Transaction. The Trustees met again with senior executives of Amundi at the March 6-7, 2017 meeting. At the March 6-7, 2017 meeting, based on their evaluation of the information provided by Amundi Pioneer and Amundi, the Trustees including the Independent Trustees voting separately, approved the New Management Agreement and the Interim Management Agreement for the Fund. In considering the New Management Agreement for the Fund, the Trustees considered various factors that they determined were relevant, including the factors described below. The Trustees did not identify any single factor as the controlling factor in their determinations. The Trustees considered the same factors with respect to the Interim Management Agreement for the Fund. Nature, Extent and Quality of Services The Trustees considered the nature, extent and quality of the services that had been provided by Amundi Pioneer to the Fund and that are expected to be provided by Amundi Pioneer to the Fund following the consummation of the Transaction. The Trustees reviewed the terms of the New Management Agreement, and noted that such terms are substantially similar to the terms of the Current Management Agreement, except for different execution dates, effective dates and termination dates. The Trustees reviewed Amundi Pioneer's investment approach for the Fund and its research process. The Trustees considered the resources of Amundi Pioneer and the personnel of Amundi Pioneer who provide investment management services to the Fund. They also reviewed the amount of non-investment resources and personnel of Amundi Pioneer that are involved in Amundi Pioneer's services to the Fund, including Amundi Pioneer's compliance and legal resources and personnel. The Trustees noted the substantial attention and high priority given by Amundi Pioneer's senior management to the Pioneer Fund complex. The Trustees considered that Amundi Pioneer supervises and monitors the performance of the Fund's service providers and provides the Fund with personnel (including Fund officers) and other resources that are necessary for the Fund's business management and operations and that Amundi Pioneer would continue to provide those investment management and research services and resources to the Fund following the consummation of the Transaction. The Trustees also considered that, as administrator, Amundi 48 Pioneer U.S. Corporate High Yield Fund | Annual Report | 8/31/17 Pioneer would continue to be responsible for the administration of the Fund's business and other affairs. The Trustees considered the fees to be paid to Amundi Pioneer for the provision of administration services. The Trustees considered that Deloitte & Touche LLP informed the Board that it would no longer be independent with respect to the Fund upon the completion of the Transaction and, accordingly, that it would be necessary for the Board to engage a new independent registered public accounting firm for the Fund. The Trustees considered that the Transaction was not expected to have a material adverse impact on the nature, scope and overall quality of services provided to the Fund and its shareholders, including investment management, risk management, administrative, compliance, legal and other services, as a result of the Transaction. In that regard, the Trustees considered that Amundi is one of the largest asset managers globally, and that Amundi Pioneer may have access to additional research and portfolio management capabilities as a result of the Transaction and that Amundi Pioneer, as part of Amundi, is expected to have an enhanced global presence that may contribute to an increase in the overall scale and resources of Amundi Pioneer. Furthermore, in considering whether the Transaction would be expected to have a material adverse impact on the nature, scope and overall quality of services provided to the Fund and its shareholders, the Trustees considered the statements by representatives of Amundi that they expect the Chief Executive Officer and Chief Investment Officer of Amundi Pioneer to remain in their current positions and that they do not currently foresee major changes in the day-to-day investment management operations of Amundi Pioneer as a direct result of the Transaction, or the risk management, legal or compliance services provided by Amundi Pioneer, with respect to the Fund. They further considered the current incentive arrangements for key personnel of Amundi Pioneer that would continue after the closing of the Transaction. They also noted Amundi's stated intention to establish a new long-term incentive plan following the closing. The Trustees also took into account their experience in evaluating the proposed combination of Pioneer Investments and Santander Asset Management, which was announced in September, 2014 and abandoned in July, 2016. In light of, among other things, this experience, the Trustees determined that they were not able to identify any realistic alternatives to approving the New Management Agreement that would provide the level of services to the Fund and its shareholders that are expected to be provided by Amundi Pioneer after the closing of the Transaction. Pioneer U.S. Corporate High Yield Fund | Annual Report | 8/31/17 49 Based on these considerations, the Trustees concluded that the nature, extent and quality of services that Amundi Pioneer would continue to provide to the Fund under the New Management Agreement would be satisfactory and consistent with the terms of the New Management Agreement. Performance of the Fund In considering the Fund's performance, the Trustees regularly reviewed and discussed throughout the year data prepared by Amundi Pioneer and information comparing the Fund's performance with the performance of its peer group of funds, as classified by each of Morningstar, Inc. (Morningstar) and Lipper, and the performance of the Fund's benchmark index. They also discussed the Fund's performance with Amundi Pioneer on a regular basis. The Trustees' regular reviews and discussions were factored into the Trustees' deliberations concerning the approval of the New Management Agreement. Management Fee and Expenses The Trustees noted that the stated management fees to be paid by the Fund are identical under the Current Management Agreement and the New Management Agreement. The Trustees considered information showing the fees and expenses of the Fund in comparison to the management fees and expense ratios of its peer group of funds as classified by Morningstar and also to the expense ratios of a peer group of funds selected on the basis of criteria determined by the Independent Trustees for this purpose using data provided by Strategic Insight Mutual Fund Research and Consulting, LLC (Strategic Insight), an independent third party. In all quintile rankings referred to below, first quintile is most favorable to the Fund's shareowners. To the extent applicable, the Trustees also considered the impact of transfer agency, sub-transfer agency, and other non-management fee expenses on the expense ratios of the Fund. The Trustees noted that they separately review the Fund's transfer agency, sub-transfer agency and intermediary arrangements and that the results of the most recent such review were considered in the consideration of the Fund's expense ratio. The Trustees noted that comparative information as of September 30, 2016 was not available for this Fund as the Fund commenced operations on January 1, 2017. In initially approving the Fund's management fee, the Trustees considered that the Fund's management fee would fall approximately in the third quintile relative to the management fees paid by funds in the Morningstar High Yield