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 811-21781 Pioneer Series Trust IV (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: July 31 Date of reporting period: August 1, 2018 through July 31, 2019 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 Balanced ESG Fund (Formerly Pioneer Classic Balanced Fund)* -------------------------------------------------------------------------------- Annual Report | July 31, 2019 -------------------------------------------------------------------------------- Ticker Symbols: Class A AOBLX Class C PCBCX Class K PCBKX Class R CBPRX Class Y AYBLX * Effective September 1, 2019, Pioneer Classic Balanced Fund was renamed Pioneer Balanced ESG Fund. Beginning in March 2021, as permitted by regulations adopted by the Securities and Exchange Commission, paper copies of the Fund's shareholder reports like this one will no longer be sent by mail, unless you specifically request paper copies of the reports from the Fund or from your financial intermediary, such as a broker-dealer, bank or insurance company. Instead, the reports will be made available on the Fund's website, and you will be notified by mail each time a report is posted and provided with a website link to access the report. If you already elected to receive shareholder reports electronically, you will not be affected by this change and you need not take any action. You may elect to receive shareholder reports and other communications electronically by contacting your financial intermediary or, if you invest directly with the Fund, by calling 1-800-225-6292. You may elect to receive all future reports in paper free of charge. If you invest directly with the Fund, you can inform the Fund that you wish to continue receiving paper copies of your shareholder reports by calling 1-800-225-6292. If you invest through a financial intermediary, you can contact your financial intermediary to request that you continue to receive paper copies of your shareholder reports. Your election to receive reports in paper will apply to all funds held in your account if you invest through your financial intermediary or all funds held within the Pioneer Fund complex if you invest directly. [LOGO] Amundi Pioneer ============== ASSET MANAGEMENT visit us: www.amundipioneer.com/us Table of Contents President's Letter 2 Portfolio Management Discussion 4 Portfolio Summary 11 Prices and Distributions 12 Performance Update 13 Comparing Ongoing Fund Expenses 18 Schedule of Investments 20 Financial Statements 46 Notes to Financial Statements 55 Report of Independent Registered Public Accounting Firm 68 Additional Information 70 Trustees, Officers and Service Providers 71 Pioneer Balanced ESG Fund | Annual Report | 7/31/19 1 President's Letter Since 1928, active portfolio management based on in-depth, fundamental research, has been the foundation of Amundi Pioneer's investment approach. We believe an active management investment strategy is a prudent approach to investing, especially during periods of market volatility, which can result from any number of risk factors, including slow U.S. economic growth, rising interest rates, and geopolitical factors. Of course, in today's global economy, risk factors extend well beyond U.S. borders. In fact, it's not unusual for political and economic issues on the international front to cause or contribute to volatility in U.S. markets. At Amundi Pioneer, each security under consideration is researched by our team of experienced investment professionals, who communicate directly with the management teams of those companies. At the end of this research process, if we have conviction in a company's business model and management team, and regard the security as a potentially solid investment opportunity, an Amundi Pioneer portfolio manager makes an active decision to invest in that security. The portfolio resulting from these decisions represents an expression of his or her convictions, and strives to balance overall risk and return opportunity. As an example, the Standard & Poor's 500 Index -- the predominant benchmark for many U.S. Large-Cap Core Equity funds -- has 500 stocks. An Amundi Pioneer portfolio manager chooses to invest in only those companies that he or she believes can offer the most attractive opportunities to pursue the fund's investment objective, thus potentially benefiting the fund's shareowners. This process results in a portfolio that does not own all 500 stocks, but a much narrower universe. The same active decision to invest in a company is also applied when we decide to sell a security, due to changing fundamentals, valuation concerns, or market risks. We apply this active decision-making across all of our equity, fixed-income, and global portfolios. Today, as investors, we have many options. It is our view that active management can serve shareholders well not only when markets are thriving, but also during periods of market volatility and uncertainty, thus making it a compelling investment choice. As you consider the many choices today, 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. 2 Pioneer Balanced ESG Fund | Annual Report | 7/31/19 We greatly appreciate the trust you have placed in us and look forward to continuing to serve you in the future. Sincerely, /s/ Lisa M. Jones Lisa M. Jones Head of the Americas, President and CEO of U.S. Amundi Pioneer Asset Management USA, Inc. July 31, 2019 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 Balanced ESG Fund | Annual Report | 7/31/19 3 Portfolio Management Discussion | 7/31/19 In the following interview, Walter Hunnewell, Jr., and Brad Komenda discuss the factors that affected the performance of Pioneer Balanced ESG Fund* during the 12-month period ended July 31, 2019. Mr. Hunnewell, a vice president and portfolio manager at Amundi Pioneer Investment Management, Inc. (Amundi Pioneer), Mr. Komenda, Deputy Director of Investment-Grade Corporates, a senior vice president, and a portfolio manager at Amundi Pioneer, and Lawrence Zeno, a vice president and portfolio manager at Amundi Pioneer, are responsible for the day-to-day management of the Fund. Q How did the Fund perform during the 12-month period ended July 31, 2019? A Pioneer Balanced ESG Fund's Class A shares returned 8.51% at net asset value during the 12-month period ended July 31, 2019, while the Fund's benchmarks, the Standard & Poor's 500 Index (the S&P 500) and the Bloomberg Barclays U.S. Government/Credit Bond Index (the Bloomberg Barclays Index), returned 7.99% and 8.60%, respectively. During the same period, the average return of the 706 mutual funds in Morningstar's 50% to 70% Equity Allocation Funds category was 4.31%. Q How would you describe the domestic investment environment during the 12-month period ended July 31, 2019, and the Fund's positioning during the period? A We saw significant ebbs and flows in the markets during the 12-month period as investors' views concerning the economy, the direction of interest rates, and the state of global trade relations adapted to changing economic reports, which often resulted in bouts of volatility. By the end of the period, however, both the stock and bond markets had produced solid, positive results. During the closing weeks of 2018, around the middle of the 12-month period, the performance of both equities and fixed-income investments struggled amid heightened market volatility. The spike in volatility derived primarily from concerns about the possibility of decelerating corporate profit growth and worries that the U.S. Federal Reserve (the Fed) would continue to tighten monetary policy by increasing interest rates for a fourth time during the calendar year. Reports of foundering trade negotiations between the U.S. and some of its key trading partners -- particularly China -- had a further adverse effect on the stock market. The Fed did in fact raise rates again in December 2018, thus confirming investors' earlier trepidations. * Effective September 1, 2019, Pioneer Classic Balanced Fund was renamed Pioneer Balanced ESG Fund, and the Fund adopted a new investment policy (see Note 7). 4 Pioneer Balanced ESG Fund | Annual Report | 7/31/19 As the first half of 2019 progressed, however, equity markets rebounded as the Fed adopted a less aggressive tone with regard to future rate hikes, and even began hinting about future rate cuts. At the end of the period, the Fed did reduce the federal funds rate, but news that trade talks had once again reached an impasse had a slight dampening effect on the stock market's recovery. Over the first half of the 12-month period, the performance of both growth and value stocks seemed to move in lockstep. Over the final six months, however, growth stocks, as measured by the Russell 1000 Growth Index, significantly outperformed value stocks, as measured by the Russell 1000 Value Index, and ended up doubling the full 12-month return of value stocks (10.82% for growth versus 5.20% for value). The second half of the 12-month period was also a good time to be in the fixed-income market, as the performance of all major fixed-income indices was strongly positive between January and July 2019. The rally helped produce attractive returns across most asset classes for the full 12-month period, with the Fund's fixed-income benchmark, the Bloomberg Barclays Index (up by 8.60%), turning in one of the better performances. With regard to the Fund's positioning, during the 12-month period we consistently maintained the portfolio's equity allocation at roughly 62% or 63% of invested assets, with 37% or 38% allocated to bonds and other income-oriented investments. Q What were the principal factors driving the Fund's benchmark-relative performance during the 12-month period ended July 31, 2019? A Within equities, positive stock selection results benefited the Fund's performance versus the S&P 500. Throughout the 12-month period, we maintained our core investment strategy with regard to equities, with good portfolio exposures to both value and growth stocks. However, we did tilt the Fund's holdings toward growth stocks, a tactic that aided benchmark-relative returns. Sector allocation results detracted from the Fund's benchmark-relative performance within equities over the 12-month period, as the portfolio's energy holdings underperformed (energy was the weakest sector within the S&P 500 over the 12-month period). Meanwhile, the portfolio's underweights to utilities and real estate also hurt relative returns, as those two sectors were among the best performers in the S&P 500 over the period. On the positive side, performance relative to the S&P 500 benefited from the Fund's overweight to the consumer discretionary sector. Pioneer Balanced ESG Fund | Annual Report | 7/31/19 5 Within fixed income, a short-duration portfolio stance of roughly --1 year relative to the Bloomberg Barclays Index detracted from benchmark-relative performance during the 12-month period, as longer-duration portfolios outperformed in an environment featuring declining interest rates. (Duration is a measure of the sensitivity of the price, or the value of principal, of a fixed-income investment to a change in interest rates, expressed as a number of years.) Q What specific investments or portfolio allocations had noteworthy effects on the Fund's benchmark-relative performance during the 12-month period ended July 31, 2019? A Individual stock positions held in the Fund that aided benchmark-relative performance during the 12-month period included networking giant Cisco Systems; Chipotle Mexican Grill, a restaurant chain specializing in Mexican food; Motorola Solutions, a radio communications company focused on first responders; and Microsoft, the software corporation. Cisco was the top contributor to the Fund's benchmark-relative performance during the period, as the company successfully introduced new products for its corporate customer base. Motorola expanded its offerings during the period, thus boosting the stock's performance, while Microsoft has continued to experience great success in transforming its products to cloud offerings. Notable detractors from the Fund's benchmark-relative returns within equities included positions in two energy companies: Occidental Petroleum, which made an acquisition that was not well received by investors, and Targa Resources, a natural gas processing and gas liquids pipeline company. In addition, the Fund's position in Bank of America underperformed during the period, and we opted to sell the stock due to, among other reasons, concerns that the company's many workforce reductions could potentially affect employee morale. In place of Bank of America, we established an equity position in another financial firm, JPMorgan Chase. Other notable equity investments we sold from the portfolio during the period were Chevron (energy) and Amgen, a pharmaceutical company facing legal challenges to the patent protections on some of its key products. Stocks that we added to the portfolio during the 12-month period included Amazon, the e-Commerce giant, and Novo Nordisk, a pharmaceutical corporation with next-generation insulin products. Within fixed income, aside from the duration positioning mentioned earlier, the largest detractor from the Fund's benchmark-relative returns was the portfolio's out-of-benchmark position in 30-year Treasury Inflation-Protected Securities (TIPS), which largely underperformed many other fixed-income groups over the 12-month period as breakeven inflation 6 Pioneer Balanced ESG Fund | Annual Report | 7/31/19 levels declined sharply. Overall sector allocation results within fixed income were positive, led by the Fund's holdings in the financials and utilities groups. The Fund's underweighting of Treasury securities also helped benchmark-relative performance in a market environment that saw riskier assets outperform. Other positive contributors to the Fund's benchmark-relative performance within fixed income included individual security selection results and our relative emphasis on owning risk-oriented securities, such as corporate bonds. Q Could you discuss the Fund's commitment to environmental, social, and governance (ESG) investing? A ESG refers to the three primary factors in measuring the sustainability and ethical impact of an investment in a company or business. With its focus on companies with sustainable business models, the portfolio follows an ESG-friendly investment approach. The Fund's name change to Pioneer Balanced ESG Fund and the adoption of a new investment philosophy to apply certain ESG criteria to the Fund's investments, effective September 1 of this year, emphasize our commitment to that process. Per the prospectus, the Fund will not invest in companies significantly involved in the production of alcohol, tobacco products, certain controversial military weapons -- including cluster weapons, anti-personnel mines, nuclear, biological, and chemical weapons -- and the operation of coal mines, gambling casinos, and other gaming businesses. In addition, the Fund's management team uses an ESG screening process, which includes evaluating a company's deployment and treatment of human capital (for example, employee morale), product safety, and social opportunities. "Governance" assessment categories typically include corporate governance and business ethics (such as accounting principles), among other considerations. Q Did you invest the Fund in any derivative securities during the 12-month period ended July 31, 2019? A Yes, we did invest in some Treasury futures during the period, primarily to manage the portfolio's duration on the fixed-income side. Even though the Fund's overall short-duration position detracted from benchmark-relative performance during the period, the futures positions had no material effect. Q Did the Fund's yield, or distributions* to shareholders, change during the 12 months ended July 31, 2019? A Overall, the Fund's yield remained relatively steady during the 12-month period, despite some declines in Treasury rates. * Distributions are not guaranteed. Pioneer Balanced ESG Fund | Annual Report | 7/31/19 7 Q What is your investment outlook? A We do not believe the U.S. economy is heading toward recession, and so we have positioned the Fund in the expectation that there will be continued economic growth. Within equities, we have maintained the Fund's overweights relative to the S&P 500 in the consumer discretionary and financial sectors, and in materials and industrials. In information technology, real estate, and energy, the Fund is equal-weighted relative to the S&P 500. Despite the portfolio's current equity weightings, which imply an optimistic view of the economy, we also are aware that things could change. For example, a breakdown in trade negotiations could undermine investor confidence. For this and other reasons, we are being especially selective regarding the Fund's weightings in the industrials and materials sectors. On the fixed-income side, we are closely monitoring foreign money flows into the U.S. capital markets. Any significant changes in global cash flows could affect the Fund's positioning, given that such changes could very well affect valuations. Overall, we think both consumers and corporate institutions are financially healthy. Looking forward, we think the primary factor that could signal the possibility of recession is the Treasury yield curve, where long-term rates, which normally are higher than short-term rates, have at times fallen below short-term rates in recent months, thus creating an "inverted" curve. In the past, inverted yield curves have sometimes foreshadowed a deterioration in economic conditions. Right now, however, we believe the economy should continue along on a healthy path. 8 Pioneer Balanced ESG Fund | Annual Report | 7/31/19 Please refer to the Schedule of Investments on pages 20-45 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. When interest rates rise, the prices of fixed-income securities in the Fund will generally fall. Conversely, when interest rates fall, the prices of fixed-income securities in the Fund will generally rise. Investments in the Fund are subject to possible loss due to the financial failure of issuers of underlying securities and their inability to meet their debt obligations. Prepayment risk is the chance that an issuer may exercise its right to prepay its security, if falling interest rates prompt the issuer to do so. Forced to reinvest the unanticipated proceeds at lower interest rates, the Fund would experience a decline in income and lose the opportunity for additional price appreciation. The securities issued by U.S. government-sponsored entities (e.g., FNMA, Freddie Mac) are neither guaranteed nor issued by the U.S. government. 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 prepayments. Investments in high-yield or lower-rated securities are subject to greater-than-average price volatility, illiquidity and possibility of default. Investing in foreign and/or emerging markets securities involves risks relating to interest rates, currency exchange rates, economic, and political conditions. The Fund invests in REIT securities, the value of which can fall for a variety of reasons, such as declines in rental income, fluctuating interest rates, poor property management, environmental liabilities, uninsured damage, increased competition, or changes in real estate tax laws. The Fund generally excludes corporate issuers that are significantly involved in certain business activities (ESG criteria). Excluding specific issuers limits the universe of investments available to the Fund, which may mean forgoing some investment opportunities available to funds without similar ESG criteria. Pioneer Balanced ESG Fund | Annual Report | 7/31/19 9 At times, the Fund's investments may represent industries or sectors that are interrelated or have common risks, making them more susceptible to any economic, political, or regulatory developments or other risks affecting those industries and sectors. These risks may increase share price volatility. Before investing, consider the product's investment objectives, risks, charges and expenses. Contact your advisor or Amundi Pioneer Asset Management, Inc., for a prospectus or summary prospectus containing this information. Read it carefully. Any information in this shareholder report regarding market or economic trends or the factors influencing the Fund's historical or future performance are statements of opinion as of the date of this report. Past performance is no guarantee of future results. 10 Pioneer Balanced ESG Fund | Annual Report | 7/31/19 Portfolio Summary | 7/31/19 Portfolio Diversification -------------------------------------------------------------------------------- (As a percentage of total investments)* [THE FOLLOWING DATA WAS REPRESENTED AS A PIE CHART IN THE PRINTED MATERIAL] Common Stocks 64.8% U.S. Government and Agency Obligations 12.1% Corporate Bonds 10.4% Collateralized Mortgage Obligations 9.0% Asset Backed Securities 1.2% Senior Secured Floating Rate Loan Interests 0.9% Insurance-Linked Securities 0.8% Affiliated Closed-End Fund(l) 0.3% Municipal Bonds 0.2% Convertible Preferred Stocks 0.2% Foreign Government Bonds 0.1% Sector Distribution -------------------------------------------------------------------------------- (As a percentage of total investments)* [THE FOLLOWING DATA WAS REPRESENTED AS A PIE CHART IN THE PRINTED MATERIAL] Mortgage Securities 15.4% Financials 14.6% Information Technology 14.4% Consumer Discretionary 8.6% Health Care 8.0% Industrials 7.7% Communication Services 6.5% Energy 4.9% Government 4.3% Consumer Staples 4.2% Materials 3.0% Asset Backed Securities 2.8% Real Estate 2.1% Consumer Non-Cyclical 1.6% Utilities 1.4% Consumer Cyclical 0.3% Technology 0.2% 10 Largest Holdings -------------------------------------------------------------------------------- (As a percentage of total investments)* 1. Microsoft Corp. 4.45% -------------------------------------------------------------------------------- 2. Alphabet, Inc. 3.04 -------------------------------------------------------------------------------- 3. Amazon.com, Inc. 2.92 -------------------------------------------------------------------------------- 4. Cisco Systems, Inc. 2.36 -------------------------------------------------------------------------------- 5. CME Group, Inc. 2.04 -------------------------------------------------------------------------------- 6. Motorola Solutions, Inc. 1.96 -------------------------------------------------------------------------------- 7. Apple, Inc. 1.89 -------------------------------------------------------------------------------- 8. Procter & Gamble Co. 1.79 -------------------------------------------------------------------------------- 9. JPMorgan Chase & Co. 1.76 -------------------------------------------------------------------------------- 10. Discover Financial Services 1.62 -------------------------------------------------------------------------------- * 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 securities. (l) Pioneer ILS Interval Fund is an affiliated closed-end fund managed by Amundi Pioneer Asset Management, Inc. Pioneer Balanced ESG Fund | Annual Report | 7/31/19 11 Prices and Distributions | 7/31/19 Net Asset Value per Share -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- Class 7/31/19 7/31/18 -------------------------------------------------------------------------------- A $9.57 $9.64 -------------------------------------------------------------------------------- C $9.50 $9.57 -------------------------------------------------------------------------------- K $9.56 $9.63 -------------------------------------------------------------------------------- R $9.59 $9.64 -------------------------------------------------------------------------------- Y $9.64 $9.71 -------------------------------------------------------------------------------- Distributions per Share: 8/1/18-7/31/19 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- Net Investment Short-Term Long-Term Class Income Capital Gains Capital Gains -------------------------------------------------------------------------------- A $0.1760 $ -- $0.6304 -------------------------------------------------------------------------------- C $0.1004 $ -- $0.6304 -------------------------------------------------------------------------------- K $0.1927 $ -- $0.6304 -------------------------------------------------------------------------------- R $0.1343 $ -- $0.6304 -------------------------------------------------------------------------------- Y $0.2029 $ -- $0.6304 -------------------------------------------------------------------------------- Index Definitions -------------------------------------------------------------------------------- The Standard & Poor's 500 Index is an unmanaged, commonly used measure of the broad U.S. stock market. The Bloomberg Barclays U.S. Government/ Credit Bond Index is unmanaged and measures the performance of debt obligations of the U.S. government agencies and investment-grade domestic corporate debt. 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 on pages 13-17. 12 Pioneer Balanced ESG Fund | Annual Report | 7/31/19 Performance Update | 7/31/19 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 Balanced ESG Fund at public offering price during the periods shown, compared to that of the Standard & Poor's 500 Index and Bloomberg Barclays U.S. Government/Credit Bond Index. Average Annual Total Returns (As of July 31, 2019) ------------------------------------------------------------- Bloomberg Barclays U.S. Govern- Net Public ment/ Asset Offering S&P Credit Value Price 500 Bond Period (NAV) (POP) Index Index ------------------------------------------------------------- 10 years 9.16% 8.66% 14.03% 3.92% 5 years 6.85 5.87 11.34 3.16 1 year 8.51 3.62 7.99 8.60 ------------------------------------------------------------- Expense Ratio (Per prospectus dated December 1, 2018) ----------------------------------------------------------- Gross Net ----------------------------------------------------------- 1.07% 1.03% ----------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $10,000 Investment Bloomberg Pioneer Barclays U.S. Balanced ESG S&P 500 Government/Credit Fund Index Bond Index 7/09 $ 9,550 $10,000 $10,000 7/10 $10,512 $11,384 $10,894 7/11 $12,096 $13,621 $11,387 7/12 $12,581 $14,864 $12,349 7/13 $14,495 $18,580 $12,103 7/14 $16,470 $21,728 $12,578 7/15 $17,595 $24,163 $12,898 7/16 $17,749 $25,519 $13,772 7/17 $19,335 $29,613 $13,663 7/18 $21,140 $34,422 $13,531 7/19 $22,938 $37,171 $14,695 Call 1-800-225-6292 or visit www.amundipioneer.com/us 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. NAV returns would have been lower had sales charges been reflected. POP returns reflect deduction of the 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 December 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. Expense ratios in the financial highlights, unlike those shown in the prospectus, do not reflect acquired fund fees and expenses. 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 see the financial highlights for a more current expense ratio. Pioneer Balanced ESG Fund | Annual Report | 7/31/19 13 Performance Update | 7/31/19 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 Balanced ESG Fund during the periods shown, compared to that of the Standard & Poor's 500 Index and Bloomberg Barclays U.S. Government/Credit Bond Index. Average Annual Total Returns (As of July 31, 2019) ------------------------------------------------------------- Bloomberg Barclays U.S. Govern- ment/ S&P Credit If If Re- 500 Bond Period Held deemed Index Index ------------------------------------------------------------- 10 years 8.30% 8.30% 14.03% 3.92% 5 years 6.07 6.07 11.34 3.16 1 year 7.68 7.68 7.99 8.60 ------------------------------------------------------------- Expense Ratio (Per prospectus dated December 1, 2018) ----------------------------------------------------------- Gross ----------------------------------------------------------- 1.80% ----------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $10,000 Investment Bloomberg Pioneer Barclays U.S. Balanced ESG S&P 500 Government/Credit Fund Index Bond Index 7/09 $10,000 $10,000 $10,000 7/10 $10,923 $11,384 $10,894 7/11 $12,451 $13,621 $11,387 7/12 $12,839 $14,864 $12,349 7/13 $14,681 $18,580 $12,103 7/14 $16,532 $21,728 $12,578 7/15 $17,547 $24,163 $12,898 7/16 $17,553 $25,519 $13,772 7/17 $18,975 $29,613 $13,663 7/18 $20,612 $34,422 $13,531 7/19 $22,196 $37,171 $14,695 Call 1-800-225-6292 or visit www.amundipioneer.com/us 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. NAV 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. Expense ratios in the financial highlights, unlike those shown in the prospectus, do not reflect acquired fund fees and expenses. 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 see the financial highlights for a more current expense ratio. 14 Pioneer Balanced ESG Fund | Annual Report | 7/31/19 Performance Update | 7/31/19 Class K Shares Investment Returns -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $5 million investment made in Class K shares of Pioneer Balanced ESG Fund during the periods shown, compared to that of the Standard & Poor's 500 Index and Bloomberg Barclays U.S. Government/Credit Bond Index. Average Annual Total Returns (As of July 31, 2019) ---------------------------------------------------------- Bloomberg Barclays U.S. Govern- Net ment/ Asset S&P Credit Value 500 Bond Period (NAV) Index Index ---------------------------------------------------------- 10 years 9.25% 14.03% 3.92% 5 years 7.04 11.34 3.16 1 year 8.72 7.99 8.60 ---------------------------------------------------------- Expense Ratio (Per prospectus dated December 1, 2018) ----------------------------------------------------------- Gross ----------------------------------------------------------- 0.75% ----------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $5 Million Investment Bloomberg Pioneer Barclays U.S. Balanced ESG S&P 500 Government/Credit Fund Index Bond Index 7/09 $ 5,000,000 $ 5,000,000 $5,000,000 7/10 $ 5,503,765 $ 5,691,838 $5,447,198 7/11 $ 6,333,062 $ 6,810,343 $5,693,647 7/12 $ 6,586,755 $ 7,432,245 $6,174,476 7/13 $ 7,588,838 $ 9,290,125 $6,051,260 7/14 $ 8,623,183 $10,863,884 $6,288,901 7/15 $ 9,211,827 $12,081,407 $6,448,954 7/16 $ 9,291,918 $12,759,653 $6,885,885 7/17 $10,162,048 $14,806,561 $6,831,576 7/18 $11,144,051 $17,211,172 $6,765,640 7/19 $12,115,541 $18,585,623 $7,347,628 Call 1-800-225-6292 or visit www.amundipioneer.com/us for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. The performance shown for Class K shares for the period prior to the commencement of operations of Class K shares on December 1, 2015, is the net asset value performance of the Fund's Class A shares, which has not been restated to reflect any differences in expenses, including Rule 12b-1 fees applicable to Class A shares. Since fees for Class A shares generally are higher than those of Class K shares, the performance of Class K shares prior to their inception on December 1, 2015, would have been higher than the performance shown. For the period beginning December 1, 2015, the actual performance of Class K shares is reflected. Class K shares are not subject to sales charges and are available for limited groups of eligible investors, including institutional investors. All results are historical and assume the reinvestment of dividends and capital gains. 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. Expense ratios in the financial highlights, unlike those shown in the prospectus, do not reflect acquired fund fees and expenses. 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 see the financial highlights for a more current expense ratio. Pioneer Balanced ESG Fund | Annual Report | 7/31/19 15 Performance Update | 7/31/19 Class R Shares Investment Returns -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $10,000 investment made in Class R shares of Pioneer Balanced ESG Fund during the periods shown, compared to that of the Standard & Poor's 500 Index and Bloomberg Barclays U.S. Government/Credit Bond Index. Average Annual Total Returns (As of July 31, 2019) ----------------------------------------------------------- Bloomberg Barclays U.S. Govern- Net ment/ Asset S&P Credit Value 500 Bond Period (NAV) Index Index ----------------------------------------------------------- 10 years 9.08% 14.03% 3.92% 5 years 6.69 11.34 3.16 1 year 8.24 7.99 8.60 ----------------------------------------------------------- Expense Ratio (Per prospectus dated December 1, 2018) ----------------------------------------------------------- Gross Net ----------------------------------------------------------- 1.47% 1.34% ----------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $10,000 Investment Bloomberg Pioneer Barclays U.S. Balanced ESG S&P 500 Government/Credit Fund Index Bond Index 7/09 $10,000 $10,000 $10,000 7/10 $11,008 $11,384 $10,894 7/11 $12,666 $13,621 $11,387 7/12 $13,174 $14,864 $12,349 7/13 $15,178 $18,580 $12,103 7/14 $17,246 $21,728 $12,578 7/15 $18,424 $24,163 $12,898 7/16 $18,547 $25,519 $13,772 7/17 $20,175 $29,613 $13,663 7/18 $22,026 $34,422 $13,531 7/19 $23,839 $37,171 $14,695 Call 1-800-225-6292 or visit www.amundipioneer.com/us for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. The performance shown for Class R shares for the period prior to the commencement of operations of Class R shares on July 1, 2015, is the net asset value performance of the Fund's Class A shares, which has not been restated to reflect any differences in expenses, including Rule 12b-1 fees applicable to Class A shares. Since fees for Class A shares generally are higher than those of Class R shares, the performance of Class R shares prior to their inception would have been higher than the performance shown. For the period beginning July 1, 2015, the actual performance of Class R shares is reflected. Class R shares are not subject to sales charges and are available for limited groups of eligible investors, including institutional investors. All results are historical and assume the reinvestment of dividends and capital gains. Other share classes are available for which performance and expenses will differ. Performance results reflect any applicable expense waivers in effect during the periods shown. Without such waivers Fund performance would be lower. Waivers may not be in effect for all funds. Certain fee waivers are contractual through a specified period. Otherwise, fee waivers can be rescinded at any time. See the prospectus and financial statements for more information. The net expense ratio reflects the contractual expense limitation currently in effect through December 1, 2019 for Class R shares. There can be no assurance that Amundi Pioneer will extend the expense limitation beyond such time. Please see the prospectus and financial statements for more information. Expense ratios in the financial highlights, unlike those shown in the prospectus, do not reflect acquired fund fees and expenses. 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 see the financial highlights for a more current expense ratio. 16 Pioneer Balanced ESG Fund | Annual Report | 7/31/19 Performance Update | 7/31/19 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 Balanced ESG Fund during the periods shown, compared to that of the Standard & Poor's 500 Index and Bloomberg Barclays U.S. Government/Credit Bond Index. Average Annual Total Returns (As of July 31, 2019) ------------------------------------------------------------- Bloomberg Barclays U.S. Govern- Net ment/ Asset S&P Credit Value 500 Bond Period (NAV) Index Index ------------------------------------------------------------- 10 years 9.47% 14.03% 3.92% 5 years 7.11 11.34 3.16 1 year 8.77 7.99 8.60 ------------------------------------------------------------- Expense Ratio (Per prospectus dated December 1, 2018) ----------------------------------------------------------- Gross Net ----------------------------------------------------------- 0.83% 0.69% ----------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $5 Million Investment Bloomberg Pioneer Barclays U.S. Balanced ESG S&P 500 Government/Credit Fund Index Bond Index 7/09 $ 5,000,000 $ 5,000,000 $5,000,000 7/10 $ 5,529,022 $ 5,691,838 $5,447,198 7/11 $ 6,374,702 $ 6,810,343 $5,693,647 7/12 $ 6,655,360 $ 7,432,245 $6,174,476 7/13 $ 7,701,144 $ 9,290,125 $6,051,260 7/14 $ 8,761,755 $10,863,884 $6,288,901 7/15 $ 9,390,314 $12,081,407 $6,448,954 7/16 $ 9,479,597 $12,759,653 $6,885,885 7/17 $10,357,193 $14,806,561 $6,831,576 7/18 $11,358,931 $17,211,172 $6,765,640 7/19 $12,354,963 $18,585,623 $7,347,628 Call 1-800-225-6292 or visit www.amundipioneer.com/us 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 December 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. Expense ratios in the financial highlights, unlike those shown in the prospectus, do not reflect acquired fund fees and expenses. 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 see the financial highlights for a more current expense ratio. Pioneer Balanced ESG Fund | Annual Report | 7/31/19 17 Comparing Ongoing Fund Expenses As a shareowner in the Fund, you incur two types of costs: (1) ongoing costs, including management fees, distribution and/or service (12b-1) fees, and other Fund expenses; and (2) transaction costs, including sales charges (loads) on purchase payments. 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 Balanced ESG Fund Based on actual returns from February 1, 2019 through July 31, 2019. ------------------------------------------------------------------------------------------ Share Class A C K R Y ------------------------------------------------------------------------------------------ Beginning Account $1,000.00 $1,000.00 $1,000.00 $1,000.00 $1,000.00 Value on 2/1/19 ------------------------------------------------------------------------------------------ Ending Account $1,105.78 $1,103.05 $1,107.13 $1,061.18 $1,107.41 Value (after expenses) on 7/31/19 ------------------------------------------------------------------------------------------ Expenses Paid $5.27 $9.13 $3.97 $6.64 $3.61 During Period* ------------------------------------------------------------------------------------------ * Expenses are equal to the Fund's annualized expense ratio of 1.01%, 1.75%, 0.76%, 1.30%, and 0.69% for Class A, Class C, Class K, Class R, and Class Y shares respectively, and multiplied by the average account value over the period multiplied by 181/365 (to reflect the partial year period) 18 Pioneer Balanced ESG Fund | Annual Report | 7/31/19 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 Balanced ESG Fund Based on a hypothetical 5% return per year before expenses, reflecting the period from February 1, 2019 through July 31, 2019. ------------------------------------------------------------------------------------------ Share Class A C K R Y ------------------------------------------------------------------------------------------ Beginning Account $1,000.00 $1,000.00 $1,000.00 $1,000.00 $1,000.00 Value on 2/1/19 ------------------------------------------------------------------------------------------ Ending Account $1,019.79 $1,016.12 $1,021.03 $1,018.35 $1,021.37 Value (after expenses) on 7/31/19 ------------------------------------------------------------------------------------------ Expenses Paid $5.06 $8.75 $3.81 $6.51 $3.46 During Period* ------------------------------------------------------------------------------------------ * Expenses are equal to the Fund's annualized expense ratio of 1.01%, 1.75%, 0.76%, 1.30%, and 0.69% for Class A, Class C, Class K, Class R, and Class Y shares respectively, and multiplied by the average account value over the period multiplied by 181/365 (to reflect the partial year period) Pioneer Balanced ESG Fund | Annual Report | 7/31/19 19 Schedule of Investments | 7/31/19 ----------------------------------------------------------------------------------------------------------------------- Shares Value ----------------------------------------------------------------------------------------------------------------------- UNAFFILIATED ISSUERS -- 96.3% COMMON STOCKS -- 62.6% of Net Assets Aerospace & Defense -- 1.4% 22,865 Raytheon Co. $ 4,168,061 ------------ Total Aerospace & Defense $ 4,168,061 ----------------------------------------------------------------------------------------------------------------------- Banks -- 2.2% 20,756 Comerica, Inc. $ 1,519,339 44,262 JPMorgan Chase & Co. 5,134,392 ------------ Total Banks $ 6,653,731 ----------------------------------------------------------------------------------------------------------------------- Beverages -- 1.3% 31,852 PepsiCo., Inc. $ 4,071,004 ------------ Total Beverages $ 4,071,004 ----------------------------------------------------------------------------------------------------------------------- Building Products -- 0.1% 19,057(a) Resideo Technologies, Inc. $ 359,415 ------------ Total Building Products $ 359,415 ----------------------------------------------------------------------------------------------------------------------- Capital Markets -- 3.0% 3,283 BlackRock, Inc. $ 1,535,393 30,664 CME Group, Inc. 5,961,695 12,958 T.Rowe Price Group, Inc. 1,469,308 ------------ Total Capital Markets $ 8,966,396 ----------------------------------------------------------------------------------------------------------------------- Chemicals -- 1.2% 31,275 Dow, Inc. $ 1,514,961 7,164 Ecolab, Inc. 1,445,193 16,959 HB Fuller Co. 810,810 ------------ Total Chemicals $ 3,770,964 ----------------------------------------------------------------------------------------------------------------------- Commercial Services & Supplies -- 2.2% 90,476(a) IAA, Inc. $ 4,229,753 90,476 KAR Auction Services, Inc. 2,419,328 ------------ Total Commercial Services & Supplies $ 6,649,081 ----------------------------------------------------------------------------------------------------------------------- Communications Equipment -- 4.2% 124,358 Cisco Systems, Inc. $ 6,889,433 34,398 Motorola Solutions, Inc. 5,708,692 ------------ Total Communications Equipment $ 12,598,125 ----------------------------------------------------------------------------------------------------------------------- Consumer Finance -- 1.6% 52,615 Discover Financial Services $ 4,721,670 ------------ Total Consumer Finance $ 4,721,670 ----------------------------------------------------------------------------------------------------------------------- Containers & Packaging -- 0.8% 18,439 Ball Corp. $ 1,318,020 23,546 International Paper Co. 1,033,905 ------------ Total Containers & Packaging $ 2,351,925 ----------------------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 20 Pioneer Balanced ESG Fund | Annual Report | 7/31/19 ----------------------------------------------------------------------------------------------------------------------- Shares Value ----------------------------------------------------------------------------------------------------------------------- Diversified Telecommunication Services -- 2.1% 131,514 AT&T, Inc. $ 4,478,052 147,191 CenturyLink, Inc. 1,779,539 ------------ Total Diversified Telecommunication Services $ 6,257,591 ----------------------------------------------------------------------------------------------------------------------- Electrical Equipment -- 0.4% 17,407 Emerson Electric Co. $ 1,129,366 ------------ Total Electrical Equipment $ 1,129,366 ----------------------------------------------------------------------------------------------------------------------- Electronic Equipment, Instruments & Components -- 0.5% 17,217 TE Connectivity, Ltd. $ 1,590,851 ------------ Total Electronic Equipment, Instruments & Components $ 1,590,851 ----------------------------------------------------------------------------------------------------------------------- Entertainment -- 0.7% 22,459(a) Electronic Arts, Inc. $ 2,077,458 ------------ Total Entertainment $ 2,077,458 ----------------------------------------------------------------------------------------------------------------------- Equity Real Estate Investment Trusts (REITs) -- 1.9% 17,769 Crown Castle International Corp. $ 2,367,897 8,878 Digital Realty Trust, Inc. 1,015,288 2,549 Equinix, Inc. 1,279,853 7,714 Simon Property Group, Inc. 1,251,211 ------------ Total Equity Real Estate Investment Trusts (REITs) $ 5,914,249 ----------------------------------------------------------------------------------------------------------------------- Food & Staples Retailing -- 0.4% 16,545 Sysco Corp. $ 1,134,491 ------------ Total Food & Staples Retailing $ 1,134,491 ----------------------------------------------------------------------------------------------------------------------- Food Products -- 0.6% 10,963 Hershey Co. $ 1,663,526 ------------ Total Food Products $ 1,663,526 ----------------------------------------------------------------------------------------------------------------------- Health Care Equipment & Supplies -- 2.5% 27,955 Abbott Laboratories $ 2,434,881 9,779 Becton Dickinson and Co. 2,472,131 3,958 Cooper Cos., Inc. 1,335,429 9,965 ResMed, Inc. 1,282,496 ------------ Total Health Care Equipment & Supplies $ 