OMB APPROVAL OMB Number: 3235-0570 Expires: August 31, 2013 Estimated average burden hours per response.....18.9 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM N-CSR CERTIFIED SHAREHOLDER REPORT OF REGISTERED MANAGEMENT INVESTMENT COMPANIES 		Investment Company Act file number 811-21460 Pioneer Series Trust II (Exact name of registrant as specified in charter) 60 State Street, Boston, MA 02109 (Address of principal executive offices) (ZIP code) Terrence J. Cullen, Pioneer Investment Management, Inc., 60 State Street, Boston, MA 02109 (Name and address of agent for service) Registrant's telephone number, including area code: (617) 742-7825 Date of fiscal year end: December 31 Date of reporting period: January 1, 2013 through June 30, 2013 Form N-CSR is to be used by management investment companies to file reports with the Commission not later than 10 days after the transmission to stockholders of any report that is required to be transmitted to stockholders under Rule 30e-1 under the Investment Company Act of 1940 (17 CFR 270.30e-1). The Commission may use the information provided on Form N-CSR in its regulatory, disclosure review, inspection, and policymaking roles. A registrant is required to disclose the information specified by Form N-CSR, and the Commission will make this information public. A registrant is not required to respond to the collection of information contained in Form N-CSR unless the Form displays a currently valid Office of Management and Budget ("OMB") control number. Please direct comments concerning the accuracy of the information collection burden estimate and any suggestions for reducing the burden to Secretary, Securities and Exchange Commission, 450 Fifth Street, NW, Washington, DC 20549-0609. The OMB has reviewed this collection of information under the clearance requirements of 44 U.S.C. ss. 3507. ITEM 1. REPORTS TO SHAREOWNERS. Pioneer AMT-Free Municipal Fund -------------------------------------------------------------------------------- Semiannual Report | June 30, 2013 -------------------------------------------------------------------------------- Ticker Symbols: Class A PBMFX Class B PBMUX Class C MNBCX Class Y PBYMX [LOGO] PIONEER Investments(R) visit us: us.pioneerinvestments.com Table of Contents Letter to Shareowners 2 Portfolio Management Discussion 4 Portfolio Summary 8 Prices and Distributions 9 Performance Update 10 Comparing Ongoing Fund Expenses 14 Schedule of Investments 16 Financial Statements 31 Notes to Financial Statements 39 Trustees, Officers and Service Providers 46 Pioneer AMT-Free Municipal Fund | Semiannual Report | 6/30/13 1 President's Letter Dear Shareowner, When we look at the U.S. economy as we head into the second half of 2013, we continue to see slow, but ongoing, growth. Employment has been steadily rising. Consumer incomes, savings, wealth, and debt-servicing capacity have been solid buttresses for the recovering housing and auto industries. Industrial activity is growing only modestly, but current corporate profits are generally solid and balance sheets appear able to support needed capital spending and dividend* payouts. The scaled-back "fiscal cliff" tax increases and spending cuts have meaningfully cut the budget deficit without, it seems, driving the economy back into recession. In addition, we feel that continuing slack in labor markets and capacity utilization offers the potential for continuing growth without bottlenecks and rising inflation. After observing the strengthening economic trends, the Federal Reserve (the Fed) has hinted that it may begin to scale back its bond purchases (currently $85 billion per month in quantitative easing, or "QE") later in 2013, and could terminate the purchases altogether sometime in 2014, depending on subsequent economic data releases. Pioneer believes that, barring an external shock, modest economic growth can be sustained at least over the next couple of years without continuous, aggressive intervention from the Fed. The Fed has also said that short-term interest rates are likely to remain near zero for some time to come. Given that inflation remains subdued and unemployment remains high, there is no urgency about raising rates. While inflation is not a near-term concern, the Fed's aggressive monetary policies helped investors drive long-term Treasury yields to unsustainably low levels. A return to more normal levels in response to expectations of a stronger economy and the potential for less QE resulted in disappointing returns for bond investors during the first half of 2013, but the stock market rewarded shareholders who were undaunted by the double-barreled threat of the "fiscal cliff " and debt-ceiling debates at the beginning of 2013. The Standard & Poor's 500 Index, a broad measure of the U.S. stock market, returned 13.82% during the first six months of 2013, while the Barclays Aggregate Bond Index, which tracks the performance of a higher-quality U.S. bond universe, returned -2.44%. Investors showed a rising preference for higher-yielding corporate paper over government bonds during the first half of 2013, helping the Bank of America Merrill Lynch High Yield Master II Index, which measures the performance of high-yield corporate bonds, to post a 1.50% return for the six months ended June 30, 2013. Three-month Treasury bills, generally regarded as essentially "risk free" by the markets, returned 0.03% in the first half of 2013. * Dividends are not guaranteed. 2 Pioneer AMT-Free Municipal Fund | Semiannual Report | 6/30/13 There are certainly risks and uncertainties that continue to plague the global economy. Europe remains in recession and a number of countries in the emerging markets have experienced difficulties. Still, a potential ending of the European recession, continuing economic improvement in Japan in response to the new government's quantitative easing policies, and a "soft landing" of 7% growth in China could very well result in an improving global outlook over the remainder of 2013. There are also geopolitical worries abroad and political fights at home, and while most of the widely recognized risks we've outlined may already be "priced in" to the market, we believe investors should continue to expect market volatility. At Pioneer, we have long advocated the benefits of staying diversified and investing for the long term. And while diversification alone does not assure a profit or protect against loss in a declining market, we believe there are still opportunities for prudent investors to earn attractive returns. Our advice, as always, is to work closely with a trusted financial advisor to discuss your goals and work together to develop an investment strategy that meets your individual needs, keeping in mind that there is no single best strategy that works for every investor. Pioneer's investment teams have, since 1928, sought out attractive opportunities in global equity and bond markets, using in-depth research to identify undervalued individual securities, and using thoughtful risk management to construct portfolios which balance potential risks and rewards in an ever-changing world. We encourage you to learn more about Pioneer and our time-tested approach to investing by consulting with your financial advisor or visiting us online at us.pioneerinvestments.com. We greatly appreciate your trust in us, and we thank you for investing with Pioneer. Sincerely, /s/ Daniel K. Kingsbury Daniel K. Kingsbury 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 AMT-Free Municipal Fund | Semiannual Report | 6/30/13 3 Portfolio Management Discussion | 6/30/13 In the following interview, portfolio manager David Eurkus reviews the market environment for municipal investments and the performance of AMT-Free Municipal Fund during the six months ended June 30, 2013. Mr. Eurkus, a senior vice president and a portfolio manager at Pioneer, manages the Fund along with Jonathan Chirunga, a vice president and a portfolio manager at Pioneer. Mr. Chirunga was named as a portfolio manager on the Fund on May 17, 2013, replacing Timothy Pynchon. Q How did the Fund perform during the six months ended June 30, 2013? A Pioneer AMT-Free Municipal Fund's Class A shares returned -4.16% at net asset value during the six months ended June 30, 2013, while the Fund's benchmark, the Barclays Municipal Bond Index (the Barclays Index), returned -2.69%. During the same period, the average return of the 262 mutual funds in Lipper's General Municipal Debt Funds category was -3.54%. Q How would you describe the investment environment for tax-exempt bonds during the six months ended June 30, 2013? A The municipal bond market experienced two distinctly different environments during the first six months of 2013. At the beginning of the year, tax-exempt issues were continuing to benefit from economic conditions that were conducive to gradual declines in taxable and tax-exempt interest rates. The U.S. economy maintained its growth trend, though at a moderate pace, and we saw no significant inflationary pressures on the domestic front. The U.S. Federal Reserve Board (the Fed) once again stated that short-term interest rates would remain near zero, with no indications that it would engage in monetary tightening anytime soon. With Europe still gripped by recession and investors worried about a significant economic slowdown in China, the only major economy in growth mode at the time was that of the United States. In April 2013, however, it became apparent that conditions for the bond markets would soon change. Fed officials began to hint that the central bank's program of monthly asset purchases, known as quantitative easing (QE), might be tapered in the relative near term if the U.S. economy continued to improve. In response to that news, many investors--concerned that the Fed would taper QE too quickly, allow long-term interest rates to rise and thus cut the economic recovery short--began to 4 Pioneer AMT-Free Municipal Fund | Semiannual Report | 6/30/13 sell out of stocks and bonds. Redemptions in the tax-exempt mutual fund market soon picked up, and then continued through much of the remainder of the six-month period. Additional comments later in the period by Fed Chairman Bernanke, which reaffirmed the Fed's intentions, gave additional momentum to both the redemptions and the bond market sell-off. By the close of the second quarter (June 30), the municipal bond market had experienced its worst sell-off in 25 years. Right around that same time, Fed officials attempted to reassure investors with regard to any potential tapering of QE by stating that any slowdown of bond purchases would be dependent on continued positive U.S. economic data releases; but, by then, the damage had been done. Q How would you describe your overall investment strategy for the Fund during the six months ended June 30, 2013? A Our principal investment strategy for the portfolio is to purchase and hold discounted long-term municipal bonds, as those types of investments offer the highest yields in the tax-exempt marketplace. We believe that, over the long term, our broadly diversified* strategy will enable the Fund to outperform its benchmark and its Lipper peers. The Fund also continues to have a strong focus on sectors vital to municipalities nationwide. The sectors include health care/hospitals, power and energy, public and private education, and transportation. Q What were the most significant contributors to and detractors from the Fund's performance relative to the benchmark Barclays Index during the six months ended June 30, 2013? A During a very difficult six-month period for municipal bond investing, and especially for long-duration tax-exempt bonds, many of the Fund's longer- maturity holdings detracted from benchmark-relative performance. (Duration is a measure of a portfolio's price-sensitivity to changes in interest rates.) One example of the portfolio's positioning that detracted from performance was the Fund's holdings of non-callable bonds issued by the Massachusetts Health & Education Authority for the Massachusetts Institute of Technology, with a duration of 25 years. The bonds had contributed significantly to the Fund's performance over the prior three years, but had a negative impact on performance during the first six months of 2013. The Fund did, however, own a few longer-maturity municipals that contributed to relative returns during the period, with the largest contribution coming from a position in a revenue bond issued by the Pennsylvania State Higher Education Facilities Authority. * Diversification does not assure a profit nor protect against loss in a declining market. Pioneer AMT-Free Municipal Fund | Semiannual Report | 6/30/13 5 Q What is your outlook for the municipal market for the remainder of 2013? A We feel that the sharp adjustment that took place in the taxable and tax-exempt bond markets during the second quarter of 2013 was very much overdone, and that it has created an unusual buying opportunity within the municipal market. Because long-term tax-free rates rose by such a large degree, and so quickly, yields on investment-grade municipal securities have moved higher than those of taxable bonds of similar maturity. Because tax-exempt bond yields are now so much higher, we believe we may see a substantial reduction in municipal issuance as states, cities and agencies will most likely be reluctant or even unable to pay higher coupon rates on potential new issues or on refinancings. We believe that a resulting lack of municipal supply would be constructive for the tax-exempt market going forward, and we already have been seeing increased market demand as taxable bond buyers enter the municipal market seeking attractive tax-equivalent yields. The Fund will continue to hold select long-term tax-exempt bonds that we believe have the strongest opportunity to perform well over time. We will also continue to closely monitor the Fund's holdings to ensure their integrity and quality as well as the timely payment of principal and interest on the investments. The Fund remains broadly diversified across many municipal bond sectors as of June 30, 2013, and the vast majority of the portfolio's holdings are allocated to bonds with dedicated revenue streams. We believe that Pioneer AMT-Free Municipal Fund continues to be a suitable option for long-term investors seeking high income that is free from federal taxes. 6 Pioneer AMT-Free Municipal Fund | Semiannual Report | 6/30/13 Please refer to the Schedule of Investments on pages 16-30 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 issuers of underlying securities and their inability to meet their debt obligations. 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. A portion of income may be subject to local, state, federal and/or alternative minimum tax. Capital gains, if any, are subject to capital gains tax. These risks may increase share price volatility. Past performance is not a guarantee of future results, and there is no guarantee that market forecasts discussed will be realized. 