Pioneer Government Income Fund -------------------------------------------------------------------------------- Annual Report | July 31, 2015 -------------------------------------------------------------------------------- Ticker Symbols: Class A AMGEX Class C GOVCX Class Y ATGIX [LOGO] PIONEER Investments(R) visit us: us.pioneerinvestments.com Table of Contents President's Letter 2 Portfolio Management Discussion 4 Portfolio Summary 8 Prices and Distributions 9 Performance Update 10 Comparing Ongoing Fund Expenses 13 Schedule of Investments 15 Financial Statements 31 Notes to Financial Statements 38 Report of Independent Registered Public Accounting Firm 46 Trustees, Officers and Service Providers 48 Pioneer Government Income Fund | Annual Report | 7/31/15 1 President's Letter Dear Shareowner, In the second half of 2015, two main issues have been dominating the attention of global investors and policymakers alike, and shaping the current investment environment: The Federal Reserve System's (the Fed's) deliberations over when to begin normalizing interest rates in the U.S., and the increasing divergence in economic activity around the globe. As 2015 began, market expectations were that the Fed would likely begin raising interest rates by the middle of the year, but a sluggish gross domestic product report in the first calendar quarter as well as relatively benign inflation and wage growth contributed to the Fed's taking a more cautionary approach and delaying the start of its rate-hike cycle. At the same time, however, the U.S. labor market has continued its robust improvement, moving the Fed closer to declaring victory on one of its main monetary policy objectives -- full employment. Meanwhile, global economic activity has continued to diverge, with developed economies experiencing above-trend growth and most emerging markets economies lagging the rest of the world. The slower pace of economic activity in the emerging markets has been most evident in China, as the country's economy continues to undergo a long, potentially painful adjustment from investment-led growth to consumption-oriented growth. This divergence in global economic cycles is likely to continue for some time, and we would expect an increased level of volatility as global capital markets and policymakers adjust. Pioneer Investments believes that investors in today's environment can potentially benefit from the consistent and disciplined investment approach we have used since our founding in 1928. We focus on identifying value across global markets using proprietary research, careful risk management, and a long-term perspective. Our ongoing goal is to produce compelling returns consistent with the stated objectives of our investment products, and with our shareowners' expectations. We believe our shareowners can benefit from the experience and tenure of our investment teams as well as the insights generated from our extensive research process. 2 Pioneer Government Income Fund | Annual Report | 7/31/15 As always, and particularly during times of market uncertainty, we encourage you to work with your financial advisor to develop an overall investment plan that addresses both your short-and long-term goals, and to implement such a plan in a disciplined manner. We greatly appreciate 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 Government Income Fund | Annual Report | 7/31/15 3 Portfolio Management Discussion | 7/31/15 Led by longer-maturity Treasuries, U.S. government securities produced positive performance over the 12-month period ended July 31, 2015, although interest rates began moving higher in the second half of the period, eroding some of the gains realized during the first six months. In the following interview, Richard Schlanger and Charles Melchreit discuss the investment environment and the factors that affected the performance of Pioneer Government Income Fund during the 12-month period. Mr. Schlanger, a vice president and a portfolio manager at Pioneer, and Mr. Melchreit, Director of Investment-Grade Management, a senior vice president and a portfolio manager at Pioneer, are responsible for the day-to-day management of the Fund. Q How did the Fund perform during the 12-month period ended July 31, 2015? A Pioneer Government Income Fund's Class A shares returned 1.83% at net asset value during the 12-month period ended July 31, 2015, while the Fund's benchmarks, the Barclays Government Bond Index and the Barclays U.S. Mortgage-Backed Securities Index, returned 3.26% and 3.54%, respectively. During the same period, the average return of the 70 mutual funds in Lipper's Intermediate U.S. Government Funds category was 2.22%, and the average return of the 313 mutual funds in Morningstar's Intermediate-Government Bond Funds category was 2.42%. Q How would you describe the investment environment for government securities during the 12-month period ended July 31, 2015? A The investment backdrop changed and became somewhat more volatile after the midpoint of the 12-month period, with longer-maturity government securities, notably U.S. Treasuries, giving up some of their gains from earlier in the period. Overall, the yield curve - which reflects the difference between yields of longer-maturity and shorter-maturity securities - flattened over the 12 months, with longer-maturity government securities outperforming shorter-maturity ones. After declining for a time, the yields of 10-Year Treasuries bottomed at 1.64% in mid-January 2015, and then began moving higher. The markets also became more volatile as a host of factors influenced investor sentiment, including: the perception that the U.S. economy was gaining strength, as monthly job gains averaged more than 200,000; the accompanying belief that the U.S. Federal Reserve System (the Fed) was preparing to tighten monetary policy by raising short-term interest rates; volatility in energy markets as oil prices declined early in the period, rose somewhat, and then dropped again towards the end of the 12 months; 4 Pioneer Government Income Fund | Annual Report | 7/31/15 concerns over the effects of an economic slowdown in China; the start of a quantitative easing policy by the European Central Bank (ECB); and certain global political and economic developments, including the threat that Greece would default on its debt obligations. In the government bond market, longer-maturity Treasuries outperformed other types of securities, although the early performance advantage of Treasuries was partially offset as the yield curve widened and longer- maturity interest rates moved higher over the final six months of the period. Q What were the principal factors that influenced the Fund's performance during the 12-month period ended July 31, 2015? Specifically, why did the Fund underperform its benchmarks during the period? A The Fund's benchmark-relative performance was hurt the most by the portfolio's shorter-duration stance relative to the Barclays Government Bond Index during the 12-month period. (Duration is a measure of the sensitivity of the price - the value of principal - of a fixed-income investment to a change in interest rates, expressed as a number of years.) The Fund, on average, had a 1.5-year shorter-than-benchmark duration during the period. We maintained the shorter positioning because we believed that interest rates were likely to begin rising, as we felt that the lower yields we were observing were inconsistent with a strengthening economy. Nevertheless, market interest rates declined, especially during the first half of the 12-month period, and longer-duration portfolios outperformed. Yield-curve positioning also detracted from the Fund's benchmark-relative performance, as the portfolio's underweight exposures to 30-year and five-year securities did not help. Although we significantly underweighted the Fund in outperforming U.S. Treasuries throughout the 12 months, the yield advantages of the portfolio's holdings of government-agency mortgages and government-agency debentures helped to compensate for the lack of exposure to Treasuries. While Treasuries accounted for approximately 90% of the Barclays Government Bond Index, they represented, on average, just 20% of the Fund's total investment portfolio over the fiscal year ended July 31, 2015. Allocations that helped support the Fund's results over the 12-month period included the portfolio's out-of-benchmark position in government- guaranteed commercial mortgages, which were used primarily to finance multi-family apartment developments. The securities performed quite well over the 12 months. Exposure to government-agency mortgages as well as good security selection results in the Fund's mortgage portfolio also helped performance, as we favored owning securities with lower prepayment risks, including higher-coupon mortgages with good state and servicer diversification. Pioneer Government Income Fund | Annual Report | 7/31/15 5 Q Did the Fund have any investments in derivative securities during the 12-month period ended July 31, 2015? If so, did the holdings affect benchmark-relative performance? A Yes, we invested in some Treasury futures contracts as part of our policy to maintain the Fund's shorter-than-benchmark duration. Because the shorter-duration positioning detracted from the Fund's benchmark-relative performance during the 12-month period, the use of the futures contracts detracted from relative returns. Q What factors affected the Fund's dividend distributions to shareholders during the 12-month period ended July 31, 2015? A The Fund's yield was relatively stable during the 12-month period. Looking forward, if market interest rates continue to climb and it becomes more likely that the Fed will start raising short-term rates, we think those factors would increase the possibility that the Fund's distributions to shareholders could start to rise. Q What is your investment outlook and how have you positioned the portfolio heading into the final months of 2015? A We believe prospects for the U.S. economy look good, although uncertainties continue to unsettle investor sentiment. In the United States, the economy - as measured by recently revised gross domestic product (GDP) figures - grew at an annual rate of nearly 4% during the second quarter of 2015, a noticeable improvement over the slight GDP increase of 0.6% in the first quarter. The job market continues to improve and the housing market appears to be healing, with household formation moving higher. All of those factors point to the Fed's starting to raise short-term interest rates very gradually before the end of the calendar year. Nevertheless, the market remains volatile. Slowing growth trends in China, combined with the devaluation of the Chinese currency and volatility in the Chinese equity markets, have caused much consternation among market participants. The debt situation in Greece remains a factor to be monitored. We have maintained the portfolio's short-duration stance relative to the benchmark, as we think the chances are increasing that interest rates will rise across the yield curve. We also continue to overweight the Fund in government-agency mortgages, while de-emphasizing Treasuries, which are highly interest-rate sensitive. Overall, we believe the portfolio is well positioned for an environment of continued economic growth in the United States, accompanied by gradually rising interest rates. 6 Pioneer Government Income Fund | Annual Report | 7/31/15 Please refer to the Schedule of Investments on pages 15-30 for a full listing of Fund securities. When interest rates rise, the prices of fixed-income securities in the Fund will generally fall. Conversely, when interest rates fall, the prices of fixed-income securities in the Fund will generally rise. Investments in the Fund are subject to possible loss due to the financial failure of the issuers of underlying securities and their inability to meet their debt obligations. Prepayment risk is the chance that an issuer may exercise its right to prepay its security, if falling interest rates prompt the issuer to do so. Forced to reinvest the unanticipated proceeds at lower interest rates, the Fund would experience a decline in income and lose the opportunity for additional price appreciation. The securities issued by U.S. government-sponsored entities (i.e., FNMA, Freddie Mac) are neither guaranteed nor issued by the U.S. government. The Fund may invest in mortgage-backed securities, which, during times of fluctuating interest rates, may increase or decrease more than other fixed-income securities. Mortgage-backed securities are also subject to prepayments. 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. 