OMB APPROVAL OMB Number: 3235-0570 Expires: January 31, 2017 Estimated average burden hours per response.....20.6 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, Pioneer Investment Management, Inc., 60 State Street, Boston, MA 02109 (Name and address of agent for service) Registrant's telephone number, including area code: (617) 742-7825 Date of fiscal year end: July 31 Date of reporting period: August 1, 2015 through July 31, 2016 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 Classic Balanced Fund -------------------------------------------------------------------------------- Annual Report | July 31, 2016 -------------------------------------------------------------------------------- Ticker Symbols: Class A AOBLX Class C PCBCX Class K PCBKX Class R CBPRX Class Y AYBLX [LOGO] PIONEER Investments(R) visit us: us.pioneerinvestments.com Table of Contents President's Letter 2 Portfolio Management Discussion 4 Portfolio Summary 11 Prices and Distributions 12 Performance Update 13 Comparing Ongoing Fund Expenses 18 Schedule of Investments 20 Financial Statements 47 Notes to Financial Statements 56 Report of Independent Registered Public Accounting Firm 68 Trustees, Officers and Service Providers 70 Pioneer Classic Balanced Fund | Annual Report | 7/31/16 1 President's Letter Dear Shareowner, The first half of 2016 has featured some remarkable twists and turns in the global economy. The year began on shaky footing as surging market volatility brought about by fears of weaker global economic growth as well as falling oil prices depressed returns for investors. In the US, both equity and fixed-income markets declined significantly through the first six weeks of the year, only to recover the losses by the end of the first quarter when market sentiment shifted, due in part to accommodative monetary policies from the world's central banks. Midway through the first quarter, for example, the US Federal Reserve System (the Fed) backed off plans to raise interest rates four times in 2016, and the European Central Bank announced a more comprehensive asset-purchasing program in the hopes of encouraging lending, and boosting both inflation and economic growth. The markets responded with a solid rally. By the end of May, in fact, US equities, as measured by the Standard & Poor's 500 Index, had generated a solid year-to-date (YTD) return of 3.55%, and the YTD return (as of 5/31/16) of the Barclays Aggregate Bond Index, a common measure of the US fixed-income market, was 3.45%. As markets began to settle down, the Brexit vote - the vote confirming that the United Kingdom (UK) would exit the European Union (EU) - surprised many, and the rollercoaster ride began once again. The market sold off sharply in the first few days after the vote, then rallied as investors sought bargains created by the initial post-Brexit sell-off, and as more, less ominous information about the implications of the Brexit results came to light. From a macroeconomic perspective, Pioneer believes the negative economic impact of Brexit on the US should be more limited compared with its effects on the UK and Europe. However, we expect reduced global demand due to a higher level of uncertainty and risk aversion among investors. While the spillover effects on the US economy are unclear, we think it possible that, in the event of a significant negative economic impact, the Fed might consider other monetary policy options. Globally, we believe that central banks are ready to act and that their initial focus will be to stabilize the markets and provide liquidity, if needed. While the Brexit vote is now official, the expectation is that the actual process of separating the UK from the EU could take at least two years. Only in the next several months may we begin to see signs of what path Europe will follow as it adapts to the reality of an EU without one of its most prominent members. Over the medium-term, however, we believe uncertainties over the future of Europe and central banks' reactions will likely dominate financial markets, and we believe the news flow surrounding Brexit will continue to weigh on riskier assets. Competing for headlines, too, is the current financial condition of many European banks. Ultimately, we think that the political and monetary policy responses will be the major variables when it comes to managing an orderly 2 Pioneer Classic Balanced Fund | Annual Report | 7/31/16 Brexit. In addition, as the second half of 2016 gets underway, we continue to see central bank policies as generally supportive of the US economy -- for which we maintain an expectation of modest growth this year. Aside from the Brexit-caused uncertainties, economies around the world in both developed and emerging markets are experiencing deep structural changes. Current challenges include incomplete debt deleveraging in both emerging and developed markets, where debt levels continue to grow, the transition of many emerging markets economies from export/investment-driven models to more domestic demand-driven models, and aging populations, which are reducing productivity and limiting economic growth potential (primarily in the developed markets but also in emerging markets such as China). Geopolitical instability on many fronts, the rising risk of policy mistakes, and market liquidity issues combine to increase the possibility of sharp swings in asset values. Meanwhile, in the US, as always in a presidential election year, the political rhetoric of 2016 has the potential to impact domestic sectors such as health care. Throughout Pioneer's history, we have believed in the importance of active management. During periods of market volatility, we view the value of active management as even more compelling. Our experienced and tenured investment teams focus on identifying value across global markets using proprietary research, careful risk management, and a long-term perspective. We believe our shareowners can benefit from the experience and tenure of our investment teams as well as the insights generated from our extensive research process. As always, and particularly during times of market uncertainty, we encourage you to work with your financial advisor to develop an overall investment plan that addresses both your short- and long-term goals, and to implement such a plan in a disciplined manner. We greatly appreciate the trust you have placed in us and look forward to continuing to serve you in the future. Sincerely, /s/ Lisa M. Jones Lisa M. Jones President and CEO Pioneer Investment Management USA Inc. July 31, 2016 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. These statements should not be relied upon for any other purposes. Past performance is no guarantee of future results, and there is no guarantee that market forecasts discussed will be realized. Pioneer Classic Balanced Fund | Annual Report | 7/31/16 3 Portfolio Management Discussion | 7/31/16 Both the domestic equity and fixed-income markets produced positive returns over the 12-month period ended July 31, 2016, but not without encountering high levels of volatility featuring several shifts, and even reversals in sentiment as investors reacted to a series of contrasting events and concerns. In the following interview, Walter Hunnewell, Jr., Charles Melchreit, and Brad Komenda discuss the factors that affected the performance of Pioneer Classic Balanced Fund during the 12-month period. Mr. Hunnewell, a vice president and portfolio manager at Pioneer, Mr. Melchreit, Director of Investment-Grade Management, a senior vice president, and a portfolio manager at Pioneer, and Mr. Komenda, a vice president and portfolio manager at Pioneer, are responsible for the day-to- day management of the Fund. Mr. Melchreit and Mr. Komenda became members of the Fund's management team on March 18, 2016, following the retirement of Richard Schlanger. Q How did the Fund perform during the 12-month period ended July 31, 2016? A Pioneer Classic Balanced Fund's Class A shares returned 0.88% at net asset value during the 12-month period ended July 31, 2016, while the Fund's benchmarks, the Standard & Poor's 500 Index (the S&P 500) and the Barclays Government/Credit Bond Index (the Barclays Index), returned 5.60% and 6.78%, respectively. During the same period, the average return of the 566 mutual funds in Lipper's Mixed-Asset Target Allocation Moderate Funds category was 2.03%, and the average return of the 898 mutual funds in Morningstar's Moderate Allocation Funds category was 1.86%. Q How would you describe the environment in the domestic equity and bond markets during the 12-month period ended July 31, 2016? A The U.S. equity and bond markets each endured successive waves of shifting trends over the 12-month period, but each ended the Fund's fiscal year with positive returns. During the first six months of the period, both markets came under pressure generated by a host of concerns, including worries that the domestic economy was slowing down, and could even fall back into recession, as well as concerns exacerbated by falling energy prices, which led to weakening levels of capital investment. Sluggish job growth and wariness that the U.S. Federal Reserve (the Fed) might act too aggressively in raising short-term interest rates - in the wake of the Fed's December 2015 rate hike - further increased investors' anxieties. The domestic stock market slumped badly from January through the middle of February 2016. January 2016 was, in fact, one of the worst opening months of a calendar year for the market on record. In the fixed-income market, the more credit-sensitive sectors moved in a parallel 4 Pioneer Classic Balanced Fund | Annual Report | 7/31/16 direction to equities during the early part of the period as spreads on corporate bonds - particularly high-yield corporates - declined. (Credit spreads are commonly defined as the differences in yield between Treasuries and other types of fixed-income securities with similar maturities.) Within the credit sectors, the debt instruments issued by industrial companies reliant on the energy industry performed particularly poorly as the effects of falling oil prices worked their way into other parts of the economy. As the credit spreads widened, Treasuries gained in value and outperformed. Meanwhile, falling market interest rates led to outperformance by longer-duration portfolios. (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.) The market slump came to an abrupt end in the middle of February, however, as oil prices stabilized and then rose, and the job market showed renewed vitality. Stock prices started recovering and credit spreads finally tightened, leading to stronger performance by credit-sensitive debt, with the rally led by high-yield corporates. The strong rebound in both the equity and fixed-income markets persisted almost unabated through the end of the period on July 31, 2016, despite a dramatic - but temporary - reversal in late June triggered by the surprising victory of the "leave" side in the United Kingdom's (U.K.'s) referendum vote on leaving the European Union ("Brexit"). While the credit-sensitive sectors of the fixed-income market were rebounding in the final months of the Fund's fiscal year, long-term and intermediate-term interest rates continued to move lower, benefitting longer-duration investments, especially Treasuries and government-agency bonds. Moreover, as international investors allocated additional money to the United States late in the period in reaction to uncertainties created by the Brexit vote, the U.S. dollar strengthened, adding fuel to the rally in Treasuries. Q Did you change the Fund's allocation between stocks and fixed-income investments during the 12-month period ended July 31, 2016? A The Fund's allocations to equities and fixed-income securities remained relatively consistent over the 12 months. At the start of the period, 63% of the Fund's assets were in equities, and at the conclusion of the period, that number was at 62%. Fixed-income investments represented 37% of the Fund's assets at the beginning of the 12-month period, and 38% as of July 31, 2016. The portfolio's exposure to equities did decline temporarily in January and early February 2016 as a result of the market sell-offs that characterized that timeframe, but the equity exposure moved back up as stock prices rebounded in the middle of February. Pioneer Classic Balanced Fund | Annual Report | 7/31/16 5 Q What investment strategies or individual holdings most affected the benchmark-relative performance of the Fund's equity portfolio during the 12-month period ended July 31, 2016? A The Fund's equity portfolio faced a series of challenges during the period, and ended up lagging the return of the benchmark S&P 500 for the full 12 months. The Fund's significant underweights in both the utilities and telecommunication services sectors, which were the two top-performing sectors in the S&P 500 over the 12-month period, detracted from benchmark-relative returns. Historically, both sectors have tended to offer above-average dividend yields, and that proved attractive to yield-oriented investors during the period, given the low rates (yields) available in the fixed-income market. While our investment strategy emphasizes dividend yield when selecting stocks for the Fund's portfolio, we nevertheless de-emphasized the utilities and telecom services sectors during the period, in favor of owning shares of companies that are more growth and cyclically driven, particularly those that we feel have the potential to increase their dividends* over time. Our decision to significantly overweight the portfolio in health care during the period also detracted from the Fund's benchmark-relative returns, as the sector's performance lagged that of the S&P 500 over the 12 months. Despite underperforming the S&P 500, the Fund still saw solid performance from a number of equity holdings during the 12-month period. The top contributor to the Fund's benchmark-relative returns during the period was a position in software company Microsoft, which performed well as investors began appreciating the value of Microsoft's strong presence in the fast- growing market for providing services in the cloud-based computing area of the industry. The second-largest contributor to the Fund's relative performance during the period was a position in Iron Mountain, a leading provider of physical storage services for paper documents. The company recently completed a successful acquisition, while at the same time broadening its storage services and increasing its stock dividend. Shares of value-oriented retail store chain Dollar General, a holding in the consumer discretionary sector, was the Fund's third-best performance contributor during the period. Dollar General benefited from the increased spending power of its lower-income customer base, a positive side effect of declining energy prices. Rounding out the top five contributors to the Fund's benchmark-relative performance during the 12-month period were positions in brewing company Molson-Coors and food products company Hershey. Molson-Coors is likely to benefit from consolidation in the global brewing industry, and Hershey showed surprising earnings strength resulting from reduced input prices and cost actions by the company's management. * Dividends are not guaranteed. 6 Pioneer Classic Balanced Fund | Annual Report | 7/31/16 Positions that detracted from the Fund's benchmark-relative returns during the period included biotech company Gilead, which was the biggest drag on relative performance. Gilead's stock price declined when the market began doubting the potential of the company's Hepatitis C franchise; those concerns, in turn, overshadowed the strength of Gilead's HIV-related business. Our dividend-income-focused stock selection strategy leaves some room for investment in more growth-oriented, non-dividend-paying equities, such as Gilead. When we made the initial investment in Gilead, the company did not pay a dividend; however, it subsequently initiated one, which it has continued to pay. We reduced the Fund's position in Gilead towards the end of the 12-month period. The second-biggest detractor from benchmark-relative returns during the period was a position in another pharmaceutical firm, AbbVie. Despite the company's generous dividend, the stock underperformed due to concerns about the patent life of its rheumatoid arthritis drug Humira. We sold the Fund's position before period end. The third- and fourth-biggest detractors from the Fund's relative returns during the period also were in the health care sector: drug-distribution company McKesson, and pharmaceutical chain/prescription benefits manager CVS Health. McKesson's stock underperformed as price inflation for generic drugs eroded the company's earnings power. We sold the Fund's position before period end. With regard to CVS, the Fund had an overweight position in the stock, which produced disappointing results when the market developed concerns about the company's ability to retain and win institutional clients for its pharmaceutical benefits management business. We retained the Fund's position in CVS, though, as the company has demonstrated an ability to win and retain those clients. Finally, in the financials sector, the Fund's shares of banking corporation Wells Fargo detracted from benchmark-relative performance. With regard to overall positioning within the equity portfolio, we maintained the Fund's underweights to utilities and telecom services as of the end of the period, despite the sectors' strong performance during the past 12 months. The materials sector represents the portfolio's third-largest underweight. The Fund's largest overweight at period end was in health care. In addition, the Fund ended the 12-month period with overweights in consumer staples and consumer discretionary. Over the 12 months, we added significantly to the portfolio's position in consumer staples, which is one defensive sector where we believe both valuation and dividend growth remain attractive. We also added to the Fund's holdings in consumer discretionary and industrials. While health care remains the Fund's largest overweight, we significantly reduced the portfolio's exposure to the sector over the 12-month period. We also reduced the weightings in the materials and information technology sectors. Pioneer Classic Balanced Fund | Annual Report | 7/31/16 7 Q What investment strategies most affected the benchmark-relative performance of the Fund's fixed-income portfolio during the 12-month period ended July 31, 2016? A The return of the Fund's fixed-income portfolio trailed the return of the benchmark Barclays Index over the 12-month period. The portfolio's short- duration stance compared with the benchmark was the major factor holding back the Fund's relative results. During the course of the Fund's fiscal year, the portfolio's duration averaged 1.7 years less than that of the Barclays index. The Fund's duration positioning proved to be a disadvantage during the 12-month period as longer-maturity debt outperformed in the wake of declining interest rates. The negative effects of duration positioning on the Fund's benchmark- relative returns were offset, somewhat, by good sector allocation decisions, although individual security selection had a slight negative influence on relative results. From the outset of the period, we were less pessimistic on the economy than the overall market, and so we overweighted the portfolio in the credit-sensitive sectors - especially corporate bonds - while significantly underweighting U.S. Treasuries. In addition, when the credit sectors underperformed early in the 12-month period, we took advantage of the more attractive prices and increased the Fund's allocation. While the tactic hurt benchmark-relative performance early in the 12-month period, it turned out to be a major advantage when credit-sensitive debt rallied over the final months of the Fund's fiscal year. Significantly, we held and added to portfolio positions in the corporate debt of energy issuers, especially those in the processing and energy transportation industries, such as pipeline companies. That exposure made a large contribution to the Fund's benchmark-relative performance over the final months of the period. As of July 31, 2016, the Fund was significantly underweight in U.S. Treasuries and government-agency bonds, which represent more than 50% of the Barclays Index. Finally, the portfolio's effective duration was 4.5 years as of period end. Q Did the Fund have any investments in derivative securities during the 12-month period? If so, did the holdings affect benchmark-relative performance? A Yes, in the Fund's fixed-income portfolio, we invested in some Treasury futures contracts as part of our strategy to keep a low duration. Because the Fund's shorter-duration positioning detracted from benchmark-relative performance, the use of Treasury futures was a slight negative factor. We used no derivatives in the equity portfolio. 8 Pioneer Classic Balanced Fund | Annual Report | 7/31/16 Q What factors affected the Fund's yield, or distributions to shareholders, during the 12-month period ended July 31, 2016? A The Fund's quarterly dividend distributions ended the period at the same level as at the start, after moving down twice and moving back up twice over the course of the 12 months. Declining market interest rates tended to hold down the Fund's current income during the period, while our focus on owning dividend-paying stocks in the equity portfolio tended to provide support for the Fund's dividend level. Q What is your investment outlook? A We believe the domestic economy, as measured by gross domestic product (GDP), should grow by 1.50% to 2.00% overall during 2016, supported by continued monetary accommodation by the Fed. We believe strong consumer spending, helped by an improving job market, should be the main factor sustaining this GDP growth. In managing the Fund's equity portfolio, we expect to remain cautious because corporate earnings growth has been relatively modest of late. We intend to favor investing in companies with a domestic orientation that we believe can benefit from moderate growth in consumer spending. That said, any weakening of the U.S. dollar (USD) would improve investment opportunities in more export-oriented companies and potentially lead to a resurgence in the industrials sector. So we plan to be watchful for any such change in the USD. We retain our traditional preference for owning shares of quality, large-cap companies that we believe can sustain solid earnings growth. In managing the Fund's fixed-income portfolio, we remain heavily underweight to Treasuries relative to the Barclays Index, although we may attempt to offset that positioning, to a certain degree, with a sizable allocation to government-agency mortgages, which are not a benchmark component. We are satisfied, at the present time, with the portfolio's exposures to non-agency mortgages and floating-rate bank loans, but we are analyzing the Fund's holdings of event-linked (insurance industry) bonds, and may choose to reduce that allocation going forward. We believe the risk of a backup in interest rates has increased, and so we remain comfortable with the Fund's short-duration stance relative to the Barclays Index. Pioneer Classic Balanced Fund | Annual Report | 7/31/16 9 Please refer to the Schedule of Investments on pages 20-46 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 pre-payments. 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. 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 Pioneer Investments 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 Classic Balanced Fund | Annual Report | 7/31/16 Portfolio Summary | 7/31/16 Portfolio Diversification* -------------------------------------------------------------------------------- (As a percentage of total investment portfolio) [THE FOLLOWING DATA WAS REPRESENTED AS A PIE CHART IN THE PRINTED MATERIAL] U.S. Common Stocks 59.0% U.S. Corporate Bonds 12.7% U.S. Government Securities 12.4% International Corporate Bonds 5.1% Collateralized Mortgage Obligations 3.4% International Common Stocks 2.3% Asset Backed Securities 1.6% Municipal Bonds 1.1% Senior Secured Loans 0.9% U.S. Preferred Stocks 0.6% Depositary Receipts for International Stocks 0.5% Convertible Preferred Stocks 0.3% Foreign Government Bonds 0.1% * Includes investments in insurance-linked securities totaling 1.6% of total investment portfolio. Sector Distribution -------------------------------------------------------------------------------- (As a percentage of total long-term holdings) [THE FOLLOWING DATA WAS REPRESENTED AS A PIE CHART IN THE PRINTED MATERIAL] Financials 22.8% Information Technology 13.3% Government 13.0% Health Care 11.5% Consumer Discretionary 10.2% Industrials 8.5% Consumer Staples 8.1% Energy 7.0% Utilities 2.1% Telecommunication Services 1.8% Materials 1.7% 10 Largest Holdings -------------------------------------------------------------------------------- (As a percentage of total long-term holdings)** 1. Pfizer, Inc. 3.35% -------------------------------------------------------------------------------- 2. Microsoft Corp. 3.22 -------------------------------------------------------------------------------- 3. Alphabet, Inc. 2.49 -------------------------------------------------------------------------------- 4. The Home Depot, Inc. 2.29 -------------------------------------------------------------------------------- 5. Wells Fargo & Co. 2.16 -------------------------------------------------------------------------------- 6. Johnson & Johnson 1.70 -------------------------------------------------------------------------------- 7. Medtronic Plc 1.58 -------------------------------------------------------------------------------- 8. Apple, Inc. 1.56 -------------------------------------------------------------------------------- 9. The Hershey Co. 1.52 -------------------------------------------------------------------------------- 10. CVS Health Corp. 1.49 -------------------------------------------------------------------------------- ** This list excludes temporary cash investments and derivative instruments. The Fund is actively managed, and current holdings may be different. The holdings listed should not be considered recommendations to buy or sell any security listed. Pioneer Classic Balanced Fund | Annual Report | 7/31/16 11 Prices and Distributions | 7/31/16 Net Asset Value per Share -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- Class 7/31/16 7/31/15 -------------------------------------------------------------------------------- A $ 9.07 $ 9.36 -------------------------------------------------------------------------------- C $ 9.00 $ 9.30 -------------------------------------------------------------------------------- R $ 9.06 $ 9.36 -------------------------------------------------------------------------------- Y $ 9.11 $ 9.41 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- Class 7/31/16 12/1/15* -------------------------------------------------------------------------------- K $ 9.06 $ 9.01 -------------------------------------------------------------------------------- * Class K shares commenced operations on December 1, 2015. Distributions per Share: 8/1/15-7/31/16 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- Net Investment Short-Term Long-Term Class Income Capital Gains Capital Gains -------------------------------------------------------------------------------- A $ 0.1756 $ -- $ 0.1829 -------------------------------------------------------------------------------- C $ 0.1109 $ -- $ 0.1829 -------------------------------------------------------------------------------- K $ 0.1443 $ -- $ 0.0053 -------------------------------------------------------------------------------- R $ 0.1667 $ -- $ 0.1829 -------------------------------------------------------------------------------- Y $ 0.1921 $ -- $ 0.1829 -------------------------------------------------------------------------------- Index Definitions -------------------------------------------------------------------------------- The Standard & Poor's 500 Index is an unmanaged, commonly used measure of the broad U.S. stock market. The Barclays 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 Classic Balanced Fund | Annual Report | 7/31/16 Performance Update | 7/31/16 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 Classic Balanced Fund at public offering price during the periods shown, compared to that of the Standard & Poor's 500 Index and Barclays Government/Credit Bond Index. Average Annual Total Returns (As of July 31, 2016) -------------------------------------------------------------------------------- Barclays Govern- Net Public ment/ Standard Asset Offering Credit & Poor's Value Price Bond 500 Period (NAV) (POP) Index Index -------------------------------------------------------------------------------- 10 Years 6.08% 5.59% 5.17% 7.74% 5 Years 7.97 6.98 3.88 13.36 1 Year 0.88 -3.65 6.78 5.60 -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated December 1, 2015) -------------------------------------------------------------------------------- Gross Net -------------------------------------------------------------------------------- 1.32% 1.25% -------------------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $10,000 Investment Pioneer Barclays Standard & Classic Government/ Poor's 500 Balanced Fund Credit Bond Index Index 7/06 $ 9,550 $10,000 $10,000 7/07 $10,543 $10,568 $11,612 7/08 $ 9,750 $11,222 $10,325 7/09 $ 9,267 $12,023 $ 8,265 7/10 $10,201 $13,098 $ 9,409 7/11 $11,738 $13,690 $11,258 7/12 $12,208 $14,847 $12,283 7/13 $14,065 $14,550 $15,351 7/14 $15,982 $15,122 $17,949 7/15 $17,073 $15,507 $19,958 7/16 $17,223 $16,557 $21,077 Call 1-800-225-6292 or visit us.pioneerinvestments.com for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. POP returns reflect deduction of the maximum 4.50% sales charge. NAV results represent the percent change in net asset value per share. Returns would have been lower had sales charges been reflected. All results are historical and assume the reinvestment of dividends and capital gains. Other share classes are available for which performance and expenses will differ. Performance results reflect any applicable expense waivers in effect during the periods shown. Without such waivers Fund performance would be lower. Waivers may not be in effect for all funds. Certain fee waivers are contractual through a specified period. Otherwise, fee waivers can be rescinded at any time. See the prospectus and financial statements for more information. The net expense ratio reflects the contractual expense limitation currently in effect through December 1, 2017, for Class A shares. There can be no assurance that Pioneer will extend the expense limitation beyond such time. Please see the prospectus and financial statements for more information. Please see the financial highlights for more recent expense ratios. 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. Pioneer Classic Balanced Fund | Annual Report | 7/31/16 13 Performance Update | 7/31/16 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 Classic Balanced Fund during the periods shown, compared to that of the Standard & Poor's 500 Index and Barclays Government/Credit Bond Index. Average Annual Total Returns (As of July 31, 2016) -------------------------------------------------------------------------------- Barclays Govern- ment/ Standard Credit & Poor's If If Re- Bond 500 Period Held deemed Index Index -------------------------------------------------------------------------------- 10 Years 5.19% 5.19% 5.17% 7.74% 5 Years 7.11 7.11 3.88 13.36 1 Year 0.04 0.04 6.78 5.60 -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated December 1, 2015) -------------------------------------------------------------------------------- Gross -------------------------------------------------------------------------------- 2.02% -------------------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $10,000 Investment Pioneer Barclays Standard & Classic Government/ Poor's 500 Balanced Fund Credit Bond Index Index 7/06 $10,000 $10,000 $10,000 7/07 $10,954 $10,568 $11,612 7/08 $10,033 $11,222 $10,325 7/09 $ 9,452 $12,023 $ 8,265 7/10 $10,325 $13,098 $ 9,409 7/11 $11,769 $13,690 $11,258 7/12 $12,136 $14,847 $12,283 7/13 $13,877 $14,550 $15,351 7/14 $15,626 $15,122 $17,949 7/15 $16,586 $15,507 $19,958 7/16 $16,592 $16,557 $21,077 Call 1-800-225-6292 or visit us.pioneerinvestments.com for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. Class C shares held for less than one year are also subject to a 1% contingent deferred sales charge (CDSC). "If Held" results represent the percent change in net asset value per share. Returns would have been lower had sales charges been reflected. All results are historical and assume the reinvestment of dividends and capital gains. Other share classes are available for which performance and expenses will differ. Performance results reflect any applicable expense waivers in effect during the periods shown. Without such waivers Fund performance would be lower. Waivers may not be in effect for all funds. Certain fee waivers are contractual through a specified period. Otherwise, fee waivers can be rescinded at any time. See the prospectus and financial statements for more information. Please see the financial highlights for more recent expense ratios. 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. 14 Pioneer Classic Balanced Fund | Annual Report | 7/31/16 Performance Update | 7/31/16 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 Classic Balanced Fund during the periods shown, compared to that of the Standard & Poor's 500 Index and Barclays Government/Credit Bond Index. Average Annual Total Returns (As of July 31, 2016) -------------------------------------------------------------------------------- Barclays Govern- Net ment/ Standard Asset Credit & Poor's Value Bond 500 Period (NAV) Index Index -------------------------------------------------------------------------------- 10 Years 6.08% 5.17% 7.74% 5 Years 7.97 3.88 13.36 1 Year 0.87 6.78 5.60 -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated December 1, 2015) -------------------------------------------------------------------------------- Gross -------------------------------------------------------------------------------- 0.89% -------------------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $5 Million Investment Pioneer Barclays Standard & Classic Government/ Poor's 500 Balanced Fund Credit Bond Index Index 7/06 $5,000,000 $5,000,000 $ 5,000,000 7/07 $5,521,060 $5,284,238 $ 5,806,246 7/08 $5,105,806 $5,610,777 $ 5,162,285 7/09 $4,852,942 $6,011,304 $ 4,132,450 7/10 $5,341,890 $6,548,941 $ 4,704,517 7/11 $6,146,796 $6,845,244 $ 5,628,859 7/12 $6,393,028 $7,423,314 $ 6,141,404 7/13 $7,365,637 $7,275,198 $ 7,675,672 7/14 $8,369,560 $7,560,916 $ 8,974,519 7/15 $8,940,892 $7,753,312 $ 9,979,210 7/16 $9,018,627 $8,278,635 $10,538,479 Call 1-800-225-6292 or visit us.pioneerinvestments.com for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. The performance shown for Class K shares for the period prior to the commencement of operations of Class K shares on December 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. Please see the financial highlights for more recent expense ratios. 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. Pioneer Classic Balanced Fund | Annual Report | 7/31/16 15 Performance Update | 7/31/16 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 Classic Balanced Fund during the periods shown, compared to that of the Standard & Poor's 500 Index and Barclays Government/Credit Bond Index. Average Annual Total Returns (As of July 31, 2016) -------------------------------------------------------------------------------- Barclays Govern- Net ment/ Standard Asset Credit & Poor's Value Bond 500 Period (NAV) Index Index -------------------------------------------------------------------------------- 10 Years 6.05% 5.17% 7.74% 5 Years 7.93 3.88 13.36 1 Year 0.67 6.78 5.60 -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated December 1, 2015) -------------------------------------------------------------------------------- Gross Net -------------------------------------------------------------------------------- 1.64% 1.39% -------------------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $10,000 Investment Pioneer Barclays Standard & Classic Government/ Poor's 500 Balanced Fund Credit Bond Index Index 7/06 $10,000 $10,000 $10,000 7/07 $11,042 $10,568 $11,612 7/08 $10,212 $11,222 $10,325 7/09 $9,706 $12,023 $ 8,265 7/10 $10,684 $13,098 $ 9,409 7/11 $12,294 $13,690 $11,258 7/12 $12,786 $14,847 $12,283 7/13 $14,731 $14,550 $15,351 7/14 $16,739 $15,122 $17,949 7/15 $17,882 $15,507 $19,958 7/16 $18,001 $16,557 $21,077 Call 1-800-225-6292 or visit us.pioneerinvestments.com for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. The performance shown for Class R shares for the period prior to the commencement of operations of Class R shares on July 1, 2015, is the net asset value performance of the Fund's Class A shares, which has not been restated to reflect any differences in expenses, including Rule 12b-1 fees applicable to Class A shares. Since fees for Class A shares generally are higher than those of Class R shares, the performance of Class R shares prior to their inception would have been higher than the performance shown. For the period beginning July 1, 2015, the actual performance of Class R shares is reflected. Class R shares are not subject to sales charges and are available for limited groups of eligible investors, including institutional investors. All results are historical and assume the reinvestment of dividends and capital gains. Other share classes are available for which performance and expenses will differ. The net expense ratio reflects the contractual expense limitation currently in effect through December 1, 2017, for Class R shares. There can be no assurance that Pioneer will extend the expense limitation beyond such time. Please see the prospectus and financial statements for more information. Please see the financial highlights for more recent expense ratios. Expense ratios in the financial highlights, unlike those shown in the prospectus, do not reflect acquired fund fees and expenses. Performance results reflect any applicable expense waivers in effect during the periods shown. Without such waivers, Fund performance would be lower. Waivers may not be in effect for all funds. Certain fee waivers are contractual through a specified period. Otherwise, fee waivers can be rescinded at any time. See the prospectus and financial statements for more information. The performance table and graph do not reflect the deduction of fees and taxes that a shareowner would pay on Fund distributions or the redemption of Fund shares. 16 Pioneer Classic Balanced Fund | Annual Report | 7/31/16 Performance Update | 7/31/16 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 Classic Balanced Fund during the periods shown, compared to that of the Standard & Poor's 500 Index and Barclays Government/Credit Bond Index. Average Annual Total Returns (As of July 31, 2016) -------------------------------------------------------------------------------- Barclays Govern- Net ment/ Standard Asset Credit & Poor's Value Bond 500 Period (NAV) Index Index -------------------------------------------------------------------------------- 10 Years 6.39% 5.17% 7.74% 5 Years 8.26 3.88 13.36 1 Year 0.95 6.78 5.60 -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated December 1, 2015) -------------------------------------------------------------------------------- Gross -------------------------------------------------------------------------------- 1.02% -------------------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $5 Million Investment Pioneer Barclays Standard & Classic Government/ Poor's 500 Balanced Fund Credit Bond Index Index 7/06 $5,000,000 $5,000,000 $ 5,000,000 7/07 $5,540,867 $5,284,238 $ 5,806,246 7/08 $5,139,323 $5,610,777 $ 5,162,285 7/09 $4,901,725 $6,011,304 $ 4,132,450 7/10 $5,420,349 $6,548,941 $ 4,704,517 7/11 $6,249,408 $6,845,244 $ 5,628,859 7/12 $6,524,549 $7,423,314 $ 6,141,404 7/13 $7,549,778 $7,275,198 $ 7,675,672 7/14 $8,589,543 $7,560,916 $ 8,974,519 7/15 $9,205,748 $7,753,312 $ 9,979,210 7/16 $9,293,276 $8,278,635 $10,538,479 Call 1-800-225-6292 or visit us.pioneerinvestments.com for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. Class Y shares are not subject to sales charges and are available for limited groups of eligible investors, including institutional investors. All results are historical and assume the reinvestment of dividends and capital gains. Other share classes are available for which performance and expenses will differ. Performance results reflect any applicable expense waivers in effect during the periods shown. Without such waivers Fund performance would be lower. Waivers may not be in effect for all funds. Certain fee waivers are contractual through a specified period. Otherwise, fee waivers can be rescinded at any time. See the prospectus and financial statements for more information. Please see the financial highlights for more recent expense ratios. 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. Pioneer Classic Balanced Fund | Annual Report | 7/31/16 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 Classic Balanced Fund Based on actual returns from February 1, 2016 through July 31, 2016. ------------------------------------------------------------------------------------------------------- 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 2/1/16 ------------------------------------------------------------------------------------------------------- Ending Account $1,076.86 $1,072.47 $1,076.96 $1,075.65 $1,076.34 Value (after expenses) on 7/31/16 ------------------------------------------------------------------------------------------------------- Expenses Paid $ 5.99 $ 9.95 $ 5.06 $ 6.71 $ 4.90 During Period* ------------------------------------------------------------------------------------------------------- * Expenses are equal to the Fund's annualized expense ratio of 1.16%, 1.93%, 0.98%, 1.30%, and 0.95% for Class A, Class C, Class K, Class R, and Class Y shares, respectively, multiplied by the average account value over the period multiplied by 182/366 (to reflect the one-half year period). 18 Pioneer Classic Balanced Fund | Annual Report | 7/31/16 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 Classic Balanced Fund Based on a hypothetical 5% return per year before expenses, reflecting the period from February 1, 2016 through July 31, 2016. ------------------------------------------------------------------------------------------------------- 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 2/1/16 ------------------------------------------------------------------------------------------------------- Ending Account $1,019.10 $1,015.27 $1,019.99 $1,018.40 $1,020.14 Value (after expenses) on 7/31/16 ------------------------------------------------------------------------------------------------------- Expenses Paid $ 5.82 $ 9.67 $ 4.92 $ 6.52 $ 4.77 During Period* ------------------------------------------------------------------------------------------------------- * Expenses are equal to the Fund's annualized expense ratio of 1.16%, 1.93%, 0.98%, 1.30%, and 0.95% for Class A, Class C, Class K, Class R, and Class Y shares, respectively, multiplied by the average account value over the period multiplied by 182/366 (to reflect the one-half year period). Pioneer Classic Balanced Fund | Annual Report | 7/31/16 19 Schedule of Investments | 7/31/16 ---------------------------------------------------------------------------------------------------- Floating Rate (b) (unaudited) Value ---------------------------------------------------------------------------------------------------- PREFERRED STOCK -- 0.0%+ BANKS -- 0.0%+ Diversified Banks -- 0.0%+ 779 7.01 Citigroup Capital XIII, Floating Rate Note, 10/30/40 $ 20,402 ---------------------------------------------------------------------------------------------------- TOTAL PREFERRED STOCK (Cost $21,072) $ 20,402 ---------------------------------------------------------------------------------------------------- CONVERTIBLE PREFERRED STOCK -- 0.3% BANKS -- 0.3% Diversified Banks -- 0.3% 700 Wells Fargo & Co., 7.5% (Perpetual) $ 931,882 ---------------------------------------------------------------------------------------------------- TOTAL CONVERTIBLE PREFERRED STOCK (Cost $730,069) $ 931,882 ---------------------------------------------------------------------------------------------------- ---------------------------------------------------------------------------------------------------- Shares ---------------------------------------------------------------------------------------------------- COMMON STOCKS -- 61.9% ENERGY -- 4.1% Oil & Gas Equipment & Services -- 0.8% 51,580 Halliburton Co. $ 2,251,983 ---------------------------------------------------------------------------------------------------- Integrated Oil & Gas -- 1.9% 41,248 Chevron Corp. $ 4,227,095 19,585 Occidental Petroleum Corp. 1,463,587 -------------- $ 5,690,682 ---------------------------------------------------------------------------------------------------- Oil & Gas Refining & Marketing -- 0.4% 15,922 Phillips 66 $ 1,211,027 ---------------------------------------------------------------------------------------------------- Oil & Gas Storage & Transportation -- 1.0% 47,773 Spectra Energy Corp. $ 1,718,395 29,715 Targa Resources Corp. 1,107,181 -------------- $ 2,825,576 -------------- Total Energy $ 11,979,268 ---------------------------------------------------------------------------------------------------- MATERIALS -- 0.2% Fertilizers & Agricultural Chemicals -- 0.2% 5,215 Agrium, Inc. $ 473,313 -------------- Total Materials $ 473,313 ---------------------------------------------------------------------------------------------------- CAPITAL GOODS -- 4.0% Aerospace & Defense -- 1.5% 16,003 Honeywell International, Inc. $ 1,861,629 17,853 Raytheon Co. 2,491,029 -------------- $ 4,352,658 ---------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 20 Pioneer Classic Balanced Fund | Annual Report | 7/31/16 ---------------------------------------------------------------------------------------------------- Shares Value ---------------------------------------------------------------------------------------------------- Industrial Machinery -- 2.5% 59,637 Ingersoll-Rand Plc $ 3,951,548 20,444 Snap-on, Inc. 3,213,183 -------------- $ 7,164,731 -------------- Total Capital Goods $ 11,517,389 ---------------------------------------------------------------------------------------------------- COMMERCIAL SERVICES & SUPPLIES -- 2.3% Diversified Support Services -- 1.8% 36,200 G&K Services, Inc. $ 2,903,602 57,121 KAR Auction Services, Inc. 2,443,065 -------------- $ 5,346,667 ---------------------------------------------------------------------------------------------------- Research & Consulting Services -- 0.5% 27,236 Nielsen Holdings Plc $ 1,466,931 -------------- Total Commercial Services & Supplies $ 6,813,598 ---------------------------------------------------------------------------------------------------- TRANSPORTATION -- 0.4% Railroads -- 0.4% 40,385 CSX Corp. $ 1,144,107 -------------- Total Transportation $ 1,144,107 ---------------------------------------------------------------------------------------------------- CONSUMER SERVICES -- 1.7% Leisure Facilities -- 0.7% 34,541 Cedar Fair LP $ 2,044,827 ---------------------------------------------------------------------------------------------------- Restaurants -- 1.0% 24,846 McDonald's Corp. $ 2,923,132 -------------- Total Consumer Services $ 4,967,959 ---------------------------------------------------------------------------------------------------- MEDIA -- 2.7% Broadcasting -- 1.0% 40,756 CBS Corp. (Class B) $ 2,128,278 73,107 Gannett Co., Inc. 932,845 -------------- $ 3,061,123 ---------------------------------------------------------------------------------------------------- Movies & Entertainment -- 1.7% 62,451 Regal Entertainment Group $ 1,468,848 44,083 Time Warner, Inc. 3,378,962 -------------- $ 4,847,810 -------------- Total Media $ 7,908,933 ---------------------------------------------------------------------------------------------------- RETAILING -- 4.2% General Merchandise Stores -- 1.4% 44,533 Dollar General Corp.