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 811-21664 Pioneer Series Trust III (Exact name of registrant as specified in charter) 60 State Street, Boston, MA 02109 (Address of principal executive offices) (ZIP code) Terrence J. Cullen, Amundi Pioneer Asset Management, Inc., 60 State Street, Boston, MA 02109 (Name and address of agent for service) Registrant's telephone number, including area code: (617) 742-7825 Date of fiscal year end: August 31, 2019 Date of reporting period: September 1, 2018 through August 31, 2019 Form N-CSR is to be used by management investment companies to file reports with the Commission not later than 10 days after the transmission to stockholders of any report that is required to be transmitted to stockholders under Rule 30e-1 under the Investment Company Act of 1940 (17 CFR 270.30e-1). The Commission may use the information provided on Form N-CSR in its regulatory, disclosure review, inspection, and policymaking roles. A registrant is required to disclose the information specified by Form N-CSR, and the Commission will make this information public. A registrant is not required to respond to the collection of information contained in Form N-CSR unless the Form displays a currently valid Office of Management and Budget ("OMB") control number. Please direct comments concerning the accuracy of the information collection burden estimate and any suggestions for reducing the burden to Secretary, Securities and Exchange Commission, 450 Fifth Street, NW, Washington, DC 20549-0609. The OMB has reviewed this collection of information under the clearance requirements of 44 U.S.C. ss. 3507. ITEM 1. REPORTS TO STOCKHOLDERS. Pioneer Disciplined Value Fund -------------------------------------------------------------------------------- Annual Report | August 31, 2019 -------------------------------------------------------------------------------- Ticker Symbols: Class A CVFCX Class C CVCFX Class R CVRFX Class Y CVFYX Beginning in February 2021, as permitted by regulations adopted by the Securities and Exchange Commission, paper copies of the Fund's shareholder reports like this one will no longer be sent by mail, unless you specifically request paper copies of the reports from the Fund or from your financial intermediary, such as a broker-dealer, bank or insurance company. Instead, the reports will be made available on the Fund's website, and you will be notified by mail each time a report is posted and provided with a website link to access the report. If you already elected to receive shareholder reports electronically, you will not be affected by this change and you need not take any action. You may elect to receive shareholder reports and other communications electronically by contacting your financial intermediary or, if you invest directly with the Fund, by calling 1-800-225-6292. You may elect to receive all future reports in paper free of charge. If you invest directly with the Fund, you can inform the Fund that you wish to continue receiving paper copies of your shareholder reports by calling 1-800-225-6292. If you invest through a financial intermediary, you can contact your financial intermediary to request that you continue to receive paper copies of your shareholder reports. Your election to receive reports in paper will apply to all funds held in your account if you invest through your financial intermediary or all funds held within the Pioneer Fund complex if you invest directly. [LOGO] Amundi Pioneer ============== ASSET MANAGEMENT visit us: www.amundipioneer.com/us Table of Contents President's Letter 2 Portfolio Management Discussion 4 Portfolio Summary 10 Prices and Distributions 11 Performance Update 12 Comparing Ongoing Fund Expenses 16 Schedule of Investments 18 Financial Statements 23 Notes to Financial Statements 31 Report of Independent Registered Public Accounting Firm 39 Additional Information 41 Trustees, Officers and Service Providers 42 Pioneer Disciplined Value Fund | Annual Report | 8/31/19 1 President's Letter Since 1928, active portfolio management based on in-depth, fundamental research, has been the foundation of Amundi Pioneer's investment approach. We believe an active management investment strategy is a prudent approach to investing, especially during periods of market volatility, which can result from any number of risk factors, including slow U.S. economic growth, rising interest rates, and geopolitical factors. Of course, in today's global economy, risk factors extend well beyond U.S. borders. In fact, it's not unusual for political and economic issues on the international front to cause or contribute to volatility in U.S. markets. At Amundi Pioneer, each security under consideration is researched by our team of experienced investment professionals, who communicate directly with the management teams of those companies. At the end of this research process, if we have conviction in a company's business model and management team, and regard the security as a potentially solid investment opportunity, an Amundi Pioneer portfolio manager makes an active decision to invest in that security. The portfolio resulting from these decisions represents an expression of his or her convictions, and strives to balance overall risk and return opportunity. As an example, the Standard & Poor's 500 Index -- the predominant benchmark for many U.S. Large-Cap Core Equity funds -- has 500 stocks. An Amundi Pioneer portfolio manager chooses to invest in only those companies that he or she believes can offer the most attractive opportunities to pursue the fund's investment objective, thus potentially benefiting the fund's shareowners. This process results in a portfolio that does not own all 500 stocks, but a much narrower universe. The same active decision to invest in a company is also applied when we decide to sell a security, due to changing fundamentals, valuation concerns, or market risks. We apply this active decision-making across all of our equity, fixed-income, and global portfolios. Today, as investors, we have many options. It is our view that active management can serve shareholders well not only when markets are thriving, but also during periods of market volatility and uncertainty, thus making it a compelling investment choice. As you consider the many choices today, we encourage you to work with your financial advisor to develop an overall investment plan that addresses both your short- and long-term goals, and to implement such a plan in a disciplined manner. 2 Pioneer Disciplined Value Fund | Annual Report | 8/31/19 We greatly appreciate the trust you have placed in us and look forward to continuing to serve you in the future. Sincerely, /s/ Lisa M. Jones Lisa M. Jones Head of the Americas, President and CEO of U.S. Amundi Pioneer Asset Management USA, Inc. August 31, 2019 Any information in this shareowner report regarding market or economic trends or the factors influencing the Fund's historical or future performance are statements of opinion as of the date of this report. Past performance is no guarantee of future results. Pioneer Disciplined Value Fund | Annual Report | 8/31/19 3 Portfolio Management Discussion | 8/31/19 In the following interview, Craig Sterling discusses the factors that affected the performance of Pioneer Disciplined Value Fund during the 12-month period ended August 31, 2019. Mr. Sterling, Managing Director, Director of Core Equity, Head of Equity Research, U.S., and a portfolio manager at Amundi Pioneer Asset Management, Inc. (Amundi Pioneer), is responsible for day-to-day management of the Fund's investment portfolio, along with Ashesh ("Ace") Savla, a vice president, Team Leader of U.S. Equity Quantitative Research, and a portfolio manager at Amundi Pioneer. Q How did the Fund perform during the 12-month period ended August 31, 2019? A Pioneer Disciplined Value Fund's Class A shares returned -1.63% at net asset value during the 12-month period ended August 31, 2019, while the Fund's benchmark, the Russell 1000 Value Index, returned 0.62%. During the same period, the average return of the 1,382 mutual funds in Morningstar's Large Value Funds category was -1.41%. Q How would you describe the market environment for investors over the 12-month period ended August 31, 2019? A Entering the period, robust economic data and corporate earnings results boosted market sentiment for riskier assets, outweighing concerns over trade disputes between the U.S. and some of its key partners. The U.S. Federal Reserve ("Fed") raised interest rates for a third time in 2018 at its September meeting, but equities continued to move higher and the market performed well through the end of the third quarter. Conditions reversed in the fourth quarter of 2018, however, and it proved to be one of the most challenging three-month periods for investors in roughly a decade. A number of issues converged to produce poor returns for equities heading into the end of the calendar year, including escalating trade tensions between the U.S. and China as well as concerns that the Fed would "overshoot" and raise interest rates too high after doing so again in December, the fourth rate increase in 2018. Investor sentiment rebounded in January 2019 as Fed Chairman Powell indicated that interest-rate policy (that is, continued increases) was not on a fixed course. Later, the Fed issued another statement announcing that it was prepared to be "patient" on further rate hikes, given "muted inflation pressures." In addition, positive employment and manufacturing data helped boost risk sentiment at the beginning of the 2019 calendar year. 4 Pioneer Disciplined Value Fund | Annual Report | 8/31/19 Despite some interim volatility, riskier assets generally maintained a firm tone through the end of April 2019. In May, however, President Trump's announcement of plans to institute a 25% tariff on approximately $200 billion worth of Chinese goods led to another brief market downturn, as it became clear that a comprehensive trade deal between the two countries was not going to be easy to achieve. At that point, the Fed signaled a willingness to implement one or more cuts in the federal funds rate before the end of 2019, and later implemented a 0.25% rate reduction in July. The Fed's action on interest rates helped contribute to solid returns in the domestic equity markets over the final three months of the period. U.S. equity markets turned in positive, if unspectacular performance over the full 12-month period ended August 31, 2019. Value stocks, as measured by the Fund's benchmark, the Russell 1000 Value Index (the Russell Index), returned 0.62%, while growth stocks, as measured by the Russell 1000 Growth Index, returned 4.27%. Q Which of your investment decisions detracted from the Fund's benchmark-relative performance during the 12-month period ended August 31, 2019? A Energy and industrials were the two worst-performing sectors for the Fund versus the Russell Index over the 12-month period. The energy sector has been a tough place for investors in recent months, due to lower oil prices driven by oversupply and other factors. Not surprisingly, the portfolio's energy holdings struggled during the period, as the Fund does not own shares in any of the big integrated companies, which have weathered the storm better than other energy firms. Four of the five largest detractors from the Fund's benchmark-relative performance during the 12-month period were energy positions: EOG Resources, Halliburton, National Oilwell Varco, and Total SA. We had based our investment thesis for Halliburton, an oil & gas equipment services firm, on the company's historically strong and competitive position in the attractive (from their customers' point of view) U.S. market. However, some previously "low-end" competitors of Halliburton's have improved their ability to provide more high-value solutions, thus reducing the company's competitive advantage. That factor, combined with a poorer-than-expected spending environment from its target customer base, caused us to re-evaluate the investment case for Halliburton and led us to sell the stock from the portfolio. Within industrials, the Fund was overweight cyclical stocks -- or shares of companies that typically are more exposed to momentum swings in the economic cycle -- at the beginning of the period, and many of those stocks slumped dramatically during the fourth-quarter 2018 market correction. The stocks rebounded in the first quarter of 2019, and the Fund recovered a good portion of the earlier losses, but not enough to offset the declines from Pioneer Disciplined Value Fund | Annual Report | 8/31/19 5 the fourth quarter. Within industrials, the Fund's position in FedEx was a big detractor from benchmark-relative performance. FedEx struggled due to a poor first-quarter 2019 earnings report and full-year 2019 outlook. The company's recent difficulties caused us to rethink our original investment thesis and to exit the Fund's position. An underweight to utilities also detracted from the Fund's benchmark-relative performance over the 12-month period. We underweighted the portfolio to utilities and other so-called "bond proxy" stocks because valuations are simply too high. The Fund's underweight detracted from relative returns as the sector fared well during an uncertain interest-rate environment over the period. Q Which of your investment decisions benefited the Fund's benchmark-relative performance during the 12-month period ended August 31, 2019? A Stock selection in financials and materials, and stock selection plus an underweight to information technology were the main positive contributors to the Fund's benchmark-relative performance during the 12-month period. Within information technology, the portfolio's significant underweight when the late-2018 market correction occurred was a key positive contributor to benchmark-relative performance. Technology stock prices peaked around October 1, 2018, and the Fund was meaningfully underweight in the sector versus the Russell Index at that time, due to valuation concerns. Therefore, when the fourth-quarter correction happened, the Fund's large underweight benefited benchmark-relative returns. After the downturn when valuations were much improved, we increased the Fund's weighting, and by February 1, 2019, the portfolio was actually overweight in the sector versus the Russell Index. The overweight benefited the Fund's relative results when the sector rallied along with the rest of the equity market in early 2019. We then reduced the Fund's weighting when valuations began to swing back upward, and the portfolio was again meaningfully underweight to information technology by period-end. As for individual stocks, Fund positions that contributed positively to benchmark-relative performance during the 12-month period included Progressive (financials), Ball (materials), Apple (information technology), Home Depot (consumer discretionary), and Marsh & McLennan (financials). Progressive, the top individual positive contributor to the Fund's benchmark-relative returns for the period, is a leading provider of auto and homeowners insurance. The company has been able to use proprietary information technology more effectively than its peers, which has helped it generate strong returns while limiting loss volatility. We believe the market is just beginning to realize the growth potential and financial benefits Progressive could experience from combining auto and 6 Pioneer Disciplined Value Fund | Annual Report | 8/31/19 home products. In materials, the Fund's position in Ball contributed positively to benchmark-relative performance. Ball makes metal cans for beer and soda and other products, and it has benefited from the consumer backlash against single-use plastic bottles, as its share price was up significantly for the full 12-month period. Apple was another stock that aided the Fund's benchmark-relative returns over the 12-month period. The Fund did not own Apple back in October 2018, and that benefited benchmark-relative performance during the late-year market correction. We then established a position in Apple when the valuation improved, which aided relative returns when the market subsequently rallied. We reduced the Fund's position prior to period-end when the valuation moved higher, but still own shares of Apple in the portfolio. Home Depot, the home improvement retailer, also performed well for the Fund over the 12-month period. Thanks to its strong competitive position, healthy home values, and a buoyant consumer, Home Depot has continued to benefit from economies of scale, which has been evident in its rising profit margins and asset efficiency. Should the U.S. economy enter a slower growth period in the future, we believe this durable franchise would still have the potential to generate strong performance. Finally, Marsh & McLennan is the largest global insurance broker. We saw a lot of value in the company when we purchased the shares, and the decision aided the Fund's relative performance as the stock performed well over the 12-month period. Q Did you invest in any derivative securities during the 12-month period ended August 31, 2019? If so, did the derivatives have a material effect on the Fund's performance? A No, the Fund held no derivatives during the period. Q How is the Fund positioned heading into a new fiscal year? A As mentioned earlier, we find stocks in "bond proxy" sectors to be quite expensive, and so as of period-end, the Fund's largest sector underweight relative to the Russell Index was in utilities. The Fund remains underweight to energy, which continues to struggle. Furthermore, we find it difficult to foresee how companies in the sector, many of which we consider to be poorly run, will figure out how to deal with the difficult conditions in a way that creates economic value for shareholders. The portfolio's largest benchmark-relative overweight at period-end was in financials, as we believe there is a lot of value in the sector. To illustrate, one recent value-driven addition to the portfolio in the sector is a position in Berkshire Hathaway. We are especially positive on the banking sector, as we believe banks now have more stable business models than in the past, Pioneer Disciplined Value Fund | Annual Report | 8/31/19 7 and valuations are very good. Finally, the Fund is overweight to consumer discretionary, especially retail, as we remain positive on the condition of the U.S. consumer and we believe the retailers the Fund owns, such as Home Depot and TJX, can fare well in an e-commerce-driven world. Q What is your outlook for the remainder of 2019? A In early September, the market saw a sharp value rally as the relative-valuation spread versus growth/low-beta/momentum was at historic proportions, while investor sentiment was so negative that the risk of value stocks performing was to the upside. Put another way, at some point, valuations can become so depressed that negative fundamental developments, slowing earnings growth, trade conflicts, a decelerating economy, and other factors are more or less priced in to shares, and that if subsequent, incremental information releases are not as bad as feared, or perhaps even positive, then stock prices can react quite positively. The market was on this path at that time, but the value rally did not last, as a confluence of events in mid-September brought about new fears for investors to digest. The events included an attack on half of Saudi Arabia's oil facilities, an impeachment inquiry of President Trump, and a decelerating economy. Our general view and the Fund's resulting bottom-up positioning is that the risk for value is to the upside, as most market fears do seem priced in, and valuations for shares of quality, cyclical value companies is compelling. We will always seek to position the Fund where we find the most relative value, as that approach has tended to serve the Fund's investors well. While these views are current through the end of the 12-month period, information constantly and rapidly changes, given uncertainties about the global economy, trade conflicts, and the upcoming 2020 U.S. Presidential election. We continue to rely on the combination of our experienced fundamental analyst team and a proprietary corporate performance and valuation framework grounded in business-model economics, or economic value added ("EVA"). We believe those two key investment-process components are critical to the success of the Fund, given the evolving secular and cyclical shifts taking place in nearly every industry and the changing political and economic environments. 