OMB APPROVAL OMB Number: 3235-0570 Expires: January 31, 2017 Estimated average burden hours per response.....20.6 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM N-CSR CERTIFIED SHAREHOLDER REPORT OF REGISTERED MANAGEMENT INVESTMENT COMPANIES 		Investment Company Act file number 811-07318 Pioneer Series Trust VIII (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: November 30 Date of reporting period: December 1, 2014 through May 31, 2015 Form N-CSR is to be used by management investment companies to file reports with the Commission not later than 10 days after the transmission to stockholders of any report that is required to be transmitted to stockholders under Rule 30e-1 under the Investment Company Act of 1940 (17 CFR 270.30e-1). The Commission may use the information provided on Form N-CSR in its regulatory, disclosure review, inspection, and policymaking roles. A registrant is required to disclose the information specified by Form N-CSR, and the Commission will make this information public. A registrant is not required to respond to the collection of information contained in Form N-CSR unless the Form displays a currently valid Office of Management and Budget ("OMB") control number. Please direct comments concerning the accuracy of the information collection burden estimate and any suggestions for reducing the burden to Secretary, Securities and Exchange Commission, 450 Fifth Street, NW, Washington, DC 20549-0609. The OMB has reviewed this collection of information under the clearance requirements of 44 U.S.C. ss. 3507. ITEM 1. REPORTS TO STOCKHOLDERS. Pioneer International Value Fund -------------------------------------------------------------------------------- Semiannual Report | May 31, 2015 -------------------------------------------------------------------------------- Ticker Symbols: Class A PIIFX Class C PCITX Class Y INVYX [LOGO] PIONEER Investments(R) visit us: us.pioneerinvestments.com Table of Contents President's Letter 2 Portfolio Management Discussion 4 Portfolio Summary 10 Prices and Distributions 11 Performance Update 12 Comparing Ongoing Fund Expenses 15 Schedule of Investments 17 Financial Statements 25 Notes to Financial Statements 32 Trustees, Officers and Service Providers 44 Pioneer International Value Fund | Semiannual Report | 5/31/15 1 President's Letter Dear Shareowner, At mid-year, economic conditions and government policies around the world are far from homogeneous, and we expect them to continue to diverge. In the United States, an ongoing economic expansion has brought the unemployment rate down to levels where wage growth is likely to accelerate. Economic growth and fiscal austerity have dramatically reduced the Federal budget deficit, while very accommodative Federal Reserve System policies have kept interest rates exceptionally low. In Europe and Japan, cyclical economic recoveries/ expansions appear to be gaining traction, buttressed by aggressive quantitative easing policies of central banks as well as cheaper currencies. China's ongoing transition from an infrastructure investment-driven to a consumer-driven economy and the dramatic decline in the price of oil -- largely a result of U.S. "fracking" -- have benefited some countries while burdening others. On balance, though, the global economic outlook has continued to improve, although economic and geopolitical "storm clouds" remain. Today's market environment presents numerous opportunities as well as challenges for investors. While we believe that the capital markets may already have priced in some recent trends, such as the U.S. dollar's appreciation against a basket of global currencies, it is worth noting that investment risks and opportunities are not always aligned with the economic outlook. Since 1928, Pioneer's investment professionals have focused on identifying and capitalizing on the investment opportunities that present themselves in a variety of ever-changing economic and market conditions, including those we face today, while seeking to limit the risk of the permanent impairment of our clients' capital. Our ongoing goal is to deliver competitive returns consistent with our strategies' stated style and objectives and consistent with our shareholders' expectations over a range of market conditions. We believe our shareowners benefit from the experience and tenure of our investment teams, the insights generated from extensive research resources, and our commitment to prudent risk management. 2 Pioneer International Value Fund | Semiannual Report | 5/31/15 We encourage you to work with your financial advisor to develop an overall investment plan that addresses both your short- and long-term goals, and to implement such a plan in a disciplined manner, as we do when managing the assets our clients have entrusted to us. We greatly appreciate your trust in us in the past and look forward to continuing to serve you in the future. Sincerely, /s/ Lisa M. Jones 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. Past performance is no guarantee of future results. Pioneer International Value Fund | Semiannual Report | 5/31/15 3 Portfolio Management Discussion | 5/31/15 In the follow interview, Madelynn Matlock discusses the market environment for international equities and the factors that influenced the performance of Pioneer International Value Fund during the six-month period ended May 31, 2015. Ms. Matlock, a senior vice president and a portfolio manager at Pioneer, Marco Pirondini, Head of Equities, U.S., and a portfolio manager at Pioneer, and Andrea Salvatori, Head of Global Emerging Markets & Latin American Equities, Head of Emerging Market Equity Research, and a senior portfolio manager at Pioneer based in Pioneer's London office, are responsible for the day-to-day management of the Fund. Q How did the Fund perform during the six-month period ended May 31, 2015? A Pioneer International Value Fund's Class A shares returned 6.09% at net asset value during the six-month period ended May 31, 2015, while the Fund's benchmark, the Morgan Stanley Capital International (MSCI) Europe, Australasia, Far East (EAFE) ND Index1, returned 4.84%. During the same period, the average return of the 394 mutual funds in Lipper's International Multi-Cap Core Funds category was 4.98%, and the