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. Pioneer Government Income Fund | Annual Report | 7/31/15 7 Portfolio Summary | 7/31/15 Portfolio Diversification -------------------------------------------------------------------------------- (As a percentage of total investment portfolio) [THE FOLLOWING DATA WAS REPRESENTED AS A PIE CHART IN THE PRINTED MATERIAL] U.S. Government Securities 75.0% Collateralized Mortgage Obligations 13.9% Foreign Government Bonds 5.8% Asset Backed Securities 4.2% Municipal Bonds 0.6% U.S. Corporate Bonds 0.5% Portfolio Maturity -------------------------------------------------------------------------------- (As a percentage of total investment portfolio) 0-2 Years 5.8% 2-5 Years 38.0% 5-7 Years 38.5% 7-10 Years 10.3% 20+ Years 7.4% 10 Largest Holdings -------------------------------------------------------------------------------- (As a percentage of total long-term holdings)* 1. U.S. Treasury Notes, 1.875%, 8/31/17 5.10% -------------------------------------------------------------------------------- 2. Fannie Mae, 4.5%, 12/1/43 4.93 -------------------------------------------------------------------------------- 3. Private Export Funding Corp., 4.3%, 12/15/21 3.68 -------------------------------------------------------------------------------- 4. Israel Government AID Bond, 5.5%, 4/26/24 3.52 -------------------------------------------------------------------------------- 5. U.S. Treasury Notes, 2.625%, 11/15/20 3.52 -------------------------------------------------------------------------------- 6. Private Export Funding Corp., 4.375%, 3/15/19 3.17 -------------------------------------------------------------------------------- 7. U.S. Treasury Bonds, 4.25%, 5/15/39 2.98 -------------------------------------------------------------------------------- 8. Federal National Mortgage Association, 4.92%, 7/25/20 2.98 -------------------------------------------------------------------------------- 9. Fannie Mae, 4.0%, 4/1/39 2.89 -------------------------------------------------------------------------------- 10. U.S. Treasury Notes, 0.625%, 5/31/17 2.87 -------------------------------------------------------------------------------- * This list excludes temporary cash investments and derivative instruments. The portfolio is actively managed, and current holdings may be different. The holdings listed should not be considered recommendations to buy or sell any security listed. 8 Pioneer Government Income Fund | Annual Report | 7/31/15 Prices and Distributions | 7/31/15 Net Asset Value per Share -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- Class 7/31/15 7/31/14 -------------------------------------------------------------------------------- A $9.39 $9.42 -------------------------------------------------------------------------------- C $9.39 $9.42 -------------------------------------------------------------------------------- Y $9.40 $9.43 -------------------------------------------------------------------------------- Distributions per Share: 8/1/14-7/31/15 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- Net Investment Short-Term Long-Term Class Income Capital Gains Capital Gains -------------------------------------------------------------------------------- A $0.2020 $-- $-- -------------------------------------------------------------------------------- C $0.1326 $-- $-- -------------------------------------------------------------------------------- Y $0.2330 $-- $-- -------------------------------------------------------------------------------- Index Definitions -------------------------------------------------------------------------------- The Barclays Government Bond Index is an unmanaged index that measures the performance of the U.S. government bond market. The Barclays U.S. Mortgage-Backed Securities Index is an unmanaged index including 15- and 30-year fixed-rate securities backed by mortgage pools of the Government National Mortgage Association (GNMA), Federal Home Loan Mortgage Corporation (FHLMC) and Federal National Mortgage Association (FNMA). Index returns are calculated monthly, assume reinvestment of dividends and, unlike Fund returns, do not reflect any fees, expenses or sales charges. It is not possible to invest directly in an index. The indices defined here pertain to the "Value of $10,000 Investment" and "Value of $5 Million Investment" charts on pages 10-12. Pioneer Government Income Fund | Annual Report | 7/31/15 9 Performance Update | 7/31/15 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 Government Income Fund at public offering price during the periods shown, compared to that of the Barclays Government Bond Index and the Barclays U.S. Mortgage-Backed Securities Index. Average Annual Total Returns (As of July 31, 2015) -------------------------------------------------------------------------------- Barclays U.S. Net Public Barclays Mortgage- Asset Offering Government Backed Value Price Bond Securities Period (NAV) (POP) Index Index -------------------------------------------------------------------------------- 10 Years 3.69% 3.22% 4.20% 4.68% 5 Years 1.93 0.99 2.66 2.85 1 Year 1.83 -2.71 3.26 3.54 -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated December 1, 2014) -------------------------------------------------------------------------------- Gross -------------------------------------------------------------------------------- 1.28% -------------------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $10,000 Investment Barclays U.S. Pioneer Government Barclays Government Mortgage-Backed Income Fund Bond Index Securities Index 7/31/2005 $ 9,550 $10,000 $10,000 7/31/2006 $ 9,627 $10,124 $10,235 7/31/2007 $10,054 $10,711 $10,808 7/31/2008 $10,706 $11,634 $11,560 7/31/2009 $11,624 $12,411 $12,766 7/31/2010 $12,482 $13,238 $13,725 7/31/2011 $12,851 $13,670 $14,253 7/31/2012 $13,625 $14,703 $14,943 7/31/2013 $13,211 $14,330 $14,647 7/31/2014 $13,484 $14,618 $15,254 7/31/2015 $13,732 $15,095 $15,793 Call 1-800-225-6292 or visit us.pioneerinvestments.com for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. NAV results represent the percent change in net asset value per share. Returns would have been lower had sales charges been reflected. POP returns reflect deduction of maximum 4.50% sales charge. All results are historical and assume the reinvestment of dividends and capital gains. Other share classes are available for which performance and expenses will differ. Pioneer Government Income Fund acquired the assets and liabilities of AmSouth Government Income Fund on September 23, 2005. The performance shown for Class A shares of the Fund for periods prior to September 23, 2005, is based on the performance of AmSouth Government Income Fund's Class A shares prior to the reorganization, which has been restated to reflect differences in any applicable sales charges (but not differences in expenses). If the performance had been adjusted to reflect all differences in expenses, the performance of Class A shares of the Fund would be lower than that shown. 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. 10 Pioneer Government Income Fund | Annual Report | 7/31/15 Performance Update | 7/31/15 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 Government Income Fund during the periods shown, compared to that of the Barclays Government Bond Index and the Barclays U.S. Mortgage-Backed Securities Index. Average Annual Total Returns (As of July 31, 2015) -------------------------------------------------------------------------------- Barclays U.S. Barclays Mortgage- Government Backed If If Bond Securities Period Held Redeemed Index Index -------------------------------------------------------------------------------- 10 Years 2.93% 2.93% 4.20% 4.68% 5 Years 1.21 1.21 2.66 2.85 1 Year 1.09 1.09 3.26 3.54 -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated December 1, 2014) -------------------------------------------------------------------------------- Gross -------------------------------------------------------------------------------- 2.02% -------------------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $10,000 Investment Barclays U.S. Pioneer Government Barclays Government Mortgage-Backed Income Fund Bond Index Securities Index 7/31/2005 $10,000 $10,000 $10,000 7/31/2006 $ 9,982 $10,124 $10,235 7/31/2007 $10,355 $10,711 $10,808 7/31/2008 $10,945 $11,634 $11,560 7/31/2009 $11,799 $12,411 $12,766 7/31/2010 $12,565 $13,238 $13,725 7/31/2011 $12,857 $13,670 $14,253 7/31/2012 $13,537 $14,703 $14,943 7/31/2013 $13,039 $14,330 $14,647 7/31/2014 $13,201 $14,618 $15,254 7/31/2015 $13,345 $15,095 $15,793 Call 1-800-225-6292 or visit us.pioneerinvestments.com for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. Class C shares held for less than one year are also subject to a 1% contingent deferred sales charge (CDSC). "If Held" results represent the percent change in net asset value per share. Returns would have been lower had sales charges been reflected. All results are historical and assume the reinvestment of dividends and capital gains. Other share classes are available for which performance and expenses will differ. Pioneer Government Income Fund acquired the assets and liabilities of AmSouth Government Income Fund on September 23, 2005. The performance shown for Class C shares of the Fund for periods prior to September 23, 2005, is based upon the performance of the predecessor Fund's Class B shares as adjusted to reflect sales charges applicable to Class C shares (but not other differences in expenses). If the performance had been adjusted to reflect all differences in expenses, the performance of Class C shares of the Fund would be lower than that shown. 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 Government Income Fund | Annual Report | 7/31/15 11 Performance Update | 7/31/15 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 Government Income Fund during the periods shown, compared to that of the Barclays Government Bond Index and Barclays U.S. Mortgage-Backed Securities Index. Average Annual Total Returns (As of July 31, 2015) -------------------------------------------------------------------------------- Barclays U.S. Barclays Mortgage- Net Asset Government Backed Value Bond Securities Period (NAV) Index Index -------------------------------------------------------------------------------- 10 Years 4.12% 4.20% 4.68% 5 Years 2.33 2.66 2.85 1 Year 2.17 3.26 3.54 -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated December 1, 2014) -------------------------------------------------------------------------------- Gross -------------------------------------------------------------------------------- 0.92% -------------------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $5 Million Investment Barclays U.S. Pioneer Government Barclays Government Mortgage-Backed Income Fund Bond Index Securities Index 7/31/2005 $5,000,000 $5,000,000 $5,000,000 7/31/2006 $5,054,027 $5,061,992 $5,117,317 7/31/2007 $5,301,322 $5,355,667 $5,403,957 7/31/2008 $5,671,289 $5,817,089 $5,779,866 7/31/2009 $6,192,340 $6,205,318 $6,382,901 7/31/2010 $6,672,230 $6,619,194 $6,862,699 7/31/2011 $6,893,775 $6,834,921 $7,126,654 7/31/2012 $7,345,963 $7,351,707 $7,471,733 7/31/2013 $7,151,504 $7,165,157 $7,323,706 7/31/2014 $7,328,811 $7,309,060 $7,626,872 7/31/2015 $7,487,675 $7,547,371 $7,896,508 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. Pioneer Government Income Fund acquired the assets and liabilities of AmSouth Government Income Fund on September 23, 2005. The performance shown for Class Y shares of the Fund for periods prior to September 23, 2005, is based on the performance of AmSouth Government Income Fund's Class I shares prior to the reorganization, which has been restated to reflect differences in any applicable sales charges (but not differences in expenses). If the performance had been adjusted to reflect all differences in expenses, the performance of Class Y shares of the Fund would be lower 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. 12 Pioneer Government Income Fund | Annual Report | 7/31/15 Comparing Ongoing Fund Expenses As a shareowner in the Fund, you incur two types of costs: (1) ongoing costs, including management fees, distribution and/or service (12b-1) fees, and other Fund expenses; and (2) transaction costs, including sales charges (loads) on purchase payments. This example is intended to help you understand your ongoing expenses (in dollars) of investing in the Fund and to compare these costs with the ongoing costs of investing in other mutual funds. The example is based on an investment of $1,000 at the beginning of the Fund's latest six-month period and held throughout the six months. Using the Tables -------------------------------------------------------------------------------- Actual Expenses The first table below provides information about actual account values and actual expenses. You may use the information in this table, together with the amount you invested, to estimate the expenses that you paid over the period as follows: (1) Divide your account value by $1,000 Example: an $8,600 account value (divided by) $1,000 = 8.6 (2) Multiply the result in (1) above by the corresponding share class's number in the third row under the heading entitled "Expenses Paid During Period" to estimate the expenses you paid on your account during this period. Expenses Paid on a $1,000 Investment in Pioneer Government Income Fund Based on actual returns from February 1, 2015, through July 31, 2015. -------------------------------------------------------------------------------- Share Class A C Y -------------------------------------------------------------------------------- Beginning Account $1,000.00 $1,000.00 $1,000.00 Value on 2/1/15 -------------------------------------------------------------------------------- Ending Account Value $ 993.95 $ 990.50 $ 996.68 (after expenses) on 7/31/15 -------------------------------------------------------------------------------- Expenses Paid . $ 6.58 $ 9.97 $ 4.75 During Period* -------------------------------------------------------------------------------- * Expenses are equal to the Fund's annualized expense ratio of 1.33%, 2.02%, and 0.96% for Class A, C, and Y respectively, multiplied by the average account value over the period, multiplied by 181/365 (to reflect the one-half year period). Pioneer Government Income Fund | Annual Report | 7/31/15 13 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 Government Income Fund Based on a hypothetical 5% return per year before expenses, reflecting the period from February 1, 2015, through July 31, 2015. -------------------------------------------------------------------------------- Share Class A C Y -------------------------------------------------------------------------------- Beginning Account $1,000.00 $1,000.00 $1,000.00 Value on 2/1/15 Ending Account Value $1,018.20 $1,014.78 $1,020.03 (after expenses) on 7/31/15 Expenses Paid $ 6.66 $ 10.09 $ 4.81 During Period* * Expenses are equal to the Fund's annualized expense ratio of 1.33%, 2.02%, and 0.96% for Class A, C, and Y respectively, multiplied by the average account value over the period, multiplied by 181/365 (to reflect the one-half year period). 