OMB APPROVAL OMB Number: 3235-0570 Expires: January 31, 2017 Estimated average burden hours per response.....20.6 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM N-CSR CERTIFIED SHAREHOLDER REPORT OF REGISTERED MANAGEMENT INVESTMENT COMPANIES 		Investment Company Act file number 811-01835 Pioneer Series Trust XI (Exact name of registrant as specified in charter) 60 State Street, Boston, MA 02109 (Address of principal executive offices) (ZIP code) Terrence J. Cullen, Pioneer Investment Management, Inc., 60 State Street, Boston, MA 02109 (Name and address of agent for service) Registrant's telephone number, including area code: (617) 742-7825 Date of fiscal year end: December 31 Date of reporting period: January 1, 2014 through December 31, 2014 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 Core Equity Fund -------------------------------------------------------------------------------- Annual Report | December 31, 2014 -------------------------------------------------------------------------------- Ticker Symbols: Class A PIOTX Class C PCOTX Class Y PVFYX [LOGO] PIONEER Investments(R) visit us: us.pioneerinvestments.com Table of Contents President's Letter 2 Portfolio Management Discussion 4 Portfolio Summary 9 Prices and Distributions 10 Performance Update 11 Comparing Ongoing Fund Expenses 14 Schedule of Investments 16 Financial Statements 22 Notes to Financial Statements 29 Report of Independent Registered Public Accounting Firm 39 Approval of Investment Advisory Agreement 40 Trustees, Officers and Service Providers 44 Pioneer Core Equity Fund | Annual Report | 12/31/14 1 President's Letter Dear Shareowner, Today's market environment presents numerous opportunities as well as challenges for investors. A disparate global economic landscape has formed, with the U.S. facing prospects for continued growth, while questions abound regarding the outlook for other regions. Employment, household income, and corporate profits have been rising in the U.S. and inflation pressures remain low. However, many countries across Europe as well as Japan face muted growth. In addition, a variety of factors have clouded the outlook for countries such as Russia and Brazil and China's investment-driven economy continues to slow. Monetary policies of major central banks are diverging, reflecting different economic conditions. With the U.S. economy no longer in need of extraordinary stimulus, the Federal Reserve Board may be closer to raising short-term interest rates. Conversely, the European Central Bank and the Bank of Japan are likely to be adding, not removing, stimulus. While we anticipate continued growth for the U.S., the outlook is far from certain, nor is the outlook for other regions necessarily dire. It remains to be seen how weakness outside the U.S. will affect global growth and whether easing monetary policies in other regions will spur an economic recovery. While these economic conditions may lead to increasing volatility in 2015, we believe the opportunity for investors to earn attractive returns will persist. However, in an environment where interest rates remain low and equity valuations have been buoyed by an extended bull market, we believe it is imperative investors adhere to a disciplined investment approach that is consistent with one's goals and objectives, being mindful of the tradeoff between risk and return. Since 1928 Pioneer's investment professionals have been focused on identifying and capitalizing on investment opportunities that present themselves in a variety of ever changing market conditions, including those we face today. We seek returns consistent with our strategies' stated style and 2 Pioneer Core Equity Fund | Annual Report | 12/31/14 objectives and consistent with our shareholders' expectations, regardless of market conditions. We believe our shareowners benefit from the experience and tenure of our investment teams, the insights generated from extensive research resources and a commitment to prudent risk management designed to mitigate downside and preserve returns over time. 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, as we do when deploying strategies on behalf of our shareowners. We greatly appreciate your trust in us in the past and look forward to continuing to serve you in the future. Sincerely, /s/ Lisa M. Jones Lisa M. Jones President and CEO Pioneer Investment Management USA, Inc. Any information in this shareowner report regarding market or economic trends or the factors influencing the Fund's historical or future performance are statements of opinion as of the date of this report. These statements should not be relied upon for any other purposes. Past performance is no guarantee of future results, and there is no guarantee that market forecasts discussed will be realized. Pioneer Core Equity Fund | Annual Report | 12/31/14 3 Portfolio Management Discussion | 12/31/14 The domestic equity market generated positive performance during 2014, helped by growing evidence that the U.S. economic recovery finally had started to generate consistent and impressive gains in employment, without adding to inflationary pressures. In the following interview, Paul Cloonan and John Peckham discuss the market environment and the factors that influenced the performance of Pioneer Core Equity Fund during 12-month period ended December 31, 2014. Mr. Cloonan, Senior Vice President, Co-Head of Equity Research, U.S., and a portfolio manager at Pioneer, and Mr. Peckham, CFA, Senior Vice President, Co-Head of Equity Research, U.S., and a portfolio manager at Pioneer, are responsible for the day-to-day management of the Fund, along with James Moynihan, a vice president and equity research analyst at Pioneer. Q How did the Fund perform during the 12-month period ended December 31, 2014? A Pioneer Core Equity Fund's Class A shares returned 10.44% at net asset value during the 12-month period ended December 31 2014, while the Fund's benchmark, the Standard & Poor's 500 Index (the S&P 500), returned 13.66%. During the same period, the average return of the 857 mutual funds in Lipper's Large-Cap Core Funds category was 11.32%, and the average return of the 1,568 mutual funds in Morningstar's Large Blend Fund category was 10.96%. Q How would you describe the investment environment for equities during the 12-month period ended December 31, 2014? A The domestic stock market registered healthy gains during the year based on growing confidence in the strength and durability of the U.S. economic recovery. While the year began with a decline in gross domestic product (GDP) in the first quarter, the economy then accelerated, with GDP growing at a 4.6% annual rate in the second calendar quarter and a 5.0% rate in the third quarter, with widespread evidence of a continuing - if slightly less robust - expansion in the fourth quarter. Importantly, the employment situation, which had appeared stagnant early in economic recovery, finally started to improve, with the economy producing an average of 250,000 new jobs each month by the end of the 2014. Meanwhile, the housing market, which had crashed as the economy fell into recession in 2008 and 2009, also showed steady improvement. While the equity market made gains throughout the 12-month period, volatility also increased beginning in September 2014. One factor contributing to the volatility was the end of the quantitative easing (QE) policies of the U.S. Federal Reserve System (the Fed), which had involved 4 Pioneer Core Equity Fund | Annual Report | 12/31/14 injecting liquidity into the capital markets through monthly purchases of Treasuries and government-backed mortgage securities in the open market. Late in the year, several factors also combined to drive market volatility, including: rising global geopolitical risks, particularly in the Middle East and Eastern Europe; disappointing economic growth trends in Europe, Japan and China; and collapsing prices of commodities, especially oil. In addition, the U.S. dollar strengthened against most foreign currencies during the period. For the full 12 months, stocks in the utilities sector produced the strongest average performance, followed by stocks in the health care sector. Energy stocks registered the poorest results by far, with stocks of oil-related companies falling hard as oil prices collapsed. Q What types of investments tended to have the greatest influence on the Fund's benchmark-relative performance during the 12-month period ended December 31, 2014? A The Fund's exposures to the energy and the financials sectors were the main reasons for its underperformance relative to the S&P 500 during the period, while investments in health care provided the greatest support to relative returns. In energy, the collapse in crude oil prices undercut the performance of several of the portfolio's holdings in the energy exploration-and- production (E&P) and oil services areas. We liquidated the Fund's investments in three E&P holdings that were among the most disappointing performers during the period: Whiting Petroleum; Southwestern Energy; and Kodiak Oil & Gas. Among holdings in the financials sector, diversified banking firms Bank of America and Citigroup underperformed and detracted from the Fund's benchmark-relative results. In addition, benchmark-relative performance was hurt by not owning certain positions that are part of the S&P 500. In particular, we largely avoided insurers, which performed well during the period, and did not hold any shares in the portfolio of either diversified financials company Berkshire Hathaway or banking corporation Wells Fargo; those decisions hurt benchmark-relative results as each company turned in very strong performance during the period. Another detractor from the Fund's benchmark-relative returns in financials was the portfolio's underweight in real estate investment trusts (REITs), which are interest- rate-sensitive organizations that showed strong improvement during 2014. With interest rates declining over the 12-month period, REITs were an increasingly attractive alternative to government or corporate bonds for investors seeking current income. Pioneer Core Equity Fund | Annual Report | 12/31/14 5 Other holdings that detracted from the Fund's performance during the period included Nu Skin Enterprises, a global marketer of skin-care products with heavy exposure to the Chinese market. Shares of Nu Skin fell precipitously during the period following a Chinese government investigation of the company's sales practices. While the investigation was resolved with a relatively small fine, the company was slow to regain its earlier, lost momentum. On the positive side, good stock selection and an overweight portfolio position in health care boosted the Fund's returns relative to the benchmark. During the period, the sector featured a broad array of stellar performers among pharmaceutical, health services, and health care equipment corporations. Within health care, the Fund's holdings of Covidien and Actavis produced particularly strong results. Covidien, a producer of medical equipment and other medical products, was the biggest contributor to benchmark-relative performance within the sector as the company's share price appreciated significantly after it received a takeover offer from medical device manufacturer Medtronic. Actavis is a specialty and generic pharmaceutical company that successfully grew its earnings during the period, partly as the result of several previous acquisitions. Within the consumer discretionary sector, two significant contributors to relative performance were the Fund's positions in hotel and resort operator Marriott International and retail hardware chain Lowe's. Marriott's high occupancy rates and strong pricing trends led to accelerating earnings growth during the period, while Lowe's benefited from the recovery in the housing industry. Q Were any notable changes made in the Fund's portfolio during the 12-month period ended December 31, 2014? A We continued to look for new investment opportunities for the Fund during the period, even as we sold positions in several companies that either had done well, had deteriorating prospects, or had produced disappointing results. We made significant changes among the portfolio's energy holdings, notably adding a position late in the period in ExxonMobil, which we thought had a more diversified asset base that was better able to withstand the effects of declining oil prices. As we did so, we eliminated positions in several oil services and energy E&P companies that were more directly hurt by collapsing commodity prices. The sales included shares of: Superior Energy, Kodiak Oil & Gas, Halliburton Company, Pioneer Natural Resources, and Whiting Petroleum. Earlier in the Fund's fiscal year, we also had sold positions in Occidental Petroleum and Marathon Oil. 6 Pioneer Core Equity Fund | Annual Report | 12/31/14 We made a number of changes among the Fund's holdings in financials as well. Early in the period, we sold investments in Keycorp, Goldman Sachs, ACE, Walter Investment Management, BB&T, and insurer Aflac. Financial companies that we added to the portfolio during the period included Voya Financial and Lazard. In health care, we sold the Fund's holdings of pharmaceutical company Pfizer and diversified corporation Johnson & Johnson late in the period, while adding positions in pharmaceutical companies Teva Pharmaceuticals and Mallinckrodt. Earlier, we had sold the Fund's investment in AstraZeneca and established a position in Merck. We also liquidated positions in Time Warner, Estee Lauder and Dick's Sporting Goods, while adding investments in -- among others -- Facebook and Host Hotels and Resorts. Q Did you make investments in any derivative securities during the 12-month period ended December 31, 2014? A No, we did not use any derivatives in the Fund's portfolio during the period. Q What is your investment outlook? A We believe economic growth in the U.S. should remain stable, which would be positive for equity values. As the employment market continues to improve, consumer spending also should stabilize. Meanwhile, we believe inflationary pressures are likely to remain muted, in part because of weak commodity prices and the strong U.S. dollar. The domestic economy also should be helped by improvements in the U.S. fiscal deficit. That, in turn, could lead to less pressure on lawmakers to either reduce government spending or to raise taxes. Although the end of the Fed's QE policy may lead to more volatility in equity prices, we anticipate that overall financial conditions will remain benign. The absence of any significant inflationary forces also may discourage the Fed from raising short-term interest rates substantially. While the outlook in the U.S. appears favorable, risks from overseas could affect the domestic economy. Growth in China is slowing as the government moves to cut back on the expansion of credit, while Russia's actions in the Ukraine and the resulting economic sanctions imposed by the West potentially could affect the stability and growth of the global economy. Pioneer Core Equity Fund | Annual Report | 12/31/14 7 Nevertheless, we assume that if the challenges in the emerging markets do not worsen, the outlook for U.S. equities will remain healthy. Valuations in most stock groups remain relatively reasonable, while corporate balance sheets and cash flows continue to be solid. Those factors could lead to actions that tend to support equity performance, including mergers and acquisitions, share repurchases, and increases in stock dividends*. Consistent with our long-term investment discipline for the Fund, we will continue to focus on stock picking, a process which emphasizes bottom-up, fundamental analysis. We believe this approach is durable and repeatable and can bring reasonable investment performance in a variety of market conditions and at various stages of the economic cycle. Please refer to the Schedule of Investments on pages 16-21 for a full listing of Fund securities. 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 Pioneer Investments for a prospectus or summary prospectus containing this information. Read it carefully. Any information in this shareholder report regarding market or economic trends or the factors influencing the Fund's historical or future performance are statements of opinion as of the date of this report. Past performance is no guarantee of future results. * Dividends are not guaranteed. 8 Pioneer Core Equity Fund | Annual Report | 12/31/14 Portfolio Summary | 12/31/14 Portfolio Diversification -------------------------------------------------------------------------------- (As a percentage of total investment portfolio) [THE FOLLOWING DATA WAS REPRESENTED AS A PIE CHART IN THE PRINTED MATERIAL] U.S. Common Stocks 94.2% International Common Stocks 5.2% Depository Receipts for International Stocks 0.6% Sector Distribution -------------------------------------------------------------------------------- (As a percentage of equity holdings) [THE FOLLOWING DATA WAS REPRESENTED AS A PIE CHART IN THE PRINTED MATERIAL] Information Technology 20.3% Financials 16.8% Health Care 15.4% Consumer Discretionary 11.9% Industrials 11.3% Consumer Staples 9.6% Energy 6.5% Utilities 3.1% Materials 2.7% Telecommunication Services 2.4% 10 Largest Holdings -------------------------------------------------------------------------------- (As a percentage of equity holdings)* 1. Apple, Inc. 4.48% -------------------------------------------------------------------------------- 2. Microsoft Corp. 3.27 -------------------------------------------------------------------------------- 3. Exxon Mobil Corp. 2.36 -------------------------------------------------------------------------------- 4. Bank of America Corp. 2.15 -------------------------------------------------------------------------------- 5. AbbVie, Inc. 2.12 -------------------------------------------------------------------------------- 6. Honeywell International, Inc. 2.07 -------------------------------------------------------------------------------- 7. Verizon Communications, Inc. 2.01 -------------------------------------------------------------------------------- 8. Citigroup, Inc. 2.01 -------------------------------------------------------------------------------- 9. Merck & Co., Inc. 1.98 -------------------------------------------------------------------------------- 10. Lowe's Companies, Inc. 1.95 -------------------------------------------------------------------------------- * This list excludes temporary cash investments and derivative instruments. The Fund is actively managed, and current holdings may be different. The holdings listed should not be considered recommendations to buy or sell any security listed. Pioneer Core Equity Fund | Annual Report | 12/31/14 9 Prices and Distributions | 12/31/14 Net Asset Value per Share -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- Class 12/31/14 12/31/13* -------------------------------------------------------------------------------- A $17.18 $15.70 -------------------------------------------------------------------------------- C $15.48 $14.19 -------------------------------------------------------------------------------- Y $17.34 $15.85 -------------------------------------------------------------------------------- Distributions per Share: 1/1/14 - 12/31/14 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- Net Investment Short-Term Long-Term Class Income Capital Gains Capital Gains -------------------------------------------------------------------------------- A $0.1619 $ -- $ -- -------------------------------------------------------------------------------- C $0.0620 $ -- $ -- -------------------------------------------------------------------------------- Y $0.2165 $ -- $ -- -------------------------------------------------------------------------------- * The Fund acquired the assets and liabilities of Pioneer Research Fund (the "predecessor fund") on June 7, 2013 (the "reorganization"). As a result of the reorganization, the predecessor fund's performance and financial history became the performance and financial history of the Fund. Historical per-share amounts prior to June 7, 2013 have been adjusted to reflect the conversion ratios used for the reorganization. Index Definition -------------------------------------------------------------------------------- The Standard & Poor's 500 Index is an unmanaged, commonly used measure of the broad U.S. stock market. Index returns are calculated monthly, assume reinvestment of dividends and, unlike Fund returns, do not reflect any fees, expenses or sales charges. It is not possible to invest directly in an index. The index defined here pertains to the "Value of $10,000 Investment" and "Value of $5 Million Investment" charts on pages 11-13. 