average return of the 798 mutual funds in Morningstar's Foreign Large Blend Funds category was 5.12%. Q How would you characterize the investment environment for international equities during the six-month period ended May 31, 2015? A International equity markets experienced considerable volatility, but still gained ground during the six-month period. With global economies growing at different rates, monetary policies of central banks showed signs of diverging. The U.S. economy, despite a winter weather-related setback in the first quarter of 2015, has been strengthening for the most part, moving the Federal Reserve System (the Fed) toward a tightening posture as it (1) The MSCI information may only be used for your internal use, may not be reproduced or redisseminated in any form and may not be used as a basis for or a component of any financial instruments or products or indices. None of the MSCI information is intended to constitute investment advice or a recommendation to make (or refrain from making) any kind of investment decision and may not be relied on as such. Historical data and analysis should not be taken as an indication or guarantee of any future performance analysis, forecast or prediction. The MSCI information is provided on an "as is" basis and the user of this information assumes the entire risk of any use made of this information. MSCI, each of its affiliates and each other person involved in or related to compiling, computing or creating any MSCI information (collectively, the "MSCI Parties") expressly disclaims all warranties (including, without limitation, any warranties of originality, accuracy, completeness, timeliness, non-infringement, merchantability and fitness for a particular purpose) with respect to this information. Without limiting any of the foregoing, in no event shall any MSCI Party have any liability for any direct, indirect, special, incidental, punitive, consequential (including, without limitation, lost profits) or any other damages. 4 Pioneer International Value Fund | Semiannual Report | 5/31/15 contemplates the timing of its first interest-rate increase since 2006. Meanwhile, central banks in other countries and regions implemented monetary easing policies, as the rest of the world's economies were generally in a low-growth or decelerating mode. With bouts of geopolitical tensions in the Middle East, Greece's standoff with its creditors, and growing risk of a stock market bubble in China adding further uncertainty, foreign currency markets were volatile during the period, and the U.S. dollar rose sharply. Despite stagnating global growth and falling demand for oil, particularly in Europe, the OPEC (Organization of the Petroleum Exporting Countries) cartel maintained its crude oil production levels, contributing to a glaring supply/demand imbalance. The ensuing decline in crude oil prices was swift and dramatic, highlighted by crude oil's falling to as low as $46 a barrel this past April. While the negative fallout was most severe for emerging markets countries dependent on oil revenue, consumers benefited from lower oil prices, as did oil-dependent industries such as transportation. Against that backdrop, developed-market international stocks slightly outperformed U.S. stocks during the six-month period (the Standard & Poor's 500 Index returned 2.97%, while the MSCI World ND Index returned 3.38%). Within international equity markets, the Pacific Rim, with relatively strong performance from Japan, led the way, followed by Europe. Developed markets significantly outpaced emerging markets for the period, as the MSCI Emerging Markets ND Index returned just 0.82%. From a sector perspective, health care and information technology were the best performers during the six-month period, while utilities and energy - reflecting the sharp decline in oil prices and slowing consumer demand - turned in negative performance. Q What was the main reason behind the Fund's outperformance relative to its benchmark, the MSCI EAFE Index, during the six-month period ended May 31, 2015? A Positive stock selection results made the biggest contribution to the Fund's outperformance of the MSCI EAFE Index during the period. Sector weights and regional allocations also added some incremental returns to relative performance. Our research-driven investment approach is rooted in evaluating and choosing stocks that we believe have good return potential, with the goal of not overpaying for that potential. We evaluate every company's return on Pioneer International Value Fund | Semiannual Report | 5/31/15 5 invested capital versus what the company must pay for that capital, and we favor companies that are either adding value on a consistent basis or that have the potential to improve their returns over time. We also try to take advantage of long-running secular trends that may lead to higher returns in the future, and we avoid what we consider negative trends that might drag on companies' performance, even if they are well managed. With regard to individual stocks, positive benchmark-relative returns for the six-month period derived largely from the Fund's positions in less well-known, more mid-sized companies. Examples of portfolio holdings in mid-sized companies that contributed to the Fund's relative performance include Murata, Persimmon, Pax Global, and Sundrug. Q What other investment strategies contributed to the Fund's positive results during the six-month period ended May 31, 2015? A The Fund benefitted from a greater-than-benchmark weighting in Japan, as that country's market turned in strong performance during the period. We have been encouraged by Japan's aggressive monetary policies and shareholder-friendly market reforms, which are helping to support equity prices there. In fact, two of the Fund's best-performing stocks during the period were domiciled in Japan, the aforementioned Murata and Sundrug. Murata, a manufacturer of electronics used to enable wireless communications for Smartphones and other products, was a beneficiary of the growth in global Smartphone usage. Murata's stock price also rose on news of the company's decision to expand its reach into the so-called "Internet of Things" -- connecting thermostats, appliances, etc., to computers and Smartphones. The