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 811-10395 Pioneer Series Trust VII (Exact name of registrant as specified in charter) 60 State Street, Boston, MA 02109 (Address of principal executive offices) (ZIP code) Terrence J. Cullen, Amundi Pioneer Asset 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: October 31 Date of reporting period: November 1, 2017 through April 30, 2018 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 Multisector Income Fund -------------------------------------------------------------------------------- Semiannual Report | April 30, 2018 -------------------------------------------------------------------------------- Ticker Symbols: Class A PGABX Class C PGCBX Class Y PGYBX [LOGO] Amundi Pioneer ============== ASSET MANAGEMENT visit us: www.amundipioneer.com Table of Contents President's Letter 2 Portfolio Management Discussion 4 Portfolio Summary 10 Prices and Distributions 11 Performance Update 12 Comparing Ongoing Fund Expenses 15 Schedule of Investments 17 Financial Statements 51 Notes to Financial Statements 58 Additional Information 77 Trustees, Officers and Service Providers 79 Pioneer Global Multisector Income Fund | Semiannual Report | 4/30/18 1 President's Letter While 2017 delivered strong positive performance, 2018, thus far, has introduced market volatility. Equity and fixed-income markets pulled back in the first quarter of this year, as the Standard & Poor's 500 Index and the Bloomberg Barclays U.S. Aggregate Bond Index both finished in negative territory, returning -0.76% and -1.46%, respectively, for the three-month period ended March 31, 2018. Concerns about the sustainability of the pace of economic growth, extended equity valuations, and rising interest rates drove a significant stock market sell-off beginning in late January, approaching correction levels. The market did recover from its initial slump, but this year's significant fluctuations have served to remind investors that even the strongest "bulls" cannot run forever. Within fixed income, rising interest rates helped drive down returns of most asset classes in the first quarter, though floating-rate sectors such as bank loans fared well in the rising-rate environment. Our view is that the first-quarter pause in the market's near-continuous upward momentum over the previous 15 months, dating back to the final quarter of 2016, presents an opportunity for investors to enter the market at healthier valuation levels. We believe fundamentals are still quite positive, yet also believe that caution is warranted given that the market remains vulnerable to corrections. Some areas, such as growth stocks, appear expensive, but we do see opportunity in value stocks, with prices supported by better corporate earnings due to the recent tax reforms in the U.S. as well as robust, nominal gross domestic product (GDP) growth. In fact, GDP growth in the U.S. rose to close to or better than 3% over the final three quarters of 2017, and GDP growth in the first quarter of 2018 registered at 2.3%. In the fixed-income markets, we believe investors should consider positioning their portfolios to defend against rising interest rates, with underweight positions in U.S. Treasuries. We see more attractive valuations within structured investment vehicles, such as mortgage-backed securities (MBS) in both the agency and non-agency residential MBS sectors, as fundamentals within the U.S. housing market remain positive. We believe that agency MBS, in particular, offer investors reasonable value. Since 1928, the foundation of Amundi Pioneer's investment approach has been active management, which is especially important during periods of market volatility. We believe investors can benefit from the experience and tenure of our investment teams who make active and informed decisions across our funds. In fact, the Pioneer Fund, the third-oldest mutual fund in the U.S., recently celebrated its 90th birthday. We believe the Fund serves as an important ambassador of our time-tested value style of investing and our early focus on understanding the potential benefits of investing in companies with 2 Pioneer Global Multisector Income Fund | Semiannual Report | 4/30/18 sustainable business models. Over its nine decades of existence - a time period that included a Great Depression, a devastating World War, a long Cold War, and enormous technological as well as societal changes - the Fund has been well-served by this investment approach. 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. /s/ Lisa M. Jones Lisa M. Jones Head of the Americas, President and CEO of U.S. Amundi Pioneer Asset Management USA, Inc. April 30, 2018 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 Multisector Income Fund | Semiannual Report | 4/30/18 3 Portfolio Management Discussion | 4/30/18 In the following interview, Charles Melchreit, Andrew Feltus, and Paresh Upadhyaya discuss the factors that affected the performance of Pioneer Global Multisector Income Fund during the six-month period ended April 30, 2018. Mr. Melchreit*, Senior Managing Director, Deputy Head of Fixed Income, U.S., and a portfolio manager at Amundi Pioneer Asset Management, Inc. ("Amundi Pioneer"), Mr. Feltus, Managing Director, Co-Director of High Yield, and a portfolio manager at Amundi Pioneer, and Mr. Upadhyaya, Director of Currency Strategy, a senior vice president, and a portfolio manager at Amundi Pioneer, were responsible for the day-to-day management of the Fund during the six-month period, along with Kenneth J. Taubes, Executive Vice President, Chief Investment Officer, U.S., and a portfolio manager at Amundi Pioneer. Q How did the Fund perform during the six-month period ended April 30, 2018? A Pioneer Global Multisector Income Fund's Class A shares returned -0.21% at net asset value during the six-month period ended April 30, 2018, while the Fund's benchmark, the Bloomberg Barclays Global Aggregate Bond Index (the Bloomberg Barclays Index), returned 1.19%. During the same period, the average return of the 320 mutual funds in Morningstar's World Bond Funds category was 1.02%. Q How would you describe the investment environment in the global fixed-income markets during the six-month period ended April 30, 2018? A The global bond market faced significant headwinds over the past six months, leading to negative returns for most fixed-income categories. In recent years, investors had grown comfortable with the idea that the combination of slow economic growth and low inflation would allow the U.S. Federal Reserve (the Fed) and other major central banks to maintain a gradual approach to tightening monetary policies. The investment backdrop became less favorable toward the end of 2017, however, as economic growth began to pick up steam across the globe. In December, the U.S. Congress passed a tax reform bill, subsequently signed into law by President Trump, which reduced corporate and personal tax rates. The legislation came at a time when the economy was already operating near full capacity, further fueling concerns that growth could accelerate to a level at which inflationary pressures would begin to emerge. Those fears were seemingly confirmed in early February when a U.S. employment report * NOTE: Charles Melchreit was a portfolio manager of the Fund during the full six-month period ended April 30, 2018. Mr. Melchreit departed from Amundi Pioneer effective June 8, 2018. Effective June 8, 2018, Mr. Feltus, Mr. Upadhyaya, Mr. Taubes, and Bradley R. Komenda, Deputy Director of Investment-Grade Corporates, a senior vice president, and a portfolio manager at Amundi Pioneer, will be responsible for the day-to-day management of the Fund. 4 Pioneer Global Multisector Income Fund | Semiannual Report | 4/30/18 showed wages rising more quickly than expected. That raised the possibility of higher inflation, and with it the potential for the Fed to begin hiking interest rates at a faster pace than the markets had been expecting. Given that yields were still trading at low absolute levels entering the six-month period, those events had a significant effect on the bond market. U.S. Treasury yields climbed across the board, with the two- and 10-year notes rising from 1.60% to 2.49%, and 2.38% to 2.95%, respectively, as bond prices fell. The weakness filtered through to the rest of the market, too, leading to negative six-month returns for mortgage-backed securities, investment-grade corporates, high-yield bonds, and emerging markets debt. However, bank loans - which typically offer a floating-rate feature that causes their yields to adjust higher in conjunction with short-term interest rates - posted a healthy gain over the six months thanks to robust investor demand. Despite the many obstacles, the Fund's benchmark, the Bloomberg Barclays Index, nonetheless finished in positive territory for the period, due to the impact of currency translation. The portion of the benchmark invested in non-U.S. debt was aided considerably by the rally in foreign currencies against the U.S. dollar (USD), helping the index finish with a 1.19% return, well ahead of most domestic investment-grade indices. Q What were the principal factors that either contributed to or detracted from the Fund's benchmark-relative returns during the six-month period ended April 30, 2018? A Currency positioning, though not our primary emphasis during the period, was nonetheless the leading cause of the Fund's performance shortfall versus its benchmark. The Fund was underweight in the euro and the Japanese yen, and both rallied on expectations that the central banks in those respective regions would begin to tighten monetary policy. A long position in the Swedish krona, which lagged due to central-bank policy that proved to be more dovish than the markets had been anticipating, also weighed on the Fund's relative results. We gradually reduced the Fund's long-USD positioning by adding more exposure to foreign currencies as the period progressed. The shift reflected our view that the USD continued to face challenges from the possibility of a trade war, a bias toward tighter policy among foreign central banks, and the combination of the rising budgetary and trade deficits in the United States. We retained long positions in the Indonesian rupiah and Indian rupee, due to our belief that those countries are implementing structural reforms and are on a path of sustainable economic growth; however, we trimmed both positions modestly in order to reduce portfolio risk. Pioneer Global Multisector Income Fund | Semiannual Report | 4/30/18 5 Investments in AAA-rated government bonds, which tend to have interest- rate sensitivity that is above average, also detracted from the Fund's relative returns. Issues from Japan, New Zealand, and Sweden were notable laggards in that portion of the portfolio. Positive contributors to the Fund's benchmark-relative performance included the portfolio's duration positioning. We kept the Fund's duration below that of the Bloomberg Barclays Index, largely through positioning in the United States and Europe, which added value given that yields rose in both regions. (Duration is 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.) While we increased the Fund's duration in the United States somewhat later in the period, in response to the jump in yields, we maintained the shorter duration in Europe based on our expectation that rich valuations and likely monetary-policy tightening by the European Central Bank would move yields toward an upward bias. Asset allocation decisions also contributed positively to the Fund's benchmark-relative performance. The portfolio held overweight positions in lower-rated bonds, which performed well relative to their higher-rated counterparts amid investors' ongoing preference for higher-yielding assets during the period. In addition, lower-quality securities tend to be less affected by changes in prevailing interest rates; this was a positive at a time when rates rose considerably. Among the Fund's holdings in the emerging markets, our preference for lower-rated issues was most additive to relative performance, as positions in Ecuador, Gabon, Uruguay, the Bahamas, and Ivory Coast all outperformed. A portfolio allocation to bank loans, which stood at approximately 4.9% of the Fund's invested assets at the end of April, was a further plus, given the category's strong outperformance over the six months. Q Did the Fund invest in any derivative securities during the six-month period ended April 30, 2018? If so, did the derivatives have a material impact on benchmark-relative performance? A We invested the portfolio in three types of derivatives during the period: forward foreign currency transactions (currency forwards), Treasury futures, and credit default swaps. We invested in the currency forwards to help manage the risks to the portfolio of changes in relative currency values. The currency forwards had a modest, negative effect on the Fund's relative performance. We invested in the Treasury futures to help manage interest-rate risk. The Treasury futures helped performance significantly, as the Fund's short-duration stance contributed to relative returns at a time when 6 Pioneer Global Multisector Income Fund | Semiannual Report | 4/30/18 Treasury yields rose and prices came under pressure. The Fund had only a very small exposure to credit default swaps, and they had a slightly positive impact on results. Q Were there any changes in the Fund's distributions** to shareholders during the six-month period ended April 30, 2018? A The Fund's distributions to shareholders rose in comparison to the same period one year ago, due to the increase in yields across the fixed-income market. Q What is your investment outlook, and how is the Fund positioned as of April 30, 2018? A We believe the global economy remains on track for a continued expansion. We anticipate above-trend growth in the United States, thanks in part to the recent tax cut, and we think the Fed is likely to continue raising interest rates for the foreseeable future. We also see a trend toward tighter central-bank policies across the developed markets. Accordingly, we have maintained the Fund's short-duration stance. In terms of country/regional allocations, the Fund has a near-benchmark weighting in the United States, at approximately 39% of the total investment portfolio. A significant portion of that exposure is represented by non-benchmark sectors, including bank loans, high-yield securities, catastrophe bonds, and Treasury inflation-protected securities (which can help protect the portfolio if inflation surprises to the upside). The Fund is underweight in Europe, particularly in low-yielding government bonds, and underweight in lower-yielding Asian debt, including a sizable underweight in Japan. Conversely, the Fund's remains overweight to emerging markets issues, which have continued to be well supported by stronger global growth and rising domestic demand. The allocation to the emerging markets was, at one point, well above the category's weighting in the benchmark, but increased valuations prompted us to trim the portfolio's exposure to the category over the course of the six months. With regard to asset classes, the Fund is overweight in the credit sectors and underweight in developed market government securities. We find most developed market government debt unattractive, but we believe the credit sectors can benefit from stronger economic growth and, in the United States, lower taxes and less regulation. With that said, we did take steps during the period to improve the overall credit quality of the portfolio in order to decrease exposure to credit risk. As part of the process, we reduced ** Distributions are not guaranteed. Pioneer Global Multisector Income Fund | Semiannual Report | 4/30/18 7 the Fund's weighting in high yield and boosted its allocations to both investment-grade corporates and bank loans. We think loans offer an attractive risk/reward profile, due to their floating-rate feature and higher credit quality relative to high-yield bonds. In total, we believe this investment approach can help the Fund take advantage of the wide range of opportunities in the global fixed-income markets, while at the same time striving to manage both interest-rate and credit risks. Please refer to the Schedule of Investments on pages 17-50 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, and economic and political conditions. 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. Investments in high-yield or lower rated securities are subject to greater-than-average price volatility, illiquidity and possibility of default. 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 Fund 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 pre-payments. The securities issued by U.S. Government-sponsored entities (e.g., FNMA, Freddie Mac) are neither guaranteed nor issued by the U.S. Government. Floating rate loans and similar instruments may be illiquid or less liquid than other instruments, and the value of any collateral can decline or be insufficient to meet the issuer's obligations. 8 Pioneer Global Multisector Income Fund | Semiannual Report | 4/30/18 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 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. 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. 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. Pioneer Global Multisector Income Fund | Semiannual Report | 4/30/18 9 Portfolio Summary | 4/30/18 Portfolio Diversification* -------------------------------------------------------------------------------- (As a percentage of total investments)** [THE FOLLOWING DATA WAS REPRESENTED AS A PIE CHART IN THE PRINTED MATERIAL] Foreign Government Bonds 35.6% U.S. Government and Agency Obligations 19.1% International Corporate Bonds 17.7% U.S. Corporate Bonds 13.7% Senior Secured Floating Rate Loan Interests 5.2% Collateralized Mortgage Obligations 4.6% Convertible Preferred Stocks 1.0% Affiliated Closed-End Fund(l) 1.0% Municipal Bonds 0.9% Supranational Obligations 0.7% Asset Backed Securities 0.5% Convertible Corporate Bond 0.0%+ Currency Put Options Purchased 0.0%+ U.S. Preferred Stock 0.0%+ * Includes investments in Insurance-Linked Securities totaling 0.3% of total investments. + Amount rounds to less than 0.1%. Geographical Distribution -------------------------------------------------------------------------------- (As a percentage of total investments based on country of domicile)** [THE FOLLOWING DATA WAS REPRESENTED AS A BAR CHART IN THE PRINTED MATERIAL] United States 45.7% United Kingdom 8.3% Japan 5.3% Sweden 4.2% Australia 4.2% Netherlands 3.0% New Zealand 2.6% Germany 2.5% France 2.2% Argentina 2.0% Canada 1.7% Luxembourg 1.5% Italy 1.1% Brazil 1.1% Norway 1.1% Other (individually less than 1%) 13.5% 10 Largest Holdings -------------------------------------------------------------------------------- (As a percentage of total investments)** 1. Australia Government Bond, 4.75%, 4/21/27 3.86% -------------------------------------------------------------------------------- 2. Sweden Government Bond, 4.25%, 3/12/19 3.71% -------------------------------------------------------------------------------- 3. U.S. Treasury Bills, 5/10/18 2.99% -------------------------------------------------------------------------------- 4. New Zealand Government Bond, 5.5%, 4/15/23 2.58% -------------------------------------------------------------------------------- 5. United Kingdom Gilt, 0.5%, 7/22/22 2.47% -------------------------------------------------------------------------------- 6. Japan Government Twenty Year Bond, 0.6%, 12/20/37 2.15% -------------------------------------------------------------------------------- 7. Fannie Mae, 4.0%, 5/1/48 (TBA) 2.14% -------------------------------------------------------------------------------- 8. Fannie Mae, 3.5%, 5/1/48 (TBA) 2.12% -------------------------------------------------------------------------------- 9. Bundesrepublik Deutschland Bundesanleihe, 0.25%, 2/15/27 1.81% -------------------------------------------------------------------------------- 10. International Finance Corp., 6.3%, 11/25/24 1.47% -------------------------------------------------------------------------------- ** This list excludes temporary cash investments and all derivative contracts except for options purchased. The Fund is actively managed, and current holdings may be different. The holdings listed should not be considered recommendations to buy or sell any security listed. (l) Pioneer ILS Interval Fund is an affiliated fund managed by Amundi Pioneer Asset Management, Inc., formerly Pioneer Investment Management, Inc. (the "Adviser"). 10 Pioneer Global Multisector Income Fund | Semiannual Report | 4/30/18 Prices and Distributions | 4/30/18 Net Asset Value per Share -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- Class 4/30/18 10/31/17 -------------------------------------------------------------------------------- A $10.55 $10.70 -------------------------------------------------------------------------------- C $10.58 $10.73 -------------------------------------------------------------------------------- Y $10.63 $10.80 -------------------------------------------------------------------------------- Distributions per Share: 11/1/17-4/30/18 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- Net Investment Short-Term Long-Term Class Income Capital Gains Capital Gains -------------------------------------------------------------------------------- A $0.1290 $ -- $ -- -------------------------------------------------------------------------------- C $0.0843 $ -- $ -- -------------------------------------------------------------------------------- Y $0.1438 $ -- $ -- -------------------------------------------------------------------------------- Index Definitions -------------------------------------------------------------------------------- The Bloomberg Barclays Global Aggregate Bond Index is an unmanaged index that provides a broad-based measure of the global investment-grade fixed-income markets. 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 appearing on pages 12-14. Pioneer Global Multisector Income Fund | Semiannual Report | 4/30/18 11 Performance Update | 4/30/18 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 Multisector Income Fund at public offering price during the periods shown, compared to that of the Bloomberg Barclays Global Aggregate Bond Index. Average Annual Total Returns (As of April 30, 2018) -------------------------------------------------------------------------------- BBG Barclays Net Public Global Asset Offering Aggregate Value Price Bond Period (NAV) (POP) Index -------------------------------------------------------------------------------- Life of Class (12/27/2007) 3.75% 3.27% 2.60% 5 years 1.66 0.73 0.89 1 year 2.57 -2.04 4.09 -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated March 1, 2018) -------------------------------------------------------------------------------- Gross Net -------------------------------------------------------------------------------- 2.20% 1.04% -------------------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $10,000 Investment Pioneer Global Bloomberg Barclays Global Multisector Income Fund Aggregate Bond Index 4/08 $ 9,550 $10,000 4/09 $ 9,228 $ 9,780 4/10 $10,543 $10,685 4/11 $11,614 $11,802 4/12 $11,967 $12,191 4/13 $12,706 $12,369 4/14 $12,592 $12,569 4/15 $12,839 $12,101 4/16 $12,970 $12,687 4/17 $13,452 $12,421 4/18 $13,798 $12,928 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 March 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. 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 Global Multisector Income Fund | Semiannual Report | 4/30/18 Performance Update | 4/30/18 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 Multisector Income Fund during the periods shown, compared to that of the Bloomberg Barclays Global Aggregate Bond Index. Average Annual Total Returns (As of April 30, 2018) -------------------------------------------------------------------------------- BBG Barclays Global Aggregate If If Bond Period Held Redeemed Index -------------------------------------------------------------------------------- Life of Class (12/27/2007) 2.87% 2.87% 2.60% 5 years 0.80 0.80 0.89 1 year 1.73 1.73 4.09 -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated March 1, 2018) -------------------------------------------------------------------------------- Gross Net -------------------------------------------------------------------------------- 2.28% 1.94% -------------------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $10,000 Investment Pioneer Global Bloomberg Barclays Global Multisector Income Fund Aggregate Bond Index 4/08 $10,000 $10,000 4/09 $ 9,565 $ 9,780 4/10 $10,844 $10,685 4/11 $11,862 $11,802 4/12 $12,120 $12,191 4/13 $12,753 $12,369 4/14 $12,550 $12,569 4/15 $12,671 $12,101 4/16 $12,685 $12,687 4/17 $13,044 $12,421 4/18 $13,270 $12,928 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 March 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. 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 Global Multisector Income Fund | Semiannual Report | 4/30/18 13 Performance Update | 4/30/18 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 Multisector Income Fund during the periods shown, compared to that of the Bloomberg Barclays Global Aggregate Bond Index. Average Annual Total Returns (As of April 30, 2018) -------------------------------------------------------------------------------- BBG Barclays Net Global Asset Aggregate Value Bond Period (NAV) Index -------------------------------------------------------------------------------- Life of Class (12/27/2007) 3.99% 2.60% 5 years 1.91 0.89 1 year 2.74 4.09 -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated March 1, 2018) -------------------------------------------------------------------------------- Gross Net -------------------------------------------------------------------------------- 1.24% 0.79% -------------------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $5 Million Investment Pioneer Global Bloomberg Barclays Global Multisector Income Fund Aggregate Bond Index 4/08 $5,000,000 $5,000,000 4/09 $4,833,939 $4,889,828 4/10 $5,538,368 $5,342,717 4/11 $6,104,875 $5,901,154 4/12 $6,323,455 $6,095,644 4/13 $6,726,789 $6,184,496 4/14 $6,691,510 $6,284,635 4/15 $6,840,585 $6,050,411 4/16 $6,928,662 $6,343,473 4/17 $7,196,833 $6,210,312 4/18 $7,393,742 $6,464,067 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 March 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. 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. 14 Pioneer Global Multisector Income Fund | Semiannual Report | 4/30/18 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 Global Multisector Income Fund Based on actual returns from November 1, 2017, through April 30, 2018. ------------------------------------------------------------------------------- Share Class A C Y ------------------------------------------------------------------------------- Beginning Account Value on 11/1/17 $1,000.00 $1,000.00 $1,000.00 ------------------------------------------------------------------------------- Ending Account Value (after expenses) $ 997.90 $ 993.80 $ 997.40 on 4/30/18 ------------------------------------------------------------------------------- Expenses Paid During Period* $ 4.95 $ 9.05 $ 3.71 ------------------------------------------------------------------------------- * Expenses are equal to the Fund's annualized net expense ratio of 1.00%, 1.83% and 0.75% for Class A, Class C and Class Y shares respectively, multiplied by the average account value over the period, multiplied by 181/365 (to reflect the one-half year period). Pioneer Global Multisector Income Fund | Semiannual Report | 4/30/18 15 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 Global Multisector Income Fund Based on a hypothetical 5% return per year before expenses, reflecting the period from November 1, 2017, through April 30, 2018. -------------------------------------------------------------------------------- Share Class A C Y -------------------------------------------------------------------------------- Beginning Account Value on 11/1/17 $1,000.00 $1,000.00 $1,000.00 -------------------------------------------------------------------------------- Ending Account Value (after expenses) $1,019.84 $1,015.72 $1,021.08 on 4/30/18 -------------------------------------------------------------------------------- Expenses Paid During Period* $ 5.01 $ 9.15 $ 3.76 -------------------------------------------------------------------------------- * Expenses are equal to the Fund's annualized net expense ratio of 1.00%, 1.83% and 0.75% for Class A, Class C and Class Y shares respectively, multiplied by the average account value over the period, multiplied by 181/365 (to reflect the one-half year period). 16 Pioneer Global Multisector Income Fund | Semiannual Report | 4/30/18 Schedule of Investments | 4/30/18 (unaudited) ---------------------------------------------------------------------------------------------------------- Principal Amount USD ($) Value ---------------------------------------------------------------------------------------------------------- UNAFFILIATED ISSUERS -- 100.0% CONVERTIBLE CORPORATE BOND -- 0.0%+ of Net Assets CAPITAL GOODS -- 0.0%+ Electrical Components & Equipment -- 0.0%+ 31,000(a) General Cable Corp., 4.5%, 11/15/29 $ 32,860 ------------ Total Capital Goods $ 32,860 ---------------------------------------------------------------------------------------------------------- TOTAL CONVERTIBLE CORPORATE BOND (Cost $30,809) $ 32,860 ---------------------------------------------------------------------------------------------------------- ---------------------------------------------------------------------------------------------------------- Shares ---------------------------------------------------------------------------------------------------------- PREFERRED STOCK -- 0.0%+ of Net Assets DIVERSIFIED FINANCIALS -- 0.0%+ Consumer Finance -- 0.0%+ 231(b) GMAC Capital Trust I, 7.624% (3 Month USD LIBOR + 579 bps), 2/15/40 $ 6,143 ------------ Total Diversified Financials $ 6,143 ---------------------------------------------------------------------------------------------------------- TOTAL PREFERRED STOCK (Cost $4,504) $ 6,143 ---------------------------------------------------------------------------------------------------------- CONVERTIBLE PREFERRED STOCKS -- 1.0% of Net Assets BANKS -- 1.0% Diversified Banks -- 1.0% 329(c) Bank of America Corp., 7.25% $ 418,817 320(c) Wells Fargo & Co., 7.5% 409,795 ------------ Total Banks $ 828,612 ---------------------------------------------------------------------------------------------------------- TOTAL CONVERTIBLE PREFERRED STOCKS (Cost $799,382) $ 828,612 ---------------------------------------------------------------------------------------------------------- ---------------------------------------------------------------------------------------------------------- Principal Amount USD ($) ---------------------------------------------------------------------------------------------------------- ASSET BACKED SECURITIES -- 0.5% of Net Assets BANKS -- 0.3% Thrifts & Mortgage Finance -- 0.3% 1,600(d) New Century Home Equity Loan Trust, Series 2005-1, Class A2C, 2.597% (1 Month USD LIBOR + 70 bps), 3/25/35 $ 1,601 100,000 Progress Residential Trust, Series 2017-SFR1, Class E, 4.261%, 8/17/34 (144A) 99,095 81,496(a) RCO Mortgage LLC, Series 2017-1, Class A1, 3.375%, 8/25/22 (144A) 81,049 288(a) Structured Asset Securities Corp., Series 2004-19XS, Class A6B, 5.026%, 10/25/34 295 12,375(a) Terwin Mortgage Trust, Series 2005-16HE, Class AF2, 4.761%, 9/25/36 12,419 The accompanying notes are an integral part of these financial statements. Pioneer Global Multisector Income Fund | Semiannual Report | 4/30/18 17 Schedule of Investments | 4/30/18 (unaudited)(continued) ---------------------------------------------------------------------------------------------------------- Principal Amount USD ($) Value ---------------------------------------------------------------------------------------------------------- Thrifts & Mortgage Finance -- (continued) 42,131(a) VOLT LVIII LLC, Series 2017-NPL5, Class A1, 3.375%, 5/28/47 (144A) $ 42,029 ------------ Total Banks $ 236,488 ---------------------------------------------------------------------------------------------------------- FOOD & STAPLES RETAILING -- 0.2% Food Retail -- 0.2% 128,971 CKE Restaurant Holdings, Inc., Series 2013-1A, Class A2, 4.474%, 3/20/43 (144A) $ 129,011 ------------ Total Food & Staples Retailing $ 129,011 ---------------------------------------------------------------------------------------------------------- TOTAL ASSET BACKED SECURITIES (Cost $366,798) $ 365,499 ---------------------------------------------------------------------------------------------------------- COLLATERALIZED MORTGAGE OBLIGATIONS -- 4.7% of Net Assets BANKS -- 4.3% Thrifts & Mortgage Finance -- 4.3% 49,424(b) Agate Bay Mortgage Trust, Series 2015-1, Class A13, 3.5%, 1/25/45 (144A) $ 48,735 40,498(b) Agate Bay Mortgage Trust, Series 2015-5, Class A3, 3.5%, 7/25/45 (144A) 39,727 1,046(d) Alternative Loan Trust, Series 2003-14T1, Class A9, 2.347% (1 Month USD LIBOR + 45 bps), 8/25/18 773 100,000(d) Arbor Realty Commercial Real Estate Notes, Ltd., Series 2017-FL1, Class B, 4.397% (1 Month USD LIBOR + 250 bps), 4/15/27 (144A) 103,000 100,000(d) BAMLL Commercial Mortgage Securities Trust, Series 2014-FL1, Class B, 3.977% (1 Month USD LIBOR + 220 bps), 12/15/31 (144A) 100,676 80,000 BANK, Series 2017-BNK5, Class AS, 3.624%, 6/15/60 78,711 50,000 BANK, Series 2017-BNK8, Class B, 3.931%, 11/15/50 49,560 65,047(a)(e) Bayview Commercial Asset Trust, Series 2007-2A, Class IO, 7/25/37 (144A) -- 150,000 Benchmark Mortgage Trust, Series 2018-B2, Class A4, 3.615%, 2/15/51 148,971 3,258(b) CHL Mortgage Pass-Through Trust, Series 2003-56, Class 4A2, 3.755%, 12/25/33 3,337 100,000(b) Citigroup Commercial Mortgage Trust, Series 2014-GC19, Class B, 4.805%, 3/10/47 102,930 75,000(b) Citigroup Commercial Mortgage Trust, Series 2014-GC25, Class B, 4.345%, 10/10/47 75,258 100,000 Citigroup Commercial Mortgage Trust, Series 2015-GC27, Class A5, 3.137%, 2/10/48 97,394 250,000 Citigroup Commercial Mortgage Trust, Series 2016-P5, Class D, 3.0%, 10/10/49 (144A) 197,087 100,000(d) CLNS Trust, Series 2017-IKPR, Class C, 2.997% (1 Month USD LIBOR + 110 bps), 6/11/32 (144A) 100,187 100,000(d) Cold Storage Trust, Series 2017-ICE3, Class C, 3.247% (1 Month USD LIBOR + 135 bps), 4/15/36 (144A) 100,437 The accompanying notes are an integral part of these financial statements. 18 Pioneer Global Multisector Income Fund | Semiannual Report | 4/30/18 ---------------------------------------------------------------------------------------------------------- Principal Amount USD ($) Value ---------------------------------------------------------------------------------------------------------- Thrifts & Mortgage Finance -- (continued) 50,000 COMM Mortgage Trust, Series 2013-LC6, Class A4, 2.941%, 1/10/46 $ 49,075 100,000(b) COMM Mortgage Trust, Series 2015-CR23, Class CMD, 3.807%, 5/10/48 (144A) 98,864 100,000(b) COMM Mortgage Trust, Series 2015-CR25, Class B, 4.697%, 8/10/48 102,314 200,000 COMM Mortgage Trust, Series 2015-CR26, Class A3, 3.359%, 10/10/48 196,619 90,000 Commercial Mortgage Pass Through Certificates, Series 2012-CR3, Class A3, 2.822%, 10/15/45 88,015 244,786 Commercial Mortgage Pass Through Certificates, Series 2016-CR28, Class AHR, 3.651%, 2/10/49 244,959 50,000(b) CSAIL Commercial Mortgage Trust, Series 2016-C5, Class C, 4.687%, 11/15/48 49,744 25,000 GS Mortgage Securities Corp. II, Series 2013-GC10, Class B, 3.682%, 2/10/46 (144A) 24,783 150,000(b) GS Mortgage Securities RE-Remic Trust, Series 2015-FRR1, Class K3A, 4.727%, 6/27/41 148,010 100,000(d) IMT Trust, Series 2017-APTS, Class BFL, 2.847% (1 Month USD LIBOR + 95 bps), 6/15/34 (144A) 99,937 54,757(d) Interstar Millennium Trust, Series 2003-3G, Class A2, 2.792% (3 Month USD LIBOR + 50 bps), 9/27/35 53,033 27,832 JP Morgan Chase Commercial Mortgage Securities Trust, Series 2011-C5, Class A3, 4.171%, 8/15/46 28,500 75,000 JP Morgan Chase Commercial Mortgage Securities Trust, Series 2012-LC9, Class A5, 2.84%, 12/15/47 73,274 78,435(b) JP Morgan Mortgage Trust, Series 2016-3, Class 2A1, 3.0%, 10/25/46 (144A) 77,019 194,749(b) JP Morgan Mortgage Trust, Series 2016-4, Class A5, 3.5%, 10/25/46 (144A) 193,273 50,000 JPMBB Commercial Mortgage Securities Trust, Series 2014-C22, Class A4, 3.801%, 9/15/47 50,726 100,000(b) Morgan Stanley Bank of America Merrill Lynch Trust, Series 2015-C22, Class D, 4.382%, 4/15/48 (144A) 84,231 100,000 Morgan Stanley Bank of America Merrill Lynch Trust, Series 2015-C25, Class D, 3.068%, 10/15/48 82,239 200,000 Morgan Stanley Capital I Trust, Series 2016-UBS9, Class D, 3.0%, 3/15/49 (144A) 161,805 34,418(b) NRP Mortgage Trust, Series 2013-1, Class A1, 3.25%, 7/25/43 (144A) 33,367 GBP 35,827(d) Paragon Secured Finance No. 1 Plc, Series 1, Class A, 0.947% (3 Month GBP LIBOR + 40 bps), 11/15/35 49,038 214,658(b) Sequoia Mortgage Trust, Series 2013-4, Class A2, 2.5%, 4/25/43 201,468 ------------ Total Banks $ 3,437,076 ---------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Global Multisector Income Fund | Semiannual Report | 4/30/18 19 Schedule of Investments | 4/30/18 (unaudited)(continued) ---------------------------------------------------------------------------------------------------------- Principal Amount USD ($) Value ---------------------------------------------------------------------------------------------------------- DIVERSIFIED FINANCIALS -- 0.0%+ Other Diversified Financial Services -- 0.0%+ 365(d) RALI Trust, Series 2002-QS16, Class A2, 2.447% (1 Month USD LIBOR + 55 bps), 10/25/17 $ 365 ------------ Total Diversified Financials $ 365 ---------------------------------------------------------------------------------------------------------- GOVERNMENT -- 0.4% Government -- 0.4% 5,517 Federal National Mortgage Association REMICS, Series 2009-36, Class HX, 4.5%, 6/25/29 $ 5,700 45,000(b) FREMF Mortgage Trust, Series 2010-K9, Class B, 5.373%, 9/25/45 (144A) 46,883 50,000(b) FREMF Mortgage Trust, Series 2015-K51, Class B, 4.088%, 10/25/48 (144A) 49,909 19,417 Government National Mortgage Association, Series 2005-61, Class UZ, 5.25%, 8/16/35 20,631 21,048 Government National Mortgage Association, Series 2009-83, Class EB, 4.5%, 9/20/39 21,877 199,413 Government National Mortgage Association, Series 2018-20, Class A, 2.5%, 9/16/49 194,730 ------------ Total Government $ 339,730 ---------------------------------------------------------------------------------------------------------- TOTAL COLLATERALIZED MORTGAGE OBLIGATIONS (Cost $3,848,092) $ 3,777,171 ---------------------------------------------------------------------------------------------------------- CORPORATE BONDS -- 31.7% of Net Assets AUTOMOBILES & COMPONENTS -- 0.7% Auto Parts & Equipment -- 0.1% EUR 100,000 Schaeffler Finance BV, 3.25%, 5/15/25 $ 128,793 ---------------------------------------------------------------------------------------------------------- Automobile Manufacturers -- 0.6% 110,000 Ford Motor Co., 4.346%, 12/8/26 $ 107,944 90,000 General Motors Co., 6.6%, 4/1/36 100,826 EUR 100,000 Harman Finance International SCA, 2.0%, 5/27/22 127,196 120,000 Nissan Motor Acceptance Corp., 3.15%, 3/15/21 (144A) 119,379 ------------ $ 455,345 ------------ Total Automobiles & Components $ 584,138 ---------------------------------------------------------------------------------------------------------- BANKS -- 5.4% Diversified Banks -- 4.8% 200,000 Access Bank Plc, 10.5%, 10/19/21 (144A) $ 222,936 INR 2,160,000 Asian Development Bank, 5.9%, 12/20/22 31,543 INR 2,100,000 Asian Development Bank, 6.2%, 10/6/26 30,401 INR 1,740,000 Asian Development Bank, 6.45%, 8/8/21 26,002 EUR 200,000(b) Barclays Plc, 2.625% (5 Year EUR Swap Rate + 245 bps), 11/11/25 249,910 200,000(b) BBVA Bancomer SA, 5.125% (5 Year CMT Index + 265 bps), 1/18/33 (144A) 188,750 EUR 150,000 BNP Paribas SA, 2.375%, 2/17/25 190,405 EUR 200,000 BPCE SA, 2.875%, 4/22/26 260,819 The accompanying notes are an integral part of these financial statements. 