10 Pioneer Core Equity Fund | Annual Report | 12/31/14 Performance Update | 12/31/14 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 Core Equity Fund at public offering price during the periods shown, compared to that of the Standard & Poor's 500 Index. Average Annual Total Returns (As of December 31, 2014) -------------------------------------------------------------------------------- Net Public Asset Offering S&P Value Price 500 Period (NAV) (POP) Index -------------------------------------------------------------------------------- 10 Years 7.88% 7.24% 7.67% 5 Years 14.10 12.76 15.44 1 Year 10.44 4.08 13.66 -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated May 1, 2014) -------------------------------------------------------------------------------- Gross -------------------------------------------------------------------------------- 0.99% -------------------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $10,000 Investment Pioneer Core Standard & Poor's Equity Fund 500 Index 12/31/2004 $ 9,425 $10,000 12/31/2005 $10,103 $10,491 12/31/2006 $11,629 $12,146 12/31/2007 $12,441 $12,813 12/31/2008 $ 8,059 $ 8,074 12/31/2009 $10,405 $10,211 12/31/2010 $12,026 $11,751 12/31/2011 $12,143 $11,996 12/31/2012 $13,905 $13,914 12/31/2013 $18,219 $18,418 12/31/2014 $20,121 $20,935 Call 1-800-225-6292 or visit us.pioneerinvestments.com for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. NAV results represent the percent change in net asset value per share. Returns would have been lower had sales charges been reflected. POP returns reflect deduction of maximum 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 Research 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. Pioneer Core Equity Fund | Annual Report | 12/31/14 11 Performance Update | 12/31/14 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 Core Equity Fund for the periods shown, compared to that of the Standard & Poor's 500 Index. Average Annual Total Returns (As of December 31, 2014) -------------------------------------------------------------------------------- S&P If If 500 Period Held Redeemed Index -------------------------------------------------------------------------------- 10 Years 6.93% 6.93% 7.67% 5 Years 13.07 13.07 15.44 1 Year 9.52 9.52 13.66 -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated May 1, 2014) -------------------------------------------------------------------------------- Gross -------------------------------------------------------------------------------- 1.92% -------------------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $10,000 Investment Pioneer Core Standard & Poor's Equity Fund 500 Index 12/31/2004 $10,000 $10,000 12/31/2005 $10,617 $10,491 12/31/2006 $12,108 $12,146 12/31/2007 $12,858 $12,813 12/31/2008 $ 8,265 $ 8,074 12/31/2009 $10,573 $10,211 12/31/2010 $12,109 $11,751 12/31/2011 $12,122 $11,996 12/31/2012 $13,742 $13,914 12/31/2013 $17,839 $18,418 12/31/2014 $19,537 $20,935 Call 1-800-225-6292 or visit us.pioneerinvestments.com for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. Class C shares held for less than one year are also subject to a 1% contingent deferred sales charge (CDSC). If you paid a 1% sales charge, your returns would be lower than those shown above. "If Held" results represent the percent change in net asset value per share. Returns would have been lower had sales charges been reflected. All results are historical and assume the reinvestment of dividends and capital gains. Other share classes are available for which performance and expenses will differ. Performance results reflect any applicable expense waivers in effect during the periods shown. Without such waivers Fund performance would be lower. Waivers may not be in effect for all funds. Certain fee waivers are contractual through a specified period. Otherwise, fee waivers can be rescinded at any time. See the prospectus and financial statements for more information. The 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 Research 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. 12 Pioneer Core Equity Fund | Annual Report | 12/31/14 Performance Update | 12/31/14 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 Core Equity Fund during the periods shown, compared to that of the Standard & Poor's 500 Index. Average Annual Total Returns (As of December 31, 2014) -------------------------------------------------------------------------------- S&P If If 500 Period Held Redeemed Index -------------------------------------------------------------------------------- 10 Years 8.19% 8.19% 7.67% 5 Years 14.42 14.42 15.44 1 Year 10.75 10.75 13.66 -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated May 1, 2014) -------------------------------------------------------------------------------- Gross -------------------------------------------------------------------------------- 0.75% -------------------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $5 Million Investment Pioneer Core Standard & Poor's Equity Fund 500 Index 12/31/2004 $ 5,000,000 $ 5,000,000 12/31/2005 $ 5,367,504 $ 5,245,391 12/31/2006 $ 6,188,222 $ 6,073,169 12/31/2007 $ 6,656,097 $ 6,406,558 12/31/2008 $ 4,329,301 $ 4,036,754 12/31/2009 $ 5,604,829 $ 5,105,337 12/31/2010 $ 6,495,576 $ 5,875,431 12/31/2011 $ 6,573,679 $ 5,998,091 12/31/2012 $ 7,547,359 $ 6,957,038 12/31/2013 $ 9,924,356 $ 9,209,149 12/31/2014 $10,990,865 $10,467,483 Call 1-800-225-6292 or visit us.pioneerinvestments.com for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. The Fund acquired the assets and liabilities of Pioneer Research 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. Performance shown for periods prior to the inception of Class Y shares of the predecessor fund on August 11, 2004, reflects the NAV performance of the predecessor fund's Class A shares. The performance does not reflect differences in expenses, including the Rule 12b-1 fees applicable to Class A shares. Since fees for Class A shares are generally higher than those of Class Y shares, the performance for Class Y shares of the predecessor fund prior to their inception on August 11, 2004, would have been higher than that shown. 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. Pioneer Core Equity Fund | Annual Report | 12/31/14 13 Comparing Ongoing Fund Expenses As a shareowner in the Fund, you incur two types of costs: (1) ongoing costs, including management fees, distribution and/or service (12b-1) fees, and other Fund expenses; and (2) transaction costs, including sales charges (loads) on purchase payments. This example is intended to help you understand your ongoing expenses (in dollars) of investing in the Fund and to compare these costs with the ongoing costs of investing in other mutual funds. The example is based on an investment of $1,000 at the beginning of the Fund's latest six-month period and held throughout the six months. Using the Tables -------------------------------------------------------------------------------- Actual Expenses The first table below provides information about actual account values and actual expenses. You may use the information in this table, together with the amount you invested, to estimate the expenses that you paid over the period as follows: (1) Divide your account value by $1,000 Example: an $8,600 account value (divided by) $1,000 = 8.6 (2) Multiply the result in (1) above by the corresponding share class's number in the third row under the heading entitled "Expenses Paid During Period" to estimate the expenses you paid on your account during this period. Expenses Paid on a $1,000 Investment in Pioneer Core Equity Fund Based on actual returns from July 1, 2014 through December 31, 2014. -------------------------------------------------------------------------------- Share Class A C Y -------------------------------------------------------------------------------- Beginning Account Value $1,000.00 $1,000.00 $1,000.00 on 7/1/14 -------------------------------------------------------------------------------- Ending Account Value $1,045.83 $1,041.66 $1,047.98 (after expenses) on 12/31/14 -------------------------------------------------------------------------------- Expenses Paid $ 4.85 $ 9.31 $ 3.25 During Period* -------------------------------------------------------------------------------- * Expenses are equal to the Fund's annualized expense ratio of 0.94%, 1.81%, and 0.63% for Class A, Class C, and Class Y, respectively, multiplied by the average account value over the period, multiplied by 184/365 (to reflect the one-half year period). 14 Pioneer Core Equity Fund | Annual Report | 12/31/14 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 Core Equity Fund Based on a hypothetical 5% per year return before expenses, reflecting the period from July 1, 2014 through December 31, 2014. -------------------------------------------------------------------------------- Share Class A C Y -------------------------------------------------------------------------------- Beginning Account Value $1,000.00 $1,000.00 $1,000.00 on 7/1/14 -------------------------------------------------------------------------------- Ending Account Value $1,020.47 $1,016.08 $1,022.03 (after expenses) on 12/31/14 -------------------------------------------------------------------------------- Expenses Paid $ 4.79 $ 9.20 $ 3.21 During Period* -------------------------------------------------------------------------------- * Expenses are equal to the Fund's annualized expense ratio of 0.94%, 1.81%, and 0.63% for Class A, Class C, and Class Y, respectively, multiplied by the average account value over the period, multiplied by 184/365 (to reflect the one-half year period). Pioneer Core Equity Fund | Annual Report | 12/31/14 15 Schedule of Investments | 12/31/14 ------------------------------------------------------------------------------------- Shares Value ------------------------------------------------------------------------------------- COMMON STOCKS -- 99.4% ENERGY -- 6.5% Integrated Oil & Gas -- 2.4% 427,814 Exxon Mobil Corp. $ 39,551,404 ------------------------------------------------------------------------------------- Oil & Gas Exploration & Production -- 3.4% 313,502 Cabot Oil & Gas Corp. $ 9,282,794 336,083 ConocoPhillips 23,209,892 268,067 EOG Resources, Inc. 24,680,929 -------------- $ 57,173,615 ------------------------------------------------------------------------------------- Oil & Gas Refining & Marketing -- 0.7% 137,216 Marathon Petroleum Corp.* $ 12,385,116 -------------- Total Energy $ 109,110,135 ------------------------------------------------------------------------------------- MATERIALS -- 2.7% Commodity Chemicals -- 0.7% 147,393 LyondellBasell Industries NV $ 11,701,530 ------------------------------------------------------------------------------------- Fertilizers & Agricultural Chemicals -- 1.4% 196,048 Monsanto Co. $ 23,421,855 ------------------------------------------------------------------------------------- Specialty Chemicals -- 0.6% 103,548 Ecolab, Inc. $ 10,822,837 -------------- Total Materials $ 45,946,222 ------------------------------------------------------------------------------------- CAPITAL GOODS -- 7.9% Aerospace & Defense -- 3.1% 347,456 Honeywell International, Inc. $ 34,717,804 151,373 United Technologies Corp. 17,407,895 -------------- $ 52,125,699 ------------------------------------------------------------------------------------- Electrical Components & Equipment -- 1.5% 374,253 Eaton Corp. Plc $ 25,434,234 ------------------------------------------------------------------------------------- Construction & Farm Machinery & Heavy Trucks -- 0.6% 71,537 Cummins, Inc. $ 10,313,489 ------------------------------------------------------------------------------------- Industrial Machinery -- 2.7% 399,668 Ingersoll-Rand Plc $ 25,334,955 148,759 Parker-Hannifin Corp. 19,182,473 -------------- $ 44,517,428 -------------- Total Capital Goods $ 132,390,850 ------------------------------------------------------------------------------------- TRANSPORTATION -- 3.4% Airlines -- 1.9% 588,183 American Airlines Group, Inc. $ 31,544,254 ------------------------------------------------------------------------------------- Railroads -- 1.5% 216,639 Union Pacific Corp. $ 25,808,204 -------------- Total Transportation $ 57,352,458 ------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 16 Pioneer Core Equity Fund | Annual Report | 12/31/14 ------------------------------------------------------------------------------------- Shares Value ------------------------------------------------------------------------------------- CONSUMER DURABLES & APPAREL -- 0.5% Apparel, Accessories & Luxury Goods -- 0.5% 70,845 PVH Corp. $ 9,080,204 -------------- Total Consumer Durables & Apparel $ 9,080,204 ------------------------------------------------------------------------------------- CONSUMER SERVICES -- 2.3% Hotels, Resorts & Cruise Lines -- 1.3% 271,172 Marriott International, Inc. $ 21,159,551 ------------------------------------------------------------------------------------- Restaurants -- 1.0% 208,062 Starbucks Corp. $ 17,071,487 -------------- Total Consumer Services $ 38,231,038 ------------------------------------------------------------------------------------- MEDIA -- 4.7% Broadcasting -- 0.7% 200,777 CBS Corp. (Class B) $ 11,110,999 ------------------------------------------------------------------------------------- Cable & Satellite -- 2.3% 534,175 Comcast Corp. $ 30,987,492 57,539 Time Warner Cable, Inc. 8,749,380 -------------- $ 39,736,872 ------------------------------------------------------------------------------------- Movies & Entertainment -- 1.7% 308,716 The Walt Disney Co. $ 29,077,960 -------------- Total Media $ 79,925,831 ------------------------------------------------------------------------------------- RETAILING -- 4.4% Department Stores -- 1.0% 250,160 Macy's, Inc. $ 16,448,020 ------------------------------------------------------------------------------------- Apparel Retail -- 1.5% 257,096 Ross Stores, Inc. $ 24,233,869 ------------------------------------------------------------------------------------- Home Improvement Retail -- 1.9% 473,975 Lowe's Companies, Inc. $ 32,609,480 -------------- Total Retailing $ 73,291,369 ------------------------------------------------------------------------------------- FOOD & STAPLES RETAILING -- 1.7% Drug Retail -- 1.7% 301,067 CVS Health Corp. $ 28,995,763 -------------- Total Food & Staples Retailing $ 28,995,763 ------------------------------------------------------------------------------------- FOOD, BEVERAGE & TOBACCO -- 7.3% Brewers -- 1.2% 265,172 Molson Coors Brewing Co. (Class B) $ 19,760,617 ------------------------------------------------------------------------------------- Soft Drinks -- 1.3% 232,357 PepsiCo., Inc. $ 21,971,678 ------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Core Equity Fund | Annual Report | 12/31/14 17 Schedule of Investments | 12/31/14 (continued) ------------------------------------------------------------------------------------- Shares Value ------------------------------------------------------------------------------------- Packaged Foods & Meats -- 3.3% 220,313 Campbell Soup Co. $ 9,693,772 98,606 Keurig Green Mountain, Inc. 13,054,941 521,007 Mondelez International, Inc. 18,925,579 143,965 The Hershey Co. 14,962,282 -------------- $ 56,636,574 ------------------------------------------------------------------------------------- Tobacco -- 1.5% 398,878 Lorillard, Inc. $ 25,105,381 -------------- Total Food, Beverage & Tobacco $ 123,474,250 ------------------------------------------------------------------------------------- HOUSEHOLD & PERSONAL PRODUCTS -- 0.6% Personal Products -- 0.6% 227,319 Nu Skin Enterprises, Inc. $ 9,933,840 -------------- Total Household & Personal Products $ 9,933,840 ------------------------------------------------------------------------------------- HEALTH CARE EQUIPMENT & SERVICES -- 6.0% Health Care Equipment -- 1.1% 189,104 Covidien Plc $ 19,341,557 ------------------------------------------------------------------------------------- Health Care Distributors -- 1.6% 329,209 Cardinal Health, Inc. $ 26,577,043 ------------------------------------------------------------------------------------- Health Care Services -- 1.7% 133,210 DaVita HealthCare Partners, Inc.* $ 10,089,325 210,529 Express Scripts Holding Co.* 17,825,490 -------------- $ 27,914,815 ------------------------------------------------------------------------------------- Managed Health Care -- 1.6% 150,227 Aetna, Inc. $ 13,344,664 91,719 Humana, Inc. 13,173,600 -------------- $ 26,518,264 -------------- Total Health Care Equipment & Services $ 100,351,679 ------------------------------------------------------------------------------------- PHARMACEUTICALS, BIOTECHNOLOGY & LIFE SCIENCES -- 9.4% Biotechnology -- 3.8% 201,648 Celgene Corp.