14 Pioneer Government Income Fund | Annual Report | 7/31/15 Schedule of Investments | 7/31/15 ------------------------------------------------------------------------------------------ Floating Principal Rate (b) Amount ($) (unaudited) Value ------------------------------------------------------------------------------------------ ASSET BACKED SECURITIES -- 4.1% DIVERSIFIED FINANCIALS -- 4.1% Other Diversified Financial Services -- 4.1% 301,904 Small Business Administration Participation Certificates, 4.2%, 9/1/29 $ 322,022 538,769 Small Business Administration Participation Certificates, 4.625%, 2/1/25 572,541 554,158 Small Business Administration Participation Certificates, 4.84%, 5/1/25 591,991 636,493 Small Business Administration Participation Certificates, 5.37%, 4/1/28 709,783 438,261 Small Business Administration Participation Certificates, 5.63%, 10/1/28 488,504 129,690 Small Business Administration Participation Certificates, 5.72%, 1/1/29 146,618 794,685 Small Business Administration Participation Certificates, 6.02%, 8/1/28 901,921 148,985 Small Business Administration Participation Certificates, 6.14%, 1/1/22 162,708 398,011 Small Business Administration Participation Certificates, 6.22%, 12/1/28 452,768 ------------- $ 4,348,856 ------------- Total Diversified Financials $ 4,348,856 ------------------------------------------------------------------------------------------ TOTAL ASSET BACKED SECURITIES (Cost $4,035,535) $ 4,348,856 ------------------------------------------------------------------------------------------ COLLATERALIZED MORTGAGE OBLIGATIONS -- 13.7% BANKS -- 4.2% Thrifts & Mortgage Finance -- 4.2% 897,622 Government National Mortgage Association REMICS, 3.25%, 4/16/27 $ 936,673 1,242,383 3.17 La Hipotecaria Panamanian Mortgage Trust 2010-1, Floating Rate Note, 9/8/39 (144A) 1,283,537 280,109 3.26 La Hipotecaria Panamanian Mortgage Trust 2014-1, Floating Rate Note, 11/24/42 (144A) 286,936 574,337 Vendee Mortgage Trust 2008-1, 5.25%, 1/15/32 637,879 1,174,449 Vendee Mortgage Trust 2010-1, 4.25%, 2/15/35 1,262,603 ------------- $ 4,407,628 ------------- Total Banks $ 4,407,628 ------------------------------------------------------------------------------------------ The accompanying notes are an integral part of these financial statements. Pioneer Government Income Fund | Annual Report | 7/31/15 15 Schedule of Investments | 7/31/15 (continued) ------------------------------------------------------------------------------------------ Floating Principal Rate (b) Amount ($) (unaudited) Value ------------------------------------------------------------------------------------------ DIVERSIFIED FINANCIALS -- 1.7% Other Diversified Financial Services -- 1.7% 1,687,946 Federal National Mortgage Association REMICS, 3.0%, 6/25/23 $ 1,760,724 ------------- Total Diversified Financials $ 1,760,724 ------------------------------------------------------------------------------------------ GOVERNMENT -- 7.8% Government -- 7.8% 131,094 0.59 Federal Home Loan Mortgage Corp. REMICS, Floating Rate Note, 12/15/20 $ 131,914 981,985 3.42 Federal National Mortgage Association 2004-T2, Floating Rate Note, 7/25/43 1,020,793 92,277 Federal National Mortgage Association REMICS, 4.5%, 6/25/29 99,149 2,925,541 Federal National Mortgage Association, 4.92%, 7/25/20 3,107,492 1,451,380 Government National Mortgage Association REMICS, 2.1%, 2/16/48 1,460,894 126,088 Government National Mortgage Association, 5.25%, 8/16/35 141,596 2,000,000 4.65 Government National Mortgage Association, Floating Rate Note, 1/16/50 2,181,112 162,951 0.63 Government National Mortgage Association, Floating Rate Note, 12/16/29 163,656 ------------- $ 8,306,606 ------------- Total Government $ 8,306,606 ------------------------------------------------------------------------------------------ TOTAL COLLATERALIZED MORTGAGE OBLIGATIONS (Cost $13,966,877) $ 14,474,958 ------------------------------------------------------------------------------------------ CORPORATE BONDS -- 0.5% DIVERSIFIED FINANCIALS -- 0.5% Other Diversified Financial Services -- 0.5% 501,785 Helios Leasing I LLC, 2.018%, 5/29/24 $ 500,487 ------------- Total Diversified Financials $ 500,487 ------------------------------------------------------------------------------------------ TOTAL CORPORATE BONDS (Cost $541,524) $ 500,487 ------------------------------------------------------------------------------------------ U.S. GOVERNMENT AND AGENCY OBLIGATIONS -- 74.0% 356,380 Fannie Mae, 3.5%, 4/1/45 $ 370,185 1,297,573 Fannie Mae, 3.763%, 12/1/20 1,395,797 2,715,042 Fannie Mae, 4.0%, 10/1/41 2,901,082 552,685 Fannie Mae, 4.0%, 4/1/25 589,720 2,832,586 Fannie Mae, 4.0%, 4/1/39 3,014,282 1,800,827 Fannie Mae, 4.0%, 4/1/41 1,925,533 The accompanying notes are an integral part of these financial statements. 16 Pioneer Government Income Fund | Annual Report | 7/31/15 ------------------------------------------------------------------------------------------ Floating Principal Rate (b) Amount ($) (unaudited) Value ------------------------------------------------------------------------------------------ U.S. GOVERNMENT AND AGENCY OBLIGATIONS -- (continued) 831,997 Fannie Mae, 4.0%, 7/1/44 $ 886,942 78,525 Fannie Mae, 4.0%, 9/1/20 82,368 23,027 Fannie Mae, 4.5%, 11/1/20 24,142 4,682,260 Fannie Mae, 4.5%, 12/1/43 5,146,968 109,452 Fannie Mae, 5.0%, 1/1/20 117,366 264,376 Fannie Mae, 5.0%, 10/1/34 287,846 1,348,575 Fannie Mae, 5.0%, 2/1/39 1,495,222 114,487 Fannie Mae, 5.0%, 3/1/23 123,723 271,846 Fannie Mae, 5.0%, 7/1/34 295,488 92,862 Fannie Mae, 5.0%, 8/1/18 97,211 63,616 Fannie Mae, 5.72%, 11/1/28 72,345 47,112 Fannie Mae, 5.72%, 6/1/29 53,622 62,884 Fannie Mae, 5.75%, 3/1/33 71,933 31,968 Fannie Mae, 5.9%, 11/1/27 36,409 17,509 Fannie Mae, 5.9%, 2/1/28 17,615 89,591 Fannie Mae, 5.9%, 4/1/28 102,008 325,022 Fannie Mae, 6.0%, 11/1/34 371,044 32,358 Fannie Mae, 6.0%, 11/1/34 36,700 50,317 Fannie Mae, 6.0%, 12/1/37 57,005 69,874 Fannie Mae, 6.5%, 11/1/47 78,064 128,295 Fannie Mae, 6.5%, 7/1/32 149,013 933,400 Federal Home Loan Mortgage Corp., 3.5%, 12/1/44 967,770 1,189,493 Federal Home Loan Mortgage Corp., 3.5%, 4/1/45 1,233,293 745,443 Federal Home Loan Mortgage Corp., 4.0%, 6/1/42 791,801 110,400 Federal Home Loan Mortgage Corp., 5.0%, 10/1/38 121,360 102,249 Federal Home Loan Mortgage Corp., 5.0%, 9/1/38 112,396 20,387 Federal Home Loan Mortgage Corp., 5.5%, 1/1/34 22,765 114,068 Federal Home Loan Mortgage Corp., 6.0%, 1/1/33 130,265 140,697 Federal Home Loan Mortgage Corp., 6.0%, 1/1/38 158,874 51,928 Federal Home Loan Mortgage Corp., 6.0%, 11/1/33 58,776 3,336 Federal Home Loan Mortgage Corp., 6.0%, 5/1/16 3,384 3,027 Federal Home Loan Mortgage Corp., 6.0%, 6/1/16 3,074 The accompanying notes are an integral part of these financial statements. Pioneer Government Income Fund | Annual Report | 7/31/15 17 Schedule of Investments | 7/31/15 (continued) ------------------------------------------------------------------------------------------ Floating Principal Rate (b) Amount ($) (unaudited) Value ------------------------------------------------------------------------------------------ U.S. GOVERNMENT AND AGENCY OBLIGATIONS -- (continued) 73,160 Federal Home Loan Mortgage Corp., 6.0%, 7/1/36 $ 82,818 20,834 Federal Home Loan Mortgage Corp., 6.0%, 7/1/36 23,744 138,495 Federal Home Loan Mortgage Corp., 6.0%, 7/1/38 156,370 14,417 Federal Home Loan Mortgage Corp., 6.0%, 8/1/18 16,276 10,767 Federal Home Loan Mortgage Corp., 6.5%, 5/1/31 12,303 75,429 Federal Home Loan Mortgage Corp., 7.0%, 10/1/46 85,760 4,226 Federal Home Loan Mortgage Corp., 7.0%, 6/1/31 4,240 923,178 Federal National Mortgage Association, 3.0%, 12/1/21 962,308 2,000,000 Financing Corp. Fico, 5/11/18 (c) 1,933,442 914,659 Government National Mortgage Association I, 3.5%, 1/15/44 960,396 688,668 Government National Mortgage Association I, 3.5%, 1/15/45 719,753 895,597 Government National Mortgage Association I, 3.5%, 7/15/42 939,625 600,558 Government National Mortgage Association I, 4.0%, 1/15/45 641,964 135,044 Government National Mortgage Association I, 4.0%, 3/15/44 143,835 261,701 Government National Mortgage Association I, 4.0%, 7/15/41 279,251 386,911 Government National Mortgage Association I, 4.0%, 8/15/40 413,157 133,351 Government National Mortgage Association I, 4.0%, 9/15/40 142,137 186,718 Government National Mortgage Association I, 4.0%, 9/15/44 198,873 27,943 Government National Mortgage Association I, 4.5%, 12/15/19 29,621 28,742 Government National Mortgage Association I, 4.5%, 4/15/18 30,097 74,896 Government National Mortgage Association I, 4.5%, 4/15/20 79,396 61,064 Government National Mortgage Association I, 4.5%, 6/15/19 64,907 263,510 Government National Mortgage Association I, 4.5%, 6/15/25 280,320 The accompanying notes are an integral part of these financial statements. 18 Pioneer Government Income Fund | Annual Report | 7/31/15 ------------------------------------------------------------------------------------------ Floating Principal Rate (b) Amount ($) (unaudited) Value ------------------------------------------------------------------------------------------ U.S. GOVERNMENT AND AGENCY OBLIGATIONS -- (continued) 18,613 Government National Mortgage Association I, 4.5%, 8/15/19 $ 19,587 77,222 Government National Mortgage Association I, 5.0%, 2/15/19 82,336 322,242 Government National Mortgage Association I, 5.0%, 7/15/40 357,369 56,334 Government National Mortgage Association I, 5.5%, 1/15/29 63,317 70,238 Government National Mortgage Association I, 5.5%, 10/15/19 73,872 81,865 Government National Mortgage Association I, 5.5%, 10/15/33 94,017 57,471 Government National Mortgage Association I, 5.5%, 10/15/34 65,514 29,799 Government National Mortgage Association I, 5.5%, 4/15/19 31,061 39,934 Government National Mortgage Association I, 5.5%, 4/15/31 44,866 23,870 Government National Mortgage Association I, 5.5%, 6/15/18 24,744 169,936 Government National Mortgage Association I, 5.5%, 8/15/33 195,412 81,528 Government National Mortgage Association I, 5.5%, 9/15/33 92,712 21,166 Government National Mortgage Association I, 5.72%, 4/15/29 23,803 19,504 Government National Mortgage Association I, 6.0%, 1/15/24 22,254 41,535 Government National Mortgage Association I, 6.0%, 1/15/33 48,098 71,192 Government National Mortgage Association I, 6.0%, 1/15/33 82,877 8,060 Government National Mortgage Association I, 6.0%, 10/15/28 9,236 19,051 Government National Mortgage Association I, 6.0%, 10/15/32 21,525 75,403 Government National Mortgage Association I, 6.0%, 10/15/32 85,194 87,915 Government National Mortgage Association I, 6.0%, 10/15/34 101,980 67,679 Government National Mortgage Association I, 6.0%, 10/15/34 77,165 180,616 Government National Mortgage Association I, 6.0%, 10/15/34 210,104 8,474 Government National Mortgage Association I, 6.0%, 11/15/32 9,575 The accompanying notes are an integral part of these financial statements. Pioneer Government Income Fund | Annual Report | 7/31/15 19 Schedule of Investments | 7/31/15 (continued) ------------------------------------------------------------------------------------------ Floating Principal Rate (b) Amount ($) (unaudited) Value ------------------------------------------------------------------------------------------ U.S. GOVERNMENT AND AGENCY OBLIGATIONS -- (continued) 10,034 Government National Mortgage Association I, 6.0%, 11/15/32 $ 11,480 144,178 Government National Mortgage Association I, 6.0%, 11/15/33 164,868 59,260 Government National Mortgage Association I, 6.0%, 11/15/37 67,445 222,596 Government National Mortgage Association I, 6.0%, 12/15/23 251,499 157,281 Government National Mortgage Association I, 6.0%, 12/15/32 178,966 433,307 Government National Mortgage Association I, 6.0%, 12/15/32 501,600 119,327 Government National Mortgage Association I, 6.0%, 12/15/32 138,334 21,731 Government National Mortgage Association I, 6.0%, 12/15/32 25,297 93,595 Government National Mortgage Association I, 6.0%, 12/15/32 106,810 220,530 Government National Mortgage Association I, 6.0%, 12/15/32 251,413 23,021 Government National Mortgage Association I, 6.0%, 12/15/32 26,777 86,835 Government National Mortgage Association I, 6.0%, 2/15/29 101,012 123,105 Government National Mortgage Association I, 6.0%, 2/15/33 143,314 30,365 Government National Mortgage Association I, 6.0%, 2/15/33 34,308 172,863 Government National Mortgage Association I, 6.0%, 2/15/33 201,752 103,641 Government National Mortgage Association I, 6.0%, 2/15/33 118,698 54,184 Government National Mortgage Association I, 6.0%, 3/15/19 61,219 76,913 Government National Mortgage Association I, 6.0%, 3/15/33 86,899 57,820 Government National Mortgage Association I, 6.0%, 3/15/33 66,185 46,319 Government National Mortgage Association I, 6.0%, 3/15/33 53,849 220,536 Government National Mortgage Association I, 6.0%, 3/15/34 256,624 63,783 Government National Mortgage Association I, 6.0%, 4/15/28 74,266 24,527 Government National Mortgage Association I, 6.0%, 4/15/33 28,095 The accompanying notes are an integral part of these financial statements. 