20 Pioneer Global Multisector Income Fund | Semiannual Report | 4/30/18 ---------------------------------------------------------------------------------------------------------- Principal Amount USD ($) Value ---------------------------------------------------------------------------------------------------------- Diversified Banks -- (continued) EUR 200,000 CaixaBank SA, 1.125%, 5/17/24 $ 241,155 140,000(d) Canadian Imperial Bank of Commerce, 2.678% (3 Month USD LIBOR + 32 bps), 2/2/21 139,944 75,000 Cooperatieve Rabobank UA, 3.875%, 2/8/22 76,226 EUR 200,000(b)(c) Erste Group Bank AG, 8.875% (5 Year EUR Swap Rate + 902 bps) 292,662 ARS 1,280,000 European Bank for Reconstruction & Development, 0.0% 2/1/19 52,378 EUR 100,000 HSBC Holdings Plc, 0.875%, 9/6/24 119,830 EUR 200,000(b) ING Groep NV, 3.0% (5 Year EUR Swap Rate + 285 bps), 4/11/28 260,720 EUR 100,000(b) Jyske Bank AS, 2.25% (5 Year EUR Swap Rate + 190 bps), 4/5/29 122,814 200,000 Lloyds Banking Group Plc, 4.65%, 3/24/26 198,764 EUR 200,000(b)(c) Lloyds Banking Group Plc, 6.375% (5 Year EUR Swap Rate + 529 bps) 262,762 100,000 Macquarie Bank, Ltd., 6.625%, 4/7/21 (144A) 107,943 EUR 100,000(d) Mediobanca Banca di Credito Finanziario S.p.A., 0.472% (3 Month EURIBOR + 80 bps), 5/18/22 122,497 200,000 QNB Finansbank AS, 4.875%, 5/19/22 (144A) 191,333 200,000(b)(c) Royal Bank of Scotland Group Plc, 8.0% (5 Year USD Swap Rate + 572 bps) 218,750 EUR 200,000 UBS Group Funding Switzerland AG, 1.75%, 11/16/22 252,520 ------------ $ 3,861,064 ---------------------------------------------------------------------------------------------------------- Regional Banks -- 0.1% 90,000(b) SunTrust Bank, 2.59% (3 Month USD LIBOR + 30 bps), 1/29/21 $ 89,141 ---------------------------------------------------------------------------------------------------------- Thrifts & Mortgage Finance -- 0.5% EUR 100,000 Leeds Building Society, 1.375%, 5/5/22 $ 123,697 GBP 125,000 Nationwide Building Society, 3.0%, 5/6/26 180,449 EUR 100,000 Nykredit Realkredit AS, 0.75%, 7/14/21 122,453 ------------ $ 426,599 ------------ Total Banks $ 4,376,804 ---------------------------------------------------------------------------------------------------------- CAPITAL GOODS -- 0.7% Aerospace & Defense -- 0.4% 50,000 Embraer Netherlands Finance BV, 5.4%, 2/1/27 $ 53,375 125,000 Rockwell Collins, Inc., 3.2%, 3/15/24 120,089 EUR 100,000 TA MFG., Ltd., 3.625%, 4/15/23 (144A) 122,921 ------------ $ 296,385 ---------------------------------------------------------------------------------------------------------- Building Products -- 0.2% 30,000 Masco Corp., 4.375%, 4/1/26 $ 30,187 19,000 Masco Corp., 5.95%, 3/15/22 20,574 35,000 Owens Corning, 3.4%, 8/15/26 32,834 The accompanying notes are an integral part of these financial statements. Pioneer Global Multisector Income Fund | Semiannual Report | 4/30/18 21 Schedule of Investments | 4/30/18 (unaudited)(continued) ---------------------------------------------------------------------------------------------------------- Principal Amount USD ($) Value ---------------------------------------------------------------------------------------------------------- Building Products -- (continued) 35,000 Owens Corning, 4.2%, 12/1/24 $ 34,858 30,000 Standard Industries, Inc., 5.375%, 11/15/24 (144A) 30,394 ------------ $ 148,847 ---------------------------------------------------------------------------------------------------------- Electrical Components & Equipment -- 0.1% EUR 100,000 Legrand SA, 1.875%, 7/6/32 $ 125,163 ------------ Total Capital Goods $ 570,395 ---------------------------------------------------------------------------------------------------------- COMMERCIAL & PROFESSIONAL SERVICES -- 0.2% Environmental & Facilities Services -- 0.2% EUR 100,000 ISS Global AS, 1.125%, 1/9/20 $ 122,811 ------------ Total Commercial & Professional Services $ 122,811 ---------------------------------------------------------------------------------------------------------- CONSUMER SERVICES -- 0.4% Casinos & Gaming -- 0.1% 50,000 Scientific Games International, Inc., 10.0%, 12/1/22 $ 53,890 ---------------------------------------------------------------------------------------------------------- Education Services -- 0.1% 25,000 Massachusetts Institute of Technology, 5.6%, 7/1/11 $ 32,363 75,000 Tufts University, 5.017%, 4/15/12 82,100 ------------ $ 114,463 ---------------------------------------------------------------------------------------------------------- Hotels, Resorts & Cruise Lines -- 0.2% EUR 100,000 Accor SA, 1.25%, 1/25/24 $ 121,221 ------------ Total Consumer Services $ 289,574 ---------------------------------------------------------------------------------------------------------- DIVERSIFIED FINANCIALS -- 4.9% Asset Management & Custody Banks -- 0.3% EUR 100,000 Azimut Holding S.p.A., 2.0%, 3/28/22 $ 125,311 100,000 Blackstone Holdings Finance Co., LLC, 5.0%, 6/15/44 (144A) 106,078 ------------ $ 231,389 ---------------------------------------------------------------------------------------------------------- Consumer Finance -- 2.1% 125,000 Capital One Financial Corp., 4.25%, 4/30/25 $ 125,083 INR 81,420,000 International Finance Corp., 6.3%, 11/25/24 1,205,183 INR 20,750,000 International Finance Corp., 8.25%, 6/10/21 325,040 ------------ $ 1,655,306 ---------------------------------------------------------------------------------------------------------- Diversified Capital Markets -- 0.8% 200,000(b)(c) Credit Suisse Group AG, 7.125% (5 Year USD Swap Rate + 511 bps) $ 209,800 150,000 Freedom Mortgage Corp., 8.125%, 11/15/24 (144A) 150,000 EUR 200,000(b)(c) Intesa Sanpaolo S.p.A., 7.75% (5 Year EUR Swap Rate + 719 bps) 296,287 10,000 Macquarie Group, Ltd., 6.0%, 1/14/20 (144A) 10,428 ------------ $ 666,515 ---------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 22 Pioneer Global Multisector Income Fund | Semiannual Report | 4/30/18 ---------------------------------------------------------------------------------------------------------- Principal Amount USD ($) Value ---------------------------------------------------------------------------------------------------------- Investment Banking & Brokerage -- 0.4% EUR 100,000 Goldman Sachs Group, Inc., 1.625%, 7/27/26 $ 121,058 105,000(b) Goldman Sachs Group, Inc., 4.223% (3 Month USD LIBOR + 130 bps), 5/1/29 103,211 75,000 Morgan Stanley, 4.1%, 5/22/23 75,497 50,000 Morgan Stanley, 4.875%, 11/1/22 51,904 ------------ $ 351,670 ---------------------------------------------------------------------------------------------------------- Other Diversified Financial Services -- 0.6% IDR European Bank for Reconstruction & Development, 3,352,500,000 6.45%, 12/13/22 $ 240,199 IDR European Investment Bank, 2,440,000,000 7.2%, 7/9/19 (144A) 175,906 NZD 100,000 JPMorgan Chase & Co., 4.25%, 11/2/18 70,914 ------------ $ 487,019 ---------------------------------------------------------------------------------------------------------- Specialized Finance -- 0.7% 56,000 Cantor Fitzgerald LP, 7.875%, 10/15/19 (144A) $ 59,137 200,000 Gerdau Trade, Inc., 4.875%, 10/24/27 (144A) 193,500 EUR 100,000 Holcim Finance Luxembourg SA, 2.25%, 5/26/28 124,799 200,000 MassMutual Global Funding II, 2.75%, 6/22/24 (144A) 190,791 ------------ $ 568,227 ------------ Total Diversified Financials $ 3,960,126 ---------------------------------------------------------------------------------------------------------- ENERGY -- 4.6% Integrated Oil & Gas -- 1.5% EUR 175,000 BP Capital Markets Plc, 1.373%, 3/3/22 $ 219,658 240,000 Petrobras Global Finance BV, 5.299%, 1/27/25 (144A) 236,040 155,000 Petroleos Mexicanos, 3.5%, 1/30/23 146,708 EUR 100,000 Petroleos Mexicanos, 5.125%, 3/15/23 137,119 EUR 200,000(b) Repsol International Finance BV, 4.5% (EUR Swap Rate + 420 bps), 3/25/75 265,193 EUR 100,000(b)(c) TOTAL SA, 2.25% (5 Year EUR Swap Rate + 186 bps) 124,814 ARS 2,154,200 YPF SA, 16.5%, 5/9/22 (144A) 97,332 ------------ $ 1,226,864 ---------------------------------------------------------------------------------------------------------- Oil & Gas Drilling -- 0.1% 100,000 Rowan Cos., Inc., 4.75%, 1/15/24 $ 85,750 ---------------------------------------------------------------------------------------------------------- Oil & Gas Exploration & Production -- 0.7% 75,000 Antero Resources Corp., 5.625%, 6/1/23 $ 76,593 130,000 Canadian Natural Resources, Ltd., 6.25%, 3/15/38 155,482 95,000 Continental Resources, Inc., 4.375%, 1/15/28 (144A) 93,397 100,000 Hilcorp Energy I LP / Hilcorp Finance Co., 5.75%, 10/1/25 (144A) 99,000 100,000 Range Resources Corp., 5.0%, 3/15/23 96,200 ------------ $ 520,672 ---------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Global Multisector Income Fund | Semiannual Report | 4/30/18 23 Schedule of Investments | 4/30/18 (unaudited)(continued) ---------------------------------------------------------------------------------------------------------- Principal Amount USD ($) Value ---------------------------------------------------------------------------------------------------------- Oil & Gas Refining & Marketing -- 0.4% 80,000 Andeavor, 5.375%, 10/1/22 $ 82,248 85,000 EnLink Midstream Partners LP, 5.45%, 6/1/47 82,043 125,000 Phillips 66 Partners LP, 3.75%, 3/1/28 119,158 29,000 Valero Energy Corp., 6.625%, 6/15/37 36,213 21,000 Valero Energy Corp., 9.375%, 3/15/19 22,165 ------------ $ 341,827 ---------------------------------------------------------------------------------------------------------- Oil & Gas Storage & Transportation -- 1.9% 20,000 Boardwalk Pipelines LP, 4.95%, 12/15/24 $ 20,430 55,000 Cheniere Energy Partners LP, 5.25%, 10/1/25 (144A) 53,762 75,000 DCP Midstream Operating LP, 5.6%, 4/1/44 73,500 25,000 DCP Midstream Operating LP, 9.75%, 3/15/19 (144A) 26,313 75,000 Enable Midstream Partners LP, 3.9%, 5/15/24 72,568 100,000 Enable Midstream Partners LP, 4.4%, 3/15/27 96,897 109,000 Energy Transfer Equity LP, 5.5%, 6/1/27 109,000 100,000 Energy Transfer Equity LP, 5.875%, 1/15/24 102,125 81,000 Enterprise Products Operating LLC, 2.8%, 2/15/21 80,023 225,000 Kinder Morgan, Inc., 5.55%, 6/1/45 230,458 125,000 MPLX LP, 4.875%, 12/1/24 129,582 160,000 Plains All American Pipeline LP / PAA Finance Corp., 4.65%, 10/15/25 160,286 60,000 Sabine Pass Liquefaction LLC, 5.0%, 3/15/27 61,914 10,000 Spectra Energy Capital LLC, 6.75%, 7/15/18 10,074 60,000 Sunoco Logistics Partners Operations LP, 6.1%, 2/15/42 59,866 165,000 Western Gas Partners LP, 4.5%, 3/1/28 162,990 53,000 Williams Cos., Inc., 4.55%, 6/24/24 52,801 37,000 Williams Cos., Inc., 5.75%, 6/24/44 38,573 13,000 Williams Cos., Inc., 7.75%, 6/15/31 15,795 ------------ $ 1,556,957 ------------ Total Energy $ 3,732,070 ---------------------------------------------------------------------------------------------------------- FOOD & STAPLES RETAILING -- 0.3% Drug Retail -- 0.2% 165,000 CVS Health Corp., 4.1%, 3/25/25 $ 164,406 11,933 CVS Pass-Through Trust, 5.773%, 1/10/33 (144A) 12,611 ------------ $ 177,017 ---------------------------------------------------------------------------------------------------------- Food Retail -- 0.1% 75,000 Alimentation Couche-Tard, Inc., 3.55%, 7/26/27 (144A) $ 70,993 ------------ Total Food & Staples Retailing $ 248,010 ---------------------------------------------------------------------------------------------------------- FOOD, BEVERAGE & TOBACCO -- 1.2% Distillers & Vintners -- 0.1% 55,000 Constellation Brands, Inc., 2.25%, 11/6/20 $ 53,750 ---------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 24 Pioneer Global Multisector Income Fund | Semiannual Report | 4/30/18 ---------------------------------------------------------------------------------------------------------- Principal Amount USD ($) Value ---------------------------------------------------------------------------------------------------------- Packaged Foods & Meats -- 0.8% 100,000 Bacardi, Ltd., 5.3%, 5/15/48 (144A) $ 98,675 GBP 100,000 Boparan Finance Plc, 5.5%, 7/15/21 (144A) 130,460 70,000 Kraft Heinz Foods Co., 3.95%, 7/15/25 68,957 200,000 Marfrig Holding Europe BV, 8.0%, 6/8/23 (144A) 202,250 90,000 Post Holdings, Inc., 5.0%, 8/15/26 (144A) 84,375 65,000 Smithfield Foods, Inc., 2.7%, 1/31/20 (144A) 63,987 ------------ $ 648,704 ---------------------------------------------------------------------------------------------------------- Tobacco -- 0.3% EUR 100,000 BAT Capital Corp., 1.125%, 11/16/23 $ 121,111 EUR 100,000 Imperial Brands Finance Plc, 2.25%, 2/26/21 126,998 ------------ $ 248,109 ------------ Total Food, Beverage & Tobacco $ 950,563 ---------------------------------------------------------------------------------------------------------- HEALTH CARE EQUIPMENT & SERVICES -- 1.4% Health Care Distributors -- 0.2% 55,000 AmerisourceBergen Corp., 3.45%, 12/15/27 $ 51,390 116,000 Cardinal Health, Inc., 3.079%, 6/15/24 109,787 ------------ $ 161,177 ---------------------------------------------------------------------------------------------------------- Health Care Equipment -- 0.5% 190,000(d) Becton Dickinson & Co., 2.944% (3 Month USD LIBOR + 88 bps), 12/29/20 $ 190,479 100,000 Boston Scientific Corp., 4.0%, 3/1/28 98,993 120,000 Medtronic, Inc., 3.15%, 3/15/22 119,729 ------------ $ 409,201 ---------------------------------------------------------------------------------------------------------- Health Care Facilities -- 0.1% 35,000 CHS/Community Health Systems, Inc., 6.875%, 2/1/22 $ 18,998 35,000 Kindred Healthcare, Inc., 6.375%, 4/15/22 35,919 ------------ $ 54,917 ---------------------------------------------------------------------------------------------------------- Health Care Services -- 0.2% 173,000 Rede D'or Finance S.a.r.l., 4.95%, 1/17/28 (144A) $ 159,809 ---------------------------------------------------------------------------------------------------------- Health Care Technology -- 0.1% EUR 100,000 Quintiles IMS, Inc., 2.875%, 9/15/25 (144A) $ 117,860 ---------------------------------------------------------------------------------------------------------- Managed Health Care -- 0.3% 38,000 Anthem, Inc., 3.35%, 12/1/24 $ 36,501 40,000 Anthem, Inc., 3.65%, 12/1/27 38,079 6,000 Anthem, Inc., 4.101%, 3/1/28 5,883 30,000 Centene Corp., 5.625%, 2/15/21 30,787 25,000 Centene Corp., 6.125%, 2/15/24 26,188 80,000 Humana, Inc., 3.95%, 3/15/27 78,944 ------------ $ 216,382 ------------ Total Health Care Equipment & Services $ 1,119,346 ---------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Global Multisector Income Fund | Semiannual Report | 4/30/18 25 Schedule of Investments | 4/30/18 (unaudited)(continued) ---------------------------------------------------------------------------------------------------------- Principal Amount USD ($) Value ---------------------------------------------------------------------------------------------------------- INSURANCE -- 2.3% Insurance Brokers -- 0.1% 100,000 Brown & Brown, Inc., 4.2%, 9/15/24 $ 100,952 ---------------------------------------------------------------------------------------------------------- Life & Health Insurance -- 0.5% EUR 100,000(b) CNP Assurances, 6.0% (3 Month EURIBOR + 447 bps), 9/14/40 $ 135,198 EUR 100,000(b)(c) NN Group NV, 4.375% (3 Month EURIBOR + 390 bps) 130,918 45,000 Protective Life Corp., 7.375%, 10/15/19 47,670 100,000 Teachers Insurance & Annuity Association of America, 4.9%, 9/15/44 (144A) 107,324 ------------ $ 421,110 ---------------------------------------------------------------------------------------------------------- Multi-line Insurance -- 1.1% EUR 100,000(b)(c) Allianz SE, 3.375% (10 Year EUR Ice Swap Rate + 320 bps) $ 129,178 EUR 200,000 Assicurazioni Generali S.p.A., 4.125%, 5/4/26 269,862 EUR 100,000(b) Aviva Plc, 6.125% (5 Year EUR Swap Rate + 513 bps), 7/5/43 145,993 EUR 100,000(b)(c) AXA SA, 3.875% (EUR Swap Rate + 325 bps) 130,173 60,000 AXA SA, 8.6%, 12/15/30 81,150 150,000 Liberty Mutual Group, Inc., 4.85%, 8/1/44 (144A) 153,405 ------------ $ 909,761 ---------------------------------------------------------------------------------------------------------- Property & Casualty Insurance -- 0.3% EUR 100,000(b) Credit Logement SA, 1.35% (5 Year EUR Swap Rate + 90 bps), 11/28/29 $ 118,120 35,000 Delphi Financial Group, Inc., 7.875%, 1/31/20 37,625 100,000(b) Farmers Insurance Exchange, 4.747% (3 Month USD LIBOR + 323 bps), 11/1/57 (144A) 93,500 ------------ $ 249,245 ---------------------------------------------------------------------------------------------------------- Reinsurance - 0.3% 30,000+(f)(g) Lorenz Re 2016, Variable Rate Notes, 3/31/19 $ 408 30,000+(f)(g) Lorenz Re 2017, Variable Rate Notes, 3/31/20 26,028 EUR 100,000(f)(g) Muenchener Rueckversicherungs-Gesellschaft AG in Muenchen, Variable Rate Notes, 5/26/42 145,752 30,000+(f)(g) Pangaea Re 2015-2, Variable Rate Notes, 11/30/19 232 30,000+(f)(g) Pangaea Re 2016-1, Variable Rate Notes, 11/30/20 286 50,000+(f)(g) Pangaea Re 2017-1, Variable Rate Notes, 11/30/21 786 50,000+(f)(g) Pangaea Re 2018-1, Variable Rate Notes, 12/31/21 52,540 ------------ $ 226,032 ------------ Total Insurance $ 1,907,100 ---------------------------------------------------------------------------------------------------------- MATERIALS -- 1.3% Construction Materials -- 0.5% EUR 100,000 Buzzi Unicem S.p.A., 2.125%, 4/28/23 $ 126,526 EUR 125,000 CRH Finance, DAC, 3.125%, 4/3/23 168,802 EUR 100,000 HeidelbergCement AG, 2.25%, 6/3/24 128,594 ------------ $ 423,922 ---------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 26 Pioneer Global Multisector Income Fund | Semiannual Report | 4/30/18 ---------------------------------------------------------------------------------------------------------- Principal Amount USD ($) Value ---------------------------------------------------------------------------------------------------------- Diversified Chemicals -- 0.2% EUR 100,000 Arkema SA, 1.5%, 1/20/25 $ 124,578 85,000 CF Industries, Inc., 3.45%, 6/1/23 80,750 ------------ $ 205,328 ---------------------------------------------------------------------------------------------------------- Diversified Metals & Mining -- 0.2% EUR 100,000 Anglo American Capital Plc, 3.25%, 4/3/23 $ 133,005 ---------------------------------------------------------------------------------------------------------- Paper Packaging -- 0.2% 50,000 International Paper Co., 4.8%, 6/15/44 $ 49,297 5,000 International Paper Co., 6.0%, 11/15/41 5,611 EUR 100,000 SIG Combibloc Holdings SCA, 7.75%, 2/15/23 (144A) 125,643 ------------ $ 180,551 ---------------------------------------------------------------------------------------------------------- Specialty Chemicals -- 0.2% EUR 100,000 Covestro AG, 1.75%, 9/25/24 $ 126,909 ------------ Total Materials $ 1,069,715 ---------------------------------------------------------------------------------------------------------- MEDIA -- 1.0% Broadcasting -- 0.2% 200,000 CSC Holdings LLC, 5.375%, 2/1/28 (144A) $ 187,000 ---------------------------------------------------------------------------------------------------------- Cable & Satellite -- 0.6% 180,000 Charter Communications Operating LLC / Charter Communications Operating Capital, 6.384%, 10/23/35 $ 196,381 115,000 Cox Communications, Inc., 3.35%, 9/15/26 (144A) 107,898 EUR 150,000 Sky Plc, 1.5%, 9/15/21 188,120 ------------ $ 492,399 ---------------------------------------------------------------------------------------------------------- Movies & Entertainment -- 0.2% EUR 100,000 WMG Acquisition Corp., 4.125%, 11/1/24 (144A) $ 126,838 ------------ Total Media $ 806,237 ---------------------------------------------------------------------------------------------------------- PHARMACEUTICALS, BIOTECHNOLOGY & LIFE SCIENCES -- 1.0% Biotechnology -- 0.2% 190,000 Biogen, Inc., 5.2%, 9/15/45 $ 199,432 ---------------------------------------------------------------------------------------------------------- Pharmaceuticals -- 0.8% 125,000 Mylan NV, 3.95%, 6/15/26 $ 118,761 200,000 Perrigo Finance Unlimited Co., 3.9%, 12/15/24 196,210 206,000 Shire Acquisitions Investments Ireland, DAC, 2.875%, 9/23/23 194,349 EUR 100,000 Valeant Pharmaceuticals International, Inc., 4.5%, 5/15/23 109,757 ------------ $ 619,077 ------------ Total Pharmaceuticals, Biotechnology & Life Sciences $ 818,509 ---------------------------------------------------------------------------------------------------------- REAL ESTATE -- 1.6% Diversified REITs -- 0.9% EUR 100,000(b)(c) ATF Netherlands BV, 3.75% (5 Year EUR Swap Rate + 438 bps) $ 125,078 200,000 Boston Properties LP, 3.8%, 2/1/24 198,815 The accompanying notes are an integral part of these financial statements. Pioneer Global Multisector Income Fund | Semiannual Report | 4/30/18 27 Schedule of Investments | 4/30/18 (unaudited)(continued) ---------------------------------------------------------------------------------------------------------- Principal Amount USD ($) Value ---------------------------------------------------------------------------------------------------------- Diversified REIT -- (continued) 55,000 Essex Portfolio LP, 3.625%, 5/1/27 $ 52,629 EUR 200,000 GELF Bond Issuer I SA, 0.875%, 10/20/22 242,790 EUR 100,000 Merlin Properties Socimi SA, 2.225%, 4/25/23 127,488 ------------ $ 746,800 ---------------------------------------------------------------------------------------------------------- Health Care REIT -- 0.1% 60,000 Healthcare Trust of America Holdings LP, 3.75%, 7/1/27 $ 56,798 ---------------------------------------------------------------------------------------------------------- Office REIT -- 0.1% 25,000 Alexandria Real Estate Equities, Inc., 3.9%, 6/15/23 $ 25,042 40,000 Alexandria Real Estate Equities, Inc., 4.6%, 4/1/22 41,349 35,000 Highwoods Realty LP, 3.625%, 1/15/23 34,316 ------------ $ 100,707 ---------------------------------------------------------------------------------------------------------- Real Estate Development -- 0.3% EUR 100,000 Akelius Residential Property AB, 1.125%, 3/14/24 $ 117,909 EUR 100,000 Annington Funding Plc, 1.65%, 7/12/24 121,087 ------------ $ 238,996 ---------------------------------------------------------------------------------------------------------- Residential REIT -- 0.1% 50,000 UDR, Inc., 4.0%, 10/1/25 $ 49,539 ---------------------------------------------------------------------------------------------------------- Specialized REIT -- 0.1% 100,000 Uniti Group LP / Uniti Group Finance, Inc. / CSL Capital LLC, 6.0%, 4/15/23 (144A) $ 97,750 ------------ Total Real Estate $ 1,290,590 ---------------------------------------------------------------------------------------------------------- RETAILING -- 0.2% Internet & Direct Marketing Retail -- 0.2% 125,000 Booking Holdings, Inc., 3.55%, 3/15/28 $ 118,925 50,000 Expedia, Inc., 3.8%, 2/15/28 45,607 ------------ Total Retailing $ 164,532 ---------------------------------------------------------------------------------------------------------- SEMICONDUCTORS & SEMICONDUCTOR EQUIPMENT -- 0.1% Semiconductors -- 0.1% 75,000 Broadcom Corp. / Broadcom Cayman Finance, Ltd., 3.125%, 1/15/25 $ 69,537 15,000 Broadcom Corp. / Broadcom Cayman Finance, Ltd., 3.625%, 1/15/24 14,573 ------------ Total Semiconductors & Semiconductor Equipment $ 84,110 ---------------------------------------------------------------------------------------------------------- SOFTWARE & SERVICES -- 0.1% Application Software -- 0.1% 90,000 salesforce.com, Inc., 3.7%, 4/11/28 $ 89,135 ------------ Total Software & Services $ 89,135 ---------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 28 Pioneer Global Multisector Income Fund | Semiannual Report | 4/30/18 ---------------------------------------------------------------------------------------------------------- Principal Amount USD ($) Value ---------------------------------------------------------------------------------------------------------- TECHNOLOGY HARDWARE & EQUIPMENT -- 0.3% Electronic Components -- 0.2% 41,000 Amphenol Corp., 3.2%, 4/1/24 $ 39,455 EUR 100,000 Belden, Inc., 2.875%, 9/15/25 (144A) 118,237 ------------ $ 157,692 ---------------------------------------------------------------------------------------------------------- Electronic Manufacturing Services -- 0.1% 100,000 Flex, Ltd., 4.625%, 2/15/20 $ 101,921 ------------ Total Technology Hardware & Equipment $ 259,613 ---------------------------------------------------------------------------------------------------------- TELECOMMUNICATION SERVICES -- 1.5% Integrated Telecommunication Services -- 0.9% 75,000 AT&T, Inc., 5.15%, 2/14/50 $ 75,988 40,000 Frontier Communications Corp., 7.125%, 1/15/23 28,600 GBP 100,000 Koninklijke KPN NV, 5.0%, 11/18/26 159,149 EUR 125,000(b)(c) Orange SA, 5.0% (5 Year EUR Swap Rate + 399 bps) 175,286 EUR 100,000 TDC AS, 1.75%, 2/27/27 120,142 EUR 100,000 Telekom Finanzmanagement GmbH, 3.5%, 7/4/23 137,971 25,000 Unison Ground Lease Funding LLC, 2.981%, 3/15/20 (144A) 24,518 ------------ $ 721,654 ---------------------------------------------------------------------------------------------------------- Wireless Telecommunication Services -- 0.6% 30,000 Crown Castle Towers LLC, 4.883%, 8/15/20 (144A) $ 30,956 200,000 Digicel, Ltd., 6.0%, 4/15/21 (144A) 190,250 200,000 MTN Mauritius Investment, Ltd., 6.5%, 10/13/26 (144A) 212,002 50,000 SBA Tower Trust, 2.877%, 7/9/21 (144A) 49,074 50,000 Sprint Corp., 7.25%, 9/15/21 53,063 ------------ $ 535,345 ------------ Total Telecommunication Services $ 1,256,999 ---------------------------------------------------------------------------------------------------------- TRANSPORTATION -- 0.5% Airlines -- 0.0%+ 5,530 Delta Air Lines 2010-2 Class A Pass Through Trust, 4.95%, 5/23/19 $ 5,590 15,000 Delta Air Lines, Inc., 2.875%, 3/13/20 14,923 ------------ $ 20,513 ---------------------------------------------------------------------------------------------------------- Highways & Railtracks -- 0.3% EUR 100,000 Brisa Concessao Rodoviaria SA, 2.0%, 3/22/23 $ 128,229 EUR 100,000(b)(c) Ferrovial Netherlands BV, 2.124% (5 Year EUR Swap Rate + 213 bps) 116,608 ------------ $ 244,837 ---------------------------------------------------------------------------------------------------------- Trucking -- 0.2% 80,000 Penske Truck Leasing Co. LP / PTL Finance Corp., 3.375%, 2/1/22 (144A) $ 79,268 90,000 Penske Truck Leasing Co. LP / PTL Finance Corp., 3.95%, 3/10/25 (144A) 89,075 ------------ $ 168,343 ------------ Total Transportation $ 433,693 ---------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Global Multisector Income Fund | Semiannual Report | 4/30/18 29 Schedule of Investments | 4/30/18 (unaudited)(continued) ---------------------------------------------------------------------------------------------------------- Principal Amount USD ($) Value ---------------------------------------------------------------------------------------------------------- UTILITIES -- 2.1% Electric Utilities -- 1.2% EUR 200,000(b)(c) Alliander NV, 1.625% (5 Year EUR Swap Rate + 95 bps) $ 240,798 EUR 100,000 Coentreprise de Transport d'Electricite SA, 0.875%, 9/29/24 120,326 EUR 100,000 EDP Finance BV, 1.875%, 9/29/23 127,432 EUR 100,000(b)(c) Electricite de France SA, 4.25% (EUR Swap Rate + 302 bps) 127,266 GBP 75,000 innogy Finance BV, 5.625%, 12/6/23 122,221 85,000 NextEra Energy Capital Holdings, Inc., 3.55%, 5/1/27 81,666 50,000(b)(c) Southern California Edison Co., 6.25% (3 Month USD LIBOR + 420 bps) 53,000 EUR 100,000(b)(c) TenneT Holding BV, 2.995% (5 Year EUR Swap Rate + 253 bps) 123,679 ------------ $ 996,388 ---------------------------------------------------------------------------------------------------------- Gas Utilities -- 0.6% 15,000 Boston Gas Co., 3.15%, 8/1/27 (144A) $ 14,252 GBP 125,000 Cadent Finance Plc, 2.125%, 9/22/28 162,100 81,939 Nakilat, Inc., 6.267%, 12/31/33 (144A) 90,150 180,000 Texas Eastern Transmission LP, 3.5%, 1/15/28 (144A) 169,548 ------------ $ 436,050 ---------------------------------------------------------------------------------------------------------- Multi-Utilities -- 0.2% EUR 100,000 FCC Aqualia SA, 1.413%, 6/8/22 $ 123,245 65,000 Sempra Energy, 3.4%, 2/1/28 61,393 ------------ $ 184,638 ------------ Total Utilities $ 1,617,076 ---------------------------------------------------------------------------------------------------------- TOTAL CORPORATE BONDS (Cost $25,503,481) $ 25,751,146 ---------------------------------------------------------------------------------------------------------- SUPRANATIONAL BONDS -- 0.7% of Net Assets NZD 505,000 International Bank for Reconstruction & Development, 3.5%, 1/22/21 $ 363,313 NZD 45,000 International Bank for Reconstruction & Development, 4.625%, 10/6/21 33,531 AUD 185,000 International Bank for Reconstruction & Development, 5.75%, 10/21/19 146,295 ------------ $ 543,139 ---------------------------------------------------------------------------------------------------------- TOTAL SUPRANATIONAL BONDS (Cost $558,413) $ 543,139 ---------------------------------------------------------------------------------------------------------- U.S. GOVERNMENT AND AGENCY OBLIGATIONS -- 19.2% of Net Assets 24,363 Fannie Mae, 3.0%, 5/1/31 $ 24,196 41,829 Fannie Mae, 3.0%, 2/1/43 40,721 27,575 Fannie Mae, 3.0%, 3/1/43 26,845 27,456 Fannie Mae, 3.0%, 5/1/43 26,726 31,703 Fannie Mae, 3.0%, 5/1/43 30,843 The accompanying notes are an integral part of these financial statements. 30 Pioneer Global Multisector Income Fund | Semiannual Report | 4/30/18 ---------------------------------------------------------------------------------------------------------- Principal Amount USD ($) Value ---------------------------------------------------------------------------------------------------------- U.S. GOVERNMENT AND AGENCY OBLIGATIONS -- (continued) 31,373 Fannie Mae, 3.0%, 6/1/45 $ 30,476 22,533 Fannie Mae, 3.0%, 9/1/46 21,771 45,176 Fannie Mae, 3.0%, 10/1/46 43,647 62,873 Fannie Mae, 3.0%, 11/1/46 60,745 45,399 Fannie Mae, 3.0%, 1/1/47 44,039 32,406 Fannie Mae, 3.0%, 3/1/47 31,309 550,000 Fannie Mae, 3.0%, 5/1/48 (TBA) 530,492 49,615 Fannie Mae, 3.5%, 6/1/42 49,630 124,170 Fannie Mae, 3.5%, 9/1/42 124,205 147,378 Fannie Mae, 3.5%, 5/1/44 147,238 32,680 Fannie Mae, 3.5%, 2/1/45 32,587 87,224 Fannie Mae, 3.5%, 2/1/45 87,255 21,603 Fannie Mae, 3.5%, 6/1/45 21,502 19,112 Fannie Mae, 3.5%, 8/1/45 19,014 43,976 Fannie Mae, 3.5%, 8/1/45 43,757 21,041 Fannie Mae, 3.5%, 9/1/45 21,046 65,529 Fannie Mae, 3.5%, 9/1/45 65,102 97,035 Fannie Mae, 3.5%, 10/1/45 96,569 21,440 Fannie Mae, 3.5%, 1/1/46 21,314 23,472 Fannie Mae, 3.5%, 7/1/46 23,334 36,133 Fannie Mae, 3.5%, 9/1/46 35,925 69,009 Fannie Mae, 3.5%, 12/1/46 68,601 36,479 Fannie Mae, 3.5%, 1/1/47 36,306 45,370 Fannie Mae, 3.5%, 1/1/47 45,238 45,984 Fannie Mae, 3.5%, 1/1/47 45,712 116,611 Fannie Mae, 3.5%, 2/1/47 115,922 84,216 Fannie Mae, 3.5%, 5/1/47 83,718 87,377 Fannie Mae, 3.5%, 5/1/47 86,861 43,511 Fannie Mae, 3.5%, 7/1/47 43,254 70,420 Fannie Mae, 3.5%, 7/1/47 70,004 137,236 Fannie Mae, 3.5%, 8/1/47 136,425 226,486 Fannie Mae, 3.5%, 10/1/47 225,148 24,509 Fannie Mae, 3.5%, 11/1/47 24,364 48,774 Fannie Mae, 3.5%, 12/1/47 48,481 78,623 Fannie Mae, 3.5%, 12/1/47 78,148 29,777 Fannie Mae, 3.5%, 1/1/48 29,595 44,323 Fannie Mae, 3.5%, 2/1/48 44,057 1,750,000 Fannie Mae, 3.5%, 5/1/48 (TBA) 1,737,422 37,938 Fannie Mae, 4.0%, 10/1/40 39,108 79,608 Fannie Mae, 4.0%, 1/1/42 81,696 16,252 Fannie Mae, 4.0%, 2/1/42 16,687 28,339 Fannie Mae, 4.0%, 5/1/42 29,082 120,568 Fannie Mae, 4.0%, 10/1/43 123,573 The accompanying notes are an integral part of these financial statements. Pioneer Global Multisector Income Fund | Semiannual Report | 4/30/18 31 Schedule of Investments | 4/30/18 (unaudited)(continued) ---------------------------------------------------------------------------------------------------------- Principal Amount USD ($) Value ---------------------------------------------------------------------------------------------------------- U.S. GOVERNMENT AND AGENCY OBLIGATIONS -- (continued) 41,867 Fannie Mae, 4.0%, 11/1/43 $ 42,962 18,094 Fannie Mae, 4.0%, 10/1/44 18,477 84,396 Fannie Mae, 4.0%, 11/1/44 86,158 70,191 Fannie Mae, 4.0%, 10/1/45 71,605 101,366 Fannie Mae, 4.0%, 11/1/45 103,955 51,725 Fannie Mae, 4.0%, 12/1/45 52,734 39,897 Fannie Mae, 4.0%, 6/1/46 40,668 38,902 Fannie Mae, 4.0%, 8/1/46 39,654 21,326 Fannie Mae, 4.0%, 11/1/46 21,754 22,336 Fannie Mae, 4.0%, 11/1/46 22,784 155,053 Fannie Mae, 4.0%, 1/1/47 158,269 23,170 Fannie Mae, 4.0%, 4/1/47 23,719 37,447 Fannie Mae, 4.0%, 4/1/47 38,188 40,203 Fannie Mae, 4.0%, 4/1/47 41,155 23,852 Fannie Mae, 4.0%, 6/1/47 24,326 68,888 Fannie Mae, 4.0%, 6/1/47 70,259 22,209 Fannie Mae, 4.0%, 7/1/47 22,650 38,180 Fannie Mae, 4.0%, 8/1/47 38,943 43,761 Fannie Mae, 4.0%, 12/1/47 44,638 150,000 Fannie Mae, 4.0%, 4/1/48 153,008 1,725,000 Fannie Mae, 4.0%, 5/1/48 (TBA) 1,756,939 7,058 Fannie Mae, 4.5%, 11/1/40 7,429 14,525 Fannie Mae, 4.5%, 12/1/40 15,290 13,305 Fannie Mae, 4.5%, 4/1/41 14,006 10,157 Fannie Mae, 4.5%, 5/1/41 10,715 30,703 Fannie Mae, 4.5%, 11/1/43 32,123 36,354 Fannie Mae, 4.5%, 2/1/44 38,071 43,921 Fannie Mae, 4.5%, 2/1/44 46,016 35,811 Fannie Mae, 4.5%, 5/1/46 37,335 41,608 Fannie Mae, 4.5%, 2/1/47 43,549 675,000 Fannie Mae, 4.5%, 5/1/48 (TBA) 703,107 34,342 Fannie Mae, 5.0%, 8/1/31 36,487 15,422 Fannie Mae, 5.0%, 6/1/40 16,579 10,133 Fannie Mae, 5.5%, 10/1/35 11,020 13,822 Federal Home Loan Mortgage Corp., 3.0%, 9/1/42 13,456 15,606 Federal Home Loan Mortgage Corp., 3.0%, 1/1/43 15,185 31,443 Federal Home Loan Mortgage Corp., 3.0%, 2/1/43 30,572 36,162 Federal Home Loan Mortgage Corp., 3.0%, 4/1/43 35,177 58,986 Federal Home Loan Mortgage Corp., 3.0%, 4/1/43 57,378 16,887 Federal Home Loan Mortgage Corp., 3.0%, 5/1/43 16,419 23,059 Federal Home Loan Mortgage Corp., 3.0%, 9/1/46 22,269 24,337 Federal Home Loan Mortgage Corp., 3.0%, 12/1/46 23,496 67,567 Federal Home Loan Mortgage Corp., 3.0%, 2/1/47 65,241 The accompanying notes are an integral part of these financial statements. 32 Pioneer Global Multisector Income Fund | Semiannual Report | 4/30/18 ---------------------------------------------------------------------------------------------------------- Principal Amount USD ($) Value ---------------------------------------------------------------------------------------------------------- U.S. GOVERNMENT AND AGENCY OBLIGATIONS -- (continued) 16,947 Federal Home Loan Mortgage Corp., 3.5%, 10/1/42 $ 16,968 89,854 Federal Home Loan Mortgage Corp., 3.5%, 6/1/45 89,656 109,329 Federal Home Loan Mortgage Corp., 3.5%, 11/1/45 109,054 19,015 Federal Home Loan Mortgage Corp., 3.5%, 3/1/46 18,963 79,283 Federal Home Loan Mortgage Corp., 3.5%, 7/1/46 79,218 34,017 Federal Home Loan Mortgage Corp., 3.5%, 8/1/46 33,898 88,703 Federal Home Loan Mortgage Corp., 3.5%, 8/1/46 88,809 111,166 Federal Home Loan Mortgage Corp., 3.5%, 8/1/46 111,119 68,219 Federal Home Loan Mortgage Corp., 3.5%, 12/1/46 68,029 24,150 Federal Home Loan Mortgage Corp., 3.5%, 6/1/47 24,012 57,384 Federal Home Loan Mortgage Corp., 3.5%, 7/1/47 57,045 57,095 Federal Home Loan Mortgage Corp., 3.5%, 8/1/47 56,753 24,545 Federal Home Loan Mortgage Corp., 3.5%, 11/1/47 24,395 29,479 Federal Home Loan Mortgage Corp., 3.5%, 11/1/47 29,300 24,886 Federal Home Loan Mortgage Corp., 3.5%, 1/1/48 24,733 49,300 Federal Home Loan Mortgage Corp., 3.5%, 1/1/48 48,998 106,860 Federal Home Loan Mortgage Corp., 4.0%, 1/1/44 109,408 32,221 Federal Home Loan Mortgage Corp., 4.0%, 2/1/44 33,027 182,375 Federal Home Loan Mortgage Corp., 4.0%, 5/1/44 186,601 13,192 Federal Home Loan Mortgage Corp., 4.0%, 12/1/44 13,497 20,297 Federal Home Loan Mortgage Corp., 4.0%, 1/1/46 20,768 35,499 Federal Home Loan Mortgage Corp., 4.0%, 2/1/46 36,322 22,582 Federal Home Loan Mortgage Corp., 4.0%, 4/1/47 23,120 24,041 Federal Home Loan Mortgage Corp., 4.0%, 4/1/47 24,613 45,729 Federal Home Loan Mortgage Corp., 4.0%, 4/1/47 46,717 47,163 Federal Home Loan Mortgage Corp., 4.0%, 4/1/47 48,286 102,925 Federal Home Loan Mortgage Corp., 4.0%, 4/1/47 105,176 116,994 Federal Home Loan Mortgage Corp., 4.0%, 5/1/47 119,490 214,097 Federal Home Loan Mortgage Corp., 4.0%, 10/1/47 218,375 151,177 Federal Home Loan Mortgage Corp., 4.0%, 12/1/47 154,396 41,925 Federal Home Loan Mortgage Corp., 4.5%, 6/1/41 44,059 71,528 Federal Home Loan Mortgage Corp., 4.5%, 5/1/47 74,523 21,565 Federal Home Loan Mortgage Corp., 5.0%, 9/1/38 23,099 25,114 Federal Home Loan Mortgage Corp., 5.0%, 10/1/38 26,899 3,884 Federal Home Loan Mortgage Corp., 5.0%, 5/1/39 4,168 6,864 Federal Home Loan Mortgage Corp., 5.0%, 12/1/39 7,380 13,466 Federal Home Loan Mortgage Corp., 6.0%, 8/1/37 14,874 14,826 Federal Home Loan Mortgage Corp., 6.5%, 1/1/38 16,771 28,893 Federal Home Loan Mortgage Corp., 6.5%, 4/1/38 32,546 54,659 Government National Mortgage Association I, 3.5%, 11/15/41 55,022 9,910 Government National Mortgage Association I, 3.5%, 10/15/42 9,995 32,453 Government National Mortgage Association I, 3.5%, 8/15/46 32,518 36,913 Government National Mortgage Association I, 4.0%, 4/15/45 37,782 The accompanying notes are an integral part of these financial statements. Pioneer Global Multisector Income Fund | Semiannual Report | 4/30/18 33 Schedule of Investments | 4/30/18 (unaudited)(continued) ---------------------------------------------------------------------------------------------------------- Principal Amount USD ($) Value ---------------------------------------------------------------------------------------------------------- U.S. GOVERNMENT AND AGENCY OBLIGATIONS -- (continued) 56,335 Government National Mortgage Association I, 4.0%, 6/15/45 $ 57,648 27,610 Government National Mortgage Association I, 4.5%, 1/15/40 29,141 21,695 Government National Mortgage Association I, 4.5%, 9/15/40 22,856 10,731 Government National Mortgage Association I, 4.5%, 10/15/40 11,313 19,786 Government National Mortgage Association I, 4.5%, 7/15/41 20,737 34,498 Government National Mortgage Association II, 3.0%, 9/20/46 33,744 31,407 Government National Mortgage Association II, 4.5%, 9/20/41 32,992 73,955(d) Government National Mortgage Association II, 4.5%, 9/20/44 75,654 20,591 Government National Mortgage Association II, 4.5%, 10/20/44 21,658 44,116 Government National Mortgage Association II, 4.5%, 11/20/44 46,401 170,000 Government National Mortgage Association II, 4.5%, 4/20/48 177,266 2,455,000(h) U.S. Treasury Bills, 5/10/18 2,454,058 433,522 U.S. Treasury Inflation Indexed Bonds, 0.75%, 2/15/45 417,041 515,740 U.S. Treasury Inflation Indexed Bonds, 0.875%, 2/15/47 511,369 236,439 U.S. Treasury Inflation Indexed Bonds, 1.0%, 2/15/46 241,720 ------------ $ 15,627,435 ---------------------------------------------------------------------------------------------------------- TOTAL U.S. GOVERNMENT AND AGENCY OBLIGATIONS (Cost $15,825,751) $ 15,627,435 ---------------------------------------------------------------------------------------------------------- FOREIGN GOVERNMENT BONDS -- 36.0% of Net Assets Argentina -- 1.9% 100,000 Argentine Republic Government International Bond, 6.875%, 1/26/27 $ 99,601 300,000 Argentine Republic Government International Bond, 7.5%, 4/22/26 314,400 250,000 Autonomous City of Buenos Aires Argentina, 7.5%, 6/1/27 (144A) 258,175 300,000 Provincia de Buenos Aires, 9.125%, 3/16/24 (144A) 333,000 300,000 Provincia de Buenos Aires, 9.95%, 6/9/21 (144A) 332,907 210,000 Provincia de Entre Rios Argentina, 8.75%, 2/8/25 (144A) 210,735 ------------ $ 1,548,818 ---------------------------------------------------------------------------------------------------------- Australia -- 3.9% AUD 3,625,000 Australia Government Bond, 4.75%, 4/21/27 $ 3,161,736 ---------------------------------------------------------------------------------------------------------- Austria -- 0.1% EUR 50,000 Republic of Austria Government Bond, 4.15%, 3/15/37 (144A) $ 90,658 ---------------------------------------------------------------------------------------------------------- Bahamas -- 0.3% 200,000 Bahamas Government International Bond, 6.0%, 11/21/28 (144A) $ 207,000 ---------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 34 Pioneer Global Multisector Income Fund | Semiannual Report | 4/30/18 ---------------------------------------------------------------------------------------------------------- Principal Amount USD ($) Value ---------------------------------------------------------------------------------------------------------- Bahrain -- 0.2% 200,000 Bahrain Government International Bond, 7.0%, 10/12/28 (144A) $ 190,693 ---------------------------------------------------------------------------------------------------------- Brazil -- 1.1% BRL 2,582,000 Brazilian Government International Bond, 12.5%, 1/5/22 $ 879,003 ---------------------------------------------------------------------------------------------------------- Canada -- 1.1% CAD 1,125,000 Canadian Government Bond, 2.25%, 6/1/25 $ 877,235 ---------------------------------------------------------------------------------------------------------- Cayman Islands -- 0.3% 228,000 Brazil Minas SPE via State of Minas Gerais, 5.333%, 2/15/28 (144A) $ 226,860 ---------------------------------------------------------------------------------------------------------- Cote D'Ivoire -- 0.9% EUR 100,000 Ivory Coast Government International Bond, 5.125%, 6/15/25 (144A) $ 127,615 EUR 150,000 Ivory Coast Government International Bond, 5.25%, 3/22/30 (144A) 183,527 415,000 Ivory Coast Government International Bond, 6.375%, 3/3/28 (144A) 417,677 ------------ $ 728,819 ---------------------------------------------------------------------------------------------------------- Dominican Republic -- 0.2% DOP 8,000,000 Dominican Republic International Bond, 8.9%, 2/15/23 (144A) $ 166,825 ---------------------------------------------------------------------------------------------------------- Ecuador -- 0.1% 78,947(d) EP PetroEcuador via Noble Sovereign Funding I, Ltd., 7.925% (3 Month USD LIBOR + 563 bps), 9/24/19 $ 78,932 ---------------------------------------------------------------------------------------------------------- Egypt -- 0.5% EGP 6,475,000(h) Egypt Treasury Bills, 5/15/18 $ 364,887 EGP 1,100,000(h) Egypt Treasury Bills, 9/11/18 58,664 ------------ $ 423,551 ---------------------------------------------------------------------------------------------------------- Gabon -- 0.5% 400,000 Gabon Government International Bond, 6.375%, 12/12/24 (144A) $ 389,837 ---------------------------------------------------------------------------------------------------------- Germany -- 1.8% EUR 1,250,000 Bundesrepublik Deutschland Bundesanleihe, 0.25%, 2/15/27 $ 1,486,585 ---------------------------------------------------------------------------------------------------------- Japan -- 5.4% JPY 120,000,000 Japan Government Ten Year Bond, 0.1%, 9/20/26 $ 1,106,381 JPY 50,000,000 Japan Government Ten Year Bond, 1.0%, 12/20/21 476,163 JPY 110,000,000 Japan Government Thirty Year Bond, 0.8%, 12/20/47 1,021,570 JPY 190,000,000 Japan Government Twenty Year Bond, 0.6%, 12/20/37 1,763,800 ------------ $ 4,367,914 ---------------------------------------------------------------------------------------------------------- Kenya -- 0.3% 200,000 Kenya Government International Bond, 7.25%, 2/28/28 (144A) $ 206,435 ---------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Global Multisector Income Fund | Semiannual Report | 4/30/18 35 Schedule of Investments | 4/30/18 (unaudited)(continued) ---------------------------------------------------------------------------------------------------------- Principal Amount USD ($) Value ---------------------------------------------------------------------------------------------------------- Mexico -- 