* $ 22,556,345 308,376 Gilead Sciences, Inc.* 29,067,522 108,420 Vertex Pharmaceuticals, Inc.* 12,880,296 -------------- $ 64,504,163 ------------------------------------------------------------------------------------- Pharmaceuticals -- 5.6% 543,513 AbbVie, Inc. $ 35,567,491 164,533 Mallinckrodt Plc* 16,293,703 583,133 Merck & Co., Inc. 33,116,123 149,658 Teva Pharmaceutical Industries, Ltd. (A.D.R.) 8,606,832 -------------- $ 93,584,149 -------------- Total Pharmaceuticals, Biotechnology & Life Sciences $ 158,088,312 ------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 18 Pioneer Core Equity Fund | Annual Report | 12/31/14 ------------------------------------------------------------------------------------- Shares Value ------------------------------------------------------------------------------------- BANKS -- 6.4% Diversified Banks -- 4.1% 2,011,261 Bank of America Corp. $ 35,981,459 621,593 Citigroup, Inc. 33,634,397 -------------- $ 69,615,856 ------------------------------------------------------------------------------------- Regional Banks -- 2.3% 1,218,125 Regions Financial Corp. $ 12,863,400 276,614 The PNC Financial Services Group, Inc. 25,235,495 -------------- $ 38,098,895 -------------- Total Banks $ 107,714,751 ------------------------------------------------------------------------------------- DIVERSIFIED FINANCIALS -- 7.1% Other Diversified Financial Services -- 1.0% 403,235 Voya Financial, Inc. $ 17,089,099 ------------------------------------------------------------------------------------- Specialized Finance -- 1.6% 49,206 Intercontinental Exchange, Inc. $ 10,790,384 325,946 The NASDAQ OMX Group, Inc. 15,632,370 -------------- $ 26,422,754 ------------------------------------------------------------------------------------- Consumer Finance -- 1.0% 273,931 Discover Financial Services, Inc. $ 17,939,741 ------------------------------------------------------------------------------------- Asset Management & Custody Banks -- 1.4% 74,128 Affiliated Managers Group, Inc.* $ 15,732,927 291,236 The Carlyle Group LP 8,008,990 -------------- $ 23,741,917 ------------------------------------------------------------------------------------- Investment Banking & Brokerage -- 2.1% 307,093 Lazard, Ltd. $ 15,363,863 502,903 Morgan Stanley Co. 19,512,636 -------------- $ 34,876,499 -------------- Total Diversified Financials $ 120,070,010 ------------------------------------------------------------------------------------- INSURANCE -- 2.0% Multi-line Insurance -- 1.2% 475,433 The Hartford Financial Services Group, Inc. $ 19,820,802 ------------------------------------------------------------------------------------- Property & Casualty Insurance -- 0.8% 206,002 The Allstate Corp. $ 14,471,640 -------------- Total Insurance $ 34,292,442 ------------------------------------------------------------------------------------- REAL ESTATE -- 1.2% Hotel & Resort REIT -- 1.2% 825,507 Host Hotels & Resorts, Inc. $ 19,622,301 -------------- Total Real Estate $ 19,622,301 ------------------------------------------------------------------------------------- SOFTWARE & SERVICES -- 11.0% Internet Software & Services -- 6.2% 402,134 eBay, Inc.* $ 22,567,760 279,944 Facebook, Inc.* 21,841,231 The accompanying notes are an integral part of these financial statements. Pioneer Core Equity Fund | Annual Report | 12/31/14 19 Schedule of Investments | 12/31/14 (continued) ------------------------------------------------------------------------------------- Shares Value ------------------------------------------------------------------------------------- Internet Software & Services -- (continued) 44,657 Google, Inc. (Class A)* $ 23,697,684 24,130 Google, Inc. (Class C) 12,702,032 466,080 Yahoo!, Inc.* 23,541,701 -------------- $ 104,350,408 ------------------------------------------------------------------------------------- Data Processing & Outsourced Services -- 1.6% 103,313 Visa, Inc. $ 27,088,669 ------------------------------------------------------------------------------------- Systems Software -- 3.2% 1,177,422 Microsoft Corp. $ 54,691,252 -------------- Total Software & Services $ 186,130,329 ------------------------------------------------------------------------------------- TECHNOLOGY HARDWARE & EQUIPMENT -- 7.5% Communications Equipment -- 1.3% 166,428 F5 Networks, Inc.* $ 21,713,029 ------------------------------------------------------------------------------------- Computer Storage & Peripherals -- 6.2% 679,124 Apple, Inc. $ 74,961,710 997,080 EMC Corp. 29,653,159 -------------- $ 104,614,869 -------------- Total Technology Hardware & Equipment $ 126,327,898 ------------------------------------------------------------------------------------- SEMICONDUCTORS & SEMICONDUCTOR EQUIPMENT -- 1.7% Semiconductors -- 1.7% 174,968 Analog Devices, Inc. $ 9,714,223 416,528 Xilinx, Inc. 18,031,497 -------------- $ 27,745,720 -------------- Total Semiconductors & Semiconductor Equipment $ 27,745,720 ------------------------------------------------------------------------------------- TELECOMMUNICATION SERVICES -- 2.0% Integrated Telecommunication Services -- 2.0% 720,778 Verizon Communications, Inc. $ 33,717,995 -------------- Total Telecommunication Services $ 33,717,995 ------------------------------------------------------------------------------------- UTILITIES -- 3.1% Electric Utilities -- 3.1% 412,851 American Electric Power Co., Inc. $ 25,068,313 261,544 NextEra Energy, Inc.* 27,799,512 -------------- $ 52,867,825 -------------- Total Utilities $ 52,867,825 ------------------------------------------------------------------------------------- TOTAL COMMON STOCKS (Cost $1,338,713,485) $1,674,661,222 ------------------------------------------------------------------------------------- TOTAL INVESTMENT IN SECURITIES -- 99.4% (Cost $1,338,713,485) (a) $1,674,661,222 ------------------------------------------------------------------------------------- OTHER ASSETS & LIABILITIES -- 0.6% $ 10,911,684 ------------------------------------------------------------------------------------- TOTAL NET ASSETS -- 100.0% $1,685,572,906 ===================================================================================== The accompanying notes are an integral part of these financial statements. 20 Pioneer Core Equity Fund | Annual Report | 12/31/14 * Non-income producing security. (A.D.R.) American Depositary Receipts. REIT Real Estate Investment Trust. (a) At December 31, 2014, the net unrealized appreciation on investments based on cost for federal income tax purposes of $1,342,656,344 was as follows: Aggregate gross unrealized appreciation for all investments in which there is an excess of value over tax cost $342,970,662 Aggregate gross unrealized depreciation for all investments in which there is an excess of tax cost over value (10,965,784) ------------ Net unrealized appreciation $332,004,878 ============ Purchases and sales of securities (excluding temporary cash investments) for the year ended December 31, 2014 aggregated $935,234,019 and $1,061,245,415, respectively. Various inputs are used in determining the value of the Fund's investments. These inputs are summarized in the three broad levels listed below. Level 1 - quoted prices in active markets for identical securities. Level 2 - other significant observable inputs (including quoted prices for similar securities, interest rates, prepayment speeds, credit risk, etc.) See Notes to Financial Statements -- Note 1A. Level 3 - significant unobservable inputs (including the Fund's own assumptions in determining fair value of investments) See Notes to Financial Statements -- Note 1A. Generally, equity securities are categorized as Level 1, fixed income securities and senior loans as Level 2 and securities valued using fair value methods (other than prices supplied by independent pricing services or broker-dealers) as Level 3. The following is a summary of the inputs used as of December 31, 2014, in valuing the Fund's investments: -------------------------------------------------------------------------------- Level 1 Level 2 Level 3 Total -------------------------------------------------------------------------------- Common Stocks $1,674,661,222 $ -- $ -- $1,674,661,222 -------------------------------------------------------------------------------- Total $1,674,661,222 $ -- $ -- $1,674,661,222 ================================================================================ During the year ended December 31, 2014, there were no transfers between Levels 1, 2 and 3. The accompanying notes are an integral part of these financial statements. Pioneer Core Equity Fund | Annual Report | 12/31/14 21 Statement of Assets and Liabilities | 12/31/14 ASSETS: Investment in securities (cost $1,338,713,485) $1,674,661,222 Cash 10,754,844 Receivables -- Fund shares sold 123,281 Dividends 1,870,582 --------------------------------------------------------------------------------- Total assets $1,687,409,929 ================================================================================= LIABILITIES: Payables -- Fund shares repurchased $ 1,255,996 Dividends 67,845 Due to affiliates 319,054 Accrued expenses 194,128 --------------------------------------------------------------------------------- Total liabilities $ 1,837,023 ================================================================================= NET ASSETS: Paid-in capital $1,624,444,097 Undistributed net investment income 1,201,447 Accumulated net realized loss on investments (276,020,375) Net unrealized appreciation on investments 335,947,737 --------------------------------------------------------------------------------- Total net assets $1,685,572,906 ================================================================================= NET ASSET VALUE PER SHARE: (No par value, unlimited number of shares authorized) Class A (based on $1,605,301,457/93,413,351 shares) $ 17.18 Class C (based on $13,847,805/894,546 shares) $ 15.48 Class Y (based on $66,423,644/3,830,547 shares) $ 17.34 MAXIMUM OFFERING PRICE: Class A ($17.18/94.25%) $ 18.23 ================================================================================= The accompanying notes are an integral part of these financial statements. 22 Pioneer Core Equity Fund | Annual Report | 12/31/14 Statement of Operations For the Year Ended 12/31/14 INVESTMENT INCOME: Dividends $ 32,258,975 Interest 2,731 Miscellaneous 250,169 -------------------------------------------------------------------------------------------- Total investment income $ 32,511,875 -------------------------------------------------------------------------------------------- EXPENSES: Management fees $ 8,240,395 Transfer agent fees Class A 1,150,460 Class B* 17,098 Class C 16,517 Class Y 1,160 Distribution fees Class A 3,947,999 Class B* 21,921 Class C 117,175 Shareholder communications expense 1,053,913 Administrative reimbursements 493,727 Custodian fees 27,954 Registration fees 77,169 Professional fees 138,036 Printing expense 43,084 Fees and expenses of nonaffiliated Trustees 54,706 Miscellaneous 56,002 -------------------------------------------------------------------------------------------- Total operating expenses $ 15,457,316 Less fees waived and expenses reimbursed by Pioneer Investment Management, Inc. (11,597) -------------------------------------------------------------------------------------------- Net operating expenses $ 15,445,719 -------------------------------------------------------------------------------------------- Interest expense $ 2,285 -------------------------------------------------------------------------------------------- Total operating expenses and interest expense $ 15,448,004 -------------------------------------------------------------------------------------------- Net investment income $ 17,063,871 -------------------------------------------------------------------------------------------- REALIZED AND UNREALIZED GAIN (LOSS) ON INVESTMENTS AND FOREIGN CURRENCY TRANSACTIONS Net realized gain (loss) on: Investments $ 110,426,038 Other assets and liabilities denominated in foreign currencies (4) $110,426,034 -------------------------------------------------------------------------------------------- Change in net unrealized appreciation (depreciation) on: Investments $ 36,075,800 Other assets and liabilities denominated in foreign currencies (16) $ 36,075,784 -------------------------------------------------------------------------------------------- Net gain on investments and foreign currency transactions $146,501,818 -------------------------------------------------------------------------------------------- Net increase in net assets resulting from operations $163,565,689 ============================================================================================ * Class B shares converted to Class A shares on November 10, 2014. The accompanying notes are an integral part of these financial statements. Pioneer Core Equity Fund | Annual Report | 12/31/14 23 Statements of Changes in Net Assets -------------------------------------------------------------------------------------------- Year Ended Year Ended 12/31/14 12/31/13 -------------------------------------------------------------------------------------------- FROM OPERATIONS: Net investment income $ 17,063,871 $ 6,309,230 Net realized gain on investments and foreign currency transactions 110,426,034 251,084,688 Change in net unrealized appreciation (depreciation) on investments and foreign currency transactions 36,075,784 (42,801,664) -------------------------------------------------------------------------------------------- Net increase in net assets resulting from operations $ 163,565,689 $ 214,592,254 -------------------------------------------------------------------------------------------- DISTRIBUTIONS TO SHAREOWNERS: Net investment income: Class A ($0.16 and $0.09* per share, respectively) $ (15,012,625) $ (5,422,071) Class C ($0.06 and $0.00* per share, respectively) (55,064) -- Class Y ($0.22 and $0.14* per share, respectively) (824,165) (462,355) -------------------------------------------------------------------------------------------- Total distributions to shareowners $ (15,891,854) $ (5,884,426) -------------------------------------------------------------------------------------------- FROM FUND SHARE TRANSACTIONS: Net proceeds from sale or exchange of shares $ 53,337,764 $ 40,425,981 Shares issued in reorganization -- 1,456,910,518 Reinvestment of distributions 14,517,279 5,188,297 Cost of shares repurchased (189,173,394) (114,662,950) -------------------------------------------------------------------------------------------- Net increase (decrease) in net assets resulting from Fund share transactions $ (121,318,351) $1,387,861,846 -------------------------------------------------------------------------------------------- Net increase in net assets $ 26,355,484 $1,596,569,674 NET ASSETS: Beginning of year $1,659,217,422 $ 62,647,748 -------------------------------------------------------------------------------------------- End of year $1,685,572,906 $1,659,217,422 ============================================================================================ Undistributed net investment income $ 1,201,447 $ 232,572 ============================================================================================ * Historical per share amounts prior to June 7, 2013 have been adjusted to reflect the conversion ratios used for the reorganization of the fund with Pioneer Research Fund. The accompanying notes are an integral part of these financial statements. 24 Pioneer Core Equity Fund | Annual Report | 12/31/14 ------------------------------------------------------------------------------------------------ '14 Shares '14 Amount '13 Shares '13 Amount ------------------------------------------------------------------------------------------------ Class A* Shares sold 1,659,757 $ 27,166,910 1,531,805 $ 21,575,373 Shares issued in reorganization -- -- 104,128,727 1,440,920,816 Reinvestment of distributions 817,018 14,256,940 324,881 5,078,946 Less shares repurchased (10,011,567) (163,425,287) (7,019,110) (101,470,474) ------------------------------------------------------------------------------------------------ Net increase (decrease) (7,534,792) $ (122,001,437) 98,966,303 $1,366,104,661 ================================================================================================ Class B* (a) Shares sold or exchanged 5,021 $ 72,059 11,081 $ 136,434 Shares issued in reorganization -- -- 179,044 2,266,334 Reinvestment of distributions -- -- -- -- Less shares repurchased (214,474) (3,255,376) (86,727) (1,090,017) ------------------------------------------------------------------------------------------------ Net increase (decrease) (209,453) $ (3,183,317) 103,398 $ 1,312,751 ================================================================================================ Class C* Shares sold 300,009 $ 4,477,066 181,450 $ 2,280,382 Shares issued in reorganization -- -- 388,889 4,870,847 Reinvestment of distributions 3,064 48,167 -- 206 Less shares repurchased (191,359) (2,797,736) (125,491) (1,610,723) ------------------------------------------------------------------------------------------------ Net increase 111,714 $ 1,727,497 444,848 $ 5,540,712 ================================================================================================ Class Y* Shares sold 1,260,451 $ 21,621,729 1,095,403 $ 16,433,792 Shares issued in reorganization -- -- 634,124 8,852,521 Reinvestment of distributions 12,055 212,172 7,172 109,145 Less shares repurchased (1,216,700) (19,694,995) (745,827) (10,491,736) ------------------------------------------------------------------------------------------------ Net increase 55,806 $ 2,138,906 990,872 $ 14,903,722 ================================================================================================ * Historical per share amounts prior to June 7, 2013 have been adjusted to reflect the conversion ratios used for the reorganization of the fund with Pioneer Research Fund. (a) Class B shares converted to Class A shares on November 10, 2014. The accompanying notes are an integral part of these financial statements. Pioneer Core Equity Fund | Annual Report | 12/31/14 25 Financial Highlights --------------------------------------------------------------------------------------------------------------------------------- Year Year Year Year Year Ended Ended Ended Ended Ended 12/31/14 12/31/13(a) 12/31/12(a) 12/31/11(a) 12/31/10(a) --------------------------------------------------------------------------------------------------------------------------------- Class A Net asset value, beginning of period $ 15.70 $ 12.06 $ 10.61 $ 10.57 $ 9.19 --------------------------------------------------------------------------------------------------------------------------------- Increase (decrease) from investment operations: Net investment income (loss) $ 0.18 $ 0.10 $ 0.08 $ 0.06 $ 0.06 Net realized and unrealized gain (loss) on investments 1.46 3.63 1.45 0.05 1.38 --------------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) from investment operations $ 1.64 $ 3.73 $ 1.53 $ 0.11 $ 1.44 --------------------------------------------------------------------------------------------------------------------------------- Distribution to shareowners: Net investment income $ (0.16) $ (0.09) $ (0.08) $ (0.07) $ (0.06) --------------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) in net asset value $ 1.48 $ 3.64 $ 1.45 $ 0.04 $ 1.38 --------------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $ 17.18 $ 15.70 $ 12.06 $ 10.61 $ 10.57 ================================================================================================================================= Total return* 10.44% 31.02% 14.51% 0.97% 15.58% Ratio of total expenses plus interest expense to average net assets (b) 0.94% 0.99% 1.25% 1.25% 1.25% Ratio of net investment income (loss) to average net assets 1.03% 0.70% 0.76% 0.59% 0.56% Portfolio turnover rate 57% 67% 59% 57% 57% Net assets, end of period (in thousands) $1,605,301 $1,585,294 $23,907 $15,957 $13,890 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Total expenses plus interest expense (b) 0.94% 0.99% 1.59% 1.55% 1.53% Net investment income (loss) 1.03% 0.70% 0.42% 0.29% 0.28% ================================================================================================================================= * Assumes initial investment at net asset value at the beginning of each period, reinvestment of all distributions, the complete redemption of the investment at net asset value at the end of each period and no sales charges. Total return would be reduced if sales charges were taken into account. (a) The Fund acquired the assets and liabilities of Pioneer Research Fund (the "predecessor fund") on June 7, 2013 (the "reorganization"). As a result of the reorganization, the predecessor fund's performance and financial history became the performance and financial history of the Fund. Historical per-share amounts prior to June 7, 2013 have been adjusted to reflect the conversion ratio used to align the net asset values of the Predecessor Fund with those of the Fund. (b) Includes interest expense of 0.00%+, 0.00%, 0.00%, 0.00% and 0.00%, respectively. + Amount rounds to less than 0.01%. The accompanying notes are an integral part of these financial statements. 