20 Pioneer Government Income Fund | Annual Report | 7/31/15 ------------------------------------------------------------------------------------------ Floating Principal Rate (b) Amount ($) (unaudited) Value ------------------------------------------------------------------------------------------ U.S. GOVERNMENT AND AGENCY OBLIGATIONS -- (continued) 43,427 Government National Mortgage Association I, 6.0%, 5/15/33 $ 49,703 116,148 Government National Mortgage Association I, 6.0%, 6/15/31 132,446 82,182 Government National Mortgage Association I, 6.0%, 6/15/34 95,696 45,781 Government National Mortgage Association I, 6.0%, 8/15/34 52,037 211,125 Government National Mortgage Association I, 6.0%, 8/15/34 242,018 127,859 Government National Mortgage Association I, 6.0%, 8/15/38 145,739 309,476 Government National Mortgage Association I, 6.0%, 9/15/32 354,138 78,608 Government National Mortgage Association I, 6.0%, 9/15/32 89,852 19,619 Government National Mortgage Association I, 6.0%, 9/15/33 22,166 31,904 Government National Mortgage Association I, 6.0%, 9/15/34 36,608 178,617 Government National Mortgage Association I, 6.0%, 9/15/35 207,808 54,750 Government National Mortgage Association I, 6.5%, 1/15/32 62,476 35,231 Government National Mortgage Association I, 6.5%, 10/15/24 40,307 26,374 Government National Mortgage Association I, 6.5%, 10/15/28 30,337 6,716 Government National Mortgage Association I, 6.5%, 10/15/28 7,664 46,562 Government National Mortgage Association I, 6.5%, 11/15/31 53,133 15,160 Government National Mortgage Association I, 6.5%, 2/15/28 17,299 26,665 Government National Mortgage Association I, 6.5%, 2/15/29 31,052 31,007 Government National Mortgage Association I, 6.5%, 2/15/32 35,382 29,558 Government National Mortgage Association I, 6.5%, 2/15/32 35,415 22,246 Government National Mortgage Association I, 6.5%, 2/15/32 26,331 10,395 Government National Mortgage Association I, 6.5%, 2/15/32 11,862 19,353 Government National Mortgage Association I, 6.5%, 2/15/32 22,789 The accompanying notes are an integral part of these financial statements. Pioneer Government Income Fund | Annual Report | 7/31/15 21 Schedule of Investments | 7/31/15 (continued) ------------------------------------------------------------------------------------------ Floating Principal Rate (b) Amount ($) (unaudited) Value ------------------------------------------------------------------------------------------ U.S. GOVERNMENT AND AGENCY OBLIGATIONS -- (continued) 19,172 Government National Mortgage Association I, 6.5%, 3/15/29 $ 21,878 91,144 Government National Mortgage Association I, 6.5%, 3/15/29 104,006 105,632 Government National Mortgage Association I, 6.5%, 3/15/32 121,859 12,065 Government National Mortgage Association I, 6.5%, 4/15/17 12,178 14,525 Government National Mortgage Association I, 6.5%, 4/15/28 16,575 81,371 Government National Mortgage Association I, 6.5%, 4/15/28 92,854 96,179 Government National Mortgage Association I, 6.5%, 4/15/32 113,563 7,858 Government National Mortgage Association I, 6.5%, 4/15/32 8,967 17,496 Government National Mortgage Association I, 6.5%, 4/15/32 20,365 50,614 Government National Mortgage Association I, 6.5%, 4/15/33 57,762 6,709 Government National Mortgage Association I, 6.5%, 5/15/29 7,656 41,284 Government National Mortgage Association I, 6.5%, 5/15/31 47,110 19,209 Government National Mortgage Association I, 6.5%, 5/15/32 22,852 8,291 Government National Mortgage Association I, 6.5%, 5/15/32 9,606 45,143 Government National Mortgage Association I, 6.5%, 5/15/32 51,513 6,237 Government National Mortgage Association I, 6.5%, 5/15/32 7,118 10,244 Government National Mortgage Association I, 6.5%, 6/15/17 10,272 12,061 Government National Mortgage Association I, 6.5%, 6/15/28 14,084 27,876 Government National Mortgage Association I, 6.5%, 6/15/29 31,810 8,409 Government National Mortgage Association I, 6.5%, 6/15/31 9,596 22,187 Government National Mortgage Association I, 6.5%, 6/15/32 25,318 17,463 Government National Mortgage Association I, 6.5%, 6/15/32 20,053 38,989 Government National Mortgage Association I, 6.5%, 7/15/31 44,491 The accompanying notes are an integral part of these financial statements. 22 Pioneer Government Income Fund | Annual Report | 7/31/15 ------------------------------------------------------------------------------------------ Floating Principal Rate (b) Amount ($) (unaudited) Value ------------------------------------------------------------------------------------------ U.S. GOVERNMENT AND AGENCY OBLIGATIONS -- (continued) 10,714 Government National Mortgage Association I, 6.5%, 7/15/32 $ 12,226 9,380 Government National Mortgage Association I, 6.5%, 7/15/32 10,704 10,004 Government National Mortgage Association I, 6.5%, 8/15/28 11,415 36,782 Government National Mortgage Association I, 6.5%, 8/15/32 41,973 51,935 Government National Mortgage Association I, 6.5%, 8/15/32 59,622 24,174 Government National Mortgage Association I, 6.5%, 9/15/31 27,585 24,992 Government National Mortgage Association I, 6.5%, 9/15/32 30,113 45,668 Government National Mortgage Association I, 6.5%, 9/15/32 52,201 47,041 Government National Mortgage Association I, 6.5%, 9/15/32 53,912 8,400 Government National Mortgage Association I, 6.75%, 4/15/26 9,585 19,437 Government National Mortgage Association I, 7.0%, 1/15/28 21,864 144,044 Government National Mortgage Association I, 7.0%, 1/15/31 155,097 3,438 Government National Mortgage Association I, 7.0%, 10/15/16 3,448 12,871 Government National Mortgage Association I, 7.0%, 11/15/26 14,884 69,390 Government National Mortgage Association I, 7.0%, 11/15/29 79,325 8,735 Government National Mortgage Association I, 7.0%, 11/15/31 9,075 33,309 Government National Mortgage Association I, 7.0%, 12/15/30 34,366 41,446 Government National Mortgage Association I, 7.0%, 12/15/30 42,522 47,893 Government National Mortgage Association I, 7.0%, 12/15/30 57,536 27,246 Government National Mortgage Association I, 7.0%, 2/15/28 30,465 27,154 Government National Mortgage Association I, 7.0%, 3/15/28 30,298 58,941 Government National Mortgage Association I, 7.0%, 3/15/32 66,704 33,575 Government National Mortgage Association I, 7.0%, 4/15/28 37,477 The accompanying notes are an integral part of these financial statements. Pioneer Government Income Fund | Annual Report | 7/31/15 23 Schedule of Investments | 7/31/15 (continued) ------------------------------------------------------------------------------------------ Floating Principal Rate (b) Amount ($) (unaudited) Value ------------------------------------------------------------------------------------------ U.S. GOVERNMENT AND AGENCY OBLIGATIONS -- (continued) 29,235 Government National Mortgage Association I, 7.0%, 4/15/29 $ 32,600 15,464 Government National Mortgage Association I, 7.0%, 4/15/31 16,623 48,422 Government National Mortgage Association I, 7.0%, 4/15/32 55,156 68,625 Government National Mortgage Association I, 7.0%, 5/15/29 76,744 8,705 Government National Mortgage Association I, 7.0%, 5/15/31 9,126 28,550 Government National Mortgage Association I, 7.0%, 6/15/27 33,623 5,202 Government National Mortgage Association I, 7.0%, 6/15/29 5,243 36,971 Government National Mortgage Association I, 7.0%, 7/15/25 42,469 6,575 Government National Mortgage Association I, 7.0%, 7/15/28 6,632 29,934 Government National Mortgage Association I, 7.0%, 7/15/28 33,955 16,247 Government National Mortgage Association I, 7.0%, 7/15/29 18,645 28,202 Government National Mortgage Association I, 7.0%, 8/15/23 31,083 83,283 Government National Mortgage Association I, 7.0%, 9/15/24 97,190 42,292 Government National Mortgage Association I, 7.0%, 9/15/31 47,797 44,604 Government National Mortgage Association I, 7.5%, 10/15/23 50,193 57,934 Government National Mortgage Association I, 7.5%, 10/15/27 67,250 13,906 Government National Mortgage Association I, 7.5%, 10/15/29 15,869 4,557 Government National Mortgage Association I, 7.5%, 12/15/25 4,750 24,471 Government National Mortgage Association I, 7.5%, 2/15/27 27,722 16,938 Government National Mortgage Association I, 7.5%, 2/15/31 17,699 10,370 Government National Mortgage Association I, 7.5%, 3/15/23 11,365 44,616 Government National Mortgage Association I, 7.5%, 3/15/27 54,218 7,955 Government National Mortgage Association I, 7.5%, 3/15/31 8,314 The accompanying notes are an integral part of these financial statements. 24 Pioneer Government Income Fund | Annual Report | 7/31/15 ------------------------------------------------------------------------------------------ Floating Principal Rate (b) Amount ($) (unaudited) Value ------------------------------------------------------------------------------------------ U.S. GOVERNMENT AND AGENCY OBLIGATIONS -- (continued) 27,577 Government National Mortgage Association I, 7.5%, 4/15/23 $ 27,960 1,753 Government National Mortgage Association I, 7.5%, 6/15/24 1,825 17,697 Government National Mortgage Association I, 7.5%, 6/15/29 20,257 11,510 Government National Mortgage Association I, 7.5%, 8/15/25 11,858 1,142 Government National Mortgage Association I, 7.5%, 8/15/29 1,156 2,996 Government National Mortgage Association I, 7.5%, 8/15/29 3,081 6,952 Government National Mortgage Association I, 7.5%, 9/15/25 7,855 3,889 Government National Mortgage Association I, 7.5%, 9/15/25 3,903 66,938 Government National Mortgage Association I, 7.5%, 9/15/29 70,230 38,264 Government National Mortgage Association I, 8.25%, 5/15/20 41,897 2,126 Government National Mortgage Association I, 8.5%, 8/15/21 2,136 9,510 Government National Mortgage Association I, 9.0%, 1/15/20 9,715 1,289 Government National Mortgage Association I, 9.0%, 12/15/19 1,409 2,303 Government National Mortgage Association I, 9.0%, 6/15/22 2,416 292 Government National Mortgage Association I, 9.0%, 9/15/21 323 188,396 Government National Mortgage Association II, 4.0%, 10/20/44 200,172 36,906 Government National Mortgage Association II, 5.0%, 1/20/20 39,452 101,036 Government National Mortgage Association II, 5.0%, 12/20/18 107,172 69,135 Government National Mortgage Association II, 5.0%, 2/20/19 73,325 236,588 Government National Mortgage Association II, 5.5%, 10/20/37 265,556 68,482 Government National Mortgage Association II, 5.75%, 4/20/33 76,740 155,867 Government National Mortgage Association II, 5.75%, 6/20/33 174,652 29,210 Government National Mortgage Association II, 5.9%, 1/20/28 32,787 The accompanying notes are an integral part of these financial statements. Pioneer Government Income Fund | Annual Report | 7/31/15 25 Schedule of Investments | 7/31/15 (continued) ------------------------------------------------------------------------------------------ Floating Principal Rate (b) Amount ($) (unaudited) Value ------------------------------------------------------------------------------------------ U.S. GOVERNMENT AND AGENCY OBLIGATIONS -- (continued) 57,749 Government National Mortgage Association II, 5.9%, 11/20/27 $ 64,269 109,569 Government National Mortgage Association II, 5.9%, 7/20/28 120,922 119,846 Government National Mortgage Association II, 6.0%, 1/20/33 138,177 29,103 Government National Mortgage Association II, 6.0%, 10/20/31 33,218 138,645 Government National Mortgage Association II, 6.0%, 10/20/33 159,514 44,823 Government National Mortgage Association II, 6.0%, 12/20/18 46,616 79,999 Government National Mortgage Association II, 6.0%, 6/20/34 91,713 10,766 Government National Mortgage Association II, 6.0%, 7/20/17 11,070 25,495 Government National Mortgage Association II, 6.0%, 7/20/19 26,671 90,744 Government National Mortgage Association II, 6.45%, 1/20/33 103,538 49,179 Government National Mortgage Association II, 6.45%, 11/20/32 56,096 51,209 Government National Mortgage Association II, 6.45%, 7/20/32 58,414 33,173 Government National Mortgage Association II, 6.5%, 1/20/24 37,884 56,375 Government National Mortgage Association II, 6.5%, 10/20/32 67,889 70,519 Government National Mortgage Association II, 6.5%, 3/20/34 85,389 17,833 Government National Mortgage Association II, 6.5%, 4/20/31 21,240 12,979 Government National Mortgage Association II, 6.5%, 6/20/31 15,293 61,224 Government National Mortgage Association II, 6.5%, 8/20/28 71,987 14,519 Government National Mortgage Association II, 7.0%, 1/20/31 17,708 13,255 Government National Mortgage Association II, 7.0%, 11/20/31 15,974 9,634 Government National Mortgage Association II, 7.0%, 2/20/29 11,633 6,896 Government National Mortgage Association II, 7.0%, 3/20/31 8,430 13,190 Government National Mortgage Association II, 7.0%, 5/20/26 15,458 The accompanying notes are an integral part of these financial statements. 