0.6% MXN 3,830,000 Mexican Bonos, 4.75%, 6/14/18 $ 203,732 MXN 2,400,000 Mexican Bonos, 6.5%, 6/9/22 124,230 MXN 300,000 Mexican Bonos, 7.5%, 6/3/27 16,039 MXN 3,461,259 Mexican Udibonos, 2.0%, 6/9/22 173,469 ------------ $ 517,470 ---------------------------------------------------------------------------------------------------------- New Zealand -- 2.6% NZD 2,625,000 New Zealand Government Bond, 5.5%, 4/15/23 $ 2,114,386 ---------------------------------------------------------------------------------------------------------- Nigeria -- 0.5% 408,000 Africa Finance Corp., 4.375%, 4/29/20 (144A) $ 407,743 ---------------------------------------------------------------------------------------------------------- Norway -- 1.1% NOK 6,750,000 Norway Government Bond, 4.5%, 5/22/19 (144A) $ 874,824 ---------------------------------------------------------------------------------------------------------- Oman -- 0.5% 200,000 Oman Government International Bond, 5.375%, 3/8/27 (144A) $ 190,465 200,000 Oman Government International Bond, 5.625%, 1/17/28 (144A) 190,994 ------------ $ 381,459 ---------------------------------------------------------------------------------------------------------- Paraguay -- 0.2% 200,000 Paraguay Government International Bond, 4.7%, 3/27/27 (144A) $ 199,000 ---------------------------------------------------------------------------------------------------------- Portugal -- 0.2% EUR 100,000 Portugal Obrigacoes do Tesouro OT, 4.95%, 10/25/23 (144A) $ 149,225 ---------------------------------------------------------------------------------------------------------- Saudi Arabia -- 0.4% 300,000 Saudi Government International Bond, 4.0%, 4/17/25 (144A) $ 295,721 ---------------------------------------------------------------------------------------------------------- Senegal -- 0.2% 200,000 Senegal Government International Bond, 6.25%, 5/23/33 (144A) $ 192,766 ---------------------------------------------------------------------------------------------------------- Slovenia -- 0.2% EUR 150,000 Slovenia Government Bond, 1.25%, 3/22/27 $ 184,651 ---------------------------------------------------------------------------------------------------------- South Korea -- 0.3% INR 14,300,000 Export-Import Bank of Korea, 6.9%, 2/7/23 $ 211,432 ---------------------------------------------------------------------------------------------------------- Sri Lanka -- 0.8% 500,000 Sri Lanka Government International Bond, 5.75%, 4/18/23 (144A) $ 496,838 200,000 Sri Lanka Government International Bond, 6.2%, 5/11/27 (144A) 192,964 ------------ $ 689,802 ---------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 36 Pioneer Global Multisector Income Fund | Semiannual Report | 4/30/18 ---------------------------------------------------------------------------------------------------------- Principal Amount USD ($) Value ---------------------------------------------------------------------------------------------------------- Sweden -- 4.1% SEK 2,300,000 Sweden Government Bond, 2.5%, 5/12/25 $ 302,351 SEK 25,545,000 Sweden Government Bond, 4.25%, 3/12/19 3,043,915 ------------ $ 3,346,266 ---------------------------------------------------------------------------------------------------------- Turkey -- 0.2% 140,000 Hazine Mustesarligi Varlik Kiralama AS, 5.004%, 4/6/23 (144A) $ 139,829 ---------------------------------------------------------------------------------------------------------- United Kingdom -- 4.7% GBP 1,500,000 United Kingdom Gilt, 0.5%, 7/22/22 $ 2,020,915 GBP 450,000 United Kingdom Gilt, 3.5%, 1/22/45 833,302 GBP 400,000 United Kingdom Gilt, 4.25%, 12/7/27 689,343 GBP 150,000 United Kingdom Gilt, 4.25%, 9/7/39 295,434 ------------ $ 3,838,994 ---------------------------------------------------------------------------------------------------------- Uruguay -- 0.8% UYU 9,313,000 Uruguay Government International Bond, 8.5%, 3/15/28 (144A) $ 312,395 UYU 8,516,000 Uruguay Government International Bond, 9.875%, 6/20/22 (144A) 311,242 ------------ $ 623,637 ---------------------------------------------------------------------------------------------------------- TOTAL FOREIGN GOVERNMENT BONDS (Cost $29,642,958) $ 29,198,106 ---------------------------------------------------------------------------------------------------------- MUNICIPAL BONDS -- 0.9% of Net Assets (i) Higher Municipal Education -- 0.2% 25,000 Baylor University, Series A, 4.313%, 3/1/42 $ 25,007 25,000 California Educational Facilities Authority, Stanford University, Series U-7, 5.0%, 6/1/46 32,039 15,000 Massachusetts Development Finance Agency, Harvard University, Series A, 5.0%, 7/15/40 19,101 50,000 University of Virginia, Refunding General Green, Series A-2, 5.0%, 4/1/45 56,068 ------------ $ 132,215 ---------------------------------------------------------------------------------------------------------- Municipal General -- 0.4% 70,000 JobsOhio Beverage System, Series B, 3.985%, 1/1/29 $ 71,551 20,000 JobsOhio Beverage System, Series B, 4.532%, 1/1/35 21,433 125,000 Rhode Island Health & Educational Building Corp., Brown University, Series A, 4.0%, 9/1/47 129,028 30,000 Virginia Commonwealth Transportation Board, Transportation Capital Projects, 4.0%, 5/15/31 31,713 30,000 Virginia Commonwealth Transportation Board, Transportation Capital Projects, 4.0%, 5/15/32 31,560 ------------ $ 285,285 ---------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Global Multisector Income Fund | Semiannual Report | 4/30/18 37 Schedule of Investments | 4/30/18 (unaudited)(continued) ---------------------------------------------------------------------------------------------------------- Principal Amount USD ($) Value ---------------------------------------------------------------------------------------------------------- Municipal Higher Education -- 0.0%+ 20,000 New York State Dormitory Authority, Columbia University, Series A-2, 5.0%, 10/1/46 $ 25,671 ---------------------------------------------------------------------------------------------------------- Municipal Medical -- 0.0%+ 30,000 Illinois Finance Authority, Northwestern Memorial Healthcare, 4.0%, 7/15/47 $ 30,457 10,000 Massachusetts Development Finance Agency, Partners Healthcare System, 4.0%, 7/1/36 10,241 15,000 Massachusetts Development Finance Agency, Partners Healthcare System, 4.0%, 7/1/41 15,167 ------------ $ 55,865 ---------------------------------------------------------------------------------------------------------- Municipal Obligation -- 0.2% 100,000(j) Commonwealth of Pennsylvania, 1st Series, 4.0%, 1/1/29 $ 105,698 50,000(j) State of Texas, Transportation Commission Mobility Fund, Series A, 4.0%, 10/1/44 51,627 ------------ $ 157,325 ---------------------------------------------------------------------------------------------------------- Municipal School District -- 0.1% 25,000(j) Frisco Independent School District, 4.0%, 8/15/40 (PSF-GTD Insured) $ 25,916 25,000(j) Frisco Independent School District, 4.0%, 8/15/45 (PSF-GTD Insured) 25,840 ------------ $ 51,756 ---------------------------------------------------------------------------------------------------------- Municipal Water -- 0.0%+ 15,000 JEA Water & Sewer System Revenue, Series A, 4.0%, 10/1/35 $ 15,683 15,000 JEA Water & Sewer System Revenue, Series A, 4.0%, 10/1/39 15,572 ------------ $ 31,255 ---------------------------------------------------------------------------------------------------------- TOTAL MUNICIPAL BONDS (Cost $747,209) $ 739,372 ---------------------------------------------------------------------------------------------------------- SENIOR SECURED FLOATING RATE LOAN INTERESTS -- 5.3% of Net Assets*(d) AUTOMOBILES & COMPONENTS -- 0.2% Auto Parts & Equipment -- 0.2% 99,250 American Axle & Manufacturing, Inc., Tranche B Term Loan, 4.15% (LIBOR + 225 bps), 4/6/24 $ 99,840 48,931 Electrical Components International, Inc., Term Loan, 7.052% (LIBOR + 475 bps), 5/28/21 49,114 ------------ Total Automobiles & Components $ 148,954 ---------------------------------------------------------------------------------------------------------- CAPITAL GOODS -- 0.4% Aerospace & Defense -- 0.1% 49,875 MacDonald, Dettwiler and Associates, Ltd., Initial Term B Loan, 4.66% (LIBOR + 275 bps), 10/4/24 $ 50,045 ---------------------------------------------------------------------------------------------------------- Construction & Engineering -- 0.1% 100,000 AECOM (fka AECOM Technology Corp.), Term B Loan, 3.65% (LIBOR + 175 bps), 3/13/25 $ 100,458 ---------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 38 Pioneer Global Multisector Income Fund | Semiannual Report | 4/30/18 ---------------------------------------------------------------------------------------------------------- Principal Amount USD ($) Value ---------------------------------------------------------------------------------------------------------- Electrical Components & Equipment -- 0.2% 45,161 Convergint Technologies Holdings LLC, First Lien Initial Term Loan, 5.3% (LIBOR + 300 bps), 2/3/25 $ 45,217 100,000(k) Dell International LLC, Refinancing Term B Loan, 9/7/23 100,424 ------------ $ 145,641 ---------------------------------------------------------------------------------------------------------- Industrial Conglomerates -- 0.0%+ 46,860 Milacron LLC, Term B Loan, 4.401% (LIBOR + 250 bps), 9/28/23 $ 46,948 ------------ Total Capital Goods $ 343,092 ---------------------------------------------------------------------------------------------------------- COMMERCIAL & PROFESSIONAL SERVICES -- 0.3% Diversified Support Services -- 0.1% 74,813 Aristocrat Leisure, Ltd., 2017/2018 Incremental Term Loan, 4.36% (LIBOR + 200 bps), 10/19/24 $ 75,320 ---------------------------------------------------------------------------------------------------------- Human Resource & Employment Services -- 0.1% 95,742 On Assignment, Inc., Initial Term B-2 Loan, 3.9% (LIBOR + 200 bps), 4/2/25 $ 96,317 ---------------------------------------------------------------------------------------------------------- Office Services & Supplies -- 0.1% 100,000 West Corp., Incremental Term B-1 Loan, 5.4% (LIBOR + 350 bps), 10/10/24 $ 100,948 ------------ Total Commercial & Professional Services $ 272,585 ---------------------------------------------------------------------------------------------------------- CONSUMER SERVICES -- 0.3% Casinos & Gaming -- 0.1% 50,000 Scientific Games International, Inc., Initial Term B-5 Loan, 4.73% (LIBOR + 275 bps), 8/14/24 $ 50,378 ---------------------------------------------------------------------------------------------------------- Leisure Facilities -- 0.2% 99,749 Life Time Fitness, Inc., 2017 Refinancing Term Loan, 4.734% (LIBOR + 275 bps), 6/10/22 $ 100,213 50,000 Six Flags Theme Parks, Inc., Tranche B Term Loan, 3.65% (LIBOR + 175 bps/ PRIME + 75 bps), 6/30/22 50,281 ------------ $ 150,494 ---------------------------------------------------------------------------------------------------------- Specialized Consumer Services -- 0.0%+ 49,373 KUEHG Corp. (fka KC MergerSub, Inc.), Term B-2 Loan, 6.052% (LIBOR + 375 bps), 8/12/22 $ 49,813 ------------ Total Consumer Services $ 250,685 ---------------------------------------------------------------------------------------------------------- DIVERSIFIED FINANCIALS -- 0.4% Diversified Capital Markets -- 0.2% 149,749 Avolon TLB Borrower 1 (US) LLC, Initial Term B-2 Loan, 4.147% (LIBOR + 225 bps), 3/21/22 $ 150,228 25,000 Trico Group LLC, First Lien Initial Term Loan, 8.48% (LIBOR + 650 bps), 2/2/24 25,125 ------------ $ 175,353 ---------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Global Multisector Income Fund | Semiannual Report | 4/30/18 39 Schedule of Investments | 4/30/18 (unaudited)(continued) ---------------------------------------------------------------------------------------------------------- Principal Amount USD ($) Value ---------------------------------------------------------------------------------------------------------- Specialized Finance -- 0.2% 49,396 1011778 BC Unlimited Liability Co. (New Red Finance, Inc.) (aka Burger King/Tim Hortons), Term B-3 Loan, 4.151% (LIBOR + 225 bps), 2/16/24 $ 49,545 100,000(k) SBA Senior Finance II LLC, Initial Term Loan, 4/11/25 100,382 ------------ $ 149,927 ------------ Total Diversified Financials $ 325,280 ---------------------------------------------------------------------------------------------------------- ENERGY -- 0.1% Oil & Gas Equipment & Services -- 0.1% 100,000(k) Apergy Corp., Term Loan B, 4/18/25 $ 100,750 ------------ Total Energy $ 100,750 ---------------------------------------------------------------------------------------------------------- FOOD & STAPLES RETAILING -- 0.1% Food Retail -- 0.1% 49,875 Packers Holdings LLC, Initial Term Loan, 5.13% (LIBOR + 325 bps), 12/4/24 $ 50,041 ------------ Total Food & Staples Retailing $ 50,041 ---------------------------------------------------------------------------------------------------------- FOOD, BEVERAGE & TOBACCO -- 0.1% Packaged Foods & Meats -- 0.1% 24,875 Give & Go Prepared Foods Corp., First Lien 2017 Term Loan, 6.19% (LIBOR + 425 bps), 7/29/23 $ 25,010 80,000(k) JBS USA Lux SA (fka JBS USA LLC), Initial Term Loan, 10/30/22 80,030 ------------ Total Food, Beverage & Tobacco $ 105,040 ---------------------------------------------------------------------------------------------------------- HEALTH CARE EQUIPMENT & SERVICES -- 0.4% Health Care Facilities -- 0.3% 50,000(k) ATI Holdings Acquisition, Inc., First Lien Initial Term Loan, 5/10/23 $ 50,260 100,000 HCA, Inc., Tranche B-10 Term Loan, 3.9% (LIBOR + 200 bps), 3/13/25 101,139 48,859 Kindred Healthcare, Inc., New Term Loan, 5.875% (LIBOR + 350 bps), 4/9/21 49,079 ------------ $ 200,478 ---------------------------------------------------------------------------------------------------------- Health Care Technology -- 0.0%+ 24,750 Change Healthcare Holdings, Inc. (fka Emdeon, Inc.), Closing Date Term Loan, 4.651% (LIBOR + 275 bps), 3/1/24 $ 24,876 ---------------------------------------------------------------------------------------------------------- Managed Health Care -- 0.1% 100,000 Prospect Medical Holdings, Inc., Term B-1 Loan, 7.44% (LIBOR + 550 bps), 2/22/24 $ 100,375 ------------ Total Health Care Equipment & Services $ 325,729 ---------------------------------------------------------------------------------------------------------- HOUSEHOLD & PERSONAL PRODUCTS -- 0.2% Personal Products -- 0.2% 100,000 Coty, Inc., USD Term Loan B, 4.13% (LIBOR + 225 bps), 4/7/25 $ 99,953 The accompanying notes are an integral part of these financial statements. 40 Pioneer Global Multisector Income Fund | Semiannual Report | 4/30/18 ---------------------------------------------------------------------------------------------------------- Principal Amount USD ($) Value ---------------------------------------------------------------------------------------------------------- Personal Products -- (continued) 98,995 Revlon Consumer Products Corp., Initial Term B Loan, 5.401% (LIBOR + 350 bps), 9/7/23 $ 77,665 ------------ Total Household & Personal Products $ 177,618 ---------------------------------------------------------------------------------------------------------- INSURANCE -- 0.1% Life & Health Insurance -- 0.0%+ 49,619 Integro Parent, Inc., First Lien Initial Term Loan, 7.658% (LIBOR + 575 bps), 10/31/22 $ 49,620 ---------------------------------------------------------------------------------------------------------- Property & Casualty Insurance -- 0.1% 50,000(k) USI, Inc. (fka Compass Investors, Inc.), 2017 New Term Loan, 5/16/24 $ 50,272 ------------ Total Insurance $ 99,892 ---------------------------------------------------------------------------------------------------------- MATERIALS -- 0.4% Metal & Glass Containers -- 0.1% 50,000 Crown Holdings, Inc., Dollar Term B Loan, 4.31% (LIBOR + 200 bps), 4/3/25 $ 50,520 ---------------------------------------------------------------------------------------------------------- Specialty Chemicals -- 0.2% 100,000 Axalta Coating Systems Dutch Holding B BV (Axalta Coating Systems US Holdings, Inc.), Term B-2 Dollar Loan, 4.05% (LIBOR + 175 bps), 6/1/24 $ 100,511 49,875 PQ Corp., Third Amendment Tranche B-1 Term Loan, 4.4% (LIBOR + 250 bps), 2/8/25 50,238 ------------ $ 150,749 ---------------------------------------------------------------------------------------------------------- Steel -- 0.1% 49,875 Atkore International, Inc., First Lien Initial Incremental Term Loan, 5.06% (LIBOR + 275 bps), 12/22/23 $ 50,320 49,375 Zekelman Industries, Inc. (fka JMC Steel Group, Inc.), Term Loan, 4.999% (LIBOR + 275 bps), 6/14/21 49,694 ------------ $ 100,014 ------------ Total Materials $ 301,283 ---------------------------------------------------------------------------------------------------------- MEDIA -- 0.4% Advertising -- 0.1% 100,000 Lamar Media Corp., Term B Loan, 3.69% (LIBOR + 175 bps), 3/14/25 $ 100,375 ---------------------------------------------------------------------------------------------------------- Broadcasting -- 0.1% 50,000 CSC Holdings LLC (fka CSC Holdings, Inc. (Cablevision)), January 2018 Incremental Term Loan, 4.4% (LIBOR + 250 bps), 1/25/26 $ 50,209 ---------------------------------------------------------------------------------------------------------- Cable & Satellite -- 0.0%+ 49,000 UPC Financing Partnership, Facility AR, 4.4% (LIBOR + 250 bps), 1/15/26 $ 49,153 ---------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Global Multisector Income Fund | Semiannual Report | 4/30/18 41 Schedule of Investments | 4/30/18 (unaudited)(continued) ---------------------------------------------------------------------------------------------------------- Principal Amount USD ($) Value ---------------------------------------------------------------------------------------------------------- Movies & Entertainment -- 0.2% 39,902(k) Fitness International LLC, Term B Loan, 4/18/25 $ 40,087 100,000 WMG Acquisition Corp., Tranche E Term Loan, 4.15% (LIBOR + 225 bps), 11/1/23 100,590 ------------ $ 140,677 ------------ Total Media $ 340,414 ---------------------------------------------------------------------------------------------------------- PHARMACEUTICALS, BIOTECHNOLOGY & LIFE SCIENCES -- 0.2% Pharmaceuticals -- 0.2% 99,250 Endo Luxembourg Finance Co. I S.a.r.l., Initial Term Loan, 6.188% (LIBOR + 425 bps), 4/29/24 $ 98,919 48,795 RPI Finance Trust, Initial Term Loan B-6, 4.302% (LIBOR + 200 bps), 3/27/23 49,066 ------------ Total Pharmaceuticals, Biotechnology & Life Sciences $ 147,985 ---------------------------------------------------------------------------------------------------------- REAL ESTATE -- 0.2% Specialized REIT -- 0.2% 125,000 Iron Mountain, Inc., Incremental Term Loan B, 3.65% (LIBOR + 175 bps), 1/2/26 $ 124,726 ------------ Total Real Estate $ 124,726 ---------------------------------------------------------------------------------------------------------- RETAILING -- 0.4% Automotive Retail -- 0.2% 149,375 CWGS Group LLC, Term Loan, 4.641% (LIBOR + 300 bps), 11/23/23 $ 150,402 ---------------------------------------------------------------------------------------------------------- Internet & Direct Marketing Retail -- 0.1% 100,000 Shutterfly, Inc., Incremental Term Loan, 4.66% (LIBOR + 275 bps), 8/17/24 $ 101,000 ---------------------------------------------------------------------------------------------------------- Specialty Stores -- 0.1% 49,875 Staples, Inc., Closing Date Term Loan, 5.79% (LIBOR + 400 bps), 9/12/24 $ 49,450 ------------ Total Retailing $ 300,852 ---------------------------------------------------------------------------------------------------------- SEMICONDUCTORS & SEMICONDUCTOR EQUIPMENT -- 0.1% Semiconductors -- 0.1% 100,000(k) Micron Technology, Inc., Term Loan, 4/26/22 $ 100,844 ------------ Total Semiconductors & Semiconductor Equipment $ 100,844 ---------------------------------------------------------------------------------------------------------- SOFTWARE & SERVICES -- 0.7% Data Processing & Outsourced Services -- 0.1% 100,000(k) First Data Corp., 2024A New Dollar Term Loan, 4/26/24 $ 100,477 ---------------------------------------------------------------------------------------------------------- Internet Software & Services -- 0.2% 24,750 Rackspace Hosting, Inc., First Lien Term B Loan, 4.79% (LIBOR + 300 bps), 11/3/23 $ 24,723 154,000 Vantiv LLC (fka Fifth Third Processing Solutions LLC), New Term B-4 Loan, 3.9% (LIBOR + 200 bps), 8/9/24 155,155 ------------ $ 179,878 ---------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 42 Pioneer Global Multisector Income Fund | Semiannual Report | 4/30/18 ---------------------------------------------------------------------------------------------------------- Principal Amount USD ($) Value ---------------------------------------------------------------------------------------------------------- IT Consulting & Other Services -- 0.3% 24,786 Go Daddy Operating Co., LLC (GD Finance Co., Inc.), Tranche B-1 Term Loan, 4.15% (LIBOR + 225 bps), 2/15/24 $ 24,923 100,000 Rocket Software, Inc., First Lien Term Loan, 6.052% (LIBOR + 375 bps), 10/14/23 100,958 100,000(k) Tempo Acquisition LLC, Initial Term Loan, 5/1/24 100,663 ------------ $ 226,544 ---------------------------------------------------------------------------------------------------------- Systems Software -- 0.1% 5,985 MA FinanceCo., LLC (aka Micro Focus International Plc), Tranche B-3 Term Loan, 4.651% (LIBOR + 275 bps), 6/21/24 $ 5,948 43,890 Seattle Spinco, Inc. (aka Micro Focus International Plc), Initial Term Loan, 4.651% (LIBOR + 275 bps), 6/21/24 43,670 ------------ $ 49,618 ------------ Total Software & Services $ 556,517 ---------------------------------------------------------------------------------------------------------- TECHNOLOGY HARDWARE & EQUIPMENT -- 0.1% Electronic Manufacturing Services -- 0.1% 50,000(k) TTM Technologies, Inc., Term Loan B, 9/28/24 $ 50,437 ------------ Total Technology Hardware & Equipment $ 50,437 ---------------------------------------------------------------------------------------------------------- TELECOMMUNICATION SERVICE -- 0.2% Integrated Telecommunication Services -- 0.1% 99,750 CenturyLink, Inc., Initial Term B Loan, 4.65% (LIBOR + 275 bps), 1/31/25 $ 98,409 ---------------------------------------------------------------------------------------------------------- Wireless Telecommunication Services -- 0.1% 49,500 Sprint Communications, Inc., Initial Term Loan, 4.438% (LIBOR + 250 bps), 2/2/24 $ 49,686 ------------ Total Telecommunication Service $ 148,095 ---------------------------------------------------------------------------------------------------------- TOTAL SENIOR SECURED FLOATING RATE LOAN INTERESTS (Cost $4,266,792) $ 4,270,819 ---------------------------------------------------------------------------------------------------------- ---------------------------------------------------------------------------------------------------------- Number of Strike Expiration Contracts Description Counterparty Notional Price Date Value ---------------------------------------------------------------------------------------------------------- CURRENCY PUT OPTION PURCHASED -- 0.0%+ 2,004,000 Put EUR Goldman Call USD Sachs International EUR 18,058 EUR 1.21 6/1/18 $ 17,531 ---------------------------------------------------------------------------------------------------------- TOTAL CURRENCY PUT OPTION PURCHASED (Premiums paid $18,058) $ 17,531 ---------------------------------------------------------------------------------------------------------- TOTAL INVESTMENTS IN UNAFFILIATED ISSUERS -- 100.0% (Cost $81,612,247) $ 81,157,833 ---------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Global Multisector Income Fund | Semiannual Report | 4/30/18 43 Schedule of Investments | 4/30/18 (unaudited)(continued) ---------------------------------------------------------------------------------------------------------- Net Change in Net Realized Unrealized Dividend Gain Appreciation Shares Income (Loss) (Depreciation) Value ---------------------------------------------------------------------------------------------------------- AFFILIATED ISSUER -- 1.0% CLOSED-END FUND -- 1.0% of Net Assets INSURANCE -- 1.0% Property & Casualty Insurance -- 1.0% 84,921 Pioneer ILS Interval Fund(l) $9,913 $ -- $618 $ 815,246 ------------ Total Insurance $ 815,246 ---------------------------------------------------------------------------------------------------------- TOTAL CLOSED-END FUND (Cost $872,994) $ 815,246 ---------------------------------------------------------------------------------------------------------- TOTAL INVESTMENTS IN AFFILIATED ISSUER -- 1.0% (Cost $872,994) $ 815,246 ---------------------------------------------------------------------------------------------------------- ---------------------------------------------------------------------------------------------------------- Number of Strike Expiration Contracts Description Counterparty Notional Price Date Value ---------------------------------------------------------------------------------------------------------- CURRENCY PUT OPTION WRITTEN -- 0.0%+ (2,004,000) Put EUR Goldman Call USD Sachs International EUR 8,574 EUR 1.19 6/1/18 $ (5,240) ---------------------------------------------------------------------------------------------------------- TOTAL CURRENCY PUT OPTION WRITTEN (Premiums received $(8,574)) $ (5,240) ---------------------------------------------------------------------------------------------------------- OTHER ASSETS AND LIABILITIES -- (1.0)% $ (824,625) ---------------------------------------------------------------------------------------------------------- NET ASSETS -- 100.0% $ 81,143,214 ========================================================================================================== bps Basis Point. FREMF Freddie Mac Multifamily Fixed-Rate Mortgage Loans. LIBOR London Interbank Offered Rate. PRIME U.S. Federal Funds Rate. CMT Constant Maturity Index. EURIBOR Euro Interbank Offer Rate. REIT Real Estate Investment Trust. REMICS Real Estate Mortgage Investment Conduits. (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 April 30, 2018, the value of these securities amounted to $14,690,102, or 18.1% of net assets. (TBA) "To Be Announced" Securities. + Amount rounds to less than 0.1%. The accompanying notes are an integral part of these financial statements. 44 Pioneer Global Multisector Income Fund | Semiannual Report | 4/30/18 * Senior secured 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, (ii) the prime rate offered by one or more major United States banks, (iii) the rate of a certificate of deposit or (iv) other base lending rates used by commercial lenders. The interest rate shown is the rate accruing at April 30, 2018. + Securities that used significant unobservable inputs to determine their value. (a) Debt obligation initially issued at one coupon which converts to a higher coupon at a specific date. The rate shown is the rate at April 30, 2018. (b) The interest rate is subject to change periodically. The interest rate and/or reference index and spread shown at April 30, 2018. (c) Security is perpetual in nature and has no stated maturity date. (d) Floating rate note. Coupon rate, reference index and spread shown at April 30, 2018. (e) Security represents the interest-only portion payments on a pool of underlying mortgages or mortgage-backed securities. (f) Structured reinsurance investment. At April 30, 2018, the value of these securities amounted to $226,032, or 0.3% of net assets. See Notes to Financial Statements -- Note 1I. (g) Rate to be determined. (h) Security issued with a zero coupon. Income is recognized through accretion of discount. (i) Consists of Revenue Bonds unless otherwise indicated. (j) Represents a General Obligation Bond. (k) This term loan will settle after April 30, 2018, at which time the interest rate will be determined. (l) Pioneer ILS Interval Fund is an affiliated fund managed by Amundi Pioneer Asset Management, Inc., formerly Pioneer Investment Management, Inc. (the "Adviser"). The accompanying notes are an integral part of these financial statements. Pioneer Global Multisector Income Fund | Semiannual Report | 4/30/18 45 Schedule of Investments | 4/30/18 (unaudited)(continued) FORWARD FOREIGN CURRENCY CONTRACTS --------------------------------------------------------------------------------------------------------------- Net Unrealized Currency Currency Settlement Appreciation Purchased In Exchange for Sold Deliver Counterparty Date (Depreciation) --------------------------------------------------------------------------------------------------------------- NOK 4,604,113 USD (578,286) Bank of New York 5/31/18 $ (3,215) SEK 3,329,851 USD (410,629) Bank of New York 6/19/18 (28,968) USD 160,532 NZD (222,821) Bank of New York 5/31/18 3,752 SEK 6,619,464 EUR (658,151) Brown Brothers 6/19/18 (39,392) Harriman & Co. USD 2,528,213 NZD (3,495,000) Brown Brothers 6/29/18 69,086 Harriman & Co. JPY 244,150,000 USD (2,312,870) Citibank NA 5/31/18 (74,324) ARS 1,604,742 USD (76,035) Goldman Sachs 6/29/18 (1,550) International SEK 8,650,563 EUR (817,678) Goldman Sachs 6/01/18 (57) International USD 3,801,360 KRW (4,089,094,021) Goldman Sachs 6/29/18 (23,613) International USD 321,462 MXN (6,102,000) Goldman Sachs 5/16/18 (3,863) International CHF 82,617 USD (87,001) JP Morgan Chase 6/29/18 (3,159) Bank NA EUR 7,918,087 USD (9,607,157) JP Morgan Chase 5/31/18 (20,248) Bank NA IDR 9,231,298,480 USD (658,297) JP Morgan Chase 6/29/18 1,009 Bank NA JPY 442,795,084 USD (4,162,872) JP Morgan Chase 5/31/18 (103,003) Bank NA SEK 8,650,563 EUR (862,272) JP Morgan Chase 5/02/18 (53,978) Bank NA USD 332,881 INR (22,302,702) JP Morgan Chase 6/29/18 (734) Bank NA USD 379,293 SEK (3,293,131) JP Morgan Chase 6/29/18 1,527 Bank NA USD 145,303 TRY (592,621) JP Morgan Chase 5/31/18 865 Bank NA CAD 278,040 USD (216,749) State Street Bank 6/29/18 121 & Trust Co. CHF 524,999 EUR (445,915) State Street Bank 6/01/18 (8,530) & Trust Co. CZK 12,685,636 USD (601,510) State Street Bank 6/29/18 (764) & Trust Co. USD 3,936,362 AUD (5,218,790) State Street Bank 6/29/18 5,843 & Trust Co. USD 979,098 GBP (710,447) State Street Bank 6/29/18 (576) & Trust Co. USD 193,695 MXN (3,665,514) State Street Bank 5/16/18 (1,730) & Trust Co. --------------------------------------------------------------------------------------------------------------- TOTAL FORWARD FOREIGN CURRENCY CONTRACTS $(285,501) =============================================================================================================== The accompanying notes are an integral part of these financial statements. 46 Pioneer Global Multisector Income Fund | Semiannual Report | 4/30/18 FUTURES CONTRACTS FIXED INCOME INDEX FUTURES CONTRACTS -------------------------------------------------------------------------------------------- Number of Net Unrealized Contracts Expiration Notional Market Appreciation Long Description Date Amount Value (Depreciation) -------------------------------------------------------------------------------------------- 5 EURO-BUXL 6/7/18 $ 969,621 $ 987,863 $18,242 30-Year Bund 9 Long Gilt 6/27/18 1,495,959 1,512,913 16,953 25 Short Gilt 6/27/18 3,560,433 3,561,120 688 8 U.S. 2 Year 6/29/18 1,700,000 1,696,375 (3,625) Note (CBT) -------------------------------------------------------------------------------------------- $7,726,013 $7,758,271 $32,258 ============================================================================================ -------------------------------------------------------------------------------------------- Number of Net Unrealized Contracts Expiration Notional Market Appreciation Short Description Date Amount Value (Depreciation) -------------------------------------------------------------------------------------------- 22 EURO-BOBL 6/7/18 $ 3,466,329 $ 3,481,744 $(15,415) 14 U.S. 5 Year Note (CBT) 6/29/18 1,597,968 1,589,109 8,859 52 U.S. 10-Year Note (CBT) 6/20/18 6,242,894 6,220,500 22,394 3 U.S. 10-Year Ultra (CBT) 6/20/18 384,516 383,672 844 2 U.S. Long Bond (CBT) 6/20/18 286,484 287,687 (1,203) 3 U.S. Ultra Bond (CBT) 6/20/18 476,072 471,375 4,697 -------------------------------------------------------------------------------------------- $12,454,263 $12,434,087 $ 20,176 -------------------------------------------------------------------------------------------- TOTAL FUTURES CONTRACTS $(4,728,250) $(4,675,816) $ 52,434 ============================================================================================ SWAP CONTRACTS CENTRALLY CLEARED CREDIT DEFAULT SWAP CONTRACT - SELL PROTECTION ---------------------------------------------------------------------------------------------------------------- Obligation Annual Notional Reference/ Pay/ Fixed Expiration Premiums Unrealized Market Amount ($)(1) Index Receive(2) Rate Date Paid Appreciation Value ---------------------------------------------------------------------------------------------------------------- 331,591 Markit CDX North Receive 5.00% 12/20/22 $23,875 $2,133 $26,008 America High Yield Index Series 29 ---------------------------------------------------------------------------------------------------------------- OVER THE COUNTER (OTC) CREDIT DEFAULT SWAP CONTRACT - SELL PROTECTION ---------------------------------------------------------------------------------------------------------------- Obligation Annual Notional Reference/ Pay/ Fixed Expiration Premiums Unrealized Market Amount ($)(1) Counterparty Index Receive(2) Rate Date (Received) Appreciation Value ---------------------------------------------------------------------------------------------------------------- 50,000 Morgan Stanley Diamond Capital Offshore Services LLC Drilling, Inc. Receive 1.00% 12/20/19 $(1,873) $2,384 $ 511 ---------------------------------------------------------------------------------------------------------------- TOTAL SWAP CONTRACTS $22,002 $4,517 $26,519 ================================================================================================================ (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. (2) Receives Quarterly. The accompanying notes are an integral part of these financial statements. Pioneer Global Multisector Income Fund | Semiannual Report | 4/30/18 47 Schedule of Investments | 4/30/18 (unaudited)(continued) Principal amounts are denominated in U.S. dollars unless otherwise noted. ARS Argentine Peso AUD Australian Dollar BRL Brazilian Real CAD Canadian Dollar CHF Swiss Franc CZK Czech Koruna DOP Dominican Peso EGP Egyptian Pound EUR Euro GBP Great British Pound IDR Indonesian Rupiah INR Indian Rupee JPY Japanese Yen KRW South Korea Won MXN Mexican Peso NOK Norwegian Krone NZD New Zealand Dollar SEK Swedish Krona TRY Turkish Lira UYU Uruguayan Peso Purchases and sales of securities (excluding temporary cash investments) for the six months ended April 30, 2018, were as follows: -------------------------------------------------------------------------------- Purchases Sales -------------------------------------------------------------------------------- Long-Term U.S. Government Securities $ 1,862,989 $1,250,544 Other Long-term Securities $34,297,088 $5,064,329 The Fund is permitted to engage in purchase and sale transactions ("cross trades") with certain funds and accounts for which the Adviser serves as the Fund's 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 affected at current market prices. During the six months ended April 30, 2018, the Fund did not engage in cross trade activity. At April 30, 2018, the net unrealized depreciation on investments based on cost for federal tax purposes of $82,595,781 was as follows: Aggregate gross unrealized appreciation for all investments in which there is an excess of value over tax cost $ 1,666,178 Aggregate gross unrealized depreciation for all investments in which there is an excess of tax cost over value (2,500,668) ----------- Net unrealized depreciation $ (834,490) =========== Various inputs are used in determining the value of the Fund's investments. These inputs are summarized in the three broad levels 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 risks, 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). The accompanying notes are an integral part of these financial statements. 48 Pioneer Global Multisector Income Fund | Semiannual Report | 4/30/18 The following is a summary of the inputs used as of April 30, 2018, in valuing the Fund's investments. ------------------------------------------------------------------------------------------- Level 1 Level 2 Level 3 Total ------------------------------------------------------------------------------------------- Convertible Corporate Bond $ -- $ 32,860 $ -- $ 32,860 Preferred Stock 6,143 -- -- 6,143 Convertible Preferred Stocks 828,612 -- -- 828,612 Asset Backed Securities -- 365,499 -- 365,499 Collateralized Mortgage Obligations -- 3,777,171 -- 3,777,171 Corporate Bonds Insurance Reinsurance -- 145,752 80,280 226,032 All Other Corporate Bonds -- 25,525,114 -- 25,525,114 Supranational Bonds -- 543,139 -- 543,139 U.S. Government and Agency Obligations -- 15,627,435 -- 15,627,435 Foreign Government Bonds -- 29,198,106 -- 29,198,106 Municipal Bonds -- 739,372 -- 739,372 Senior Secured Floating Rate Loan Interests -- 4,270,819 -- 4,270,819 Currency Put Option Purchased -- 17,531 -- 17,531 Closed-End Fund -- 815,246 -- 815,246 ------------------------------------------------------------------------------------------- Total Investments in Securities $834,755 $81,058,044 $80,280 $81,973,079 =========================================================================================== Other Financial Instruments Currency Put Option Written $ -- $ (5,240) $ -- $ (5,240) Net unrealized depreciation on forward foreign currency contracts -- (285,501) -- (285,501) Net unrealized appreciation on futures contracts 52,434 -- -- 52,434 Swap contracts, at value -- 26,519 -- 26,519 ------------------------------------------------------------------------------------------- Total Other Financial Instruments $ 52,434 $ (264,222) $ -- $ (211,788) =========================================================================================== The accompanying notes are an integral part of these financial statements. Pioneer Global Multisector Income Fund | Semiannual Report | 4/30/18 49 Schedule of Investments | 4/30/18 (unaudited)(continued) The following is a reconciliation of assets valued using significant unobservable inputs (Level 3): -------------------------------------------------------------------------------- Corporate Bonds -------------------------------------------------------------------------------- Balance as of 10/31/17 $103,022 Accrued discounts/premiums (3,000) Realized gain (loss)(1) (2,350) Purchases 50,000 Sales (67,392) Transfer in to Level 3* -- Transfer out of Level 3* -- -------------------------------------------------------------------------------- Balance as of 04/30/18 $ 80,280 ================================================================================ (1) Realized gain (loss) on these securities is included in net realized gain (loss) on investments on the Statement of Operations. * Transfers are calculated on the beginning of period values. A security valued at $699,686 transferred from Level 1 to Level 2 due to the nature of the security's liquidity. During the six months ended April 30, 2018, there were no transfers between Levels 2 and 3. Net change in unrealized appreciation (depreciation) of Level 3 investments still held and considered Level 3 at April 30, 2018: $(2,290) ------- The accompanying notes are an integral part of these financial statements. 