26 Pioneer Core Equity Fund | Annual Report | 12/31/14 --------------------------------------------------------------------------------------------------------------------------------- Year Year Year Year Year Ended Ended Ended Ended Ended 12/31/14 12/31/13(a) 12/31/12(a) 12/31/11(a) 12/31/10(a) --------------------------------------------------------------------------------------------------------------------------------- Class C Net asset value, beginning of period $ 14.19 $ 10.93 $ 9.65 $ 9.64 $ 8.42 --------------------------------------------------------------------------------------------------------------------------------- Increase (decrease) from investment operations: Net investment income (loss) $ 0.02 $ (0.02)(b) $ (0.01)(b) $ (0.03) $ (0.03) Net realized and unrealized gain (loss) on investments 1.33 3.28 1.30 0.04 1.25 --------------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) from investment operations $ 1.35 $ 3.26 $ 1.29 $ 0.01 $ 1.22 --------------------------------------------------------------------------------------------------------------------------------- Distribution to shareowners: Net investment income $ (0.06) $ -- $ (0.01) $ -- $ -- --------------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) in net asset value $ 1.29 $ 3.26 $ 1.28 $ 0.01 $ 1.22 --------------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $ 15.48 $ 14.19 $ 10.93 $ 9.65 $ 9.64 ================================================================================================================================= Total return* 9.52% 29.81% 13.37% 0.11% 14.52% Ratio of total expenses plus interest expense to average net assets (c) 1.81% 1.92% 2.15% 2.15% 2.15% Ratio of net investment income (loss) to average net assets 0.14% (0.17)% (0.14)% (0.32)% (0.33)% Portfolio turnover rate 57% 67% 59% 57% 57% Net assets, end of period (in thousands) $13,848 $ 11,112 $ 3,695 $ 1,829 $ 1,630 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Total expenses plus interest expense (c) 1.81% 1.92% 2.31% 2.35% 2.38% Net investment income (loss) 0.14% (0.17)% (0.30)% (0.52)% (0.56)% ================================================================================================================================= * Assumes initial investment at net asset value at the beginning of each period, reinvestment of all distributions, the complete redemption of the investment at net asset value at the end of each period and no sales charges. Total return would be reduced if sales charges were taken into account. (a) The Fund acquired the assets and liabilities of Pioneer Research Fund (the "predecessor fund") on June 7, 2013 (the "reorganization"). As a result of the reorganization, the predecessor fund's performance and financial history became the performance and financial history of the Fund. Historical per-share amounts prior to June 7, 2013 have been adjusted to reflect the conversion ratio used to align the net asset values of the Predecessor Fund with those of the Fund. (b) The amount shown for a share outstanding does not correspond with the net investment gain on the Statement of Operations for the period due to timing of the sales and repurchases of shares. (c) Includes interest expense of 0.00%+, 0.00%, 0.00%, 0.00% and 0.00%, respectively. + Amount rounds to less than 0.01%. The accompanying notes are an integral part of these financial statements. Pioneer Core Equity Fund | Annual Report | 12/31/14 27 Financial Highlights (continued) --------------------------------------------------------------------------------------------------------------------------------- Year Year Year Year Year Ended Ended Ended Ended Ended 12/31/14 12/31/13(a) 12/31/12(a) 12/31/11(a) 12/31/10(a) --------------------------------------------------------------------------------------------------------------------------------- Class Y Net asset value, beginning of period $ 15.85 $ 12.17 $ 10.69 $ 10.66 $ 9.27 --------------------------------------------------------------------------------------------------------------------------------- Increase (decrease) from investment operations: Net investment income (loss) $ 0.20 $ 0.14 $ 0.11 $ 0.10 $ 0.09 Net realized and unrealized gain (loss) on investments 1.51 3.68 1.47 0.03 1.39 --------------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) from investment operations $ 1.71 $ 3.82 $ 1.58 $ 0.13 $ 1.48 --------------------------------------------------------------------------------------------------------------------------------- Distribution to shareowners: Net investment income $ (0.22) $ (0.14) $ (0.10) $ (0.10) $ (0.09) --------------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) in net asset value $ 1.49 $ 3.68 $ 1.48 $ 0.03 $ 1.39 --------------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $ 17.34 $ 15.85 $ 12.17 $ 10.69 $ 10.66 ================================================================================================================================= Total return* 10.75% 31.49% 14.81% 1.20% 15.89% Ratio of total expenses plus interest expense to average net assets (b) 0.63% 0.75% 1.02% 0.97% 0.96% Ratio of net investment income (loss) to average net assets 1.37% 1.01% 0.97% 0.81% 0.86% Portfolio turnover rate 57% 67% 59% 57% 57% Net assets, end of period (in thousands) $66,424 $59,812 $33,875 $30,811 $47,810 ================================================================================================================================= * Assumes initial investment at net asset value at the beginning of each period, reinvestment of all distributions, the complete redemption of the investment at net asset value at the end of each period and no sales charges. Total return would be reduced if sales charges were taken into account. (a) The Fund acquired the assets and liabilities of Pioneer Research Fund (the "predecessor fund") on June 7, 2013 (the "reorganization"). As a result of the reorganization, the predecessor fund's performance and financial history became the performance and financial history of the Fund. Historical per-share amounts prior to June 7, 2013 have been adjusted to reflect the conversion ratio used to align the net asset values of the Predecessor Fund with those of the Fund. (b) Includes interest expense of 0.00%+, 0.00%, 0.00%, 0.00% and 0.00%, respectively. + Amount rounds to less than 0.01%. The accompanying notes are an integral part of these financial statements. 28 Pioneer Core Equity Fund | Annual Report | 12/31/14 Notes to Financial Statements | 12/31/14 1. Organization and Significant Accounting Policies Pioneer Core Equity Fund (the Fund) is a diversified series of Pioneer Series Trust XI, a Delaware statutory trust registered under the Investment Company Act of 1940 as an open-end management investment company. The Fund acquired the assets and liabilities of Pioneer Research Fund on June 7, 2013. Pioneer Research Fund was the accounting survivor of the reorganization. Accordingly, Pioneer Research Fund's performance and financial history became the performance and financial history of the Fund. The financial highlights and shareholder activity, as reflected in the statement of changes in net assets, have been adjusted to reflect the conversion ratios used for the reorganization of the Fund with Pioneer Research Fund. Prior to the reorganization, the Fund was named Pioneer Value Fund. The investment objective of the Fund is to seek long-term capital growth. The Fund offers three classes of shares designated as Class A, Class C and Class Y shares. The Fund ceased to offer Class B shares on November 10, 2014. Class B shares were converted to Class A shares as of the close of business on November 10, 2014. 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 the flexibility to specify either per-share voting or dollar-weighted voting when submitting matters for shareholder approval. Under per-share voting, each share of a class of the Fund is entitled to one vote. Under dollar-weighted voting, a shareholder's voting power is determined not by the number of shares owned, but by the dollar value of the shares on the record date. Each share class has exclusive voting rights with respect to matters affecting only that class, including with respect to the distribution plan for that class. There is no distribution plan for Class Y shares. The Fund's financial statements have been prepared in conformity with U.S. generally accepted accounting principles that require the management of the Fund to, among other things, make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of income, expenses and gain or loss on investments during the reporting period. Actual results could differ from those estimates. Pioneer Core Equity Fund | Annual Report | 12/31/14 29 The following is a summary of significant accounting policies followed by the Fund in the preparation of its financial statements, which are consistent with those policies generally accepted in the investment company industry: A. Security Valuation Security transactions are recorded as of trade date. 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. In computing the net asset value, securities that have traded on an exchange are valued at the last sale price on the principal exchange where they are traded. Securities that have not traded on the date of valuation, or securities for which sale prices are not available, generally are valued at the mean between the last bid and asked prices. Shares of money market mutual funds are valued at such funds' net asset value. Cash may include overnight time deposits at approved financial institutions. Trading in foreign securities is substantially completed each day at various times prior to the close of the NYSE. The values of such securities used in computing the net asset value of the Fund's shares are determined as of such times. Securities for which independent pricing services are unable to supply prices or for which market prices and/or quotations are not readily available or are considered to be unreliable are valued by a fair valuation team comprised of certain personnel of Pioneer Investment Management, Inc. (PIM), the Fund's investment adviser, pursuant to procedures adopted by the Fund's Board of Trustees. PIM's fair valuation team uses fair value methods approved by the Valuation Committee of the Board of Trustees. PIM's fair valuation team is responsible for monitoring developments that may impact fair valued securities and for discussing and assessing fair values on an ongoing basis, and at least quarterly, with the Valuation Committee of the Board of Trustees. Inputs used when applying fair value methods to value a security may include credit ratings, the financial condition of the company, current market conditions and comparable securities. The Fund may use fair value methods if it is determined that a significant event has occurred after the close of the exchange or market on which the security trades and prior to the determination of the Fund's net asset value. Examples of a significant event might include political or economic news, corporate restructurings, natural disasters, terrorist activity or trading halts. Thus, the valuation of the Fund's securities may differ significantly from exchange prices and such differences could be material. At December 31, 2014, there were no securities that were valued using fair value methods (other than securities that were valued using prices supplied by independent pricing services or broker-dealers). 30 Pioneer Core Equity Fund | Annual Report | 12/31/14 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. Gains and losses on sales of investments are calculated on the identified cost method for both financial reporting and federal income tax purposes. C. Foreign Currency Translation The books and records of the Fund are maintained in U.S. dollars. Amounts denominated in foreign currencies are translated into U.S. dollars using current exchange rates. Net realized gains and losses on foreign currency transactions, if any, represent, among other things, the net realized gains and losses on foreign currency contracts, disposition of foreign currencies and the difference between the amount of income accrued and the U.S. dollars actually received. Further, the effects of changes in foreign currency exchange rates on investments are not segregated in the statement of operations from the effects of changes in the market prices of those securities, but are included with the net realized and unrealized gain or loss on investments. D. Forward Foreign Currency Contracts The Fund may enter into forward foreign currency contracts (contracts) for the purchase or sale of a specific foreign currency at a fixed price on a future date. All contracts are marked to market daily at the applicable exchange rates, and any resulting unrealized appreciation or depreciation are recorded in the Fund's financial statements. The Fund records realized gains and losses at the time a contract is offset by entry into a closing transaction or extinguished by delivery of the currency. Risks may arise upon entering into these contracts from the potential inability of counterparties to meet the terms of the contract and from unanticipated movements in the value of foreign currencies relative to the U.S. dollar. The Fund had no outstanding forward foreign currency contracts as of December 31, 2014. E. Federal Income Taxes It is the Fund's policy to comply with the requirements of the Internal Revenue Code applicable to regulated investment companies and to distribute all of its taxable income and net realized capital gains, if any, to its shareowners. Therefore, no provision for federal income taxes is required. As Pioneer Core Equity Fund | Annual Report | 12/31/14 31 of December 31, 2014, the Fund did not accrue any interest or penalties with respect to uncertain tax positions, which, if applicable, would be recorded as an income tax expense in the Statement of Operations. Tax returns filed within the prior three years remain subject to examination by Federal and State tax authorities. The amount and character of income and capital gain distributions to shareowners are determined in accordance with federal income tax rules, which may differ from U.S. generally accepted accounting principles. Distributions in excess of net investment income or net realized gains are temporary overdistributions for financial statement purposes resulting from differences in the recognition or classification of income or distributions for financial statement and tax purposes. Capital accounts within the financial statements are adjusted for permanent book/tax differences to reflect tax character, but are not adjusted for temporary differences. At December 31, 2014, the Fund reclassified $221,544 to decrease paid in capital, $203,142 to decrease undistributed net investment income and $424,686 to decrease accumulated net realized loss on investments to reflect permanent book/tax differences. These adjustments have no impact on net assets or the results of operations. At December 31, 2014, the Fund had a net capital loss carryforward of $270,876,069, which will expire in 2017, if not utilized. During the year ended December 31, 2014, a capital loss carryforward of $112,048,086 was utilized to offset net realized gains by the Fund. The tax character of distributions paid during the years ended December 31, 2014 and December 31, 2013 were as follows: --------------------------------------------------------------------------- 2014 2013 --------------------------------------------------------------------------- Distributions paid from: Ordinary income $15,891,854 $5,884,426 --------------------------------------------------------------------------- Total $15,891,854 $5,884,426 =========================================================================== The following shows components of distributable earnings on a federal income tax basis at December 31, 2014: --------------------------------------------------------------------------- 2014 --------------------------------------------------------------------------- Distributable earnings: Capital loss carryforward $(270,876,069) Net unrealized appreciation 332,004,878 --------------------------------------------------------------------------- Total $ 61,128,809 =========================================================================== 32 Pioneer Core Equity Fund | Annual Report | 12/31/14 The difference between book-basis and tax-basis net unrealized appreciation is attributable to the tax deferral of losses on wash sales, tax basis adjustments on Real Estate Investment Trust (REIT) holdings, partnerships and other holdings. F. Fund Shares The Fund records sales and repurchases of its shares as of trade date. Pioneer Funds Distributor, Inc. (PFD), the principal underwriter for the Fund and a wholly owned indirect subsidiary of UniCredit S.p.A. (UniCredit), earned $59,124 in underwriting commissions on the sale of Class A shares during the year ended December 31, 2014. G. Class Allocations Income, common expenses and realized and unrealized gains and losses are calculated at the Fund level and allocated daily to each class of shares based on its respective percentage of adjusted net assets at the beginning of the day. Distribution fees are calculated based on the average daily net asset value attributable to Class A and Class C shares of the Fund, respectively (see Note 4). Class Y shares do not pay distribution fees. All expenses and fees paid to the transfer agent, Pioneer Investment Management Shareholder Services, Inc. (PIMSS), 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 and Class Y shares can reflect different transfer agent and distribution expense rates. H. Risks At times, the Fund's investments may represent industries or industry sectors that are interrelated or have common risks, making the Fund more susceptible to any economic, political, or regulatory developments or other risks affecting those industries and sectors. The Fund's prospectus contains unaudited information regarding the Fund's principal risks. Please refer to that document when considering the Fund's principal risks. I. Repurchase Agreements With respect to repurchase agreements entered into by the Fund, the value of the underlying securities (collateral), including accrued interest, is required to be equal to or in excess of the repurchase price. The collateral for all repurchase agreements is held in safekeeping in the customer-only account of Pioneer Core Equity Fund | Annual Report | 12/31/14 33 the Fund's custodian or a subcustodian of the Fund. PIM is responsible for determining that the value of the collateral remains at least equal to the repurchase price. At December 31, 2014, the Fund had no open repurchase agreements. 