8 Pioneer Disciplined Value Fund | Annual Report | 8/31/19 Please refer to the Schedule of Investments on pages 18-22 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. The Fund may invest in fewer than 40 securities, and as a result, the Fund's performance may be more volatile than the performance of funds holding more securities. Investments in small- and mid-sized companies may offer the potential for higher returns, but are also subject to greater short-term price fluctuations than larger, more established companies. At times, the Fund's investments may represent industries or industry sectors that are interrelated or have common risks, making it more susceptible to any economic, political, or regulatory developments or other risks affecting those industries and sectors. These risks may increase share price volatility. Before investing, consider the product's investment objectives, risks, charges and expenses. Contact your advisor or Amundi Pioneer Asset Management, Inc., for a prospectus or summary prospectus containing this information. Read it carefully. Any information in this shareholder report regarding market or economic trends or the factors influencing the Fund's historical or future performance are statements of opinion as of the date of this report. Past performance is no guarantee of future results. Pioneer Disciplined Value Fund | Annual Report | 8/31/19 9 Portfolio Summary | 8/31/19 Portfolio Diversification -------------------------------------------------------------------------------- (As a percentage of total investments)* [THE FOLLOWING DATA WAS REPRESENTED AS A PIE CHART IN THE PRINTED MATERIAL] Common Stocks 93.9% U.S. Government and Agency Obligations 6.1% Sector Distribution -------------------------------------------------------------------------------- (As a percentage of total investments)* [THE FOLLOWING DATA WAS REPRESENTED AS A PIE CHART IN THE PRINTED MATERIAL] Financials 34.3% Health Care 13.7% Consumer Discretionary 11.5% Real Estate 7.9% Industrials 7.6% Consumer Staples 7.1% Communication Services 6.1% Information Technology 5.1% Energy 3.4% Materials 2.2% Utilities 1.1% 10 Largest Holdings -------------------------------------------------------------------------------- (As a percentage of total investments)* 1. JPMorgan Chase & Co. 5.73% -------------------------------------------------------------------------------- 2. Bank of America Corp. 5.42 -------------------------------------------------------------------------------- 3. Berkshire Hathaway, Inc., Class B 4.84 -------------------------------------------------------------------------------- 4. Home Depot, Inc. 4.04 -------------------------------------------------------------------------------- 5. United States Treasury Bill, 9/24/19 3.97 -------------------------------------------------------------------------------- 6. AT&T, Inc. 3.29 -------------------------------------------------------------------------------- 7. American International Group, Inc. 3.14 -------------------------------------------------------------------------------- 8. BlackRock, Inc., Class A 3.07 -------------------------------------------------------------------------------- 9. Merck & Co., Inc. 2.79 -------------------------------------------------------------------------------- 10. Humana, Inc. 2.77 -------------------------------------------------------------------------------- * Excludes temporary cash investments and all derivative contracts except for options purchased. The Fund is actively managed, and current holdings may be different. The holdings listed should not be considered recommendations to buy or sell any securities. 10 Pioneer Disciplined Value Fund | Annual Report | 8/31/19 Prices and Distributions | 8/31/19 Net Asset Value per Share -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- Class 8/31/19 8/31/18 -------------------------------------------------------------------------------- A $13.58 $16.20 -------------------------------------------------------------------------------- C $13.29 $15.85 -------------------------------------------------------------------------------- R $13.02 $15.63 -------------------------------------------------------------------------------- Y $13.68 $16.30 -------------------------------------------------------------------------------- Distributions per Share: 9/1/18 - 8/31/19 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- Net Investment Short-Term Long-Term Class Income Capital Gains Capital Gains -------------------------------------------------------------------------------- A $0.1351 $0.6369 $1.4540 -------------------------------------------------------------------------------- C $ -- $0.6369 $1.4540 -------------------------------------------------------------------------------- R $0.0996 $0.6369 $1.4540 -------------------------------------------------------------------------------- Y $0.1709 $0.6369 $1.4540 -------------------------------------------------------------------------------- The Russell 1000 Value Index is an unmanaged measure of the performance of large-cap U.S. value stocks. Index returns are calculated monthly, assume reinvestment of dividends and, unlike Fund returns, do not reflect any fees, expenses or sales charges. It is not possible to invest directly in an index. The index defined here pertains to the "Value of $10,000 Investment" and "Value of $5 Million Investment" charts on pages 12-15. Pioneer Disciplined Value Fund | Annual Report | 8/31/19 11 Performance Update | 8/31/19 Class A Shares Investment Returns -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $10,000 investment made in Class A shares of Pioneer Disciplined Value Fund at public offering price during the periods shown, compared to that of the Russell 1000 Value Index. Average Annual Total Returns (As of August 31, 2019) ---------------------------------------------------------- Net Public Russell Asset Offering 1000 Value Price Value Period (NAV) (POP) Index ---------------------------------------------------------- 10 years 9.64% 8.99% 11.49% 5 years 5.93 4.68 6.59 1 year -1.63 -7.29 0.62 ---------------------------------------------------------- Expense Ratio (Per prospectus dated December 31, 2018) ---------------------------------------------------------- Gross ---------------------------------------------------------- 1.13% ---------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $10,000 Investment Pioneer Disciplined Russell 1000 Value Fund Value Index 8/09 $ 9,425 $10,000 8/10 $ 9,612 $10,496 8/11 $10,928 $12,004 8/12 $12,547 $14,081 8/13 $14,587 $17,334 8/14 $17,734 $21,569 8/15 $16,819 $20,818 8/16 $18,055 $23,508 8/17 $21,644 $26,230 8/18 $24,046 $29,500 8/19 $23,654 $29,682 Call 1-800-225-6292 or visit www.amundipioneer.com/us for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. NAV results represent the percent change in net asset value per share. NAV returns would have been lower had sales charges been reflected. POP returns reflect deduction of maximum 5.75% sales charge. All results are historical and assume the reinvestment of dividends and capital gains. Other share classes are available for which performance and expenses will differ. Performance results reflect any applicable expense waivers in effect during the periods shown. Without such waivers Fund performance would be lower. Waivers may not be in effect for all funds. Certain fee waivers are contractual through a specified period. Otherwise, fee waivers can be rescinded at any time. See the prospectus and financial statements for more information. The 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. The Fund acquired the assets and liabilities of Pioneer Disciplined Value Fund ("the predecessor fund") on June 7, 2013. As a result of the reorganization, the predecessor fund's performance and financial history became the performance and financial history of the Fund. The performance of Class A shares of the Fund is the performance of Class A shares of the predecessor fund for periods prior to the reorganization, and has not been restated to reflect any differences in expenses. Please refer to the financial highlights for a more current expense ratio. 12 Pioneer Disciplined Value Fund | Annual Report | 8/31/19 Performance Update | 8/31/19 Class C Shares Investment Returns -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $10,000 investment made in Class C shares of Pioneer Disciplined Value Fund during the periods shown, compared to that of the Russell 1000 Value Index. Average Annual Total Returns (As of August 31, 2019) ---------------------------------------------------------- Russell 1000 If If Value Period Held Redeemed Index ---------------------------------------------------------- 10 years 8.75% 8.75% 11.49% 5 years 5.15 5.15 6.59 1 year -2.39 -2.39 0.62 ---------------------------------------------------------- Expense Ratio (Per prospectus dated December 31, 2018) ---------------------------------------------------------- Gross ---------------------------------------------------------- 1.84% ---------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $10,000 Investment Pioneer Disciplined Russell 1000 Value Fund Value Index 8/09 $10,000 $10,000 8/10 $10,107 $10,496 8/11 $11,385 $12,004 8/12 $12,936 $14,081 8/13 $14,912 $17,334 8/14 $18,000 $21,569 8/15 $16,945 $20,818 8/16 $18,066 $23,508 8/17 $21,494 $26,230 8/18 $23,706 $29,500 8/19 $23,139 $29,682 Call 1-800-225-6292 or visit www.amundipioneer.com/us for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. Class C shares held for less than one year are also subject to a 1% contingent deferred sales charge (CDSC). "If Held" results represent the percent change in net asset value per share. "If Redeemed" returns would have been lower had sales charges been reflected. All results are historical and assume the reinvestment of dividends and capital gains. Other share classes are available for which performance and expenses will differ. Performance results reflect any applicable expense waivers in effect during the periods shown. Without such waivers Fund performance would be lower. Waivers may not be in effect for all funds. Certain fee waivers are contractual through a specified period. Otherwise, fee waivers can be rescinded at any time. See the prospectus and financial statements for more information. The performance table and graph do not reflect the deduction of fees and taxes that a shareowner would pay on Fund distributions or the redemption of Fund shares. The Fund acquired the assets and liabilities of Pioneer Disciplined Value Fund ("the predecessor fund") on June 7, 2013. As a result of the reorganization, the predecessor fund's performance and financial history became the performance and financial history of the Fund. The performance of Class C shares of the Fund is the performance of Class C shares of the predecessor fund for periods prior to the reorganization, and has not been restated to reflect any differences in expenses. Please refer to the financial highlights for a more current expense ratio. Pioneer Disciplined Value Fund | Annual Report | 8/31/19 13 Performance Update | 8/31/19 Class R Shares Investment Returns -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $10,000 investment made in Class R shares of Pioneer Disciplined Value Fund during the periods shown, compared to that of the Russell 1000 Value Index. Average Annual Total Returns (As of August 31, 2019) ---------------------------------------------------------- Russell 1000 Net Asset Value Period Value (NAV) Index ---------------------------------------------------------- 10 years 9.46% 11.49% 5 years 5.66 6.59 1 year -1.94 0.62 ---------------------------------------------------------- Expense Ratio (Per prospectus dated December 31, 2018) ---------------------------------------------------------- Gross ---------------------------------------------------------- 1.52% ---------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $10,000 Investment Pioneer Disciplined Russell 1000 Value Fund Value Index 8/09 $10,000 $10,000 8/10 $10,198 $10,496 8/11 $11,595 $12,004 8/12 $13,312 $14,081 8/13 $15,465 $17,334 8/14 $18,751 $21,569 8/15 $17,753 $20,818 8/16 $19,018 $23,508 8/17 $22,733 $26,230 8/18 $25,180 $29,500 8/19 $24,692 $29,682 Call 1-800-225-6292 or visit www.amundipioneer.com/us for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. The Fund acquired the assets and liabilities of Pioneer Disciplined Value Fund ("the predecessor fund") on June 7, 2013. As a result of the reorganization, the predecessor fund's performance and financial history became the performance and financial history of the Fund. The predecessor fund did not offer Class R shares. Accordingly, the performance of Class R shares of the Fund is the performance of Class A shares of the predecessor fund for periods prior to the reorganization, restated to reflect the higher distribution and service fees of Class R shares, but not other differences in expenses. Class R shares are not subject to sales charges and are available for limited groups of eligible investors, including institutional investors. All results are historical and assume the reinvestment of dividends and capital gains. Other share classes are available for which performance and expenses will differ. Performance results reflect any applicable expense waivers in effect during the periods shown. Without such waivers Fund performance would be lower. Waivers may not be in effect for all funds. Certain fee waivers are contractual through a specified period. Otherwise, fee waivers can be rescinded at any time. See the prospectus and financial statements for more information. The performance table and graph do not reflect the deduction of taxes that a shareowner would pay on Fund distributions or the redemption of Fund shares. Please refer to the financial highlights for a more current expense ratio. 14 Pioneer Disciplined Value Fund | Annual Report | 8/31/19 Performance Update | 8/31/19 Class Y Shares Investment Returns -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $5 million investment made in Class Y shares of Pioneer Disciplined Value Fund during the periods shown, compared to that of the Russell 1000 Value Index. Average Annual Total Returns (As of August 31, 2019) ---------------------------------------------------------- Russell 1000 Net Asset Value Period Value (NAV) Index ---------------------------------------------------------- 10 years 9.99% 11.49% 5 years 6.27 6.59 1 year -1.33 0.62 ---------------------------------------------------------- Expense Ratio (Per prospectus dated December 31, 2018) ---------------------------------------------------------- Gross ---------------------------------------------------------- 0.83% ---------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $5 Million Investment Pioneer Disciplined Russell 1000 Value Fund Value Index 8/09 $ 5,000,000 $ 5,000,000 8/10 $ 5,112,990 $ 5,248,083 8/11 $ 5,834,431 $ 6,002,128 8/12 $ 6,721,233 $ 7,040,449 8/13 $ 7,837,301 $ 8,666,907 8/14 $ 9,559,332 $10,784,388 8/15 $ 9,095,297 $10,408,942 8/16 $ 9,804,704 $11,754,042 8/17 $11,785,054 $13,114,870 8/18 $13,131,224 $14,750,185 8/19 $12,956,117 $14,841,208 Call 1-800-225-6292 or visit www.amundipioneer.com/us for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. The Fund acquired the assets and liabilities of Pioneer Disciplined Value Fund ("the predecessor fund") on June 7, 2013. As a result of the reorganization, the predecessor fund's performance and financial history became the performance and financial history of the Fund. The performance of Class Y shares of the Fund is the performance of Class Y shares of the predecessor fund for periods prior to the reorganization, and has not been restated to reflect any differences in expenses. Class Y shares are not subject to sales charges and are available for limited groups of eligible investors, including institutional investors. All results are historical and assume the reinvestment of dividends and capital gains. Other share classes are available for which performance and expenses will differ. Performance results reflect any applicable expense waivers in effect during the periods shown. Without such waivers Fund performance would be lower. Waivers may not be in effect for all funds. Certain fee waivers are contractual through a specified period. Otherwise, fee waivers can be rescinded at any time. See the prospectus and financial statements for more information. The performance table and graph do not reflect the deduction of fees and taxes that a shareowner would pay on Fund distributions or the redemption of Fund shares. Please refer to the financial highlights for a more current expense ratio. Pioneer Disciplined Value Fund | Annual Report | 8/31/19 15 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 Disciplined Value Fund Based on actual returns from March 1, 2019 through August 31, 2019. -------------------------------------------------------------------------------- Share Class A C R Y -------------------------------------------------------------------------------- Beginning Account $1,000.00 $1,000.00 $1,000.00 $1,000.00 Value on 3/1/19 -------------------------------------------------------------------------------- Ending Account $1,021.07 $1,016.03 $1,017.96 $1,022.49 Value (after expenses) on 8/31/19 -------------------------------------------------------------------------------- Expenses Paid $6.01 $9.76 $7.78 $4.49 During Period* -------------------------------------------------------------------------------- * Expenses are equal to the Fund's annualized expense ratio of 1.18%, 1.92%, 1.53%, and 0.88% for Class A, Class C, Class R, and Class Y shares, respectively, multiplied by the average account value over the period, multiplied by 184/365 (to reflect the partial year period). 