* $ 4,219,056 ---------------------------------------------------------------------------------------------------- Home Improvement Retail -- 2.3% 48,361 The Home Depot, Inc. $ 6,685,425 ---------------------------------------------------------------------------------------------------- Automotive Retail -- 0.5% 7,780 Advance Auto Parts, Inc. $ 1,321,511 -------------- Total Retailing $ 12,225,992 ---------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Classic Balanced Fund | Annual Report | 7/31/16 21 Schedule of Investments | 7/31/16 (continued) ---------------------------------------------------------------------------------------------------- Shares Value ---------------------------------------------------------------------------------------------------- FOOD & STAPLES RETAILING -- 1.5% Drug Retail -- 1.5% 46,811 CVS Health Corp. $ 4,340,316 -------------- Total Food & Staples Retailing $ 4,340,316 ---------------------------------------------------------------------------------------------------- FOOD, BEVERAGE & TOBACCO -- 5.9% Brewers -- 0.6% 16,404 Molson Coors Brewing Co. (Class B) $ 1,675,833 ---------------------------------------------------------------------------------------------------- Soft Drinks -- 1.2% 79,303 The Coca-Cola Co. $ 3,459,990 ---------------------------------------------------------------------------------------------------- Packaged Foods & Meats -- 2.7% 13,277 Kellogg Co. $ 1,098,141 26,730 Mead Johnson Nutrition Co. 2,384,316 40,165 The Hershey Co. 4,448,675 -------------- $ 7,931,132 ---------------------------------------------------------------------------------------------------- Tobacco -- 1.4% 39,248 Altria Group, Inc. $ 2,657,090 27,100 Reynolds American, Inc. 1,356,626 -------------- $ 4,013,716 -------------- Total Food, Beverage & Tobacco $ 17,080,671 ---------------------------------------------------------------------------------------------------- HEALTH CARE EQUIPMENT & SERVICES -- 2.3% Health Care Equipment -- 1.6% 52,577 Medtronic Plc $ 4,607,323 ---------------------------------------------------------------------------------------------------- Managed Health Care -- 0.7% 11,777 Humana, Inc. $ 2,032,121 -------------- Total Health Care Equipment & Services $ 6,639,444 ---------------------------------------------------------------------------------------------------- PHARMACEUTICALS, BIOTECHNOLOGY & LIFE SCIENCES -- 8.4% Biotechnology -- 2.1% 30,227 Celgene Corp.* $ 3,391,167 36,049 Gilead Sciences, Inc.* 2,864,814 -------------- $ 6,255,981 ---------------------------------------------------------------------------------------------------- Pharmaceuticals -- 6.3% 46,548 AstraZeneca Plc (A.D.R.) $ 1,589,149 39,695 Johnson & Johnson 4,971,005 264,886 Pfizer, Inc. 9,771,644 38,140 Zoetis, Inc. 1,924,926 -------------- $ 18,256,724 -------------- Total Pharmaceuticals, Biotechnology & Life Sciences $ 24,512,705 ---------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 22 Pioneer Classic Balanced Fund | Annual Report | 7/31/16 ---------------------------------------------------------------------------------------------------- Shares Value ---------------------------------------------------------------------------------------------------- BANKS -- 4.0% Diversified Banks -- 3.1% 179,753 Bank of America Corp. $ 2,604,621 131,728 Wells Fargo & Co. 6,318,992 -------------- $ 8,923,613 ---------------------------------------------------------------------------------------------------- Regional Banks -- 0.9% 33,490 The PNC Financial Services Group, Inc. $ 2,767,948 -------------- Total Banks $ 11,691,561 ---------------------------------------------------------------------------------------------------- DIVERSIFIED FINANCIALS -- 3.6% Specialized Finance -- 1.0% 29,253 CME Group, Inc. $ 2,990,827 ---------------------------------------------------------------------------------------------------- Consumer Finance -- 0.8% 21,470 Discover Financial Services, Inc. $ 1,220,355 39,807 Synchrony Financial 1,109,819 -------------- $ 2,330,174 ---------------------------------------------------------------------------------------------------- Asset Management & Custody Banks -- 1.3% 107,845 Ares Capital Corp. $ 1,632,773 48,744 Golub Capital BDC, Inc. 928,086 79,470 TCP Capital Corp. 1,263,573 -------------- $ 3,824,432 ---------------------------------------------------------------------------------------------------- Investment Banking & Brokerage -- 0.5% 40,272 Lazard, Ltd. $ 1,439,321 -------------- Total Diversified Financials $ 10,584,754 ---------------------------------------------------------------------------------------------------- REAL ESTATE -- 2.7% Hotel & Resort REIT -- 1.0% 113,179 Chesapeake Lodging Trust $ 2,860,033 ---------------------------------------------------------------------------------------------------- Specialized REIT -- 1.7% 63,206 Iron Mountain Inc. $ 2,604,719 24,914 Lamar Advertising Co. 1,690,664 35,736 Outfront Media, Inc. 831,577 -------------- $ 5,126,960 -------------- Total Real Estate $ 7,986,993 ---------------------------------------------------------------------------------------------------- SOFTWARE & SERVICES -- 8.1% Internet Software & Services -- 4.2% 9,185 Alphabet, Inc. (Class A) $ 7,268,458 2,599 Alphabet, Inc. (Class C) 1,998,085 94,223 eBay, Inc.* 2,935,989 -------------- $ 12,202,532 ---------------------------------------------------------------------------------------------------- Data Processing & Outsourced Services -- 0.4% 33,169 PayPal Holdings, Inc. $ 1,235,214 ---------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Classic Balanced Fund | Annual Report | 7/31/16 23 Schedule of Investments | 7/31/16 (continued) ---------------------------------------------------------------------------------------------------- Shares Value ----------------------------------------------------------------------------------------------------- Systems Software -- 3.5% 11,501 Check Point Software Technologies, Ltd.* $ 884,197 165,584 Microsoft Corp. 9,385,301 -------------- $ 10,269,498 -------------- Total Software & Services $ 23,707,244 ---------------------------------------------------------------------------------------------------- TECHNOLOGY HARDWARE & EQUIPMENT -- 2.4% Communications Equipment -- 0.8% 77,891 Cisco Systems, Inc. $ 2,378,012 ---------------------------------------------------------------------------------------------------- Computer Storage & Peripherals -- 1.6% 43,791 Apple, Inc. $ 4,563,460 -------------- Total Technology Hardware & Equipment $ 6,941,472 ---------------------------------------------------------------------------------------------------- SEMICONDUCTORS & SEMICONDUCTOR EQUIPMENT -- 2.0% Semiconductor Equipment -- 0.4% 11,644 Lam Research Corp.* $ 1,045,282 ---------------------------------------------------------------------------------------------------- Semiconductors -- 1.6% 22,793 Analog Devices, Inc. $ 1,454,877 40,432 Microchip Technology, Inc. 2,249,636 77,354 Micron Technology, Inc.* 1,062,844 -------------- $ 4,767,357 -------------- Total Semiconductors & Semiconductor Equipment $ 5,812,639 ---------------------------------------------------------------------------------------------------- TELECOMMUNICATION SERVICES -- 1.0% Integrated Telecommunication Services -- 1.0% 52,252 Verizon Communications, Inc. $ 2,895,283 -------------- Total Telecommunication Services $ 2,895,283 ---------------------------------------------------------------------------------------------------- UTILITIES -- 0.4% Multi-Utilities -- 0.4% 26,022 CMS Energy Corp. $ 1,175,674 -------------- Total Utilities $ 1,175,674 ---------------------------------------------------------------------------------------------------- TOTAL COMMON STOCKS (Cost $152,466,358) $ 180,399,315 ---------------------------------------------------------------------------------------------------- ---------------------------------------------------------------------------------------------------- Floating Principal Rate (b) Amount ($) (unaudited) ---------------------------------------------------------------------------------------------------- ASSET BACKED SECURITIES -- 1.7% BANKS -- 1.3% Thrifts & Mortgage Finance -- 1.3% 250,000 Ascentium Equipment Receivables 2015-1 LLC, 3.24%, 1/10/22 (144A) $ 251,214 64,280 0.99 Bayview Financial Mortgage Pass-Through Trust 2005-C, Floating Rate Note, 6/28/44 63,976 150,000 California Republic Auto Receivables Trust 2014-3, 3.61%, 6/15/21 151,240 The accompanying notes are an integral part of these financial statements. 24 Pioneer Classic Balanced Fund | Annual Report | 7/31/16 ---------------------------------------------------------------------------------------------------- Floating Principal Rate (b) Amount ($) (unaudited) Value ---------------------------------------------------------------------------------------------------- Thrifts & Mortgage Finance -- (continued) 55,949 Consumer Credit Origination Loan Trust 2015-1, 2.82%, 3/15/21 (144A) $ 56,001 250,000 CRG Issuer 2015-1, 4.07%, 7/11/22 (144A) 248,125 250,000 Flagship Credit Auto Trust 2013-1, 5.38%, 7/15/20 (144A) 249,172 158,893 FNA 2015-1 Trust, 3.24%, 12/10/23 (144A) 158,387 118,993 GO Financial Auto Securitization Trust 2015-2, 3.27%, 11/15/18 (144A) 118,729 250,000 Green Tree Agency Advance Funding Trust I, 4.6692%, 10/15/48 (144A) 250,100 189,803 Nations Equipment Finance Funding II LLC, 3.276%, 1/22/19 (144A) 187,736 350,000 Navitas Equipment Receivables LLC 2015-1, 4.5%, 5/17/21 (144A) 355,968 265,000 2.06 NovaStar Mortgage Funding Trust Series 2004-3, Floating Rate Note, 12/25/34 251,239 435,000 1.08 PFS Financing Corp., Floating Rate Note, 2/15/19 (144A) 434,514 149,896 STORE Master Funding LLC, 5.77%, 8/20/42 (144A) 157,070 375,989 SVO 2012-A VOI Mortgage LLC, 2.0%, 9/20/29 (144A) 371,740 70,856 VOLT XIX LLC, 3.875%, 4/26/55 (Step) (144A) 70,881 283,598 Westgate Resorts 2016-1 LLC, 4.5%, 12/20/28 (144A) 281,612 -------------- $ 3,657,704 -------------- Total Banks $ 3,657,704 ---------------------------------------------------------------------------------------------------- DIVERSIFIED FINANCIALS -- 0.4% Other Diversified Financial Services -- 0.3% 500,000 American Credit Acceptance Receivables Trust 2014-1, 5.2%, 4/12/21 (144A) $ 497,106 250,000 American Credit Acceptance Receivables Trust 2014-2, 4.96%, 5/10/21 (144A) 253,647 99,989 AXIS Equipment Finance Receivables II LLC, 3.81%, 4/20/18 (144A) 100,319 -------------- $ 851,072 ---------------------------------------------------------------------------------------------------- Consumer Finance -- 0.1% 250,000 AmeriCredit Automobile Receivables Trust 2012-4, 3.82%, 2/10/20 (144A) $ 252,021 -------------- Total Diversified Financials $ 1,103,093 ---------------------------------------------------------------------------------------------------- GOVERNMENT -- 0.0%+ 114,358 2.49 Fannie Mae Connecticut Avenue Securities, Floating Rate Note, 10/25/23 $ 115,396 -------------- Total Government $ 115,396 ---------------------------------------------------------------------------------------------------- TOTAL ASSET BACKED SECURITIES (Cost $4,900,427) $ 4,876,193 ---------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Classic Balanced Fund | Annual Report | 7/31/16 25 Schedule of Investments | 7/31/16 (continued) ---------------------------------------------------------------------------------------------------- Floating Principal Rate (b) Amount ($) (unaudited) Value ---------------------------------------------------------------------------------------------------- COLLATERALIZED MORTGAGE OBLIGATIONS -- 3.4% BANKS -- 2.5% Thrifts & Mortgage Finance -- 2.5% 330,000 2.68 BAMLL Commercial Mortgage Securities Trust 2014-FL1, Floating Rate Note, 12/17/31 (144A) $ 330,802 200,000 2.39 BAMLL Commercial Mortgage Securities Trust 2014-INLD, Floating Rate Note, 12/17/29 (144A) 197,672 26,673 Banc of America Mortgage Trust 2004-11, 5.75%, 1/25/35 27,059 30,009 4.99 Bear Stearns Commercial Mortgage Securities Trust 2005-PWR9, Floating Rate Note, 9/11/42 30,071 600,000 2.98 CDGJ Commercial Mortgage Trust 2014-BXCH, Floating Rate Note, 12/15/27 (144A) 593,605 300,000 Citigroup Commercial Mortgage Trust 2014-GC25 REMICS, 3.371%, 10/11/47 320,696 168,000 COMM 2012-CCRE4 Mortgage Trust, 2.436%, 10/17/45 172,064 64,000 Credit Suisse First Boston Mortgage Securities Corp., 4.877%, 4/15/37 58,157 485,482 3.50 CSMC Trust 2014-WIN2, Floating Rate Note, 10/25/44 (144A) 498,558 420,000 3.93 GAHR Commercial Mortgage Trust 2015-NRF, Floating Rate Note, 12/15/34 (144A) 428,296 60,119 Global Mortgage Securitization, Ltd., 5.25%, 4/25/32 (144A) 58,077 500,000 GS Mortgage Securities Corp. II, 3.377%, 5/10/45 537,291 176,980 1.07 Impac CMB Trust Series 2004-4, Floating Rate Note, 9/25/34 167,813 500,000 JP Morgan Chase Commercial Mortgage Securities Corp., 2.84%, 12/15/47 526,788 200,520 JP Morgan Chase Commercial Mortgage Securities Trust 2010-C2, 3.6159%, 11/15/43 (144A) 204,915 450,000 1.40 JP Morgan Chase Commercial Mortgage Securities Trust 2014-INN, Floating Rate Note, 6/15/29 (144A) 446,618 876,433 3.00 JP Morgan Mortgage Trust 2014-2, Floating Rate Note, 6/25/29 (144A) 902,042 30,177 1.27 Merrill Lynch Mortgage Investors Trust Series MLCC 2004-D REMICS, Floating Rate Note, 9/25/29 26,277 566,930 3.25 NRP Mortgage Trust 2013-1, Floating Rate Note, 7/25/43 (144A) 582,010 38,860 RALI Series 2004-QS3 Trust, 5.0%, 3/25/19 38,731 63,598 2.25 Sequoia Mortgage Trust 2013-8, Floating Rate Note, 6/25/43 63,661 647,550 3.00 Sequoia Mortgage Trust 2013-8, Floating Rate Note, 6/25/43 659,287 86,878 3.32 Structured Adjustable Rate Mortgage Loan Trust Class 1A1, Floating Rate Note, 3/25/34 86,048 The accompanying notes are an integral part of these financial statements. 26 Pioneer Classic Balanced Fund | Annual Report | 7/31/16 ---------------------------------------------------------------------------------------------------- Floating Principal Rate (b) Amount ($) (unaudited) Value ----------------------------------------------------------------------------------------------------- Thrifts & Mortgage Finance -- (continued) 359,405 2.88 Velocity Commercial Capital Loan Trust 2015-1, Floating Rate Note, 6/25/45 (144A) $ 361,202 -------------- $ 7,317,740 -------------- Total Banks $ 7,317,740 ---------------------------------------------------------------------------------------------------- GOVERNMENT -- 0.9% 238,456 Fannie Mae, Series 2011-25 Class KA, 3.0%, 1/25/24 $ 243,580 781,494 Federal Home Loan Mortgage Corp., REMICS, 3.5%, 11/15/25 853,731 88,141 1.09 Federal Home Loan Mortgage Corp., REMICS, Floating Rate Note, 2/15/24 90,301 69,877 0.84 Federal Home Loan Mortgage Corp., REMICS, Floating Rate Note, 5/15/41 69,878 44,008 Federal Home Loan Mortgage Corp., 3.0%, 10/15/38 45,237 57,461 0.77 Federal National Mortgage Association REMICS, Floating Rate Note, 11/25/36 57,297 81,617 0.75 Federal National Mortgage Association REMICS, Floating Rate Note, 4/25/36 81,368 224,441 0.90 Federal National Mortgage Association REMICS, Floating Rate Note, 7/25/41 224,976 35,603 1.00 Federal National Mortgage Association REMICS, Floating Rate Note, 9/25/37 36,011 148,532 Freddie Mac, 2.5%, 8/15/25 150,708 361,913 Freddie Mac, 3.5%, 10/15/28 368,412 317,945 Freddie Mac, Series 3227 Class PR, 5.5%, 9/15/35 324,581 109,000 3.82 FREMF Mortgage Trust Class B, Floating Rate Note, 6/25/47 (144A) 113,337 41,954 0.95 Government National Mortgage Association, Floating Rate Note, 11/20/30 42,251 -------------- $ 2,701,668 -------------- Total Government $ 2,701,668 ---------------------------------------------------------------------------------------------------- TOTAL COLLATERALIZED MORTGAGE OBLIGATIONS (Cost $9,875,919) $ 10,019,408 ---------------------------------------------------------------------------------------------------- CORPORATE BONDS -- 17.9% ENERGY -- 3.0% Oil & Gas Drilling -- 0.2% 235,000 Ensco Plc, 4.5%, 10/1/24 $ 161,562 240,000 Pride International, Inc., 6.875%, 8/15/20 227,550 100,000 Rowan Companies, Inc., 4.75%, 1/15/24 82,000 51,000 Rowan Companies, Inc., 5.85%, 1/15/44 36,848 -------------- $ 507,960 ---------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Classic Balanced Fund | Annual Report | 7/31/16 27 Schedule of Investments | 7/31/16 (continued) ---------------------------------------------------------------------------------------------------- Floating Principal Rate (b) Amount ($) (unaudited) Value ---------------------------------------------------------------------------------------------------- Integrated Oil & Gas -- 0.4% 250,000 ConocoPhillips Co., 2.875%, 11/15/21 $ 252,821 175,000 Exxon Mobil Corp., 2.397%, 3/6/22 181,194 185,000 Petroleos Mexicanos, 3.5%, 1/30/23 175,288 250,000 Sinopec Group Overseas Development 2014, Ltd., 4.375%, 4/10/24 (144A) 274,568 250,000 Statoil ASA, 2.9%, 11/8/20 262,462 -------------- $ 1,146,333 ---------------------------------------------------------------------------------------------------- Oil & Gas Exploration & Production -- 0.2% 213,000 Canadian Natural Resources, Ltd., 6.25%, 3/15/38 $ 226,406 35,000 Canadian Natural Resources, Ltd., 6.75%, 2/1/39 39,171 200,000 Dolphin Energy, Ltd., 5.5%, 12/15/21 (144A) 227,994 -------------- $ 493,571 ---------------------------------------------------------------------------------------------------- Oil & Gas Refining & Marketing -- 0.4% 300,000 GS Caltex Corp., 3.25%, 10/1/18 (144A) $ 308,841 360,000 Motiva Enterprises LLC, 5.75%, 1/15/20 (144A) 396,499 370,000 Valero Energy Corp., 9.375%, 3/15/19 439,639 -------------- $ 1,144,979 ---------------------------------------------------------------------------------------------------- Oil & Gas Storage & Transportation -- 1.7% 250,000 Boardwalk Pipelines LP, 4.95%, 12/15/24 $ 247,284 330,000 Boardwalk Pipelines LP, 5.5%, 2/1/17 335,726 750,000 Boardwalk Pipelines LP, 5.95%, 6/1/26 785,632 183,000 Buckeye Partners LP, 5.85%, 11/15/43 181,547 200,000 DCP Midstream LLC, 9.75%, 3/15/19 (144A) 220,000 220,000 5.85 DCP Midstream LLC, Floating Rate Note, 5/21/43 (144A) 166,100 250,000 1.28 Enbridge, Inc., Floating Rate Note, 10/1/16 249,291 250,000 Energy Transfer Partners LP, 2.5%, 6/15/18 251,972 250,000 Enterprise Products Operating LLC, 2.55%, 10/15/19 257,322 200,000 Kinder Morgan, Inc., Delaware, 3.05%, 12/1/19 205,058 105,000 MPLX LP, 4.875%, 12/1/24 (144A) 103,980 55,000 MPLX LP, 4.875%, 6/1/25 (144A) 54,951 105,000 MPLX LP, 5.5%, 2/15/23 (144A) 108,192 165,000 ONEOK Partners LP, 6.15%, 10/1/16 166,066 75,000 Plains All American Pipeline LP, 4.65%, 10/15/25 75,110 250,000 Plains All American Pipeline LP, 4.9%, 2/15/45 225,720 425,000 Questar Pipeline Co., 5.83%, 2/1/18 451,791 200,000 Spectra Energy Capital LLC, 6.75%, 7/15/18 214,187 175,000 Sunoco Logistics Partners Operations LP, 3.9%, 7/15/26 173,928 100,000 The Williams Companies, Inc., 5.75%, 6/24/44 91,750 242,000 The Williams Companies, Inc., 7.75%, 6/15/31 262,570 100,000 TransCanada PipeLines, Ltd., 1.875%, 1/12/18 100,568 200,000 6.35 TransCanada PipeLines, Ltd., Floating Rate Note, 5/15/67 150,126 -------------- $ 5,078,871 ---------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 28 Pioneer Classic Balanced Fund | Annual Report | 7/31/16 ---------------------------------------------------------------------------------------------------- Floating Principal Rate (b) Amount ($) (unaudited) Value ---------------------------------------------------------------------------------------------------- Coal & Consumable Fuels -- 0.1% 250,000 Corp Nacional del Cobre de Chile, 5.625%, 10/18/43 (144A) $ 298,301 -------------- Total Energy $ 8,670,015 ---------------------------------------------------------------------------------------------------- MATERIALS -- 0.9% Fertilizers & Agricultural Chemicals -- 0.2% 250,000 Agrium, Inc., 4.125%, 3/15/35 $ 247,175 250,000 FMC Corp., 4.1%, 2/1/24 266,781 200,000 Monsanto Co., 1.15%, 6/30/17 199,899 -------------- $ 713,855 ---------------------------------------------------------------------------------------------------- Industrial Gases -- 0.1% 250,000 Praxair Inc., 2.65%, 2/5/25 $ 260,422 ---------------------------------------------------------------------------------------------------- Specialty Chemicals -- 0.0%+ 100,000 The Valspar Corp., 3.3%, 2/1/25 $ 102,847 ---------------------------------------------------------------------------------------------------- Construction Materials -- 0.1% 125,000 Holcim US Finance S.a.r.l. & Cie SCS, 6.0%, 12/30/19 (144A) $ 139,935 ---------------------------------------------------------------------------------------------------- Metal & Glass Containers -- 0.1% 175,000 Ball Corp., 4.0%, 11/15/23 $ 177,625 ---------------------------------------------------------------------------------------------------- Paper Packaging -- 0.2% 250,000 International Paper Co., 3.8%, 1/15/26 $ 268,867 250,000 International Paper Co., 6.0%, 11/15/41 301,016 -------------- $ 569,883 ---------------------------------------------------------------------------------------------------- Diversified Metals & Mining -- 0.0%+ 60,000 Amsted Industries, Inc., 5.375%, 9/15/24 (144A) $ 60,000 ---------------------------------------------------------------------------------------------------- Steel -- 0.2% 200,000 Glencore Funding LLC, 4.125%, 5/30/23 (144A) $ 192,600 250,000 Reliance Steel & Aluminum Co., 4.5%, 4/15/23 259,411 150,000 Worthington Industries, Inc., 4.55%, 4/15/26 156,834 -------------- $ 608,845 -------------- Total Materials $ 2,633,412 ---------------------------------------------------------------------------------------------------- CAPITAL GOODS -- 0.9% Aerospace & Defense -- 0.3% 155,000 DigitalGlobe, Inc., 5.25%, 2/1/21 (144A) $ 149,962 100,000 Lockheed Martin Corp., 3.1%, 1/15/23 106,306 200,000 Rockwell Collins, Inc., 3.7%, 12/15/23 218,831 185,000 Spirit AeroSystems, Inc., 3.85%, 6/15/26 195,506 250,000 United Technologies Corp., 1.778%, 5/4/18 (Step) 252,076 -------------- $ 922,681 ---------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Classic Balanced Fund | Annual Report | 7/31/16 29 Schedule of Investments | 7/31/16 (continued) ---------------------------------------------------------------------------------------------------- Floating Principal Rate (b) Amount ($) (unaudited) Value ---------------------------------------------------------------------------------------------------- Building Products -- 0.2% 450,000 Masco Corp., 4.45%, 4/1/25 $ 478,125 175,000 5.75 Stanley Black & Decker, Inc., Floating Rate Note, 12/15/53 185,990 -------------- $ 664,115 ---------------------------------------------------------------------------------------------------- Construction & Engineering -- 0.1% 85,000 Amsted Industries, Inc., 5.0%, 3/15/22 (144A) $ 85,850 51,000 Valmont Industries, Inc., 6.625%, 4/20/20 58,105 -------------- $ 143,955 ---------------------------------------------------------------------------------------------------- Industrial Conglomerates -- 0.1% 200,000 3M Co., 1.625%, 6/15/19 $ 203,502 ---------------------------------------------------------------------------------------------------- Construction & Farm Machinery & Heavy Trucks -- 0.2% 250,000 Cummins, Inc., 5.65%, 3/1/98 $ 281,607 250,000 Wabtec Corp. Delaware, 4.375%, 8/15/23 276,287 -------------- $ 557,894 -------------- Total Capital Goods $ 2,492,147 ---------------------------------------------------------------------------------------------------- COMMERCIAL SERVICES & SUPPLIES -- 0.1% Environmental & Facilities Services -- 0.0%+ 75,000 Republic Services, Inc., 2.9%, 7/1/26 $ 76,973 ---------------------------------------------------------------------------------------------------- Research & Consulting Services -- 0.1% 186,000 Verisk Analytics, Inc., 5.5%, 6/15/45 $ 200,653 -------------- Total Commercial Services & Supplies $ 277,626 ---------------------------------------------------------------------------------------------------- TRANSPORTATION -- 0.6% Airlines -- 0.3% 132,115 Air Canada 2013-1 Class A Pass Through Trust, 4.125%, 11/15/26 (144A) $ 139,051 246,092 Air Canada 2015-1 Class A Pass Through Trust, 3.6%, 3/15/27 (144A) 254,398 1,094 Continental Airlines 1998-1 Class A Pass Through Trust, 6.648%, 9/15/17 1,119 53,316 Delta Air Lines 2010-2 Class A Pass Through Trust, 4.95%, 5/23/19 56,582 250,000 Southwest Airlines Co., 2.65%, 11/5/20 257,527 200,000 United Airlines 2016-1 Class AA Pass Through Trust, 3.1%, 7/7/28 208,000 -------------- $ 916,677 ---------------------------------------------------------------------------------------------------- Railroads -- 0.2% 150,000 Burlington Northern Santa Fe LLC, 5.15%, 9/1/43 $ 191,451 250,000 TTX Co., 2.25%, 2/1/19 (144A) 254,024 -------------- $ 445,475 ---------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 30 Pioneer Classic Balanced Fund | Annual Report | 7/31/16 ---------------------------------------------------------------------------------------------------- Floating Principal Rate (b) Amount ($) (unaudited) Value ---------------------------------------------------------------------------------------------------- Highways & Railtracks -- 0.1% 300,000 ERAC USA Finance LLC, 4.5%, 2/15/45 (144A) $ 327,584 -------------- Total Transportation $ 1,689,736 ---------------------------------------------------------------------------------------------------- AUTOMOBILES & COMPONENTS -- 0.2% Auto Parts & Equipment -- 0.1% 250,000 Johnson Controls, Inc., 1.4%, 11/2/17 $ 250,336 ---------------------------------------------------------------------------------------------------- Automobile Manufacturers -- 0.1% 250,000 Ford Motor Credit Co., LLC, 2.875%, 10/1/18 $ 255,895 -------------- Total Automobiles & Components $ 506,231 ---------------------------------------------------------------------------------------------------- CONSUMER DURABLES & APPAREL -- 0.2% Homebuilding -- 0.2% 200,000 DR Horton, Inc., 4.0%, 2/15/20 $ 208,000 250,000 PulteGroup, Inc., 4.25%, 3/1/21 258,438 -------------- $ 466,438 -------------- Total Consumer Durables & Apparel $ 466,438 ---------------------------------------------------------------------------------------------------- CONSUMER SERVICES -- 0.1% Restaurants -- 0.0%+ 140,000 Starbucks Corp., 0.875%, 12/5/16 $ 140,148 ---------------------------------------------------------------------------------------------------- Education Services -- 0.1% 250,000 Colby College, 4.25%, 7/1/55 $ 259,955 -------------- Total Consumer Services $ 400,103 ---------------------------------------------------------------------------------------------------- MEDIA -- 0.3% Cable & Satellite -- 0.1% 225,000 Charter Communications Operating LLC, 6.384%, 10/23/35 (144A) $ 264,784 85,000 Sirius XM Radio, Inc., 5.375%, 7/15/26 (144A) 86,647 125,000 Sky Plc, 6.1%, 2/15/18 (144A) 133,132 25,000 Time Warner Cable, Inc., 6.55%, 5/1/37 29,998 -------------- $ 514,561 ---------------------------------------------------------------------------------------------------- Movies & Entertainment -- 0.1% 250,000 The Met, 3.4%, 7/1/45 $ 261,072 ---------------------------------------------------------------------------------------------------- Publishing -- 0.1% 250,000 Thomson Reuters Corp., 1.3%, 2/23/17 $ 250,182 -------------- Total Media $ 1,025,815 ---------------------------------------------------------------------------------------------------- RETAILING -- 0.3% Catalog Retail -- 0.1% 225,000 QVC, Inc., 4.45%, 2/15/25 $ 228,411 ---------------------------------------------------------------------------------------------------- Apparel Retail -- 0.1% 250,000 The TJX Companies, Inc., 2.75%, 6/15/21 $ 264,601 ---------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Classic Balanced Fund | Annual Report | 7/31/16 31 Schedule of Investments | 7/31/16 (continued) ---------------------------------------------------------------------------------------------------- Floating Principal Rate (b) Amount ($) (unaudited) Value ---------------------------------------------------------------------------------------------------- Home Improvement Retail -- 0.1% 250,000 The Home Depot, Inc., 2.625%, 6/1/22 $ 263,128 -------------- Total Retailing $ 756,140 ---------------------------------------------------------------------------------------------------- FOOD & STAPLES RETAILING -- 0.2% Drug Retail -- 0.2% 250,000 CVS Health Corp., 3.5%, 7/20/22 $ 271,271 150,381 CVS Pass-Through Trust, 5.298%, 1/11/27 (144A) 164,831 106,567 CVS Pass-Through Trust, 5.773%, 1/10/33 (144A) 120,722 -------------- $ 556,824 -------------- Total Food & Staples Retailing $ 556,824 ---------------------------------------------------------------------------------------------------- FOOD, BEVERAGE & TOBACCO -- 0.3% Brewers -- 0.0%+ 55,000 Anheuser-Busch InBev Worldwide, Inc., 7.75%, 1/15/19 $ 63,387 ---------------------------------------------------------------------------------------------------- Distillers & Vintners -- 0.1% 250,000 Pernod Ricard SA, 3.25%, 6/8/26 (144A) $ 258,396 ---------------------------------------------------------------------------------------------------- Agricultural Products -- 0.1% 410,000 Viterra, Inc., 5.95%, 8/1/20 (144A) $ 429,397 ---------------------------------------------------------------------------------------------------- Packaged Foods & Meats -- 0.1% 250,000 Kraft Heinz Foods Co., 3.5%, 6/6/22 $ 269,167 -------------- Total Food, Beverage & Tobacco $ 1,020,347 ---------------------------------------------------------------------------------------------------- HOUSEHOLD & PERSONAL PRODUCTS -- 0.1% Household Products -- 0.1% 200,000 Kimberly-Clark de Mexico SAB de CV, 3.8%, 4/8/24 (144A) $ 212,180 200,000 Reckitt Benckiser Treasury Services Plc, 2.125%, 9/21/18 (144A) 201,931 -------------- $ 414,111 -------------- Total Household & Personal Products $ 414,111 ---------------------------------------------------------------------------------------------------- HEALTH CARE EQUIPMENT & SERVICES -- 0.2% Health Care Equipment -- 0.1% 250,000 Becton Dickinson and Co., 1.8%, 12/15/17 $ 251,734 150,000 Boston Scientific Corp., 2.65%, 10/1/18 153,850 -------------- $ 405,584 ---------------------------------------------------------------------------------------------------- Health Care Facilities -- 0.1% 140,000 HCA, Inc., 5.375%, 2/1/25 $ 145,688 ---------------------------------------------------------------------------------------------------- Managed Health Care -- 0.0%+ 100,000 Anthem, Inc., 3.3%, 1/15/23 $ 104,882 -------------- Total Health Care Equipment & Services $ 656,154 ---------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 32 Pioneer Classic Balanced Fund | Annual Report | 7/31/16 ---------------------------------------------------------------------------------------------------- Floating Principal Rate (b) Amount ($) (unaudited) Value ---------------------------------------------------------------------------------------------------- PHARMACEUTICALS, BIOTECHNOLOGY & LIFE SCIENCES -- 0.5% Biotechnology -- 0.2% 250,000 Biogen, Inc., 4.05%, 9/15/25 $ 273,676 165,000 Gilead Sciences, Inc., 3.25%, 9/1/22 175,940 -------------- $ 449,616 ---------------------------------------------------------------------------------------------------- Pharmaceuticals -- 0.2% 300,000 Mylan NV, 3.95%, 6/15/26 (144A) $ 312,393 295,000 Teva Pharmaceutical Finance Netherlands III BV, 2.8%, 7/21/23 300,117 -------------- $ 612,510 ---------------------------------------------------------------------------------------------------- Life Sciences Tools & Services -- 0.1% 350,000 Thermo Fisher Scientific, Inc., 3.0%, 4/15/23 $ 361,115 -------------- Total Pharmaceuticals, Biotechnology & Life Sciences $ 1,423,241 ---------------------------------------------------------------------------------------------------- BANKS -- 1.9% Diversified Banks -- 1.3% 300,000 Bank of America Corp., 4.1%, 7/24/23 $ 326,836 305,000 Banque Ouest Africaine de Developpement, 5.5%, 5/6/21 (144A) 320,250 200,000 BPCE SA, 4.875%, 4/1/26 (144A) 208,034 250,000 Citigroup, Inc., 2.55%, 4/8/19 255,985 250,000 Citigroup, Inc., 3.875%, 3/26/25 259,004 200,000 Cooperatieve Rabobank UA, 3.875%, 2/8/22 218,327 300,000 Export-Import Bank of Korea, 2.875%, 9/17/18 308,450 200,000 HSBC Holdings Plc, 4.875%, 1/14/22 221,532 200,000 Intesa Sanpaolo S.p.A., 6.5%, 2/24/21 (144A) 227,869 250,000 Macquarie Bank, Ltd., 6.625%, 4/7/21 (144A) 288,242 250,000 Nordea Bank AB, 4.25%, 9/21/22 (144A) 268,397 150,000 Royal Bank of Canada, 1.45%, 9/9/16 150,128 400,000 8.00 Royal Bank of Scotland Group Plc, Floating Rate Note, 12/31/49 (Perpetual) 397,500 200,000 Wells Fargo & Co., 4.125%, 8/15/23 217,051 -------------- $ 3,667,605 ---------------------------------------------------------------------------------------------------- Regional Banks -- 0.6% 138,000 BB&T Corp., 1.6%, 8/15/17 $ 138,746 250,000 HSBC Bank USA NA New York NY, 6.0%, 8/9/17 260,385 300,000 KeyBank NA Cleveland Ohio, 2.25%, 3/16/20 304,717 250,000 KeyBank NA Cleveland Ohio, 2.35%, 3/8/19 255,191 370,000 PNC Bank NA, 5.25%, 1/15/17 376,774 300,000 SunTrust Bank, 1.35%, 2/15/17 300,264 210,000 6.75 The PNC Financial Services Group, Inc., Floating Rate Note (Perpetual) 235,988 -------------- $ 1,872,065 -------------- Total Banks $ 5,539,670 ---------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Classic Balanced Fund | Annual Report | 7/31/16 33 Schedule of Investments | 7/31/16 (continued) ---------------------------------------------------------------------------------------------------- Floating Principal Rate (b) Amount ($) (unaudited) Value ---------------------------------------------------------------------------------------------------- DIVERSIFIED FINANCIALS -- 1.9% Other Diversified Financial Services -- 0.3% 400,000 Carlyle Holdings II Finance LLC, 5.625%, 3/30/43 (144A) $ 447,615 121,000 General Electric Co., 6.75%, 3/15/32 171,701 325,000 6.75 JPMorgan Chase & Co., Floating Rate Note, 8/29/49 365,999 -------------- $ 985,315 ---------------------------------------------------------------------------------------------------- Specialized Finance -- 0.4% 175,000 Aviation Capital Group Corp., 6.75%, 4/6/21 (144A) $ 204,488 200,000 BM&FBovespa SA - Bolsa de Valores Mercadorias e Futuros, 5.5%, 7/16/20 (144A) 212,100 500,000 Private Export Funding Corp., 2.3%, 9/15/20 518,467 250,000 USAA Capital Corp., 2.45%, 8/1/20 (144A) 259,999 -------------- $ 1,195,054 ---------------------------------------------------------------------------------------------------- Consumer Finance -- 0.5% 250,000 Ally Financial, Inc., 4.625%, 3/30/25 $ 256,250 250,000 American Express Co., 1.55%, 5/22/18 251,232 360,000 Capital One Bank USA NA, 8.8%, 7/15/19 424,890 300,000 Capital One Financial Corp., 3.75%, 4/24/24 317,565 250,000 Capital One NA, 1.65%, 2/5/18 250,602 -------------- $ 1,500,539 ---------------------------------------------------------------------------------------------------- Asset Management & Custody Banks -- 0.2% 300,000 KKR Group Finance Co., II LLC, 5.5%, 2/1/43 (144A) $ 318,188 207,000 Neuberger Berman Group LLC, 4.875%, 4/15/45 (144A) 180,944 -------------- $ 499,132 ---------------------------------------------------------------------------------------------------- Investment Banking & Brokerage -- 0.2% 75,000 KKR Group Finance Co., III LLC, 5.125%, 6/1/44 (144A) $ 77,179 250,000 Morgan Stanley, 2.65%, 1/27/20 255,927 250,000 Morgan Stanley, 4.1%, 5/22/23 263,977 -------------- $ 597,083 ---------------------------------------------------------------------------------------------------- Diversified Capital Markets -- 0.3% 413,000 GE Capital International Funding Co., Unlimited Co., 4.418%, 11/15/35 $ 476,033 400,000 2.30 ICBCIL Finance Co., Ltd., Floating Rate Note, 11/13/18 (144A) 402,137 -------------- $ 878,170 -------------- Total Diversified Financials $ 5,655,293 ---------------------------------------------------------------------------------------------------- INSURANCE -- 2.4% Life & Health Insurance -- 0.4% 220,000 Principal Financial Group, Inc., 3.3%, 9/15/22 $ 228,178 75,000 Principal Life Global Funding II, 1.5%, 4/18/19 (144A) 75,480 335,000 Protective Life Corp., 7.375%, 10/15/19 391,452 The accompanying notes are an integral part of these financial statements. 34 Pioneer Classic Balanced Fund | Annual Report | 7/31/16 ---------------------------------------------------------------------------------------------------- Floating Principal Rate (b) Amount ($) (unaudited) Value ---------------------------------------------------------------------------------------------------- Life & Health Insurance -- (continued) 200,000 5.62 Prudential Financial, Inc., Floating Rate Note, 6/15/43 $ 214,150 150,000 5.88 Prudential Financial, Inc., Floating Rate Note, 9/15/42 166,238 -------------- $ 1,075,498 ---------------------------------------------------------------------------------------------------- Multi-line Insurance -- 0.3% 200,000 AIG, 3.875%, 1/15/35 $ 195,126 250,000 AXA SA, 8.6%, 12/15/30 351,455 200,000 New York Life Global Funding, 1.125%, 3/1/17 (144A) 200,376 200,000 New York Life Global Funding, 1.45%, 12/15/17 (144A) 201,365 -------------- $ 948,322 ---------------------------------------------------------------------------------------------------- Property & Casualty Insurance -- 0.1% 300,000 The Hanover Insurance Group, Inc., 4.5%, 4/15/26 $ 310,014 ---------------------------------------------------------------------------------------------------- Reinsurance -- 1.6% 250,000 5.78 Alamo Re, Ltd., Floating Rate Note, 6/7/18 (Cat Bond) (144A) $ 257,200 250,000 4.00 Kilimanjaro Re, Ltd., Floating Rate Note, 11/25/19 (Cat Bond) (144A) 253,450 250,000 6.87 Kilimanjaro Re, Ltd., Floating Rate Note, 12/6/19 (Cat Bond) (144A) 253,975 250,000 9.46 Kilimanjaro Re, Ltd., Floating Rate Note, 12/6/19 (Cat Bond) (144A) 256,375 250,000 5.00 Kilimanjaro Re, Ltd., Floating Rate Note, 4/30/18 (Cat Bond) (144A) 249,750 250,000 Kingsbarns Segregated Account (Kane SAC Ltd.), Variable Rate Notes, 5/15/17 (d)(e) 234,850 250,000 Lahinch Re, Variable Rate Notes, 5/10/21 (d)(e) 243,525 100,000 Lorenz Re, Ltd., Variable Rate Notes, 3/31/18 (d)(e) 7,000 150,000 Lorenz Re, Ltd., Variable Rate Notes, 3/31/19 (d)(e) 152,775 250,000 Madison Re, Variable Rate Notes, 3/31/19 (d)(e) 254,425 250,000 Pangaea Re, Variable Rate Notes, 12/20/16 (d)(e) 232,075 250,000 4.61 PennUnion Re, Ltd., Floating Rate Note, 12/7/18 (Cat Bond) (144A) 251,600 250,000 Port Rush Re, Variable Rate Notes, 6/15/17 (d)(e) 228,625 250,000 5.83 Queen Street X Re, Ltd., Floating Rate Note, 6/8/18 (Cat Bond) (144A) 250,450 250,000 5.30 Residential Reinsurance 2013, Ltd., Floating Rate Note, 12/6/17 (Cat Bond) (144A) 248,800 300,000 Resilience Re, Ltd., Variable Rate Notes, 4/7/17 (d)(e) 277,800 250,000 3.26 Sanders Re, Ltd., Floating Rate Note, 5/25/18 (Cat Bond) (144A) 248,375 250,000 4.21 Sanders Re, Ltd., Floating Rate Note, 5/5/17 (Cat Bond) (144A) 248,225 250,000 4.03 Sanders Re, Ltd., Floating Rate Note, 6/7/17 (Cat Bond) (144A) 248,750 The accompanying notes are an integral part of these financial statements. Pioneer Classic Balanced Fund | Annual Report | 7/31/16 35 Schedule of Investments | 7/31/16 (continued) ---------------------------------------------------------------------------------------------------- Floating Principal Rate (b) Amount ($) (unaudited) Value ---------------------------------------------------------------------------------------------------- Reinsurance -- (continued) 250,000 Sector Re V, Ltd., Variable Rate Notes, 3/1/21 (d)(e) $ 251,950 1,042 Sector Re V, Ltd., Variable Rate Notes, 3/1/20 (144A) (d)(e) 33,582 -------------- $ 4,683,557 -------------- Total Insurance $ 7,017,391 ---------------------------------------------------------------------------------------------------- REAL ESTATE -- 0.6% Diversified REIT -- 0.3% 200,000 DCT Industrial Operating Partnership LP, 4.5%, 10/15/23 $ 212,619 300,000 Duke Realty LP, 3.75%, 12/1/24 319,797 250,000 Essex Portfolio LP, 3.5%, 4/1/25 261,498 125,000 Ventas Realty LP, 3.125%, 6/15/23 127,687 -------------- $ 921,601 ---------------------------------------------------------------------------------------------------- Office REIT -- 0.2% 100,000 Alexandria Real Estate Equities, Inc., 3.95%, 1/15/27 $ 104,524 110,000 Alexandria Real Estate Equities, Inc., 4.6%, 4/1/22 119,320 250,000 Highwoods Realty LP, 3.625%, 1/15/23 256,215 128,000 Piedmont Operating Partnership LP, 3.4%, 6/1/23 126,360 -------------- $ 606,419 ---------------------------------------------------------------------------------------------------- Health Care REIT -- 0.1% 280,000 Healthcare Trust of America Holdings LP, 3.5%, 8/1/26 $ 282,654 -------------- Total Real Estate $ 1,810,674 ---------------------------------------------------------------------------------------------------- SOFTWARE & SERVICES -- 0.1% Systems Software -- 0.1% 250,000 Oracle Corp., 2.5%, 5/15/22 $ 257,111 -------------- Total Software & Services $ 257,111 ---------------------------------------------------------------------------------------------------- TECHNOLOGY HARDWARE & EQUIPMENT -- 0.3% Communications Equipment -- 0.0%+ 145,000 Brocade Communications Systems, Inc., 4.625%, 1/15/23 $ 140,650 ---------------------------------------------------------------------------------------------------- Computer Hardware Storage & Peripherals -- 0.2% 250,000 Apple, Inc., 3.25%, 2/23/26 $ 267,431 160,000 NCR Corp., 6.375%, 12/15/23 165,600 -------------- $ 433,031 ---------------------------------------------------------------------------------------------------- Electronic Manufacturing Services -- 0.1% 250,000 Flextronics International, Ltd., 4.75%, 6/15/25 $ 263,380 -------------- Total Technology Hardware & Equipment $ 837,061 ---------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 36 Pioneer Classic Balanced Fund | Annual Report | 7/31/16 ---------------------------------------------------------------------------------------------------- Floating Principal Rate (b) Amount ($) (unaudited) Value ---------------------------------------------------------------------------------------------------- SEMICONDUCTORS & SEMICONDUCTOR EQUIPMENT -- 0.4% Semiconductors -- 0.4% 250,000 Altera Corp., 2.5%, 11/15/18 $ 258,617 250,000 Intel Corp., 4.9%, 7/29/45 300,297 125,000 Micron Semiconductor Asia Pte, Ltd., 1.258%, 1/15/19 124,572 200,000 Texas Instruments, Inc., 0.875%, 3/12/17 200,105 150,000 Xilinx, Inc., 3.0%, 3/15/21 156,043 -------------- $ 1,039,634 -------------- Total Semiconductors & Semiconductor Equipment $ 1,039,634 ---------------------------------------------------------------------------------------------------- TELECOMMUNICATION SERVICES -- 0.8% Integrated Telecommunication Services -- 0.5% 250,000 AT&T, Inc., 4.75%, 5/15/46 $ 264,738 60,000 CenturyLink, Inc., 7.5%, 4/1/24 64,050 170,000 Frontier Communications Corp., 10.5%, 9/15/22 183,600 350,000 Telefonica Emisiones SAU, 5.462%, 2/16/21 402,131 300,000 Telefonica Emisiones SAU, 6.221%, 7/3/17 313,104 196,000 Verizon Communications, Inc., 6.55%, 9/15/43 266,670 -------------- $ 1,494,293 ---------------------------------------------------------------------------------------------------- Wireless Telecommunication Services -- 0.3% 250,000 Crown Castle Towers LLC, 3.222%, 5/15/22 (144A) $ 259,642 240,000 Crown Castle Towers LLC, 4.883%, 8/15/20 (144A) 261,955 140,000 Crown Castle Towers LLC, 6.113%, 1/15/20 (144A) 156,035 140,000 T-Mobile USA, Inc., 6.0%, 4/15/24 149,407 100,000 WCP Issuer llc, 6.657%, 8/15/20 (144A) 103,316 -------------- $ 930,355 -------------- Total Telecommunication Services $ 2,424,648 ---------------------------------------------------------------------------------------------------- UTILITIES -- 1.6% Electric Utilities -- 1.5% 225,000 Commonwealth Edison Co., 6.15%, 9/15/17 $ 237,744 230,000 Edison International, 2.95%, 3/15/23 235,109 100,000 Electricite de France SA, 6.0%, 1/22/14 (144A) 107,454 250,000 5.25 Electricite de France SA, Floating Rate Note (Perpetual) (144A) 243,750 270,000 Enel Finance International NV, 5.125%, 10/7/19 (144A) 297,694 200,000 8.13 Enel S.p.A., Floating Rate Note, 9/24/73 (144A) 231,750 250,000 Exelon Corp., 2.85%, 6/15/20 259,794 66,497 FPL Energy American Wind LLC, 6.639%, 6/20/23 (144A) 65,371 560,000 Iberdrola International BV, 6.75%, 7/15/36 761,582 200,000 Israel Electric Corp., Ltd., 6.7%, 2/10/17 (144A) 204,400 200,000 Israel Electric Corp., Ltd., 7.25%, 1/15/19 (144A) 222,650 125,000 Nevada Power Co., 6.5%, 8/1/18 138,191 250,000 NextEra Energy Capital Holdings, Inc., 2.056%, 9/1/17 251,566 The accompanying notes are an integral part of these financial statements. Pioneer Classic Balanced Fund | Annual Report | 7/31/16 37 Schedule of Investments | 7/31/16 (continued) ---------------------------------------------------------------------------------------------------- Floating Principal Rate (b) Amount ($) (unaudited) Value ---------------------------------------------------------------------------------------------------- Electric Utilities -- (continued) 49,841 OrCal Geothermal, Inc., 6.21%, 12/30/20 (144A) $ 51,523 250,000 PPL Capital Funding, Inc., 3.1%, 5/15/26 255,102 275,000 Public Service Co. of New Mexico, 7.95%, 5/15/18 304,529 250,000 Southwestern Electric Power Co., 3.9%, 4/1/45 255,914 105,000 Talen Energy Supply LLC, 6.5%, 6/1/25 92,400 -------------- $ 4,216,523 ---------------------------------------------------------------------------------------------------- Gas Utilities -- 0.1% 250,000 Southern California Gas Co., 5.125%, 11/15/40 $ 317,815 ---------------------------------------------------------------------------------------------------- Independent Power Producers & Energy Traders -- 0.0%+ 72,285 Alta Wind Holdings LLC, 7.0%, 6/30/35 (144A) $ 74,596 -------------- Total Utilities $ 4,608,934 ---------------------------------------------------------------------------------------------------- TOTAL CORPORATE BONDS (Cost $49,737,331) $ 52,178,756 ---------------------------------------------------------------------------------------------------- U.S. GOVERNMENT AND AGENCY OBLIGATIONS -- 12.4% 106,570 Fannie Mae, 3.0%, 10/1/30 $ 112,396 24,917 Fannie Mae, 3.0%, 5/1/46 26,087 99,649 Fannie Mae, 3.0%, 5/1/46 104,540 255,318 Fannie Mae, 3.0%, 6/1/45 267,822 1,892,227 Fannie Mae, 3.5%, 12/1/45 1,998,287 1,501,854 Fannie Mae, 3.5%, 7/1/43 1,589,236 342,320 Fannie Mae, 3.5%, 7/1/45 361,509 1,106,474 Fannie Mae, 3.5%, 8/1/45 1,168,492 925,493 Fannie Mae, 3.5%, 9/1/44 977,367 520,791 Fannie Mae, 3.5%, 9/1/45 549,981 114,170 Fannie Mae, 4.0%, 1/1/41 122,845 465,967 Fannie Mae, 4.0%, 2/1/41 501,437 917,388 Fannie Mae, 4.0%, 2/1/41 987,184 564,134 Fannie Mae, 4.0%, 3/1/41 607,245 731,680 Fannie Mae, 4.0%, 6/1/42 788,869 603,242 Fannie Mae, 4.0%, 7/1/43 646,547 360,806 Fannie Mae, 4.0%, 7/1/44 386,537 224,764 Fannie Mae, 4.0%, 7/1/46 241,878 289,204 Fannie Mae, 4.0%, 8/1/43 310,288 321,830 Fannie Mae, 4.0%, 8/1/43 345,426 225,000 Fannie Mae, 4.0%, 8/1/46 242,131 475,959 Fannie Mae, 4.0%, 9/1/40 512,054 348,777 Fannie Mae, 4.0%, 9/1/40 375,408 267,532 Fannie Mae, 4.0%, 9/1/42 287,839 456,202 Fannie Mae, 4.0%, 9/1/44 488,852 23,826 Fannie Mae, 4.5%, 11/1/20 24,684 8,232 Fannie Mae, 4.5%, 12/1/43 9,102 The accompanying notes are an integral part of these financial statements. 