7,524,937 ----------------------------------------------------------------------------------------------------------------------- Hotels, Restaurants & Leisure -- 2.4% 41,550 Cedar Fair LP $ 2,097,028 2,102(a) Chipotle Mexican Grill, Inc. 1,672,204 15,887 McDonald's Corp. 3,347,709 ------------ Total Hotels, Restaurants & Leisure $ 7,116,941 ----------------------------------------------------------------------------------------------------------------------- Household Products -- 1.7% 44,254 Procter & Gamble Co. $ 5,223,742 ------------ Total Household Products $ 5,223,742 ----------------------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Balanced ESG Fund | Annual Report | 7/31/19 21 Schedule of Investments | 7/31/19 (continued) ----------------------------------------------------------------------------------------------------------------------- Shares Value ----------------------------------------------------------------------------------------------------------------------- Industrial Conglomerates -- 1.5% 25,510 Honeywell International, Inc. $ 4,399,454 ------------ Total Industrial Conglomerates $ 4,399,454 ----------------------------------------------------------------------------------------------------------------------- Insurance -- 2.5% 23,379 American International Group, Inc. $ 1,308,990 51,735 Progressive Corp. 4,189,500 55,163 Sun Life Financial, Inc. 2,283,197 ------------ Total Insurance $ 7,781,687 ----------------------------------------------------------------------------------------------------------------------- Interactive Media & Services -- 2.9% 7,278(a) Alphabet, Inc. $ 8,866,059 ------------ Total Interactive Media & Services $ 8,866,059 ----------------------------------------------------------------------------------------------------------------------- Internet & Direct Marketing Retail -- 3.1% 4,566(a) Amazon.com, Inc. $ 8,523,718 17,557 eBay, Inc. 723,173 ------------ Total Internet & Direct Marketing Retail $ 9,246,891 ----------------------------------------------------------------------------------------------------------------------- IT Services -- 0.6% 9,750 Accenture Plc $ 1,877,655 ------------ Total IT Services $ 1,877,655 ----------------------------------------------------------------------------------------------------------------------- Leisure Products -- 0.2% 3,872 Hasbro, Inc. $ 469,132 ------------ Total Leisure Products $ 469,132 ----------------------------------------------------------------------------------------------------------------------- Machinery -- 0.5% 28,714 Komatsu, Ltd. (A.D.R.) $ 641,184 21,380 Timken Co. 977,280 ------------ Total Machinery $ 1,618,464 ----------------------------------------------------------------------------------------------------------------------- Metals & Mining -- 0.3% 17,287 Nucor Corp. $ 940,067 ------------ Total Metals & Mining $ 940,067 ----------------------------------------------------------------------------------------------------------------------- Multiline Retail -- 0.4% 8,946 Dollar General Corp. $ 1,198,943 ------------ Total Multiline Retail $ 1,198,943 ----------------------------------------------------------------------------------------------------------------------- Oil, Gas & Consumable Fuels -- 3.1% 14,127 EOG Resources, Inc. $ 1,212,803 33,845 Occidental Petroleum Corp. 1,738,279 12,018 Phillips 66 1,232,566 24,124 Royal Dutch Shell Plc (A.D.R.) 1,517,158 58,991 Targa Resources Corp. 2,295,340 14,879 Valero Energy Corp. 1,268,435 ------------ Total Oil, Gas & Consumable Fuels $ 9,264,581 ----------------------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 22 Pioneer Balanced ESG Fund | Annual Report | 7/31/19 ----------------------------------------------------------------------------------------------------------------------- Shares Value ----------------------------------------------------------------------------------------------------------------------- Pharmaceuticals -- 5.2% 63,872 AstraZeneca Plc (A.D.R.) $ 2,772,683 4,910(a) Elanco Animal Health, Inc. 161,834 24,899 Eli Lilly & Co. 2,712,746 47,184 Merck & Co., Inc. 3,915,800 34,254 Novo Nordisk AS (A.D.R.) 1,641,452 40,147 Zoetis, Inc. 4,612,489 ------------ Total Pharmaceuticals $ 15,817,004 ----------------------------------------------------------------------------------------------------------------------- Semiconductors & Semiconductor Equipment -- 1.7% 10,549 Lam Research Corp. $ 2,200,627 34,734(a) Micron Technology, Inc. 1,559,209 16,411 MKS Instruments, Inc. 1,397,068 ------------ Total Semiconductors & Semiconductor Equipment $ 5,156,904 ----------------------------------------------------------------------------------------------------------------------- Software -- 4.3% 95,348 Microsoft Corp. $ 12,993,072 ------------ Total Software $ 12,993,072 ----------------------------------------------------------------------------------------------------------------------- Specialty Retail -- 1.8% 17,843 Home Depot, Inc. $ 3,812,871 30,297 TJX Cos., Inc. 1,653,004 ------------ Total Specialty Retail $ 5,465,875 ----------------------------------------------------------------------------------------------------------------------- Technology Hardware, Storage & Peripherals -- 2.5% 25,895 Apple, Inc. $ 5,516,671 18,511 HP, Inc. 389,471 30,005 NetApp, Inc. 1,754,992 ------------ Total Technology Hardware, Storage & Peripherals $ 7,661,134 ----------------------------------------------------------------------------------------------------------------------- Textiles, Apparel & Luxury Goods -- 0.5% 15,418 Carter's, Inc. $ 1,434,182 ------------ Total Textiles, Apparel & Luxury Goods $ 1,434,182 ----------------------------------------------------------------------------------------------------------------------- Trading Companies & Distributors -- 0.3% 8,279(a) United Rentals, Inc. $ 1,047,707 ------------ Total Trading Companies & Distributors $ 1,047,707 ----------------------------------------------------------------------------------------------------------------------- TOTAL COMMON STOCKS (Cost $147,232,359) $189,182,335 ----------------------------------------------------------------------------------------------------------------------- CONVERTIBLE PREFERRED STOCK -- 0.1% of Net Assets Banks -- 0.1% 291(b) Bank of America Corp., 7.25% $ 412,475 ------------ Total Banks $ 412,475 ----------------------------------------------------------------------------------------------------------------------- TOTAL CONVERTIBLE PREFERRED STOCK (Cost $361,167) $ 412,475 ----------------------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Balanced ESG Fund | Annual Report | 7/31/19 23 Schedule of Investments | 7/31/19 (continued) ----------------------------------------------------------------------------------------------------------------------- Principal Amount USD ($) Value ----------------------------------------------------------------------------------------------------------------------- ASSET BACKED SECURITIES -- 1.2% of Net Assets 100,000 AXIS Equipment Finance Receivables VI LLC, Series 2018-2A, Class C, 4.27%, 1/20/23 (144A) $ 103,450 300,000 AXIS Equipment Finance Receivables VI LLC, Series 2018-2A, Class D, 4.45%, 6/20/23 (144A) 309,759 200,000 BCC Funding XIV LLC, Series 2018-1A, Class B, 3.39%, 8/21/23 (144A) 202,979 427,734 BXG Receivables Note Trust, Series 2018-A, Class C, 4.44%, 2/2/34 (144A) 439,377 4 Drive Auto Receivables Trust, Series 2016-BA, Class D, 4.53%, 8/15/23 (144A) 4 380,000 Exeter Automobile Receivables Trust, Series 2018-4A, Class C, 3.97%, 9/15/23 (144A) 386,952 150,000 Home Partners of America Trust, Series 2019-1, Class D, 3.406%, 9/17/39 (144A) 149,999 570,000(c) Invitation Homes Trust, Series 2018-SFR3, Class E, 4.314% (1 Month USD LIBOR + 200 bps), 7/17/37 (144A) 570,612 300,000 Progress Residential Trust, Series 2018-SFR3, Class E, 4.873%, 10/17/35 (144A) 312,484 210,000 Progress Residential Trust, Series 2019-SFR2, Class E, 4.142%, 5/17/36 (144A) 214,637 236,950 SpringCastle Funding Asset-Backed Notes, Series 2019-AA, Class A, 3.2%, 5/27/36 (144A) 238,440 492,889 Welk Resorts LLC, Series 2019-AA, Class C, 3.34%, 6/15/38 (144A) 492,363 96,250 Westgate Resorts LLC, Series 2016-1A, Class B, 4.5%, 12/20/28 (144A) 96,166 ----------------------------------------------------------------------------------------------------------------------- TOTAL ASSET BACKED SECURITIES (Cost $3,462,263) $ 3,517,222 ----------------------------------------------------------------------------------------------------------------------- COLLATERALIZED MORTGAGE OBLIGATIONS -- 8.6% of Net Assets 110,000(d) Angel Oak Mortgage Trust I LLC, Series 2019-1, Class M1, 4.5%, 11/25/48 (144A) $ 114,014 200,000(d) BAMLL Commercial Mortgage Securities Trust, Series 2016-FR14, Class A, 2.976%, 2/27/48 (144A) 199,158 500,000 BANK, Series 2017-BNK7, Class AS, 3.748%, 9/15/60 525,689 389,817(c) Bear Stearns ALT-A Trust, Series 2005-7, Class 11A1, 2.806% (1 Month USD LIBOR + 54 bps), 8/25/35 392,327 310,000(c) Bellemeade Re, Ltd., Series 2018-1A, Class M1B, 3.866% (1 Month USD LIBOR + 160 bps), 4/25/28 (144A) 310,798 150,000(c) Bellemeade Re, Ltd., Series 2018-3A, Class M1B, 4.116% (1 Month USD LIBOR + 185 bps), 10/25/27 (144A) 150,214 150,000(c) Bellemeade Re, Ltd., Series 2019-1A, Class M1B, 4.016% (1 Month USD LIBOR + 175 bps), 3/25/29 (144A) 150,666 The accompanying notes are an integral part of these financial statements. 24 Pioneer Balanced ESG Fund | Annual Report | 7/31/19 ----------------------------------------------------------------------------------------------------------------------- Principal Amount USD ($) Value ----------------------------------------------------------------------------------------------------------------------- COLLATERALIZED MORTGAGE OBLIGATIONS -- (continued) 100,000 CD Mortgage Trust, Series 2018-CD7, Class A3, 4.013%, 8/15/51 $ 110,085 250,000 CFCRE Commercial Mortgage Trust, Series 2016-C3, Class A2, 3.597%, 1/10/48 263,021 250,000(c) CHC Commercial Mortgage Trust, Series 2019-CHC, Class E, 4.75% (1 Month USD LIBOR + 235 bps), 6/15/34 (144A) 250,391 500,000(d) Citigroup Commercial Mortgage Trust, Series 2014-GC19, Class B, 4.805%, 3/10/47 538,370 556,403(d) Citigroup Mortgage Loan Trust, Series 2018-RP2, Class A1, 3.5%, 2/25/58 (144A) 566,618 511,128(d) Citigroup Mortgage Loan Trust, Inc., Series 2018-RP1, Class A1, 3.0%, 9/25/64 (144A) 516,215 500,000 COMM Mortgage Trust, Series 2012-CR2, Class AM, 3.791%, 8/15/45 513,907 337,284 COMM Mortgage Trust, Series 2014-UBS3, Class A3, 3.546%, 6/10/47 353,481 750,000 COMM Mortgage Trust, Series 2015-3BP, Class A, 3.178%, 2/10/35 (144A) 777,567 250,000(d) COMM Mortgage Trust, Series 2015-CR23, Class CMD, 3.685%, 5/10/48 (144A) 250,157 118,945(c) Connecticut Avenue Securities Trust, Series 2018-R07, Class 1M1, 3.016% (1 Month USD LIBOR + 75 bps), 4/25/31 (144A) 119,025 850,000(c) Connecticut Avenue Securities Trust, Series 2019-R02, Class 1M2, 4.566% (1 Month USD LIBOR + 230 bps), 8/25/31 (144A) 856,493 3,302 Credit Suisse First Boston Mortgage Securities Corp., Series 2005-C2, Class AMFX, 4.877%, 4/15/37 3,227 400,000(c) Credit Suisse Mortgage Capital Certificates, Series 2019-ICE4, Class E, 4.475% (1 Month USD LIBOR + 215 bps), 5/15/36 (144A) 402,502 100,000(d) CSAIL Commercial Mortgage Trust, Series 2015-C4, Class B, 4.331%, 11/15/48 106,249 500,000(d) CSAIL Commercial Mortgage Trust, Series 2016-C5, Class C, 4.536%, 11/15/48 530,479 772,953(d) CSMC Trust, Series 2019-RPL1, Class A1A, 3.65%, 7/25/58 (144A) 792,131 240,000(c) Eagle Re, Ltd., Series 2018-1, Class M1, 3.966% (1 Month USD LIBOR + 170 bps), 11/25/28 (144A) 239,726 350,000(c) Eagle Re, Ltd., Series 2019-1, Class M1B, 4.066% (1 Month USD LIBOR + 180 bps), 4/25/29 (144A) 349,185 253,819(d) EverBank Mortgage Loan Trust, Series 2013-2, Class A, 3.0%, 6/25/43 (144A) 254,023 340,000(c) Fannie Mae Connecticut Avenue Securities, Series 2018-C03, Class 1M2, 4.416% (1 Month USD LIBOR + 215 bps), 10/25/30 342,544 The accompanying notes are an integral part of these financial statements. Pioneer Balanced ESG Fund | Annual Report | 7/31/19 25 Schedule of Investments | 7/31/19 (continued) ----------------------------------------------------------------------------------------------------------------------- Principal Amount USD ($) Value ----------------------------------------------------------------------------------------------------------------------- COLLATERALIZED MORTGAGE OBLIGATIONS -- (continued) 88,141(c) Federal Home Loan Mortgage Corp. REMICS, Series 1671, Class S, 2.975% (1 Month USD LIBOR + 65 bps), 2/15/24 $ 89,455 781,427 Federal Home Loan Mortgage Corp. REMICS, Series 3816, Class HA, 3.5%, 11/15/25 811,899 33,019(c) Federal Home Loan Mortgage Corp. REMICS, Series 3868, Class FA, 2.725% (1 Month USD LIBOR + 40 bps), 5/15/41 32,639 5,251 Federal Home Loan Mortgage Corp. REMICS, Series 3909, Class UG, 2.5%, 8/15/25 5,246 251,070(c)(e) Federal Home Loan Mortgage Corp. REMICS, Series 4091, Class SH, 4.225% (1 Month USD LIBOR + 655 bps), 8/15/42 55,075 42,420(c) Federal National Mortgage Association REMICS, Series 2006-23, Class FP, 2.566% (1 Month USD LIBOR + 30 bps), 4/25/36 42,298 31,210(c) Federal National Mortgage Association REMICS, Series 2006-104, Class GF, 2.586% (1 Month USD LIBOR + 32 bps), 11/25/36 31,143 18,583(c) Federal National Mortgage Association REMICS, Series 2007-93, Class FD, 2.816% (1 Month USD LIBOR + 55 bps), 9/25/37 18,520 105,157(c) Federal National Mortgage Association REMICS, Series 2011-63, Class FG, 2.716% (1 Month USD LIBOR + 45 bps), 7/25/41 105,379 271,828(d) Flagstar Mortgage Trust, Series 2018-5, Class A7, 4.0%, 9/25/48 (144A) 275,657 350,000(c) Freddie Mac Stacr Trust, Series 2018-HQA2, Class M1, 3.016% (1 Month USD LIBOR + 75 bps), 10/25/48 (144A) 350,396 350,000(c) Freddie Mac Stacr Trust, Series 2019-DNA2, Class M2, 4.716% (1 Month USD LIBOR + 245 bps), 3/25/49 (144A) 354,051 190,000(c) Freddie Mac Stacr Trust, Series 2019-DNA3, Class M2, 4.35% (1 Month USD LIBOR + 205 bps), 7/25/49 (144A) 190,312 80,000(c) Freddie Mac Stacr Trust, Series 2019-HQA1, Class M2, 4.616% (1 Month USD LIBOR + 235 bps), 2/25/49 (144A) 80,795 310,000(c) Freddie Mac Structured Agency Credit Risk Debt Notes, Series 2017-DNA3, Class M2, 4.766% (1 Month USD LIBOR + 250 bps), 3/25/30 317,139 26,335(c) Government National Mortgage Association, Series 2000-36, Class FG, 2.772% (1 Month USD LIBOR + 50 bps), 11/20/30 26,337 1,808,103(d)(e) Government National Mortgage Association, Series 2017-21, Class IO, 0.795%, 10/16/58 127,364 290,000 GS Mortgage Securities Trust, Series 2015-GC28, Class A5, 3.396%, 2/10/48 302,831 The accompanying notes are an integral part of these financial statements. 26 Pioneer Balanced ESG Fund | Annual Report | 7/31/19 ----------------------------------------------------------------------------------------------------------------------- Principal Amount USD ($) Value ----------------------------------------------------------------------------------------------------------------------- COLLATERALIZED MORTGAGE OBLIGATIONS -- (continued) 150,000(c) Home Re, Ltd., Series 2018-1, Class M1, 3.866% (1 Month USD LIBOR + 160 bps), 10/25/28 (144A) $ 149,767 250,000(c) Home Re, Ltd., Series 2019-1, Class M1, 3.916% (1 Month USD LIBOR + 165 bps), 5/25/29 (144A) 250,284 375,000 JP Morgan Chase Commercial Mortgage Securities Trust, Series 2018-WPT, Class AFX, 4.248%, 7/5/33 (144A) 399,373 602,769(d) JP Morgan Mortgage Trust, Series 2017-2, Class A5, 3.5%, 5/25/47 (144A) 611,027 444,889(d) JP Morgan Mortgage Trust, Series 2017-4, Class A6, 3.0%, 11/25/48 (144A) 447,934 513,414(d) JP Morgan Mortgage Trust, Series 2018-9, Class A5, 4.0%, 2/25/49 (144A) 520,622 456,910(d) JP Morgan Mortgage Trust, Series 2019-1, Class A4, 4.0%, 5/25/49 (144A) 463,050 329,907(d) JP Morgan Mortgage Trust, Series 2019-2, Class A6, 4.0%, 8/25/49 (144A) 339,258 250,000 JPMDB Commercial Mortgage Securities Trust, Series, 2018-C8 Class A4, 4.211%, 6/15/51 277,193 2,450,000(d)(e) JPMDB Commercial Mortgage Securities Trust, Series 2018-C8, Class XB, 0.113%, 6/15/51 28,101 950,000(d) Mill City Mortgage Loan Trust, Series 2018-4, Class A1B, 3.5%, 4/25/66 (144A) 958,970 300,000 Morgan Stanley Capital I Trust, Series 2018-MP, Class A, 4.418%, 7/11/40 (144A) 335,628 500,000 New Residential Mortgage Loan Trust, Series 2019-RPL2, Class A1, 3.25%, 2/25/49 (144A) 506,705 265,000(c) NovaStar Mortgage Funding Trust, Series 2004-3, Class M4, 3.841% (1 Month USD LIBOR + 158 bps), 12/25/34 268,132 519,942(d) PMT Loan Trust, Series 2013-J1, Class A11, 3.5%, 9/25/43 (144A) 528,328 126,878(c) Radnor Re, Ltd., Series 2018-1, Class M1, 3.666% (1 Month USD LIBOR + 140 bps), 3/25/28 (144A) 127,184 300,000(c) Radnor Re, Ltd., Series 2019-1, Class M1B, 4.216% (1 Month USD LIBOR + 195 bps), 2/25/29 (144A) 300,407 542,342(d) Sequoia Mortgage Trust, Series 2013-8, Class A1, 3.0%, 6/25/43 543,064 823,221(d) Sequoia Mortgage Trust, Series 2015-3, Class A4, 3.5%, 7/25/45 (144A) 833,730 436,131(d) Sequoia Mortgage Trust, Series 2018-8, Class A4, 4.0%, 11/25/48 (144A) 441,992 280,000(c) STACR Trust, Series 2018-DNA3, Class M2, 4.366% (1 Month USD LIBOR + 210 bps), 9/25/48 (144A) 280,789 330,000(c) STACR Trust, Series 2018-HRP2, Class M3, 4.666% (1 Month USD LIBOR + 240 bps), 2/25/47 (144A) 338,314 750,000(d) Towd Point Mortgage Trust, Series 2015-4, Class A2, 3.75%, 4/25/55 (144A) 768,794 The accompanying notes are an integral part of these financial statements. Pioneer Balanced ESG Fund | Annual Report | 7/31/19 27 Schedule of Investments | 7/31/19 (continued) ----------------------------------------------------------------------------------------------------------------------- Principal Amount USD ($) Value ----------------------------------------------------------------------------------------------------------------------- COLLATERALIZED MORTGAGE OBLIGATIONS -- (continued) 750,000(d) Towd Point Mortgage Trust, Series 2015-5, Class M1, 3.5%, 5/25/55 (144A) $ 766,944 550,000(d) Towd Point Mortgage Trust, Series 2016-3, Class M1, 3.5%, 4/25/56 (144A) 566,083 1,100,000(d) Towd Point Mortgage Trust, Series 2017-6, Class A2, 3.0%, 10/25/57 (144A) 1,088,840 297,243(d) Towd Point Mortgage Trust, Series 2018-SJ1, Class A1, 4.0%, 10/25/58 (144A) 300,006 405,886(d) WinWater Mortgage Loan Trust, Series 2015-2, Class A5, 3.0%, 2/20/45 (144A) 411,297 ----------------------------------------------------------------------------------------------------------------------- TOTAL COLLATERALIZED MORTGAGE OBLIGATIONS (Cost $25,505,219) $ 26,046,614 ----------------------------------------------------------------------------------------------------------------------- CORPORATE BONDS -- 10.1% of Net Assets Aerospace & Defense -- 0.1% 355,000 Rockwell Collins, Inc., 3.2%, 3/15/24 $ 365,291 ------------ Total Aerospace & Defense $ 365,291 ----------------------------------------------------------------------------------------------------------------------- Airlines -- 0.1% 150,859 Air Canada 2017-1 Class AA Pass Through Trust, 3.3%, 1/15/30 (144A) $ 152,477 ------------ Total Airlines $ 152,477 ----------------------------------------------------------------------------------------------------------------------- Auto Manufacturers -- 0.1% 300,000 Ford Motor Credit Co. LLC, 5.584%, 3/18/24 $ 320,893 ------------ Total Auto Manufacturers $ 320,893 ----------------------------------------------------------------------------------------------------------------------- Banks -- 1.8% 200,000 ABN AMRO Bank NV, 4.8%, 4/18/26 (144A) $ 215,499 200,000(d) AIB Group Plc, 4.263% (3 Month USD LIBOR + 187 bps), 4/10/25 (144A) 205,506 475,000(b)(d) BNP Paribas SA, 6.625% (5 Year USD Swap Rate + 415 bps) (144A) 495,188 200,000 BPCE SA, 4.875%, 4/1/26 (144A) 216,166 200,000 Cooperatieve Rabobank UA, 3.875%, 2/8/22 207,148 250,000 Cooperatieve Rabobank UA, 3.95%, 11/9/22 259,198 465,000(b)(d) Credit Suisse Group AG, 7.125% (5 Year USD Swap Rate + 511 bps) 492,319 195,000(d) Goldman Sachs Group, Inc., 3.272% (3 Month USD LIBOR + 120 bps), 9/29/25 199,055 140,000(d) Goldman Sachs Group, Inc., 4.223% (3 Month USD LIBOR + 130 bps), 5/1/29 150,789 200,000 HSBC Holdings Plc, 4.875%, 1/14/22 210,612 951,000(b)(d) JPMorgan Chase & Co., 5.0% (SOFRRATE + 338 bps) 960,510 250,000 Morgan Stanley, 4.1%, 5/22/23 262,112 450,000 Nordea Bank Abp, 4.25%, 9/21/22 (144A) 468,111 The accompanying notes are an integral part of these financial statements. 28 Pioneer Balanced ESG Fund | Annual Report | 7/31/19 ----------------------------------------------------------------------------------------------------------------------- Principal Amount USD ($) Value ----------------------------------------------------------------------------------------------------------------------- Banks -- (continued) 650,000(b)(d) Societe Generale SA, 7.375% (5 Year USD Swap Rate + 624 bps) (144A) $ 676,812 240,000(b)(d) UBS Group Funding Switzerland AG, 7.0% (5 Year USD Swap Rate + 434 bps) (144A) 253,200 65,000(b)(d) UBS Group Funding Switzerland AG, 7.125% (5 Year USD Swap Rate + 588 bps) 67,838 ------------ Total Banks $ 5,340,063 ----------------------------------------------------------------------------------------------------------------------- Biotechnology -- 0.2% 102,000 Baxalta, Inc., 3.6%, 6/23/22 $ 104,225 350,000 Biogen, Inc., 5.2%, 9/15/45 399,532 ------------ Total Biotechnology $ 503,757 ----------------------------------------------------------------------------------------------------------------------- Building Materials -- 0.0%+ 110,000 Standard Industries, Inc., 5.5%, 2/15/23 (144A) $ 112,612 ------------ Total Building Materials $ 112,612 ----------------------------------------------------------------------------------------------------------------------- Chemicals -- 0.2% 200,000 Braskem Netherlands Finance BV, 4.5%, 1/10/28 $ 201,940 71,000 CF Industries, Inc., 5.375%, 3/15/44 66,740 140,000 Chemours Co., 7.0%, 5/15/25 137,321 84,000 Dow Chemical Co., 4.8%, 5/15/49 (144A) 89,213 10,000 NOVA Chemicals Corp., 4.875%, 6/1/24 (144A) 10,302 ------------ Total Chemicals $ 505,516 ----------------------------------------------------------------------------------------------------------------------- Commercial Services -- 0.1% 186,000 Verisk Analytics, Inc., 5.5%, 6/15/45 $ 219,321 ------------ Total Commercial Services $ 219,321 ----------------------------------------------------------------------------------------------------------------------- Computers -- 0.0%+ 80,000 NCR Corp., 6.375%, 12/15/23 $ 82,162 ------------ Total Computers $ 82,162 ----------------------------------------------------------------------------------------------------------------------- Diversified Financial Services -- 0.2% 300,000 Capital One Financial Corp., 3.75%, 4/24/24 $ 315,590 110,000 Capital One Financial Corp., 4.25%, 4/30/25 117,779 250,000 TD Ameritrade Holding Corp., 3.3%, 4/1/27 258,672 ------------ Total Diversified Financial Services $ 692,041 ----------------------------------------------------------------------------------------------------------------------- Electric -- 1.1% 220,000 Consolidated Edison Co. of New York, Inc., 4.625%, 12/1/54 $ 254,378 76,000(f) Dominion Energy, Inc., 3.071%, 8/15/24 76,669 250,000 Duke Energy Carolinas LLC, 3.95%, 3/15/48 270,940 230,000 Edison International, 2.95%, 3/15/23 227,473 The accompanying notes are an integral part of these financial statements. Pioneer Balanced ESG Fund | Annual Report | 7/31/19 29 Schedule of Investments | 7/31/19 (continued) ----------------------------------------------------------------------------------------------------------------------- Principal Amount USD ($) Value ----------------------------------------------------------------------------------------------------------------------- Electric -- (continued) 250,000(b)(d) Electricite de France SA, 5.25% (USD Swap Rate + 371 bps) (144A) $ 255,625 200,000(d) Enel S.p.A., 8.75% (5 Year USD Swap Rate + 588 bps), 9/24/73 (144A) 233,000 310,000 Iberdrola International BV, 6.75%, 7/15/36 418,667 365,000 NextEra Energy Capital Holdings, Inc., 3.55%, 5/1/27 382,669 18,605 OrCal Geothermal, Inc., 6.21%, 12/30/20 (144A) 18,633 250,000 PPL Capital Funding, Inc, 3.1%, 5/15/26 250,323 215,000 Sempra Energy, 3.4%, 2/1/28 217,929 185,000 Southern California Edison Co., 4.875%, 3/1/49 215,477 300,000 Southwestern Electric Power Co., 3.9%, 4/1/45 303,710 200,000 Virginia Electric & Power Co., 4.45%, 2/15/44 229,754 ------------ Total Electric $ 3,355,247 ----------------------------------------------------------------------------------------------------------------------- Electronics -- 0.2% 220,000 Amphenol Corp., 3.125%, 9/15/21 $ 222,685 81,000 Amphenol Corp., 3.2%, 4/1/24 83,160 113,000 Amphenol Corp., 4.35%, 6/1/29 124,120 250,000 Flex, Ltd., 4.75%, 6/15/25 264,451 40,000 Flex, Ltd., 4.875%, 6/15/29 41,528 ------------ Total Electronics $ 735,944 ----------------------------------------------------------------------------------------------------------------------- Energy-Alternate Sources -- 0.0%+ 55,201 Alta Wind Holdings LLC, 7.0%, 6/30/35 (144A) $ 62,163 ------------ Total Energy-Alternate Sources $ 62,163 ----------------------------------------------------------------------------------------------------------------------- Food -- 0.3% 265,000 Conagra Brands, Inc., 4.3%, 5/1/24 $ 281,417 116,000 JBS USA LUX SA/JBS USA Food Co./JBS USA Finance, Inc., 5.5%, 1/15/30 (144A) 116,000 300,000 Mondelez International Holdings Netherlands BV, 2.0%, 10/28/21 (144A) 296,937 50,000 Smithfield Foods, Inc., 2.65%, 10/3/21 (144A) 49,437 205,000 Smithfield Foods, Inc., 2.7%, 1/31/20 (144A) 204,511 ------------ Total Food $ 948,302 ----------------------------------------------------------------------------------------------------------------------- Forest Products & Paper -- 0.1% 250,000 International Paper Co., 6.0%, 11/15/41 $ 297,797 ------------ Total Forest Products & Paper $ 297,797 ----------------------------------------------------------------------------------------------------------------------- Gas -- 0.2% 325,000 Boston Gas Co., 3.15%, 8/1/27 (144A) $ 332,583 250,000 Southern California Gas Co., 5.125%, 11/15/40 299,706 ------------ Total Gas $ 632,289 ----------------------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 30 Pioneer Balanced ESG Fund | Annual Report | 7/31/19 ----------------------------------------------------------------------------------------------------------------------- Principal Amount USD ($) Value ----------------------------------------------------------------------------------------------------------------------- Healthcare-Products -- 0.1% 224,000 Abbott Laboratories, 3.75%, 11/30/26 $ 241,694 ------------ Total Healthcare-Products $ 241,694 ----------------------------------------------------------------------------------------------------------------------- Healthcare-Services -- 0.1% 350,000 UnitedHealth Group, Inc., 3.1%, 3/15/26 $ 361,680 ------------ Total Healthcare-Services $ 361,680 ----------------------------------------------------------------------------------------------------------------------- Home Builders -- 0.0%+ 83,000 Meritage Homes Corp., 6.0%, 6/1/25 $ 90,263 ------------ Total Home Builders $ 90,263 ----------------------------------------------------------------------------------------------------------------------- Household Products & Wares -- 0.1% 195,000 Church & Dwight Co., Inc., 2.45%, 8/1/22 $ 194,513 ------------ Total Household Products & Wares $ 194,513 ----------------------------------------------------------------------------------------------------------------------- Insurance -- 0.8% 250,000 AXA SA, 8.6%, 12/15/30 $ 359,132 42,000 CNO Financial Group, Inc., 5.25%, 5/30/25 45,255 23,000 CNO Financial Group, Inc., 5.25%, 5/30/29 24,840 50,000(d) Farmers Exchange Capital III, 5.454% (3 Month USD LIBOR + 345 bps), 10/15/54 (144A) 55,944 225,000(d) Farmers Insurance Exchange, 4.747% (3 Month USD LIBOR + 323 bps), 11/1/57 (144A) 222,750 155,000 Great-West Lifeco Finance 2018 LP, 4.581%, 5/17/48 (144A) 179,741 250,000 Nationwide Financial Services, Inc., 5.3%, 11/18/44 (144A) 287,491 215,000 New York Life Global Funding, 2.875%, 4/10/24 (144A) 218,872 220,000 Principal Financial Group, Inc., 3.3%, 9/15/22 223,601 215,000 Protective Life Corp., 4.3%, 9/30/28 (144A) 228,554 250,000 Prudential Financial, Inc., 3.878%, 3/27/28 272,847 110,000 Teachers Insurance & Annuity Association of America, 4.27%, 5/15/47 (144A) 120,778 110,000 Teachers Insurance & Annuity Association of America, 4.9%, 9/15/44 (144A) 130,014 20,000 Teachers Insurance & Annuity Association of America, 6.85%, 12/16/39 (144A) 28,534 ------------ Total Insurance $ 2,398,353 ----------------------------------------------------------------------------------------------------------------------- Internet -- 0.2% 285,000 Booking Holdings, Inc., 3.65%, 3/15/25 $ 299,647 275,000 Expedia Group, Inc., 5.0%, 2/15/26 302,246 ------------ Total Internet $ 601,893 ----------------------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Balanced ESG Fund | Annual Report | 7/31/19 31 Schedule of Investments | 7/31/19 (continued) ----------------------------------------------------------------------------------------------------------------------- Principal Amount USD ($) Value ----------------------------------------------------------------------------------------------------------------------- Media -- 0.1% 170,000 Comcast Corp., 4.15%, 10/15/28 $ 187,358 85,000 Sirius XM Radio, Inc., 5.375%, 7/15/26 (144A) 88,825 100,000 Videotron, Ltd., 5.375%, 6/15/24 (144A) 107,000 ------------ Total Media $ 383,183 ----------------------------------------------------------------------------------------------------------------------- Mining -- 0.2% 200,000 Anglo American Capital Plc, 4.875%, 5/14/25 (144A) $ 215,105 250,000 Corp Nacional del Cobre de Chile, 5.625%, 10/18/43 (144A) 315,283 ------------ Total Mining $ 530,388 ----------------------------------------------------------------------------------------------------------------------- Miscellaneous Manufacturers -- 0.0%+ 60,000 Amsted Industries, Inc., 5.375%, 9/15/24 (144A) $ 61,500 ------------ Total Miscellaneous Manufacturers $ 61,500 ----------------------------------------------------------------------------------------------------------------------- Oil & Gas -- 0.4% 25,000 Apache Corp., 4.25%, 1/15/30 $ 24,854 280,000 Apache Corp., 4.375%, 10/15/28 284,270 110,000 Newfield Exploration Co., 5.625%, 7/1/24 121,229 275,000 Noble Energy, Inc., 5.25%, 11/15/43 299,905 250,000 Sinopec Group Overseas Development 2014, Ltd., 4.375%, 4/10/24 (144A) 267,518 162,000 Valero Energy Corp., 6.625%, 6/15/37 207,194 ------------ Total Oil & Gas $ 1,204,970 ----------------------------------------------------------------------------------------------------------------------- Pharmaceuticals -- 0.7% 285,000 AbbVie, Inc., 4.875%, 11/14/48 $ 298,348 200,000 Bayer US Finance II LLC, 4.25%, 12/15/25 (144A) 209,959 310,000 Bristol-Myers Squibb Co., 2.9%, 7/26/24 (144A) 317,005 280,000 Cardinal Health, Inc., 3.079%, 6/15/24 280,179 135,000 Cigna Corp., 4.375%, 10/15/28 (144A) 146,416 114,335 CVS Pass-Through Trust, 5.298%, 1/11/27 (144A) 121,371 93,898 CVS Pass-Through Trust, 5.773%, 1/10/33 (144A) 105,136 74,385 CVS Pass-Through Trust, 8.353%, 7/10/31 (144A) 94,748 285,000 Perrigo Finance Unlimited Co., 3.9%, 12/15/24 283,843 200,000 Perrigo Finance Unlimited Co., 4.375%, 3/15/26 202,695 135,000 Teva Pharmaceutical Finance Netherlands III BV, 3.15%, 10/1/26 105,285 ------------ Total Pharmaceuticals $ 2,164,985 ----------------------------------------------------------------------------------------------------------------------- Pipelines -- 1.2% 280,000 Andeavor Logistics LP/Tesoro Logistics Finance Corp., 4.25%, 12/1/27 $ 293,842 135,000 Cheniere Energy Partners LP, 5.25%, 10/1/25 139,896 68,000 Enable Midstream Partners LP, 4.4%, 3/15/27 68,139 332,000 Enable Midstream Partners LP, 4.95%, 5/15/28 343,912 The accompanying notes are an integral part of these financial statements. 32 Pioneer Balanced ESG Fund | Annual Report | 7/31/19 ----------------------------------------------------------------------------------------------------------------------- Principal Amount USD ($) Value ----------------------------------------------------------------------------------------------------------------------- Pipelines -- (continued) 225,000 Enbridge, Inc., 3.7%, 7/15/27 $ 235,997 27,000 Energy Transfer Operating LP, 5.5%, 6/1/27 30,251 210,000 EnLink Midstream Partners LP, 5.45%, 6/1/47 179,025 345,000 Kinder Morgan, Inc., 5.05%, 2/15/46 375,679 105,000 MPLX LP, 4.875%, 12/1/24 114,423 55,000 MPLX LP, 4.875%, 6/1/25 59,906 400,000 Phillips 66 Partners LP, 3.75%, 3/1/28 410,552 290,000 Sabine Pass Liquefaction LLC, 5.0%, 3/15/27 316,108 176,000 Targa Resources Partners LP/Targa Resources Partners Finance Corp., 5.0%, 1/15/28 178,420 300,000 Texas Eastern Transmission LP, 3.5%, 1/15/28 (144A) 307,951 205,000 Williams Cos., Inc., 5.75%, 6/24/44 238,410 242,000 Williams Cos., Inc., 7.75%, 6/15/31 318,428 ------------ Total Pipelines $ 3,610,939 ----------------------------------------------------------------------------------------------------------------------- Real Estate -- 0.1% 250,000(b)(d) AT Securities BV, 5.25% (5 Year USD Swap Rate + 355 bps) $ 249,433 ------------ Total Real Estate $ 249,433 ----------------------------------------------------------------------------------------------------------------------- REITS -- 0.6% 50,000 Alexandria Real Estate Equities, Inc., 3.45%, 4/30/25 $ 51,496 100,000 Alexandria Real Estate Equities, Inc., 3.95%, 1/15/27 105,863 250,000 Boston Properties LP, 2.75%, 10/1/26 248,492 300,000 Duke Realty LP, 3.75%, 12/1/24 314,733 250,000 Essex Portfolio LP, 3.5%, 4/1/25 258,179 250,000 Highwoods Realty LP, 3.625%, 1/15/23 256,815 136,000 MPT Operating Partnership LP/MPT Finance Corp., 4.625%, 8/1/29 137,741 155,000 UDR, Inc., 4.0%, 10/1/25 164,214 140,000 UDR, Inc., 4.4%, 1/26/29 154,946 ------------ Total REITS $ 1,692,479 ----------------------------------------------------------------------------------------------------------------------- Retail -- 0.1% 270,000 Alimentation Couche-Tard, Inc., 3.55%, 7/26/27 (144A) $ 276,094 ------------ Total Retail $ 276,094 ----------------------------------------------------------------------------------------------------------------------- Software -- 0.1% 122,000 Fiserv, Inc., 3.8%, 10/1/23 $ 127,849 235,000 salesforce.com, Inc., 3.7%, 4/11/28 254,306 ------------ Total Software $ 382,155 ----------------------------------------------------------------------------------------------------------------------- Telecommunications -- 0.1% 110,000 CenturyLink, Inc., 5.8%, 3/15/22 $ 114,400 200,000 Deutsche Telekom International Finance BV, 1.95%, 9/19/21 (144A) 197,777 ------------ Total Telecommunications $ 312,177 ----------------------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Balanced ESG Fund | Annual Report | 7/31/19 33 Schedule of Investments | 7/31/19 (continued) ----------------------------------------------------------------------------------------------------------------------- Principal Amount USD ($) Value ----------------------------------------------------------------------------------------------------------------------- Transportation -- 0.4% 150,000 Burlington Northern Santa Fe LLC, 5.15%, 9/1/43 $ 185,285 250,000 FedEx Corp., 4.55%, 4/1/46 259,729 250,000 Norfolk Southern Corp., 2.9%, 6/15/26 254,688 370,000 Union Pacific Corp., 3.375%, 2/1/35 367,405 ------------ Total Transportation $ 1,067,107 ----------------------------------------------------------------------------------------------------------------------- Trucking & Leasing -- 0.1% 205,000 Penske Truck Leasing Co. LP/PTL Finance Corp., 3.375%, 2/1/22 (144A) $ 208,798 99,000 Penske Truck Leasing Co. LP/PTL Finance Corp., 4.2%, 4/1/27 (144A) 103,810 ------------ Total Trucking & Leasing $ 312,608 ----------------------------------------------------------------------------------------------------------------------- Water -- 0.0%+ 75,000 Aqua America, Inc., 3.566%, 5/1/29 $ 78,787 ------------ Total Water $ 78,787 ----------------------------------------------------------------------------------------------------------------------- TOTAL CORPORATE BONDS (Cost $29,054,125) $ 30,541,076 ----------------------------------------------------------------------------------------------------------------------- FOREIGN GOVERNMENT BOND -- 0.1% of Net Assets Mexico -- 0.1% 300,000 Mexico Government International Bond, 4.6%, 2/10/48 $ 303,378 ------------ Total Mexico $ 303,378 ----------------------------------------------------------------------------------------------------------------------- TOTAL FOREIGN GOVERNMENT BOND (Cost $276,262) $ 303,378 ----------------------------------------------------------------------------------------------------------------------- INSURANCE-LINKED SECURITIES -- 0.8% of Net Assets(g) Catastrophe Linked Bonds -- 0.7% Earthquakes -- California -- 0.1% 250,000(c) Ursa Re, 5.539% (3 Month U.S. Treasury Bill + 350 bps), 5/27/20 (144A) $ 247,775 ----------------------------------------------------------------------------------------------------------------------- Earthquakes -- U.S. -- 0.1% 250,000(c) Kilimanjaro Re, 5.796% (3 Month U.S. Treasury Bill + 375 bps), 11/25/19 (144A) $ 248,075 ----------------------------------------------------------------------------------------------------------------------- Multiperil -- U.S. -- 0.4% 250,000(c) Kilimanjaro Re, 8.796% (3 Month U.S. Treasury Bill + 675 bps), 12/6/19 (144A) $ 247,250 250,000(c) Kilimanjaro Re, 11.296% (3 Month U.S. Treasury Bill + 925 bps), 12/6/19 (144A) 245,625 250,000(c) Residential Reinsurance 2016, 6.014% (3 Month U.S. Treasury Bill + 397 bps), 12/6/20 (144A) 244,100 250,000(c) Residential Reinsurance 2017, 7.804% (3 Month U.S. Treasury Bill + 576 bps), 12/6/21 (144A) 244,275 The accompanying notes are an integral part of these financial statements. 34 Pioneer Balanced ESG Fund | Annual Report | 7/31/19 ----------------------------------------------------------------------------------------------------------------------- Principal Amount USD ($) Value ----------------------------------------------------------------------------------------------------------------------- Multiperil -- U.S. -- (continued) 250,000(c) Tailwind Re 2017-1, 9.014% (3 Month U.S. Treasury Bill + 697 bps), 1/8/22 (144A) $ 247,750 ------------ $ 1,229,000 ----------------------------------------------------------------------------------------------------------------------- Windstorm -- Texas -- 0.1% 250,000(c) Alamo Re, 5.537% (1 Month U.S. Treasury Bill + 348 bps), 6/7/21 (144A) $ 244,425 ------------ Total Catastrophe Linked Bonds $ 1,969,275 ----------------------------------------------------------------------------------------------------------------------- ----------------------------------------------------------------------------------------------------------------------- Face Amount USD ($) Value ----------------------------------------------------------------------------------------------------------------------- Collateralized Reinsurance -- 0.0%+ Multiperil -- Worldwide -- 0.0%+ 250,000+(a)(h) Resilience Re, 4/6/20 $ 2,000 250,000+(a)(h) Resilience Re, 4/6/20 25 ------------ Total Collateralized Reinsurance $ 2,025 ----------------------------------------------------------------------------------------------------------------------- Reinsurance Sidecars -- 0.1% Multiperil -- U.S. -- 0.0%+ 125,001+(a)(h) Sector Re V, Series 7, Class G, 3/1/22 (144A) $ 89,800 ----------------------------------------------------------------------------------------------------------------------- Multiperil -- Worldwide -- 0.1% 250,000+(a)(h) Bantry Re 2016, 3/30/20 $ 20,150 100,000+(a)(i) Lorenz Re 2017, 3/31/20 1,710 100,000+(a)(i) Lorenz Re 2018, 7/1/21 20,610 250,000+(a)(h) Sector Re V, Series 9, Class A, 3/1/24 (144A) 259,933 ------------ $ 302,403 ------------ Total Reinsurance Sidecars $ 392,203 ----------------------------------------------------------------------------------------------------------------------- TOTAL INSURANCE-LINKED SECURITIES (Cost $2,365,570) $ 2,363,503 ----------------------------------------------------------------------------------------------------------------------- ----------------------------------------------------------------------------------------------------------------------- Principal Amount USD ($) ----------------------------------------------------------------------------------------------------------------------- MUNICIPAL BONDS -- 0.2% of Net Assets(j) Municipal Education -- 0.1% 100,000 Massachusetts Development Finance Agency, Phillips Academy, Series B, 4.844%, 9/1/43 $ 121,470 ------------ Total Municipal Education $ 121,470 ----------------------------------------------------------------------------------------------------------------------- Municipal General -- 0.0%+ 100,000(k) Central Texas Regional Mobility Authority, 1/1/25 $ 90,278 ------------ Total Municipal General $ 90,278 ----------------------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Balanced ESG Fund | Annual Report | 7/31/19 35 Schedule of Investments | 7/31/19 (continued) ----------------------------------------------------------------------------------------------------------------------- Principal Amount USD ($) Value ----------------------------------------------------------------------------------------------------------------------- Municipal Higher Education -- 0.1% 200,000 University of California, Series AG, 4.062%, 5/15/33 $ 208,174 ------------ Total Municipal Higher Education $ 208,174 ----------------------------------------------------------------------------------------------------------------------- Municipal Medical -- 0.0%+ 100,000 Health & Educational Facilities Authority of the State of Missouri, Washington University, Series A, 3.685%, 2/15/47 $ 107,894 ------------ Total Municipal Medical $ 107,894 ----------------------------------------------------------------------------------------------------------------------- TOTAL MUNICIPAL BONDS (Cost $475,128) $ 527,816 ----------------------------------------------------------------------------------------------------------------------- SENIOR SECURED FLOATING RATE LOAN INTERESTS -- 0.9% of Net Assets*(c) Beverage, Food & Tobacco -- 0.1% 210,923 Darling Ingredients, Inc. (fka Darling International, Inc.), Term B Loan, 4.24% (LIBOR + 200 bps), 12/18/24 $ 211,582 ------------ Total Beverage, Food & Tobacco $ 211,582 ----------------------------------------------------------------------------------------------------------------------- Broadcasting & Entertainment -- 0.1% 199,096 Sinclair Television Group, Inc., Tranche B Term Loan, 4.49% (LIBOR + 225 bps), 1/3/24 $ 199,220 ------------ Total Broadcasting & Entertainment $ 199,220 ----------------------------------------------------------------------------------------------------------------------- Chemicals, Plastics & Rubber -- 0.0%+ 128,375 Axalta Coating Systems Dutch Holding B BV (Axalta Coating Systems US Holdings, Inc.), Term B-3 Dollar Loan, 4.08% (LIBOR + 175 bps), 6/1/24 $ 128,006 ------------ Total Chemicals, Plastics & Rubber $ 128,006 ----------------------------------------------------------------------------------------------------------------------- Computers & Electronics -- 0.1% 172,813 Iron Mountain Information Management LLC, Incremental Term B Loan, 3.984% (LIBOR + 175 bps), 1/2/26 $ 170,432 100,606 Microchip Technology, Inc., Initial Term Loan, 4.24% (LIBOR + 200 bps), 5/29/25 100,763 ------------ Total Computers & Electronics $ 271,195 ----------------------------------------------------------------------------------------------------------------------- Diversified & Conglomerate Service -- 0.1% 128,363 Constellis Holdings LLC, First Lien Term B Loan, 7.256% (LIBOR + 500 bps), 4/21/24 $ 99,481 86,410 NVA Holdings, Inc., First Lien Term B-3 Loan, 4.984% (LIBOR + 275 bps), 2/2/25 86,427 123,426 Tempo Acquisition LLC, Initial Term Loan, 5.234% (LIBOR + 300 bps), 5/1/24 123,773 96,525 West Corp., Incremental Term B-1 Loan, 6.022% (LIBOR + 350 bps), 10/10/24 89,406 ------------ Total Diversified & Conglomerate Service $ 399,087 ----------------------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 36 Pioneer Balanced ESG Fund | Annual Report | 7/31/19 ----------------------------------------------------------------------------------------------------------------------- Principal Amount USD ($) Value ----------------------------------------------------------------------------------------------------------------------- Environmental Services -- 0.1% 173,298 GFL Environmental, Inc., Effective Date Incremental Term Loan, 5.234% (LIBOR + 300 bps), 5/30/25 $ 172,251 ------------ Total Environmental Services $ 172,251 ----------------------------------------------------------------------------------------------------------------------- Insurance -- 0.1% 80,250 Asurion LLC (fka Asurion Corp.), New B-7 Term Loan, 5.234% (LIBOR + 300 bps), 11/3/24 $ 80,539 98,744 USI, Inc. (fka Compass Investors, Inc.), 2017 New Term Loan, 5.33% (LIBOR + 300 bps), 5/16/24 97,551 ------------ Total Insurance $ 178,090 ----------------------------------------------------------------------------------------------------------------------- Leasing -- 0.1% 110,681 Avolon TLB Borrower 1 (US) LLC, Term B-3 Loan, 4.022% (LIBOR + 175 bps), 1/15/25 $ 111,087 133,313 IBC Capital I, Ltd. (aka Goodpack, Ltd.), First Lien Tranche B-1 Term Loan, 6.152% (LIBOR + 375 bps), 9/11/23 133,368 6,204 Kasima LLC (Digital Cinema Implementation Partners LLC), Term Loan, 7.0% (PRIME + 150 bps), 5/17/21 6,212 ------------ Total Leasing $ 250,667 ----------------------------------------------------------------------------------------------------------------------- Oil & Gas -- 0.0%+ 134,940 Apergy Corp., Initial Term Loan, 4.75% (LIBOR + 250 bps), 5/9/25 $ 135,699 ------------ Total Oil & Gas $ 135,699 ----------------------------------------------------------------------------------------------------------------------- Professional & Business Services -- 0.1% 173,250 SIWF Holdings, Inc., (aka Spring Window Fashions), First Lien Initial Term Loan, 6.52% (LIBOR + 425 bps), 6/15/25 $ 172,925 ------------ Total Professional & Business Services $ 172,925 ----------------------------------------------------------------------------------------------------------------------- Telecommunications -- 0.1% 129,605 CenturyLink, Inc., Initial Term B Loan, 4.984% (LIBOR + 275 bps), 1/31/25 $ 128,941 128,700 SBA Senior Finance II LLC, Initial Term Loan, 4.24% (LIBOR + 200 bps), 4/11/25 128,566 86,395 Sprint Communications, Inc., Initial Term Loan, 4.75% (LIBOR + 250 bps), 2/2/24 86,251 ------------ Total Telecommunications $ 343,758 ----------------------------------------------------------------------------------------------------------------------- Utilities -- 0.0%+ 118,233 Vistra Operations Co. LLC (fka Tex Operations Co. LLC), Initial Term Loan, 4.234% (LIBOR + 200 bps), 8/4/23 $ 118,553 ------------ Total Utilities $ 118,553 ----------------------------------------------------------------------------------------------------------------------- TOTAL SENIOR SECURED FLOATING RATE LOAN INTERESTS (Cost $2,618,460) $ 2,581,033 ----------------------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Balanced ESG Fund | Annual Report | 7/31/19 37 Schedule of Investments | 7/31/19 (continued) ----------------------------------------------------------------------------------------------------------------------- Principal Amount USD ($) Value ----------------------------------------------------------------------------------------------------------------------- U.S. GOVERNMENT AND AGENCY OBLIGATIONS -- 11.7% of Net Assets 41,930 Fannie Mae, 2.5%, 3/1/43 $ 41,594 30,541 Fannie Mae, 2.5%, 4/1/43 30,297 14,359 Fannie Mae, 2.5%, 8/1/43 14,244 26,260 Fannie Mae, 2.5%, 4/1/45 25,944 36,429 Fannie Mae, 2.5%, 4/1/45 35,990 34,518 Fannie Mae, 2.5%, 8/1/45 34,103 74,429 Fannie Mae, 3.0%, 10/1/30 75,992 153,594 Fannie Mae, 3.0%, 5/1/31 157,008 19,646 Fannie Mae, 3.0%, 2/1/43 20,020 184,694 Fannie Mae, 3.0%, 6/1/45 187,774 9,349 Fannie Mae, 3.0%, 5/1/46 9,434 17,066 Fannie Mae, 3.0%, 5/1/46 17,330 83,498 Fannie Mae, 3.0%, 5/1/46 84,982 8,582 Fannie Mae, 3.0%, 10/1/46 8,661 5,316 Fannie Mae, 3.0%, 1/1/47 5,365 22,625 Fannie Mae, 3.0%, 4/1/48 23,026 33,517 Fannie Mae, 3.0%, 7/1/49 34,059 43,534 Fannie Mae, 3.0%, 7/1/49 44,306 273,000 Fannie Mae, 3.0%, 8/1/49 (TBA) 275,330 944,682 Fannie Mae, 3.5%, 7/1/43 984,218 524,518 Fannie Mae, 3.5%, 9/1/44 545,121 263,715 Fannie Mae, 3.5%, 1/1/47 272,943 399,357 Fannie Mae, 3.5%, 6/1/49 414,695 2,928,000 Fannie Mae, 3.5%, 8/1/49 (TBA) 2,999,141 152,221 Fannie Mae, 4.0%, 10/1/40 162,523 331,400 Fannie Mae, 4.0%, 3/1/41 351,313 87,490 Fannie Mae, 4.0%, 5/1/42 92,747 384,798 Fannie Mae, 4.0%, 6/1/42 409,446 151,758 Fannie Mae, 4.0%, 9/1/42 160,894 356,379 Fannie Mae, 4.0%, 7/1/43 368,858 143,801 Fannie Mae, 4.0%, 8/1/43 152,501 214,323 Fannie Mae, 4.0%, 8/1/43 226,451 189,070 Fannie Mae, 4.0%, 7/1/44 199,292 231,840 Fannie Mae, 4.0%, 9/1/44 244,303 71,553 Fannie Mae, 4.0%, 4/1/47 75,253 21,998 Fannie Mae, 4.0%, 6/1/47 23,093 38,044 Fannie Mae, 4.0%, 6/1/47 39,946 1,295,506 Fannie Mae, 4.0%, 3/1/48 1,351,568 400,000 Fannie Mae, 4.0%, 8/1/49 (TBA) 413,927 4,553 Fannie Mae, 4.5%, 11/1/20 4,673 335,771 Fannie Mae, 4.5%, 6/1/40 362,323 234,970 Fannie Mae, 4.5%, 4/1/41 253,418 The accompanying notes are an integral part of these financial statements. 