50 Pioneer Global Multisector Income Fund | Semiannual Report | 4/30/18 Statement of Assets and Liabilities | 4/30/18 (unaudited) ASSETS: Investments in unaffiliated securities, at value (cost $81,612,247) $81,157,833 Investments in affiliated securities, at value (cost $872,994) 815,246 Cash 5,834,488 Swap contracts, at value (net premiums paid $22,002) 26,519 Swaps collateral 25,188 Futures collateral 161,550 Net unrealized appreciation on futures contracts 52,434 Unrealized appreciation on unfunded loan commitment 72 Receivables -- Investment securities sold 1,561 Fund shares sold 54,347 Interest 634,578 Due from the Adviser 35,631 Other assets 28,320 ----------------------------------------------------------------------------------- Total assets $88,827,767 =================================================================================== LIABILITIES: Due to Custodian $ 367,160 Payables -- Investment securities purchased 6,660,957 Fund shares repurchased 71,412 Distributions 42,768 Trustees' fees 616 Due to broker for futures 52,580 Due to broker for swaps 26,065 Variation margin for futures contracts 7,973 Variation margin for centrally cleared swap contracts 77 Written options outstanding (net premiums received $(8,574)) 5,240 Net unrealized depreciation on forward foreign currency contracts 285,501 Due to affiliates 40,246 Accrued expenses 123,958 ----------------------------------------------------------------------------------- Total liabilities $ 7,684,553 =================================================================================== NET ASSETS: Paid-in capital $81,815,057 Distributions in excess of net investment income (85,679) Accumulated net realized gain on investments 227,984 Net unrealized depreciation on investments (814,148) ----------------------------------------------------------------------------------- Net assets $81,143,214 =================================================================================== NET ASSET VALUE PER SHARE: No par value (unlimited number of shares authorized) Class A (based on $28,739,872/2,723,638 shares) $ 10.55 Class C (based on $9,778,716/924,226 shares) $ 10.58 Class Y (based on $42,624,626/4,009,903 shares) $ 10.63 MAXIMUM OFFERING PRICE: Class A ($10.55 (divided by) 95.5%) $ 11.05 =================================================================================== The accompanying notes are an integral part of these financial statements. Pioneer Global Multisector Income Fund | Semiannual Report | 4/30/18 51 Statement of Operations (unaudited) For the Six Months Ended 4/30/18 INVESTMENT INCOME: Interest from unaffiliated issuers (net of foreign taxes withheld $18,122) $ 1,062,897 Dividends from unaffiliated issuers 11,440 Dividends from affiliated issuers 9,913 ------------------------------------------------------------------------------------------------ Total investment income $ 1,084,250 ------------------------------------------------------------------------------------------------ EXPENSES: Management fees $ 159,954 Administrative expense 30,430 Transfer agent fees Class A 79,481 Class C 2,038 Class Y 2,531 Distribution fees Class A 33,512 Class C 50,252 Shareholder communications expense 2,700 Custodian fees 39,521 Registration fees 24,000 Professional fees 24,668 Printing expense 24,351 Pricing fees 23,427 Trustees' fees 3,573 Miscellaneous 24,086 ------------------------------------------------------------------------------------------------ Total expenses $ 524,524 Less fees waived and expenses reimbursed by the Adviser (186,665) ------------------------------------------------------------------------------------------------ Net expenses $ 337,859 ------------------------------------------------------------------------------------------------ Net investment income $ 746,391 ------------------------------------------------------------------------------------------------ REALIZED AND UNREALIZED GAIN (LOSS) ON INVESTMENTS: Net realized gain (loss) on: Investments in unaffiliated issuers $ 50,330 Futures contracts 197,350 Swap contracts 5,679 Forward foreign currency contracts (34,554) Other assets and liabilities denominated in foreign currencies 91,444 $ 310,249 ------------------------------------------------------------------------------------------------ Change in net unrealized appreciation (depreciation) on: Investments in unaffiliated issuers $(1,391,774) Investments in affiliated issuers 618 Written options 3,334 Futures contracts (29,831) Swap contracts (3,499) Unfunded loan commitment 72 Forward foreign currency contracts (261,526) Other assets and liabilities denominated in foreign currencies (69,960) $(1,752,566) ------------------------------------------------------------------------------------------------ Net realized and unrealized gain (loss) on investments $(1,442,317) ------------------------------------------------------------------------------------------------ Net decrease in net assets resulting from operations $ (695,926) ================================================================================================ The accompanying notes are an integral part of these financial statements. 52 Pioneer Global Multisector Income Fund | Semiannual Report | 4/30/18 Statements of Changes in Net Assets ---------------------------------------------------------------------------------------- Six Months Ended 4/30/18 Year Ended (unaudited) 10/31/17 ---------------------------------------------------------------------------------------- FROM OPERATIONS: Net investment income (loss) $ 746,391 $ 1,240,195 Net realized gain (loss) on investments 310,249 (167,429) Change in net unrealized appreciation (depreciation) on investments (1,752,566) 1,013,395 ---------------------------------------------------------------------------------------- Net increase (decrease) in net assets resulting from operations $ (695,926) $ 2,086,161 ---------------------------------------------------------------------------------------- DISTRIBUTIONS TO SHAREOWNERS: Net investment income: Class A ($0.13 and $0.19 per share, respectively) $ (318,537) $ (379,152) Class C ($0.08 and $0.10 per share, respectively) (79,430) (77,730) Class Y ($0.14 and $0.22 per share, respectively) (372,242) (311,287) Tax return of capital: Class A ($-- and $0.04 per share, respectively) -- (83,787) Class C ($-- and $0.04 per share, respectively) -- (34,110) Class Y ($-- and $0.04 per share, respectively) -- (58,205) Net realized gain: Class A ($-- and $0.06 per share, respectively) -- (124,161) Class C ($-- and $0.06 per share, respectively) -- (52,182) Class Y ($-- and $0.06 per share, respectively) -- (82,869) ---------------------------------------------------------------------------------------- Total distributions to shareowners $ (770,209) $ (1,203,483) ---------------------------------------------------------------------------------------- FROM FUND SHARE TRANSACTIONS: Net proceeds from sales of shares $ 69,792,546 $ 32,624,032 Reinvestment of distributions 411,974 425,141 Cost of shares repurchased (35,515,972) (14,727,405) ---------------------------------------------------------------------------------------- Net increase in net assets from Fund share transactions $ 34,688,548 $ 18,321,768 ---------------------------------------------------------------------------------------- Net increase in net assets $ 33,222,413 $ 19,204,446 NET ASSETS: Beginning of period $ 47,920,801 $ 28,716,355 ---------------------------------------------------------------------------------------- End of period $ 81,143,214 $ 47,920,801 ---------------------------------------------------------------------------------------- Distributions in excess of net investment income $ (85,679) $ (61,861) ======================================================================================== The accompanying notes are an integral part of these financial statements. Pioneer Global Multisector Income Fund | Semiannual Report | 4/30/18 53 Statements of Changes in Net Assets (continued) ------------------------------------------------------------------------------------ Six Months Six Months Ended Ended 4/30/18 4/30/18 Year Ended Year Ended Shares Amount 10/31/17 10/31/17 (unaudited) (unaudited) Shares Amount ------------------------------------------------------------------------------------ Class A Shares sold 1,736,383 $ 18,616,287 1,332,849 $13,903,813 Reinvestment of distributions 16,287 174,847 30,403 321,073 Less shares repurchased (1,202,381) (12,860,548) (471,394) (4,975,818) ------------------------------------------------------------------------------------ Net increase 550,289 $ 5,930,586 891,858 $ 9,249,068 ==================================================================================== Class C Shares sold 754,891 $ 8,100,627 621,101 $ 6,507,819 Reinvestment of distributions 2,424 26,130 5,130 54,428 Less shares repurchased (767,190) (8,227,641) (103,349) (1,099,330) ------------------------------------------------------------------------------------ Net increase (decrease) (9,875) $ (100,884) 522,882 $ 5,462,917 ==================================================================================== Class Y Shares sold 3,970,486 $ 43,075,632 1,159,480 $12,212,400 Reinvestment of distributions 19,551 210,997 4,636 49,640 Less shares repurchased (1,336,303) (14,427,783) (815,102) (8,652,257) ------------------------------------------------------------------------------------ Net increase 2,653,734 $ 28,858,846 349,014 $ 3,609,783 ==================================================================================== The accompanying notes are an integral part of these financial statements. 54 Pioneer Global Multisector Income Fund | Semiannual Report | 4/30/18 Financial Highlights ------------------------------------------------------------------------------------------------------------------------------ Six Months Ended Year Year Year Year Year 4/30/18 Ended Ended Ended Ended Ended (unaudited) 10/31/17 10/31/16* 10/31/15* 10/31/14* 10/31/13 ------------------------------------------------------------------------------------------------------------------------------ Class A Net asset value, beginning of period $ 10.70 $ 10.60 $ 10.40 $ 10.91 $ 10.98 $ 11.49 ------------------------------------------------------------------------------------------------------------------------------ Increase (decrease) from investment operations: Net investment income (loss) $ 0.12(a) $ 0.30(a) $ 0.31(a) $ 0.31(a) $ 0.38 $ 0.30 Net realized and unrealized gain (loss) on investments (0.14) 0.09 0.25 (0.41) (0.04) (0.35) ------------------------------------------------------------------------------------------------------------------------------ Net increase (decrease) from investment operations $ (0.02) $ 0.39 $ 0.56 $ (0.10) $ 0.34 $ (0.05) ------------------------------------------------------------------------------------------------------------------------------ Distributions to shareowners: Net investment income $ (0.13) $ (0.19) $ (0.28) $ (0.31) $ (0.35) $ (0.29) Net realized gain -- (0.06) -- (0.10) (0.06) (0.17) Tax return of capital -- (0.04) (0.08) -- -- -- ------------------------------------------------------------------------------------------------------------------------------ Total distributions $ (0.13) $ (0.29) $ (0.36) $ (0.41) $ (0.41) $ (0.46) ------------------------------------------------------------------------------------------------------------------------------ Net increase (decrease) in net asset value $ (0.15) $ 0.10 $ 0.20 $ (0.51) $ (0.07) $ (0.51) ------------------------------------------------------------------------------------------------------------------------------ Net asset value, end of period $ 10.55 $ 10.70 $ 10.60 $ 10.40 $ 10.91 $ 10.98 ============================================================================================================================== Total return (b) (0.21)%(c) 3.75% 5.59% (1.00)% 3.16% (0.45)% Ratio of net expenses to average net assets (d) 1.00%(e) 1.00% 1.00% 1.00% 1.01% 1.00% Ratio of net investment income (loss) to average net assets 2.33%(e) 2.83% 2.99% 2.87% 3.57% 3.36% Portfolio turnover rate 11%(c) 70% 37% 34% 51% 33% Net assets, end of period (in thousands) $28,740 $23,252 $13,579 $12,737 $11,601 $ 6,888 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 (d) 1.92%(e) 2.13% 2.67% 2.67% 2.52% 2.05% Net investment income (loss) to average net assets 1.41%(e) 1.70% 1.32% 1.20% 2.06% 2.31% ============================================================================================================================== * The Fund was audited by an 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) 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. (c) Not annualized. (d) Includes interest expense of 0.00%, 0.00%, 0.00%, 0.00%, 0.00% and 0.01%, respectively. (e) Annualized. The accompanying notes are an integral part of these financial statements. Pioneer Global Multisector Income Fund | Semiannual Report | 4/30/18 55 Financial Highlights (continued) ---------------------------------------------------------------------------------------------------------------------------------- Six Months Ended Year Year Year Year Year 4/30/18 Ended Ended Ended Ended Ended (unaudited) 10/31/17 10/31/16* 10/31/15* 10/31/14* 10/31/13 ---------------------------------------------------------------------------------------------------------------------------------- Class C Net asset value, beginning of period $10.73 $ 10.63 $10.43 $10.94 $11.01 $11.51 ---------------------------------------------------------------------------------------------------------------------------------- Increase (decrease) from investment operations: Net investment income (loss) $ 0.08(a) $ 0.21(a) $ 0.22(a) $ 0.21(a) $ 0.29 $ 0.20 Net realized and unrealized gain (loss) on investments (0.15) 0.09 0.25 (0.41) (0.05) (0.34) ---------------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) from investment operations $(0.07) $ 0.30 $ 0.47 $(0.20) $ 0.24 $(0.14) ---------------------------------------------------------------------------------------------------------------------------------- Distributions to shareowners: Net investment income $(0.08) $ (0.10) $(0.19) $(0.21) $(0.25) $(0.19) Net realized gain -- (0.06) -- (0.10) (0.06) (0.17) Tax return of capital -- (0.04) (0.08) -- -- -- ---------------------------------------------------------------------------------------------------------------------------------- Total distributions $(0.08) $ (0.20) $(0.27) $(0.31) $(0.31) $(0.36) ---------------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) in net asset value $(0.15) $ 0.10 $ 0.20 $(0.51) $(0.07) $(0.50) ---------------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $10.58 $ 10.73 $10.63 $10.43 $10.94 $11.01 ================================================================================================================================== Total return (b) (0.62)%(c) 2.88% 4.67% (1.87)% 2.24% (1.24)% Ratio of net expenses to average net assets (d) 1.83%(e) 1.81% 1.90% 1.90% 1.91% 1.90% Ratio of net investment income (loss) to average net assets 1.55%(e) 2.00% 2.10% 1.96% 2.67% 2.46% Portfolio turnover rate 11%(c) 70% 37% 34% 51% 33% Net assets, end of period (in thousands) $9,779 $10,024 $4,370 $4,113 $4,156 $3,847 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 (d) 2.13%(e) 2.21% 2.53% 2.56% 2.71% 2.75% Net investment income (loss) to average net assets 1.25%(e) 1.60% 1.46% 1.30% 1.87% 1.61% ================================================================================================================================== * The Fund was audited by an 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) 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. (c) Not annualized. (d) Includes interest expense of 0.00%, 0.00%, 0.00%, 0.00%, 0.00% and 0.01%, respectively. (e) Annualized. The accompanying notes are an integral part of these financial statements. 56 Pioneer Global Multisector Income Fund | Semiannual Report | 4/30/18 ------------------------------------------------------------------------------------------------------------------------------ Six Months Ended Year Year Year Year Year 4/30/18 Ended Ended Ended Ended Ended (unaudited) 10/31/17 10/31/16* 10/31/15* 10/31/14* 10/31/13 ------------------------------------------------------------------------------------------------------------------------------ Class Y Net asset value, beginning of period $ 10.80 $ 10.69 $ 10.50 $ 11.00 $ 11.07 $ 11.59 ------------------------------------------------------------------------------------------------------------------------------ Increase (decrease) from investment operations: Net investment income (loss) $ 0.13(a) $ 0.33(a) $ 0.34(a) $ 0.33(a) $ 0.42 $ 0.33 Net realized and unrealized gain (loss) on investments (0.16) 0.10 0.24 (0.39) (0.05) (0.36) ------------------------------------------------------------------------------------------------------------------------------ Net increase (decrease) from investment operations $ (0.03) $ 0.43 $ 0.58 $ (0.06) $ 0.37 $ (0.03) ------------------------------------------------------------------------------------------------------------------------------ Distributions to shareowners: Net investment income $ (0.14) $ (0.22) $ (0.31) $ (0.34) $ (0.38) $ (0.32) Net realized gain -- (0.06) -- (0.10) (0.06) (0.17) Tax return of capital -- (0.04) (0.08) -- -- -- ------------------------------------------------------------------------------------------------------------------------------ Total distributions $ (0.14) $ (0.32) $ (0.39) $ (0.44) $ (0.44) $ (0.49) ------------------------------------------------------------------------------------------------------------------------------ Net increase (decrease) in net asset value $ (0.17) $ 0.11 $ 0.19 $ (0.50) $ (0.07) $ (0.52) ------------------------------------------------------------------------------------------------------------------------------ Net asset value, end of period $ 10.63 $ 10.80 $ 10.69 $ 10.50 $ 11.00 $ 11.07 ============================================================================================================================== Total return(b) (0.26)%(c) 4.10% 5.73% (0.62)% 3.42% (0.25)% Ratio of net expenses to average net assets (d) 0.75%(e) 0.75% 0.75% 0.75% 0.76% 0.75% Ratio of net investment income (loss) to average net assets 2.47%(e) 3.10% 3.24% 3.12% 3.81% 3.58% Portfolio turnover rate 11%(c) 70% 37% 34% 51% 33% Net assets, end of period (in thousands) $42,625 $14,645 $10,767 $12,178 $12,525 $17,438 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 (d) 1.07%(e) 1.17% 1.41% 1.39% 1.50% 1.57% Net investment income (loss) to average net assets 2.15%(e) 2.68% 2.59% 2.48% 3.07% 2.76% ============================================================================================================================== * The Fund was audited by an 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) 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. (c) Not annualized. (d) Includes interest expense of 0.00%, 0.00%, 0.00%, 0.00%, 0.00% and 0.01%, respectively. (e) Annualized. The accompanying notes are an integral part of these financial statements. Pioneer Global Multisector Income Fund | Semiannual Report | 4/30/18 57 Notes to Financial Statements | 4/30/18 (unaudited) 1. Organization and Significant Accounting Policies Pioneer Global Multisector Income Fund (the "Fund") is a series of Pioneer Series Trust VII, 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 provide a high level of current income. The Fund offers five classes of shares designated as Class A, Class C, Class K, Class T and Class Y shares. Class K and Class T shares had not commenced operations as of April 30, 2018. 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 shareowner approval. Under per-share voting, each share of a class of the Fund is entitled to one vote. Under dollar-weighted voting, a shareowner'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"). In October 2016, the Securities and Exchange Commission ("SEC") released its Final Rule on Investment Company Reporting Modernization. In addition 58 Pioneer Global Multisector Income Fund | Semiannual Report | 4/30/18 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. 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. 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. Pioneer Global Multisector Income Fund | Semiannual Report | 4/30/18 59 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 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. Event-linked bonds or catastrophe bonds are valued at the bid price obtained from an independent third party pricing service. Other insurance-linked securities (including sidecars, collateralized reinsurance and industry loss warranties) may be valued at the bid price obtained from an independent pricing service, or through a third party using a pricing matrix, insurance industry valuation models, or other fair value methods or techniques to provide an estimated value of the instrument. 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. Forward foreign currency exchange contracts are valued daily using the foreign exchange rate or, for longer term forward contract positions, the spot currency rate and the forward points on a daily basis, in each case provided by a third party pricing service. Contracts whose forward settlement date falls between two quoted days are valued by interpolation. 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. Options contracts are generally valued at the mean between the last bid and ask prices on the principal exchange where they are traded. Over-the-counter ("OTC") options and options on swaps ("swaptions") are valued using prices supplied by independent pricing services, which consider such factors as market prices, market events, quotations from one or more brokers, Treasury 60 Pioneer Global Multisector Income Fund | Semiannual Report | 4/30/18 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. Futures contracts are generally valued at the closing settlement price established by the exchange on which they are traded. 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 April 30, 2018, no securities were valued using fair value methods (other than securities valued using prices supplied by independent pricing services, broker-dealers or using a third party insurance industry pricing model). 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. Dividend and interest income are reported net of unrecoverable foreign taxes withheld at the applicable country rates and net of income accrued on defaulted securities. 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. Pioneer Global Multisector Income Fund | Semiannual Report | 4/30/18 61 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. 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. 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 on the Statement of Operations from the effects of changes in the market prices of those securities, but are included with the net realized and unrealized gain or loss on investments. D. Forward Foreign Currency Contracts The Fund may enter into forward foreign currency contracts ("contracts") for the purchase or sale of a specific foreign currency at a fixed price on a future date. All contracts are marked to market daily at the applicable exchange rates, and any resulting unrealized appreciation or depreciation is recorded in the Fund's financial statements. The Fund records realized gains and losses at the time a contract is offset by entry into a closing transaction or extinguished by delivery of the currency. Risks may arise upon entering into these contracts from the potential inability of counterparties to meet the terms of the contract and from unanticipated movements in the value of foreign currencies relative to the U.S. dollar (see Note 6). At April 30, 2018, the Fund had entered into various forward foreign currency contracts that obligate the Fund to deliver or take delivery of currencies at specified future maturity dates. Alternatively, prior to the settlement date of a forward foreign currency contract, the Fund may close out such contract by entering into an offsetting contract. The average notional value of forward foreign currency contracts open during the six months ended April 30, 2018, was $34,324,959. 62 Pioneer Global Multisector Income Fund | Semiannual Report | 4/30/18 Forward foreign currency contracts outstanding at April 30, 2018, are listed in the Schedule of Investments. E. 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 provision for federal income taxes is required. As of October 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 on 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 over distributions 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. The tax character of current year distributions paid will be determined at the end of the current taxable year. The tax character of distributions paid during the year ended October 31, 2017 was as follows: --------------------------------------------------------------------------- 2017 --------------------------------------------------------------------------- Distributions paid from: Ordinary income $ 881,209 Long-term capital gain 146,172 Return of capital 176,102 --------------------------------------------------------------------------- Total $1,203,483 =========================================================================== The following shows the components of distributable earnings on a federal income tax basis at October 31, 2017: --------------------------------------------------------------------------- 2017 --------------------------------------------------------------------------- Distributable earnings: Current year dividend payable $(71,961) Unrealized depreciation 866,253 --------------------------------------------------------------------------- Total $794,292 =========================================================================== Pioneer Global Multisector Income Fund | Semiannual Report | 4/30/18 63 The difference between book-basis and tax-basis net unrealized depreciation is attributable to the adjustments related to sidecars, the mark-to-market of forward, swaps and futures contracts, and interest accruals on preferred stock. F. Fund Shares The Fund records sales and repurchases of its shares as of trade date. The Distributor earned $623 in underwriting commissions on the sale of Class A shares during the six months ended April 30, 2018. G. 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. H. 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's investments in 64 Pioneer Global Multisector Income Fund | Semiannual Report | 4/30/18 foreign markets and countries with limited developing markets may subject the Fund to a greater degree of risk than investments in a developed market. These risks include disruptive political or economic conditions and the imposition of adverse governmental laws or currency exchange restrictions. 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 could adversely affect the price and liquidity of fixed-income securities and could also result in increased redemptions from the Fund. 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. With the increased use of technologies such as the Internet to conduct business, the Fund is susceptible to operational, information security and related risks. While the Fund's Adviser has established business continuity plans in the event of, and risk management systems to prevent, limit or mitigate, such cyber-attacks, there are inherent limitations in such plans and systems including the possibility that certain risks have not been identified. Furthermore, the Fund cannot control the cybersecurity plans and systems put in place by service providers to the Fund such as Brown Brothers Harriman & Co., the Fund's custodian and accounting agent, and DST Asset Manager Solutions, Inc., the Fund's transfer agent. In addition, many beneficial owners of Fund shares hold them through accounts at broker- dealers, retirement platforms and other financial market participants over which neither the Fund nor Amundi Pioneer exercises control. Each of these may in turn rely on service providers to them, which are also subject to the risk of cyber-attacks. Cybersecurity failures or breaches at Amundi Pioneer or the Fund's service providers or intermediaries have the ability to cause disruptions and impact business operations potentially resulting in financial losses, interference with the Fund's ability to calculate its net asset value, impediments to trading, the inability of Fund shareowners to effect share purchases, redemptions or exchanges or receive distributions, loss of or unauthorized access to private shareowners information and violations of applicable privacy and other laws, regulatory fines, penalties, reputational damage, or additional compliance costs. Such costs and losses may not be Pioneer Global Multisector Income Fund | Semiannual Report | 4/30/18 65 covered under any insurance. In addition, maintaining vigilance against cyber-attacks may involve substantial costs over time, and system enhancements may themselves be subject to cyber-attacks. I. Insurance-Linked Securities ("ILS") Event-linked bonds are floating rate debt obligations for which the return of principal and the payment of interest are contingent on the non-occurrence of a pre-defined "trigger" event, such as a hurricane or an earthquake of a specific magnitude. The trigger event's magnitude may be based on losses to a company or industry, industry indexes or readings of scientific instruments, or may be based on specified actual losses. If a trigger event occurs, as defined within the terms of an event-linked bond, the Fund may lose a portion or all of its accrued interest and/or principal invested in such event-linked bond. The Fund is entitled to receive principal and interest payments so long as no trigger event occurs of the description and magnitude specified by the instrument. In addition to the specified trigger events, event-linked bonds may expose the Fund to other risks, including but not limited to issuer (credit) default, adverse regulatory or jurisdictional interpretations and adverse tax consequences. The Fund's investments in ILS may include special purpose vehicles ("SPVs") or similar instruments structured to comprise a portion of a reinsurer's catastrophe-oriented business, known as quota share instruments (sometimes referred to as reinsurance sidecars), or to provide reinsurance relating to specific risks to insurance or reinsurance companies through a collateralized instrument, known as collateralized reinsurance. Structured reinsurance investments also may include industry loss warranties ("ILWs"). A traditional ILW takes the form of a bilateral reinsurance contract, but there are also products that take the form of derivatives, collateralized structures, or exchange-traded instruments. Structured reinsurance investments, including quota share instruments, collateralized reinsurance investments and ILWs, generally are subject to the same risks as event-linked bonds. In addition, where the instruments are based on the performance of underlying reinsurance contracts, the Fund has limited transparency into the individual underlying contracts, and therefore must rely upon the risk assessment and sound underwriting practices of the issuer. Accordingly, it may be more difficult for the Adviser to fully evaluate the underlying risk profile of the Fund's structured reinsurance investments, and therefore the Fund's assets are placed at greater risk of loss than if the Adviser had more complete information. Structured reinsurance instruments generally will be considered illiquid securities by the Fund. These securities may be difficult to purchase, sell or unwind. Illiquid securities also may be difficult to value. If the Fund is forced to sell an illiquid asset, the Fund may be forced to sell at a loss. 66 Pioneer Global Multisector Income Fund | Semiannual Report | 4/30/18 Additionally, the Fund may invest in ILS by investing in a closed end interval Fund, Pioneer ILS Interval Fund, an affiliate of the Adviser. The Fund's investment in Pioneer ILS Interval Fund at April 30, 2018 is listed in the Schedule of Investments. J. Futures Contracts The Fund may enter into futures transactions in order to attempt to hedge against changes in interest rates, securities prices and currency exchange 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 April 30, 2018, is recorded as "Futures collateral" on 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. Cash received from or paid to the broker related to previous margin movement is held in a segregated account at the broker and is recorded as either "Due from broker for futures" or "Due to broker for futures" on the Statement of Assets and Liabilities. 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. Futures contracts are subject to market risk, interest rate risk and currency exchange rate risk. Changes in value of the contracts may not directly correlate to the changes in value of the underlying securities. With futures, there is minimal counterparty credit risk to the Fund since futures are exchange-traded and the exchange's clearinghouse, as counterparty to all exchange-traded futures, guarantees the futures against default. The average absolute market value of contracts open during the six months ended April 30, 2018, was $15,083,632. K. Credit Default Swap Contracts A credit default swap is a contract between a buyer of protection and a seller of protection against a pre-defined credit event on an underlying reference obligation, which may be a single security or a basket or index of securities. The Fund may buy or sell credit default swap contracts to seek to increase the Fund's income, or to attempt to hedge the risk of default on portfolio securities. A credit default swap index is used to hedge risk or take a position on a basket of credit entities or indices. Pioneer Global Multisector Income Fund | Semiannual Report | 4/30/18 67 As a seller of protection, the Fund would be required to pay the notional (or other agreed-upon) value of the referenced debt obligation to the counterparty in the event of a default by a U.S. or foreign corporate issuer of a debt obligation, which would likely result in a loss to the Fund. In return, the Fund would receive from the counterparty a periodic stream of payments during the term of the contract, provided that no event of default occurred. The maximum exposure of loss to the seller would be the notional value of the credit default swaps outstanding. If no default occurs, the Fund would keep the stream of payments and would have no payment obligation. The Fund may also buy credit default swap contracts in order to hedge against the risk of default of debt securities, in which case the Fund would function as the counterparty referenced above. As a buyer of protection, the Fund makes an upfront or periodic payment to the protection seller in exchange for the right to receive a contingent payment. An upfront payment made by the Fund, as the protection buyer, is recorded within the "Swap contracts, at value" line item on the Statement of Assets and Liabilities. Periodic payments received or paid by the Fund are recorded as realized gains or losses on the Statement of Operations. Credit default swap contracts are marked-to-market daily using valuations supplied by independent sources and the change in value, if any, is recorded within "Swap contracts, at value" line item on the Statement of Assets and Liabilities. Payments received or made as a result of a credit event or upon termination of the contract are recognized, net of the appropriate amount of the upfront payment, as realized gains or losses on the Statement of Operations. Credit default swap contracts involving the sale of protection may involve greater risks than if the Fund had invested in the referenced debt instrument directly. Credit default swap contracts are subject to general market risk, liquidity risk, counterparty risk and credit risk. If the Fund is a protection buyer and no credit event occurs, it will lose its investment. If the Fund is a protection seller and a credit event occurs, the value of the referenced debt instrument received by the Fund, together with the periodic payments received, may be less than the amount the Fund pays to the protection buyer, resulting in a loss to the Fund. Certain swap contracts that are cleared through a central clearinghouse are referred to as centrally cleared swaps. All payments made or received by the Fund are pursuant to a centrally cleared swap contract with the central clearing party rather than the original counterparty. Upon entering into a centrally cleared swap contract, the Fund is required to make an initial margin deposit, either in cash or in securities. The daily change in value on open centrally cleared contracts is recorded as variation margin from 68 Pioneer Global Multisector Income Fund | Semiannual Report | 4/30/18 centrally cleared swaps on the Statement of Assets and Liabilities. Cash received from or paid to the broker related to previous margin movement is held in a segregated account at the broker and is recorded as either "Due from broker for swaps" or " Due to broker for swaps" on the Statement of Assets and Liabilities. The amount of cash deposited with a broker as collateral at April 30, 2018 is recorded as "Swaps Collateral" on the Statement of Assets and Liabilities. Open credit default swap contracts at April 30, 2018, are listed in the Schedule of Investments. The average notional value of swap contracts open during the six month ended April 30, 2018 was $405,228. L. Option Writing The Fund may write put and covered call options to seek to increase total return. When an option is written, the Fund receives a premium and becomes obligated to purchase or sell the underlying security at a fixed price, upon the exercise of the option. When the Fund writes an option, an amount equal to the premium received by the Fund is recorded as a liability and is subsequently adjusted to the current value of the option written. Premiums received from writing options that expire unexercised are treated by the Fund on the expiration date as realized gains from investments. The difference between the premium and the amount paid on effecting a closing purchase transaction, including brokerage commissions, is also treated as a realized gain, or, if the premium is less than the amount paid for the closing purchase transaction, as a realized loss. If a call option is exercised, the premium is added to the proceeds from the sale of the underlying security in determining whether the Fund has realized a gain or loss. The Fund as writer of an option bears the market risk of an unfavorable change in the price of the security underlying the written option. The average market value of contracts open during the six months ended April 30, 2018 was $(1,242). Open written options contracts at April 30, 2018 are listed in the Schedule of Investments. M. Purchased Options The Fund may purchase put and call options to seek to increase total return. Purchased call and put options entitle the Fund to buy and sell a specified number of shares or units of a particular security, currency or index at a specified price at a specific date or within a specific period of time. Upon the purchase of a call or put option, the premium paid by the Fund is included on the Statement of Assets and Liabilities as an investment. All premiums are marked-to-market daily, and any unrealized appreciation or depreciation are recorded in the Fund's financial statements. As the purchaser of an index option, the Fund has the right to receive a cash payment equal to any depreciation in the value of the index below the strike price of the option (in Pioneer Global Multisector Income Fund | Semiannual Report | 4/30/18 69 the case of a put) or equal to any appreciation in the value of the index over the strike price of the option (in the case of a call) as of the valuation date of the option. Premiums paid for purchased call and put options which have expired are treated as realized losses on investments on the Statement of Operations. Upon the exercise or closing of a purchased put option, the premium is offset against the proceeds on the sale of the underlying security or financial instrument in order to determine the realized gain or loss on investments. Upon the exercise or closing of a purchased call option, the premium is added to the cost of the security or financial instrument. The risk associated with purchasing options is limited to the premium originally paid. The average market value of contracts open during the six months ended April 30, 2018 was $3,928. Purchased options open at April 30, 2018 are listed in the Schedule of Investments. 2. Management Agreement The Adviser manages the Fund's portfolio. Management fees are calculated daily at the annual rate of 0.50% of the Fund's average daily net assets. For the six month ended April 30, 2018, the effective management fee (excluding waivers and/or assumption of expenses) was equivalent to 0.48% (annualized) 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 1.00%, 1.90% 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 six months ended April 30, 2018, are reflected on the Statement of Operations. These expense limitations are in effect through March 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 $37,918 in management fees, administrative costs and certain other reimbursements payable to the Adviser at April 30, 2018. 70 Pioneer Global Multisector Income Fund | Semiannual Report | 4/30/18 3. Transfer Agent DST Asset Manager Solutions, 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 shareowner communications activities such as proxy and statement mailings, outgoing phone calls and omnibus relationship contracts. For the six months ended April 30, 2018, such out-of-pocket expenses by class of shares were as follows: -------------------------------------------------------------------------------- Shareowner Communications: -------------------------------------------------------------------------------- Class A $1,700 Class C 825 Class Y 175 -------------------------------------------------------------------------------- Total $2,700 ================================================================================ 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. 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 $2,328 in distribution fees payable to the Distributor at April 30, 2018. 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 six months ended April 30, 2018, CDSCs in the amount of $9,317 were paid to the Distributor. Pioneer Global Multisector Income Fund | Semiannual Report | 4/30/18 71 5. 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 Over the Counter ("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 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 each specific ISDA of each 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 on the Statement of Assets and Liabilities as "Swaps collateral" and/or "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 not been offset on the Statement of Assets and Liabilities. The following charts show gross assets and liabilities of the Fund as of April 30, 2018. 