Fund's shares of Sundrug, a drug store chain, also performed well during the period. With the regulatory environment for dispensing drugs beginning to ease in Japan and the one-time shock of the increase in the country's value-added tax waning, the company's stock rallied. As regulations gradually ease, we believe Sundrug is in a good position to benefit from its retail network capabilities. With regard to sector weights, our decision to overweight the portfolio in technology and to underweight energy and materials aided benchmark- relative returns. Within materials, however, we focused on stocks of companies that we thought would perform well in an environment of weak commodity prices. Shares of Incitec Pivot, the Australian distributor of fertilizers, and Syngenta, the Swiss agricultural company, exemplified our strategy as both turned in solid performance. Syngenta's stock also rallied on the announcement of an offer by Monsanto to purchase the company. 6 Pioneer International Value Fund | Semiannual Report | 5/31/15 Q Which of your investment strategies detracted the most from the Fund's performance during the six-month period ended May 31, 2015? A Energy stocks were among the worst performers, overall, during the six-month period. The unexpectedly sharp decline in oil prices and OPEC's decision not to lend support to prices by cutting production created a ripple effect throughout the global economy. The impact has been felt most profoundly among oil-exploration and oil-production companies, which have reduced capital spending in the wake of the supply/demand imbalance. While we maintained the portfolio's lower-than-benchmark weighting in energy during the period, the steep decline in the value of most energy stocks weighed on the Fund's performance. In addition to the effects of falling oil revenues, the Fund's position in Encana, the Canadian energy giant, also suffered as a result of management's ill-timed offer to buy an oil producer in the Texas shale area. Two other Fund holdings tied to the commodity market detracted from performance during the six-month period: Komatsu and GDF Suez. Komatsu, a Japanese manufacturer of construction machinery and vehicles, struggled in response to a deteriorating outlook for the construction and mining industries. France's largest utility, GDF Suez, fell prey to falling oil and gas prices. Even with the company's increasing focus on renewable energies and efficiency services which rely on digital technologies, GDF's fundamental outlook appears challenged, in our estimation. Both Komatsu and GDF were sold from the portfolio before the end of the period. Finally, although the weaker euro and yen relative to the U.S. dollar provided tailwinds for companies in the Fund's portfolio that export to, or have operations in, the United States, the decline in value of those companies' home currencies weighed on their stock prices when the currencies were translated back to U.S. dollars. Currency volatility was pronounced during the six-month period, making earnings and profits harder to forecast for multinational companies such as Danone in France, and Yaskawa in Japan, two portfolio holdings which detracted from the Fund's performance. Pioneer International Value Fund | Semiannual Report | 5/31/15 7 Q Did the Fund have any derivative exposure during the six-month period ended May 31, 2015, and did the exposure have an effect on performance? A Yes. We used derivatives in the portfolio, including futures, forward foreign currency contracts and total return swaps, the latter of which we employed in an attempt to hedge the difference in the performance of Japan's Nikkei 400 Index, which was introduced in 2014, and the TOPIX (Tokyo Stock Price Index) Index. The hedge, which favored the relative outperformance of the Nikkei 400, was slightly accretive for the Fund's performance during the period. Q What is your outlook for international stocks for the remainder of 2015? A While we are optimistic about the investment environment for international equities in the intermediate and longer terms, we believe growth in the developed markets is likely to be uneven. Our near-term outlook is guarded, as global growth concerns combined with a stronger U.S. dollar are having an effect on corporate fundamentals, and the international equity markets in general. We are encouraged by the pro-growth policies emanating from the European Central Bank and the Bank of Japan, which are designed to help stimulate the respective economies of the euro zone and Japan. But the difficult, long-term reforms that are needed for many markets in Europe and Japan to become more competitive are only in their infancy. Thus, while we are confident that Europe offers long-term growth potential, our near-term outlook for the region is more guarded in light of a challenging corporate earnings picture. Even so, while the outcome of the Greek debt crisis was still in question at the end of the reporting period, the risk of the European Union's breaking up has, in our view, diminished greatly over the past several years. In Japan, we remain encouraged by improvements in corporate governance and efforts directed at improving returns for shareholders. In the emerging markets, we continue to see weakness in Latin America, offset by pockets of strength in Asia. With such a complex backdrop, we will continue to rely on our research- driven investment process when choosing investments for the Fund, focusing on companies with reasonable stock valuations, solid growth, profitability, and a presence in markets where we see secular growth potential. 8 Pioneer International Value Fund | Semiannual Report | 5/31/15 Please refer to the Schedule of Investments on pages 17-24 for a full listing of Fund securities. Investing in foreign and/or emerging markets securities involves risks relating to interest rates, currency exchange rates, economic, and political conditions. The Fund may invest a substantial amount of its assets in issuers located within a specific region, and is, therefore, more susceptible to adverse developments affecting those regions. 