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. These opinions should not be relied upon for any other purposes. Pioneer AMT-Free Municipal Fund | Semiannual Report | 6/30/13 7 Portfolio Summary | 6/30/13 Portfolio Quality -------------------------------------------------------------------------------- (As a percentage of total investment portfolio) [THE FOLLOWING DATA WAS REPRESENTED AS A PIE CHART IN THE PRINTED MATERIAL] AAA 9.7% AA 25.1% A 26.5% BBB 25.5% BB 2.8% B 4.5% CCC 0.1% Not Rated 5.8% Bond ratings are ordered highest to lowest in portfolio. Based on Standard & Poor's measures, AAA (highest possible rating) through BBB are considered investment grade; BB or lower ratings are considered non-investment grade. Cash equivalents and some bonds may not be rated. Sector Distribution -------------------------------------------------------------------------------- (As a percentage of total investment portfolio) [THE FOLLOWING DATA WAS REPRESENTED AS A PIE CHART IN THE PRINTED MATERIAL] Health 23.1% Insured 21.3% Education 11.9% Special Revenues 9.9% Power 7.1% Pollution Control Revenue 6.1% Transportation 5.7% General Obligation 5.5% Various Revenues 3.5% Escrowed 2.3% Housing 1.9% Water & Sewer 1.7% 10 Largest Holdings* -------------------------------------------------------------------------------- (As a percentage of long-term holdings) 1. Massachusetts Health & Educational Facilities Authority, 5.5%, 7/1/32 1.77% ----------------------------------------------------------------------------------------- 2. Public Authority for Colorado Energy, 6.5%, 11/15/38 1.75 ----------------------------------------------------------------------------------------- 3. North Carolina Eastern Municipal Power Agency, 6.0%, 1/1/22 1.75 ----------------------------------------------------------------------------------------- 4. Texas Private Activity Bond Surface Transportation Corp., 7.0%, 6/30/40 1.46 ----------------------------------------------------------------------------------------- 5. Golden State Tobacco Securitization Corp., 5.125%, 6/1/47 1.36 ----------------------------------------------------------------------------------------- 6. California Statewide Communities Development Authority, 5.75%, 7/1/47 1.33 ----------------------------------------------------------------------------------------- 7. Phoenix Civic Improvement Corp., 7/1/43 1.26 ----------------------------------------------------------------------------------------- 8. Tobacco Settlement Authority of Washington, 6.625%, 6/1/32 1.25 ----------------------------------------------------------------------------------------- 9. Dallas County Utility & Reclamation District, 5.375%, 2/15/29 1.24 ----------------------------------------------------------------------------------------- 10. FYI Properties, 5.5%, 6/1/39 1.24 ----------------------------------------------------------------------------------------- * 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 AMT-Free Municipal Fund | Semiannual Report | 6/30/13 Prices and Distributions | 6/30/13 Net Asset Value per Share -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- Class 6/30/13 12/31/12 -------------------------------------------------------------------------------- A $13.70 $14.56 -------------------------------------------------------------------------------- B $13.58 $14.46 -------------------------------------------------------------------------------- C $13.59 $14.44 -------------------------------------------------------------------------------- Y $13.66 $14.52 -------------------------------------------------------------------------------- Distributions per Share: 1/1/13-6/30/13 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- Short-Term Long-Term Class Dividends Capital Gains Capital Gains -------------------------------------------------------------------------------- A $0.2660 $ -- $ -- -------------------------------------------------------------------------------- B $0.1990 $ -- $ -- -------------------------------------------------------------------------------- C $0.2099 $ -- $ -- -------------------------------------------------------------------------------- Y $0.2850 $ -- $ -- -------------------------------------------------------------------------------- Index Definition -------------------------------------------------------------------------------- The Barclays Municipal Bond Index is an unmanaged, broad measure of the municipal bond market. Index returns are calculated monthly, assume reinvestment of dividends and, unlike Fund returns, do not reflect any fees, expenses or sales charges. It is not possible to invest directly in an index. The index defined here pertains to the "Value of $10,000 Investment" and "Value of $5 Million Investment" charts shown on pages 10-13. Pioneer AMT-Free Municipal Fund | Semiannual Report | 6/30/13 9 Performance Update | 6/30/13 Class A Shares Investment Returns -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $10,000 investment made in Pioneer AMT-Free Municipal Fund at public offering price, compared to that of the Barclays Municipal Bond Index. Average Annual Total Returns (As of June 30, 2013) -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- Net Asset Public Offering Period Value (NAV) Price (POP) -------------------------------------------------------------------------------- 10 Years 4.50% 4.03% 5 Years 5.62 4.65 1 Year 1.08 -3.45 -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated May 1, 2013) -------------------------------------------------------------------------------- Gross Net -------------------------------------------------------------------------------- 0.83% 0.82% -------------------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $10,000 Investment Pioneer AMT-Free Barclays Municipal Municipal Fund Bond Index 6/30/2003 $ 9,550 $ 10,000 6/30/2004 $ 9,564 $ 10,076 6/30/2005 $ 10,567 $ 10,906 6/30/2006 $ 10,690 $ 11,002 6/30/2007 $ 11,183 $ 11,519 6/30/2008 $ 11,291 $ 11,891 6/30/2009 $ 10,963 $ 12,340 6/30/2010 $ 12,530 $ 13,526 6/30/2011 $ 12,889 $ 13,996 6/30/2012 $ 14,680 $ 15,382 6/30/2013 $ 14,839 $ 15,418 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 AMT-Free Municipal Fund acquired the assets and liabilities of predecessor fund Safeco Municipal Bond Fund on December 10, 2004. The performance shown for Class A shares of the Fund for periods prior to December 10, 2004, is based on the performance of the predecessor fund's Class A shares, which has been restated to reflect differences in any applicable sales charges (but not differences in expenses). If all the expenses of the Fund were reflected, the performance of the Fund's Class A shares would be lower than the performance 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 net expense ratio reflects the contractual expense limitation currently in effect through May 1, 2014, for Class A shares. There can be no assurance that Pioneer will extend the expense limitation beyond such time. Please see the prospectus and financial statements for more information. 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 AMT-Free Municipal Fund | Semiannual Report | 6/30/13 Performance Update | 6/30/13 Class B Shares Investment Returns -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $10,000 investment made in Pioneer AMT-Free Municipal Fund, compared to that of the Barclays Municipal Bond Index. Average Annual Total Returns (As of June 30, 2013) -------------------------------------------------------------------------------- If If Period Held Redeemed -------------------------------------------------------------------------------- 10 Years 3.60% 3.60% 5 Years 4.65 4.65 1 Year -0.06 -3.95 -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated May 1, 2013) -------------------------------------------------------------------------------- Gross Net -------------------------------------------------------------------------------- 1.75% 1.72% -------------------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $10,000 Investment Pioneer AMT-Free Barclays Municipal Municipal Fund Bond Index 6/30/2003 $ 10,000 $ 10,000 6/30/2004 $ 9,936 $ 10,076 6/30/2005 $ 10,887 $ 10,906 6/30/2006 $ 10,943 $ 11,002 6/30/2007 $ 11,343 $ 11,519 6/30/2008 $ 11,345 $ 11,891 6/30/2009 $ 10,921 $ 12,340 6/30/2010 $ 12,369 $ 13,526 6/30/2011 $ 12,622 $ 13,996 6/30/2012 $ 14,247 $ 15,382 6/30/2013 $ 14,239 $ 15,418 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. "If Held" results represent the percent change in net asset value per share. Returns would have been lower had sales charges been reflected. "If Redeemed" returns reflect the deduction of applicable contingent deferred sales charge (CDSC). The maximum CDSC is 4% and declines over five years. For more complete information, please see the prospectus. 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 AMT-Free Municipal Fund acquired the assets and liabilities of predecessor fund Safeco Municipal Bond Fund on December 10, 2004. The performance shown for Class B shares of the Fund for periods prior to December 10, 2004, is based on the performance of the predecessor fund's Class B shares, which has been restated to reflect differences in any applicable sales charges (but not differences in expenses). If all the expenses of the Fund were reflected, the performance of the Fund's Class B shares would be lower than the performance 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 net expense ratio reflects the contractual expense limitation currently in effect through May 1, 2014, for Class B shares. There can be no assurance that Pioneer will extend the expense limitation beyond such time. Please see the prospectus and financial statements for more information. The performance table and graph do not reflect the deduction of taxes that a shareowner would pay on Fund distributions or the redemption of Fund shares. Pioneer AMT-Free Municipal Fund | Semiannual Report | 6/30/13 11 Performance Update | 6/30/13 Class C Shares Investment Returns -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $10,000 investment made in Pioneer AMT-Free Municipal Fund, compared to that of the Barclays Municipal Bond Index. Average Annual Total Returns (As of June 30, 2013) -------------------------------------------------------------------------------- If If Period Held Redeemed -------------------------------------------------------------------------------- Life-of-Class (10/1/2003) 3.83% 3.83% 5 Years 4.77 4.77 1 Year 0.31 0.31 -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated May 1, 2013) -------------------------------------------------------------------------------- Gross -------------------------------------------------------------------------------- 1.58% -------------------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $10,000 Investment Pioneer AMT-Free Barclays Municipal Municipal Fund Bond Index 10/31/2003 $ 10,000 $ 10,000 6/30/2004 $ 10,061 $ 10,119 6/30/2005 $ 10,992 $ 10,952 6/30/2006 $ 11,049 $ 11,049 6/30/2007 $ 11,474 $ 11,568 6/30/2008 $ 11,496 $ 11,942 6/30/2009 $ 11,065 $ 12,393 6/30/2010 $ 12,542 $ 13,584 6/30/2011 $ 12,801 $ 14,056 6/30/2012 $ 14,468 $ 15,448 6/30/2013 $ 14,513 $ 15,484 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 AMT-Free Municipal Fund acquired the assets and liabilities of predecessor fund Safeco Municipal Bond Fund on December 10, 2004. The performance shown for Class C shares of the Fund for periods prior to December 10, 2004, is based on the performance of the predecessor fund's Class C shares, which has been restated to reflect differences in any applicable sales charges (but not differences in expenses). If all the expenses of the Fund were reflected, the performance of the Fund's Class C shares would be lower than the performance 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. 12 Pioneer AMT-Free Municipal Fund | Semiannual Report | 6/30/13 Performance Update | 6/30/13 Class Y Shares Investment Returns -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $5 million investment made in Pioneer AMT-Free Municipal Fund, compared to that of the Barclays Municipal Bond Index. Average Annual Total Returns (As of June 30, 2013) -------------------------------------------------------------------------------- If If Period Held Redeemed -------------------------------------------------------------------------------- 10 Years 4.67% 4.67% 5 Years 5.86 5.86 1 Year 1.28 1.28 -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated May 1, 2013) -------------------------------------------------------------------------------- Gross Net -------------------------------------------------------------------------------- 0.58% 0.55% -------------------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $5 Million Investment Pioneer AMT-Free Barclays Municipal Municipal Fund Bond Index 6/30/2003 $ 5,000,000 $ 5,000,000 6/30/2004 $ 5,006,229 $ 5,037,875 6/30/2005 $ 5,531,321 $ 5,452,842 6/30/2006 $ 5,595,464 $ 5,501,110 6/30/2007 $ 5,863,354 $ 5,759,382 6/30/2008 $ 5,936,831 $ 5,945,605 6/30/2009 $ 5,778,326 $ 6,170,019 6/30/2010 $ 6,615,904 $ 6,763,099 6/30/2011 $ 6,828,880 $ 6,998,142 6/30/2012 $ 7,794,266 $ 7,690,987 6/30/2013 $ 7,893,655 $ 7,709,098 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 AMT-Free Municipal Fund acquired the assets and liabilities of predecessor Safeco Municipal Bond Fund on December 10, 2004. The performance shown for Class Y shares of the Fund for periods prior to December 10, 2004, is based on the net asset value performance of the predecessor fund's Class A shares, which has not been restated to reflect differences in expenses, including 12b-1 fees applicable to Class A shares. If all the expenses of the Fund were reflected, the performance of the Fund's Class Y shares would be lower than the performance shown. Performance shown for the period between December 10, 2004, and the inception of Class Y shares on November 10, 2006, reflects the NAV performance of Pioneer AMT-Free Municipal Fund's Class A shares. The performance does not reflect differences in expenses, including the Rule 12b-1 fees applicable to Class A shares. Since fees for Class A shares are generally higher than those of Class Y shares, the performance of Class Y shares for the period between December 10, 2004, and the inception of Class Y shares on November 10, 2006, would have been higher than that shown. Class Y shares are not subject to sales charges and are available for limited groups of eligible investors, including institutional investors. All results are historical and assume the reinvestment of dividends and capital gains. Other share classes are available for which performance and expenses will differ. Performance results reflect any applicable expense waivers in effect during the periods shown. Without such waivers Fund performance would be lower. Waivers may not be in effect for all funds. Certain fee waivers are contractual through a specified period. Otherwise, fee waivers can be rescinded at any time. See the prospectus and financial statements for more information. The net expense ratio reflects the contractual expense limitation currently in effect through May 1, 2014, for Class Y shares. There can be no assurance that Pioneer will extend the expense limitation beyond such time. Please see the prospectus and financial statements for more information. 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 AMT-Free Municipal Fund | Semiannual Report | 6/30/13 13 Comparing Ongoing Fund Expenses As a shareowner in the Fund, you incur two types of costs: (1) ongoing costs, including management fees, distribution and/or service (12b-1) fees, and other Fund expenses; and (2) transaction costs, including sales charges (loads) on purchase payments. This example is intended to help you understand your ongoing expenses (in dollars) of investing in the Fund and to compare these costs with the ongoing costs of investing in other mutual funds. The example is based on an investment of $1,000 at the beginning of the Fund's latest six-month period and held throughout the six months. Using the Tables -------------------------------------------------------------------------------- Actual Expenses The first table below provides information about actual account values and actual expenses.You may use the information in this table, together with the amount you invested, to estimate the expenses that you paid over the period as follows: (1) Divide your account value by $1,000 Example: an $8,600 account value (divided by) $1,000 = 8.6 (2) Multiply the result in (1) above by the corresponding share class's number in the third row under the heading entitled "Expenses Paid During Period" to estimate the expenses you paid on your account during this period. Expenses Paid on a $1,000 Investment in Pioneer AMT-Free Municipal Fund Based on actual returns from January 1, 2013, through June 30, 2013. ---------------------------------------------------------------------------------------------------------- Share Class A B C Y ---------------------------------------------------------------------------------------------------------- Beginning Account $1,000.00 $1,000.00 $1,000.00 $1,000.00 Value on 1/1/13 ---------------------------------------------------------------------------------------------------------- Ending Account $ 958.40 $ 952.30 $ 955.00 $ 959.60 Value on 6/30/13 ---------------------------------------------------------------------------------------------------------- Expenses Paid $ 3.98 $ 8.33 $ 7.61 $ 2.67 During Period* ---------------------------------------------------------------------------------------------------------- * Expenses are equal to the Fund's annualized expense ratio of 0.82%, 1.72%, 1.57% and 0.55%, for Class A, Class B, Class C and Class Y shares, respectively, multiplied by the average account value over the period, multiplied by 181/365 (to reflect the one-half year period). 