38 Pioneer Balanced ESG Fund | Annual Report | 7/31/19 ----------------------------------------------------------------------------------------------------------------------- Principal Amount USD ($) Value ----------------------------------------------------------------------------------------------------------------------- U.S. GOVERNMENT AND AGENCY OBLIGATIONS -- (continued) 264,690 Fannie Mae, 4.5%, 12/1/43 $ 283,485 149,446 Fannie Mae, 4.5%, 1/1/49 156,720 700,000 Fannie Mae, 4.5%, 8/1/49 (TBA) 733,906 966,000 Fannie Mae, 4.5%, 8/1/49 (TBA) 1,013,093 152,357 Fannie Mae, 5.0%, 5/1/31 161,910 17,773 Fannie Mae, 5.5%, 3/1/23 18,387 6,034 Fannie Mae, 5.5%, 3/1/34 6,461 9,180 Fannie Mae, 5.5%, 12/1/34 10,199 58,998 Fannie Mae, 5.5%, 10/1/35 65,676 23,124 Fannie Mae, 5.5%, 12/1/35 25,856 26,420 Fannie Mae, 5.5%, 12/1/35 29,545 18,912 Fannie Mae, 5.5%, 5/1/37 21,167 103,246 Fannie Mae, 5.5%, 5/1/38 113,884 657 Fannie Mae, 6.0%, 9/1/29 734 1,881 Fannie Mae, 6.0%, 8/1/32 2,140 17,593 Fannie Mae, 6.0%, 12/1/33 19,652 9,798 Fannie Mae, 6.0%, 10/1/37 11,035 6,497 Fannie Mae, 6.0%, 12/1/37 7,372 13,079 Fannie Mae, 6.5%, 4/1/29 14,482 3,794 Fannie Mae, 6.5%, 7/1/29 4,208 18,404 Fannie Mae, 6.5%, 5/1/32 21,219 14,854 Fannie Mae, 6.5%, 9/1/32 17,012 7,914 Fannie Mae, 6.5%, 10/1/32 8,781 10,156 Fannie Mae, 7.0%, 1/1/36 11,484 61,307 Federal Home Loan Mortgage Corp., 3.0%, 2/1/43 62,511 118,842 Federal Home Loan Mortgage Corp., 3.0%, 4/1/43 121,177 63,807 Federal Home Loan Mortgage Corp., 3.0%, 5/1/43 65,061 134,659 Federal Home Loan Mortgage Corp., 3.0%, 6/1/46 136,763 16,755 Federal Home Loan Mortgage Corp., 3.0%, 10/1/46 17,064 34,741 Federal Home Loan Mortgage Corp., 3.0%, 12/1/46 35,276 10,304 Federal Home Loan Mortgage Corp., 3.0%, 11/1/47 10,478 87,103 Federal Home Loan Mortgage Corp., 3.5%, 3/1/26 89,979 134,009 Federal Home Loan Mortgage Corp., 3.5%, 11/1/28 139,565 260,445 Federal Home Loan Mortgage Corp., 3.5%, 3/1/42 271,577 382,591 Federal Home Loan Mortgage Corp., 3.5%, 7/1/44 398,395 51,940 Federal Home Loan Mortgage Corp., 3.5%, 8/1/44 54,052 95,276 Federal Home Loan Mortgage Corp., 3.5%, 3/1/46 98,294 217,265 Federal Home Loan Mortgage Corp., 3.5%, 8/1/46 226,219 236,495 Federal Home Loan Mortgage Corp., 3.5%, 8/1/46 245,585 258,801 Federal Home Loan Mortgage Corp., 3.5%, 8/1/46 269,855 19,506 Federal Home Loan Mortgage Corp., 3.5%, 6/1/47 20,226 240,057 Federal Home Loan Mortgage Corp., 4.0%, 2/1/40 254,688 The accompanying notes are an integral part of these financial statements. Pioneer Balanced ESG Fund | Annual Report | 7/31/19 39 Schedule of Investments | 7/31/19 (continued) ----------------------------------------------------------------------------------------------------------------------- Principal Amount USD ($) Value ----------------------------------------------------------------------------------------------------------------------- U.S. GOVERNMENT AND AGENCY OBLIGATIONS -- (continued) 420,709 Federal Home Loan Mortgage Corp., 4.0%, 11/1/40 $ 446,216 451,269 Federal Home Loan Mortgage Corp., 4.0%, 11/1/40 478,669 268,314 Federal Home Loan Mortgage Corp., 4.0%, 1/1/41 284,617 171,245 Federal Home Loan Mortgage Corp., 4.0%, 7/1/44 180,656 177,037 Federal Home Loan Mortgage Corp., 4.0%, 9/1/44 186,717 501,873 Federal Home Loan Mortgage Corp., 4.0%, 10/1/44 529,314 182,927 Federal Home Loan Mortgage Corp., 4.0%, 11/1/44 192,875 47,326 Federal Home Loan Mortgage Corp., 4.0%, 4/1/47 49,758 79,882 Federal Home Loan Mortgage Corp., 4.0%, 4/1/47 83,955 165,404 Federal Home Loan Mortgage Corp., 4.0%, 4/1/47 173,948 37,247 Federal Home Loan Mortgage Corp., 4.5%, 8/1/34 40,190 155,259 Federal Home Loan Mortgage Corp., 4.5%, 5/1/40 167,653 81,208 Federal Home Loan Mortgage Corp., 4.5%, 7/1/40 87,694 159,262 Federal Home Loan Mortgage Corp., 4.5%, 5/1/41 171,984 29,293 Federal Home Loan Mortgage Corp., 5.0%, 11/1/34 32,205 26,811 Federal Home Loan Mortgage Corp., 5.0%, 8/1/37 29,285 6,187 Federal Home Loan Mortgage Corp., 5.0%, 5/1/39 6,743 13,592 Federal Home Loan Mortgage Corp., 5.0%, 12/1/39 14,840 16,841 Federal Home Loan Mortgage Corp., 5.5%, 11/1/34 18,867 11,290 Federal Home Loan Mortgage Corp., 6.0%, 1/1/38 12,833 17,835 Federal Home Loan Mortgage Corp., 6.0%, 10/1/38 20,280 7,621 Federal Home Loan Mortgage Corp., 6.5%, 10/1/33 8,795 72,207 Federal Home Loan Mortgage Corp., 7.0%, 10/1/46 74,266 175,790 Government National Mortgage Association I, 3.5%, 11/15/41 182,889 32,166 Government National Mortgage Association I, 3.5%, 10/15/42 33,526 363,259 Government National Mortgage Association I, 4.0%, 9/15/41 385,785 71,744 Government National Mortgage Association I, 4.0%, 4/15/45 76,167 107,783 Government National Mortgage Association I, 4.0%, 6/15/45 114,441 56,129 Government National Mortgage Association I, 4.5%, 5/15/39 60,636 10,303 Government National Mortgage Association I, 5.5%, 8/15/33 11,640 13,497 Government National Mortgage Association I, 5.5%, 9/15/33 14,488 11,795 Government National Mortgage Association I, 6.0%, 10/15/33 13,153 10,077 Government National Mortgage Association I, 6.0%, 9/15/34 11,064 66,167 Government National Mortgage Association I, 6.0%, 9/15/38 75,843 The accompanying notes are an integral part of these financial statements. 40 Pioneer Balanced ESG Fund | Annual Report | 7/31/19 ----------------------------------------------------------------------------------------------------------------------- Principal Amount USD ($) Value ----------------------------------------------------------------------------------------------------------------------- U.S. GOVERNMENT AND AGENCY OBLIGATIONS -- (continued) 10,322 Government National Mortgage Association I, 6.5%, 10/15/28 $ 11,363 25,782 Government National Mortgage Association I, 6.5%, 5/15/31 28,382 19,247 Government National Mortgage Association I, 6.5%, 6/15/32 22,285 18,552 Government National Mortgage Association I, 6.5%, 12/15/32 21,540 21,942 Government National Mortgage Association I, 6.5%, 5/15/33 24,155 292 Government National Mortgage Association I, 7.0%, 8/15/28 325 2,778 Government National Mortgage Association I, 8.0%, 2/15/30 2,784 700,000 Government National Mortgage Association II, 4.0%, 8/1/49 (TBA) 727,043 98,926 Government National Mortgage Association II, 4.5%, 9/20/44 103,092 35,580 Government National Mortgage Association II, 4.5%, 10/20/44 37,700 74,571 Government National Mortgage Association II, 4.5%, 11/20/44 79,001 1,760,000 Government National Mortgage Association II, 4.5%, 8/1/49 (TBA) 1,832,875 23,812 Government National Mortgage Association II, 5.5%, 2/20/34 26,404 38,039 Government National Mortgage Association II, 6.5%, 11/20/28 43,137 1,757 Government National Mortgage Association II, 7.5%, 9/20/29 2,019 1,368,000 U.S. Treasury Bonds, 3.0%, 2/15/49 1,501,434 456,183 U.S. Treasury Inflation Indexed Bonds, 0.875%, 2/15/47 471,089 2,112,984 U.S. Treasury Inflation Indexed Bonds, 1.0%, 2/15/46 2,242,378 1,318,908 U.S. Treasury Inflation Indexed Bonds, 1.0%, 2/15/48 1,406,421 966,825 U.S. Treasury Inflation Indexed Bonds, 1.0%, 2/15/49 1,037,708 430,000 U.S. Treasury Notes, 2.25%, 4/30/24 437,743 2,775,000 U.S. Treasury Notes, 2.375%, 2/29/24 2,839,389 1,568,000 U.S. Treasury Notes, 2.625%, 2/15/29 1,649,769 ----------------------------------------------------------------------------------------------------------------------- TOTAL U.S. GOVERNMENT AND AGENCY OBLIGATIONS (Cost $34,707,315) $ 35,329,307 ----------------------------------------------------------------------------------------------------------------------- TOTAL INVESTMENTS IN UNAFFILIATED ISSUERS -- 96.3% (Cost $246,057,868) $290,804,759 ----------------------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Balanced ESG Fund | Annual Report | 7/31/19 41 Schedule of Investments | 7/31/19 (continued) ----------------------------------------------------------------------------------------------------------------------- Net Change in Net Realized Unrealized Dividend Gain Appreciation Shares Income (Loss) (Depreciation) Value ----------------------------------------------------------------------------------------------------------------------- AFFILIATED ISSUER -- 0.3% CLOSED-END FUND -- 0.3% of Net Assets 110,371 Pioneer ILS Interval Fund(l) $61,168 $ -- $(119,201) $ 962,435 ----------------------------------------------------------------------------------------------------------------------- TOTAL CLOSED-END FUND (Cost $1,123,856) $ 962,435 ----------------------------------------------------------------------------------------------------------------------- TOTAL INVESTMENTS IN AFFILIATED ISSUER -- 0.3% (Cost $1,123,856) $ 962,435 ----------------------------------------------------------------------------------------------------------------------- OTHER ASSETS AND LIABILITIES -- 3.4% $ 10,343,689 ----------------------------------------------------------------------------------------------------------------------- NET ASSETS -- 100.0% $302,110,883 ======================================================================================================================= (A.D.R.) American Depositary Receipts. bps Basis Points. ICE Intercontinental Exchange. LIBOR London Interbank Offered Rate. PRIME U.S. Federal Funds Rate. REIT Real Estate Investment Trust. REMICS Real Estate Mortgage Investment Conduits. (TBA) "To Be Announced" Securities. (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 July 31, 2019, the value of these securities amounted to $34,202,599, or 11.3% of net assets. + 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 July 31, 2019. + Security that used significant unobservable inputs to determine its value. (a) Non-income producing security. (b) Security is perpetual in nature and has no stated maturity date. (c) Floating rate note. Coupon rate, reference index and spread shown at July 31, 2019. (d) The interest rate is subject to change periodically. The interest rate and/or reference index and spread is shown at July 31, 2019. (e) Security represents the interest-only portion payments on a pool of underlying mortgages or mortgage-backed securities. (f) Debt obligation initially issued at one coupon which converts to a higher coupon at a specific date. The rate shown is the rate at July 31, 2019. (g) Securities are restricted as to resale. The accompanying notes are an integral part of these financial statements. 42 Pioneer Balanced ESG Fund | Annual Report | 7/31/19 (h) Issued as participation notes. (i) Issued as preference shares. (j) Consists of Revenue Bonds unless otherwise indicated. (k) Security issued with a zero coupon. Income is recognized through accretion of discount. (l) Pioneer ILS Interval Fund is an affiliated closed-end fund managed by Amundi Pioneer Asset Management, Inc. FUTURES CONTRACTS FIXED INCOME INTEREST FUTURES CONTRACTS -------------------------------------------------------------------------------------- Number of Contracts Expiration Notional Market Unrealized Long Description Date Amount Value Appreciation -------------------------------------------------------------------------------------- 54 U.S. 2 Year Note (CBT) 9/30/19 $11,546,398 $11,577,937 $31,539 2 U.S. 10 Year Note (CBT) 9/19/19 253,781 254,844 1,063 18 U.S. Ultra Bond (CBT) 9/19/19 3,139,945 3,196,125 56,180 -------------------------------------------------------------------------------------- $14,940,124 $15,028,906 $88,782 ====================================================================================== ------------------------------------------------------------------------------------------- Number of Contracts Expiration Notional Market Unrealized Short Description Date Amount Value (Depreciation) ------------------------------------------------------------------------------------------- 9 U.S. 5 Year Note (CBT) 9/30/19 $1,052,508 $1,057,992 $ (5,484) 30 U.S. 10 Year Ultra 9/19/19 4,067,344 4,135,313 (67,969) 4 U.S. Long Bond (CBT) 9/19/19 609,398 622,375 (12,977) ------------------------------------------------------------------------------------------- $5,729,250 $5,815,680 $(86,430) ------------------------------------------------------------------------------------------- TOTAL FUTURES CONTRACTS $9,210,874 $9,213,226 $ 2,352 =========================================================================================== Purchases and sales of securities (excluding temporary cash investments) for the year ended July 31, 2019 were as follows: --------------------------------------------------------------------------------------- Purchases Sales --------------------------------------------------------------------------------------- Long-Term U.S. Government Securities $ 10,644,241 $ 19,405,433 Other Long-Term Securities $150,987,371 $148,844,168 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 effected at current market prices. During the year ended July 31, 2019, the Fund did not engage in any cross trade activity. At July 31, 2019, the net unrealized appreciation on investments based on cost for federal tax purposes of $247,055,970 was as follows: Aggregate gross unrealized appreciation for all investments in which there is an excess of value over tax cost $50,349,326 Aggregate gross unrealized depreciation for all investments in which there is an excess of tax cost over value (5,635,750) ----------- Net unrealized appreciation $44,713,576 =========== The accompanying notes are an integral part of these financial statements. Pioneer Balanced ESG Fund | Annual Report | 7/31/19 43 Schedule of Investments | 7/31/19 (continued) 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). See Notes to Financial Statements -- Note 1A. The following is a summary of the inputs used as of July 31, 2019, in valuing the Fund's investments: -------------------------------------------------------------------------------------------------------- Level 1 Level 2 Level 3 Total -------------------------------------------------------------------------------------------------------- Common Stocks $189,182,335 $ -- $ -- $189,182,335 Convertible Preferred Stock 412,475 -- -- 412,475 Asset Backed Securities -- 3,517,222 -- 3,517,222 Collateralized Mortgage Obligations -- 26,046,614 -- 26,046,614 Corporate Bonds -- 30,541,076 -- 30,541,076 Foreign Government Bond -- 303,378 -- 303,378 Insurance-Linked Securities Collateralized Reinsurance Multiperil - Worldwide -- -- 2,025 2,025 Reinsurance Sidecars Multiperil - U.S. -- -- 89,800 89,800 Multiperil - Worldwide -- -- 302,403 302,403 All Other Insurance-Linked Securities -- 1,969,275 -- 1,969,275 Municipal Bonds -- 527,816 -- 527,816 Senior Secured Floating Rate Loan Interests -- 2,581,033 -- 2,581,033 U.S. Government and Agency Obligations -- 35,329,307 -- 35,329,307 Affiliated Closed-End Fund -- 962,435 -- 962,435 -------------------------------------------------------------------------------------------------------- Total Investments in Securities $189,594,810 $101,778,156 $394,228 $291,767,194 ======================================================================================================== Other Financial Instruments Net unrealized appreciation on futures contracts $ 2,352 $ -- $ -- $ 2,352 -------------------------------------------------------------------------------------------------------- Total Other Financial Instruments $ 2,352 $ -- $ -- $ 2,352 ======================================================================================================== The accompanying notes are an integral part of these financial statements. 44 Pioneer Balanced ESG Fund | Annual Report | 7/31/19 The following is a reconciliation of assets valued using significant unobservable inputs (Level 3): --------------------------------------------------------------------------------- Insurance- Linked Securities --------------------------------------------------------------------------------- Balance as of 7/31/18 $ 698,646(a) Realized gain (loss)(1) 11,253 Changed in unrealized appreciation (depreciation)(2) 51,494 Accrued discounts/premiums -- Purchases 585,195 Sales (952,360) Transfers in to Level 3* -- Transfers out of Level 3* -- --------------------------------------------------------------------------------- Balance as of 7/31/19 $ 394,228 ================================================================================= (a) Securities were classified as Corporate Bonds on the July 31, 2018 financial statements. (1) Realized gain (loss) on these securities is included in the realized gain (loss) in investments in the Statement of Operations. (2) Unrealized appreciation (depreciation) on these securities is included in the change in unrealized appreciation (depreciation) from investments in the Statement of Operations. * Transfers are calculated on the beginning of period value. For the year ended July 31, 2019, there were no transfers between Levels 1, 2 and 3. Net change in unrealized appreciation (depreciation) of Level 3 investments still held and considered Level 3 at July 31, 2019: $65,941 ------- The accompanying notes are an integral part of these financial statements. Pioneer Balanced ESG Fund | Annual Report | 7/31/19 45 Statement of Assets and Liabilities | 7/31/19 ASSETS: Investments in unaffiliated issuers, at value (cost $246,057,868) $290,804,759 Investments in affiliated issuers, at value (cost $1,123,856) 962,435 Cash 17,879,854 Foreign currencies, at value (cost $813) 827 Futures collateral 103,663 Due from broker for futures 35,160 Variation margin for futures contracts 7,109 Net unrealized appreciation on futures contracts 2,352 Receivables -- Investment securities sold 1,236,176 Fund shares sold 404,975 Dividends 204,733 Interest 566,025 Due from the Adviser 77,404 Other assets 33,829 -------------------------------------------------------------------------------------------- Total assets $312,319,301 ============================================================================================ LIABILITIES: Payables -- Investment securities purchased $ 9,888,292 Fund shares repurchased 70,371 Distributions 4,147 Due to affiliates 84,659 Accrued expenses 160,949 -------------------------------------------------------------------------------------------- Total liabilities $ 10,208,418 ============================================================================================ NET ASSETS: Paid-in capital $250,523,133 Distributable earnings 51,587,750 -------------------------------------------------------------------------------------------- Net assets $302,110,883 ============================================================================================ NET ASSET VALUE PER SHARE: No par value (unlimited number of shares authorized) Class A (based on $219,544,365/22,937,591 shares) $ 9.57 Class C (based on $46,993,046/4,948,395 shares) $ 9.50 Class K (based on $280,872/29,373 shares) $ 9.56 Class R (based on $1,362,773/142,106 shares) $ 9.59 Class Y (based on $33,929,827/3,518,725 shares) $ 9.64 MAXIMUM OFFERING PRICE PER SHARE: Class A (based on $9.57 net asset value per share/100%-4.5% maximum sales charge) $ 10.02 ============================================================================================ The accompanying notes are an integral part of these financial statements. 46 Pioneer Balanced ESG Fund | Annual Report | 7/31/19 Statement of Operations For the Year Ended 7/31/19 INVESTMENT INCOME: Interest from unaffiliated issuers $ 3,836,683 Dividends from unaffiliated issuers (net of foreign taxes withheld $31,820) 4,251,136 Dividends from affiliated issuers 61,168 ------------------------------------------------------------------------------------------------------------ Total investment income $ 8,148,987 ============================================================================================================ EXPENSES: Management fees $ 1,437,381 Administrative expense 164,127 Transfer agent fees Class A 164,951 Class C 27,868 Class K 98 Class R 5,624 Class Y 37,078 Distribution fees Class A 491,725 Class C 444,797 Class R 6,998 Shareowner communications expense 68,114 Custodian fees 45,741 Registration fees 101,897 Professional fees 67,534 Printing expense 46,059 Pricing fees 46,161 Trustees' fees 8,252 Insurance expense 3,435 Miscellaneous 30,715 ------------------------------------------------------------------------------------------------------------ Total expenses $ 3,198,555 Less fees waived and expenses reimbursed by the Adviser (202,213) ------------------------------------------------------------------------------------------------------------ Net expenses $ 2,996,342 ------------------------------------------------------------------------------------------------------------ Net investment income $ 5,152,645 ------------------------------------------------------------------------------------------------------------ REALIZED AND UNREALIZED GAIN (LOSS) ON INVESTMENTS: Net realized gain (loss) on: Investments in unaffiliated issuers $10,856,116 Futures contracts (30,305) $10,825,811 ------------------------------------------------------------------------------------------------------------ Change in net unrealized appreciation (depreciation) on: Investments in unaffiliated issuers $ 7,128,353 Investments in affiliated issuers (119,201) Futures contracts (7,315) Unfunded loan commitments (24) Other assets and liabilities denominated in foreign currencies (13) $ 7,001,800 ------------------------------------------------------------------------------------------------------------ Net realized and unrealized gain (loss) on investments $17,827,611 ------------------------------------------------------------------------------------------------------------ Net increase in net assets resulting from operations $22,980,256 ============================================================================================================ The accompanying notes are an integral part of these financial statements. Pioneer Balanced ESG Fund | Annual Report | 7/31/19 47 Statements of Changes in Net Assets -------------------------------------------------------------------------------------------------- Year Ended Year Ended 7/31/19 7/31/18 -------------------------------------------------------------------------------------------------- FROM OPERATIONS: Net investment income (loss) $ 5,152,645 $ 4,599,743 Net realized gain (loss) on investments 10,825,811 23,517,780 Change in net unrealized appreciation (depreciation) on investments 7,001,800 (3,250,087) -------------------------------------------------------------------------------------------------- Net increase in net assets resulting from operations $ 22,980,256 $ 24,867,436 -------------------------------------------------------------------------------------------------- DISTRIBUTIONS TO SHAREOWNERS:* Class A ($0.81 and $0.88 per share, respectively) $(16,496,598) $(15,947,658) Class C ($0.73 and $0.81 per share, respectively) (3,437,961) (3,937,826) Class K ($0.82 and $0.92 per share, respectively) (10,782) (10,276) Class R ($0.76 and $0.86 per share, respectively) (137,339) (722,557) Class Y ($0.83 and $0.91 per share, respectively) (2,742,457) (3,339,320) -------------------------------------------------------------------------------------------------- Total distributions to shareowners $(22,825,137) $(23,957,637) -------------------------------------------------------------------------------------------------- FROM FUND SHARE TRANSACTIONS: Net proceeds from sales of shares $ 73,859,993 $ 46,583,833 Reinvestment of distributions 21,987,127 22,643,164 Cost of shares repurchased (65,420,314) (89,485,183) -------------------------------------------------------------------------------------------------- Net increase (decrease) in net assets resulting from Fund share transactions $ 30,426,806 $(20,258,186) -------------------------------------------------------------------------------------------------- Net increase (decrease) in net assets $ 30,581,925 $(19,348,387) NET ASSETS:** Beginning of year $271,528,958 $290,877,345 -------------------------------------------------------------------------------------------------- End of year $302,110,883 $271,528,958 ================================================================================================== * For the year ended July 31, 2018, distributions to shareowners were presented as follows: Net investment income: Class A ($0.17 per share) $ (3,270,990) Class C ($0.10 per share) (522,660) Class K ($0.21 per share) (2,351) Class R ($0.15 per share) (183,495) Class Y ($0.20 per share) (710,974) Net realized gain: Class A ($0.71 per share) $(12,676,668) Class C ($0.71 per share) (3,415,166) Class K ($0.71 per share) (7,925) Class R ($0.71 per share) (539,062) Class Y ($0.71 per share) (2,628,346) **For the year ended July 31, 2018, undistributed net investment income was presented as follows: $654,000. The accompanying notes are an integral part of these financial statements. 48 Pioneer Balanced ESG Fund | Annual Report | 7/31/19 ---------------------------------------------------------------------------------------------------- Year Ended Year Ended Year Ended Year Ended 7/31/19 7/31/19 7/31/18 7/31/18 Shares Amount Shares Amount ---------------------------------------------------------------------------------------------------- Class A Shares sold 5,321,203 $ 48,879,014 2,639,707 $ 25,386,552 Reinvestment of distributions 1,815,993 16,015,138 1,627,839 15,365,828 Less shares repurchased (3,423,746) (31,194,374) (3,684,312) (35,544,558) ---------------------------------------------------------------------------------------------------- Net increase 3,713,450 $ 33,699,778 583,234 $ 5,207,822 ==================================================================================================== Class C Shares sold 1,505,440 $ 13,593,944 1,073,243 $ 10,226,676 Reinvestment of distributions 373,234 3,250,825 391,643 3,661,793 Less shares repurchased (2,073,001) (18,911,238) (1,176,794) (11,208,590) ---------------------------------------------------------------------------------------------------- Net increase (decrease) (194,327) $ (2,066,469) 288,092 $ 2,679,879 ==================================================================================================== Class K Shares sold 20,887 $ 179,574 11,222 $ 106,951 Reinvestment of distributions 142 1,309 -- -- Less shares repurchased (2,878) (26,335) (11,222) (106,948) ---------------------------------------------------------------------------------------------------- Net increase 18,151 $ 154,548 -- $ 3 ==================================================================================================== Class R Shares sold 134,601 $ 1,200,761 195,463 $ 1,897,313 Reinvestment of distributions 5,629 49,679 47,457 450,170 Less shares repurchased (614,312) (5,738,686) (2,482,300) (24,488,599) ---------------------------------------------------------------------------------------------------- Net decrease (474,082) $ (4,488,246) (2,239,380) $(22,141,116) ==================================================================================================== Class Y Shares sold 1,086,813 $ 10,006,700 933,900 $ 8,966,341 Reinvestment of distributions 300,695 2,670,176 333,095 3,165,373 Less shares repurchased (1,051,188) (9,549,681) (1,879,083) (18,136,488) ---------------------------------------------------------------------------------------------------- Net increase (decrease) 336,320 $ 3,127,195 (612,088) $ (6,004,774) ==================================================================================================== The accompanying notes are an integral part of these financial statements. Pioneer Balanced ESG Fund | Annual Report | 7/31/19 49 Financial Highlights ------------------------------------------------------------------------------------------------------------------------------------ Year Year Year Year Year Ended Ended Ended Ended Ended 7/31/19 7/31/18 7/31/17 7/31/16* 7/31/15* ------------------------------------------------------------------------------------------------------------------------------------ Class A Net asset value, beginning of period $ 9.64 $ 9.65 $ 9.07 $ 9.36 $ 9.76 ------------------------------------------------------------------------------------------------------------------------------------ Increase (decrease) from investment operations: Net investment income (loss) $ 0.18(a) $ 0.17(a) $ 0.17(a) $ 0.16(a) $ 0.18 Net realized and unrealized gain (loss) on investments 0.56 0.70 0.62 (0.09) 0.46 ------------------------------------------------------------------------------------------------------------------------------------ Net increase (decrease) from investment operations $ 0.74 $ 0.87 $ 0.79 $ 0.07 $ 0.64 ------------------------------------------------------------------------------------------------------------------------------------ Distributions to shareowners: Net investment income $ (0.18) $ (0.17) $ (0.17) $ (0.18) $ (0.18) Net realized gain (0.63) (0.71) (0.04) (0.18) (0.86) ------------------------------------------------------------------------------------------------------------------------------------ Total distributions $ (0.81) $ (0.88) $ (0.21) $ (0.36) $ (1.04) ------------------------------------------------------------------------------------------------------------------------------------ Net increase (decrease) in net asset value $ (0.07) $ (0.01) $ 0.58 $ (0.29) $ (0.40) ------------------------------------------------------------------------------------------------------------------------------------ Net asset value, end of period $ 9.57 $ 9.64 $ 9.65 $ 9.07 $ 9.36 ==================================================================================================================================== Total return (b) 8.51% 9.33% 8.94%(c) 0.88% 6.82% Ratio of net expenses to average net assets 1.01% 1.16% 1.16% 1.16% 1.16% Ratio of net investment income (loss) to average net assets 1.97% 1.76% 1.87% 1.87% 1.89% Portfolio turnover rate 60% 65% 51% 47% 44% Net assets, end of period (in thousands) $219,544 $185,382 $179,867 $178,013 $179,691 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Total expenses to average net assets 1.07% 1.17% 1.19% 1.22% 1.23% Net investment income (loss) to average net assets 1.91% 1.75% 1.84% 1.81% 1.82% ==================================================================================================================================== * 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 and no sales charges. Total return would be reduced if sales charges were taken into account. (c) If the Fund had not recognized gains in settlement of class action lawsuits during the year ended July 31, 2017, the total return would have been 8.83%. The accompanying notes are an integral part of these financial statements. 50 Pioneer Balanced ESG Fund | Annual Report | 7/31/19 ------------------------------------------------------------------------------------------------------------------------------------ Year Year Year Year Year Ended Ended Ended Ended Ended 7/31/19 7/31/18 7/31/17 7/31/16* 7/31/15* ------------------------------------------------------------------------------------------------------------------------------------ Class C Net asset value, beginning of period $ 9.57 $ 9.58 $ 9.00 $ 9.30 $ 9.70 ------------------------------------------------------------------------------------------------------------------------------------ Increase (decrease) from investment operations: Net investment income (loss) $ 0.11(a) $ 0.10(a) $ 0.10(a) $ 0.10(a) $ 0.11 Net realized and unrealized gain (loss) on investments 0.55 0.70 0.62 (0.11) 0.47 ------------------------------------------------------------------------------------------------------------------------------------ Net increase (decrease) from investment operations $ 0.66 $ 0.80 $ 0.72 $ (0.01) $ 0.58 ------------------------------------------------------------------------------------------------------------------------------------ Distributions to shareowners: Net investment income $ (0.10) $ (0.10) $ (0.10) $ (0.11) $ (0.12) Net realized gain (0.63) (0.71) (0.04) (0.18) (0.86) ------------------------------------------------------------------------------------------------------------------------------------ Total distributions $ (0.73) $ (0.81) $ (0.14) $ (0.29) $ (0.98) ------------------------------------------------------------------------------------------------------------------------------------ Net increase (decrease) in net asset value $ (0.07) $ (0.01) $ 0.58 $ (0.30) $ (0.40) ------------------------------------------------------------------------------------------------------------------------------------ Net asset value, end of period $ 9.50 $ 9.57 $ 9.58 $ 9.00 $ 9.30 ==================================================================================================================================== Total return (b) 7.68% 8.63% 8.10% 0.04% 6.14%(c) Ratio of net expenses to average net assets 1.75% 1.90% 1.91% 1.93% 1.93% Ratio of net investment income (loss) to average net assets 1.23% 1.03% 1.12% 1.10% 1.10% Portfolio turnover rate 60% 65% 51% 47% 44% Net assets, end of period (in thousands) $46,993 $49,205 $46,520 $48,385 $40,470 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Total expenses to average net assets 1.79% 1.90% 1.91% 1.93% 1.93% Net investment income (loss) to average net assets 1.19% 1.03% 1.12% 1.10% 1.10% ==================================================================================================================================== * 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 and no sales charges. Total return would be reduced if sales charges were taken into account. (c) If the Fund had not recognized gains in settlement of class action lawsuits during the year ended July 31, 2015, the total return would have been 6.03%. The accompanying notes are an integral part of these financial statements. Pioneer Balanced ESG Fund | Annual Report | 7/31/19 51 Financial Highlights (continued) --------------------------------------------------------------------------------------------------------------------- Year Year Year Ended Ended Ended 12/1/15 to 7/31/19 7/31/18 7/31/17 7/31/16* --------------------------------------------------------------------------------------------------------------------- Class K Net asset value, beginning of period $ 9.63 $ 9.65 $ 9.06 $ 9.01 --------------------------------------------------------------------------------------------------------------------- Increase (decrease) from investment operations: Net investment income (loss) (a) $ 0.20 $ 0.20 $ 0.20 $ 0.12 Net realized and unrealized gain (loss) on investments 0.55 0.70 0.63 0.08 --------------------------------------------------------------------------------------------------------------------- Net increase (decrease) from investment operations $ 0.75 $ 0.90 $ 0.83 $ 0.20 --------------------------------------------------------------------------------------------------------------------- Distributions to shareowners: Net investment income $(0.19) $(0.21) $(0.20) $(0.14) Net realized gain (0.63) (0.71) (0.04) (0.01) --------------------------------------------------------------------------------------------------------------------- Total distributions $(0.82) $(0.92) $(0.24) $(0.15) --------------------------------------------------------------------------------------------------------------------- Net increase (decrease) in net asset value $(0.07) $(0.02) $ 0.59 $ 0.05 --------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $ 9.56 $ 9.63 $ 9.65 $ 9.06 ===================================================================================================================== Total return (b) 8.72% 9.66% 9.36%(c) 2.29%(d) Ratio of net expenses to average net assets 0.76% 0.85% 0.85% 0.98%(e) Ratio of net investment income (loss) to average net assets 2.21% 2.07% 2.19% 2.00%(e) Portfolio turnover rate 60% 65% 51% 47%(d) Net assets, end of period (in thousands) $ 281 $ 108 $ 108 $ 10 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Total expenses to average net assets 0.81% 0.85% 0.85% 0.98%(e) Net investment income (loss) to average net assets 2.16% 2.07% 2.19% 2.00%(e) ===================================================================================================================== * 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) If the Fund had not recognized gains in settlement of class action lawsuits during the year ended July 31, 2017, the total return would have been 9.25%. (d) Not annualized. (e) Annualized. The accompanying notes are an integral part of these financial statements. 52 Pioneer Balanced ESG Fund | Annual Report | 7/31/19 ------------------------------------------------------------------------------------------------------------------------------------ Year Year Year Year Ended Ended Ended Ended 7/1/15 to 7/31/19 7/31/18 7/31/17 7/31/16* 7/31/15* ------------------------------------------------------------------------------------------------------------------------------------ Class R Net asset value, beginning of period $ 9.64 $ 9.64 $ 9.06 $ 9.36 $9.27 ------------------------------------------------------------------------------------------------------------------------------------ Increase (decrease) from investment operations: Net investment income (loss) $ 0.15(a) $ 0.15(a) $ 0.15(a) $ 0.15(a) $0.00(b) Net realized and unrealized gain (loss) on investments 0.56 0.71 0.63 (0.10) 0.09 ------------------------------------------------------------------------------------------------------------------------------------ Net increase (decrease) from investment operations $ 0.71 $ 0.86 $ 0.78 $ 0.05 $0.09 ------------------------------------------------------------------------------------------------------------------------------------ Distributions to shareowners: Net investment income $(0.13) $(0.15) $ (0.16) $(0.17) $ -- Net realized gain (0.63) (0.71) (0.04) (0.18) -- ------------------------------------------------------------------------------------------------------------------------------------ Total distributions $(0.76) $(0.86) $ (0.20) $(0.35) $ -- ------------------------------------------------------------------------------------------------------------------------------------ Net increase (decrease) in net asset value $(0.05) $ -- $ 0.58 $(0.30) $0.09 ------------------------------------------------------------------------------------------------------------------------------------ Net asset value, end of period $ 9.59 $ 9.64 $ 9.64 $ 9.06 $9.36 ==================================================================================================================================== Total return (c) 8.24% 9.17% 8.78% 0.67% 0.97%(d) Ratio of net expenses to average net assets 1.30% 1.30% 1.30% 1.30% 1.30%(e) Ratio of net investment income (loss) to average net assets 1.65% 1.56% 1.64% 1.73% 2.73%(e) Portfolio turnover rate 60% 65% 51% 47% 44%(d) Net assets, end of period (in thousands) $1,363 $5,941 $27,533 $3,277 $ 139 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Total expenses to average net assets 1.77% 1.57% 1.56% 1.53% 1.67%(e) Net investment income (loss) to average net assets 1.18% 1.29% 1.38% 1.50% 2.36%(e) ==================================================================================================================================== * 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) Amount rounds to less than $0.01 or $(0.01) per share. (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 Balanced ESG Fund | Annual Report | 7/31/19 53 Financial Highlights (continued) ------------------------------------------------------------------------------------------------------------------------------------ Year Year Year Year Year Ended Ended Ended Ended Ended 7/31/19 7/31/18 7/31/17 7/31/16* 7/31/15* ------------------------------------------------------------------------------------------------------------------------------------ Class Y Net asset value, beginning of period $ 9.71 $ 9.71 $ 9.11 $ 9.41 $ 9.79 ------------------------------------------------------------------------------------------------------------------------------------ Increase (decrease) from investment operations: Net investment income (loss) $ 0.21(a) $ 0.19(a) $ 0.20(a) $ 0.18(a) $ 0.20 Net realized and unrealized gain (loss) on investments 0.55 0.72 0.63 (0.11) 0.48 ------------------------------------------------------------------------------------------------------------------------------------ Net increase (decrease) from investment operations $ 0.76 $ 0.91 $ 0.83 $ 0.07 $ 0.68 ------------------------------------------------------------------------------------------------------------------------------------ Distributions to shareowners: Net investment income $ (0.20) $ (0.20) $ (0.19) $ (0.19) $ (0.20) Net realized gain (0.63) (0.71) (0.04) (0.18) (0.86) ------------------------------------------------------------------------------------------------------------------------------------ Total distributions $ (0.83) $ (0.91) $ (0.23) $ (0.37) $ (1.06) ------------------------------------------------------------------------------------------------------------------------------------ Net increase (decrease) in net asset value $ (0.07) $ -- $ 0.60 $ (0.30) $ (0.38) ------------------------------------------------------------------------------------------------------------------------------------ Net asset value, end of period $ 9.64 $ 9.71 $ 9.71 $ 9.11 $ 9.41 ==================================================================================================================================== Total return (b) 8.77% 9.67% 9.26% 0.95% 7.17% Ratio of net expenses to average net assets 0.69% 0.93% 0.95% 0.95% 0.93% Ratio of net investment income (loss) to average net assets 2.29% 1.99% 2.13% 2.08% 2.10% Portfolio turnover rate 60% 65% 51% 47% 44% Net assets, end of period (in thousands) $33,930 $30,892 $36,849 $61,801 $69,014 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Total expenses to average net assets 0.84% 0.93% 0.95% 0.95% 0.93% Net investment income (loss) to average net assets 2.14% 1.99% 2.13% 2.08% 2.10% ==================================================================================================================================== * 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. The accompanying notes are an integral part of these financial statements. 