72 Pioneer Global Multisector Income Fund | Semiannual Report | 4/30/18 ----------------------------------------------------------------------------------------------------- Derivative Assets Subject to Derivatives Non-Cash Cash Net Amount Master Netting Available Collateral Collateral of Derivative Counterparty Agreement for Offset Received (a) Received (a) Assets (b) ----------------------------------------------------------------------------------------------------- Bank of New York $ 3,752 $ (3,752) $ -- $ -- $ -- Brown Brothers Harriman & Co. 69,086 (39,392) -- -- 29,694 Citibank NA -- -- -- -- -- Goldman Sachs International -- -- -- -- -- JPMorgan Chase Bank NA 3,401 (3,401) -- -- -- Morgan Stanley Capital Services LLC 2,384 -- -- -- 2,384 State Street Bank & Trust Co. 5,964 (5,964) -- -- -- ----------------------------------------------------------------------------------------------------- Total $84,587 $(52,509) $ -- $ -- $32,078 ===================================================================================================== ----------------------------------------------------------------------------------------------------- Derivative Liabilities Subject to Derivatives Non-Cash Cash Net Amount Master Netting Available Collateral Collateral of Derivative Counterparty Agreement for Offset Pledged (a) Pledged (a) Liabilities (c) ----------------------------------------------------------------------------------------------------- Bank of New York $ 32,183 $ (3,752) $ -- $ -- $ 28,431 Brown Brothers Harriman & Co. 39,392 (39,392) -- -- -- Citibank NA 74,324 -- -- -- 74,324 Goldman Sachs International 29,083 -- -- -- 29,083 JPMorgan Chase Bank NA 181,122 (3,401) -- -- 177,721 Morgan Stanley Capital Services LLC -- -- -- -- -- State Street Bank & Trust Co. 11,600 (5,964) -- -- 5,636 ----------------------------------------------------------------------------------------------------- Total $367,704 $(52,509) $ -- $ -- $315,195 ===================================================================================================== (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. 6. Additional Disclosures about Derivative Instruments and Hedging Activities The Fund's use of derivatives may enhance or mitigate the Fund's exposure 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. Pioneer Global Multisector Income Fund | Semiannual Report | 4/30/18 73 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 fair value of open derivative instruments (not considered to be hedging instruments for accounting disclosure purposes) by risk exposure at April 30, 2018 was as follows: ----------------------------------------------------------------------------------------------------- Foreign Statement of Assets Interest Credit Exchange Equity Commodity and Liabilities Rate Risk Risk Rate Risk Risk Risk ----------------------------------------------------------------------------------------------------- Assets Net unrealized appreciation on futures contracts $52,434 $ -- $ -- $ -- $ -- Swap contracts, at value -- 26,519 -- -- -- ----------------------------------------------------------------------------------------------------- Total Value $52,434 $26,519 $ -- $ -- $ -- ===================================================================================================== ----------------------------------------------------------------------------------------------------- Foreign Statement of Assets Interest Credit Exchange Equity Commodity and Liabilities Rate Risk Risk Rate Risk Risk Risk ----------------------------------------------------------------------------------------------------- Liabilities Net unrealized depreciation on forward foreign currency contracts $ -- $ -- $285,501 $ -- $ -- Written options outstanding -- -- 5,240 -- -- ----------------------------------------------------------------------------------------------------- Total Value $ -- $ -- $290,741 $ -- $ -- ===================================================================================================== 74 Pioneer Global Multisector Income Fund | Semiannual Report | 4/30/18 The effect of derivative instruments (not considered to be hedging instruments for accounting disclosure purposes) on the Statement of Operations by risk exposure at April 30, 2018 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 $197,350 $ -- $ -- $ -- $ -- Swap contracts -- 5,679 -- -- -- Forward foreign currency contracts -- -- (34,554) -- -- ------------------------------------------------------------------------------------------------------------ Total Value $197,350 $ 5,679 $ (34,554) $ -- $ -- ============================================================================================================ Change in net unrealized appreciation (depreciation) on: Futures contracts $(29,831) $ -- $ -- $ -- $ -- Swap contracts -- (3,499) -- -- -- Written options -- -- 3,334 -- -- Forward foreign currency contracts -- -- (261,526) -- -- ------------------------------------------------------------------------------------------------------------ Total Value $(29,831) $(3,499) $(258,192) $ -- $ -- ============================================================================================================ 7. 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 Fund participates in a credit facility that is in the amount of $13.9 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 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 six months ended April 30, 2018, the Fund had no borrowings under the credit facility. 8. 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 obliged 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 on the Statement of Operations. Pioneer Global Multisector Income Fund | Semiannual Report | 4/30/18 75 As of April 30, 2018, the Fund had the following unfunded loan commitments outstanding: -------------------------------------------------------------------------------- Unrealized Appreciation/ Loan Principal Cost Value Depreciation -------------------------------------------------------------------------------- Centene Corp. $85,000 $85,000 $85,000 $-- DG Investment Intermediate Holdings 4,839 4,839 4911 72 -------------------------------------------------------------------------------- Total Value $89,839 $89,839 $89,911 $72 ================================================================================ 76 Pioneer Global Multisector Income Fund | Semiannual Report | 4/30/18 ADDITIONAL INFORMATION 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, 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 October 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 Pioneer Global Multisector Income Fund | Semiannual Report | 4/30/18 77 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 adviser 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. 78 Pioneer Global Multisector Income Fund | Semiannual Report | 4/30/18 Trustees, Officers and Service Providers Trustees Officers Thomas J. Perna, Chairman Lisa M. Jones, President and David R. Bock Chief Executive Officer Benjamin M. Friedman Mark E. Bradley, Treasurer and Margaret B.W. Graham Chief Financial Officer Lisa M. Jones Christopher J. Kelley, Secretary and Lorraine H. Monchak Chief Legal Officer Marguerite A. Piret Fred J. Ricciardi Kenneth J. Taubes Investment Adviser and Administrator Amundi Pioneer Asset Management, Inc. Custodian and Sub-Administrator Brown Brothers Harriman & Co. Principal Underwriter Amundi Pioneer Distributor, Inc. Legal Counsel Morgan, Lewis & Bockius LLP Shareowner Services and Transfer Agent DST Asset Manager Solutions, 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. Pioneer Global Multisector Income Fund | Semiannual Report | 4/30/18 79 This page is for your notes. 80 Pioneer Global Multisector Income Fund | Semiannual Report | 4/30/18 This page is for your notes. Pioneer Global Multisector Income Fund | Semiannual Report | 4/30/18 81 This page is for your notes. 82 Pioneer Global Multisector Income Fund | Semiannual Report | 4/30/18 This page is for your notes. Pioneer Global Multisector Income Fund | Semiannual Report | 4/30/18 83 This page is for your notes. 84 Pioneer Global Multisector Income Fund | Semiannual Report | 4/30/18 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 us.askamundipioneer@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 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) 2018 Amundi Pioneer Asset Management 21910-10-0618 Pioneer Global High Yield Fund -------------------------------------------------------------------------------- Semiannual Report | April 30, 2018 -------------------------------------------------------------------------------- Ticker Symbols: Class A PGHYX Class C PGYCX Class Y GHYYX [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 43 Notes to Financial Statements 50 Additional Information 68 Trustees, Officers and Service Providers 70 Pioneer Global High Yield Fund | Semiannual Report | 4/30/18 1 President's Letter While 2017 delivered strong positive performance, 2018, thus far, has introduced market volatility. Equity and fixed-income markets pulled back in the first quarter of this year, as the Standard & Poor's 500 Index and the Bloomberg Barclays U.S. Aggregate Bond Index both finished in negative territory, returning -0.76% and -1.46%, respectively, for the three-month period ended March 31, 2018. Concerns about the sustainability of the pace of economic growth, extended equity valuations, and rising interest rates drove a significant stock market sell-off beginning in late January, approaching correction levels. The market did recover from its initial slump, but this year's significant fluctuations have served to remind investors that even the strongest "bulls" cannot run forever. Within fixed income, rising interest rates helped drive down returns of most asset classes in the first quarter, though floating-rate sectors such as bank loans fared well in the rising-rate environment. Our view is that the first-quarter pause in the market's near-continuous upward momentum over the previous 15 months, dating back to the final quarter of 2016, presents an opportunity for investors to enter the market at healthier valuation levels. We believe fundamentals are still quite positive, yet also believe that caution is warranted given that the market remains vulnerable to corrections. Some areas, such as growth stocks, appear expensive, but we do see opportunity in value stocks, with prices supported by better corporate earnings due to the recent tax reforms in the U.S. as well as robust, nominal gross domestic product (GDP) growth. In fact, GDP growth in the U.S. rose to close to or better than 3% over the final three quarters of 2017, and GDP growth in the first quarter of 2018 registered at 2.3%. In the fixed-income markets, we believe investors should consider positioning their portfolios to defend against rising interest rates, with underweight positions in U.S. Treasuries. We see more attractive valuations within structured investment vehicles, such as mortgage-backed securities (MBS) in both the agency and non-agency residential MBS sectors, as fundamentals within the U.S. housing market remain positive. We believe that agency MBS, in particular, offer investors reasonable value. Since 1928, the foundation of Amundi Pioneer's investment approach has been active management, which is especially important during periods of market volatility. We believe investors can benefit from the experience and tenure of our investment teams who make active and informed decisions across our funds. In fact, the Pioneer Fund, the third-oldest mutual fund in the U.S., recently celebrated its 90th birthday. We believe the Fund serves as an important ambassador of our time-tested value style of investing and our early focus on understanding the potential benefits of investing in companies with 2 Pioneer Global High Yield Fund | Semiannual Report | 4/30/18 sustainable business models. Over its nine decades of existence - a time period that included a Great Depression, a devastating World War, a long Cold War, and enormous technological as well as societal changes - the Fund has been well-served by this investment approach. 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. /s/ Lisa M. Jones Lisa M. Jones Head of the Americas, President and CEO of U.S. Amundi Pioneer Asset Management USA, Inc. April 30, 2018 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 High Yield Fund | Semiannual Report | 4/30/18 3 Portfolio Management Discussion | 4/30/18 In the following interview, Andrew Feltus discusses the market environment and the performance of Pioneer Global High Yield Fund during the six-month period ended April 30, 2018. Mr. Feltus, Managing Director, Co-Director of High Yield, and a portfolio manager at Amundi Pioneer Asset Management, Inc. ("Amundi Pioneer") is lead manager of the Fund, which is co-managed by Kenneth J. Monaghan, Managing Director, Co-Director of High Yield, and a portfolio manager at Amundi Pioneer. Q How did the Fund perform during the six-month period ended April 30, 2018? A Pioneer Global High Yield Fund's Class A shares returned 0.07% at net asset value during the six-month period ended April 30, 2018, while the Fund's benchmarks, the Bloomberg Barclays Global High Yield Index (the Bloomberg Barclays Index) and the ICE Bank of America Merrill Lynch (BofA ML) U.S. High Yield Index, returned -0.10% and -0.23%, respectively. During the same period, the average return of the 717 mutual funds in Morningstar's High Yield Bond Funds category was -0.34%. Q Could you please describe the market environment for global high-yield investors during the six-month period ended April 30, 2018? A Entering the period, credit-oriented areas of the bond market (bonds sensitive to credit risk rather than interest-rate risk) continued to be supported by positive global economic data, accommodative policy stances by leading overseas central banks, and the Federal Reserve's (the Fed's) well-signaled, incremental approach towards interest-rate normalization as well as the tapering of its balance sheet. The U.S. economy posted gross domestic product (GDP) growth in the 3% range over the last three quarters of 2017, against a backdrop of robust corporate earnings and arguably full employment. The economies of Europe and Japan were comfortably in positive territory over that same period, while China continued to report economic growth in the 7% range. Credit-market sentiment received an additional boost as 2017 drew to a close with the passage of a tax reform package in the U.S. that included a lowering of the corporate tax rate and a window during which companies are permitted to accelerate the expensing of capital investments. While so-called "risk" markets opened 2018 with a positive tenor, volatility would soon come to the forefront. In January, U.S. employment data surprised to the upside, leading the market to revise inflation expectations 4 Pioneer Global High Yield Fund | Semiannual Report | 4/30/18 higher and raising concerns that the Fed would feel compelled to accelerate the pace of its rate hikes. While sentiment around inflation stabilized fairly quickly, the markets received another jolt in March as the Trump administration announced its intention to impose tariffs on steel and aluminum as well as on a wide range of imports from China. The move raised the prospect of a trade war with the potential to undermine global economic growth, while leading indicators in Europe suggested that the recovery had peaked in the world's second-largest economic region. April saw U.S. Treasury yields embark on another upward leg in the wake of the release of the Fed's March meeting minutes, which pointed toward a consensus among committee members that U.S. inflation was safely headed toward its target and that there was, perhaps, room to raise the federal funds rate more rapidly than previously expected. The ongoing climb in crude oil prices, which broke through the $50 a barrel trading range in late 2017, fueled additional anxiety about inflation and interest rates, while also promising to potentially offset the benefit to consumers from lower individual tax rates in the U.S. The firming outlook for higher U.S. interest rates led to a weakening in some of the less fundamentally sound emerging market bond markets and currencies. The U.S. Treasury curve flattened over the six-month period, as yields on shorter maturities were the most affected by the Fed's policy path. To illustrate, the two-year Treasury yield rose 89 basis points (bps), from 1.60% to 2.49%, the five-year Treasury yield rose 78 bps, from 2.01% to 2.79%, the 10-year yield rose 57 bps, from 2.38% to 2.95%, and the 30-year yield rose by 23 bps, from 2.88% to 3.11%. (A basis point is equal to 1/100th of a percentage point.) While fixed-income returns in general finished the six-month period in negative territory, credit-oriented issues such as high-yield corporates and emerging markets debt outperformed higher-quality, more interest-rate-sensitive market segments. Q What were the principal factors that influenced the Fund's benchmark-relative performance during the six-month period ended April 30, 2018? A During a difficult period for fixed-income investors, the Fund managed to outperform its benchmarks. The main positive contributor to the Fund's benchmark-relative performance over the period was strong security selection across global high-yield bond markets, including U.S. high-yield corporates, European high-yield corporates, and emerging markets high- yield sovereign and corporate bonds. In that vein, the Fund's exposure to U.S. wireline companies added notably to relative returns; in particular, a position in Frontier Communications, a leading consolidator of legacy landline services, contributed positively to performance. A position in Pioneer Global High Yield Fund | Semiannual Report | 4/30/18 5 Bermuda-registered shipping company Golar LNG also contributed, as rising liquefied natural gas shipping volumes have boosted the company's profits. In addition, portfolio holdings of the euro-denominated debt of Valeant Pharmaceuticals performed well, as the company has taken steps to reduce debt while moving to a more sustainable drug-pricing model. The rise of the euro relative to the U.S. dollar (USD) over the period was another positive factor in the Valeant position's solid return. Among the Fund's holdings in the emerging markets, a pair of utilities - Stoneway Capital (Argentina) and CEMIG (Brazil) - were the leading positive benchmark-relative contributors. Additionally, modest out-of-benchmark portfolio positions in event-linked securities issued by insurers seeking to mitigate the cost of post-disaster claims, leveraged bank loans, and convertible bonds made positive contributions to the Fund's relative performance. Meanwhile, the portfolio's short-duration position relative to the Bloomberg Barclays Index supported relative results as U.S. Treasury yields moved higher over the six months. (Duration is 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.) On the downside, the Fund's exposure to PetSmart's debt constrained relative results, as investor concerns over competition from online retailers weighed on the bond price. Italian wireless company Wind Tre also lagged and detracted from the Fund's relative performance, due to concerns over whether the efficiencies to be realized from the merger which formed the company would be sufficient to effectively address legacy debt. Within emerging markets, the Fund's position in Russia-based United Company RUSAL, the world's second-largest producer of aluminum, performed poorly as the company was subjected to significant U.S. sanctions. During a period when the euro strengthened versus the USD, the Fund's underweight to the euro compared with the Bloomberg Barclays Index acted as another constraint on relative performance. Q Did the Fund have any investments in derivative securities during the six-month period ended April 30, 2018? A Yes, we invested in some credit-default swaps to manage the portfolio's exposure to the high-yield corporate sector during periods of asset flows into or out of the Fund. The investments had a slight positive influence on the Fund's results. We also used forward foreign currency contracts (currency forwards) to manage currency risk in the portfolio. The currency forwards were a small detractor from the Fund's performance as the euro rose relative to the USD over the six-month period. 6 Pioneer Global High Yield Fund | Semiannual Report | 4/30/18 Q Did the Fund's distributions to shareholders change during the six-month period ended April 30, 2018? A The Fund's distributions* declined during the six-month period as high-yield bonds outperformed other sectors and credit spreads compressed. (Credit spreads are commonly defined as the differences in yield between Treasuries and other types of fixed-income securities with similar maturities.) Essentially, as high-yield bond prices rose, their yields declined. In addition, newer portfolio holdings usually paid lower yields than older debt that had been issued when market rates were higher. Q What is your investment outlook? A In our view, fundamentals remain supportive of credit-oriented segments of the market. Economic growth and corporate earnings remain strong, unemployment is low, wages have been trending modestly higher, and consumer balance sheets are sound in aggregate. At the same time, credit-asset valuations are relatively high, as reflected in meaningfully tight spreads by historical standards. In addition, after an extended period of seeing risk assets more or less grind steadily higher, volatility appears to have returned to the markets, driven in large part by speculation over the pace of the Fed's interest-rate hikes as well as geopolitical uncertainty. The markets will be watching closely for any data - such as accelerating wage growth - that could signal the potential for higher inflation and thus spur the Fed to increase its benchmark rate more rapidly than currently anticipated. Given that backdrop, we are being measured in adding credit risk to the portfolio. In addition, we are maintaining a meaningfully below-benchmark duration in order to keep the Fund positioned to take advantage of any rise in market interest rates, or a widening of credit spreads, that could result in valuation opportunities. * Distributions are not guaranteed. Pioneer Global High Yield Fund | Semiannual Report | 4/30/18 7 Please refer to the Schedule of Investments on pages 16-42 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. Investing in foreign and/or emerging markets securities involves risks relating to interest rates, currency exchange rates, and economic and political conditions. Prepayment risk is the chance that an issuer may exercise its right to repay 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 Fund 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 pre-payments. 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 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. 8 Pioneer Global High Yield Fund | Semiannual Report | 4/30/18 Portfolio Summary | 4/30/18 Portfolio Diversification* -------------------------------------------------------------------------------- (As a percentage of total investments)** [THE FOLLOWING DATA WAS REPRESENTED AS A PIE CHART IN THE PRINTED MATERIAL] International Corporate Bonds 42.8% U.S. Corporate Bonds 41.8% Foreign Government Bonds 6.4% Senior Secured Floating Rate Loan Interests 3.0% Convertible Corporate Bonds 1.7% Convertible Preferred Stocks 1.1% Collateralized Mortgage Obligations 1.1% U.S. Government and Agency Obligations 1.1% U.S. Preferred Stocks 0.4% International Common Stocks 0.3% U.S. Common Stocks 0.2% Asset Backed Security 0.1% Rights/Warrants 0.0%+ Call Option Purchased 0.0%+ * Includes investments in Insurance-Linked Securities totaling 3.6% of total investments. + Amount rounds to less than 0.1%. Geographical Distribution -------------------------------------------------------------------------------- (As a percentage total investments based on country of domicile)** [THE FOLLOWING DATA WAS REPRESENTED AS A PIE CHART IN THE PRINTED MATERIAL] United States 50.1% Netherlands 6.7% Luxembourg 6.2% Argentina 3.8% Bermuda 3.6% United Kingdom 3.5% Mexico 2.7% France 2.4% Brazil 1.5% Ireland 1.5% Canada 1.1% India 1.0% Other (individually less than 1%) 15.9% 10 Largest Holdings -------------------------------------------------------------------------------- (As a percentage of total investments)** 1. Minerva Luxembourg SA, 5.875%, 1/19/28 (144A) 1.15% -------------------------------------------------------------------------------- 2. Petrobras Global Finance BV, 5.299%, 1/27/25 (144A) 1.10 -------------------------------------------------------------------------------- 3. Platin 1426 GmbH, 5.375%, 6/15/23 (144A) 0.93 -------------------------------------------------------------------------------- 4. Nationstar Mortgage LLC / Nationstar Capital Corp., 6.5%, 6/1/22 0.90 -------------------------------------------------------------------------------- 5. Sprint Corp., 7.25%, 9/15/21 0.88 -------------------------------------------------------------------------------- 6. TA MFG., Ltd., 3.625%, 4/15/23 (144A) 0.87 -------------------------------------------------------------------------------- 7. YPF SA, 6.95%, 7/21/27 (144A) 0.86 -------------------------------------------------------------------------------- 8. MTN Mauritius Investment, Ltd., 5.373%, 2/13/22 (144A) 0.86 -------------------------------------------------------------------------------- 9. Frontier Communications Corp., 8.75%, 4/15/22 0.83 -------------------------------------------------------------------------------- 10. Marfrig Holding Europe BV, 8.0%, 6/8/23 (144A) 0.77 -------------------------------------------------------------------------------- ** Excludes temporary cash investments and all derivative contracts except for options purchased. The Fund 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 Global High Yield Fund | Semiannual Report | 4/30/18 9 Prices and Distributions | 4/30/18 Net Asset Value per Share -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- Class 4/30/18 10/31/17 -------------------------------------------------------------------------------- A $8.90 $9.12 -------------------------------------------------------------------------------- C $8.88 $9.09 -------------------------------------------------------------------------------- Y $8.74 $8.95 -------------------------------------------------------------------------------- Distributions per Share: 11/1/17-4/30/18 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- Short-Term Long-Term Tax Return Class Dividends Capital Gains Capital Gains of Capital -------------------------------------------------------------------------------- A $0.2270 $ -- $ -- $ -- -------------------------------------------------------------------------------- C $0.1939 $ -- $ -- $ -- -------------------------------------------------------------------------------- Y $0.2347 $ -- $ -- $ -- -------------------------------------------------------------------------------- Index Definitions -------------------------------------------------------------------------------- The Bloomberg Barclays Global High Yield Index is an unmanaged index that provides a broad-based measure of the global high-yield fixed-income markets. The index represents the union of the Barclays U.S. High-Yield, Barclays Pan-European High-Yield, Barclays U.S. Emerging Markets High-Yield, and Barclays Pan-European Emerging Markets High-Yield Indices. The ICE 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 indices defined here pertain to the "Value of $10,000 Investment" and "Value of $5 Million Investment" charts appearing on pages 11-13. 10 Pioneer Global High Yield Fund | Semiannual Report | 4/30/18 Performance Update | 4/30/18 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 High Yield Fund at public offering price during the periods shown, compared to that of the Bloomberg Barclays Global High Yield Index and the ICE Bank of America (BofA) Merrill Lynch (ML) U.S. High Yield Index. Average Annual Total Returns (As of April 30, 2018) -------------------------------------------------------------------------------- BBG ICE Barclays BofA Net Public Global ML U.S. Asset Offering High High Value Price Yield Yield Period (NAV) (POP) Index Index -------------------------------------------------------------------------------- 10 years 5.39% 4.90% 7.88% 7.75% 5 years 2.81 1.87 4.74 4.76 1 year 4.80 0.08 4.60 3.21 -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated March 1, 2018) -------------------------------------------------------------------------------- Gross -------------------------------------------------------------------------------- 1.18% -------------------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $10,000 Investment Pioneer Global Bloomberg Barclays ICE BofA ML U.S. High Yield Fund Global High Yield Index High Yield Index 4/08 $ 9,550 $10,000 $10,000 4/09 $ 6,765 $ 8,460 $ 8,531 4/10 $10,943 $12,265 $12,302 4/11 $12,614 $14,111 $13,948 4/12 $12,437 $14,738 $14,662 4/13 $14,045 $16,930 $16,720 4/14 $14,640 $18,185 $17,773 4/15 $14,372 $18,038 $18,229 4/16 $13,746 $18,321 $17,985 4/17 $15,363 $20,405 $20,442 4/18 $16,136 $21,343 $21,099 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 Global High Yield Fund | Semiannual Report | 4/30/18 11 Performance Update | 4/30/18 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 High Yield Fund during the periods shown, compared to that of the Bloomberg Barclays Global High Yield Index and the ICE Bank of America (BofA) Merrill Lynch (ML) U.S. High Yield Index. Average Annual Total Returns (As of April 30, 2018) -------------------------------------------------------------------------------- BBG ICE Barclays BofA Global ML U.S. High High If If Yield Yield Period Held Redeemed Index Index -------------------------------------------------------------------------------- 10 years 4.64% 4.64% 7.88% 7.75% 5 years 2.06 2.06 4.74 4.76 1 year 4.18 4.18 4.60 3.21 -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated March 1, 2018) -------------------------------------------------------------------------------- Gross -------------------------------------------------------------------------------- 1.89% -------------------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $10,000 Investment Pioneer Global Bloomberg Barclays ICE BofA ML U.S. High Yield Fund Global High Yield Index High Yield Index 4/08 $10,000 $10,000 $10,000 4/09 $ 7,023 $ 8,460 $ 8,531 4/10 $11,291 $12,265 $12,302 4/11 $12,928 $14,111 $13,948 4/12 $12,681 $14,738 $14,662 4/13 $14,213 $16,930 $16,720 4/14 $14,674 $18,185 $17,773 4/15 $14,316 $18,038 $18,229 4/16 $13,578 $18,321 $17,985 4/17 $15,106 $20,405 $20,442 4/18 $15,737 $21,343 $21,099 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 Global High Yield Fund | Semiannual Report | 4/30/18 Performance Update | 4/30/18 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 High Yield Fund during the periods shown, compared to that of the Bloomberg Barclays Global High Yield Index and the ICE Bank of America (BofA) Merrill Lynch (ML) U.S. High Yield Index. Average Annual Total Returns (As of April 30, 2018) ------------------------------------------------------------------------------- BBG ICE Barclays BofA Net Global ML U.S. Asset High High Value Yield Yield Period (NAV) Index Index ------------------------------------------------------------------------------- 10 years 5.66% 7.88% 7.75% 5 years 3.05 4.74 4.76 1 year 5.08 4.60 3.21 ------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated March 1, 2018) ------------------------------------------------------------------------------- Gross ------------------------------------------------------------------------------- 0.91% ------------------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $5 Million Investment Pioneer Global Bloomberg Barclays ICE BofA ML U.S. High Yield Fund Global High Yield Index High Yield Index 4/08 $5,000,000 $ 5,000,000 $ 5,000,000 4/09 $3,559,689 $ 4,229,824 $ 4,265,528 4/10 $5,766,724 $ 6,132,405 $ 6,151,060 4/11 $6,655,901 $ 7,055,429 $ 6,973,995 4/12 $6,587,929 $ 7,369,048 $ 7,330,886 4/13 $7,461,859 $ 8,465,107 $ 8,360,120 4/14 $7,785,509 $ 9,092,489 $ 8,886,485 4/15 $7,663,310 $ 9,019,030 $ 9,114,528 4/16 $7,338,486 $ 9,160,507 $ 8,992,726 4/17 $8,250,407 $10,202,415 $10,221,009 4/18 $8,669,728 $10,671,313 $10,549,537 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 Global High Yield Fund | Semiannual Report | 4/30/18 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 Global High Yield Fund Based on actual returns from November 1, 2017, through April 30, 2018. -------------------------------------------------------------------------------------- Share Class A C Y -------------------------------------------------------------------------------------- Beginning Account $1,000.00 $1,000.00 $1,000.00 Value on 11/1/17 -------------------------------------------------------------------------------------- Ending Account Value (after expenses) $1,000.70 $ 998.10 $1,002.70 on 4/30/18 -------------------------------------------------------------------------------------- Expenses Paid During Period* $ 5.80 $ 9.36 $ 4.47 -------------------------------------------------------------------------------------- * Expenses are equal to the Fund's annualized net expense ratio of 1.17%, 1.89% and 0.90% for Class A, Class C and Class Y shares, respectively, multiplied by the average account value over the period, multiplied by 181/365 (to reflect the one-half year period). 14 Pioneer Global High Yield Fund | Semiannual Report | 4/30/18 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 Global High Yield Fund Based on a hypothetical 5% return per year before expenses, reflecting the period from November 1, 2017, through April 30, 2018. -------------------------------------------------------------------------------------- Share Class A C Y -------------------------------------------------------------------------------------- Beginning Account $1,000.00 $1,000.00 $1,000.00 Value on 11/1/17 -------------------------------------------------------------------------------------- Ending Account Value (after expenses) $1,018.99 $1,015.42 $1,020.33 on 4/30/18 -------------------------------------------------------------------------------------- Expenses Paid During Period* $ 5.86 $ 9.44 $ 4.51 -------------------------------------------------------------------------------------- * Expenses are equal to the Fund's annualized net expense ratio of 1.17%, 1.89% and 0.90% for Class A, Class C and Class Y shares, respectively, multiplied by the average account value over the period, multiplied by 181/365 (to reflect the one-half year period). Pioneer Global High Yield Fund | Semiannual Report | 4/30/18 15 Schedule of Investments | 4/30/18 (unaudited) -------------------------------------------------------------------------------------------------------------- Principal Amount USD ($) Value -------------------------------------------------------------------------------------------------------------- UNAFFILIATED ISSUERS -- 97.5% CONVERTIBLE CORPORATE BONDS -- 1.9% of Net Assets CAPITAL GOODS -- 0.1% Electrical Components & Equipment -- 0.1% 575,000(a) General Cable Corp., 4.5%, 11/15/29 $ 609,500 ---------------- Total Capital Goods $ 609,500 -------------------------------------------------------------------------------------------------------------- ENERGY -- 0.3% Oil & Gas Storage & Transportation -- 0.3% 1,375,000 Golar LNG, Ltd., 2.75%, 2/15/22 $ 1,539,938 ---------------- Total Energy $ 1,539,938 -------------------------------------------------------------------------------------------------------------- HEALTH CARE EQUIPMENT & SERVICES -- 0.3% Health Care Equipment -- 0.3% 875,000 NuVasive, Inc., 2.25%, 3/15/21 $ 963,047 575,000 Wright Medical Group, Inc., 2.0%, 2/15/20 577,875 ---------------- Total Health Care Equipment & Services $ 1,540,922 -------------------------------------------------------------------------------------------------------------- MATERIALS -- 0.4% Construction Materials -- 0.2% 850,000 Cemex SAB de CV, 3.72%, 3/15/20 $ 871,250 -------------------------------------------------------------------------------------------------------------- Diversified Metals & Mining -- 0.2% IDR11,178,198,000^ PT Bakrie & Brothers Tbk, 0.0% 12/30/99 $ 803,464 ---------------- Total Materials $ 1,674,714 -------------------------------------------------------------------------------------------------------------- MEDIA -- 0.3% Cable & Satellite -- 0.3% 2,148,000 DISH Network Corp., 2.375%, 3/15/24 $ 1,853,426 ---------------- Total Media $ 1,853,426 -------------------------------------------------------------------------------------------------------------- PHARMACEUTICALS, BIOTECHNOLOGY & LIFE SCIENCES -- 0.4% Biotechnology -- 0.3% 628,000 Alder Biopharmaceuticals, Inc., 2.5%, 2/1/25 $ 618,203 827,000 Insmed, Inc., 1.75%, 1/15/25 770,997 ---------------- $ 1,389,200 -------------------------------------------------------------------------------------------------------------- Pharmaceuticals -- 0.1% 700,000 Medicines Co., 2.75%, 7/15/23 $ 647,351 ---------------- Total Pharmaceuticals, Biotechnology & Life Sciences $ 2,036,551 -------------------------------------------------------------------------------------------------------------- SOFTWARE & SERVICES -- 0.1% Application Software -- 0.1% 283,000 Citrix Systems, Inc., 0.5%, 4/15/19 $ 406,244 ---------------- Total Software & Services $ 406,244 -------------------------------------------------------------------------------------------------------------- TOTAL CONVERTIBLE CORPORATE BONDS (Cost $9,727,374) $ 9,661,295 -------------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 16 Pioneer Global High Yield Fund | Semiannual Report | 4/30/18 -------------------------------------------------------------------------------------------------------------- Shares Value -------------------------------------------------------------------------------------------------------------- PREFERRED STOCK -- 0.4% of Net Assets DIVERSIFIED FINANCIALS -- 0.4% Consumer Finance -- 0.4% 76,924(b) GMAC Capital Trust I, 7.624% (3 Month USD LIBOR + 579 bps), 2/15/40 $ 2,045,409 ---------------- Total Diversified Financials $ 2,045,409 -------------------------------------------------------------------------------------------------------------- TOTAL PREFERRED STOCK (Cost $1,807,205) $ 2,045,409 -------------------------------------------------------------------------------------------------------------- CONVERTIBLE PREFERRED STOCKS -- 1.0% of Net Assets BANKS -- 1.0% Diversified Banks -- 1.0% 2,354(c) Bank of America Corp., 7.25% $ 2,996,642 2,000(c) Wells Fargo & Co., 7.5% 2,561,220 ---------------- Total Banks $ 5,557,862 -------------------------------------------------------------------------------------------------------------- TOTAL CONVERTIBLE PREFERRED STOCKS (Cost $5,437,943) $ 5,557,862 -------------------------------------------------------------------------------------------------------------- COMMON STOCKS -- 0.5% of Net Assets CAPITAL GOODS -- 0.0%+ Construction & Engineering -- 0.0%+ 6,013,974(d) Abengoa SA, Class B $ 72,655 -------------------------------------------------------------------------------------------------------------- Industrial Machinery -- 0.0%+ 156,027^(d) Liberty Tire Recycling LLC $ 1,560 ---------------- Total Capital Goods $ 74,215 -------------------------------------------------------------------------------------------------------------- CONSUMER DURABLES & APPAREL -- 0.0%+ Homebuilding -- 0.0%+ 1,443,476(d) Desarrolladora Homex SAB de CV $ 13,730 ---------------- Total Consumer Durables & Apparel $ 13,730 -------------------------------------------------------------------------------------------------------------- ENERGY -- 0.5% Coal & Consumable Fuels -- 0.0%+ 13(d) Alpha Natural Resources Holdings, Inc. $ 328 -------------------------------------------------------------------------------------------------------------- Oil & Gas Exploration & Production -- 0.5% 5,735,146^(d) Ascent CNR Corp. $ 1,233,057 39,631(d) Frontera Energy Corp. 1,221,229 1,071(d) Midstates Petroleum Co., Inc. 14,983 203(d) SilverBow Resources, Inc. 6,222 ---------------- $ 2,475,491 ---------------- Total Energy $ 2,475,819 -------------------------------------------------------------------------------------------------------------- MATERIALS -- 0.0%+ Forest Products -- 0.0%+ 459,481(d) Emerald Plantation Holdings, Ltd. $ 36,759 -------------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Global High Yield Fund | Semiannual Report | 4/30/18 17 Schedule of Investments | 4/30/18 (unaudited) (continued) -------------------------------------------------------------------------------------------------------------- Shares Value -------------------------------------------------------------------------------------------------------------- Steel -- 0.0%+ 49(d) ANR, Inc., Class C $ 1,241 ---------------- Total Materials $ 38,000 -------------------------------------------------------------------------------------------------------------- TOTAL COMMON STOCKS (Cost $12,628,454) $ 2,601,764 -------------------------------------------------------------------------------------------------------------- -------------------------------------------------------------------------------------------------------------- Principal Amount USD ($) -------------------------------------------------------------------------------------------------------------- ASSET BACKED SECURITY -- 0.1% of Net Assets BANKS -- 0.1% Thrifts & Mortgage Finance -- 0.1% 450,000 InSite Issuer LLC, Series 2016-1A, Class C, 6.414%, 11/15/46 (144A) $ 448,790 ---------------- Total Banks $ 448,790 -------------------------------------------------------------------------------------------------------------- TOTAL ASSET BACKED SECURITY (Cost $450,000) $ 448,790 -------------------------------------------------------------------------------------------------------------- COLLATERALIZED MORTGAGE OBLIGATIONS -- 1.1% of Net Assets BANKS -- 1.1% Diversified Banks -- 0.1% 850,000(b) Wells Fargo Commercial Mortgage Trust, Series 2014-LC18, Class D, 3.957%, 12/15/47 (144A) $ 711,010 -------------------------------------------------------------------------------------------------------------- Thrifts & Mortgage Finance -- 1.0% 630,000(b) BAMLL