14 Pioneer AMT-Free Municipal Fund | Semiannual Report | 6/30/13 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 AMT-Free Municipal Fund Based on a hypothetical 5% per year return before expenses, reflecting the period from January 1, 2013, through June 30, 2013. ---------------------------------------------------------------------------------------------------------- Share Class A B C Y ---------------------------------------------------------------------------------------------------------- Beginning Account $1,000.00 $1,000.00 $1,000.00 $1,000.00 Value on 1/1/13 ---------------------------------------------------------------------------------------------------------- Ending Account $1,020.73 $1,016.27 $1,017.01 $1,022.07 Value on 6/30/13 ---------------------------------------------------------------------------------------------------------- Expenses Paid $ 4.11 $ 8.60 $ 7.85 $ 2.76 During Period* ---------------------------------------------------------------------------------------------------------- * Expenses are equal to the Fund's annualized expense ratio of 0.82%, 1.72%, 1.57% and 0.55%, for Class A, Class B, Class C and Class Y shares, respectively, multiplied by the average account value over the period, multiplied by 181/365 (to reflect the one-half year period). Pioneer AMT-Free Municipal Fund | Semiannual Report | 6/30/13 15 Schedule of Investments | 6/30/13 (unaudited) -------------------------------------------------------------------------------------------------------------- Shares Value -------------------------------------------------------------------------------------------------------------- COMMON STOCKS -- 0.1% Commercial Services & Supplies -- 0.1% Research & Consulting Services -- 0.1% 200 Center For Medical Science, Inc. (144A)* $ 640,000 -------------------------------------------------------------------------------------------------------------- Total Commercial Services & Supplies $ 640,000 -------------------------------------------------------------------------------------------------------------- TOTAL COMMON STOCKS (Cost $640,000) $ 640,000 -------------------------------------------------------------------------------------------------------------- -------------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (c) Ratings Amount ($) (unaudited) (unaudited) -------------------------------------------------------------------------------------------------------------- MUNICIPAL BONDS -- 99.0% Alabama -- 0.2% 1,500,000 NR/NR Sylacauga Health Care Authority, 6.0%, 8/1/35 $ 1,471,140 -------------------------------------------------------------------------------------------------------------- Arizona -- 4.3% 5,145,000 AA-/NR Arizona Health Facilities Authority, 5.5%, 1/1/38 $ 5,427,924 1,000,000 A/A1 Maricopa County Pollution Control Corp., 5.0%, 6/1/35 1,040,900 4,000,000 AA/Aa3 Phoenix Civic Improvement Corp., 7/1/25 4,594,800 8,005,000 AA/Aa3 Phoenix Civic Improvement Corp., 7/1/26 9,140,029 10,000,000 AA/Aa3 Phoenix Civic Improvement Corp., 7/1/43 10,817,400 3,470,000 AA/Aa2 Pima County Industrial Development Authority, 5.0%, 7/1/20 3,851,006 500,000 BBB-/NR Pima County Industrial Development Authority, 6.1%, 6/1/45 492,370 949,000 NR/Baa3 Pima County Industrial Development Authority, 6.75%, 7/1/31 949,152 --------------- $ 36,313,581 -------------------------------------------------------------------------------------------------------------- California -- 12.5% 10,000,000 A/A3 Alameda Corridor Transportation Authority, 0.0%, 10/1/31 (b) $ 3,896,000 410,000 AA-/A2 Anaheim Public Financing Authority, 0.0%, 9/1/22 (b) 278,410 13,865,000 AA-/A2 Anaheim Public Financing Authority, 0.0%, 9/1/23 (b) 9,088,646 12,595,000 AA-/A2 Anaheim Public Financing Authority, 0.0%, 9/1/36 (b) 3,178,726 3,520,000 CCC/NR California County Tobacco Securitization Agency, 0.0%, 6/1/33 (b) 797,069 1,000,000 AAA/Aaa California Educational Facilities Authority, 5.25%, 4/1/40 1,207,870 2,000,000 A/A3 California Health Facilities Financing Authority, 5.625%, 7/1/32 2,061,720 The accompanying notes are an integral part of these financial statements. 16 Pioneer AMT-Free Municipal Fund | Semiannual Report | 6/30/13 -------------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (c) Ratings Amount ($) (unaudited) (unaudited) Value -------------------------------------------------------------------------------------------------------------- California -- (continued) 4,000,000 BBB/Baa2 California Municipal Finance Authority, 5.25%, 2/1/37 $ 4,031,000 4,875,000 NR/Baa2 California Statewide Communities Development Authority, 5.0%, 5/15/30 4,905,908 4,125,000 NR/Baa2 California Statewide Communities Development Authority, 5.0%, 5/15/38 4,021,586 6,455,000 BBB+/Baa2 California Statewide Communities Development Authority, 5.0%, 8/15/47 6,492,439 10,000,000 AA-/Aa3 California Statewide Communities Development Authority, 5.25%, 11/15/48 10,136,700 4,000,000 NR/Baa1 California Statewide Communities Development Authority, 5.375%, 12/1/37 4,089,760 10,000,000 AA-/A1 California Statewide Communities Development Authority, 5.75%, 7/1/47 11,098,200 4,000,000 A/NR California Statewide Communities Development Authority, 5.75%, 8/15/38 4,235,960 1,000,000 NR/A1 Franklin-Mckinley School District, 6.0%, 7/1/16 1,138,710 2,100,000 BBB-/WR Fresno Joint Powers Financing Authority, 4.75%, 9/1/28 1,921,983 15,000,000 B-/B3 Golden State Tobacco Securitization Corp., 5.125%, 6/1/47 11,606,250 3,000,000 A-/Baa2 Long Beach Bond Finance Authority, 5.5%, 11/15/37 3,166,170 2,180,000 A/Baa1 Pomona Unified School District, 6.55%, 8/1/29 2,670,740 1,000,000 BBB+/NR Redding Redevelopment Agency, 4.5%, 9/1/26 958,000 3,000,000 A-/NR Rialto Redevelopment Agency, 6.25%, 9/1/37 3,144,870 1,500,000 AA-/Aa1 San Jose Evergreen Community College District, 5.0%, 8/1/41 1,585,215 2,085,000 NR/Aa2 San Juan Unified School District, 5.0%, 8/1/25 2,314,121 1,500,000 A/Ba1 Santa Cruz County Redevelopment Agency, 6.625%, 9/1/29 1,695,930 1,405,000 A+/Aa3 Santa Maria Joint Union High School District, 0.0%, 8/1/27 (b) 683,434 3,500,000 A+/Aa2 Saugus Union School District, 0.0%, 8/1/23 (b) 2,273,250 3,750,000 BB+/B3 Tobacco Securitization Authority of Southern California, 5.0%, 6/1/37 3,091,388 The accompanying notes are an integral part of these financial statements. Pioneer AMT-Free Municipal Fund | Semiannual Report | 6/30/13 17 Schedule of Investments | 6/30/13 (unaudited) (continued) -------------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (c) Ratings Amount ($) (unaudited) (unaudited) Value -------------------------------------------------------------------------------------------------------------- California -- (continued) 1,125,000 B+/B2 Tobacco Securitization Authority of Southern California, 5.125%, 6/1/46 $ 903,161 --------------- $ 106,673,216 -------------------------------------------------------------------------------------------------------------- Colorado -- 4.3% 2,750,000 5.25 AA-/Aa3 Colorado Health Facilities Authority, Floating Rate Note, 11/15/35 $ 2,910,682 15,000,000 A/Baa1 E-470 Public Highway Authority, 0.0%, 9/1/23 (b) 9,368,400 5,000,000 A/Baa1 E-470 Public Highway Authority, 0.0%, 9/1/27 (b) 2,385,300 12,500,000 A-/Baa2 Public Authority for Colorado Energy, 6.5%, 11/15/38 14,916,623 2,500,000 NR/Baa3 Regional Transportation District, 6.0%, 1/15/26 2,825,450 1,250,000 NR/Baa3 Regional Transportation District, 6.0%, 1/15/34 1,359,775 1,000,000 NR/Baa3 Regional Transportation District, 6.0%, 1/15/41 1,094,100 2,000,000 NR/Baa3 Regional Transportation District, 6.5%, 1/15/30 2,263,720 --------------- $ 37,124,050 -------------------------------------------------------------------------------------------------------------- Connecticut -- 1.0% 4,795,000 AAA/Aaa Connecticut State Health & Educational Facility Authority, 5.0%, 7/1/42 $ 5,068,651 1,000,000 NR/NR Connecticut State Health & Educational Facility Authority, 5.5%, 7/1/17 1,001,710 2,470,000 B/NR Mohegan Tribe of Indians of Connecticut, 6.25%, 1/1/31 2,470,543 --------------- $ 8,540,904 -------------------------------------------------------------------------------------------------------------- Delaware -- 0.6% 5,000,000 NR/Baa3 Delaware State Economic Development Authority, 5.375%, 10/1/45 $ 4,868,850 -------------------------------------------------------------------------------------------------------------- District of Columbia -- 2.1% 10,000,000 BBB/Baa1 District of Columbia Tobacco Settlement Financing Corp., 6.75%, 5/15/40 $ 10,174,600 7,950,000 NR/A1 District of Columbia, 4.25%, 6/1/37 7,449,945 --------------- $ 17,624,545 -------------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 18 Pioneer AMT-Free Municipal Fund | Semiannual Report | 6/30/13 -------------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (c) Ratings Amount ($) (unaudited) (unaudited) Value -------------------------------------------------------------------------------------------------------------- Florida -- 3.8% 7,500,000 NR/Baa1 City of Tallahassee Florida, 6.375%, 12/1/30 $ 7,507,275 520,000 NR/NR County of Madison Florida, 6.0%, 7/1/25 486,226 5,000,000 A/A2 County of Miami-Dade Florida Aviation Revenue, 5.5%, 10/1/41 5,297,650 4,885,000 A/Aa3 County of Miami-Dade Florida, 5.0%, 6/1/22 5,152,405 3,000,000 NR/Baa1 Escambia County Health Facilities Authority, 6.0%, 8/15/36 3,203,820 1,390,000 NR/NR Florida Development Finance Corp., 6.0%, 9/15/30 1,418,356 1,830,000 A+/Aa3 Greater Orlando Aviation Authority, 5.0%, 10/1/25 2,041,640 1,525,000 BB/NR Lee County Industrial Development Authority Florida, 4.75%, 6/15/14 1,546,808 2,000,000 BB/NR Lee County Industrial Development Authority Florida, 5.375%, 6/15/37 1,861,320 3,400,000 NR/NR St. Johns County Industrial Development Authority, 6.0%, 8/1/45 3,590,332 --------------- $ 32,105,832 -------------------------------------------------------------------------------------------------------------- Georgia -- 1.6% 5,750,000 A/Baa1 Burke County Development Authority, 7.0%, 1/1/23 $ 6,747,510 5,000,000 A-/Baa2 Main Street Natural Gas, Inc., 5.5%, 9/15/28 5,618,750 1,500,000 A/A2 Municipal Electric Authority of Georgia, 5.625%, 1/1/26 1,715,775 --------------- $ 14,082,035 -------------------------------------------------------------------------------------------------------------- Illinois -- 3.4% 3,000,000 NR/NR Illinois Finance Authority, 5.1%, 8/15/31 $ 3,082,260 1,580,000 NR/A2 Illinois Finance Authority, 5.25%, 10/1/24 (Pre-Refunded) 1,676,080 1,000,000 BBB+/Baa1 Illinois Finance Authority, 5.25%, 5/1/40 1,009,650 4,000,000 BBB-/NR Illinois Finance Authority, 5.5%, 8/15/30 4,136,760 1,600,000 AA-/A3 Illinois Finance Authority, 6.0%, 8/15/25 1,655,920 1,000,000 NR/NR Illinois Finance Authority, 6.125%, 5/15/27 1,016,950 5,000,000 NR/Baa3 Illinois Finance Authority, 6.5%, 4/1/39 5,372,600 The accompanying notes are an integral part of these financial statements. Pioneer AMT-Free Municipal Fund | Semiannual Report | 6/30/13 19 Schedule of Investments | 6/30/13 (unaudited) (continued) -------------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (c) Ratings Amount ($) (unaudited) (unaudited) Value -------------------------------------------------------------------------------------------------------------- Illinois -- (continued) 20,000,000 AAA/Baa1 Metropolitan Pier & Exposition Authority, 0.0%, 6/15/39 (b) $ 4,707,200 5,000,000 AA+/#Aaa Metropolitan Pier & Exposition Authority, 7.0%, 7/1/26 (Pre-Refunded) 6,781,700 --------------- $ 29,439,120 -------------------------------------------------------------------------------------------------------------- Indiana -- 2.5% 3,500,000 NR/Baa2 Delaware County Hospital Authority Indiana, 5.0%, 8/1/24 $ 3,647,770 2,000,000 AA/Aa2 Indiana Bond Bank, 5.5%, 2/1/29 2,215,480 2,000,000 BB-/B1 Indiana Finance Authority, 6.0%, 12/1/26 2,046,440 5,000,000 AA-/A1 Indiana Health & Educational Facilities Financing Authority, 4.75%, 2/15/34 4,903,050 7,000,000 AA-/A1 Indiana Health & Educational Facilities Financing Authority, 5.0%, 2/15/39 7,003,010 500,000 AA/Aa1 Indianapolis Local Public Improvement Bond Bank, 6.0%, 1/10/20 565,145 335,000 AA/NR Indianapolis Local Public Improvement Bond Bank, 6.75%, 2/1/14 (Pre-Refunded) 347,385 260,000 A-/A1 Lawrence Township Metropolitan School District, 6.75%, 7/5/13 260,302 --------------- $ 20,988,582 -------------------------------------------------------------------------------------------------------------- Louisiana -- 2.8% 6,000,000 BBB-/Baa3 Jefferson Parish Hospital Service District No. 2, 6.375%, 7/1/41 $ 6,432,600 615,000 BBB+/Baa1 Louisiana Local Government Environmental Facilities & Community Development Authority, 5.25%, 12/1/18 616,267 10,000,000 NR/Baa1 Louisiana Public Facilities Authority, 5.5%, 5/15/47 10,277,900 400,000 A-/A3 Louisiana State Citizens Property Insurance Corp., 5.0%, 6/1/24 432,260 500,000 AA-/A2 Louisiana State Citizens Property Insurance Corp., 5.0%, 6/1/24 546,230 3,000,000 BBB/Baa2 Parish of St. John the Baptist Louisiana, 5.125%, 6/1/37 3,007,470 3,000,000 A-/A3 Tobacco Settlement Financing Corp. Louisiana, 5.875%, 5/15/39 2,992,500 --------------- $ 24,305,227 -------------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 20 Pioneer AMT-Free Municipal Fund | Semiannual Report | 6/30/13 -------------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (c) Ratings Amount ($) (unaudited) (unaudited) Value -------------------------------------------------------------------------------------------------------------- Maine -- 1.0% 4,500,000 NR/Baa3 Maine Health & Higher Educational Facilities Authority, 6.75%, 7/1/36 $ 5,087,295 3,040,000 NR/Baa3 Maine Health & Higher Educational Facilities Authority, 6.95%, 7/1/41 3,468,154 --------------- $ 8,555,449 -------------------------------------------------------------------------------------------------------------- Maryland -- 1.5% 3,000,000 BB+/Ba2 County of Frederick Maryland, 5.625%, 9/1/38 $ 2,774,130 400,000 NR/NR Maryland Economic Development Corp., 5.0%, 12/1/16 347,988 900,000 NR/NR Maryland Economic Development Corp., 5.0%, 12/1/16 782,973 1,000,000 NR/NR Maryland Economic Development Corp., 5.0%, 12/1/31 659,720 1,200,000 BB/NR Maryland Economic Development Corp., 5.75%, 9/1/25 1,269,540 2,000,000 A/A3 Maryland Economic Development Corp., 6.2%, 9/1/22 2,375,820 4,400,000 NR/Baa3 Maryland Health & Higher Educational Facilities Authority, 5.75%, 7/1/38 4,432,736 --------------- $ 12,642,907 -------------------------------------------------------------------------------------------------------------- Massachusetts -- 12.0% 4,000,000 NR/Aa2 City of Pittsfield Massachusetts, 5.0%, 3/1/19 $ 4,610,280 2,000,000 NR/A2 Massachusetts Development Finance Agency, 4.0%, 10/1/35 1,892,520 2,500,000 A+/Aa3 Massachusetts Development Finance Agency, 4.0%, 9/1/49 2,180,350 1,000,000 A-/A3 Massachusetts Development Finance Agency, 5.0%, 10/1/21 1,164,770 1,000,000 A-/A3 Massachusetts Development Finance Agency, 5.0%, 10/1/22 1,143,720 1,000,000 A-/A3 Massachusetts Development Finance Agency, 5.0%, 10/1/30 1,039,700 4,000,000 A/A1 Massachusetts Development Finance Agency, 5.0%, 10/1/48 4,133,720 1,585,000 AA+/Aa1 Massachusetts Development Finance Agency, 5.0%, 6/1/25 1,766,070 4,200,000 AA+/Aa1 Massachusetts Development Finance Agency, 5.0%, 7/1/43 4,504,164 4,000,000 BBB+/NR Massachusetts Development Finance Agency, 5.0%, 7/1/44 3,795,000 1,250,000 A+/A1 Massachusetts Development Finance Agency, 5.0%, 9/1/50 1,284,175 The accompanying notes are an integral part of these financial statements. Pioneer AMT-Free Municipal Fund | Semiannual Report | 6/30/13 21 Schedule of Investments | 6/30/13 (unaudited) (continued) -------------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (c) Ratings Amount ($) (unaudited) (unaudited) Value -------------------------------------------------------------------------------------------------------------- Massachusetts -- (continued) 1,000,000 A-/Baa1 Massachusetts Development Finance Agency, 5.125%, 7/1/26 $ 1,049,180 235,000 BBB/Baa2 Massachusetts Development Finance Agency, 5.15%, 10/1/14 239,143 1,680,000 BBB/NR Massachusetts Development Finance Agency, 5.25%, 10/1/29 1,710,610 3,320,000 BBB/NR Massachusetts Development Finance Agency, 5.25%, 10/1/37 3,332,284 1,980,000 AA-/A1 Massachusetts Development Finance Agency, 5.375%, 4/1/41 2,090,939 500,000 BBB-/NR Massachusetts Development Finance Agency, 5.5%, 1/1/35 475,220 1,100,000 BBB/Baa2 Massachusetts Development Finance Agency, 5.625%, 10/1/24 1,119,206 1,000,000 BBB/Baa2 Massachusetts Development Finance Agency, 5.7%, 10/1/34 1,010,260 6,185,000 A/WR Massachusetts Development Finance Agency, 5.75%, 1/1/42 6,992,885 2,635,000 NR/NR Massachusetts Development Finance Agency, 6.25%, 10/15/17 2,835,524 1,000,000 BBB/NR Massachusetts Development Finance Agency, 6.75%, 1/1/36 1,127,760 1,000,000 BBB/NR Massachusetts Development Finance Agency, 7.0%, 7/1/42 1,118,270 2,000,000 NR/A2 Massachusetts Health & Educational Facilities Authority, 4.125%, 10/1/37 1,925,600 4,500,000 BB/NR Massachusetts Health & Educational Facilities Authority, 4.625%, 8/15/28 4,034,700 3,750,000 BBB+/Baa1 Massachusetts Health & Educational Facilities Authority, 5.25%, 7/1/38 3,814,312 1,550,000 BBB-/Baa3 Massachusetts Health & Educational Facilities Authority, 5.25%, 7/15/18 1,551,906 2,335,000 BBB-/Baa3 Massachusetts Health & Educational Facilities Authority, 5.375%, 7/1/35 2,386,230 12,000,000 AAA/Aaa Massachusetts Health & Educational Facilities Authority, 5.5%, 7/1/32 14,892,240 1,000,000 AA-/Aa3 Massachusetts Port Authority, 5.0%, 7/1/32 1,077,370 1,000,000 AA-/Aa3 Massachusetts Port Authority, 5.0%, 7/1/33 1,073,450 7,000,000 AA+/Aa2 Massachusetts School Building Authority, 5.0%, 8/15/29 7,733,600 3,975,000 AA/Aa2 Massachusetts State College Building Authority, 5.0%, 5/1/28 4,327,066 2,000,000 AAA/NR Town of Chatham Massachusetts, 3.5%, 6/15/37 1,781,340 The accompanying notes are an integral part of these financial statements. 