54 Pioneer Balanced ESG Fund | Annual Report | 7/31/19 Notes to Financial Statements | 7/31/19 1. Organization and Significant Accounting Policies Pioneer Balanced ESG Fund (the "Fund") is one of two portfolios comprising Pioneer Series Trust IV, a Delaware statutory trust. The Fund is registered under the Investment Company Act of 1940 as a diversified, open-end management investment company. The Fund's investment objective is to seek capital growth and current income through a diversified portfolio of equity securities and bonds. The Fund offers five classes of shares designated as Class A, Class C, Class K, Class R and Class Y shares. Each class of shares represents an interest in the same portfolio of investments of the Fund and has identical rights (based on relative net asset values) to assets and liquidation proceeds. Share classes can bear different rates of class-specific fees and expenses, such as transfer agent and distribution fees. Differences in class-specific fees and expenses will result in differences in net investment income and, therefore, the payment of different dividends from net investment income earned by each class. The Amended and Restated Declaration of Trust of the Fund gives the Board of Trustees the flexibility to specify either per-share voting or dollar-weighted voting when submitting matters for 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 K and Class Y shares. Amundi Pioneer Asset Management, Inc., an indirect, wholly owned subsidiary of Amundi and Amundi's wholly owned subsidiary, Amundi USA, Inc., serves as the Fund's investment adviser (the "Adviser"). Amundi Pioneer Distributor, Inc., an affiliate of Amundi Pioneer Asset Management, Inc., serves as the Fund's distributor (the "Distributor"). In August 2018, the Securities and Exchange Commission ("SEC") released a Disclosure Update and Simplification Final Rule. The Final Rule amends Regulation S-X disclosures requirements to conform them to U.S. Generally Accepted Accounting Principles ("U.S. GAAP") for investment companies. The Fund's financial statements were prepared in compliance with the new amendments to Regulation S-X. The Fund is an investment company and follows investment company accounting and reporting guidance under U.S. GAAP. U.S. GAAP requires the management of the Fund to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets Pioneer Balanced ESG Fund | Annual Report | 7/31/19 55 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 following is a summary of significant accounting policies followed by the Fund in the preparation of its financial statements: A. Security Valuation The net asset value of the Fund is computed once daily, on each day the New York Stock Exchange ("NYSE") is open, as of the close of regular trading on the NYSE. Equity securities that have traded on an exchange are valued by using the last sale price on the principal exchange where they are traded. Equity securities that have not traded on the date of valuation, or securities for which sale prices are not available, generally are valued using the mean between the last bid and asked prices or, if both last bid and asked prices are not available, at the last quoted bid price. Last sale and bid and asked prices are provided by independent third party pricing services. In the case of equity securities not traded on an exchange, prices are typically determined by independent third party pricing services using a variety of techniques and methods. The 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 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 56 Pioneer Balanced ESG Fund | Annual Report | 7/31/19 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. Futures contracts are generally valued at the closing settlement price established by the exchange on which they are traded. Shares of open-end registered investment companies (including money market mutual funds) are valued at such funds' net asset value. Shares of exchange-listed closed-end funds are valued by using the last sale price on the principal exchange where they are traded. Shares of closed-end interval funds that offer their shares at net asset value are valued at such funds' net asset value. 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. Pioneer Balanced ESG Fund | Annual Report | 7/31/19 57 At July 31, 2019, 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. 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. 58 Pioneer Balanced ESG Fund | Annual Report | 7/31/19 D. 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 July 31, 2019, 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. At July 31, 2019, the Fund reclassified $7,872 to increase distributable earnings and $7,872 to decrease paid-in capital to reflect permanent book/tax differences. These adjustments have no impact on net assets or the results of operations. The tax character of distributions paid during the years ended July 31, 2019 and July 31, 2018, were as follows: -------------------------------------------------------------------------- 2019 2018 -------------------------------------------------------------------------- Distributions paid from: Ordinary income $ 4,996,893 $10,217,981 Long-term capital gain 17,828,244 13,739,656 -------------------------------------------------------------------------- Total $22,825,137 $23,957,637 ========================================================================== The following shows the components of distributable earnings on a federal income tax basis at July 31, 2019: -------------------------------------------------------------------------- 2019 -------------------------------------------------------------------------- Distributable earnings: Undistributed ordinary income $ 468,353 Undistributed long-term capital gain 6,405,807 Net unrealized appreciation 44,713,590 -------------------------------------------------------------------------- Total $51,587,750 ========================================================================== Pioneer Balanced ESG Fund | Annual Report | 7/31/19 59 The difference between book-basis and tax-basis net unrealized appreciation is attributable to the tax deferral of losses on wash sales, adjustments relating to catastrophe bonds, the tax treatment of premium and amortization, the mark to market of futures contracts, tax basis adjustments on Real Estate Investment Trust ("REIT") holdings and common stock. E. Fund Shares The Fund records sales and repurchases of its shares as of trade date. The Distributor earned $31,812 in underwriting commissions on the sale of Class A shares during the year ended July 31, 2019. F. Class Allocations Income, common expenses and realized and unrealized gains and losses are calculated at the fund level and allocated daily to each class of shares based on its respective percentage of adjusted net assets at the beginning of the day. Distribution fees are calculated based on the average daily net asset value attributable to Class A, Class C and Class R shares of the Fund, respectively (see Note 4). Class K and Class Y shares do not pay distribution fees. All expenses and fees paid to the Fund's transfer agent for its services are allocated among the classes of shares based on the number of accounts in each class and the ratable allocation of related out-of-pocket expenses (see Note 3). Distributions to shareowners are recorded as of the ex-dividend date. Distributions paid by the Fund with respect to each class of shares are calculated in the same manner and at the same time, except that net investment income dividends to Class A, Class C, Class K, Class R and Class Y shares can reflect different transfer agent and distribution expense rates. G. Risks 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. 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. 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 60 Pioneer Balanced ESG Fund | Annual Report | 7/31/19 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 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 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. The Fund's prospectus contains unaudited information regarding the Fund's principal risks. Please refer to that document when considering the Fund's principal risks. Pioneer Balanced ESG Fund | Annual Report | 7/31/19 61 H. Insurance-Linked Securities ("ILS") The Fund invests in ILS. The Fund could lose a portion or all of the principal it has invested in an ILS, and the right to additional interest or dividend payments with respect to the security, upon the occurrence of one or more trigger events, as defined within the terms of an insurance-linked security. Trigger events, generally, are hurricanes, earthquakes, or other natural events of a specific size or magnitude that occur in a designated geographic region during a specified time period, and/or that involve losses or other metrics that exceed a specific amount. There is no way to accurately predict whether a trigger event will occur, and accordingly, ILS carry significant risk. The Fund is entitled to receive principal, and interest and/or dividend payments so long as no trigger event occurs of the description and magnitude specified by the instrument. In addition to the specified trigger events, ILS 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 event-linked bonds. ILS also 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. Where the ILS 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. Additionally, the Fund may gain exposure to 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 July 31, 2019, is listed in the Schedule of Investments. 62 Pioneer Balanced ESG Fund | Annual Report | 7/31/19 I. 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 July 31, 2019, 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 reduced 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 market value of futures contracts open during the year ended July 31, 2019, was $6,291,298. Open futures contracts outstanding at July 31, 2019, are listed in the Schedule of Investments. 2. Management Agreement The Adviser manages the Fund's portfolio. Effective October 1, 2018, management fees are calculated daily at the annual rate of 0.50% of the Fund's average daily net assets up to $1 billion and 0.45% of the Fund's average daily net assets over $1 billion. The fee is accrued daily and paid monthly. Prior to October 1, 2018, the management fee was calculated daily at the annual rate of 0.65% of the Fund's average daily net assets up to $1 billion, 0.60% of the next $4 billion and 0.55% of the Fund's average daily net assets over $5 billion. For the year ended July 31, 2019, the effective management fee (excluding waivers and/or assumption of expenses) was equivalent to 0.52% of the Fund's average daily net assets. Pioneer Balanced ESG Fund | Annual Report | 7/31/19 63 The Adviser has agreed to waive its management fee with respect to any portion of the Fund's assets invested in Pioneer ILS Interval Fund, an affiliated fund managed by the Adviser. For the year ended July 31, 2019, the Adviser waived $17,549 in management fees with respect to the Fund, which is reflected on the Statement of Operations as a expense waiver. Effective October 1, 2018, the Adviser 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 0.99%, 0.90%, 1.30% and 0.65% of the average daily net assets attributable to Class A, Class K, Class R and Class Y shares, respectively. These expense limitations are in effect through December 1, 2019. Prior to October 1, 2018, the Adviser contractually agreed to limit ordinary operating expenses to the extent required to reduce Fund expenses to 1.16%, 0.90% and 1.30% of the average daily net assets attributable to Class A, Class K and Class R shares, respectively. Fees waived and expenses reimbursed during the year ended July 31, 2019 are reflected on the Statement of Operations. 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 $70,500 in management fees, administrative costs and certain other reimbursements payable to the Adviser at July 31, 2019. 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, and outgoing phone calls. For the year ended July 31, 2019, such out-of-pocket expenses by class of shares were as follows: 64 Pioneer Balanced ESG Fund | Annual Report | 7/31/19 -------------------------------------------------------------------------------- Shareowner Communications: -------------------------------------------------------------------------------- Class A $55,398 Class C 7,949 Class K 90 Class R 2,215 Class Y 2,462 -------------------------------------------------------------------------------- Total $68,114 ================================================================================ 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, Class C and Class R shares. Pursuant to the Plan, the Fund pays the Distributor 0.25% of the average daily net assets attributable to Class A shares as compensation for personal services and/or account maintenance services or distribution services with regard to Class A shares. Pursuant to the Plan, the Fund also pays the Distributor 1.00% of the average daily net assets attributable to Class C shares. The fee for Class C shares consists of a 0.25% service fee and a 0.75% distribution fee paid as compensation for personal services and/or account maintenance services or distribution services with regard to Class C shares. Pursuant to the Plan, the Fund further pays the Distributor 0.50% of the average daily net assets attributable to Class R shares for distribution services. Included in "Due to affiliates" reflected on the Statement of Assets and Liabilities is $14,159 in distribution fees payable to the Distributor at July 31, 2019. The Fund also has adopted a separate service plan for Class R shares ("Service Plan"). The Service Plan authorizes the Fund to pay securities dealers, plan administrators or other service organizations that agree to provide certain services to retirement plans or plan participants holding shares of the Fund a service fee of up to 0.25% of the Fund's average daily net assets attributable to Class R shares held by such plans. In addition, redemptions of Class A and Class C 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 K, Class R or Class Y shares. Proceeds from the CDSC are paid to the Distributor. For the year ended July 31, 2019, CDSCs in the amount of $3,192 were paid to the Distributor. Pioneer Balanced ESG Fund | Annual Report | 7/31/19 65 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 facility is in the amount of $25 million. Under such facility, depending on the type of loan, interest on borrowings is payable at the London Interbank Offered Rate ("LIBOR") plus 0.90% on an annualized basis, or the Alternate Base Rate, which is the greater of (a) the facility's administrative agent's daily announced prime rate on the borrowing date, (b) 2% plus the Federal Funds Rate on the borrowing date or (c) 2% plus the overnight Eurodollar rate on the borrowing date. The Funds pay an annual commitment fee to participate in a credit facility. The commitment fee is allocated among participating Funds based on an allocation schedule set forth in the credit agreement. For the year ended July 31, 2019, the Fund had no borrowings under the credit facility. 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. 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. 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. 66 Pioneer Balanced ESG Fund | Annual Report | 7/31/19 The fair value of open derivative instruments (not considered to be hedging instruments for accounting disclosure purposes) by risk exposure at July 31, 2019, was as follows: ----------------------------------------------------------------------------------------- Interest Foreign Statement of Rate Credit Exchange Equity Commodity Assets and Liabilities Risk Risk Rate Risk Risk Risk ----------------------------------------------------------------------------------------- Assets Net unrealized appreciation on futures contracts $2,352 $ -- $ -- $ -- $ -- ----------------------------------------------------------------------------------------- Total Value $2,352 $ -- $ -- $ -- $ -- ========================================================================================= The effect of derivative instruments (not considered to be hedging instruments for accounting disclosure purposes) on the Statement of Operations by risk exposure at July 31, 2019, was as follows: ----------------------------------------------------------------------------------------- Interest Foreign Rate Credit Exchange Equity Commodity Statement of Operations Risk Risk Rate Risk Risk Risk ----------------------------------------------------------------------------------------- Net realized gain (loss) on: Futures contracts $(30,306) $ -- $ -- $ -- $ -- ----------------------------------------------------------------------------------------- Total Value $(30,306) $ -- $ -- $ -- $ -- ========================================================================================= Change in net unrealized appreciation (depreciation) on: Futures contracts $ (7,315) $ -- $ -- $ -- $ -- ----------------------------------------------------------------------------------------- Total Value $ (7,315) $ -- $ -- $ -- $ -- ========================================================================================= Pioneer Balanced ESG Fund | Annual Report | 7/31/19 67 Report of Independent Registered Public Accounting Firm To the Board of Trustees of Pioneer Series Trust IV and the Shareowners of Pioneer Balanced ESG Fund (formerly Pioneer Classic Balanced Fund): -------------------------------------------------------------------------------- Opinion on the Financial Statements We have audited the accompanying statement of assets and liabilities of Pioneer Balanced ESG Fund (formerly Pioneer Classic Balanced Fund) (the "Fund") (one of the funds constituting Pioneer Series Trust IV (the "Trust")), including the schedule of investments, as of July 31, 2019, and the related statement of operations for the year then ended, the statements of changes in net assets for each of the two years in the period then ended and the financial highlights for each of the three years in the period then ended (collectively referred to as the "financial statements"). The financial highlights for the periods ended July 31, 2015 and July 31, 2016 were audited by another independent registered public accounting firm whose report, dated September 28, 2016, expressed an unqualified opinion on those financial highlights. In our opinion, the financial statements present fairly, in all material respects, the financial position of Pioneer Classic Balanced Fund at July 31, 2019, the results of its operations for the year then ended, the changes in its net assets for each of the two years in the period then ended, and the financial highlights for each of the three years in the period then ended, in conformity with U.S. generally accepted accounting principles. Basis for Opinion These financial statements are the responsibility of the Fund's management. Our responsibility is to express an opinion on the Fund's financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) ("PCAOB") and are required to be independent with respect to the Fund in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB. We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. The Fund is not required to have, nor were we engaged to perform, an audit of the Fund's internal control over financial reporting. As part of our audits, we are required to obtain an understanding of internal control over financial reporting, but not for the purpose of expressing an opinion on the effectiveness of the Fund's internal control over financial reporting. Accordingly, we express no such opinion. 68 Pioneer Balanced ESG Fund | Annual Report | 7/31/19 Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our procedures included confirmation of securities owned as of July 31, 2019, by correspondence with the custodian and brokers. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion. /s/ Ernst & Young LLP Boston, Massachusetts We have served as the Fund's auditor since 2017. September 29, 2019 Pioneer Balanced ESG Fund | Annual Report | 7/31/19 69 ADDITIONAL INFORMATION (unaudited) For the year ended July 31, 2019, certain dividends paid by the Fund may be subject to a maximum tax rate of 15%, as provided for by the Jobs and Growth Tax Relief Reconciliation Act (the Act) of 2003. The Fund intends to designate up to the maximum amount of such dividends allowable under the Act, as taxed at a maximum rate of 15%. Complete information will be computed and reported in conjunction with your 2019 form 1099-DIV. The qualifying percentage of the Fund's ordinary income dividends for the purpose of the corporate dividends received deduction was 70.96%. The percentages of the Fund's ordinary income distributions that are exempt from nonresident alien (NRA) tax withholding resulting from qualified interest income was 37.86%. Qualified interest income is exempt from nonresident alien (NRA) tax withholding. The percentage of the Fund's ordinary income distributions derived from qualified interest income was 37.70%. The Board of Trustees of Pioneer Classic Balanced Fund has approved changing the Fund's name to Pioneer Balanced ESG Fund. 70 Pioneer Balanced ESG Fund | Annual Report | 7/31/19 Trustees, Officers and Service Providers Investment Adviser and Administrator Amundi Pioneer Asset Management, Inc. Custodian and Sub-Administrator Brown Brothers Harriman & Co. Independent Registered Public Accounting Firm Ernst & Young LLP Principal Underwriter Amundi Pioneer Distributor, Inc. Legal Counsel Morgan, Lewis & Bockius LLP 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/us. This information is also available on the Securities and Exchange Commission's web site at www.sec.gov. Trustees and Officers The Fund's Trustees and officers are listed below, together with their principal occupations and other directorships they have held during at least the past five years. Trustees who are interested persons of the Fund within the meaning of the 1940 Act are referred to as Interested Trustees. Trustees who are not interested persons of the Fund are referred to as Independent Trustees. Each of the Trustees, except for Ms. Durnin, serves as a Trustee of each of the 43 U.S. registered investment portfolios for which Amundi Pioneer serves as investment adviser (the "Pioneer Funds"). Ms. Durnin serves as a Trustee of 38 Pioneer Funds. The address for all Trustees and all officers of the Fund is 60 State Street, Boston, Massachusetts 02109. The Statement of Additional Information of the Fund includes additional information about the Trustees and is available, without charge, upon request, by calling 1-800-225-6292. Pioneer Balanced ESG Fund | Annual Report | 7/31/19 71 Independent Trustees ------------------------------------------------------------------------------------------------------------------------------------ Name, Age and Position Term of Office and Other Directorships Held With the Fund Length of Service Principal Occupation Held by Trustee ------------------------------------------------------------------------------------------------------------------------------------ Thomas J. Perna (68) Trustee since 2006. Private investor (2004 - 2008 and Director, Broadridge Financial Chairman of the Board Serves until a successor 2013 - present); Chairman (2008 - Solutions, Inc. (investor and Trustee trustee is elected or earlier 2013) and Chief Executive Officer communications and securities retirement or removal. (2008 - 2012), Quadriserv, Inc. processing provider for financial (technology products for services industry) (2009 - securities lending industry); and present); Director, Quadriserv, Senior Executive Vice President, Inc. (2005 - 2013); and The Bank of New York (financial Commissioner, New Jersey State and securities services) Civil Service Commission (1986 - 2004) (2011 - 2015) ------------------------------------------------------------------------------------------------------------------------------------ David R. Bock (75) Trustee since 2005. Managing Partner, Federal City Director of New York Mortgage Trustee Serves until a successor Capital Advisors (corporate Trust (publicly-traded mortgage trustee is elected or earlier advisory services company) REIT) (2004 - 2009, 2012 - retirement or removal. (1997 - 2004 and 2008 - present); present); Director of The Swiss Interim Chief Executive Officer, Helvetia Fund, Inc. (closed-end Oxford Analytica, Inc. (privately fund) (2010 - 2017); Director of held research and consulting Oxford Analytica, Inc. (2008 - company) (2010); Executive Vice 2015); and Director of Enterprise President and Chief Financial Community Investment, Inc. Officer, I-trax, Inc. (publicly (privately-held affordable housing traded health care services finance company) (1985 - 2010) company) (2004 - 2007); and Executive Vice President and Chief Financial Officer, Pedestal Inc. (internet-based mortgage trading company) (2000 - 2002); Private Consultant (1995 - 1997); Managing Director, Lehman Brothers (1992 - 1995); and Executive, The World Bank (1979 - 1992) ------------------------------------------------------------------------------------------------------------------------------------ Diane Durnin (62) Trustee since 2019. Managing Director - Head of None Trustee Serves until a successor Product Strategy and Development, trustee is elected or earlier BNY Mellon Investment Management retirement or removal. (2012-2018); Vice Chairman - The Dreyfus Corporation (2005 - 2018): Executive Vice President Head of Product, BNY Mellon Investment Management (2007-2012); Executive Director- Product Strategy, Mellon Asset Management (2005-2007); Executive Vice President Head of Products, Marketing and Client Service, Dreyfus Corporation (2000-2005); and Senior Vice President Strategic Product and Business Development, Dreyfus Corporation (1994-2000) ------------------------------------------------------------------------------------------------------------------------------------ Benjamin M. Friedman (74) Trustee since 2008. William Joseph Maier Professor of Trustee, Mellon Institutional Trustee Serves until a successor Political Economy, Harvard Funds Investment Trust and Mellon trustee is elected or earlier University (1972 - present) Institutional Funds Master retirement or removal. Portfolio (oversaw 17 portfolios in fund complex) (1989 - 2008) ------------------------------------------------------------------------------------------------------------------------------------ 72 Pioneer Balanced ESG Fund | Annual Report | 7/31/19 ------------------------------------------------------------------------------------------------------------------------------------ Name, Age and Position Term of Office and Other Directorships Held With the Fund Length of Service Principal Occupation Held by Trustee ------------------------------------------------------------------------------------------------------------------------------------ Margaret B.W. Graham (72) Trustee since 2005. Founding Director, Vice-President None Trustee Serves until a successor and Corporate Secretary, The trustee is elected or earlier Winthrop Group, Inc. (consulting retirement or removal. firm) (1982 - present); Desautels Faculty of Management, McGill University (1999 - 2017); and Manager of Research Operations and Organizational Learning, Xerox PARC, Xerox's advance research center (1990-1994) ------------------------------------------------------------------------------------------------------------------------------------ Lorraine H. Monchak (62) Trustee since 2017. Chief Investment Officer, 1199 None Trustee (Advisory Trustee from SEIU Funds (healthcare workers 2014 - 2017) Serves union pension funds) (2001 - until a successor trustee present); Vice President - is elected or earlier International Investments Group, retirement or removal. American International Group, Inc. (insurance company) (1993 - 2001); Vice President - Corporate Finance and Treasury Group, Citibank, N.A. (1980 - 1986 and 1990 - 1993); Vice President - Asset/Liability Management Group, Federal Farm Funding Corporation (government- sponsored issuer of debt securities) (1988 - 1990); Mortgage Strategies Group, Shearson Lehman Hutton, Inc. (investment bank) (1987 - 1988); and Mortgage Strategies Group, Drexel Burnham Lambert, Ltd. (investment bank) (1986 - 1987) ------------------------------------------------------------------------------------------------------------------------------------ Marguerite A. Piret (71) Trustee since 2005. President and Chief Executive Director of New America High Trustee Serves until a successor Officer, Metric Financial Inc. Income Fund, Inc. (closed-end trustee is elected or earlier (formerly known as Newbury Piret investment company) (2004 - retirement or removal. Company) (investment banking firm) present); and Member, Board of (1981 - present) Governors, Investment Company Institute (2000 - 2006) ------------------------------------------------------------------------------------------------------------------------------------ Fred J. Ricciardi (72) Trustee since 2014. Consultant (investment company None Trustee Serves until a successor services) (2012 - present); trustee is elected or earlier Executive Vice President, BNY retirement or removal. Mellon (financial and investment company services) (1969 - 2012); Director, BNY International Financing Corp. (financial services) (2002 - 2012); Director, Mellon Overseas Investment Corp. (financial services) (2009 - 2012); Director, Financial Models (technology) (2005-2007); Director, BNY Hamilton Funds, Ireland (offshore investment companies) (2004-2007); Chairman/Director, AIB/BNY Securities Services, Ltd., Ireland (financial services) (1999-2006); and Chairman, BNY Alternative Investment Services, Inc. (financial services) (2005-2007) ------------------------------------------------------------------------------------------------------------------------------------ Pioneer Balanced ESG Fund | Annual Report | 7/31/19 73 Interested Trustees ------------------------------------------------------------------------------------------------------------------------------------ Name, Age and Position Term of Office and Other Directorships Held With the Fund Length of Service Principal Occupation Held by Trustee ------------------------------------------------------------------------------------------------------------------------------------ Lisa M. Jones (57)* Trustee since 2017. Director, CEO and President of None Trustee, President and Serves until a successor Amundi Pioneer Asset Management Chief Executive Officer trustee is elected or earlier USA, Inc. (since September 2014); retirement or removal Director, CEO and President of Amundi Pioneer Asset Management, Inc. (since September 2014); Director, CEO and President of Amundi Pioneer Distributor, Inc. (since September 2014); Director, CEO and President of Amundi Pioneer Institutional Asset Management, Inc. (since September 2014); Chair, Amundi Pioneer Asset Management USA, Inc., Amundi Pioneer Distributor, Inc. and Amundi Pioneer Institutional Asset Management, Inc. (September 2014 - 2018); Managing Director, Morgan Stanley Investment Management (2010 - 2013); Director of Institutional Business, CEO of International, Eaton Vance Management (2005 - 2010); and Director of Amundi USA, Inc. (since 2017) ------------------------------------------------------------------------------------------------------------------------------------ Kenneth J. Taubes (61)* Trustee since 2014. Director and Executive Vice None Trustee Serves until a successor President (since 2008) and Chief trustee is elected or earlier Investment Officer, U.S. (since retirement or removal 2010) of Amundi Pioneer Asset Management USA, Inc.; Director and Executive Vice President and Chief Investment Officer, U.S. of Amundi Pioneer (since 2008); Executive Vice President and Chief Investment Officer, U.S. of Amundi Pioneer Institutional Asset Management, Inc. (since 2009); Portfolio Manager of Amundi Pioneer (since 1999); and Director of Amundi USA, Inc. (since 2017) ------------------------------------------------------------------------------------------------------------------------------------ * Ms. Jones and Mr. Taubes are Interested Trustees because they are officers or directors of the Fund's investment adviser and certain of its affiliates. 74 Pioneer Balanced ESG Fund | Annual Report | 7/31/19 Fund Officers ------------------------------------------------------------------------------------------------------------------------------------ Name, Age and Position Term of Office and Other Directorships Held With the Fund Length of Service Principal Occupation Held by Officer ------------------------------------------------------------------------------------------------------------------------------------ Christopher J. Kelley (54) Since 2005. Serves Vice President and Associate None Secretary and Chief at the discretion of General Counsel of Amundi Pioneer Legal Officer the Board since January 2008; Secretary and Chief Legal Officer of all of the Pioneer Funds since June 2010; Assistant Secretary of all of the Pioneer Funds from September 2003 to May 2010; and Vice President and Senior Counsel of Amundi Pioneer from July 2002 to December 2007 ------------------------------------------------------------------------------------------------------------------------------------ Carol B. Hannigan (58) Since 2010. Serves Fund Governance Director of Amundi None Assistant Secretary at the discretion of Pioneer since December 2006 and the Board Assistant Secretary of all the Pioneer Funds since June 2010; Manager - Fund Governance of Amundi Pioneer from December 2003 to November 2006; and Senior Paralegal of Amundi Pioneer from January 2000 to November 2003 ------------------------------------------------------------------------------------------------------------------------------------ Thomas Reyes (56) Since 2010. Serves Senior Counsel of Amundi Pioneer None Assistant Secretary at the discretion of since May 2013 and Assistant the Board Secretary of all the Pioneer Funds since June 2010; and Counsel of Amundi Pioneer from June 2007 to May 2013 ------------------------------------------------------------------------------------------------------------------------------------ Mark E. Bradley (59) Since 2008. Serves Vice President - Fund Treasury of None Treasurer and Chief Financial at the discretion of Amundi Pioneer; Treasurer of all and Accounting Officer the Board of the Pioneer Funds since March 2008; Deputy Treasurer of Amundi Pioneer from March 2004 to February 2008; and Assistant Treasurer of all of the Pioneer Funds from March 2004 to February 2008 ------------------------------------------------------------------------------------------------------------------------------------ Luis I. Presutti (54) Since 2005. Serves Director - Fund Treasury of Amundi None Assistant Treasurer at the discretion of Pioneer; and Assistant Treasurer the Board of all of the Pioneer Funds ------------------------------------------------------------------------------------------------------------------------------------ Pioneer Balanced ESG Fund | Annual Report | 7/31/19 75 Fund Officers (continued) ------------------------------------------------------------------------------------------------------------------------------------ Name, Age and Position Term of Office and Other Directorships Held With the Fund Length of Service Principal Occupation Held by Officer ------------------------------------------------------------------------------------------------------------------------------------ Gary Sullivan (61) Since 2005. Serves Senior Manager - Fund Treasury of None Assistant Treasurer at the discretion of Amundi Pioneer; and Assistant the Board Treasurer of all of the Pioneer Funds ------------------------------------------------------------------------------------------------------------------------------------ David F. Johnson (39) Since 2009. Serves Senior Manager - Fund Treasury of None Assistant Treasurer at the discretion of Amundi Pioneer since November 2008; the Board Assistant Treasurer of all of the Pioneer Funds since January 2009; and Client Service Manager - Institutional Investor Services at State Street Bank from March 2003 to March 2007 ------------------------------------------------------------------------------------------------------------------------------------ John Malone (48) Since 2018. Serves Managing Director, Chief None Chief Compliance Officer at the discretion of Compliance Officer of Amundi the Board Pioneer Asset Management; Amundi Pioneer Institutional Asset Management, Inc.; and the Pioneer Funds since September 2018; and Chief Compliance Officer of Amundi Pioneer Distributor, Inc. since January 2014. ------------------------------------------------------------------------------------------------------------------------------------ Kelly O'Donnell (48) Since 2006. Serves Vice President - Amundi Pioneer None Anti-Money Laundering at the discretion of Asset Management; and Anti-Money Officer the Board Laundering Officer of all the Pioneer Funds since 2006 ------------------------------------------------------------------------------------------------------------------------------------ 76 Pioneer Balanced ESG Fund | Annual Report | 7/31/19 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 FactFoneSM 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 219427 Kansas City, MO 64121-9427 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/us This report must be preceded or accompanied by a prospectus. The Fund files a complete schedule of portfolio holdings with the Securities and Exchange Commission for the first and third quarters of each fiscal year as an exhibit to its reports on Form N-PORT. Shareholders may view the filed Form N-PORT by visiting the Commission's web site at https://www.sec.gov. [LOGO] Amundi Pioneer ============== ASSET MANAGEMENT Amundi Pioneer Asset Management, Inc. 60 State Street Boston, MA 02109 www.amundipioneer.com/us Securities offered through Amundi Pioneer Distributor, Inc. 60 State Street, Boston, MA 02109 Underwriter of Pioneer Mutual Funds, Member SIPC [C] 2019 Amundi Pioneer Asset Management 19418-13-0919 Pioneer Multi-Asset Income Fund -------------------------------------------------------------------------------- Annual Report | July 31, 2019 -------------------------------------------------------------------------------- Ticker Symbols: Class A PMAIX Class C PMACX Class K PMFKX Class R PMFRX Class Y PMFYX Beginning in March 2021, as permitted by regulations adopted by the Securities and Exchange Commission, paper copies of the Fund's shareholder reports like this one will no longer be sent by mail, unless you specifically request paper copies of the reports from the Fund or from your financial intermediary, such as a broker-dealer, bank or insurance company. Instead, the reports will be made available on the Fund's website, and you will be notified by mail each time a report is posted and provided with a website link to access the report. If you already elected to receive shareholder reports electronically, you will not be affected by this change and you need not take any action. You may elect to receive shareholder reports and other communications electronically by contacting your financial intermediary or, if you invest directly with the Fund, by calling 1-800-225-6292. You may elect to receive all future reports in paper free of charge. If you invest directly with the Fund, you can inform the Fund that you wish to continue receiving paper copies of your shareholder reports by calling 1-800-225-6292. If you invest through a financial intermediary, you can contact your financial intermediary to request that you continue to receive paper copies of your shareholder reports. Your election to receive reports in paper will apply to all funds held in your account if you invest through your financial intermediary or all funds held within the Pioneer Fund complex if you invest directly. [LOGO] Amundi Pioneer ============== ASSET MANAGEMENT visit us: www.amundipioneer.com/us Table of Contents President's Letter 2 Portfolio Management Discussion 4 Portfolio Summary 11 Prices and Distributions 12 Performance Update 13 Comparing Ongoing Fund Expenses 18 Schedule of Investments 20 Financial Statements 42 Notes to Financial Statements 51 Report of Independent Registered Public Accounting Firm 70 Additional Information 72 Trustees, Officers and Service Providers 73 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/19 1 President's Letter Since 1928, active portfolio management based on in-depth, fundamental research, has been the foundation of Amundi Pioneer's investment approach. We believe an active management investment strategy is a prudent approach to investing, especially during periods of market volatility, which can result from any number of risk factors, including slow U.S. economic growth, rising interest rates, and geopolitical factors. Of course, in today's global economy, risk factors extend well beyond U.S. borders. In fact, it's not unusual for political and economic issues on the international front to cause or contribute to volatility in U.S. markets. At Amundi Pioneer, each security under consideration is researched by our team of experienced investment professionals, who communicate directly with the management teams of those companies. At the end of this research process, if we have conviction in a company's business model and management team, and regard the security as a potentially solid investment opportunity, an Amundi Pioneer portfolio manager makes an active decision to invest in that security. The portfolio resulting from these decisions represents an expression of his or her convictions, and strives to balance overall risk and return opportunity. As an example, the Standard & Poor's 500 Index -- the predominant benchmark for many U.S. Large-Cap Core Equity funds -- has 500 stocks. An Amundi Pioneer portfolio manager chooses to invest in only those companies that he or she believes can offer the most attractive opportunities to pursue the fund's investment objective, thus potentially benefiting the fund's shareowners. This process results in a portfolio that does not own all 500 stocks, but a much narrower universe. The same active decision to invest in a company is also applied when we decide to sell a security, due to changing fundamentals, valuation concerns, or market risks. We apply this active decision-making across all of our equity, fixed-income, and global portfolios. Today, as investors, we have many options. It is our view that active management can serve shareholders well not only when markets are thriving, but also during periods of market volatility and uncertainty, thus making it a compelling investment choice. As you consider the many choices today, 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. 