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. At times, the Fund's investments may represent industries or industry sectors that are interrelated or have common risks, making it more susceptible to any economic, political, or regulatory developments or other risks affecting those industries or sectors. These risks may increase share price volatility. Before investing, consider the product's investment objectives, risks, charges and expenses. Contact your advisor or Pioneer Investments for a prospectus or summary prospectus containing this information. Read it carefully. Any information in this shareholder report regarding market or economic trends or the factors influencing the Fund's historical or future performance are statements of opinion as of the date of this report. Past performance is no guarantee of future results. Pioneer International Value Fund | Semiannual Report | 5/31/15 9 Portfolio Summary | 5/31/15 Sector Distribution -------------------------------------------------------------------------------- (As a percentage of total long-term holdings) [THE FOLLOWING DATA WAS REPRESENTED AS A PIE CHART IN THE PRINTED MATERIAL] Financials 24.0% Industrials 13.1% Health Care 13.0% Consumer Staples 10.9% Consumer Discretionary 10.4% Materials 9.0% Information Technology 7.7% Telecommunication Services 4.9% Energy 3.8% Utilities 3.2% Geographical Distribution -------------------------------------------------------------------------------- (As a percentage of total long-term holdings) Japan 30.6% United Kingdom 11.1% Switzerland 11.0% Germany 10.6% France 7.4% Australia 5.6% Spain 4.7% Netherlands 4.1% Ireland 3.3% Sweden 2.8% Jersey Channel Islands 2.6% Canada 2.3% Curacao 1.2% Bermuda 1.0% Other (individually less than 1%) 1.7% 10 Largest Holdings -------------------------------------------------------------------------------- (As a percentage of total long-term holdings)* 1. Shire Plc 2.57% -------------------------------------------------------------------------------- 2. Novartis AG 2.36 -------------------------------------------------------------------------------- 3. Syngenta AG 2.21 -------------------------------------------------------------------------------- 4. Fresenius SE & Co. KGaA 1.99 -------------------------------------------------------------------------------- 5. Zurich Insurance Group AG 1.93 -------------------------------------------------------------------------------- 6. Roche Holding AG 1.76 -------------------------------------------------------------------------------- 7. Gerresheimer AG 1.76 -------------------------------------------------------------------------------- 8. Vodafone Group Plc 1.74 -------------------------------------------------------------------------------- 9. Sundrug Co., Ltd. 1.74 -------------------------------------------------------------------------------- 10. UBS Group AG 1.71 -------------------------------------------------------------------------------- * 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. 10 Pioneer International Value Fund | Semiannual Report | 5/31/15 Prices and Distributions | 5/31/15 Net Asset Value per Share -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- Class 5/31/15 11/30/14 -------------------------------------------------------------------------------- A $22.38 $22.34 -------------------------------------------------------------------------------- C $19.65 $19.69 -------------------------------------------------------------------------------- Y $22.41 $22.41 -------------------------------------------------------------------------------- Distributions per Share: 12/1/14-5/31/15 -------------------------------------------------------------------------------- Short-Term Long-Term Class Dividends Capital Gains Capital Gains A $1.2250 $ -- $ -- -------------------------------------------------------------------------------- C $1.0635 $ -- $ -- -------------------------------------------------------------------------------- Y $1.3086 $ -- $ -- -------------------------------------------------------------------------------- Index Definition -------------------------------------------------------------------------------- The MSCI EAFE ND Index is an unmanaged, commonly used measure of international stocks. Index returns are calculated monthly, assume reinvestment of dividends and, unlike Fund returns, do not reflect any fees, expenses or sales charges. It is not possible to invest directly in an index. The index defined here pertains to the "Value of $10,000 Investment" and "Value of $5 Million Investment" charts on pages 12-14. Pioneer International Value Fund | Semiannual Report | 5/31/15 11 Performance Update | 5/31/15 Class A Shares Investment Returns -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $10,000 investment made in Class A shares of Pioneer International Value Fund at public offering price during the periods shown, compared to that of the Morgan Stanley Capital International (MSCI) Europe, Australasia and Far East (EAFE) ND Index. Average Annual Total Returns (As of May 31, 2015) -------------------------------------------------------------------------------- Net Public MSCI Asset Offering EAFE Value Price ND Period (NAV) (POP) Index -------------------------------------------------------------------------------- 10 Years 4.55% 3.93% 5.56% -------------------------------------------------------------------------------- 5 Years 8.64 7.36 9.90 -------------------------------------------------------------------------------- 1 Year 3.04 -2.87 -0.48 -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated April 1, 2015) -------------------------------------------------------------------------------- Gross Net -------------------------------------------------------------------------------- 1.70% 1.45% -------------------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $10,000 Investment Pioneer International Value Fund MSCI EAFE ND Index 5/31/2005 $ 9,425 $10,000 5/31/2006 $12,336 $12,824 5/31/2007 $15,480 $16,266 5/31/2008 $14,985 $15,855 5/31/2009 $ 9,590 $10,051 5/31/2010 $ 9,718 $10,715 5/31/2011 $12,388 $13,973 5/31/2012 $ 9,779 $11,111 5/31/2013 $12,525 $14,624 5/31/2014 $14,275 $17,263 5/31/2015 $14,710 $17,180 Call 1-800-225-6292 or visit us.pioneerinvestments.com for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. NAV results represent the percent change in net asset value per share. Returns would have been lower had sales charges been reflected. POP returns reflect deduction of maximum 5.75% sales charge. All results are historical and assume the reinvestment of dividends and capital gains. Other share classes are available for which performance and expenses will differ. Performance results reflect any applicable expense waivers in effect during the periods shown. Without such waivers Fund performance would be lower. Waivers may not be in effect for all funds. Certain fee waivers are contractual through a specified period. Otherwise, fee waivers can be rescinded at any time. See the prospectus and financial statements for more information. The net expense ratio reflects the contractual expense limitation currently in effect through April 1, 2016, 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. 