category. The Trustees noted that Amundi Pioneer had agreed to waive fees and/or reimburse expenses in order to limit the ordinary operating expenses of the Fund. The Trustees considered that, taking into account proposed contractual expense limitation arrangements, the expense ratio for the Fund's Class A shares would fall approximately in the 50 Pioneer U.S. Corporate High Yield Fund | Annual Report | 8/31/17 third quintile relative to funds in the Morningstar High Yield category. The Trustees considered that, taking into account proposed contractual expense limitation arrangements, the expense ratio for the Fund's Class Y shares would fall approximately in the third quintile relative to funds in the Morningstar High Yield category. The Trustees reviewed management fees charged by Amundi Pioneer and Amundi Pioneer Institutional to institutional and other clients, including publicly offered European funds sponsored by Amundi Pioneer's affiliates, unaffiliated U.S. registered investment companies (in a sub-advisory capacity), and unaffiliated foreign and domestic separate accounts. The Trustees also considered Amundi Pioneer's costs in providing services to the Fund and Amundi Pioneer's and Amundi Pioneer Institutional's costs in providing services to the other clients and considered the differences in management fees and profit margins for fund and non-fund services. In evaluating the fees associated with Amundi Pioneer's and Amundi Pioneer Institutional's client accounts, the Trustees took into account the respective demands, resources and complexity associated with the Fund and other client accounts. The Trustees noted that in some instances the fee rates for those clients were lower than the management fee for the Fund and considered that, under both the Current Management Agreement and the New Management Agreement, Amundi Pioneer would perform additional services for the Fund that it does not provide to those other clients or services that are broader in scope, including oversight of the Fund's other service providers and activities related to compliance and the extensive regulatory and tax regimes to which the Fund is subject. The Trustees also considered the different risks associated with Amundi Pioneer's management of the Fund and Amundi Pioneer's and Amundi Pioneer Institutional's management of the other client accounts. The Trustees concluded that the management fee payable by the Fund to Amundi Pioneer was reasonable in relation to the nature and quality of the services to be provided by Amundi Pioneer. Profitability The Trustees considered information provided by Amundi Pioneer regarding the profitability of Amundi Pioneer with respect to the advisory services provided by Amundi Pioneer to the Fund, including the methodology used by Amundi Pioneer in allocating certain of its costs to the management of the Fund. The Trustees also considered Amundi Pioneer's profit margin in connection with the overall operation of the Fund. They further reviewed the financial results, including the profit margins, realized by Amundi Pioneer and Amundi Pioneer Institutional from non-fund businesses. The Trustees considered Amundi Pioneer's profit margins with respect to the Fund in comparison to the limited industry data available and noted that the Pioneer U.S. Corporate High Yield Fund | Annual Report | 8/31/17 51 profitability of any adviser was affected by numerous factors, including its organizational structure and method for allocating expenses. The Trustees concluded that Amundi Pioneer's profitability with respect to the management of the Fund was not unreasonable. Economies of Scale The Trustees considered Amundi Pioneer's views relating to economies of scale in connection with the Pioneer Funds as fund assets grow and the extent to which any such economies of scale are shared with the Fund and Fund shareholders. The Trustees recognize that economies of scale are difficult to identify and quantify, and that, among other factors that may be relevant, are the following: fee levels, expense subsidization, investment by Amundi Pioneer in research and analytical capabilities and Amundi Pioneer's commitment and resource allocation to the Fund. The Trustees noted that profitability also may be an indicator of the availability of any economies of scale, although profitability may vary for other reasons including due to reductions in expenses. The Trustees concluded that economies of scale, if any, were being appropriately shared with the Fund. Other Benefits The Trustees considered the other benefits that Amundi Pioneer enjoys from its relationship with the Fund. The Trustees considered the character and amount of fees paid or to be paid by the Fund, other than under the Current Management Agreement or the New Management Agreement, for services provided by Amundi Pioneer and its affiliates. The Trustees further considered the revenues and profitability of Amundi Pioneer's businesses other than the Fund business. To the extent applicable, the Trustees also considered the benefits to the Fund and to Amundi Pioneer and its affiliates from the use of "soft" commission dollars generated by the Fund to pay for research and brokerage services. The Trustees considered that following the completion of the Transaction, Amundi Pioneer will be the principal U.S. asset management business of Amundi, and that Amundi's worldwide asset management business will manage over $1.38 trillion in assets (including the Pioneer Funds). This may create opportunities for Amundi Pioneer, Amundi Pioneer Institutional and Amundi that derive from Amundi Pioneer's relationships with the Fund, including Amundi's ability to market the services of Amundi Pioneer globally. The Trustees noted that Amundi Pioneer may have access to additional research capabilities as a result of the Transaction and Amundi's enhanced global presence that may contribute to an increase of the overall scale of Amundi Pioneer. The Trustees considered that Amundi Pioneer and the Fund are expected to receive reciprocal intangible benefits from the relationship, including mutual brand recognition and, for the Fund, direct and indirect 52 Pioneer U.S. Corporate High Yield Fund | Annual Report | 8/31/17 access to the resources of a large global asset manager. The Trustees concluded that any such benefits received by Amundi Pioneer as a result of its relationship with the Fund were reasonable. Conclusion After consideration of the factors described above as well as other factors, the Trustees, including the Independent Trustees, concluded that the New Management Agreement and the Interim Management Agreement for the Fund, including the fees payable thereunder, were fair and reasonable and voted to approve the New Management Agreement and the Interim Management Agreement, and to recommend that shareholders approve the New Management Agreement. Pioneer U.S. Corporate High Yield Fund | Annual Report | 8/31/17 53 Trustees, Officers and Service Providers Investment Adviser Amundi Pioneer Asset Management, Inc. Custodian and Sub-Administrator Brown Brothers Harriman & Co. Independent Registered Public Accounting Firm Ernst & Young LLP Principal Underwriter Amundi Pioneer Distributor, Inc. Legal Counsel Morgan, Lewis & Bockius LLP Shareowner Services and Transfer Agent Boston Financial Data Services, Inc. Proxy Voting Policies and Procedures of the Fund are available without charge, upon request, by calling our toll free number (1-800-225-6292). Information regarding how the Fund voted proxies relating to portfolio securities during the most recent 12-month period ended June 30 is publicly available to shareowners at www.amundipioneer.com. This information is also available on the Securities and Exchange Commission's web site at www.sec.gov. Trustees and Officers The Fund's Trustees and officers are listed below, together with their principal occupations and other directorships they have held during at least the past five years. Trustees who are interested persons of the Fund within the meaning of the 1940 Act are referred to as Interested Trustees. Trustees who are not interested persons of the Fund are referred to as Independent Trustees. Each of the Trustees serves as a Trustee of each of the 46 U.S. registered investment portfolios for which Amundi Pioneer serves as investment adviser (the "Pioneer Funds"). The address for all Trustees and all officers of the Fund is 60 State Street, Boston, Massachusetts 02109. The Statement of Additional Information of the Fund includes additional information about the Trustees and is available, without charge, upon request, by calling 1-800-225-6292. 