2 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/19 We greatly appreciate the trust you have placed in us and look forward to continuing to serve you in the future. Sincerely, /s/ Lisa M. Jones Lisa M. Jones Head of the Americas, President and CEO of U.S. Amundi Pioneer Asset Management USA, Inc. July 31, 2019 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 Multi-Asset Income Fund | Annual Report | 7/31/19 3 Portfolio Management Discussion | 7/31/19 In the following interview, portfolio manager Marco Pirondini discusses Pioneer Multi-Asset Income Fund's performance and investment strategies during 12-month period ended July 31, 2019, along with his outlook for the coming months. Mr. Pirondini, Senior Managing Director, Head of Equities, U.S., and a portfolio manager at Amundi Pioneer Asset Management, Inc. (Amundi Pioneer), co-manages the Fund along with Howard Weiss, a vice president and a portfolio manager at Amundi Pioneer, and Michele Garau, a senior vice president and a portfolio manager at Amundi Pioneer. Q How did the Fund perform during the 12-month period ended July 31, 2019? A The Fund's Class A shares returned -1.56% at net asset value during the 12-month period ended July 31, 2019, while the Fund's benchmarks, the Bloomberg Barclays U.S. Aggregate Bond Index (the Bloomberg Barclays Index) and the Morgan Stanley Capital International Index (MSCI) All Country World ND Index (the MSCI Index)1, returned 8.08% and 2.95%, respectively. During the same period, the average return of the 538 mutual funds in Morningstar's 30% to 50% Equity Allocation Funds category was 4.39%. Q How would you describe the global investment environment during the 12-month period ended July 31, 2019? A The period began on an upbeat note in August 2018, with relatively low market volatility and investors showing an appetite for higher-risk assets. Better-than-expected U.S. corporate earnings reports and jobs data helped to bolster optimism about the U.S. economy and alleviated worries about global economic growth. However, the markets became increasingly volatile as the period progressed, seesawing between bullish (risk-on) and bearish (risk-off) sentiment. 1 The MSCI information may only be used for your internal use, may not be reproduced or redisseminated in any form and may not be used as a basis for or a component of any financial instruments or products or indices. None of the MSCI information is intended to constitute investment advice or a recommendation to make (or refrain from making) any kind of investment decision and may not be relied on as such. Historical data and analysis should not be taken as an indication or guarantee of any future performance analysis, forecast or prediction. The MSCI information is provided on an "as is" basis and the user of this information assumes the entire risk of any use made of this information. MSCI, each of its affiliates and each other person involved in or related to compiling, computing or creating any MSCI information (collectively, the "MSCI Parties") expressly disclaims all warranties (including, without limitation, any warranties of originality, accuracy, completeness, timeliness, non-infringement, merchantability and fitness for a particular purpose) with respect to this information. Without limiting any of the foregoing, in no event shall any MSCI Party have any liability for any direct, indirect, special, incidental, punitive, consequential (including, without limitation, lost profits) or any other damages. 4 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/19 The fourth quarter of 2018 was especially challenging. Investor confidence abruptly turned negative in October, and a "flight to safety" into less-risky assets ensued, triggering a steep sell-off in global stocks. Investors sold higher-risk assets in response to growing concerns about the U.S./China trade dispute, rising U.S. interest rates, cascading oil prices, and increasing challenges to the political status quo around the globe, driven in large part by rising populism. The Standard & Poor's 500 Index (the S&P 500) declined by more than 13% during the fourth quarter of 2018, including a 9% drop in December -- the worst December performance for stocks since the Great Depression. The S&P 500's struggles contributed to a similar decline in global developed market equities, which were down by 13% over the fourth quarter, as measured by the MSCI Index. The U.S. Federal Reserve (the Fed) raised its benchmark interest rate once during the period, in December 2018. Wary market participants had anticipated the move, which represented the Fed's fourth interest-rate increase during calendar year 2018. However, the Fed's commentaries became significantly less aggressive following the December rate increase. Fed Chair Jerome Powell stated that he believed both economic growth and inflation would moderate in the future, and signaled a more patient approach with regard to future rate increases. Powell also indicated that the Fed was not on a "preset course" with its monetary policy and would remain "on hold" with respect to future rate adjustments. With global economic momentum slowing, other central banks, such as the European Central Bank (ECB), also began shying away from further monetary tightening. In a striking reversal from December 2018, global equities rallied strongly during the January to April 2019 timeframe. January's performance was especially noteworthy, with the S&P 500 and the MSCI Index rising by 8% and 7.9%, respectively. With signs that the U.S./China trade talks were progressing and the prospect of the United Kingdom's hard exit from the European Union ("Brexit") appearing less likely, investors' fears eased. The Fed's decision to hold rates steady during the spring also fueled the rally. Equity markets were not the only beneficiaries of the momentum swing in the first part of 2019, as global fixed-income markets also rallied after the ECB and the People's Bank of China adopted more dovish monetary policy stances in response to slowing economic growth rates. Pioneer Multi-Asset Income Fund | Annual Report | 7/31/19 5 The positive momentum did not last, however, as much of the global equity market's year-to-date gains evaporated in May, when the U.S./China trade talks hit another impasse and both countries announced an increase in tariffs. Global equities sold off sharply during the month. The markets once again recovered over the final two months of the 12-month period, with leading U.S. equity indices touching new highs. Investors responded to a general cooling in global tensions and the dovish commentaries from the ECB and the Fed. The ECB affirmed its "whatever it takes" sentiment and signaled the potential for near-term monetary stimulus. Meanwhile, at its June meeting, the Fed, with uncertainties increasing and economic data softening, reiterated its willingness to act "as appropriate to sustain economic expansion," and Powell indicated that the next rate move would likely be a cut, not an increase. As the 12-month period came to a close in July, the Fed reduced its benchmark federal funds rate and terminated its balance-sheet-reduction program two months early. Given the steady commitments to monetary easing of major central banks, global fixed-income markets enjoyed strong performance over the 12-month period. Q What were the primary factors that drove the Fund's benchmark-relative performance during the 12-month period ended July 31, 2019? A The primary factor behind the Fund's benchmark-relative underperformance for the 12-month period was the portfolio's short-duration positioning within fixed income compared with the Bloomberg Barclays Index. (Duration is a measure of the sensitivity of the price, or the value of principal, of a fixed-income investment to a change in interest rates, expressed as a number of years.) We maintained a shorter duration to help cushion the portfolio against the effects of rising interest rates, given the solid economic growth trends in the United States. However, as rates fell and bond prices rallied for much of the 12-month period, the short-duration position ultimately detracted significantly from the Fund's relative returns. The short-duration positioning included an underweight to longer-duration investment-grade corporate bonds. That stance also detracted from the Fund's benchmark-relative performance as investment-grade corporates turned in very strong performance over the 12-month period. Ultimately, we took measures to extend the portfolio's duration during the second half of the period by increasing its allocation to U.S. high-yield bonds. Individual portfolio positions that detracted from the Fund's benchmark-relative performance during the 12-month period included equity holdings in Vodafone Group, Mitsubishi UFJ, PAC Systems, and Bank of America. 6 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/19 On the positive side, the portfolio's equity hedges, which we use in an attempt to shelter the Fund from the effects of market downturns, aided benchmark-relative performance in the waning months of 2018. We had elected to increase the hedge positions during the September through October 2018 timeframe, out of concern that the potential burden of increased tariffs resulting from trade disputes would have a negative effect on corporate profits. The sharp market correction in late 2018 created meaningful returns for the Fund's equity hedges, and helped offset the losses incurred among the portfolio's investments in equity and equity notes. Our equity-hedging strategy consisted of maintaining core portfolio holdings of equities (positions in common stocks), plus customized equity-linked notes; those holdings were offset by taking short positions in equity-index futures contracts, such as S&P 500 futures. With regard to individual positions that aided the Fund's benchmark-relative performance during the 12-month period, the leading positive contributors among the portfolio's equity holdings were the common stocks of Abu Dhabi Commercial Bank and Apple. In fixed income, the top positive contributors to the Fund's benchmark-relative returns were investments in the high-yield bonds issued by CenturyLink. Q Did the Fund invest in any derivative securities during the 12-month period ended July 31, 2019? If so, did the derivatives have an effect on the Fund's benchmark-relative performance during the period? A Yes, as noted earlier, the use of equity-index futures and other equity hedging positions produced meaningful gains for the Fund during the period, and helped offset losses generated from other riskier holdings among the portfolio's common stock and equity-linked positions. We also used forward foreign currency contracts (currency forwards) in an attempt to manage currency risk associated with several of the Fund's non-U.S. dollar fixed-income holdings, and fixed-income index futures, as those securities can potentially help address systematic market risks across the portfolio. The forwards had a net-neutral effect on benchmark-relative performance during the 12-month period. Q Did the Fund's yield, or distributions* to shareholders, change at all during the 12-month period ended July 31, 2019? A The Fund's distributions remained stable over the 12-month period, with an average monthly distribution of $0.050 per share. * Distributions are not guaranteed. Pioneer Multi-Asset Income Fund | Annual Report | 7/31/19 7 Q What is your outlook for the coming months? A At the close of the 12-month period, the financial markets were enjoying solidly positive performance across the board on a year-to-date basis, and were close to all-time highs. Investor expectations for a new wave of accommodative central-bank monetary policies have fueled much of the momentum, given weakness in the global economic outlook and muted inflationary pressures. However, the sudden deterioration of trade talks in May 2019 increased the likelihood of a protracted U.S./China trade dispute. The prospect of an all-out trade war has created uncertainties for the global economy and for corporations that have invested in developing global supply chains over the past 20 years, thus threatening profit margins. We do not believe a recession is imminent, but the current market environment is difficult to navigate, and that warrants a degree of caution with regard to owning riskier assets. Given the heightened uncertainty, we have positioned the Fund with a value-orientation on the equity side and a lower-duration stance relative to the Bloomberg Barclays Index on the fixed-income side. At period-end, the portfolio was overweight to the energy and financials sectors, which we believe offer more attractive valuations than other sectors, and could possibly contribute to solid risk-adjusted returns over time. 8 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/19 Please refer to the Schedule of Investments on pages 20-41 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. High yield bonds possess greater price volatility, illiquidity, and possibility of default. Investments in fixed-income securities involve interest rate, credit, inflation, and reinvestment risks. As interest rates rise, the value of fixed income securities falls. Prepayment risk is the chance that an issuer may exercise the 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 Fund may invest in subordinated securities which may be disproportionately adversely affected by a default or even a perceived decline in creditworthiness of the issuer. International investments are subject to special risks including currency fluctuations, social, economic and political uncertainties, which could increase volatility. These risks are magnified in emerging markets. The Fund may invest in inflation-linked securities. As inflationary expectations increase, inflation-linked securities may become more attractive, because they protect future interest payments against inflation. Conversely, as inflationary concerns decrease, inflation-linked securities will become less attractive and less valuable. The Fund may invest in insurance-linked securities. The return of principal and the payment of interest and/or dividends on insurance-linked securities are contingent on the non-occurrence of a pre-defined "trigger" event, such as a hurricane or an earthquake of a specific magnitude. The Fund may invest in floating-rate loans. The value of collateral, if any, securing a floating rate loan can decline or may be insufficient to meet the issuer's obligations or may be difficult to liquidate. The Fund may invest in underlying funds (including ETFs). In addition to the Fund's operating expenses, you will indirectly bear the operating expenses of investments in any underlying funds. Investments in equity securities are subject to price fluctuation. Pioneer Multi-Asset Income Fund | Annual Report | 7/31/19 9 Investments in small-and mid-cap stocks involve greater risks and volatility than investments in large-cap stocks. The Fund may invest in master limited partnerships, which are subject to increased risks of liquidity, price valuation, control, voting rights and taxation. In addition, the structure affords fewer protections to investors in the Partnership than direct investors in a corporation. The Fund may invest in zero-coupon bonds and payment-in-kind securities, which may be more speculative and fluctuate more in value than other fixed income securities. The accrual of income from these securities is payable as taxable annual dividends to shareholders. The Fund and some of the underlying funds in which the Fund invests may use derivatives, such as options and futures, which can be illiquid, may disproportionately increase losses, and have a potentially large impact on Fund performance. The Fund may invest in credit default swaps, which may in some cases be illiquid, and they increase credit risk since the Fund has exposure to both the issuer of the referenced obligation and the counterparty to the credit default swap. The Fund and some of the underlying funds employ leverage, which increases the volatility of investment returns and subjects the Fund to magnified losses if an underlying fund's investments decline in value. These risks may increase share price volatility. There is no assurance that these and other strategies used by the Fund or underlying funds will be successful. Please see the prospectus for a more complete discussion of the Fund's risks. Before investing, consider the product's investment objectives, risks, charges and expenses. Contact your advisor or Amundi Pioneer Asset Management, Inc., for a prospectus or summary prospectus containing this information. Read it carefully. Any information in this shareholder report regarding market or economic trends or the factors influencing the Fund's historical or future performance are statements of opinion as of the date of this report. Past performance is not a guarantee of future results. 10 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/19 Portfolio Summary | 7/31/19 Portfolio Diversification -------------------------------------------------------------------------------- (As a percentage of total investments)* [THE FOLLOWING DATA WAS REPRESENTED AS A PIE CHART IN THE PRINTED MATERIAL] Common Stocks 44.7% Equity-Linked Notes 19.6% Corporate Bonds 19.1% Collateralized Mortgage Obligations 4.9% Foreign Government Bonds 4.3% Asset Backed Securities 2.5% Investment Companies 2.4% Insurance-Linked Securities 2.0% Affiliated Closed-End Fund (j) 0.5% Over The Counter (OTC) Put Option Purchased 0.0%+ Right/Warrant 0.0%+ + Amount rounds to less than 0.1%. (j) Pioneer Floating Rate Trust is an affiliated fund managed by Amundi Pioneer Asset Management, Inc. Sector Distribution -------------------------------------------------------------------------------- (As a percentage of total investments)* [THE FOLLOWING DATA WAS REPRESENTED AS A PIE CHART IN THE PRINTED MATERIAL] Industrials 14.4% Energy 13.5% Communication Services 12.2% Financials 10.9% Information Technology 7.9% Consumer Discretionary 7.0% Mortgage Securities 4.9% Government 4.3% Consumer Cyclical 4.2% Materials 4.2% Technology 4.0% Real Estate 3.6% Asset Backed Securities 2.5% Consumer Non-cyclical 2.4% Health Care 2.1% Consumer Staples 1.5% Utilities 0.4% 10 Largest Holdings -------------------------------------------------------------------------------- (As a percentage of total investments)* 1. Royal Dutch Shell Plc 2.56% -------------------------------------------------------------------------------- 2. CenturyLink, Inc., 7.65%, 3/15/42 1.97 -------------------------------------------------------------------------------- 3. CenturyLink, Inc., 7.6%, 9/15/39 1.87 -------------------------------------------------------------------------------- 4. TOTAL SA 1.80 -------------------------------------------------------------------------------- 5. AT&T, Inc. 1.77 -------------------------------------------------------------------------------- 6. Indonesia Treasury Bond, 8.75%, 5/15/31 1.42 -------------------------------------------------------------------------------- 7. Energy Transfer LP 1.37 -------------------------------------------------------------------------------- 8. ABN AMRO Bank NV (144A) 1.34 -------------------------------------------------------------------------------- 9. Indonesia Treasury Bond, 8.375%, 3/15/24 1.28 -------------------------------------------------------------------------------- 10. Invesco Senior Income Trust 1.27 -------------------------------------------------------------------------------- * 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 securities. Pioneer Multi-Asset Income Fund | Annual Report | 7/31/19 11 Prices and Distributions | 7/31/19 Net Asset Value per Share -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- Class 7/31/19 7/31/18 -------------------------------------------------------------------------------- A $10.79 $11.59 -------------------------------------------------------------------------------- C $10.76 $11.56 -------------------------------------------------------------------------------- K $11.12 $11.95 -------------------------------------------------------------------------------- R $10.83 $11.64 -------------------------------------------------------------------------------- Y $10.77 $11.57 -------------------------------------------------------------------------------- Distributions per Share: 8/1/18-7/31/19 -------------------------------------------------------------------------------- Net Investment Short-Term Long-Term Class Income Capital Gains Capital Gains -------------------------------------------------------------------------------- A $0.6157 $ -- $ -- -------------------------------------------------------------------------------- C $0.5300 $ -- $ -- -------------------------------------------------------------------------------- K $0.6675 $ -- $ -- -------------------------------------------------------------------------------- R $0.5503 $ -- $ -- -------------------------------------------------------------------------------- Y $0.6383 $ -- $ -- -------------------------------------------------------------------------------- Index Definitions -------------------------------------------------------------------------------- The Bloomberg Barclays U.S. Aggregate Bond Index is an unmanaged measure of the U.S. bond market. The MSCI All Country World ND (with Net Dividends) Index is an unmanaged, free float-adjusted, market capitalization-weighted index that is designed to measure the equity market performance of developed and emerging markets. The Index consists of 45 country indices comprising 24 developed and 21 emerging market country indices. Index returns are calculated monthly, assume reinvestment of dividends and, unlike Fund returns, do not reflect any fees, expenses or sales charges. It is not possible to invest directly in an index. The indices defined here pertains to the "Value of $10,000 Investment" and "Value of $5 Million Investment" charts on pages 13-17. 12 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/19 Performance Update | 7/31/19 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 Multi-Asset Income Fund at public offering price during the periods shown, compared to that of the Bloomberg Barclays U.S. Aggregate Bond Index and the MSCI All Country World ND Index. Average Annual Total Returns (As of July 31, 2019) ---------------------------------------------------------- Bloomberg MSCI Barclays All Net Public U.S. Country Asset Offering Aggregate World Value Price Bond ND Period (NAV) (POP) Index Index ---------------------------------------------------------- Since inception 12/22/11 7.14% 6.50% 2.82% 9.98% 5 year 3.74 2.79 3.05 6.48 1 year -1.56 -5.99 8.08 2.95 ---------------------------------------------------------- Expense Ratio (Per prospectus dated December 1, 2018) ---------------------------------------------------------- Gross Net ---------------------------------------------------------- 0.95% 0.90% ---------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $10,000 Investment Pioneer Multi-Asset Bloomberg Barclays MSCI All Country Income Fund U.S. Aggregate Bond Index World ND Index 12/11 $ 9,550 $10,000 $10,000 7/12 $10,401 $10,378 $10,710 7/13 $11,808 $10,181 $12,905 7/14 $13,434 $10,585 $14,958 7/15 $13,287 $10,884 $15,382 7/16 $13,395 $11,530 $15,314 7/17 $15,555 $11,470 $17,926 7/18 $16,397 $11,379 $19,892 7/19 $16,141 $12,298 $20,478 Call 1-800-225-6292 or visit www.amundipioneer.com/us 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. NAV 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 December 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 for more information. Expense ratios in the financial highlights, unlike those shown in the prospectus, do not reflect acquired fund fees and expenses. 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 see the financial highlights for a more current expense ratio. Pioneer Multi-Asset Income Fund | Annual Report | 7/31/19 13 Performance Update | 7/31/19 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 Multi-Asset Income Fund during the periods shown, compared to that of the Bloomberg Barclays U.S. Aggregate Bond Index and the MSCI All Country World ND Index. Average Annual Total Returns (As of July 31, 2019) ---------------------------------------------------------- Bloomberg MSCI Barclays All U.S. Country Aggregate World If If Bond ND Period Held Redeemed Index Index ---------------------------------------------------------- Since inception 12/22/11 6.27% 6.27% 2.82% 9.98% 5 year 2.92 2.92 3.05 6.48 1 year -2.33 -2.33 8.08 2.95 ---------------------------------------------------------- Expense Ratio (Per prospectus dated December 1, 2018) ---------------------------------------------------------- Gross ---------------------------------------------------------- 1.70% ---------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $10,000 Investment Pioneer Multi-Asset Bloomberg Barclays MSCI All Country Income Fund U.S. Aggregate Bond Index World ND Index 12/11 $10,000 $10,000 $10,000 7/12 $10,844 $10,378 $10,710 7/13 $12,188 $10,181 $12,905 7/14 $13,753 $10,585 $14,958 7/15 $13,493 $10,884 $15,382 7/16 $13,502 $11,530 $15,314 7/17 $15,543 $11,470 $17,926 7/18 $16,259 $11,379 $19,892 7/19 $15,880 $12,298 $20,478 Call 1-800-225-6292 or visit www.amundipioneer.com/us 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 subject to a 1% contingent deferred sales charge (CDSC). "If Held" results represent the percent change in net asset value per share. NAV 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. Expense ratios in the financial highlights, unlike those shown in the prospectus, do not reflect acquired fund fees and expenses. 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 see the financial highlights for a more current expense ratio. 14 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/19 Performance Update | 7/31/19 Class K Shares Investment Returns -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $5 million investment made in Class K shares of Pioneer Multi-Asset Income Fund during the periods shown, compared to that of the Bloomberg Barclays U.S. Aggregate Bond Index and the MSCI All Country World ND Index. Average Annual Total Returns (As of July 31, 2019) ---------------------------------------------------------- Bloomberg MSCI Barclays All Net U.S. Country Asset Aggregate World Value Bond ND Period (NAV) Index Index ---------------------------------------------------------- Since inception 12/22/11 7.74% 2.82% 9.98% 5 year 4.62 3.05 6.48 1 year -1.32 8.08 2.95 ---------------------------------------------------------- Expense Ratio (Per prospectus dated December 1, 2018) ---------------------------------------------------------- Gross ---------------------------------------------------------- 0.64% ---------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $5 Million Investment Pioneer Multi-Asset Bloomberg Barclays MSCI All Country Income Fund U.S. Aggregate Bond Index World ND Index 12/11 $5,000,000 $5,000,000 $ 5,000,000 7/12 $5,445,326 $5,189,200 $ 5,355,002 7/13 $6,182,044 $5,090,345 $ 6,452,651 7/14 $7,033,313 $5,292,389 $ 7,479,249 7/15 $6,971,183 $5,441,850 $ 7,691,064 7/16 $7,124,872 $5,764,826 $ 7,657,023 7/17 $8,311,487 $5,735,151 $ 8,963,156 7/18 $8,935,485 $5,689,263 $ 9,946,011 7/19 $8,817,240 $6,149,001 $10,239,205 Call 1-800-225-6292 or visit www.amundipioneer.com/us for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. The performance shown for Class K shares for the period prior to the commencement of operations of Class K shares on December 1, 2014, is the net asset value performance of the Fund's Class A shares, which has not been restated to reflect any differences in expenses, including Rule 12b-1 fees applicable to Class A shares. Since fees for Class A shares generally are higher than those of Class K shares, the performance of Class K shares prior to their inception would have been higher than the performance shown. For the period beginning December 1, 2014, the actual performance of Class K shares is reflected. Class K shares are not subject to sales charges and are available for limited groups of eligible investors, including institutional investors. All results are historical and assume the reinvestment of dividends and capital gains. Other share classes are available for which performance and expenses will differ. Performance results reflect any applicable expense waivers in effect during the periods shown. Without such waivers Fund performance would be lower. Waivers may not be in effect for all funds. Certain fee waivers are contractual through a specified period. Otherwise, fee waivers can be rescinded at any time. See the prospectus and financial statements for more information. Expense ratios in the financial highlights, unlike those shown in the prospectus, do not reflect acquired fund fees and expenses. 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 see the financial highlights for a more current expense ratio. Pioneer Multi-Asset Income Fund | Annual Report | 7/31/19 15 Performance Update | 7/31/19 Class R Shares Investment Returns -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $10,000 investment made in Class R shares of Pioneer Multi-Asset Income Fund during the periods shown, compared to that of the Bloomberg Barclays U.S. Aggregate Bond Index and the MSCI All Country World ND Index. Average Annual Total Returns (As of July 31, 2019) ---------------------------------------------------------- Bloomberg MSCI Barclays All Net U.S. Country Asset Aggregate World Value Bond ND Period (NAV) Index Index ---------------------------------------------------------- Since inception 12/22/11 6.88% 2.82% 9.98% 5 year 3.36 3.05 6.48 1 year -2.22 8.08 2.95 ---------------------------------------------------------- Expense Ratio (Per prospectus dated December 1, 2018) ---------------------------------------------------------- Gross ---------------------------------------------------------- 1.45% ---------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $10,000 Investment Pioneer Multi-Asset Bloomberg Barclays MSCI All Country Income Fund U.S. Aggregate Bond Index World ND Index 12/11 $10,000 $10,000 $10,000 7/12 $10,891 $10,378 $10,710 7/13 $12,364 $10,181 $12,905 7/14 $14,067 $10,585 $14,958 7/15 $13,946 $10,884 $15,382 7/16 $14,003 $11,530 $15,314 7/17 $16,177 $11,470 $17,926 7/18 $16,967 $11,379 $19,892 7/19 $16,591 $12,298 $20,478 Call 1-800-225-6292 or visit www.amundipioneer.com/us for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. The performance shown for Class R shares for the period prior to the commencement of operations of Class R shares on December 1, 2014, is based on the performance of Class A shares, reduced to reflect the higher distribution and service fees of Class R shares. For the period beginning December 1, 2014, the actual performance of Class R shares is reflected. Class R shares are not subject to sales charges and are available for limited groups of eligible investors, including institutional investors. All results are historical and assume the reinvestment of dividends and capital gains. Other share classes are available for which performance and expenses will differ. Performance results reflect any applicable expense waivers in effect during the periods shown. Without such waivers Fund performance would be lower. Waivers may not be in effect for all funds. Certain fee waivers are contractual through a specified period. Otherwise, fee waivers can be rescinded at any time. See the prospectus and financial statements for more information. Expense ratios in the financial highlights, unlike those shown in the prospectus, do not reflect acquired fund fees and expenses. 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 see the financial highlights for a more current expense ratio. 16 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/19 Performance Update | 7/31/19 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 Multi-Asset Income Fund during the periods shown, compared to that of the Bloomberg Barclays U.S. Aggregate Bond Index and the MSCI All Country World ND Index. Average Annual Total Returns (As of July 31, 2019) ---------------------------------------------------------- Bloomberg MSCI Barclays All Net U.S. Country Asset Aggregate World Value Bond ND Period (NAV) Index Index ---------------------------------------------------------- Since inception 12/22/11 7.33% 2.82% 9.98% 5 year 3.94 3.05 6.48 1 year -1.36 8.08 2.95 ---------------------------------------------------------- Expense Ratio (Per prospectus dated December 1, 2018) ---------------------------------------------------------- Gross Net ---------------------------------------------------------- 0.74% 0.70% ---------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $5 Million Investment Pioneer Multi-Asset Bloomberg Barclays MSCI All Country Income Fund U.S. Aggregate Bond Index World ND Index 12/11 $5,000,000 $5,000,000 $ 5,000,000 7/12 $5,454,950 $5,189,200 $ 5,355,002 7/13 $6,193,872 $5,090,345 $ 6,452,651 7/14 $7,061,687 $5,292,389 $ 7,479,249 7/15 $6,999,207 $5,441,850 $ 7,691,064 7/16 $7,069,582 $5,764,826 $ 7,657,023 7/17 $8,219,648 $5,735,151 $ 8,963,156 7/18 $8,683,455 $5,689,263 $ 9,946,011 7/19 $8,565,190 $6,149,001 $10,239,205 Call 1-800-225-6292 or visit www.amundipioneer.com/us 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 December 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 for more information. Expense ratios in the financial highlights, unlike those shown in the prospectus, do not reflect acquired fund fees and expenses. 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 see the financial highlights for a more current expense ratio. Pioneer Multi-Asset Income Fund | Annual Report | 7/31/19 17 Comparing Ongoing Fund Expenses As a shareowner in the Fund, you incur two types of costs: (1) ongoing costs, including management fees, distribution and/or service (12b-1) fees, and other Fund expenses; and (2) transaction costs, including sales charges (loads) on purchase payments. 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 Multi-Asset Income Fund Based on actual returns from February 1, 2019, through July 31, 2019. ---------------------------------------------------------------------------------------------- Share Class A C K R Y ---------------------------------------------------------------------------------------------- Beginning Account $1,000.00 $1,000.00 $1,000.00 $1,000.00 $1,000.00 Value on 2/1/19 ---------------------------------------------------------------------------------------------- Ending Account Value $1,004.49 $1,001.54 $1,006.73 $1,001.13 $1,005.61 (after expenses) on 7/31/19 ---------------------------------------------------------------------------------------------- Expenses Paid $4.22 $8.14 $2.79 $7.79 $3.23 During Period* ---------------------------------------------------------------------------------------------- * Expenses are equal to the Fund's annualized expense ratio of 0.85%, 1.64%, 0.56%, 1.57%, and 0.65% for class A, C, K, R, and Y respectively, multiplied by the average account value over the period multiplied by 181/365 (to reflect the partial year period). 18 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/19 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 Multi-Asset Income Fund Based on a hypothetical 5% return per year before expenses, reflecting the period from February 1, 2019, through July 31, 2019. ---------------------------------------------------------------------------------------------- Share Class A C K R Y ---------------------------------------------------------------------------------------------- Beginning Account $1,000.00 $1,000.00 $1,000.00 $1,000.00 $1,000.00 Value on 2/1/19 ---------------------------------------------------------------------------------------------- Ending Account Value $1,020.58 $1,016.66 $1,022.02 $1,017.01 $1,021.57 (after expenses) on 7/31/19 ---------------------------------------------------------------------------------------------- Expenses Paid $4.26 $8.20 $2.81 $7.85 $3.26 During Period* ---------------------------------------------------------------------------------------------- * Expenses are equal to the Fund's annualized expense ratio of 0.85%, 1.64%, 0.56%, 1.57%, and 0.65% for class A, C, K, R, and Y respectively, multiplied by the average account value over the period multiplied by 181/365 (to reflect the partial year period). Pioneer Multi-Asset Income Fund | Annual Report | 7/31/19 19 Schedule of Investments | 7/31/19 --------------------------------------------------------------------------------------------------------------------------- Shares Value --------------------------------------------------------------------------------------------------------------------------- UNAFFILIATED ISSUERS -- 97.5% COMMON STOCKS -- 43.6% of Net Assets Aerospace & Defense -- 0.8% 58,960 Raytheon Co. $ 10,747,818 36,152 Thales SA 4,089,786 -------------- Total Aerospace & Defense $ 14,837,604 --------------------------------------------------------------------------------------------------------------------------- Auto Components -- 0.3% 129,300 Bridgestone Corp. $ 4,874,086 -------------- Total Auto Components $ 4,874,086 --------------------------------------------------------------------------------------------------------------------------- Automobiles -- 0.7% 202,500 Toyota Motor Corp. $ 13,077,369 -------------- Total Automobiles $ 13,077,369 --------------------------------------------------------------------------------------------------------------------------- Banks -- 7.7% 1,161,695 ABN AMRO Bank NV (144A) $ 23,128,834 8,553,969 Abu Dhabi Commercial Bank PJSC 20,959,046 624,078 Bank of America Corp. 19,146,713 303,783 BNP Paribas SA 14,204,480 310,711 FinecoBank Banca Fineco S.p.A. 3,097,193 222,675 Hana Financial Group, Inc. 6,510,855 64,594 JPMorgan Chase & Co. 7,492,904 196,173 KB Financial Group, Inc. 7,163,755 10,262,086 Lloyds Banking Group Plc 6,657,352 1,703,900 Malayan Banking Bhd 3,571,728 3,772,600 Mitsubishi UFJ Financial Group, Inc. 18,182,291 38,845 PNC Financial Services Group, Inc. 5,550,951 -------------- Total Banks $ 135,666,102 --------------------------------------------------------------------------------------------------------------------------- Capital Markets -- 1.9% 189,582 Blackstone Group, Inc. $ 9,096,144 487,617(a) Credit Suisse Group AG 5,905,006 426,954 Morgan Stanley 19,025,070 -------------- Total Capital Markets $ 34,026,220 --------------------------------------------------------------------------------------------------------------------------- Chemicals -- 0.3% 2,117,467 Chevron Lubricants Lanka Plc $ 804,367 374,800 Tokai Carbon Co., Ltd. 3,718,192 -------------- Total Chemicals $ 4,522,559 --------------------------------------------------------------------------------------------------------------------------- Construction & Engineering -- 0.2% 5,308,500 Sinopec Engineering Group Co., Ltd., Class H $ 4,184,460 -------------- Total Construction & Engineering $ 4,184,460 --------------------------------------------------------------------------------------------------------------------------- Consumer Finance -- 0.2% 103,225,500 BFI Finance Indonesia Tbk PT $ 4,381,763 -------------- Total Consumer Finance $ 4,381,763 --------------------------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 20 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/19 --------------------------------------------------------------------------------------------------------------------------- Shares Value --------------------------------------------------------------------------------------------------------------------------- Diversified Telecommunication Services -- 2.2% 898,849 AT&T, Inc. $ 30,605,809 472,789 CenturyLink, Inc. 5,716,019 6,584,800 Telekomunikasi Indonesia Persero Tbk PT 2,020,021 -------------- Total Diversified Telecommunication Services $ 38,341,849 --------------------------------------------------------------------------------------------------------------------------- Electrical Equipment -- 1.7% 1,325,200 Mitsubishi Electric Corp. $ 17,453,675 642,416 Prysmian S.p.A. 13,295,845 -------------- Total Electrical Equipment $ 30,749,520 --------------------------------------------------------------------------------------------------------------------------- Entertainment -- 0.2% 142,637 Viacom, Inc., Class B $ 4,329,033 -------------- Total Entertainment $ 4,329,033 --------------------------------------------------------------------------------------------------------------------------- Equity Real Estate Investment Trusts (REITs) -- 3.3% 162,380 alstria office REIT-AG $ 2,628,093 309,598 CoreCivic, Inc. 5,253,878 67,495 Digital Realty Trust, Inc. 7,718,728 1,654 Invincible Investment Corp. 950,444 230,567 Lar Espana Real Estate Socimi SA 1,781,498 10,697,400 Mapletree Industrial Trust 17,530,974 4,832,130 Mapletree Logistics Trust 5,420,066 1,050,173 Primary Health Properties Plc 1,681,167 55,166 Simon Property Group, Inc. 8,947,925 92,173 Spirit Realty Capital, Inc. 4,066,673 121,168 Wereldhave NV 2,587,018 -------------- Total Equity Real Estate Investment Trusts (REITs) $ 58,566,464 --------------------------------------------------------------------------------------------------------------------------- Food & Staples Retailing -- 0.5% 168,583 Walgreens Boots Alliance, Inc. $ 9,186,088 -------------- Total Food & Staples Retailing $ 9,186,088 --------------------------------------------------------------------------------------------------------------------------- Household Durables -- 0.6% 420,545 Persimmon Plc $ 10,277,481 -------------- Total Household Durables $ 10,277,481 --------------------------------------------------------------------------------------------------------------------------- Insurance -- 3.5% 75,031 Allianz SE $ 17,500,149 83,283 American International Group, Inc. 4,663,015 413,696 AXA SA 10,502,002 1,268,000 Ping An Insurance Group Co. of China, Ltd., Class H 15,130,337 106,708 Progressive Corp. 8,641,214 11,013 Zurich Insurance Group AG 3,841,358 -------------- Total Insurance $ 60,278,075 --------------------------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Multi-Asset Income Fund | Annual Report | 7/31/19 21 Schedule of Investments | 7/31/19 (continued) --------------------------------------------------------------------------------------------------------------------------- Shares Value --------------------------------------------------------------------------------------------------------------------------- Interactive Media & Services -- 0.4% 3,146(a) Alphabet, Inc. $ 3,832,457 3,157(a) Alphabet, Inc., Class C 3,841,059 -------------- Total Interactive Media & Services $ 7,673,516 --------------------------------------------------------------------------------------------------------------------------- IT Services -- 0.4% 104,846 Cognizant Technology Solutions Corp. $ 6,829,669 -------------- Total IT Services $ 6,829,669 --------------------------------------------------------------------------------------------------------------------------- Leisure Products -- 0.3% 5,914,000 Honma Golf, Ltd. (144A) $ 5,273,746 -------------- Total Leisure Products $ 5,273,746 --------------------------------------------------------------------------------------------------------------------------- Machinery -- 0.4% 201,896 ANDRITZ AG $ 7,242,550 -------------- Total Machinery $ 7,242,550 --------------------------------------------------------------------------------------------------------------------------- Marine -- 0.0%+ 156,960 Fjord1 ASA (144A) $ 689,938 -------------- Total Marine $ 689,938 --------------------------------------------------------------------------------------------------------------------------- Media -- 0.4% 726,047 Television Francaise 1 $ 7,283,978 -------------- Total Media $ 7,283,978 --------------------------------------------------------------------------------------------------------------------------- Metals & Mining -- 1.1% 923,690(a) Lynas Corp., Ltd. $ 1,649,008 2,528,295 Magnitogorsk Iron & Steel Works PJSC 1,702,053 159,001 Nucor Corp. 8,646,475 226,963 Severstal PJSC 3,665,866 396,000 Stelco Holdings, Inc. 4,561,728 -------------- Total Metals & Mining $ 20,225,130 --------------------------------------------------------------------------------------------------------------------------- Mortgage Real Estate Investment Trusts (REITs) -- 0.2% 209,483 New Residential Investment Corp. $ 3,286,788 -------------- Total Mortgage Real Estate Investment Trusts (REITs) $ 3,286,788 --------------------------------------------------------------------------------------------------------------------------- Oil, Gas & Consumable Fuels -- 11.0% 1,390,042 BP Plc $ 9,227,332 921,778(a) BW LPG, Ltd. (144A) 4,226,782 57,463 ConocoPhillips 3,394,914 1,644,265 Energy Transfer LP 23,644,531 465,101 Enterprise Products Partners LP 14,004,191 116,000 HollyFrontier Corp. 5,773,320 589,211 MPLX LP 17,293,343 7,389,500 PTT PCL 11,371,238 1,976,844 Rosneft Oil Co. PJSC (G.D.R.) 13,098,568 1,401,588 Royal Dutch Shell Plc 44,242,473 The accompanying notes are an integral part of these financial statements. 