38 Pioneer Classic Balanced Fund | Annual Report | 7/31/16 ---------------------------------------------------------------------------------------------------- Floating Principal Rate (b) Amount ($) (unaudited) Value ---------------------------------------------------------------------------------------------------- U.S. GOVERNMENT AND AGENCY OBLIGATIONS -- (continued) 613,910 Fannie Mae, 4.5%, 12/1/43 $ 669,422 452,398 Fannie Mae, 4.5%, 4/1/41 495,451 618,624 Fannie Mae, 4.5%, 6/1/40 675,809 13,326 Fannie Mae, 5.0%, 5/1/18 13,679 23,294 Fannie Mae, 5.0%, 6/1/37 25,752 113,764 Fannie Mae, 5.5%, 10/1/35 128,675 13,819 Fannie Mae, 5.5%, 12/1/34 15,657 51,289 Fannie Mae, 5.5%, 12/1/35 57,893 51,044 Fannie Mae, 5.5%, 12/1/35 57,684 56,471 Fannie Mae, 5.5%, 3/1/23 61,353 6,814 Fannie Mae, 5.5%, 3/1/34 7,637 43,547 Fannie Mae, 5.5%, 5/1/37 48,879 173,350 Fannie Mae, 5.5%, 5/1/38 194,265 26,219 Fannie Mae, 6.0%, 10/1/37 29,906 29,018 Fannie Mae, 6.0%, 12/1/33 33,509 15,712 Fannie Mae, 6.0%, 12/1/37 17,970 3,325 Fannie Mae, 6.0%, 8/1/32 3,841 1,233 Fannie Mae, 6.0%, 9/1/29 1,422 12,050 Fannie Mae, 6.5%, 10/1/32 13,896 20,537 Fannie Mae, 6.5%, 4/1/29 23,660 32,611 Fannie Mae, 6.5%, 5/1/32 39,337 5,305 Fannie Mae, 6.5%, 7/1/29 6,118 24,603 Fannie Mae, 6.5%, 9/1/32 28,590 11,114 Fannie Mae, 7.0%, 1/1/36 12,290 174,408 Federal Home Loan Mortgage Corp., 3.0%, 6/1/46 182,432 601,645 Federal Home Loan Mortgage Corp., 3.5%, 1/1/45 635,197 223,788 Federal Home Loan Mortgage Corp., 3.5%, 11/1/28 240,258 191,816 Federal Home Loan Mortgage Corp., 3.5%, 3/1/26 203,446 403,413 Federal Home Loan Mortgage Corp., 3.5%, 3/1/42 427,293 1,817,285 Federal Home Loan Mortgage Corp., 3.5%, 3/1/45 1,918,628 630,700 Federal Home Loan Mortgage Corp., 3.5%, 6/1/45 665,872 662,702 Federal Home Loan Mortgage Corp., 3.5%, 7/1/44 699,959 87,793 Federal Home Loan Mortgage Corp., 3.5%, 8/1/44 92,710 1,684,614 Federal Home Loan Mortgage Corp., 3.5%, 9/1/42 1,785,074 449,906 Federal Home Loan Mortgage Corp., 4.0%, 1/1/41 483,685 1,025,250 Federal Home Loan Mortgage Corp., 4.0%, 10/1/44 1,097,485 666,653 Federal Home Loan Mortgage Corp., 4.0%, 11/1/40 716,599 786,946 Federal Home Loan Mortgage Corp., 4.0%, 11/1/40 846,049 355,199 Federal Home Loan Mortgage Corp., 4.0%, 11/1/44 380,116 363,950 Federal Home Loan Mortgage Corp., 4.0%, 2/1/40 391,315 1,148,530 Federal Home Loan Mortgage Corp., 4.0%, 6/1/44 1,228,808 The accompanying notes are an integral part of these financial statements. Pioneer Classic Balanced Fund | Annual Report | 7/31/16 39 Schedule of Investments | 7/31/16 (continued) ---------------------------------------------------------------------------------------------------- Floating Principal Rate (b) Amount ($) (unaudited) Value ---------------------------------------------------------------------------------------------------- U.S. GOVERNMENT AND AGENCY OBLIGATIONS -- (continued) 322,324 Federal Home Loan Mortgage Corp., 4.0%, 7/1/44 $ 344,992 339,768 Federal Home Loan Mortgage Corp., 4.0%, 9/1/44 363,642 288,605 Federal Home Loan Mortgage Corp., 4.5%, 5/1/40 315,838 291,807 Federal Home Loan Mortgage Corp., 4.5%, 5/1/41 319,907 150,249 Federal Home Loan Mortgage Corp., 4.5%, 7/1/40 164,036 79,673 Federal Home Loan Mortgage Corp., 4.5%, 8/1/34 87,138 54,146 Federal Home Loan Mortgage Corp., 5.0%, 11/1/34 60,145 57,252 Federal Home Loan Mortgage Corp., 5.0%, 8/1/37 63,294 1,052 Federal Home Loan Mortgage Corp., 5.5%, 10/1/16 1,053 29,998 Federal Home Loan Mortgage Corp., 5.5%, 11/1/34 33,921 23,622 Federal Home Loan Mortgage Corp., 6.0%, 1/1/38 27,045 38,281 Federal Home Loan Mortgage Corp., 6.0%, 10/1/38 43,741 33,748 Federal Home Loan Mortgage Corp., 6.0%, 4/1/33 38,445 11,838 Federal Home Loan Mortgage Corp., 6.5%, 10/1/33 14,087 74,411 Federal Home Loan Mortgage Corp., 7.0%, 10/1/46 84,989 697,014 Federal National Mortgage Association, 3.5%, 11/1/45 736,082 450,556 Federal National Mortgage Association, 4.0%, 9/1/45 483,144 779,237 Government National Mortgage Association I, 4.0%, 9/15/41 839,703 17,939 Government National Mortgage Association I, 5.0%, 2/15/18 18,242 23,728 Government National Mortgage Association I, 5.0%, 2/15/18 24,195 18,234 Government National Mortgage Association I, 5.5%, 8/15/33 20,973 22,377 Government National Mortgage Association I, 5.5%, 9/15/33 25,319 19,212 Government National Mortgage Association I, 6.0%, 10/15/33 22,436 19,078 Government National Mortgage Association I, 6.0%, 9/15/34 21,867 123,902 Government National Mortgage Association I, 6.0%, 9/15/38 142,448 18,141 Government National Mortgage Association I, 6.5%, 10/15/28 20,855 32,500 Government National Mortgage Association I, 6.5%, 12/15/32 39,513 38,546 Government National Mortgage Association I, 6.5%, 5/15/31 44,312 24,943 Government National Mortgage Association I, 6.5%, 5/15/33 28,675 32,088 Government National Mortgage Association I, 6.5%, 6/15/32 39,077 The accompanying notes are an integral part of these financial statements. 40 Pioneer Classic Balanced Fund | Annual Report | 7/31/16 ---------------------------------------------------------------------------------------------------- Floating Principal Rate (b) Amount ($) (unaudited) Value ---------------------------------------------------------------------------------------------------- U.S. GOVERNMENT AND AGENCY OBLIGATIONS -- (continued) 457 Government National Mortgage Association I, 7.0%, 8/15/28 $ 550 3,215 Government National Mortgage Association I, 8.0%, 2/15/30 3,255 42,187 Government National Mortgage Association II, 5.5%, 2/20/34 47,435 65,668 Government National Mortgage Association II, 6.5%, 11/20/28 77,967 2,759 Government National Mortgage Association II, 7.5%, 9/20/29 3,450 950,000 U.S. Treasury Bonds, 3.125%, 2/15/43 1,143,488 510,095 U.S. Treasury Inflation Indexed Bonds, 0.75%, 2/15/45 532,153 1,125,418 U.S. Treasury Inflation Indexed Bonds, 1.0%, 2/15/46 1,261,772 -------------- $ 36,230,848 ---------------------------------------------------------------------------------------------------- TOTAL U.S. GOVERNMENT AND AGENCY OBLIGATIONS (Cost $35,330,837) $ 36,230,848 ---------------------------------------------------------------------------------------------------- FOREIGN GOVERNMENT BOND -- 0.1% 200,000 Bahamas Government International Bond, 5.75%, 1/16/24 (144A) $ 209,000 ---------------------------------------------------------------------------------------------------- TOTAL FOREIGN GOVERNMENT BOND (Cost $200,000) $ 209,000 ---------------------------------------------------------------------------------------------------- MUNICIPAL BONDS -- 1.2% (f) Municipal Education -- 0.0%+ 100,000 Massachusetts Development Finance Agency, 4.844%, 9/1/43 $ 122,161 ---------------------------------------------------------------------------------------------------- Municipal General -- 0.2% 100,000 Central Texas Regional Mobility Authority, 1/1/25 (c) $ 76,856 200,000 City of Raleigh North Carolina, 4.0%, 10/1/32 229,042 200,000 JobsOhio Beverage System, 3.985%, 1/1/29 230,434 -------------- $ 536,332 ---------------------------------------------------------------------------------------------------- Higher Municipal Education -- 0.5% 100,000 Massachusetts Development Finance Agency, Northeastern University-Series A, 5.0%, 3/1/39 $ 120,555 250,000 Massachusetts Institute of Technology, 5.6%, 7/1/11 366,669 300,000 The Board of Trustees of The Leland Stanford Junior University, 4.75%, 5/1/19 328,507 250,000 The George Washington University, 1.827%, 9/15/17 251,910 The accompanying notes are an integral part of these financial statements. Pioneer Classic Balanced Fund | Annual Report | 7/31/16 41 Schedule of Investments | 7/31/16 (continued) ---------------------------------------------------------------------------------------------------- Floating Principal Rate (b) Amount ($) (unaudited) Value ---------------------------------------------------------------------------------------------------- Higher Municipal Education -- (continued) 137,000 The George Washington University, 3.485%, 9/15/22 $ 147,052 200,000 University of California, 4.062%, 5/15/33 214,518 100,000 Virginia College Building Authority, 4.0%, 9/1/26 115,671 -------------- $ 1,544,882 ---------------------------------------------------------------------------------------------------- Municipal Medical -- 0.1% 100,000 Health & Educational Facilities Authority of the State of Missouri, 3.685%, 2/15/47 $ 110,746 150,000 Massachusetts Development Finance Agency, 5.0%, 7/1/39 175,672 -------------- $ 286,418 ---------------------------------------------------------------------------------------------------- Municipal Power -- 0.1% 250,000 Energy Northwest, 5.0%, 7/1/35 $ 299,565 ---------------------------------------------------------------------------------------------------- Municipal Transportation -- 0.1% 180,000 Maine Turnpike Authority, 5.0%, 7/1/42 $ 211,887 ---------------------------------------------------------------------------------------------------- Municipal Water -- 0.1% 150,000 County of King Washington Sewer Revenue, 4.25%, 1/1/36 $ 166,108 ---------------------------------------------------------------------------------------------------- Municipal Obligation -- 0.1% 250,000 City of Irving Texas, 4.0%, 9/15/27 (g) $ 291,060 ---------------------------------------------------------------------------------------------------- TOTAL MUNICIPAL BONDS (Cost $3,045,035) $ 3,458,413 ---------------------------------------------------------------------------------------------------- SENIOR FLOATING RATE LOAN INTERESTS -- 1.0%** MATERIALS -- 0.1% Commodity Chemicals -- 0.1% 198,990 4.00 Axiall Holdco, Inc., Initial Loan, 2/27/22 $ 199,446 -------------- Total Materials $ 199,446 ---------------------------------------------------------------------------------------------------- CAPITAL GOODS -- 0.2% Aerospace & Defense -- 0.1% 93,818 3.75 B/E Aerospace, Inc., Term Loan, 11/19/21 $ 94,815 153,405 3.25 Wesco Aircraft Hardare Corp., Tranche B Term Loan (First Lien), 2/24/21 152,830 -------------- $ 247,645 ---------------------------------------------------------------------------------------------------- Industrial Machinery -- 0.1% 246,250 4.00 Mueller Water Products, Inc., Initial Loan, 11/25/21 $ 247,532 -------------- Total Capital Goods $ 495,177 ---------------------------------------------------------------------------------------------------- AUTOMOBILES & COMPONENTS -- 0.1% Automobile Manufacturers -- 0.1% 279,736 3.50 Chrysler Group LLC, Term Loan B, 5/24/17 $ 280,560 -------------- Total Automobiles & Components $ 280,560 ---------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 42 Pioneer Classic Balanced Fund | Annual Report | 7/31/16 ---------------------------------------------------------------------------------------------------- Floating Principal Rate (b) Amount ($) (unaudited) Value ---------------------------------------------------------------------------------------------------- CONSUMER SERVICES -- 0.1% Leisure Facilities -- 0.1% 172,389 3.25 Six Flags Theme Parks, Inc., Tranche B Term Loan, 6/30/22 $ 173,035 -------------- Total Consumer Services $ 173,035 ---------------------------------------------------------------------------------------------------- MEDIA -- 0.1% Broadcasting -- 0.0%+ 72,931 3.00 Sinclair Television Group, Inc., New Tranche B Term Loan, 4/19/20 $ 73,022 ---------------------------------------------------------------------------------------------------- Movies & Entertainment -- 0.1% 91,820 3.25 Kasima LLC, Term Loan, 5/17/21 $ 91,964 -------------- Total Media $ 164,986 ---------------------------------------------------------------------------------------------------- FOOD, BEVERAGE & TOBACCO -- 0.1% Agricultural Products -- 0.1% 248,728 3.25 Darling International, Inc., Term B USD Loan, 12/19/20 $ 249,894 -------------- Total Food, Beverage & Tobacco $ 249,894 ---------------------------------------------------------------------------------------------------- DIVERSIFIED FINANCIALS -- 0.1% Other Diversified Financial Services -- 0.1% 150,000 3.50 Delos Finance S.a.r.l., Tranche B Term Loan, 2/27/21 $ 150,825 145,833 3.50 Fly Funding II S.a.r.l., Loan, 8/9/19 145,924 -------------- $ 296,749 -------------- Total Diversified Financials $ 296,749 ---------------------------------------------------------------------------------------------------- SOFTWARE & SERVICES -- 0.0%+ IT Consulting & Other Services -- 0.0%+ 53,320 3.75 NXP BV, Tranche B Loan, 10/30/20 $ 53,745 -------------- Total Software & Services $ 53,745 ---------------------------------------------------------------------------------------------------- TECHNOLOGY HARDWARE & EQUIPMENT -- 0.0%+ Communications Equipment -- 0.0%+ 130,608 3.54 CommScope, Inc., Tranche 4 Term Loan, 1/14/18 $ 130,771 -------------- Total Technology Hardware & Equipment $ 130,771 ---------------------------------------------------------------------------------------------------- SEMICONDUCTORS & SEMICONDUCTOR EQUIPMENT -- 0.0%+ Semiconductors -- 0.0%+ 116,867 4.25 Avago Technologies Finance, Term Loan (First Lien), 11/13/22 $ 117,281 -------------- Total Semiconductors & Semiconductor Equipment $ 117,281 ---------------------------------------------------------------------------------------------------- TELECOMMUNICATION SERVICES -- 0.0%+ Integrated Telecommunication Services -- 0.0%+ 148,125 4.00 GCI Holdings, Inc., New Term B Loan, 2/2/22 $ 149,190 -------------- Total Telecommunication Services $ 149,190 ---------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Classic Balanced Fund | Annual Report | 7/31/16 43 Schedule of Investments | 7/31/16 (continued) ---------------------------------------------------------------------------------------------------- Floating Principal Rate (b) Amount ($) (unaudited) Value ---------------------------------------------------------------------------------------------------- UTILITIES -- 0.2% Electric Utilities -- 0.2% 287,854 5.63 APLP Holdings LP, Term Loan, 4/12/23 $ 288,394 219,363 3.25 Calpine Construction Finance Co. LP, Term B-2 Loan, 1/3/22 216,895 -------------- $ 505,289 -------------- Total Utilities $ 505,289 ---------------------------------------------------------------------------------------------------- TOTAL SENIOR FLOATING RATE LOAN INTERESTS (Cost $2,796,576) $ 2,816,123 ---------------------------------------------------------------------------------------------------- TOTAL INVESTMENT IN SECURITIES -- 99.9% (Cost $259,103,624) (a) $ 291,140,340 ---------------------------------------------------------------------------------------------------- OTHER ASSETS & LIABILITIES -- 0.1% $ 345,571 ---------------------------------------------------------------------------------------------------- NET ASSETS -- 100.0% $ 291,485,911 ==================================================================================================== * Non-income producing security. + Amount rounds to less than 0.1%. (A.D.R.) American Depositary Receipts. (Perpetual) Security with no stated maturity date. (Step) Bond issued with an initial coupon rate which converts to a higher rate at a later date. REIT Real Estate Investment Trust. REMICS Real Estate Mortgage Investment Conduits. (Cat Bond) Catastrophe or event-linked bond. At July 31, 2016, the value of these securities amounted to $2,766,950 or 1.0% of net assets. See Notes to Financial Statements -- Note 1H. ** Senior floating rate loan interests in which the Fund invests generally pay interest at rates that are periodically redetermined by reference to a base lending rate plus a premium. These base lending rates are generally (i) the lending rate offered by one or more major European banks, such as LIBOR (London InterBank Offered Rate), (ii) the prime rate offered by one or more major U.S. banks, (iii) the certificate of deposit or (iv) other base lending rates used by commercial lenders. The rate shown is the coupon rate at period end. (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, 2016, the value of these securities amounted to $24,141,050 or 8.3% of total net assets. (a) At July 31, 2016, the net unrealized appreciation on investments based on cost for federal income tax purposes of $259,134,182 was as follows: Aggregate gross unrealized appreciation for all investments in which there is an excess of value over tax cost $ 35,724,927 Aggregate gross unrealized depreciation for all investments in which there is an excess of tax cost over value (3,718,769) ------------ Net unrealized appreciation $ 32,006,158 ============ (b) Debt obligation with a variable interest rate. Rate shown is rate at period end. The accompanying notes are an integral part of these financial statements. 44 Pioneer Classic Balanced Fund | Annual Report | 7/31/16 (c) Security issued with a zero coupon. Income is earned through accretion of discount. (d) Structured reinsurance investment. At July 31, 2016, the value of these securities amounted to $1,916,607 or 1.0% of net assets. See Notes to Financial Statements -- Note 1H. (e) Rate to be determined. (f) Consists of Revenue Bonds unless otherwise indicated. (g) Represents a General Obligation Bond. Purchases and sales of securities (excluding temporary cash investments) for the year ended July 31, 2016 were as follows: ----------------------------------------------------------------------------------------------------- Purchases Sales ----------------------------------------------------------------------------------------------------- Long-Term U.S. Government $ 18,169,558 $ 11,987,539 Other Long-Term Securities $113,571,890 $133,802,890 Various inputs are used in determining the value of the Fund's investments. These inputs are summarized in the three broad levels listed below. Level 1 -- quoted prices in active markets for identical securities. Level 2 -- other significant observable inputs (including quoted prices for similar securities, interest rates, prepayment speeds, credit risk, etc.) See Notes to Financial Statements -- Note 1A. Level 3 -- significant unobservable inputs (including the Fund's own assumptions in determining fair value of investments) See Notes to Financial Statements -- Note 1A. The following is a summary of the inputs used as of July 31, 2016, in valuing the Fund's investments: --------------------------------------------------------------------------------------------------------------- Level 1 Level 2 Level 3 Total --------------------------------------------------------------------------------------------------------------- Preferred Stocks $ 20,402 $ -- $ -- $ 20,402 Convertible Preferred Stock 931,882 -- -- 931,882 Common Stocks 180,399,315 -- -- 180,399,315 Asset Backed Securities -- 4,876,193 -- 4,876,193 Collateralized Mortgage Obligations -- 10,019,408 -- 10,019,408 Corporate Bonds Insurance Reinsurance -- 2,766,950 1,916,607 4,683,557 All Other Corporate Bonds -- 47,495,199 -- 47,495,199 U.S. Government and Agency Obligations -- 36,230,848 -- 36,230,848 Foreign Government Bond -- 209,000 -- 209,000 Municipal Bonds -- 3,458,413 -- 3,458,413 Senior Floating Rate Loan Interests -- 2,816,123 -- 2,816,123 --------------------------------------------------------------------------------------------------------------- Total $181,351,599 $107,872,134 $1,916,607 $291,140,340 =============================================================================================================== Other Financial Instruments Net unrealized appreciation on futures contracts $ 21,115 $ -- $ -- $ 21,115 --------------------------------------------------------------------------------------------------------------- Total Other Financial Instruments $ 21,115 $ -- $ -- $ 21,115 =============================================================================================================== The accompanying notes are an integral part of these financial statements. Pioneer Classic Balanced Fund | Annual Report | 7/31/16 45 Schedule of Investments | 7/31/16 (continued) The following is a reconciliation of assets valued using significant unobservable inputs (Level 3): ------------------------------------------------------------------------------------------------ Corporate Bonds ------------------------------------------------------------------------------------------------ Balance as of 7/31/15 $ 1,329,910 Realized gain (loss)(1) 1,042 Change in unrealized appreciation (depreciation)(2) (36,815) Purchases 1,848,270 Sales (1,225,800) Transfers in to Level 3* -- Transfers out of Level 3* -- ------------------------------------------------------------------------------------------------ Balance as of 7/31/16 $ 1,916,607 ================================================================================================ 1 Realized gain (loss) on these securities is included in the net realized gain (loss) from investments in the Statement of Operations. 2 Unrealized appreciation (depreciation) on these securities is included in the change in unrealized appreciation (depreciation) on investments in the Statement of Operations. * Transfers are calculated on the beginning of period values. During the year ended July 31, 2016, there were no transfers between Levels 1, 2 and 3. Net change in unrealized appreciation (depreciation) of investments still held as of 7/31/16 $ (38,170) --------- The accompanying notes are an integral part of these financial statements. 46 Pioneer Classic Balanced Fund | Annual Report | 7/31/16 Statement of Assets and Liabilities | 7/31/16 ASSETS: Investment in securities (cost $259,103,624) $ 291,140,340 Cash 225,536 Restricted cash* 16,100 Receivables -- Investment securities sold 1,384,043 Fund shares sold 143,624 Dividends 142,800 Interest 717,421 Due from Pioneer Investment Management, Inc. 3,683 Other assets 53,577 ------------------------------------------------------------------------------------------------------- Total assets $ 293,827,124 ======================================================================================================= LIABILITIES: Payables -- Investment securities purchased $ 1,946,060 Fund shares repurchased 205,470 Distributions 809 Trustee fees 683 Variation margin for futures contracts 3,719 Due to affiliates 31,742 Accrued expenses 152,730 ------------------------------------------------------------------------------------------------------- Total liabilities $ 2,341,213 ======================================================================================================= NET ASSETS: Paid-in capital $ 258,907,622 Undistributed net investment income 47,498 Accumulated net realized gain on investments, futures contracts and foreign currency transactions 473,098 Net unrealized appreciation on investments 32,036,716 Net unrealized appreciation on futures contracts 21,115 Net unrealized depreciation on other assets and liabilities denominated in foreign currencies (138) ------------------------------------------------------------------------------------------------------- Total net assets $ 291,485,911 ======================================================================================================= NET ASSET VALUE PER SHARE: (No par value, unlimited number of shares authorized) Class A (based on $178,013,105/19,634,954 shares) $ 9.07 Class C (based on $48,385,239/5,377,775 shares) $ 9.00 Class K (based on $10,059/1,110 shares) $ 9.06 Class R (based on $3,276,677/361,611 shares) $ 9.06 Class Y (based on $61,800,831/6,780,189 shares) $ 9.11 MAXIMUM OFFERING PRICE: Class A ($9.07 / 95.5%) $ 9.50 ======================================================================================================= * Represents restricted cash deposited at the custodian and/or counterparty for derivative contracts. The accompanying notes are an integral part of these financial statements. Pioneer Classic Balanced Fund | Annual Report | 7/31/16 47 Statement of Operations For the Year Ended 7/31/16 INVESTMENT INCOME: Dividends $ 4,708,766 Interest 3,858,991 ------------------------------------------------------------------------------------------------------- Total investment income $ 8,567,757 ------------------------------------------------------------------------------------------------------- EXPENSES: Management fees $ 1,838,132 Transfer agent fees Class A 98,408 Class C 13,977 Class K* 6 Class R 38 Class Y 1,463 Distribution fees Class A 431,076 Class C 443,050 Class R 9,183 Shareholder communications expense 283,875 Administrative expense 128,324 Custodian fees 30,832 Registration fees 99,144 Professional fees 77,612 Printing expense 41,755 Fees and expenses of nonaffiliated Trustees 9,419 Miscellaneous 89,858 ------------------------------------------------------------------------------------------------------- Total expenses $ 3,596,152 Less fees waived and expenses reimbursed by Pioneer Investment Management, Inc. (103,362) ------------------------------------------------------------------------------------------------------- Net expenses $ 3,492,790 ------------------------------------------------------------------------------------------------------- Net investment income $ 5,074,967 ------------------------------------------------------------------------------------------------------- REALIZED AND UNREALIZED GAIN (LOSS) ON INVESTMENTS, FUTURES CONTRACTS AND FOREIGN CURRENCY TRANSACTIONS: Net realized gain (loss) on: Investments $ 2,282,090 Futures contracts 27,096 Other assets and liabilities denominated in foreign currencies 2,207 $ 2,311,393 ------------------------------------------------------------------------------------------------------- Change in net unrealized appreciation (depreciation) on: Investments $ (5,229,931) Futures contracts 17,771 Other assets and liabilities denominated in foreign currencies 71 $ (5,212,089) ------------------------------------------------------------------------------------------------------- Net realized and unrealized gain (loss) on investments, futures contracts and foreign currency transactions $ (2,900,696) ------------------------------------------------------------------------------------------------------- Net increase in net assets resulting from operations $ 2,174,271 ======================================================================================================= * Class K shares commenced operations on December 1, 2015. The accompanying notes are an integral part of these financial statements. 48 Pioneer Classic Balanced Fund | Annual Report | 7/31/16 Statements of Changes in Net Assets ------------------------------------------------------------------------------------------------------- Year Ended Year Ended 7/31/16 7/31/15 ------------------------------------------------------------------------------------------------------- FROM OPERATIONS: Net investment income (loss) $ 5,074,967 $ 4,750,540 Net realized gain (loss) on investments, futures contracts and foreign currency transactions 2,311,393 9,502,075 Change in net unrealized appreciation (depreciation) on investments, futures contracts and foreign currency transactions (5,212,089) 1,948,163 ------------------------------------------------------------------------------------------------------- Net increase in net assets resulting from operations $ 2,174,271 $ 16,200,778 ------------------------------------------------------------------------------------------------------- DISTRIBUTIONS TO SHAREOWNERS: Net investment income: Class A ($0.18 and $0.18 per share, respectively) $ (3,415,831) $ (3,247,104) Class B ($0.00 and $0.02 per share, respectively)* -- (5,579) Class C ($0.11 and $0.12 per share, respectively) (562,690) (410,104) Class K ($0.14 and $0.00 per share, respectively)** (160) -- Class R ($0.17 and $0.00 per share, respectively)*** (34,295) -- Class Y ($0.19 and $0.20 per share, respectively) (1,389,439) (1,203,785) Net realized gain: Class A ($0.18 and $0.86 per share, respectively) (3,575,561) (13,760,167) Class C ($0.18 and $0.86 per share, respectively) (893,146) (2,411,099) Class K ($0.01 and $0.00 per share, respectively)** (6) -- Class R ($0.18 and $0.00 per share, respectively)*** (24,055) -- Class Y ($0.18 and $0.86 per share, respectively) (1,337,882) (4,036,355) ------------------------------------------------------------------------------------------------------- Total distributions to shareowners $ (11,233,065) $ (25,074,193) ------------------------------------------------------------------------------------------------------- FROM FUND SHARE TRANSACTIONS: Net proceeds from sale or exchange of shares $ 76,459,396 $128,341,390 Reinvestment of distributions 10,525,965 23,695,513 Cost of shares repurchased (75,755,975) (67,572,957) ------------------------------------------------------------------------------------------------------- Net increase in net assets resulting from Fund share transactions $ 11,229,386 $ 84,463,946 ------------------------------------------------------------------------------------------------------- Net increase (decrease) in net assets $ 2,170,592 $ 75,590,531 NET ASSETS: Beginning of year $ 289,315,319 $ 213,724,788 ------------------------------------------------------------------------------------------------------- End of year $ 291,485,911 $ 289,315,319 ======================================================================================================= Undistributed net investment income $ 47,498 $ 19,725 ======================================================================================================= * Class B shares converted to Class A shares on November 10, 2014. ** Class K shares commenced operations on December 1, 2015. *** Class R shares commenced operations on July 1, 2015. The accompanying notes are an integral part of these financial statements. Pioneer Classic Balanced Fund | Annual Report | 7/31/16 49 Statements of Changes in Net Assets (continued) ------------------------------------------------------------------------------------------------------- Year Ended Year Ended Year Ended Year Ended 7/31/16 7/31/16 7/31/15 7/31/15 Shares Amount Shares Amount ------------------------------------------------------------------------------------------------------- Class A Shares sold 4,684,605 $ 41,246,439 5,905,825 $ 56,175,868 Reinvestment of distributions 758,976 6,724,998 1,763,705 16,400,748 Less shares repurchased (5,001,152) (43,980,797) (3,817,875) (36,346,941) ------------------------------------------------------------------------------------------------------- Net increase 442,429 $ 3,990,640 3,851,655 $ 36,229,675 ======================================================================================================= Class B* Shares exchanged -- $ -- 3,770 $ 36,469 Reinvestment of distributions -- -- 525 5,167 Less shares repurchased -- -- (299,353) (2,964,042) ------------------------------------------------------------------------------------------------------- Net decrease -- $ -- (295,058) $ (2,922,406) ======================================================================================================= Class C Shares sold 2,293,830 $ 20,079,184 2,415,816 $ 22,654,909 Reinvestment of distributions 145,141 1,277,307 281,939 2,601,914 Less shares repurchased (1,413,668) (12,333,741) (787,067) (7,372,667) ------------------------------------------------------------------------------------------------------- Net increase 1,025,303 $ 9,022,750 1,910,688 $ 17,884,156 ======================================================================================================= Class K** Shares sold 1,110 $ 10,000 -- $ -- Reinvestment of distributions -- -- -- -- Less shares repurchased -- -- -- -- ------------------------------------------------------------------------------------------------------- Net increase 1,110 $ 10,000 -- $ -- ======================================================================================================= Class R*** Shares sold 390,318 $ 3,431,470 14,871 $ 137,993 Reinvestment of distributions -- -- -- -- Less shares repurchased (43,578) (385,174) -- -- ------------------------------------------------------------------------------------------------------- Net increase 346,740 $ 3,046,296 14,871 $ 137,993 ======================================================================================================= Class Y Shares sold 1,321,532 $ 11,692,303 5,198,013 $ 49,336,151 Reinvestment of distributions 283,483 2,523,660 501,481 4,687,684 Less shares repurchased (2,159,359) (19,056,263) (2,195,105) (20,889,307) ------------------------------------------------------------------------------------------------------- Net increase (decrease) (554,344) $ (4,840,300) 3,504,389 $ 33,134,528 ======================================================================================================= * Class B shares converted to Class A shares on November 10, 2014. ** Class K shares commenced operations on December 1, 2015. *** Class R shares commenced operations on July 1, 2015. The accompanying notes are an integral part of these financial statements. 50 Pioneer Classic Balanced Fund | Annual Report | 7/31/16 Financial Highlights ---------------------------------------------------------------------------------------------------------------------------- Year Year Year Year Year Ended Ended Ended Ended Ended 7/31/16 7/31/15 7/31/14 7/31/13 7/31/12 ---------------------------------------------------------------------------------------------------------------------------- Class A Net asset value, beginning of period $ 9.36 $ 9.76 $ 10.62 $ 9.64 $ 9.54 ---------------------------------------------------------------------------------------------------------------------------- Increase (decrease) from investment operations: Net investment income (loss) $ 0.16(a) $ 0.18 $ 0.22 $ 0.22 $ 0.25 Net realized and unrealized gain (loss) on investments (0.09) 0.46 1.06 1.21 0.12 ---------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) from investment operations $ 0.07 $ 0.64 $ 1.28 $ 1.43 $ 0.37 ---------------------------------------------------------------------------------------------------------------------------- Distribution to shareowners: Net investment income $ (0.18) $ (0.18) $ (0.22) $ (0.24) $ (0.26) Net realized gain (0.18) (0.86) (1.92) (0.21) (0.01) ---------------------------------------------------------------------------------------------------------------------------- Total distributions $ (0.36) $ (1.04) $ (2.14) $ (0.45) $ (0.27) ---------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) in net asset value $ (0.29) $ (0.40) $ (0.86) $ 0.98 $ 0.10 ---------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $ 9.07 $ 9.36 $ 9.76 $ 10.62 $ 9.64 ============================================================================================================================ Total return* 0.88% 6.82% 13.63% 15.21% 4.01% Ratio of net expenses to average net assets 1.16% 1.16% 1.16% 1.16% 1.16% Ratio of net investment income (loss) to average net assets 1.87% 1.89% 2.22% 2.20% 2.63% Portfolio turnover rate 47% 44% 49% 41% 29% Net assets, end of period (in thousands) $178,013 $179,691 $149,672 $134,933 $123,060 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 1.22% 1.23% 1.25% 1.28% 1.30% Net investment income (loss) to average net assets 1.81% 1.82% 2.13% 2.08% 2.49% ============================================================================================================================ * 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. (a) The per share data presented above is based on the average shares outstanding for the period presented. The accompanying notes are an integral part of these financial statements. Pioneer Classic Balanced Fund | Annual Report | 7/31/16 51 Financial Highlights (continued) ------------------------------------------------------------------------------------------------------------------------- Year Year Year Year Year Ended Ended Ended Ended Ended 7/31/16 7/31/15 7/31/14 7/31/13 7/31/12 ------------------------------------------------------------------------------------------------------------------------- Class C Net asset value, beginning of period $ 9.30 $ 9.70 $ 10.58 $ 9.61 $ 9.51 ------------------------------------------------------------------------------------------------------------------------- Increase (decrease) from investment operations: Net investment income (loss) $ 0.10(a) $ 0.11 $ 0.15 $ 0.13 $ 0.17 Net realized and unrealized gain (loss) on investments (0.11) 0.47 1.04 1.22 0.12 ------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) from investment operations $ (0.01) $ 0.58 $ 1.19 $ 1.35 $ 0.29 ------------------------------------------------------------------------------------------------------------------------- Distribution to shareowners: Net investment income $ (0.11) $ (0.12) $ (0.15) $ (0.17) $ (0.18) Net realized gain (0.18) (0.86) (1.92) (0.21) (0.01) ------------------------------------------------------------------------------------------------------------------------- Total distributions $ (0.29) $ (0.98) $ (2.07) $ (0.38) $ (0.19) ------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) in net asset value $ (0.30) $ (0.40) $ (0.88) $ 0.97 $ 0.10 ------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $ 9.00 $ 9.30 $ 9.70 $ 10.58 $ 9.61 ========================================================================================================================= Total return* 0.04% 6.14%(b) 12.60% 14.35% 3.12% Ratio of net expenses to average net assets 1.93% 1.93% 1.95% 2.01% 2.02% Ratio of net investment income (loss) to average net assets 1.10% 1.10% 1.48% 1.25% 1.76% Portfolio turnover rate 47% 44% 49% 41% 29% Net assets, end of period (in thousands) $48,385 $40,470 $23,695 $28,019 $13,106 ========================================================================================================================= * 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. (a) The per share data presented above is based on the average shares outstanding for the period presented. (b) 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. 52 Pioneer Classic Balanced Fund | Annual Report | 7/31/16 -------------------------------------------------------------------------------------------- 12/1/15 to 7/31/16 -------------------------------------------------------------------------------------------- Class K Net asset value, beginning of period $ 9.01 -------------------------------------------------------------------------------------------- Increase (decrease) from investment operations: Net investment income (loss) $ 0.12(a) Net realized and unrealized gain (loss) on investments 0.08 ------------------------------------------------------------------------------------------- Net increase (decrease) from investment operations $ 0.20 -------------------------------------------------------------------------------------------- Distribution to shareowners: Net investment income $(0.14) Net realized gain (0.01) -------------------------------------------------------------------------------------------- Total distributions $(0.15) -------------------------------------------------------------------------------------------- Net increase (decrease) in net asset value $ 0.05 -------------------------------------------------------------------------------------------- Net asset value, end of period $ 9.06 ============================================================================================ Total return* 2.29%(b) Ratio of net expenses to average net assets 0.98%** Ratio of net investment income (loss) to average net assets 2.00%** Portfolio turnover rate 47% Net assets, end of period (in thousands) $ 10 ============================================================================================ * Assumes initial investment at net asset value at the beginning of each period, reinvestment of all distributions and the complete redemption of the investment at net asset value at the end of each period. ** Annualized. (a) The per share data presented above is based on the average shares outstanding for the period presented. (b) Not annualized. The accompanying notes are an integral part of these financial statements. Pioneer Classic Balanced Fund | Annual Report | 7/31/16 53 Financial Highlights (continued) --------------------------------------------------------------------------------------------- Year Ended 7/1/15 to 7/31/16 7/31/15 --------------------------------------------------------------------------------------------- Class R Net asset value, beginning of period $ 9.36 $9.27 --------------------------------------------------------------------------------------------- Increase (decrease) from investment operations: Net investment income (loss) $ 0.15(c) $0.00(a) Net realized and unrealized gain (loss) on investments (0.10) 0.09 --------------------------------------------------------------------------------------------- Net increase (decrease) from investment operations $ 0.05 $0.09 --------------------------------------------------------------------------------------------- Distribution to shareowners: Net investment income $(0.17) $ -- Net realized gain (0.18) -- --------------------------------------------------------------------------------------------- Total distributions $(0.35) $ -- --------------------------------------------------------------------------------------------- Net increase (decrease) in net asset value $(0.30) $0.09 --------------------------------------------------------------------------------------------- Net asset value, end of period $ 9.06 $9.36 ============================================================================================= Total return* 0.67% 0.97%(b) Ratio of net expenses to average net assets 1.30% 1.30%** Ratio of net investment income (loss) to average net assets 1.73% 2.73%** Portfolio turnover rate 47% 44% Net assets, end of period (in thousands) $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 1.53% 1.67%** Net investment income (loss) to average net assets 1.50% 2.36%** ============================================================================================= * Assumes initial investment at net asset value at the beginning of each period, reinvestment of all distributions and the complete redemption of the investment at net asset value at the end of each period. ** Annualized. (a) Amount rounds to less than $0.01 or $(0.01) per share. (b) Not annualized. (c) The per share data presented above is based on the average shares outstanding for the period presented. The accompanying notes are an integral part of these financial statements. 54 Pioneer Classic Balanced Fund | Annual Report | 7/31/16 ---------------------------------------------------------------------------------------------------------------- Year Year Year Year Year Ended Ended Ended Ended Ended 7/31/16 7/31/15 7/31/14 7/31/13 7/31/12 ---------------------------------------------------------------------------------------------------------------- Class Y Net asset value, beginning of period $ 9.41 $ 9.79 $ 10.66 $ 9.66 $ 9.54 ---------------------------------------------------------------------------------------------------------------- Increase (decrease) from investment operations: Net investment income (loss) $ 0.18(a) $ 0.20 $ 0.24 $ 0.23 $ 0.28 Net realized and unrealized gain (loss) on investments (0.11) 0.48 1.06 1.24 0.12 ---------------------------------------------------------------------------------------------------------------- Net increase (decrease) from investment operations $ 0.07 $ 0.68 $ 1.30 $ 1.47 $ 0.40 ---------------------------------------------------------------------------------------------------------------- Distribution to shareowners: Net investment income $ (0.19) $ (0.20) $ (0.25) $ (0.26) $ (0.27) Net realized gain (0.18) (0.86) (1.92) (0.21) (0.01) ---------------------------------------------------------------------------------------------------------------- Total distributions $ (0.37) $ (1.06) $ (2.17) $ (0.47) $ (0.28) ---------------------------------------------------------------------------------------------------------------- Net increase (decrease) in net asset value $ (0.30) $ (0.38) $ (0.87) $ 1.00 $ 0.12 ---------------------------------------------------------------------------------------------------------------- Net asset value, end of period $ 9.11 $ 9.41 $ 9.79 $ 10.66 $ 9.66 ================================================================================================================ Total return* 0.95% 7.17% 13.77% 15.71% 4.40% Ratio of net expenses to average net assets 0.95% 0.93% 0.95% 0.90% 0.88% Ratio of net investment income (loss) to average net assets 2.08% 2.10% 2.47% 2.56% 2.91% Portfolio turnover rate 47% 44% 49% 41% 29% Net assets, end of period (in thousands) $61,801 $69,014 $37,507 $26,234 $136,597 ================================================================================================================ * 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. (a) The per share data presented above is based on the average shares outstanding for the period presented. The accompanying notes are an integral part of these financial statements. Pioneer Classic Balanced Fund | Annual Report | 7/31/16 55 Notes to Financial Statements | 7/31/16 1. Organization and Significant Accounting Policies Pioneer Classic Balanced Fund (the Fund) is one of three 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. Class K shares commenced operations on December 1, 2015. Each class of shares represents an interest in the same portfolio of investments of the Fund and has identical rights (based on relative net asset values) to assets and liquidation proceeds. Share classes can bear different rates of class-specific fees and expenses such as transfer agent and distribution fees. Differences in class-specific fees and expenses will result in differences in net investment income and, therefore, the payment of different dividends from net investment income earned by each class. The Amended and Restated Declaration of Trust of the Fund gives the Board of Trustees the flexibility to specify either per-share voting or dollar-weighted voting when submitting matters for shareholder approval. Under per-share voting, each share of a class of the Fund is entitled to one vote. Under dollar-weighted voting, a shareholder's voting power is determined not by the number of shares owned, but by the dollar value of the shares on the record date. Each share class has exclusive voting rights with respect to matters affecting only that class, including with respect to the distribution plan for that class. There is no distribution plan for Class Y shares. The Fund's financial statements have been prepared in conformity with U.S. generally accepted accounting principles (U.S. GAAP) that require the management of the Fund to, among other things, make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of income, expenses and gains and losses on investments during the reporting period. Actual results could differ from those estimates. The Fund is an investment company and follows investment company accounting and reporting guidance under U.S. GAAP. The following is a summary of significant accounting policies followed by the Fund in the preparation of its financial statements: 56 Pioneer Classic Balanced Fund | Annual Report | 7/31/16 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. Foreign securities are valued in U.S. dollars based on foreign currency exchange rate quotations supplied by a third party pricing service. 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. Valuations may be supplemented by dealers and other sources, as required. 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. 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. Pioneer Classic Balanced Fund | Annual Report | 7/31/16 57 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. Cash may include overnight time deposits at approved financial institutions. Futures contracts are generally valued at the closing settlement price established by the exchange on which they are traded. Securities or loan interests for which independent pricing services 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 Pioneer Investment Management, Inc. (PIM), the Fund's investment adviser, pursuant to procedures adopted by the Fund's Board of Trustees. PIM's fair valuation team uses fair value methods approved by the Valuation Committee of the Board of Trustees. PIM'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, 2016, there were no securities 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 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 58 Pioneer Classic Balanced Fund | Annual Report | 7/31/16 respective securities, and such accretion/amortization is included in interest income. Interest income, including interest on income-bearing cash accounts, is recorded on the accrual basis, net of unrecoverable foreign taxes withheld at the applicable country rates. 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. 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 in the Statement of Operations from the effects of changes in the market price of those securities, but are included with the net realized and unrealized gain or loss on investments. 