26 Pioneer Government Income Fund | Annual Report | 7/31/15 ------------------------------------------------------------------------------------------ Floating Principal Rate (b) Amount ($) (unaudited) Value ------------------------------------------------------------------------------------------ U.S. GOVERNMENT AND AGENCY OBLIGATIONS -- (continued) 27,436 Government National Mortgage Association II, 7.0%, 6/20/28 $ 32,862 32,938 Government National Mortgage Association II, 7.0%, 7/20/31 40,304 26,138 Government National Mortgage Association II, 7.0%, 8/20/27 30,928 8,379 Government National Mortgage Association II, 7.5%, 12/20/30 10,414 13,766 Government National Mortgage Association II, 7.5%, 5/20/30 15,795 4,584 Government National Mortgage Association II, 7.5%, 6/20/30 5,694 14,171 Government National Mortgage Association II, 7.5%, 7/20/30 17,519 14,727 Government National Mortgage Association II, 7.5%, 8/20/30 18,310 11,819 Government National Mortgage Association II, 8.0%, 3/20/30 14,879 28,674 Government National Mortgage Association II, 8.0%, 4/20/30 36,132 56 Government National Mortgage Association II, 8.0%, 5/20/25 63 15,349 Government National Mortgage Association II, 8.0%, 5/20/30 19,306 18,023 Government National Mortgage Association II, 8.0%, 6/20/30 22,770 2,783 Government National Mortgage Association II, 9.0%, 11/20/24 2,796 2,879 Government National Mortgage Association II, 9.0%, 3/20/22 2,878 406 Government National Mortgage Association II, 9.0%, 4/20/22 406 1,610 Government National Mortgage Association II, 9.0%, 9/20/21 1,768 600,000 Private Export Funding Corp., 2.25%, 12/15/17 615,118 1,300,000 Private Export Funding Corp., 2.8%, 5/15/22 1,323,912 3,420,000 Private Export Funding Corp., 4.3%, 12/15/21 3,838,256 3,000,000 Private Export Funding Corp., 4.375%, 3/15/19 3,308,061 1,655,000 Private Export Funding Corp., 5.45%, 9/15/17 1,809,327 1,118,085 Tennessee Valley Authority, 4.929%, 1/15/21 1,234,247 800,000 Tennessee Valley Authority, 5.5%, 6/15/38 1,021,658 1,500,000 U.S. Treasury Bonds, 3.0%, 5/15/42 1,522,500 2,500,000 U.S. Treasury Bonds, 4.25%, 5/15/39 3,114,648 1,650,000 U.S. Treasury Bonds, 4.5%, 5/15/38 2,130,434 The accompanying notes are an integral part of these financial statements. Pioneer Government Income Fund | Annual Report | 7/31/15 27 Schedule of Investments | 7/31/15 (continued) ------------------------------------------------------------------------------------------ Floating Principal Rate (b) Amount ($) (unaudited) Value ------------------------------------------------------------------------------------------ U.S. GOVERNMENT AND AGENCY OBLIGATIONS -- (continued) 2,503,775 U.S. Treasury Inflation Indexed Bonds, 0.125%, 7/15/24 $ 2,431,596 465,000 0.12 U.S. Treasury Note, Floating Rate Note, 7/31/16 465,094 3,000,000 U.S. Treasury Notes, 0.625%, 5/31/17 2,998,827 5,200,000 U.S. Treasury Notes, 1.875%, 8/31/17 5,324,706 3,500,000 U.S. Treasury Notes, 2.625%, 11/15/20 3,669,533 ------------------------------------------------------------------------------------------ TOTAL U.S. GOVERNMENT AND AGENCY OBLIGATIONS (Cost $75,195,130) $ 78,257,440 ------------------------------------------------------------------------------------------ FOREIGN GOVERNMENT BONDS -- 5.8% 3,000,000 Israel Government AID Bond, 5.5%, 4/26/24 $ 3,676,848 2,000,000 Israel Government AID Bond, 5.5%, 9/18/23 2,436,186 ------------------------------------------------------------------------------------------ TOTAL FOREIGN GOVERNMENT BONDS (Cost $5,856,680) $ 6,113,034 ------------------------------------------------------------------------------------------ MUNICIPAL BONDS -- 0.6% (d) Municipal General -- 0.3% 125,000 Virginia Commonwealth Transportation Board, 4.0%, 5/15/31 $ 131,624 125,000 Virginia Commonwealth Transportation Board, 4.0%, 5/15/32 131,136 ------------- $ 262,760 ------------------------------------------------------------------------------------------ Higher Municipal Education -- 0.1% 100,000 New Jersey Educational Facilities Authority, 4.0%, 7/1/45 $ 104,242 ------------------------------------------------------------------------------------------ Municipal School District -- 0.1% 100,000 Frisco Independent School District, 4.0%, 8/15/40 (e) $ 101,988 50,000 Frisco Independent School District, 4.0%, 8/15/45 (e) 50,793 ------------- $ 257,023 ------------------------------------------------------------------------------------------ Municipal Obligation -- 0.1% 150,000 State of Texas, 4.0%, 10/1/44 (e) $ 154,881 ------------------------------------------------------------------------------------------ TOTAL MUNICIPAL BONDS (Cost $671,430) $ 674,664 ------------------------------------------------------------------------------------------ TOTAL INVESTMENT IN SECURITIES -- 98.7% (Cost $100,267,176) (a) $ 104,369,439 ------------------------------------------------------------------------------------------ OTHER ASSETS & LIABILITIES -- 1.3% $ 1,421,190 ------------------------------------------------------------------------------------------ TOTAL NET ASSETS -- 100.0% $ 105,790,629 ========================================================================================== The accompanying notes are an integral part of these financial statements. 28 Pioneer Government Income Fund | Annual Report | 7/31/15 (144A) Security is exempt from registration under Rule 144A of the Securities Act of 1933. Such securities may be resold normally to qualified institutional buyers in a transaction exempt from registration. At July 31, 2015, the value of these securities amounted to $1,570,473 or 1.5% of total net assets. REMICS Real estate mortgage investment conduits. (a) At July 31, 2015, the net unrealized appreciation on investments based on cost for federal income tax purposes of $100,483,012 was as follows: Aggregate gross unrealized appreciation for all investments in which there is an excess of value over tax cost $4,341,580 Aggregate gross unrealized depreciation for all investments in which there is an excess of tax cost over value (455,153) ---------- Net unrealized appreciation $3,886,427 ========== (b) Debt obligation with a variable interest rate. Rate shown is rate at end of period. (c) Security issued with a zero coupon. Income is recognized through accretion of discount. (d) Consists of Revenue Bonds unless otherwise indicated. (e) Represents a General Obligation Bond. Purchases and sales of securities (excluding temporary cash investments) for the year ended July 31, 2015 aggregated $29,682,955 and $39,112,663, 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. See Notes to Financial Statements -- Note 1A. The following is a summary of the inputs used as of July 31, 2015, in valuing the Fund's assets: --------------------------------------------------------------------------------------------- Level 1 Level 2 Level 3 Total --------------------------------------------------------------------------------------------- Asset Backed Securities $ -- $ 4,348,856 $ -- $ 4,348,856 Collateralized Mortgage Obligations -- 14,474,958 -- 14,474,958 Corporate Bonds -- 500,487 -- 500,487 U.S. Government and Agency Obligations -- 78,257,440 -- 78,257,440 Foreign Government Bonds -- 6,113,034 -- 6,113,034 Municipal Bonds -- 674,664 -- 674,664 --------------------------------------------------------------------------------------------- Total $ -- $104,369,439 $ -- $104,369,439 ============================================================================================= Other Financial Instruments Net unrealized appreciation on futures contracts $86,203 $ -- $ -- $ 86,203 --------------------------------------------------------------------------------------------- Total Other Financial Instruments $86,203 $ -- $ -- $ 86,203 ============================================================================================= During the year ended July 31, 2015, there were no transfers between Levels 1, 2 and 3. The accompanying notes are an integral part of these financial statements. Pioneer Government Income Fund | Annual Report | 7/31/15 29 Schedule of Investments | 7/31/15 (continued) The following is a summary of the fair valuation of certain Fund's assets and liabilities as of July 31, 2015. --------------------------------------------------------------------------------------------- Level 1 Level 2 Level 3 Total --------------------------------------------------------------------------------------------- Assets: Futures collateral $ -- $286,270 $ -- $286,270 Liabilities: Variation margin for futures contracts (52,687) -- -- (52,687) --------------------------------------------------------------------------------------------- Total $(52,687) $286,270 $ -- $233,583 ============================================================================================= The accompanying notes are an integral part of these financial statements. 30 Pioneer Government Income Fund | Annual Report | 7/31/15 Statement of Assets and Liabilities | 7/31/15 ASSETS: Investment in securities (cost $100,267,176) $104,369,439 Cash 704,686 Futures collateral 286,270 Receivables -- Fund shares sold 32,367 Interest 587,583 Net unrealized appreciation on futures contracts 86,203 Other assets 66,986 ------------------------------------------------------------------------------------------ Total assets $106,133,534 ========================================================================================== LIABILITIES: Payables -- Fund shares repurchased $ 137,975 Trustee fees 706 Variation margin 52,687 Due to affiliates 44,975 Accrued expenses 106,562 ------------------------------------------------------------------------------------------ Total liabilities $ 342,905 ========================================================================================== NET ASSETS: Paid-in capital $111,355,402 Distributions in excess of net investment income (176,497) Accumulated net realized loss on investments and futures contracts (9,576,742) Net unrealized appreciation on investments 4,102,263 Net unrealized appreciation on futures contracts 86,203 ------------------------------------------------------------------------------------------ Total net assets $105,790,629 ========================================================================================== NET ASSET VALUE PER SHARE: (No par value, unlimited number of shares authorized) Class A (based on $89,273,118/9,508,510 shares) $ 9.39 Class C (based on $12,043,067/1,282,279 shares) $ 9.39 Class Y (based on $4,474,444/476,122 shares) $ 9.40 MAXIMUM OFFERING PRICE: Class A ($9.39 (divided by) 95.5%) $ 9.83 ========================================================================================== The accompanying notes are an integral part of these financial statements. Pioneer Government Income Fund | Annual Report | 7/31/15 31 Statement of Operations For the Year Ended 7/31/15 INVESTMENT INCOME: Interest $3,431,064 --------------------------------------------------------------------------------------------- Total investment income $3,431,064 --------------------------------------------------------------------------------------------- EXPENSES: Management fees $ 556,947 Transfer agent fees and expenses Class A 134,438 Class B* 4,455 Class C 12,662 Class Y 738 Distribution fees Class A 230,421 Class B* 6,385 Class C 134,482 Shareholder communications expense 143,706 Administrative reimbursement 48,479 Custodian fees 40,255 Registration fees 61,375 Professional fees 67,777 Printing expense 31,599 Fees and expenses of nonaffiliated Trustees 6,796 Pricing fees 41,661 Miscellaneous 39,762 --------------------------------------------------------------------------------------------- Total expenses $1,561,938 ============================================================================================= Net investment income $1,869,126 --------------------------------------------------------------------------------------------- REALIZED AND UNREALIZED GAIN (LOSS) ON INVESTMENTS AND FUTURES CONTRACTS: Net realized gain (loss) on: Investments $ 209,984 Futures contracts (672,887) $ (462,903) --------------------------------------------------------------------------------------------- Change in net unrealized appreciation (depreciation) on: Investments $ 519,863 Futures contracts (21,313) $ 498,550 --------------------------------------------------------------------------------------------- Net gain on investments and futures contracts $ 35,647 --------------------------------------------------------------------------------------------- Net increase in net assets resulting from operations $1,904,773 ============================================================================================= * Class B shares converted to Class A shares on November 10, 2014. The accompanying notes are an integral part of these financial statements. 