54 Pioneer U.S. Corporate High Yield Fund | Annual Report | 8/31/17 Independent Trustees ------------------------------------------------------------------------------------------------------------------------------------ Name, Age and Position Term of Office and Other Directorships Held With the Fund Length of Service Principal Occupation Held by Trustee ------------------------------------------------------------------------------------------------------------------------------------ Thomas J. Perna (66) Trustee since 2016. Private investor (2004 - 2008 and 2013 - Director, Broadridge Financial Chairman of the Board Serves until a present); Chairman (2008 - 2013) and Chief Solutions, Inc. (investor and Trustee successor trustee is Executive Officer (2008 - 2012), Quadriserv, communications and securities elected or earlier Inc. (technology products for securities processing provider for financial retirement or removal. lending industry); and Senior Executive Vice services industry) (2009 - President, The Bank of New York (financial and present); Director, Quadriserv, securities services) (1986 - 2004) Inc. (2005 - 2013); and Commissioner, New Jersey State Civil Service Commission (2011 - 2015) ------------------------------------------------------------------------------------------------------------------------------------ David R. Bock (73) Trustee since 2016. Managing Partner, Federal City Capital Advisors Director of New York Mortgage Trustee Serves until a (corporate advisory services company) (1997 - Trust (publicly-traded mortgage successor trustee is 2004 and 2008 - present); Interim Chief REIT) (2004 - 2009, 2012 - elected or earlier Executive Officer, Oxford Analytica, Inc. present); Director of The Swiss retirement or removal. (privately held research and consulting Helvetia Fund, Inc. (closed-end company) (2010); Executive Vice President and fund) (2010 - present); Director Chief Financial Officer, I-trax, Inc. (publicly of Oxford Analytica, Inc. (2008 - traded health care services company) (2004 - present); and Director of 2007); and Executive Vice President and Chief Enterprise Community Investment, Financial Officer, Pedestal Inc. Inc. (privately-held affordable (internet-based mortgage trading company) (2000 housing finance company) (1985 - - 2002); Private Consultant (1995 - 1997); 2010) Managing Director, Lehman Brothers (1992 - 1995); Executive, The World Bank (1979 - 1992) ------------------------------------------------------------------------------------------------------------------------------------ Benjamin M. Friedman (73) Trustee since 2016. William Joseph Maier Professor of Political Trustee, Mellon Institutional Trustee Serves until a Economy, Harvard University (1972 - present) Funds Investment Trust and Mellon successor trustee is Institutional Funds Master elected or earlier Portfolio (oversaw 17 portfolios retirement or removal. in fund complex) (1989 - 2008) ------------------------------------------------------------------------------------------------------------------------------------ Margaret B.W. Graham (70) Trustee since 2016. Founding Director, Vice-President and Corporate None Trustee Serves until a Secretary, The Winthrop Group, Inc. (consulting successor trustee is firm) (1982 - present); Desautels Faculty of elected or earlier Management, McGill University (1999 - present); retirement or removal. and Manager of Research Operations and Organizational Learning, Xerox PARC, Xerox's advance research center (1990-1994) ------------------------------------------------------------------------------------------------------------------------------------ Pioneer U.S. Corporate High Yield Fund | Annual Report | 8/31/17 55 Independent Trustees (continued) ------------------------------------------------------------------------------------------------------------------------------------ Name, Age and Position Term of Office and Other Directorships Held With the Fund Length of Service Principal Occupation Held by Trustee ------------------------------------------------------------------------------------------------------------------------------------ Lorraine H. Monchak (61) Trustee since 2017. Chief Investment Officer, 1199 SEIU Funds None Trustee (Advisory Trustee from (healthcare workers union pension funds) (2001 2014 - 2017). Serves - present); Vice President - International until a successor Investments Group, American International trustee is elected or Group, Inc. (insurance company) (1993 - 2001); earlier retirement or Vice President, Corporate Finance and Treasury removal. Group, Citibank, N.A. (1980 - 1986 and 1990 - 1993); Vice President - Asset/Liability Management Group, Federal Farm Funding Corporation (government-sponsored issuer of debt securities) (1988 - 1990); Mortgage Strategies Group, Shearson Lehman Hutton, Inc. (investment bank) (1987 - 1988); Mortgage Strategies Group, Drexel Burnham Lambert, Ltd. (investment bank) (1986 - 1987) ------------------------------------------------------------------------------------------------------------------------------------ Marguerite A. Piret (69) Trustee since 2016. President and Chief Executive Officer, Newbury Director of New America High Trustee Serves until a Piret Company (investment banking firm) (1981 - Income Fund, Inc. (closed-end successor trustee is present) investment company) (2004 - elected or earlier present); and Member, Board of retirement or removal. Governors, Investment Company Institute (2000 - 2006) ------------------------------------------------------------------------------------------------------------------------------------ Fred J. Ricciardi (70) Trustee since 2014. Consultant (investment company services) (2012 None Trustee Serves until a - present); Executive Vice President, BNY successor trustee is Mellon (financial and investment company elected or earlier services) (1969 - 2012); Director, BNY retirement or removal. International Financing Corp. (financial services) (2002 - 2012); Director, Mellon Overseas Investment Corp. (financial services) (2009 - 2012) ------------------------------------------------------------------------------------------------------------------------------------ 56 Pioneer U.S. Corporate High Yield Fund | Annual Report | 8/31/17 Interested Trustees ------------------------------------------------------------------------------------------------------------------------------------ Name, Age and Position Term of Office and Other Directorships Held With the Fund Length of Service Principal Occupation Held by Trustee ------------------------------------------------------------------------------------------------------------------------------------ Lisa M. Jones (55)* Trustee since 