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, 2016, the Fund did not accrue any interest or penalties with respect to uncertain tax positions, which, if applicable, would be recorded as an income tax expense in the Statement of Operations. Tax returns filed within the prior three years remain subject to examination by federal and state tax authorities. The amount and character of income and capital gain distributions to shareowners are determined in accordance with federal income tax rules, which may differ from U.S. generally accepted accounting principles. Distributions in excess of net investment income or net realized gains are temporary overdistributions for financial statement purposes resulting from differences in the recognition or classification of income or distributions for Pioneer Classic Balanced Fund | Annual Report | 7/31/16 59 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, 2016, the Fund reclassified $355,221 to increase undistributed net investment income and $355,221 to decrease accumulated net realized gain on investments, futures contracts, and foreign currency transactions to reflect permanent book/tax differences. These adjustments have no impact on the net assets or results of operations. The tax character of distributions paid during the year ended July 31, 2016 and July 31, 2015 were as follows: ---------------------------------------------------------------------------- 2016 2015 ---------------------------------------------------------------------------- Distributable paid from: Ordinary income $ 5,402,415 $ 6,228,672 Long-term capital gain 5,830,650 18,845,521 ---------------------------------------------------------------------------- Total $11,233,065 $25,074,193 ============================================================================ The following shows the components of distributable earnings on a federal income tax basis at July 31, 2016: ---------------------------------------------------------------------------- 2016 ---------------------------------------------------------------------------- Distributable earnings: Undistributed long-term capital gain $ 572,269 Unrealized appreciation 32,006,020 ---------------------------------------------------------------------------- Total $ 32,578,289 ============================================================================ 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, interest accruals on preferred stock, partnerships and other holdings. E. Fund Shares The Fund records sales and repurchases of its shares as of trade date. Pioneer Funds Distributor, Inc. (PFD), the principal underwriter for the Fund and a wholly owned indirect subsidiary of UniCredit S.p.A. (UniCredit), earned $39,511 in underwriting commissions on the sale of Class A shares during the year ended July 31, 2016. 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. 60 Pioneer Classic Balanced Fund | Annual Report | 7/31/16 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 Interest rates in the U.S. recently have been historically low, so the Fund faces a heightened risk that interest rates may rise. A general rise in interest rates may cause investors to move out of fixed income securities on a large scale, which could adversely affect the price and liquidity of fixed income securities and could also result in increased redemptions from the Fund. At times, the Fund's investments may represent industries or industry sectors that are interrelated or have common risks, making the Fund more susceptible to any economic, political, or regulatory developments or other risks affecting those industries and sectors. The Fund invests in below investment grade (high yield) debt securities and preferred stocks. Some of these high yield securities may be convertible into equity securities of the issuer. Debt securities rated below investment grade are commonly referred to as "junk bonds" and are considered speculative. These securities involve greater risk of loss, are subject to greater price volatility, and are less liquid, especially during periods of economic uncertainty or change, than higher rated debt securities. The Fund's prospectus contains unaudited information regarding the Fund's principal risks. Please refer to that document when considering the Fund's principal risks. H. Insurance-linked securities (ILS) The Fund invests in event-linked bonds. Event-linked bonds are floating rate debt obligations for which the return of principal and the payment of interest are contingent on the non-occurrence of a pre-defined "trigger" event, such as a hurricane or an earthquake of a specific magnitude. The trigger event's magnitude may be based on losses to a company or industry, industry indexes or readings of scientific instruments, or may be based on specified actual losses. If a trigger event, as defined within the terms of an event-linked bond occurs, the Fund may lose a portion or all of its accrued interest and/or principal invested in such event-linked bond. The Fund is entitled to receive Pioneer Classic Balanced Fund | Annual Report | 7/31/16 61 principal and interest payments so long as no trigger event occurs of the description and magnitude specified by the instrument. In addition to the specified trigger events, event-linked bonds may expose the Fund to other risks, including but not limited to issuer (credit) default, adverse regulatory or jurisdictional interpretations and adverse tax consequences. The Fund's investments in ILS may include special purpose vehicles ("SPVs") or similar instruments structured to comprise a portion of a reinsurer's catastrophe-oriented business, known as quota share instruments (sometimes referred to as reinsurance sidecars), or to provide reinsurance relating to specific risks to insurance or reinsurance companies through a collateralized instrument, known as collateralized reinsurance. Structured reinsurance investments, which also may include industry loss warranties ("ILWs"). A traditional ILW takes the form of a bilateral reinsurance contract, but there are also products that take the form of derivatives, collateralized structures, or exchange traded instruments. Structured reinsurance investments, including quota share instruments, collateralized reinsurance investments and ILWs, generally are subject to the same risks as event-linked bonds. In addition, where the instruments are based on the performance of underlying reinsurance contracts, the Fund has limited transparency into the individual underlying contracts and therefore must rely upon the risk assessment and sound underwriting practices of the issuer. Accordingly, it may be more difficult for PIM 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 PIM 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. 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 subcustodian of the Fund. The Fund's investment adviser, PIM, is responsible for determining that the value of the collateral remains at least equal to the 62 Pioneer Classic Balanced Fund | Annual Report | 7/31/16 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, 2016, the Fund had no open repurchase agreements. J. Futures Contracts The Fund may enter into futures transactions in order to attempt to hedge against changes in interest rates, securities prices and currency exchange rates or to seek to increase total return. Futures contracts are types of derivatives. All futures contracts entered into by the Fund are traded on a futures exchange. Upon entering into a futures contract, the Fund is required to deposit with a broker an amount of cash or securities equal to the minimum "initial margin" requirements of the associated futures exchange. The amount of cash deposited with the broker as collateral at July 31, 2016, was $16,100 and is recorded within "Restricted cash" in the Statement of Assets and Liabilities. Subsequent payments for futures contracts ("variation margin") are paid or received by the Fund, depending on the daily fluctuation in the value of the contracts, and are recorded by the Fund as unrealized appreciation or depreciation. When the contract is closed, the Fund realizes a gain or loss equal to the difference between the opening and closing value of the contract. The use of futures contracts involves, to varying degrees, elements of market, interest rate, currency exchange rate and counterparty risks, which may exceed the amounts recognized by the Fund. Changes in value of the contracts may not directly correlate to the changes in value of the underlying securities. The average value of contracts open during the year ended July 31, 2016, was $224,577. At July 31, 2016, open futures contracts were as follows: ------------------------------------------------------------------------------------- Number of Unrealized Contracts Settlement Appreciation Description Counterparty Long/(Short) Month Value (Depreciation) ------------------------------------------------------------------------------------- U.S. Long Bond (CBT) Citibank NA 2 9/16 $ 348,875 $ 24,345 U.S. Ultra Bond (CBT) Citibank NA 1 9/16 190,531 4,114 U.S. 10 Year Ultra Bond (CBT) Citibank NA (10) 9/16 (1,462,031) (7,344) ------------------------------------------------------------------------------------- Total $ (922,625) $ 21,115 ===================================================================================== Pioneer Classic Balanced Fund | Annual Report | 7/31/16 63 2. Management Agreement PIM, a wholly owned indirect subsidiary of UniCredit, manages the Fund's portfolio. Management fees are 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, 2016, the effective management fee (excluding waivers and/or assumption of expenses) was equivalent to 0.65% of the Fund's average daily net assets. PIM contractually agreed to limit ordinary operating expenses to the extent required to reduce Fund expenses to 1.16%, 2.06% and 1.30% of the average daily net assets attributable to Class A, Class C and Class R shares, respectively. These expense limitations are in effect through December 1, 2017 for Class A shares and Class R shares and were in effect through December 1, 2015 for Class C shares. Fees waived and expenses reimbursed during the year ended July 31, 2016 are reflected on the Statement of Operations. There can be no assurance that PIM will extend the expense limitation agreement for a class of shares beyond the dates 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 $21,427 in management fees, administrative costs and certain other reimbursements payable to PIM at July 31, 2016. 3. Transfer Agent Effective November 2, 2015, Boston Financial Data Services, Inc. serves as the transfer agent to the Fund at negotiated rates. Transfer agent fees and payables shown on the Statement of Operations and the Statement of Assets and Liabilities, respectively, include sub-transfer agent expenses incurred through the Fund's omnibus relationship contracts. Prior to November 2, 2015, Pioneer Investment Management Shareholder Services, Inc., a wholly owned indirect subsidiary of UniCredit, provided substantially all transfer agent and shareowner services to the Fund at negotiated rates. In addition, the Fund reimbursed the transfer agent for out-of-pocket expenses incurred by the transfer agent related to shareholder communications activities such as proxy and statement mailings and outgoing phone calls. For the year ended July 31, 2016, such out-of-pocket expenses by class of shares were as follows: 64 Pioneer Classic Balanced Fund | Annual Report | 7/31/16 -------------------------------------------------------------------------------- Shareholder Communications: -------------------------------------------------------------------------------- Class A $ 159,971 Class C 34,800 Class K 4 Class R 3,600 Class Y 85,500 -------------------------------------------------------------------------------- Total $ 283,875 ================================================================================ 4. Distribution Plan The Fund has adopted a distribution plan (the Plan) pursuant to Rule 12b-1 of the Investment Company Act of 1940 with respect to its Class A, Class C and Class R shares. Pursuant to the Plan, the Fund pays PFD 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 PFD 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 PFD 0.50% of the average daily net assets attributable to Class R shares held by such plans. Included in "Due to affiliates" reflected on the Statement of Assets and Liabilities is $10,315 in distribution fees payable to PFD at July 31, 2016. The Fund also has adopted a separate service plan for Class R shares (Service Plan). The Service Plan authorizes the Fund to pay securities dealers, plan administrators or other service organizations that agree to provide certain services to retirement plans or plan participants holding shares of the Fund a service fee of up to 0.25% of the Fund's average daily net assets attributable to Class R shares held by such plans. In addition, redemptions of each class of shares (except Class R or Class Y shares) may be subject to a contingent deferred sales charge (CDSC). A CDSC of 1.00% may be imposed on redemptions of certain net asset value purchases of Class A shares within 12 months of purchase. Redemptions of Class C shares within 12 months of purchase are subject to a CDSC of 1.00% based on the lower of cost or market value of shares being redeemed. Shares purchased as part of an exchange remain subject to any CDSC that applied to the original purchase of those shares. There is no CDSC for Class R or Class Y shares. Proceeds from the CDSCs are paid to PFD. For the year ended July 31, 2016, CDSCs in the amount of $1,959 were paid to PFD. Pioneer Classic Balanced Fund | Annual Report | 7/31/16 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 credit facility in effect until February 10, 2016, was in the amount of $240 million. As of February 10, 2016, the facility is in the amount of $220 million. Under such facility, depending on the type of loan, interest on borrowings is payable at the London Interbank Offered Rate (LIBOR) plus 0.85% on an annualized basis, or the Alternate Base Rate, which is the greater of (a) the facility's administrative agent's daily announced prime rate on the borrowing date, (b) 2% plus the Federal Funds Rate on the borrowing date and (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, 2016, the Fund had no borrowings under the credit facility. 6. Additional Disclosures about Derivative Instruments and Hedging Activities The Fund's use of derivatives subjects it to the following risks: Interest rate risk relates to the fluctuations in the value of interest-bearing securities due to changes in the prevailing levels of market interest rates. Credit risk relates to the ability of the issuer of a financial instrument to make further principal or interest payments on an obligation or commitment that it has to the Fund. Foreign exchange rate risk relates to fluctuations in the value of an asset or liability due to changes in currency exchange rates. Equity risk relates to the fluctuations in the value of financial instruments as a result of changes in market prices (other than those arising from interest rate risk or foreign exchange risk), whether caused by factors specific to an individual investment, its issuer, or all factors affecting all instruments traded in a market or market segment. Commodity risk relates to the risk that the value of a commodity or commodity index will fluctuate based on increases or decreases in the commodities market and factors specific to a particular industry or commodity. 66 Pioneer Classic Balanced Fund | Annual Report | 7/31/16 The fair value of open derivative instruments (not considered to be hedging instruments for accounting disclosure purposes) by risk exposure at July 31, 2016, was as follows: ----------------------------------------------------------------------------------------- Statement of Interest Foreign Assets and Rate Credit Exchange Equity Commodity Liabilities Risk Risk Risk Risk Risk ----------------------------------------------------------------------------------------- Assets Net unrealized appreciation on futures contracts* $21,115 $-- $-- $-- $-- ----------------------------------------------------------------------------------------- Total Value $21,115 $-- $-- $-- $-- ========================================================================================= * Reflects unrealized appreciation/depreciation of futures contracts (see Note 1J). The current day's variation margin is disclosed on the Statement of Assets and Liabilities. 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, 2016 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 $27,096 $-- $-- $-- $-- ----------------------------------------------------------------------------------------- Total Value $27,096 $-- $-- $-- $-- ========================================================================================= Change in net unrealized appreciation (depreciation) on Futures contracts $17,771 $-- $-- $-- $-- ----------------------------------------------------------------------------------------- Total Value $17,771 $-- $-- $-- $-- ========================================================================================= Pioneer Classic Balanced Fund | Annual Report | 7/31/16 67 Report of Independent Registered Public Accounting Firm To the Board of Trustees of Pioneer Series Trust IV and the Shareowners of Pioneer Classic Balanced Fund: -------------------------------------------------------------------------------- We have audited the accompanying statement of assets and liabilities, including the schedule of investments, of Pioneer Classic Balanced Fund (the "Fund"), one of the funds constituting Pioneer Series Trust IV (the "Trust"), as of July 31, 2016, 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. These financial statements and the financial highlights are the responsibility of the Fund's management. Our responsibility is to express an opinion on these financial statements and financial highlights based on our audits. The financial highlights for the years ended July 31, 2013, and 2012, were audited by other auditors. Those auditors expressed an unqualified opinion on those financial statements and financial highlights in their report dated September 24, 2013. We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements and financial highlights are free of material misstatement. The Fund is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. Our audits included consideration of internal control over financial reporting as a basis for designing audit procedures that are appropriate in the circumstances, but not for the purpose of expressing an opinion on the effectiveness of the Fund's internal control over financial reporting. Accordingly, we express no such opinion. An audit also includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements, assessing the accounting principles used and significant estimates made by management, as well as evaluating the overall financial statement presentation. Our procedures included confirmation of securities owned as of July 31, 2016, by correspondence with the custodian, brokers and agent banks; where replies were not received from brokers and agent banks, we performed other auditing procedures. We believe that our audits provide a reasonable basis for our opinion. In our opinion, the financial statements and financial highlights referred to above present fairly, in all material respects, the financial position of Pioneer Classic Balanced Fund as of July 31, 2016, 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 accounting principles generally accepted in the United States of America. /s/ Deloitte & Touche LLP Boston, Massachusetts September 28, 2016 68 Pioneer Classic Balanced Fund | Annual Report | 7/31/16 ADDITIONAL INFORMATION For the year ended July 31, 2016, 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 2015 form 1099-DIV. The qualifying percentage of the Fund's ordinary income dividends for the purpose of the corporate dividends received deduction was 39.05%. The percentages of the Fund's ordinary income distributions that are exempt from nonresident alien (NRA) tax withholding resulting from qualified interest income was 73.08%. Pioneer Classic Balanced Fund | Annual Report | 7/31/16 69 Trustees, Officers and Service Providers Investment Adviser Pioneer Investment Management, Inc. Custodian and Sub-Administrator Brown Brothers Harriman & Co. Independent Registered Public Accounting Firm Deloitte & Touche LLP Principal Underwriter Pioneer Funds Distributor, Inc. Legal Counsel Morgan, Lewis & Bockius LLP Shareowner Services and Transfer Agent Boston Financial Data Services, Inc. Proxy Voting Policies and Procedures of the Fund are available without charge, upon request, by calling our toll free number (1-800-225-6292). Information regarding how the Fund voted proxies relating to portfolio securities during the most recent 12-month period ended June 30 is publicly available to shareowners at us.pioneerinvestments.com. This information is also available on the Securities and Exchange Commission's web site at www.sec.gov. Trustees and Officers The Fund's Trustees and officers are listed below, together with their principal occupations during at least the past five years. Trustees who are interested persons of the Fund within the meaning of the 1940 Act are referred to as Interested Trustees. Trustees who are not interested persons of the Fund are referred to as Independent Trustees. Each of the Trustees serves as a Trustee of each of the 45 U.S. registered investment portfolios for which Pioneer serves as investment adviser (the "Pioneer Funds"). The address for all Trustees and all officers of the Fund is 60 State Street, Boston, Massachusetts 02109. The Statement of Additional Information of the Fund includes additional information about the Trustees and is available, without charge, upon request, by calling 1-800-225-6292. 70 Pioneer Classic Balanced Fund | Annual Report | 7/31/16 Independent Trustees ------------------------------------------------------------------------------------------------------------------------------------ Name, Age and Term of Office and Other Directorships Position Held with the Fund Length of Service Principal Occupation Held by Trustee ------------------------------------------------------------------------------------------------------------------------------------ Thomas J. Perna (66) Trustee since 2006. Serves Private investor (2004 - 2008 and 2013 - Director, Broadridge Chairman of the Board until a successor trustee present); Chairman (2008 - 2013) and Chief Financial Solutions, Inc. and Trustee is elected or earlier Executive Officer (2008 - 2012), Quadriserv, (investor communications retirement or removal. Inc. (technology products for securities and securities processing lending industry); and Senior Executive provider for financial Vice President, The Bank of New York services industry) (2009 (financial and securities services) (1986 - present); Director, - 2004) Quadriserv, Inc. (2005 - 2013); and Commissioner, New Jersey State Civil Service Commission (2011 - present) ------------------------------------------------------------------------------------------------------------------------------------ David R. Bock (72) Trustee since 2005. Serves Managing Partner, Federal City Capital Director of New York Trustee until a successor trustee Advisors (corporate advisory services Mortgage Trust is elected or earlier company) (1997 - 2004 and 2008 - present); (publicly-traded mortgage retirement or removal. Interim Chief Executive Officer, Oxford REIT) (2004 - 2009, 2012 Analytica, Inc. (privately-held research - present); Director of and consulting company) (2010); Executive The Swiss Helvetia Fund, Vice President and Chief Financial Officer, Inc. (closed-end fund) I-trax, Inc. (publicly traded health care (2010 - present); services company) (2004 - 2007); and Director of Oxford Executive Vice President and Chief Analytica, Inc. (2008 - Financial Officer, Pedestal Inc. present); and Director of (internet-based mortgage trading company) Enterprise Community (2000 - 2002); Private consultant (1995 - Investment, Inc. 1997), Managing Director, Lehman Brothers (privately-held (investment banking firm) (1992 - 1995); affordable housing finance and Executive, The World Bank (1979 - 1992) company) (1985 - 2010) ------------------------------------------------------------------------------------------------------------------------------------ Benjamin M. Friedman (71) Trustee since 2008. Serves William Joseph Maier Professor of Political Trustee, Mellon Trustee until a successor trustee Economy, Harvard University (1972 - Institutional Funds is elected or earlier present) Investment Trust and retirement or removal. Mellon Institutional Funds Master Portfolio (oversaw 17 portfolios in fund complex) (1989 - 2008) ------------------------------------------------------------------------------------------------------------------------------------ Pioneer Classic Balanced Fund | Annual Report | 7/31/16 71 Independent Trustees (continued) ------------------------------------------------------------------------------------------------------------------------------------ Name, Age and Term of Office and Other Directorships Position Held with the Fund Length of Service Principal Occupation Held by Trustee ------------------------------------------------------------------------------------------------------------------------------------ Margaret B.W. Graham (69) Trustee since 2005. Serves Founding Director, Vice President and None Trustee until a successor trustee Corporate Secretary, The Winthrop Group, is elected or earlier Inc. (consulting firm) (1982 - present); retirement or removal. Desautels Faculty of Management, McGill University (1999 - present); and Manager of Research Operations and Organizational Learning, Xerox PARC, Xerox's advance research center (1990-1994) ------------------------------------------------------------------------------------------------------------------------------------ Marguerite A. Piret (68) Trustee since 2005. Serves President and Chief Executive Officer, Director of New America Trustee until a successor trustee Newbury Piret Company (investment banking High Income Fund, Inc. is elected or earlier firm) (1981 - present) (closed-end investment retirement or removal. company) (2004 - present); and Member, Board of Governors, Investment Company Institute (2000 - 2006) ------------------------------------------------------------------------------------------------------------------------------------ Fred J. Ricciardi (69) Trustee since 2014. Serves Consultant (investment company services) None Trustee until a successor trustee (2012 - present); Executive Vice President, is elected or earlier BNY Mellon (financial and investment company retirement or removal. services) (1969 - 2012); Director, BNY International Financing Corp. (financial services) (2002 - 2012); and Director, Mellon Overseas Investment Corp. (financial services) (2009 - 2012) ------------------------------------------------------------------------------------------------------------------------------------ 72 Pioneer Classic Balanced Fund | Annual Report | 7/31/16 Interested Trustee ------------------------------------------------------------------------------------------------------------------------------------ Name, Age and Term of Office and Other Directorships Position Held with the Fund Length of Service Principal Occupation Held by Trustee ------------------------------------------------------------------------------------------------------------------------------------ Kenneth J. Taubes (58)* Trustee since 2014. Serves Director and Executive Vice President (since None Trustee until a successor trustee 2008) and Chief Investment Officer, U.S. is elected or earlier (since 2010) of PIM-USA; Executive Vice retirement or removal. President of Pioneer (since 2008); Executive Vice President of Pioneer Institutional Asset Management, Inc. (since 2009); and Portfolio Manager of Pioneer (since 1999) ------------------------------------------------------------------------------------------------------------------------------------ * Mr. Taubes is an Interested Trustee because he is an officer of the Fund's investment adviser and certain of its affiliates. Pioneer Classic Balanced Fund | Annual Report | 7/31/16 73 Advisory Trustee ------------------------------------------------------------------------------------------------------------------------------------ Name, Age and Term of Office and Other Directorships Position Held with the Fund Length of Service Principal Occupation Held by Trustee ------------------------------------------------------------------------------------------------------------------------------------ Lorraine Monchak (60)** Advisory Trustee since 2014. Chief Investment Officer, 1199 SEIU Funds Trustee of Pioneer Advisory Trustee (healthcare workers union pension funds) closed-end investment (2001 - present); Vice President - investment companies (5 International Investments Group, American portfolios) (Sept. 2015 - International Group, Inc. (insurance present) 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) ------------------------------------------------------------------------------------------------------------------------------------ ** Ms. Monchak is a non-voting advisory trustee. 74 Pioneer Classic Balanced Fund | Annual Report | 7/31/16 Fund Officers ------------------------------------------------------------------------------------------------------------------------------------ Name, Age and Term of Office and Other Directorships Position Held with the Fund Length of Service Principal Occupation Held by Officer ------------------------------------------------------------------------------------------------------------------------------------ Lisa M. Jones (54) Since 2014. Serves at the Chair, Director, CEO and President of Trustee of Pioneer President and discretion of the Board. Pioneer Investment Management-USA (since closed-end investment Chief Executive Officer September 2014); Chair, Director, CEO and companies (5 portfolios) President of Pioneer Investment Management, (Sept. 2015 - present) Inc. (since September 2014); Chair, Director, CEO and President of Pioneer Funds Distributor, Inc. (since September 2014); Chair, Director, CEO and President of Pioneer Institutional Asset Management, Inc. (since September 2014); and Chair, Director, and CEO of Pioneer Investment Management Shareholder Services, Inc. (since September 2014); Managing Director, Morgan Stanley Investment Management (2010 - 2013); and Director of Institutional Business, CEO of International, Eaton Vance Management (2005 - 2010) ------------------------------------------------------------------------------------------------------------------------------------ Christopher J. Kelley (51) Since 2005. Serves at the Vice President and Associate General Counsel None Secretary and discretion of the Board. of Pioneer since January 2008; Secretary and Chief Legal Officer 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 Pioneer from July 2002 to December 2007 ------------------------------------------------------------------------------------------------------------------------------------ Carol B. Hannigan (55) Since 2010. Serves at the Fund Governance Director of Pioneer since None Assistant Secretary discretion of the Board. December 2006 and Assistant Secretary of all the Pioneer Funds since June 2010; Manager - Fund Governance of Pioneer from December 2003 to November 2006; and Senior Paralegal of Pioneer from January 2000 to November 2003 ------------------------------------------------------------------------------------------------------------------------------------ Thomas Reyes (53) Since 2010. Serves at the Senior Counsel of Pioneer since May 2013 and None Assistant Secretary discretion of the Board. Assistant Secretary of all the Pioneer Funds since June 2010; and Counsel of Pioneer from June 2007 to May 2013 ------------------------------------------------------------------------------------------------------------------------------------ Mark E. Bradley (56) Since 2008. Serves at the Vice President - Fund Treasury of Pioneer; None Treasurer and Chief discretion of the Board. Treasurer of all of the Pioneer Funds since Financial March 2008; Deputy Treasurer of Pioneer from and Accounting Officer March 2004 to February 2008; and Assistant Treasurer of all of the Pioneer Funds from March 2004 to February 2008 ------------------------------------------------------------------------------------------------------------------------------------ Pioneer Classic Balanced Fund | Annual Report | 7/31/16 75 Fund Officers (continued) ------------------------------------------------------------------------------------------------------------------------------------ Name, Age and Term of Office and Other Directorships Position Held with the Fund Length of Service Principal Occupation Held by Officer ------------------------------------------------------------------------------------------------------------------------------------ Luis I. Presutti (51) Since 2005. Serves at the Director - Fund Treasury of Pioneer; and None Assistant Treasurer discretion of the Board. Assistant Treasurer of all of the Pioneer Funds ------------------------------------------------------------------------------------------------------------------------------------ Gary Sullivan (58) Since 2005. Serves at the Fund Accounting Manager - Fund Treasury of None Assistant Treasurer discretion of the Board. Pioneer; and Assistant Treasurer of all of the Pioneer Funds ------------------------------------------------------------------------------------------------------------------------------------ David F. Johnson (36) Since 2009. Serves at the Fund Administration Manager - Fund Treasury None Assistant Treasurer discretion of the Board. of Pioneer since November 2008; 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 ------------------------------------------------------------------------------------------------------------------------------------ Jean M. Bradley (63) Since 2010. Serves at the Chief Compliance Officer of Pioneer and of None Chief Compliance Officer discretion of the Board. all the Pioneer Funds since March 2010; Chief Compliance Officer of Pioneer Institutional Asset Management, Inc. since January 2012; Chief Compliance Officer of Vanderbilt Capital Advisors, LLC since July 2012: Director of Adviser and Portfolio Compliance at Pioneer since October 2005; and Senior Compliance Officer for Columbia Management Advisers, Inc. from October 2003 to October 2005 ------------------------------------------------------------------------------------------------------------------------------------ Kelly O'Donnell (45) Since 2006. Serves at the Director - Transfer Agency Compliance of None Anti-Money Laundering discretion of the Board. Pioneer and Anti-Money Laundering Officer Officer of all the Pioneer Funds since 2006 ------------------------------------------------------------------------------------------------------------------------------------ 76 Pioneer Classic Balanced Fund | Annual Report | 7/31/16 How to Contact Pioneer We are pleased to offer a variety of convenient ways for you to contact us for assistance or information. Call us for: -------------------------------------------------------------------------------- Account Information, including existing accounts, new accounts, prospectuses, applications and service forms 1-800-225-6292 FactFone(SM) for automated fund yields, prices, account information and transactions 1-800-225-4321 Retirement plans information 1-800-622-0176 Write to us: -------------------------------------------------------------------------------- Pioneer Funds P.O. Box 55014 Boston, Massachusetts 02205-5014 Our toll-free fax 1-800-225-4240 Our internet e-mail address ask.pioneer@pioneerinvestments.com (for general questions about Pioneer only) Visit our web site: us.pioneerinvestments.com This report must be preceded or accompanied by a prospectus. The Fund files a complete schedule of investments with the Securities and Exchange Commission for the first and third quarters for each fiscal year on Form N-Q. Shareholders may view the filed Form N-Q by visiting the Commission's web site at http://www.sec.gov. The filed form may also be viewed and copied at the Commission's Public Reference Room in Washington, DC. Information regarding the operations of the Public Reference Room may be obtained by calling 1-800-SEC-0330. [LOGO] PIONEER Investments(R) Pioneer Investment Management, Inc. 60 State Street Boston, MA 02109 us.pioneerinvestments.com Securities offered through Pioneer Funds Distributor, Inc. 60 State Street, Boston, MA 02109 Underwriter of Pioneer Mutual Funds, Member SIPC (C) 2016 Pioneer Investments 19418-10-0916 Pioneer Multi-Asset Income Fund -------------------------------------------------------------------------------- Annual Report | July 31, 2016 -------------------------------------------------------------------------------- Ticker Symbols: Class A PMAIX Class C PMACX Class K PMFKX Class R PMFRX Class Y PMFYX [LOGO] PIONEER Investments(R) visit us: us.pioneerinvestments.com Table of Contents President's Letter 2 Portfolio Management Discussion 4 Portfolio Summary 12 Prices and Distributions 13 Performance Update 14 Comparing Ongoing Fund Expenses 19 Schedule of Investments 21 Financial Statements 45 Notes to Financial Statements 54 Report of Independent Registered Public Accounting Firm 70 Trustees, Officers and Service Providers 72 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/16 1 President's Letter Dear Shareowner, The first half of 2016 has featured some remarkable twists and turns in the global economy. The year began on shaky footing as surging market volatility brought about by fears of weaker global economic growth as well as falling oil prices depressed returns for investors. In the US, both equity and fixed-income markets declined significantly through the first six weeks of the year, only to recover the losses by the end of the first quarter when market sentiment shifted, due in part to accommodative monetary policies from the world's central banks. Midway through the first quarter, for example, the US Federal Reserve System (the Fed) backed off plans to raise interest rates four times in 2016, and the European Central Bank announced a more comprehensive asset-purchasing program in the hopes of encouraging lending, and boosting both inflation and economic growth. The markets responded with a solid rally. By the end of May, in fact, US equities, as measured by the Standard & Poor's 500 Index, had generated a solid year-to-date (YTD) return of 3.55%, and the YTD return (as of 5/31/16) of the Barclays Aggregate Bond Index, a common measure of the US fixed-income market, was 3.45%. As markets began to settle down, the Brexit vote - the vote confirming that the United Kingdom (UK) would exit the European Union (EU) - surprised many, and the rollercoaster ride began once again. The market sold off sharply in the first few days after the vote, then rallied as investors sought bargains created by the initial post-Brexit sell-off, and as more, less ominous information about the implications of the Brexit results came to light. From a macroeconomic perspective, Pioneer believes the negative economic impact of Brexit on the US should be more limited compared with its effects on the UK and Europe. However, we expect reduced global demand due to a higher level of uncertainty and risk aversion among investors. While the spillover effects on the US economy are unclear, we think it possible that, in the event of a significant negative economic impact, the Fed might consider other monetary policy options. Globally, we believe that central banks are ready to act and that their initial focus will be to stabilize the markets and provide liquidity, if needed. While the Brexit vote is now official, the expectation is that the actual process of separating the UK from the EU could take at least two years. Only in the next several months may we begin to see signs of what path Europe will follow as it adapts to the reality of an EU without one of its most prominent members. Over the medium-term, however, we believe uncertainties over the future of Europe and central banks' reactions will likely dominate financial markets, and we believe the news flow surrounding Brexit will continue to weigh on riskier assets. Competing for headlines, too, is the current financial condition of many European banks. Ultimately, we think that the political and monetary policy responses will be the major variables when it comes to managing an orderly 2 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/16 Brexit. In addition, as the second half of 2016 gets underway, we continue to see central bank policies as generally supportive of the US economy -- for which we maintain an expectation of modest growth this year. Aside from the Brexit-caused uncertainties, economies around the world in both developed and emerging markets are experiencing deep structural changes. Current challenges include incomplete debt deleveraging in both emerging and developed markets, where debt levels continue to grow, the transition of many emerging markets economies from export/investment-driven models to more domestic demand-driven models, and aging populations, which are reducing productivity and limiting economic growth potential (primarily in the developed markets but also in emerging markets such as China). Geopolitical instability on many fronts, the rising risk of policy mistakes, and market liquidity issues combine to increase the possibility of sharp swings in asset values. Meanwhile, in the US, as always in a presidential election year, the political rhetoric of 2016 has the potential to impact domestic sectors such as health care. Throughout Pioneer's history, we have believed in the importance of active management. During periods of market volatility, we view the value of active management as even more compelling. Our experienced and tenured investment teams focus on identifying value across global markets using proprietary research, careful risk management, and a long-term perspective. We believe our shareowners can benefit from the experience and tenure of our investment teams as well as the insights generated from our extensive research process. As always, and particularly during times of market uncertainty, we encourage you to work with your financial advisor to develop an overall investment plan that addresses both your short- and long-term goals, and to implement such a plan in a disciplined manner. We greatly appreciate the trust you have placed in us and look forward to continuing to serve you in the future. Sincerely, /s/ Lisa M. Jones Lisa M. Jones President and CEO Pioneer Investment Management USA Inc. July 31, 2016 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. These statements should not be relied upon for any other purposes. Past performance is no guarantee of future results, and there is no guarantee that market forecasts discussed will be realized. Pioneer Multi-Asset Income Fund | Annual Report | 7/31/16 3 Portfolio Management Discussion | 7/31/16 In the following interview, portfolio managers Marco Pirondini and Tracy Wright discuss Pioneer Multi-Asset Income Fund's investment strategies and performance during the 12-month reporting period ended July 31, 2016, along with their outlook for the coming months. Mr. Pirondini, Executive Vice President, Head of Equities, U.S., and a portfolio manager at Pioneer, and Ms. Wright, a senior vice president and portfolio manager at Pioneer, co-manage the Fund along with Michele Garau, a senior vice president and a portfolio manager at Pioneer, and Charles Melchreit, a senior vice president, Director of Investment Grade, and a portfolio manager at Pioneer. Q How did the Fund perform during the 12-month period ended July 31, 2016? A The Fund's Class A shares returned 0.81% at net asset value during the 12-month period ended July 31, 2016, while the Fund's benchmarks, the Barclays Aggregate Bond Index (the Barclays Index) and the Morgan Stanley Capital International Index (MSCI) All Country World ND Index (the MSCI Index)(1), returned 5.94% and -0.44%, respectively. During the same period, the average return of the 353 mutual funds in Lipper's Mixed-Asset Target Allocation Conservative Funds category was 2.89%, and the average return of the 566 mutual funds in Morningstar's Conservative Allocation Funds category was 2.59%. Q How would you describe the global investment environment during the 12-month period ended July 31, 2016? A The 12-month period was characterized by heightened volatility across many asset classes, as investor sentiment shifted in response to global macroeconomic conditions. During the first seven months of the period (through about mid-February 2016), China's devaluation of its currency in August 2015, concerns about credit and liquidity risk in the U.S. corporate bond market at year-end 2015, and a renewed decline in oil prices in the (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 | 7/31/16 early weeks of 2016 contributed to a sell-off in higher-risk assets. This, in turn, spurred increased demand for more conservative investments, such as U.S. Treasuries and investment-grade bonds. In the middle of February 2016, the outlook started to brighten. High-yield bonds, especially in the battered energy sector, began to recover after oil prices appeared to bottom. Equities and the emerging markets soon followed suit as better-than-expected U.S. employment and manufacturing data and supportive monetary policies from central bankers around the globe also helped to lift investors' spirits. With the return of investor confidence, the markets rebounded for much of the remainder of the 12-month period, with many higher-risk asset classes finishing up in positive territory. The surprise victory by the "Leave" side in the United Kingdom's June referendum vote to determine the country's future with regard to membership in the European Union caused a brief market sell-off, but the so-called "Brexit" decision did not interrupt the rally for long, as the markets quickly regained their footing (and recovered their losses) within days of the announcement. In spite of the market volatility, global bonds and U.S. stocks each delivered positive performance during the period. U.S. equities, as measured by the Standard & Poor's 500 Index, returned 5.60% for the period, while global bonds, as measured by the Citigroup World Government Bond Index, returned a robust 11.32%. During the second half of the 12-month period, the price recoveries in U.S. high-yield bonds, commodities, and emerging markets debt were especially noteworthy. On the other hand, international equities struggled, as the MSCI All Country World (ex-U.S.) Index returned -5.08%, and the MSCI Europe Index returned -9.75%. Most areas of the global economy advanced during the period, led by the more defensive utilities, information technology, and telecommunication services sectors. With their profits pinched by low, even negative interest rates, companies in the financials sector struggled the most during the period. The health care and energy sectors also struggled, although energy companies did rebound somewhat after oil prices stabilized about six weeks into 2016, and then began increasing. Pioneer Multi-Asset Income Fund | Annual Report | 7/31/16 5 Q What were the primary factors driving the Fund's performance relative to its benchmarks during the 12-month period ended July 31, 2016? A In managing the Fund, we employ a flexible, go-anywhere investment approach to adapt to changing market conditions and to generate both attractive monthly income and total return performance. As a multi-asset portfolio that can invest in a wide range of fixed-income and equity securities, the Fund's performance will generally fall between that of the Barclays Index, a pure bond index, and the MSCI Index, a pure equity index. This was especially true during the 12-month period ended July 31, 2016, since the markets at various times exhibited either extremely bearish (risk-off) sentiment that favored bonds, or bullish (risk-on) sentiment that favored stocks. The Fund's underperformance relative to its benchmarks derived primarily from an overweight portfolio exposure to the high-yield market as well as an overweight to international equities. The final six months of 2015, and the first month of 2016, were particularly difficult times for the high-yield asset class, and for equities in general. However, with investors beginning to regain confidence by February 2016, U.S. high-yield bonds rallied for the balance of the 12-month period. Further monetary and fiscal stimulus by global central banks and continued strength in U.S. economic data reports also supported investor enthusiasm. The Federal Reserve's (the Fed's) unexpectedly dovish announcement in March, which signaled its expectation of a maximum of just two rate increases in 2016 - down from an initial estimate of four in December 2015 when the Fed began to tighten interest rates - was an additional tailwind. The rally in high yield over the second half of the Fund's fiscal year was not enough, however, to overcome the negative effects on benchmark-relative returns of the portfolio's overweight allocation during the first half of the period, when the performance of high-yield securities lagged. During the early months of the period as the markets saw a flight to quality, investment-grade corporate bonds and agency mortgage-backed securities (MBS) rallied. Unfortunately, those asset classes, which offered lower yields in exchange for greater safety, represented underweights in the portfolio relative to the Barclays Index. The Fund is underweight in those asset classes because we continued to believe that there was better long-term value available in other areas of the fixed-income markets. Accordingly, the Fund's underweights to agency MBS and investment-grade corporates detracted from benchmark-relative performance when the asset classes 6 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/16 rallied. On the other hand, allocations to insurance-linked securities and municipal bonds, while representing small weightings in the portfolio, augmented the Fund's benchmark-relative results during the 12-month reporting period. With regard to the portfolio's equity positioning, from a sector allocation perspective, the Fund was overweight in health care and large, stable information technology companies, and underweight in the poorer-performing financials sector. All of those allocation decisions aided the Fund's benchmark-relative returns during the period; however, as we mentioned earlier, an overweight to international equities detracted from relative performance and negated the positive effects of our sector allocation decisions. Q What changes did you make to the Fund's positioning during the 12-month period ended July 31, 2016? A We did not dramatically change the structure of the Fund's portfolio during the reporting period. However, we did make some changes at the margins to lock in gains and to reinvest the proceeds from those sales in securities that we thought offered better value. In the second half of the reporting period (February through July 2016), we increased the Fund's exposure to emerging markets bonds. The decision proved rewarding, as the asset class rallied strongly over the final months of the 12-month period. We believe emerging markets bonds appear to be in a more resilient position, and feel that they offer additional yield advantages over the compressed returns available in developed markets. The dovish monetary policies of central banks in the developed markets are also supportive of emerging markets bonds, in our view. As prospects for the high-yield market started to improve during the 12-month period, we increased the portfolio's allocation to the energy sector, as the rebound in oil prices revealed attractive investment opportunities. We also slightly increased the Fund's high-yield investments in the health care and utilities sectors when we found compelling value opportunities, thus diversifying* the portfolio's holdings and upgrading the overall credit profile of its high-yield exposure. * Diversification does not assure a profit nor protect against loss. Pioneer Multi-Asset Income Fund | Annual Report | 7/31/16 7 On July 31, 2016, the Fund's investments had a strategic emphasis on U.S. high-yield bonds and U.S. equities, given prevailing market conditions. At period end, approximately 53% of the Fund's positions were in equities (32% in U.S. stocks), and 47% were in fixed income (30% in U.S. corporate bonds, the vast majority of which were high-yield securities). Q Did the use of derivative investments have a material effect on the Fund's performance during the 12-month period ended July 31, 2016? A We hedged some of the portfolio's equity risk during the reporting period, primarily through the use of short futures and put options tied to the Standard & Poor's 500 Index, while deploying more cash from time to time to reduce the pressure of market sell-offs. (A "short" futures contract is an agreement to sell a commodity or financial instrument at a predetermined price at a future date. A "put" option is an agreement giving the contract holder the right, but not the obligation, to sell a security at a pre-determined price for a pre-determined amount of time, regardless of the current market price of the security.) The hedging strategy benefited the Fund's performance when markets declined, but hindered performance to a certain degree when markets rallied. The net result of the hedging strategy was negligible from a performance perspective, but the Fund did experience less volatility during the reporting period than otherwise would have been the case. We plan to continue to employ tactical hedges in the portfolio, as we believe they help protect the Fund in times of stress, while not impairing its ability to generate income. Q Can you discuss the factors that influenced the Fund's yield, or distributions to shareholders, during the 12-month period ended July 31, 2016? A The Fund's share price encountered heightened volatility during the period, but the income that the portfolio generated from its tactical allocations among high-yield bonds and dividend-paying stocks helped to generate a very competitive yield, allowing us to deliver on the Fund's primary goal of maintaining a high level of monthly income for shareholders. The Fund made a special distribution of $0.092 per share in December 2015, which included the $0.0500 monthly dividend** as well as an extra $0.042 payout, which was the result of higher-than-expected income generation from the portfolio's equity holdings. ** Dividends are not guaranteed. 