2. Management Agreement PIM, a wholly owned indirect subsidiary of UniCredit, manages the Fund's portfolio. Management fees are calculated daily at the annual rate of 0.50% of the Fund's average daily net assets. Prior to June 7, 2013, the Fund paid a basic management fee that was calculated at the annual rate of 0.60% of the Fund's average daily net assets up to $5 billion, 0.575% of the next $5 billion and 0.55% on the excess over $10 billion. The basic fee increased or decreased by a maximum of 0.10%, based on the investment performance of the Fund's Class A shares as compared to the Russell 1000 Value Index. The performance comparison was made for a rolling 36-month period. Prior to June 7, 2013, the Pioneer Research Fund (the accounting survivor of the reorganization) paid a management fee that was calculated daily at the annual rate of 0.65% of such fund's average daily net assets up to $1 billion, 0.60% of the next $4 billion and 0.55% on assets over $5 billion. For the year ended December 31, 2014, the net management fee (excluding waivers and/or assumption of expenses) was equivalent to 0.50% of the Fund's average daily net assets. PIM has contractually agreed to limit ordinary operating expenses of the Fund to the extent required to reduce Fund expenses to 1.25% and 2.15% of the average daily net assets attributable to Class A and Class C shares, respectively. Class Y shares do not have an expense limitation. Fees waived and expenses reimbursed during the year ended December 31, 2014 are reflected on the Statement of Operations. These expense limitations are in effect through May 1, 2015. There can be no assurance that PIM will extend the expense limitation agreement for a class of shares beyond the date referred to above. In addition, under the management and administration agreements, certain other services and costs, including accounting, regulatory reporting and insurance premiums, are paid by the Fund as administrative reimbursements. Included in "Due to affiliates" reflected on the Statement of Assets and Liabilities is $48,565 in management fees, administrative costs and certain other reimbursements payable to PIM at December 31, 2014. 3. Transfer Agent PIMSS, a wholly owned indirect subsidiary of UniCredit, provides substantially all transfer agent and shareowner services to the Fund at negotiated rates. In addition, the Fund reimburses PIMSS for out-of-pocket expenses incurred by PIMSS related to shareholder communications activities such as proxy and statement mailings, outgoing phone calls and omnibus relationship contracts. 34 Pioneer Core Equity Fund | Annual Report | 12/31/14 For the year ended December 31, 2014, such out-of-pocket expenses by class of shares were as follows: -------------------------------------------------------------------------------- Shareholder Communications: -------------------------------------------------------------------------------- Class A $ 991,768 Class B 7,640 Class C 13,439 Class Y 41,066 -------------------------------------------------------------------------------- Total $1,053,913 ================================================================================ Included in "Due to affiliates" reflected on the Statement of Assets and Liabilities is $247,530 in transfer agent fees and out-of-pocket reimbursements payable to PIMSS at December 31, 2014. 4. Distribution Plan The Fund has adopted a Distribution Plan pursuant to Rule 12b-1 of the Investment Company Act of 1940 with respect to its Class A and Class C shares. Pursuant to the Plan, the Fund pays PFD 0.25% of the average daily net assets attributable to Class A shares as compensation for personal services and/or account maintenance services or distribution services with regard to Class A shares. Pursuant to the Plan, the Fund also pays PFD 1.00% of the average daily net assets attributable to Class C shares. The fee for Class C shares consists of a 0.25% service fee and a 0.75% distribution fee paid as compensation for personal services and/or account maintenance services or distribution services with regard to Class C shares. Included in "Due to affiliates" reflected on the Statement of Assets and Liabilities is $22,959 in distribution fees payable to PFD at December 31, 2014. In addition, redemptions of each class of shares (except Class Y shares) may be subject to a contingent deferred sales charge (CDSC). A CDSC of 1.00% may be imposed on redemptions of certain net asset value purchases of Class A shares within 12 months of purchase. Redemptions of Class C shares within 12 months of purchase are subject to a CDSC of 1.00%, based on the lower of cost or market value of shares being redeemed. Shares purchased as part of an exchange remain subject to any CDSC that applied to the original purchase of those shares. There is no CDSC for Class Y shares. Proceeds from the CDSC are paid to PFD. For the year ended December 31, 2014, CDSC in the amount of $1,134 were paid to PFD. 5. Expense Offset Arrangements The Fund has entered into certain expense offset arrangements with PIMSS which may result in a reduction in the Fund's total expenses due to interest earned on cash held by PIMSS. For the year ended December 31, 2014, the Fund's expenses were not reduced under such arrangements. Pioneer Core Equity Fund | Annual Report | 12/31/14 35 6. Reorganization Information On June 7, 2013 ("Closing Date"), Pioneer Research Fund (the "predecessor fund") was reorganized with the Fund. The purpose of this transaction was to combine two funds (managed by PIM) with similar investment objectives and strategies. This tax-free reorganization was accomplished by exchanging the assets and liabilities of the predecessor fund for shares of the Fund. Shareowners holding Class A, Class B*, Class C and Class Y of the predecessor fund received Class A, Class B, Class C and Class Y shares of the Fund, respectively, in the reorganization. The investment portfolio of the predecessor fund, with an aggregate value of $69,338,811 and an identified cost of $51,739,180 at June 7, 2013, was the principal asset acquired by the Fund. For financial reporting purposes, assets received and shares issued by the Fund were recorded at net asset value, however, the cost basis of the investments received from the predecessor fund was carried forward to align ongoing reporting of the Fund's realized and unrealized gains and losses with amounts distributable to shareowners for tax reporting purposes. The Fund was the legal survivor of the reorganization. The predecessor fund was the accounting survivor of the reorganization. Accordingly, the predecessor fund's performance and financial history became the performance and financial history of the Fund. Prior to the reorganization, the Fund was named Pioneer Value Fund. The following charts shows the details of the reorganization as of the Closing Date: --------------------------------------------------------------------------------------------- Pioneer Pioneer Core Pioneer Value Fund Research Fund Equity Fund (Pre-Reorganization) (Pre-Reorganization) (Post-Reorganization) --------------------------------------------------------------------------------------------- Net Assets Class A $ 1,440,920,816 $ 28,058,361 $ 1,468,979,177 Class B 2,266,334 864,098 3,130,432 Class C 4,870,847 4,859,909 9,730,756 Class Y 8,852,521 35,435,343 44,287,864 --------------------------------------------------------------------------------------------- Total Net Assets $ 1,456,910,518 $ 69,217,711 $ 1,526,128,229 --------------------------------------------------------------------------------------------- Shares Outstanding Class A 104,128,727 2,027,338* 106,156,065 Class B 179,044 68,254* 247,298 Class C 388,889 387,861* 776,750 Class Y 634,124 2,538,345* 3,172,469 * Class B shares of the Fund converted to Class A shares on November 10. 2014. (See Note 9). 36 Pioneer Core Equity Fund | Annual Report | 12/31/14 --------------------------------------------------------------------------------------------- Pre-conversion Conversion Post-conversion shares Ratio* shares --------------------------------------------------------------------------------------------- Class A 2,270,553 0.8929 2,027,338 Class B 74,320 0.9184 68,254 Class C 415,977 0.9324 387,861 Class Y 2,841,872 0.8932 2,538,345 * Share amounts have been adjusted to reflect the conversion ratios utilized to align the net asset values of the Predecessor Fund with those of the Fund. --------------------------------------------------------------------------------------------- Shares issued Exchange Ratio in reorganization** --------------------------------------------------------------------------------------------- Class A 1.000 104,128,727 Class B 1.000 179,044 Class C 1.000 388,889 Class Y 1.000 634,124 ** Reflects shares issued by the predecessor fund, the accounting survivor, as shown on the Statement of Changes. Unrealized Accumulated --------------------------------------------------------------------------------------------- Unrealized Accumulated Appreciation Gain (Loss) on on Closing Date Closing Date --------------------------------------------------------------------------------------------- Fund $331,284,140 $(610,173,465) Predecessor Fund 17,599,630 (24,643,957) Assuming the Reorganization had been completed on January 1, 2013, the pro forma results of operations for the fiscal year ended December 31, 2013, were as follows: Net Investment income (loss) $ 21,022,659 Net realized and unrealized gains 397,205,093 --------------------------------------------------------------------------------------------- Change in net assets resulting from operations $418,227,752 --------------------------------------------------------------------------------------------- Because the combined investment portfolios have been managed as a single integrated portfolio since the reorganization was completed, it is not practical to separate the amounts of revenue and earnings of the Fund that have been included in the Statements of Operations since the Reorganization was consummated. 7. Line of Credit Facility The Fund, along with certain other funds in the Pioneer Family of Funds (the Funds), participates in a committed, unsecured revolving line of credit facility. Borrowings are used solely for temporary or emergency purposes. The Fund may borrow up to the lesser of the amount available under the facility or the limits set for borrowing by the Fund's prospectus and the 1940 Act. The credit facility in effect until February 12, 2014 was in the amount of $215 million. As of February 12, 2014, the facility is in the amount of $240 million. Under such facility, depending on the type of loan, interest on borrowings is payable at the Pioneer Core Equity Fund | Annual Report | 12/31/14 37 London Interbank Offered Rate (LIBOR) plus 0.90% (0.85% as of February 12, 2014) on an annualized basis, or the Alternate Base Rate, which is the greater of (a) the facility's administrative agent's daily announced prime rate on the borrowing date, (b) 2% plus the Federal Funds Rate on the borrowing date and (c) 2% plus the overnight Eurodollar rate on the borrowing date. The Funds pay an annual commitment fee to participate in a credit facility. The commitment fee is allocated among participating Funds based on an allocation schedule set forth in the credit agreement. For the year ended December 31, 2014, the Fund had no borrowings under a credit facility. 8. Change in Independent Registered Public Accounting Firm The Board of Trustees of the Fund, with the approval and recommendation of the Audit Committee, appointed Deloitte & Touche LLP to serve as the Fund's independent registered public accounting firm for the fiscal year ending December 31, 2014. Deloitte & Touche LLP replaces Ernst & Young LLP, which resigned as the Fund's independent registered public accounting firm, effective upon completion of the audit of the Fund's financial statements for the fiscal year ended December 31, 2013. During the periods that Ernst & Young LLP served as the Fund's independent registered public accounting firm, including the Fund's two most recent fiscal years ending December 31, 2013 and December 31, 2012, Ernst & Young LLP's reports on the financial statements of the Fund have not contained an adverse opinion or disclaimer of opinion and have not been qualified or modified as to uncertainty, audit scope or accounting principles. Further, there have been no disagreements with Ernst & Young LLP on any matter of accounting principles or practices, financial statement disclosure, or auditing scope or procedure, which, if not resolved to the satisfaction of Ernst & Young LLP would have caused Ernst & Young LLP to make reference to the subject matter of the disagreement in connection with its report on the financial statements. In addition, there have been no reportable events of the kind described in Item 304(a)(1)(v) of Regulation S-K under the Securities Exchange Act of 1934. 9. Conversion of Class B shares As of the close of business on November 10, 2014 (the "Conversion Date"), all outstanding Class B shares of the Fund were converted to Class A shares. 38 Pioneer Core Equity Fund | Annual Report | 12/31/14 Report of Independent Registered Public Accounting Firm To the Board of Trustees and Shareowners of Pioneer Core Equity Fund: -------------------------------------------------------------------------------- We have audited the accompanying statement of assets and liabilities, including the schedule of investments, of Pioneer Core Equity Fund (the "Fund"), as of December 31, 2014, and the related statements of operations and changes in net assets, and the financial highlights for the year then ended. These financial statements and financial highlights are the responsibility of the Fund's management. Our responsibility is to express an opinion on these financial statements and financial highlights based on our audit. The statement of changes in net assets of the Fund for the year ended December 31, 2013, and the financial highlights for the years ended December 31, 2013, 2012, 2011, and 2010 were audited by other auditors. Those auditors expressed an unqualified opinion on those financial statements and financial highlights in their report dated February 25, 2014. We conducted our audit in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements and financial highlights are free of material misstatement. The Fund is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. Our audit included consideration of internal control over financial reporting as a basis for designing audit procedures that are appropriate in the circumstances, but not for the purpose of expressing an opinion on the effectiveness of the Fund's internal control over financial reporting. Accordingly, we express no such opinion. An audit also includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements, assessing the accounting principles used and significant estimates made by management, as well as evaluating the overall financial statement presentation. Our procedures included confirmation of securities owned as of December 31, 2014 by correspondence with the custodian. We believe that our audit provides a reasonable basis for our opinion. In our opinion, the financial statements and financial highlights referred to above present fairly, in all material respects, the financial position of Pioneer Core Equity Fund as of December 31, 2014, and the results of its operations, the changes in its net assets, and the financial highlights for the year then ended, in conformity with accounting principles generally accepted in the United States of America. /s/ Deloitte & Touche LLP Boston, Massachusetts February 23, 2015 Pioneer Core Equity Fund | Annual Report | 12/31/14 39 Approval of Investment Advisory Agreement Pioneer Investment Management, Inc. (PIM) serves as the investment adviser to Pioneer Core Equity Fund (the Fund) pursuant to an investment advisory agreement between PIM and the Fund. In order for PIM to remain the investment adviser of the Fund, the Trustees of the Fund must determine annually whether to renew the investment advisory agreement for the Fund. The contract review process began in January 2014 as the Trustees of the Fund agreed on, among other things, an overall approach and timeline for the process. Contract review materials were provided to the Trustees in March 2014 and July 2014. Supplemental contract review materials were provided to the Trustees in September 2014. In addition, the Trustees reviewed and discussed the Fund's performance at regularly scheduled meetings throughout the year, and took into account other information related to the Fund provided to the Trustees at regularly scheduled meetings, in connection with the review of the Fund's investment advisory agreement. In March 2014, the Trustees, among other things, discussed the memorandum provided by Fund counsel that summarized the legal standards and other considerations that are relevant to the Trustees in their deliberations regarding the renewal of the investment advisory agreement, and reviewed and discussed the qualifications of the investment management teams, as well as the level of investment by the Fund's portfolio managers in the Fund. In July 2014, the Trustees, among other things, reviewed the Fund's management fee and total expense ratios, the financial statements of PIM and its parent companies, the profitability analyses provided by PIM, and possible economies of scale. The Trustees also reviewed the profitability of the institutional business of PIM and PIM's affiliate, Pioneer Institutional Asset Management, Inc. (together with PIM, "Pioneer"), as compared to that of PIM's fund management business, and considered the differences between the fees and expenses of the Fund and the fees and expenses of Pioneer's institutional accounts, as well as the different services provided by PIM to the Fund and by Pioneer to the institutional accounts. The Trustees further considered contract review materials in September 2014. At a meeting held on September 16, 2014, based on their evaluation of the information provided by PIM and third parties, the Trustees of the Fund, including the Independent Trustees voting separately, unanimously approved the renewal of the investment advisory agreement for another year. In considering the renewal of the investment advisory agreement, the Trustees considered various factors that they determined were relevant, including the factors described below. In all quintile rankings referred to throughout this disclosure, first quintile is most favorable to the Fund's shareowners. The Trustees did not identify any single factor as the controlling factor in determining to approve the renewal of the agreement. 