12 Pioneer International Value Fund | Semiannual Report | 5/31/15 Performance Update | 5/31/15 Class C Shares Investment Returns -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $10,000 investment made in Class C shares of Pioneer International Value Fund during the periods shown, compared to that of the Morgan Stanley Capital International (MSCI) Europe, Australasia and Far East (EAFE) ND Index. Average Annual Total Returns (As of May 31, 2015) -------------------------------------------------------------------------------- MSCI EAFE If If ND Period Held Redeemed Index -------------------------------------------------------------------------------- 10 Years 3.65% 3.65% 5.56% -------------------------------------------------------------------------------- 5 Years 7.67 7.67 9.90 -------------------------------------------------------------------------------- 1 Year 2.12 2.12 -0.48 -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated April 1, 2015) -------------------------------------------------------------------------------- Gross Net -------------------------------------------------------------------------------- 2.44% 2.35% -------------------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $10,000 Investment Pioneer International Value Fund MSCI EAFE ND Index 5/31/2005 $10,000 $10,000 5/31/2006 $12,983 $12,824 5/31/2007 $16,185 $16,266 5/31/2008 $15,542 $15,855 5/31/2009 $9,849 $10,051 5/31/2010 $9,889 $10,715 5/31/2011 $12,495 $13,973 5/31/2012 $9,777 $11,111 5/31/2013 $12,411 $14,624 5/31/2014 $14,015 $17,263 5/31/2015 $14,312 $17,180 Call 1-800-225-6292 or visit us.pioneerinvestments.com for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. Class C shares held for less than one year are also subject to a 1% contingent deferred sales charge (CDSC). "If Held" results represent the percent change in net asset value per share. Returns would have been lower had sales charges been reflected. All results are historical and assume the reinvestment of dividends and capital gains. Other share classes are available for which performance and expenses will differ. Performance results reflect any applicable expense waivers in effect during the periods shown. Without such waivers Fund performance would be lower. Waivers may not be in effect for all funds. Certain fee waivers are contractual through a specified period. Otherwise, fee waivers can be rescinded at any time. See the prospectus and financial statements for more information. The net expense ratio reflects the contractual expense limitation currently in effect through April 1, 2016, for Class C 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 International Value Fund | Semiannual Report | 5/31/15 13 Performance Update | 5/31/15 Class Y Shares Investment Returns -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $5 million investment made in Class Y shares of Pioneer International Value Fund during the periods shown, compared to that of the Morgan Stanley Capital International (MSCI) Europe, Australasia and Far East (EAFE) ND Index. Average Annual Total Returns (As of May 31, 2015) -------------------------------------------------------------------------------- Net MSCI Asset EAFE Value ND Period (NAV) Index -------------------------------------------------------------------------------- 10 Years 4.83% 5.56% -------------------------------------------------------------------------------- 5 Years 9.10 9.90 -------------------------------------------------------------------------------- 1 Year 3.44 -0.48 -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated April 1, 2015) -------------------------------------------------------------------------------- Gross -------------------------------------------------------------------------------- 1.06% -------------------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $5 Million Investment Pioneer International Value Fund MSCI EAFE ND Index 5/31/2005 $5,000,000 $5,000,000 5/31/2006 $6,545,902 $6,412,160 5/31/2007 $8,214,117 $8,133,246 5/31/2008 $7,951,309 $7,927,325 5/31/2009 $5,095,104 $5,025,274 5/31/2010 $5,182,762 $5,357,605 5/31/2011 $6,640,097 $6,986,695 5/31/2012 $5,262,478 $5,555,503 5/31/2013 $6,767,709 $7,312,001 5/31/2014 $7,745,502 $8,631,309 5/31/2015 $8,011,617 $8,589,856 Call 1-800-225-6292 or visit us.pioneerinvestments.com for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. Class Y shares were first publicly offered on April 16, 2009. Performance shown for periods prior to the inception of Class Y shares on April 16, 2009, reflects the NAV performance of the Fund's Class A shares. The performance does not reflect differences in expenses, including the Rule 12b-1 fees applicable to Class A shares. Since fees for Class A shares are generally higher than those of Class Y shares, the performance for Class Y shares prior to their inception would have been higher than the performance shown. For the period beginning April 16, 2009, the actual performance of Class Y shares is reflected. Class Y shares are not subject to sales charges and are available for limited groups of eligible investors, including institutional investors. All results are historical and assume the reinvestment of dividends and capital gains. Other share classes are available for which performance and expenses will differ. Performance results reflect any applicable expense waivers in effect during the periods shown. Without such waivers Fund performance would be lower. Waivers may not be in effect for all funds. Certain fee waivers are contractual through a specified period. Otherwise, fee waivers can be rescinded at any time. See the prospectus and financial statements for more information. The performance table and graph do not reflect the deduction of fees and taxes that a shareowner would pay on Fund distributions or the redemption of Fund shares. 