22 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/19 --------------------------------------------------------------------------------------------------------------------------- Shares Value --------------------------------------------------------------------------------------------------------------------------- Oil, Gas & Consumable Fuels -- (continued) 597,520 Tallgrass Energy LP $ 11,454,458 599,166 TOTAL SA 31,240,904 172,804 Western Midstream Partners LP 4,665,708 -------------- Total Oil, Gas & Consumable Fuels $ 193,637,762 --------------------------------------------------------------------------------------------------------------------------- Paper & Forest Products -- 0.1% 149,721 Stora Enso OYJ, Class R $ 1,731,931 -------------- Total Paper & Forest Products $ 1,731,931 --------------------------------------------------------------------------------------------------------------------------- Pharmaceuticals -- 1.9% 612,246 GlaxoSmithKline Plc $ 12,680,397 98,925 Novartis AG 9,107,792 291,538 Pfizer, Inc. 11,323,336 -------------- Total Pharmaceuticals $ 33,111,525 --------------------------------------------------------------------------------------------------------------------------- Real Estate Management & Development -- 0.2% 72,304 TAG Immobilien AG $ 1,712,059 589,410(a) Vinhomes JSC (144A) 2,237,640 -------------- Total Real Estate Management & Development $ 3,949,699 --------------------------------------------------------------------------------------------------------------------------- Semiconductors & Semiconductor Equipment -- 0.0%+ 68,000(a) Powertech Technology, Inc. $ 186,828 -------------- Total Semiconductors & Semiconductor Equipment $ 186,828 --------------------------------------------------------------------------------------------------------------------------- Software -- 0.7% 169,519 Micro Focus International Plc $ 3,585,604 67,659 Microsoft Corp. 9,219,892 -------------- Total Software $ 12,805,496 --------------------------------------------------------------------------------------------------------------------------- Technology Hardware, Storage & Peripherals -- 0.2% 57,364 NetApp, Inc. $ 3,355,220 -------------- Total Technology Hardware, Storage & Peripherals $ 3,355,220 --------------------------------------------------------------------------------------------------------------------------- Textiles, Apparel & Luxury Goods -- 0.3% 181,486 Tapestry, Inc. $ 5,613,362 -------------- Total Textiles, Apparel & Luxury Goods $ 5,613,362 --------------------------------------------------------------------------------------------------------------------------- Trading Companies & Distributors -- 0.3% 17,994,300 AKR Corporindo Tbk PT $ 5,134,993 -------------- Total Trading Companies & Distributors $ 5,134,993 --------------------------------------------------------------------------------------------------------------------------- Wireless Telecommunication Services -- 1.6% 654,602 Vodafone Group Plc (A.D.R.) $ 11,861,388 8,548,288 Vodafone Group Plc 15,606,166 -------------- Total Wireless Telecommunication Services $ 27,467,554 --------------------------------------------------------------------------------------------------------------------------- TOTAL COMMON STOCKS (Cost $778,426,614) $ 772,798,358 --------------------------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Multi-Asset Income Fund | Annual Report | 7/31/19 23 Schedule of Investments | 7/31/19 (continued) --------------------------------------------------------------------------------------------------------------------------- Principal Amount USD ($) Value --------------------------------------------------------------------------------------------------------------------------- ASSET BACKED SECURITIES -- 2.5% of Net Assets 700,000 Ascentium Equipment Receivables Trust, Series 2016-2A, Class E, 6.79%, 10/10/24 (144A) $ 714,937 2,240,470 BXG Receivables Note Trust, Series 2018-A, Class C, 4.44%, 2/2/34 (144A) 2,301,458 1,087,547 Commonbond Student Loan Trust, Series 2018-CGS, Class A1, 3.87%, 2/25/46 (144A) 1,124,859 710,553 Drug Royalty III LP 1, Series 2017-1A, Class A2, 3.6%, 4/15/27 (144A) 709,853 3,500,000 Exeter Automobile Receivables Trust, Series 2018-4A, Class C, 3.97%, 9/15/23 (144A) 3,564,036 2,500,000 Four Seas LP, Series 2017-1A, Class A1, 4.95%, 8/28/27 (144A) 2,499,805 816,000 Foursight Capital Automobile Receivables Trust, Series 2018-1, Class B, 3.53%, 4/17/23 (144A) 826,735 29,400(b) GE Mortgage Services LLC, Series 1997-HE1, Class A4, 7.78%, 3/25/27 5,800 2,500,000 Hercules Capital Funding Trust, Series 2018-1A, Class A, 4.605%, 11/22/27 (144A) 2,577,058 2,500,000(c) Home Partners of America Trust, Series 2016-2, Class E, 6.094% (1 Month USD LIBOR + 378 bps), 10/17/33 (144A) 2,509,642 1,100,000(c) Home Partners of America Trust, Series 2017-1, Class E, 4.964% (1 Month USD LIBOR + 265 bps), 7/17/34 (144A) 1,102,012 2,200,000(c) Hunt CRE, Ltd., Series 2017-FL1, Class A, 3.325% (1 Month USD LIBOR + 100 bps), 8/15/34 (144A) 2,190,281 5,000,000(b) Mill City Mortgage Loan Trust, Series 2018-4, Class A1B, 3.5%, 4/25/66 (144A) 5,047,209 1,677,000 Navitas Equipment Receivables LLC, Series 2016-1, Class C, 5.05%, 12/15/21 (144A) 1,685,156 899,057(c) Newtek Small Business Loan Trust, Series 2018-1, Class A, 4.104% (1 Month USD LIBOR + 170 bps), 2/25/44 (144A) 899,056 899,057(c) Newtek Small Business Loan Trust, Series 2018-1, Class B, 5.404% (1 Month USD LIBOR + 300 bps), 2/25/44 (144A) 899,054 2,000,000 Progress Residential Trust, Series 2017-SFR1, Class D, 3.565%, 8/17/34 (144A) 2,018,661 5,000,000 Purchasing Power Funding LLC, Series 2018-A, Class A, 3.34%, 8/15/22 (144A) 5,006,882 500,000 Rosy, Series 2018-1, Class A1, 6.25%, 12/15/25 (144A) 502,500 482,750 Skopos Auto Receivables Trust, Series 2018-1A, Class A, 3.19%, 9/15/21 (144A) 482,945 603,854 SoFi Consumer Loan Program LLC, Series 2016-4, Class A, 3.18%, 11/25/25 (144A) 606,495 1,713,343 Tidewater Auto Receivables Trust, Series 2018-AA, Class A2, 3.12%, 7/15/22 (144A) 1,715,879 The accompanying notes are an integral part of these financial statements. 24 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/19 --------------------------------------------------------------------------------------------------------------------------- Principal Amount USD ($) Value --------------------------------------------------------------------------------------------------------------------------- ASSET BACKED SECURITIES -- (continued) 1,750,000 Tricon American Homes Trust, Series 2017-SFR1, Class F, 5.151%, 9/17/34 (144A) $ 1,796,182 584,905 Westgate Resorts LLC, Series 2017-1A, Class B, 4.05%, 12/20/30 (144A) 587,954 2,000,000 Westlake Automobile Receivables Trust, Series 2016-2A, Class E, 6.41%, 5/15/23 (144A) 2,007,658 --------------------------------------------------------------------------------------------------------------------------- TOTAL ASSET BACKED SECURITIES (Cost $43,041,796) $ 43,382,107 --------------------------------------------------------------------------------------------------------------------------- COLLATERALIZED MORTGAGE OBLIGATIONS -- 4.8% of Net Assets 4,500,000(c) Bellemeade Re, Ltd., Series 2018-1A, Class M1B, 3.866% (1 Month USD LIBOR + 160 bps), 4/25/28 (144A) $ 4,511,583 1,786,672(c) BX Commercial Mortgage Trust, Series 2018-IND, Class D, 3.625% (1 Month USD LIBOR + 130 bps), 11/15/35 (144A) 1,787,792 1,700,000(c) BX Trust, Series 2017-APPL, Class B, 3.475% (1 Month USD LIBOR + 115 bps), 7/15/34 (144A) 1,700,513 6,375,000(c) BX Trust, Series 2017-SLCT, Class B, 3.525% (1 Month USD LIBOR + 120 bps), 7/15/34 (144A) 6,376,932 1,812,112(b) Cascade Funding Mortgage Trust, Series 2018-RM2, Class A, 4.0%, 10/25/68 (144A) 1,857,483 2,800,000(c) CGDBB Commercial Mortgage Trust, Series 2017-BIOC, Class B, 3.295% (1 Month USD LIBOR + 97 bps), 7/15/32 (144A) 2,801,118 5,000,000(c) Connecticut Avenue Securities Trust, Series 2019-R01, Class 2M2, 4.716% (1 Month USD LIBOR + 245 bps), 7/25/31 (144A) 5,072,601 2,450,000(c) Connecticut Avenue Securities Trust, Series 2019-R02, Class 1M2, 4.566% (1 Month USD LIBOR + 230 bps), 8/25/31 (144A) 2,468,714 1,470,000(c) Connecticut Avenue Securities Trust, Series 2019-R03, Class 1B1, 6.366% (1 Month USD LIBOR + 410 bps), 9/25/31 (144A) 1,576,713 3,090,000(c) Connecticut Avenue Securities Trust, Series 2019-R04, Class 2B1, 7.516% (1 Month USD LIBOR + 525 bps), 6/25/39 (144A) 3,295,074 2,080,000(c) Eagle Re, Ltd., Series 2018-1, Class M1, 3.966% (1 Month USD LIBOR + 170 bps), 11/25/28 (144A) 2,077,629 2,700,000(c) Eagle Re, Ltd., Series 2019-1, Class B1, 6.766% (1 Month USD LIBOR + 450 bps), 4/25/29 (144A) 2,699,985 2,000,000(c) Fannie Mae Connecticut Avenue Securities, Series 2018-C04, Class 2M2, 4.816% (1 Month USD LIBOR + 255 bps), 12/25/30 2,040,370 2,700,000(c) Freddie Mac Stacr Trust, Series 2019-DNA1, Class B2, 13.154% (1 Month USD LIBOR + 1,075 bps), 1/25/49 (144A) 3,228,142 2,790,000(c) Freddie Mac Stacr Trust, Series 2019-DNA2, Class B2, 12.766% (1 Month USD LIBOR + 1,050 bps), 3/25/49 (144A) 3,268,393 The accompanying notes are an integral part of these financial statements. Pioneer Multi-Asset Income Fund | Annual Report | 7/31/19 25 Schedule of Investments | 7/31/19 (continued) --------------------------------------------------------------------------------------------------------------------------- Principal Amount USD ($) Value --------------------------------------------------------------------------------------------------------------------------- COLLATERALIZED MORTGAGE OBLIGATIONS -- (continued) 1,000,000(c) Freddie Mac Stacr Trust, Series 2019-HQA1, Class B2, 14.516% (1 Month USD LIBOR + 1,225 bps), 2/25/49 (144A) $ 1,215,388 3,000,000(c) Freddie Mac Stacr Trust, Series 2019-HQA1, Class M2, 4.616% (1 Month USD LIBOR + 235 bps), 2/25/49 (144A) 3,029,807 1,000,000(c) Freddie Mac Stacr Trust, Series 2019-HQA2, Class B2, 13.516% (1 Month USD LIBOR + 1,125 bps), 4/25/49 (144A) 1,156,999 5,000,000(b) FREMF Mortgage Trust, Series 2014-K716, Class B, 3.948%, 8/25/47 (144A) 5,127,689 24,505 Global Mortgage Securitization, Ltd., Series 2004-A, Class B1, 5.25%, 11/25/32 (144A) 16,483 180,544 Global Mortgage Securitization, Ltd., Series 2004-A, Class B2, 5.25%, 11/25/32 (144A) 29,184 210,000(b) GMAT Trust, Series 2013-1A, Class M, 5.0%, 11/25/43 (144A) 125,571 4,000,000(b) GS Mortgage Securities Corp. Trust, Series 2016-RENT, Class C, 4.067%, 2/10/29 (144A) 4,043,559 1,000,000(c) GS Mortgage Securities Corp. Trust, Series 2017-STAY, Class B, 3.425% (1 Month USD LIBOR + 110 bps), 7/15/32 (144A) 984,019 2,930,000(c) GS Mortgage Securities Trust, Series 2018-HART, Class B, 3.625% (1 Month USD LIBOR + 130 bps), 10/15/31 (144A) 2,933,134 1,040,000(c) Home Re, Ltd., Series 2018-1, Class M1, 3.866% (1 Month USD LIBOR + 160 bps), 10/25/28 (144A) 1,038,385 2,595,185(b) JP Morgan Mortgage Trust, Series 2017-4, Class A6, 3.0%, 11/25/48 (144A) 2,612,947 2,857,525(c) Oaktown Re II, Ltd., Series 2018-1A, Class M1, 3.816% (1 Month USD LIBOR + 155 bps), 7/25/28 (144A) 2,860,084 3,000,000 OBP Depositor LLC Trust, Series 2010-OBP, Class A, 4.646%, 7/15/45 (144A) 3,024,211 2,960,494(c) Radnor Re, Ltd., Series 2018-1, Class M1, 3.666% (1 Month USD LIBOR + 140 bps), 3/25/28 (144A) 2,967,618 2,634,871 ReadyCap Commercial Mortgage Trust, Series 2018-4, Class A, 3.39%, 2/27/51 (144A) 2,609,243 1,020,072(b) Sutherland Commercial Mortgage Loans, Series 2017-SBC6, Class A, 3.192%, 5/25/37 (144A) 1,010,413 4,050,401(c) Tharaldson Hotel Portfolio Trust, Series 2018-THL, Class B, 3.464% (1 Month USD LIBOR + 110 bps), 11/11/34 (144A) 4,054,134 1,344,419(b) Verus Securitization Trust, Series 2017-1A, Class A3, 3.716%, 1/25/47 (144A) 1,353,890 --------------------------------------------------------------------------------------------------------------------------- TOTAL COLLATERALIZED MORTGAGE OBLIGATIONS (Cost $83,490,942) $ 84,955,800 --------------------------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 26 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/19 --------------------------------------------------------------------------------------------------------------------------- Principal Amount USD ($) Value --------------------------------------------------------------------------------------------------------------------------- CORPORATE BONDS -- 18.7% of Net Assets Advertising -- 0.2% 3,444,000 MDC Partners, Inc., 6.5%, 5/1/24 (144A) $ 3,108,210 -------------- Total Advertising $ 3,108,210 --------------------------------------------------------------------------------------------------------------------------- Aerospace & Defense -- 0.2% 915,000 Bombardier, Inc., 7.5%, 3/15/25 (144A) $ 930,441 3,372,000 Bombardier, Inc., 7.875%, 4/15/27 (144A) 3,414,150 -------------- Total Aerospace & Defense $ 4,344,591 --------------------------------------------------------------------------------------------------------------------------- Auto Parts & Equipment -- 0.5% 5,468,000 American Axle & Manufacturing, Inc., 6.25%, 3/15/26 $ 5,447,495 2,884,000 Titan International, Inc., 6.5%, 11/30/23 2,516,290 -------------- Total Auto Parts & Equipment $ 7,963,785 --------------------------------------------------------------------------------------------------------------------------- Banks -- 2.5% 2,614,000 Freedom Mortgage Corp., 8.25%, 4/15/25 (144A) $ 2,280,715 8,650,000(b)(d) ING Groep NV, 6.5% (5 Year USD Swap Rate + 445 bps) 9,056,550 8,676,000(b)(d) Lloyds Banking Group Plc, 7.5% (5 Year USD Swap Rate + 450 bps) 9,083,772 2,920,000 Provident Funding Associates LP/PFG Finance Corp., 6.375%, 6/15/25 (144A) 2,817,800 8,125,000(b)(d) Royal Bank of Scotland Group Plc, 8.0% (5 Year USD Swap Rate + 572 bps) 8,703,906 2,350,000(b)(d) Royal Bank of Scotland Group Plc, 8.625% (5 Year USD Swap Rate + 760 bps) 2,499,813 8,600,000(b)(d) UBS Group Funding Switzerland AG, 7.0% (5 Year USD Swap Rate + 434 bps) (144A) 9,073,000 -------------- Total Banks $ 43,515,556 --------------------------------------------------------------------------------------------------------------------------- Building Materials -- 0.5% 2,661,000 American Woodmark Corp., 4.875%, 3/15/26 (144A) $ 2,634,390 1,510,000 Builders FirstSource, Inc., 5.625%, 9/1/24 (144A) 1,562,850 1,689,000 Builders FirstSource, Inc., 6.75%, 6/1/27 (144A) 1,777,672 2,627,000 Summit Material LLC/Summit Materials Finance Corp., 6.5%, 3/15/27 (144A) 2,778,053 -------------- Total Building Materials $ 8,752,965 --------------------------------------------------------------------------------------------------------------------------- Chemicals -- 1.1% 4,008,000 CF Industries, Inc., 5.375%, 3/15/44 $ 3,767,520 4,769,000 Chemours Co., 7.0%, 5/15/25 4,677,757 2,660,000 Hexion, Inc., 7.875%, 7/15/27 (144A) 2,633,400 2,000,000 Kraton Polymers LLC/Kraton Polymers Capital Corp., 7.0%, 4/15/25 (144A) 2,030,000 2,312,000 OCI NV, 6.625%, 4/15/23 (144A) 2,404,480 2,736,000 Trinseo Materials Operating SCA/Trinseo Materials Finance, Inc., 5.375%, 9/1/25 (144A) 2,588,940 The accompanying notes are an integral part of these financial statements. Pioneer Multi-Asset Income Fund | Annual Report | 7/31/19 27 Schedule of Investments | 7/31/19 (continued) --------------------------------------------------------------------------------------------------------------------------- Principal Amount USD ($) Value --------------------------------------------------------------------------------------------------------------------------- Chemicals -- (continued) 1,643,000 Tronox, Inc., 6.5%, 4/15/26 (144A) $ 1,573,337 -------------- Total Chemicals $ 19,675,434 --------------------------------------------------------------------------------------------------------------------------- Coal -- 0.2% 4,190,000 SunCoke Energy Partners LP/SunCoke Energy Partners Finance Corp., 7.5%, 6/15/25 (144A) $ 4,153,128 -------------- Total Coal $ 4,153,128 --------------------------------------------------------------------------------------------------------------------------- Commercial Services -- 0.7% 2,642,000 Cardtronics, Inc./Cardtronics USA, Inc., 5.5%, 5/1/25 (144A) $ 2,618,882 2,348,000 Carriage Services, Inc., 6.625%, 6/1/26 (144A) 2,406,700 3,582,000 Garda World Security Corp., 8.75%, 5/15/25 (144A) 3,662,595 3,746,000 Verscend Escrow Corp., 9.75%, 8/15/26 (144A) 3,993,348 -------------- Total Commercial Services $ 12,681,525 --------------------------------------------------------------------------------------------------------------------------- Diversified Financial Services -- 0.2% 1,915,000 Nationstar Mortgage LLC/Nationstar Capital Corp., 6.5%, 7/1/21 $ 1,909,485 1,605,000 Nationstar Mortgage LLC/Nationstar Capital Corp., 6.5%, 6/1/22 1,596,975 -------------- Total Diversified Financial Services $ 3,506,460 --------------------------------------------------------------------------------------------------------------------------- Electric -- 0.2% 2,568,000 Clearway Energy Operating LLC, 5.75%, 10/15/25 (144A) $ 2,663,530 1,079,000 Talen Energy Supply LLC, 7.25%, 5/15/27 (144A) 1,065,102 -------------- Total Electric $ 3,728,632 --------------------------------------------------------------------------------------------------------------------------- Electrical Components & Equipment -- 0.0%+ 240,000 Energizer Holdings, Inc., 6.375%, 7/15/26 (144A) $ 250,200 -------------- Total Electrical Components & Equipment $ 250,200 --------------------------------------------------------------------------------------------------------------------------- Entertainment -- 0.8% 2,621,000 Caesars Resort Collection LLC/CRC Finco, Inc., 5.25%, 10/15/25 (144A) $ 2,615,234 3,419,000 Enterprise Development Authority, 12.0%, 7/15/24 (144A) 3,803,637 1,505,000 International Game Technology Plc, 6.25%, 1/15/27 (144A) 1,632,925 4,396,000 Scientific Games International, Inc., 8.25%, 3/15/26 (144A) 4,704,951 1,678,000 Scientific Games International, Inc., 10.0%, 12/1/22 1,749,349 -------------- Total Entertainment $ 14,506,096 --------------------------------------------------------------------------------------------------------------------------- Environmental Control -- 0.6% 4,375,000 GFL Environmental, Inc., 5.375%, 3/1/23 (144A) $ 4,435,156 2,530,000 GFL Environmental, Inc., 8.5%, 5/1/27 (144A) 2,770,350 3,342,000 Tervita Corp., 7.625%, 12/1/21 (144A) 3,408,840 -------------- Total Environmental Control $ 10,614,346 --------------------------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 28 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/19 --------------------------------------------------------------------------------------------------------------------------- Principal Amount USD ($) Value --------------------------------------------------------------------------------------------------------------------------- Food -- 0.6% 1,954,000 FAGE International SA/FAGE USA Dairy Industry, Inc., 5.625%, 8/15/26 (144A) $ 1,699,980 1,850,000 JBS USA LUX SA/JBS USA Finance, Inc., 6.75%, 2/15/28 (144A) 1,994,300 1,760,000 JBS USA LUX SA/JBS USA Food Co./JBS USA Finance, Inc., 5.5%, 1/15/30 (144A) 1,760,000 3,859,000 Simmons Foods, Inc., 5.75%, 11/1/24 (144A) 3,530,985 920,000 Simmons Foods, Inc., 7.75%, 1/15/24 (144A) 989,000 -------------- Total Food $ 9,974,265 --------------------------------------------------------------------------------------------------------------------------- Forest Products & Paper -- 0.2% 4,236,000 Schweitzer-Mauduit International, Inc., 6.875%, 10/1/26 (144A) $ 4,331,310 -------------- Total Forest Products & Paper $ 4,331,310 --------------------------------------------------------------------------------------------------------------------------- Healthcare-Services -- 0.5% 2,930,000 BCPE Cycle Merger Sub II, Inc., 10.625%, 7/15/27 (144A) $ 2,893,961 1,262,000 RegionalCare Hospital Partners Holdings, Inc., 8.25%, 5/1/23 (144A) 1,343,651 4,350,000 Surgery Centre Holdings, Inc., 10.0%, 4/15/27 (144A) 4,295,625 -------------- Total Healthcare-Services $ 8,533,237 --------------------------------------------------------------------------------------------------------------------------- Holding Companies-Diversified -- 0.2% 2,710,000 VistaJet Malta Finance Plc/XO Management Holding, Inc., 10.5%, 6/1/24 (144A) $ 2,682,900 -------------- Total Holding Companies-Diversified $ 2,682,900 --------------------------------------------------------------------------------------------------------------------------- Home Builders -- 0.7% 3,921,000 Beazer Homes USA, Inc., 5.875%, 10/15/27 $ 3,587,715 500,000 Beazer Homes USA, Inc., 8.75%, 3/15/22 517,910 4,258,000 KB Home, 7.625%, 5/15/23 4,747,670 2,810,000 Lennar Corp., 4.75%, 11/29/27 2,950,500 -------------- Total Home Builders $ 11,803,795 --------------------------------------------------------------------------------------------------------------------------- Home Furnishings -- 0.1% 1,483,000 Tempur Sealy International, Inc., 5.5%, 6/15/26 $ 1,555,311 -------------- Total Home Furnishings $ 1,555,311 --------------------------------------------------------------------------------------------------------------------------- Insurance -- 0.0%+ 750,000(c) Spectrum Capital, Ltd., 7.994% (6 Month USD LIBOR + 575 bps), 6/8/21 (144A) $ 725,775 -------------- Total Insurance $ 725,775 --------------------------------------------------------------------------------------------------------------------------- Iron/Steel -- 0.2% 3,397,000 Commercial Metals Co., 5.375%, 7/15/27 $ 3,413,985 -------------- Total Iron/Steel $ 3,413,985 --------------------------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Multi-Asset Income Fund | Annual Report | 7/31/19 29 Schedule of Investments | 7/31/19 (continued) --------------------------------------------------------------------------------------------------------------------------- Principal Amount USD ($) Value --------------------------------------------------------------------------------------------------------------------------- Machinery-Diversified -- 0.2% 2,886,000 Cloud Crane LLC, 10.125%, 8/1/24 (144A) $ 3,088,020 -------------- Total Machinery-Diversified $ 3,088,020 --------------------------------------------------------------------------------------------------------------------------- Media -- 0.4% 2,671,000 Clear Channel Worldwide Holdings, Inc., 9.25%, 2/15/24 (144A) $ 2,898,035 4,010,000 Gray Television, Inc., 5.875%, 7/15/26 (144A) 4,160,375 445,000 Sinclair Television Group, Inc., 5.875%, 3/15/26 (144A) 462,377 -------------- Total Media $ 7,520,787 --------------------------------------------------------------------------------------------------------------------------- Mining -- 0.3% 1,908,000 First Quantum Minerals, Ltd., 6.875%, 3/1/26 (144A) $ 1,803,060 2,379,000 Hudbay Minerals, Inc., 7.25%, 1/15/23 (144A) 2,447,396 1,265,000 Hudbay Minerals, Inc., 7.625%, 1/15/25 (144A) 1,310,882 530,000 Joseph T Ryerson & Son, Inc., 11.0%, 5/15/22 (144A) 559,892 -------------- Total Mining $ 6,121,230 --------------------------------------------------------------------------------------------------------------------------- Oil & Gas -- 0.9% 765,000 Chesapeake Energy Corp., 8.0%, 1/15/25 $ 654,075 2,529,000 Great Western Petroleum LLC/Great Western Finance Corp., 9.0%, 9/30/21 (144A) 2,187,585 2,523,000 Gulfport Energy Corp., 6.0%, 10/15/24 1,942,458 305,000 MEG Energy Corp., 7.0%, 3/31/24 (144A) 291,208 2,355,000 Oasis Petroleum, Inc., 6.875%, 3/15/22 2,344,049 1,515,000 PBF Holding Co. LLC/PBF Finance Corp., 7.0%, 11/15/23 1,572,267 3,231,000 Shelf Drilling Holdings, Ltd., 8.25%, 2/15/25 (144A) 2,972,520 2,414,000 SM Energy Co., 6.125%, 11/15/22 2,359,685 1,950,000 Trinidad Petroleum Holdings Ltd., 9.75%, 8/14/19 (144A) 1,950,000 ARS 22,000,000 YPF SA, 16.5%, 5/9/22 (144A) 303,872 -------------- Total Oil & Gas $ 16,577,719 --------------------------------------------------------------------------------------------------------------------------- Oil & Gas Services -- 0.3% 860,000 Archrock Partners LP/Archrock Partners Finance Corp., 6.0%, 10/1/22 $ 871,825 1,711,000 Archrock Partners LP/Archrock Partners Finance Corp., 6.875%, 4/1/27 (144A) 1,800,827 3,449,000 FTS International, Inc., 6.25%, 5/1/22 3,069,610 -------------- Total Oil & Gas Services $ 5,742,262 --------------------------------------------------------------------------------------------------------------------------- Packaging & Containers -- 0.4% EUR 2,780,000(e) ARD Finance SA, 6.625% (7.375% PIK 0.0% cash), 9/15/23 $ 3,189,631 350,000(e) ARD Finance SA, 7.125% (7.875% PIK 0.0% cash), 9/15/23 360,500 2,350,000 Sealed Air Corp., 6.875%, 7/15/33 (144A) 2,608,500 -------------- Total Packaging & Containers $ 6,158,631 --------------------------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 30 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/19 --------------------------------------------------------------------------------------------------------------------------- Principal Amount USD ($) Value --------------------------------------------------------------------------------------------------------------------------- Pharmaceuticals -- 0.6% 665,000 Bausch Health Cos., Inc., 5.875%, 5/15/23 (144A) $ 669,788 989,000 Bausch Health Cos., Inc., 7.0%, 1/15/28 (144A) 1,024,851 2,554,000 Bausch Health Cos., Inc., 7.25%, 5/30/29 (144A) 2,654,577 3,301,000 BioScrip, Inc., 8.875%, 2/15/21 3,358,768 1,094,000 Horizon Pharma USA, Inc., 6.625%, 5/1/23 1,130,540 245,000 Horizon Pharma USA, Inc., 8.75%, 11/1/24 (144A) 264,502 1,845,000 Par Pharmaceutical, Inc., 7.5%, 4/1/27 (144A) 1,674,337 -------------- Total Pharmaceuticals $ 10,777,363 --------------------------------------------------------------------------------------------------------------------------- Pipelines -- 1.0% 3,619,000 American Midstream Partners LP/American Midstream Finance Corp., 9.5%, 12/15/21 (144A) $ 3,510,430 2,200,000 Delek Logistics Partners LP/Delek Logistics Finance Corp., 6.75%, 5/15/25 2,205,500 458,000 EnLink Midstream Partners LP, 5.05%, 4/1/45 384,720 3,328,000 EnLink Midstream Partners LP, 5.6%, 4/1/44 2,878,720 3,617,000 Genesis Energy LP/Genesis Energy Finance Corp., 6.25%, 5/15/26 3,567,266 1,570,000 Global Partners LP/GLP Finance Corp., 7.0%, 6/15/23 1,609,250 400,000 Global Partners LP/GLP Finance Corp., 7.0%, 8/1/27 (144A) 401,000 650,000 ONEOK, Inc., 7.5%, 9/1/23 758,807 690,000 PBF Logistics LP/PBF Logistics Finance Corp., 6.875%, 5/15/23 707,250 1,115,000 Sabine Pass Liquefaction LLC, 5.75%, 5/15/24 1,236,949 722,000 Sabine Pass Liquefaction LLC, 5.875%, 6/30/26 823,268 -------------- Total Pipelines $ 18,083,160 --------------------------------------------------------------------------------------------------------------------------- Retail -- 0.2% 3,180,000 AAG FH LP/AAG FH Finco, Inc., 9.75%, 7/15/24 (144A) $ 2,949,450 -------------- Total Retail $ 2,949,450 --------------------------------------------------------------------------------------------------------------------------- Semiconductors -- 0.3% 4,620,000 Micron Technology, Inc., 5.5%, 2/1/25 $ 4,746,636 -------------- Total Semiconductors $ 4,746,636 --------------------------------------------------------------------------------------------------------------------------- Telecommunications -- 3.9% 34,788,000 CenturyLink, Inc., 7.6%, 9/15/39 $ 32,439,810 36,502,000 CenturyLink, Inc., 7.65%, 3/15/42 34,038,115 3,389,000 CommScope, Inc., 8.25%, 3/1/27 (144A) 3,338,165 -------------- Total Telecommunications $ 69,816,090 --------------------------------------------------------------------------------------------------------------------------- TOTAL CORPORATE BONDS (Cost $321,482,275) $ 331,402,854 --------------------------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Multi-Asset Income Fund | Annual Report | 7/31/19 31 Schedule of Investments | 7/31/19 (continued) --------------------------------------------------------------------------------------------------------------------------- Principal Amount USD ($) Value --------------------------------------------------------------------------------------------------------------------------- FOREIGN GOVERNMENT BONDS -- 4.2% of Net Assets Egypt -- 0.5% EGP 167,150,000 Egypt Treasury Bills, 17.646%, 2/4/20 $ 9,264,275 -------------- Total Egypt $ 9,264,275 --------------------------------------------------------------------------------------------------------------------------- Indonesia -- 3.7% IDR 291,235,000,000 Indonesia Treasury Bond, 8.375%, 3/15/24 $ 22,095,796 IDR 314,121,000,000 Indonesia Treasury Bond, 8.75%, 5/15/31 24,518,111 IDR 236,353,000,000 Indonesia Treasury Bond, 9.0%, 3/15/29 18,609,448 -------------- Total Indonesia $ 65,223,355 --------------------------------------------------------------------------------------------------------------------------- TOTAL FOREIGN GOVERNMENT BONDS (Cost $70,422,645) $ 74,487,630 --------------------------------------------------------------------------------------------------------------------------- INSURANCE-LINKED SECURITIES -- 2.1% of Net Assets(f) Catastrophe Linked Bonds -- 1.0% Earthquakes -- California -- 0.0%+ 250,000(c) Ursa Re, 5.539% (3 Month U.S. Treasury Bill + 350 bps), 5/27/20 (144A) $ 247,775 --------------------------------------------------------------------------------------------------------------------------- Earthquakes -- Japan -- 0.1% 500,000(c) Kizuna Re II, 3.921% (3 Month U.S. Treasury Bill + 188 bps), 4/11/23 (144A) $ 494,500 500,000(c) Kizuna Re II, 4.546% (3 Month U.S. Treasury Bill + 250 bps), 4/11/23 (144A) 493,650 250,000(c) Nakama Re, 4.029% (6 Month USD LIBOR + 220 bps), 10/13/21 (144A) 248,525 -------------- $ 1,236,675 --------------------------------------------------------------------------------------------------------------------------- Earthquakes -- U.S. -- 0.0%+ 400,000(c) Acorn Re, 4.872% (3 Month USD LIBOR + 275 bps), 11/10/21 (144A) $ 395,600 --------------------------------------------------------------------------------------------------------------------------- Earthquakes -- U.S. Regional -- 0.0%+ 500,000(c) Merna Re, 4.046% (3 Month U.S. Treasury Bill + 200 bps), 4/8/21 (144A) $ 497,550 --------------------------------------------------------------------------------------------------------------------------- Flood -- U.S. -- 0.0%+ 250,000(c) FloodSmart Re, 13.294% (3 Month U.S. Treasury Bill + 1,125 bps), 3/7/22 (144A) $ 248,800 --------------------------------------------------------------------------------------------------------------------------- Multiperil -- U.S. -- 0.3% 750,000(c) Bowline Re, 6.557% (3 Month U.S. Treasury Bill + 450 bps), 5/23/22 (144A) $ 728,625 750,000(c) Kilimanjaro Re, 7.029% (3 Month USD LIBOR + 494 bps), 5/6/22 (144A) 722,775 250,000(c) Kilimanjaro Re, 8.796% (3 Month U.S. Treasury Bill + 675 bps), 12/6/19 (144A) 247,250 1,100,000(c) Kilimanjaro II Re, 7.633% (6 Month USD LIBOR + 630 bps), 4/20/21 (144A) 1,088,120 The accompanying notes are an integral part of these financial statements. 32 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/19 --------------------------------------------------------------------------------------------------------------------------- Principal Amount USD ($) Value --------------------------------------------------------------------------------------------------------------------------- Multiperil -- U.S. -- (continued) 250,000(c) Kilimanjaro II Re, 8.233% (6 Month USD LIBOR + 630 bps), 4/21/22 (144A) $ 247,375 750,000(c) Kilimanjaro II Re, 9.823% (6 Month USD LIBOR + 791 bps), 4/20/21 (144A) 740,250 250,000(c) Residential Reinsurance 2017, 7.804% (3 Month U.S. Treasury Bill + 576 bps), 12/6/21 (144A) 244,275 750,000(c) Sanders Re, 4.87% (6 Month USD LIBOR + 299 bps), 12/6/21 (144A) 730,875 -------------- $ 4,749,545 --------------------------------------------------------------------------------------------------------------------------- Multiperil -- U.S. Regional -- 0.1% 750,000(c) Long Point Re III, 4.796% (3 Month U.S. Treasury Bill + 275 bps), 6/1/22 (144A) $ 741,750 --------------------------------------------------------------------------------------------------------------------------- Multiperil -- Worldwide -- 0.2% 700,000(c) Galilei Re, 8.641% (6 Month USD LIBOR + 678 bps), 1/8/20 (144A) $ 691,810 550,000(c) Galilei Re, 8.661% (6 Month USD LIBOR + 678 bps), 1/8/21 (144A) 545,600 500,000(c) Galilei Re, 10.491% (6 Month USD LIBOR + 863 bps), 1/8/20 (144A) 493,250 250,000(c) Galilei Re, 15.721% (6 Month USD LIBOR + 1,386 bps), 1/8/20 (144A) 247,000 750,000(c) Kendall Re, 7.655% (3 Month USD LIBOR + 525 bps), 5/6/21 (144A) 721,350 -------------- $ 2,699,010 --------------------------------------------------------------------------------------------------------------------------- Pandemic -- Worldwide -- 0.0%+ 250,000(c) International Bank for Reconstruction & Development, 1.812% (6 Month USD LIBOR + 690 bps), 7/15/20 (144A) $ 250,650 --------------------------------------------------------------------------------------------------------------------------- Windstorm -- Florida -- 0.1% 500,000(c) Integrity Re, 5.137% (6 Month USD LIBOR + 328 bps), 6/10/20 (144A) $ 479,900 250,000(c) Integrity Re, 6.068% (3 Month USD LIBOR + 401 bps), 6/10/22 (144A) 249,125 500,000(c) Sanders Re, 5.442% (6 Month USD LIBOR + 314 bps), 6/5/20 (144A) 493,500 -------------- $ 1,222,525 --------------------------------------------------------------------------------------------------------------------------- Windstorm -- Massachusetts -- 0.1% 1,500,000(c) Cranberry Re, 3.793% (6 Month USD LIBOR + 198 bps), 7/13/20 (144A) $ 1,489,500 --------------------------------------------------------------------------------------------------------------------------- Windstorm -- Texas -- 0.1% 1,000,000(c) Alamo Re, 5.537% (1 Month U.S. Treasury Bill + 348 bps), 6/7/21 (144A) $ 977,700 500,000(c) Alamo Re, 5.867% (3 Month U.S. Treasury Bill + 381 bps), 6/8/20 (144A) 498,500 -------------- $ 1,476,200 -------------- Total Catastrophe Linked Bonds $ 15,255,580 --------------------------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Multi-Asset Income Fund | Annual Report | 7/31/19 33 Schedule of Investments | 7/31/19 (continued) --------------------------------------------------------------------------------------------------------------------------- Face Amount USD ($) Value --------------------------------------------------------------------------------------------------------------------------- Collateralized Reinsurance -- 0.0%+ Multiperil -- U.S. -- 0.0%+ 300,000+(a)(g) Dingle Re 2019, 2/1/20 $ 283,278 --------------------------------------------------------------------------------------------------------------------------- Multiperil -- U.S. Regional -- 0.0%+ 250,000+(a)(g) Ocean View Re 2019, 6/30/20 $ 240,716 --------------------------------------------------------------------------------------------------------------------------- Multiperil -- Worldwide -- 0.0%+ 700,000+(a)(g) Cypress Re 2017, 1/10/20 $ 12,740 12,000+(g) Limestone Re 2016-1, 8/31/21 29,413 12,000+(g) Limestone Re 2016-1, 8/31/21 29,413 700,000+(a)(g) Resilience Re, 5/1/20 490 300,000+(a)(g) Walton Health Re 2019, 6/30/20 233,724 -------------- $ 305,780 --------------------------------------------------------------------------------------------------------------------------- Windstorm -- U.S. Regional -- 0.0%+ 250,000+(a)(g) Oakmont Re 2017, 4/15/20 $ 7,350 -------------- Total Collateralized Reinsurance $ 837,124 --------------------------------------------------------------------------------------------------------------------------- Industry Loss Warranties -- 0.0%+ Multiperil -- U.S. -- 0.0%+ 250,000+(a)(g) Cypress Re 2019, 1/31/20 $ 238,820 -------------- Total Industry Loss Warranties $ 238,820 --------------------------------------------------------------------------------------------------------------------------- Reinsurance Sidecars -- 1.1% Multiperil -- U.S. -- 0.1% 700,000+(a)(g) Carnoustie Re 2015, 7/31/20 $ 2,240 700,000+(a)(g) Carnoustie Re 2016, 11/30/20 18,900 1,500,000+(a)(g) Carnoustie Re 2017, 11/30/21 381,300 1,500,000+(a)(h) Harambee Re 2019, 12/31/22 1,541,400 -------------- $ 1,943,840 --------------------------------------------------------------------------------------------------------------------------- Multiperil -- Worldwide -- 1.0% 1,000,000+(a)(g) Alturas Re 2019-2, 3/10/22 $ 1,024,000 600,000+(a)(g) Alturas Re 2019-2, 3/10/23 632,040 1,000,000+(a)(g) Arlington Re 2015, 2/1/20 48,600 750,000+(a)(g) Bantry Re 2019, 12/31/22 770,530 900,000+(a)(g) Berwick Re 2017-1, 2/1/20 29,790 46,259+(g) Berwick Re 2018-1, 12/31/21 7,388 1,500,000+(a)(g) Berwick Re 2019-1, 12/31/22 1,563,355 750,000+(a)(g) Gleneagles Re 2019, 12/31/22 779,501 1,500,000+(a)(g) Eden Re II, 3/22/23 (144A) 1,618,350 648,000+(a)(g) Limestone Re 2019-A, 9/9/22 675,670 476,000+(a)(g) Limestone Re 2019-B, 9/9/22 496,325 1,250,000+(a)(h) NCM Re 2019, 12/31/22 1,327,875 1,200,000+(g) Pangaea Re 2015-1, 2/1/20 1,560 The accompanying notes are an integral part of these financial statements. 34 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/19 --------------------------------------------------------------------------------------------------------------------------- Face Amount USD ($) Value --------------------------------------------------------------------------------------------------------------------------- Multiperil -- Worldwide -- (continued) 2,000,000+(g) Pangaea Re 2015-2, 11/30/19 $ 1,800 1,200,000+(g) Pangaea Re 2016-1, 11/30/20 3,960 1,500,000+(g) Pangaea Re 2017-1, 11/30/21 24,150 1,250,000+(a)(g) Pangaea Re 2019-1, 2/1/23 1,283,375 500,000+(a)(g) Sector Re V, Series 9, Class A, 3/1/24 (144A) 519,866 1,000,000+(a)(g) St. Andrews Re 2017-1, 2/1/20 67,800 608,294+(a)(g) St. Andrews Re 2017-4, 6/1/20 59,856 1,500,000+(a)(h) Thopas Re 2019, 12/31/22 1,583,550 1,500,000+(g) Versutus Re 2017, 11/30/21 11,550 1,600,000+(a)(g) Versutus Re 2019-B, 12/31/21 1,680,320 1,500,000+(a)(h) Viribus Re 2019, 12/31/22 1,625,850 600,000+(a)(g) Woburn Re 2019, 12/31/22 627,124 -------------- $ 16,464,185 -------------- Total Reinsurance Sidecars $ 18,408,025 --------------------------------------------------------------------------------------------------------------------------- TOTAL INSURANCE-LINKED SECURITIES (Cost $34,419,996) $ 34,739,549 --------------------------------------------------------------------------------------------------------------------------- --------------------------------------------------------------------------------------------------------------------------- Shares --------------------------------------------------------------------------------------------------------------------------- EQUITY-LINKED NOTES -- 19.2% of Net Assets 153,000 BNP Paribas Issuance (Advanced Micro Devices), 21.45%, 11/26/19 (144A) $ 3,464,624 52,900 BNP Paribas Issuance (Alibaba Group Holding, Ltd), 10.43%, 12/24/19 9,095,097 99,500 BNP Paribas Issuance (Discover Financial Services), 6.73%, 10/1/19 7,608,267 31,500 BNP Paribas Issuance (Dollar General Corp.), 7.08%, 8/19/19 (144A) 3,522,865 273,000 BNP Paribas Issuance (Freeport-McMoRan, Inc.), 13.1%, 4/13/20 (144A) 3,326,505 202,700 BNP Paribas Issuance (Morgan Stanley), 9.47%, 12/24/19 9,082,987 130,000 BNP Paribas Issuance (NetApp, Inc.), 10.63%, 4/7/20 8,071,700 82,600 BNP Paribas Issuance (Owens Corning), 9.18%, 9/5/19 4,832,100 69,300 BNP Paribas Issuance (United Rentals, Inc.), 13.55%, 12/24/19 9,045,036 355,000 BNP Paribas Issuance (Viacom, Inc.), Class B, 8.23%, 11/7/19 (144A) 11,118,600 163,800 BNP Paribas Issuance (Walgreens Boots Alliance, Inc.), 9.72%, 4/21/20 (144A) 9,127,755 4,500 Citigroup Global Markets (Booking Holdings, Inc.), 7.2%, 3/4/20 (144A) 8,510,760 90,500 Citigroup Global Markets (Electronics Arts, Inc.), 10.7%, 1/14/20 (144A) 7,978,480 93,500 Citigroup Global Markets (iQIYI, Inc.), 18.8%, 3/4/20 (144A) 1,974,720 54,000 Citigroup Global Markets (United Rentals, Inc.), 10.95%, 4/27/20 (144A) 6,960,600 The accompanying notes are an integral part of these financial statements. Pioneer Multi-Asset Income Fund | Annual Report | 7/31/19 35 Schedule of Investments | 7/31/19 (continued) --------------------------------------------------------------------------------------------------------------------------- Shares Value --------------------------------------------------------------------------------------------------------------------------- EQUITY-LINKED NOTES -- (continued) 175,000 Citigroup Global Markets Holdings, Inc. (Bank of America Corp.), 7.34%, 5/6/20 (144A) $ 5,358,500 157,700 Citigroup Global Markets Holdings, Inc. (Oracle Corp.), 6.62%, 6/29/20 (144A) 8,900,588 24,050 Citigroup Global Markets Holdings, Inc. (SVB Financial Group), 10.07%, 6/24/20 (144A) 5,427,604 3,200 Credit Suisse AG London (AP Moller-Maersk AS), 3/9/20 3,618,341 67,800 Credit Suisse AG London (Kansas City Southern), 10/12/19 8,386,148 176,200 Credit Suisse AG London (Morgan Stanley), 10/29/19 7,978,600 29,600 Credit Suisse AG London (Raytheon Co.), 6.1%, 12/19/19 5,395,784 66,100 Credit Suisse AG London (United Rentals, Inc.), 12.5%, 10/17/19 8,617,788 69,300 Credit Suisse AG London (United Rentals, Inc.), 13.6%, 12/24/19 8,920,053 70,800 Credit Suisse AG London (Walgreens Boots Alliance, Inc.), 8/28/19 3,838,811 683,200 Goldman Sachs International (CenturyLink, Inc.), 18.9%, 2/18/20 8,259,888 10,900 Goldman Sachs International (GW Pharmaceuticals Plc), 13.1%, 8/2/19 1,764,983 330,000 Goldman Sachs International (Micron Technology, Inc.), 11/12/19 13,348,500 486,000 JP Morgan Structured Products (CenturyLink, Inc.), 17.75%, 5/19/20 5,598,720 48,300 JP Morgan Structured Products (Cognizant Technology Solutions Corp.), 6.63%, 4/17/20 3,249,624 EUR 544,500 JP Morgan Structured Products (Infineon Technologies AG), 10.44%, 12/24/19 9,120,479 841,100 Merrill Lynch International (CenturyLink, Inc.), 24.72%, 9/5/19 9,483,402 113,700 Merrill Lynch International (Micron Technologies, Inc.), 17.26%, 1/28/20 5,103,993 163,700 Merrill Lynch International (Morgan Stanley), 3/5/20 7,237,177 28,000 Merrill Lynch International (SVB Financial Group), 10.91%, 2/5/20 6,605,760 105,600 Merrill Lynch International (Synchrony Financial), 8/19/19 3,514,864 52,000 Merrill Lynch International (United Rentals, Inc.), 2/7/20 6,601,140 190,900 UBS AG (American International Group), 6.9%, 7/22/20 10,688,491 73,700 Wells Fargo & Company (AerCap Holdings NV), 8.66%, 1/16/20 3,306,182 283,200 Wells Fargo & Company (eBay, Inc.), 9.11%, 11/12/19 8,365,728 110,500 Wells Fargo & Company (Micron Technology, Inc.), 15.78%, 12/23/19 4,265,300 The accompanying notes are an integral part of these financial statements. 36 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/19 --------------------------------------------------------------------------------------------------------------------------- Shares Value --------------------------------------------------------------------------------------------------------------------------- EQUITY-LINKED NOTES -- (continued) 61,000 Wells Fargo & Company (United Rentals, Inc.), 10.8%, 10/29/19 $ 8,000,150 205,700 Wells Fargo & Company (Viacom, Inc.), 8.6%, 8/2/19 6,380,814 398,500 Wells Fargo & Company (Viacom, Inc.), 8.67%, 10/1/19 12,337,560 105,900 Wells Fargo Bank National Association (AerCap Holdings NV), 7.13%, 12/24/19 5,590,461 50,000 Wells Fargo Bank National Association (Apple, Inc.), 7.81%, 2/28/20 9,340,000 141,300 Wells Fargo Bank National Association (Cognizant Technology Solutions Corp.), 7.65%, 6/9/20 9,030,483 275,000 Wells Fargo Bank National Association (Credit Suisse Group AG), 9.0%, 5/12/20 3,586,000 414,000 Wells Fargo Bank National Association (iQIYI, Inc.), 20.26%, 2/6/20 8,081,280 --------------------------------------------------------------------------------------------------------------------------- TOTAL EQUITY LINKED NOTES (Cost $339,173,844) $ 339,023,292 --------------------------------------------------------------------------------------------------------------------------- INVESTMENT COMPANIES -- 2.4% of Net Assets GBP 408,632(a) Dragon Capital - Vietnam Enterprise Investments, Ltd., Class C $ 2,321,365 5,177,567 Invesco Senior Income Trust 21,952,884 3,627,825 Voya Prime Rate Trust 17,413,560 --------------------------------------------------------------------------------------------------------------------------- TOTAL INVESTMENT COMPANIES (Cost $43,428,148) $ 41,687,809 --------------------------------------------------------------------------------------------------------------------------- RIGHT/WARRANT -- 0.0%+ of Net Assets Health Care Providers & Services -- 0.0%+ 959,816(i) ANR, Inc. $ 10,558 -------------- Total Health Care Providers & Services $ 10,558 --------------------------------------------------------------------------------------------------------------------------- TOTAL RIGHT/WARRANT (Cost $--) $ 10,558 --------------------------------------------------------------------------------------------------------------------------- --------------------------------------------------------------------------------------------------------------------------- Number of Counter- Strike Expiration Contracts Description party Notional Price Date --------------------------------------------------------------------------------------------------------------------------- OVER THE COUNTER (OTC) PUT OPTION PURCHASED -- 0.0%+ 30,935 S&P 500 Index Citibank NA USD 3,045,040 USD 2,662 11/15/19 $ 777,564 --------------------------------------------------------------------------------------------------------------------------- TOTAL OVER THE COUNTER (OTC) PUT OPTION PURCHASED (Premiums paid $3,045,040) $ 777,564 --------------------------------------------------------------------------------------------------------------------------- TOTAL OPTIONS PURCHASED (Premiums paid $3,045,040) $ 777,564 --------------------------------------------------------------------------------------------------------------------------- TOTAL INVESTMENTS IN UNAFFILIATED ISSUERS -- 97.5% (Cost $1,716,931,300) $1,723,265,521 --------------------------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Multi-Asset Income Fund | Annual Report | 7/31/19 37 Schedule of Investments | 7/31/19 (continued) --------------------------------------------------------------------------------------------------------------------------- Change Net in Net Realized Unrealized Dividend Gain Appreciation Shares Income (Loss) (Depreciation) Value --------------------------------------------------------------------------------------------------------------------------- AFFILIATED ISSUER -- 0.5% CLOSED-END FUND -- 0.5% of Net Assets 765,744 Pioneer Floating Rate Trust(j) $ 498,625 $ -- $(288,824) $ 8,116,886 Other securities issued by affiliated issuers not held at year end 1,548,864 (3,097,512) 51,207 -- --------------------------------------------------------------------------------------------------------------------------- TOTAL CLOSED-END FUND (Cost $8,473,954) $2,047,489 $(3,097,512) $(237,617) $ 8,116,886 --------------------------------------------------------------------------------------------------------------------------- TOTAL INVESTMENTS IN AFFILIATED ISSUER -- 0.5% (Cost $8,473,954) $ 8,116,886 --------------------------------------------------------------------------------------------------------------------------- OTHER ASSETS AND LIABILITIES -- 2.0% $ 36,719,450 --------------------------------------------------------------------------------------------------------------------------- NET ASSETS -- 100.0% $1,768,101,857 =========================================================================================================================== bps Basis Points. FREMF Freddie Mac Multifamily Fixed-Rate Mortgage Loans. 