2017. Chair, Director, CEO and President of Amundi None Trustee, President and Serves until a Pioneer Asset Management USA, Inc. (since Chief Executive Officer successor trustee is September 2014); Chair, Director and CEO of elected or earlier Amundi Pioneer Asset Management, Inc. (since retirement or removal September 2014); Chair, Director and CEO of Amundi Pioneer Distributor, Inc. (since September 2014); Chair, Director, CEO and President of Amundi Pioneer Institutional Asset Management, Inc. (since September 2014); Managing Director, Morgan Stanley Investment Management (2010 - 2013); Director of Institutional Business, CEO of International, Eaton Vance Management (2005 - 2010) ------------------------------------------------------------------------------------------------------------------------------------ Kenneth J. Taubes (59)* Trustee since 2014. Director and Executive Vice President (since None Trustee Serves until a 2008) and Chief Investment Officer, U.S. (since successor trustee is 2010) of Amundi Pioneer Asset Management USA, elected or earlier Inc.; Executive Vice President and Chief retirement or removal Investment Officer, U.S. of Amundi Pioneer (since 2008); Executive Vice President of Amundi Pioneer Institutional Asset Management, Inc. (since 2009); Portfolio Manager of Amundi Pioneer (since 1999) ------------------------------------------------------------------------------------------------------------------------------------ Pioneer U.S. Corporate High Yield Fund | Annual Report | 8/31/17 57 Fund Officers ------------------------------------------------------------------------------------------------------------------------------------ Name, Age and Position Term of Office and Other Directorships Held With the Fund Length of Service Principal Occupation Held by Trustee ------------------------------------------------------------------------------------------------------------------------------------ Christopher J. Kelley Since 2016. Serves at Vice President and Associate General Counsel of None (52) the discretion of the Amundi Pioneer since January 2008; Secretary Secretary and Board and Chief Legal Officer of all of the Pioneer Chief Legal Officer Funds since June 2010; Assistant Secretary of all of the Pioneer Funds from September 2003 to May 2010; Vice President and Senior Counsel of Amundi Pioneer from July 2002 to December 2007 ------------------------------------------------------------------------------------------------------------------------------------ Carol B. Hannigan (56) Since 2016. Serves at Fund Governance Director of Amundi Pioneer None Assistant Secretary the discretion of the since December 2006 and Assistant Secretary of Board all the Pioneer Funds since June 2010; Manager - Fund Governance of Amundi Pioneer from December 2003 to November 2006; and Senior Paralegal of Amundi Pioneer from January 2000 to November 2003 ------------------------------------------------------------------------------------------------------------------------------------ Thomas Reyes (54) Since 2016. Serves at Senior Counsel of Amundi Pioneer since May 2013 None Assistant Secretary the discretion of the and Assistant Secretary of all the Pioneer Board Funds since June 2010; Counsel of Amundi Pioneer from June 2007 to May 2013 ------------------------------------------------------------------------------------------------------------------------------------ Mark E. Bradley (57) Since 2016. Serves at Vice President - Fund Treasury of Amundi None Treasurer and the discretion of the Pioneer; Treasurer of all of the Pioneer Funds Chief Financial and Board since March 2008; Deputy Treasurer of Amundi Accounting Officer Pioneer from March 2004 to February 2008; and Assistant Treasurer of all of the Pioneer Funds from March 2004 to February 2008 ------------------------------------------------------------------------------------------------------------------------------------ Luis I. Presutti (52) Since 2016. Serves at Director - Fund Treasury of Amundi Pioneer; and None Assistant Treasurer the discretion of the Assistant Treasurer of all of the Pioneer Funds Board ------------------------------------------------------------------------------------------------------------------------------------ Gary Sullivan (59) Since 2016. Serves at Fund Accounting Manager - Fund Treasury of None Assistant Treasurer the discretion of the Amundi Pioneer; and Assistant Treasurer of all Board of the Pioneer Funds ------------------------------------------------------------------------------------------------------------------------------------ David F. Johnson (37) Since 2016. Serves at Fund Administration Manager - Fund Treasury of None Assistant Treasurer the discretion of the Amundi Pioneer since November 2008; Assistant Board Treasurer of all of the Pioneer Funds since January 2009; Client Service Manager - Institutional Investor Services at State Street Bank from March 2003 to March 2007 ------------------------------------------------------------------------------------------------------------------------------------ 58 Pioneer U.S. Corporate High Yield Fund | Annual Report | 8/31/17 ------------------------------------------------------------------------------------------------------------------------------------ Name, Age and Position Term of Office and Other Directorships Held With the Fund Length of Service Principal Occupation Held by Trustee ------------------------------------------------------------------------------------------------------------------------------------ Jean M. Bradley (64) Since 2016. Serves at Chief Compliance Officer of Amundi Pioneer and None Chief Compliance Officer the discretion of the of all the Pioneer Funds since March 2010; Board Chief Compliance Officer of Amundi Pioneer Institutional Asset Management, Inc. since January 2012; Chief Compliance Officer of Vanderbilt Capital Advisors, LLC since July 2012: Director of Adviser and Portfolio Compliance at Amundi Pioneer since October 2005; Senior Compliance Officer for Columbia Management Advisers, Inc. from October 2003 to October 2005 ------------------------------------------------------------------------------------------------------------------------------------ Kelly O'Donnell (46) Since 2016. Serves at Director - Transfer Agency Compliance of Amundi None Anti-Money the discretion of the Pioneer and Anti-Money Laundering Officer of Laundering Officer Board all the Pioneer Funds since 2006 ------------------------------------------------------------------------------------------------------------------------------------ * Ms. Jones and Mr. Taubes are Interested Trustees because they are officers or directors of the fund's investment adviser and certain of its affiliates. Pioneer U.S. Corporate High Yield Fund | Annual Report | 8/31/17 59 This page is for your notes. 