22 Pioneer AMT-Free Municipal Fund | Semiannual Report | 6/30/13 -------------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (c) Ratings Amount ($) (unaudited) (unaudited) Value -------------------------------------------------------------------------------------------------------------- Massachusetts -- (continued) 4,500,000 AA+/NR Town of Wilmington Massachusetts, 4.0%, 3/15/37 $ 4,313,205 2,500,000 AA-/Aa2 University of Massachusetts Building Authority, 5.0%, 11/1/39 2,671,025 --------------- $ 102,197,794 -------------------------------------------------------------------------------------------------------------- Michigan -- 1.4% 3,000,000 AA-/Aa3 City of Detroit Michigan Water Supply System Revenue, 6.25%, 7/1/36 $ 3,104,190 1,500,000 BB-/NR John Tolfree Health System Corp., 6.0%, 9/15/23 1,446,645 1,405,000 NR/NR Meridian Economic Development Corp. Michigan, 5.25%, 7/1/26 1,370,746 3,235,000 NR/NR Michigan Public Educational Facilities Authority, 5.875%, 6/1/37 2,969,115 2,000,000 NR/NR Michigan State Hospital Finance Authority, 5.25%, 11/15/25 1,929,300 1,000,000 NR/NR Michigan State Hospital Finance Authority, 5.5%, 11/15/35 918,070 --------------- $ 11,738,066 -------------------------------------------------------------------------------------------------------------- Mississippi -- 1.4% 7,950,000 BBB-/Baa3 County of Lowndes Mississippi, 6.8%, 4/1/22 $ 9,047,816 2,750,000 BBB/Baa3 County of Warren Mississippi, 5.8%, 5/1/34 2,966,728 --------------- $ 12,014,544 -------------------------------------------------------------------------------------------------------------- Missouri -- 0.0%+ 80,000 NR/Aaa Missouri State Environmental Improvement & Energy Resources Authority, 5.125%, 1/1/20 $ 80,306 -------------------------------------------------------------------------------------------------------------- New Hampshire -- 1.2% 1,500,000 NR/A2 New Hampshire Health & Education Facilities Authority, 4.0%, 10/1/33 $ 1,338,390 5,000,000 A-/NR New Hampshire Health & Education Facilities Authority, 5.0%, 10/1/32 5,166,000 3,750,000 A-/NR New Hampshire Health & Education Facilities Authority, 5.0%, 10/1/37 3,815,850 --------------- $ 10,320,240 -------------------------------------------------------------------------------------------------------------- New Jersey -- 1.5% 1,250,000 BBB/Baa3 Camden County Improvement Authority, 5.75%, 2/15/34 $ 1,270,275 475,000 NR/NR New Jersey Economic Development Authority, 5.3%, 11/1/26 437,998 450,000 NR/NR New Jersey Economic Development Authority, 5.375%, 11/1/36 382,064 The accompanying notes are an integral part of these financial statements. Pioneer AMT-Free Municipal Fund | Semiannual Report | 6/30/13 23 Schedule of Investments | 6/30/13 (unaudited) (continued) -------------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (c) Ratings Amount ($) (unaudited) (unaudited) Value -------------------------------------------------------------------------------------------------------------- New Jersey -- (continued) 3,000,000 AAA/Aaa New Jersey Educational Facilities Authority, 5.0%, 7/1/39 $ 3,240,090 5,115,000 BBB-/Baa3 New Jersey Health Care Facilities Financing Authority, 5.25%, 7/1/30 5,181,290 2,000,000 A+/A1 New Jersey Transportation Trust Fund Authority, 5.5%, 6/15/41 2,154,780 --------------- $ 12,666,497 -------------------------------------------------------------------------------------------------------------- New Mexico -- 0.1% 1,000,000 A/NR County of Dona Ana New Mexico, 5.25%, 12/1/25 $ 1,016,420 -------------------------------------------------------------------------------------------------------------- New York -- 2.5% 2,500,000 A-/A3 Albany Industrial Development Agency, 5.25%, 11/15/32 $ 2,586,725 6,000,000 AAA/Aaa New York State Dormitory Authority, 5.0%, 10/1/41 6,433,680 5,515,000 A/WR New York State Dormitory Authority, 5.25%, 7/1/24 6,046,811 1,000,000 BBB-/Baa3 Port Authority of New York & New Jersey, 6.0%, 12/1/36 1,117,140 3,400,000 BBB-/Baa3 Port Authority of New York & New Jersey, 6.0%, 12/1/42 3,786,784 1,500,000 AA-/Aa3 Port Authority of New York & New Jersey, 6.125%, 6/1/94 1,694,655 --------------- $ 21,665,795 -------------------------------------------------------------------------------------------------------------- North Carolina -- 1.9% 12,000,000 A-/Baa1 North Carolina Eastern Municipal Power Agency, 6.0%, 1/1/22 $ 14,645,280 2,250,000 A+/A1 North Carolina Medical Care Commission, 4.0%, 11/1/46 1,903,320 --------------- $ 16,548,600 -------------------------------------------------------------------------------------------------------------- Ohio -- 4.3% 10,000,000 B-/B3 Buckeye Tobacco Settlement Financing Authority, 5.75%, 6/1/34 $ 8,165,900 6,000,000 B-/B3 Buckeye Tobacco Settlement Financing Authority, 6.5%, 6/1/47 5,285,160 2,000,000 AAA/Aaa City of Cincinnati Ohio Water System Revenue, 5.0%, 12/1/36 2,143,280 2,250,000 AAA/Aaa City of Cincinnati Ohio Water System Revenue, 5.0%, 12/1/37 2,407,860 1,500,000 NR/NR County of Cuyahoga Ohio, 6.0%, 5/15/37 1,502,445 1,500,000 NR/NR County of Cuyahoga Ohio, 6.0%, 5/15/42 1,497,840 5,000,000 NR/A3 County of Lake Ohio, 6.0%, 8/15/43 5,304,650 The accompanying notes are an integral part of these financial statements. 24 Pioneer AMT-Free Municipal Fund | Semiannual Report | 6/30/13 -------------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (c) Ratings Amount ($) (unaudited) (unaudited) Value -------------------------------------------------------------------------------------------------------------- Ohio -- (continued) 10,000,000 AA/A2 JobsOhio Beverage System, 5.0%, 1/1/38 $ 10,344,200 --------------- $ 36,651,335 -------------------------------------------------------------------------------------------------------------- Oklahoma -- 1.9% 5,590,000 A/Baa1 McGee Creek Authority, 6.0%, 1/1/23 $ 6,291,880 10,645,000 A/NR Oklahoma Municipal Power Authority, 4.0%, 1/1/47 9,584,119 --------------- $ 15,875,999 -------------------------------------------------------------------------------------------------------------- Oregon -- 0.9% 3,000,000 NR/Aa1 Deschutes & Jefferson Counties School District No 2J Redmond Oregon, 3.0%, 6/15/32 $ 2,487,030 1,000,000 AA+/NR Marion County School District No 5 Cascade, 4.0%, 6/15/19 1,119,030 2,000,000 AA+/NR Multnomah County School District No 40, 0.0%, 6/15/30 (b) 881,260 2,000,000 AA+/NR Multnomah County School District No 40, 0.0%, 6/15/31 (b) 836,460 1,715,000 AA+/NR Multnomah County School District No 40, 0.0%, 6/15/32 (b) 666,055 1,735,000 A+/A1 Oregon Health & Science University, 4.0%, 7/1/31 1,687,183 --------------- $ 7,677,018 -------------------------------------------------------------------------------------------------------------- Pennsylvania -- 4.8% 2,190,000 NR/WR Allentown Area Hospital Authority, 6.0%, 11/15/16 (Pre-Refunded) $ 2,332,722 10,000,000 A/Baa2 Lehigh County Industrial Development Authority, 4.75%, 2/15/27 1 10,064,600 1,000,000 BBB/NR Montgomery County Industrial Development Authority Pennsylvania, 5.0%, 12/1/24 1,021,770 1,000,000 BBB/NR Montgomery County Industrial Development Authority Pennsylvania, 5.0%, 12/1/30 1,004,010 3,000,000 BBB+/A3 Northampton County General Purpose Authority, 5.5%, 8/15/40 3,097,080 1,000,000 BBB-/Baa3 Pennsylvania Higher Educational Facilities Authority, 5.0%, 7/1/42 934,780 1,000,000 BB+/Baa3 Pennsylvania Higher Educational Facilities Authority, 6.0%, 7/1/43 1,053,680 11,500,000 0.84 BBB+/WR Pennsylvania Higher Educational Facilities Authority, Floating Rate Note, 7/1/39 8,594,985 The accompanying notes are an integral part of these financial statements. Pioneer AMT-Free Municipal Fund | Semiannual Report | 6/30/13 25 Schedule of Investments | 6/30/13 (unaudited) (continued) -------------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (c) Ratings Amount ($) (unaudited) (unaudited) Value -------------------------------------------------------------------------------------------------------------- Pennsylvania -- (continued) 5,000,000 A-/A3 Pennsylvania Turnpike Commission, 5.3%, 12/1/41 $ 5,192,050 2,000,000 AA/Aa2 Philadelphia Hospitals & Higher Education Facilities Authority, 4.5%, 7/1/37 2,016,780 5,000,000 BB+/Ba1 Philadelphia Hospitals & Higher Education Facilities Authority, 5.0%, 7/1/34 4,676,050 1,000,000 AA-/A2 Sports & Exhibition Authority of Pittsburgh and Allegheny County, 5.0%, 2/1/30 1,041,740 --------------- $ 41,030,247 -------------------------------------------------------------------------------------------------------------- Puerto Rico -- 0.0%+ 75,000 NR/Baa3 Puerto Rico Public Buildings Authority, 5.25%, 7/1/33 (Pre-Refunded) $ 78,688 -------------------------------------------------------------------------------------------------------------- Rhode Island -- 0.6% 5,200,000 BB/Ba1 Tobacco Settlement Financing Corp. Rhode Island, 6.25%, 6/1/42 $ 5,148,000 -------------------------------------------------------------------------------------------------------------- South Carolina -- 1.1% 8,265,000 AA-/Aa3 South Carolina State Public Service Authority, 5.0%, 12/1/43 $ 8,652,381 500,000 AA+/Aaa State of South Carolina, 5.0%, 4/1/20 601,290 --------------- $ 9,253,671 -------------------------------------------------------------------------------------------------------------- South Dakota -- 0.1% 65,000 NR/Aaa South Dakota Conservancy District, 5.625%, 8/1/17 (Pre-Refunded) $ 65,279 1,000,000 AA-/A1 South Dakota Health & Educational Facilities Authority, 5.0%, 7/1/42 1,007,870 --------------- $ 1,073,149 -------------------------------------------------------------------------------------------------------------- Tennessee -- 0.5% 4,000,000 AA/Aa1 Metropolitan Government of Nashville & Davidson County Tennessee, 4.0%, 7/1/24 $ 4,305,520 -------------------------------------------------------------------------------------------------------------- Texas -- 7.4% 7,100,000 BBB-/Baa2 Central Texas Regional Mobility Authority, 0.0%, 1/1/25 (b) $ 3,959,173 3,000,000 BBB-/Baa2 Central Texas Regional Mobility Authority, 0.0%, 1/1/26 (b) 1,551,810 3,000,000 BBB-/Baa2 Central Texas Regional Mobility Authority, 0.0%, 1/1/27 (b) 1,452,930 2,500,000 BB+/Baa3 Central Texas Regional Mobility Authority, 6.75%, 1/1/41 2,731,850 8,285,000 AA+/Aa2 Dallas Area Rapid Transit, 5.25%, 12/1/29 9,631,892 The accompanying notes are an integral part of these financial statements. 26 Pioneer AMT-Free Municipal Fund | Semiannual Report | 6/30/13 -------------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (c) Ratings Amount ($) (unaudited) (unaudited) Value -------------------------------------------------------------------------------------------------------------- Texas -- (continued) 10,000,000 BBB+/A3 Dallas County Utility & Reclamation District, 5.375%, 2/15/29 $ 10,458,100 580,000 AA-/NR Eagle Mountain & Saginaw Independent School District, 3.375%, 8/15/32 495,987 1,000,000 NR/Baa3 Harris County Cultural Education Facilities Finance Corp., 5.0%, 6/1/28 1,035,580 1,000,000 NR/Baa3 Harris County Cultural Education Facilities Finance Corp., 5.0%, 6/1/33 1,003,070 390,000 AAA/Aaa Houston Higher Education Finance Corp., 5.0%, 5/15/40 417,596 2,000,000 A-/A2 North Texas Tollway Authority, 5.0%, 1/1/38 2,041,680 3,000,000 A+/A1 Richardson Hospital Authority, 6.0%, 12/1/34 3,049,980 1,000,000 BBB/NR Seguin Higher Education Facilities Corp., 5.0%, 9/1/23 (Pre-Refunded) 1,050,980 5,000,000 AA+/Aaa State of Texas, 5.0%, 8/1/27 5,647,800 4,000,000 BBB/A3 Texas Municipal Gas Acquisition & Supply Corp III, 5.0%, 12/15/31 3,976,080 10,410,000 NR/Baa3 Texas Private Activity Bond Surface Transportation Corp., 7.0%, 6/30/40 12,170,019 2,255,000 BBB/NR Texas State Public Finance Authority Charter School Finance Corp., 6.2%, 2/15/40 2,483,386 --------------- $ 63,157,913 -------------------------------------------------------------------------------------------------------------- Utah -- 0.2% 1,115,000 AA-/NR South Davis Recreational District, 4.0%, 1/1/24 $ 1,195,191 500,000 BBB-/NR Utah State Charter School Finance Authority, 5.75%, 7/15/20 526,270 --------------- $ 1,721,461 -------------------------------------------------------------------------------------------------------------- Vermont -- 0.1% 1,295,000 BBB-/Baa Vermont Educational & Health Buildings Financing Agency, 5.0%, 7/1/24 $ 1,194,689 -------------------------------------------------------------------------------------------------------------- Virginia -- 4.6% 5,000,000 A/Baa1 Chesapeake Bay Bridge & Tunnel District, 5.5%, 7/1/25 $ 5,452,750 1,500,000 NR/WR Prince William County Industrial Development Authority, 5.2%, 10/1/26 (Pre-Refunded) 1,548,240 3,925,000 NR/WR Prince William County Industrial Development Authority, 5.35%, 10/1/36 (Pre-Refunded) 4,052,759 13,990,000 B-/B2 Tobacco Settlement Financing Corp. Virginia, 5.0%, 6/1/47 10,035,027 The accompanying notes are an integral part of these financial statements. Pioneer AMT-Free Municipal Fund | Semiannual Report | 6/30/13 27 Schedule of Investments | 6/30/13 (unaudited) (continued) -------------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (c) Ratings Amount ($) (unaudited) (unaudited) Value -------------------------------------------------------------------------------------------------------------- Virginia -- (continued) 4,000,000 AAA/Aaa University of Virginia, 5.0%, 6/1/37 $ 4,393,680 5,000,000 AAA/Aaa University of Virginia, 5.0%, 6/1/43 5,431,750 7,500,000 BBB+/Baa1 Washington County Industrial Development Authority Virginia, 7.75%, 7/1/38 8,701,275 --------------- $ 39,615,481 -------------------------------------------------------------------------------------------------------------- Washington -- 8.2% 1,000,000 A+/NR City of Richland Washington Electric Revenue, 4.0%, 11/1/42 $ 870,260 10,000,000 AA+/Aa1 City of Seattle Washington, 4.0%, 9/1/37 9,580,300 10,000,000 AA/NR FYI Properties, 5.5%, 6/1/39 10,610,700 1,000,000 AA+/Aa1 King & Snohomish Counties School District No. 417 Northshore, 5.0%, 12/1/30 1,090,080 1,000,000 AA+/Aa1 King & Snohomish Counties School District No. 417 Northshore, 5.0%, 12/1/31 1,085,350 10,000,000 AAA/NR King County Housing Authority, 5.5%, 5/1/38 10,552,000 3,000,000 A/A2 King County Public Hospital District No. 1, 5.25%, 12/1/37 3,134,310 1,000,000 AA+/Aa1 Pierce County School District No. 3 Puyallup, 5.0%, 12/1/23 1,166,350 10,500,000 BBB/Baa1 Tobacco Settlement Authority of Washington, 6.625%, 6/1/32 10,629,990 5,600,000 AA+/Aaa University of Washington, 5.0%, 6/1/37 5,973,352 1,000,000 AA/Aa2 Washington Health Care Facilities Authority, 4.25%, 10/1/37 893,910 2,400,000 BBB/Baa2 Washington Health Care Facilities Authority, 6.125%, 8/15/37 2,519,544 4,000,000 NR/WR Washington Health Care Facilities Authority, 6.5%, 11/15/33 (Pre-Refunded) 4,337,600 5,000,000 5.25 AA/Aa2 Washington Health Care Facilities Authority, Floating Rate Note, 10/1/33 5,174,700 2,045,000 NR/NR Washington State Housing Finance Commission, 5.25%, 1/1/17 2,034,346 --------------- $ 69,652,792 -------------------------------------------------------------------------------------------------------------- Wisconsin -- 0.6% 1,430,000 NR/A1 Adams-Friendship Area School District, 6.5%, 4/1/16 $ 1,629,442 3,000,000 A+/NR Wisconsin Health & Educational Facilities Authority, 5.125%, 8/15/35 3,079,980 --------------- $ 4,709,422 -------------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 28 Pioneer AMT-Free Municipal Fund | Semiannual Report | 6/30/13 -------------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (c) Ratings Amount ($) (unaudited) (unaudited) Value -------------------------------------------------------------------------------------------------------------- Wyoming -- 0.1% 1,000,000 A+/NR County of Laramie Wyoming, 5.0%, 5/1/37 $ 1,001,220 -------------------------------------------------------------------------------------------------------------- TOTAL MUNICIPAL BONDS (Cost $820,863,988) $ 845,130,305 -------------------------------------------------------------------------------------------------------------- TOTAL INVESTMENT IN SECURITIES -- 99.1% (Cost $821,503,988) (a) $ 845,770,305 -------------------------------------------------------------------------------------------------------------- OTHER ASSETS & LIABILITIES -- 0.9% $ 7,856,793 -------------------------------------------------------------------------------------------------------------- TOTAL NET ASSETS -- 100.0% $ 853,627,098 ============================================================================================================== (Pre-Refunded) Pre-refunded bonds have been collateralized by U.S. Treasury securities which are held in escrow and used to pay principal and interest on the tax-exempt issue and to retire the bonds in full at the earliest refunding date. + Amount rounds to less than 0.1%. * Non-income producing security. NR Not rated by either S&P or Moody's. WR Withdrawn rating. (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 June 30, 2013, the value of these securities amounted to $640,000 or 0.1% of total net assets. (a) At June 30, 2013, the net unrealized gain on investments based on cost for federal income tax purposes of $819,005,222 was as follows: Aggregate gross unrealized gain for all investments in which there is an excess of value over tax cost $ 46,897,717 Aggregate gross unrealized loss for all investments in which there is an excess of tax cost over value (20,132,634) ------------ Net unrealized gain $ 26,765,083 ============ (b) Security is issued with a zero coupon. Income is earned through accretion of discount. (c) Debt obligation with a variable interest rate. Rate shown is rate at end of period. Various inputs are used in determining the value of the Fund's investments. These inputs are summarized in the three broad levels listed below. Level 1 - quoted prices in active markets for identical securities Level 2 - other significant observable inputs (including quoted prices for similar securities, interest rates, prepayment speeds, credit risk, etc.) See Notes to Financial Statements -- Note 1A. Level 3 - significant unobservable inputs (including the Fund's own assumptions in determining fair value of investments) See Notes to Financial Statements -- Note 1A. The accompanying notes are an integral part of these financial statements. Pioneer AMT-Free Municipal Fund | Semiannual Report | 6/30/13 29 Schedule of Investments | 6/30/13 (unaudited) (continued) 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) as Level 3. See Notes to Financial Statements -- Note 1A. The following is a summary of the inputs used as of June 30, 2013, in valuing the Fund's investments: -------------------------------------------------------------------------------- Level 1 Level 2 Level 3 Total -------------------------------------------------------------------------------- Common Stocks $ -- $ 640,000 $ -- $ 640,000 Municipal Bonds -- 845,130,305 -- 845,130,305 -------------------------------------------------------------------------------- Total $ -- $845,770,305 $ -- $845,770,305 ================================================================================ During the six months ended June 30, 2013, there were no transfers between Levels 1, 2 and 3. The accompanying notes are an integral part of these financial statements. 