32 Pioneer Government Income Fund | Annual Report | 7/31/15 Statements of Changes in Net Assets -------------------------------------------------------------------------------------------- Year Ended Year Ended 7/31/15 7/31/14 -------------------------------------------------------------------------------------------- FROM OPERATIONS: Net investment income $ 1,869,126 $ 3,357,783 Net realized loss on investments and futures contracts (462,903) (4,775,069) Change in net unrealized appreciation (depreciation) on investments and futures contracts 498,550 3,858,890 -------------------------------------------------------------------------------------------- Net increase in net assets resulting from operations $ 1,904,773 $ 2,441,604 -------------------------------------------------------------------------------------------- DISTRIBUTIONS TO SHAREOWNERS: Net investment income: Class A ($0.20 and $0.44 per share, respectively) $ (1,974,181) $ (4,602,730) Class B* ($0.03 and $0.34 per share, respectively) (6,643) (107,545) Class C ($0.13 and $0.38 per share, respectively) (189,668) (623,375) Class Y ($0.23 and $0.48 per share, respectively) (127,229) (523,818) -------------------------------------------------------------------------------------------- Total distributions to shareowners $ (2,297,721) $ (5,857,468) -------------------------------------------------------------------------------------------- FROM FUND SHARE TRANSACTIONS: Net proceeds from sale or exchange of shares $ 23,282,963 $ 19,165,020 Reinvestment of distributions 2,212,993 4,972,391 Cost of shares repurchased (36,408,126) (49,877,652) -------------------------------------------------------------------------------------------- Net decrease in net assets resulting from Fund share transactions $ (10,912,170) $(25,740,241) -------------------------------------------------------------------------------------------- Net decrease in net assets $ (11,305,118) $(29,156,105) NET ASSETS: Beginning of year 117,095,747 146,251,852 -------------------------------------------------------------------------------------------- End of year $ 105,790,629 $117,095,747 -------------------------------------------------------------------------------------------- Distributions in excess of net investment income $ (176,497) $ (379,204) ============================================================================================ * Class B shares converted to Class A shares on November 10, 2014. The accompanying notes are an integral part of these financial statements. Pioneer Government Income Fund | Annual Report | 7/31/15 33 Statements of Changes in Net Assets (continued) ------------------------------------------------------------------------------------------------ ' 15 Shares '15 Amount '14 Shares '14 Amount ------------------------------------------------------------------------------------------------ Class A Shares sold 1,885,188 $ 17,800,006 1,314,683 $ 12,471,203 Reinvestment of distributions 206,177 1,947,677 424,193 4,016,128 Less shares repurchased (2,231,395) (21,057,191) (3,363,699) (32,033,970) ------------------------------------------------------------------------------------------------ Net decrease (140,030) $ (1,309,508) (1,624,823) $(15,546,639) ================================================================================================ Class B* Shares sold or exchanged 81 $ 2,319 1,307 $ 13,715 Reinvestment of distributions 797 6,643 10,129 95,816 Less shares repurchased (251,008) (2,362,723) (165,758) (1,579,633) ------------------------------------------------------------------------------------------------ Net decrease (250,130) $ (2,353,761) (154,322) $ (1,470,102) ================================================================================================ Class C Shares sold 396,429 $ 3,747,195 223,502 $ 2,128,412 Reinvestment of distributions 13,912 131,444 40,663 384,816 Less shares repurchased (569,714) (5,384,080) (809,347) (7,710,044) ------------------------------------------------------------------------------------------------ Net decrease (159,373) $ (1,505,441) (545,182) $ (5,196,816) ================================================================================================ Class Y Shares sold 182,373 $ 1,733,443 479,348 $ 4,551,690 Reinvestment of distributions 14,620 127,229 50,177 475,631 Less shares repurchased (804,736) (7,604,132) (897,536) (8,554,005) ------------------------------------------------------------------------------------------------ Net decrease (607,743) $ (5,743,460) (368,011) $ (3,526,684) ================================================================================================ * Class B shares converted to Class A shares on November 10, 2014. The accompanying notes are an integral part of these financial statements. 34 Pioneer Government Income Fund | Annual Report | 7/31/15 Financial Highlights ------------------------------------------------------------------------------------------------------------------ Year Year Year Year Year Ended Ended Ended Ended Ended 7/31/15 7/31/14 7/31/13 7/31/12 7/31/11 ------------------------------------------------------------------------------------------------------------------ Class A Net asset value, beginning of period $ 9.42 $ 9.67 $ 10.33 $ 10.07 $ 10.15 ------------------------------------------------------------------------------------------------------------------ Increase (decrease) from investment operations: Net investment income (loss) $ 0.16 $ 0.26 $ 0.38 $ 0.27 $ 0.32 Net realized and unrealized gain (loss) on investments 0.01 (0.07) (0.69) 0.33 (0.03) ------------------------------------------------------------------------------------------------------------------ Net increase (decrease) from investment operations $ 0.17 $ 0.19 $ (0.31) $ 0.60 $ 0.29 ------------------------------------------------------------------------------------------------------------------ Distribution to shareowners: Net investment income $ (0.20) $ (0.44) $ (0.35) $ (0.34) $ (0.37) ------------------------------------------------------------------------------------------------------------------ Net increase (decrease) in net asset value $ (0.03) $ (0.25) $ (0.66) $ 0.26 $ (0.08) ------------------------------------------------------------------------------------------------------------------ Net asset value, end of period $ 9.39 $ 9.42 $ 9.67 $ 10.33 $ 10.07 =================================================================================================================== Total return* 1.83% 2.07% (3.04)% 6.03% 2.95% Ratio of net expenses to average net assets 1.33% 1.28% 1.22% 1.14% 1.17% Ratio of net investment income (loss) to average net assets 1.75% 2.70% 3.72% 2.57% 3.29% Portfolio turnover rate 27% 16% 19% 67% 19% Net assets, end of period (in thousands) $89,273 $90,932 $109,054 $152,020 $131,758 =================================================================================================================== * Assumes initial investment at net asset value at the beginning of each period, reinvestment of all distributions, the complete redemption of the investment at net asset value at the end of each period and no sales charges. Total return would be reduced if sales charges were taken into account. The accompanying notes are an integral part of these financial statements. Pioneer Government Income Fund | Annual Report | 7/31/15 35 Financial Highlights (continued) ---------------------------------------------------------------------------------------------------------------- Year Year Year Year Year Ended Ended Ended Ended Ended 7/31/15 7/31/14 7/31/13 7/31/12 7/31/11 ---------------------------------------------------------------------------------------------------------------- Class C Net asset value, beginning of period $ 9.42 $ 9.68 $ 10.34 $ 10.08 $ 10.15 ---------------------------------------------------------------------------------------------------------------- Increase (decrease) from investment operations: Net investment income (loss) $ 0.10 $ 0.20 $ 0.32 $ 0.22 $ 0.25 Net realized and unrealized gain (loss) on investments 0.00(a) (0.08) (0.69) 0.31 (0.02) ---------------------------------------------------------------------------------------------------------------- Net increase (decrease) from investment operations $ 0.10 $ 0.12 $ (0.37) $ 0.53 $ 0.23 ---------------------------------------------------------------------------------------------------------------- Distribution to shareowners: Net investment income $ (0.13) $ (0.38) $ (0.29) $ (0.27) $ (0.30) ---------------------------------------------------------------------------------------------------------------- Net increase (decrease) in net asset value $ (0.03) $ (0.26) $ (0.66) $ 0.26 $ (0.07) ---------------------------------------------------------------------------------------------------------------- Net asset value, end of period $ 9.39 $ 9.42 $ 9.68 $ 10.34 $ 10.08 ================================================================================================================ Total return* 1.09% 1.24% (3.68)% 5.29% 2.32% Ratio of net expenses to average net assets 2.02% 2.02% 1.90% 1.83% 1.87% Ratio of net investment income (loss) to average net assets 1.06% 1.98% 3.10% 1.73% 2.61% Portfolio turnover rate 27% 16% 19% 67% 19% Net assets, end of period (in thousands) $12,043 $13,586 $19,225 $50,230 $26,113 ================================================================================================================ * 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) Amount rounds to less than $0.01 or $(0.01) per share. The accompanying notes are an integral part of these financial statements. 36 Pioneer Government Income Fund | Annual Report | 7/31/15 ------------------------------------------------------------------------------------------------------------------ Year Year Year Year Year Ended Ended Ended Ended Ended 7/31/15 7/31/14 7/31/13 7/31/12 7/31/11 ------------------------------------------------------------------------------------------------------------------ Class Y Net asset value, beginning of period $ 9.43 $ 9.68 $ 10.34 $ 10.07 $ 10.16 ------------------------------------------------------------------------------------------------------------------ Increase (decrease) from investment operations: Net investment income (loss) $ 0.16 $ 0.33 $ 0.39 $ 0.33 $ 0.36 Net realized and unrealized gain (loss) on investments 0.04 (0.10) (0.65) 0.32 (0.03) ------------------------------------------------------------------------------------------------------------------ Net increase (decrease) from investment operations $ 0.20 $ 0.23 $ (0.26) $ 0.65 $ 0.33 ------------------------------------------------------------------------------------------------------------------ Distribution to shareowners: Net investment income $ (0.23) $ (0.48) $ (0.40) $ (0.38) $ (0.42) ------------------------------------------------------------------------------------------------------------------ Net increase (decrease) in net asset value $ (0.03) $ (0.25) $ (0.66) $ 0.27 $ (0.09) ------------------------------------------------------------------------------------------------------------------ Net asset value, end of period $ 9.40 $ 9.43 $ 9.68 $ 10.34 $ 10.07 ================================================================================================================== Total return* 2.17% 2.48% (2.65)% 6.56% 3.32% Ratio of net expenses to average net assets 0.96% 0.92% 0.85% 0.74% 0.69% Ratio of net investment income (loss) to average net assets 2.11% 3.03% 3.80% 2.83% 3.85% Portfolio turnover rate 27% 16% 19% 67% 19% Net assets, end of period (in thousands) $ 4,474 $10,219 $14,057 $13,092 $ 6,496 ================================================================================================================== * Assumes initial investment at net asset value at the beginning of each period, reinvestment of all distributions, the complete redemption of the investment at net asset value at the end of each period and no sales charges. Total return would be reduced if sales charges were taken into account. The accompanying notes are an integral part of these financial statements. Pioneer Government Income Fund | Annual Report | 7/31/15 37 Notes to Financial Statements | 7/31/15 1. Organization and Significant Accounting Policies Pioneer Government Income Fund (the Fund) is one of three portfolios comprising Pioneer Series Trust IV, a Delaware statutory trust. The Fund is registered under the Investment Company Act of 1940 as a diversified, open-end management investment company. The Fund's investment objective is to seek current income as is consistent with preservation of capital. The Fund offers three classes of shares designated as Class A, Class C and Class Y shares. Class C shares were first publicly offered on September 23, 2005. 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 of Trustees the flexibility to specify either per-share voting or dollar-weighted voting when submitting matters for shareholder approval. Under per-share voting, each share of a class of the Fund is entitled to one vote. Under dollar-weighted voting, a shareholder's voting power is determined not by the number of shares owned but by the dollar value of the shares on the record date. Each share class has exclusive voting rights with respect to matters affecting only that class, including with respect to the distribution plan for that class. There is no distribution plan for Class Y shares. The Fund's financial statements have been prepared in conformity with U.S. generally accepted accounting principles that require the management of the Fund to, among other things, make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of income, expenses and gains and losses on investments during the reporting period. Actual results could differ from those estimates. The following is a summary of significant accounting policies followed by the Fund in the preparation of its financial statements. 