60 Pioneer U.S. Corporate High Yield Fund | Annual Report | 8/31/17 How to Contact Amundi Pioneer We are pleased to offer a variety of convenient ways for you to contact us for assistance or information. Call us for: -------------------------------------------------------------------------------- Account Information, including existing accounts, new accounts, prospectuses, applications and service forms 1-800-225-6292 FactFone(SM) for automated fund yields, prices, account information and transactions 1-800-225-4321 Retirement plans information 1-800-622-0176 Write to us: -------------------------------------------------------------------------------- Amundi Pioneer P.O. Box 55014 Boston, Massachusetts 02205-5014 Our toll-free fax 1-800-225-4240 Our internet e-mail address ask.amundipioneer@amundipioneer.com (for general questions about Amundi Pioneer only) Visit our web site: www.amundipioneer.com This report must be preceded or accompanied by a prospectus. The Fund files a complete schedule of investments with the Securities and Exchange Commission for the first and third quarters for each fiscal year on Form N-Q. Shareholders may view the filed Form N-Q by visiting the Commission's web site at http://www.sec.gov. The filed form may also be viewed and copied at the Commission's Public Reference Room in Washington, DC. Information regarding the operations of the Public Reference Room may be obtained by calling 1-800-SEC-0330. [LOGO] Amundi Pioneer ============== ASSET MANAGEMENT Amundi Pioneer Asset Management, Inc. 60 State Street Boston, MA 02109 www.amundipioneer.com Securities offered through Amundi Pioneer Distributor, Inc. 60 State Street, Boston, MA 02109 Underwriter of Pioneer Mutual Funds, Member SIPC (C) 2017 Amundi Pioneer Asset Management 30494-00-1017 ITEM 2. CODE OF ETHICS. (a) Disclose whether, as of the end of the period covered by the report, the registrant has adopted a code of ethics that applies to the registrant's principal executive officer, principal financial officer, principal accounting officer or controller, or persons performing similar functions, regardless of whether these individuals are employed by the registrant or a third party. If the registrant has not adopted such a code of ethics, explain why it has not done so. The registrant has adopted, as of the end of the period covered by this report, a code of ethics that applies to the registrant's principal executive officer, principal financial officer, principal accounting officer and controller. (b) For purposes of this Item, the term "code of ethics" means written standards that are reasonably designed to deter wrongdoing and to promote: (1) Honest and ethical conduct, including the ethical handling of actual or apparent conflicts of interest between personal and professional relationships; (2) Full, fair, accurate, timely, and understandable disclosure in reports and documents that a registrant files with, or submits to, the Commission and in other public communications made by the registrant; (3) Compliance with applicable governmental laws, rules, and regulations; (4) The prompt internal reporting of violations of the code to an appropriate person or persons identified in the code; and (5) Accountability for adherence to the code. (c) The registrant must briefly describe the nature of any amendment, during the period covered by the report, to a provision of its code of ethics that applies to the registrant's principal executive officer, principal financial officer, principal accounting officer or controller, or persons performing similar functions, regardless of whether these individuals are employed by the registrant or a third party, and that relates to any element of the code of ethics definition enumerated in paragraph (b) of this Item. The registrant must file a copy of any such amendment as an exhibit pursuant to Item 10(a), unless the registrant has elected to satisfy paragraph (f) of this Item by posting its code of ethics on its website pursuant to paragraph (f)(2) of this Item, or by undertaking to provide its code of ethics to any person without charge, upon request, pursuant to paragraph (f)(3) of this Item. The registrant has made no amendments to the code of ethics during the period covered by this report. (d) If the registrant has, during the period covered by the report, granted a waiver, including an implicit waiver, from a provision of the code of ethics to the registrant's principal executive officer, principal financial officer, principal accounting officer or controller, or persons performing similar functions, regardless of whether these individuals are employed by the registrant or a third party, that relates to one or more of the items set forth in paragraph (b) of this Item, the registrant must briefly describe the nature of the waiver, the name of the person to whom the waiver was granted, and the date of the waiver. Not applicable. (e) If the registrant intends to satisfy the disclosure requirement under paragraph (c) or (d) of this Item regarding an amendment to, or a waiver from, a provision of its code of ethics that applies to the registrant's principal executive officer, principal financial officer, principal accounting officer or controller, or persons performing similar functions and that relates to any element of the code of ethics definition enumerated in paragraph (b) of this Item by posting such information on its Internet website, disclose the registrant's Internet address and such intention. Not applicable. (f) The registrant must: (1) File with the Commission, pursuant to Item 12(a)(1), a copy of its code of ethics that applies to the registrant's principal executive officer,principal financial officer, principal accounting officer or controller, or persons performing similar functions, as an exhibit to its annual report on this Form N-CSR (see attachment); (2) Post the text of such code of ethics on its Internet website and disclose, in its most recent report on this Form N-CSR, its Internet address and the fact that it has posted such code of ethics on its Internet website; or (3) Undertake in its most recent report on this Form N-CSR to provide to any person without charge, upon request, a copy of such code of ethics and explain the manner in which such request may be made. 	See Item 10(2) ITEM 3. AUDIT COMMITTEE FINANCIAL EXPERT. (a) (1) Disclose that the registrant's board of trustees has determined that the registrant either: (i) Has at least one audit committee financial expert serving on its audit committee; or (ii) Does not have an audit committee financial expert serving on its audit committee. The registrant's Board of Trustees has determined that the registrant has at least one audit committee financial expert. (2) If the registrant provides the disclosure required by paragraph (a)(1)(i) of this Item, it must disclose the name of the audit committee financial expert and whether that person is "independent." In order to be considered "independent" for purposes of this Item, a member of an audit committee may not, other than in his or her capacity as a member of the audit committee, the board of trustees, or any other board committee: (i) Accept directly or indirectly any consulting, advisory, or other compensatory fee from the issuer; or (ii) Be an "interested person" of the investment company as defined in Section 2(a)(19) of the Act (15 U.S.C. 80a-2(a)(19)). Ms. Marguerite A. Piret, an independent trustee, is such an audit committee financial expert. (3) If the registrant provides the disclosure required by paragraph (a)(1) (ii) of this Item, it must explain why it does not have an audit committee financial expert. Not applicable. ITEM 4. PRINCIPAL ACCOUNTANT FEES AND SERVICES. (a) Disclose, under the caption AUDIT FEES, the aggregate fees billed for each of the last two fiscal years for professional services rendered by the principal accountant for the audit of the registrant's annual financial statements or services that are normally provided by the accountant in connection with statutory and regulatory filings or engagements for those fiscal years. The audit fees for the Trust were $96,000 payable to Ernst & Young LLP for the year ended August 31, 2017 and $73,121 payable to Deloitte & Touche LLP for the year ended August 31, 2016. (b) Disclose, under the caption AUDIT-RELATED FEES, the aggregate fees billed in each of the last two fiscal years for assurance and related services by the principal accountant that are reasonably related to the performance of the audit