14 Pioneer International Value Fund | Semiannual Report | 5/31/15 Comparing Ongoing Fund Expenses As a shareowner in the Fund, you incur two types of costs: (1) ongoing costs, including management fees, distribution and/or service (12b-1) fees, and other Fund expenses; and (2) transaction costs, including sales charges (loads) on purchase payments. This example is intended to help you understand your ongoing expenses (in dollars) of investing in the Fund and to compare these costs with the ongoing costs of investing in other mutual funds. The example is based on an investment of $1,000 at the beginning of the Fund's latest six-month period and held throughout the six months. Using the Tables -------------------------------------------------------------------------------- Actual Expenses The first table below provides information about actual account values and actual expenses. You may use the information in this table, together with the amount you invested, to estimate the expenses that you paid over the period as follows: (1) Divide your account value by $1,000 Example: an $8,600 account value (divided by) $1,000 = 8.6 (2) Multiply the result in (1) above by the corresponding share class's number in the third row under the heading entitled "Expenses Paid During Period" to estimate the expenses you paid on your account during this period. Expenses Paid on a $1,000 Investment in Pioneer International Value Fund Based on actual returns from December 1, 2014 through May 31, 2015. -------------------------------------------------------------------------------- Share Class A C Y -------------------------------------------------------------------------------- Beginning Account $1,000.00 $1,000.00 $1,000.00 Value on 12/1/14 -------------------------------------------------------------------------------- Ending Account $1,060.90 $1,055.90 $1,063.00 Value (after expenses) on 5/31/15 -------------------------------------------------------------------------------- Expenses Paid $ 7.45 $ 12.05 $ 5.14 During Period* -------------------------------------------------------------------------------- * Expenses are equal to the Fund's annualized expense ratio of 1.45%, 2.35%, and 1.00%, multiplied by the average account value over the period, multiplied by 182/365 (to reflect the one-half year period). Pioneer International Value Fund | Semiannual Report | 5/31/15 15 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), or redemption fees 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 International Value Fund Based on a hypothetical 5% return per year before expenses, reflecting the period from December 1, 2014 through May 31, 2015. -------------------------------------------------------------------------------- Share Class A C Y -------------------------------------------------------------------------------- Beginning Account $1,000.00 $1,000.00 $1,000.00 Value on 12/1/14 -------------------------------------------------------------------------------- Ending Account $1,017.70 $1,013.21 $1,019.95 Value (after expenses) on 5/31/15 -------------------------------------------------------------------------------- Expenses Paid $ 7.29 $ 11.80 $ 5.04 During Period* -------------------------------------------------------------------------------- * Expenses are equal to the Fund's annualized expense ratio of 1.45%, 2.35%, and 1.00%, multiplied by the average account value over the period, multiplied by 182/365 (to reflect the one-half year period). 16 Pioneer International Value Fund | Semiannual Report | 5/31/15 Schedule of Investments | 5/31/15 (unaudited) ---------------------------------------------------------------------------------------------- Shares Value ---------------------------------------------------------------------------------------------- COMMON STOCKS -- 96.4% ENERGY -- 3.7% Oil & Gas Equipment & Services -- 1.2% 26,200 Schlumberger, Ltd. $ 2,378,174 ---------------------------------------------------------------------------------------------- Integrated Oil & Gas -- 1.0% 113,000 BG Group Plc $ 1,965,349 ---------------------------------------------------------------------------------------------- Oil & Gas Exploration & Production -- 1.5% 230,000 Encana Corp. $ 2,913,826 -------------- Total Energy $ 7,257,349 ---------------------------------------------------------------------------------------------- MATERIALS -- 8.7% Commodity Chemicals -- 2.3% 232,400 Kuraray Co., Ltd. $ 3,044,695 27,100 Methanex Corp. 1,503,571 -------------- $ 4,548,266 ---------------------------------------------------------------------------------------------- Diversified Chemicals -- 1.4% 928,800 Incitec Pivot, Ltd. $ 2,821,101 ---------------------------------------------------------------------------------------------- Fertilizers & Agricultural Chemicals -- 2.1% 9,200 Syngenta AG $ 4,214,142 ---------------------------------------------------------------------------------------------- Specialty Chemicals -- 1.6% 69,200 Croda International Plc $ 3,096,824 ---------------------------------------------------------------------------------------------- Paper Packaging -- 1.3% 223,600 Amcor, Ltd. $ 2,470,326 -------------- Total Materials $ 17,150,659 ---------------------------------------------------------------------------------------------- CAPITAL GOODS -- 12.7% Agricultural & Farm Machinery -- 1.0% 121,000 Kubota Corp. $ 2,009,079 ---------------------------------------------------------------------------------------------- Building Products -- 2.8% 35,400 Daikin Industries, Ltd. $ 2,705,208 165,000 TOTO, Ltd. 2,721,438 -------------- $ 5,426,646 ---------------------------------------------------------------------------------------------- Electrical Components & Equipment -- 1.6% 41,200 Schneider Electric SE $ 3,125,330 ---------------------------------------------------------------------------------------------- Heavy Electrical Equipment -- 1.4% 203,000 