8 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/16 Q What is your outlook for the coming months? A We are cautious in our view of the markets given relatively high valuations and geopolitical uncertainty. Other risks to our outlook include increased market volatility as the Fed weighs the timing of short-term rate hikes, the long-term impact of the Brexit vote, and the repercussions of lower - even negative - interest rates. With that in mind, we continue to favor U.S. stocks over European equities. However, the recent sell-off in the United Kingdom and European equity markets has created opportunities for investors with a medium- to long-term outlook. In the high-yield market, we believe oil and commodity prices will drive much of the asset class's returns for the foreseeable future. Fundamentals in sectors outside of energy and metals & mining are much stronger, and many companies continue to have strong profit margins and healthy balance sheets. In the current low-interest-rate, low-growth environment, with central banks pledging to support the stability of the global financial system, we are taking a defensive approach to risk assets, especially equities. After five years of strong returns in both the fixed-income and equity markets, we believe we are entering a phase of decent, but not robust returns. Against that backdrop, we continue to believe the Fund's diversified investment approach, both by geography and by asset class, can provide investors with competitive returns accompanied by lower volatility than one might expect from more traditional strategies that invest based on static allocations, or have limited exposures to certain asset classes and geographies. Pioneer Multi-Asset Income Fund | Annual Report | 7/31/16 9 Please refer to the Schedule of Investments on pages 21-44 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 event-linked bonds. The return of principal and the payment of interest on event-linked bonds 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. 10 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/16 Investments in equity securities are subject to price fluctuation. 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 Pioneer Investments 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. Pioneer Multi-Asset Income Fund | Annual Report | 7/31/16 11 Portfolio Summary | 7/31/16 Portfolio Diversification* -------------------------------------------------------------------------------- (As a percentage of total investment portfolio) [THE FOLLOWING DATA WAS REPRESENTED AS A PIE CHART IN THE PRINTED MATERIAL] U.S. Common Stocks 32.4% U.S. Corporate Bonds 30.3% International Common Stocks 20.6% Foreign Government Bonds 6.0% International Corporate Bonds 3.6% Senior Secured Loans 1.5% Equity Linked Note 1.4% Asset Backed Securities 1.3% Collateralized Mortgage Obligations 1.1% Mutual Fund Closed End 0.5% Mutual Funds 0.4% Convertible Preferred Stocks 0.4% Convertible Corporate Bonds 0.3% International Preferred Stocks 0.2% * Includes investments in Insurance Linked Securities totaling 0.6% of total investment portfolio. Sector Distribution -------------------------------------------------------------------------------- (As a percentage of total long-term holdings) [THE FOLLOWING DATA WAS REPRESENTED AS A PIE CHART IN THE PRINTED MATERIAL] Financials 28.8% Health Care 17.4% Information Technology 10.5% Consumer Discretionary 7.7% Telecommunication Services 7.5% Energy 6.2% Materials 6.1% Industrials 6.0% Consumer Staples 4.8% Government 3.0% Utilities 2.0% 10 Largest Holdings -------------------------------------------------------------------------------- (As a percentage of total long-term holdings)** 1. Pfizer, Inc. 3.63% -------------------------------------------------------------------------------- 2. AT&T, Inc. 3.59 -------------------------------------------------------------------------------- 3. Novartis AG 3.46 -------------------------------------------------------------------------------- 4. Apple, Inc. 3.27 -------------------------------------------------------------------------------- 5. Microsoft Corp. 2.74 -------------------------------------------------------------------------------- 6. Johnson & Johnson 2.57 -------------------------------------------------------------------------------- 7. Shire Plc 2.57 -------------------------------------------------------------------------------- 8. Rio Tinto Plc 2.02 -------------------------------------------------------------------------------- 9. Synchrony Financial 1.84 -------------------------------------------------------------------------------- 10. Cardinal Health, Inc. 1.72 -------------------------------------------------------------------------------- ** This list excludes temporary cash investments and derivative instruments. 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 listed. 12 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/16 Prices and Distributions | 7/31/16 Net Asset Value per Share -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- Class 7/31/16 7/31/15 -------------------------------------------------------------------------------- A $10.57 $11.15 -------------------------------------------------------------------------------- C $10.55 $11.12 -------------------------------------------------------------------------------- K $10.69 $11.15 -------------------------------------------------------------------------------- R $10.62 $11.20 -------------------------------------------------------------------------------- Y $10.56 $11.14 -------------------------------------------------------------------------------- Distributions per Share: 8/1/15-7/31/16 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- Net Investment Short-Term Long-Term Class Income Capital Gains Capital Gains -------------------------------------------------------------------------------- A 0.6324 $-- $-- -------------------------------------------------------------------------------- C 0.5459 $-- $-- -------------------------------------------------------------------------------- K 0.6601 $-- $-- -------------------------------------------------------------------------------- R 0.5916 $-- $-- -------------------------------------------------------------------------------- Y 0.6522 $-- $-- -------------------------------------------------------------------------------- Index Definitions -------------------------------------------------------------------------------- The Barclays 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 14-18. Pioneer Multi-Asset Income Fund | Annual Report | 7/31/16 13 Performance Update | 7/31/16 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 Barclays Aggregate Bond Index and the MSCI All Country World ND Index. Average Annual Total Returns (As of July 31, 2016) -------------------------------------------------------------------------------- MSCI All Net Public Barclays Country Asset Offering Aggregate World Value Price Bond ND Period (NAV) (POP) Index Index -------------------------------------------------------------------------------- Life-of-Class 12/22/11 7.62% 6.55% 3.15% 9.74% 1 Year 0.81 -3.77 5.94 -0.44 -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated December 1, 2015) -------------------------------------------------------------------------------- Gross Net -------------------------------------------------------------------------------- 1.43% 1.33% -------------------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $10,000 Investment Pioneer Multi-Asset Barclays Aggregate MSCI All Country Income Fund Bond Index World ND Index 12/11 $ 9,550 $10,000 $10,000 7/12 $10,372 $10,378 $10,710 7/13 $11,775 $10,181 $12,905 7/14 $13,396 $10,585 $14,958 7/15 $13,249 $10,884 $15,382 7/16 $13,356 $11,530 $15,314 Call 1-800-225-6292 or visit us.pioneerinvestments.com for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. NAV results represent the percent change in net asset value per share. Returns would have been lower had sales charges been reflected. POP returns reflect deduction of maximum 4.50% sales charge. All results are historical and assume the reinvestment of dividends and capital gains. Other share classes are available for which performance and expenses will differ. Performance results reflect any applicable expense waivers in effect during the periods shown. Without such waivers Fund performance would be lower. Waivers may not be in effect for all funds. Certain fee waivers are contractual through a specified period. Otherwise, fee waivers can be rescinded at any time. See the prospectus and financial statements for more information. The net expense ratio reflects the contractual expense limitation currently in effect through December 1, 2017, for Class A shares. There can be no assurance that Pioneer will extend the expense limitation beyond such time. Please see the prospectus for more information. Please see the financial highlights for more recent expense ratios. 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. 14 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/16 Performance Update | 7/31/16 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 Barclays Aggregate Bond Index and the MSCI All Country World ND Index. Average Annual Total Returns (As of July 31, 2016) -------------------------------------------------------------------------------- MSCI All Barclays Country Aggregate World If If Bond ND Period Held Redeemed Index Index -------------------------------------------------------------------------------- Life-of-Class 12/22/11 6.73% 6.73% 3.15% 9.74% 1 Year 0.06 0.06 5.94 -0.44 -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated December 1, 2015) -------------------------------------------------------------------------------- Gross -------------------------------------------------------------------------------- 2.17% -------------------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $10,000 Investment Pioneer Multi-Asset Barclays Aggregate MSCI All Country Income Fund Bond Index World ND Index 12/11 $10,000 $10,000 $10,000 7/12 $10,812 $10,378 $10,710 7/13 $12,151 $10,181 $12,905 7/14 $13,711 $10,585 $14,958 7/15 $13,452 $10,884 $15,382 7/16 $13,460 $11,530 $15,314 Call 1-800-225-6292 or visit us.pioneerinvestments.com for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. Class C shares held for less than one year are subject to a 1% contingent deferred sales charge (CDSC). "If Held" results represent the percent change in net asset value per share. Returns would have been lower had sales charges been reflected. All results are historical and assume the reinvestment of dividends and capital gains. Other share classes are available for which performance and expenses will differ. Performance results reflect any applicable expense waivers in effect during the periods shown. Without such waivers Fund performance would be lower. Waivers may not be in effect for all funds. Certain fee waivers are contractual through a specified period. Otherwise, fee waivers can be rescinded at any time. See the prospectus and financial statements for more information. Please see the financial highlights for more recent expense ratios. 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. Pioneer Multi-Asset Income Fund | Annual Report | 7/31/16 15 Performance Update | 7/31/16 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 Barclays Aggregate Bond Index and the MSCI All Country World ND Index. Average Annual Total Returns (As of July 31, 2016) -------------------------------------------------------------------------------- MSCI All Net Barclays Country Asset Aggregate World Value Bond ND Period (NAV) Index Index -------------------------------------------------------------------------------- Life of Fund 12/22/11 7.99% 3.15% 9.74% 1 Year 2.20 5.94 -0.44 -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated December 1, 2015) -------------------------------------------------------------------------------- Gross -------------------------------------------------------------------------------- 1.11% -------------------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $5 Million Investment Pioneer Multi-Asset Barclays Aggregate MSCI All Country Income Fund Bond Index World ND Index 12/11 $5,000,000 $5,000,000 $5,000,000 7/12 $5,429,039 $5,189,203 $5,355,020 7/13 $6,163,206 $5,090,349 $6,452,651 7/14 $7,011,748 $5,292,408 $7,479,183 7/15 $6,949,675 $5,441,860 $7,691,060 7/16 $7,102,827 $5,764,837 $7,657,028 Call 1-800-225-6292 or visit us.pioneerinvestments.com for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. The performance shown for Class K shares for the period prior to the commencement of operations of Class K shares on December 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. Please see the financial highlights for more recent expense ratios. 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. 16 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/16 Performance Update | 7/31/16 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 Barclays Aggregate Bond Index and the MSCI All Country World ND Index. Average Annual Total Returns (As of July 31, 2016) -------------------------------------------------------------------------------- MSCI All Net Barclays Country Asset Aggregate World Value Bond ND Period (NAV) Index Index -------------------------------------------------------------------------------- Life of Fund 12/22/11 7.58% 3.15% 9.74% 1 Year 0.41 5.94 -0.44 -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated December 1, 2015) -------------------------------------------------------------------------------- Gross -------------------------------------------------------------------------------- 1.88% -------------------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $10,000 Investment Pioneer Multi-Asset Barclays Aggregate MSCI All Country Income Fund Bond Index World ND Index 12/11 $10,000 $10,000 $10,000 7/12 $10,858 $10,378 $10,710 7/13 $12,326 $10,181 $12,905 7/14 $14,024 $10,585 $14,958 7/15 $13,903 $10,884 $15,382 7/16 $13,959 $11,530 $15,314 Call 1-800-225-6292 or visit us.pioneerinvestments.com for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. The performance shown for Class R shares for the period prior to the commencement of operations of Class R shares on 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. Please see the financial highlights for more recent expense ratios. 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. Pioneer Multi-Asset Income Fund | Annual Report | 7/31/16 17 Performance Update | 7/31/16 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 Barclays Aggregate Bond Index and the MSCI All Country World ND Index. Average Annual Total Returns (As of July 31, 2016) -------------------------------------------------------------------------------- MSCI All Net Barclays Country Asset Aggregate World Value Bond ND Period (NAV) Index Index -------------------------------------------------------------------------------- Life-of-Class 12/22/11 7.80% 3.15% 9.74% 1 Year 1.00 5.94 -0.44 -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated December 1, 2015) -------------------------------------------------------------------------------- Gross Net -------------------------------------------------------------------------------- 1.19% 1.13% -------------------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $5 Million Investment Pioneer Multi-Asset Barclays Aggregate MSCI All Country Income Fund Bond Index World ND Index 12/11 $5,000,000 $5,000,000 $5,000,000 7/12 $5,438,634 $5,189,203 $5,355,020 7/13 $6,174,439 $5,090,349 $6,452,651 7/14 $7,039,302 $5,292,408 $7,479,183 7/15 $6,976,906 $5,441,860 $7,691,060 7/16 $7,046,997 $5,764,837 $7,657,028 Call 1-800-225-6292 or visit us.pioneerinvestments.com for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. Class Y shares are not subject to sales charges and are available for limited groups of eligible investors, including institutional investors. All results are historical and assume the reinvestment of dividends and capital gains. Other share classes are available for which performance and expenses will differ. Performance results reflect any applicable expense waivers in effect during the periods shown. Without such waivers Fund performance would be lower. Waivers may not be in effect for all funds. Certain fee waivers are contractual through a specified period. Otherwise, fee waivers can be rescinded at any time. See the prospectus and financial statements for more information. The net expense ratio reflects the contractual expense limitation currently in effect through December 1, 2017, for Class Y shares. There can be no assurance that Pioneer will extend the expense limitation beyond such time. Please see the prospectus for more information. Please see the financial highlights for more recent expense ratios. 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. 18 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/16 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, 2016, through July 31, 2016. ---------------------------------------------------------------------------------------------------- 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 2/1/16 ---------------------------------------------------------------------------------------------------- Ending Account Value $1,103.32 $1,099.08 $1,116.09 $1,100.14 $1,104.43 (after expenses) on 7/31/16 ---------------------------------------------------------------------------------------------------- Expenses Paid $ 4.45 $ 8.82 $ 3.16 $ 7.15 $ 3.40 During Period* ---------------------------------------------------------------------------------------------------- * Expenses are equal to the Fund's annualized expense ratio of 0.85%, 1.69%, 0.60%, 1.37%, and 0.65% for Class A, Class C, Class K, Class R, and Class Y respectively, multiplied by the average account value over the period multiplied by 182/366 (to reflect the one-half year period). Pioneer Multi-Asset Income Fund | Annual Report | 7/31/16 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, 2016, through July 31, 2016. ---------------------------------------------------------------------------------------------------- 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 2/1/16 ---------------------------------------------------------------------------------------------------- Ending Account Value $1,020.64 $1,016.46 $1,021.88 $1,018.05 $1,021.63 (after expenses) on 7/31/16 ---------------------------------------------------------------------------------------------------- Expenses Paid $ 4.27 $ 8.47 $ 3.02 $ 6.87 $ 3.27 During Period* ---------------------------------------------------------------------------------------------------- * Expenses are equal to the Fund's annualized expense ratio of 0.85%, 1.69%, 0.60%, 1.37%, and 0.65% for Class A, Class C, Class K, Class R, and Class Y respectively, multiplied by the average account value over the period multiplied by 182/366 (to reflect the one-half year period). 20 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/16 Schedule of Investments | 7/31/16 -------------------------------------------------------------------------------------------------------- Floating Principal Rate (b) Amount ($) (unaudited) Value -------------------------------------------------------------------------------------------------------- CONVERTIBLE CORPORATE BONDS -- 0.2% ENERGY -- 0.0%+ Oil & Gas Exploration & Production -- 0.0%+ 515,000 Cobalt International Energy, Inc., 2.625%, 12/1/19 $ 230,141 --------------- Total Energy $ 230,141 -------------------------------------------------------------------------------------------------------- MATERIALS -- 0.0%+ Diversified Metals & Mining -- 0.0%+ 30,096 Mirabela Nickel, Ltd., 9.5%, 6/24/19 (144A) (0.0% cash, 9.5% PIK) (PIK) (c) $ 2,558 --------------- Total Materials $ 2,558 -------------------------------------------------------------------------------------------------------- CAPITAL GOODS -- 0.1% Electrical Components & Equipment -- 0.1% 1,410,000 General Cable Corp., 4.5%, 11/15/29 (Step) $ 946,462 --------------- Total Capital Goods $ 946,462 -------------------------------------------------------------------------------------------------------- REAL ESTATE -- 0.1% Mortgage REIT -- 0.1% 595,000 Apollo Commercial Real Estate Finance, Inc., 5.5%, 3/15/19 $ 608,016 --------------- Total Real Estate $ 608,016 -------------------------------------------------------------------------------------------------------- TOTAL CONVERTIBLE CORPORATE BONDS (Cost $2,474,789) $ 1,787,177 -------------------------------------------------------------------------------------------------------- PREFERRED STOCK -- 0.0%+ TRANSPORTATION -- 0.0%+ Air Freight & Logistics -- 0.0%+ 49 CEVA Group Plc* (e) $ 16,992 -------------------------------------------------------------------------------------------------------- TOTAL PREFERRED STOCK (Cost $48,550) $ 16,992 -------------------------------------------------------------------------------------------------------- CONVERTIBLE PREFERRED STOCKS -- 0.6% ENERGY -- 0.0%+ Oil & Gas Exploration & Production -- 0.0%+ 500 Halcon Resources Corp., 5.75%, 12/31/49 (Perpetual) $ 21,500 --------------- Total Energy $ 21,500 -------------------------------------------------------------------------------------------------------- PHARMACEUTICALS, BIOTECHNOLOGY & LIFE SCIENCES -- 0.2% Pharmaceuticals -- 0.2% 1,325 Allergan Plc, 5.5%, 3/1/18 $ 1,187,650 --------------- Total Pharmaceuticals, Biotechnology & Life Sciences $ 1,187,650 -------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Multi-Asset Income Fund | Annual Report | 7/31/16 21 Schedule of Investments | 7/31/16 (continued) -------------------------------------------------------------------------------------------------------- Floating Principal Rate (b) Amount ($) (unaudited) Value -------------------------------------------------------------------------------------------------------- BANKS -- 0.4% Diversified Banks -- 0.4% 730 Bank of America Corp., 7.25%, 12/31/49 (Perpetual) $ 880,380 1,876 Wells Fargo & Co., 7.5% (Perpetual) 2,497,444 --------------- $ 3,377,824 --------------- Total Banks $ 3,377,824 -------------------------------------------------------------------------------------------------------- TOTAL CONVERTIBLE PREFERRED STOCKS (Cost $4,622,097) $ 4,586,974 -------------------------------------------------------------------------------------------------------- -------------------------------------------------------------------------------------------------------- Shares -------------------------------------------------------------------------------------------------------- COMMON STOCKS -- 51.8% ENERGY -- 0.5% Oil & Gas Exploration & Production -- 0.0% 40,000 Societatea Nationala de Gaze Naturale ROMGAZ SA $ 228,574 -------------------------------------------------------------------------------------------------------- Oil & Gas Storage & Transportation -- 0.5% 1,000,000 Avance Gas Holding, Ltd. $ 3,226,725 --------------- Total Energy $ 3,455,299 -------------------------------------------------------------------------------------------------------- MATERIALS -- 2.4% Commodity Chemicals -- 0.1% 719,162 Chevron Lubricants Lanka Plc $ 812,537 -------------------------------------------------------------------------------------------------------- Construction Materials -- 0.3% 77,307 CRH Plc $ 2,356,289 -------------------------------------------------------------------------------------------------------- Diversified Metals & Mining -- 2.0% 451,263 Rio Tinto Plc $ 14,707,334 --------------- Total Materials $ 17,876,160 -------------------------------------------------------------------------------------------------------- CAPITAL GOODS -- 0.9% Aerospace & Defense -- 0.4% 426,927 BAE Systems Plc $ 3,018,556 -------------------------------------------------------------------------------------------------------- Building Products -- 0.2% 2,118,256 Ras Al Khaimah Ceramics* $ 1,845,522 -------------------------------------------------------------------------------------------------------- Heavy Electrical Equipment -- 0.3% 156,000 Mitsubishi Electric Corp. $ 1,861,785 -------------------------------------------------------------------------------------------------------- Industrial Machinery -- 0.0%+ 3,071 Liberty Tire Recycling LLC (c) $ 31 --------------- Total Capital Goods $ 6,725,894 -------------------------------------------------------------------------------------------------------- TRANSPORTATION -- 0.4% Air Freight & Logistics -- 0.0%+ 22 CEVA Group Plc* $ 7,850 -------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 22 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/16 -------------------------------------------------------------------------------------------------------- Shares Value -------------------------------------------------------------------------------------------------------- Airlines -- 0.4% 203,558 easyJet Plc $ 2,805,713 --------------- Total Transportation $ 2,813,563 -------------------------------------------------------------------------------------------------------- AUTOMOBILES & COMPONENTS -- 0.2% Automobile Manufacturers -- 0.2% 45,100 Fuji Heavy Industries, Ltd. $ 1,774,999 --------------- Total Automobiles & Components $ 1,774,999 -------------------------------------------------------------------------------------------------------- CONSUMER DURABLES & APPAREL -- 1.5% Homebuilding -- 1.0% 158,167 PulteGroup, Inc. $ 3,349,977 290,800 Sekisui Chemical Co., Ltd. 4,301,497 --------------- $ 7,651,474 -------------------------------------------------------------------------------------------------------- Apparel, Accessories & Luxury Goods -- 0.5% 97,851 Burberry Group Plc $ 1,710,187 89,267 Moncler S.p.A.* 1,564,872 --------------- $ 3,275,059 --------------- Total Consumer Durables & Apparel $ 10,926,533 -------------------------------------------------------------------------------------------------------- CONSUMER SERVICES -- 0.2% Hotels, Resorts & Cruise Lines -- 0.2% 29,493 InterContinental Hotels Group Plc $ 1,180,097 --------------- Total Consumer Services $ 1,180,097 -------------------------------------------------------------------------------------------------------- MEDIA -- 0.7% Advertising -- 0.4% 39,014 Publicis Groupe SA $ 2,904,936 -------------------------------------------------------------------------------------------------------- Broadcasting -- 0.1% 288,100 ITV Plc $ 747,659 -------------------------------------------------------------------------------------------------------- Movies & Entertainment -- 0.2% 40,370 Viacom, Inc. (Class B) $ 1,835,624 --------------- Total Media $ 5,488,219 -------------------------------------------------------------------------------------------------------- FOOD & STAPLES RETAILING -- 1.4% Drug Retail -- 1.4% 115,818 CVS Health Corp. $ 10,738,645 --------------- Total Food & Staples Retailing $ 10,738,645 -------------------------------------------------------------------------------------------------------- FOOD, BEVERAGE & TOBACCO -- 1.5% Distillers & Vintners -- 0.1% 74,741,212 Vina San Pedro Tarapaca SA $ 775,969 -------------------------------------------------------------------------------------------------------- Soft Drinks -- 1.4% 1,250,777 Britvic Plc $ 10,350,570 -------------------------------------------------------------------------------------------------------- Tobacco -- 0.0%+ 5,275 Altria Group, Inc. $ 357,118 --------------- Total Food, Beverage & Tobacco $ 11,483,657 -------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Multi-Asset Income Fund | Annual Report | 7/31/16 23 Schedule of Investments | 7/31/16 (continued) -------------------------------------------------------------------------------------------------------- Shares Value -------------------------------------------------------------------------------------------------------- HEALTH CARE EQUIPMENT & SERVICES -- 2.1% Health Care Equipment -- 0.4% 33,501 Medtronic Plc $ 2,935,693 -------------------------------------------------------------------------------------------------------- Health Care Distributors -- 1.7% 149,991 Cardinal Health, Inc. $ 12,539,248 --------------- Total Health Care Equipment & Services $ 15,474,941 -------------------------------------------------------------------------------------------------------- PHARMACEUTICALS, BIOTECHNOLOGY & LIFE SCIENCES -- 11.9% Biotechnology -- 2.5% 290,884 Shire Plc $ 18,760,411 -------------------------------------------------------------------------------------------------------- Pharmaceuticals -- 9.4% 149,947 Johnson & Johnson $ 18,777,863 304,570 Novartis AG 25,252,422 716,774 Pfizer, Inc. 26,441,793 --------------- $ 70,472,078 --------------- Total Pharmaceuticals, Biotechnology & Life Sciences $ 89,232,489 -------------------------------------------------------------------------------------------------------- BANKS -- 2.0% Diversified Banks -- 0.8% 979,962 Aldermore Group Plc $ 1,804,848 131,063 Grupo Financiero Banorte SAB de CV 717,321 60,026 JPMorgan Chase & Co. 3,839,863 --------------- $ 6,362,032 -------------------------------------------------------------------------------------------------------- Regional Banks -- 1.2% 107,298 The PNC Financial Services Group, Inc. $ 8,868,180 --------------- Total Banks $ 15,230,212 -------------------------------------------------------------------------------------------------------- DIVERSIFIED FINANCIALS -- 8.0% Specialized Finance -- 0.4% 192,400 Japan Exchange Group, Inc. $ 2,772,416 -------------------------------------------------------------------------------------------------------- Consumer Finance -- 3.1% 166,148 Discover Financial Services, Inc. $ 9,443,852 480,127 Synchrony Financial 13,385,941 --------------- $ 22,829,793 -------------------------------------------------------------------------------------------------------- Asset Management & Custody Banks -- 4.5% 1,923,283 Apollo Investment Corp. $ 11,078,110 739,396 Ares Capital Corp. 11,194,455 1,229,677 Fifth Street Finance Corp. 6,886,191 31,950 State Street Corp. 2,101,671 10,000 TCP Capital Corp. 159,000 209,367 TriplePoint Venture Growth BDC Corp. 2,397,252 --------------- $ 33,816,679 --------------- Total Diversified Financials $ 59,418,888 -------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 24 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/16 -------------------------------------------------------------------------------------------------------- Shares Value -------------------------------------------------------------------------------------------------------- INSURANCE -- 0.3% Reinsurance -- 0.3% 23,316 Swiss Re AG $ 1,958,448 --------------- Total Insurance $ 1,958,448 -------------------------------------------------------------------------------------------------------- REAL ESTATE -- 5.4% Diversified REIT -- 0.3% 206,098 Merlin Properties Socimi SA $ 2,359,476 -------------------------------------------------------------------------------------------------------- Industrial REIT -- 1.5% 4,606,700 Mapletree Industrial Trust $ 6,221,786 4,707,400 Mapletree Logistics Trust 3,705,784 694,055 PLA Administradora Industrial S de RL de CV 1,148,837 --------------- $ 11,076,407 -------------------------------------------------------------------------------------------------------- Hotel & Resort REIT -- 0.2% 1,500 Japan Hotel Real Estate Investment Trust Investment Corp. $ 1,267,461 -------------------------------------------------------------------------------------------------------- Office REIT -- 0.3% 169,405 Alstria Office REIT-AG $ 2,357,965 -------------------------------------------------------------------------------------------------------- Retail REIT -- 0.2% 24,932 Wereldhave NV $ 1,206,386 -------------------------------------------------------------------------------------------------------- Specialized REIT -- 0.9% 78,144 EPR Properties $ 6,565,659 30,400 Keppel DC Real Estate Investment Trust 27,448 --------------- $ 6,593,107 -------------------------------------------------------------------------------------------------------- Diversified Real Estate Activities -- 1.3% 1,398,300 Leopalace21 Corp. $ 10,156,745 -------------------------------------------------------------------------------------------------------- Real Estate Development -- 0.5% 284,731 TAG Immobilien AG $ 4,052,331 -------------------------------------------------------------------------------------------------------- Real Estate Services -- 0.2% 151,030 Savills Plc $ 1,397,799 --------------- Total Real Estate $ 40,467,677 -------------------------------------------------------------------------------------------------------- SOFTWARE & SERVICES -- 2.7% Systems Software -- 2.7% 352,187 Microsoft Corp. $ 19,961,959 --------------- Total Software & Services $ 19,961,959 -------------------------------------------------------------------------------------------------------- TECHNOLOGY HARDWARE & EQUIPMENT -- 5.4% Communications Equipment -- 1.6% 385,216 Cisco Systems, Inc. $ 11,760,644 -------------------------------------------------------------------------------------------------------- Computer Storage & Peripherals -- 3.2% 228,623 Apple, Inc. $ 23,824,803 -------------------------------------------------------------------------------------------------------- Computer Hardware Storage & Peripherals -- 0.3% 70,283 Neopost SA $ 1,951,838 -------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Multi-Asset Income Fund | Annual Report | 7/31/16 25 Schedule of Investments | 7/31/16 (continued) -------------------------------------------------------------------------------------------------------- Shares Value -------------------------------------------------------------------------------------------------------- Electronic Equipment Manufacturers -- 0.2% 112,278 Fitbit, Inc. $ 1,533,717 -------------------------------------------------------------------------------------------------------- Electronic Manufacturing Services -- 0.1% 315,000 Global Display Co., Ltd. $ 986,458 --------------- Total Technology Hardware & Equipment $ 40,057,460 -------------------------------------------------------------------------------------------------------- SEMICONDUCTORS & SEMICONDUCTOR EQUIPMENT -- 0.6% Semiconductors -- 0.6% 807,000 Taiwan Semiconductor Manufacturing Co., Ltd. $ 4,375,530 --------------- Total Semiconductors & Semiconductor Equipment $ 4,375,530 -------------------------------------------------------------------------------------------------------- TELECOMMUNICATION SERVICES -- 3.7% Integrated Telecommunication Services -- 3.5% 605,189 AT&T, Inc. $ 26,198,632 -------------------------------------------------------------------------------------------------------- Wireless Telecommunication Services -- 0.2% 576,449 Vodafone Group Plc $ 1,752,034 --------------- Total Telecommunication Services $ 27,950,666 -------------------------------------------------------------------------------------------------------- TOTAL COMMON STOCKS (Cost $392,931,179) $ 386,591,336 -------------------------------------------------------------------------------------------------------- -------------------------------------------------------------------------------------------------------- Floating Principal Rate (b) Amount ($) (unaudited) -------------------------------------------------------------------------------------------------------- ASSET BACKED SECURITIES -- 1.3% CONSUMER SERVICES -- 0.1% Hotels, Resorts & Cruise Lines -- 0.1% 431,651 Westgate Resorts 2014-1 LLC, 5.5%, 12/20/26 (144A) $ 428,007 --------------- Total Consumer Services $ 428,007 -------------------------------------------------------------------------------------------------------- BANKS -- 1.2% Thrifts & Mortgage Finance -- 1.2% 800,000 Ascentium Equipment Receivables 2015-1 LLC, 5.92%, 6/12/23 (144A) $ 793,248 499,993 Axis Equipment Finance Receivables III LLC, 5.27%, 5/20/20 (144A) 479,324 165,041 Bayview Opportunity Master Fund IIa Trust 2014-20NPL, 3.721%, 8/28/44 (Step) (144A) 165,813 575,604 3.72 Bayview Opportunity Master Fund Trust 2014-15RPL, Floating Rate Note, 10/28/19 (144A) 573,858 47,335 Bear Stearns Asset Backed Securities Trust, 8.41%, 10/25/29 (Step) 47,697 61,857 7.78 GE Mortgage Services LLC, Floating Rate Note, 3/25/27 37,736 223,448 GLC Trust 2013-1, 3.0%, 7/15/21 (144A) 219,537 2,250,000 Green Tree Agency Advance Funding Trust I, 4.6692%, 10/15/48 (144A) 2,250,900 The accompanying notes are an integral part of these financial statements. 26 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/16 -------------------------------------------------------------------------------------------------------- Floating Principal Rate (b) Amount ($) (unaudited) Value -------------------------------------------------------------------------------------------------------- Thrifts & Mortgage Finance -- (continued) 750,000 Leaf Receivables Funding 10 LLC, 5.21%, 7/15/21 (144A) $ 745,485 500,000 Leaf Receivables Funding 11 LLC, 6.0%, 6/15/24 (144A) 463,579 250,000 Navitas Equipment Receivables LLC 2013-1, 5.82%, 6/15/19 (144A) 250,094 1,000,000 Navitas Equipment Receivables LLC 2015-1, 5.75%, 5/17/21 (144A) 968,842 600,000 4.99 NCF Dealer Floorplan Master Trust, Floating Rate Note, 10/20/20 (144A) 588,245 400,000 8.99 NCF Dealer Floorplan Master Trust, Floating Rate Note, 3/21/22 (144A) 395,095 73,771 RASC Series 2003-KS5 Trust, 4.46%, 7/25/33 (Step) 73,159 1,200,000 3.73 Silver Bay Realty 2014-1 Trust, Floating Rate Note, 9/18/31 (144A) 1,173,407 --------------- $ 9,226,019 --------------- Total Banks $ 9,226,019 -------------------------------------------------------------------------------------------------------- TOTAL ASSET BACKED SECURITIES (Cost $9,770,788) $ 9,654,026 -------------------------------------------------------------------------------------------------------- COLLATERALIZED MORTGAGE OBLIGATIONS -- 1.1% BANKS -- 1.1% Thrifts & Mortgage Finance -- 1.1% 100,000 A10 Securitization 2013-1 LLC, 4.7%, 11/17/25 (144A) $ 100,038 100,000 A10 Securitization 2013-1 LLC, 6.41%, 11/17/25 (144A) 100,050 92,919 5.21 Bear Stearns Commercial Mortgage Securities Trust 2005-PWR7, Floating Rate Note, 2/11/41 92,791 1,500,000 5.14 Bear Stearns Commercial Mortgage Securities Trust 2005-TOP20, Floating Rate Note, 10/12/42 1,485,977 10,714 5.88 CHL Mortgage Pass-Through Trust 2002-32, Floating Rate Note, 1/25/33 10,980 14,219 Credit Suisse First Boston Mortgage Securities Corp., 5.5%, 6/25/33 14,376 855,000 5.10 Credit Suisse First Boston Mortgage Securities Corp., Floating Rate Note, 8/15/38 865,760 331,167 Global Mortgage Securitization, Ltd., 5.25%, 11/25/32 (144A) 209,461 45,626 Global Mortgage Securitization, Ltd., 5.25%, 11/25/32 (144A) 35,978 46,102 Global Mortgage Securitization, Ltd., 5.25%, 11/25/32 (144A) 25,587 28,406 Global Mortgage Securitization, Ltd., 5.25%, 4/25/32 (144A) 18,818 The accompanying notes are an integral part of these financial statements. Pioneer Multi-Asset Income Fund | Annual Report | 7/31/16 27 Schedule of Investments | 7/31/16 (continued) -------------------------------------------------------------------------------------------------------- Floating Principal Rate (b) Amount ($) (unaudited) Value -------------------------------------------------------------------------------------------------------- Thrifts & Mortgage Finance -- (continued) 210,000 5.00 GMAT 2013-1 Trust, Floating Rate Note, 8/25/53 $ 199,940 675,000 4.38 GS Mortgage Securities Trust 2014-GSFL, Floating Rate Note, 7/15/31 (144A) 651,014 1,960,000 6.71 JP Morgan Chase Commercial Mortgage Securities Trust 2014-CBM MZ, Floating Rate Note, 10/15/19 (144A) 1,872,937 78,202 Merrill Lynch Mortgage Investors Trust Series 2006-AF1, 5.75%, 8/25/36 62,018 1,144,253 5.35 Merrill Lynch Mortgage Trust 2005-CKI1, Floating Rate Note, 11/12/37 1,118,125 250,000 5.58 Springleaf Mortgage Loan Trust 2013-1, Floating Rate Note, 6/25/58 (144A) 249,379 1,000,000 7.10 Velocity Commercial Capital Loan Trust 2015-1, Floating Rate Note, 6/25/45 (144A) 955,000 8,115 5.66 Wachovia Bank Commercial Mortgage Trust Series 2006-C24, Floating Rate Note, 3/15/45 8,106 --------------- $ 8,076,335 --------------- Total Banks $ 8,076,335 -------------------------------------------------------------------------------------------------------- GOVERNMENT -- 0.0%+ 11,647 6.20 Government National Mortgage Association REMICS, Floating Rate Note, 6/20/38 $ 459 --------------- Total Government $ 459 -------------------------------------------------------------------------------------------------------- TOTAL COLLATERALIZED MORTGAGE OBLIGATIONS (Cost $8,348,213) $ 8,076,794 -------------------------------------------------------------------------------------------------------- CORPORATE BONDS -- 33.1% ENERGY -- 5.6% Oil & Gas Drilling -- 0.0%+ 210,000 Drill Rigs Holdings, Inc., 6.5%, 10/1/17 (144A) $ 96,600 -------------------------------------------------------------------------------------------------------- Oil & Gas Equipment & Services -- 0.3% 700,000 Archrock Partners LP, 6.0%, 4/1/21 $ 645,750 1,395,000 8.15 FTS International, Inc., Floating Rate Note, 6/15/20 (144A) 1,129,349 860,000 McDermott International, Inc., 8.0%, 5/1/21 (144A) 765,400 --------------- $ 2,540,499 -------------------------------------------------------------------------------------------------------- Oil & Gas Exploration & Production -- 2.1% 2,195,000 Carrizo Oil & Gas, Inc., 6.25%, 4/15/23 $ 2,079,762 695,000 Denbury Resources, Inc., 4.625%, 7/15/23 430,900 600,000 Denbury Resources, Inc., 5.5%, 5/1/22 381,000 1,965,000 EP Energy LLC, 6.375%, 6/15/23 982,500 50,000 EPL Oil & Gas, Inc., 8.25%, 2/15/18 7,250 2,205,000 Gulfport Energy Corp., 7.75%, 11/1/20 2,260,125 929,000 Halcon Resources Corp., 12.0%, 2/15/22 (144A) 836,100 The accompanying notes are an integral part of these financial statements. 28 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/16 -------------------------------------------------------------------------------------------------------- Floating Principal Rate (b) Amount ($) (unaudited) Value -------------------------------------------------------------------------------------------------------- Oil & Gas Exploration & Production -- (continued) 1,293,000 Memorial Resource Development Corp., 5.875%, 7/1/22 $ 1,293,272 1,355,000 Oasis Petroleum, Inc., 7.25%, 2/1/19 1,270,312 1,070,000 Parsley Energy LLC, 7.5%, 2/15/22 (144A) 1,096,750 785,000 Rice Energy Inc., 6.25%, 5/1/22 765,375 2,330,000 Sanchez Energy Corp., 6.125%, 1/15/23 1,566,925 1,245,000 Whiting Petroleum Corp., 5.75%, 3/15/21 1,042,688 1,300,000 WPX Energy, Inc., 7.5%, 8/1/20 1,280,500 470,000 WPX Energy, Inc., 8.25%, 8/1/23 460,891 --------------- $ 15,754,350 -------------------------------------------------------------------------------------------------------- Oil & Gas Refining & Marketing -- 0.7% 3,550,000 Calumet Specialty Products Partners LP, 6.5%, 4/15/21 $ 2,600,375 170,000 Calumet Specialty Products Partners LP, 7. 