of the registrant's financial statements and are not reported under paragraph (a) of this Item. Registrants shall describe the nature of the services comprising the fees disclosed under this category. There were no audit-related services in 2017 or 2016. (c) Disclose, under the caption TAX FEES, the aggregate fees billed in each of the last two fiscal years for professional services rendered by the principal accountant for tax compliance, tax advice, and tax planning. Registrants shall describe the nature of the services comprising the fees disclosed under this category. The tax fees for the Trust were $26,171 payable to Ernst & Young LLP for the year ended August 31, 2017 and $15,906 payable to Deloitte & Touche LLP for the year ended August 31, 2016. (d) Disclose, under the caption ALL OTHER FEES, the aggregate fees billed in each of the last two fiscal years for products and services provided by the principal accountant, other than the services reported in paragraphs (a) through (c) of this Item. Registrants shall describe the nature of the services comprising the fees disclosed under this category. There were no other fees in 2017 or 2016. (e) (1) Disclose the audit committee's pre-approval policies and procedures described in paragraph (c)(7) of Rule 2-01 of Regulation S-X. PIONEER FUNDS APPROVAL OF AUDIT, AUDIT-RELATED, TAX AND OTHER SERVICES PROVIDED BY THE INDEPENDENT AUDITOR SECTION I - POLICY PURPOSE AND APPLICABILITY The Pioneer Funds recognize the importance of maintaining the independence of their outside auditors. Maintaining independence is a shared responsibility involving Pioneer Investment Management, Inc ("PIM"), the audit committee and the independent auditors. The Funds recognize that a Fund's independent auditors: 1) possess knowledge of the Funds, 2) are able to incorporate certain services into the scope of the audit, thereby avoiding redundant work, cost and disruption of Fund personnel and processes, and 3) have expertise that has value to the Funds. As a result, there are situations where it is desirable to use the Fund's independent auditors for services in addition to the annual audit and where the potential for conflicts of interests are minimal. Consequently, this policy, which is intended to comply with Rule 210.2-01(C)(7), sets forth guidelines and procedures to be followed by the Funds when retaining the independent audit firm to perform audit, audit-related tax and other services under those circumstances, while also maintaining independence. Approval of a service in accordance with this policy for a Fund shall also constitute approval for any other Fund whose pre-approval is required pursuant to Rule 210.2-01(c)(7)(ii). In addition to the procedures set forth in this policy, any non-audit services that may be provided consistently with Rule 210.2-01 may be approved by the Audit Committee itself and any pre-approval that may be waived in accordance with Rule 210.2-01(c)(7)(i)(C) is hereby waived. Selection of a Fund's independent auditors and their compensation shall be determined by the Audit Committee and shall not be subject to this policy. SECTION II - POLICY ---------------- -------------------------------- ------------------------------------------------- SERVICE SERVICE CATEGORY DESCRIPTION SPECIFIC PRE-APPROVED SERVICE SUBCATEGORIES CATEGORY ---------------- -------------------------------- ------------------------------------------------- I. AUDIT Services that are directly o Accounting research assistance SERVICES related to performing the o SEC consultation, registration independent audit of the Funds statements, and reporting o Tax accrual related matters o Implementation of new accounting standards o Compliance letters (e.g. rating agency letters) o Regulatory reviews and assistance regarding financial matters o Semi-annual reviews (if requested) o Comfort letters for closed end offerings ---------------- -------------------------------- ------------------------------------------------- II. Services which are not o AICPA attest and agreed-upon procedures AUDIT-RELATED prohibited under Rule o Technology control assessments SERVICES 210.2-01(C)(4) (the "Rule") o Financial reporting control assessments and are related extensions of o Enterprise security architecture the audit services support the assessment audit, or use the knowledge/expertise gained from the audit procedures as a foundation to complete the project. In most cases, if the Audit-Related Services are not performed by the Audit firm, the scope of the Audit Services would likely increase. The Services are typically well-defined and governed by accounting professional standards (AICPA, SEC, etc.) ---------------- -------------------------------- ------------------------------------------------- ------------------------------------- ------------------------------------ AUDIT COMMITTEE APPROVAL POLICY AUDIT COMMITTEE REPORTING POLICY ------------------------------------- ------------------------------------ o "One-time" pre-approval o A summary of all such for the audit period for all services and related fees pre-approved specific service reported at each regularly subcategories. Approval of the scheduled Audit Committee independent auditors as meeting. auditors for a Fund shall constitute pre approval for these services. ------------------------------------- ------------------------------------ o "One-time" pre-approval o A summary of all such for the fund fiscal year within services and related fees a specified dollar limit (including comparison to for all pre-approved specified dollar limits) specific service subcategories reported quarterly. o Specific approval is needed to exceed the pre-approved dollar limit for these services (see general Audit Committee approval policy below for details on obtaining specific approvals) o Specific approval is needed to use the Fund's auditors for Audit-Related Services not denoted as "pre-approved", or to add a specific service subcategory as "pre-approved" ------------------------------------- ------------------------------------ SECTION III - POLICY DETAIL, CONTINUED ----------------------- --------------------------- ----------------------------------------------- SERVICE CATEGORY SERVICE CATEGORY SPECIFIC PRE-APPROVED SERVICE SUBCATEGORIES DESCRIPTION ----------------------- --------------------------- ----------------------------------------------- III. TAX SERVICES Services which are not o Tax planning and support prohibited by the Rule, o Tax controversy assistance if an officer of the Fund o Tax compliance, tax returns, excise determines that using the tax returns and support Fund's auditor to provide o Tax opinions these services creates significant synergy in the form of efficiency, minimized disruption, or the ability to maintain a desired level of confidentiality. ----------------------- --------------------------- ----------------------------------------------- ------------------------------------- ------------------------- AUDIT COMMITTEE APPROVAL POLICY AUDIT COMMITTEE REPORTING POLICY ------------------------------------- ------------------------- ------------------------------------- ------------------------- o "One-time" pre-approval o A summary of for the fund fiscal year all such services and within a specified dollar limit related fees 				 (including comparison 			 to specified dollar 			 limits) reported 			 quarterly. o Specific approval is needed to exceed the pre-approved dollar limits for these services (see general Audit Committee approval policy below for details on obtaining specific approvals) o Specific approval is needed to use the Fund's auditors for tax services not denoted as pre-approved, or