Mitsubishi Electric Corp. $ 2,771,950 ---------------------------------------------------------------------------------------------- Industrial Conglomerates -- 2.9% 102,000 Koninklijke Philips NV $ 2,780,405 27,900 Siemens AG 2,935,725 -------------- $ 5,716,130 ---------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer International Value Fund | Semiannual Report | 5/31/15 17 Schedule of Investments | 5/31/15 (unaudited) (continued) ---------------------------------------------------------------------------------------------- Shares Value ---------------------------------------------------------------------------------------------- Industrial Machinery -- 3.0% 133,400 Fujitec Co., Ltd. $ 1,551,755 52,000 GEA Group AG 2,528,758 72,500 Nabtesco Corp. 1,863,792 -------------- $ 5,944,305 -------------- Total Capital Goods $ 24,993,440 ---------------------------------------------------------------------------------------------- AUTOMOBILES & COMPONENTS -- 2.1% Tires & Rubber -- 1.2% 60,100 Bridgestone Corp. $ 2,496,076 ---------------------------------------------------------------------------------------------- Automobile Manufacturers -- 0.9% 18,400 Daimler AG $ 1,724,090 -------------- Total Automobiles & Components $ 4,220,166 ---------------------------------------------------------------------------------------------- CONSUMER DURABLES & APPAREL -- 4.5% Consumer Electronics -- 1.0% 137,900 Panasonic Corp. $ 2,022,833 ---------------------------------------------------------------------------------------------- Homebuilding -- 3.1% 102,900 Persimmon Plc $ 3,092,657 227,200 Sekisui Chemical Co., Ltd. 3,060,558 -------------- $ 6,153,215 ---------------------------------------------------------------------------------------------- Textiles -- 0.4% 566,000 Pacific Textiles Holdings, Ltd. $ 792,494 -------------- Total Consumer Durables & Apparel $ 8,968,542 ---------------------------------------------------------------------------------------------- CONSUMER SERVICES -- 1.3% Restaurants -- 1.3% 206,700 Domino's Pizza Group Plc $ 2,517,935 -------------- Total Consumer Services $ 2,517,935 ---------------------------------------------------------------------------------------------- MEDIA -- 0.9% Advertising -- 0.9% 23,200 Publicis Groupe SA $ 1,863,284 -------------- Total Media $ 1,863,284 ---------------------------------------------------------------------------------------------- RETAILING -- 1.2% Apparel Retail -- 1.2% 61,100 Hennes & Mauritz AB $ 2,409,294 -------------- Total Retailing $ 2,409,294 ---------------------------------------------------------------------------------------------- FOOD & STAPLES RETAILING -- 2.7% Drug Retail -- 1.7% 62,800 Sundrug Co., Ltd. $ 3,309,933 ---------------------------------------------------------------------------------------------- Hypermarkets & Super Centers -- 1.0% 259,900 Distribuidora Internacional de Alimentacion SA $ 2,072,189 -------------- Total Food & Staples Retailing $ 5,382,122 ---------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 18 Pioneer International Value Fund | Semiannual Report | 5/31/15 ---------------------------------------------------------------------------------------------- Shares Value ---------------------------------------------------------------------------------------------- FOOD, BEVERAGE & TOBACCO -- 5.2% Soft Drinks -- 1.0% 46,000 Suntory Beverage & Food, Ltd.* $ 1,917,865 ---------------------------------------------------------------------------------------------- Packaged Foods & Meats -- 4.2% 39,100 Danone SA $ 2,686,705 43,400 Kerry Group Plc 3,238,080 54,900 Unilever NV 2,342,773 -------------- $ 8,267,558 -------------- Total Food, Beverage & Tobacco $ 10,185,423 ---------------------------------------------------------------------------------------------- HOUSEHOLD & PERSONAL PRODUCTS -- 2.6% Household Products -- 2.6% 31,300 Henkel AG & Co. KGaA $ 3,215,420 90,800 Unicharm Corp. 2,001,413 -------------- $ 5,216,833 -------------- Total Household & Personal Products $ 5,216,833 ---------------------------------------------------------------------------------------------- HEALTH CARE EQUIPMENT & SERVICES -- 3.2% Health Care Supplies -- 1.3% 67,600 Hoya Corp. $ 2,486,065 ---------------------------------------------------------------------------------------------- Health Care Services -- 1.9% 59,400 Fresenius SE & Co. KGaA $ 3,787,198 -------------- Total Health Care Equipment & Services $ 6,273,263 ---------------------------------------------------------------------------------------------- PHARMACEUTICALS, BIOTECHNOLOGY & LIFE SCIENCES -- 9.4% Pharmaceuticals -- 7.7% 168,900 Astellas Pharma, Inc. $ 2,452,468 43,700 Novartis AG 4,498,116 11,406 Roche Holding AG 3,358,792 56,500 Shire Plc 4,893,110 -------------- $ 15,202,486 ---------------------------------------------------------------------------------------------- Life Sciences Tools & Services -- 1.7% 58,800 Gerresheimer AG $ 3,355,295 -------------- Total Pharmaceuticals, Biotechnology & Life Sciences $ 18,557,781 ---------------------------------------------------------------------------------------------- BANKS -- 8.8% Diversified Banks -- 8.8% 292,223 Banco Bilbao Vizcaya Argentaria SA $ 2,886,826 761,500 Barclays Plc 3,144,469 52,200 BNP Paribas SA 3,162,685 96,000 National Australia Bank, Ltd. 2,508,311 59,000 Sumitomo Mitsui Financial Group, Inc. 2,673,362 123,700 Swedbank AB 2,903,558 -------------- $ 17,279,211 -------------- Total Banks $ 17,279,211 ---------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer International Value Fund | Semiannual Report | 5/31/15 19 Schedule of Investments | 5/31/15 (unaudited) (continued) ---------------------------------------------------------------------------------------------- Shares Value ---------------------------------------------------------------------------------------------- DIVERSIFIED FINANCIALS -- 1.6% Diversified Capital Markets -- 1.6% 151,300 UBS Group AG $ 3,255,722 -------------- Total Diversified Financials $ 3,255,722 ---------------------------------------------------------------------------------------------- INSURANCE -- 5.7% Insurance Brokers -- 1.2% 24,200 Aon Plc* $ 2,449,524 ---------------------------------------------------------------------------------------------- Multi-line