Commercial Mortgage Securities Trust, Series 2016-FR14, Class C, 1.374%, 2/27/48 (144A) $ 576,450 549,968(b) Banc of America Commercial Mortgage Trust, Series 2007-4, Class D, 6.07%, 2/10/51 (144A) 553,366 1,500,000(b) Citigroup Commercial Mortgage Trust, Series 2014-GC23, Class E, 3.208%, 7/10/47 (144A) 977,778 1,480,000(b) COBALT CMBS Commercial Mortgage Trust, Series 2007-C3, Class B, 6.001%, 5/15/46 1,478,091 455,000(b) COBALT CMBS Commercial Mortgage Trust, Series 2007-C3, Class C, 6.001%, 5/15/46 320,429 750,000(e) Commercial Mortgage Trust, Series 2014-FL5, Class D, 5.897% (1 Month USD LIBOR + 400 bps), 10/15/31 (144A) 712,333 500,000(b) Wachovia Bank Commercial Mortgage Trust, Series 2006-C27, Class B, 5.865%, 7/15/45 498,922 ---------------- $ 5,117,369 ---------------- Total Banks $ 5,828,379 -------------------------------------------------------------------------------------------------------------- TOTAL COLLATERALIZED MORTGAGE OBLIGATIONS (Cost $5,876,441) $ 5,828,379 -------------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 18 Pioneer Global High Yield Fund | Semiannual Report | 4/30/18 -------------------------------------------------------------------------------------------------------------- Principal Amount USD ($) Value -------------------------------------------------------------------------------------------------------------- CORPORATE BONDS -- 81.7% of Net Assets AUTOMOBILES & COMPONENTS -- 1.5% Auto Parts & Equipment -- 0.6% 2,035,000 Dana Financing Luxembourg S.a.r.l., 6.5%, 6/1/26 (144A) $ 2,111,313 877,000 TI Group Automotive Systems LLC, 8.75%, 7/15/23 (144A) 920,850 ---------------- $ 3,032,163 -------------------------------------------------------------------------------------------------------------- Automobile Manufacturers -- 0.9% EUR 2,378,000 LKQ European Holdings BV, 3.625%, 4/1/26 (144A) $ 2,869,075 EUR 1,534,000 LKQ European Holdings BV, 4.125%, 4/1/28 1,832,803 ---------------- $ 4,701,878 ---------------- Total Automobiles & Components $ 7,734,041 -------------------------------------------------------------------------------------------------------------- BANKS -- 6.0% Diversified Banks -- 3.9% 800,000 Access Bank Plc, 10.5%, 10/19/21 (144A) $ 891,744 1,150,000 Alcbank TAS, 5.125%, 3/31/25 1,089,117 2,000,000(b)(c) Alfa Bank AO Via Alfa Bond Issuance Plc, 8.0% (5 Year USD Swap Rate + 666 bps) 1,970,400 ARS 8,000,000(e) Banco de la Ciudad de Buenos Aires, 0.0% (BADLARPP + 399 bps) 12/5/22 408,707 1,175,000(b)(c) Banco do Brasil SA, 9.0% (5 Year CMT Index + 636 bps) 1,243,620 295,000(b) Banco Nacional de Comercio Exterior SNC, 3.8% (5 Year CMT Index + 300 bps), 8/11/26 (144A) 289,321 725,000(b) BBVA Bancomer SA, 5.125% (5 Year CMT Index + 265 bps), 1/18/33 (144A) 684,219 1,385,000(b)(c) BNP Paribas SA, 7.625% (5 Year USD Swap Rate + 631 bps) (144A) 1,491,991 2,885,000(b)(c) ING Groep NV, 6.5% (5 Year USD Swap Rate + 445 bps) 2,969,530 EUR 970,000(b)(c) Lloyds Banking Group Plc, 6.375% (5 Year EUR Swap Rate + 529 bps) 1,274,394 1,575,000 QNB Finansbank AS, 4.875%, 5/19/22 (144A) 1,506,746 1,773,000(b)(c) Royal Bank of Scotland Group Plc, 8.0% (5 Year USD Swap Rate + 572 bps) 1,939,219 1,570,000(b)(c) Royal Bank of Scotland Group Plc, 8.625% (5 Year USD Swap Rate + 760 bps) 1,719,150 750,000 Sberbank of Russia Via SB Capital SA, 5.25%, 5/23/23 (144A) 744,375 2,140,000(b)(c) Societe Generale SA, 7.375% (5 Year USD Swap Rate + 624 bps) (144A) 2,268,400 9,000(b) Turkiye Vakiflar Bankasi TAO, 8.0% (5 Year USD Swap Rate + 585 bps), 11/1/27 (144A) 9,154 ---------------- $ 20,500,087 -------------------------------------------------------------------------------------------------------------- Supranational -- 1.4% INR 28,480,000 Asian Development Bank, 5.9%, 12/20/22 $ 415,903 INR 134,290,000 Asian Development Bank, 6.2%, 10/6/26 1,944,102 The accompanying notes are an integral part of these financial statements. Pioneer Global High Yield Fund | Semiannual Report | 4/30/18 19 Schedule of Investments | 4/30/18 (unaudited) (continued) -------------------------------------------------------------------------------------------------------------- Principal Amount USD ($) Value -------------------------------------------------------------------------------------------------------------- Supranational (continued) INR 108,160,000 Asian Development Bank, 6.45%, 8/8/21 $ 1,616,278 290,000 Banque Ouest Africaine de Developpement, 5.0%, 7/27/27 (144A) 284,635 2,386,000 Banque Ouest Africaine de Developpement, 5.5%, 5/6/21 (144A) 2,454,598 ARS 16,270,000(f) European Bank for Reconstruction & Development, 2/1/19 665,779 ---------------- $ 7,381,295 -------------------------------------------------------------------------------------------------------------- Thrifts & Mortgage Finance -- 0.7% 2,615,000 Financiera Independencia SAB de CV SOFOM ENR, 8.0%, 7/19/24 (144A) $ 2,543,087 1,122,000 Provident Funding Associates LP / PFG Finance Corp., 6.375%, 6/15/25 (144A) 1,128,261 ---------------- $ 3,671,348 ---------------- Total Banks $ 31,552,730 -------------------------------------------------------------------------------------------------------------- CAPITAL GOODS -- 4.6% Aerospace & Defense -- 0.8% EUR 3,615,000 TA MFG, Ltd., 3.625%, 4/15/23 (144A) $ 4,443,600 -------------------------------------------------------------------------------------------------------------- Agricultural & Farm Machinery -- 0.0%+ 145,000 Titan International, Inc., 6.5%, 11/30/23 (144A) $ 147,175 -------------------------------------------------------------------------------------------------------------- Construction & Engineering -- 0.3% 1,475,000 Amsted Industries, Inc., 5.375%, 9/15/24 (144A) $ 1,478,687 -------------------------------------------------------------------------------------------------------------- Construction & Farm Machinery & Heavy Trucks -- 0.4% EUR 735,000 Loxam SAS, 4.25%, 4/15/24 (144A) $ 939,233 EUR 705,000 Loxam SAS, 6.0%, 4/15/25 (144A) 921,976 ---------------- $ 1,861,209 -------------------------------------------------------------------------------------------------------------- Electrical Components & Equipment -- 0.6% 765,000 Exterran Energy Solutions LP / EES Finance Corp., 8.125%, 5/1/25 $ 810,900 2,000,000 General Cable Corp., 5.75%, 10/1/22 2,053,500 ---------------- $ 2,864,400 -------------------------------------------------------------------------------------------------------------- Heavy Electrical Equipment -- 0.9% EUR 3,974,000 Platin 1426 GmbH, 5.375%, 6/15/23 (144A) $ 4,760,421 -------------------------------------------------------------------------------------------------------------- Industrial Conglomerates -- 0.1% 485,000 Park-Ohio Industries, Inc., 6.625%, 4/15/27 $ 503,188 -------------------------------------------------------------------------------------------------------------- Industrial Machinery -- 0.4% EUR 1,865,000 Colfax Corp., 3.25%, 5/15/25 (144A) $ 2,273,835 -------------------------------------------------------------------------------------------------------------- Trading Companies & Distributors -- 1.1% 1,197,000 H&E Equipment Services, Inc., 5.625%, 9/1/25 $ 1,202,985 1,500,000 United Rentals North America, Inc., 4.625%, 10/15/25 1,455,015 1,500,000 United Rentals North America, Inc., 4.875%, 1/15/28 1,421,250 The accompanying notes are an integral part of these financial statements. 20 Pioneer Global High Yield Fund | Semiannual Report | 4/30/18 -------------------------------------------------------------------------------------------------------------- Principal Amount USD ($) Value -------------------------------------------------------------------------------------------------------------- Trading Companies & Distributors (continued) 1,690,000 WESCO Distribution, Inc., 5.375%, 12/15/21 $ 1,715,350 5,794,600 ---------------- Total Capital Goods $ 24,127,115 -------------------------------------------------------------------------------------------------------------- COMMERCIAL & PROFESSIONAL SERVICES -- 0.3% Diversified Support Services -- 0.3% EUR 1,200,000 Novafives SAS, 5.0%, 6/15/25 (144A) $ 1,476,018 ---------------- Total Commercial & Professional Services $ 1,476,018 -------------------------------------------------------------------------------------------------------------- COMMERCIAL SERVICES & SUPPLIES -- 0.1% Environmental & Facilities Services -- 0.1% 745,000 Clean Harbors, Inc., 5.125%, 6/1/21 $ 749,656 ---------------- Total Commercial Services & Supplies $ 749,656 -------------------------------------------------------------------------------------------------------------- CONSUMER DURABLES & APPAREL -- 2.0% Homebuilding -- 2.0% 2,237,897(g) Abengoa Abenewco 2 SAU, 1.5% (1.25% PIK 0.25% cash), 3/31/23 (144A) $ 262,953 1,000,000 Beazer Homes USA, Inc., 5.875%, 10/15/27 915,000 1,984,000 Beazer Homes USA, Inc., 6.75%, 3/15/25 1,949,280 1,345,000 KB Home, 7.0%, 12/15/21 1,427,381 2,079,000 Lennar Corp., 4.75%, 11/15/22 2,081,225 1,050,000 Meritage Homes Corp., 6.0%, 6/1/25 (144A) 1,082,812 1,625,000 Taylor Morrison Communities, Inc. / Taylor Morrison Holdings II, Inc., 5.875%, 4/15/23 (144A) 1,661,563 1,150,000 TRI Pointe Group, Inc., 5.25%, 6/1/27 1,092,500 ---------------- Total Consumer Durables & Apparel $ 10,472,714 -------------------------------------------------------------------------------------------------------------- CONSUMER SERVICES -- 3.9% Casinos & Gaming -- 2.6% EUR 1,870,000 Codere Finance 2 Luxembourg SA, 6.75%, 11/1/21 (144A) $ 2,364,649 1,355,000 Codere Finance 2 Luxembourg SA, 7.625%, 11/1/21 (144A) 1,382,371 1,370,000 Golden Nugget, Inc., 8.75%, 10/1/25 (144A) 1,431,650 EUR 2,125,000 Intralot Capital Luxembourg SA, 5.25%, 9/15/24 (144A) 2,574,400 EUR 1,124,000 Scientific Games International, Inc., 3.375%, 2/15/26 (144A) 1,314,821 EUR 1,312,000 Scientific Games International, Inc., 5.5%, 2/15/26 (144A) 1,515,682 2,981,000 Scientific Games International, Inc., 10.0%, 12/1/22 3,212,922 ---------------- $ 13,796,495 -------------------------------------------------------------------------------------------------------------- Hotels, Resorts & Cruise Lines -- 0.9% 515,000 Grupo Posadas SAB de CV, 7.875%, 6/30/22 (144A) $ 535,600 500,000 Silversea Cruise Finance, Ltd., 7.25%, 2/1/25 (144A) 528,900 3,727,000 Viking Cruises, Ltd., 5.875%, 9/15/27 (144A) 3,596,555 ---------------- $ 4,661,055 -------------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Global High Yield Fund | Semiannual Report | 4/30/18 21 Schedule of Investments | 4/30/18 (unaudited) (continued) -------------------------------------------------------------------------------------------------------------- Principal Amount USD ($) Value -------------------------------------------------------------------------------------------------------------- Specialized Consumer Services -- 0.4% 1,350,000 Aegea Finance S.a.r.l., 5.75%, 10/10/24 (144A) $ 1,333,125 1,140,000 Ashtead Capital, Inc., 4.125%, 8/15/25 (144A) 1,083,000 ---------------- 2,416,125 ---------------- Total Consumer Services $ 20,873,675 -------------------------------------------------------------------------------------------------------------- DIVERSIFIED FINANCIALS -- 5.7% Asset Management & Custody Banks -- 0.4% 2,454,000 Banco BTG Pactual SA, 5.5%, 1/31/23 (144A) $ 2,392,650 -------------------------------------------------------------------------------------------------------------- Consumer Finance -- 1.7% 3,201,000 Alpha Holding SA de CV, 10.0%, 12/19/22 (144A) $ 3,111,372 1,925,000 Credito Real SAB de CV SOFOM ER, 7.25%, 7/20/23 (144A) 1,980,440 INR 240,670,000 International Finance Corp., 8.25%, 6/10/21 3,770,002 ---------------- $ 8,861,814 -------------------------------------------------------------------------------------------------------------- Diversified Capital Markets -- 1.6% 759,000(b)(c) Credit Suisse Group AG, 7.125% (5 Year USD Swap Rate + 511 bps) $ 796,191 2,230,000 Freedom Mortgage Corp., 8.125%, 11/15/24 (144A) 2,230,000 1,565,000 Freedom Mortgage Corp., 8.25%, 4/15/25 (144A) 1,565,000 1,800,000 Oxford Finance LLC / Oxford Finance Co-Issuer II, Inc., 6.375%, 12/15/22 (144A) 1,836,000 1,775,000(b)(c) UBS Group AG, 7.125% (5 Year USD Swap Rate + 588 bps) 1,879,281 ---------------- $ 8,306,472 -------------------------------------------------------------------------------------------------------------- Specialized Finance -- 2.0% 1,500,000 Cantor Fitzgerald LP, 7.875%, 10/15/19 (144A) $ 1,584,019 1,185,000 Nationstar Mortgage LLC / Nationstar Capital Corp., 6.5%, 7/1/21 1,199,813 4,500,000 Nationstar Mortgage LLC / Nationstar Capital Corp., 6.5%, 6/1/22 4,623,750 3,300,000 Nova Austral SA, 8.25%, 5/26/21 (144A) 3,277,134 ---------------- $ 10,684,716 ---------------- Total Diversified Financials $ 30,245,652 -------------------------------------------------------------------------------------------------------------- ENERGY -- 12.8% Integrated Oil & Gas -- 2.6% 445,000 Ascent Resources Utica Holdings LLC / ARU Finance Corp., 10.0%, 4/1/22 (144A) $ 478,375 5,725,000 Petrobras Global Finance BV, 5.299%, 1/27/25 (144A) 5,630,538 256,000 Petrobras Global Finance BV, 6.25%, 3/17/24 269,312 700,000(e) Petroleos Mexicanos, 5.721% (3 Month USD LIBOR + 365 bps), 3/11/22 764,050 1,100,000 Petroleum Co. of Trinidad & Tobago, Ltd., 9.75%, 8/14/19 (144A) 1,157,750 4,475,000 YPF SA, 6.95%, 7/21/27 (144A) 4,402,281 ARS 22,125,000 YPF SA, 16.5%, 5/9/22 (144A) 999,662 ---------------- $ 13,701,968 -------------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 22 Pioneer Global High Yield Fund | Semiannual Report | 4/30/18 -------------------------------------------------------------------------------------------------------------- Principal Amount USD ($) Value -------------------------------------------------------------------------------------------------------------- Oil & Gas Drilling -- 0.4% 1,070,000 Shelf Drilling Holdings, Ltd., 8.25%, 2/15/25 (144A) $ 1,086,050 1,170,000 Trinidad Drilling, Ltd., 6.625%, 2/15/25 (144A) 1,121,738 ---------------- $ 2,207,788 -------------------------------------------------------------------------------------------------------------- Oil & Gas Equipment & Services -- 0.8% 1,117,000 Archrock Partners LP / Archrock Partners Finance Corp., 6.0%, 4/1/21 $ 1,114,207 1,000,000 Archrock Partners LP / Archrock Partners Finance Corp., 6.0%, 10/1/22 1,000,000 1,118,000 Calfrac Holdings LP, 7.5%, 12/1/20 (144A) 1,106,820 600,000 FTS International, Inc., 6.25%, 5/1/22 603,750 505,000 SESI LLC, 7.75%, 9/15/24 (144A) 522,675 ---------------- $ 4,347,452 -------------------------------------------------------------------------------------------------------------- Oil & Gas Exploration & Production -- 4.8% 525,000 Centennial Resource Production LLC, 5.375%, 1/15/26 (144A) $ 521,063 167,000 Chesapeake Energy Corp., 8.0%, 12/15/22 (144A) 177,020 901,000 Covey Park Energy LLC / Covey Park Finance Corp., 7.5%, 5/15/25 (144A) 905,505 850,000 Extraction Oil & Gas, Inc., 7.375%, 5/15/24 (144A) 888,250 1,380,000 Great Western Petroleum LLC / Great Western Finance Corp., 9.0%, 9/30/21 (144A) 1,421,400 1,055,000 Gulfport Energy Corp., 6.0%, 10/15/24 1,002,250 212,000 Halcon Resources Corp., 6.75%, 2/15/25 211,735 1,040,000 Hilcorp Energy I LP / Hilcorp Finance Co., 5.0%, 12/1/24 (144A) 1,011,400 620,000 Jagged Peak Energy LLC, 5.875%, 5/1/26 (144A) 622,325 575,000 MEG Energy Corp., 6.5%, 1/15/25 (144A) 575,115 1,460,000 MEG Energy Corp., 7.0%, 3/31/24 (144A) 1,310,350 3,415,000 Nostrum Oil & Gas Finance BV, 7.0%, 2/16/25 (144A) 3,281,815 1,965,000 Nostrum Oil & Gas Finance BV, 8.0%, 7/25/22 (144A) 1,999,678 1,515,000 Oasis Petroleum, Inc., 6.875%, 3/15/22 1,560,450 320,000 Parsley Energy LLC / Parsley Finance Corp., 5.25%, 8/15/25 (144A) 319,200 1,460,000 Parsley Energy LLC / Parsley Finance Corp., 5.375%, 1/15/25 (144A) 1,463,650 600,000 Parsley Energy LLC / Parsley Finance Corp., 5.625%, 10/15/27 (144A) 607,500 250,000 Parsley Energy LLC / Parsley Finance Corp., 6.25%, 6/1/24 (144A) 261,250 2,727,000 Sanchez Energy Corp., 6.125%, 1/15/23 1,969,439 615,000 Sanchez Energy Corp., 7.25%, 2/15/23 (144A) 621,150 1,873,000 SEPLAT Petroleum Development Co. Plc, 9.25%, 4/1/23 (144A) 1,896,787 200,000 SM Energy Co., 6.125%, 11/15/22 202,000 The accompanying notes are an integral part of these financial statements. Pioneer Global High Yield Fund | Semiannual Report | 4/30/18 23 Schedule of Investments | 4/30/18 (unaudited) (continued) -------------------------------------------------------------------------------------------------------------- Principal Amount USD ($) Value -------------------------------------------------------------------------------------------------------------- Oil & Gas Exploration & Production (continued) 945,000 SM Energy Co., 6.75%, 9/15/26 $ 961,538 810,000 SRC Energy, Inc., 6.25%, 12/1/25 (144A) 818,100 800,000 Whiting Petroleum Corp., 6.625%, 1/15/26 (144A) 820,000 ---------------- $ 25,428,970 -------------------------------------------------------------------------------------------------------------- Oil & Gas Refining & Marketing -- 0.6% 1,790,000 Calumet Specialty Products Partners LP / Calumet Finance Corp., 6.5%, 4/15/21 $ 1,767,625 792,632(e) EP PetroEcuador via Noble Sovereign Funding I, Ltd., 7.925% (3 Month USD LIBOR + 563 bps), 9/24/19 792,473 415,000 PBF Holding Co., LLC / PBF Finance Corp., 7.0%, 11/15/23 428,488 ---------------- $ 2,988,586 -------------------------------------------------------------------------------------------------------------- Oil & Gas Storage & Transportation -- 3.6% 2,447,000 Cheniere Corpus Christi Holdings LLC, 5.125%, 6/30/27 $ 2,385,825 1,730,000 Cheniere Energy Partners LP, 5.25%, 10/1/25 (144A) 1,691,075 1,500,000 Delek Logistics Partners LP, 6.75%, 5/15/25 (144A) 1,488,750 868,000 Energy Transfer Equity LP, 5.5%, 6/1/27 868,000 1,085,000 Energy Transfer Equity LP, 5.875%, 1/15/24 1,108,056 1,110,000 Genesis Energy LP / Genesis Energy Finance Corp., 6.25%, 5/15/26 1,060,050 1,395,000 Genesis Energy LP / Genesis Energy Finance Corp., 6.5%, 10/1/25 1,370,587 1,820,000 Global Partners LP / GLP Finance Corp., 7.0%, 6/15/23 1,838,200 1,000,000(e) Golar LNG Partners LP, 8.089% (3 Month USD LIBOR + 625 bps), 5/18/21 (144A) 1,015,039 1,735,000 Hess Infrastructure Partners LP / Hess Infrastructure Partners Finance Corp., 5.625%, 2/15/26 (144A) 1,752,350 400,000 Sunoco LP / Sunoco Finance Corp., 5.875%, 3/15/28 (144A) 388,500 2,150,000 Targa Resources Partners LP / Targa Resources Partners Finance Corp., 4.25%, 11/15/23 2,031,750 559,000 Targa Resources Partners LP / Targa Resources Partners Finance Corp., 5.0%, 1/15/28 (144A) 517,075 1,375,000 Williams Cos., Inc., 4.55%, 6/24/24 1,369,844 ---------------- $ 18,885,101 ---------------- Total Energy $ 67,559,865 -------------------------------------------------------------------------------------------------------------- FOOD & STAPLES RETAILING -- 0.2% Food Retail -- 0.2% 1,285,000 C&S Group Enterprises LLC, 5.375%, 7/15/22 (144A) $ 1,207,900 ---------------- Total Food & Staples Retailing $ 1,207,900 -------------------------------------------------------------------------------------------------------------- FOOD, BEVERAGE & TOBACCO -- 6.1% Packaged Foods & Meats -- 5.8% GBP 1,170,000 Boparan Finance Plc, 5.5%, 7/15/21 (144A) $ 1,526,388 735,000(h) CFG Investment SAC, 9.75%, 7/30/19 (144A) 797,475 EUR 1,353,000 Darling Global Finance BV, 4.75%, 5/30/22 (144A) 1,675,587 The accompanying notes are an integral part of these financial statements. 24 Pioneer Global High Yield Fund | Semiannual Report | 4/30/18 -------------------------------------------------------------------------------------------------------------- Principal Amount USD ($) Value -------------------------------------------------------------------------------------------------------------- Packaged Foods & Meats (continued) 950,000 JBS Investments GmbH, 7.25%, 4/3/24 (144A) $ 936,652 3,135,000 JBS USA LUX SA / JBS USA Finance, Inc., 5.75%, 6/15/25 (144A) 2,945,959 2,350,000 JBS USA LUX SA / JBS USA Finance, Inc., 6.75%, 2/15/28 (144A) 2,256,000 3,020,000 MARB BondCo Plc, 6.875%, 1/19/25 (144A) 2,838,800 1,335,000 MARB BondCo Plc, 7.0%, 3/15/24 (144A) 1,276,607 3,923,000 Marfrig Holding Europe BV, 8.0%, 6/8/23 (144A) 3,967,134 6,591,000 Minerva Luxembourg SA, 5.875%, 1/19/28 (144A) 5,880,490 1,560,000 Minerva Luxembourg SA, 6.5%, 9/20/26 (144A) 1,474,200 2,575,000 Pesquera Exalmar SAA, 7.375%, 1/31/20 (144A) 2,549,250 EUR 1,206,000 Picard Bonco, 5.5%, 11/30/24 1,434,590 581,000 Pilgrim's Pride Corp., 5.875%, 9/30/27 (144A) 554,855 1,226,687(h) Tonon Luxembourg SA, 10.5%, 5/14/24 (144A) 503,025 ---------------- $ 30,617,012 -------------------------------------------------------------------------------------------------------------- Tobacco -- 0.3% 535,000 Alliance One International, Inc., 8.5%, 4/15/21 (144A) $ 552,387 1,350,000 Alliance One International, Inc., 9.875%, 7/15/21 1,279,125 ---------------- $ 1,831,512 ---------------- Total Food, Beverage & Tobacco $ 32,448,524 -------------------------------------------------------------------------------------------------------------- HEALTH CARE EQUIPMENT & SERVICES -- 3.2% Health Care Facilities -- 0.8% 495,000 CHS/Community Health Systems, Inc., 6.25%, 3/31/23 $ 451,687 2,015,000 CHS/Community Health Systems, Inc., 6.875%, 2/1/22 1,093,742 1,300,000 Kindred Healthcare, Inc., 6.375%, 4/15/22 1,334,125 1,275,000 RegionalCare Hospital Partners Holdings, Inc., 8.25%, 5/1/23 (144A) 1,338,368 ---------------- $ 4,217,922 -------------------------------------------------------------------------------------------------------------- Health Care Services -- 0.6% 1,887,000 Rede D'or Finance S.a.r.l., 4.95%, 1/17/28 (144A) $ 1,743,116 1,430,000 Team Health Holdings, Inc., 6.375%, 2/1/25 (144A) 1,244,100 155,000 Universal Hospital Services, Inc., 7.625%, 8/15/20 156,163 ---------------- $ 3,143,379 -------------------------------------------------------------------------------------------------------------- Health Care Technology -- 0.5% EUR 2,200,000 IQVIA, Inc., 3.25%, 3/15/25 (144A) $ 2,697,714 -------------------------------------------------------------------------------------------------------------- Managed Health Care -- 1.3% 1,840,000 Centene Corp., 4.75%, 5/15/22 $ 1,858,400 1,550,000 Centene Corp., 5.625%, 2/15/21 1,590,687 3,155,000 WellCare Health Plans, Inc., 5.25%, 4/1/25 3,171,091 ---------------- $ 6,620,178 ---------------- Total Health Care Equipment & Services $ 16,679,193 -------------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Global High Yield Fund | Semiannual Report | 4/30/18 25 Schedule of Investments | 4/30/18 (unaudited) (continued) -------------------------------------------------------------------------------------------------------------- Principal Amount USD ($) Value -------------------------------------------------------------------------------------------------------------- HOUSEHOLD & PERSONAL PRODUCTS -- 0.4% Household Cleaning Supplies -- 0.3% EUR 1,400,000 Diamond BC BV, 5.625%, 8/15/25 (144A) $ 1,616,160 -------------------------------------------------------------------------------------------------------------- Personal Products -- 0.1% 420,000 Revlon Consumer Products Corp., 6.25%, 8/1/24 $ 252,000 ---------------- Total Household & Personal Products $ 1,868,160 -------------------------------------------------------------------------------------------------------------- INSURANCE -- 3.5% Reinsurance -- 3.5% 1,300,000+(i)(j) Arlington Re 2015, Variable Rate Notes, 8/1/18 $ 63,180 1,315,315+(i)(j) Berwick Re 2018-1, Variable Rate Notes, 12/31/21 1,337,149 250,000+(i)(j) Blue Lotus Re 2018, Variable Rate Notes, 12/31/21 259,475 500,000(e) Caelus Re V 2017-1 D, 11.057% (3 Month U.S. Treasury Bill + 925 bps), 6/5/20 (144A) (Cat Bond) 7,400 3,900,000+(i)(j) Carnoustie Re 2015, Variable Rate Notes, 7/1/18 79,560 2,600,000+(i)(j) Carnoustie Re 2016, Variable Rate Notes, 11/30/20 281,320 800,000+(i)(j) Carnoustie Re 2017, Variable Rate Notes, 11/30/21 241,120 250,000+(i)(j) Carnoustie Re 2018, Variable Rate Notes, 12/31/21 255,200 300,000+(i)(j) Clarendon Re 2018, Variable Rate Notes, 1/15/19 263,460 600,000+(i)(j) Cypress Re 2017, Variable Rate Notes, 1/10/19 274,560 300,000+(i)(j) Cypress Re 2018-1, Variable Rate Notes, 1/15/19 283,110 250,000+(i)(j) Dartmouth Re 2018, Variable Rate Notes, 1/15/19 204,225 150,000+(i)(j) Eden Re II 2017-1 B, Variable Rate Notes, 3/22/21 (144A) 104,850 250,000+(i)(j) Eden Re II 2018-1 A, Variable Rate Notes, 3/22/22 (144A) 257,400 450,000+(i)(j) Eden Re II 2018-1 B, Variable Rate Notes, 3/22/22 (144A) 463,320 300,000(e) Galilei Re 2016-1, 6.968% (6 Month USD LIBOR + 545 bps), 1/8/20 (144A) (Cat Bond) 301,200 300,000(e) Galilei Re 2016-1, 8.048% (6 Month USD LIBOR + 653 bps), 1/8/20 (144A) (Cat Bond) 302,910 250,000(e) Galilei Re 2016-1, 9.928% (6 Month USD LIBOR + 841 bps), 1/8/20 (144A) (Cat Bond) 251,475 300,000(e) Galilei Re 2017-1, 8.068% (6 Month USD LIBOR + 653 bps), 1/8/21 (144A) (Cat Bond) 303,630 1,600,000+(i)(j) Gleneagles Re 2016, Variable Rate Notes, 11/30/20 187,520 250,000+(i)(j) Gleneagles Re 2018, Variable Rate Notes, 12/31/21 257,300 300,000+(i)(j) Gloucester Re 2018, Variable Rate Notes, 1/15/19 218,880 1,000,000+(i)(j) Harambee Re 2018, Variable Rate Notes, 12/31/21 1,003,900 250,000(e) International Bank for Reconstruction & Development, 7.593% (3 Month USD LIBOR + 600 bps), 2/15/21 (144A) (Cat Bond) 248,735 250,000(e) International Bank for Reconstruction & Development, 9.841% (3 Month USD LIBOR + 825 bps), 2/14/20 (144A) (Cat Bond) 249,730 250,000+(e) International Bank for Reconstruction & Development, 13.126% (6 Month USD LIBOR + 1,150 bps), 7/15/20 (144A) (Cat Bond) 249,825 The accompanying notes are an integral part of these financial statements. 26 Pioneer Global High Yield Fund | Semiannual Report | 4/30/18 -------------------------------------------------------------------------------------------------------------- Principal Amount USD ($) Value -------------------------------------------------------------------------------------------------------------- Reinsurance (continued) 326,836+(i)(j) Kilarney Re 2018, Variable Rate Notes, 4/15/19 $ 336,968 500,000(e) Kilimanjaro II Re 2017, 11.672% (6 Month USD LIBOR + 949 bps), 4/20/21 (144A) (Cat Bond) 503,850 300,000+(i)(j) Kingsbarns Re 2017, Variable Rate Notes, 5/15/18 206,190 250,000+(i)(j) Limestone Re 2016,Class A Non Voting, Variable Rate Notes, 8/31/21 240,250 250,000+(i)(j) Limestone Re 2016, Class A Voting, Variable Rate Notes, 8/31/21 240,250 1,100,000+(i)(j) Lorenz Re 2016, Variable Rate Notes, 3/31/19 14,960 450,000+(i)(j) Lorenz Re 2017, Variable Rate Notes, 3/31/20 390,420 490,000+(i)(j) Madison Re 2016, Variable Rate Notes, 3/31/19 31,115 300,000+(i)(j) Madison Re 2017, Variable Rate Notes, 3/31/19 79,170 250,000+(i)(j) Madison Re 2018, Variable Rate Notes, 12/31/21 258,225 250,000+(i)(j) Merion Re 2018, Variable Rate Notes, 12/31/21 217,975 600,000+(i)(j) Merion Re 2018-2, Variable Rate Notes, 12/31/21 633,000 400,000(e) Northshore Re II 2017, Ltd., 9.057% (3 Month U.S. Treasury Bill + 725 bps), 7/6/20 (144A) (Cat Bond) 402,800 250,000+(i)(j) Oakmont Re 2017, Variable Rate Notes, 4/13/18 229,850 250,000+(i)(j) Old Head Re 2018, Variable Rate Notes, 12/31/21 213,675 250,000+(i)(j) Oyster Bay Re 2018, Variable Rate Notes, 1/15/19 228,150 3,900,000+(i)(j) Pangaea Re 2015-1, Variable Rate Notes, 2/1/19 8,001 3,500,000+(i)(j) Pangaea Re 2016-1, Variable Rate Notes, 11/30/20 33,416 1,000,000+(i)(j) Pangaea Re 2016-2, Variable Rate Notes, 11/30/20 65,800 300,000+(i)(j) Pangaea Re 2018-1, Variable Rate Notes, 12/31/21 315,240 600,000+(i)(j) Pinehurst 2018-1, Variable Rate Notes, 1/15/19 573,060 300,000+(i)(j) Portrush Re 2017, Variable Rate Notes, 6/15/18 279,420 1,300,000+(i)(j) Prestwick Re 2015-1, Variable Rate Notes, 7/1/18 22,100 500,000(e) Residential Reinsurance 2016, 7.177% (3 Month U.S. Treasury Bill + 537 bps), 12/6/20 (144A) (Cat Bond) 494,750 400,000+(i)(j) Resilience Re, Variable Rate Notes, 1/8/19 (144A) 400,000 250,000+(i)(j) Resilience Re, Variable Rate Notes, 4/8/19 227,125 400,000+(i)(j) Resilience Re, Variable Rate Notes, 5/1/19 358,000 250,000+(i)(j) Seminole Re 2018, Variable Rate Notes, 1/15/19 224,150 500,000+(i)(j) St. Andrews Re 2017-1, Variable Rate Notes, 2/1/19 101,200 521,395+(i)(j) St. Andrews Re 2017-4, Variable Rate Notes, 6/1/19 572,700 250,000(e) Tailwind Re 2017, Ltd., 12.807% (3 Month U.S. Treasury Bill + 1,100 bps), 1/8/22 (144A) (Cat Bond) 252,950 250,000+(i)(j) Thopas Re 2018, Variable Rates Notes, 12/31/21 255,975 250,000(e) Ursa Re 2017, 5.25% (3 Month U.S. Treasury Bill + 525 bps), 12/10/20 (144A) (Cat Bond) 251,675 600,000(e) Ursa Re 2017, 7.807% (3 Month U.S. Treasury Bill + 600 bps), 5/27/20 (144A) (Cat Bond) 605,100 3,000,000+(i)(j) Versutus 2016-A, Variable Rate Notes, 11/30/20 24,600 600,000+(i)(j) Versutus 2017-A, Variable Rate Notes, 11/30/21 41,400 The accompanying notes are an integral part of these financial statements. Pioneer Global High Yield Fund | Semiannual Report | 4/30/18 27 Schedule of Investments | 4/30/18 (unaudited) (continued) -------------------------------------------------------------------------------------------------------------- Principal Amount USD ($) Value -------------------------------------------------------------------------------------------------------------- Reinsurance (continued) 300,000+(i)(j) Versutus 2018-A, Variable Rate Notes, 12/31/21 $ 304,170 250,000+(i)(j) Viribus Re 2018, Variable Rate Notes, 12/31/21 260,950 250,000+(i)(j) Wentworth 2017, Variable Rate Notes, 7/13/18 244,800 250,000+(i)(j) Woburn Re 2018, Variable Rate Notes, 12/31/21 256,250 ---------------- Total Insurance $ 18,350,114 -------------------------------------------------------------------------------------------------------------- MATERIALS -- 7.5% Aluminum -- 0.4% EUR 1,165,000 Constellium NV, 4.25%, 2/15/26 (144A) $ 1,422,707 375,000 Rusal Capital, DAC, 4.85%, 2/1/23 (144A) 120,000 2,650,000 Rusal Capital, DAC, 5.125%, 2/2/22 (144A) 848,000 ---------------- $ 2,390,707 -------------------------------------------------------------------------------------------------------------- Commodity Chemicals -- 0.1% 603,000 Hexion, Inc., 6.625%, 4/15/20 $ 566,066 -------------------------------------------------------------------------------------------------------------- Construction Materials -- 0.2% EUR 1,090,000 Cemex SAB de CV, 2.75%, 12/5/24 (144A) $ 1,308,625 -------------------------------------------------------------------------------------------------------------- Diversified Chemicals -- 1.4% EUR 625,000 Avantor, Inc., 4.75%, 10/1/24 (144A) $ 754,338 460,000 Blue Cube Spinco, Inc., 9.75%, 10/15/23 529,000 EUR 628,000 INEOS Finance Plc, 4.0%, 5/1/23 (144A) 773,944 2,840,000 Koks OAO Via Koks Finance, DAC, 7.5%, 5/4/22 (144A) 2,876,454 2,750,000 Nufarm Australia, Ltd. / Nufarm Americas, Inc., 5.75%, 4/30/26 (144A) 2,743,125 ---------------- $ 7,676,861 -------------------------------------------------------------------------------------------------------------- Diversified Metals & Mining -- 1.5% 810,000 Ausdrill Finance Pty, Ltd., 6.875%, 11/1/19 (144A) $ 818,100 1,080,000 Nexa Resources SA, 5.375%, 5/4/27 (144A) 1,082,700 1,218,000 Rain CII Carbon LLC / CII Carbon Corp., 7.25%, 4/1/25 (144A) 1,254,540 1,150,000 Vedanta Resources Plc, 6.375%, 7/30/22 (144A) 1,157,130 500,000 Vedanta Resources Plc, 7.125%, 5/31/23 510,000 3,045,000 Vedanta Resources Plc, 8.25%, 6/7/21 (144A) 3,269,721 ---------------- $ 8,092,191 -------------------------------------------------------------------------------------------------------------- Fertilizers & Agricultural Chemicals -- 0.2% EUR 729,000 OCI NV, 5.0%, 4/15/23 (144A) $ 896,482 -------------------------------------------------------------------------------------------------------------- Forest Products -- 0.4% 1,905,000 Eldorado Intl. Finance GmbH, 8.625%, 6/16/21 (144A) $ 2,019,300 -------------------------------------------------------------------------------------------------------------- Metal & Glass Containers -- 1.4% EUR 700,000(g) ARD Finance SA, 6.625% (7.375% PIK 0.0% cash), 9/15/23 $ 889,011 700,000(g) ARD Finance SA, 7.125% (7.875% PIK 0.0% cash), 9/15/23 715,750 590,000 Ardagh Packaging Finance Plc / Ardagh Holdings USA, Inc., 4.625%, 5/15/23 (144A) 591,475 The accompanying notes are an integral part of these financial statements. 28 Pioneer Global High Yield Fund | Semiannual Report | 4/30/18 -------------------------------------------------------------------------------------------------------------- Principal Amount USD ($) Value -------------------------------------------------------------------------------------------------------------- Metal & Glass Containers (continued) EUR 410,000 Ardagh Packaging Finance Plc / Ardagh Holdings USA, Inc., 6.75%, 5/15/24 (144A) $ 539,742 630,000 Ardagh Packaging Finance Plc / Ardagh Holdings USA, Inc., 7.25%, 5/15/24 (144A) 664,650 EUR 1,390,000 Crown European Holdings SA, 2.875%, 2/1/26 (144A) 1,654,070 EUR 725,000 Horizon Holdings I SAS, 7.25%, 8/1/23 (144A) 916,087 EUR 950,000 Verallia Packaging SASU, 5.125%, 8/1/22 (144A) 1,185,867 ---------------- $ 7,156,652 -------------------------------------------------------------------------------------------------------------- Silver -- 0.2% 1,040,000 Coeur Mining, Inc., 5.875%, 6/1/24 $ 1,024,400 -------------------------------------------------------------------------------------------------------------- Specialty Chemicals -- 0.1% 398,000 Ingevity Corp., 4.5%, 2/1/26 (144A) $ 383,573 -------------------------------------------------------------------------------------------------------------- Steel -- 1.6% 1,240,000 BlueScope Steel Finance, Ltd. / BlueScope Steel Finance USA LLC, 6.5%, 5/15/21 (144A) $ 1,280,300 770,000 Commercial Metals Co., 5.375%, 7/15/27 750,750 618,000 Commercial Metals Co., 5.75%, 4/15/26 (144A) 618,772 2,848,000 Metinvest BV, 7.75%, 4/23/23 (144A) 2,768,826 1,153,000(h) Samarco Mineracao SA, 4.125%, 11/1/22 (144A) 838,807 670,000 SunCoke Energy Partners LP / SunCoke Energy Partners Finance Corp., 7.5%, 6/15/25 (144A) 688,425 1,617,000 United States Steel Corp., 6.25%, 3/15/26 1,604,873 ---------------- $ 8,550,753 ---------------- Total Materials $ 40,065,610 -------------------------------------------------------------------------------------------------------------- MEDIA -- 3.1% Advertising -- 0.2% 1,125,000 MDC Partners, Inc., 6.5%, 5/1/24 (144A) $ 1,106,719 -------------------------------------------------------------------------------------------------------------- Cable & Satellite -- 2.0% 320,000 Altice Financing SA, 6.625%, 2/15/23 (144A) $ 320,000 1,900,000 CCO Holdings LLC / CCO Holdings Capital Corp., 5.125%, 5/1/27 (144A) 1,780,243 1,580,000 CCO Holdings LLC / CCO Holdings Capital Corp., 5.75%, 2/15/26 (144A) 1,568,150 1,280,000 CSC Holdings LLC, 5.375%, 2/1/28 (144A) 1,196,800 575,000 CSC Holdings LLC, 5.5%, 4/15/27 (144A) 551,885 595,000 Videotron, Ltd., 5.125%, 4/15/27 (144A) 583,100 1,800,000 Videotron, Ltd., 5.375%, 6/15/24 (144A) 1,849,500 EUR 2,300,000 Ziggo Secured Finance BV, 4.25%, 1/15/27 (144A) 2,832,799 ---------------- $ 10,682,477 -------------------------------------------------------------------------------------------------------------- Movies & Entertainment -- 0.9% GBP 900,000 AMC Entertainment Holdings, Inc., 6.375%, 11/15/24 $ 1,256,945 979,000 Netflix, Inc., 4.375%, 11/15/26 915,062 The accompanying notes are an integral part of these financial statements. Pioneer Global High Yield Fund | Semiannual Report | 4/30/18 29 Schedule of Investments | 4/30/18 (unaudited) (continued) -------------------------------------------------------------------------------------------------------------- Principal Amount USD ($) Value -------------------------------------------------------------------------------------------------------------- Movies & Entertainment (continued) 807,000 VOC Escrow, Ltd., 5.0%, 2/15/28 (144A) $ 780,772 EUR 1,125,000 WMG Acquisition Corp., 4.125%, 11/1/24 (144A) 1,426,932 ---------------- $ 4,379,711 ---------------- Total Media $ 16,168,907 -------------------------------------------------------------------------------------------------------------- PHARMACEUTICALS, BIOTECHNOLOGY & LIFE SCIENCES -- 2.3% Biotechnology -- 0.1% 713,000 Charles River Laboratories International, Inc., 5.5%, 4/1/26 (144A) $ 725,264 -------------------------------------------------------------------------------------------------------------- Pharmaceuticals -- 2.2% 2,271,000 Endo Finance LLC / Endo Finco, Inc., 5.375%, 1/15/23 (144A) $ 1,643,636 750,000 Horizon Pharma, Inc., 6.625%, 5/1/23 750,000 225,000 Horizon Pharma, Inc. / Horizon Pharma USA, Inc., 8.75%, 11/1/24 (144A) 239,625 EUR 3,475,000 Valeant Pharmaceuticals International, Inc., 4.5%, 5/15/23 3,814,059 EUR 1,540,000 Valeant Pharmaceuticals International, Inc., 4.5%, 5/15/23 (144A) 1,690,259 2,062,000 Valeant Pharmaceuticals International, Inc., 5.875%, 5/15/23 (144A) 1,894,462 565,000 Valeant Pharmaceuticals International, Inc., 6.5%, 3/15/22 (144A) 586,188 755,000 Valeant Pharmaceuticals International, Inc., 7.0%, 3/15/24 (144A) 796,525 ---------------- $ 11,414,754 ---------------- Total Pharmaceuticals, Biotechnology & Life Sciences $ 12,140,018 -------------------------------------------------------------------------------------------------------------- REAL ESTATE -- 1.3% Specialized REIT -- 1.3% EUR 1,140,000 Equinix, Inc., 2.875%, 2/1/26 $ 1,327,874 919,000 Equinix, Inc., 5.375%, 4/1/23 944,272 2,000,000 Iron Mountain, Inc., 4.875%, 9/15/27 (144A) 1,882,500 2,870,000 Uniti Group LP / Uniti Group Finance, Inc. / CSL Capital LLC, 6.0%, 4/15/23 (144A) 2,805,425 ---------------- Total Real Estate $ 6,960,071 -------------------------------------------------------------------------------------------------------------- RETAILING -- 0.9% Department Stores -- 0.5% 1,800,000 Grupo Kaltex SA de CV, 8.875%, 4/11/22 (144A) $ 1,566,000 EUR 1,025,000 Takko Lux 2 SCA, 5.375%, 11/15/23 (144A) 1,180,474 ---------------- $ 2,746,474 -------------------------------------------------------------------------------------------------------------- Specialty Stores -- 0.4% 1,400,000 PetSmart, Inc., 5.875%, 6/1/25 (144A) $ 1,004,500 1,615,000 PetSmart, Inc., 7.125%, 3/15/23 (144A) 936,700 ---------------- $ 1,941,200 ---------------- Total Retailing $ 4,687,674 -------------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 30 Pioneer Global High Yield Fund | Semiannual Report | 4/30/18 -------------------------------------------------------------------------------------------------------------- Principal Amount USD ($) Value -------------------------------------------------------------------------------------------------------------- SOFTWARE & SERVICES -- 2.3% Data Processing & Outsourced Services -- 1.7% EUR 1,250,000 Alliance Data Systems Corp., 4.5%, 3/15/22 (144A) $ 1,556,178 1,765,000 Alliance Data Systems Corp., 5.875%, 11/1/21 (144A) 1,795,887 3,100,000 Cardtronics, Inc., 5.125%, 8/1/22 3,007,000 1,460,000 Cardtronics, Inc. / Cardtronics USA, Inc., 5.5%, 5/1/25 (144A) 1,354,150 1,260,000 First Data Corp., 7.0%, 12/1/23 (144A) 1,318,439 ---------------- $ 9,031,654 -------------------------------------------------------------------------------------------------------------- Internet Software & Services -- 0.3% 1,780,000 Cimpress NV, 7.0%, 4/1/22 (144A) $ 1,846,750 -------------------------------------------------------------------------------------------------------------- IT Consulting & Other Services -- 0.3% 1,455,000 Rackspace Hosting, Inc., 8.625%, 11/15/24 (144A) $ 1,475,006 ---------------- Total Software & Services $ 12,353,410 -------------------------------------------------------------------------------------------------------------- TECHNOLOGY HARDWARE & EQUIPMENT -- 1.6% Communications Equipment -- 0.1% 512,000 CommScope Technologies LLC, 6.0%, 6/15/25 (144A) $ 526,080 -------------------------------------------------------------------------------------------------------------- Electronic Components -- 1.1% EUR 1,505,000 Belden, Inc., 2.875%, 9/15/25 (144A) $ 1,779,467 EUR 815,000 Belden, Inc., 3.375%, 7/15/27 (144A) 955,166 EUR 2,250,000 Belden, Inc., 3.875%, 3/15/28 2,648,475 EUR 250,000 Belden, Inc., 4.125%, 10/15/26 (144A) 317,171 ---------------- $ 5,700,279 -------------------------------------------------------------------------------------------------------------- Technology Hardware, Storage & Peripherals -- 0.4% 1,910,000 Diebold Nixdorf, Inc., 8.5%, 4/15/24 $ 1,981,625 450,000 TTM Technologies, Inc., 5.625%, 10/1/25 (144A) 441,000 ---------------- $ 2,422,625 ---------------- Total Technology Hardware & Equipment $ 8,648,984 -------------------------------------------------------------------------------------------------------------- TELECOMMUNICATION SERVICES -- 5.9% Integrated Telecommunication Services -- 1.4% 5,075,000 Frontier Communications Corp., 8.75%, 4/15/22 $ 4,224,937 2,100,000 Windstream Services LLC / Windstream Finance Corp., 8.625%, 10/31/25 (144A) 1,926,750 1,889,000 Windstream Services LLC / Windstream Finance Corp., 8.75%, 12/15/24 (144A) 1,128,678 ---------------- $ 7,280,365 -------------------------------------------------------------------------------------------------------------- Wireless Telecommunication Services -- 4.5% 600,000 Altice Finco SA, 8.125%, 1/15/24 (144A) $ 615,750 1,767,000 CenturyLink, Inc., 5.625%, 4/1/25 1,625,640 3,320,000 Digicel, Ltd., 6.0%, 4/15/21 (144A) 3,158,150 775,000 Frontier Communications Corp., 11.0%, 9/15/25 594,812 4,325,000 MTN Mauritius Investment, Ltd., 5.373%, 2/13/22 (144A) 4,379,062 4,235,000 Sprint Corp., 7.25%, 9/15/21 4,494,394 The accompanying notes are an integral part of these financial statements. Pioneer Global High Yield Fund | Semiannual Report | 4/30/18 31 Schedule of Investments | 4/30/18 (unaudited) (continued) -------------------------------------------------------------------------------------------------------------- Principal Amount USD ($) Value -------------------------------------------------------------------------------------------------------------- Wireless Telecommunication Services (continued) 525,000 T-Mobile USA, Inc., 4.75%, 2/1/28 $ 505,208 1,155,000 T-Mobile USA, Inc., 6.0%, 4/15/24 1,209,863 2,750,000 Unison Ground Lease Funding LLC, 5.78%, 3/15/20 (144A) 2,728,903 EUR 1,455,000 Wind Tre S.p.A., 2.625%, 1/20/23 (144A) 1,597,563 EUR 1,972,000 Wind Tre S.p.A., 3.125%, 1/20/25 (144A) 2,097,441 980,000 Wind Tre S.p.A., 5.0%, 1/20/26 (144A) 822,612 ---------------- $ 23,829,398 ---------------- Total Telecommunication Services $ 31,109,763 -------------------------------------------------------------------------------------------------------------- TRANSPORTATION -- 2.1% Airlines -- 0.7% 860,000 DAE Funding LLC, 5.0%, 8/1/24 (144A) $ 828,868 909,573 Guanay Finance, Ltd., 6.0%, 12/15/20 (144A) 925,490 1,585,000 Latam Finance, Ltd., 6.875%, 4/11/24 (144A) 1,630,807 ---------------- $ 3,385,165 -------------------------------------------------------------------------------------------------------------- Highways & Railtracks -- 1.0% 2,645,000 Hidrovias International Finance S.a.r.l., 5.95%, 1/24/25 (144A) $ 2,578,875 MXN 27,000,000 Red de Carreteras de Occidente SAPIB de CV, 9.0%, 6/10/28 (144A) 1,375,901 1,320,000 Rumo Luxembourg S.a.r.l., 7.375%, 2/9/24 (144A) 1,401,180 ---------------- $ 5,355,956 -------------------------------------------------------------------------------------------------------------- Marine -- 0.4% 2,225,000 Navios South American Logistics, Inc. / Navios Logistics Finance US, Inc., 7.25%, 5/1/22 (144A) $ 2,136,000 -------------------------------------------------------------------------------------------------------------- Trucking -- 0.0%+ 2,925,683(h) Inversiones Alsacia SA, 8.0%, 12/31/18 (144A) $ 80,456 ---------------- Total Transportation $ 10,957,577 -------------------------------------------------------------------------------------------------------------- UTILITIES -- 4.4% Electric Utilities -- 2.2% 1,150,000 Cemig Geracao e Transmissao SA, 9.25%, 12/5/24 (144A) $ 1,246,312 EUR 1,225,000 ContourGlobal Power Holdings SA, 5.125%, 6/15/21 (144A) 1,524,320 1,325,000(b)(c) Electricite de France SA, 5.25% (10 Year USD Swap Rate + 371 bps) (144A) 1,328,525 1,120,000 Genneia SA, 8.75%, 1/20/22 (144A) 1,202,600 3,250,000 Light Servicos de Eletricidade SA / Light Energia SA, 7.25%, 5/3/23 (144A) 3,274,375 390,000 NextEra Energy Operating Partners LP, 4.25%, 9/15/24 (144A) 376,350 1,130,000 Stoneway Capital Corp., 10.0%, 3/1/27 (144A) 1,203,778 940,000 TerraForm Power Operating LLC, 4.25%, 1/31/23 (144A) 897,700 940,000 TerraForm Power Operating LLC, 5.0%, 1/31/28 (144A) 874,200 ---------------- $ 11,928,160 -------------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 32 Pioneer Global High Yield Fund | Semiannual Report | 4/30/18 -------------------------------------------------------------------------------------------------------------- Principal Amount USD ($) Value -------------------------------------------------------------------------------------------------------------- Gas Utilities -- 0.9% 2,133,000 DCP Midstream Operating LP, 5.6%, 4/1/44 $ 2,090,340 700,000 Ferrellgas LP / Ferrellgas Finance Corp., 6.5%, 5/1/21 670,250 2,175,000 Ferrellgas LP / Ferrellgas Finance Corp., 6.75%, 6/15/23 1,965,656 ---------------- $ 4,726,246 -------------------------------------------------------------------------------------------------------------- Independent Power Producers & Energy Traders -- 1.3% 1,195,000 Calpine Corp., 5.25%, 6/1/26 (144A) $ 1,143,466 2,529,000 Calpine Corp., 5.75%, 1/15/25 2,320,610 940,000 Instituto Costarricense de Electricidad, 6.95%, 11/10/21 (144A) 999,690 1,105,000 NRG Energy, Inc., 6.625%, 1/15/27 1,136,769 1,113,000 Vistra Energy Corp., 8.0%, 1/15/25 (144A) 1,206,215 ---------------- $ 6,806,750 ---------------- Total Utilities $ 23,461,156 -------------------------------------------------------------------------------------------------------------- TOTAL CORPORATE BONDS (Cost $439,706,841) $ 431,898,527 -------------------------------------------------------------------------------------------------------------- U.S. GOVERNMENT AND AGENCY OBLIGATIONS -- 1.0% of Net Assets 2,600,000(f) U.S. Treasury Bills, 5/10/18 $ 2,599,002 2,800,000(f) U.S. Treasury Bills, 5/17/18 2,798,015 ---------------- $ 5,397,017 -------------------------------------------------------------------------------------------------------------- TOTAL U.S. GOVERNMENT AND AGENCY OBLIGATIONS (Cost $5,396,919) $ 5,397,017 -------------------------------------------------------------------------------------------------------------- FOREIGN GOVERNMENT BONDS -- 6.2% of Net Assets Argentina -- 2.1% 1,125,000 Argentine Republic Government International Bond, 6.875%, 1/26/27 $ 1,120,511 1,850,000 Argentine Republic Government International Bond, 7.5%, 4/22/26 1,938,800 2,650,000 Autonomous City of Buenos Aires Argentina, 7.5%, 6/1/27 (144A) 2,736,655 668,536 Province of Salta Argentina, 9.5%, 3/16/22 (144A) 690,264 1,840,000 Provincia de Entre Rios Argentina, 8.75%, 2/8/25 (144A) 1,846,440 3,015,000 Provincia del Chubut Argentina, 7.75%, 7/26/26 (144A) 2,819,025 ---------------- $ 11,151,695 -------------------------------------------------------------------------------------------------------------- Bahamas -- 0.2% 760,000 Bahamas Government International Bond, 6.0%, 11/21/28 (144A) $ 786,600 -------------------------------------------------------------------------------------------------------------- Bahrain -- 0.4% 2,200,000 Bahrain Government International Bond, 7.0%, 10/12/28 (144A) $ 2,097,621 -------------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Global High Yield Fund | Semiannual Report | 4/30/18 33 Schedule of Investments | 4/30/18 (unaudited) (continued) -------------------------------------------------------------------------------------------------------------- Principal Amount USD ($) Value -------------------------------------------------------------------------------------------------------------- Cote D'Ivoire -- 0.5% EUR 725,000 Ivory Coast Government International Bond, 5.125%, 6/15/25 (144A) $ 925,210 EUR 1,400,000 Ivory Coast Government International Bond, 5.25%, 3/22/30 (144A) 1,712,922 ---------------- $ 2,638,132 -------------------------------------------------------------------------------------------------------------- Dominican Republic -- 0.2% DOP 57,750,000 Dominican Republic International Bond, 8.9%, 2/15/23 (144A) $ 1,204,265 -------------------------------------------------------------------------------------------------------------- Ecuador -- 0.1% 560,000 Ecuador Government International Bond, 10.5%, 3/24/20 (144A) $ 576,800 -------------------------------------------------------------------------------------------------------------- Egypt -- 0.3% EGP 20,550,000(f) Egypt Treasury Bills, 5/15/18 $ 1,158,056 EGP 5,175,000(f) Egypt Treasury Bills, 9/11/18 275,989 ---------------- $ 1,434,045 -------------------------------------------------------------------------------------------------------------- Gabon -- 0.1% 690,000 Gabon Government International Bond, 6.375%, 12/12/24 (144A) $ 672,468 -------------------------------------------------------------------------------------------------------------- Kenya -- 0.5% 1,535,000 Kenya Government International Bond, 5.875%, 6/24/19 (144A) $ 1,558,148 1,150,000 Kenya Government International Bond, 7.25%, 2/28/28 (144A) 1,187,002 ---------------- $ 2,745,150 -------------------------------------------------------------------------------------------------------------- Nigeria -- 0.3% 1,845,000 Africa Finance Corp., 4.375%, 4/29/20 (144A) $ 1,843,838 -------------------------------------------------------------------------------------------------------------- Oman -- 0.5% 1,760,000 Oman Government International Bond, 5.375%, 3/8/27 (144A) $ 1,676,090 747,000 Oman Government International Bond, 5.625%, 1/17/28 (144A) 713,364 ---------------- $ 2,389,454 -------------------------------------------------------------------------------------------------------------- South Korea -- 0.1% INR 30,600,000 Export-Import Bank of Korea, 6.9%, 2/7/23 $ 452,436 -------------------------------------------------------------------------------------------------------------- Sri Lanka -- 0.5% 1,175,000 Sri Lanka Government International Bond, 5.75%, 4/18/23 (144A) $ 1,167,570 1,729,000 Sri Lanka Government International Bond, 6.2%, 5/11/27 (144A) 1,668,177 ---------------- $ 2,835,747 -------------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 34 Pioneer Global High Yield Fund | Semiannual Report | 4/30/18 -------------------------------------------------------------------------------------------------------------- Principal Amount USD ($) Value -------------------------------------------------------------------------------------------------------------- Uruguay -- 0.4% UYU 24,033,000 Uruguay Government International Bond, 8.5%, 3/15/28 (144A) $ 806,163 UYU 37,635,000 Uruguay Government International Bond, 9.875%, 6/20/22 (144A) 1,375,478 ---------------- $ 2,181,641 -------------------------------------------------------------------------------------------------------------- TOTAL FOREIGN GOVERNMENT BONDS (Cost $32,938,603) $ 33,009,892 -------------------------------------------------------------------------------------------------------------- SENIOR SECURED FLOATING RATE LOAN INTERESTS -- 2.9% of Net Assets*(e) AUTOMOBILES & COMPONENTS -- 0.0%+ Auto Parts & Equipment -- 0.0%+ 1,755 Allison Transmission, Inc., New Term Loan, 3.65% (LIBOR + 175 bps), 9/23/22 $ 1,771 ---------------- Total Automobiles & Components $ 1,771 -------------------------------------------------------------------------------------------------------------- CAPITAL GOODS -- 0.2% Aerospace & Defense -- 0.2% 1,289,392 DynCorp International, Inc., Term Loan B2, 7.896% (LIBOR + 600 bps), 7/7/20 $ 1,296,913 ---------------- Total Capital Goods $ 1,296,913 -------------------------------------------------------------------------------------------------------------- COMMERCIAL SERVICES & SUPPLIES -- 0.1% Diversified Support Services -- 0.1% 484,524 IAP Worldwide Services, Inc., Second Lien Term Loan, 8.802% (LIBOR + 650 bps), 7/18/19 $ 477,257 ---------------- Total Commercial Services & Supplies $ 477,257 -------------------------------------------------------------------------------------------------------------- ENERGY -- 0.5% Oil & Gas Drilling -- 0.5% 1,950,000 Gavilan Resources LLC, Second Lien Initial Term Loan, 7.897% (LIBOR + 600 bps), 3/1/24 $ 1,943,906 650,000 Traverse Midstream Partners LLC, Advance Term Loan, 5.85% (LIBOR + 400 bps), 9/27/24 654,368 ---------------- Total Energy $ 2,598,274 -------------------------------------------------------------------------------------------------------------- HEALTH CARE EQUIPMENT & SERVICES -- 0.2% Health Care Services -- 0.2% 869,531 Alliance HealthCare Services, Inc., First Lien Initial Term Loan, 6.401% (LIBOR + 450 bps), 10/24/23 $ 876,415 ---------------- Total Health Care Equipment & Services $ 876,415 -------------------------------------------------------------------------------------------------------------- HOUSEHOLD & PERSONAL PRODUCTS -- 0.4% Personal Products -- 0.4% 2,545,909 Revlon Consumer Products Corp., Initial Term B Loan, 5.401% (LIBOR + 350 bps), 9/7/23 $ 1,997,344 ---------------- Total Household & Personal Products $ 1,997,344 -------------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Global High Yield Fund | Semiannual Report | 4/30/18 35 Schedule of Investments | 4/30/18 (unaudited) (continued) -------------------------------------------------------------------------------------------------------------- Principal Amount USD ($) Value -------------------------------------------------------------------------------------------------------------- MATERIALS -- 0.7% Paper Packaging -- 0.3% 1,598,850 Caraustar Industries, Inc., Refinancing Term Loan, 7.802% (LIBOR + 550 bps), 3/14/22 $ 1,604,846 -------------------------------------------------------------------------------------------------------------- Steel -- 0.4% 1,965,125 Zekelman Industries, Inc. (fka JMC Steel Group, Inc.), Term Loan, 4.999% (LIBOR + 275 bps), 6/14/21 $ 1,977,816 ---------------- Total Materials $ 3,582,662 -------------------------------------------------------------------------------------------------------------- RETAILING -- 0.7% Automotive Retail -- 0.3% 1,384,806 CWGS Group LLC, Term Loan, 4.641% (LIBOR + 275/300 bps), 11/23/23 $ 1,394,326 -------------------------------------------------------------------------------------------------------------- Department Stores -- 0.2% 1,492,208 Neiman Marcus Group, Ltd., LLC, Other Term Loan, 5.141% (LIBOR + 325 bps), 10/25/20 $ 1,316,341 -------------------------------------------------------------------------------------------------------------- Specialty Stores -- 0.2% 997,500 Staples, Inc., Closing Date Term Loan, 5.787% (LIBOR + 400 bps), 9/12/24 $ 988,994 ---------------- Total Retailing $ 3,699,661 -------------------------------------------------------------------------------------------------------------- UTILITIES -- 0.1% Electric Utilities -- 0.1% 125,000 Vistra Operations Co., LLC (fka Tex Operations Co., LLC), Initial Term C Loan, 4.401% (LIBOR + 250 bps), 8/4/23 $ 126,016 703,594 Vistra Operations Co., LLC (fka Tex Operations Co., LLC), Initial Term Loan, 4.401% (LIBOR + 250 bps), 8/4/23 709,310 ---------------- Total Utilities $ 835,326 -------------------------------------------------------------------------------------------------------------- TOTAL SENIOR SECURED FLOATING RATE LOAN INTERESTS (Cost $15,643,090) $ 15,365,623 -------------------------------------------------------------------------------------------------------------- -------------------------------------------------------------------------------------------------------------- Shares -------------------------------------------------------------------------------------------------------------- RIGHTS/WARRANTS -- 0.0%+ of Net Assets ENERGY -- 0.0%+ Coal & Consumable Fuels -- 0.0%+ 61(d)(k) Contura Energy, Inc. $ 1,607 -------------------------------------------------------------------------------------------------------------- Oil & Gas Exploration & Production -- 0.0%+ 7,597^(d)(l) Midstates Petroleum Co., Inc. $ -- ---------------- Total Energy $ 1,607 -------------------------------------------------------------------------------------------------------------- MATERIALS -- 0.0%+ Steel -- 0.0%+ 318,254(d)(m) ANR, Inc. $ 4,297 ---------------- Total Materials $ 4,297 -------------------------------------------------------------------------------------------------------------- TOTAL RIGHTS/WARRANTS (Cost $36,833) $ 5,904 -------------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 36 Pioneer Global High Yield Fund | Semiannual Report | 4/30/18 -------------------------------------------------------------------------------------------------------------- Principal Amount USD ($) Value -------------------------------------------------------------------------------------------------------------- TEMPORARY CASH INVESTMENTS -- 0.7% of Net Assets REPURCHASE AGREEMENTS -- 0.7% 1,320,000 $1,320,000 ScotiaBank, 1.73%, dated 4/30/18 plus accrued interest on 5/1/18 collateralized by the following: $1,344,188 Federal National Mortgage Association, 4.0%, 7/1/26 $2,277 Government National Mortgage Association, 4.0%, 12/20/45. $ 1,320,000 1,320,000 $1,320,000 TD Securities USA LLC, 1.73%, dated 4/30/18 plus accrued interest on 5/1/18 collateralized by $1,346,473 U.S. Treasury Notes, 2.0%, 4/30/24. 1,320,000 1,320,000 $1,320,000 TD Securities USA LLC, 1.75%, dated 4/30/18 plus accrued interest on 5/1/18 collateralized by $1,346,473 U.S. Treasury Notes, 2.0%, 4/30/24. 1,320,000 ---------------- $ 3,960,000 -------------------------------------------------------------------------------------------------------------- TOTAL TEMPORARY CASH INVESTMENTS (Cost $3,960,000) $ 3,960,000 -------------------------------------------------------------------------------------------------------------- -------------------------------------------------------------------------------------------------------------- Number of Strike Expiration Contracts Description Counterparty Notional Price Date -------------------------------------------------------------------------------------------------------------- OVER THE COUNTER (OTC) CALL OPTIONS PURCHASED -- 0.0%+ 297,012^(n) Desarrolladora Bank of Homex New York SAB de CV Mellon Corp. MXN -- --(p) 10/23/22 $ -- 297,012^(o) Desarrolladora Bank of Homex New York SAB de CV Mellon Corp. MXN -- --(p) 10/23/22 -- ---------------- $ -- -------------------------------------------------------------------------------------------------------------- TOTAL OVER THE COUNTER (OTC) CALL OPTIONS PURCHASED (Premiums paid $0) $ -- -------------------------------------------------------------------------------------------------------------- CURRENCY PUT OPTION PURCHASED -- 0.0%+ 9,209,000 Put EUR Call USD Goldman Sachs International EUR 82,982 EUR 1 6/1/18 $ 80,560 -------------------------------------------------------------------------------------------------------------- TOTAL CURRENCY PUT OPTION PURCHASED (Premiums paid $82,982) $ 80,560 -------------------------------------------------------------------------------------------------------------- TOTAL OPTIONS PURCHASED (Premiums paid $82,982) $ 80,560 -------------------------------------------------------------------------------------------------------------- TOTAL INVESTMENTS IN UNAFFILIATED ISSUERS -- 97.5% (Cost $533,692,685) $ 515,861,022 -------------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Global High Yield Fund | Semiannual Report | 4/30/18 37 Schedule of Investments | 4/30/18 (unaudited) (continued) --------------------------------------------------------------------------------------------------------------- Number of Strike Expiration Contracts Description Counterparty Notional Price Date Value --------------------------------------------------------------------------------------------------------------- CURRENCY PUT OPTION WRITTEN -- 0.0%+ (9,209,000) Put EUR Call USD Goldman Sachs International EUR 39,398 EUR 1 6/1/18 $ (24,078) --------------------------------------------------------------------------------------------------------------- TOTAL CURRENCY PUT OPTION WRITTEN (Premiums received $(39,398)) $ (24,078) --------------------------------------------------------------------------------------------------------------- OTHER ASSETS AND LIABILITIES -- 2.5% $ 13,042,000 --------------------------------------------------------------------------------------------------------------- NET ASSETS -- 100.0% $ 528,878,944 =============================================================================================================== BADLARPP Argentine Deposit Rate Badlar Private Banks 30 - 35 Days. bps Basis Point. CMT Constant Maturity Treasury Index. LIBOR London Interbank Offered Rate. 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 April 30, 2018, the value of these securities amounted to $317,920,768, or 60.1% of net assets. (Cat Bond) Catastrophe or event-linked bond. At April 30, 2018, the value of these securities amounted to $4,426,030, or 0.8% of net assets. See Notes to Financial Statements -- Note 1I. + Amount rounds to less than 0.1%. * Senior secured 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, (ii) the prime rate offered by one or more major United States banks, (iii) the rate of a certificate of deposit or (iv) other base lending rates used by commercial lenders. The interest rate shown is the rate accruing at April 30, 2018. + Securities that used significant unobservable inputs to determine their value. ^ Security is valued using fair value methods (other than supplied by independent pricing services). See Notes to Financial Statements -- Note 1A. (a) Debt obligation initially issued at one coupon which converts to a higher coupon at a specific date. The rate shown is the rate at April 30, 2018. (b) The interest rate is subject to change periodically. The interest rate, reference index and spread shown at April 30, 2018. (c) Security is perpetual in nature and has no stated maturity date. (d) Non-income producing security. (e) Floating rate note. Coupon rate, reference index and spread shown at April 30, 2018. (f) Security issued with a zero coupon. Income is recognized through accretion of discount. (g) Payment in Kind (PIK) security which may pay interest in the form of additional principal amount. (h) Security is in default. (i) Structured reinsurance investment. At April 30, 2018, the value of these securities amounted to $13,924,084, or 2.7% of net assets. See Notes to Financial Statements -- Note 1I. The accompanying notes are an integral part of these financial statements. 38 Pioneer Global High Yield Fund | Semiannual Report | 4/30/18 (j) Rate to be determined. (k) Contura Energy, Inc. warrants are exercisable into 61 shares. (l) Midstates Petroleum Co., Inc. warrants are exercisable into 7,415 shares. (m) ANR, Inc. warrants are exercisable into 318,254 shares. (n) Option does not become effective until underlying company's outstanding common shares reach a market capitalization of MXN 12.5 billion. (o) Option does not become effective until underlying company's outstanding common shares reach a market capitalization of MXN 15.0 billion. (p) Strike price is 1 Mexican Peso (MXN). FORWARD FOREIGN CURRENCY CONTRACTS ------------------------------------------------------------------------------------------------------------- In Unrealized Currency Exchange Currency Settlement Appreciation Purchased for Sold Deliver Counterparty Date (Depreciation) ------------------------------------------------------------------------------------------------------------- MXN 8,970,000 USD (481,887) Citibank NA 5/16/18 $ (3,656) NOK 20,938,362 EUR (2,158,674) Goldman Sachs 6/01/18 1,529 International USD 10,129,642 EUR (8,347,593) Goldman Sachs 5/31/18 22,704 International USD 1,338,959 MXN (25,416,124) Goldman Sachs 5/16/18 (16,089) International NOK 20,938,362 EUR (2,167,538) JPMorgan Chase 5/02/18 (5,979) Bank NA USD 5,760,240 INR (385,930,311) JPMorgan Chase 6/29/18 (12,709) Bank NA USD 572,804 MXN (10,839,827) State Street 5/16/18 (5,116) Bank And Trust Co. ------------------------------------------------------------------------------------------------------------- TOTAL FORWARD FOREIGN CURRENCY CONTRACTS $(19,316) ============================================================================================================= SWAP CONTRACTS CENTRALLY CLEARED CREDIT DEFAULT SWAP CONTRACTS -- SELL PROTECTION ------------------------------------------------------------------------------------------------------------ Obligation Annual Notional Reference/ Pay/ Fixed Expiration Premiums Unrealized Market Amount ($)(1) Index Receive(2) Rate Date Paid Appreciation Value ------------------------------------------------------------------------------------------------------------ 4,238,400 Markit CDX Receive 5.00% 12/20/20 $235,043 $ 76,079 $311,122 North America High Yield Index Series 25 3,243,800 Markit CDX Receive 5.00% 6/20/21 226,321 27,412 253,733 North America High Yield Index Series 26 ------------------------------------------------------------------------------------------------------------ $461,364 $103,491 $564,855 ============================================================================================================ The accompanying notes are an integral part of these financial statements. Pioneer Global High Yield Fund | Semiannual Report | 4/30/18 39 Schedule of Investments | 4/30/18 (unaudited) (continued) OVER THE COUNTER (OTC) CREDIT DEFAULT SWAP CONTRACTS -- SELL PROTECTION --------------------------------------------------------------------------------------------------------------------------- Obligation Annual Notional Reference/ Pay/ Fixed Expiration Premiums Unrealized Market Amount ($)(1) Counterparty Index Receive(2) Rate Date (Received) Appreciation Value --------------------------------------------------------------------------------------------------------------------------- 650,000 Goldman Sachs Chesapeake Receive 5.00% 6/20/22 $ (79,625) $ 67,736 $(11,889) International Energy Corp. 415,000 Goldman Sachs Chesapeake Receive 5.00% 6/20/22 (50,837) 43,247 (7,590) International Energy Corp. 690,000 Goldman Sachs Chesapeake Receive 5.00% 6/20/22 (77,625) 65,004 (12,621) International Energy Corp. --------------------------------------------------------------------------------------------------------------------------- $(208,087) $175,987 $(32,100) --------------------------------------------------------------------------------------------------------------------------- TOTAL SWAP CONTRACTS $ 253,277 $279,478 $532,755 =========================================================================================================================== (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. (2) Receives Quarterly. Principal amounts are denominated in U.S. dollars ("USD") unless otherwise noted. ARS Argentine Peso DOP Dominican Republic Peso EGP Egyptian Pound EUR Euro GBP Great British Pound IDR Indonesian Rupiah INR Indian Rupee MXN Mexican Peso NOK Norwegian Krone UYU Uruguayan Peso Purchases and sales of securities (excluding temporary cash investments) for the six months ended April 30, 2018, aggregated $161,029,719 and $222,032,617, 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. (the "Adviser"), serves as the 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 six months ended April 30, 2018, the Fund engaged in purchases and sales pursuant to these procedures amounting to $871,626 and $2,528,872, respectively resulting in a net realized gain of $47,583. At April 30, 2018, the net unrealized depreciation on investments based on cost for federal tax purposes of $536,482,026 was as follows: Aggregate gross unrealized appreciation for all investments in which there is an excess of value over tax cost $ 16,320,635 Aggregate gross unrealized depreciation for all investments in which there is an excess of tax cost over value (36,452,278) ------------ Net unrealized depreciation $(20,131,643) ============ Various inputs are used in determining the value of the Fund's investments. These inputs are summarized in the three broad levels 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 risks, etc.). See Notes to Financial Statements -- Note 1A. The accompanying notes are an integral part of these financial statements. 40 Pioneer Global High Yield Fund | Semiannual Report | 4/30/18 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 April 30, 2018, in valuing the Fund's investments. --------------------------------------------------------------------------------------------- Level 1 Level 2 Level 3 Total --------------------------------------------------------------------------------------------- Convertible Corporate Bonds $ -- $ 9,661,295 $ -- $ 9,661,295 Preferred Stock 2,045,409 -- -- 2,045,409 Convertible Preferred Stocks 5,557,862 -- -- 5,557,862 Common Stocks Capital Goods Industrial Machinery -- -- 1,560 1,560 Energy Oil & Gas Exploration & Production 1,242,434 -- 1,233,057 2,475,491 Materials Forest Products -- 36,759 -- 36,759 All Other Common Stocks 87,954 -- -- 87,954 Asset Backed Security -- 448,790 -- 448,790 Collateralized Mortgage Obligations -- 5,828,379 -- 5,828,379 Corporate Bonds Insurance Reinsurance -- 4,176,205 14,173,909 18,350,114 All Other Corporate Bonds -- 413,548,413 -- 413,548,413 U.S. Government and Agency Obligations -- 5,397,017 -- 5,397,017 Foreign Government Bonds -- 33,009,892 -- 33,009,892 Senior Secured Floating Rate Loan Interests -- 15,365,623 -- 15,365,623 Rights/Warrants Energy Coal & Consumable Fuels 1,607 -- -- 1,607 All Other Rights/Warrants 4,297 -- 4,297 Repurchase Agreements -- 3,960,000 -- 3,960,000 Over The Counter (OTC) Call Options Purchased -- --* -- --* Currency Put Option Purchased -- 80,560 -- 80,560 --------------------------------------------------------------------------------------------- Total Investments in Securities $8,935,266 $491,517,230 $15,408,526 $515,861,022 ============================================================================================= Other Financial Instruments Currency Put Option Written $ -- $ (24,078) $ -- $ (24,078) Net unrealized depreciation on forward foreign currency contracts -- (19,316) -- (19,316) Swap contracts, at value -- 532,755 -- 532,755 --------------------------------------------------------------------------------------------- Total Other Financial Instruments $ -- $ 489,361 $ -- $ 489,361 ============================================================================================= * Security valued at $0. The accompanying notes are an integral part of these financial statements. Pioneer Global High Yield Fund | Semiannual Report | 4/30/18 41 Schedule of Investments | 4/30/18 (unaudited) (continued) The following is a reconciliation of assets valued using significant unobservable inputs (Level 3): ---------------------------------------------------------------------------------------------------------- Common Corporate Stocks Bonds Total ---------------------------------------------------------------------------------------------------------- Balance as of 10/31/17 $ 3,264,403 $ 9,573,017 $12,837,420 Realized gain (loss)(1) (2,598,135) (370,483) (2,968,618) Change in unrealized appreciation (depreciation)(2) 2,823,668 (248,256) 2,575,412 Accrued discounts/premiums -- 1,337 1,337 Purchases -- 9,217,430 9,217,430 Sales (2,255,319) (4,248,991) (6,504,310) Transfers in to Level 3* -- 249,855 249,855 Transfers out of Level 3* -- -- -- ---------------------------------------------------------------------------------------------------------- Balance as of 4/30/18 $ 1,234,617 $14,173,909 $15,408,526 ========================================================================================================== (1) Realized gain (loss) on these securities is included in the realized gain (loss) from investments on the Statement of Operations. (2) Unrealized appreciation (depreciation) on these securities is included in the change in unrealized appreciation (depreciation) from investments on the Statement of Operations. * Transfers are calculated on the beginning of period value. For the six months ended April 30, 2018, securities with an aggregate market value of $249,855 transferred from Level 2 to Level 3 due to the use of unobservable inputs. A security valued at $1,403 transferred from Level 2 to Level 1 due to the use of observable inputs. There were no other transfers between Levels 1, 2 and 3. Net change in unrealized appreciation (depreciation) of Level 3 investments still held and considered Level 3 at April 30, 2018: $ (12,989) --------- The accompanying notes are an integral part of these financial statements. 42 Pioneer Global High Yield Fund | Semiannual Report | 4/30/18 Statement of Assets and Liabilities | 4/30/18 (unaudited) ASSETS: Investments in unaffiliated issuers, at value (cost $533,692,685) $ 515,861,022 Cash 1,002,621 Foreign currencies, at value (cost $4,870,137) 4,894,695 Swap contracts, at value (net premiums paid $253,277) 532,755 Forwards collateral 80,000 Swaps collateral 448,160 Variation margin for centrally cleared swap contracts 475 Receivables -- Investment securities sold 7,187,377 Fund shares sold 789,561 Interest 7,575,907 Other assets 40,935 ------------------------------------------------------------------------------------------- Total assets $ 538,413,508 =========================================================================================== LIABILITIES: Payables -- Investment securities purchased $ 6,206,165 Fund shares repurchased 2,113,631 Distributions 234,935 Trustees' fees 2,036 Due to broker for swap contracts 565,297 Net unrealized depreciation on forward foreign currency contracts 19,316 Written options outstanding (net premiums received $(39,398)) 24,078 Due to affiliates 72,957 Accrued expenses 296,149 ------------------------------------------------------------------------------------------- Total liabilities $ 9,534,564 =========================================================================================== NET ASSETS: Paid-in capital $ 837,516,619 Distributions in excess of net investment income (1,752,460) Accumulated net realized loss on investments (289,331,018) Net unrealized depreciation on investments (17,554,197) ------------------------------------------------------------------------------------------- Net assets $ 528,878,944 =========================================================================================== NET ASSET VALUE PER SHARE: No par value (unlimited number of shares authorized) Class A (based on $162,339,656/18,237,454 shares) $ 8.90 Class C (based on $121,699,618/13,709,124 shares) $ 8.88 Class Y (based on $244,839,670/28,008,085 shares) $ 8.74 MAXIMUM OFFERING PRICE: Class A ($8.90 (divided by) 95.5%) $ 9.32 =========================================================================================== The accompanying notes are an integral part of these financial statements. Pioneer Global High Yield Fund | Semiannual Report | 4/30/18 43 Statement of Operations (unaudited) For the Six Months Ended 4/30/18 INVESTMENT INCOME: Interest from unaffiliated issuers (net of withholding tax of $114,534) $ 18,912,572 Dividends from unaffiliated issuers 237,166 -------------------------------------------------------------------------------------------------------- Total investment income $ 19,149,738 -------------------------------------------------------------------------------------------------------- EXPENSES: Management fees $ 1,999,630 Administrative expense 99,721 Transfer agent fees Class A 92,366 Class C 56,036 Class Y 137,000 Distribution fees Class A 214,670 Class C 661,401 Shareowner communications expense 26,986 Custodian fees 40,445 Registration fees 31,912 Professional fees 34,763 Printing expense 6,849 Trustees' fees 11,025 Pricing expense 25,943 Insurance expense 6,385 Miscellaneous 43,724 -------------------------------------------------------------------------------------------------------- Total expenses $ 3,488,856 -------------------------------------------------------------------------------------------------------- Net investment income $ 15,660,882 -------------------------------------------------------------------------------------------------------- REALIZED AND UNREALIZED GAIN (LOSS) ON INVESTMENTS: Net realized gain (loss) on: Investments in unaffiliated issuers $ 2,266,040 Swap contracts 543,717 Forward foreign currency contracts (467,423) Other assets and liabilities denominated in foreign currencies (5,325) $ 2,337,009 -------------------------------------------------------------------------------------------------------- Change in net unrealized appreciation (depreciation) on: Investments in unaffiliated issuers $(16,280,499) Written options 15,320 Swap contracts (377,707) Forward foreign currency contracts (10,443) Other assets and liabilities denominated in foreign currencies (162,572) $(16,815,901) -------------------------------------------------------------------------------------------------------- Net realized and unrealized gain (loss) on investments $(14,478,892) -------------------------------------------------------------------------------------------------------- Net increase in net assets resulting from operations $ 1,181,990 ======================================================================================================== The accompanying notes are an integral part of these financial statements. 44 Pioneer Global High Yield Fund | Semiannual Report | 4/30/18 Statements of Changes in Net Assets ----------------------------------------------------------------------------------------------- Six Months Ended 4/30/18 Year Ended (unaudited) 10/31/17 ----------------------------------------------------------------------------------------------- FROM OPERATIONS: Net investment income (loss) $ 15,660,882 $ 35,787,373 Net realized gain (loss) on investments 2,337,009 (20,834,494) Change in net unrealized appreciation (depreciation) on investments (16,815,901) 46,874,976 ----------------------------------------------------------------------------------------------- Net increase in net assets resulting from operations $ 1,181,990 $ 61,827,855 ----------------------------------------------------------------------------------------------- DISTRIBUTIONS TO SHAREOWNERS: Net investment income: Class A ($0.23 and $0.42 per share, respectively) $ (4,345,475) $ (8,958,026) Class C ($0.19 and $0.35 per share, respectively) (2,867,496) (6,590,456) Class Y ($0.23 and $0.43 per share, respectively) (7,263,238) (14,231,124) Tax return of capital: Class A ($0.00 and $0.05 per share, respectively) -- (949,283) Class C ($0.00 and $0.05 per share, respectively) -- (808,452) Class Y ($0.00 and $0.05 per share, respectively) -- (1,479,883) ----------------------------------------------------------------------------------------------- Total distributions to shareowners $ (14,476,209) $ (33,017,224) ----------------------------------------------------------------------------------------------- FROM FUND SHARE TRANSACTIONS: Net proceeds from sales of shares $ 46,812,044 $ 127,533,450 Reinvestment of distributions 12,583,975 28,716,717 Cost of shares repurchased (136,373,852) (231,073,307) ----------------------------------------------------------------------------------------------- Net decrease in net assets resulting from Fund share transactions $ (76,977,833) $ (74,823,140) ----------------------------------------------------------------------------------------------- Net decrease in net assets $ (90,272,052) $ (46,012,509) NET ASSETS: Beginning of period $ 619,150,996 $ 665,163,505 ----------------------------------------------------------------------------------------------- End of period $ 528,878,944 $ 619,150,996 ----------------------------------------------------------------------------------------------- Distributions in excess of net investment income $ (1,752,460) $ (2,937,133) =============================================================================================== The accompanying notes are an integral part of these financial statements. Pioneer Global High Yield Fund | Semiannual Report | 4/30/18 45 Statements of Changes in Net Assets (continued) ----------------------------------------------------------------------------------------------------- Six Months Six Months Ended Ended 4/30/18 4/30/18 Year Ended Year Ended Shares Amount 10/31/17 10/31/17 (unaudited) (unaudited) Shares Amount ----------------------------------------------------------------------------------------------------- Class A Shares sold 800,108 $ 7,248,595 2,627,008 $ 23,469,846 Reinvestment of distributions 408,195 3,688,246 977,107 8,698,460 Less shares repurchased (3,035,268) (27,435,943) (6,668,959) (59,151,186) ----------------------------------------------------------------------------------------------------- Net decrease (1,826,965) $(16,499,102) (3,064,844) $ (26,982,880) ===================================================================================================== Class C Shares sold 175,006 $ 1,582,573 572,332 $ 5,052,440 Reinvestment of distributions 286,976 2,585,687 709,708 6,301,947 Less shares repurchased (2,547,596) (22,977,769) (6,615,650) (58,590,146) ----------------------------------------------------------------------------------------------------- Net decrease (2,085,614) $(18,809,509) (5,333,610) $ (47,235,759) ===================================================================================================== Class Y Shares sold 4,258,497 $ 37,980,876 11,357,798 $ 99,011,164 Reinvestment of distributions 711,004 6,310,042 1,567,203 13,716,310 Less shares repurchased (9,660,935) (85,960,140) (13,003,798) (113,331,975) ----------------------------------------------------------------------------------------------------- Net decrease (4,691,434) $(41,669,222) (78,797) $ (604,501) ===================================================================================================== The accompanying notes are an integral part of these financial statements. 