38 Pioneer Government Income Fund | Annual Report | 7/31/15 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. Fixed income securities are valued at prices supplied by independent pricing services, which consider such factors as market prices, market events, quotations from one or more brokers, Treasury spreads, yields, maturities and ratings. Valuations may be supplemented by dealers and other sources, as required. Shares of money market mutual funds are valued at such funds' net asset value. Cash may include overnight time deposits at approved financial institutions. 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 July 31, 2015, there were no securities that were valued using fair value methods (other than securities valued using prices supplied by independent pricing services or broker-dealers). Pioneer Government Income Fund | Annual Report | 7/31/15 39 B. Investment Income and Transactions Principal amounts of mortgage-backed securities are adjusted for monthly paydowns. Premiums and discounts related to certain mortgage-backed securities are amortized or accreted in proportion to the monthly paydowns. All discounts/premiums on purchase prices of debt securities are accreted/amortized for financial reporting purposes over the life of the respective securities, and such accretion/amortization is included in interest income. Interest income, including interest on income bearing cash accounts, is recorded on the accrual basis. Gains and losses on sales of investments are calculated on the identified cost method for both financial reporting and federal income tax purposes. C. Federal Income Taxes It is the Fund's policy to comply with the requirements of the Internal Revenue Code applicable to regulated investment companies and to distribute all of its taxable income and net realized capital gains, if any, to its shareowners. Therefore, no provision for federal income taxes is required. As of July 31, 2015, 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 July 31, 2015, the Fund reclassified $2,465,526 to decrease paid in capital, $631,302 to decrease undistributed net investment loss, and $1,834,224 to decrease accumulated net realized loss on investments and future contracts to reflect permanent book/tax differences. These adjustments have no impact on net assets or the results of operations. 40 Pioneer Government Income Fund | Annual Report | 7/31/15 At July 31, 2015, the Fund was permitted to carry forward indefinitely $844,011 of short-term losses and $5,845,546 of long-term losses under the Regulated Investment Company Modernization Act of 2010 without limitation. Additionally, at July 31, 2015, the Fund had a net capital loss carryforward of $2,793,238 of which the amount will expire in 2016 if not utilized. During the year ended July 31, 2015, a capital loss carryforward of $2,465,526 was utilized to offset net realized gains by the fund. The tax character of distributions paid during the year ended July 31, 2015 and July 31, 2014 was as follows: -------------------------------------------------------------------------------- 2015 2014 -------------------------------------------------------------------------------- Distributions paid from: Ordinary income $2,297,721 $5,857,468 -------------------------------------------------------------------------------- Total $2,297,721 $5,857,468 ================================================================================ The following shows the components of distributable earnings on a federal income tax basis at July 31, 2015: -------------------------------------------------------------------------------- 2015 -------------------------------------------------------------------------------- Distributable earnings: Undistributed ordinary income $ 31,595 Capital loss carryforward (9,482,795) Net unrealized appreciation 3,886,427 -------------------------------------------------------------------------------- Total $ (5,564,773) ================================================================================ The difference between book-basis and tax-basis net unrealized appreciation is attributable to the tax deferral of losses on wash sales, the tax treatment of premium and amortization and the mark-to-market on futures contracts. D. 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 $5,552 in underwriting commissions on the sale of Class A shares during the year ended July 31, 2015. E. Class Allocations Income, common expenses and realized and unrealized gains and losses are calculated at the Fund level and allocated daily to each class of shares based on its respective percentage of adjusted net assets at the beginning of the day. Pioneer Government Income Fund | Annual Report | 7/31/15 41 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. F. Risks The Fund may invest in mortgage-backed securities, which during times of fluctuating interest rates may increase or decrease more than other fixed- income securities. Mortgage-backed securities are also subject to prepayments. 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. G. 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 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 July 31, 2015, the Fund had no open repurchase agreements. H. Futures Contracts The Fund may enter into futures transactions in order to attempt to hedge against changes in interest rates, securities prices and currency rates or to seek to increase total return. Futures contracts are types of derivatives. All futures contracts entered into by the Fund are traded on a futures exchange. Upon entering into a futures contract, the Fund is required to deposit with a broker an amount of cash or securities equal to the minimum "initial margin" requirements of the associated futures exchange. The amount of cash deposited with the broker as collateral at July 31, 2015 was $286,270. Subsequent payments for futures contracts ("variation margin") are paid or 42 Pioneer Government Income Fund | Annual Report | 7/31/15 received by the Fund, depending on the daily fluctuation in the value of the contracts, and are recorded by the Fund as unrealized appreciation or depreciation. When the contract is closed, the Fund realizes a gain or loss equal to the difference between the opening and closing value of the contract. The use of futures contracts involves, to varying degrees, elements of market, interest rate, currency exchange rates and counterparty risks, which may exceed the amounts recognized by the Fund. Changes in value of the contracts may not directly correlate to the changes in value of the underlying securities. The average value of contracts open for the year ended July 31, 2015 was $(9,931,887). At July 31, 2015, open futures contracts were as follows. ----------------------------------------------------------------------------------------- Number of Unrealized Contracts Settlement Appreciation/ Type Long/(Short) Month/Year Value (Depreciation) ----------------------------------------------------------------------------------------- US Long Bond (CBT) (71) 9/15 $ (11,071,563) $ (118,703) US 10 Year Note (CBT) (47) 9/15 (5,989,562) (15,422) US 5 Year Note (CBT) (10) 9/15 (1,198,437) (5,703) US 2 Year Note (CBT) 17 9/15 3,724,062 8,500 US Ultra Bond (CBT) 46 9/15 7,338,437 217,531 ----------------------------------------------------------------------------------------- Total $ (7,197,063) $ 86,203 ----------------------------------------------------------------------------------------- 2. Management Agreement PIM, a wholly owned indirect subsidiary of UniCredit, manages the Fund's portfolio. Management fees are calculated daily at the annual rate of 0.50% of the Fund's average daily net assets up to $1 billion and 0.45% on assets over $1 billion. For the year ended July 31, 2015, the effective management fee (excluding waivers and/or assumption of expenses) was equivalent to 0.50% of the Fund's average daily net assets. In addition, under the management and administration agreements, certain other services and costs, including accounting, regulatory reporting and insurance premiums, are paid by the Fund as administrative reimbursements. Included in "Due to affiliates" reflected on the Statement of Assets and Liabilities is $3,027 in management fees, administrative costs and certain other reimbursements payable to PIM at July 31, 2015. 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. Pioneer Government Income Fund | Annual Report | 7/31/15 43 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. For the year ended July 31, 2015, such out-of-pocket expenses by class of shares were as follows: -------------------------------------------------------------------------------- Shareholder Communications: -------------------------------------------------------------------------------- Class A $117,709 Class B 2,278 Class C 16,332 Class Y 7,387 -------------------------------------------------------------------------------- Total $143,706 ================================================================================ Included in "Due to affiliates" reflected on the Statement of Assets and Liabilities is $40,059 in transfer agent fees and out-of-pocket reimbursements payable to PIMSS at July 31, 2015. 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 $1,889 in distribution fees payable to PFD at July 31, 2015. In addition, redemptions of each class of shares (except Class Y shares) may be subject to a contingent deferred sales charge (CDSC). A CDSC of 1.00% may be imposed on redemptions of certain net asset value purchases of Class A shares within 12 months of purchase. Redemptions of Class C shares within 12 months of purchase are subject to a CDSC of 1.00%, based on the lower of cost or market value of shares being redeemed. Shares purchased as part of an exchange remain subject to any CDSC that applied to the original purchase of those shares. There is no CDSC for Class Y shares. Proceeds from the CDSCs are paid to PFD. For the year ended July 31, 2015, CDSCs in the amount of $1,571 were paid to PFD. 44 Pioneer Government Income Fund | Annual Report | 7/31/15 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 July 31, 2015, the Fund's expenses were not reduced under such arrangements. 6. Additional Disclosures about Derivative Instruments and Hedging Activities: Values of derivative instruments as of July 31, 2015 were as follows: ---------------------------------------------------------------------------------------------------- Derivatives Not Accounted for as Asset Derivatives Liabilities Derivatives Hedging Instruments --------------------------------------------------------------------- Under Accounting Statement of Value Statement of Value Standards Codification Assets and Liabilities Assets and Liabilities (ASC) 815 Location Location ---------------------------------------------------------------------------------------------------- Futures contracts Net unrealized Net unrealized appreciation on depreciation on futures contracts $86,203 futures contracts $ -- ---------------------------------------------------------------------------------------------------- Total $86,203 $ -- ==================================================================================================== The effect of derivative instruments on the Statement of Operations for the year ended July 31, 2015 was as follows: ---------------------------------------------------------------------------------------------------- Change in Derivatives Not Unrealized Accounted for as Realized Appreciation/ Hedging Instruments Gain/(Loss) (Depreciation) Under Accounting Location of Gain/(Loss) on Derivatives on Derivatives Standards Codification on Derivatives Recognized Recognized Recognized (ASC) 815 in Income in Income in Income ---------------------------------------------------------------------------------------------------- Futures contracts Net realized gain (loss) on futures contracts $(672,887) Futures contracts Change in net unrealized appreciation (depreciation) on futures contracts $(21,313) 7. Conversion of Class B Shares As of the close of business on November 10, 2014, all outstanding Class B shares of the Fund were converted to Class A shares. Pioneer Government Income Fund | Annual Report | 7/31/15 45 Report of Independent Registered Public Accounting Firm To the Board of Trustees of Pioneer Series Trust IV and the Shareowners of Pioneer Government Income Fund: -------------------------------------------------------------------------------- We have audited the accompanying statement of assets and liabilities of Pioneer Government Income Fund (the "Fund"), one of the portfolios constituting Pioneer Series Trust IV (the "Trust"), including the schedule of investments, as of July 31, 2015, and the related statement of operations for the year then ended and the statements of changes in net assets and the financial highlights for each of the two years in the period then ended. These financial statements and financial highlights are the responsibility of the Fund's management. Our responsibility