16 Pioneer Disciplined Value Fund | Annual Report | 8/31/19 Hypothetical Example for Comparison Purposes The table below provides information about hypothetical account values and hypothetical expenses based on the Fund's actual expense ratio and an assumed rate of return of 5% per year before expenses, which is not the Fund's actual return. The hypothetical account values and expenses may not be used to estimate the actual ending account balance or expenses you paid for the period. You may use this information to compare the ongoing costs of investing in the Fund and other funds. To do so, compare this 5% hypothetical example with the 5% hypothetical examples that appear in the shareholder reports of the other funds. Please note that the expenses shown in the tables are meant to highlight your ongoing costs only and do not reflect any transaction costs, such as sales charges (loads) that are charged at the time of the transaction. Therefore, the table below is useful in comparing ongoing costs only and will not help you determine the relative total costs of owning different funds. In addition, if these transaction costs were included, your costs would have been higher. Expenses Paid on a $1,000 Investment in Pioneer Disciplined Value Fund Based on a hypothetical 5% return per year before expenses, reflecting the period from March 1, 2019 through August 31, 2019. -------------------------------------------------------------------------------- Share Class A C R Y -------------------------------------------------------------------------------- Beginning Account $1,000.00 $1,000.00 $1,000.00 $1,000.00 Value on 3/1/19 -------------------------------------------------------------------------------- Ending Account $1,019.26 $1,015.53 $1,017.49 $1,020.77 Value (after expenses) on 8/31/19 -------------------------------------------------------------------------------- Expenses Paid $6.01 $9.75 $7.78 $4.48 During Period* -------------------------------------------------------------------------------- * Expenses are equal to the Fund's annualized expense ratio of 1.18%, 1.92%, 1.53%, and 0.88% for Class A, Class C, Class R, and Class Y shares, respectively, multiplied by the average account value over the period, multiplied by 184/365 (to reflect the partial year period). Pioneer Disciplined Value Fund | Annual Report | 8/31/19 17 Schedule of Investments | 8/31/19 --------------------------------------------------------------------------------------------------- Shares Value --------------------------------------------------------------------------------------------------- UNAFFILIATED ISSUERS -- 103.4% COMMON STOCKS -- 97.1% of Net Assets Aerospace & Defense -- 1.7% 36,717 Raytheon Co. $ 6,804,394 ------------ Total Aerospace & Defense $ 6,804,394 --------------------------------------------------------------------------------------------------- Auto Components -- 4.3% 104,420 Aptiv Plc $ 8,684,611 258,881 BorgWarner, Inc. 8,447,287 ------------ Total Auto Components $ 17,131,898 --------------------------------------------------------------------------------------------------- Banks -- 13.1% 818,957 Bank of America Corp. $ 22,529,507 216,733 JPMorgan Chase & Co. 23,810,287 33,406(a) SVB Financial Group 6,501,476 ------------ Total Banks $ 52,841,270 --------------------------------------------------------------------------------------------------- Beverages -- 1.8% 53,553 PepsiCo., Inc. $ 7,322,302 ------------ Total Beverages $ 7,322,302 --------------------------------------------------------------------------------------------------- Capital Markets -- 5.0% 30,210 BlackRock, Inc. $ 12,765,538 175,894 Morgan Stanley 7,297,842 ------------ Total Capital Markets $ 20,063,380 --------------------------------------------------------------------------------------------------- Chemicals -- 1.3% 118,436 Dow, Inc. $ 5,048,927 ------------ Total Chemicals $ 5,048,927 --------------------------------------------------------------------------------------------------- Commercial Services & Supplies -- 1.7% 57,882 Waste Management, Inc. $ 6,908,217 ------------ Total Commercial Services & Supplies $ 6,908,217 --------------------------------------------------------------------------------------------------- Communications Equipment -- 0.4% 37,363 Cisco Systems, Inc. $ 1,748,962 ------------ Total Communications Equipment $ 1,748,962 --------------------------------------------------------------------------------------------------- Consumer Discretionary -- 2.4% 215,845 Comcast Corp. $ 9,553,300 ------------ Total Consumer Discretionary $ 9,553,300 --------------------------------------------------------------------------------------------------- Containers & Packaging -- 1.0% 50,916 Ball Corp. $ 4,094,156 ------------ Total Containers & Packaging $ 4,094,156 --------------------------------------------------------------------------------------------------- Diversified Financial Services -- 5.0% 98,936(a) Berkshire Hathaway, Inc., Class B $ 20,124,572 ------------ Total Diversified Financial Services $ 20,124,572 --------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 18 Pioneer Disciplined Value Fund | Annual Report | 8/31/19 --------------------------------------------------------------------------------------------------- Shares Value --------------------------------------------------------------------------------------------------- Diversified Telecommunication Services -- 3.4% 387,062 AT&T, Inc. $ 13,647,806 ------------ Total Diversified Telecommunication Services $ 13,647,806 --------------------------------------------------------------------------------------------------- Electric Utilities -- 1.1% 49,300 American Electric Power Co., Inc. $ 4,493,695 ------------ Total Electric Utilities $ 4,493,695 --------------------------------------------------------------------------------------------------- Entertainment -- 0.5% 81,162 Viacom, Inc., Class B $ 2,027,427 ------------ Total Entertainment $ 2,027,427 --------------------------------------------------------------------------------------------------- Equity Real Estate Investment Trusts (REITs) -- 8.2% 90,838 Digital Realty Trust, Inc. $ 11,230,302 35,048 Essex Property Trust, Inc. 11,259,521 122,745 Liberty Property Trust 6,397,469 47,173 Prologis, Inc. 3,944,606 ------------ Total Equity Real Estate Investment Trusts (REITs) $ 32,831,898 --------------------------------------------------------------------------------------------------- Food & Staples Retailing -- 5.0% 15,922 Costco Wholesale Corp. $ 4,693,169 106,474 Sysco Corp. 7,914,212 138,383 Walgreens Boots Alliance, Inc. 7,083,826 ------------ Total Food & Staples Retailing $ 19,691,207 --------------------------------------------------------------------------------------------------- Health Care Equipment & Supplies -- 2.7% 102,553 Medtronic Plc $ 11,064,443 ------------ Total Health Care Equipment & Supplies $ 11,064,443 --------------------------------------------------------------------------------------------------- Health Care Providers & Services -- 3.9% 49,244 AmerisourceBergen Corp. $ 4,051,304 40,604 Humana, Inc. 11,499,459 ------------ Total Health Care Providers & Services $ 15,550,763 --------------------------------------------------------------------------------------------------- Household Products -- 0.6% 20,658 Procter & Gamble Co. $ 2,483,711 ------------ Total Household Products $ 2,483,711 --------------------------------------------------------------------------------------------------- Insurance -- 6.0% 250,328 American International Group, Inc. $ 13,027,069 43,234 Marsh & McLennan Cos., Inc. 4,318,644 88,514 Progressive Corp. 6,709,361 ------------ Total Insurance $ 24,055,074 --------------------------------------------------------------------------------------------------- IT Services -- 1.5% 101,590 Cognizant Technology Solutions Corp. $ 6,236,610 ------------ Total IT Services $ 6,236,610 --------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Disciplined Value Fund | Annual Report | 8/31/19 19 Schedule of Investments | 8/31/19 (continued) --------------------------------------------------------------------------------------------------- Shares Value --------------------------------------------------------------------------------------------------- Machinery -- 1.2% 35,409 Stanley Black & Decker, Inc. $ 4,704,440 ------------ Total Machinery $ 4,704,440 --------------------------------------------------------------------------------------------------- Multiline Retail -- 1.2% 32,021 Dollar General Corp. $ 4,998,158 ------------ Total Multiline Retail $ 4,998,158 --------------------------------------------------------------------------------------------------- Oil, Gas & Consumable Fuels -- 3.5% 137,318 EOG Resources, Inc. $ 10,187,622 79,092 TOTAL SA (A.D.R.) 3,948,273 ------------ Total Oil, Gas & Consumable Fuels $ 14,135,895 --------------------------------------------------------------------------------------------------- Pharmaceuticals -- 7.5% 203,025(a) Elanco Animal Health, Inc. $ 5,282,710 68,442 Eli Lilly & Co. 7,731,893 134,124 Merck & Co., Inc. 11,597,702 108,375 Novo Nordisk AS (A.D.R.) 5,647,421 ------------ Total Pharmaceuticals $ 30,259,726 --------------------------------------------------------------------------------------------------- Road & Rail -- 2.4% 33,965 Kansas City Southern $ 4,272,797 30,281 Norfolk Southern Corp. 5,270,408 ------------ Total Road & Rail $ 9,543,205 --------------------------------------------------------------------------------------------------- Semiconductors & Semiconductor Equipment -- 2.6% 20,092 Lam Research Corp. $ 4,229,567 130,573(a) Micron Technology, Inc. 5,911,040 ------------ Total Semiconductors & Semiconductor Equipment $ 10,140,607 --------------------------------------------------------------------------------------------------- Specialty Retail -- 6.4% 73,573 Home Depot, Inc. $ 16,768,022 158,366 TJX Cos., Inc. 8,705,379 ------------ Total Specialty Retail $ 25,473,401 --------------------------------------------------------------------------------------------------- Technology Hardware, Storage & Peripherals -- 0.8% 5,748 Apple, Inc. $ 1,199,837 42,277 NetApp, Inc. 2,031,833 ------------ Total Technology Hardware, Storage & Peripherals $ 3,231,670 --------------------------------------------------------------------------------------------------- Trading Companies & Distributors -- 0.9% 33,183(a) United Rentals, Inc. $ 3,735,079 ------------ Total Trading Companies & Distributors $ 3,735,079 --------------------------------------------------------------------------------------------------- TOTAL COMMON STOCKS (Cost $373,005,312) $389,946,193 --------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 20 Pioneer Disciplined Value Fund | Annual Report | 8/31/19 ---------------------------------------------------------------------------------------------------- Principal Amount USD ($) Value ---------------------------------------------------------------------------------------------------- U.S. GOVERNMENT AND AGENCY OBLIGATIONS -- 6.3% of Net Assets 9,000,000(b) United States Treasury Bill, 9/17/19 $ 8,992,908 16,500,000(b) United States Treasury Bill, 9/24/19 16,480,365 ---------------------------------------------------------------------------------------------------- TOTAL U.S. GOVERNMENT AND AGENCY OBLIGATIONS (Cost $25,470,244) $ 25,473,273 ---------------------------------------------------------------------------------------------------- TOTAL INVESTMENTS IN UNAFFILIATED ISSUERS -- 103.4% (Cost $398,475,556) $415,419,466 ---------------------------------------------------------------------------------------------------- OTHER ASSETS AND LIABILITIES -- (3.4)% $(13,812,825) ---------------------------------------------------------------------------------------------------- NET ASSETS -- 100.0% $401,606,641 ==================================================================================================== REIT Real Estate Investment Trust. (A.D.R.) American Depositary Receipts. (a) Non-income producing security. (b) Security issued with a zero coupon. Income is recognized through accretion of discount. Purchases and sales of securities (excluding temporary cash investments) for the year ended August 31, 2019, aggregated $478,216,777 and $565,498,603, respectively. The Fund is permitted to engage in purchase and sale transactions ("cross trades") with certain funds and accounts for which Amundi Pioneer Asset Management, Inc. (the "Adviser") serves as the Fund's investment adviser, as set forth in Rule 17a-7 under the Investment Company Act of 1940, pursuant to procedures adopted by the Board of Trustees. Under these procedures, cross trades are effected at current market prices. During the year ended August 31, 2019, the Fund did not engage in any cross trade activity. At August 31, 2019, the net unrealized appreciation on investments based on cost for federal tax purposes of $399,135,853 was as follows: Aggregate gross unrealized appreciation for all investments in which there is an excess of value over tax cost $ 34,572,026 Aggregate gross unrealized depreciation for all investments in which there is an excess of tax cost over value (18,288,413) ------------ Net unrealized appreciation $ 16,283,613 ============ Various inputs are used in determining the value of the Fund's investments. These inputs are summarized in the three broad levels below. Level 1 - quoted prices in active markets for identical securities. Level 2 - other significant observable inputs (including quoted prices for similar securities, interest rates, prepayment speeds, credit risks, etc.). See Notes to Financial Statements -- Note 1A. Level 3 - significant unobservable inputs (including the Fund's own assumptions in determining fair value of investments). See Notes to Financial Statements -- Note 1A. The accompanying notes are an integral part of these financial statements. Pioneer Disciplined Value Fund | Annual Report | 8/31/19 21 Schedule of Investments | 8/31/19 (continued) The following is a summary of the inputs used as of August 31, 2019, in valuing the Fund's investments: --------------------------------------------------------------------------------------------------- Level 1 Level 2 Level 3 Total --------------------------------------------------------------------------------------------------- Common Stocks $389,946,193 $ -- $ -- $389,946,193 U.S. Government and Agency Obligations -- 25,473,273 -- 25,473,273 --------------------------------------------------------------------------------------------------- Total Investments in Securities $389,946,193 $25,473,273 $ -- $415,419,466 =================================================================================================== During the year ended August 31, 2019, there were no transfers between Levels 1, 2 and 3. The accompanying notes are an integral part of these financial statements. 22 Pioneer Disciplined Value Fund | Annual Report | 8/31/19 Statement of Assets and Liabilities | 8/31/19 ASSETS: Investments in unaffiliated issuers, at value (cost $398,475,556) $415,419,466 Cash 1,657,914 Receivables -- Investment securities sold 949,420 Fund shares sold 197,285 Dividends 473,248 Other assets 34,480 --------------------------------------------------------------------------------------------- Total assets $418,731,813 ============================================================================================= LIABILITIES: Payables -- Investment securities purchased $ 16,240,541 Fund shares repurchased 567,640 Trustees' fees 2,768 Due to affiliates 46,433 Accrued expenses 267,790 --------------------------------------------------------------------------------------------- Total liabilities $ 17,125,172 ============================================================================================= NET ASSETS: Paid-in capital $386,048,697 Distributable earnings 15,557,944 --------------------------------------------------------------------------------------------- Net assets $401,606,641 ============================================================================================= NET ASSET VALUE PER SHARE: No par value (unlimited number of shares authorized) Class A (based on $278,737,552/20,524,610 shares) $ 13.58 Class C (based on $24,940,935/1,876,006 shares) $ 13.29 Class R (based on $10,493,793/805,959 shares) $ 13.02 Class Y (based on $87,434,361/6,391,455 shares) $ 13.68 MAXIMUM OFFERING PRICE PER SHARE: Class A (based on $13.58 net asset value per share/100%-5.75% maximum sales charge) $ 14.41 ============================================================================================= The accompanying notes are an integral part of these financial statements. Pioneer Disciplined Value Fund | Annual Report | 8/31/19 23 Statement of Operations For the Year Ended 8/31/19 INVESTMENT INCOME: Dividends from unaffiliated issuers (net of foreign taxes withheld $175,586) $10,517,808 Interest from unaffiliated issuers 401,271 ---------------------------------------------------------------------------------------------------- Total investment income $ 10,919,079 ---------------------------------------------------------------------------------------------------- EXPENSES: Management fees $ 2,836,017 Administrative expense 212,048 Transfer agent fees Class A 406,647 Class C 43,631 Class R 31,791 Class Y 115,291 Distribution fees Class A 736,558 Class C 350,617 Class R 53,093 Shareowner communications expense 80,792 Custodian fees 9,674 Registration fees 112,027 Professional fees 62,442 Printing expense 34,931 Trustees' fees 16,568 Insurance expense 6,318 Miscellaneous 73,344 ---------------------------------------------------------------------------------------------------- Total expenses $ 5,181,789 Less fees waived and expenses reimbursed by the Adviser (19,179) ---------------------------------------------------------------------------------------------------- Net expenses $ 5,162,610 ---------------------------------------------------------------------------------------------------- Net investment income $ 5,756,469 ---------------------------------------------------------------------------------------------------- REALIZED AND UNREALIZED GAIN (LOSS) ON INVESTMENTS: Net realized gain (loss) on: Investments in unaffiliated issuers $ (719,550) ---------------------------------------------------------------------------------------------------- Change in net unrealized appreciation (depreciation) on: Investments in unaffiliated issuers $(18,176,393) ---------------------------------------------------------------------------------------------------- Net realized and unrealized gain (loss) on investments $(18,895,943) ---------------------------------------------------------------------------------------------------- Net decrease in net assets resulting from operations $(13,139,474) ==================================================================================================== The accompanying notes are an integral part of these financial statements. 