46 Pioneer Global High Yield Fund | Semiannual Report | 4/30/18 Financial Highlights ------------------------------------------------------------------------------------------------------------------------------------ Six Months Year Ended Year Year Year Year Ended 4/30/18 Ended Ended Ended Ended 10/31/13 (unaudited) 10/31/17 10/31/16* 10/31/15* 10/31/14* (Consolidated) ------------------------------------------------------------------------------------------------------------------------------------ Class A Net asset value, beginning of period $ 9.12 $ 8.71 $ 8.64 $ 9.79 $ 10.13 $ 10.13 ------------------------------------------------------------------------------------------------------------------------------------ Increase (decrease) from investment operations: Net investment income (loss) $ 0.25(a) $ 0.51(a) $ 0.54(a) $ 0.58(a) $ 0.66 $ 0.71 Net realized and unrealized gain (loss) on investments (0.24) 0.37 0.04(b) (1.19) (0.34) (0.02) ------------------------------------------------------------------------------------------------------------------------------------ Net increase (decrease) from investment operations $ 0.01 $ 0.88 $ 0.58 $ (0.61) $ 0.32 $ 0.69 ------------------------------------------------------------------------------------------------------------------------------------ Distributions to shareowners: Net investment income $ (0.23) $ (0.42) $ (0.47) $ (0.46) $ (0.63) $ (0.69) Tax return of capital -- (0.05) (0.04) (0.08) (0.03) -- ------------------------------------------------------------------------------------------------------------------------------------ Total distributions $ (0.23) $ (0.47) $ (0.51) $ (0.54) $ (0.66) $ (0.69) ------------------------------------------------------------------------------------------------------------------------------------ Net increase (decrease) in net asset value $ (0.22) $ 0.41 $ 0.07 $ (1.15) $ (0.34) $ -- ------------------------------------------------------------------------------------------------------------------------------------ Net asset value, end of period $ 8.90 $ 9.12 $ 8.71 $ 8.64 $ 9.79 $ 10.13 ==================================================================================================================================== Total return (c) 0.07%(d) 10.33% 7.14%(e) (6.36)% 3.16% 6.96% Ratio of net expenses to average net assets 1.17%(f) 1.18% 1.19% 1.17% 1.13% 1.10% Ratio of net investment income (loss) to average net assets 5.47%(f) 5.71% 6.50% 6.31% 6.62% 6.97% Portfolio turnover rate 29%(d) 53% 40% 32% 32% 33% Net assets, end of period (in thousands) $162,340 $182,900 $201,360 $254,056 $373,543 $531,829 ==================================================================================================================================== * The Fund was audited by an 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) The amount shown for a share outstanding does not correspond with the aggregate loss on investments for the period due to the timing of sales and repurchases of shares in relation to fluctuating market values of the investments of the Fund. (c) 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 and no sales charges. Total return would be reduced if sales charges were taken into account. (d) Not annualized. (e) If the Fund had not recognized gains in the settlement of class action lawsuits during the year ended October 31, 2016, the total return would have been 7.01%. (f) Annualized. The accompanying notes are an integral part of these financial statements. Pioneer Global High Yield Fund | Semiannual Report | 4/30/18 47 Financial Highlights (continued) ------------------------------------------------------------------------------------------------------------------------------------ Six Months Year Ended Year Year Year Year Ended 4/30/18 Ended Ended Ended Ended 10/31/13 (unaudited) 10/31/17 10/31/16* 10/31/15* 10/31/14* (Consolidated) ------------------------------------------------------------------------------------------------------------------------------------ Class C Net asset value, beginning of period $ 9.09 $ 8.69 $ 8.62 $ 9.76 $ 10.10 $ 10.10 ------------------------------------------------------------------------------------------------------------------------------------ Increase (decrease) from investment operations: Net investment income (loss) $ 0.21(a) $ 0.44(a) $ 0.48(a) $ 0.51(a) $ 0.59 $ 0.63 Net realized and unrealized gain (loss) on investments (0.23) 0.36 0.04(b) (1.17) (0.34) (0.01) ------------------------------------------------------------------------------------------------------------------------------------ Net increase (decrease) from investment operations $ (0.02) $ 0.80 $ 0.52 $ (0.66) $ 0.25 $ 0.62 ------------------------------------------------------------------------------------------------------------------------------------ Distributions to shareowners: Net investment income $ (0.19) $ (0.35) $ (0.41) $ (0.40) $ (0.56) $ (0.62) Tax return of capital -- (0.05) (0.04) (0.08) (0.03) -- ------------------------------------------------------------------------------------------------------------------------------------ Total distributions $ (0.19) $ (0.40) $ (0.45) $ (0.48) $ (0.59) $ (0.62) ------------------------------------------------------------------------------------------------------------------------------------ Net increase (decrease) in net asset value $ (0.21) $ 0.40 $ 0.07 $ (1.14) $ (0.34) $ -- ------------------------------------------------------------------------------------------------------------------------------------ Net asset value, end of period $ 8.88 $ 9.09 $ 8.69 $ 8.62 $ 9.76 $ 10.10 ==================================================================================================================================== Total return (c) (0.19)%(d) 9.46% 6.40%(e) (6.96)% 2.43% 6.23% Ratio of net expenses to average net assets 1.89%(f) 1.89% 1.90% 1.87% 1.83% 1.81% Ratio of net investment income (loss) to average net assets 4.75%(f) 5.01% 5.79% 5.61% 5.91% 6.26% Portfolio turnover rate 29%(d) 53% 40% 32% 32% 33% Net assets, end of period (in thousands) $121,700 $143,587 $183,542 $237,163 $354,162 $420,932 ==================================================================================================================================== * The Fund was audited by an 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) The amount shown for a share outstanding does not correspond with the aggregate loss on investments for the period due to the timing of sales and repurchases of shares in relation to fluctuating market values of the investments of the Fund. (c) 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 and no sales charges. Total return would be reduced if sales charges were taken into account. (d) Not annualized. (e) If the Fund had not recognized gains in the settlement of class action lawsuits during the year ended October 31, 2016 the total return would have been 6.28%. (f) Annualized. The accompanying notes are an integral part of these financial statements. 48 Pioneer Global High Yield Fund | Semiannual Report | 4/30/18 ------------------------------------------------------------------------------------------------------------------------------------ Six Months Year Ended Year Year Year Year Ended 4/30/18 Ended Ended Ended Ended 10/31/13 (unaudited) 10/31/17 10/31/16* 10/31/15* 10/31/14* (Consolidated) ------------------------------------------------------------------------------------------------------------------------------------ Class Y Net asset value, beginning of period $ 8.95 $ 8.55 $ 8.49 $ 9.62 $ 9.96 $ 9.96 ------------------------------------------------------------------------------------------------------------------------------------ Increase (decrease) from investment operations: Net investment income (loss) $ 0.25(a) $ 0.52(a) $ 0.57(a) $ 0.60(a) $ 0.67 $ 0.72 Net realized and unrealized gain (loss) on investments (0.23) 0.36 0.01(b) (1.17) (0.33) (0.01) ------------------------------------------------------------------------------------------------------------------------------------ Net increase (decrease) from investment operations $ 0.02 $ 0.88 $ 0.58 $ (0.57) $ 0.34 $ 0.71 ------------------------------------------------------------------------------------------------------------------------------------ Distributions to shareowners: Net investment income $ (0.23) $ (0.43) $ (0.48) $ (0.48) $ (0.65) $ (0.71) Tax return of capital -- (0.05) (0.04) (0.08) (0.03) -- ------------------------------------------------------------------------------------------------------------------------------------ Total distributions $ (0.23) $ (0.48) $ (0.52) $ (0.56) $ (0.68) $ (0.71) ------------------------------------------------------------------------------------------------------------------------------------ Net increase (decrease) in net asset value $ (0.21) $ 0.40 $ 0.06 $ (1.13) $ (0.34) $ -- ------------------------------------------------------------------------------------------------------------------------------------ Net asset value, end of period $ 8.74 $ 8.95 $ 8.55 $ 8.49 $ 9.62 $ 9.96 ==================================================================================================================================== Total return (c) 0.27%(d) 10.60% 7.34% (6.08)% 3.40% 7.27% Ratio of net expenses to average net assets 0.90%(e) 0.91% 0.90% 0.87% 0.84% 0.82% Ratio of net investment income (loss) to average net assets 5.73%(e) 5.96% 6.93% 6.60% 6.88% 7.24% Portfolio turnover rate 29%(d) 53% 40% 32% 32% 33% Net assets, end of period (in thousands) $244,840 $292,664 $280,262 $485,344 $682,911 $780,656 ==================================================================================================================================== * The Fund was audited by an 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) The amount shown for a share outstanding does not correspond with the aggregate loss on investments for the period due to the timing of sales and repurchases of shares in relation to fluctuating market values of the investments of the Fund. (c) 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. (d) Not annualized. (e) Annualized. The accompanying notes are an integral part of these financial statements. Pioneer Global High Yield Fund | Semiannual Report | 4/30/18 49 Notes to Financial Statements | 4/30/18 (unaudited) 1. Organization and Significant Accounting Policies Pioneer Global High Yield Fund (the "Fund") is one of two portfolios comprising Pioneer Series Trust VII (the "Trust"), 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 maximize total return through a combination of income and capital appreciation. The Fund offers five classes of shares designated as Class A, Class C, Class K, Class T and Class Y shares. Class Z shares converted to Class Y shares as of the close of business on August 7, 2015. Class K shares and Class T shares had not commenced operations as of April 30, 2018. 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"). 50 Pioneer Global High Yield Fund | Semiannual Report | 4/30/18 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. 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. 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. 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 Pioneer Global High Yield Fund | Semiannual Report | 4/30/18 51 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 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. Event-linked bonds or catastrophe bonds are valued at the bid price obtained from an independent third party pricing service. Other insurance-linked securities (including sidecars, collateralized reinsurance and industry loss warranties) may be valued at the bid price obtained from an independent pricing service, or through a third party using a pricing matrix, insurance industry valuation models, or other fair value methods or techniques to provide an estimated value of the instrument. 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. 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. Forward foreign currency exchange contracts are valued daily using the foreign exchange rate or, for longer term forward contract positions, the spot currency rate and the forward points on a daily basis, in each case provided by a third party pricing service. Contracts whose forward settlement date falls between two quoted days are valued by interpolation. 52 Pioneer Global High Yield Fund | Semiannual Report | 4/30/18 Options contracts are generally valued at the mean between the last bid and ask prices on the principal exchange where they are traded. Over-the-counter ("OTC") options and options on swaps ("swaptions") are valued 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. 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 April 30, 2018, there were six securities that were 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 pricing model) representing 0.4% of net assets. The value of these fair valued securities was $2,038,081. 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. Pioneer Global High Yield Fund | Semiannual Report | 4/30/18 53 Interest income, including interest on income-bearing cash accounts, is recorded on the accrual basis. Dividend and interest income are reported net of unrecoverable foreign taxes withheld at the applicable country rates and net of income accrued on defaulted securities. 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. 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. 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. 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 on the Statement of Operations from the effects of changes in the market prices of those securities, but are included with the net realized and unrealized gain or loss on investments. D. Forward Foreign Currency Contracts The Fund may enter into forward foreign currency contracts ("contracts") for the purchase or sale of a specific foreign currency at a fixed price on a future date. All contracts are marked to market daily at the applicable exchange rates, and any resulting unrealized appreciation or depreciation is recorded in the Fund's financial statements. The Fund records realized gains and losses at the time a contract is offset by entry into a closing transaction or extinguished by delivery of the currency. Risks may arise upon entering into these contracts from the potential inability of counterparties to meet the terms of the contract and from unanticipated movements in the value of foreign currencies relative to the U.S. dollar. (See Note 7) 54 Pioneer Global High Yield Fund | Semiannual Report | 4/30/18 At April 30, 2018, the Fund had entered into various forward foreign currency contracts that obligate the Fund to deliver or take delivery of currencies at specified future maturity dates. Alternatively, prior to the settlement date of a forward foreign currency contract, the Fund may close out such contract by entering into an offsetting contract. The average notional value of forward foreign currency contracts open during the six months ended April 30, 2018 was $32,186,935. Forward foreign currency contracts outstanding at April 30, 2018 are listed in the Schedule of Investments. E. 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 provision for federal income taxes is required. As of October 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 on 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 over distributions 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. The tax character of current year distributions payable will be determined at the end of the current taxable year. The tax character of distributions paid during the year ended October 31, 2017 was as follows: --------------------------------------------------------------------------- 2017 --------------------------------------------------------------------------- Distributions paid from: Ordinary income $29,779,606 Tax return of capital 3,237,618 --------------------------------------------------------------------------- Total $33,017,224 =========================================================================== Pioneer Global High Yield Fund | Semiannual Report | 4/30/18 55 The following shows the components of distributable earnings on a federal income tax basis at October 31, 2017: --------------------------------------------------------------------------- 2017 --------------------------------------------------------------------------- Distributable earnings: Capital loss carryforward $(291,662,274) Current year dividend payable (305,325) Net unrealized depreciation (3,375,857) --------------------------------------------------------------------------- Total $(295,343,456) =========================================================================== The difference between book basis and tax basis unrealized depreciation is attributable to the tax deferral of losses on wash sales, the mark-to-market of foreign currency contracts and swaps, adjustments relating to catastrophe bonds, swaps, interest on defaulted bonds, and interest accruals on preferred stock. F. Fund Shares The Fund records sales and repurchases of its shares as of trade date. The Distributor earned $5,467 in underwriting commissions on the sale of Class A shares during the six months ended April 30, 2018. G. 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. 56 Pioneer Global High Yield Fund | Semiannual Report | 4/30/18 H. 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's investments in foreign markets and countries with limited developing markets may subject the Fund to a greater degree of risk than investments in a developed market. These risks include disruptive political or economic conditions and the imposition of adverse governmental laws or currency exchange restrictions. 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 could adversely affect the price and liquidity of fixed income securities and could also result in increased redemptions from the Fund. 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. With the increased use of technologies such as the Internet to conduct business, the Fund is susceptible to operational, information security and related risks. While the Fund's Adviser has established business continuity plans in the event of, and risk management systems to prevent, limit or mitigate, such cyber-attacks, there are inherent limitations in such plans and systems including the possibility that certain risks have not been identified. Furthermore, the Fund cannot control the cybersecurity plans and systems put in place by service providers to the Fund such as Brown Brothers Harriman & Co., the Fund's custodian and accounting agent, and DST Asset Manager Solutions, Inc., the Fund's transfer agent. In addition, many Pioneer Global High Yield Fund | Semiannual Report | 4/30/18 57 beneficial owners of Fund shares hold them through accounts at broker- dealers, retirement platforms and other financial market participants over which neither the Fund nor Amundi Pioneer exercises control. Each of these may in turn rely on service providers to them, which are also subject to the risk of cyber-attacks. Cybersecurity failures or breaches at Amundi Pioneer or the Fund's service providers or intermediaries have the ability to cause disruptions and impact business operations potentially resulting in financial losses, interference with the Fund's ability to calculate its net asset value, impediments to trading, the inability of Fund shareowners to effect share purchases, redemptions or exchanges or receive distributions, loss of or unauthorized access to private shareowner information and violations of applicable privacy and other laws, regulatory fines, penalties, reputational damage, or additional compliance costs. Such costs and losses may not be covered under any insurance. In addition, maintaining vigilance against cyber-attacks may involve substantial costs over time, and system enhancements may themselves be subject to cyber-attacks. I. Insurance-Linked Securities ("ILS") Event-linked bonds are floating rate debt obligations for which the return of principal and the payment of interest are contingent on the non-occurrence of a pre-defined "trigger" event, such as a hurricane or an earthquake of a specific magnitude. The trigger event's magnitude may be based on losses to a company or industry, industry indexes or readings of scientific instruments, or may be based on specified actual losses. If a trigger event occurs, as defined within the terms of an event-linked bond, the Fund may lose a portion or all of its accrued interest and/or principal invested in such event-linked bond. The Fund is entitled to receive principal and interest payments so long as no trigger event occurs of the description and magnitude specified by the instrument. In addition to the specified trigger events, event-linked bonds may expose the Fund to other risks, including but not limited to issuer (credit) default, adverse regulatory or jurisdictional interpretations and adverse tax consequences. The Fund's investments in ILS may include special purpose vehicles ("SPVs") or similar instruments structured to comprise a portion of a reinsurer's catastrophe-oriented business, known as quota share instruments (sometimes referred to as reinsurance sidecars), or to provide reinsurance relating to specific risks to insurance or reinsurance companies through a collateralized instrument, known as collateralized reinsurance. Structured reinsurance investments also may include industry loss warranties ("ILWs"). A traditional ILW takes the form of a bilateral reinsurance contract, but there are also products that take the form of derivatives, collateralized structures, or exchange-traded instruments. 58 Pioneer Global High Yield Fund | Semiannual Report | 4/30/18 Structured reinsurance investments, including quota share instruments, collateralized reinsurance investments and ILWs, generally are subject to the same risks as event-linked bonds. In addition, where the instruments are based on the performance of underlying reinsurance contracts, the Fund has limited transparency into the individual underlying contracts, and therefore must rely upon the risk assessment and sound underwriting practices of the issuer. Accordingly, it may be more difficult for the Adviser to fully evaluate the underlying risk profile of the Fund's structured reinsurance investments, and therefore the Fund's assets are placed at greater risk of loss than if the Adviser had more complete information. Structured reinsurance instruments generally will be considered illiquid securities by the Fund. These securities may be difficult to purchase, sell or unwind. Illiquid securities also may be difficult to value. If the Fund is forced to sell an illiquid asset, the Fund may be forced to sell at a loss. J. Credit Default Swap Contracts A credit default swap is a contract between a buyer of protection and a seller of protection against a pre-defined credit event on an underlying reference obligation, which may be a single security or a basket or index of securities. The Fund may buy or sell credit default swap contracts to seek to increase the Fund's income, or to attempt to hedge the risk of default on portfolio securities. A credit default swap index is used to hedge risk or take a position on a basket of credit entities or indices. As a seller of protection, the Fund would be required to pay the notional (or other agreed-upon) value of the referenced debt obligation to the counterparty in the event of a default by a U.S. or foreign corporate issuer of a debt obligation, which would likely result in a loss to the Fund. In return, the Fund would receive from the counterparty a periodic stream of payments during the term of the contract, provided that no event of default occurred. The maximum exposure of loss to the seller would be the notional value of the credit default swaps outstanding. If no default occurs, the Fund would keep the stream of payments and would have no payment obligation. The Fund may also buy credit default swap contracts in order to hedge against the risk of default of debt securities, in which case the Fund would function as the counterparty referenced above. As a buyer of protection, the Fund makes an upfront or periodic payment to the protection seller in exchange for the right to receive a contingent payment. An upfront payment made by the Fund, as the protection buyer, is recorded within the "Swap contracts, at value" line item on the Statement of Assets and Liabilities. Periodic payments received or paid by the Fund are recorded as realized gains or losses on the Statement of Operations. Pioneer Global High Yield Fund | Semiannual Report | 4/30/18 59 Credit default swap contracts are marked-to-market daily using valuations supplied by independent sources and the change in value, if any, is recorded within the "Swap contracts, at value" line item on the Statement of Assets and Liabilities. Payments received or made as a result of a credit event or upon termination of the contract are recognized, net of the appropriate amount of the upfront payment, as realized gains or losses on the Statement of Operations. Credit default swap contracts involving the sale of protection may involve greater risks than if the Fund had invested in the referenced debt instrument directly. Credit default swap contracts are subject to general market risk, liquidity risk, counterparty risk and credit risk. If the Fund is a protection buyer and no credit event occurs, it will lose its investment. If the Fund is a protection seller and a credit event occurs, the value of the referenced debt instrument received by the Fund, together with the periodic payments received, may be less than the amount the Fund pays to the protection buyer, resulting in a loss to the Fund. Certain swap contracts that are cleared through a central clearinghouse are referred to as centrally cleared swaps. All payments made or received by the Fund are pursuant to a centrally cleared swap contract with the central clearing party rather than the original counterparty. Upon entering into a centrally cleared swap contract, the Fund is required to make an initial margin deposit, either in cash or in securities. The daily change in value on open centrally cleared contracts is recorded as "Variation margin for centrally cleared swaps" on the Statement of Assets and Liabilities. Cash received from or paid to the broker related to previous margin movement is held in a segregated account at the broker and is recorded as either "Due from broker for swaps" or "Due to broker for swaps" on the Statement of Assets and Liabilities. The amount of cash deposited with a broker as collateral at April 30, 2018, is recorded as "Swaps collateral" on the Statement of Assets and Liabilities. Open credit default swap contracts at April 30, 2018, are listed in the Schedule of Investments. The average notional value of credit default swap contracts open during the six months ended April 30, 2018 was $9,731,498. K. Purchased Options The Fund may purchase put and call options to seek to increase total return. Purchased call and put options entitle the Fund to buy and sell a specified number of shares or units of a particular security, currency or index at a specified price at a specific date or within a specific period of time. Upon the 60 Pioneer Global High Yield Fund | Semiannual Report | 4/30/18 purchase of a call or put option, the premium paid by the Fund is included on the Statement of Assets and Liabilities as an investment. All premiums are marked-to-market daily, and any unrealized appreciation or depreciation are recorded in the Fund's financial statements. As the purchaser of an index option, the Fund has the right to receive a cash payment equal to any depreciation in the value of the index below the strike price of the option (in the case of a put) or equal to any appreciation in the value of the index over the strike price of the option (in the case of a call) as of the valuation date of the option. Premiums paid for purchased call and put options which have expired are treated as realized losses on investments on the Statement of Operations. Upon the exercise or closing of a purchased put option, the premium is offset against the proceeds on the sale of the underlying security or financial instrument in order to determine the realized gain or loss on investments. Upon the exercise or closing of a purchased call option, the premium is added to the cost of the security or financial instrument. The risk associated with purchasing options is limited to the premium originally paid. The average market value of contracts open during the six months ended April 30, 2018 was $18,049. Open purchased options at April 30, 2018 are listed in the Fund's Schedule of Investments. L. Option Writing The Fund may write put and covered call options to seek to increase total return. When an option is written, the Fund receives a premium and becomes obligated to purchase or sell the underlying security at a fixed price, upon the exercise of the option. When the Fund writes an option, an amount equal to the premium received by the Fund is recorded as a "Written options outstanding" on the Statement of Assets and Liabilities and is subsequently adjusted to the current value of the option written. Premiums received from writing options that expire unexercised are treated by the Fund on the expiration date as realized gains from investments. The difference between the premium and the amount paid on effecting a closing purchase transaction, including brokerage commissions, is also treated as a realized gain on the Statement of Operations, or, if the premium is less than the amount paid for the closing purchase transaction, as a realized loss on the Statement of Operations. If a call option is exercised, the premium is added to the proceeds from the sale of the underlying security in determining whether the Fund has realized a gain or loss. The Fund as writer of an option bears the market risk of an unfavorable change in the price of the security underlying the written option. The average market value of contracts open during the six months ended April 30, 2018 was $5,892. Open written options at April 30, 2018 are listed in the Fund's Schedule of Investments. Pioneer Global High Yield Fund | Semiannual Report | 4/30/18 61 2. Management Agreement The Adviser manages the Fund's portfolio. Management fees are calculated daily at the annual rate of 0.70% of the Fund's average daily net assets up to $500 million; 0.65% of the next $500 million; 0.60% of the next $500 million; 0.55% of the next $500 million; and 0.45% on assets over $2 billion. For the six months ended April 30, 2018, the effective management fee (excluding waivers and/or assumption of expenses) was equivalent to 0.69% (annualized) of the Fund's average daily net assets. 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 $50,702 in management fees, administrative costs and certain other reimbursements payable to the Adviser at April 30, 2018. 3. Transfer Agent DST Asset Manager Solutions, 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 shareowner communications activities such as proxy and statement mailings, outgoing phone calls. For the six months ended April 30, 2018, such out-of-pocket expenses by class of shares were as follows: -------------------------------------------------------------------------------- Shareowner Communications -------------------------------------------------------------------------------- Class A $14,028 Class C 6,035 Class Y 6,923 -------------------------------------------------------------------------------- Total $26,986 ================================================================================ 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. 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 62 Pioneer Global High Yield Fund | Semiannual Report | 4/30/18 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 $22,255 in distribution fees payable to the Distributor at April 30, 2018. 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 six months ended April 30, 2018, CDSCs in the amount of $1,173 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 Fund participates in a credit facility that is in the amount of $195 million. Under such credit 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 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 six months ended April 30, 2018, the Fund had no borrowings under the credit facility. Pioneer Global High Yield Fund | Semiannual Report | 4/30/18 63 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 Over the Counter ("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 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 each specific ISDA of each 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 on the Statement of Assets and Liabilities as "Swaps collateral" and/or "Futures collateral". Securities pledged by the Fund as collateral, if any, are identified as such in the Schedule of Investments. 64 Pioneer Global High Yield Fund | Semiannual Report | 4/30/18 Financial instruments subject to an enforceable master netting agreement such as an ISDA Master Agreement have not been offset on the Statement of Assets and Liabilities. The following charts show gross assets and liabilities of the Fund as of April 30, 2018. -------------------------------------------------------------------------------------------------------- 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) -------------------------------------------------------------------------------------------------------- Goldman Sachs International $200,220 $(16,089) $ -- $ -- $184,131 -------------------------------------------------------------------------------------------------------- Total $200,220 $(16,089) $ -- $ -- $184,131 ======================================================================================================== -------------------------------------------------------------------------------------------------------- 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) -------------------------------------------------------------------------------------------------------- Citibank NA $ 3,656 $ -- $ -- $ -- $3,656 Goldman Sachs International 16,089 (16,089) -- -- -- JPMorgan Chase Bank NA 18,688 -- -- (18,688) -- State Street Bank and Trust Co. 5,116 -- -- -- 5,116 -------------------------------------------------------------------------------------------------------- Total $43,549 $(16,089) $ -- $(18,688) $8,772 ======================================================================================================== (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. 7. Additional Disclosures about Derivative Instruments and Hedging Activities The Fund's use of derivatives may enhance or mitigate the Fund's exposure 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 rate 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. Pioneer Global High Yield Fund | Semiannual Report | 4/30/18 65 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 fair value of open derivative instruments (not considered to be hedging instruments for accounting disclosure purposes) by risk exposure at April 30, 2018 was as follows: --------------------------------------------------------------------------------------- Foreign Statement of Interest Credit Exchange Equity Commodity Assets and Liabilities Rate Risk Risk Rate Risk Risk Risk --------------------------------------------------------------------------------------- Assets Swap contracts, at value $ -- $532,755 $ -- $ -- $ -- --------------------------------------------------------------------------------------- Total Value $ -- $532,755 $ -- $ -- $ -- ======================================================================================= Liabilities Net unrealized depreciation on forward foreign currency contracts $ -- $ -- $19,316 $ -- $ -- Written options outstanding -- -- 24,078 -- -- --------------------------------------------------------------------------------------- Total Value $ -- $ -- $43,394 $ -- $ -- ======================================================================================= The effect of derivative instruments (not considered to be hedging instruments for accounting disclosure purposes) on the Statement of Operations by risk exposure at April 30, 2018 was as follows: --------------------------------------------------------------------------------------- Foreign Statement Interest Credit Exchange Equity Commodity of Operations Rate Risk Risk Rate Risk Risk Risk --------------------------------------------------------------------------------------- Net realized gain (loss) on Forward foreign currency contracts $ -- $ -- $(467,423) $ -- $ -- Swap contracts -- 543,717 -- -- -- --------------------------------------------------------------------------------------- Total Value $ -- $ 543,717 $(467,423) $ -- $ -- ======================================================================================= Change in net unrealized appreciation (depreciation) on Written options $ -- $ -- $ 15,320 $ -- $ -- Forward foreign currency contracts -- -- (10,443) -- -- Swap contracts -- (377,707) -- -- -- --------------------------------------------------------------------------------------- Total Value $ -- $(377,707) $ 4,877 $ -- $ -- ======================================================================================= 66 Pioneer Global High Yield Fund | Semiannual Report | 4/30/18 8. 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 obliged 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 on the Statement of Operations. As of April 30, 2018, the Fund had the following unfunded loan commitments outstanding: ---------------------------------------------------------------------------------------- Unrealized Appreciation/ Loan Principal Cost Value (Depreciation) ---------------------------------------------------------------------------------------- Centene Corporation, Bridge Loan $4,490,000 $4,490,000 $4,490,000 $ -- Nationstar Mortgage Holdings Inc., Bridge Loan 1,150,910 1,150,910 1,150,910 -- Nationstar Mortgage Holdings Inc., Tranche A, Bridge Loan 1,534,545 1,534,545 1,534,545 -- Nationstar Mortgage Holdings Inc., Tranche B, Bridge Loan 1,534,545 1,534,545 1,534,545 ---------------------------------------------------------------------------------------- Total $8,710,000 $8,710,000 $8,710,000 $ -- ======================================================================================== Pioneer Global High Yield Fund | Semiannual Report | 4/30/18 67 Additional Information 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, 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 October 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 68 Pioneer Global High Yield Fund | Semiannual Report | 4/30/18 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 adviser 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 Global High Yield Fund | Semiannual Report | 4/30/18 69 Trustees, Officers and Service Providers Trustees Officers Thomas J. Perna, Chairman Lisa M. Jones, President and David R. Bock Chief Executive Officer Benjamin M. Friedman Mark E. Bradley, Treasurer and Margaret B.W. Graham Chief Financial Officer Lisa M. Jones Christopher J. Kelley, Secretary and Lorraine H. Monchak Chief Legal Officer Marguerite A. Piret Fred J. Ricciardi Kenneth J. Taubes Investment Adviser and Administrator Amundi Pioneer Asset Management, Inc. Custodian and Sub-Administrator Brown Brothers Harriman & Co. Principal Underwriter Amundi Pioneer Distributor, Inc. Legal Counsel Morgan, Lewis & Bockius LLP Shareowner Services and Transfer Agent DST Asset Manager Solutions, 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. 70 Pioneer Global High Yield Fund | Semiannual Report | 4/30/18 This page is for your notes. Pioneer Global High Yield Fund | Semiannual Report | 4/30/18 71 This page is for your notes. 72 Pioneer Global High Yield Fund | Semiannual Report | 4/30/18 This page is for your notes. Pioneer Global High Yield Fund | Semiannual Report | 4/30/18 73 This page is for your notes. 74 Pioneer Global High Yield Fund | Semiannual Report | 4/30/18 This page is for your notes. Pioneer Global High Yield Fund | Semiannual Report | 4/30/18 75 This page is for your notes. 76 Pioneer Global High Yield Fund | Semiannual Report | 4/30/18 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 us.askamundipioneer@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 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) 2018 Amundi Pioneer Asset Management 19382-12-0618 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. N/A (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. N/A (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. N/A (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. N/A (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 Amudi Pioneer Asset Management, Inc, 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. N/A (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. N/A (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. Disclosure of Securities Lending Activities for Closed-End Management Investment Companies. (a) If the registrant is a closed-end management investment company, provide the following dollar amounts of income and compensation related to the securities lending activities of the registrant during its most recent fiscal year: N/A (1) Gross income from securities lending activities; N/A (2) All fees and/or compensation for each of the following securities lending activities and related services: any share of revenue generated by the securities lending program paid to the securities lending agent(s) (revenue split); fees paid for cash collateral management services (including fees deducted from a pooled cash collateral reinvestment vehicle) that are not included in the revenue split; administrative fees that are not included in the revenue split; fees for indemnification that are not included in the revenue split; rebates paid to borrowers; and any other fees relating to the securities lending program that are not included in the revenue split, including a description of those other fees; N/A (3) The aggregate fees/compensation disclosed pursuant to paragraph (2); and N/A (4) Net income from securities lending activities (i.e., the dollar amount in paragraph (1) minus the dollar amount in paragraph (3)). If a fee for a service is included in the revenue split, state that the fee is included in the revenue split. N/A (b) If the registrant is a closed-end management investment company, describe the services provided to the registrant by the securities lending agent in the registrants most recent fiscal year. N/A ITEM 13. 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. (Registrant) Pioneer Series Trust VII By (Signature and Title)* /s/ Lisa M. Jones Lisa M. Jones, President & Chief Executive Officer Date June 28, 2018 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 June 28, 2018 By (Signature and Title)* /s/ Mark E. Bradley Mark E. Bradley, Treasurer & Chief Accounting & Financial Officer Date June 28, 2018 * Print the name and title of each signing officer under his or her signature.