40 Pioneer Core Equity Fund | Annual Report | 12/31/14 Nature, Extent and Quality of Services The Trustees considered the nature, extent and quality of the services that had been provided by PIM to the Fund, taking into account the investment objective and strategy of the Fund. The Trustees reviewed the terms of the investment advisory agreement. The Trustees also reviewed PIM's investment approach for the Fund and its research process. The Trustees considered the resources of PIM and the personnel of PIM who provide investment management services to the Fund. They also reviewed the amount of non-Fund assets managed by the portfolio managers of the Fund. The Trustees considered the non-investment resources and personnel of PIM involved in PIM's services to the Fund, including PIM's compliance and legal resources and personnel. The Trustees noted the substantial attention and high priority given by PIM's senior management to the Pioneer fund complex. The Trustees considered that PIM supervises and monitors the performance of the Fund's service providers and provides the Fund with personnel (including Fund officers) and other resources that are necessary for the Fund's business management and operations. The Trustees also considered that, as administrator, PIM is responsible for the administration of the Fund's business and other affairs. The Trustees considered the fees paid to PIM for the provision of administration services. Based on these considerations, the Trustees concluded that the nature, extent and quality of services that had been provided by PIM to the Fund were satisfactory and consistent with the terms of the investment advisory agreement. Performance of the Fund In considering the Fund's performance, the Trustees regularly review and discuss analysis and data prepared by PIM and information comparing the Fund's performance with the performance of its peer group of funds as classified by each of Morningstar, Inc. (Morningstar) and Lipper, and with the performance of the Fund's benchmark index. They also discuss the Fund's performance with PIM on a regular basis. The Trustees confirmed that these regular reviews and discussions were factored into the Trustees' deliberations concerning the renewal of the advisory agreement. For purposes of their contract renewal deliberations, the Trustees considered the discussions held throughout the year regarding the Fund's performance and the performance results of the Fund over various time periods, including the Fund's performance results for periods ended June 30, 2014. The Trustees indicated that they were satisfied with PIM's investment discipline and approach in the prevailing market conditions, notwithstanding relatively poor peer comparisons of total return over the 1-, 3- and 5-year periods. Management Fee and Expenses The Trustees considered information showing the fees and expenses of the Fund in comparison to the management fees and expense ratios of its peer group of funds as classified by Morningstar and also to the expense ratios of a Pioneer Core Equity Fund | Annual Report | 12/31/14 41 peer group of funds selected on the basis of criteria determined by the Independent Trustees for this purpose using data provided by Strategic Insight Mutual Fund Research and Consulting, LLC (Strategic Insight), an independent third party. The Trustees considered that the Fund's management fee for the twelve months ended June 30, 2014 was in the first quintile relative to the management fees paid by other funds in its Morningstar peer group for the comparable period. The Trustees considered that the expense ratio of the Fund's Class A shares for the twelve months ended June 30, 2014 was in the second quintile relative to its Morningstar peer group and in the first quintile relative its Strategic Insight peer group, in each case for the comparable period. The Trustees considered the impact of transfer agency, sub-transfer agency, and other non-management fee expenses on the expense ratios of the Fund. The Trustees noted that they separately review the Fund's transfer agency, sub-transfer agency and intermediary arrangements. The Trustees reviewed management fees charged by Pioneer to institutional and other clients, including publicly offered European funds sponsored by affiliates of Pioneer, unaffiliated U.S. registered investment companies (in a sub-advisory capacity), and unaffiliated foreign and domestic separate accounts. The Trustees also considered PIM's costs in providing services to the Fund and Pioneer's costs in providing services to the other clients and considered the differences in management fees and profit margins for Fund and non-Fund services. In evaluating the fees associated with Pioneer's client accounts, the Trustees took into account the respective demands, resources and complexity associated with the Fund and client accounts. The Trustees noted that, in some instances, the fee rates for those clients were lower than the management fee for the Fund and considered that, under the investment advisory agreement with the Fund, PIM performs additional services for the Fund that it does not provide to those other clients or services that are broader in scope, including oversight of the Fund's other service providers and activities related to compliance and the extensive regulatory and tax regimes to which the Fund is subject. The Trustees also considered the different entrepreneurial risks associated with PIM's management of the Fund and Pioneer's management of the other client accounts. The Trustees concluded that the management fee payable by the Fund to PIM was reasonable in relation to the nature and quality of the services provided by PIM to the Fund. Profitability The Trustees considered information provided by PIM regarding the profitability of PIM with respect to the advisory services provided by PIM to the Fund, including the methodology used by PIM in allocating certain of its costs to the management of the Fund. The Trustees also considered PIM's profit margin in connection with the overall operation of the Fund. They further reviewed the financial results realized by PIM and its affiliates from 42 Pioneer Core Equity Fund | Annual Report | 12/31/14 non-fund businesses. The Trustees considered PIM's profit margins with respect to the Fund in comparison to the limited industry data available and noted that the profitability of any adviser was affected by numerous factors, including its organizational structure and method for allocating expenses. The Trustees concluded that PIM's profitability with respect to the management of the Fund was not unreasonable. Economies of Scale The Trustees considered PIM's views relating to economies of scale in connection with the Pioneer Funds as fund assets grow and the extent to which any such economies of scale are shared with funds and fund shareholders. The Trustees recognize that economies of scale are difficult to identify and quantify, and that, among other factors that may be relevant, are the following: fee levels, expense subsidization, investment by PIM in research and analytical capabilities and PIM's commitment and resource allocation to the Fund. The Trustees noted that profitability also may be an indicator of the availability of any economies of scale, although profitability may vary for other reasons including reductions in expenses. The Trustees concluded that economies of scale, if any, were being appropriately shared with the Funds. Other Benefits The Trustees considered the other benefits to PIM from its relationship with the Fund. The Trustees considered the character and amount of fees paid by the Fund, other than under the investment advisory agreement, for services provided by PIM and its affiliates. The Trustees further considered the revenues and profitability of PIM's businesses other than the fund business. Pioneer is the principal U.S. asset management business of Pioneer Global Asset Management, the worldwide asset management business of UniCredit Group, which manages over $150 billion in assets (including the Funds). Pioneer and the Funds receive reciprocal intangible benefits from the relationship, including mutual brand recognition and, for the Funds, direct and indirect access to the resources of a large global asset manager. The Trustees concluded that any such benefits received by Pioneer as a result of its relationship with the Funds were reasonable and their consideration of the advisory agreement between the Fund and PIM and the fees thereunder were unaffected by Pioneer's possible receipt of any such intangible benefits. Conclusion After consideration of the factors described above as well as other factors, the Trustees, including all of the Independent Trustees, concluded that the investment advisory agreement between PIM and the Fund, including the fees payable thereunder, was fair and reasonable and voted to approve the proposed renewal of the investment advisory agreement for the Fund. Pioneer Core Equity Fund | Annual Report | 12/31/14 43 Trustees, Officers and Service Providers Investment Adviser Pioneer Investment Management, Inc. Custodian and Sub-Administrator Brown Brothers Harriman & Co. Independent Registered Public Accounting Firm Deloitte & Touche LLP Principal Underwriter Pioneer Funds Distributor, Inc. Legal Counsel Morgan, Lewis & Bockius LLP Shareowner Services and Transfer Agent Pioneer Investment Management Shareholder Services, Inc. Proxy Voting Policies and Procedures of the Fund are available without charge, upon request, by calling our toll free number (1-800-225-6292). Information regarding how the Fund voted proxies relating to portfolio securities during the most recent 12-month period ended June 30 is publicly available to shareowners at us.pioneerinvestments.com. This information is also available on the Securities and Exchange Commission's web site at www.sec.gov. Trustees and Officers The Fund's Trustees and officers are listed below, together with their principal occupations during at least the past five years. Trustees who are interested persons of the Fund within the meaning of the 1940 Act are referred to as Interested Trustees. Trustees who are not interested persons of the Fund are referred to as Independent Trustees. Each of the Trustees serves as a Trustee of each of the 52 U.S. registered investment portfolios for which Pioneer serves as investment adviser (the "Pioneer Funds"). The address for all Trustees and all officers of the Fund is 60 State Street, Boston, Massachusetts 02109. The Statement of Additional Information of the Fund includes additional information about the Trustees and is available, without charge, upon request, by calling 1-800-225-6292. 44 Pioneer Core Equity Fund | Annual Report | 12/31/14 Independent Trustees ----------------------------------------------------------------------------------------------------------------------------------- Name, Age and Term of Office and Other Directorships Position Held with the Fund Length of Service Principal Occupation Held by Trustee ----------------------------------------------------------------------------------------------------------------------------------- Thomas J. Perna (64) Trustee since 2006. Serves Private investor (2004 - 2008 and Director, Broadridge Financial Chairman of the Board until a successor trustee 2013 - present); Chairman (2008 - Solutions, Inc. (investor and Trustee is elected or earlier 2013) and Chief Executive Officer communications and securities retirement or removal. (2008 - 2012), Quadriserv, Inc. processing provider for financial (technology products for securities services industry) (2009 - lending industry); and Senior present); Director, Quadriserv, Executive Vice President, The Bank Inc. (2005 - 2013); and of New York (financial and Commissioner, New Jersey State securities services) (1986 - 2004) Civil Service Commission (2011 - present) ----------------------------------------------------------------------------------------------------------------------------------- David R. Bock (71) Trustee since 2005. Serves Managing Partner, Federal City Director of New York Mortgage Trustee until a successor trustee Capital Advisors (corporate advisory Trust (publicly-traded mortgage is elected or earlier services company) (1997 - 2004 and REIT) 2004 - 2009, 2012 - retirement or removal. 2008 - present); Interim Chief present); Director (of The Swiss Executive Officer, Oxford Analytica, Helvetia Fund, Inc. (closed-end Inc. (privately-held research and fund) (2010 - present); Director consulting company) (2010); of Oxford Analytica, Inc. (2008 - Executive Vice President and Chief present); and Director of Financial Officer, I-trax, Inc. Enterprise Community Investment, (publicly traded health care Inc. (privately-held affordable services company) (2004 - 2007); and housing finance company) (1985 - Executive Vice President and Chief 2010) Financial Officer, Pedestal Inc. (internet-based mortgage trading company) (2000 - 2002); Private consultant (1995-1997), Managing Director, Lehman Brothers (investment banking firm) (1992-1995); and Executive, The World Bank (1979-1992) ----------------------------------------------------------------------------------------------------------------------------------- Benjamin M. Friedman (70) Trustee since 2008. Serves William Joseph Maier Professor of Trustee, Mellon Institutional Trustee until a successor trustee Political Economy, Harvard Funds Investment Trust and Mellon is elected or earlier University (1972 - present) Institutional Funds Master retirement or removal. Portfolio (oversaw 17 portfolios in fund complex) (1989-2008) ----------------------------------------------------------------------------------------------------------------------------------- Pioneer Core Equity Fund | Annual Report | 12/31/14 45 Independent Trustees (continued) ----------------------------------------------------------------------------------------------------------------------------------- Name, Age and Term of Office and Other Directorships Position Held with the Fund Length of Service Principal Occupation Held by Trustee ----------------------------------------------------------------------------------------------------------------------------------- Margaret B.W. Graham (67) Trustee since 1990. Serves Founding Director, Vice President None Trustee until a successor trustee and Corporate Secretary, The is elected or earlier Winthrop Group, Inc. (consulting retirement or removal. firm) (1982 - present); Desautels Faculty of Management, McGill University (1999 - present); and Manager of Research Operations and Organizational Learning, Xerox PARC, Xerox's advance research center (1990-1994) ----------------------------------------------------------------------------------------------------------------------------------- Marguerite A. Piret (66) Trustee since 1982. Serves President and Chief Executive Director of New America High Trustee until a successor trustee Officer, Newbury, Piret & Company, Income Fund, Inc. (closed-end is elected or earlier Inc. (investment banking firm) investment company) (2004 - retirement or removal. (1981 - present) present); and Member, Board of Governors, Investment Company Institute (2000 - 2006) ----------------------------------------------------------------------------------------------------------------------------------- Fred J. Ricciardi (67) Trustee since 2014. Serves Consultant (investment company None Trustee until a successor trustee services) (2012 - present); is elected or earlier Executive Vice President, BNY retirement or removal. Mellon (financial and investment company services) (1969 - 2012); Director, BNY International Financing Corp. (financial services) (2002 - 2012); and Director, Mellon Overseas Investment Corp. (financial services) (2009 - 2012) ----------------------------------------------------------------------------------------------------------------------------------- 46 Pioneer Core Equity Fund | Annual Report | 12/31/14 Interested Trustee ----------------------------------------------------------------------------------------------------------------------------------- Name, Age and Term of Office and Other Directorships Position Held with the Fund Length of Service Principal Occupation Held by Trustee ----------------------------------------------------------------------------------------------------------------------------------- Kenneth J. Taubes (56)* Trustee since 2014. Serves Director and Executive Vice President (since None Trustee until a successor trustee 2008) and Chief Investment Officer, U.S. is elected or earlier (since 2010) of PIM-USA; Executive Vice retirement or removal. President of Pioneer (since 2008); Executive Vice President of Pioneer Institutional Asset Management, Inc. (since 2009); and Portfolio Manager of Pioneer (since 1999) ----------------------------------------------------------------------------------------------------------------------------------- * Mr. Taubes is an Interested Trustee because he is an officer of the Fund's investment adviser and certain of its affiliates. Pioneer Core Equity Fund | Annual Report | 12/31/14 47 Advisory Trustee ----------------------------------------------------------------------------------------------------------------------------------- Name, Age and Term of Office and Other Directorships Position Held with the Fund Length of Service Principal Occupation Held by Trustee ----------------------------------------------------------------------------------------------------------------------------------- Lorraine Monchak (58)** Advisory Trustee since Chief Investment Officer, 1199 SEIU Funds None Advisory Trustee 2014. (healthcare workers union pension funds) (2001 - present); Vice President - International Investments Group, American International Group, Inc. (insurance company) (1993 - 2001); Vice President Corporate Finance and Treasury Group, Citibank, N.A.