24 Pioneer Disciplined Value Fund | Annual Report | 8/31/19 Statements of Changes in Net Assets ----------------------------------------------------------------------------------------------------- Year Ended Year Ended 8/31/19 8/31/18 ----------------------------------------------------------------------------------------------------- FROM OPERATIONS: Net investment income (loss) $ 5,756,469 $ 3,140,844 Net realized gain (loss) on investments (719,550) 70,156,937 Change in net unrealized appreciation (depreciation) on investments (18,176,393) (13,400,973) ----------------------------------------------------------------------------------------------------- Net increase (decrease) in net assets resulting from operations $ (13,139,474) $ 59,896,808 ----------------------------------------------------------------------------------------------------- DISTRIBUTIONS TO SHAREOWNERS: Class A ($2.23 and $2.43 per share, respectively) $ (45,467,830) $ (43,109,750)* Class C ($2.09 and $2.30 per share, respectively) (5,432,217) (13,769,982)* Class R ($2.19 and $2.38 per share, respectively) (1,602,207) (1,631,879)* Class Y ($2.26 and $2.48 per share, respectively) (15,694,962) (21,228,346)* ----------------------------------------------------------------------------------------------------- Total distributions to shareowners $ (68,197,216) $ (79,739,957) ----------------------------------------------------------------------------------------------------- FROM FUND SHARE TRANSACTIONS: Net proceeds from sales of shares $ 98,063,715 $ 71,524,284 Reinvestment of distributions 64,350,298 70,261,333 Cost of shares repurchased (192,913,078) (179,720,664) ----------------------------------------------------------------------------------------------------- Net decrease in net assets resulting from Fund share transactions $ (30,499,065) $ (37,935,047) ----------------------------------------------------------------------------------------------------- Net decrease in net assets $(111,835,755) $ (57,778,196) NET ASSETS:** Beginning of year $ 513,442,396 $ 571,220,592 ----------------------------------------------------------------------------------------------------- End of year $ 401,606,641 $ 513,442,396 ===================================================================================================== * For the year ended August 31, 2018, distributions to shareowners were presented as follows: Net investment income: Class A ($0.16 per share) $ (3,153,770) Class C ($0.03 per share) (227,168) Class R ($0.11 per share) (88,850) Class Y ($0.21 per share) (1,993,084) Net realized gain: Class A ($2.27 per share) $ (39,955,980) Class C ($2.27 per share) (13,542,814) Class R ($2.27 per share) (1,543,029) Class Y ($2.27 per share) (19,235,262) **For the year ended August 31, 2018, undistributed net investment income was presented as follows: $2,243,978. The accompanying notes are an integral part of these financial statements. Pioneer Disciplined Value Fund | Annual Report | 8/31/19 25 Statements of Changes in Net Assets (continued) ------------------------------------------------------------------------------------------------- Year Ended Year Ended Year Ended Year Ended 8/31/19 8/31/19 8/31/18 8/31/18 Shares Amount Shares Amount ------------------------------------------------------------------------------------------------- Class A Shares sold 5,195,800 $ 77,589,975 1,814,828 $ 29,486,394 Reinvestment of distributions 3,373,778 43,731,369 2,616,595 41,325,920 Less shares repurchased (6,409,271) (86,702,591) (4,344,138) (70,910,168) ------------------------------------------------------------------------------------------------- Net increase (decrease) 2,160,307 $ 34,618,753 87,285 $ (97,854) ================================================================================================= Class C Shares sold 516,340 $ 6,973,244 323,202 $ 5,154,822 Reinvestment of distributions 368,853 4,699,193 788,637 12,156,647 Less shares repurchased (4,587,270) (68,037,987) (1,769,537) (28,311,321) ------------------------------------------------------------------------------------------------- Net decrease (3,702,077) $(56,365,550) (657,698) $(10,999,852) ================================================================================================= Class R Shares sold 155,661 $ 2,028,791 107,336 $ 1,682,570 Reinvestment of distributions 125,581 1,564,433 104,400 1,590,205 Less shares repurchased (196,530) (2,538,277) (216,664) (3,438,487) ------------------------------------------------------------------------------------------------- Net increase (decrease) 84,712 $ 1,054,947 (4,928) $ (165,712) ================================================================================================= Class Y Shares sold 817,600 $ 11,471,705 2,147,796 $ 35,200,498 Reinvestment of distributions 1,100,975 14,355,303 955,019 15,188,561 Less shares repurchased (2,663,113) (35,634,223) (4,740,306) (77,060,688) ------------------------------------------------------------------------------------------------- Net decrease (744,538) $ (9,807,215) (1,637,491) $(26,671,629) ================================================================================================= The accompanying notes are an integral part of these financial statements. 26 Pioneer Disciplined Value Fund | Annual Report | 8/31/19 Financial Highlights ------------------------------------------------------------------------------------------------------------------------------------ Year Year Year Year Year Ended Ended Ended Ended Ended 8/31/19 8/31/18 8/31/17 8/31/16* 8/31/15* ------------------------------------------------------------------------------------------------------------------------------------ Class A Net asset value, beginning of period $ 16.20 $ 16.84 $ 14.18 $ 16.42 $ 21.00 ------------------------------------------------------------------------------------------------------------------------------------ Increase (decrease) from investment operations: Net investment income (loss) $ 0.18(a) $ 0.10(a) $ 0.19(a) $ 0.16(a) $ 0.15 Net realized and unrealized gain (loss) on investments (0.57) 1.69 2.61 0.96 (1.00) ------------------------------------------------------------------------------------------------------------------------------------ Net increase (decrease) from investment operations $ (0.39) $ 1.79 $ 2.80 $ 1.12 $ (0.85) ------------------------------------------------------------------------------------------------------------------------------------ Distributions to shareowners: Net investment income $ (0.14) $ (0.16) $ (0.14) $ (0.16) $ (0.11) Net realized gain (2.09) (2.27) -- (3.20) (3.62) ------------------------------------------------------------------------------------------------------------------------------------ Total distributions $ (2.23) $ (2.43) $ (0.14) $ (3.36) $ (3.73) ------------------------------------------------------------------------------------------------------------------------------------ Net increase (decrease) in net asset value $ (2.62) $ (0.64) $ 2.66 $ (2.24) $ (4.58) ------------------------------------------------------------------------------------------------------------------------------------ Net asset value, end of period $ 13.58 $ 16.20 $ 16.84 $ 14.18 $ 16.42 ==================================================================================================================================== Total return (b) (1.63)% 11.10% 19.88% 7.35% (5.16)% Ratio of net expenses to average net assets 1.18% 1.13% 1.15% 1.18% 1.17% Ratio of net investment income (loss) to average net assets 1.32% 0.62% 1.23% 1.11% 0.82% Portfolio turnover rate 113% 112% 115% 129% 122% Net assets, end of period (in thousands) $278,738 $297,450 $307,799 $316,382 $392,989 ==================================================================================================================================== * The Fund was audited by an independent registered public accounting firm other than Ernst & Young LLP. (a) The per-share data presented above is based on the average shares outstanding for the period presented. (b) Assumes initial investment at net asset value at the beginning of each period, reinvestment of all distributions, the complete redemption of the investment at net asset value at the end of each period and no sales charges. Total return would be reduced if sales charges were taken into account. The accompanying notes are an integral part of these financial statements. Pioneer Disciplined Value Fund | Annual Report | 8/31/19 27 Financial Highlights (continued) ------------------------------------------------------------------------------------------------------------------------------------ Year Year Year Year Year Ended Ended Ended Ended Ended 8/31/19 8/31/18 8/31/17 8/31/16* 8/31/15* ------------------------------------------------------------------------------------------------------------------------------------ Class C Net asset value, beginning of period $ 15.85 $ 16.52 $ 13.91 $ 16.14 $ 20.73 ------------------------------------------------------------------------------------------------------------------------------------ Increase (decrease) from investment operations: Net investment income (loss) $ 0.09(a) $ (0.02)(a) $ 0.07(a) $ 0.05(a) $ 0.02 Net realized and unrealized gain (loss) on investments (0.56) 1.65 2.57 0.95 (0.99) ------------------------------------------------------------------------------------------------------------------------------------ Net increase (decrease) from investment operations $ (0.47) $ 1.63 $ 2.64 $ 1.00 $ (0.97) ------------------------------------------------------------------------------------------------------------------------------------ Distributions to shareowners: Net investment income $ -- $ (0.03) $ (0.03) $ (0.03) $ (0.00)(b) Net realized gain (2.09) (2.27) -- (3.20) (3.62) ------------------------------------------------------------------------------------------------------------------------------------ Total distributions $ (2.09) $ (2.30) $ (0.03) $ (3.23) $ (3.62) ------------------------------------------------------------------------------------------------------------------------------------ Net increase (decrease) in net asset value $ (2.56) $ (0.67) $ 2.61 $ (2.23) $ (4.59) ------------------------------------------------------------------------------------------------------------------------------------ Net asset value, end of period $ 13.29 $ 15.85 $ 16.52 $ 13.91 $ 16.14 ==================================================================================================================================== Total return (c) (2.39)% 10.29% 18.98% 6.62% (5.86)% Ratio of net expenses to average net assets 1.92% 1.84% 1.89% 1.90% 1.91% Ratio of net investment income (loss) to average net assets 0.63% (0.10)% 0.48% 0.38% 0.08% Portfolio turnover rate 113% 112% 115% 129% 122% Net assets, end of period (in thousands) $24,941 $88,422 $103,022 $120,404 $162,238 ==================================================================================================================================== * The Fund was audited by an independent registered public accounting firm other than Ernst & Young LLP. (a) The per-share data presented above is based on the average shares outstanding for the period presented. (b) Amount rounds to less than $0.01 or $(0.01) per share. (c) Assumes initial investment at net asset value at the beginning of each period, reinvestment of all distributions, the complete redemption of the investment at net asset value at the end of each period and no sales charges. Total return would be reduced if sales charges were taken into account. The accompanying notes are an integral part of these financial statements. 28 Pioneer Disciplined Value Fund | Annual Report | 8/31/19 ------------------------------------------------------------------------------------------------------------------------------------ Year Year Year Year Year Ended Ended Ended Ended Ended 8/31/19 8/31/18 8/31/17 8/31/16* 8/31/15* ------------------------------------------------------------------------------------------------------------------------------------ Class R Net asset value, beginning of period $ 15.63 $ 16.33 $ 13.77 $ 16.03 $ 20.60 ------------------------------------------------------------------------------------------------------------------------------------ Increase (decrease) from investment operations: Net investment income (loss) $ 0.13(a) $ 0.06(a) $ 0.15(a) $ 0.12(a) $ 0.10 Net realized and unrealized gain (loss) on investments (0.55) 1.62 2.53 0.94 (0.96) ------------------------------------------------------------------------------------------------------------------------------------ Net increase (decrease) from investment operations $ (0.42) $ 1.68 $ 2.68 $ 1.06 $ (0.86) ------------------------------------------------------------------------------------------------------------------------------------ Distributions to shareowners: Net investment income $ (0.10) $ (0.11) $ (0.12) $ (0.12) $ (0.09) Net realized gain (2.09) (2.27) -- (3.20) (3.62) ------------------------------------------------------------------------------------------------------------------------------------ Total distributions $ (2.19) $ (2.38) $ (0.12) $ (3.32) $ (3.71) ------------------------------------------------------------------------------------------------------------------------------------ Net increase (decrease) in net asset value $ (2.61) $ (0.70) $ 2.56 $ (2.26) $ (4.57) ------------------------------------------------------------------------------------------------------------------------------------ Net asset value, end of period $ 13.02 $ 15.63 $ 16.33 $ 13.77 $ 16.03 ==================================================================================================================================== Total return (b) (1.94)% 10.77% 19.53% 7.13% (5.32)% Ratio of net expenses to average net assets 1.53% 1.40% 1.40% 1.40% 1.40% Ratio of net investment income (loss) to average net assets 0.96% 0.35% 0.97% 0.89% 0.59% Portfolio turnover rate 113% 112% 115% 129% 122% Net assets, end of period (in thousands) $10,494 $11,275 $11,860 $12,888 $15,505 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Total expenses to average net assets 1.59% 1.52% 1.54% 1.58% 1.53% Net investment income (loss) to average net assets 0.90% 0.23% 0.84% 0.71% 0.46% ==================================================================================================================================== * The Fund was audited by an independent registered public accounting firm other than Ernst & Young LLP. (a) The per-share data presented above is based on the average shares outstanding for the period presented. (b) Assumes initial investment at net asset value at the beginning of each period, reinvestment of all distributions and the complete redemption of the investment at net asset value at the end of each period. The accompanying notes are an integral part of these financial statements. Pioneer Disciplined Value Fund | Annual Report | 8/31/19 29 Financial Highlights (continued) ------------------------------------------------------------------------------------------------------------------------------------ Year Year Year Year Year Ended Ended Ended Ended Ended 8/31/19 8/31/18 8/31/17 8/31/16* 8/31/15* ------------------------------------------------------------------------------------------------------------------------------------ Class Y Net asset value, beginning of period $ 16.30 $ 16.93 $ 14.27 $ 16.49 $ 21.09 ------------------------------------------------------------------------------------------------------------------------------------ Increase (decrease) from investment operations: Net investment income (loss) $ 0.22(a) $ 0.15(a) $ 0.24(a) $ 0.21(a) $ 0.24 Net realized and unrealized gain (loss) on investments (0.58) 1.70 2.62 0.98 (1.03) ------------------------------------------------------------------------------------------------------------------------------------ Net increase (decrease) from investment operations $ (0.36) $ 1.85 $ 2.86 $ 1.19 $ (0.79) ------------------------------------------------------------------------------------------------------------------------------------ Distributions to shareowners: Net investment income $ (0.17) $ (0.21) $ (0.20) $ (0.21) $ (0.19) Net realized gain (2.09) (2.27) -- (3.20) (3.62) ------------------------------------------------------------------------------------------------------------------------------------ Total distributions $ (2.26) $ (2.48) $ (0.20) $ (3.41) $ (3.81) ------------------------------------------------------------------------------------------------------------------------------------ Net increase (decrease) in net asset value $ (2.62) $ (0.63) $ 2.66 $ (2.22) $ (4.60) ------------------------------------------------------------------------------------------------------------------------------------ Net asset value, end of period $ 13.68 $ 16.30 $ 16.93 $ 14.27 $ 16.49 ==================================================================================================================================== Total return (b) (1.33)% 11.42% 20.20% 7.80% (4.85)% Ratio of net expenses to average net assets 0.88% 0.83% 0.84% 0.84% 0.85% Ratio of net investment income (loss) to average net assets 1.62% 0.90% 1.54% 1.45% 1.12% Portfolio turnover rate 113% 112% 115% 129% 122% Net assets, end of period (in thousands) $87,434 $116,296 $148,541 $109,037 $161,238 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 0.90% 0.83% 0.84% 0.84% 0.85% Net investment income (loss) to average net assets 1.60% 0.90% 1.54% 1.45% 1.12% ==================================================================================================================================== * The Fund was audited by an independent registered public accounting firm other than Ernst & Young LLP. (a) The per-share data presented above is based on the average shares outstanding for the period presented. (b) Assumes initial investment at net asset value at the beginning of each period, reinvestment of all distributions and the complete redemption of the investment at net asset value at the end of each period. The accompanying notes are an integral part of these financial statements. 