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 July 31, 2019, the value of these securities amounted to $412,285,226, or 23.3% of net assets. (A.D.R.) American Depositary Receipts. (G.D.R.) Global Depositary Receipts. + Amount rounds to less than 0.1%. + Security that used significant unobservable inputs to determine its value. (a) Non-income producing security. (b) The interest rate is subject to change periodically. The interest rate and/or reference index and spread is shown at July 31, 2019. (c) Floating rate note. Coupon rate, reference index and spread shown at July 31, 2019. (d) Security is perpetual in nature and has no stated maturity date. (e) Payment-in-kind (PIK) security which may pay interest in the form of additional principal amount. (f) Securities are restricted as to resale. (g) Issued as participation notes. (h) Issued as preference shares. (i) ANR, Inc. warrants are exercisable into 959,816 shares. (j) Pioneer Floating Rate Trust is an affiliated fund managed by Amundi Pioneer Asset Management, Inc., (the "Adviser"). The accompanying notes are an integral part of these financial statements. 38 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/19 FORWARD FOREIGN CURRENCY CONTRACTS ------------------------------------------------------------------------------------------------------- Unrealized Currency Currency Settlement Appreciation Purchased In Exchange for Sold Deliver Counterparty Date (Depreciation) ------------------------------------------------------------------------------------------------------- SEK 159,095,678 EUR (15,037,079) Brown Brothers 9/30/19 $(217,322) Harriman & Co. AUD 12,633,010 USD (8,800,825) Goldman Sachs 9/26/19 (143,192) International AUD 25,298,055 NZD (26,531,823) HSBC Bank USA NA 8/28/19 (84,700) NOK 38,102,008 EUR (3,914,763) JPMorgan Chase 9/27/19 (47,903) Bank NA NOK 39,603,679 USD (4,570,992) JPMorgan Chase 9/26/19 (89,164) Bank NA PHP 935,000,000 USD (18,203,057) JPMorgan Chase 10/25/19 74,084 Bank NA COP 14,647,490,554 USD (4,598,586) Societe Generale 10/25/19 (157,503) ------------------------------------------------------------------------------------------------------- TOTAL FORWARD FOREIGN CURRENCY CONTRACTS $(665,700) ======================================================================================================= FUTURES CONTRACT INDEX FUTURES CONTRACT ------------------------------------------------------------------------------------- Number of Contracts Expiration Notional Market Unrealized Short Description Date Amount Value (Depreciation) ------------------------------------------------------------------------------------- 2,007 S&P 500 EMINI 9/20/19 $293,111,052 $299,268,787 $(6,157,735) ------------------------------------------------------------------------------------- TOTAL FUTURES CONTRACT $293,111,052 $299,268,787 $(6,157,735) ===================================================================================== Principal amounts are denominated in U.S. dollars ("USD") unless otherwise noted. ARS -- Argentine Peso AUD -- Australian Dollar COP -- Columbian Peso EGP -- Egyptian Pound EUR -- Euro GBP -- Great British Pound IDR -- Indonesian Rupiah NOK -- Norwegian Krone NZD -- New Zealand Dollar PHP -- Philippine Peso SEK -- Swedish Krona Purchases and sales of securities (excluding temporary cash investments) for the year ended July 31, 2019, aggregated $2,000,931,637 and $1,642,381,128, respectively. 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 effected at current market prices. During the year ended July 31, 2019, the Fund engaged in purchases of $21,483,378 and sales of $5,986,255 pursuant to these procedures, which resulted in a net realized gain/(loss) of $86,182. The accompanying notes are an integral part of these financial statements. Pioneer Multi-Asset Income Fund | Annual Report | 7/31/19 39 Schedule of Investments | 7/31/19 (continued) At July 31, 2019, the net unrealized depreciation on investments based on cost for federal tax purposes of $1,739,909,628 was as follows: Aggregate gross unrealized appreciation for all investments in which there is an excess of value over tax cost $ 64,688,590 Aggregate gross unrealized depreciation for all investments in which there is an excess of tax cost over value (80,039,246) ------------ Net unrealized depreciation $(15,350,656) ============ 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). See Notes to Financial Statements -- Note 1A. The following is a summary of the inputs used as of July 31, 2019, in valuing the Fund's investments: --------------------------------------------------------------------------------------------------------- Level 1 Level 2 Level 3 Total --------------------------------------------------------------------------------------------------------- Common Stocks $772,798,358 $ -- $ -- $ 772,798,358 Asset Backed Securities -- 43,382,107 -- 43,382,107 Collateralized Mortgage Obligations -- 84,955,800 -- 84,955,800 Corporate Bonds -- 331,402,854 -- 331,402,854 Foreign Government Bonds -- 74,487,630 -- 74,487,630 Insurance-Linked Securities Collateralized Reinsurance Multiperil -- U.S. -- -- 283,278 283,278 Multiperil -- U.S. Regional -- -- 240,716 240,716 Multiperil -- Worldwide -- -- 305,780 305,780 Windstorm -- U.S. Regional -- -- 7,350 7,350 Industry Loss Warranties Multiperil -- U.S. -- -- 238,820 238,820 Reinsurance Sidecars Multiperil -- U.S. -- -- 1,943,840 1,943,840 Multiperil -- Worldwide -- -- 16,464,185 16,464,185 All Other Insurance-Linked Securities -- 15,255,580 -- 15,255,580 Equity-Linked Notes -- 339,023,292 -- 339,023,292 Investment Companies 41,687,809 -- -- 41,687,809 Right/Warrant -- 10,558 -- 10,558 Over The Counter (OTC) Put Option Purchased -- 777,564 -- 777,564 Affiliated Closed-End Fund 8,116,886 -- -- 8,116,886 --------------------------------------------------------------------------------------------------------- Total Investments in Securities $822,603,053 $889,295,385 $19,483,969 $1,731,382,407 ========================================================================================================= The accompanying notes are an integral part of these financial statements. 40 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/19 --------------------------------------------------------------------------------------------------------- Level 1 Level 2 Level 3 Total --------------------------------------------------------------------------------------------------------- Other Financial Instruments Net unrealized depreciation on forward foreign currency contracts $ -- $ (665,700) $ -- $ (665,700) Net unrealized depreciation on futures contracts (6,157,735) -- -- (6,157,735) --------------------------------------------------------------------------------------------------------- Total Other Financial Instruments $ (6,157,735) $ (665,700) $ -- $ (6,823,435) ========================================================================================================= The following is a reconciliation of assets valued using significant unobservable inputs (Level 3): -------------------------------------------------------------------------------- Insurance- Linked Securities -------------------------------------------------------------------------------- Balance as of 7/31/18 $ 2,455,241(a) Realized gain (loss)(1) 621 Changed in unrealized appreciation (depreciation)(2) 943,819 Accrued discounts/premiums -- Purchases 17,897,730 Sales (1,813,442) Transfers in to Level 3* -- Transfers out of Level 3* -- -------------------------------------------------------------------------------- Balance as of 7/31/19 $19,483,969 ================================================================================ (a) Securities were classified as Corporate Bonds on July 31, 2018 financial statements. (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 year ended July 31, 2019, there were no transfers between Levels 1, 2 and 3. Net change in unrealized appreciation (depreciation) of Level 3 investments still held and considered Level 3 at July 31, 2019: $951,340 -------- The accompanying notes are an integral part of these financial statements. Pioneer Multi-Asset Income Fund | Annual Report | 7/31/19 41 Statement of Assets and Liabilities | 7/31/19 ASSETS: Investments in unaffiliated issuers, at value (cost $1,716,931,300) $1,723,265,521 Investments in affiliated issuers, at value (cost $8,473,954) 8,116,886 Cash 3,987,643 Foreign currencies, at value (cost $15,004,318) 14,963,612 Forwards collateral 360,000 Futures collateral 13,972,722 Due from broker for futures 9,960,614 Due from broker 700 Variation margin for futures contracts 3,010,500 Receivables -- Investment securities sold 28,422,720 Fund shares sold 7,227,413 Dividends 4,958,286 Interest 10,141,061 Due from the Adviser(a) 251,299 Other assets 50,398 ------------------------------------------------------------------------------------------------ Total assets $1,828,689,375 ================================================================================================ LIABILITIES: Payables -- Investment securities purchased $ 45,413,515 Fund shares repurchased 6,322,160 Distributions 162,822 Trustees' fees 8,096 Futures collateral 680,113 Net unrealized depreciation on forward foreign currency contracts 665,700 Net unrealized depreciation on futures contracts 6,157,735 Reserve for repatriation taxes 499,774 Due to affiliates 188,583 Accrued expenses 489,020 ------------------------------------------------------------------------------------------------ Total liabilities $ 60,587,518 ================================================================================================ NET ASSETS: Paid-in capital $1,936,451,330 Distributable earnings (loss) (168,349,473) ------------------------------------------------------------------------------------------------ Net assets $1,768,101,857 ================================================================================================ NET ASSET VALUE PER SHARE: No par value (unlimited number of shares authorized) Class A (based on $377,722,359/35,000,505 shares) $ 10.79 Class C (based on $422,863,214/39,314,451 shares) $ 10.76 Class K (based on $125,830,619/11,317,161 shares) $ 11.12 Class R (based on $834,598/77,089 shares) $ 10.83 Class Y (based on $840,851,067/78,063,728 shares) $ 10.77 MAXIMUM OFFERING PRICE PER SHARE: Class A (based on $10.79 net asset value per share/100%-4.50% maximum sales charge) $ 11.30 ================================================================================================ (a) Includes $60,305 of reimbursement by the Advisor for loss incurred on disposal of an investment that was in violation of an investment restriction. See Note 1B in the Notes to the Financial Statements. The accompanying notes are an integral part of these financial statements. 42 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/19 Statement of Operations For the Year Ended 7/31/19 INVESTMENT INCOME: Interest from unaffiliated issuers (net of foreign taxes withheld $774,449) $ 67,173,094 Dividends from unaffiliated issuers (net of foreign taxes withheld $2,294,726) 38,566,731 Dividends from affiliated issuers 2,047,489 ------------------------------------------------------------------------------------------------------------ Total investment income $ 107,787,314 ------------------------------------------------------------------------------------------------------------ EXPENSES: Management fees $ 8,020,248 Administrative expense 501,120 Transfer agent fees Class A 229,456 Class C 312,444 Class K 354 Class R 2,736 Class Y 719,288 Distribution fees Class A 951,178 Class C 4,361,005 Class R 3,699 Shareowner communications expense 101,233 Custodian fees 403,694 Registration fees 191,828 Professional fees 164,574 Printing expense 70,048 Pricing fees 18,514 Trustees' fees 78,571 Insurance expense 14,569 Miscellaneous 122,417 ------------------------------------------------------------------------------------------------------------ Total expenses $ 16,266,976 Less fees waived and expenses reimbursed by the Adviser (446,112) ------------------------------------------------------------------------------------------------------------ Net expenses $ 15,820,864 ------------------------------------------------------------------------------------------------------------ Net investment income $ 91,966,450 ------------------------------------------------------------------------------------------------------------ REALIZED AND UNREALIZED GAIN (LOSS) ON INVESTMENTS: Net realized gain (loss) on: Investments in unaffiliated issuers (a) $(89,950,480) Investments in affiliated issuers 3,097,511 Forward foreign currency contracts (776,704) Futures contracts (17,530,132) Swap contracts (458,879) Reimbursement by the Advisor 60,305 Other assets and liabilities denominated in foreign currencies (1,590,425) $(107,148,804) ------------------------------------------------------------------------------------------------------------ Change in net unrealized appreciation (depreciation) on: Investments in unaffiliated issuers (net of foreign capital gains tax of $421,694) $ (9,294,473) Investments in affiliated issuers (237,617) Forward foreign currency contracts (687,170) Futures contracts (2,870,541) Other assets and liabilities denominated in foreign currencies 115,825 $ (12,973,976) ------------------------------------------------------------------------------------------------------------ Net realized and unrealized gain (loss) on investments $(120,122,780) ------------------------------------------------------------------------------------------------------------ Net decrease in net assets resulting from operations $ (28,156,330) ============================================================================================================ (a) Includes realized loss of $60,305 on disposal of an investment that was in violation of an investment restriction. See Note 1B in the Notes to the Financial Statements. The accompanying notes are an integral part of these financial statements. Pioneer Multi-Asset Income Fund | Annual Report | 7/31/19 43 Statements of Changes in Net Assets -------------------------------------------------------------------------------------------------------- Year Ended Year Ended 7/31/19 7/31/18 -------------------------------------------------------------------------------------------------------- FROM OPERATIONS: Net investment income (loss) $ 91,966,450 $ 66,479,942 Net realized gain (loss) on investments (107,148,804) 12,257,837 Change in net unrealized appreciation (depreciation) on investments (12,973,976) (30,243,423) -------------------------------------------------------------------------------------------------------- Net increase (decrease) in net assets resulting from operations $ (28,156,330) $ 48,494,356 -------------------------------------------------------------------------------------------------------- DISTRIBUTIONS TO SHAREOWNERS: Class A ($0.62 and $0.73 per share, respectively) $ (21,153,144) $ (17,820,428)* Class C ($0.53 and $0.63 per share, respectively) (20,933,948) (19,229,934)* Class K ($0.67 and $0.77 per share, respectively) (7,263,285) (3,043,689)* Class R ($0.55 and $0.67 per share, respectively) (36,686) (52,797)* Class Y ($0.64 and $0.75 per share, respectively) (42,050,353) (28,311,133)* -------------------------------------------------------------------------------------------------------- Total distributions to shareowners $ (91,437,416) $ (68,457,981) -------------------------------------------------------------------------------------------------------- FROM FUND SHARE TRANSACTIONS: Net proceeds from sales of shares $ 770,447,213 $ 928,165,133 Reinvestment of distributions 87,056,699 64,117,347 Cost of shares repurchased (547,897,926) (263,959,075) -------------------------------------------------------------------------------------------------------- Net increase in net assets resulting from Fund share transactions $ 309,605,986 $ 728,323,405 -------------------------------------------------------------------------------------------------------- Net increase in net assets $ 190,012,240 $ 708,359,780 NET ASSETS:** Beginning of year $1,578,089,617 $ 869,729,837 -------------------------------------------------------------------------------------------------------- End of year $1,768,101,857 $1,578,089,617 ======================================================================================================== * For the year ended July 31, 2018, distributions to shareowners were presented as net investment income. ** For the year ended July 31, 2018, undistributed net investment income was presented as follows: $781,555. The accompanying notes are an integral part of these financial statements. 44 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/19 ------------------------------------------------------------------------------------------------------------ Year Ended Year Ended Year Ended Year Ended 7/31/19 7/31/19 7/31/18 7/31/18 Shares Amount Shares Amount ------------------------------------------------------------------------------------------------------------ Class A Shares sold 12,023,572 $ 133,782,388 16,710,715 $ 196,910,839 Reinvestment of distributions 1,866,733 20,552,610 1,468,145 17,289,610 Less shares repurchased (11,185,171) (123,692,634) (6,258,841) (73,606,837) ------------------------------------------------------------------------------------------------------------ Net increase 2,705,134 $ 30,642,364 11,920,019 $ 140,593,612 ============================================================================================================ Class C Shares sold 10,250,682 $ 113,800,388 15,138,830 $ 177,774,102 Reinvestment of distributions 1,873,854 20,567,362 1,613,022 18,955,388 Less shares repurchased (10,807,055) (118,984,752) (5,347,886) (62,804,175) ------------------------------------------------------------------------------------------------------------ Net increase 1,317,481 $ 15,382,998 11,403,966 $ 133,925,315 ============================================================================================================ Class K Shares sold 831,569 $ 9,263,238 10,676,861 $ 130,313,067 Reinvestment of distributions 444,260 4,980,520 4,634 55,862 Less shares repurchased (505,940) (5,808,969) (181,261) (2,165,489) ------------------------------------------------------------------------------------------------------------ Net increase 769,889 $ 8,434,789 10,500,234 $ 128,203,440 ============================================================================================================ Class R Shares sold 43,471 $ 484,605 25,082 $ 294,908 Reinvestment of distributions 2,539 28,009 1,639 19,378 Less shares repurchased (16,508) (181,371) (128,295) (1,528,104) ------------------------------------------------------------------------------------------------------------ Net increase (decrease) 29,502 $ 331,243 (101,574) $ (1,213,818) ============================================================================================================ Class Y Shares sold 46,491,174 $ 513,116,594 35,962,238 $ 422,872,217 Reinvestment of distributions 3,727,511 40,928,198 2,365,567 27,797,109 Less shares repurchased (27,275,193) (299,230,200) (10,541,457) (123,854,470) ------------------------------------------------------------------------------------------------------------ Net increase 22,943,492 $ 254,814,592 27,786,348 $ 326,814,856 ============================================================================================================ The accompanying notes are an integral part of these financial statements. Pioneer Multi-Asset Income Fund | Annual Report | 7/31/19 45 Financial Highlights ------------------------------------------------------------------------------------------------------------------------------------ Year Year Year Year Year Ended Ended Ended Ended Ended 7/31/19 7/31/18 7/31/17 7/31/16* 7/31/15* ------------------------------------------------------------------------------------------------------------------------------------ Class A Net asset value, beginning of period $ 11.59 $ 11.69 $ 10.57 $ 11.15 $ 11.94 ------------------------------------------------------------------------------------------------------------------------------------ Increase (decrease) from investment operations: Net investment income (loss) $ 0.62(a) $ 0.68(a) $ 0.67(a) $ 0.62(a) $ 0.60 Net realized and unrealized gain (loss) on investments (0.80) (0.05) 0.99 (0.57) (0.73) ------------------------------------------------------------------------------------------------------------------------------------ Net increase (decrease) from investment operations $ (0.18) $ 0.63 $ 1.66 $ 0.05 $ (0.13) ------------------------------------------------------------------------------------------------------------------------------------ Distributions to shareowners: Net investment income $ (0.62) $ (0.73) $ (0.54) $ (0.63) $ (0.66) ------------------------------------------------------------------------------------------------------------------------------------ Total distributions $ (0.62) $ (0.73) $ (0.54) $ (0.63) $ (0.66) ------------------------------------------------------------------------------------------------------------------------------------ Net increase (decrease) in net asset value $ (0.80) $ (0.10) $ 1.12 $ (0.58) $ (0.79) ------------------------------------------------------------------------------------------------------------------------------------ Net asset value, end of period $ 10.79 $ 11.59 $ 11.69 $ 10.57 $ 11.15 ==================================================================================================================================== Total return (b) (1.56)% 5.41% 16.13% 0.81% (1.10)% Ratio of net expenses to average net assets 0.85% 0.85% 0.85% 0.85% 0.85% Ratio of net investment income (loss) to average net assets 5.58% 5.77% 6.07% 5.99% 5.38% Portfolio turnover rate 108% 126% 131% 109% 120% Net assets, end of period (in thousands) $377,722 $374,395 $238,281 $238,779 $266,899 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Total expenses to average net assets 0.89% 0.87% 0.92% 0.94% 0.95% Net investment income (loss) to average net assets 5.54% 5.75% 6.00% 5.90% 5.28% ==================================================================================================================================== * 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. The accompanying notes are an integral part of these financial statements. 46 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/19 ------------------------------------------------------------------------------------------------------------------------------------ Year Year Year Year Year Ended Ended Ended Ended Ended 7/31/19 7/31/18 7/31/17 7/31/16* 7/31/15* ------------------------------------------------------------------------------------------------------------------------------------ Class C Net asset value, beginning of period $ 11.56 $ 11.66 $ 10.55 $ 11.12 $ 11.91 ------------------------------------------------------------------------------------------------------------------------------------ Increase (decrease) from investment operations: Net investment income (loss) $ 0.53(a) $ 0.58(a) $ 0.57(a) $ 0.53(a) $ 0.51 Net realized and unrealized gain (loss) on investments (0.80) (0.05) 0.99 (0.55) (0.74) ------------------------------------------------------------------------------------------------------------------------------------ Net increase (decrease) from investment operations $ (0.27) $ 0.53 $ 1.56 $ (0.02) $ (0.23) ------------------------------------------------------------------------------------------------------------------------------------ Distributions to shareowners: Net investment income $ (0.53) $ (0.63) $ (0.45) $ (0.55) $ (0.56) ------------------------------------------------------------------------------------------------------------------------------------ Total distributions $ (0.53) $ (0.63) $ (0.45) $ (0.55) $ (0.56) ------------------------------------------------------------------------------------------------------------------------------------ Net increase (decrease) in net asset value $ (0.80) $ (0.10) $ 1.11 $ (0.57) $ (0.79) ------------------------------------------------------------------------------------------------------------------------------------ Net asset value, end of period $ 10.76 $ 11.56 $ 11.66 $ 10.55 $ 11.12 ==================================================================================================================================== Total return (b) (2.33)% 4.60% 15.12% 0.06% (1.89)% Ratio of net expenses to average net assets 1.64% 1.62% 1.69% 1.69% 1.69% Ratio of net investment income (loss) to average net assets 4.78% 4.94% 5.24% 5.16% 4.59% Portfolio turnover rate 108% 126% 131% 109% 120% Net assets, end of period (in thousands) $422,863 $439,179 $310,023 $304,609 $353,686 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Total expenses to average net assets 1.65% 1.62% 1.69% 1.69% 1.69% Net investment income (loss) to average net assets 4.77% 4.94% 5.24% 5.16% 4.59% ==================================================================================================================================== * 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. The accompanying notes are an integral part of these financial statements. Pioneer Multi-Asset Income Fund | Annual Report | 7/31/19 47 Financial Highlights (continued) ------------------------------------------------------------------------------------------------------------------------------------ Year Year Year Year Ended Ended Ended Ended 12/1/14 7/31/19 7/31/18 7/31/17 7/31/16* to 7/31/15* ------------------------------------------------------------------------------------------------------------------------------------ Class K Net asset value, beginning of period $ 11.95 $ 11.85 $10.69 $11.15 $ 11.50 ------------------------------------------------------------------------------------------------------------------------------------ Increase (decrease) from investment operations: Net investment income (loss) $ 0.67(a) $ 0.90(a) $ 0.72(a) $ 0.57(a) $ 0.50 Net realized and unrealized gain (loss) on investments (0.83) (0.03) 1.01 (0.37) (0.37) ------------------------------------------------------------------------------------------------------------------------------------ Net increase (decrease) from investment operations $ (0.16) $ 0.87 $ 1.73 $ 0.20 $ 0.13 ------------------------------------------------------------------------------------------------------------------------------------ Distributions to shareowners: Net investment income $ (0.67) $ (0.77) $(0.57) $(0.66) $ (0.48) ------------------------------------------------------------------------------------------------------------------------------------ Total distributions $ (0.67) $ (0.77) $(0.57) $(0.66) $ (0.48) ------------------------------------------------------------------------------------------------------------------------------------ Net increase (decrease) in net asset value $ (0.83) $ 0.10 $ 1.16 $(0.46) $ (0.35) ------------------------------------------------------------------------------------------------------------------------------------ Net asset value, end of period $ 11.12 $ 11.95 $11.85 $10.69 $ 11.15 ==================================================================================================================================== Total return (b) (1.32)% 7.51% 16.65% 2.20% 1.13%(c) Ratio of net expenses to average net assets 0.56% 0.56% 0.63% 0.60% 0.63%(d) Ratio of net investment income (loss) to average net assets 5.87% 7.47% 6.46% 5.51% 5.63%(d) Portfolio turnover rate 108% 126% 131% 109% 120% Net assets, end of period (in thousands) $125,831 $126,017 $ 558 $ 245 $37,935 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Total expenses to average net assets 0.57% 0.56% 0.63% 0.60% 0.63%(d) Net investment income (loss) to average net assets 5.86% 7.47% 6.46% 5.51% 5.63%(d) ==================================================================================================================================== * 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) Annualized. The accompanying notes are an integral part of these financial statements. 48 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/19 ------------------------------------------------------------------------------------------------------------------------------------ Year Year Year Year Ended Ended Ended Ended 12/1/14 7/31/19 7/31/18 7/31/17 7/31/16* to 7/31/15* ------------------------------------------------------------------------------------------------------------------------------------ Class R Net asset value, beginning of period $11.64 $11.74 $10.62 $11.20 $11.50 ------------------------------------------------------------------------------------------------------------------------------------ Increase (decrease) from investment operations: Net investment income (loss) $ 0.55(a) $ 0.51(a) $ 0.64(a) $ 0.59(a) $ 0.43 Net realized and unrealized gain (loss) on investments (0.81) 0.06 0.97 (0.58) (0.30) ------------------------------------------------------------------------------------------------------------------------------------ Net increase (decrease) from investment operations $(0.26) $ 0.57 $ 1.61 $ 0.01 $ 0.13 ------------------------------------------------------------------------------------------------------------------------------------ Distributions to shareowners: Net investment income $(0.55) $(0.67) $(0.49) $(0.59) $(0.43) ------------------------------------------------------------------------------------------------------------------------------------ Total distributions $(0.55) $(0.67) $(0.49) $(0.59) $(0.43) ------------------------------------------------------------------------------------------------------------------------------------ Net increase (decrease) in net asset value $(0.81) $(0.10) $ 1.12 $(0.58) $(0.30) ------------------------------------------------------------------------------------------------------------------------------------ Net asset value, end of period $10.83 $11.64 $11.74 $10.62 $11.20 ==================================================================================================================================== Total return(b) (2.22)% 4.89% 15.53% 0.41% 1.16%(c) Ratio of net expenses to average net assets 1.57% 1.37% 1.37% 1.37% 1.40%(d) Ratio of net investment income (loss) to average net assets 4.92% 4.33% 5.74% 5.68% 4.20%(d) Portfolio turnover rate 108% 126% 131% 109% 120% Net assets, end of period (in thousands) $ 835 $ 554 $1,751 $1,225 $ 456 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Total expenses to average net assets 1.59% 1.37% 1.37% 1.37% 1.40%(d) Net investment income (loss) to average net assets 4.90% 4.33% 5.74% 5.68% 4.20%(d) ==================================================================================================================================== * 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) Annualized. The accompanying notes are an integral part of these financial statements. Pioneer Multi-Asset Income Fund | Annual Report | 7/31/19 49 Financial Highlights (continued) ------------------------------------------------------------------------------------------------------------------------------------ Year Year Year Year Year Ended Ended Ended Ended Ended 7/31/19 7/31/18 7/31/17 7/31/16* 7/31/15* ------------------------------------------------------------------------------------------------------------------------------------ Class Y Net asset value, beginning of period $ 11.57 $ 11.67 $ 10.56 $ 11.14 $ 11.93 ------------------------------------------------------------------------------------------------------------------------------------ Increase (decrease) from investment operations: Net investment income (loss) $ 0.64(a) $ 0.71(a) $ 0.70(a) $ 0.63(a) $ 0.63 Net realized and unrealized gain (loss) on investments (0.80) (0.06) 0.97 (0.56) (0.74) ------------------------------------------------------------------------------------------------------------------------------------ Net increase (decrease) from investment operations $ (0.16) $ 0.65 $ 1.67 $ 0.07 $ (0.11) ------------------------------------------------------------------------------------------------------------------------------------ Distributions to shareowners: Net investment income $ (0.64) $ (0.75) $ (0.56) $ (0.65) $ (0.68) ------------------------------------------------------------------------------------------------------------------------------------ Total distributions $ (0.64) $ (0.75) $ (0.56) $ (0.65) $ (0.68) ------------------------------------------------------------------------------------------------------------------------------------ Net increase (decrease) in net asset value $ (0.80) $ (0.10) $ 1.11 $ (0.58) $ (0.79) ------------------------------------------------------------------------------------------------------------------------------------ Net asset value, end of period $ 10.77 $ 11.57 $ 11.67 $ 10.56 $ 11.14 ==================================================================================================================================== Total return (b) (1.36)% 5.64% 16.27% 1.00% (0.89)% Ratio of net expenses to average net assets 0.65% 0.65% 0.65% 0.65% 0.65% Ratio of net investment income (loss) to average net assets 5.83% 6.03% 6.38% 6.10% 5.58% Portfolio turnover rate 108% 126% 131% 109% 120% Net assets, end of period (in thousands) $840,851 $637,945 $319,117 $202,134 $307,538 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Total expenses to average net assets 0.68% 0.66% 0.72% 0.72% 0.71% Net investment income (loss) to average net assets 5.80% 6.02% 6.31% 6.04% 5.52% ==================================================================================================================================== * 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. The accompanying notes are an integral part of these financial statements. 50 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/19 Notes to Financial Statements | 7/31/19 1. Organization and Significant Accounting Policies Pioneer Multi-Asset Income Fund (the "Fund") is one of two portfolios comprising Pioneer Series Trust IV, 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 seek a high level of current income to the extent consistent with a relatively high level of stability of principal. The Fund offers five classes of shares designated as Class A, Class C, Class K, Class R and Class Y shares. Each class of shares represents an interest in the same portfolio of investments of the Fund and has identical rights (based on relative net asset values) to assets and liquidation proceeds. Share classes can bear different rates of class-specific fees and expenses, such as transfer agent and distribution fees. Differences in class-specific fees and expenses will result in differences in net investment income and, therefore, the payment of different dividends from net investment income earned by each class. The Amended and Restated Declaration of Trust of the Fund gives the Board of Trustees the flexibility to specify either per-share voting or dollar-weighted voting when submitting matters for 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 K and Class Y shares. Amundi Pioneer Asset Management, Inc., an indirect wholly owned subsidiary of Amundi and Amundi's wholly owned subsidiary, Amundi USA, Inc., serves as the Fund's investment adviser (the "Adviser"). Amundi Pioneer Distributor, Inc., an affiliate of Amundi Pioneer Asset Management, Inc., serves as the Fund's distributor (the "Distributor"). In August 2018, the Securities and Exchange Commission ("SEC") released a Disclosure Update and Simplification Final Rule. The Final Rule amends Regulation S-X disclosures requirements to conform them to U.S. Generally Accepted Accounting Principles ("U.S. GAAP") for investment companies. The Fund's financial statements were prepared in compliance with the new amendments to Regulation S-X. Pioneer Multi-Asset Income Fund | Annual Report | 7/31/19 51 The Fund is an investment company and follows investment company accounting and reporting guidance under U.S. GAAP. U.S. GAAP requires 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 following is a summary of significant accounting policies followed by the Fund in the preparation of its financial statements: A. Security Valuation The net asset value of the Fund is computed once daily, on each day the New York Stock Exchange ("NYSE") is open, as of the close of regular trading on the NYSE. Equity securities that have traded on an exchange are valued by using the last sale price on the principal exchange where they are traded. Equity securities that have not traded on the date of valuation, or securities for which sale prices are not available, generally are valued using the mean between the last bid and asked prices or, if both last bid and asked prices are not available, at the last quoted bid price. Last sale and bid and asked prices are provided by independent third party pricing services. In the case of equity securities not traded on an exchange, prices are typically determined by independent third party pricing services using a variety of techniques and methods. The value of foreign securities is translated into U.S. dollars based on foreign currency exchange rate quotations supplied by a third party pricing source. Trading in non-U.S. equity securities is substantially completed each day at various times prior to the close of the NYSE. The values of such securities used in computing the net asset value of the Fund's shares are determined as of such times. The Fund may use a fair value model developed by an independent pricing service to value non-U.S. equity securities. Equity-linked notes and 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 52 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/19 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. 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. 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. Futures contracts are generally valued at the closing settlement price established by the exchange on which they are traded. Swap contracts, including interest rate swaps, caps and floors (other than centrally cleared swap contracts), are valued at the dealer quotations obtained from reputable International Swap Dealers Association members. Centrally cleared swaps are valued at the daily settlement price provided by the central clearing counterparty. Pioneer Multi-Asset Income Fund | Annual Report | 7/31/19 53 Shares of open-end registered investment companies (including money market mutual funds) are valued at such funds' net asset value. Repurchase agreements are valued at par. Cash may include overnight time deposits at approved financial institutions. Shares of exchange-listed closed-end funds are valued by using the last sale price on the principal exchange where they are traded. Shares of closed-end interval funds that offer their shares at net asset value are valued at such funds' net asset value. 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 July 31, 2019, 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. 54 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/19 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. During the fiscal year ended July 31, 2019, the Fund realized a loss of $60,305 due to the disposal of an investment that was in violation of the Fund's investment restrictions, which was subsequently reimbursed by the Advisor. 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. 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 July 31, 2019, 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. Pioneer Multi-Asset Income Fund | Annual Report | 7/31/19 55 In determining the daily net asset value, the Fund estimates the reserve for the repatriation of taxes, if any, associated with its investments in certain countries. The estimated reserve for capital gains is based on the net unrealized appreciation on certain portfolio securities, the holding period of such securities and the related tax rates, tax loss carryforwards (if applicable) and other such factors. As of July 31, 2019, the Fund had accrued $499,774 in reserve for repatriation taxes related to capital gains. 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. At July 31, 2019, the Fund was permitted to carry forward indefinitely $83,389,329 of short-term losses and $73,886,021 of long-term losses under the Regulated Investment Company Modernization Act of 2010 without limitation. The tax character of distributions paid during the years ended July 31, 2019 and July 31, 2018, were as follows: -------------------------------------------------------------------------- 2019 2018 -------------------------------------------------------------------------- Distributions paid from: Ordinary income $91,437,416 $68,457,981 -------------------------------------------------------------------------- Total $91,437,416 $68,457,981 ========================================================================== The following shows the components of distributable earnings on a federal income tax basis at July 31, 2019: -------------------------------------------------------------------------- 2019 -------------------------------------------------------------------------- Distributable earnings: Undistributed ordinary income $ 5,074,226 Capital loss carryforward (157,275,350) Current year dividend payable (162,821) Net unrealized depreciation (15,985,528) -------------------------------------------------------------------------- Total $(168,349,473) ========================================================================== 56 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/19 The difference between book-basis and tax-basis net unrealized appreciation is attributable to the tax deferral of losses on wash sales, adjustments relating to catastrophe bonds and PFIC's, the mark to market of forward foreign currency contracts and futures contracts, interest on defaulted bonds, tax basis adjustments on Real Estate Investment Trust ("REIT"), partnerships and other holdings. E. Fund Shares The Fund records sales and repurchases of its shares as of trade date. The Distributor earned $281,998 in underwriting commissions on the sale of Class A shares during the year ended July 31, 2019. F. Class Allocations Income, common expenses and realized and unrealized gains and losses are calculated at the fund level and allocated daily to each class of shares based on its respective percentage of adjusted net assets at the beginning of the day. Distribution fees are calculated based on the average daily net asset value attributable to Class A, Class C and Class R shares of the Fund, respectively (see Note 4). Class K and Class Y shares do not pay distribution fees. All expenses and fees paid to the Fund's transfer agent for its services are allocated among the classes of shares based on the number of accounts in each class and the ratable allocation of related out-of-pocket expenses (see Note 3). 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, Class K, Class R and Class Y shares can reflect different transfer agent and distribution expense rates. G. 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. 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. Pioneer Multi-Asset Income Fund | Annual Report | 7/31/19 57 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 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 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. 