625%, 1/15/22 123,038 1,275,000 Calumet Specialty Products Partners LP, 7.75%, 4/15/23 922,781 458,000 EnLink Midstream Partners LP, 5.05%, 4/1/45 382,149 1,328,000 EnLink Midstream Partners LP, 5.6%, 4/1/44 1,224,364 --------------- $ 5,252,707 -------------------------------------------------------------------------------------------------------- Oil & Gas Storage & Transportation -- 2.3% 850,000 Blue Racer Midstream LLC, 6.125%, 11/15/22 (144A) $ 799,000 300,000 5.85 DCP Midstream LLC, Floating Rate Note, 5/21/43 (144A) 226,500 1,655,000 Global Partners LP, 6.25%, 7/15/22 1,415,025 2,070,000 Global Partners LP, 7.0%, 6/15/23 1,754,325 100,000 Kinder Morgan Energy Partners LP, 5.0%, 8/15/42 95,427 650,000 ONEOK, Inc., 7.5%, 9/1/23 711,750 690,000 PBF Logistics LP, 6.875%, 5/15/23 690,000 690,000 Sabine Pass Liquefaction LLC, 5.625%, 3/1/25 704,449 1,365,000 Sabine Pass Liquefaction LLC, 5.75%, 5/15/24 1,399,125 745,000 Sabine Pass Liquefaction LLC, 5.875%, 6/30/26 (144A) 764,556 2,225,000 Sunoco LP, 6.375%, 4/1/23 (144A) 2,263,938 1,000,000 Targa Resources Partners LP, 4.125%, 11/15/19 996,250 1,750,000 Targa Resources Partners LP, 6.75%, 3/15/24 (144A) 1,824,375 3,000,000 The Williams Companies, Inc., 7.5%, 1/15/31 3,225,000 --------------- $ 16,869,720 -------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Multi-Asset Income Fund | Annual Report | 7/31/16 29 Schedule of Investments | 7/31/16 (continued) -------------------------------------------------------------------------------------------------------- Floating Principal Rate (b) Amount ($) (unaudited) Value -------------------------------------------------------------------------------------------------------- Coal & Consumable Fuels -- 0.2% 950,000 Alpha Natural Resources, Inc., 6.0%, 6/1/19 (d) $ 3,562 1,460,000 SunCoke Energy Partners LP, 7.375%, 2/1/20 1,241,000 --------------- $ 1,244,562 --------------- Total Energy $ 41,758,438 -------------------------------------------------------------------------------------------------------- MATERIALS -- 3.1% Commodity Chemicals -- 0.7% 680,000 Hexion, Inc., 6.625%, 4/15/20 $ 574,600 2,375,000 Rain CII Carbon LLC, 8.25%, 1/15/21 (144A) 1,983,125 700,000 Tronox Finance LLC, 6.375%, 8/15/20 567,000 2,535,000 Tronox Finance LLC, 7.5%, 3/15/22 (144A) 2,012,156 --------------- $ 5,136,881 -------------------------------------------------------------------------------------------------------- Diversified Chemicals -- 0.1% 760,000 CVR Partners LP, 9.25%, 6/15/23 (144A) $ 777,100 -------------------------------------------------------------------------------------------------------- Specialty Chemicals -- 0.3% 1,695,000 A Schulman, Inc., 6.875%, 6/1/23 (144A) $ 1,720,425 610,000 Platform Specialty Products Corp., 10.375%, 5/1/21 (144A) 613,050 --------------- $ 2,333,475 -------------------------------------------------------------------------------------------------------- Metal & Glass Containers -- 0.7% 1,421,756 Ardagh Finance Holdings SA, 8.625%, (0.00% Cash, 8.625% PIK) 6/15/19 (144A) (PIK) $ 1,464,409 1,000,000 Ardagh Packaging Finance Plc, 6.75%, 1/31/21 (144A) 1,028,800 2,800,000 Coveris Holdings SA, 7.875%, 11/1/19 (144A) 2,814,000 --------------- $ 5,307,209 -------------------------------------------------------------------------------------------------------- Paper Packaging -- 0.4% 200,000 Coveris Holding Corp., 10.0%, 6/1/18 (144A) $ 205,720 2,350,000 Sealed Air Corp., 6.875%, 7/15/33 (144A) 2,491,000 --------------- $ 2,696,720 -------------------------------------------------------------------------------------------------------- Aluminum -- 0.1% 1,000,000 Novelis, Inc., 8.375%, 12/15/17 $ 1,021,250 -------------------------------------------------------------------------------------------------------- Diversified Metals & Mining -- 0.4% 465,000 Ausdrill Finance Pty, Ltd., 6.875%, 11/1/19 (144A) $ 427,800 1,285,000 FMG Resources August 2006 Pty, Ltd., 9.75%, 3/1/22 (144A) 1,439,200 1,200,000 IAMGOLD Corp., 6.75%, 10/1/20 (144A) 1,122,000 --------------- $ 2,989,000 -------------------------------------------------------------------------------------------------------- Forest Products -- 0.1% 1,460,000 Millar Western Forest Products, Ltd., 8.5%, 4/1/21 $ 708,100 -------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 30 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/16 -------------------------------------------------------------------------------------------------------- Floating Principal Rate (b) Amount ($) (unaudited) Value -------------------------------------------------------------------------------------------------------- Paper Products -- 0.3% 435,000 Appvion, Inc., 9.0%, 6/1/20 (144A) $ 261,000 2,155,000 Resolute Forest Products, Inc., 5.875%, 5/15/23 1,767,100 --------------- $ 2,028,100 --------------- Total Materials $ 22,997,835 -------------------------------------------------------------------------------------------------------- CAPITAL GOODS -- 1.9% Aerospace & Defense -- 0.7% 1,715,000 DigitalGlobe, Inc., 5.25%, 2/1/21 (144A) $ 1,659,262 1,693,544 DynCorp International, Inc., 11.875%, 11/30/20 (PIK) 1,287,093 1,615,000 LMI Aerospace, Inc., 7.375%, 7/15/19 1,643,262 550,000 Triumph Group, Inc., 5.25%, 6/1/22 523,875 --------------- $ 5,113,492 -------------------------------------------------------------------------------------------------------- Building Products -- 0.2% 1,755,000 Griffon Corp., 5.25%, 3/1/22 $ 1,757,194 -------------------------------------------------------------------------------------------------------- Construction & Engineering -- 0.2% 1,685,000 MasTec, Inc., 4.875%, 3/15/23 $ 1,613,388 -------------------------------------------------------------------------------------------------------- Electrical Components & Equipment -- 0.2% 2,090,000 General Cable Corp., 5.75%, 10/1/22 $ 1,964,600 -------------------------------------------------------------------------------------------------------- Construction & Farm Machinery & Heavy Trucks -- 0.3% 330,000 Commercial Vehicle Group, Inc., 7.875%, 4/15/19 $ 322,575 1,315,000 Meritor, Inc., 6.25%, 2/15/24 1,157,200 555,000 Titan International, Inc., 6.875%, 10/1/20 511,988 --------------- $ 1,991,763 -------------------------------------------------------------------------------------------------------- Industrial Machinery -- 0.3% 2,250,000 Apex Tool Group LLC, 7.0%, 2/1/21 (144A) $ 2,019,375 69,714 Liberty Tire Recycling LLC, 11.0%, 3/31/21 (0.0% cash, 11.0% PIK) (144A) (PIK) (c) 51,588 --------------- $ 2,070,963 -------------------------------------------------------------------------------------------------------- Trading Companies & Distributors -- 0.0%+ 24,000 TRAC Intermodal LLC, 11.0%, 8/15/19 $ 25,320 --------------- Total Capital Goods $ 14,536,720 -------------------------------------------------------------------------------------------------------- COMMERCIAL SERVICES & SUPPLIES -- 1.2% Commercial Printing -- 0.4% 3,455,000 Cenveo Corp., 6.0%, 8/1/19 (144A) $ 3,005,850 -------------------------------------------------------------------------------------------------------- Environmental & Facilities Services -- 0.0%+ 500,000 Safway Group Holding LLC, 7.0%, 5/15/18 (144A) $ 509,375 -------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Multi-Asset Income Fund | Annual Report | 7/31/16 31 Schedule of Investments | 7/31/16 (continued) -------------------------------------------------------------------------------------------------------- Floating Principal Rate (b) Amount ($) (unaudited) Value -------------------------------------------------------------------------------------------------------- Diversified Support Services -- 0.5% 2,580,000 NANA Development Corp., 9.5%, 3/15/19 (144A) $ 2,283,300 2,005,000 TMS International Corp., 7.625%, 10/15/21 (144A) 1,443,600 --------------- $ 3,726,900 -------------------------------------------------------------------------------------------------------- Research & Consulting Services -- 0.3% 2,065,000 CEB, Inc., 5.625%, 6/15/23 (144A) $ 2,090,812 --------------- Total Commercial Services & Supplies $ 9,332,937 -------------------------------------------------------------------------------------------------------- TRANSPORTATION -- 1.0% Air Freight & Logistics -- 0.2% 1,375,000 XPO Logistics, Inc., 7.875%, 9/1/19 (144A) $ 1,426,562 -------------------------------------------------------------------------------------------------------- Airlines -- 0.4% 2,960,000 Intrepid Aviation Group Holdings LLC, 6.875%, 2/15/19 (144A) $ 2,671,400 135,999 US Airways 2013-1 Class B Pass Through Trust, 5.375%, 11/15/21 139,059 --------------- $ 2,810,459 -------------------------------------------------------------------------------------------------------- Railroads -- 0.3% 1,015,000 Florida East Coast Holdings Corp., 6.75%, 5/1/19 (144A) $ 1,040,375 1,330,000 Florida East Coast Holdings Corp., 9.75%, 5/1/20 (144A) 1,177,050 --------------- $ 2,217,425 -------------------------------------------------------------------------------------------------------- Trucking -- 0.1% 1,485,000 Jack Cooper Holdings Corp., 9.25%, 6/1/20 $ 1,069,200 -------------------------------------------------------------------------------------------------------- Airport Services -- 0.0%+ 110,880 Aeropuertos Argentina 2000 SA, 10.75%, 12/1/20 (144A) $ 121,829 --------------- Total Transportation $ 7,645,475 -------------------------------------------------------------------------------------------------------- CONSUMER DURABLES & APPAREL -- 1.3% Homebuilding -- 1.0% 4,305,000 KB Home, 7.625%, 5/15/23 $ 4,498,725 50,000 KB Home, Inc., 8.0%, 3/15/20 55,250 950,000 Rialto Holdings LLC, 7.0%, 12/1/18 (144A) 969,570 1,840,000 Taylor Morrison Communities, Inc., 5.875%, 4/15/23 (144A) 1,895,200 --------------- $ 7,418,745 -------------------------------------------------------------------------------------------------------- Textiles -- 0.3% 2,445,000 Springs Industries, Inc., 6.25%, 6/1/21 $ 2,530,575 --------------- Total Consumer Durables & Apparel $ 9,949,320 -------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 32 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/16 -------------------------------------------------------------------------------------------------------- Floating Principal Rate (b) Amount ($) (unaudited) Value -------------------------------------------------------------------------------------------------------- CONSUMER SERVICES -- 1.5% Casinos & Gaming -- 0.5% 2,049,000 Scientific Games International, Inc., 10.0%, 12/1/22 $ 1,821,049 3,125,000 Scientific Games International, Inc., 6.25%, 9/1/20 2,125,000 --------------- $ 3,946,049 -------------------------------------------------------------------------------------------------------- Specialized Consumer Services -- 1.0% 3,750,000 Constellis Holdings LLC, 9.75%, 5/15/20 (144A) $ 3,656,250 1,500,000 Prime Security Services Borrower LLC, 9.25%, 5/15/23 (144A) 1,601,250 1,045,000 Sotheby's, 5.25%, 10/1/22 (144A) 992,750 855,000 StoneMor Partners LP, 7.875%, 6/1/21 852,862 --------------- $ 7,103,112 --------------- Total Consumer Services $ 11,049,161 -------------------------------------------------------------------------------------------------------- MEDIA -- 1.5% Advertising -- 0.2% 1,345,000 MDC Partners, Inc., 6.5%, 5/1/24 (144A) $ 1,301,288 -------------------------------------------------------------------------------------------------------- Broadcasting -- 0.5% 2,295,000 CCO Holdings LLC, 5.5%, 5/1/26 (144A) $ 2,395,406 1,505,000 Gannett Co., Inc., 6.375%, 10/15/23 1,617,875 --------------- $ 4,013,281 -------------------------------------------------------------------------------------------------------- Cable & Satellite -- 0.5% 1,720,000 DISH DBS Corp., 5.875%, 11/15/24 $ 1,659,800 840,000 DISH DBS Corp., 7.75%, 7/1/26 (144A) 870,975 1,220,000 Neptune Finco Corp., 6.625%, 10/15/25 (144A) 1,314,550 --------------- $ 3,845,325 -------------------------------------------------------------------------------------------------------- Movies & Entertainment -- 0.2% 1,000,000 Regal Entertainment Group, Inc., 5.75%, 2/1/25 $ 1,012,500 2,650,000 SFX Entertainment, Inc., 9.625%, 2/1/19 (144A) (d) 26,500 --------------- $ 1,039,000 -------------------------------------------------------------------------------------------------------- Publishing -- 0.1% 750,000 Trader Corp., 9.875%, 8/15/18 (144A) $ 767,812 --------------- Total Media $ 10,966,706 -------------------------------------------------------------------------------------------------------- RETAILING -- 0.9% Department Stores -- 0.1% 720,000 Argos Merger Sub, Inc., 7.125%, 3/15/23 (144A) $ 752,400 -------------------------------------------------------------------------------------------------------- Computer & Electronics Retail -- 0.2% 1,985,000 Rent-A-Center, Inc., 4.75%, 5/1/21 $ 1,667,400 -------------------------------------------------------------------------------------------------------- Specialty Stores -- 0.1% 250,000 Radio Systems Corp., 8.375%, 11/1/19 (144A) $ 262,812 -------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Multi-Asset Income Fund | Annual Report | 7/31/16 33 Schedule of Investments | 7/31/16 (continued) -------------------------------------------------------------------------------------------------------- Floating Principal Rate (b) Amount ($) (unaudited) Value -------------------------------------------------------------------------------------------------------- Automotive Retail -- 0.5% 4,130,000 DriveTime Automotive Group, Inc., 8.0%, 6/1/21 (144A) $ 3,923,500 --------------- Total Retailing $ 6,606,112 -------------------------------------------------------------------------------------------------------- FOOD, BEVERAGE & TOBACCO -- 1.2% Agricultural Products -- 0.0%+ 550,000 Tonon Luxembourg SA, 10.5%, 5/14/24 (144A) (d) $ 225,500 -------------------------------------------------------------------------------------------------------- Packaged Foods & Meats -- 0.8% 1,210,000 Dole Food Co., Inc., 7.25%, 5/1/19 (144A) $ 1,219,075 1,350,000 Pilgrim's Pride Corp., 5.75%, 3/15/25 (144A) 1,366,875 1,775,000 Post Holdings, Inc., 6.0%, 12/15/22 (144A) 1,872,625 1,375,000 Post Holdings, Inc., 6.75%, 12/1/21 (144A) 1,467,812 --------------- $ 5,926,387 -------------------------------------------------------------------------------------------------------- Tobacco -- 0.4% 2,960,000 Alliance One International, Inc., 9.875%, 7/15/21 $ 2,604,800 --------------- Total Food, Beverage & Tobacco $ 8,756,687 -------------------------------------------------------------------------------------------------------- HOUSEHOLD & PERSONAL PRODUCTS -- 0.2% Personal Products -- 0.2% 1,400,000 Revlon Consumer Products Corp., 5.75%, 2/15/21 $ 1,421,000 --------------- Total Household & Personal Products $ 1,421,000 -------------------------------------------------------------------------------------------------------- HEALTH CARE EQUIPMENT & SERVICES -- 1.9% Health Care Services -- 0.3% 1,555,000 BioScrip, Inc., 8.875%, 2/15/21 $ 1,434,488 1,200,000 RegionalCare Hospital Partners Holdings, Inc., 8.25%, 5/1/23 (144A) 1,249,488 --------------- $ 2,683,976 -------------------------------------------------------------------------------------------------------- Health Care Facilities -- 1.3% 2,040,000 CHS, 6.875%, 2/1/22 $ 1,754,400 1,065,000 CHS, Inc., 8.0%, 11/15/19 1,023,731 3,175,000 Kindred Healthcare Inc., 6.375%, 4/15/22 2,928,938 430,000 Kindred Healthcare, Inc., 8.0%, 1/15/20 439,675 1,485,000 Quorum Health Corp., 11.625%, 4/15/23 (144A) 1,507,275 2,085,000 Universal Hospital Services, Inc., 7.625%, 8/15/20 1,939,050 --------------- $ 9,593,069 -------------------------------------------------------------------------------------------------------- Managed Health Care -- 0.3% 1,105,000 Centene Corp., 5.625%, 2/15/21 $ 1,167,156 960,000 Centene Corp., 6.125%, 2/15/24 1,031,405 --------------- $ 2,198,561 --------------- Total Health Care Equipment & Services $ 14,475,606 -------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 34 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/16 -------------------------------------------------------------------------------------------------------- Floating Principal Rate (b) Amount ($) (unaudited) Value -------------------------------------------------------------------------------------------------------- PHARMACEUTICALS, BIOTECHNOLOGY & LIFE SCIENCES -- 0.6% Pharmaceuticals -- 0.6% 2,885,000 Endo, Ltd., 6.0%, 7/15/23 (144A) $ 2,515,374 2,555,000 Valeant Pharmaceuticals International, Inc., 5.875%, 5/15/23 (144A) 2,127,038 --------------- $ 4,642,412 --------------- Total Pharmaceuticals, Biotechnology & Life Sciences $ 4,642,412 -------------------------------------------------------------------------------------------------------- BANKS -- 1.4% Diversified Banks -- 0.9% 945,000 6.50 Bank of America Corp., Floating Rate Note, 10/23/49 $ 1,031,822 1,885,000 8.12 Credit Agricole SA, Floating Rate Note, 12/31/49 (Perpetual) (144A) 1,983,962 1,150,000 8.00 Royal Bank of Scotland Group Plc, Floating Rate Note, 12/31/49 (Perpetual) 1,142,812 2,350,000 7.50 Royal Bank of Scotland Group Plc, Floating Rate Note, 12/31/49 (Perpetual) 2,281,850 --------------- $ 6,440,446 -------------------------------------------------------------------------------------------------------- Thrifts & Mortgage Finance -- 0.5% 4,125,000 Provident Funding Associates LP, 6.75%, 6/15/21 (144A) $ 3,939,375 --------------- Total Banks $ 10,379,821 -------------------------------------------------------------------------------------------------------- DIVERSIFIED FINANCIALS -- 1.4% Other Diversified Financial Services -- 0.1% 265,000 6.75 JPMorgan Chase & Co., Floating Rate Note, 8/29/49 $ 298,430 -------------------------------------------------------------------------------------------------------- Specialized Finance -- 0.7% 1,195,000 MSCI, Inc., 5.75%, 8/15/25 (144A) $ 1,301,594 1,995,000 Nationstar Mortgage LLC, 6.5%, 6/1/22 1,675,800 1,915,000 Nationstar Mortgage LLC, 6.5%, 7/1/21 1,646,900 455,000 Nationstar Mortgage LLC, 6.5%, 8/1/18 436,800 450,000 Oxford Finance LLC, 7.25%, 1/15/18 (144A) 451,125 --------------- $ 5,512,219 -------------------------------------------------------------------------------------------------------- Consumer Finance -- 0.3% 1,290,000 Navient Corp., 6.625%, 7/26/21 $ 1,302,900 1,290,000 TMX Finance LLC, 8.5%, 9/15/18 (144A) 1,012,650 --------------- $ 2,315,550 -------------------------------------------------------------------------------------------------------- Diversified Capital Markets -- 0.3% 2,210,000 Quicken Loans, Inc., 5.75%, 5/1/25 (144A) $ 2,190,662 --------------- Total Diversified Financials $ 10,316,861 -------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Multi-Asset Income Fund | Annual Report | 7/31/16 35 Schedule of Investments | 7/31/16 (continued) -------------------------------------------------------------------------------------------------------- Floating Principal Rate (b) Amount ($) (unaudited) Value -------------------------------------------------------------------------------------------------------- INSURANCE -- 0.6% Reinsurance -- 0.6% 1,000,000 Arlington Segregated Account (Kane SAC Ltd.), Variable Rate Notes, 8/31/16 (f)(g) $ 48,600 900,000 Berwick 2016-1 Segregated Account (Kane SAC Ltd.), Variable Rate Notes, 2/1/18 (f)(g) 926,820 700,000 Carnosutie 2016-N,Segregated Account (Kane SAC Ltd.), Variable Rate Notes, 11/30/20 (f)(g) 724,640 700,000 Carnoustie Segregated Account (Kane SAC Ltd.), Variable Rate Notes, 2/19/16 (f)(g) 14,280 1,000,000 Lorenz Re, Ltd., Variable Rate Notes, 3/31/18 (f)(g) 70,000 1,200,000 Pangaea Re, Series 2015-1, Principal at Risk Notes, 2/1/19 (f)(g) 47,040 2,000,000 Pangaea Re, Series 2015-2, Principal at Risk Notes, 11/30/19 (f)(g) 208,800 1,200,000 Pangaea Re., Variable Rate Notes, 2/1/20 (f)(g) 1,228,440 1,050,000 Pangaea Re., Variable Rate Notes, 7/1/18 (f)(g) 18,900 3,333 Sector Re V, Ltd., Variable Rate Notes, 3/1/20 (144A) (f)(g) 107,418 700,000 Silverton Re, Ltd., Variable Rate Notes, 9/18/17 (144A) (f)(g) 17,290 1,000,000 Versutus 2016, Class A-1, Variable Rate Notes, 11/30/20 (f)(g) 1,001,500 800,000 Versutus Ltd., Series 2015-A, Variable Rate Notes, 12/31/2017 (f)(g) 11,680 --------------- $ 4,425,408 --------------- Total Insurance $ 4,425,408 -------------------------------------------------------------------------------------------------------- REAL ESTATE -- 1.0% Diversified REIT -- 0.1% 1,130,000 MPT Operating Partnership LP, 5.5%, 5/1/24 $ 1,169,550 -------------------------------------------------------------------------------------------------------- Specialized REIT -- 0.5% 1,105,381 AAF Holdings LLC, 12.0%, 7/1/19 (144A) (12.0% cash, 0.0% PIK) (PIK) $ 1,133,016 2,500,000 Communications Sales & Leasing, Inc., 6.0%, 4/15/23 (144A) 2,579,700 --------------- $ 3,712,716 -------------------------------------------------------------------------------------------------------- Diversified Real Estate Activities -- 0.2% 1,260,000 Alam Synergy Pte, Ltd., 9.0%, 1/29/19 (144A) $ 1,326,150 -------------------------------------------------------------------------------------------------------- Real Estate Services -- 0.2% 1,210,000 Kennedy-Wilson, Inc., 5.875%, 4/1/24 $ 1,222,100 --------------- Total Real Estate $ 7,430,516 -------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 36 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/16 -------------------------------------------------------------------------------------------------------- Floating Principal Rate (b) Amount ($) (unaudited) Value -------------------------------------------------------------------------------------------------------- SOFTWARE & SERVICES -- 0.7% Internet Software & Services -- 0.2% 1,000,000 Cimpress NV, 7.0%, 4/1/22 (144A) $ 1,020,000 325,000 j2 Cloud Services, Inc., 8.0%, 8/1/20 339,424 --------------- $ 1,359,424 -------------------------------------------------------------------------------------------------------- IT Consulting & Other Services -- 0.1% 550,000 Diamond 1 Finance Corp., 5.875%, 6/15/21 (144A) $ 574,748 500,000 Diamond 1 Finance Corp., 7.125%, 6/15/24 (144A) 537,986 --------------- $ 1,112,734 -------------------------------------------------------------------------------------------------------- Data Processing & Outsourced Services -- 0.4% 540,000 First Data Corp., 5.75%, 1/15/24 (144A) $ 542,689 1,340,000 First Data Corp., 7.0%, 12/1/23 (144A) 1,378,525 1,145,000 NeuStar, Inc., 4.5%, 1/15/23 1,011,894 --------------- $ 2,933,108 --------------- Total Software & Services $ 5,405,266 -------------------------------------------------------------------------------------------------------- TECHNOLOGY HARDWARE & EQUIPMENT -- 0.5% Computer Hardware Storage & Peripherals -- 0.5% 1,885,000 Diebold, Inc., 8.5%, 4/15/24 (144A) $ 1,887,356 1,540,000 NCR Corp., 6.375%, 12/15/23 1,593,900 --------------- $ 3,481,256 --------------- Total Technology Hardware & Equipment $ 3,481,256 -------------------------------------------------------------------------------------------------------- SEMICONDUCTORS & SEMICONDUCTOR EQUIPMENT -- 0.4% Semiconductor Equipment -- 0.3% 2,100,000 Entegris, Inc., 6.0%, 4/1/22 (144A) $ 2,163,000 -------------------------------------------------------------------------------------------------------- Semiconductors -- 0.1% 1,225,000 Micron Technology, Inc., 5.5%, 2/1/25 $ 1,099,438 --------------- Total Semiconductors & Semiconductor Equipment $ 3,262,438 -------------------------------------------------------------------------------------------------------- TELECOMMUNICATION SERVICES -- 3.6% Integrated Telecommunication Services -- 2.3% 700,000 CenturyLink, Inc., 6.45%, 6/15/21 $ 747,250 1,325,000 CenturyLink, Inc., 6.75%, 12/1/23 1,378,000 450,000 CenturyLink, Inc., 7.6%, 9/15/39 402,750 1,920,000 Frontier Communications Corp., 11.0%, 9/15/25 2,049,600 4,200,000 Frontier Communications Corp., 7.125%, 1/15/23 3,895,500 160,000 Frontier Communications Corp., 8.75%, 4/15/22 165,600 800,000 Frontier Communications Corp., 9.25%, 7/1/21 870,592 1,200,000 GCI, Inc., 6.75%, 6/1/21 1,236,000 3,000,000 GCI, Inc., 6.875%, 4/15/25 3,112,500 The accompanying notes are an integral part of these financial statements. Pioneer Multi-Asset Income Fund | Annual Report | 7/31/16 37 Schedule of Investments | 7/31/16 (continued) -------------------------------------------------------------------------------------------------------- Floating Principal Rate (b) Amount ($) (unaudited) Value -------------------------------------------------------------------------------------------------------- Integrated Telecommunication Services -- (continued) 770,000 Windstream Corp., 7.5%, 6/1/22 $ 708,400 2,680,000 Windstream Services LLC, 6.375%, 8/1/23 2,318,200 590,000 Windstream Services LLC, 7.75%, 10/1/21 560,500 --------------- $ 17,444,892 -------------------------------------------------------------------------------------------------------- Wireless Telecommunication Services -- 1.3% 200,000 Altice Finco SA, 8.125%, 1/15/24 (144A) $ 202,500 5,555,000 Sprint Corp., 7.125%, 6/15/24 4,909,509 2,000,000 Sprint Corp., 7.25%, 9/15/21 1,866,260 2,000,000 T-Mobile USA, Inc., 6.625%, 4/1/23 2,146,600 100,000 Unison Ground Lease Funding LLC, 5.78%, 3/16/43 (144A) 98,105 100,000 WCP Issuer LLC, 6.657%, 8/15/20 (144A) 103,316 --------------- $ 9,326,290 --------------- Total Telecommunication Services $ 26,771,182 -------------------------------------------------------------------------------------------------------- UTILITIES -- 1.6% Electric Utilities -- 0.9% 2,765,000 Talen Energy Supply LLC, 4.625%, 7/15/19 (144A) $ 2,619,838 1,740,000 Talen Energy Supply LLC, 6.5%, 6/1/25 1,531,200 2,415,000 TerraForm Power, 9.75%, 8/15/22 (144A) 2,421,038 --------------- $ 6,572,076 -------------------------------------------------------------------------------------------------------- Gas Utilities -- 0.5% 895,000 DCP Midstream Operating LP, 5.6%, 4/1/44 $ 814,450 625,000 Ferrellgas LP, 6.5%, 5/1/21 568,750 2,305,000 Ferrellgas LP, 6.75%, 1/15/22 2,086,025 --------------- $ 3,469,225 -------------------------------------------------------------------------------------------------------- Independent Power Producers & Energy Traders -- 0.2% 965,000 NRG Energy, Inc., 7.25%, 5/15/26 (144A) $ 990,331 825,000 TerraForm Power Operating LLC, 6.125%, 6/15/25 (144A) 820,875 --------------- $ 1,811,206 --------------- Total Utilities $ 11,852,507 -------------------------------------------------------------------------------------------------------- TOTAL CORPORATE BONDS (Cost $261,465,741) $ 247,463,664 -------------------------------------------------------------------------------------------------------- FOREIGN GOVERNMENT BONDS -- 5.9% IDR 56,876,000,000 Indonesia Treasury Bond, 7.875%, 4/15/19 $ 4,476,997 IDR 46,591,000,000 Indonesia Treasury Bond, 8.25%, 7/15/21 3,786,020 IDR 128,202,000,000 Indonesia Treasury Bond, 8.375%, 3/15/24 10,619,473 IDR 135,330,000,000 Indonesia Treasury Bond, 8.75%, 5/15/31 11,758,052 The accompanying notes are an integral part of these financial statements. 38 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/16 -------------------------------------------------------------------------------------------------------- Floating Principal Rate (b) Amount ($) (unaudited) Value -------------------------------------------------------------------------------------------------------- FOREIGN GOVERNMENT BONDS -- (continued) IDR 76,164,000,000 Indonesia Treasury Bond, 9.0%, 3/15/29 $ 6,657,845 MXN 69,745,500 Mexican Bonos, 10.0%, 12/5/24 4,731,610 PHP 76,000,000 Philippine Government International Bond, 6.25%, 1/14/36 1,884,495 --------------- $ 43,914,492 -------------------------------------------------------------------------------------------------------- TOTAL FOREIGN GOVERNMENT BONDS (Cost $40,800,422) $ 43,914,492 -------------------------------------------------------------------------------------------------------- SENIOR FLOATING RATE LOAN INTERESTS -- 1.4%** MATERIALS -- 0.5% Diversified Metals & Mining -- 0.2% 1,611,565 4.25 Fortescue Metals Group, Ltd., Bank Loan, 6/30/19 $ 1,581,725 -------------------------------------------------------------------------------------------------------- Steel -- 0.3% 2,335,000 6.00 Zekelman Industries, Inc., Term Loan, 6/8/21 $ 2,349,594 --------------- Total Materials $ 3,931,319 -------------------------------------------------------------------------------------------------------- CAPITAL GOODS -- 0.2% Aerospace & Defense -- 0.2% 1,625,000 4.65 DynCorp International, Inc., Term Loan B2, 7/7/20 $ 1,623,138 -------------------------------------------------------------------------------------------------------- Electrical Components & Equipment -- 0.0%+ 223,353 5.25 Pelican Products, Inc., Term Loan (First Lien), 4/8/20 $ 220,003 -------------------------------------------------------------------------------------------------------- Industrial Conglomerates -- 0.0%+ 50,532 8.25 Filtration Group Corp., Initial Term Loan (Second Lien), 11/15/21 $ 49,985 --------------- Total Capital Goods $ 1,893,126 -------------------------------------------------------------------------------------------------------- COMMERCIAL SERVICES & SUPPLIES -- 0.0%+ Security & Alarm Services -- 0.0%+ 26,232 4.25 Monitronics International, Inc., Term B Loan, 3/23/18 $ 26,073 --------------- Total Commercial Services & Supplies $ 26,073 -------------------------------------------------------------------------------------------------------- CONSUMER DURABLES & APPAREL -- 0.0%+ Leisure Products -- 0.0%+ 62,045 3.75 BRP US, Inc., Term B Loan, 6/30/23 $ 61,942 --------------- Total Consumer Durables & Apparel $ 61,942 -------------------------------------------------------------------------------------------------------- CONSUMER SERVICES -- 0.1% Education Services -- 0.1% 875,000 5.00 McGraw-Hill Global Education Holdings LLC, Term B Loan (First Lien), 5/2/22 $ 880,688 --------------- Total Consumer Services $ 880,688 -------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Multi-Asset Income Fund | Annual Report | 7/31/16 39 Schedule of Investments | 7/31/16 (continued) -------------------------------------------------------------------------------------------------------- Floating Principal Rate (b) Amount ($) (unaudited) Value -------------------------------------------------------------------------------------------------------- MEDIA -- 0.0%+ Broadcasting -- 0.0%+ 57,983 4.00 Univision Communications, Inc., Replacement First-Lien Term Loan (C-4), 3/1/20 $ 58,037 --------------- Total Media $ 58,037 -------------------------------------------------------------------------------------------------------- FOOD & STAPLES RETAILING -- 0.1% Food Distributors -- 0.1% 700,000 8.25 Del Monte Foods Consumer Products, Term Loan (Second Lien), 5/26/21 $ 508,667 --------------- Total Food & Staples Retailing $ 508,667 -------------------------------------------------------------------------------------------------------- HEALTH CARE EQUIPMENT & SERVICES -- 0.1% Health Care Services -- 0.0%+ 67,327 6.50 Ardent Legacy Acquisitions, Inc., Term Loan, 7/31/21 $ 67,580 86,593 6.50 BioScrip, Inc., Initial Term B Loan, 7/31/20 82,913 43,296 6.50 BioScrip, Inc., Term Loan, 7/31/20 41,456 --------------- $ 191,949 -------------------------------------------------------------------------------------------------------- Health Care Facilities -- 0.1% 450,000 4.25 Kindred Healthcare, Inc., Tranche B Loan (First Lien), 4/10/21 $ 448,500 --------------- Total Health Care Equipment & Services $ 640,449 -------------------------------------------------------------------------------------------------------- PHARMACEUTICALS, BIOTECHNOLOGY & LIFE SCIENCES -- 0.0%+ Biotechnology -- 0.0%+ 119,657 7.00 Lantheus Medical Imaging, Inc., Initial Term Loan, 6/25/22 $ 108,888 --------------- Total Pharmaceuticals, Biotechnology & Life Sciences $ 108,888 -------------------------------------------------------------------------------------------------------- BANKS -- 0.0%+ Thrifts & Mortgage Finance -- 0.0%+ 38,817 5.50 Ocwen Financial Corp., Initial Term Loan, 1/15/18 $ 38,332 --------------- Total Banks $ 38,332 -------------------------------------------------------------------------------------------------------- DIVERSIFIED FINANCIALS -- 0.3% Investment Banking & Brokerage -- 0.3% 2,025,000 8.63 Concentra, Inc., Initial Term Loan (Second Lien), 4/8/23 $ 1,985,108 --------------- Total Diversified Financials $ 1,985,108 -------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 40 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/16 -------------------------------------------------------------------------------------------------------- Floating Principal Rate (b) Amount ($) (unaudited) Value -------------------------------------------------------------------------------------------------------- SOFTWARE & SERVICES -- 0.1% IT Consulting & Other Services -- 0.1% 735,000 5.75 Evergreen Skills Lux Sarl, Initial Term Loan (First Lien), 4/23/21 $ 605,456 --------------- Total Software & Services $ 605,456 -------------------------------------------------------------------------------------------------------- TOTAL SENIOR FLOATING RATE LOAN INTERESTS (Cost $10,579,155) $ 10,738,085 -------------------------------------------------------------------------------------------------------- -------------------------------------------------------------------------------------------------------- Shares -------------------------------------------------------------------------------------------------------- EQUITY LINKED NOTE -- 1.3% TECHNOLOGY HARDWARE & EQUIPMENT -- 1.3% Computer Storage & Peripherals -- 1.3% 99,920 1.00 Apple, Inc., 8/2/16 $ 9,962,024 -------------------------------------------------------------------------------------------------------- TOTAL EQUITY LINKED NOTE (Cost $10,000,593) $ 9,962,024 -------------------------------------------------------------------------------------------------------- EXCHANGE TRADED FUNDS -- 0.4% DIVERSIFIED FINANCIALS -- 0.4% Asset Management & Custody Banks -- 0.4% 138,219 BlackRock MuniVest Fund, Inc. $ 1,524,556 94,301 BlackRock MuniYield Fund, Inc. 1,512,588 --------------- $ 3,037,144 --------------- Total Diversified Financials $ 3,037,144 -------------------------------------------------------------------------------------------------------- TOTAL EXCHANGE TRADED FUNDS (Cost $2,557,184) $ 3,037,144 -------------------------------------------------------------------------------------------------------- MUTUAL FUND -- 0.5% DIVERSIFIED FINANCIALS -- 0.5% Asset Management & Custody Banks -- 0.5% 320,755 Pioneer ILS Interval Fund (h) $ 3,416,038 --------------- Total Diversified Financials $ 3,416,038 -------------------------------------------------------------------------------------------------------- TOTAL MUTUAL FUND (Cost $3,400,000) $ 3,416,038 -------------------------------------------------------------------------------------------------------- TOTAL INVESTMENT IN SECURITIES -- 97.6% (Cost $746,998,711) (a) $ 729,244,746 -------------------------------------------------------------------------------------------------------- OTHER ASSETS & LIABILITIES -- 2.4% $ 17,747,796 --------------- NET ASSETS -- 100.0% $ 746,992,542 ======================================================================================================== + Amount rounds to less than 0.1%. * Non-income producing security. (PIK) Represents a pay-in-kind security. The accompanying notes are an integral part of these financial statements. Pioneer Multi-Asset Income Fund | Annual Report | 7/31/16 41 Schedule of Investments | 7/31/16 (continued) (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, 2016, the value of these securities amounted to $127,067,020 or 17.0% of net assets. REIT Real Estate Investment Trust. (Step) Bond issued with an initial coupon rate which converts to a higher rate at a later date. (Perpetual) Security with no stated maturity date. REMICS Real Estate Mortgage Investment Conduits. ** Senior floating rate loan interests in which the Fund invests generally pay interest at rates that are periodically redetermined by reference to a base lending rate plus a premium. These base lending rates are generally (i) the lending rate offered by one or more major European banks, such as LIBOR (London InterBank Offered Rate), (ii) the prime rate offered by one or more major U.S. banks, (iii) the certificate of deposit or (iv) other base lending rates used by commercial lenders. The rate shown is the coupon rate at period end. (a) At July 31, 2016, the net unrealized depreciation on investments based on cost for federal income tax purposes of $752,098,440 was as follows: Aggregate gross unrealized appreciation for all investments in which there is an excess of value over tax cost $ 34,622,102 Aggregate gross unrealized depreciation for all investments in which there is an excess of tax cost over value (57,475,796) ------------ Net unrealized depreciation $(22,853,694) ============ (b) Debt obligation with a variable interest rate. Rate shown is rate at period end. (c) Security is valued using fair value methods (other than prices supplied by independent pricing services or broker-dealers). See Notes to Financial Statements -- Note 1A. (d) Security is in default. (e) Security issued with a zero coupon. Income is earned through accretion of discount. (f) Structured reinsurance investment. At July 31, 2016, the value of these securities amounted to $4,425,408 or 0.6% of net assets. See Notes to Financial Statements -- Note 1I. (g) Rate to be determined. (h) Affiliated funds managed by Pioneer Investment Management, Inc. Principal amounts are denominated in U.S. Dollars unless otherwise noted: IDR Indonesian Rupiah MXN Mexican Peso PHP Philippine Peso Purchases and sales of securities (excluding temporary cash investments) for the year ended July 31, 2016 were as follows: -------------------------------------------------------------------------------- Purchases Sales -------------------------------------------------------------------------------- Long-Term U.S. Government $ 36,593,991 $ 36,648,071 Other Long-Term Securities $820,038,373 $951,397,121 The Fund is permitted to engage in purchase and sale transactions ("cross trades") with certain funds and accounts for which PIM serves as the investment adviser, as set forth in Rule 17a-7 under the Investment Company Act of 1940, pursuant to procedures adopted by the Board of Trustees. Under these procedures, cross trades are effected at current market prices. The accompanying notes are an integral part of these financial statements. 42 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/16 During the year ended July 31, 2016, the Fund engaged in purchases and sales pursuant to these procedures amounting to $9,768,260 and $12,454,918, respectively. Various inputs are used in determining the value of the Fund's investments. These inputs are summarized in the three broad levels listed below. Level 1 - quoted prices in active markets for identical securities. Level 2 - other significant observable inputs (including quoted prices for similar securities, interest rates, prepayment speeds, credit risk, etc.) See Notes to Financial Statements -- Note 1A. Level 3 - significant unobservable inputs (including the Fund's own assumptions in determining fair value of investments) See Notes to Financial Statements -- Note 1A. The following is a summary of the inputs used as of July 31, 2016, in valuing the Fund's investments: ---------------------------------------------------------------------------------------------------- Level 1 Level 2 Level 3 Total ---------------------------------------------------------------------------------------------------- Convertible Corporate Bonds Materials Diversified Metals & Mining $ -- $ -- $ 2,558 $ 2,558 All Other Convertible Corporate Bonds -- 1,784,619 -- 1,784,619 Preferred Stocks -- 16,992 -- 16,992 Convertible Preferred Stocks Energy Oil & Gas Exploration & Production -- 21,500 -- 21,500 All Other Convertible Preferred Stocks 4,565,474 -- -- 4,565,474 Common Stocks Capital Goods Industrial Machinery -- -- 31 31 Transportation Air Freight & Logistics -- 7,850 -- 7,850 All Other Common Stocks 386,583,455 -- -- 386,583,455 Asset Backed Securities -- 9,654,026 -- 9,654,026 Collateralized Mortgage Obligations -- 8,076,794 -- 8,076,794 Corporate Bonds Capital Goods Industrial Machinery -- 2,019,375 51,588 2,070,963 Insurance Reinsurance -- -- 4,425,408 4,425,408 All Other Corporate Bonds -- 240,967,293 -- 240,967,293 Foreign Government Bonds -- 43,914,492 -- 43,914,492 Senior Floating Rate Loan Interests -- 10,738,085 -- 10,738,085 Equity Linked Note -- 9,962,024 -- 9,962,024 Exchange Traded Funds 3,037,144 -- -- 3,037,144 Mutual Funds -- 3,416,038 -- 3,416,038 ---------------------------------------------------------------------------------------------------- Total $ 394,186,073 $ 330,579,088 $4,479,585 $729,244,746 ==================================================================================================== The accompanying notes are an integral part of these financial statements. Pioneer Multi-Asset Income Fund | Annual Report | 7/31/16 43 Schedule of Investments | 7/31/16 (continued) ----------------------------------------------------------------------------------------------------- Level 1 Level 2 Level 3 Total ----------------------------------------------------------------------------------------------------- Other Financial Instruments Net unrealized depreciation on futures contracts $ (1,773,288) $ -- $ -- $ (1,773,288) ----------------------------------------------------------------------------------------------------- Total Other Financial Instruments $ (1,773,288) $ -- $ -- $ (1,773,288) ===================================================================================================== The following is a reconciliation of assets valued using significant unobservable inputs (Level 3): -------------------------------------------------------------------------------------------------------- Convertible Corporate Common Corporate Bonds Stocks Bonds Total -------------------------------------------------------------------------------------------------------- Balance as of 7/31/15 $ -- $ 31 $ 14,654,343 $ 14,654,374 Realized gain (loss)(1) -- -- 12,390 12,390 Change in unrealized appreciation (depreciation)(2) (19,583) -- 109,146 89,563 Purchases 2,666 -- 4,806,714 4,809,380 Sales -- -- (15,105,597) (15,105,597) Transfers in to Level 3* 19,475 -- -- 19,475 Transfers out of Level 3* -- -- -- -- Transfers in and out of Level 3 Categories -- -- -- -- -------------------------------------------------------------------------------------------------------- Balance as of 7/31/16 $ 2,558 $ 31 $ 4,476,996 $ 4,479,585 ======================================================================================================== 1 Realized gain (loss) on these securities is included in the net realized gain (loss) from investments in the Statement of Operations. 2 Unrealized appreciation (depreciation) on these securities is included in the change in unrealized appreciation (depreciation) on investments in the Statement of Operations. * Transfers are calculated on beginning of period values. During the year ended July 31, 2016, an investment having a value of $19,475 was transferred from Level 2 to Level 3. The change in the level designation within the fair value hierarchy was due to valuing the security using unobservable inputs. In addition, investments having a value of $70,034,370 transferred from level 2 to level 1. The change in the level designation within the fair value hierarchy was due to the Fund discontinuing the use of adjusted quotes. There were no other transfers between levels 1, 2 and 3. Net change in unrealized appreciation (depreciation) of investments still held as of 7/31/16 $227,096 ======== The accompanying notes are an integral part of these financial statements. 44 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/16 Statement of Assets and Liabilities | 7/31/16 ASSETS: Investment in securities of unaffiliated issuers, at value (cost $743,598,711) $725,828,708 Investment in securities of affiliated issuers, at value (cost $3,400,000) 3,416,038 ------------------------------------------------------------------------------------------------ Total investment in securities, at value (cost $746,998,711) $729,244,706 Cash 9,572,834 Restricted cash* 3,231,259 Receivables -- Investment securities sold 7,074,710 Fund shares sold 1,066,315 Dividends 1,657,847 Interest 5,684,055 Due from Pioneer Investment Management, Inc. 66,902 Other assets 85,087 ------------------------------------------------------------------------------------------------ Total assets $757,683,755 ================================================================================================ LIABILITIES: Payables -- Investment securities purchased $ 5,476,826 Fund shares repurchased 3,033,772 Distributions 216,192 Trustee fees 3,110 Variation margin for futures contracts 372,138 Due to custodian (Cost $771,114) 822,414 Due to affiliates 82,178 Accrued expenses 201,930 Reserve for repatriation taxes 482,653 ------------------------------------------------------------------------------------------------ Total liabilities $ 10,691,213 ================================================================================================ NET ASSETS: Paid-in capital $851,294,110 Undistributed net investment income 914,067 Accumulated net realized loss on investments, futures contracts, written options, swap contracts and foreign currency transactions (85,632,689) Net unrealized depreciation on investments (17,753,965) Unrealized depreciation on futures contracts (1,773,288) Net unrealized depreciation on other assets and liabilities denominated in foreign currencies (55,693) ------------------------------------------------------------------------------------------------ Total net assets $746,992,542 ================================================================================================ NET ASSET VALUE PER SHARE: (No par value, unlimited number of shares authorized) Class A (based on $238,779,471/22,584,041 shares) $ 10.57 Class C (based on $304,609,497/28,886,754 shares) $ 10.55 Class K (based on $244,683/22,890 shares) $ 10.69 Class R (based on $1,224,923/115,378 shares) $ 10.62 Class Y (based on $202,133,968/19,143,339 shares) $ 10.56 MAXIMUM OFFERING PRICE: Class A ($10.57 / 95.5%) $ 11.07 ================================================================================================ * Represents restricted cash deposited at the custodian and/or counterparty for derivative contracts. The accompanying notes are an integral part of these financial statements. Pioneer Multi-Asset Income Fund | Annual Report | 7/31/16 45 Statement of Operations For the Year Ended 7/31/16 INVESTMENT INCOME: Interest (net of foreign taxes withheld of $61,906) $ 30,635,918 Dividends (net of foreign taxes withheld of $1,139,084) 24,813,772 -------------------------------------------------------------------------------------------------- Total investment income $ 55,449,690 ================================================================================================== EXPENSES: Management fees $ 4,065,226 Transfer agent fees Class A 28,628 Class C 16,728 Class K 40 Class R 572 Class Y 3,523 Distribution fees Class A 600,787 Class C 3,211,267 Class R 4,697 Shareholder communication expense 680,951 Administrative expense 280,936 Custodian fees 160,943 Registration fees 148,011 Professional fees 101,085 Printing expense 52,601 Fees and expenses of nonaffiliated Trustees 35,090 Miscellaneous 89,964 -------------------------------------------------------------------------------------------------- Total expenses $ 9,481,049 Less fees waived and expenses reimbursed by Pioneer Investment Management, Inc. (366,404) -------------------------------------------------------------------------------------------------- Net expenses $ 9,114,645 -------------------------------------------------------------------------------------------------- Net investment income $ 46,335,045 -------------------------------------------------------------------------------------------------- REALIZED AND UNREALIZED GAIN (LOSS) ON INVESTMENTS, FUTURES CONTRACTS, WRITTEN OPTIONS, SWAP CONTRACTS AND FOREIGN CURRENCY TRANSACTIONS: Net realized gain (loss) on: Investments $ (68,023,492) Futures contracts 5,973,660 Written options 769,286 Swap contracts 159,430 Foreign currency contracts and other assets and liabilities denominated in foreign currencies (988,059) $ (62,109,175) -------------------------------------------------------------------------------------------------- Change in net unrealized appreciation (depreciation) on: Investments (including from affiliated issuer of $16,038) $ 6,872,394 Futures contracts (1,792,263) Written options (238,360) Swap contracts (61,113) Foreign currency contracts and other assets and liabilities denominated in foreign currencies (26,338) $ 4,754,320 -------------------------------------------------------------------------------------------------- Net realized and unrealized gain (loss) on investments, futures contracts, written options, swap contracts and foreign currency transactions $ (57,354,855) -------------------------------------------------------------------------------------------------- Net decrease in net assets resulting from operations $ (11,019,810) ================================================================================================== The accompanying notes are an integral part of these financial statements. 