to add a specific service subcategory as "pre-approved" ------------------------------------- ------------------------- SECTION III - POLICY DETAIL, CONTINUED ----------------------- --------------------------- ----------------------------------------------- SERVICE CATEGORY SERVICE CATEGORY SPECIFIC PRE-APPROVED SERVICE SUBCATEGORIES DESCRIPTION ----------------------- --------------------------- ----------------------------------------------- IV. OTHER SERVICES Services which are not o Business Risk Management support prohibited by the Rule, o Other control and regulatory A. SYNERGISTIC, if an officer of the Fund compliance projects UNIQUE QUALIFICATIONS determines that using the Fund's auditor to provide these services creates significant synergy in the form of efficiency, minimized disruption, the ability to maintain a desired level of confidentiality, or where the Fund's auditors posses unique or superior qualifications to provide these services, resulting in superior value and results for the Fund. ----------------------- --------------------------- ----------------------------------------------- --------------------------------------- ------------------------ AUDIT COMMITTEE APPROVAL POLICY AUDIT COMMITTEE REPORTING POLICY ------------------------------------- -------------------------- o "One-time" pre-approval o A summary of for the fund fiscal year within all such services and a specified dollar limit related fees 			 (including comparison 			 to specified dollar 				 limits) reported quarterly. o Specific approval is needed to exceed the pre-approved dollar limits for these services (see general Audit Committee approval policy below for details on obtaining specific approvals) o Specific approval is needed to use the Fund's auditors for "Synergistic" or "Unique Qualifications" Other Services not denoted as pre-approved to the left, or to add a specific service subcategory as "pre-approved" ------------------------------------- -------------------------- SECTION III - POLICY DETAIL, CONTINUED ----------------------- ------------------------- ----------------------------------------------- SERVICE CATEGORY SERVICE CATEGORY SPECIFIC PROHIBITED SERVICE SUBCATEGORIES DESCRIPTION ----------------------- ------------------------- ----------------------------------------------- PROHIBITED SERVICES Services which result 1. Bookkeeping or other services in the auditors losing related to the accounting records or independence status financial statements of the audit under the Rule. client* 2. Financial information systems design and implementation* 3. Appraisal or valuation services, fairness* opinions, or contribution-in-kind reports 4. Actuarial services (i.e., setting actuarial reserves versus actuarial audit work)* 5. Internal audit outsourcing services* 6. Management functions or human resources 7. Broker or dealer, investment advisor, or investment banking services 8. Legal services and expert services unrelated to the audit 9. Any other service that the Public Company Accounting Oversight Board determines, by regulation, is impermissible ----------------------- ------------------------- ----------------------------------------------- ------------------------------------------- ------------------------------ AUDIT COMMITTEE APPROVAL POLICY AUDIT COMMITTEE REPORTING POLICY ------------------------------------------- ------------------------------ o These services are not to be o A summary of all performed with the exception of the(*) services and related services that may be permitted fees reported at each if they would not be subject to audit regularly scheduled procedures at the audit client (as Audit Committee meeting defined in rule 2-01(f)(4)) level will serve as continual the firm providing the service. confirmation that has 				 not provided any restricted services. ------------------------------------------- ------------------------------ -------------------------------------------------------------------------------- GENERAL AUDIT COMMITTEE APPROVAL POLICY: o For all projects, the officers of the Funds and the Fund's auditors will each make an assessment to determine that any proposed projects will not impair independence. o Potential services will be classified into the four non-restricted service categories and the "Approval of Audit, Audit-Related, Tax and Other Services" Policy above will be applied. Any services outside the specific pre-approved service subcategories set forth above must be specifically approved by the Audit Committee. o At least quarterly, the Audit Committee shall review a report summarizing the services by service category, including fees, provided by the Audit firm as set forth in the above policy. -------------------------------------------------------------------------------- (2) Disclose the percentage of services described in each of paragraphs (b) through (d) of this Item that were approved by the audit committee pursuant to paragraph (c)(7)(i)(C) of Rule 2-01 of Regulation S-X. Non-Audit Services Beginning with non-audit service contracts entered into on or after May 6, 2003, the effective date of the new SEC pre-approval rules, the Trust's audit committee is required to pre-approve services to affiliates defined by SEC rules to the extent that the services are determined to have a direct impact on the operations or financial reporting of the Trust. For the years ended August 31 2017 and 2016, there were no services provided to an affiliate that required the Trust's audit committee pre-approval. (f) If greater than 50 percent, disclose the percentage of hours expended on the principal accountants engagement to audit the registrant's financial statements for the most recent fiscal year that were attributed to work performed by persons other than the principal accountant's full-time, permanent employees. N/A (g) Disclose the aggregate non-audit fees billed by the registrants accountant for services rendered to the registrant, and rendered to the registrants investment adviser (not including any sub-adviser whose role is primarily portfolio management and is subcontracted with or overseen by another investment adviser), and any entity controlling, controlled by, or under common control with the adviser that provides ongoing services to the registrant for each of the last two fiscal years of the registrant. The aggregate non-audit fees for the Trust were $26,171 payable to Ernst & Young LLP for the year ended August 31, 2017 and $15,906 payable to Deloitte & Touche LLP for the year ended August 31, 2016. (h) Disclose whether the registrants audit committee of the board of trustees has considered whether the provision of non-audit services that were rendered to the registrants investment adviser (not including any subadviser whose role is primarily portfolio management and is subcontracted with or overseen by another investment adviser), and any entity controlling, controlled by, or under common control with the investment adviser that provides ongoing services to the registrant that were not pre-approved pursuant to paragraph (c)(7)(ii) of Rule 2-01 of Regulation S-X is compatible with maintaining the principal accountant's independence. The Fund's audit committee of the Board of Trustees has considered whether the provision of non-audit services that were rendered to the Affiliates (as defined) that were not pre- approved pursuant to paragraph (c)(7)(ii) of Rule 2-01 of Regulation S-X is compatible with maintaining the principal accountant's independence. ITEM 5. AUDIT COMMITTEE OF LISTED REGISTRANTS (a) If the registrant is a listed issuer as defined in Rule 10A-3 under the Exchange Act (17 CFR 240.10A-3), state whether or not the