is to express an opinion on these financial statements and financial highlights based on our audits. The financial highlights for the years ended July 31, 2013, 2012, and 2011 were audited by other auditors. Those auditors expressed an unqualified opinion on those financial statements and financial highlights in their report dated September 24, 2013. We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements and financial highlights are free of material misstatement. The Fund is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. Our audits included consideration of internal control over financial reporting as a basis for designing audit procedures that are appropriate in the circumstances, but not for the purpose of expressing an opinion on the effectiveness of the Fund's internal control over financial reporting. Accordingly, we express no such opinion. An audit also includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements, assessing the accounting principles used and significant estimates made by management, as well as evaluating the overall financial statement presentation. Our procedures included confirmation of securities owned as of July 31, 2015, by correspondence with the custodian, brokers and agent banks; where replies were not received from brokers and agent banks, we performed other auditing procedures. We believe that our audits 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 Government Income Fund as of July 31, 2015, the results of its operations for the year then ended, and the changes in its net assets and the financial highlights for each of the two years in the period then ended, in conformity with accounting principles generally accepted in the United States of America. /s/ Deloitte & Touche LLP Boston, Massachusetts September 24, 2015 46 Pioneer Government Income Fund | Annual Report | 7/31/15 ADDITIONAL INFORMATION (unaudited) The percentage of the Fund's ordinary income distributions that are exempt from nonresident alien (NRA) tax withholding resulting from qualified interest income was 92.1%. PIM, the Fund's investment adviser, is currently an indirect, wholly-owned subsidiary of UniCredit. On April 23, 2015, UniCredit announced that it signed a preliminary and exclusive agreement with Banco Santander and affiliates of Warburg Pincus and General Atlantic (the "Private Equity Firms") with respect to Pioneer Investments ("Pioneer") and Santander Asset Management ("SAM") (the "Transaction"). The Transaction, as described in the UniCredit announcement, will entail the establishment of a holding company, with the name Pioneer Investments, to be owned by UniCredit (50%) and the Private Equity Firms (50% between them). The holding company will control Pioneer's U.S. operations, including the Adviser. The holding company also will own 66.7% of Pioneer's and SAM's combined operations outside the U.S., while Banco Santander will own directly the remaining 33.3% stake. The completion of the Transaction is subject to the signing of a definitive agreement, as well as certain regulatory and corporate approvals, and other conditions. Under the Investment Company Act of 1940, completion of the Transaction will cause the Fund's investment advisory agreement with the Adviser to terminate. In connection with the Transaction, the Fund's Board of Trustees will be asked to approve a new investment advisory agreement for the Fund. If approved by the Board, the Fund's new investment advisory agreement will be submitted to the shareholders of the Fund for their approval. Pioneer Government Income Fund | Annual Report | 7/31/15 47 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 51 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. 48 Pioneer Government Income Fund | Annual Report | 7/31/15 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 Private investor (2004 - 2008 and 2013 - Director, Broadridge Financial Chairman of the Board and 2006. Serves until present); Chairman (2008 - 2013) and Chief Solutions, Inc. (investor Trustee a successor Executive Officer (2008 - 2012), Quadriserv, Inc. communications and securities trustee is elected (technology products for securities lending processing provider for or earlier industry); and Senior Executive Vice President, financial services industry) retirement or The Bank of New York (financial and securities (2009 - present); Director, removal. services) (1986 - 2004) Quadriserv, Inc. (2005 - 2013); and Commissioner, New Jersey State Civil Service Commission (2011 - present) ------------------------------------------------------------------------------------------------------------------------------------ David R. Bock (71) Trustee since Managing Partner, Federal City Capital Advisors Director of New York Mortgage Trustee 2005. Serves until (corporate advisory services company) (1997 - Trust(publicly-traded mortgage a successor 2004 and 2008 - present); Interim Chief Executive REIT) (2004 - 2009, 2012 - trustee is elected Officer, Oxford Analytica, Inc. (privately-held present); Director of The or earlier research and consulting company) (2010); Executive Swiss Helvetia Fund, Inc. retirement or Vice President and Chief Financial Officer, (closed-end fund) (2010 - removal. I-trax, Inc. (publicly traded health care present); Director of Oxford services company) (2004 - 2007); and Executive Analytica, Inc. (2008 - Vice President and Chief Financial Officer, present); and Director of Pedestal Inc. (internet-based mortgage trading Enterprise Community company) (2000 - 2002); Private consultant (1995 Investment, Inc. - 1997), Managing Director, (privately-held affordable Lehman Brothers (investment banking firm) (1992 - housing finance company) (1985 1995); and Executive, The World Bank (1979 - - 2010) 1992) ------------------------------------------------------------------------------------------------------------------------------------ Benjamin M. Friedman (70) Trustee since William Joseph Maier Professor of Political Trustee, Mellon Institutional Trustee 2008. Serves until Economy, Harvard University (1972 - present) Funds Investment Trust and a successor Mellon Institutional Funds trustee is elected Master Portfolio (oversaw 17 or earlier portfolios in fund complex) retirement or (1989-2008) removal. ------------------------------------------------------------------------------------------------------------------------------------ Pioneer Government Income Fund | Annual Report | 7/31/15 49 Independent Trustees (continued) ------------------------------------------------------------------------------------------------------------------------------------ Name, Age and Term of Office and Other Directorships Held by Position Held with the Fund Length of Service Principal Occupation Trustee ------------------------------------------------------------------------------------------------------------------------------------ Margaret B.W. Graham (68) Trustee since Founding Director, Vice President and Corporate None Trustee 2005. Serves until Secretary, The Winthrop Group, Inc. (consulting a successor firm) (1982 - present); Desautels Faculty of trustee is elected Management, McGill University (1999 - present); or earlier and Manager of Research Operations and retirement or Organizational Learning, Xerox PARC, Xerox's removal. advance research center (1990 - 1994) ------------------------------------------------------------------------------------------------------------------------------------ Marguerite A. Piret (67) Trustee since President and Chief Executive Officer, Newbury, Director of New America High Trustee 2005. Serves until Piret & Company, Inc. (investment banking firm) Income Fund, Inc. (closed-end a successor (1981 - present) investment company) (2004 - trustee is elected present); and Member, Board of or earlier Governors, Investment Company retirement or Institute (2000 - 2006) removal. ------------------------------------------------------------------------------------------------------------------------------------ Fred J. Ricciardi (68) Trustee since Consultant (investment company services) (2012 - None Trustee 2014. Serves until present); Executive Vice President, BNY Mellon a successor (financial and investment company services) (1969 trustee is elected -2012); Director, BNY International Financing or earlier Corp. (financial services) (2002 - 2012); and retirement or Director, Mellon Overseas Investment Corp. removal. (financial services) (2009 - 2012) ------------------------------------------------------------------------------------------------------------------------------------ 50 Pioneer Government Income Fund | Annual Report | 7/31/15 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 (57)* Trustee since 2014. Director and Executive Vice President (since 2008) and None Trustee Serves until a Chief Investment Officer, U.S. (since 2010) of PIM-USA; successor trustee is Executive Vice President of Pioneer (since 2008); elected or earlier Executive Vice President of Pioneer Institutional Asset retirement or Management, Inc. (since 2009); and Portfolio Manager of removal. 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 Government Income Fund | Annual Report | 7/31/15 51 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 (59)** Advisory Trustee Chief Investment Officer, 1199 SEIU Funds (healthcare None Advisory Trustee since 2014. 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. 52 Pioneer Government Income Fund | Annual Report | 7/31/15 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 (53) Since 2014. Serves at Chair, Director, CEO and President of Pioneer None President and Chief the discretion of the Investment Management-USA (since September 2014); Executive Officer Board. 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 2005. Serves at Vice President and Associate General Counsel of Pioneer None Secretary and Chief Legal the discretion of the since January 2008; Secretary and Chief Legal Officer of Officer Board. 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 (54) Since 2010. Serves at Fund Governance Director of Pioneer since December 2006 None Assistant Secretary the discretion of the and Assistant Secretary of all the Pioneer Funds since Board. 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 Senior Counsel of Pioneer since May 2013 and Assistant None Assistant Secretary the discretion of the Secretary of all the Pioneer Funds since June 2010; and Board. Counsel of Pioneer from June 2007 to May 2013 ------------------------------------------------------------------------------------------------------------------------------------ Mark E. Bradley (55) Since 2008. Serves at Vice President - Fund Treasury of Pioneer; Treasurer of None Treasurer and Chief the discretion of the all of the Pioneer Funds since March 2008; Deputy Financial and Accounting Board. Treasurer of Pioneer from March 2004 to February 2008; Officer and Assistant Treasurer of all of the Pioneer Funds from March 2004 to February 2008 ------------------------------------------------------------------------------------------------------------------------------------ Pioneer Government Income Fund | Annual Report | 7/31/15 53 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 (50) Since 2005. Serves at Director - Fund Treasury of Pioneer; and Assistant None Assistant Treasurer the discretion of the Treasurer of all of the Pioneer Funds Board. ------------------------------------------------------------------------------------------------------------------------------------ Gary Sullivan (57) Since 2005. Serves at Fund Accounting Manager - Fund Treasury of Pioneer; and None Assistant Treasurer the discretion of the Assistant Treasurer of all of the Pioneer Funds Board. ------------------------------------------------------------------------------------------------------------------------------------ David F. Johnson (35) Since 2009. Serves at Fund Administration Manager - Fund Treasury of Pioneer None Assistant Treasurer the discretion of the since November 2008; Assistant Treasurer of all of the Board. 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) Chief Since 2010. Serves at Chief Compliance Officer of Pioneer and of all the None Compliance Officer the discretion of the Pioneer Funds since March 2010; Chief Compliance Officer Board. 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 (44) Since 2006. Serves at Director - Transfer Agency Compliance of Pioneer and None Anti-Money Laundering the discretion of the Anti-Money Laundering Officer of all the Pioneer Funds Officer Board. since 2006 ------------------------------------------------------------------------------------------------------------------------------------ 54 Pioneer Government Income Fund | Annual Report | 7/31/15 This page for your notes. Pioneer Government Income Fund | Annual Report | 7/31/15 55 This page for your notes. 56 Pioneer Government Income Fund | Annual Report | 7/31/15 This page for your notes. Pioneer Government Income Fund | Annual Report | 7/31/15 57 This page for your notes. 58 Pioneer Government Income Fund | Annual Report | 7/31/15 This page for your notes. Pioneer Government Income Fund | Annual Report | 7/31/15 59 This page for your notes. 60 Pioneer Government Income Fund | Annual Report | 7/31/15 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 19422-09-0915