46 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/16 Statement of Changes in Net Assets -------------------------------------------------------------------------------------------------- Year Ended Year Ended 7/31/16 7/31/15 -------------------------------------------------------------------------------------------------- FROM OPERATIONS: Net investment income (loss) $ 46,335,045 $ 44,692,794 Net realized gain (loss) on investments, futures contracts, written options, swap contracts and foreign currency transactions (62,109,175) (20,629,493) Change in net unrealized appreciation (depreciation) on investments, futures contracts, written options, swap contracts, and foreign currency transactions 4,754,320 (39,977,521) -------------------------------------------------------------------------------------------------- Net decrease in net assets resulting from operations $ (11,019,810) $ (15,914,220) ================================================================================================== DISTRIBUTIONS TO SHAREOWNERS: Net investment income: Class A ($0.63 and $0.66 per share, respectively) $ (14,818,563) $ (13,714,853) Class C ($0.55 and $0.56 per share, respectively) (17,162,624) (14,917,936) Class K ($0.66 and $0.48 per share, respectively) (1,245,936) (499,383) Class R ($0.59 and $0.43 per share, respectively) (53,471) (882) Class Y ($0.65 and $0.68 per share, respectively) (14,882,614) (18,374,823) -------------------------------------------------------------------------------------------------- Total distributions to shareowners $ (48,163,208) $ (47,507,877) ================================================================================================== FROM FUND SHARE TRANSACTIONS: Net proceeds from sale of shares $ 228,470,653 $ 619,264,135 Reinvestment of distributions 47,104,660 46,599,296 Cost of shares repurchased (435,914,479) (385,902,803) -------------------------------------------------------------------------------------------------- Net increase (decrease) in net assets resulting from Fund share transactions $ (160,339,166) $ 279,960,628 -------------------------------------------------------------------------------------------------- Net increase (decrease) in net assets $ (219,522,184) $ 216,538,531 NET ASSETS: Beginning of year $ 966,514,726 $ 749,976,195 -------------------------------------------------------------------------------------------------- End of year $ 746,992,542 $ 966,514,726 -------------------------------------------------------------------------------------------------- Undistributed net investment income $ 914,067 $ 4,227,839 ================================================================================================== The accompanying notes are an integral part of these financial statements. Pioneer Multi-Asset Income Fund | Annual Report | 7/31/16 47 Statement of Changes in Net Assets (continued) ------------------------------------------------------------------------------------------------ Year Ended Year Ended Year Ended Year Ended 7/31/16 7/31/16 7/31/15 7/31/15 Shares Amount Shares Amount ------------------------------------------------------------------------------------------------ Class A Shares sold 6,281,455 $ 64,920,390 15,185,837 $ 175,230,678 Reinvestment of distributions 1,387,216 14,232,424 1,152,400 13,134,497 Less shares repurchased (9,018,596) (92,585,236) (10,534,463) (120,092,929) ------------------------------------------------------------------------------------------------ Net increase (decrease) (1,349,925) $ (13,432,422) 5,803,774 $ 68,272,246 ================================================================================================ Class C Shares sold 7,019,556 $ 72,804,357 16,115,144 $ 185,166,940 Reinvestment of distributions 1,649,567 16,872,843 1,291,986 14,666,404 Less shares repurchased (11,594,822) (118,628,340) (6,135,870) (69,536,580) ------------------------------------------------------------------------------------------------ Net increase (decrease) (2,925,699) $ (28,951,140) 11,271,260 $ 130,296,764 ================================================================================================ Class K* Shares sold 22,755 $ 236,429 3,358,223 $ 38,969,021 Reinvestment of distributions 117,504 1,210,213 43,703 494,440 Less shares repurchased (3,518,425) (34,350,031) (870) (9,991) ------------------------------------------------------------------------------------------------ Net increase (decrease) (3,378,166) $ (32,903,389) 3,401,056 $ 39,453,470 ================================================================================================ Class R* Shares sold 98,278 $ 1,019,289 40,700 $ 455,831 Reinvestment of distributions 334 3,421 16 182 Less shares repurchased (23,950) (249,286) -- -- ------------------------------------------------------------------------------------------------ Net increase 74,662 $ 773,424 40,716 $ 456,013 ================================================================================================ Class Y Shares sold 8,647,619 $ 89,490,188 19,066,332 $ 219,441,665 Reinvestment of distributions 1,440,715 14,785,759 1,607,246 18,303,773 Less shares repurchased (18,561,018) (190,101,586) (17,270,776) (196,263,303) ------------------------------------------------------------------------------------------------ Net increase (decrease) (8,472,684) $ (85,825,639) 3,402,802 $ 41,482,135 ================================================================================================ * Class K and Class R shares commenced operations on December 1, 2014. The accompanying notes are an integral part of these financial statements. 48 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/16 Financial Highlights ---------------------------------------------------------------------------------------------------------------------------- Year Year Year Year Ended Ended Ended Ended 12/22/11 7/31/16 7/31/15 7/31/14 7/31/13 to 7/31/12 ---------------------------------------------------------------------------------------------------------------------------- Class A Net asset value, beginning of period $ 11.15 $ 11.94 $ 11.07 $ 10.61 $ 10.00 ---------------------------------------------------------------------------------------------------------------------------- Increase (decrease) from investment operations: Net investment income (loss) $ 0.62(a) $ 0.60 $ 0.69 $ 0.61 $ 0.36 Net realized and unrealized gain (loss) on investments (0.57) (0.73) 0.80 0.78 0.53 ---------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) from investment operations $ 0.05 $ (0.13) $ 1.49 $ 1.39 $ 0.89 ---------------------------------------------------------------------------------------------------------------------------- Distribution to shareowners: Net investment income $ (0.63) $ (0.66) $ (0.62) $ (0.73) $ (0.28) Net realized gain -- -- -- (0.20) -- ---------------------------------------------------------------------------------------------------------------------------- Total distributions $ (0.63) $ (0.66) $ (0.62) $ (0.93) $ (0.28) ---------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) in net asset value $ (0.58) $ (0.79) $ 0.87 $ 0.46 $ 0.61 ---------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $ 10.57 $ 11.15 $ 11.94 $ 11.07 $ 10.61 ============================================================================================================================ Total return* 0.81% (1.10)% 13.77% 13.52% 8.91%*** 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 5.99% 5.38% 6.62% 6.19% 5.99%** Portfolio turnover rate 109% 120% 99% 119% 42%*** Net assets, end of period (in thousands) $238,779 $266,899 $216,565 $49,263 $ 6,545 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 0.94% 0.95% 1.00% 1.37% 2.51%** Net investment income (loss) to average net assets 5.90% 5.28% 6.47% 5.67% 4.33%** ============================================================================================================================ * Assumes initial investment at net asset value at the beginning of each period, reinvestment of all distributions, the complete redemption of the investment at net asset value at the end of each period and no sales charges. Total return would be reduced if sales charges were taken into account. ** Annualized. *** Not annualized. (a) The per-share data presented above is based on the average shares outstanding for the period presented. The accompanying notes are an integral part of these financial statements. Pioneer Multi-Asset Income Fund | Annual Report | 7/31/16 49 Financial Highlights (continued) --------------------------------------------------------------------------------------------------------------------------- Year Year Year Year Ended Ended Ended Ended 12/22/11 7/31/16 7/31/15 7/31/14 7/31/13 to 7/31/12 --------------------------------------------------------------------------------------------------------------------------- Class C Net asset value, beginning of period $ 11.12 $ 11.91 $ 11.04 $ 10.60 $ 10.00 --------------------------------------------------------------------------------------------------------------------------- Increase (decrease) from investment operations: Net investment income (loss) $ 0.53(a) $ 0.51 $ 0.57 $ 0.52 $ 0.32 Net realized and unrealized gain (loss) on investments (0.55) (0.74) 0.82 0.75 0.52 --------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) from investment operations $ (0.02) $ (0.23) $ 1.39 $ 1.27 $ 0.84 --------------------------------------------------------------------------------------------------------------------------- Distribution to shareowners: Net investment income $ (0.55) $ (0.56) $ (0.52) $ (0.63) $ (0.24) Net realized gain -- -- -- (0.20) -- --------------------------------------------------------------------------------------------------------------------------- Total distributions $ (0.55) $ (0.56) $ (0.52) $ (0.83) $ (0.24) --------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) in net asset value $ (0.57) $ (0.79) $ 0.87 $ 0.44 $ 0.60 --------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $ 10.55 $ 11.12 $ 11.91 $ 11.04 $ 10.60 =========================================================================================================================== Total return* 0.06% (1.89)% 12.84% 12.39% 8.45%*** Ratio of net expenses to average net assets 1.69% 1.69% 1.72% 1.71% 1.67%** Ratio of net investment income (loss) to average net assets 5.16% 4.59% 5.73% 5.24% 5.17%** Portfolio turnover rate 109% 120% 99% 119% 42%*** Net assets, end of period (in thousands) $304,609 $353,686 $244,574 $35,074 $ 5,831 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 1.69% 1.69% 1.72% 2.13% 3.26%** Net investment income (loss) to average net assets 5.16% 4.59% 5.73% 4.81% 3.58%** =========================================================================================================================== * Assumes initial investment at net asset value at the beginning of each period, reinvestment of all distributions, the complete redemption of the investment at net asset value at the end of each period and no sales charges. Total return would be reduced if sales charges were taken into account. ** Annualized. *** Not annualized. (a) The per-share data presented above is based on the average shares outstanding for the period presented. The accompanying notes are an integral part of these financial statements. 50 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/16 ---------------------------------------------------------------------------------------------- Year Ended 12/1/14 7/31/16 to 7/31/15 ---------------------------------------------------------------------------------------------- Class K Net asset value, beginning of period $ 11.15 $ 11.50 ---------------------------------------------------------------------------------------------- Increase (decrease) from investment operations: Net investment income (loss) $ 0.57(a) $ 0.50 Net realized and unrealized gain (loss) on investments (0.37) (0.37) ---------------------------------------------------------------------------------------------- Net increase (decrease) from investment operations $ 0.20 $ 0.13 ---------------------------------------------------------------------------------------------- Distribution to shareowners: Net investment income $ (0.66) $ (0.48) Net realized gain -- -- ---------------------------------------------------------------------------------------------- Total distributions $ (0.66) $ (0.48) ---------------------------------------------------------------------------------------------- Net increase (decrease) in net asset value $ (0.46) $ (0.35) ---------------------------------------------------------------------------------------------- Net asset value, end of period $ 10.69 $ 11.15 ============================================================================================== Total return* 2.20% 1.13%*** Ratio of net expenses to average net assets 0.60% 0.63%** Ratio of net investment income (loss) to average net assets 5.51% 5.63%** Portfolio turnover rate 109% 120%** Net assets, end of period (in thousands) $ 245 $37,935 ============================================================================================== * 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. ** Annualized. *** Not annualized. (a) The per-share data presented above is based on the average shares outstanding for the period presented. The accompanying notes are an integral part of these financial statements. Pioneer Multi-Asset Income Fund | Annual Report | 7/31/16 51 Financial Highlights (continued) ---------------------------------------------------------------------------------------------- Year Ended 12/1/14 7/31/16 to 7/31/15 ---------------------------------------------------------------------------------------------- Class R Net asset value, beginning of period $ 11.20 $ 11.50 ---------------------------------------------------------------------------------------------- Increase (decrease) from investment operations: Net investment income (loss) $ 0.59(a) $ 0.43 Net realized and unrealized gain (loss) on investments (0.58) (0.30) ---------------------------------------------------------------------------------------------- Net increase (decrease) from investment operations $ 0.01 $ 0.13 ---------------------------------------------------------------------------------------------- Distribution to shareowners: Net investment income $ (0.59) $ (0.43) Net realized gain -- -- ---------------------------------------------------------------------------------------------- Total distributions $ (0.59) $ (0.43) ---------------------------------------------------------------------------------------------- Net increase (decrease) in net asset value $ (0.58) $ (0.30) ---------------------------------------------------------------------------------------------- Net asset value, end of period $ 10.62 $ 11.20 ============================================================================================== Total return* 0.41% 1.16%*** Ratio of net expenses to average net assets 1.37% 1.40%** Ratio of net investment income (loss) to average net assets 5.68% 4.20%** Portfolio turnover rate 109% 120%** Net assets, end of period (in thousands) $ 1,225 $ 456 ============================================================================================== * 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. ** Annualized. *** Not annualized. (a) The per-share data presented above is based on the average shares outstanding for the period presented. The accompanying notes are an integral part of these financial statements. 52 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/16 ----------------------------------------------------------------------------------------------------------------------------- Year Year Year Year Ended Ended Ended Ended 12/22/11 7/31/16 7/31/15 7/31/14 7/31/13 to 7/31/12 ----------------------------------------------------------------------------------------------------------------------------- Class Y Net asset value, beginning of period $ 11.14 $ 11.93 $ 11.06 $ 10.62 $ 10.00 ----------------------------------------------------------------------------------------------------------------------------- Increase (decrease) from investment operations: Net investment income (loss) $ 0.63(a) $ 0.63 $ 0.68 $ 0.63 $ 0.39 Net realized and unrealized gain (loss) on investments (0.56) (0.74) 0.84 0.76 0.51 ----------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) from investment operations $ 0.07 $ (0.11) $ 1.52 $ 1.39 $ 0.90 ----------------------------------------------------------------------------------------------------------------------------- Distribution to shareowners: Net investment income $ (0.65) $ (0.68) $ (0.65) $ (0.75) $ (0.28) Net realized gain -- -- -- (0.20) -- ----------------------------------------------------------------------------------------------------------------------------- Total distributions $ (0.65) $ (0.68) $ (0.65) $ (0.95) $ (0.28) ----------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) in net asset value $ (0.58) $ (0.79) $ 0.87 $ 0.44 $ 0.62 ----------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $ 10.56 $ 11.14 $ 11.93 $ 11.06 $ 10.62 ============================================================================================================================= Total return* 1.00% (0.89)% 14.01% 13.53% 9.10%*** 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 6.10% 5.58% 6.58% 6.23% 6.16%** Portfolio turnover rate 109% 120% 99% 119% 42%*** Net assets, end of period (in thousands) $202,134 $307,538 $288,838 $32,492 $ 5,418 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 0.72% 0.71% 0.71% 1.10% 2.25%** Net investment income (loss) to average net assets 6.04% 5.52% 6.52% 5.79% 4.56%** ============================================================================================================================= * 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. ** Annualized. *** Not annualized. (a) The per-share data presented above is based on the average shares outstanding for the period presented. The accompanying notes are an integral part of these financial statements. Pioneer Multi-Asset Income Fund | Annual Report | 7/31/16 53 Notes to Financial Statements | 7/31/16 1. Organization and Significant Accounting Policies Pioneer Multi-Asset Income Fund (the Fund) is one of three 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 shareholder approval. Under per-share voting, each share of a class of the Fund is entitled to one vote. Under dollar-weighted voting, a shareholder's voting power is determined not by the number of shares owned, but by the dollar value of the shares on the record date. Each share class has exclusive voting rights with respect to matters affecting only that class, including with respect to the distribution plan for that class. There is no distribution plan for Class Y shares. The Fund's financial statements have been prepared in conformity with U.S. generally accepted accounting principles (U.S. GAAP) that require the management of the Fund to, among other things, make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of income, expenses and gains and losses on investments during the reporting period. Actual results could differ from those estimates. The Fund is an investment company and follows investment company accounting and reporting guidance under U.S. GAAP. The following is a summary of significant accounting policies followed by the Fund in the preparation of its financial statements: 54 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/16 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. Foreign securities are valued in U.S. dollars based on foreign currency exchange rate quotations supplied by a third party pricing service. 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. Valuations may be supplemented by dealers and other sources, as required. 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. 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. Pioneer Multi-Asset Income Fund | Annual Report | 7/31/16 55 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. 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 Dealer association members. Centrally cleared swaps are valued at the daily settlement price provided by the central clearing counterparty. Options contracts are generally valued at the mean between the last bid and ask prices on the principal exchange where they are traded. Over-the-counter ("OTC") options and options on swaps ("swaptions") are valued using prices supplied by independent pricing services, which consider such factors as market prices, market events, quotations from one or more brokers, Treasury 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. 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. Securities or loan interests for which independent pricing services 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 Pioneer Investment Management, Inc. (PIM), the Fund's investment adviser, pursuant to procedures adopted by the Fund's Board of Trustees. PIM's fair valuation team uses fair value methods approved by the Valuation Committee of the Board of Trustees. PIM'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 56 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/16 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, 2016, three securities were valued using fair value methods (in addition to securities valued using prices supplied by independent pricing services, broker-dealers or through a third party using an insurance valuation model) representing 0.1% of net assets. B. Investment Income and Transactions 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. 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. 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 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/16 57 investments are not segregated in the statement of operations from the effects of changes in the market prices of those securities, but are included with the net realized and unrealized gain or loss on investments. D. Forward Foreign Currency Contracts The Fund may enter into forward foreign currency contracts (contracts) for the purchase or sale of a specific foreign currency at a fixed price on a future date. All contracts are marked to market daily at the applicable exchange rates, and any resulting unrealized gains or losses are recorded in the Fund's financial statements. The Fund records realized gains and losses at the time a portfolio hedge 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 5). E. Federal Income Taxes It is the Fund's policy to comply with the requirements of the Internal Revenue Code applicable to regulated investment companies and to distribute all of its net taxable income and net realized capital gains, if any, to its shareowners. Therefore, no provision for federal income taxes is required. As of July 31, 2016, the Fund did not accrue any interest or penalties with respect to uncertain tax positions, which, if applicable, would be recorded as an income tax expense in the Statement of Operations. Tax returns filed within the prior three years remain subject to examination by federal and state tax authorities. 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, 2016, the Fund had accrued $482,653 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 overdistributions for financial statement purposes resulting from differences in the recognition or classification of income or distributions for financial statement and tax purposes. Capital accounts within the financial statements are adjusted for permanent book/tax differences to reflect tax character, but are not adjusted for temporary differences. At July 31, 2016, the Fund reclassified $1,485,609 58 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/16 to decrease undistributed net investment income and $1,485,609 to decrease accumulated net realized loss on investments, futures contracts, written options, swap contracts and foreign currency transactions to reflect permanent book/tax differences. These adjustments have no impact on the net assets or results of operations. At July 31, 2016, the Fund was permitted to carry forward indefinitely $50,595,684 of short-term losses and $33,311,867 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, 2016 and July 31, 2015 were as follows: --------------------------------------------------------------------------- 2016 2015 --------------------------------------------------------------------------- Distributions paid from: Ordinary income $48,163,208 $47,507,877 --------------------------------------------------------------------------- Total $48,163,208 $47,507,877 =========================================================================== The following shows the components of distributable earnings on a federal income tax basis at July 31, 2016: --------------------------------------------------------------------------- 2016 --------------------------------------------------------------------------- Distribution paid from: Undistributed ordinary income $ 2,731,562 Capital loss carryforward (83,907,551) Current year dividend payable (216,192) Unrealized depreciation (22,909,387) --------------------------------------------------------------------------- Total $(104,301,568) =========================================================================== The difference between book basis and tax basis 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 futures contracts, tax basis adjustments on Real Estate Investment Trust (REIT) holdings, Business Development Company (BDC) and interest on defaulted bonds. F. Fund Shares The Fund records sales and repurchases of its shares as of trade date. Pioneer Funds Distributor, Inc. (PFD), the principal underwriter for the Fund and a wholly owned indirect subsidiary of UniCredit S.p.A. (UniCredit), earned $149,832 in underwriting commissions on the sale of Class A shares during the year ended July 31, 2016. Pioneer Multi-Asset Income Fund | Annual Report | 7/31/16 59 G. Class Allocations Income, common expenses, and realized and unrealized gains and losses are calculated at the Fund level and allocated daily to each class of shares based on its respective percentage of adjusted net assets at the beginning of the day. Distribution fees are calculated based on the average daily net asset value attributable to Class A, 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. H. Risks Interest rates in the U.S. recently have been historically low, so the Fund faces a heightened risk that interest rates may rise. A general rise in interest rates may cause investors to move out of fixed income securities on a large scale, which could adversely affect the price and liquidity of fixed income securities and could also result in increased redemptions from the Fund. Certain securities in which the Fund invests, including floating rate loans, once sold, may not settle for an extended period (for example, several weeks or even longer). The Fund will not receive its sale proceeds until that time, which may constrain the Fund's ability to meet its obligations. 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 underlying issuers and their inability to meet their debt obligations. 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. I. Insurance-linked securities (ILS) The Fund invests in event-linked bonds. Event-linked bonds are floating rate debt obligations for which the return of principal and the payment of interest are contingent on the non-occurrence of a pre-defined "trigger" event, such as a hurricane or an earthquake of a specific magnitude. The trigger event's 60 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/16 magnitude may be based on losses to a company or industry, industry indexes or readings of scientific instruments, or may be based on specified actual losses. If a trigger event, as defined within the terms of an event-linked bond occurs, the Fund may lose a portion or all of its accrued interest and/or principal invested in such event-linked bond. The Fund is entitled to receive principal and interest payments so long as no trigger event occurs of the description and magnitude specified by the instrument. In addition to the specified trigger events, event-linked bonds may expose the Fund to other risks, including but not limited to issuer (credit) default, adverse regulatory or jurisdictional interpretations and adverse tax consequences. The Fund's investments in ILS may include special purpose vehicles ("SPVs") or similar instruments structured to comprise a portion of a reinsurer's catastrophe-oriented business, known as quota share instruments (sometimes referred to as reinsurance sidecars), or to provide reinsurance relating to specific risks to insurance or reinsurance companies through a collateralized instrument, known as collateralized reinsurance. Structured reinsurance investments, which also may include industry loss warranties ("ILWs"). A traditional ILW takes the form of a bilateral reinsurance contract, but there are also products that take the form of derivatives, collateralized structures, or exchange traded instruments. Structured reinsurance investments, including quota share instruments, collateralized reinsurance investments and ILWs, generally are subject to the same risks as event-linked bonds. In addition, where the instruments are based on the performance of underlying reinsurance contracts, the Fund has limited transparency into the individual underlying contracts and therefore must rely upon the risk assessment and sound underwriting practices of the issuer. Accordingly, it may be more difficult for PIM 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 PIM had more complete information. Structured reinsurance instruments generally will be considered illiquid securities by the Fund. These securities may be difficult to purchase, sell or unwind. Illiquid securities also may be difficult to value. If the Fund is forced to sell an illiquid asset, the Fund may be forced to sell at a loss. J. 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 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/16 61 of cash deposited with the broker as collateral at July 31, 2016, was $3,265,000 and is recorded within "Restricted cash" in the Statement of Assets and Liabilities. Subsequent payments for futures contracts ("variation margin") are paid or received by the Fund, depending on the daily fluctuation in the value of the contracts, and are recorded by the Fund as unrealized appreciation and depreciation. When the contract is closed, the Fund realizes a gain or loss equal to the difference between the opening and closing value of the contract as well as any fluctuation in foreign currency exchange rates where applicable. The use of futures contracts involves, to varying degrees, elements of market, interest rate, currency exchange rate and counterparty risks, which may exceed the amounts recognized by the Fund. Changes in value of the contracts may not directly correlate to the changes in value of the underlying securities. The average value of contracts open during the year ended July 31, 2016, was $(67,997,722). At July 31, 2016, open futures contracts were as follows: ----------------------------------------------------------------------------------------- Number of Contracts Settlement Unrealized Description Counterparty Long/(Short) Month/Year Value Depreciation ----------------------------------------------------------------------------------------- S&P500 EMINI Citibank N.A. (700) 9/16 $(75,887,000) $(1,602,647) JPY FX Citibank N.A. (63) 9/16 (7,732,856) (170,641) ----------------------------------------------------------------------------------------- Total $(83,619,856) $(1,773,288) ========================================================================================= K. 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 subcustodian of the Fund. The Fund's investment adviser, PIM 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, 2016, the Fund had no open repurchase agreements. 62 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/16 L. Credit Default Swaps A credit default swap is a contract between a buyer of protection and a seller of protection against a pre-defined credit event on an underlying reference obligation, which may be a single security or a basket or index of securities. The Fund may sell or buy credit default swap contracts to seek to increase the Fund's income or to attempt to hedge the risk of default on portfolio securities. As a seller of protection, the Fund would be required to pay the notional (or other agreed upon) value of the referenced debt obligation to the counterparty in the event of a default by a U.S. or foreign corporate issuer of a debt obligation, which would likely result in a loss to the Fund. In return, the Fund would receive from the counterparty a periodic stream of payments during the term of the contract provided that no event of default occurred. The maximum exposure of loss to the Fund as seller of protection would be the notional value of the credit default swaps outstanding. If no default occurs, the Fund would keep the stream of payments and would have no payment obligation. The Fund may also buy credit default swap contracts in order to hedge against the risk of default of debt securities, in which case the Fund would function as the counterparty described above. When the Fund enters into a credit default swap contract, either the buyer or seller of protection will make a rebalancing payment to the other party. The amount of the rebalancing payment is determined based on the value of the contract on the trade date. Periodic payments received or paid by the Fund are recorded as realized gains or losses. The credit default swap contracts are marked-to-market daily using valuations supplied by independent sources and the change in value, if any, is recorded as unrealized appreciation or depreciation. Payments received or made as a result of a credit event or upon termination of the contract are recognized, net of the appropriate amount of the upfront payment, as realized gains or losses. Credit default swap contracts involving the sale of protection may involve greater risks than if the Fund had invested in the referenced debt instrument directly. Credit default swap contracts are subject to general market risk, liquidity risk, counterparty risk and credit risk. If the Fund is a protection buyer and no credit event occurs, it will lose its investment. If the Fund is a protection seller and a credit event occurs, the value of the referenced debt instrument received by the Fund, together with the periodic payments received, may be less than the amount the Fund pays to the protection buyer, resulting in a loss to the Fund. In addition, obligations under sell protection credit default swaps may be partially offset by net amounts received from settlement of buy protection credit default swaps entered into by the Fund for the same reference obligation with the same counterparty. Pioneer Multi-Asset Income Fund | Annual Report | 7/31/16 63 Certain swap contracts that are cleared through a central clearinghouse are referred to as centrally cleared swaps. All payments made or received by the Fund are pursuant to a centrally cleared swap contract with the central clearing party rather than the original counterparty. Upon entering into a centrally cleared swap contract, the Fund is required to make an initial margin deposit, either in cash or in securities. The daily change in value on open centrally cleared contracts is recorded as variation margin on centrally cleared swaps on the Statement of Assets and Liabilities. The average value of credit default swap contracts open during the year ended July 31, 2016 was $(12,328). There were no open credit default swap contracts at July 31, 2016. M. Option Writing The Fund may write put and covered call options to seek to increase total return. When an option is written, the Fund receives a premium and becomes obligated to purchase or sell the underlying security at a fixed price, upon the exercise of the option. When the Fund writes an option, an amount equal to the premium received by the Fund is recorded as a liability and is subsequently adjusted to the current value of the option written. Premiums received from writing options that expire unexercised are treated by the Fund on the expiration date as realized gains from investments. The difference between the premium and the amount paid on effecting a closing purchase transaction, including brokerage commissions, is also treated as a realized gain, or, if the premium is less than the amount paid for the closing purchase transaction, as a realized loss. If a call option is exercised, the premium is added to the proceeds from the sale of the underlying security in determining whether the Fund has realized a gain or loss. The Fund as writer of an option bears the market risk of an unfavorable change in the price of the security underlying the written option. The average value of written options contracts open during the year ended July 31, 2016 was $(63,231). There were no open written options contracts at July 31, 2016. Transactions in written options for the year ended July 31, 2016 were as follows: -------------------------------------------------------------------------------- Number of Premium Contracts Paid -------------------------------------------------------------------------------- Options open at beginning of period (46,139) $ (983,335) Options opened 45,092 541,104 Options exercised (524) (176,585) Options closed 349 124,591 Options expired 1,222 494,225 -------------------------------------------------------------------------------- Options open at end of period -- $ -- ================================================================================ 64 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/16 N. Purchased Options The Fund may purchase put and call options in order 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 in the Statement of Assets and Liabilities as an investment. All premiums are marked-to-market daily, and any unrealized appreciation or depreciation are recorded in the Fund's financial statements. As the purchaser of an index option, the Fund has the right to receive a cash payment equal to any depreciation in the value of the index below the strike price of the option (in the case of a put) or equal to any appreciation in the value of the index over the strike price of the option (in the case of a call) as of the valuation date of the option. Premiums paid for purchased calls and put options which have expired are treated as realized losses on investments in the Statement of Operations. Upon the exercise or closing of a purchased put option, the premium is offset against the proceeds on the sale of the underlying security or financial instrument in order to determine the realized gain or loss on investments. Upon the exercise or closing of a purchased call option, the premium is added to the cost of the security or financial instrument. The risk associated with purchasing options is limited to the premium originally paid. The average value of purchased options contracts open during the year ended July 31, 2016 was $650,963. There were no open purchased options contracts at July 31, 2016. 2. Management Agreement PIM, a wholly owned indirect subsidiary of UniCredit, manages the Fund's portfolio. Management fees are calculated daily at the annual rate of 0.50% of the Fund's average daily net assets up to $1 billion and 0.45% on assets over $1 billion. For the year ended July 31, 2016, the effective management fee (excluding waivers and/or assumption of expenses) was equal to 0.50% of the Fund's average daily net assets. PIM has contractually agreed to limit ordinary operating expenses to the extent required to reduce Fund expenses to 0.85%, 1.75%, and 0.65% of the average daily net assets attributable to Class A, Class C and Class Y shares, respectively. Fees waived and expenses reimbursed during the year ended July 31, 2016 are reflected on the Statement of Operations. These expense limitations are in effect through December 1, 2016 for Class C shares and December 1, 2017 for Class A shares and Class Y shares. There can be no assurance that PIM will extend the expense limitation agreement for a class of shares beyond the date referred to above. Pioneer Multi-Asset Income Fund | Annual Report | 7/31/16 65 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 $42,361 in management fees, administrative costs and certain other reimbursements payable from PIM at July 31, 2016. 3. Transfer Agent Effective November 2, 2015, Boston Financial Data Services, Inc. serves as the transfer agent to the Fund at negotiated rates. Transfer agent fees and payables shown on the Statement of Operations and the Statement of Assets and Liabilities, respectively, include sub-transfer agent expenses incurred through the Fund's omnibus relationship contracts. Prior to November 2, 2015, Pioneer Investment Management Shareholder Services, Inc., a wholly owned indirect subsidiary of UniCredit, provided substantially all transfer agent and shareowner services to the Fund at negotiated rates. In addition, the Fund reimbursed the transfer agent for out-of-pocket expenses incurred by the transfer agent related to shareholder communications activities such as proxy and statement mailings and outgoing phone calls. For the year ended July 31, 2016, such out-of-pocket expenses by class of shares were as follows: -------------------------------------------------------------------------------- Shareholder Communications: -------------------------------------------------------------------------------- Class A $163,295 Class C 251,438 Class K 11 Class R 1,869 Class Y 264,338 -------------------------------------------------------------------------------- Total $680,951 ================================================================================ 4. Distribution Plan The Fund has adopted a Distribution Plan pursuant to Rule 12b-1 of the Investment Company Act of 1940 with respect to its Class A, Class C and Class R shares. Pursuant to the Plan, the Fund pays PFD 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 PFD 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 also pays PFD 0.50% of the average daily net assets attributable to Class R shares. Separate service plan provides for payment to financial 66 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/16 intermediaries of up to 0.25% of average daily net assets attributable to Class R shares. Included in "Due to affiliates" reflected on the Statement of Assets and Liabilities is $39,817 in distribution fees payable to PFD at January 31, 2016. In addition, redemptions of each class of shares (except Class Y shares) may be subject to a contingent deferred sales charge (CDSC). A CDSC of 1.00% may be imposed on redemptions of certain net asset value purchases of Class A shares within 12 months of purchase. Redemptions of Class C shares within 12 months of purchase are subject to a CDSC of 1.00%, based on the lower of cost or market value of shares being redeemed. Shares purchased as part of an exchange remain subject to any CDSC that applied to the original purchase of those shares. There is no CDSC for Class Y shares. Proceeds from the CDSCs are paid to PFD. For the year ended July 31, 2016, CDSC's in the amount of $24,611 were paid to PFD. 5. Forward Foreign Currency Contracts At July 31, 2016, the Fund had entered into various forward foreign currency contracts that obligate the Fund to deliver or take delivery of currencies at specified future maturity dates. Alternatively, prior to the settlement date of a forward foreign currency contract. The average value of forward foreign currency contracts open during the year ended July 31, 2016 was $(300,303). There were no open forward foreign currency contracts at July 31, 2016. 6. Line of Credit Facility The Fund, along with certain other funds in the Pioneer Family of Funds (the Funds), participates in a committed, unsecured revolving line of credit facility. Borrowings are used solely for temporary or emergency purposes. The Fund may borrow up to the lesser of the amount available under the facility or the limits set for borrowing by the Fund's prospectus and the 1940 Act. The credit facility in effect until February 9, 2016, was in the amount of $240 million. Effective February 10, 2016, the facility is in the amount of $220 million. Under such facility, depending on the type of loan, interest on borrowings is payable at the London Interbank Offered Rate (LIBOR) plus 0.85% on an annualized basis, or the Alternate Base Rate, which is the greater of (a) the facility's administrative agent's daily announced prime rate on the borrowing date, (b) 2% plus the Federal Funds Rate on the borrowing date and (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, 2016, the Fund had no borrowings under the credit facility. Pioneer Multi-Asset Income Fund | Annual Report | 7/31/16 67 7. Additional Disclosures about Derivative Instruments and Hedging Activities: The Fund's use of derivatives subjects it to the following risks: Interest rate risk relates to the fluctuations in the value of interest-bearing securities due to changes in the prevailing levels of market interest rates. Credit risk relates to the ability of the issuer of a financial instrument to make further principal or interest payments on an obligation or commitment that it has to the Fund. Foreign exchange rate risk relates to fluctuations in the value of an asset or liability due to changes in currency exchange rates. Equity risk relates to the fluctuations in the value of financial instruments as a result of changes in market prices (other than those arising from interest rate risk or foreign exchange risk), whether caused by factors specific to an individual investment, its issuer, or all factors affecting all instruments traded in a market or market segment. Commodity risk relates to the risk that the value of a commodity or commodity index will fluctuate based on increases or decreases in the commodities market and factors specific to a particular industry or commodity. The fair value of open derivative instruments (not considered to be hedging instruments for accounting disclosure purposes) by risk exposure at July 31, 2016, was as follows: ---------------------------------------------------------------------------------------------------- Foreign Statement of Interest Credit Exchange Equity Commodity Assets and Liabilities Rate Risk Risk Rate Risk Risk Risk ---------------------------------------------------------------------------------------------------- Liabilities Futures contracts* $-- $-- $170,641 $1,602,647 $ -- ---------------------------------------------------------------------------------------------------- Total Value $-- $-- $170,641 $1,602,647 $ -- ==================================================================================================== * Reflects unrealized appreciation/depreciation of futures contracts (see Note 1J). The current day's variation margin is disclosed on the Statement of Assets and Liabilities. 