(1980 - 1986 and 1990 - 1993); Vice President - Asset/Liability Management Group, Federal Farm Funding Corporation (government-sponsored issuer of debt securities) (1988 - 1990); Mortgage Strategies Group, Shearson Lehman Hutton, Inc. (investment bank) (1987 - 1988); and Mortgage Strategies Group, Drexel Burnham Lambert, Ltd. (investment bank) (1986 - 1987) ----------------------------------------------------------------------------------------------------------------------------------- ** Ms. Monchak is a non-voting advisory trustee. 48 Pioneer Core Equity Fund | Annual Report | 12/31/14 Fund Officers ----------------------------------------------------------------------------------------------------------------------------------- Name, Age and Term of Office and Other Directorships Position Held with the Fund Length of Service Principal Occupation Held by Officer ----------------------------------------------------------------------------------------------------------------------------------- Lisa M. Jones (52) Since 2014. Serves at the Chair, Director, CEO and President of Pioneer None President and Chief discretion of the Board Investment Management-USA (since September Executive Officer 2014); Chair, Director, CEO and President of Pioneer Investment Management, Inc. (since September 2014); Chair, Director, CEO and President of Pioneer Funds Distributor, Inc. (since September 2014); Chair, Director, CEO and President of Pioneer Institutional Asset Management, Inc. (since September 2014); and Chair, Director, and CEO of Pioneer Investment Management Shareholder Services, Inc. (since September 2014); Managing Director, Morgan Stanley Investment Management (2010 - 2013); and Director of Institutional Business, CEO of International, Eaton Vance Management (2005 - 2010) ----------------------------------------------------------------------------------------------------------------------------------- Christopher J. Kelley (50) Since 2003. Serves at the Vice President and Associate General Counsel None Secretary and Chief discretion of the Board. of Pioneer since January 2008; Secretary and Legal Officer Chief Legal Officer of all of the Pioneer Funds since June 2010; Assistant Secretary of all of the Pioneer Funds from September 2003 to May 2010; and Vice President and Senior Counsel of Pioneer from July 2002 to December 2007 ----------------------------------------------------------------------------------------------------------------------------------- Carol B. Hannigan (53) Since 2010. Serves at the Fund Governance Director of Pioneer since None Assistant Secretary discretion of the Board. December 2006 and Assistant Secretary of all the Pioneer Funds since June 2010; Manager - Fund Governance of Pioneer from December 2003 to November 2006; and Senior Paralegal of Pioneer from January 2000 to November 2003 ----------------------------------------------------------------------------------------------------------------------------------- Thomas Reyes (52) Since 2010. Serves at the Senior Counsel of Pioneer since May 2013 and None Assistant Secretary discretion of the Board. Assistant Secretary of all the Pioneer Funds since June 2010; and Counsel of Pioneer from June 2007 to May 2013 ----------------------------------------------------------------------------------------------------------------------------------- Mark E. Bradley (55) Since 2008. Serves at the Vice President - Fund Treasury of Pioneer; None Treasurer and Chief discretion of the Board. Treasurer of all of the Pioneer Funds since Financial and March 2008; Deputy Treasurer of Pioneer from Accounting Officer March 2004 to February 2008; and Assistant Treasurer of all of the Pioneer Funds from March 2004 to February 2008 ----------------------------------------------------------------------------------------------------------------------------------- Pioneer Core Equity Fund | Annual Report | 12/31/14 49 Fund Officers (continued) ----------------------------------------------------------------------------------------------------------------------------------- Name, Age and Term of Office and Other Directorships Position Held with the Fund Length of Service Principal Occupation Held by Officer ----------------------------------------------------------------------------------------------------------------------------------- Luis I. Presutti (49) Since 2000. Serves at the Director - Fund Treasury of Pioneer; and None Assistant Treasurer discretion of the Board. Assistant Treasurer of all of the Pioneer Funds ----------------------------------------------------------------------------------------------------------------------------------- Gary Sullivan (56) Since 2002. Serves at the Fund Accounting Manager - Fund Treasury of None Assistant Treasurer discretion of the Board. Pioneer; and Assistant Treasurer of all of the Pioneer Funds ----------------------------------------------------------------------------------------------------------------------------------- David F. Johnson (35) Since 2009. Serves at the Fund Administration Manager - Fund Treasury of 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 ----------------------------------------------------------------------------------------------------------------------------------- Jean M. Bradley (62) Since 2010. Serves at the Chief Compliance Officer of Pioneer and of all None Chief Compliance Officer discretion of the Board. the Pioneer Funds since March 2010; Chief Compliance Officer of Pioneer Institutional Asset Management, Inc. since January 2012; Chief Compliance Officer of Vanderbilt Capital Advisors, LLC since July 2012: Director of Adviser and Portfolio Compliance at Pioneer since October 2005; and Senior Compliance Officer for Columbia Management Advisers, Inc. from October 2003 to October 2005 ----------------------------------------------------------------------------------------------------------------------------------- Kelly O'Donnell (43) Since 2006. Serves at the Director - Transfer Agency Compliance of None Anti-Money Laundering Officer discretion of the Board. Pioneer and Anti-Money Laundering Officer of all the Pioneer Funds since 2006 ----------------------------------------------------------------------------------------------------------------------------------- 50 Pioneer Core Equity Fund | Annual Report | 12/31/14 This page for your notes. Pioneer Core Equity Fund | Annual Report | 12/31/14 51 This page for your notes. 52 Pioneer Core Equity Fund | Annual Report | 12/31/14 How to Contact Pioneer We are pleased to offer a variety of convenient ways for you to contact us for assistance or information. Call us for: -------------------------------------------------------------------------------- Account Information, including existing accounts, new accounts, prospectuses, applications and service forms 1-800-225-6292 FactFone(SM) for automated fund yields, prices, account information and transactions 1-800-225-4321 Retirement plans information 1-800-622-0176 Write to us: -------------------------------------------------------------------------------- PIMSS, Inc. P.O. Box 55014 Boston, Massachusetts 02205-5014 Our toll-free fax 1-800-225-4240 Our internet e-mail address ask.pioneer@pioneerinvestments.com (for general questions about Pioneer only) Visit our web site: us.pioneerinvestments.com This report must be preceded or accompanied by a prospectus. The Fund files a complete schedule of investments with the Securities and Exchange Commission for the first and third quarters for each fiscal year on Form N-Q. Shareholders may view the filed Form N-Q by visiting the Commission's web site at http://www.sec.gov. The filed form may also be viewed and copied at the Commission's Public Reference Room in Washington, DC. Information regarding the operations of the Public Reference Room may be obtained by calling 1-800-SEC-0330. [LOGO] PIONEER Investments(R) Pioneer Investment Management, Inc. 60 State Street Boston, MA 02109 us.pioneerinvestments.com Securities offered through Pioneer Funds Distributor, Inc. 60 State Street, Boston, MA 02109 Underwriter of Pioneer Mutual Funds, Member SIPC (C) 2015 Pioneer Investments 18630-09-0215 ITEM 2. CODE OF ETHICS. (a) Disclose whether, as of the end of the period covered by the report, the registrant has adopted a code of ethics that applies to the registrant's principal executive officer, principal financial officer, principal accounting officer or controller, or persons performing similar functions, regardless of whether these individuals are employed by the registrant or a third party. If the registrant has not adopted such a code of ethics, explain why it has not done so. The registrant has adopted, as of the end of the period covered by this report, a code of ethics that applies to the registrant's principal executive officer, principal financial officer, principal accounting officer and controller. (b) For purposes of this Item, the term "code of ethics" means written standards that are reasonably designed to deter wrongdoing and to promote: (1) Honest and ethical conduct, including the ethical handling of actual or apparent conflicts of interest between personal and professional relationships; (2) Full, fair, accurate, timely, and understandable disclosure in reports and documents that a registrant files with, or submits to, the Commission and in other public communications made by the registrant; (3) Compliance with applicable governmental laws, rules, and regulations; (4) The prompt internal reporting of violations of the code to an appropriate person or persons identified in the code; and (5) Accountability for adherence to the code. (c) The registrant must briefly describe the nature of any amendment, during the period covered by the report, to a provision of its code of ethics that applies to the registrant's principal executive officer, principal financial officer, principal accounting officer or controller, or persons performing similar functions, regardless of whether these individuals are employed by the registrant or a third party, and that relates to any element of the code of ethics definition enumerated in paragraph (b) of this Item. The registrant must file a copy of any such amendment as an exhibit pursuant to Item 10(a), unless the registrant has elected to satisfy paragraph (f) of this Item by posting its code of ethics on its website pursuant to paragraph (f)(2) of this Item, or by undertaking to provide its code of ethics to any person without charge, upon request, pursuant to paragraph (f)(3) of this Item. The registrant has made no amendments to the code of ethics during the period covered by this report. (d) If the registrant has, during the period covered by the report, granted a waiver, including an implicit waiver, from a provision of the code of ethics to the registrant's principal executive officer, principal financial officer, principal accounting officer or controller, or persons performing similar functions, regardless of whether these individuals are employed by the registrant or a third party, that relates to one or more of the items set forth in paragraph (b) of this Item, the registrant must briefly describe the nature of the waiver, the name of the person to whom the waiver was granted, and the date of the waiver. Not applicable. (e) If the registrant intends to satisfy the disclosure requirement under paragraph (c) or (d) of this Item regarding an amendment to, or a waiver from, a provision of its code of ethics that applies to the registrant's principal executive officer, principal financial officer, principal accounting officer or controller, or persons performing similar functions and that relates to any element of the code of ethics definition enumerated in paragraph (b) of this Item by posting such information on its Internet website, disclose the registrant's Internet address and such intention. Not applicable. (f) The registrant must: (1) File with the Commission, pursuant to Item 12(a)(1), a copy of its code of ethics that applies to the registrant's principal executive officer,principal financial officer, principal accounting officer or controller, or persons performing similar functions, as an exhibit to its annual report on this Form N-CSR (see attachment); (2) Post the text of such code of ethics on its Internet website and disclose, in its most recent report on this Form N-CSR, its Internet address and the fact that it has posted such code of ethics on its Internet website; or (3) Undertake in its most recent report on this Form N-CSR to provide to any person without charge, upon request, a copy of such code of ethics and explain the manner in which such request may be made. 	See Item 10(2) ITEM 3. AUDIT COMMITTEE FINANCIAL EXPERT. (a) (1) Disclose that the registrant's board of trustees has determined that the registrant either: (i) Has at least one audit committee financial expert serving on its audit committee; or (ii) Does not have an audit committee financial expert serving on its audit committee. The registrant's Board of Trustees has determined that the registrant has at least one audit committee financial expert. (2) If the registrant provides the disclosure required by paragraph (a)(1)(i) of this Item, it must disclose the name of the audit committee financial expert and whether that person is "independent." In order to be considered "independent" for purposes of this Item, a member of an audit committee may not, other than in his or her capacity as a member of the audit committee, the board of trustees, or any other board committee: (i) Accept directly or indirectly any consulting, advisory, or other compensatory fee from the issuer; or (ii) Be an "interested person" of the investment company as defined in Section 2(a)(19) of the Act (15 U.S.C. 80a-2(a)(19)). Ms. Marguerite A. Piret, an independent trustee, is such an audit committee financial expert. (3) If the registrant provides the disclosure required by paragraph (a)(1) (ii) of this Item, it must explain why it does not have an audit committee financial expert. Not applicable. ITEM 4. PRINCIPAL ACCOUNTANT FEES AND SERVICES. (a) Disclose, under the caption AUDIT FEES, the aggregate fees billed for each of the last two fiscal years for professional services rendered by the principal accountant for the audit of the registrant's annual financial statements or services that are normally provided by the accountant in connection with statutory and regulatory filings or engagements for those fiscal years. Audit Fees The audit services provided to the Fund were totaled approximately $22,869 payable to Deloitte & Touche LLP for the year ended December 31, 2014 and $30,187 were paid to the former auditor, Ernst & Young LLP for the year ended December 31, 2013. (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 and Other Fees There were no audit related fees and other fees for the Trust payable to Deloitte & Touche LLP for the year ended December 31, 2014 and no audit related fees and other fees were paid to the former auditor, Ernst & Young LLP for the year ended December 31, 2013. (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. Tax Fees Fees for tax compliance services, primarily for tax returns, totaled approximately $5,600 payable to Deloitte & Touche LLP for the year ended December 31, 2014 and $8,131 were paid to the former auditor, Ernst & Young LLP for the year ended December 31, 2013. (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. Audit-Related Fees and Other Fees There were no audit related fees and other fees for the Trust payable to Deloitte & Touche LLP for the year ended December 31, 2014 and no audit related fees and other fees were paid to the former auditor, Ernst & Young LLP for the year ended December 31, 2013. (e) (1) Disclose the audit committee's pre-approval policies and procedures described in paragraph (c)(7) of Rule 2-01 of Regulation S-X. PIONEER FUNDS APPROVAL OF AUDIT, AUDIT-RELATED, TAX AND OTHER SERVICES PROVIDED BY THE INDEPENDENT AUDITOR SECTION I - POLICY PURPOSE AND APPLICABILITY The Pioneer Funds recognize the importance of maintaining the independence of their outside auditors. Maintaining independence is a shared responsibility involving Pioneer Investment Management, Inc ("PIM"), the audit committee and the independent auditors. The Funds recognize that a Fund's independent auditors: 1) possess knowledge of the Funds, 2) are able to incorporate certain services into the scope of the audit, thereby avoiding redundant work, cost and disruption of Fund personnel and processes, and 3) have expertise that has value to the Funds. As a result, there are situations where it is desirable to use the Fund's independent auditors for services in addition to the annual audit and where the potential for conflicts of interests are minimal. Consequently, this policy, which is intended to comply with Rule 210.2-01(C)(7), sets forth guidelines and procedures to be followed by the Funds when retaining the independent audit firm to perform audit, audit-related tax and other services under those circumstances, while also maintaining independence. Approval of a service in accordance with this policy for a Fund shall also constitute approval for any other Fund whose pre-approval is required