30 Pioneer AMT-Free Municipal Fund | Semiannual Report | 6/30/13 Statement of Assets and Liabilities | 6/30/13 (unaudited) ASSETS: Investment in securities (cost $821,503,988) $ 845,770,305 Receivables -- Fund share sold 379,835 Interest 11,463,573 Due from Pioneer Investment Management, Inc. 53,646 Prepaid expenses 50,803 ------------------------------------------------------------------------------- Total assets $ 857,718,162 =============================================================================== LIABILITIES: Payables -- Fund shares repurchased $ 1,903,238 Dividends 841,776 Due to custodian 629,453 Due to affiliates 655,223 Accrued expenses 61,374 ------------------------------------------------------------------------------- Total liabilities $ 4,091,064 =============================================================================== NET ASSETS: Paid-in capital $ 936,214,179 Undistributed net investment income 11,274,940 Accumulated net realized loss on investments (118,128,338) Net unrealized appreciation on investments 24,266,317 ------------------------------------------------------------------------------- Total net assets $ 853,627,098 =============================================================================== NET ASSET VALUE PER SHARE: (No par value, unlimited number of shares authorized) Class A (Based on $736,314,446/53,745,550 shares) $ 13.70 Class B (Based on $2,511,164/184,933 shares) $ 13.58 Class C (Based on $43,456,385/3,198,135 shares) $ 13.59 Class Y (Based on $71,345,103/5,224,586 shares) $ 13.66 MAXIMUM OFFERING PRICE: Class A ($13.70 (divided by) 95.5%) $ 14.35 =============================================================================== The accompanying notes are an integral part of these financial statements. Pioneer AMT-Free Municipal Fund | Semiannual Report | 6/30/13 31 Statement of Operations (unaudited) For the Six Months Ended 6/30/13 INVESTMENT INCOME: Interest $ 22,349,404 ----------------------------------------------------------------------------------------------- Total investment income $ 22,349,404 =============================================================================================== EXPENSES: Management fees $ 2,117,079 Transfer agent fees Class A 128,354 Class B 1,712 Class C 3,605 Class Y 950 Distribution fees Class A 1,001,669 Class B 15,394 Class C 229,408 Shareholder communication expense 173,377 Administrative reimbursements 137,486 Custodian fees 6,306 Registration fees 37,836 Professional fees 33,247 Printing expense 7,270 Fees and expenses of nonaffiliated trustees 17,370 Miscellaneous 51,809 ----------------------------------------------------------------------------------------------- Total expenses $ 3,962,872 Less fees waived and expenses reimbursed by Pioneer Investment Management, Inc. $ (58,092) ----------------------------------------------------------------------------------------------- Net expenses $ 3,904,780 ----------------------------------------------------------------------------------------------- Net investment income $ 18,444,624 ----------------------------------------------------------------------------------------------- REALIZED AND UNREALIZED GAIN (LOSS) ON INVESTMENTS: Net realized gain on Investments $ 8,106,528 ----------------------------------------------------------------------------------------------- Change in net unrealized depreciation on Investments $ (63,481,462) ----------------------------------------------------------------------------------------------- Net loss on investments $ (55,374,934) ----------------------------------------------------------------------------------------------- Net decrease in net assets resulting from operations $ (36,930,310) =============================================================================================== The accompanying notes are an integral part of these financial statements. 32 Pioneer AMT-Free Municipal Fund | Semiannual Report | 6/30/13 Statements of Changes in Net Assets ----------------------------------------------------------------------------------------- Six Months Ended Year 6/30/13 Ended (unaudited) 12/31/12 ----------------------------------------------------------------------------------------- FROM OPERATIONS: Net investment income $ 18,444,624 $ 39,977,490 Net realized gain on investments 8,106,528 3,042,934 Change in net unrealized appreciation (depreciation) on investments (63,481,462) 67,864,836 ----------------------------------------------------------------------------------------- Net increase (decrease) in net assets resulting from operations $ (36,930,310) $ 110,885,260 ----------------------------------------------------------------------------------------- DISTRIBUTIONS TO SHAREOWNERS: Net investment income: Class A ($0.27 and $0.54 per share, respectively) $ (14,955,872) $ (30,629,957) Class B ($0.20 and $0.41 per share, respectively) (43,194) (113,799) Class C ($0.21 and $0.43 per share, respectively) (681,566) (1,291,975) Class Y ($0.28 and $0.58 per share, respectively) (1,686,795) (3,102,624) ----------------------------------------------------------------------------------------- Total distributions to shareowner $ (17,367,427) $ (35,138,355) ----------------------------------------------------------------------------------------- FROM FUND SHARE TRANSACTIONS: Net proceeds from sale or exchange of shares $ 40,962,991 $ 137,410,078 Reinvestment of distributions 13,329,228 25,159,398 Cost of shares repurchased (105,403,102) (154,665,212) ----------------------------------------------------------------------------------------- Net increase (decrease) in net assets resulting from Fund share transactions $ (51,110,883) $ 7,904,264 ----------------------------------------------------------------------------------------- Net increase (decrease) in net assets $ (105,408,620) $ 83,651,169 NET ASSETS: Beginning of period 959,035,718 875,384,549 ----------------------------------------------------------------------------------------- End of period $ 853,627,098 $ 959,035,718 ========================================================================================= Undistributed net investment income $ 11,274,940 $ 10,197,743 ========================================================================================= The accompanying notes are an integral part of these financial statements. Pioneer AMT-Free Municipal Fund | Semiannual Report | 6/30/13 33 Statement of Changes in Net Assets (continued) ----------------------------------------------------------------------------------------------- '13 Shares '13 Amount (Unaudited) (Unaudited) '12 Shares '12 Amount ----------------------------------------------------------------------------------------------- Class A Shares sold 1,502,579 $ 21,018,229 6,693,162 $ 95,002,400 Reinvestment of distributions 793,793 11,449,349 1,605,264 22,792,630 Less shares repurchased (5,140,084) (73,483,364) (8,972,023) (127,141,766) ----------------------------------------------------------------------------------------------- Net decrease (2,843,712) $ (41,015,786) (673,597) $ (9,346,736) =============================================================================================== Class B Shares sold or exchanged 404 $ 5,793 9,465 $ 134,342 Reinvestment of distributions 2,178 31,239 6,595 92,776 Less shares repurchased (53,956) (706,764) (107,780) (1,580,836) ----------------------------------------------------------------------------------------------- Net decrease (51,374) $ (669,732) (91,720) $ (1,353,718) =============================================================================================== Class C Shares sold 440,595 $ 6,196,514 884,256 $ 12,595,623 Reinvestment of distributions 35,917 513,394 67,268 947,915 Less shares repurchased (401,111) (5,691,743) (675,470) (9,501,376) ----------------------------------------------------------------------------------------------- Net increase 75,401 $ 1,018,165 276,054 $ 4,042,162 =============================================================================================== Class Y Shares sold 960,038 $ 13,742,455 2,075,350 $ 29,677,713 Reinvestment of distributions 92,723 1,335,246 92,847 1,326,077 Less shares repurchased (1,769,531) (25,521,231) (1,156,404) (16,441,234) ----------------------------------------------------------------------------------------------- Net increase (decrease) (716,770) $ (10,443,530) 1,011,793 $ 14,562,556 =============================================================================================== The accompanying notes are an integral part of these financial statements. 34 Pioneer AMT-Free Municipal Fund | Semiannual Report | 6/30/13 Financial Highlights ------------------------------------------------------------------------------------------------------------------------------------ Six Months Ended Year Year Year Year Year 6/30/13 Ended Ended Ended Ended Ended (Unaudited) 12/31/12 12/31/11 12/31/10 12/31/09 12/31/08 ------------------------------------------------------------------------------------------------------------------------------------ Class A Net asset value, beginning of period $ 14.56 $ 13.40 $ 12.56 $ 12.86 $ 10.90 $ 13.50 ------------------------------------------------------------------------------------------------------------------------------------ Increase (decrease) from investment operations: Net investment income $ 0.29 $ 0.61 $ 0.62 $ 0.57 $ 0.59 $ 0.60 Net realized and unrealized gain (loss) on investments (0.88) 1.09 0.82 (0.28) 1.99 (2.54) ------------------------------------------------------------------------------------------------------------------------------------ Net increase (decrease) from investment operations $ (0.59) $ 1.70 $ 1.44 $ 0.29 $ 2.58 $ (1.94) ------------------------------------------------------------------------------------------------------------------------------------ Distributions to shareowners: Net investment income (0.27) (0.54) (0.60) (0.59) (0.61) (0.59) Net realized gain -- -- -- -- (0.01) (0.07) ------------------------------------------------------------------------------------------------------------------------------------ Net increase (decrease) in net asset value $ (0.86) $ 1.16 $ 0.84 $ (0.30) $ 1.96 $ (2.60) ------------------------------------------------------------------------------------------------------------------------------------ Net asset value, end of period $ 13.70 $ 14.56 $ 13.40 $ 12.56 $ 12.86 $ 10.90 ==================================================================================================================================== Total return* (4.16)% 12.87%(a) 11.73% 2.15% 24.01% (14.85)% Ratio of net expenses to average net assets+ 0.82%** 0.82% 0.82% 0.82% 0.82% 0.82% Ratio of net investment income to average net assets+ 3.96%** 4.35% 4.77% 4.55% 4.94% 4.66% Portfolio turnover rate 18%** 17% 14% 18% 18% 27% Net assets, end of period (in thousands) $736,315 $824,216 $767,290 $749,235 $479,599 $353,257 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Total expenses 0.83%** 0.83% 0.87% 0.85% 0.88% 0.88% Net investment income 3.96%** 4.33% 4.72% 4.52% 4.88% 4.60% Ratios with waiver of fees and assumption of expenses by the Adviser and reduction for fees paid indirectly: Net expenses 0.82%** 0.82% 0.82% 0.82% 0.82% 0.82% Net investment income 3.96%** 4.35% 4.77% 4.55% 4.94% 4.66% ==================================================================================================================================== (a) If the Fund had not recognized gains in settlement of class action lawsuits during the year ended December 31, 2012, the total return would have been 12.64%. * Assumes initial investment at net asset value at the beginning of each period, reinvestment of all distributions and the complete redemption of the investment at net asset value at the end of each period and no sales charges'. Total return would be reduced if sales charges were taken into account. ** Annualized. + Ratios assuming no reduction for fees paid indirectly. The accompanying notes are an integral part of these financial statements. Pioneer AMT-Free Municipal Fund | Semiannual Report | 6/30/13 35 Financial Highlights (continued) ---------------------------------------------------------------------------------------------------------------------------- Six Months Ended Year Year Year Year Year 6/30/13 Ended Ended Ended Ended Ended (Unaudited) 12/31/12 12/31/11 12/31/10 12/31/09 12/31/08 ---------------------------------------------------------------------------------------------------------------------------- Class B Net asset value, beginning of period $ 14.46 $13.30 $12.48 $ 12.78 $10.83 $ 13.41 ---------------------------------------------------------------------------------------------------------------------------- Increase (decrease) from investment operations: Net investment income $ 0.26 $ 0.52 $ 0.55 $ 0.46 $ 0.50 $ 0.48 Net realized and unrealized gain (loss) on investments (0.94) 1.05 0.75 (0.29) 1.96 (2.52) ---------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) from investment operations $ (0.68) $ 1.57 $ 1.30 $ 0.17 $ 2.46 $ (2.04) ---------------------------------------------------------------------------------------------------------------------------- Distributions to shareowners: Net investment income (0.20) (0.41) (0.48) (0.47) (0.50) (0.47) Net realized gain -- -- -- -- (0.01) (0.07) ---------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) in net asset value $ (0.88) $ 1.16 $ 0.82 $ (0.30) $ 1.95 $ (2.58) ---------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $ 13.58 $14.46 $13.30 $ 12.48 $12.78 $ 10.83 ============================================================================================================================ Total return* (4.77)% 11.94%(a) 10.63% 1.25% 22.97% (15.60)% Ratio of net expenses to average net assets+ 1.72%** 1.72% 1.72% 1.68% 1.71% 1.72% Ratio of net investment income to average net assets+ 3.05%** 3.46% 3.93% 3.68% 4.06% 3.76% Portfolio turnover rate 18%** 17% 14% 18% 18% 27% Net assets, end of period (in thousands) $ 2,511 $3,418 $4,364 $ 8,169 $5,838 $ 5,286 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Total expenses 1.74%** 1.75% 1.74% 1.68% 1.71% 1.72% Net investment income 3.03%** 3.43% 3.90% 3.68% 4.06% 3.76% Ratios with waiver of fees and assumption of expenses by the Adviser and reduction for fees paid indirectly: Net expenses 1.72%** 1.72% 1.72% 1.68% 1.71% 1.72% Net investment income 3.05%** 3.46% 3.93% 3.68% 4.06% 3.76% ============================================================================================================================ (a) If the Fund had not recognized gains in settlement of class action lawsuits during the year ended December 31, 2012, the total return would have been 11.81%. * Assumes initial investment at net asset value at the beginning of each period, reinvestment of all distributions and the complete redemption of the investment at net asset value at the end of each period and no sales charges'. Total return would be reduced if sales charges were taken into account. ** Annualized. + Ratios assuming no reduction for fees paid indirectly. The accompanying notes are an integral part of these financial statements. 