68 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/16 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, 2016, was as follows: -------------------------------------------------------------------------------------------------- Foreign Statement of Interest Credit Exchange Equity Commodity Operations Rate Risk Risk Rate Risk Risk Risk -------------------------------------------------------------------------------------------------- Net realized gain (loss) on Futures contracts $(53,250) $ -- $ 119,622 $ 5,907,288 $ -- Written options -- -- -- 769,286 -- Swap contracts -- 159,430 -- -- -- Forward foreign currency contracts** -- -- (42,452) -- -- -------------------------------------------------------------------------------------------------- Total Value $(53,250) $159,430 $ 77,170 $ 6,676,574 $ -- -------------------------------------------------------------------------------------------------- -------------------------------------------------------------------------------------------------- Foreign Statement of Interest Credit Exchange Equity Commodity Operations Rate Risk Risk Rate Risk Risk Risk -------------------------------------------------------------------------------------------------- Change in net unrealized appreciation (depreciation) on Futures contracts $ -- $ -- $(431,022) $(1,361,241) $ -- Written options -- -- -- 238,360 -- Swap contracts -- 61,113 -- -- -- Forward foreign currency contracts** -- -- 146 -- -- -------------------------------------------------------------------------------------------------- Total Value $ -- $ 61,113 $(430,876) $(1,122,881) $ -- ================================================================================================== ** Included in the amount shown on the Statement of Operations as forward foreign currency contracts and other assets and liabilities denominated in foreign currencies. Pioneer Multi-Asset Income Fund | Annual Report | 7/31/16 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: -------------------------------------------------------------------------------- We have audited the accompanying statement of assets and liabilities, including the schedule of investments, of Pioneer Multi-Asset Income Fund (the "Fund"), one of the funds constituting Pioneer Series Trust IV, as of July 31, 2016, 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. These financial statements and financial highlights are the responsibility of the Fund's management. Our responsibility is to express an opinion on these financial statements and financial highlights based on our audits. The financial highlights for the years ended July 31, 2013, and 2012, were audited by other auditors. Those auditors expressed an unqualified opinion on those financial statements and financial highlights in their report dated September 24, 2013. We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements and financial highlights are free of material misstatement. The Fund is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. Our audits included consideration of internal control over financial reporting as a basis for designing audit procedures that are appropriate in the circumstances, but not for the purpose of expressing an opinion on the effectiveness of the Fund's internal control over financial reporting. Accordingly, we express no such opinion. An audit also includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements, assessing the accounting principles used and significant estimates made by management, as well as evaluating the overall financial statement presentation. Our procedures included confirmation of securities owned as of July 31, 2016, by correspondence with the custodian, brokers and agent banks; where replies were not received from brokers and agent banks, we performed other auditing procedures. We believe that our audits provide a reasonable basis for our opinion. In our opinion, the financial statements and financial highlights referred to above present fairly, in all material respects, the financial position of Pioneer Multi-Asset Income Fund as of July 31, 2016, 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 accounting principles generally accepted in the United States of America. /s/ Deloitte & Touche LLP Boston, Massachusetts September 28, 2016 70 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/16 ADDITIONAL INFORMATION (unaudited) For the year ended July 31, 2016, 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 2015 form 1099-DIV. The qualifying percentage of the Fund's ordinary income dividends for the purpose of the corporate dividends received deduction was 14.97%. The percentages of the Fund's ordinary income distributions that are exempt from nonresident alien (NRA) tax withholding resulting from qualified interest income was 44.37%. Pioneer Multi-Asset Income Fund | Annual Report | 7/31/16 71 Trustees, Officers and Service Providers Investment Adviser Pioneer Investment Management, Inc. Custodian and Sub-Administrator Brown Brothers Harriman & Co. Independent Registered Public Accounting Firm Deloitte & Touche LLP Principal Underwriter Pioneer Funds Distributor, Inc. Legal Counsel Morgan, Lewis & Bockius LLP Shareowner Services and Transfer Agent Boston Financial Data Services, Inc. Proxy Voting Policies and Procedures of the Fund are available without charge, upon request, by calling our toll free number (1-800-225-6292). Information regarding how the Fund voted proxies relating to portfolio securities during the most recent 12-month period ended June 30 is publicly available to shareowners at us.pioneerinvestments.com. This information is also available on the Securities and Exchange Commission's web site at www.sec.gov. Trustees and Officers The Fund's Trustees and officers are listed below, together with their principal occupations during at least the past five years. Trustees who are interested persons of the Fund within the meaning of the 1940 Act are referred to as Interested Trustees. Trustees who are not interested persons of the Fund are referred to as Independent Trustees. Each of the Trustees serves as a Trustee of each of the 45 U.S. registered investment portfolios for which Pioneer serves as investment adviser (the "Pioneer Funds"). The address for all Trustees and all officers of the Fund is 60 State Street, Boston, Massachusetts 02109. The Statement of Additional Information of the Fund includes additional information about the Trustees and is available, without charge, upon request, by calling 1-800-225-6292. 72 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/16 Independent Trustees ------------------------------------------------------------------------------------------------------------------------------------ Name, Age and Term of Office and Other Directorships Position Held with the Fund Length of Service Principal Occupation Held by Trustee ------------------------------------------------------------------------------------------------------------------------------------ Thomas J. Perna (66) Trustee since 2011. Serves Private investor (2004 - 2008 and 2013 - Director, Broadridge Chairman of the Board until a successor trustee present); Chairman (2008 - 2013) and Chief Financial Solutions, Inc. and Trustee is elected or earlier Executive Officer (2008 - 2012), Quadriserv, (investor communications retirement or removal. Inc. (technology products for securities and securities processing lending industry); and Senior Executive provider for financial Vice President, The Bank of New York services industry) (2009 (financial and securities services) (1986 - - present); Director, 2004) Quadriserv, Inc. (2005 - 2013); and Commissioner, New Jersey State Civil Service Commission (2011 - present) ------------------------------------------------------------------------------------------------------------------------------------ David R. Bock (72) Trustee since 2011. Serves Managing Partner, Federal City Capital Director of New York Trustee until a successor trustee Advisors (corporate advisory services Mortgage Trust is elected or earlier company) (1997 - 2004 and 2008 - present); (publicly-traded mortgage retirement or removal. Interim Chief Executive Officer, Oxford REIT) (2004 - 2009, 2012 Analytica, Inc. (privately-held research - present); Director of and consulting company) (2010); Executive The Swiss Helvetia Fund, Vice President and Chief Financial Officer, Inc. (closed-end fund) I-trax, Inc. (publicly traded health care (2010 - present); services company) (2004 - 2007); and Director of Oxford Executive Vice President and Chief Analytica, Inc. (2008 - Financial Officer, Pedestal Inc. present); and Director of (internet-based mortgage trading company) Enterprise Community (2000 - 2002); Private consultant (1995 - Investment, Inc. 1997), Managing Director, Lehman Brothers (privately-held (investment banking firm) (1992 - 1995); and affordable housing finance Executive, The World Bank (1979 - 1992) company) (1985 - 2010) ------------------------------------------------------------------------------------------------------------------------------------ Benjamin M. Friedman (71) Trustee since 2011. Serves William Joseph Maier Professor of Political Trustee, Mellon Trustee until a successor trustee Economy, Harvard University (1972 - Institutional Funds is elected or earlier present) Investment Trust and retirement or removal. Mellon Institutional Funds Master Portfolio (oversaw 17 portfolios in fund complex) (1989 - 2008) ------------------------------------------------------------------------------------------------------------------------------------ Pioneer Multi-Asset Income Fund | Annual Report | 7/31/16 73 Independent Trustees (continued) ------------------------------------------------------------------------------------------------------------------------------------ Name, Age and Term of Office and Other Directorships Position Held with the Fund Length of Service Principal Occupation Held by Trustee ------------------------------------------------------------------------------------------------------------------------------------ Margaret B.W. Graham (69) Trustee since 2011. Serves Founding Director, Vice President and None Trustee until a successor trustee Corporate Secretary, The Winthrop Group, is elected or earlier Inc. (consulting firm) (1982 - present); retirement or removal. Desautels Faculty of Management, McGill University (1999 - present); and Manager of Research Operations and Organizational Learning, Xerox PARC, Xerox's advance research center (1990-1994) ------------------------------------------------------------------------------------------------------------------------------------ Marguerite A. Piret (68) Trustee since 2011. Serves President and Chief Executive Officer, Director of New America Trustee until a successor trustee Newbury Piret Company (investment banking High Income Fund, Inc. is elected or earlier firm) (1981 - present) (closed-end investment retirement or removal. company) (2004 - present); and Member, Board of Governors, Investment Company Institute (2000 - 2006) ------------------------------------------------------------------------------------------------------------------------------------ Fred J. Ricciardi (69) Trustee since 2014. Serves Consultant (investment company services) None Trustee until a successor trustee (2012 - present); Executive Vice President, is elected or earlier BNY Mellon (financial and investment company retirement or removal. services) (1969 - 2012); Director, BNY International Financing Corp. (financial services) (2002 - 2012); and Director, Mellon Overseas Investment Corp. (financial services) (2009 - 2012) ------------------------------------------------------------------------------------------------------------------------------------ 74 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/16 Interested Trustee ------------------------------------------------------------------------------------------------------------------------------------ Name, Age and Term of Office and Other Directorships Position Held with the Fund Length of Service Principal Occupation Held by Trustee ------------------------------------------------------------------------------------------------------------------------------------ Kenneth J. Taubes (58)* Trustee since 2014. Serves Director and Executive Vice President (since None Trustee until a successor trustee 2008) and Chief Investment Officer, U.S. is elected or earlier (since 2010) of PIM-USA; Executive Vice retirement or removal. President of Pioneer (since 2008); Executive Vice President of Pioneer Institutional Asset Management, Inc. (since 2009); and Portfolio Manager of Pioneer (since 1999) ------------------------------------------------------------------------------------------------------------------------------------ * Mr. Taubes is an Interested Trustee because he is an officer of the Fund's investment adviser and certain of its affiliates. Pioneer Multi-Asset Income Fund | Annual Report | 7/31/16 75 Advisory Trustee ------------------------------------------------------------------------------------------------------------------------------------ Name, Age and Term of Office and Other Directorships Position Held with the Fund Length of Service Principal Occupation Held by Trustee ------------------------------------------------------------------------------------------------------------------------------------ Lorraine Monchak (60)** Advisory Trustee since 2014. Chief Investment Officer, 1199 SEIU Funds Trustee of Pioneer Advisory Trustee (healthcare workers union pension funds) closed-end investment (2001 - present); Vice President - investment companies (5 International Investments Group, American portfolios) (Sept. 2015 - International Group, Inc. (insurance present) 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) ------------------------------------------------------------------------------------------------------------------------------------ ** Ms. Monchak is a non-voting advisory trustee. 76 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/16 Fund Officers ------------------------------------------------------------------------------------------------------------------------------------ Name, Age and Term of Office and Other Directorships Position Held with the Fund Length of Service Principal Occupation Held by Officer ------------------------------------------------------------------------------------------------------------------------------------ Lisa M. Jones (54) Since 2014. Serves at the Chair, Director, CEO and President of Trustee of Pioneer President and discretion of the Board. Pioneer Investment Management-USA (since closed-end investment Chief Executive Officer September 2014); Chair, Director, CEO and companies (5 portfolios) President of Pioneer Investment Management, (Sept. 2015 - present) Inc. (since September 2014); Chair, Director, CEO and President of Pioneer Funds Distributor, Inc. (since September 2014); Chair, Director, CEO and President of Pioneer Institutional Asset Management, Inc. (since September 2014); and Chair, Director, and CEO of Pioneer Investment Management Shareholder Services, Inc. (since September 2014); Managing Director, Morgan Stanley Investment Management (2010 - 2013); and Director of Institutional Business, CEO of International, Eaton Vance Management (2005 - 2010) ------------------------------------------------------------------------------------------------------------------------------------ Christopher J. Kelley (51) Since 2011. Serves at the Vice President and Associate General Counsel None Secretary and discretion of the Board. of Pioneer since January 2008; Secretary and Chief Legal Officer 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 Pioneer from July 2002 to December 2007 ------------------------------------------------------------------------------------------------------------------------------------ Carol B. Hannigan (55) Since 2011. Serves at the Fund Governance Director of Pioneer since None Assistant Secretary discretion of the Board. December 2006 and Assistant Secretary of all the Pioneer Funds since June 2010; Manager - Fund Governance of Pioneer from December 2003 to November 2006; and Senior Paralegal of Pioneer from January 2000 to November 2003 ------------------------------------------------------------------------------------------------------------------------------------ Thomas Reyes (53) Since 2011. Serves at the Senior Counsel of Pioneer since May 2013 and None Assistant Secretary discretion of the Board. Assistant Secretary of all the Pioneer Funds since June 2010; and Counsel of Pioneer from June 2007 to May 2013 ------------------------------------------------------------------------------------------------------------------------------------ Mark E. Bradley (56) Since 2011. Serves at the Vice President - Fund Treasury of Pioneer; None Treasurer and Chief discretion of the Board. Treasurer of all of the Pioneer Funds since Financial March 2008; Deputy Treasurer of Pioneer from and Accounting Officer March 2004 to February 2008; and Assistant Treasurer of all of the Pioneer Funds from March 2004 to February 2008 ------------------------------------------------------------------------------------------------------------------------------------ Pioneer Multi-Asset Income Fund | Annual Report | 7/31/16 77 Fund Officers (continued) ------------------------------------------------------------------------------------------------------------------------------------ Name, Age and Term of Office and Other Directorships Position Held with the Fund Length of Service Principal Occupation Held by Officer ------------------------------------------------------------------------------------------------------------------------------------ Luis I. Presutti (51) Since 2011. Serves at the Director - Fund Treasury of Pioneer; and None Assistant Treasurer discretion of the Board. Assistant Treasurer of all of the Pioneer Funds ------------------------------------------------------------------------------------------------------------------------------------ Gary Sullivan (58) Since 2011. Serves at the Fund Accounting Manager - Fund Treasury of None Assistant Treasurer discretion of the Board. Pioneer; and Assistant Treasurer of all of the Pioneer Funds ------------------------------------------------------------------------------------------------------------------------------------ David F. Johnson (36) Since 2011. Serves at the Fund Administration Manager - Fund Treasury None Assistant Treasurer discretion of the Board. of Pioneer since November 2008; 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 ------------------------------------------------------------------------------------------------------------------------------------ Jean M. Bradley (63) Since 2011. Serves at the Chief Compliance Officer of Pioneer and of None Chief Compliance Officer discretion of the Board. all the Pioneer Funds since March 2010; Chief Compliance Officer of Pioneer Institutional Asset Management, Inc. since January 2012; Chief Compliance Officer of Vanderbilt Capital Advisors, LLC since July 2012: Director of Adviser and Portfolio Compliance at Pioneer since October 2005; and Senior Compliance Officer for Columbia Management Advisers, Inc. from October 2003 to October 2005 ------------------------------------------------------------------------------------------------------------------------------------ Kelly O'Donnell (45) Since 2011. Serves at the Director - Transfer Agency Compliance of None Anti-Money Laundering discretion of the Board. Pioneer and Anti-Money Laundering Officer of Officer all the Pioneer Funds since 2006 ------------------------------------------------------------------------------------------------------------------------------------ 78 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/16 This page for your notes. Pioneer Multi-Asset Income Fund | Annual Report | 7/31/16 79 This page for your notes. 80 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/16 This page for your notes. Pioneer Multi-Asset Income Fund | Annual Report | 7/31/16 81 This page for your notes. 82 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/16 This page for your notes. Pioneer Multi-Asset Income Fund | Annual Report | 7/31/16 83 This page for your notes. 84 Pioneer Multi-Asset Income Fund | Annual Report | 7/31/16 How to Contact Pioneer We are pleased to offer a variety of convenient ways for you to contact us for assistance or information. Call us for: -------------------------------------------------------------------------------- Account Information, including existing accounts, new accounts, prospectuses, applications and service forms 1-800-225-6292 FactFone(SM) for automated fund yields, prices, account information and transactions 1-800-225-4321 Retirement plans information 1-800-622-0176 Write to us: -------------------------------------------------------------------------------- Pioneer Funds P.O. Box 55014 Boston, Massachusetts 02205-5014 Our toll-free fax 1-800-225-4240 Our internet e-mail address ask.pioneer@pioneerinvestments.com (for general questions about Pioneer only) Visit our web site: us.pioneerinvestments.com This report must be preceded or accompanied by a prospectus. The Fund files a complete schedule of investments with the Securities and Exchange Commission for the first and third quarters for each fiscal year on Form N-Q. Shareholders may view the filed Form N-Q by visiting the Commission's web site at http://www.sec.gov. The filed form may also be viewed and copied at the Commission's Public Reference Room in Washington, DC. Information regarding the operations of the Public Reference Room may be obtained by calling 1-800-SEC-0330. [LOGO] PIONEER Investments(R) Pioneer Investment Management, Inc. 60 State Street Boston, MA 02109 us.pioneerinvestments.com Securities offered through Pioneer Funds Distributor, Inc. 60 State Street, Boston, MA 02109 Underwriter of Pioneer Mutual Funds, Member SIPC (C) 2016 Pioneer Investments 25962-04-0916 ITEM 2. CODE OF ETHICS. (a) Disclose whether, as of the end of the period covered by the report, the registrant has adopted a code of ethics that applies to the registrant's principal executive officer, principal financial officer, principal accounting officer or controller, or persons performing similar functions, regardless of whether these individuals are employed by the registrant or a third party. If the registrant has not adopted such a code of ethics, explain why it has not done so. The registrant has adopted, as of the end of the period covered by this report, a code of ethics that applies to the registrant's principal executive officer, principal financial officer, principal accounting officer and controller. (b) For purposes of this Item, the term "code of ethics" means written standards that are reasonably designed to deter wrongdoing and to promote: (1) Honest and ethical conduct, including the ethical handling of actual or apparent conflicts of interest between personal and professional relationships; (2) Full, fair, accurate, timely, and understandable disclosure in reports and documents that a registrant files with, or submits to, the Commission and in other public communications made by the registrant; (3) Compliance with applicable governmental laws, rules, and regulations; (4) The prompt internal reporting of violations of the code to an appropriate person or persons identified in the code; and (5) Accountability for adherence to the code. (c) The registrant must briefly describe the nature of any amendment, during the period covered by the report, to a provision of its code of ethics that applies to the registrant's principal executive officer, principal financial officer, principal accounting officer or controller, or persons performing similar functions, regardless of whether these individuals are employed by the registrant or a third party, and that relates to any element of the code of ethics definition enumerated in paragraph (b) of this Item. The registrant must file a copy of any such amendment as an exhibit pursuant to Item 10(a), unless the registrant has elected to satisfy paragraph (f) of this Item by posting its code of ethics on its website pursuant to paragraph (f)(2) of this Item, or by undertaking to provide its code of ethics to any person without charge, upon request, pursuant to paragraph (f)(3) of this Item. The registrant has made no amendments to the code of ethics during the period covered by this report. (d) If the registrant has, during the period covered by the report, granted a waiver, including an implicit waiver, from a provision of the code of ethics to the registrant's principal executive officer, principal financial officer, principal accounting officer or controller, or persons performing similar functions, regardless of whether these individuals are employed by the registrant or a third party, that relates to one or more of the items set forth in paragraph (b) of this Item, the registrant must briefly describe the nature of the waiver, the name of the person to whom the waiver was granted, and the date of the waiver. Not applicable. (e) If the registrant intends to satisfy the disclosure requirement under paragraph (c) or (d) of this Item regarding an amendment to, or a waiver from, a provision of its code of ethics that applies to the registrant's principal executive officer, principal financial officer, principal accounting officer or controller, or persons performing similar functions and that relates to any element of the code of ethics definition enumerated in paragraph (b) of this Item by posting such information on its Internet website, disclose the registrant's Internet address and such intention. Not applicable. (f) The registrant must: (1) File with the Commission, pursuant to Item 12(a)(1), a copy of its code of ethics that applies to the registrant's principal executive officer,principal financial officer, principal accounting officer or controller, or persons performing similar functions, as an exhibit to its annual report on this Form N-CSR (see attachment); (2) Post the text of such code of ethics on its Internet website and disclose, in its most recent report on this Form N-CSR, its Internet address and the fact that it has posted such code of ethics on its Internet website; or (3) Undertake in its most recent report on this Form N-CSR to provide to any person without charge, upon request, a copy of such code of ethics and explain the manner in which such request may be made. 	See Item 10(2) ITEM 3. AUDIT COMMITTEE FINANCIAL EXPERT. (a) (1) Disclose that the registrant's board of trustees has determined that the registrant either: (i) Has at least one audit committee financial expert serving on its audit committee; or (ii) Does not have an audit committee financial expert serving on its audit committee. The registrant's Board of Trustees has determined that the registrant has at least one audit committee financial expert. (2) If the registrant provides the disclosure required by paragraph (a)(1)(i) of this Item, it must disclose the name of the audit committee financial expert and whether that person is "independent." In order to be considered "independent" for purposes of this Item, a member of an audit committee may not, other than in his or her capacity as a member of the audit committee, the board of trustees, or any other board committee: (i) Accept directly or indirectly any consulting, advisory, or other compensatory fee from the issuer; or (ii) Be an "interested person" of the investment company as defined in Section 2(a)(19) of the Act (15 U.S.C. 80a-2(a)(19)). Ms. Marguerite A. Piret, an independent trustee, is such an audit committee financial expert. (3) If the registrant provides the disclosure required by paragraph (a)(1) (ii) of this Item, it must explain why it does not have an audit committee financial expert. Not applicable. ITEM 4. PRINCIPAL ACCOUNTANT FEES AND SERVICES. (a) Disclose, under the caption AUDIT FEES, the aggregate fees billed for each of the last two fiscal years for professional services rendered by the principal accountant for the audit of the registrant's annual financial statements or services that are normally provided by the accountant in connection with statutory and regulatory filings or engagements for those fiscal years. The audit fees for the Trust were $91,957 payable to Deloitte & Touche LLP for the year ended July 31, 2016 and $130,877 for the year ended July 31, 2015. (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 2016 or 2015. (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 $17,556 payable to Deloitte & Touche LLP for the year ended July 31, 2016 and $24,600 for the year ended July 31, 2015. (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 audit-related services in 2016 or 2015. (e) (1) Disclose the audit committee's pre-approval policies and procedures described in paragraph (c)(7) of Rule 2-01 of Regulation S-X. PIONEER FUNDS APPROVAL OF AUDIT, AUDIT-RELATED, TAX AND OTHER SERVICES PROVIDED BY THE INDEPENDENT AUDITOR SECTION I - POLICY PURPOSE AND APPLICABILITY The Pioneer Funds recognize the importance of maintaining the independence of their outside auditors. Maintaining independence is a shared responsibility involving Pioneer Investment Management, Inc ("PIM"), the audit committee and the independent auditors. The Funds recognize that a Fund's independent auditors: 1) possess knowledge of the Funds, 2) are able to incorporate certain services into the scope of the audit, thereby avoiding redundant work, cost and disruption of Fund personnel and processes, and 3) have expertise that has value to the Funds. As a result, there are situations where it is desirable to use the Fund's independent auditors for services in addition to the annual audit and where the potential for conflicts of interests are minimal. Consequently, this policy, which is intended to comply with Rule 210.2-01(C)(7), sets forth guidelines and procedures to be followed by the Funds when retaining the independent audit firm to perform audit, audit-related tax and other services under those circumstances, while also maintaining independence. Approval of a service in accordance with this policy for a Fund shall also constitute approval for any other Fund whose pre-approval is required pursuant to Rule 210.2-01(c)(7)(ii). In addition to the procedures set forth in this policy, any non-audit services that may be provided consistently with Rule 210.2-01 may be approved by the Audit Committee itself and any pre-approval that may be waived in accordance with Rule 210.2-01(c)(7)(i)(C) is hereby waived. Selection of a Fund's independent auditors and their compensation shall be determined by the Audit Committee and shall not be subject to this policy. SECTION II - POLICY ---------------- -------------------------------- ------------------------------------------------- SERVICE SERVICE CATEGORY DESCRIPTION SPECIFIC PRE-APPROVED SERVICE SUBCATEGORIES CATEGORY ---------------- -------------------------------- ------------------------------------------------- I. AUDIT Services that are directly o Accounting research assistance SERVICES related to performing the o SEC consultation, registration independent audit of the Funds statements, and reporting o Tax accrual related matters o Implementation of new accounting standards o Compliance letters (e.g. rating agency letters) o Regulatory reviews and assistance regarding financial matters o Semi-annual reviews (if requested) o Comfort letters for closed end offerings ---------------- -------------------------------- ------------------------------------------------- II. Services which are not o AICPA attest and agreed-upon procedures AUDIT-RELATED prohibited under Rule o Technology control assessments SERVICES 210.2-01(C)(4) (the "Rule") o Financial reporting control assessments and are related extensions of o Enterprise security architecture the audit services support the assessment audit, or use the knowledge/expertise gained from the audit procedures as a foundation to complete the project. In most cases, if the Audit-Related Services are not performed by the Audit firm, the scope of the Audit Services would likely increase. The Services are typically well-defined and governed by accounting professional standards (AICPA, SEC, etc.) ---------------- -------------------------------- ------------------------------------------------- ------------------------------------- ------------------------------------ AUDIT COMMITTEE APPROVAL POLICY AUDIT COMMITTEE REPORTING POLICY ------------------------------------- ------------------------------------ o "One-time" pre-approval o A summary of all such for the audit period for all services and related fees pre-approved specific service reported at each regularly subcategories. Approval of the scheduled Audit Committee independent auditors as meeting. auditors for a Fund shall constitute pre approval for these services. ------------------------------------- ------------------------------------ o "One-time" pre-approval o A summary of all such for the fund fiscal year within services and related fees a specified dollar limit (including comparison to for all pre-approved specified dollar limits) specific service subcategories reported quarterly. o Specific approval is needed to exceed the pre-approved dollar limit for these services (see general Audit Committee approval policy below for details on obtaining specific approvals) o Specific approval is needed to use the Fund's auditors for Audit-Related Services not denoted as "pre-approved", or to add a specific service subcategory as "pre-approved" ------------------------------------- ------------------------------------ SECTION III - POLICY DETAIL, CONTINUED ----------------------- --------------------------- ----------------------------------------------- SERVICE CATEGORY SERVICE CATEGORY SPECIFIC PRE-APPROVED SERVICE SUBCATEGORIES DESCRIPTION ----------------------- --------------------------- ----------------------------------------------- III. TAX SERVICES Services which are not o Tax planning and support prohibited by the Rule, o Tax controversy assistance if an officer of the Fund o Tax compliance, tax returns, excise determines that using the tax returns and support Fund's auditor to provide o Tax opinions these services creates significant synergy in the form of efficiency, minimized disruption, or the ability to maintain a desired level of confidentiality. ----------------------- --------------------------- ----------------------------------------------- ------------------------------------- ------------------------- AUDIT COMMITTEE APPROVAL POLICY AUDIT COMMITTEE REPORTING POLICY ------------------------------------- ------------------------- ------------------------------------- ------------------------- o "One-time" pre-approval o A summary of for the fund fiscal year all such services and within a specified dollar limit related fees 				 (including comparison 			 to specified dollar 			 limits) reported 			 quarterly. o Specific approval is needed to exceed the pre-approved dollar limits for these services (see general Audit Committee approval policy below for details on obtaining specific approvals) o Specific approval is needed to use the Fund's auditors for tax services not denoted as pre-approved, or to add a specific service subcategory as "pre-approved" ------------------------------------- ------------------------- SECTION III - POLICY DETAIL, CONTINUED ----------------------- --------------------------- ----------------------------------------------- SERVICE CATEGORY SERVICE CATEGORY SPECIFIC PRE-APPROVED SERVICE SUBCATEGORIES DESCRIPTION ----------------------- --------------------------- ----------------------------------------------- IV. OTHER SERVICES Services which are not o Business Risk Management support prohibited by the Rule, o Other control and regulatory A. SYNERGISTIC, if an officer of the Fund compliance projects UNIQUE QUALIFICATIONS determines that using the Fund's auditor to provide these services creates significant synergy in the form of efficiency, minimized disruption, the ability to maintain a desired level of confidentiality, or where the Fund's auditors posses unique or superior qualifications to provide these services, resulting in superior value and results for the Fund. ----------------------- --------------------------- ----------------------------------------------- --------------------------------------- ------------------------ AUDIT COMMITTEE APPROVAL POLICY AUDIT COMMITTEE REPORTING POLICY ------------------------------------- -------------------------- o "One-time" pre-approval o A summary of for the fund fiscal year within all such services and a specified dollar limit related fees 			 (including comparison 			 to specified dollar 				 limits) reported quarterly. o Specific approval is needed to exceed the pre-approved dollar limits for these services (see general Audit Committee approval policy below for details on obtaining specific approvals) o Specific approval is needed to use the Fund's auditors for "Synergistic" or "Unique Qualifications" Other Services not denoted as pre-approved to the left, or to add a specific service subcategory as "pre-approved" ------------------------------------- -------------------------- SECTION III - POLICY DETAIL, CONTINUED ----------------------- ------------------------- ----------------------------------------------- SERVICE CATEGORY SERVICE CATEGORY SPECIFIC PROHIBITED SERVICE SUBCATEGORIES DESCRIPTION ----------------------- ------------------------- ----------------------------------------------- PROHIBITED SERVICES Services which result 1. Bookkeeping or other services in the auditors losing related to the accounting records or independence status financial statements of the audit under the Rule. client* 2. Financial information systems design and implementation* 3. Appraisal or valuation services, fairness* opinions, or contribution-in-kind reports 4. Actuarial services (i.e., setting actuarial reserves versus actuarial audit work)* 5. Internal audit outsourcing services* 6. Management functions or human resources 7. Broker or dealer, investment advisor, or investment banking services 8. Legal services and expert services unrelated to the audit 9. Any other service that the Public Company Accounting Oversight Board determines, by regulation, is impermissible ----------------------- ------------------------- ----------------------------------------------- ------------------------------------------- ------------------------------ AUDIT COMMITTEE APPROVAL POLICY AUDIT COMMITTEE REPORTING POLICY ------------------------------------------- ------------------------------ o These services are not to be o A summary of all performed with the exception of the(*) services and related services that may be permitted fees reported at each if they would not be subject to audit regularly scheduled procedures at the audit client (as Audit Committee meeting defined in rule 2-01(f)(4)) level will serve as continual the firm providing the service. confirmation that has 				 not provided any restricted services. ------------------------------------------- ------------------------------ -------------------------------------------------------------------------------- GENERAL AUDIT COMMITTEE APPROVAL POLICY: o For all projects, the officers of the Funds and the Fund's auditors will each make an assessment to determine that any proposed projects will not impair independence. o Potential services will be classified into the four non-restricted service categories and the "Approval of Audit, Audit-Related, Tax and Other Services" Policy above will be applied. Any services outside the specific pre-approved service subcategories set forth above must be specifically approved by the Audit Committee. o At least quarterly, the Audit Committee shall review a report summarizing the services by service category, including fees, provided by the Audit firm as set forth in the above policy. -------------------------------------------------------------------------------- (2) Disclose the percentage of services described in each of paragraphs (b) through (d) of this Item that were approved by the audit committee pursuant to paragraph (c)(7)(i)(C) of Rule 2-01 of Regulation S-X. Non-Audit Services Beginning with non-audit service contracts entered into on or after May 6, 2003, the effective date of the new SEC pre-approval rules, the Trust's audit committee is required to pre-approve services to affiliates defined by SEC rules to the extent that the services are determined to have a direct impact on the operations or financial reporting of the Trust. For the years ended July 31 2016 and 2015, 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 $17,556 payable to Deloitte & Touche LLP for the year ended July 31, 2016 and $24,600 for the year ended July 31, 2015. (h) Disclose whether the registrants audit committee of the board of trustees has considered whether the provision of non-audit services that were rendered to the registrants investment adviser (not including any subadviser whose role is primarily portfolio management and is subcontracted with or overseen by another investment adviser), and any entity controlling, controlled by, or under common control with the investment adviser that provides ongoing services to the registrant that were not pre-approved pursuant to paragraph (c)(7)(ii) of Rule 2-01 of Regulation S-X is compatible with maintaining the principal accountant's independence. The Fund's audit committee of the Board of Trustees has considered whether the provision of non-audit services that were rendered to the Affiliates (as defined) that were not pre- approved pursuant to paragraph (c)(7)(ii) of Rule 2-01 of Regulation S-X is compatible with maintaining the principal accountant's independence. ITEM 5. AUDIT COMMITTEE OF LISTED REGISTRANTS (a) If the registrant is a listed issuer as defined in Rule 10A-3 under the Exchange Act (17 CFR 240.10A-3), state whether or not the registrant has a separately-designated standing audit committee established in accordance with Section 3(a)(58)(A) of the Exchange Act (15 U.S.C. 78c(a)(58)(A)). If the registrant has such a committee, however designated, identify each committee member. If the entire board of directors is acting as the registrant's audit committee as specified in Section 3(a)(58)(B) of the Exchange Act (15 U.S.C. 78c(a)(58)(B)), so state. N/A (b) If applicable, provide the disclosure required by Rule 10A-3(d) under the Exchange Act (17 CFR 240.10A-3(d)) regarding an exemption from the listing standards for audit committees. N/A ITEM 6. SCHEDULE OF INVESTMENTS. File Schedule of Investments in securities of unaffiliated issuers as of the close of the reporting period as set forth in 210.1212 of Regulation S-X [17 CFR 210.12-12], unless the schedule is included as part of the report to shareholders filed under Item 1 of this Form. Included in Item 1 ITEM 7. DISCLOSURE OF PROXY VOTING POLICIES AND PROCEDURES FOR CLOSED-END MANAGEMENT INVESTMENT COMPANIES. A closed-end management investment company that is filing an annual report on this Form N-CSR must, unless it invests exclusively in non-voting securities, describe the policies and procedures that it uses to determine how to vote proxies relating to portfolio securities, including the procedures that the company uses when a vote presents a conflict between the interests of its shareholders, on the one hand, and those of the company's investment adviser; principal underwriter; or any affiliated person (as defined in Section 2(a)(3) of the Investment Company Act of 1940 (15 U.S.C. 80a-2(a)(3)) and the rules thereunder) of the company, its investment adviser, or its principal underwriter, on the other. Include any policies and procedures of the company's investment adviser, or any other third party, that the company uses, or that are used on the company's behalf, to determine how to vote proxies relating to portfolio securities. Not applicable to open-end management investment companies. ITEM 8. PORTFOLIO MANAGERS OF CLOSED-END MANAGEMENT INVESTMENT COMPANIES. (a) If the registrant is a closed-end management investment company that is filing an annual report on this Form N-CSR,provide the following information: (1) State the name, title, and length of service of the person or persons employed by or associated with the registrant or an investment adviser of the registrant who are primarily responsible for the day-to-day management of the registrant's portfolio ("Portfolio Manager"). Also state each Portfolio Manager's business experience during the past 5 years. Not applicable to open-end management investment companies. ITEM 9. PURCHASES OF EQUITY SECURITIES BY CLOSED-END MANAGEMENT INVESTMENT COMPANY AND AFFILIATED PURCHASERS. (a) If the registrant is a closed-end management investment company, in the following tabular format, provide the information specified in paragraph (b) of this Item with respect to any purchase made by or on behalf of the registrant or any affiliated purchaser, as defined in Rule 10b-18(a)(3) under the Exchange Act (17 CFR 240.10b-18(a)(3)), of shares or other units of any class of the registrant's equity securities that is registered by the registrant pursuant to Section 12 of the Exchange Act (15 U.S.C. 781). Not applicable to open-end management investment companies. ITEM 10. SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS. Describe any material changes to the procedures by which shareholders may recommend nominees to the registrant's board of directors, where those changes were implemented after the registrant last provided disclosure in response to the requirements of Item 407(c)(2)(iv) of Regulation S-R(17 CFR 229.407)(as required by Item 22(b)(15)) of Schedule 14A (17 CFR 240.14a-101), or this Item. There have been no material changes to the procedures by which the shareholders may recommend nominees to the registrant's board of directors since the registrant last provided disclosure in response to the requirements of Item 407(c)(2)(iv) of Regulation S-R of Schedule 14(A) in its definitive proxy statement, or this item. ITEM 11. CONTROLS AND PROCEDURES. (a) Disclose the conclusions of the registrant's principal executive and principal financials officers, or persons performing similar functions, regarding the effectiveness of the registrant's disclosure controls and procedures (as defined in Rule 30a-3(c) under the Act (17 CFR 270.30a-3(c))) as of a date within 90 days of the filing date of the report that includes the disclosure required by this paragraph, based on the evaluation of these controls and procedures required by Rule 30a-3(b) under the Act (17 CFR 270.30(a)-3(b) and Rules 13a-15(b) or 15d-15(b) under the Exchange Act (17 CFR 240.13a-15(b) or 240.15d-15(b)). The registrant's principal executive officer and principal financial officer have concluded that the registrant's disclosure controls and procedures are effective based on the evaluation of these controls and procedures as of a date within 90 days of the filing date of this report. (b) Disclose any change in the registrant's internal control over financial reporting (as defined in Rule 30a-3(d) under the Act (17CFR 270.30a-3(d)) that occured during the second fiscal quarter of the period covered by this report that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting. There were no significant changes in the registrant's internal control over financial reporting that occurred during the second fiscal quarter of the period covered by this report that have materially affected, or are reasonably likely to materially affect, the registrant's internal control over financial reporting. The registrant's principal executive officer and principal financial officer, however, voluntarily are reporting the following information: In August of 2006 the registrant's investment adviser enhanced its internal procedures for reporting performance information required to be included in prospectuses. Those enhancements involved additional internal controls over the appropriateness of performance data generated for this purpose. Such enhancements were made following an internal review which identified prospectuses relating to certain classes of shares of a limited number of registrants where, inadvertently, performance information not reflecting the deduction of applicable sales charges was included. Those prospectuses were revised, and the revised prospectuses were distributed to shareholders. ITEM 12. EXHIBITS. (a) File the exhibits listed below as part of this Form. Letter or number the exhibits in the sequence indicated. (1) Any code of ethics, or amendment thereto, that is the subject of the disclosure required by Item 2, to the extent that the registrant intends to satisfy the Item 2 requirements through filing of an exhibit. (2) A separate certification for each principal executive officer and principal financial officer of the registrant as required by Rule 30a-2(a) under the Act (17 CFR 270.30a-2(a)) , exactly as set forth below: Filed herewith. SIGNATURES [See General Instruction F] Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. (Registrant) Pioneer Series Trust IV By (Signature and Title)* /s/ Lisa M. Jones Lisa M. Jones, President & Chief Executive Officer Date September 29, 2016 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 September 29, 2016 By (Signature and Title)* /s/ Mark E. Bradley Mark E. Bradley, Treasurer & Chief Accounting & Financial Officer Date September 29, 2016 * Print the name and title of each signing officer under his or her signature.