58 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/19 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. H. Insurance-Linked Securities ("ILS") The Fund invests in ILS. The Fund could lose a portion or all of the principal it has invested in an ILS, and the right to additional interest or dividend payments with respect to the security, upon the occurrence of one or more trigger events, as defined within the terms of an insurance-linked security. Trigger events, generally, are hurricanes, earthquakes, or other natural events of a specific size or magnitude that occur in a designated geographic region during a specified time period, and/or that involve losses or other metrics that exceed a specific amount. There is no way to accurately predict whether a trigger event will occur, and accordingly, ILS carry significant risk. The Fund is entitled to receive principal, and interest and/or dividend payments so long as no trigger event occurs of the description and magnitude specified by the instrument. In addition to the specified trigger events, ILS 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 event-linked bonds. ILS also 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. Where the ILS 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. Pioneer Multi-Asset Income Fund | Annual Report | 7/31/19 59 I. Repurchase Agreements Repurchase agreements are arrangements under which the Fund purchases securities from a broker-dealer or a bank, called the counterparty, upon the agreement of the counterparty to repurchase the securities from the Fund at a later date, and at a specific price, which is typically higher than the purchase price paid by the Fund. The securities purchased serve as the Fund's collateral for the obligation of the counterparty to repurchase the securities. The value of the collateral, including accrued interest, is required to be equal to or in excess of the repurchase price. The collateral for all repurchase agreements is held in safekeeping in the customer-only account of the Fund's custodian or a sub-custodian of the Fund. The Adviser is responsible for determining that the value of the collateral remains at least equal to the repurchase price. In the event of a default by the counterparty, the Fund is entitled to sell the securities, but the Fund may not be able to sell them for the price at which they were purchased, thus causing a loss to the Fund. Additionally, if the counterparty becomes insolvent, there is some risk that the Fund will not have a right to the securities, or the immediate right to sell the securities. As of and for the year ended July 31, 2019, the Fund had no open repurchase agreements. J. 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 is recorded on the Fund's Statement of Operations. 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. 60 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/19 The average market value of purchased options contracts open during the year ended July 31, 2019, was $2,223,241. Open purchased options at July 31, 2019, are listed in the Fund's Schedule of Investments. K. 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). At July 31, 2019, the Fund had entered into various forward foreign currency contracts that obligated 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 market value of forward foreign currency contracts open during the year ended July 31, 2019, was $12,838,569. Open forward foreign currency contracts outstanding at July 31, 2019, are listed in the Schedule of Investments. L. 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 July 31, 2019, 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 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/19 61 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 reduced 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 market value of futures contracts open during the year ended July 31, 2019, was $(254,267,857). Open futures contracts outstanding at July 31, 2019, are listed in the Schedule of Investments. M. Interest Rate Swap Contracts The Fund may enter into interest rate swaps to attempt to hedge against interest rate fluctuations or to enhance its income. Pursuant to the interest rate swap contract, the Fund negotiates with a counterparty to exchange a periodic stream of payments based on a benchmark interest rate. One cash flow stream will typically be a floating rate payment based upon the specified floating benchmark interest rate while the other is typically a fixed interest rate. Payment flows are usually netted against each other, with the difference being paid by one party to the other on a monthly basis. Periodic payments received or paid by the Fund are recorded as realized gains or losses on the Statement of Operations. Interest rate 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. Interest rate swap contracts are subject to counterparty risk and movements in interest rates. 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 contracts 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 swap contracts is recorded as variation margin for centrally cleared swaps on the Statement of Assets and Liabilities. The average market value of interest swap contracts open during the year ended July 31, 2019, was $(20,007). As of and for the year ended July 31, 2019, the Fund had no open interest rate swap contracts. 62 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/19 N. Equity-Linked Notes Equity-linked notes seek to generate income and provide exposure to the performance of an underlying security, group of securities or exchange-traded funds (the "underlying reference instrument"). In an equity-linked note, the Fund purchases a note from a bank or broker-dealer and in return, the issuer provides for interest payments during the term of the note. At maturity or when the security is sold, the Fund will either settle by taking physical delivery of the underlying reference instrument or by receipt of a cash settlement amount equal to the value of the note at termination or maturity. The use of equity-linked notes involves the risk that the value of the note changes unfavorably due to movements in the value of the underlying reference instrument. Equity-linked notes are considered general unsecured contractual obligations of the bank or broker-dealer. The Fund must rely on the creditworthiness of the issuer for its investment returns. 2. Management Agreement The Adviser manages the Fund's portfolio. Effective October 1, 2018, management fees are calculated daily at the annual rate of 0.50% of the Fund's average daily net assets up to $1 billion, 0.45% of the next $4 billion of the Fund's average daily net assets and 0.40% of the Fund's average daily net assets over $5 billion. Prior to October 1, 2018, management fees were calculated daily at the annual rate of 0.50% of the Fund's average daily net assets up to $1 billion and 0.45% on assets over $1 billion. For the year ended July 31, 2019, the effective management fee (excluding waivers and/or assumption of expenses was equivalent to 0.48% of the Fund's average daily net assets. The Adviser has agreed to waive its management fee with respect to any portion of the Fund's assets invested in Pioneer ILS Interval Fund and Floating Rate Trust, an affiliated fund managed by the Adviser. For the year ended July 31, 2019, the Adviser waived $233,415 in management fees with respect to the Fund, which is reflected on the Statement of Operations as an expense waiver. 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 0.85% and 0.65% of the average daily net assets attributable to Class A and Class Y shares, respectively. These expense limitations are in effect through December 1, 2019 for Class A shares and Class Y shares. Prior to December 1, 2018, the Adviser contractually agreed to limit ordinary operating expenses to the extent required to reduce Fund expenses to 1.75% of the average daily net assets attributable to Class C shares. Fees waived and expenses reimbursed during the year ended July 31, 2019 are reflected on the Pioneer Multi-Asset Income Fund | Annual Report | 7/31/19 63 Statement of Operations. 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 $117,332 in management fees, administrative costs and certain other reimbursements payable to the Adviser at July 31, 2019. 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, and outgoing phone calls. For the year ended July 31, 2019, such out-of-pocket expenses by class of shares were as follows: -------------------------------------------------------------------------------- Shareowner Communications: -------------------------------------------------------------------------------- Class A $ 21,873 Class C 26,577 Class K 347 Class R 1,052 Class Y 51,384 -------------------------------------------------------------------------------- Total $101,233 ================================================================================ 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, Class C and Class R shares. Pursuant to the Plan, the Fund pays the Distributor 0.25% of the average daily net assets attributable to Class A shares as compensation for personal services and/or account maintenance services or distribution services with regard to Class A shares. Pursuant to the Plan, the Fund also pays the Distributor 1.00% of the average daily net assets attributable to Class C shares. The fee for Class C shares consists of a 0.25% service fee and a 0.75% distribution fee paid as compensation for personal services and/or account maintenance services or distribution services with regard to Class C shares. Pursuant to the Plan, the Fund further pays the 64 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/19 Distributor 0.50% of the average daily net assets attributable to Class R shares for distribution services. Included in "Due to affiliates" reflected on the Statement of Assets and Liabilities is $71,251 in distribution fees payable to the Distributor at July 31, 2019. The Fund also has adopted a separate service plan for Class R shares (the "Service Plan"). The Service Plan authorizes the Fund to pay securities dealers, plan administrators or other service organizations that agree to provide certain services to retirement plans or plan participants holding shares of the Fund a service fee of up to 0.25% of the Fund's average daily net assets attributable to Class R shares held by such plans. In addition, redemptions of Class A and Class C 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 K, Class R and Class Y shares. Proceeds from the CDSCs are paid to the Distributor. For the year ended July 31, 2019, CDSCs in the amount of $91,549 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. Effective August 1, 2018, the Fund participates in a credit facility in the amount of $250 million. Under such facility, depending on the type of loan, interest on borrowings is payable at the London Interbank Offered Rate ("LIBOR") plus 0.90% on an annualized basis, or the Alternate Base Rate, which is the greater of (a) the facility's administrative agent's daily announced prime rate on the borrowing date, (b) 2% plus the Federal Funds Rate on the borrowing date, or (c) 2% plus the overnight Eurodollar rate on the borrowing date. The Fund pays an annual commitment fee to participate in a credit facility. The commitment fee is allocated among participating Funds based on an allocation schedule set forth in the credit agreement. For the year ended July 31, 2019, the Fund had no borrowings under the credit facility. Pioneer Multi-Asset Income Fund | Annual Report | 7/31/19 65 6. Master Netting Agreements 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 set-off may be restricted or prohibited by the bankruptcy or insolvency laws of the particular jurisdiction to which each specific ISDA Master Agreement 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". Securities pledged by the Fund as collateral, if any, are identified as such in the Schedule of Investments. 66 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/19 Financial instruments subject to an enforceable master netting agreement, such as an ISDA Master Agreement, have been offset on the Statement of Assets and Liabilities. The following charts show gross assets and liabilities of the Fund as of July 31, 2019. ----------------------------------------------------------------------------------------------------------- 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) ----------------------------------------------------------------------------------------------------------- Brown Brothers Harriman & Co. $ -- $ -- $ -- $ -- $ -- Citibank NA 777,564 -- -- -- 777,564 Goldman Sachs International -- -- -- -- -- HSBC Bank USA NA -- -- -- -- -- JPMorgan Chase Bank NA 74,084 (74,084) -- -- -- Societe Generale -- -- -- -- -- ----------------------------------------------------------------------------------------------------------- Total $851,648 $(74,084) $ -- $ -- $777,564 =========================================================================================================== ---------------------------------------------------------------------------------------------------------------- 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) ---------------------------------------------------------------------------------------------------------------- Brown Brothers Harriman & Co. $217,322 $ -- $ -- $ -- $217,322 Citibank NA -- -- -- -- -- Goldman Sachs International 143,192 -- -- -- 143,192 HSBC Bank USA NA 84,700 -- -- -- 84,700 JPMorgan Chase Bank NA 137,067 (74,084) -- -- 62,983 Societe Generale 157,503 -- -- -- 157,503 ---------------------------------------------------------------------------------------------------------------- Total $739,784 $(74,084) $ -- $ -- $665,700 ================================================================================================================ (a) The amount presented here may be less than the total amount of collateral received/pledged as the net amount of derivative assets and liabilities cannot be less than $0. (b) Represents the net amount due from the counterparty in the event of default. (c) Represents the net amount payable to the counterparty in the event of default. Pioneer Multi-Asset Income Fund | Annual Report | 7/31/19 67 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. 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 July 31, 2019, was as follows: --------------------------------------------------------------------------------------------- Foreign Statement of Interest Credit Exchange Equity Commodity Assets and Liabilities Rate Risk Risk Rate Risk Risk Risk --------------------------------------------------------------------------------------------- Assets Options purchased* $ -- $ -- $ -- $ 777,564 $ -- --------------------------------------------------------------------------------------------- Total Value $ -- $ -- $ -- $ 777,564 $ -- ============================================================================================= Liabilities Net unrealized depreciation on forward foreign currency contracts $ -- $ -- $(665,700) $ -- $ -- Net unrealized depreciation on futures contracts -- -- -- (6,157,735) -- --------------------------------------------------------------------------------------------- Total Value $ -- $ -- $(665,700) $(6,157,735) $ -- ============================================================================================= * Reflects the market value of purchased option contracts (see Note 1J.). These amounts are included in investments in unaffiliated issuers, at value, on the statement of assets and liabilities. 68 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/19 The effect of derivative instruments (not considered to be hedging instruments for accounting disclosure purposes) on the Statement of Operations by risk exposure at July 31, 2019, was as follows: --------------------------------------------------------------------------------------------------- Foreign Statement of Interest Credit Exchange Equity Commodity Operations Rate Risk Risk Rate Risk Risk Risk --------------------------------------------------------------------------------------------------- Net realized gain (loss) on: Options purchased* $ -- $ -- $ -- $ (4,932,702) $ -- Forward contracts -- -- (776,704) -- -- Futures contracts (577,340) -- 631,794 (17,584,586) -- Swap contracts (458,879) -- -- -- -- --------------------------------------------------------------------------------------------------- Total Value $(1,036,219) $ -- $(144,910) $(22,517,288) $ -- =================================================================================================== Change in net unrealized appreciation (depreciation) on: Options purchased** $ -- $ -- $ -- $ (1,336,427) $ -- Forward contracts -- -- (687,170) -- -- Futures contracts 126,188 -- (5,403) (2,991,326) -- --------------------------------------------------------------------------------------------------- Total Value $ 126,188 $ -- $(692,573) $ (4,327,753) $ -- =================================================================================================== * Reflects the net realized gain (loss) on purchased option contracts (see Note 1J). These amounts are included in net realized gain (loss) on investments in unaffiliated issuers, on the statements of operations. ** Reflects the change in net unrealized appreciation (depreciation) on purchased option contracts (see Note 1J.). These amounts are included in change in net unrealized appreciation (depreciation) on investments in unaffiliated issuers, on the statements of operations. Pioneer Multi-Asset Income Fund | Annual Report | 7/31/19 69 Report of Independent Registered Public Accounting Firm To the Board of Trustees of Pioneer Series Trust IV and the Shareowners of Pioneer Multi-Asset Income Fund: -------------------------------------------------------------------------------- Opinion on the Financial Statements We have audited the accompanying statement of assets and liabilities of Pioneer Multi-Asset Income Fund (the "Fund") (one of the funds constituting Pioneer Series Trust IV (the "Trust")), including the schedule of investments, as of July 31, 2019, and the related statement of operations for the year then ended, the statements of changes in net assets for each of the two years in the period then ended and the financial highlights for each of the three years in the period then ended (collectively referred to as the "financial statements"). The financial highlights for the periods ended July 31, 2015 and July 31, 2016 were audited by another independent registered public accounting firm whose report, dated September 28, 2016, expressed an unqualified opinion on those financial highlights. In our opinion, the financial statements present fairly, in all material respects, the financial position of Pioneer Multi-Asset Income Fund at July 31, 2019, the results of its operations for the year then ended, the changes in its net assets for each of the two years in the period then ended, and the financial highlights for each of the three years in the period then ended, in conformity with U.S. generally accepted accounting principles. Basis for Opinion These financial statements are the responsibility of the Fund's management. Our responsibility is to express an opinion on the Fund's financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) ("PCAOB") and are required to be independent with respect to the Fund in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB. We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. The Fund is not required to have, nor were we engaged to perform, an audit of the Fund's internal control over financial reporting. As part of our audits, we are required to obtain an understanding of internal control over financial reporting, but not for the purpose of expressing an opinion on the effectiveness of the Fund's internal control over financial reporting. Accordingly, we express no such opinion. 70 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/19 Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our procedures included confirmation of securities owned as of July 31, 2019, by correspondence with the custodian and brokers. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion. /s/ Ernst & Young LLP Boston, Massachusetts We have served as the Fund's auditor since 2017. September 29, 2019 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/19 71 ADDITIONAL INFORMATION (unaudited) For the year ended July 31, 2019, certain dividends paid by the Fund may be subject to a maximum tax rate of 15%, as provided for by the Jobs and Growth Tax Relief Reconciliation Act (the Act) of 2003. The Fund intends to designate up to the maximum amount of such dividends allowable under the Act, as taxed at a maximum rate of 15%. Complete information will be computed and reported in conjunction with your 2019 form 1099-DIV. The qualifying percentage of the Fund's ordinary income dividends for the purpose of the corporate dividends received deduction was 12.89%. Qualified interest income is exempt from nonresident alien (NRA) tax withholding. The percentage of the Fund's ordinary income distributions derived from qualified interest income was 21.95%. 72 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/19 Trustees, Officers and Service Providers Investment Adviser and Administrator Amundi Pioneer Asset Management, Inc. Custodian and Sub-Administrator Brown Brothers Harriman & Co. Independent Registered Public Accounting Firm Ernst & Young LLP Principal Underwriter Amundi Pioneer Distributor, Inc. Legal Counsel Morgan, Lewis & Bockius LLP 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/us. This information is also available on the Securities and Exchange Commission's web site at www.sec.gov. Trustees and Officers The Fund's Trustees and officers are listed below, together with their principal occupations and other directorships they have held during at least the past five years. Trustees who are interested persons of the Fund within the meaning of the 1940 Act are referred to as Interested Trustees. Trustees who are not interested persons of the Fund are referred to as Independent Trustees. Each of the Trustees, except for Ms. Durnin, serves as a Trustee of each of the 43 U.S. registered investment portfolios for which Amundi Pioneer serves as investment adviser (the "Pioneer Funds"). Ms. Durnin serves as a Trustee of 38 Pioneer Funds. The address for all Trustees and all officers of the Fund is 60 State Street, Boston, Massachusetts 02109. The Statement of Additional Information of the Fund includes additional information about the Trustees and is available, without charge, upon request, by calling 1-800-225-6292. Pioneer Multi-Asset Income Fund | Annual Report | 7/31/19 73 Independent Trustees ------------------------------------------------------------------------------------------------------------------------------------ Name, Age and Position Term of Office and Other Directorships Held With the Fund Length of Service Principal Occupation Held by Trustee ------------------------------------------------------------------------------------------------------------------------------------ Thomas J. Perna (68) Trustee since 2011. Private investor (2004 - 2008 and Director, Broadridge Financial Chairman of the Board Serves until a successor 2013 - present); Chairman (2008 - Solutions, Inc. (investor and Trustee trustee is elected or earlier 2013) and Chief Executive Officer communications and securities retirement or removal. (2008 - 2012), Quadriserv, Inc. processing provider for financial (technology products for services industry) (2009 - securities lending industry); and present); Director, Quadriserv, Senior Executive Vice President, Inc. (2005 - 2013); and The Bank of New York (financial Commissioner, New Jersey State and securities services) Civil Service Commission (1986 - 2004) (2011 - 2015) ------------------------------------------------------------------------------------------------------------------------------------ David R. Bock (75) Trustee since 2011. Managing Partner, Federal City Director of New York Mortgage Trustee Serves until a successor Capital Advisors (corporate Trust (publicly-traded mortgage trustee is elected or earlier advisory services company) REIT) (2004 - 2009, 2012 - retirement or removal. (1997 - 2004 and 2008 - present); present); Director of The Swiss Interim Chief Executive Officer, Helvetia Fund, Inc. (closed-end Oxford Analytica, Inc. (privately fund) (2010 - 2017); Director of held research and consulting Oxford Analytica, Inc. (2008 - company) (2010); Executive Vice 2015); and Director of Enterprise President and Chief Financial Community Investment, Inc. Officer, I-trax, Inc. (publicly (privately-held affordable housing traded health care services finance company) (1985 - 2010) company) (2004 - 2007); and Executive Vice President and Chief Financial Officer, Pedestal Inc. (internet-based mortgage trading company) (2000 - 2002); Private Consultant (1995 - 1997); Managing Director, Lehman Brothers (1992 - 1995); and Executive, The World Bank (1979 - 1992) ------------------------------------------------------------------------------------------------------------------------------------ Diane Durnin (62) Trustee since 2019. Managing Director - Head of None Trustee Serves until a successor Product Strategy and Development, trustee is elected or earlier BNY Mellon Investment Management retirement or removal. (2012-2018); Vice Chairman - The Dreyfus Corporation (2005 - 2018): Executive Vice President Head of Product, BNY Mellon Investment Management (2007-2012); Executive Director- Product Strategy, Mellon Asset Management (2005-2007); Executive Vice President Head of Products, Marketing and Client Service, Dreyfus Corporation (2000-2005); and Senior Vice President Strategic Product and Business Development, Dreyfus Corporation (1994-2000) ------------------------------------------------------------------------------------------------------------------------------------ Benjamin M. Friedman (74) Trustee since 2011. William Joseph Maier Professor of Trustee, Mellon Institutional Trustee Serves until a successor Political Economy, Harvard Funds Investment Trust and Mellon trustee is elected or earlier University (1972 - present) Institutional Funds Master retirement or removal. Portfolio (oversaw 17 portfolios in fund complex) (1989 - 2008) ------------------------------------------------------------------------------------------------------------------------------------ 74 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/19 ------------------------------------------------------------------------------------------------------------------------------------ Name, Age and Position Term of Office and Other Directorships Held With the Fund Length of Service Principal Occupation Held by Trustee ------------------------------------------------------------------------------------------------------------------------------------ Margaret B.W. Graham (72) Trustee since 2011. Founding Director, Vice-President None Trustee Serves until a successor and Corporate Secretary, The trustee is elected or earlier Winthrop Group, Inc. (consulting retirement or removal. firm) (1982 - present); Desautels Faculty of Management, McGill University (1999 - 2017); and Manager of Research Operations and Organizational Learning, Xerox PARC, Xerox's advance research center (1990-1994) ------------------------------------------------------------------------------------------------------------------------------------ Lorraine H. Monchak (62) Trustee since 2017. Chief Investment Officer, 1199 None Trustee (Advisory Trustee from SEIU Funds (healthcare workers 2014 - 2017) Serves union pension funds) (2001 - until a successor trustee present); Vice President - is elected or earlier International Investments Group, retirement or removal. American International Group, Inc. (insurance company) (1993 - 2001); Vice President - Corporate Finance and Treasury Group, Citibank, N.A. (1980 - 1986 and 1990 - 1993); Vice President - Asset/Liability Management Group, Federal Farm Funding Corporation (government- sponsored issuer of debt securities) (1988 - 1990); Mortgage Strategies Group, Shearson Lehman Hutton, Inc. (investment bank) (1987 - 1988); and Mortgage Strategies Group, Drexel Burnham Lambert, Ltd. (investment bank) (1986 - 1987) ------------------------------------------------------------------------------------------------------------------------------------ Marguerite A. Piret (71) Trustee since 2011. President and Chief Executive Director of New America High Trustee Serves until a successor Officer, Metric Financial Inc. Income Fund, Inc. (closed-end trustee is elected or earlier (formerly known as Newbury Piret investment company) (2004 - retirement or removal. Company) (investment banking firm) present); and Member, Board of (1981 - present) Governors, Investment Company Institute (2000 - 2006) ------------------------------------------------------------------------------------------------------------------------------------ Fred J. Ricciardi (72) Trustee since 2014. Consultant (investment company None Trustee Serves until a successor services) (2012 - present); trustee is elected or earlier Executive Vice President, BNY retirement or removal. Mellon (financial and investment company services) (1969 - 2012); Director, BNY International Financing Corp. (financial services) (2002 - 2012); Director, Mellon Overseas Investment Corp. (financial services) (2009 - 2012); Director, Financial Models (technology) (2005-2007); Director, BNY Hamilton Funds, Ireland (offshore investment companies) (2004-2007); Chairman/Director, AIB/BNY Securities Services, Ltd., Ireland (financial services) (1999-2006); and Chairman, BNY Alternative Investment Services, Inc. (financial services) (2005-2007) ------------------------------------------------------------------------------------------------------------------------------------ Pioneer Multi-Asset Income Fund | Annual Report | 7/31/19 75 Interested Trustees ------------------------------------------------------------------------------------------------------------------------------------ Name, Age and Position Term of Office and Other Directorships Held With the Fund Length of Service Principal Occupation Held by Trustee ------------------------------------------------------------------------------------------------------------------------------------ Lisa M. Jones (57)* Trustee since 2017. Director, CEO and President of None Trustee, President and Serves until a successor Amundi Pioneer Asset Management Chief Executive Officer trustee is elected or earlier USA, Inc. (since September 2014); retirement or removal Director, CEO and President of Amundi Pioneer Asset Management, Inc. (since September 2014); Director, CEO and President of Amundi Pioneer Distributor, Inc. (since September 2014); Director, CEO and President of Amundi Pioneer Institutional Asset Management, Inc. (since September 2014); Chair, Amundi Pioneer Asset Management USA, Inc., Amundi Pioneer Distributor, Inc. and Amundi Pioneer Institutional Asset Management, Inc. (September 2014 - 2018); Managing Director, Morgan Stanley Investment Management (2010 - 2013); Director of Institutional Business, CEO of International, Eaton Vance Management (2005 - 2010); and Director of Amundi USA, Inc. (since 2017) ------------------------------------------------------------------------------------------------------------------------------------ Kenneth J. Taubes (61)* Trustee since 2014. Director and Executive Vice None Trustee Serves until a successor President (since 2008) and Chief trustee is elected or earlier Investment Officer, U.S. (since retirement or removal 2010) of Amundi Pioneer Asset Management USA, Inc.; Director and Executive Vice President and Chief Investment Officer, U.S. of Amundi Pioneer (since 2008); Executive Vice President and Chief Investment Officer, U.S. of Amundi Pioneer Institutional Asset Management, Inc. (since 2009); Portfolio Manager of Amundi Pioneer (since 1999); and Director of Amundi USA, Inc. (since 2017) ------------------------------------------------------------------------------------------------------------------------------------ * Ms. Jones and Mr. Taubes are Interested Trustees because they are officers or directors of the Fund's investment adviser and certain of its affiliates. 76 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/19 Fund Officers ------------------------------------------------------------------------------------------------------------------------------------ Name, Age and Position Term of Office and Other Directorships Held With the Fund Length of Service Principal Occupation Held by Officer ------------------------------------------------------------------------------------------------------------------------------------ Christopher J. Kelley (54) Since 2011. Serves Vice President and Associate None Secretary and Chief at the discretion of General Counsel of Amundi Pioneer Legal Officer the Board since January 2008; Secretary and Chief Legal Officer of all of the Pioneer Funds since June 2010; Assistant Secretary of all of the Pioneer Funds from September 2003 to May 2010; and Vice President and Senior Counsel of Amundi Pioneer from July 2002 to December 2007 ------------------------------------------------------------------------------------------------------------------------------------ Carol B. Hannigan (58) Since 2011. Serves Fund Governance Director of Amundi None Assistant Secretary at the discretion of Pioneer since December 2006 and the Board Assistant Secretary of all the Pioneer Funds since June 2010; Manager - Fund Governance of Amundi Pioneer from December 2003 to November 2006; and Senior Paralegal of Amundi Pioneer from January 2000 to November 2003 ------------------------------------------------------------------------------------------------------------------------------------ Thomas Reyes (56) Since 2011. Serves Senior Counsel of Amundi Pioneer None Assistant Secretary at the discretion of since May 2013 and Assistant the Board Secretary of all the Pioneer Funds since June 2010; and Counsel of Amundi Pioneer from June 2007 to May 2013 ------------------------------------------------------------------------------------------------------------------------------------ Mark E. Bradley (59) Since 2011. Serves Vice President - Fund Treasury of None Treasurer and Chief Financial at the discretion of Amundi Pioneer; Treasurer of all and Accounting Officer the Board of the Pioneer Funds since March 2008; Deputy Treasurer of Amundi Pioneer from March 2004 to February 2008; and Assistant Treasurer of all of the Pioneer Funds from March 2004 to February 2008 ------------------------------------------------------------------------------------------------------------------------------------ Luis I. Presutti (54) Since 2011. Serves Director - Fund Treasury of Amundi None Assistant Treasurer at the discretion of Pioneer; and Assistant Treasurer the Board of all of the Pioneer Funds ------------------------------------------------------------------------------------------------------------------------------------ Pioneer Multi-Asset Income Fund | Annual Report | 7/31/19 77 Fund Officers (continued) ------------------------------------------------------------------------------------------------------------------------------------ Name, Age and Position Term of Office and Other Directorships Held With the Fund Length of Service Principal Occupation Held by Officer ------------------------------------------------------------------------------------------------------------------------------------ Gary Sullivan (61) Since 2011. Serves Senior Manager - Fund Treasury of None Assistant Treasurer at the discretion of Amundi Pioneer; and Assistant the Board Treasurer of all of the Pioneer Funds ------------------------------------------------------------------------------------------------------------------------------------ David F. Johnson (39) Since 2011. Serves Senior Manager - Fund Treasury of None Assistant Treasurer at the discretion of Amundi Pioneer since November 2008; the Board Assistant Treasurer of all of the Pioneer Funds since January 2009; and Client Service Manager - Institutional Investor Services at State Street Bank from March 2003 to March 2007 ------------------------------------------------------------------------------------------------------------------------------------ John Malone (48) Since 2018. Serves Managing Director, Chief None Chief Compliance Officer at the discretion of Compliance Officer of Amundi the Board Pioneer Asset Management; Amundi Pioneer Institutional Asset Management, Inc.; and the Pioneer Funds since September 2018; and Chief Compliance Officer of Amundi Pioneer Distributor, Inc. since January 2014. ------------------------------------------------------------------------------------------------------------------------------------ Kelly O'Donnell (48) Since 2011. Serves Vice President - Amundi Pioneer None Anti-Money Laundering at the discretion of Asset Management; and Anti-Money Officer the Board Laundering Officer of all the Pioneer Funds since 2006 ------------------------------------------------------------------------------------------------------------------------------------ 78 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/19 This page is for your notes. Pioneer Multi-Asset Income Fund | Annual Report | 7/31/19 79 This page is for your notes. 80 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/19 This page is for your notes. Pioneer Multi-Asset Income Fund | Annual Report | 7/31/19 81 This page is for your notes. 82 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/19 This page is for your notes. Pioneer Multi-Asset Income Fund | Annual Report | 7/31/19 83 This page is for your notes. 84 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/19 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 FactFoneSM 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 219427 Kansas City, MO 64121-9427 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/us This report must be preceded or accompanied by a prospectus. The Fund files a complete schedule of portfolio holdings with the Securities and Exchange Commission for the first and third quarters of each fiscal year as an exhibit to its reports on Form N-PORT. Shareholders may view the filed Form N-PORT by visiting the Commission's web site at https://www.sec.gov. [LOGO] Amundi Pioneer ============== ASSET MANAGEMENT Amundi Pioneer Asset Management, Inc. 60 State Street Boston, MA 02109 www.amundipioneer.com/us Securities offered through Amundi Pioneer Distributor, Inc. 60 State Street, Boston, MA 02109 Underwriter of Pioneer Mutual Funds, Member SIPC [C] 2019 Amundi Pioneer Asset Management 25962-07-0919 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)). Mr. David R. Bock, an independent trustee, is such an audit committee financial expert. (3) If the registrant provides the disclosure required by paragraph (a)(1) (ii) of this Item, it must explain why it does not have an audit committee financial expert. Not applicable. ITEM 4. PRINCIPAL ACCOUNTANT FEES AND SERVICES. (a) Disclose, under the caption AUDIT FEES, the aggregate fees billed for each of the last two fiscal years for professional services rendered by the principal accountant for the audit of the registrant's annual financial statements or services that are normally provided by the accountant in connection with statutory and regulatory filings or engagements for those fiscal years. The audit fees for the Trust were $80,000 payable to Ernst & Young LLP for the year ended July 31, 2019 and $80,000 for the year ended July 31, 2018. (b) Disclose, under the caption AUDIT-RELATED FEES, the aggregate fees billed in each of the last two fiscal years for assurance and related services by the principal accountant that are reasonably related to the performance of the audit of the registrant's financial statements and are not reported under paragraph (a) of this Item. Registrants shall describe the nature of the services comprising the fees disclosed under this category. There were no audit-related services in 2019 or 2018. (c) Disclose, under the caption TAX FEES, the aggregate fees billed in each of the last two fiscal years for professional services rendered by the principal accountant for tax compliance, tax advice, and tax planning. Registrants shall describe the nature of the services comprising the fees disclosed under this category. The tax fees for the Trust were $16,056 payable to Ernst & Young LLP for the year ended July 31, 2019 and $16,056 for the year ended July 31, 2018. (d) Disclose, under the caption ALL OTHER FEES, the aggregate fees billed in each of the last two fiscal years for products and services provided by the principal accountant, other than the services reported in paragraphs (a) through (c) of this Item. Registrants shall describe the nature of the services comprising the fees disclosed under this category. There were no other fees in 2019 or 2018. (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. Non-Audit Services Beginning with non-audit service contracts entered into on or after May 6, 2003, the effective date of the new SEC pre-approval rules, the Trust's audit committee is required to pre-approve services to affiliates defined by SEC rules to the extent that the services are determined to have a direct impact on the operations or financial reporting of the Trust. For the years ended July 31 2019 and 2018, there were no services provided to an affiliate that required the Trust's audit committee pre-approval. (f) If greater than 50 percent, disclose the percentage of hours expended on the principal accountants engagement to audit the registrant's financial statements for the most recent fiscal year that were attributed to work performed by persons other than the principal accountant's full-time, permanent employees. N/A (g) Disclose the aggregate non-audit fees billed by the registrants accountant for services rendered to the registrant, and rendered to the registrants investment adviser (not including any sub-adviser whose role is primarily portfolio management and is subcontracted with or overseen by another investment adviser), and any entity controlling, controlled by, or under common control with the adviser that provides ongoing services to the registrant for each of the last two fiscal years of the registrant. The aggregate non-audit fees for the Trust were $16,046 payable to Ernst & Young LLP for the year ended July 31, 2019 and $16,046 for the year ended July 31, 2018. (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 evaluated the Registrant's disclosure controls and procedures (as defined in Rule 30a-3(c) under the Investment Company Act of 1940) within 90 days of this filing and have concluded that the Registrant's disclosure controls and procedures were effective (except as noted below), as of that date, in ensuring that information required to be disclosed by the Registrant in this Form N-CSR was recorded, processed, summarized, and reported on a timely basis. Registrant's management concluded that there was a material weakness in the Registrant's internal control over financial reporting. The nature of the material weakness related to the recording of certain manually processed trades for Pioneer Multi-Asset Income Fund (the "Fund"), as well as the timely resolution of cash reconciling items between the order management system and the Fund's accounting records maintained by the Fund's custodian and accounting agent. The process and identified control were not operating effectively to identify certain trades, which were reflected in the Fund adviser's order management system but not recorded on the Fund's accounting records on a timely basis. Registrant's management corrected the Fund's July 31, 2019 financial statements prior to their issuance. The material weakness did not affect the Fund's reported net asset value in the Fund's financial statements. There were no misstatements to previously issued Fund financial statements. Effective May 6, 2019, management implemented the automated processing of certain previously manually processed trades. Additionally, management will enhance the functionality of its trading dashboard and evaluate the Registrant's procedures for cash and investment position reconciliations. (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. Other than the control implementation identified above on May 6, 2019, there were no significant changes in the Registrant's internal control over financial reporting that occurred during 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 other control enhancement identified above will be implemented after the period covered by this report. 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 IV By (Signature and Title)* /s/ Lisa M. Jones Lisa M. Jones, President & Chief Executive Officer Date October 9, 2019 Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated. By (Signature and Title)* /s/ Lisa M. Jones Lisa M. Jones, President & Chief Executive Officer Date October 9, 2019 By (Signature and Title)* /s/ Mark E. Bradley Mark E. Bradley, Treasurer & Chief Accounting & Financial Officer Date October 9, 2019 * Print the name and title of each signing officer under his or her signature.