30 Pioneer Disciplined Value Fund | Annual Report | 8/31/19 Notes to Financial Statements | 8/31/19 1. Organization and Significant Accounting Policies Pioneer Disciplined Value Fund (the "Fund") is a series of Pioneer Series Trust III, a Delaware statutory trust. The Fund is registered under the Investment Company Act of 1940 as a diversified, open-end management investment company. The Fund's investment objective is to seek long-term capital growth. The Fund offers five classes of shares designated as Class A, Class C, Class K, Class R and Class Y shares. Class K shares had not commenced operations as of August 31, 2019. Each class of shares represents an interest in the same portfolio of investments of the Fund and has identical rights (based on relative net asset values) to assets and liquidation proceeds. Share classes can bear different rates of class-specific fees and expenses, such as transfer agent and distribution fees. Differences in class-specific fees and expenses will result in differences in net investment income and, therefore, the payment of different dividends from net investment income earned by each class. The Amended and Restated Declaration of Trust of the Fund gives the Board of Trustees the flexibility to specify either per-share voting or dollar-weighted voting when submitting matters for shareowner approval. Under per-share voting, each share of a class of the Fund is entitled to one vote. Under dollar-weighted voting, a shareowner's voting power is determined not by the number of shares owned, but by the dollar value of the shares on the record date. Each share class has exclusive voting rights with respect to matters affecting only that class, including with respect to the distribution plan for that class. There is no distribution plan for Class Y shares. Amundi Pioneer Asset Management, Inc., an indirect, wholly owned subsidiary of Amundi and Amundi's wholly owned subsidiary, Amundi USA, Inc., serves as the Fund's investment adviser (the "Adviser"). Amundi Pioneer Distributor, Inc., an affiliate of Amundi Pioneer Asset Management, Inc., serves as the Fund's distributor (the "Distributor"). In August 2018, the Securities and Exchange Commission ("SEC") released a Disclosure Update and Simplification Final Rule. The Final Rule amends Regulation S-X disclosures requirements to conform them to U.S. Generally Accepted Accounting Principles ("U.S. GAAP") for investment companies. The Fund's financial statements were prepared in compliance with the new amendments to Regulation S-X. The Fund is an investment company and follows investment company accounting and reporting guidance under U.S. GAAP. U.S. GAAP requires the management of the Fund to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets Pioneer Disciplined Value Fund | Annual Report | 8/31/19 31 and liabilities at the date of the financial statements, and the reported amounts of income, expenses and gain or loss on investments during the reporting period. Actual results could differ from those estimates. The following is a summary of significant accounting policies followed by the Fund in the preparation of its financial statements: A. Security Valuation The net asset value of the Fund is computed once daily, on each day the New York Stock Exchange ("NYSE") is open, as of the close of regular trading on the NYSE. Equity securities that have traded on an exchange are valued by using the last sale price on the principal exchange where they are traded. Equity securities that have not traded on the date of valuation, or securities for which sale prices are not available, generally are valued using the mean between the last bid and asked prices or, if both last bid and asked prices are not available, at the last quoted bid price. Last sale and bid and asked prices are provided by independent third party pricing services. In the case of equity securities not traded on an exchange, prices are typically determined by independent third party pricing services using a variety of techniques and methods. Fixed-income securities are valued by using prices supplied by independent pricing services, which consider such factors as market prices, market events, quotations from one or more brokers, Treasury spreads, yields, maturities and ratings, or may use a pricing matrix or other fair value methods or techniques to provide an estimated value of the security or instrument. A pricing matrix is a means of valuing a debt security on the basis of current market prices for other debt securities, historical trading patterns in the market for fixed-income securities and/or other factors. Non-U.S. debt securities that are listed on an exchange will be valued at the bid price obtained from an independent third party pricing service. When independent third party pricing services are unable to supply prices, or when prices or market quotations are considered to be unreliable, the value of that security may be determined using quotations from one or more broker-dealers. Securities for which independent pricing services or broker-dealers are unable to supply prices or for which market prices and/or quotations are not readily available or are considered to be unreliable are valued by a fair valuation team comprised of certain personnel of the Adviser pursuant to procedures adopted by the Fund's Board of Trustees. The Adviser's fair valuation team uses fair value methods approved by the Valuation Committee of the Board of Trustees. The Adviser's fair valuation team is responsible for monitoring developments that may impact fair valued securities and for discussing and assessing fair values on an ongoing basis, and at least quarterly, with the Valuation Committee of the Board of Trustees. 32 Pioneer Disciplined Value Fund | Annual Report | 8/31/19 Inputs used when applying fair value methods to value a security may include credit ratings, the financial condition of the company, current market conditions and comparable securities. The Fund may use fair value methods if it is determined that a significant event has occurred after the close of the exchange or market on which the security trades and prior to the determination of the Fund's net asset value. Examples of a significant event might include political or economic news, corporate restructurings, natural disasters, terrorist activity or trading halts. Thus, the valuation of the Fund's securities may differ significantly from exchange prices, and such differences could be material. At August 31, 2019, no securities were valued using fair value methods (other than securities valued using prices supplied by independent pricing services, broker-dealers or using a third party insurance industry pricing model). B. Investment Income and Transactions Dividend income is recorded on the ex-dividend date, except that certain dividends from foreign securities where the ex-dividend date may have passed are recorded as soon as the Fund becomes aware of the ex-dividend data in the exercise of reasonable diligence. Interest income, including interest on income-bearing cash accounts, is recorded on the accrual basis. Dividend and interest income are reported net of unrecoverable foreign taxes withheld at the applicable country rates and net of income accrued on defaulted securities. Interest and dividend income payable by delivery of additional shares is reclassified as PIK (payment-in-kind) income upon receipt and is included in interest and dividend income, respectively. Security transactions are recorded as of trade date. Gains and losses on sales of investments are calculated on the identified cost method for both financial reporting and federal income tax purposes. C. Federal Income Taxes It is the Fund's policy to comply with the requirements of the Internal Revenue Code applicable to regulated investment companies and to distribute all of its net taxable income and net realized capital gains, if any, to its shareowners. Therefore, no provision for federal income taxes is required. As of August 31, 2019, the Fund did not accrue any interest or penalties with respect to uncertain tax positions, which, if applicable, would be recorded as an income tax expense on the Statement of Operations. Tax returns filed within the prior three years remain subject to examination by federal and state tax authorities. Pioneer Disciplined Value Fund | Annual Report | 8/31/19 33 The amount and character of income and capital gain distributions to shareowners are determined in accordance with federal income tax rules, which may differ from U.S. GAAP. Distributions in excess of net investment income or net realized gains are temporary over distributions for financial statement purposes resulting from differences in the recognition or classification of income or distributions for financial statement and tax purposes. Capital accounts within the financial statements are adjusted for permanent book/tax differences to reflect tax character, but are not adjusted for temporary differences. The tax character of distributions paid during the years ended August 31, 2019 and August 31, 2018, were as follows: -------------------------------------------------------------------------- 2019 2018 -------------------------------------------------------------------------- Distributions paid from: Ordinary income $23,833,600 $21,696,742 Long-term capital gain 44,363,616 58,043,215 -------------------------------------------------------------------------- Total $68,197,216 $79,739,957 ========================================================================== The following shows the components of distributable earnings (losses) on a federal income tax-basis at August 31, 2019: -------------------------------------------------------------------------- 2019 -------------------------------------------------------------------------- Distributable earnings: Undistributed ordinary income $ 3,596,651 Current Year Late Year Loss (4,322,320) Net unrealized appreciation 16,283,613 -------------------------------------------------------------------------- Total $15,557,944 ========================================================================== The difference between book-basis and tax-basis net unrealized appreciation is attributable to the tax deferral of losses on wash sales and REITs. D. Fund Shares The Fund records sales and repurchases of its shares as of trade date. The Distributor earned $12,886 in underwriting commissions on the sale of Class A shares during the year ended August 31, 2019. E. Class Allocations Income, common expenses and realized and unrealized gains and losses are calculated at the Fund level and allocated daily to each class of shares based on its respective percentage of adjusted net assets at the beginning of the day. Distribution fees are calculated based on the average daily net asset value attributable to Class A, Class C and Class R shares of the Fund, respectively (see Note 4). Class Y shares do not pay distribution fees. All expenses and fees 34 Pioneer Disciplined Value Fund | Annual Report | 8/31/19 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 R and Class Y shares can reflect different transfer agent and distribution expense rates. F. Risks The value of securities held by the Fund may go up or down, sometimes rapidly or unpredictably, due to general market conditions, such as real or perceived adverse economic, political or regulatory conditions, inflation, changes in interest rates, lack of liquidity in the bond markets or adverse investor sentiment. In the past several years, financial markets have experienced increased volatility, depressed valuations, decreased liquidity and heightened uncertainty. These conditions may continue, recur, worsen or spread. A general rise in interest rates could adversely affect the price and liquidity of fixed-income securities and could also result in increased redemptions from the Fund. At times, the Fund's investments may represent industries or industry sectors that are interrelated or have common risks, making the Fund more susceptible to any economic, political, or regulatory developments or other risks affecting those industries and sectors. The Fund's investments in foreign markets and countries with limited developing markets may subject the Fund to a greater degree of risk than investments in a developed market. These risks include disruptive political or economic conditions and the imposition of adverse governmental laws or currency exchange restrictions. With the increased use of technologies such as the Internet to conduct business, the Fund is susceptible to operational, information security and related risks. While the Fund's Adviser has established business continuity plans in the event of, and risk management systems to prevent, limit or mitigate, such cyber-attacks, there are inherent limitations in such plans and systems, including the possibility that certain risks have not been identified. Furthermore, the Fund cannot control the cybersecurity plans and systems put in place by service providers to the Fund such as Brown Brothers Harriman & Co., the Fund's custodian and accounting agent, and DST Asset Manager Solutions, Inc., the Fund's transfer agent. In addition, many beneficial owners of Fund shares hold them through accounts at broker-dealers, retirement platforms and other financial market participants over which neither the Fund nor Amundi Pioneer exercises control. Each of these Pioneer Disciplined Value Fund | Annual Report | 8/31/19 35 may in turn rely on service providers to them, which are also subject to the risk of cyber-attacks. Cybersecurity failures or breaches at Amundi Pioneer or the Fund's service providers or intermediaries have the ability to cause disruptions and impact business operations, potentially resulting in financial losses, interference with the Fund's ability to calculate its net asset value, impediments to trading, the inability of Fund shareowners to effect share purchases, redemptions or exchanges or receive distributions, loss of or unauthorized access to private shareowner information and violations of applicable privacy and other laws, regulatory fines, penalties, reputational damage, or additional compliance costs. Such costs and losses may not be covered under any insurance. In addition, maintaining vigilance against cyber-attacks may involve substantial costs over time, and system enhancements may themselves be subject to cyber-attacks. The Fund's prospectus contains unaudited information regarding the Fund's principal risks. Please refer to that document when considering the Fund's principal risks. 2. Management Agreement The Adviser manages the Fund's portfolio. Management fees are calculated daily at the annual rate to 0.65% of the Fund's average daily net assets up to $1 billion, 0.60% of the next $2 billion of the Fund's average daily net assets, 0.55% of the next $4.5 billion of the Fund's average daily net assets and 0.525% of the Fund's average daily net assets over $7.5 billion. For the year ended August 31, 2019, the effective management fee (excluding waivers and/or assumption of expenses) was equivalent to 0.65% of the Fund's average daily net assets. Prior to January 1, 2019, the Adviser contractually agreed to limit ordinary operating expenses (ordinary operating expenses means all fund expenses other than extraordinary expenses, such as litigation, taxes, brokerage commissions and acquired fund fees and expenses) of the Fund to the extent required to reduce Fund expenses to 1.20%, 2.10%, 1.40% and 0.85% of the average daily net assets attributable to Class A, Class C, Class R and Class Y shares, respectively. These expense limitations are no longer in effect. Fees waived and expenses reimbursed during the year ended August 31, 2019, are reflected on the Statement of Operations. 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 $29,171 in management fees, administrative costs and certain other reimbursements payable to the Adviser at August 31, 2019. 