36 Pioneer AMT-Free Municipal Fund | Semiannual Report | 6/30/13 ------------------------------------------------------------------------------------------------------------------------------- Six Months Ended Year Year Year Year Year 6/30/13 Ended Ended Ended Ended Ended (Unaudited) 12/31/12 12/31/11 12/31/10 12/31/09 12/31/08 ------------------------------------------------------------------------------------------------------------------------------- Class C Net asset value, beginning of period $ 14.44 $ 13.29 $ 12.46 $ 12.77 $ 10.83 $ 13.42 ------------------------------------------------------------------------------------------------------------------------------- Increase (decrease) from investment operations: Net investment income $ 0.22 $ 0.49 $ 0.51 $ 0.47 $ 0.47 $ 0.45 Net realized and unrealized gain (loss) on investments (0.86) 1.09 0.81 (0.30) 1.98 (2.48) ------------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) from investment operations $ (0.64) $ 1.58 $ 1.32 $ 0.17 $ 2.45 $ (2.03) ------------------------------------------------------------------------------------------------------------------------------- Distributions to shareowners: Net investment income (0.21) (0.43) (0.49) (0.48) (0.50) (0.49) Net realized gain -- -- -- -- (0.01) (0.07) ------------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) in net asset value $ (0.85) $ 1.15 $ 0.83 $ (0.31) $ 1.94 $ (2.59) ------------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $ 13.59 $ 14.44 $ 13.29 $ 12.46 $ 12.77 $ 10.83 =============================================================================================================================== Total return* (4.50)% 12.03%(a) 10.84% 1.26% 22.93% (15.56)% Ratio of net expenses to average net assets+ 1.57%** 1.58% 1.61% 1.60% 1.64% 1.65% Ratio of net investment income to average net assets+ 3.21%** 3.58% 3.98% 3.78% 4.08% 3.85% Portfolio turnover rate 18%** 17% 14% 18% 18% 27% Net assets, end of period (in thousands) $43,456 $45,106 $37,834 $38,548 $26,422 $15,157 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Total expenses 1.57%** 1.58% 1.61% 1.60% 1.64% 1.65% Net investment income 3.21%** 3.58% 3.98% 3.78% 4.08% 3.85% Ratios with waiver of fees and assumption of expenses by the Adviser and reduction for fees paid indirectly: Net expenses 1.57%** 1.58% 1.61% 1.60% 1.64% 1.65% Net investment income 3.21%** 3.58% 3.98% 3.78% 4.08% 3.85% =============================================================================================================================== (a) If the Fund had not recognized gains in settlement of class action lawsuits during the year ended December 31, 2012, the total return would have been 11.87%. * Assumes initial investment at net asset value at the beginning of each period, reinvestment of all distributions and the complete redemption of the investment at net asset value at the end of each period and no sales charges'. Total return would be reduced if sales charges were taken into account. ** Annualized. + Ratios assuming no reduction for fees paid indirectly. The accompanying notes are an integral part of these financial statements. Pioneer AMT-Free Municipal Fund | Semiannual Report | 6/30/13 37 Financial Highlights (continued) ------------------------------------------------------------------------------------------------------------------------------- Six Months Ended Year Year Year Year Year 6/30/13 Ended Ended Ended Ended Ended (Unaudited) 12/31/12 12/31/11 12/31/10 12/31/09 12/31/08 ------------------------------------------------------------------------------------------------------------------------------- Class Y Net asset value, beginning of period $ 14.52 $ 13.37 $ 12.53 $ 12.84 $ 10.89 $ 13.48 ------------------------------------------------------------------------------------------------------------------------------- Increase (decrease) from investment operations: Net investment income $ 0.32 $ 0.63 $ 0.67 $ 0.58 $ 0.63 $ 0.62 Net realized and unrealized gain (loss) on investments (0.90) 1.10 0.80 (0.26) 1.96 (2.51) ------------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) from investment operations $ (0.58) $ 1.73 $ 1.47 $ 0.32 $ 2.59 $ (1.89) ------------------------------------------------------------------------------------------------------------------------------- Distributions to shareowners: Net investment income (0.28) (0.58) (0.63) (0.63) (0.63) (0.63) Net realized gain -- -- -- -- (0.01) (0.07) ------------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) in net asset value $ (0.86) $ 1.15 $ 0.84 $ (0.31) $ 1.95 $ (2.59) ------------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $ 13.66 $ 14.52 $ 13.37 $ 12.53 $ 12.84 $ 10.89 =============================================================================================================================== Total return* (4.04)% 13.12%(a) 12.04% 2.34% 24.22% (14.56)% Ratio of net expenses to average net assets+ 0.55%** 0.55% 0.55% 0.55% 0.58% 0.58% Ratio of net investment income to average net assets+ 4.23%** 4.60% 5.04% 4.81% 5.17% 4.90% Portfolio turnover rate 18%** 17% 14% 18% 18% 27% Net assets, end of period (in thousands) $71,345 $86,296 $65,896 $76,959 $21,963 $18,571 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Total expenses 0.63%** 0.58% 0.57% 0.55% 0.58% 0.58% Net investment income 4.15%** 4.57% 5.02% 4.80% 5.17% 4.90% Ratios with waiver of fees and assumption of expenses by the Adviser and reduction for fees paid indirectly: Net expenses 0.55%** 0.55% 0.55% 0.55% 0.58% 0.58% Net investment income 4.23%** 4.60% 5.04% 4.81% 5.17% 4.90% =============================================================================================================================== (a) If the Fund had not recognized gains in settlement of class action lawsuits during the year ended December 31, 2012, the total return would have been 12.85%. * Assumes initial investment at net asset value at the beginning of each period, reinvestment of all distributions and the complete redemption of the investment at net asset value at the end of each period. ** Annualized. + Ratios assuming no reduction for fees paid indirectly. The accompanying notes are an integral part of these financial statements. 38 Pioneer AMT-Free Municipal Fund | Semiannual Report | 6/30/13 Notes to Financial Statements | 6/30/13 (unaudited) 1. Organization and Significant Accounting Policies Pioneer AMT-Free Municipal Fund (the Fund) is one of two series comprising Pioneer Series Trust II, a Delaware statutory trust. The Fund is registered under the Investment Company Act of 1940 as a diversified, open-end management investment company. The investment objective of the Fund is to seek a high level of current income exempt from federal income tax as is consistent with the relative stability of capital. The Fund offers four classes of shares designated as Class A, Class B, Class C and Class Y shares. Effective as of the close of business on December 31, 2009, Class B shares are no longer offered to new or existing shareholders, except that dividends and/or capital gain distributions may continue to be reinvested in Class B shares, and shareholders may exchange their Class B shares for Class B shares of other Pioneer funds, as permitted by existing exchange privileges. Each class of shares represents an interest in the same portfolio of investments of the Fund and has identical rights (based on relative net asset values) to assets and liquidation proceeds. Share classes can bear different rates of class-specific fees and expenses such as transfer agent and distribution fees. Differences in class-specific fees and expenses will result in differences in net investment income and, therefore, the payment of different dividends from net investment income earned by each class. The Amended and Restated Declaration of Trust of the Fund gives the Board the flexibility to specify either per share voting or dollar-weighted voting when submitting matters for shareholder approval. Under per share voting, each share of a class of the Fund is entitled to one vote. Under dollar-weighted voting, a shareholder's voting power is determined not by the number of shares owned, but by the dollar value of the shares on the record date. Each share class has exclusive voting rights with respect to matters affecting only that class, including with respect to the distribution plan for that class. There is no distribution plan for Class Y shares. Class B shares convert to Class A shares approximately eight years after the date of purchase. The Fund's financial statements have been prepared in conformity with U.S. generally accepted accounting principles that require the management of the Fund to, among other things, make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of income, expenses, and gain or loss on investments during the reporting period. Actual results could differ from those estimates. Pioneer AMT-Free Municipal Fund | Semiannual Report | 6/30/13 39 The following is a summary of significant accounting policies followed by the Fund in the preparation of its financial statements, which are consistent with those policies generally accepted in the investment company industry: A. Security Valuation Security transactions are recorded as of trade date. The net asset value of the Fund is computed once daily, on each day the New York Stock Exchange (NYSE) is open, as of the close of regular trading on the NYSE. Fixed income securities with remaining maturity of more than sixty days 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. Equity securities that have traded on an exchange are valued at the last sale price on the principal exchange where they are traded. Equity securities that have not traded on the date of valuation, or securities for which sale prices are not available, generally are valued using the mean between the last bid and asked prices. Short-term fixed income securities with remaining maturities of sixty days or less generally are valued at amortized cost. Shares of money market mutual funds are valued at such Funds' net asset value. 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 or at the direction or with the approval of the Valuation Committee using fair value methods pursuant to procedures adopted by the Board of Trustees. The Valuation Committee is comprised of certain members of the Board of Trustees. The Fund may use fair value methods if it is determined that a significant event has occurred after the close of the exchange or market on which the security trades and prior to the determination of the Fund's net asset value. Examples of a significant event might include political or economic news, corporate restructurings, natural disasters, terrorist activity or trading halts. Thus, the valuation of the Fund's securities may differ significantly from exchange prices and such differences could be material. Pioneer Investment Management, Inc. (PIM) 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. At June 30, 2013, no securities were valued using fair value methods (other than securities valued using prices supplied by independent pricing services). 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. 40 Pioneer AMT-Free Municipal Fund | Semiannual Report | 6/30/13 Discount and premium on debt securities are accreted or amortized, respectively, daily into interest income on a yield-to-maturity basis over the life of the respective security with a corresponding increase or decrease in the cost basis of the security. 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. B. 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 June 30, 2013, the Fund did not have any interest and penalties related to uncertain tax positions, which, if applicable, would be recorded as an income tax expense in the Statement of Operations. Tax years for the prior three fiscal 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. The tax character of current year distributions payable will be determined at the end of the current taxable year. The tax character of distributions paid during the years ended December 31, 2012 was as follows: ---------------------------------------------------------------------------- 2012 ---------------------------------------------------------------------------- Distributions paid from: Ordinary income $ 3,293,392 Tax-exempt income 31,844,963 ---------------------------------------------------------------------------- Total $35,138,355 ============================================================================ Pioneer AMT-Free Municipal Fund | Semiannual Report | 6/30/13 41 The following shows the components of distributable earnings on a federal income tax basis at December 31, 2012: ---------------------------------------------------------------------------- 2012 ---------------------------------------------------------------------------- Distributable earnings: Undistributed tax-exempt income $ 7,698,977 Capital loss carryforward (126,234,866) Net unrealized gain 90,246,545 ---------------------------------------------------------------------------- Total $ (28,289,344) ============================================================================ The difference between book-basis and tax-basis appreciation is attributable to the tax treatment of premium and amortization. C. 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 $27,592 in underwriting commissions on the sale of Class A shares during the six months ended June 30, 2013. D. Class Allocations Income, common expenses and realized and unrealized gains and losses are calculated at the Fund level and allocated daily to each class of shares based on its respective percentage of adjusted net assets at the beginning of the day. Distribution fees are calculated based on the average daily net asset value attributable to Class A, Class B 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). The Fund declares as daily dividends substantially all of its net investment income. All dividends are paid on a monthly basis. Short-term capital gain distributions, if any, may be declared with the daily dividends. Distributions to shareowners are recorded as of the ex-dividend date. Distributions paid by the Fund with respect to each class of shares are calculated in the same manner and at the same time, except that net investment income dividends to Class A, Class B, Class C and Class Y shares can reflect different transfer agent and distribution expense rates. 42 Pioneer AMT-Free Municipal Fund | Semiannual Report | 6/30/13 E. Risks At times, the Fund's investments may represent industries or industry sectors that are interrelated or have common risks, making the Fund more susceptible to any economic, political, or regulatory developments or other risks affecting those industries and sectors. The Fund's prospectus contains unaudited information regarding the Fund's principal risks. Please refer to that document when considering the Fund's principal risks. 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 $250 million; 0.45% of the next $500 million; and 0.40% of the excess over $750 million. For the six months ended June 30, 2013, the effective management fee (excluding waivers and/or assumption of expenses) was equivalent to 0.45% of the Fund's average daily net assets. PIM has contractually agreed to limit ordinary operating expenses of the Fund to the extent required to reduce Fund expenses to 0.82%, 1.72%, 1.72% and 0.55% of the average daily net assets attributable to Class A, Class B, Class C and Class Y shares, respectively. Fees waived and expenses reimbursed during the six months ended June 30, 2013 are reflected on the Statement of Operations. These expense limitations are in effect through May 1, 2014. There can be no assurance that PIM will extend the expense limit agreement for a class of shares beyond the date referred to above. In addition, under the management and administration agreements, certain other services and costs, including accounting, regulatory reporting and insurance premiums, are paid by the Fund as administrative reimbursements. Included in "Due to affiliates" reflected on the Statement of Assets and Liabilities is $384,296 in management fees, administrative costs and certain other reimbursements payable to PIM at June 30, 2013. 