registrant has a separately-designated standing audit committee established in accordance with Section 3(a)(58)(A) of the Exchange Act (15 U.S.C. 78c(a)(58)(A)). If the registrant has such a committee, however designated, identify each committee member. If the entire board of directors is acting as the registrant's audit committee as specified in Section 3(a)(58)(B) of the Exchange Act (15 U.S.C. 78c(a)(58)(B)), so state. N/A (b) If applicable, provide the disclosure required by Rule 10A-3(d) under the Exchange Act (17 CFR 240.10A-3(d)) regarding an exemption from the listing standards for audit committees. N/A ITEM 6. SCHEDULE OF INVESTMENTS. File Schedule of Investments in securities of unaffiliated issuers as of the close of the reporting period as set forth in 210.1212 of Regulation S-X [17 CFR 210.12-12], unless the schedule is included as part of the report to shareholders filed under Item 1 of this Form. Included in Item 1 ITEM 7. DISCLOSURE OF PROXY VOTING POLICIES AND PROCEDURES FOR CLOSED-END MANAGEMENT INVESTMENT COMPANIES. A closed-end management investment company that is filing an annual report on this Form N-CSR must, unless it invests exclusively in non-voting securities, describe the policies and procedures that it uses to determine how to vote proxies relating to portfolio securities, including the procedures that the company uses when a vote presents a conflict between the interests of its shareholders, on the one hand, and those of the company's investment adviser; principal underwriter; or any affiliated person (as defined in Section 2(a)(3) of the Investment Company Act of 1940 (15 U.S.C. 80a-2(a)(3)) and the rules thereunder) of the company, its investment adviser, or its principal underwriter, on the other. Include any policies and procedures of the company's investment adviser, or any other third party, that the company uses, or that are used on the company's behalf, to determine how to vote proxies relating to portfolio securities. Not applicable to open-end management investment companies. ITEM 8. PORTFOLIO MANAGERS OF CLOSED-END MANAGEMENT INVESTMENT COMPANIES. (a) If the registrant is a closed-end management investment company that is filing an annual report on this Form N-CSR,provide the following information: (1) State the name, title, and length of service of the person or persons employed by or associated with the registrant or an investment adviser of the registrant who are primarily responsible for the day-to-day management of the registrant's portfolio ("Portfolio Manager"). Also state each Portfolio Manager's business experience during the past 5 years. Not applicable to open-end management investment companies. ITEM 9. PURCHASES OF EQUITY SECURITIES BY CLOSED-END MANAGEMENT INVESTMENT COMPANY AND AFFILIATED PURCHASERS. (a) If the registrant is a closed-end management investment company, in the following tabular format, provide the information specified in paragraph (b) of this Item with respect to any purchase made by or on behalf of the registrant or any affiliated purchaser, as defined in Rule 10b-18(a)(3) under the Exchange Act (17 CFR 240.10b-18(a)(3)), of shares or other units of any class of the registrant's equity securities that is registered by the registrant pursuant to Section 12 of the Exchange Act (15 U.S.C. 781). Not applicable to open-end management investment companies. ITEM 10. SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS. Describe any material changes to the procedures by which shareholders may recommend nominees to the registrant's board of directors, where those changes were implemented after the registrant last provided disclosure in response to the requirements of Item 407(c)(2)(iv) of Regulation S-R(17 CFR 229.407)(as required by Item 22(b)(15)) of Schedule 14A (17 CFR 240.14a-101), or this Item. There have been no material changes to the procedures by which the shareholders may recommend nominees to the registrant's board of directors since the registrant last provided disclosure in response to the requirements of Item 407(c)(2)(iv) of Regulation S-R of Schedule 14(A) in its definitive proxy statement, or this item. ITEM 11. CONTROLS AND PROCEDURES. (a) Disclose the conclusions of the registrant's principal executive and principal financials officers, or persons performing similar functions, regarding the effectiveness of the registrant's disclosure controls and procedures (as defined in Rule 30a-3(c) under the Act (17 CFR 270.30a-3(c))) as of a date within 90 days of the filing date of the report that includes the disclosure required by this paragraph, based on the evaluation of these controls and procedures required by Rule 30a-3(b) under the Act (17 CFR 270.30(a)-3(b) and Rules 13a-15(b) or 15d-15(b) under the Exchange Act (17 CFR 240.13a-15(b) or 240.15d-15(b)). The registrant's principal executive officer and principal financial officer have concluded that the registrant's disclosure controls and procedures are effective based on the evaluation of these controls and procedures as of a date within 90 days of the filing date of this report. (b) Disclose any change in the registrant's internal control over financial reporting (as defined in Rule 30a-3(d) under the Act (17CFR 270.30a-3(d)) that occured during the second fiscal quarter of the period covered by this report that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting. There were no significant changes in the registrant's internal control over financial reporting that occurred during the second fiscal quarter of the period covered by this report that have materially affected, or are reasonably likely to materially affect, the registrant's internal control over financial reporting. The registrant's principal executive officer and principal financial officer, however, voluntarily are reporting the following information: In August of 2006 the registrant's investment adviser enhanced its internal procedures for reporting performance information required to be included in prospectuses. Those enhancements involved additional internal controls over the appropriateness of performance data generated for this purpose. Such enhancements were made following an internal review which identified prospectuses relating to certain classes of shares of a limited number of registrants where, inadvertently, performance information not reflecting the deduction of applicable sales charges was included. Those prospectuses were revised, and the revised prospectuses were distributed to shareholders. ITEM 12. EXHIBITS. (a) File the exhibits listed below as part of this Form. Letter or number the exhibits in the sequence indicated. (1) Any code of ethics, or amendment thereto, that is the subject of the disclosure required by Item 2, to the extent that the registrant intends to satisfy the Item 2 requirements through filing of an exhibit. (2) A separate certification for each principal executive officer and principal financial officer of the registrant as required by Rule 30a-2(a) under the Act (17 CFR 270.30a-2(a)) , exactly as set forth below: Filed herewith. SIGNATURES [See General Instruction F] Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. Pioneer Series Trust V By (Signature and Title)* /s/ Lisa M. Jones Lisa M. Jones, President & Chief Executive Officer Date October 30, 2017 Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated. By (Signature and Title)* /s/ Lisa M. Jones Lisa M. Jones, President & Chief Executive Officer Date October 30, 2017 By (Signature and Title)* /s/ Mark E. Bradley Mark E. Bradley, Treasurer & Chief Accounting & Financial Officer Date October 30, 2017 * Print the name and title of each signing officer under his or her signature.