pursuant to Rule 210.2-01(c)(7)(ii). In addition to the procedures set forth in this policy, any non-audit services that may be provided consistently with Rule 210.2-01 may be approved by the Audit Committee itself and any pre-approval that may be waived in accordance with Rule 210.2-01(c)(7)(i)(C) is hereby waived. Selection of a Fund's independent auditors and their compensation shall be determined by the Audit Committee and shall not be subject to this policy. SECTION II - POLICY ---------------- -------------------------------- ------------------------------------------------- SERVICE SERVICE CATEGORY DESCRIPTION SPECIFIC PRE-APPROVED SERVICE SUBCATEGORIES CATEGORY ---------------- -------------------------------- ------------------------------------------------- I. AUDIT Services that are directly o Accounting research assistance SERVICES related to performing the o SEC consultation, registration independent audit of the Funds statements, and reporting o Tax accrual related matters o Implementation of new accounting standards o Compliance letters (e.g. rating agency letters) o Regulatory reviews and assistance regarding financial matters o Semi-annual reviews (if requested) o Comfort letters for closed end offerings ---------------- -------------------------------- ------------------------------------------------- II. Services which are not o AICPA attest and agreed-upon procedures AUDIT-RELATED prohibited under Rule o Technology control assessments SERVICES 210.2-01(C)(4) (the "Rule") o Financial reporting control assessments and are related extensions of o Enterprise security architecture the audit services support the assessment audit, or use the knowledge/expertise gained from the audit procedures as a foundation to complete the project. In most cases, if the Audit-Related Services are not performed by the Audit firm, the scope of the Audit Services would likely increase. The Services are typically well-defined and governed by accounting professional standards (AICPA, SEC, etc.) ---------------- -------------------------------- ------------------------------------------------- ------------------------------------- ------------------------------------ AUDIT COMMITTEE APPROVAL POLICY AUDIT COMMITTEE REPORTING POLICY ------------------------------------- ------------------------------------ o "One-time" pre-approval o A summary of all such for the audit period for all services and related fees pre-approved specific service reported at each regularly subcategories. Approval of the scheduled Audit Committee independent auditors as meeting. auditors for a Fund shall constitute pre approval for these services. ------------------------------------- ------------------------------------ o "One-time" pre-approval o A summary of all such for the fund fiscal year within services and related fees a specified dollar limit (including comparison to for all pre-approved specified dollar limits) specific service subcategories reported quarterly. o Specific approval is needed to exceed the pre-approved dollar limit for these services (see general Audit Committee approval policy below for details on obtaining specific approvals) o Specific approval is needed to use the Fund's auditors for Audit-Related Services not denoted as "pre-approved", or to add a specific service subcategory as "pre-approved" ------------------------------------- ------------------------------------ SECTION III - POLICY DETAIL, CONTINUED ----------------------- --------------------------- ----------------------------------------------- SERVICE CATEGORY SERVICE CATEGORY SPECIFIC PRE-APPROVED SERVICE SUBCATEGORIES DESCRIPTION ----------------------- --------------------------- ----------------------------------------------- III. TAX SERVICES Services which are not o Tax planning and support prohibited by the Rule, o Tax controversy assistance if an officer of the Fund o Tax compliance, tax returns, excise determines that using the tax returns and support Fund's auditor to provide o Tax opinions these services creates significant synergy in the form of efficiency, minimized disruption, or the ability to maintain a desired level of confidentiality. ----------------------- --------------------------- ----------------------------------------------- ------------------------------------- ------------------------- AUDIT COMMITTEE APPROVAL POLICY AUDIT COMMITTEE REPORTING POLICY ------------------------------------- ------------------------- ------------------------------------- ------------------------- o "One-time" pre-approval o A summary of for the fund fiscal year all such services and within a specified dollar limit related fees 				 (including comparison 			 to specified dollar 			 limits) reported 			 quarterly. o Specific approval is needed to exceed the pre-approved dollar limits for these services (see general Audit Committee approval policy below for details on obtaining specific approvals) o Specific approval is needed to use the Fund's auditors for tax services not denoted as pre-approved, or to add a specific service subcategory as "pre-approved" ------------------------------------- ------------------------- SECTION III - POLICY DETAIL, CONTINUED ----------------------- --------------------------- ----------------------------------------------- SERVICE CATEGORY SERVICE CATEGORY SPECIFIC PRE-APPROVED SERVICE SUBCATEGORIES DESCRIPTION ----------------------- --------------------------- ----------------------------------------------- IV. OTHER SERVICES Services which are not o Business Risk Management support prohibited by the Rule, o Other control and regulatory A. SYNERGISTIC, if an officer of the Fund compliance projects UNIQUE QUALIFICATIONS determines that using the Fund's auditor to provide these services creates significant synergy in the form of efficiency, minimized disruption, the ability to maintain a desired level of confidentiality, or where the Fund's auditors posses unique or superior qualifications to provide these services, resulting in superior value and results for the Fund. ----------------------- --------------------------- ----------------------------------------------- --------------------------------------- ------------------------ AUDIT COMMITTEE APPROVAL POLICY AUDIT COMMITTEE REPORTING POLICY ------------------------------------- -------------------------- o "One-time" pre-approval o A summary of for the fund fiscal year within all such services and a specified dollar limit related fees 			 (including comparison 			 to specified dollar 				 limits) reported quarterly. o Specific approval is needed to exceed the pre-approved dollar limits for these services (see general Audit Committee approval policy below for details on obtaining specific approvals) o Specific approval is needed to use the Fund's auditors for "Synergistic" or "Unique Qualifications" Other Services not denoted as pre-approved to the left, or to add a specific service subcategory as "pre-approved" ------------------------------------- -------------------------- SECTION III - POLICY DETAIL, CONTINUED ----------------------- ------------------------- ----------------------------------------------- SERVICE CATEGORY SERVICE CATEGORY SPECIFIC PROHIBITED SERVICE SUBCATEGORIES DESCRIPTION ----------------------- ------------------------- ----------------------------------------------- PROHIBITED SERVICES Services which result 1. Bookkeeping or other services in the auditors losing related to the accounting records or independence status financial statements of the audit under the Rule. client* 2. Financial information systems design and implementation* 3. Appraisal or valuation services, fairness* opinions, or contribution-in-kind reports 4. Actuarial services (i.e., setting actuarial reserves versus actuarial audit work)* 5. Internal audit outsourcing services* 6. Management functions or human resources 7. Broker or dealer, investment advisor, or investment banking services 8. Legal services and expert services unrelated to the audit 9. Any other service that the Public Company Accounting Oversight Board determines, by regulation, is impermissible ----------------------- ------------------------- ----------------------------------------------- ------------------------------------------- ------------------------------ AUDIT COMMITTEE APPROVAL POLICY AUDIT COMMITTEE REPORTING POLICY ------------------------------------------- ------------------------------ o These services are not to be o A summary of all performed with the exception of the(*) services and related services that may be permitted fees reported at each if they would not be subject to audit regularly scheduled procedures at the audit client (as Audit Committee meeting defined in rule 2-01(f)(4)) level will serve as continual the firm providing the service. confirmation that has 				 not provided any restricted services. ------------------------------------------- ------------------------------ -------------------------------------------------------------------------------- GENERAL AUDIT COMMITTEE APPROVAL POLICY: o For all projects, the officers of the Funds and the Fund's auditors will each make an assessment to determine that any proposed projects will not impair independence. o Potential services will be classified into the four non-restricted service categories and the "Approval of Audit, Audit-Related, Tax and Other Services" Policy above will be applied. Any services outside the specific pre-approved service subcategories set forth above must be specifically approved by the Audit Committee. o At least quarterly, the Audit Committee shall review a report summarizing the services by service category, including fees, provided by the Audit firm as set forth in the above policy. -------------------------------------------------------------------------------- (2) Disclose the percentage of services described in each of paragraphs (b) through (d) of this Item that were approved by the audit committee pursuant to paragraph (c)(7)(i)(C) of Rule 2-01 of Regulation S-X. Non-Audit Services Beginning with non-audit service contracts entered into on or after May 6, 2003, the effective date of the new SEC pre-approval rules, the Trust's audit committee is required to pre-approve services to affiliates defined by SEC rules to the extent that the services are determined to have a direct impact on the operations or financial reporting of the Trust. For the years ended December 31, 2014 and 2013, 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. Aggregate Non-Audit Fees The aggregate non-audit fees for the Trust were $5,600 December 31, 2014 and $8,131 were paid to the former auditor, Ernst & Young LLP for the year ended December 31, 2013. (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 Trust's audit committee of the Board of Trustees has considered whether the provision of non-audit services that were rendered to the Affiliates (as defined) that were not pre-approved pursuant to paragraph (c)(7)(ii) of Rule 2-01 of Regulation S-X is compatible with maintaining the principal accountant's independence. ITEM 5. AUDIT COMMITTEE OF LISTED REGISTRANTS (a) If the registrant is a listed issuer as defined in Rule 10A-3 under the Exchange Act (17 CFR 240.10A-3), state whether or not the registrant has a separately-designated standing audit committee established in accordance with Section 3(a)(58)(A) of the Exchange Act (15 U.S.C. 78c(a)(58)(A)). If the registrant has such a committee, however designated, identify each committee member. If the entire board of directors is acting as the registrant's audit committee as specified in Section 3(a)(58)(B) of the Exchange Act (15 U.S.C. 78c(a)(58)(B)), so state. N/A (b) If applicable, provide the disclosure required by Rule 10A-3(d) under the Exchange Act (17 CFR 240.10A-3(d)) regarding an exemption from the listing standards for audit committees. N/A ITEM 6. SCHEDULE OF INVESTMENTS. File Schedule of Investments in securities of unaffiliated issuers as of the close of the reporting period as set forth in 210.1212 of Regulation S-X [17 CFR 210.12-12], unless the schedule is included as part of the report to shareholders filed under Item 1 of this Form. Included in Item 1 ITEM 7. DISCLOSURE OF PROXY VOTING POLICIES AND PROCEDURES FOR CLOSED-END MANAGEMENT INVESTMENT COMPANIES. A closed-end management investment company that is filing an annual report on this Form N-CSR must, unless it invests exclusively in non-voting securities, describe the policies and procedures that it uses to determine how to vote proxies relating to portfolio securities, including the procedures that the company uses when a vote presents a conflict between the interests of its shareholders, on the one hand, and those of the company's investment adviser; principal underwriter; or any affiliated person (as defined in Section 2(a)(3) of the Investment Company Act of 1940 (15 U.S.C. 80a-2(a)(3)) and the rules thereunder) of the company, its investment adviser, or its principal underwriter, on the other. Include any policies and procedures of the company's investment adviser, or any other third party, that the company uses, or that are used on the company's behalf, to determine how to vote proxies relating to portfolio securities. Not applicable to open-end management investment companies. ITEM 8. PORTFOLIO MANAGERS OF CLOSED-END MANAGEMENT INVESTMENT COMPANIES. (a) If the registrant is a closed-end management investment company that is filing an annual report on this Form N-CSR,provide the following information: (1) State the name, title, and length of service of the person or persons employed by or associated with the registrant or an investment adviser of the registrant who are primarily responsible for the day-to-day management of the registrant's portfolio ("Portfolio Manager"). Also state each Portfolio Manager's business experience during the past 5 years. Not applicable to open-end management investment companies. ITEM 9. PURCHASES OF EQUITY SECURITIES BY CLOSED-END MANAGEMENT INVESTMENT COMPANY AND AFFILIATED PURCHASERS. (a) If the registrant is a closed-end management investment company, in the following tabular format, provide the information specified in paragraph (b) of this Item with respect to any purchase made by or on behalf of the registrant or any affiliated purchaser, as defined in Rule 10b-18(a)(3) under the Exchange Act (17 CFR 240.10b-18(a)(3)), of shares or other units of any class of the registrant's equity securities that is registered by the registrant pursuant to Section 12 of the Exchange Act (15 U.S.C. 781). Not applicable to open-end management investment companies. ITEM 10. SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS. Describe any material changes to the procedures by which shareholders may recommend nominees to the registrant's board of directors, where those changes were implemented after the registrant last provided disclosure in response to the requirements of Item 407(c)(2)(iv) of Regulation S-R(17 CFR 229.407)(as required by Item 22(b)(15)) of Schedule 14A (17 CFR 240.14a-101), or this Item. There have been no material changes to the procedures by which the shareholders may recommend nominees to the registrant's board of directors since the registrant last provided disclosure in response to the requirements of Item 407(c)(2)(iv) of Regulation S-R of Schedule 14(A) in its definitive proxy statement, or this item. ITEM 11. CONTROLS AND PROCEDURES. (a) Disclose the conclusions of the registrant's principal executive and principal financials officers, or persons performing similar functions, regarding the effectiveness of the registrant's disclosure controls and procedures (as defined in Rule 30a-3(c) under the Act (17 CFR 270.30a-3(c))) as of a date within 90 days of the filing date of the report that includes the disclosure required by this paragraph, based on the evaluation of these controls and procedures required by Rule 30a-3(b) under the Act (17 CFR 270.30(a)-3(b) and Rules 13a-15(b) or 15d-15(b) under the Exchange Act (17 CFR 240.13a-15(b) or 240.15d-15(b)). The registrant's principal executive officer and principal financial officer have concluded that the registrant's disclosure controls and procedures are effective based on the evaluation of these controls and procedures as of a date within 90 days of the filing date of this report. (b) Disclose any change in the registrant's internal control over financial reporting (as defined in Rule 30a-3(d) under the Act (17CFR 270.30a-3(d)) that occured during the second fiscal quarter of the period covered by this report that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting. There were no significant changes in the registrant's internal control over financial reporting that occurred during the second fiscal quarter of the period covered by this report that have materially affected, or are reasonably likely to materially affect, the registrant's internal control over financial reporting. The registrant's principal executive officer and principal financial officer, however, voluntarily are reporting the following information: In August of 2006 the registrant's investment adviser enhanced its internal procedures for reporting performance information required to be included in prospectuses. Those enhancements involved additional internal controls over the appropriateness of performance data generated for this purpose. Such enhancements were made following an internal review which identified prospectuses relating to certain classes of shares of a limited number of registrants where, inadvertently, performance information not reflecting the deduction of applicable sales charges was included. Those prospectuses were revised, and the revised prospectuses were distributed to shareholders. ITEM 12. EXHIBITS. (a) File the exhibits listed below as part of this Form. Letter or number the exhibits in the sequence indicated. (1) Any code of ethics, or amendment thereto, that is the subject of the disclosure required by Item 2, to the extent that the registrant intends to satisfy the Item 2 requirements through filing of an exhibit. (2) A separate certification for each principal executive officer and principal financial officer of the registrant as required by Rule 30a-2(a) under the Act (17 CFR 270.30a-2(a)) , exactly as set forth below: Filed herewith. SIGNATURES [See General Instruction F] Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. (Registrant) Pioneer Series Trust XI By (Signature and Title)* /s/ Lisa M. Jones Lisa M. Jones, President & Chief Executive Officer Date February 27, 2015 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 February 27, 2015 By (Signature and Title)* /s/ Mark Bradley Mark Bradley, Treasurer & Chief Accounting & Financial Officer Date February 27, 2015 * Print the name and title of each signing officer under his or her signature.