3. Transfer Agent PIMSS, a wholly owned indirect subsidiary of UniCredit, provides substantially all transfer agent and shareowner services to the Fund at negotiated rates. In addition, the Fund reimburses PIMSS for out-of-pocket expenses incurred by PIMSS related to shareholder communications activities such as proxy and statement mailings, outgoing phone calls and omnibus relationship contracts. Pioneer AMT-Free Municipal Fund | Semiannual Report | 6/30/13 43 For the six months ended June 30, 2013, such out-of-pocket expenses by class of shares were as follows: -------------------------------------------------------------------------------- Shareholder Communications: -------------------------------------------------------------------------------- Class A $116,071 Class B 1,759 Class C 9,875 Class Y 45,672 -------------------------------------------------------------------------------- Total $173,377 ================================================================================ Included in "Due to affiliates" reflected on the Statement of Assets and Liabilities is $60,724 in transfer agent fees and out-of-pocket reimbursements payable to PIMSS at June 30, 2013. 4. Distribution Plan The Fund has adopted a Distribution Plan pursuant to Rule 12b-1 of the Investment Company Act of 1940 with respect to its Class A, Class B 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 B and Class C shares. The fee for Class B and 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 B and Class C shares. Included in "Due to affiliates" reflected on the Statement of Assets and Liabilities is $210,203 in distribution fees payable to PFD at June 30, 2013. 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. Class B shares that are redeemed within five years of purchase are subject to a CDSC at declining rates beginning at 4.00%, based on the lower of cost or market value of shares being redeemed. 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 six months ended June 30, 2013, CDSCs in the amount of $23,406 were paid to PFD. 44 Pioneer AMT-Free Municipal Fund | Semiannual Report | 6/30/13 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 six months ended June 30, 2013, the Fund's expenses were not reduced under such arrangements. 6. Line of Credit Facility The Fund, along with certain other funds in the Pioneer Family of Funds (the Funds), participates in a committed, unsecured revolving line of credit facility. Borrowings are used solely for temporary or emergency purposes. The Fund may borrow up to the lesser of the amount available under the facility or the limits set for borrowing by the Fund's prospectus and the 1940 Act. The credit facility in effect as of February 15, 2012 is in the amount of $215 million. Under such facility, depending on the type of loan, interest on borrowings is payable at the London Interbank Offered Rate(LIBOR) plus 0.90% on an annualized basis, or the Alternate Base Rate, which is the greater of (a) the facility's administrative agent's daily announced prime rate on the borrowing date, (b) 2% plus the Federal Funds Rate on the borrowing date and (c) 2% plus the overnight Euro dollar rate on the borrowing date. The Funds pay an annual commitment fee to participate in a credit facility. The commitment fee is allocated among participating Funds based on an allocation schedule set forth in the credit agreement. For the six months ended June 30, 2013, the Fund had no borrowings under the credit facility. Pioneer AMT-Free Municipal Fund | Semiannual Report | 6/30/13 45 Trustees, Officers and Service Providers Trustees Officers Thomas J. Perna, Chairman John F. Cogan, Jr., President* David R. Bock Daniel K. Kingsbury, Executive John F. Cogan, Jr. Vice President Benjamin M. Friedman Mark E. Bradley, Treasurer** Margaret B.W. Graham Christopher J. Kelley, Secretary Daniel K. Kingsbury Marguerite A. Piret Stephen K. West Investment Adviser and Administrator Pioneer Investment Management, Inc. Custodian and Sub-Administrator Brown Brothers Harriman & Co. Principal Underwriter Pioneer Funds Distributor, Inc. Legal Counsel Bingham McCutchen 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 http://www.sec.gov. * Chief Executive Officer of the Fund. ** Chief Financial and Accounting Officer of the Fund. 46 Pioneer AMT-Free Municipal Fund | Semiannual Report | 6/30/13 This page for your notes. Pioneer AMT-Free Municipal Fund | Semiannual Report | 6/30/13 47 This page for your notes. 48 Pioneer AMT-Free Municipal Fund | Semiannual Report | 6/30/13 This page for your notes. Pioneer AMT-Free Municipal Fund | Semiannual Report | 6/30/13 49 This page for your notes. 50 Pioneer AMT-Free Municipal Fund | Semiannual Report | 6/30/13 This page for your notes. Pioneer AMT-Free Municipal Fund | Semiannual Report | 6/30/13 51 This page for your notes. 52 Pioneer AMT-Free Municipal Fund | Semiannual Report | 6/30/13 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) 2013 Pioneer Investments 19451-07-0813 ITEM 2. CODE OF ETHICS. (a) Disclose whether, as of the end of the period covered by the report, the registrant has adopted a code of ethics that applies to the registrant's principal executive officer, principal financial officer, principal accounting officer or controller, or persons performing similar functions, regardless of whether these individuals are employed by the registrant or a third party. If the registrant has not adopted such a code of ethics, explain why it has not done so. The registrant has adopted, as of the end of the period covered by this report, a code of ethics that applies to the registrant's principal executive officer, principal financial officer, principal accounting officer and controller. (b) For purposes of this Item, the term "code of ethics" means written standards that are reasonably designed to deter wrongdoing and to promote: (1) Honest and ethical conduct, including the ethical handling of actual or apparent conflicts of interest between personal and professional relationships; (2) Full, fair, accurate, timely, and understandable disclosure in reports and documents that a registrant files with, or submits to, the Commission and in other public communications made by the registrant; (3) Compliance with applicable governmental laws, rules, and regulations; (4) The prompt internal reporting of violations of the code to an appropriate person or persons identified in the code; and (5) Accountability for adherence to the code. (c) The registrant must briefly describe the nature of any amendment, during the period covered by the report, to a provision of its code of ethics that applies to the registrant's principal executive officer, principal financial officer, principal accounting officer or controller, or persons performing similar functions, regardless of whether these individuals are employed by the registrant or a third party, and that relates to any element of the code of ethics definition enumerated in paragraph (b) of this Item. The registrant must file a copy of any such amendment as an exhibit pursuant to Item 10(a), unless the registrant has elected to satisfy paragraph (f) of this Item by posting its code of ethics on its website pursuant to paragraph (f)(2) of this Item, or by undertaking to provide its code of ethics to any person without charge, upon request, pursuant to paragraph (f)(3) of this Item. The registrant has made no amendments to the code of ethics during the period covered by this report. (d) If the registrant has, during the period covered by the report, granted a waiver, including an implicit waiver, from a provision of the code of ethics to the registrant's principal executive officer, principal financial officer, principal accounting officer or controller, or persons performing similar functions, regardless of whether these individuals are employed by the registrant or a third party, that relates to one or more of the items set forth in paragraph (b) of this Item, the registrant must briefly describe the nature of the waiver, the name of the person to whom the waiver was granted, and the date of the waiver. Not applicable. (e) If the registrant intends to satisfy the disclosure requirement under paragraph (c) or (d) of this Item regarding an amendment to, or a waiver from, a provision of its code of ethics that applies to the registrant's principal executive officer, principal financial officer, principal accounting officer or controller, or persons performing similar functions and that relates to any element of the code of ethics definition enumerated in paragraph (b) of this Item by posting such information on its Internet website, disclose the registrant's Internet address and such intention. Not applicable. (f) The registrant must: (1) File with the Commission, pursuant to Item 10(a), a copy of its code of ethics that applies to the registrant's principal executive officer, principal financial officer, principal accounting officer or controller, or persons performing similar functions, as an exhibit to its annual report on this Form N-CSR (see attachment); (2) Post the text of such code of ethics on its Internet website and disclose, in its most recent report on this Form N-CSR, its Internet address and the fact that it has posted such code of ethics on its Internet website; or (3) Undertake in its most recent report on this Form N-CSR to provide to any person without charge, upon request, a copy of such code of ethics and explain the manner in which such request may be made. 	See Item 10(2) ITEM 3. AUDIT COMMITTEE FINANCIAL EXPERT. (a) (1) Disclose that the registrant's board of trustees has determined that the registrant either: (i) Has at least one audit committee financial expert serving on its audit committee; or (ii) Does not have an audit committee financial expert serving on its audit committee. The registrant's Board of Trustees has determined that the registrant has at least one audit committee financial expert. (2) If the registrant provides the disclosure required by paragraph (a)(1)(i) of this Item, it must disclose the name of the audit committee financial expert and whether that person is "independent." In order to be considered "independent" for purposes of this Item, a member of an audit committee may not, other than in his or her capacity as a member of the audit committee, the board of trustees, or any other board committee: (i) Accept directly or indirectly any consulting, advisory, or other compensatory fee from the issuer; or (ii) Be an "interested person" of the investment company as defined in Section 2(a)(19) of the Act (15 U.S.C. 80a-2(a)(19)). Ms. Marguerite A. Piret, an independent trustee, is such an audit committee financial expert. (3) If the registrant provides the disclosure required by paragraph (a)(1) (ii) of this Item, it must explain why it does not have an audit committee financial expert. Not applicable. ITEM 4. PRINCIPAL ACCOUNTANT FEES AND SERVICES. (a) Disclose, under the caption AUDIT FEES, the aggregate fees billed for each of the last two fiscal years for professional services rendered by the principal accountant for the audit of the registrant's annual financial statements or services that are normally provided by the accountant in connection with statutory and regulatory filings or engagements for those fiscal years. N/A (b) Disclose, under the caption AUDIT-RELATED FEES, the aggregate fees billed in each of the last two fiscal years for assurance and related services by the principal accountant that are reasonably related to the performance of the audit of the registrant's financial statements and are not reported under paragraph (a) of this Item. Registrants shall describe the nature of the services comprising the fees disclosed under this category. N/A (c) Disclose, under the caption TAX FEES, the aggregate fees billed in each of the last two fiscal years for professional services rendered by the principal accountant for tax compliance, tax advice, and tax planning. Registrants shall describe the nature of the services comprising the fees disclosed under this category. N/A (d) Disclose, under the caption ALL OTHER FEES, the aggregate fees billed in each of the last two fiscal years for products and services provided by the principal accountant, other than the services reported in paragraphs (a) through (c) of this Item. Registrants shall describe the nature of the services comprising the fees disclosed under this category. N/A (e) (1) Disclose the audit committee's pre-approval policies and procedures described in paragraph (c)(7) of Rule 2-01 of Regulation S-X. PIONEER FUNDS APPROVAL OF AUDIT, AUDIT-RELATED, TAX AND OTHER SERVICES PROVIDED BY THE INDEPENDENT AUDITOR SECTION I - POLICY PURPOSE AND APPLICABILITY The Pioneer Funds recognize the importance of maintaining the independence of their outside auditors. Maintaining independence is a shared responsibility involving Pioneer Investment Management, Inc ("PIM"), the audit committee and the independent auditors. The Funds recognize that a Fund's independent auditors: 1) possess knowledge of the Funds, 2) are able to incorporate certain services into the scope of the audit, thereby avoiding redundant work, cost and disruption of Fund personnel and processes, and 3) have expertise that has value to the Funds. As a result, there are situations where it is desirable to use the Fund's independent auditors for services in addition to the annual audit and where the potential for conflicts of interests are minimal. Consequently, this policy, which is intended to comply with Rule 210.2-01(C)(7), sets forth guidelines and procedures to be followed by the Funds when retaining the independent audit firm to perform audit, audit-related tax and other services under those circumstances, while also maintaining independence. Approval of a service in accordance with this policy for a Fund shall also constitute approval for any other Fund whose pre-approval is required pursuant to Rule 210.2-01(c)(7)(ii). In addition to the procedures set forth in this policy, any non-audit services that may be provided consistently with Rule 210.2-01 may be approved by the Audit Committee itself and any pre-approval that may be waived in accordance with Rule 210.2-01(c)(7)(i)(C) is hereby waived. Selection of a Fund's independent auditors and their compensation shall be determined by the Audit Committee and shall not be subject to this policy. SECTION II - POLICY ---------------- -------------------------------- ------------------------------------------------- SERVICE SERVICE CATEGORY DESCRIPTION SPECIFIC PRE-APPROVED SERVICE SUBCATEGORIES CATEGORY ---------------- -------------------------------- ------------------------------------------------- I. AUDIT Services that are directly o Accounting research assistance SERVICES related to performing the o SEC consultation, registration independent audit of the Funds statements, and reporting o Tax accrual related matters o Implementation of new accounting standards o Compliance letters (e.g. rating agency letters) o Regulatory reviews and assistance regarding financial matters o Semi-annual reviews (if requested) o Comfort letters for closed end offerings ---------------- -------------------------------- ------------------------------------------------- II. Services which are not o AICPA attest and agreed-upon procedures AUDIT-RELATED prohibited under Rule o Technology control assessments SERVICES 210.2-01(C)(4) (the "Rule") o Financial reporting control assessments and are related extensions of o Enterprise security architecture the audit services support the assessment audit, or use the knowledge/expertise gained from the audit procedures as a foundation to complete the project. In most cases, if the Audit-Related Services are not performed by the Audit firm, the scope of the Audit Services would likely increase. The Services are typically well-defined and governed by accounting professional standards (AICPA, SEC, etc.) ---------------- -------------------------------- ------------------------------------------------- ------------------------------------- ------------------------------------ AUDIT COMMITTEE APPROVAL POLICY AUDIT COMMITTEE REPORTING POLICY ------------------------------------- ------------------------------------ o "One-time" pre-approval o A summary of all such for the audit period for all services and related fees pre-approved specific service reported at each regularly subcategories. Approval of the scheduled Audit Committee independent auditors as meeting. auditors for a Fund shall constitute pre approval for these services. ------------------------------------- ------------------------------------ o "One-time" pre-approval o A summary of all such for the fund fiscal year within services and related fees a specified dollar limit (including comparison to for all pre-approved specified dollar limits) specific service subcategories reported quarterly. o Specific approval is needed to exceed the pre-approved dollar limit for these services (see general Audit Committee approval policy below for details on obtaining specific approvals) o Specific approval is needed to use the Fund's auditors for Audit-Related Services not denoted as "pre-approved", or to add a specific service subcategory as "pre-approved" ------------------------------------- ------------------------------------ SECTION III - POLICY DETAIL, CONTINUED ----------------------- --------------------------- ----------------------------------------------- SERVICE CATEGORY SERVICE CATEGORY SPECIFIC PRE-APPROVED SERVICE SUBCATEGORIES DESCRIPTION ----------------------- --------------------------- ----------------------------------------------- III. TAX SERVICES Services which are not o Tax planning and support prohibited by the Rule, o Tax controversy assistance if an officer of the Fund o Tax compliance, tax returns, excise determines that using the tax returns and support Fund's auditor to provide o Tax opinions these services creates significant synergy in the form of efficiency, minimized disruption, or the ability to maintain a desired level of confidentiality. ----------------------- --------------------------- ----------------------------------------------- ------------------------------------- ------------------------- AUDIT COMMITTEE APPROVAL POLICY AUDIT COMMITTEE REPORTING POLICY ------------------------------------- ------------------------- ------------------------------------- ------------------------- o "One-time" pre-approval o A summary of for the fund fiscal year all such services and within a specified dollar limit related fees 				 (including comparison 			 to specified dollar 			 limits) reported 			 quarterly. o Specific approval is needed to exceed the pre-approved dollar limits for these services (see general Audit Committee approval policy below for details on obtaining specific approvals) o Specific approval is needed to use the Fund's auditors for tax services not denoted as pre-approved, or to add a specific service subcategory as "pre-approved" ------------------------------------- ------------------------- SECTION III - POLICY DETAIL, CONTINUED ----------------------- --------------------------- ----------------------------------------------- SERVICE CATEGORY SERVICE CATEGORY SPECIFIC PRE-APPROVED SERVICE SUBCATEGORIES DESCRIPTION ----------------------- --------------------------- ----------------------------------------------- IV. OTHER SERVICES Services which are not o Business Risk Management support prohibited by the Rule, o Other control and regulatory A. SYNERGISTIC, if an officer of the Fund compliance projects UNIQUE QUALIFICATIONS determines that using the Fund's auditor to provide these services creates significant synergy in the form of efficiency, minimized disruption, the ability to maintain a desired level of confidentiality, or where the Fund's auditors posses unique or superior qualifications to provide these services, resulting in superior value and results for the Fund. ----------------------- --------------------------- ----------------------------------------------- --------------------------------------- ------------------------ AUDIT COMMITTEE APPROVAL POLICY AUDIT COMMITTEE REPORTING POLICY ------------------------------------- -------------------------- o "One-time" pre-approval o A summary of for the fund fiscal year within all such services and a specified dollar limit related fees 			 (including comparison 			 to specified dollar 				 limits) reported quarterly. o Specific approval is needed to exceed the pre-approved dollar limits for these services (see general Audit Committee approval policy below for details on obtaining specific approvals) o Specific approval is needed to use the Fund's auditors for "Synergistic" or "Unique Qualifications" Other Services not denoted as pre-approved to the left, or to add a specific service subcategory as "pre-approved" ------------------------------------- -------------------------- SECTION III - POLICY DETAIL, CONTINUED ----------------------- ------------------------- ----------------------------------------------- SERVICE CATEGORY SERVICE CATEGORY SPECIFIC PROHIBITED SERVICE SUBCATEGORIES DESCRIPTION ----------------------- ------------------------- ----------------------------------------------- PROHIBITED SERVICES Services which result 1. Bookkeeping or other services in the auditors losing related to the accounting records or independence status financial statements of the audit under the Rule. client* 2. Financial information systems design and implementation* 3. Appraisal or valuation services, fairness* opinions, or contribution-in-kind reports 4. Actuarial services (i.e., setting actuarial reserves versus actuarial audit work)* 5. Internal audit outsourcing services* 6. Management functions or human resources 7. Broker or dealer, investment advisor, or investment banking services 8. Legal services and expert services unrelated to the audit 9. Any other service that the Public Company Accounting Oversight Board determines, by regulation, is impermissible ----------------------- ------------------------- ----------------------------------------------- ------------------------------------------- ------------------------------ AUDIT COMMITTEE APPROVAL POLICY AUDIT COMMITTEE REPORTING POLICY ------------------------------------------- ------------------------------ o These services are not to be o A summary of all performed with the exception of the(*) services and related services that may be permitted fees reported at each if they would not be subject to audit regularly scheduled procedures at the audit client (as Audit Committee meeting defined in rule 2-01(f)(4)) level will serve as continual the firm providing the service. confirmation that has 				 not provided any restricted services. ------------------------------------------- ------------------------------ -------------------------------------------------------------------------------- GENERAL AUDIT COMMITTEE APPROVAL POLICY: o For all projects, the officers of the Funds and the Fund's auditors will each make an assessment to determine that any proposed projects will not impair independence. o Potential services will be classified into the four non-restricted service categories and the "Approval of Audit, Audit-Related, Tax and Other Services" Policy above will be applied. Any services outside the specific pre-approved service subcategories set forth above must be specifically approved by the Audit Committee. o At least quarterly, the Audit Committee shall review a report summarizing the services by service category, including fees, provided by the Audit firm as set forth in the above policy. -------------------------------------------------------------------------------- (2) Disclose the percentage of services described in each of paragraphs (b) through (d) of this Item that were approved by the audit committee pursuant to paragraph (c)(7)(i)(C) of Rule 2-01 of Regulation S-X. N/A (f) If greater than 50 percent, disclose the percentage of hours expended on the principal accountant's engagement to audit the registrant's financial statements for the most recent fiscal year that were attributed to work performed by persons other than the principal accountant's full-time, permanent employees. N/A (g) Disclose the aggregate non-audit fees billed by the registrant's accountant for services rendered to the registrant, and rendered to the registrant's investment adviser (not including any sub-adviser whose role is primarily portfolio management and is subcontracted with or overseen by another investment adviser), and any entity controlling, controlled by, or under common control with the adviser that provides ongoing services to the registrant for each of the last two fiscal years of the registrant. N/A (h) Disclose whether the registrant's audit committee of the board of trustees has considered whether the provision of non-audit services that were rendered to the registrant's investment adviser (not including any subadviser whose role is primarily portfolio management and is subcontracted with or overseen by another investment adviser), and any entity controlling, controlled by, or under common control with the investment adviser that provides ongoing services to the registrant that were not pre-approved pursuant to paragraph (c)(7)(ii) of Rule 2-01 of Regulation S-X is compatible with maintaining the principal accountant's independence. The Fund's audit committee of the Board of Trustees has considered whether the provision of non-audit services that were rendered to the Affiliates (as defined) that were not pre- approved pursuant to paragraph (c)(7)(ii) of Rule 2-01 of Regulation S-X is compatible with maintaining the principal accountant's independence. Item 5. Audit Committee of Listed Registrants (a) If the registrant is a listed issuer as defined in Rule 10A-3 under the Exchange Act (17 CFR 240.10A-3), state whether or not the registrant has a separately-designated standing audit committee established in accordance with Section 3(a)(58)(A) of the Exchange Act (15 U.S.C. 78c(a)(58)(A)). If the registrant has such a committee, however designated, identify each committee member. If the entire board of directors is acting as the registrants audit committee as specified in Section 3(a)(58)(B) of the Exchange Act (15 U.S.C. 78c(a)(58)(B)), so state. N/A (b) If applicable, provide the disclosure required by Rule 10A-3(d) under the Exchange Act (17 CFR 240.10A-3(d)) regarding an exemption from the listing standards for audit committees. N/A Item 6. Schedule of Investments. File Schedule I Investments in securities of unaffiliated issuers as of the close of the reporting period as set forth in 210.12- 12 of Regulation S-X [17 CFR 210.12-12], unless the schedule is included as part of the report to shareholders filed under Item 1 of this Form. Included in Item 1 ITEM 7. DISCLOSURE OF PROXY VOTING POLICIES AND PROCEDURES FOR CLOSED-END MANAGEMENT INVESTMENT COMPANIES. A closed-end management investment company that is filing an annual report on this Form N-CSR must, unless it invests exclusively in non-voting securities, describe the policies and procedures that it uses to determine how to vote proxies relating to portfolio securities, including the procedures that the company uses when a vote presents a conflict between the interests of its shareholders, on the one hand, and those of the company's investment adviser; principal underwriter; or any affiliated person (as defined in Section 2(a)(3) of the Investment Company Act of 1940 (15 U.S.C. 80a-2(a)(3)) and the rules thereunder) of the company, its investment adviser, or its principal underwriter, on the other. Include any policies and procedures of the company's investment adviser, or any other third party, that the company uses, or that are used on the company's behalf, to determine how to vote proxies relating to portfolio securities. Not applicable to open-end management investment companies. Item 8. Portfolio Managers of Closed-End Management Investment Companies. (a) If the registrant is a closed-end management investment company that is filing an annual report on this Form N-CSR,provide the following information: (1) State the name, title, and length of service of the person or persons employed by or associated with the registrant or an investment adviser of the registrant who are primarily responsible for the day-to-day management of the registrants portfolio (Portfolio Manager). Also state each Portfolio Managers business experience during the past 5 years. Not applicable to open-end management investment companies. Item 9. Purchases of Equity Securities by Closed-End Management Investment Company and Affiliated Purchasers. (a) If the registrant is a closed-end management investment company, in the following tabular format, provide the information specified in paragraph (b) of this Item with respect to any purchase made by or on behalf of the registrant or any affiliated purchaser, as defined in Rule 10b-18(a)(3) under the Exchange Act (17 CFR 240.10b-18(a)(3)), of shares or other units of any class of the registrants equity securities that is registered by the registrant pursuant to Section 12 of the Exchange Act (15 U.S.C. 781). Instruction to paragraph (a). Disclose all purchases covered by this Item, including purchases that do not satisfy the conditions of the safe harbor of Rule 10b-18 under the Exchange Act (17 CFR 240.10b-18), made in the period covered by the report. Provide disclosures covering repurchases made on a monthly basis. For example, if the reporting period began on January 16 and ended on July 15, the chart would show repurchases for the months from January 16 through February 15, February 16 through March 15, March 16 through April 15, April 16 through May 15, May 16 through June 15, and June 16 through July 15. Not applicable to open-end management investment companies. Item 10. Submission of Matters to a Vote of Security Holders. Describe any material changes to the procedures by which shareholders may recommend nominees to the registrants board of directors, where those changes were implemented after the registrant last provided disclosure in response to the requirements of Item 7(d)(2)(ii)(G) of Schedule 14A (17 CFR 240.14a-101), or this Item. There have been no material changes to the procedures by which the shareholders may recommend nominees to the registrants board of directors since the registrant last provided disclosure in response to the requirements of Item 7(d)(2)(ii)(G) of Schedule 14(A) in its definitive proxy statement, or this Item. ITEM 11. CONTROLS AND PROCEDURES. (a) Disclose the conclusions of the registrant's principal executive officer or officers and principal financial officer or officers, or persons performing similar functions, about the effectiveness of the registrant's disclosure controls and procedures (as defined in Rule 30a-2(c) under the Act (17 CFR 270.30a-2(c))) based on their evaluation of these controls and procedures as of a date within 90 days of the filing date of the report that includes the disclosure required by this paragraph. The registrant's principal executive officer and principal financial officer have concluded that the registrant's disclosure controls and procedures are effective based on their evaluation of these controls and procedures as of a date within 90 days of the filing date of this report. (b) Disclose whether or not there were significant changes in the registrant's internal controls or in other factors that could significantly affect these controls subsequent to the date of their evaluation, including any corrective actions with regard to significant deficiencies and material weaknesses. There were no significant changes in the registrant's internal control over financial reporting that occurred during the second fiscal quarter of the period covered by this report that have materially affected, or are reasonably likely to materially affect, the registrant's internal control over financial reporting. The registrant's principal executive officer and principal financial officer, however, voluntarily are reporting the following information: In August of 2006 the registrant's investment adviser enhanced its internal procedures for reporting performance information required to be included in prospectuses. Those enhancements involved additional internal controls over the appropriateness of performance data generated for this purpose. Such enhancements were made following an internal review which identified prospectuses relating to certain classes of shares of a limited number of registrants where, inadvertently, performance information not reflecting the deduction of applicable sales charges was included. Those prospectuses were revised, and the revised prospectuses were distributed to shareholders. ITEM 12. EXHIBITS. File the exhibits listed below as part of this Form. Letter or number the exhibits in the sequence indicated. (a) Any code of ethics, or amendment thereto, that is the subject of the disclosure required by Item 2, to the extent that the registrant intends to satisfy the Item 2 requirements through filing of an exhibit. (b) A separate certification for each principal executive officer and principal financial officer of the registrant as required by Rule 30a-2 under the Act (17 CFR 270.30a-2). Filed herewith. SIGNATURES [See General Instruction F] Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. (Registrant) Pioneer Series Trust II By (Signature and Title)* /s/ John F. Cogan, Jr. John F. Cogan, Jr, President Date August 29, 2013 Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated. By (Signature and Title)* /s/ John F. Cogan, Jr. John F. Cogan, Jr., President Date August 29, 2013 By (Signature and Title)* /s/ Mark Bradley Mark Bradley, Treasurer & Chief Accounting & Financial Officer Date August 29, 2013 * Print the name and title of each signing officer under his or her signature.