36 Pioneer Disciplined Value Fund | Annual Report | 8/31/19 3. Transfer Agent DST Asset Manager Solutions, Inc. serves as the transfer agent to the Fund at negotiated rates. Transfer agent fees and payables shown on the Statement of Operations and the Statement of Assets and Liabilities, respectively, include sub-transfer agent expenses incurred through the Fund's omnibus relationship contracts. In addition, the Fund reimbursed the transfer agent for out-of-pocket expenses incurred by the transfer agent related to shareowner communications activities such as proxy and statement mailings, and outgoing phone calls. For the year ended August 31, 2019, such out-of-pocket expenses by class of shares were as follows: -------------------------------------------------------------------------------- Shareowner Communications: -------------------------------------------------------------------------------- Class A $62,045 Class C 12,002 Class R 2,466 Class Y 4,279 -------------------------------------------------------------------------------- Total $80,792 ================================================================================ 4. Distribution and Service Plans The Fund has adopted a distribution plan (the "Plan") pursuant to Rule 12b-1 of the Investment Company Act of 1940 with respect to its Class A, Class C and Class R shares. Pursuant to the Plan, the Fund pays the Distributor 0.25% of the average daily net assets attributable to Class A shares as compensation for personal services and/or account maintenance services or distribution services with regard to Class A shares. Pursuant to the Plan, the Fund also pays the Distributor 1.00% of the average daily net assets attributable to Class C shares. The fee for Class C shares consists of a 0.25% service fee and a 0.75% distribution fee paid as compensation for personal services and/or account maintenance services or distribution services with regard to Class C shares. Pursuant to the Plan, the Fund further pays the Distributor 0.50% of the average daily net assets attributable to Class R shares for distribution services. Included in "Due to affiliates" reflected on the Statement of Assets and Liabilities is $17,262 in distribution fees payable to the Distributor at August 31, 2019. The Fund also has adopted a separate service plan for Class R shares (the "Service Plan"). The Service Plan authorizes the Fund to pay securities dealers, plan administrators or other service organizations that agree to provide certain services to retirement plans or plan participants holding shares of the Fund a service fee of up to 0.25% of the Fund's average daily net assets attributable to Class R shares held by such plans. Pioneer Disciplined Value Fund | Annual Report | 8/31/19 37 In addition, redemptions of Class A and Class C shares may be subject to a contingent deferred sales charge ("CDSC"). A CDSC of 1.00% may be imposed on redemptions of certain net asset value purchases of Class A shares within 12 months of purchase. Redemptions of Class C shares within 12 months of purchase are subject to a CDSC of 1.00%, based on the lower of cost or market value of shares being redeemed. Shares purchased as part of an exchange remain subject to any CDSC that applied to the original purchase of those shares. There is no CDSC for Class R or Class Y shares. Proceeds from the CDSCs are paid to the Distributor. For the year ended August 31, 2019, CDSCs in the amount of $15,521 were paid to the Distributor. 5. Line of Credit Facility The Fund, along with certain other funds in the Pioneer Family of Funds (the "Funds"), participates in a committed, unsecured revolving line of credit facility. Borrowings are used solely for temporary or emergency purposes. The Fund may borrow up to the lesser of the amount available under the credit facility or the limits set for borrowing by the Fund's prospectus and the 1940 Act. Effective August 1, 2018, the Fund participates in a credit facility in the amount of $250 million. Under such facility, depending on the type of loan, interest on borrowings is payable at the London Interbank Offered Rate ("LIBOR") plus 0.90% on an annualized basis, or the Alternate Base Rate, which is the greater of (a) the facility's administrative agent's daily announced prime rate on the borrowing date, (b) 2% plus the Federal Funds Rate on the borrowing date, or (c) 2% plus the overnight Eurodollar rate on the borrowing date. The Fund pays an annual commitment fee to participate in a credit facility. The commitment fee is allocated among participating Funds based on an allocation schedule set forth in the credit agreement. For the year ended August 31, 2019, the Fund had no borrowings under the credit facility. 38 Pioneer Disciplined Value Fund | Annual Report | 8/31/19 Report of Independent Registered Public Accounting Firm To the Shareholders and Board of Trustees of Pioneer Series Trust III: -------------------------------------------------------------------------------- Opinion on the Financial Statements We have audited the accompanying statement of assets and liabilities of Pioneer Series Trust III (the "Trust") (comprising the Pioneer Disciplined Value Fund (individually referred to as the "Fund")), including the schedule of investments, as of August 31, 2019, and the related statement of operations for the year then ended, the statements changes in net assets for each of the two years in the period then ended and the financial highlights for each of the three years in the period then ended (collectively referred to as the "financial statements"). The financial highlights for the periods ended August 31, 2015 and August 31, 2016 were audited by another independent registered public accounting firm whose report, dated October 24, 2016, expressed an unqualified opinion on those financial highlights. In our opinion, the financial statements present fairly, in all material respects, the financial position of the Fund comprising Pioneer Series Trust XII at August 31, 2019, the results of its operations for the year then ended, the changes in its net assets for each of the two years in the period then ended, and the financial highlights for each of the three years in the period then ended, in conformity with U.S. generally accepted accounting principles. Basis for Opinion These financial statements are the responsibility of the Trust's management. Our responsibility is to express an opinion on the Fund's financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) ("PCAOB") and are required to be independent with respect to the Trust in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB. We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. The Trust is not required to have, nor were we engaged to perform, an audit of the Trust's internal control over financial reporting. As part of our audits, we are required to obtain an understanding of internal control over financial reporting, but not for the purpose of expressing an opinion on the effectiveness of the Trust's internal control over financial reporting. Accordingly, we express no such opinion. Pioneer Disciplined Value Fund | Annual Report | 8/31/19 39 Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our procedures included confirmation of securities owned as of August 31, 2019, by correspondence with the custodian and brokers. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion. /s/ Ernst & Young LLP We have served as the Trust's auditor since 2017. Boston, Massachusetts October 29, 2019 40 Pioneer Disciplined Value Fund | Annual Report | 8/31/19 Additional Information (unaudited) For the year ended August 31, 2019, certain dividends paid by the Fund may be subject to a maximum tax rate of 20%, 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 20%. Complete information will be computed and reported in conjunction with your 2019 form 1099-DIV. The qualifying percentage of the Fund's ordinary income dividends for the purpose of the corporate dividends received deduction was 43.41% Pioneer Disciplined Value Fund | Annual Report | 8/31/19 41 Trustees, Officers and Service Providers Investment Adviser and Administrator Amundi Pioneer Asset Management, Inc. Custodian and Sub-Administrator Brown Brothers Harriman & Co. Independent Registered Public Accounting Firm Ernst & Young LLP Principal Underwriter Amundi Pioneer Distributor, Inc. Legal Counsel Morgan, Lewis & Bockius LLP Transfer Agent DST Asset Manager Solutions, Inc. Proxy Voting Policies and Procedures of the Fund are available without charge, upon request, by calling our toll free number (1-800-225-6292). Information regarding how the Fund voted proxies relating to portfolio securities during the most recent 12-month period ended June 30 is publicly available to shareowners at www.amundipioneer.com/us. This information is also available on the Securities and Exchange Commission's web site at www.sec.gov. Trustees and Officers The Fund's Trustees and officers are listed below, together with their principal occupations and other directorships they have held during at least the past five years. Trustees who are interested persons of the Fund within the meaning of the 1940 Act are referred to as Interested Trustees. Trustees who are not interested persons of the Fund are referred to as Independent Trustees. Each of the Trustees, except Mr. Bock and Ms. Durnin, serve as Trustees of each of the 44 U.S. registered investment portfolios for which Amundi Pioneer serves as investment adviser (the "Pioneer Funds"). Mr. Bock and Ms. Durnin serve as a Trustee of 37 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. 42 Pioneer Disciplined Value Fund | Annual Report | 8/31/19 Independent Trustees Name, Age and Position Term of Office and Other Directorships Held With the Fund Length of Service Principal Occupation Held by Trustee ------------------------------------------------------------------------------------------------------------------------------------ Thomas J. Perna (68) Trustee since 2006. Private investor (2004 - 2008 and Director, Broadridge Chairman of the Board Serves until a successor 2013 - present); Chairman (2008 - 2013) Financial Solutions, and Trustee trustee is elected or earlier and Chief Executive Officer (2008 - Inc. (investor retirement or removal. 2012), Quadriserv, Inc. (technology communications and products for securities lending industry); securities processing and Senior Executive Vice President, The provider for financial Bank of New York (financial and securities services industry) services) (1986 - 2004) (2009 - present); Director, Quadriserv, Inc. (2005 - 2013); and Commissioner, New Jersey State Civil Service Commission (2011 - 2015) ------------------------------------------------------------------------------------------------------------------------------------ John E. Baumgardner, Trustee since 2019. Of Counsel (2019 - present), Partner Chairman, The Lakeville Jr. (68) Serves until a successor (1983-2018), Sullivan & Cromwell LLP Journal Company, LLC, Trustee trustee is elected or earlier (law firm). (privately-held community retirement or removal. newspaper group) (2015-present) ------------------------------------------------------------------------------------------------------------------------------------ David R. Bock (75) Trustee since 2005. Managing Partner, Federal City Capital Director of New York Trustee Serves until a successor Advisors (corporate advisory services Mortgage Trust (publicly- trustee is elected or earlier company) (1997 - 2004 and 2008 - present); traded mortgage REIT) retirement or removal. Interim Chief Executive Officer, Oxford (2004 - 2009, 2012 - Analytica, Inc. (privately held research present); Director of The and consulting company) (2010); Executive Swiss Helvetia Fund, Inc. Vice President and Chief Financial closed-end fund) (2010 - Officer, I-trax, Inc. (publicly traded 2017); Director of Oxford health care services company) (2004 - Analytica, Inc. (2008 - 2007); and Executive Vice President and 2015); and Director of Chief Financial Officer, Pedestal Inc. Enterprise Community (internet-based mortgage trading company) Investment, Inc. (2000 - 2002); Private Consultant (1995 - (privately-held affordable 1997); Managing Director, Lehman Brothers housing finance company) (1992 - 1995); and Executive, The World (1985 - 2010) Bank (1979 - 1992) ------------------------------------------------------------------------------------------------------------------------------------ Pioneer Disciplined Value Fund | Annual Report | 8/31/19 43 Independent Trustees (continued) Name, Age and Position Term of Office and Other Directorships Held With the Fund Length of Service Principal Occupation Held by Trustee ------------------------------------------------------------------------------------------------------------------------------------ Diane Durnin (62) Trustee since 2019. Managing Director - Head of Product None Trustee Serves until a successor Strategy and Development, BNY Mellon trustee is elected or earlier Investment Management (2012-2018); Vice retirement or removal. Chairman - The Dreyfus Corporation (2005 - 2018): Executive Vice President Head of Product, BNY Mellon Investment Management (2007-2012); Executive Director- Product Strategy, Mellon Asset Management (2005-2007); Executive Vice President Head of Products, Marketing and Client Service, Dreyfus Corporation (2000-2005); and Senior Vice President Strategic Product and Business Development, Dreyfus Corporation (1994-2000) ------------------------------------------------------------------------------------------------------------------------------------ Benjamin M. Friedman (75) Trustee since 2008. William Joseph Maier Professor of Trustee, Mellon Trustee Serves until a successor Political Economy, Harvard University Institutional Funds trustee is elected or earlier (1972 - present) Investment Trust and retirement or removal. Mellon Institutional Funds Master Portfolio (oversaw 17 portfolios in fund complex) (1989 - 2008) ------------------------------------------------------------------------------------------------------------------------------------ Margaret B.W. Graham (72) Trustee since 2004. Founding Director, Vice-President and None Trustee Serves until a successor Corporate Secretary, The Winthrop Group, trustee is elected or earlier Inc. (consulting firm) (1982 - present); retirement or removal. Desautels Faculty of Management, McGill University (1999 - 2017); and Manager of Research Operations and Organizational Learning, Xerox PARC, Xerox's advance research center (1990-1994) ------------------------------------------------------------------------------------------------------------------------------------ Lorraine H. Monchak (62) Trustee since 2017. Chief Investment Officer, 1199 SEIU Funds None Trustee (Advisory Trustee from (healthcare workers union pension 2014 - 2017) Serves funds) (2001 - present); Vice President - until a successor trustee International Investments Group, American is elected or earlier International Group, Inc. (insurance retirement or removal. 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) ------------------------------------------------------------------------------------------------------------------------------------ 44 Pioneer Disciplined Value Fund | Annual Report | 8/31/19 Name, Age and Position Term of Office and Other Directorships Held With the Fund Length of Service Principal Occupation Held by Trustee ------------------------------------------------------------------------------------------------------------------------------------ Marguerite A. Piret (71) Trustee since 2004. President and Chief Executive Officer, Director of New America Trustee Serves until a successor Metric Financial Inc. (formerly known as High Income Fund, Inc. trustee is elected or earlier Newbury Piret Company) (investment banking (closed-end investment retirement or removal. firm) (1981 - present) company) (2004 - present); and Member, Board of Governors, Investment Company Institute (2000 - 2006) ------------------------------------------------------------------------------------------------------------------------------------ Fred J. Ricciardi (72) Trustee since 2014. Consultant (investment company services) None Trustee Serves until a successor (2012 - present); Executive Vice President, trustee is elected or earlier BNY Mellon (financial and investment retirement or removal. company services) (1969 - 2012); Director, BNY International Financing Corp. (financial services) (2002 - 2012); Director, Mellon Overseas Investment Corp. (financial services) (2009 - 2012); Director, Financial Models (technology) (2005-2007); Director, BNY Hamilton Funds, Ireland (offshore investment companies) (2004-2007); Chairman/Director, AIB/BNY Securities Services, Ltd., Ireland (financial services) (1999-2006); and Chairman, BNY Alternative Investment Services, Inc. (financial services) (2005-2007) ------------------------------------------------------------------------------------------------------------------------------------ Pioneer Disciplined Value Fund | Annual Report | 8/31/19 45 Interested Trustees Name, Age and Position Term of Office and Other Directorships Held With the Fund Length of Service Principal Occupation Held by Trustee ------------------------------------------------------------------------------------------------------------------------------------ Lisa M. Jones (57)* Trustee since 2017. Director, CEO and President of Amundi None Trustee, President and Serves until a successor Pioneer Asset Management USA, Inc. (since Chief Executive Officer trustee is elected or earlier September 2014); Director, CEO and retirement or removal President of Amundi Pioneer Asset Management, Inc. (since September 2014); Director, CEO and President of Amundi Pioneer Distributor, Inc. (since September 2014); Director, CEO and President of Amundi Pioneer Institutional Asset Management, Inc. (since September 2014); Chair, Amundi Pioneer Asset Management USA, Inc., Amundi Pioneer Distributor, Inc. and Amundi Pioneer Institutional Asset Management, Inc. (September 2014 - 2018); Managing Director, Morgan Stanley Investment Management (2010 - 2013); Director of Institutional Business, CEO of International, Eaton Vance Management (2005 - 2010); and Director of Amundi USA, Inc. (since 2017) ------------------------------------------------------------------------------------------------------------------------------------ Kenneth J. Taubes (61)* Trustee since 2014. Director and Executive Vice President None Trustee Serves until a successor (since 2008) and Chief Investment Officer, trustee is elected or earlier U.S. (since 2010) of Amundi Pioneer Asset retirement or removal Management USA, Inc.; Director and Executive Vice President and Chief Investment Officer, U.S. of Amundi Pioneer (since 2008); Executive Vice President and Chief Investment Officer, U.S. of Amundi Pioneer Institutional Asset Management, Inc. (since 2009); Portfolio Manager of Amundi Pioneer (since 1999); and Director of Amundi USA, Inc. (since 2017) ------------------------------------------------------------------------------------------------------------------------------------ * Ms. Jones and Mr. Taubes are Interested Trustees because they are officers or directors of the Fund's investment adviser and certain of its affiliates. 46 Pioneer Disciplined Value Fund | Annual Report | 8/31/19 Fund Officers Name, Age and Position Term of Office and Other Directorships Held With the Fund Length of Service Principal Occupation Held by Officer ------------------------------------------------------------------------------------------------------------------------------------ Christopher J. Since 2004. Serves at the Vice President and Associate General None Kelley (54) discretion of the Board Counsel of Amundi Pioneer since January Secretary and 2008; Secretary and Chief Legal Officer of Chief Legal Officer all of the Pioneer Funds since June 2010; Assistant Secretary of all of the Pioneer Funds from September 2003 to May 2010; and Vice President and Senior Counsel of Amundi Pioneer from July 2002 to December 2007 ------------------------------------------------------------------------------------------------------------------------------------ Carol B. Hannigan (58) Since 2010. Serves at the Fund Governance Director of Amundi Pioneer None Assistant Secretary discretion of the Board since December 2006 and Assistant Secretary of all the Pioneer Funds since June 2010; Manager - Fund Governance of Amundi Pioneer from December 2003 to November 2006; and Senior Paralegal of Amundi Pioneer from January 2000 to November 2003 ------------------------------------------------------------------------------------------------------------------------------------ Thomas Reyes (56) Since 2010. Serves at the Senior Counsel of Amundi Pioneer since May None Assistant Secretary discretion of the Board 2013 and Assistant Secretary of all the Pioneer Funds since June 2010; and Counsel of Amundi Pioneer from June 2007 to May 2013 ------------------------------------------------------------------------------------------------------------------------------------ Mark E. Bradley (59) Since 2008. Serves at the Vice President - Fund Treasury of Amundi None Treasurer and discretion of the Board Pioneer; Treasurer of all of the Pioneer Chief Financial and Funds since March 2008; Deputy Treasurer Accounting Officer of Amundi Pioneer from March 2004 to February 2008; and Assistant Treasurer of all of the Pioneer Funds from March 2004 to February 2008 ------------------------------------------------------------------------------------------------------------------------------------ Luis I. Presutti (54) Since 2004. Serves at the Director - Fund Treasury of Amundi None Assistant Treasurer discretion of the Board Pioneer; and Assistant Treasurer of all of the Pioneer Funds ------------------------------------------------------------------------------------------------------------------------------------ Gary Sullivan (61) Since 2004. Serves at the Senior Manager - Fund Treasury of Amundi None Assistant Treasurer discretion of the Board Pioneer; and Assistant Treasurer of all of the Pioneer Funds ------------------------------------------------------------------------------------------------------------------------------------ David F. Johnson (39) Since 2009. Serves at the Senior Manager - Fund Treasury of Amundi None Assistant Treasurer discretion of the Board 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 ------------------------------------------------------------------------------------------------------------------------------------ Pioneer Disciplined Value Fund | Annual Report | 8/31/19 47 Fund Officers (continued) Name, Age and Position Term of Office and Other Directorships Held With the Fund Length of Service Principal Occupation Held by Officer ------------------------------------------------------------------------------------------------------------------------------------ John Malone (48) Since 2018. Serves at the Managing Director, Chief Compliance None Chief Compliance Officer discretion of the Board Officer of Amundi Pioneer Asset Management; Amundi Pioneer Institutional Asset Management, Inc.; and the Pioneer Funds since September 2018; and Chief Compliance Officer of Amundi Pioneer Distributor, Inc. since January 2014 ------------------------------------------------------------------------------------------------------------------------------------ Kelly O'Donnell (48) Since 2006. Serves at the Vice President - Amundi Pioneer Asset None Anti-Money discretion of the Board Management; and Anti-Money Laundering Laundering Officer Officer of all the Pioneer Funds since 2006 ------------------------------------------------------------------------------------------------------------------------------------ 48 Pioneer Disciplined Value Fund | Annual Report | 8/31/19 This page is for your notes. Pioneer Disciplined Value Fund | Annual Report | 8/31/19 49 This page is for your notes. 50 Pioneer Disciplined Value Fund | Annual Report | 8/31/19 This page is for your notes. Pioneer Disciplined Value Fund | Annual Report | 8/31/19 51 This page is for your notes. 52 Pioneer Disciplined Value Fund | Annual Report | 8/31/19 How to Contact Amundi Pioneer We are pleased to offer a variety of convenient ways for you to contact us for assistance or information. Call us for: -------------------------------------------------------------------------------- Account Information, including existing accounts, new accounts, prospectuses, applications and service forms 1-800-225-6292 FactFoneSM for automated fund yields, prices, account information and transactions 1-800-225-4321 Retirement plans information 1-800-622-0176 Write to us: -------------------------------------------------------------------------------- Amundi Pioneer P.O. Box 219427 Kansas City, MO 64121-9427 Our toll-free fax 1-800-225-4240 Our internet e-mail address us.askamundipioneer@amundipioneer.com (for general questions about Amundi Pioneer only) Visit our web site: www.amundipioneer.com/us This report must be preceded or accompanied by a prospectus. The Fund files a complete schedule of portfolio holdings with the Securities and Exchange Commission for the first and third quarters of each fiscal year as an exhibit to its reports on Form N-PORT. Shareholders may view the filed Form N-PORT by visiting the Commission's web site at https://www.sec.gov. [LOGO] Amundi Pioneer ============== ASSET MANAGEMENT Amundi Pioneer Asset Management, Inc. 60 State Street Boston, MA 02109 www.amundipioneer.com/us Securities offered through Amundi Pioneer Distributor, Inc. 60 State Street, Boston, MA 02109 Underwriter of Pioneer Mutual Funds, Member SIPC [C] 2019 Amundi Pioneer Asset Management 19429-13-1019 ITEM 2. CODE OF ETHICS. (a) Disclose whether, as of the end of the period covered by the report, the registrant has adopted a code of ethics that applies to the registrant's principal executive officer, principal financial officer, principal accounting officer or controller, or persons performing similar functions, regardless of whether these individuals are employed by the registrant or a third party. If the registrant has not adopted such a code of ethics, explain why it has not done so. The registrant has adopted, as of the end of the period covered by this report, a code of ethics that applies to the registrant's principal executive officer, principal financial officer, principal accounting officer and controller. (b) For purposes of this Item, the term "code of ethics" means written standards that are reasonably designed to deter wrongdoing and to promote: (1) Honest and ethical conduct, including the ethical handling of actual or apparent conflicts of interest between personal and professional relationships; (2) Full, fair, accurate, timely, and understandable disclosure in reports and documents that a registrant files with, or submits to, the Commission and in other public communications made by the registrant; (3) Compliance with applicable governmental laws, rules, and regulations; (4) The prompt internal reporting of violations of the code to an appropriate person or persons identified in the code; and (5) Accountability for adherence to the code. (c) The registrant must briefly describe the nature of any amendment, during the period covered by the report, to a provision of its code of ethics that applies to the registrant's principal executive officer, principal financial officer, principal accounting officer or controller, or persons performing similar functions, regardless of whether these individuals are employed by the registrant or a third party, and that relates to any element of the code of ethics definition enumerated in paragraph (b) of this Item. The registrant must file a copy of any such amendment as an exhibit pursuant to Item 10(a), unless the registrant has elected to satisfy paragraph (f) of this Item by posting its code of ethics on its website pursuant to paragraph (f)(2) of this Item, or by undertaking to provide its code of ethics to any person without charge, upon request, pursuant to paragraph (f)(3) of this Item. The registrant has made no amendments to the code of ethics during the period covered by this report. (d) If the registrant has, during the period covered by the report, granted a waiver, including an implicit waiver, from a provision of the code of ethics to the registrant's principal executive officer, principal financial officer, principal accounting officer or controller, or persons performing similar functions, regardless of whether these individuals are employed by the registrant or a third party, that relates to one or more of the items set forth in paragraph (b) of this Item, the registrant must briefly describe the nature of the waiver, the name of the person to whom the waiver was granted, and the date of the waiver. Not applicable. (e) If the registrant intends to satisfy the disclosure requirement under paragraph (c) or (d) of this Item regarding an amendment to, or a waiver from, a provision of its code of ethics that applies to the registrant's principal executive officer, principal financial officer, principal accounting officer or controller, or persons performing similar functions and that relates to any element of the code of ethics definition enumerated in paragraph (b) of this Item by posting such information on its Internet website, disclose the registrant's Internet address and such intention. Not applicable. (f) The registrant must: (1) File with the Commission, pursuant to Item 12(a)(1), a copy of its code of ethics that applies to the registrant's principal executive officer,principal financial officer, principal accounting officer or controller, or persons performing similar functions, as an exhibit to its annual report on this Form N-CSR (see attachment); (2) Post the text of such code of ethics on its Internet website and disclose, in its most recent report on this Form N-CSR, its Internet address and the fact that it has posted such code of ethics on its Internet website; or (3) Undertake in its most recent report on this Form N-CSR to provide to any person without charge, upon request, a copy of such code of ethics and explain the manner in which such request may be made. 	See Item 10(2) ITEM 3. AUDIT COMMITTEE FINANCIAL EXPERT. (a) (1) Disclose that the registrant's board of trustees has determined that the registrant either: (i) Has at least one audit committee financial expert serving on its audit committee; or (ii) Does not have an audit committee financial expert serving on its audit committee. The registrant's Board of Trustees has determined that the registrant has at least one audit committee financial expert. (2) If the registrant provides the disclosure required by paragraph (a)(1)(i) of this Item, it must disclose the name of the audit committee financial expert and whether that person is "independent." In order to be considered "independent" for purposes of this Item, a member of an audit committee may not, other than in his or her capacity as a member of the audit committee, the board of trustees, or any other board committee: (i) Accept directly or indirectly any consulting, advisory, or other compensatory fee from the issuer; or (ii) Be an "interested person" of the investment company as defined in Section 2(a)(19) of the Act (15 U.S.C. 80a-2(a)(19)). Mr. David R. Bock, an independent trustee, is such an audit committee financial expert. (3) If the registrant provides the disclosure required by paragraph (a)(1) (ii) of this Item, it must explain why it does not have an audit committee financial expert. Not applicable. ITEM 4. PRINCIPAL ACCOUNTANT FEES AND SERVICES. (a) Disclose, under the caption AUDIT FEES, the aggregate fees billed for each of the last two fiscal years for professional services rendered by the principal accountant for the audit of the registrant's annual financial statements or services that are normally provided by the accountant in connection with statutory and regulatory filings or engagements for those fiscal years. The audit fees for the Trust were $23,000 payable to Ernst & Young LLP for the year ended August 31, 2019 and $23,000 for the year ended August 31, 2018. (b) Disclose, under the caption AUDIT-RELATED FEES, the aggregate fees billed in each of the last two fiscal years for assurance and related services by the principal accountant that are reasonably related to the performance of the audit of the registrant's financial statements and are not reported under paragraph (a) of this Item. Registrants shall describe the nature of the services comprising the fees disclosed under this category. Audit-Related Fees There were no audit-related services in 2019 or 2018. (c) Disclose, under the caption TAX FEES, the aggregate fees billed in each of the last two fiscal years for professional services rendered by the principal accountant for tax compliance, tax advice, and tax planning. Registrants shall describe the nature of the services comprising the fees disclosed under this category. The tax fees for the Trust were $8,028 payable to Ernst & Young LLP for the year ended August 31, 2019 and $8,028 for the year ended August 31, 2018. (d) Disclose, under the caption ALL OTHER FEES, the aggregate fees billed in each of the last two fiscal years for products and services provided by the principal accountant, other than the services reported in paragraphs (a) through (c) of this Item. Registrants shall describe the nature of the services comprising the fees disclosed under this category. Pioneer Disciplined Value Fund: Other Fees There were no other fees in 2019 or 2018. (e) (1) Disclose the audit committee's pre-approval policies and procedures described in paragraph (c)(7) of Rule 2-01 of Regulation S-X. PIONEER FUNDS APPROVAL OF AUDIT, AUDIT-RELATED, TAX AND OTHER SERVICES PROVIDED BY THE INDEPENDENT AUDITOR SECTION I - POLICY PURPOSE AND APPLICABILITY The Pioneer Funds recognize the importance of maintaining the independence of their outside auditors. Maintaining independence is a shared responsibility involving Amudi Pioneer Asset Management, Inc, the audit committee and the independent auditors. The Funds recognize that a Fund's independent auditors: 1) possess knowledge of the Funds, 2) are able to incorporate certain services into the scope of the audit, thereby avoiding redundant work, cost and disruption of Fund personnel and processes, and 3) have expertise that has value to the Funds. As a result, there are situations where it is desirable to use the Fund's independent auditors for services in addition to the annual audit and where the potential for conflicts of interests are minimal. Consequently, this policy, which is intended to comply with Rule 210.2-01(C)(7), sets forth guidelines and procedures to be followed by the Funds when retaining the independent audit firm to perform audit, audit-related tax and other services under those circumstances, while also maintaining independence. Approval of a service in accordance with this policy for a Fund shall also constitute approval for any other Fund whose pre-approval is required pursuant to Rule 210.2-01(c)(7)(ii). In addition to the procedures set forth in this policy, any non-audit services that may be provided consistently with Rule 210.2-01 may be approved by the Audit Committee itself and any pre-approval that may be waived in accordance with Rule 210.2-01(c)(7)(i)(C) is hereby waived. Selection of a Fund's independent auditors and their compensation shall be determined by the Audit Committee and shall not be subject to this policy. SECTION II - POLICY ---------------- -------------------------------- ------------------------------------------------- SERVICE SERVICE CATEGORY DESCRIPTION SPECIFIC PRE-APPROVED SERVICE SUBCATEGORIES CATEGORY ---------------- -------------------------------- ------------------------------------------------- I. AUDIT Services that are directly o Accounting research assistance SERVICES related to performing the o SEC consultation, registration independent audit of the Funds statements, and reporting o Tax accrual related matters o Implementation of new accounting standards o Compliance letters (e.g. rating agency letters) o Regulatory reviews and assistance regarding financial matters o Semi-annual reviews (if requested) o Comfort letters for closed end offerings ---------------- -------------------------------- ------------------------------------------------- II. Services which are not o AICPA attest and agreed-upon procedures AUDIT-RELATED prohibited under Rule o Technology control assessments SERVICES 210.2-01(C)(4) (the "Rule") o Financial reporting control assessments and are related extensions of o Enterprise security architecture the audit services support the assessment audit, or use the knowledge/expertise gained from the audit procedures as a foundation to complete the project. In most cases, if the Audit-Related Services are not performed by the Audit firm, the scope of the Audit Services would likely increase. The Services are typically well-defined and governed by accounting professional standards (AICPA, SEC, etc.) ---------------- -------------------------------- ------------------------------------------------- ------------------------------------- ------------------------------------ AUDIT COMMITTEE APPROVAL POLICY AUDIT COMMITTEE REPORTING POLICY ------------------------------------- ------------------------------------ o "One-time" pre-approval o A summary of all such for the audit period for all services and related fees pre-approved specific service reported at each regularly subcategories. Approval of the scheduled Audit Committee independent auditors as meeting. auditors for a Fund shall constitute pre approval for these services. ------------------------------------- ------------------------------------ o "One-time" pre-approval o A summary of all such for the fund fiscal year within services and related fees a specified dollar limit (including comparison to for all pre-approved specified dollar limits) specific service subcategories reported quarterly. o Specific approval is needed to exceed the pre-approved dollar limit for these services (see general Audit Committee approval policy below for details on obtaining specific approvals) o Specific approval is needed to use the Fund's auditors for Audit-Related Services not denoted as "pre-approved", or to add a specific service subcategory as "pre-approved" ------------------------------------- ------------------------------------ SECTION III - POLICY DETAIL, CONTINUED ----------------------- --------------------------- ----------------------------------------------- SERVICE CATEGORY SERVICE CATEGORY SPECIFIC PRE-APPROVED SERVICE SUBCATEGORIES DESCRIPTION ----------------------- --------------------------- ----------------------------------------------- III. TAX SERVICES Services which are not o Tax planning and support prohibited by the Rule, o Tax controversy assistance if an officer of the Fund o Tax compliance, tax returns, excise determines that using the tax returns and support Fund's auditor to provide o Tax opinions these services creates significant synergy in the form of efficiency, minimized disruption, or the ability to maintain a desired level of confidentiality. ----------------------- --------------------------- ----------------------------------------------- ------------------------------------- ------------------------- AUDIT COMMITTEE APPROVAL POLICY AUDIT COMMITTEE REPORTING POLICY ------------------------------------- ------------------------- ------------------------------------- ------------------------- o "One-time" pre-approval o A summary of for the fund fiscal year all such services and within a specified dollar limit related fees 				 (including comparison 			 to specified dollar 			 limits) reported 			 quarterly. o Specific approval is needed to exceed the pre-approved dollar limits for these services (see general Audit Committee approval policy below for details on obtaining specific approvals) o Specific approval is needed to use the Fund's auditors for tax services not denoted as pre-approved, or to add a specific service subcategory as "pre-approved" ------------------------------------- ------------------------- SECTION III - POLICY DETAIL, CONTINUED ----------------------- --------------------------- ----------------------------------------------- SERVICE CATEGORY SERVICE CATEGORY SPECIFIC PRE-APPROVED SERVICE SUBCATEGORIES DESCRIPTION ----------------------- --------------------------- ----------------------------------------------- IV. OTHER SERVICES Services which are not o Business Risk Management support prohibited by the Rule, o Other control and regulatory A. SYNERGISTIC, if an officer of the Fund compliance projects UNIQUE QUALIFICATIONS determines that using the Fund's auditor to provide these services creates significant synergy in the form of efficiency, minimized disruption, the ability to maintain a desired level of confidentiality, or where the Fund's auditors posses unique or superior qualifications to provide these services, resulting in superior value and results for the Fund. ----------------------- --------------------------- ----------------------------------------------- --------------------------------------- ------------------------ AUDIT COMMITTEE APPROVAL POLICY AUDIT COMMITTEE REPORTING POLICY ------------------------------------- -------------------------- o "One-time" pre-approval o A summary of for the fund fiscal year within all such services and a specified dollar limit related fees 			 (including comparison 			 to specified dollar 				 limits) reported quarterly. o Specific approval is needed to exceed the pre-approved dollar limits for these services (see general Audit Committee approval policy below for details on obtaining specific approvals) o Specific approval is needed to use the Fund's auditors for "Synergistic" or "Unique Qualifications" Other Services not denoted as pre-approved to the left, or to add a specific service subcategory as "pre-approved" ------------------------------------- -------------------------- SECTION III - POLICY DETAIL, CONTINUED ----------------------- ------------------------- ----------------------------------------------- SERVICE CATEGORY SERVICE CATEGORY SPECIFIC PROHIBITED SERVICE SUBCATEGORIES DESCRIPTION ----------------------- ------------------------- ----------------------------------------------- PROHIBITED SERVICES Services which result 1. Bookkeeping or other services in the auditors losing related to the accounting records or independence status financial statements of the audit under the Rule. client* 2. Financial information systems design and implementation* 3. Appraisal or valuation services, fairness* opinions, or contribution-in-kind reports 4. Actuarial services (i.e., setting actuarial reserves versus actuarial audit work)* 5. Internal audit outsourcing services* 6. Management functions or human resources 7. Broker or dealer, investment advisor, or investment banking services 8. Legal services and expert services unrelated to the audit 9. Any other service that the Public Company Accounting Oversight Board determines, by regulation, is impermissible ----------------------- ------------------------- ----------------------------------------------- ------------------------------------------- ------------------------------ AUDIT COMMITTEE APPROVAL POLICY AUDIT COMMITTEE REPORTING POLICY ------------------------------------------- ------------------------------ o These services are not to be o A summary of all performed with the exception of the(*) services and related services that may be permitted fees reported at each if they would not be subject to audit regularly scheduled procedures at the audit client (as Audit Committee meeting defined in rule 2-01(f)(4)) level will serve as continual the firm providing the service. confirmation that has 				 not provided any restricted services. ------------------------------------------- ------------------------------ -------------------------------------------------------------------------------- GENERAL AUDIT COMMITTEE APPROVAL POLICY: o For all projects, the officers of the Funds and the Fund's auditors will each make an assessment to determine that any proposed projects will not impair independence. o Potential services will be classified into the four non-restricted service categories and the "Approval of Audit, Audit-Related, Tax and Other Services" Policy above will be applied. Any services outside the specific pre-approved service subcategories set forth above must be specifically approved by the Audit Committee. o At least quarterly, the Audit Committee shall review a report summarizing the services by service category, including fees, provided by the Audit firm as set forth in the above policy. -------------------------------------------------------------------------------- (2) Disclose the percentage of services described in each of paragraphs (b) through (d) of this Item that were approved by the audit committee pursuant to paragraph (c)(7)(i)(C) of Rule 2-01 of Regulation S-X. Non-Audit Services Beginning with non-audit service contracts entered into on or after May 6, 2003, the effective date of the new SEC pre-approval rules, the Trust's audit committee is required to pre-approve services to affiliates defined by SEC rules to the extent that the services are determined to have a direct impact on the operations or financial reporting of the Trust. For the years ended August 31 2019 and 2018, there were no services provided to an affiliate that required the Trust's audit committee pre-approval. (f) If greater than 50 percent, disclose the percentage of hours expended on the principal accountants engagement to audit the registrant's financial statements for the most recent fiscal year that were attributed to work performed by persons other than the principal accountant's full-time, permanent employees. N/A (g) Disclose the aggregate non-audit fees billed by the registrants accountant for services rendered to the registrant, and rendered to the registrants investment adviser (not including any sub-adviser whose role is primarily portfolio management and is subcontracted with or overseen by another investment adviser), and any entity controlling, controlled by, or under common control with the adviser that provides ongoing services to the registrant for each of the last two fiscal years of the registrant. The aggregate non-audit fees for the Trust were $8,028 payable to Ernst & Young LLP for the year ended August 31, 2019 and $8,028 for the year ended August 31, 2018. (h) Disclose whether the registrants audit committee of the board of trustees has considered whether the provision of non-audit services that were rendered to the registrants investment adviser (not including any subadviser whose role is primarily portfolio management and is subcontracted with or overseen by another investment adviser), and any entity controlling, controlled by, or under common control with the investment adviser that provides ongoing services to the registrant that were not pre-approved pursuant to paragraph (c)(7)(ii) of Rule 2-01 of Regulation S-X is compatible with maintaining the principal accountant's independence. The Fund's audit committee of the Board of Trustees has considered whether the provision of non-audit services that were rendered to the Affiliates (as defined) that were not pre- approved pursuant to paragraph (c)(7)(ii) of Rule 2-01 of Regulation S-X is compatible with maintaining the principal accountant's independence. ITEM 5. AUDIT COMMITTEE OF LISTED REGISTRANTS (a) If the registrant is a listed issuer as defined in Rule 10A-3 under the Exchange Act (17 CFR 240.10A-3), state whether or not the registrant has a separately-designated standing audit committee established in accordance with Section 3(a)(58)(A) of the Exchange Act (15 U.S.C. 78c(a)(58)(A)). If the registrant has such a committee, however designated, identify each committee member. If the entire board of directors is acting as the registrant's audit committee as specified in Section 3(a)(58)(B) of the Exchange Act (15 U.S.C. 78c(a)(58)(B)), so state. N/A (b) If applicable, provide the disclosure required by Rule 10A-3(d) under the Exchange Act (17 CFR 240.10A-3(d)) regarding an exemption from the listing standards for audit committees. N/A ITEM 6. SCHEDULE OF INVESTMENTS. File Schedule of Investments in securities of unaffiliated issuers as of the close of the reporting period as set forth in 210.1212 of Regulation S-X [17 CFR 210.12-12], unless the schedule is included as part of the report to shareholders filed under Item 1 of this Form. Included in Item 1 ITEM 7. DISCLOSURE OF PROXY VOTING POLICIES AND PROCEDURES FOR CLOSED-END MANAGEMENT INVESTMENT COMPANIES. A closed-end management investment company that is filing an annual report on this Form N-CSR must, unless it invests exclusively in non-voting securities, describe the policies and procedures that it uses to determine how to vote proxies relating to portfolio securities, including the procedures that the company uses when a vote presents a conflict between the interests of its shareholders, on the one hand, and those of the company's investment adviser; principal underwriter; or any affiliated person (as defined in Section 2(a)(3) of the Investment Company Act of 1940 (15 U.S.C. 80a-2(a)(3)) and the rules thereunder) of the company, its investment adviser, or its principal underwriter, on the other. Include any policies and procedures of the company's investment adviser, or any other third party, that the company uses, or that are used on the company's behalf, to determine how to vote proxies relating to portfolio securities. Not applicable to open-end management investment companies. ITEM 8. PORTFOLIO MANAGERS OF CLOSED-END MANAGEMENT INVESTMENT COMPANIES. (a) If the registrant is a closed-end management investment company that is filing an annual report on this Form N-CSR,provide the following information: (1) State the name, title, and length of service of the person or persons employed by or associated with the registrant or an investment adviser of the registrant who are primarily responsible for the day-to-day management of the registrant's portfolio ("Portfolio Manager"). Also state each Portfolio Manager's business experience during the past 5 years. Not applicable to open-end management investment companies. ITEM 9. PURCHASES OF EQUITY SECURITIES BY CLOSED-END MANAGEMENT INVESTMENT COMPANY AND AFFILIATED PURCHASERS. (a) If the registrant is a closed-end management investment company, in the following tabular format, provide the information specified in paragraph (b) of this Item with respect to any purchase made by or on behalf of the registrant or any affiliated purchaser, as defined in Rule 10b-18(a)(3) under the Exchange Act (17 CFR 240.10b-18(a)(3)), of shares or other units of any class of the registrant's equity securities that is registered by the registrant pursuant to Section 12 of the Exchange Act (15 U.S.C. 781). Not applicable to open-end management investment companies. ITEM 10. SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS. Describe any material changes to the procedures by which shareholders may recommend nominees to the registrant's board of directors, where those changes were implemented after the registrant last provided disclosure in response to the requirements of Item 407(c)(2)(iv) of Regulation S-R(17 CFR 229.407)(as required by Item 22(b)(15)) of Schedule 14A (17 CFR 240.14a-101), or this Item. There have been no material changes to the procedures by which the shareholders may recommend nominees to the registrant's board of directors since the registrant last provided disclosure in response to the requirements of Item 407(c)(2)(iv) of Regulation S-R of Schedule 14(A) in its definitive proxy statement, or this item. ITEM 11. CONTROLS AND PROCEDURES. (a) Disclose the conclusions of the registrant's principal executive and principal financials officers, or persons performing similar functions, regarding the effectiveness of the registrant's disclosure controls and procedures (as defined in Rule 30a-3(c) under the Act (17 CFR 270.30a-3(c))) as of a date within 90 days of the filing date of the report that includes the disclosure required by this paragraph, based on the evaluation of these controls and procedures required by Rule 30a-3(b) under the Act (17 CFR 270.30(a)-3(b) and Rules 13a-15(b) or 15d-15(b) under the Exchange Act (17 CFR 240.13a-15(b) or 240.15d-15(b)). The registrant's principal executive officer and principal financial officer have concluded that the registrant's disclosure controls and procedures are effective based on the evaluation of these controls and procedures as of a date within 90 days of the filing date of this report. (b) Disclose any change in the registrant's internal control over financial reporting (as defined in Rule 30a-3(d) under the Act (17CFR 270.30a-3(d)) that occured during the second fiscal quarter of the period covered by this report that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting. There were no significant changes in the registrant's internal control over financial reporting that occurred during the second fiscal quarter of the period covered by this report that have materially affected, or are reasonably likely to materially affect, the registrant's internal control over financial reporting. The registrant's principal executive officer and principal financial officer, however, voluntarily are reporting the following information: In August of 2006 the registrant's investment adviser enhanced its internal procedures for reporting performance information required to be included in prospectuses. Those enhancements involved additional internal controls over the appropriateness of performance data generated for this purpose. Such enhancements were made following an internal review which identified prospectuses relating to certain classes of shares of a limited number of registrants where, inadvertently, performance information not reflecting the deduction of applicable sales charges was included. Those prospectuses were revised, and the revised prospectuses were distributed to shareholders. Item 12. Disclosure of Securities Lending Activities for Closed-End Management Investment Companies. (a) If the registrant is a closed-end management investment company, provide the following dollar amounts of income and compensation related to the securities lending activities of the registrant during its most recent fiscal year: N/A (1) Gross income from securities lending activities; N/A (2) All fees and/or compensation for each of the following securities lending activities and related services: any share of revenue generated by the securities lending program paid to the securities lending agent(s) (revenue split); fees paid for cash collateral management services (including fees deducted from a pooled cash collateral reinvestment vehicle) that are not included in the revenue split; administrative fees that are not included in the revenue split; fees for indemnification that are not included in the revenue split; rebates paid to borrowers; and any other fees relating to the securities lending program that are not included in the revenue split, including a description of those other fees; N/A (3) The aggregate fees/compensation disclosed pursuant to paragraph (2); and N/A (4) Net income from securities lending activities (i.e., the dollar amount in paragraph (1) minus the dollar amount in paragraph (3)). If a fee for a service is included in the revenue split, state that the fee is included in the revenue split. N/A (b) If the registrant is a closed-end management investment company, describe the services provided to the registrant by the securities lending agent in the registrants most recent fiscal year. N/A ITEM 13. EXHIBITS. (a) File the exhibits listed below as part of this Form. Letter or number the exhibits in the sequence indicated. (1) Any code of ethics, or amendment thereto, that is the subject of the disclosure required by Item 2, to the extent that the registrant intends to satisfy the Item 2 requirements through filing of an exhibit. (2) A separate certification for each principal executive officer and principal financial officer of the registrant as required by Rule 30a-2(a) under the Act (17 CFR 270.30a-2(a)) , exactly as set forth below: Filed herewith. SIGNATURES [See General Instruction F] Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. (Registrant) Pioneer Series Trust III By (Signature and Title)* /s/ Lisa M. Jones Lisa M. Jones, President & Chief Executive Officer Date November 1, 2019 Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated. By (Signature and Title)* /s/ Lisa M. Jones Lisa M. Jones, President & Chief Executive Officer Date November 1, 2019 By (Signature and Title)* /s/ Mark E. Bradley Mark E. Bradley, Treasurer & Chief Accounting & Financial Officer Date November 1, 2019 * Print the name and title of each signing officer under his or her signature.