Insurance -- 3.5% 127,300 AXA SA $ 3,217,378 11,500 Zurich Insurance Group AG 3,674,723 -------------- $ 6,892,101 ---------------------------------------------------------------------------------------------- Property & Casualty Insurance -- 1.0% 18,400 ACE, Ltd. $ 1,959,232 -------------- Total Insurance $ 11,300,857 ---------------------------------------------------------------------------------------------- REAL ESTATE -- 7.0% Diversified REIT -- 2.9% 1,665,215 Hibernia Real Estate Investment Trust plc $ 2,377,949 507,700 Hibernia Real Estate Investment Trust plc* 716,090 44,172 Wereldhave NV 2,674,664 -------------- $ 5,768,703 ---------------------------------------------------------------------------------------------- Industrial REIT -- 1.4% 560,600 Goodman Group $ 2,794,884 ---------------------------------------------------------------------------------------------- Diversified Real Estate Activities -- 1.4% 91,000 Mitsui Fudosan Co., Ltd. $ 2,644,992 ---------------------------------------------------------------------------------------------- Real Estate Operating Companies -- 1.3% 83,385 Deutsche Annington Immobilien SE* $ 2,640,949 -------------- Total Real Estate $ 13,849,528 ---------------------------------------------------------------------------------------------- TECHNOLOGY HARDWARE & EQUIPMENT -- 6.7% Electronic Equipment Manufacturers -- 2.7% 371,100 Hitachi, Ltd. $ 2,532,243 1,086,000 PAX Global Technology, Ltd.* 1,963,770 512,000 Wasion Group Holdings, Ltd. 791,361 -------------- $ 5,287,374 ---------------------------------------------------------------------------------------------- Electronic Components -- 4.0% 78,700 Alps Electric Co., Ltd. $ 2,008,009 18,000 Murata Manufacturing Co., Ltd. 2,921,504 210,600 Yaskawa Electric Corp. 2,947,111 -------------- $ 7,876,624 -------------- Total Technology Hardware & Equipment $ 13,163,998 ---------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 20 Pioneer International Value Fund | Semiannual Report | 5/31/15 ---------------------------------------------------------------------------------------------- Shares Value ---------------------------------------------------------------------------------------------- SEMICONDUCTORS & SEMICONDUCTOR EQUIPMENT -- 0.8% Semiconductors -- 0.8% 33,700 SK Hynix, Inc. $ 1,535,828 -------------- Total Semiconductors & Semiconductor Equipment $ 1,535,828 ---------------------------------------------------------------------------------------------- TELECOMMUNICATION SERVICES -- 4.8% Integrated Telecommunication Services -- 1.0% 28,500 Nippon Telegraph & Telephone Corp. $ 1,981,543 ---------------------------------------------------------------------------------------------- Wireless Telecommunication Services -- 3.8% 114,000 KDDI Corp. $ 2,561,426 27,700 SoftBank Corp. 1,654,514 848,118 Vodafone Group Plc 3,318,437 -------------- $ 7,534,377 -------------- Total Telecommunication Services $ 9,515,920 ---------------------------------------------------------------------------------------------- UTILITIES -- 2.8% Electric Utilities -- 1.7% 22,800 Red Electrica Corp SA $ 1,918,712 57,300 SSE Plc 1,461,512 -------------- $ 3,380,224 ---------------------------------------------------------------------------------------------- Gas Utilities -- 1.1% 84,300 Gas Natural SDG SA $ 2,074,560 -------------- Total Utilities $ 5,454,784 ---------------------------------------------------------------------------------------------- TOTAL COMMON STOCKS (Cost $169,843,911) $ 190,351,939 ---------------------------------------------------------------------------------------------- TOTAL INVESTMENT IN SECURITIES -- 96.4% (Cost $169,843,911) (a) (b) $ 190,351,939 ---------------------------------------------------------------------------------------------- OTHER ASSETS & LIABILITIES -- 3.6% $ 7,007,579 ---------------------------------------------------------------------------------------------- TOTAL NET ASSETS -- 100.0% $ 197,359,518 ============================================================================================== * Non-income producing security. REIT Real Estate Investment Trust. (a) At May 31, 2015, the net unrealized appreciation (depreciation) on investments based on cost for federal income tax purposes of $171,226,636 was as follows: Aggregate gross unrealized appreciation for all investments in which there is an excess of value over tax cost $ 38,375,134 Aggregate gross unrealized depreciation for all investments in which there is an excess of tax cost over value (19,249,831) -------------- Net unrealized appreciation $ 19,125,303 ============== Purchases and sales of securities (excluding temporary cash investments) for the six months ended May 31, 2015, aggregated to $121,151,531 and $130,723,742, respectively. The accompanying notes are an integral part of these financial statements. Pioneer International Value Fund | Semiannual Report | 5/31/15 21 Schedule of Investments | 5/31/15 (unaudited) (continued) (b) Distributions of investments by country of issue (excluding temporary cash investments) as a percentage of total investment in securities, is as follows: Japan 30.6% United Kingdom 11.1 Switzerland 11.0 Germany 10.6 France 7.4 Australia 5.6 Spain 4.7 Netherlands 4.1 Ireland 3.3 Sweden 2.8 Jersey Channel Islands 2.6 Canada 2.3 Curacao 1.2 Bermuda 1.0 Other (individually less than 1%) 1.7 ----- 100.0% ===== TOTAL RETURN SWAP AGREEMENT --------------------------------------------------------------------------------------------------- Net Notional Pay / Obligation Expiration Unrealized Principal Counterparty Receive Entity/Index Coupon Date Appreciation --------------------------------------------------------------------------------------------------- JPY 112,506 Citibank NA Pay JPX-NIKKEI 1M LIBOR 6/5/15 $774,015 INDEX 400 +53 bps NOTE: Principal amounts are denominated in U.S. Dollars unless otherwise noted: JPY Japanese Yen Various inputs are used in determining the value of the Fund's investments. These inputs are summarized in the three broad levels listed below. Level 1 - quoted prices in active markets for identical securities. Level 2 - other significant observable inputs (Including quoted prices for similar securities, interest rates, prepayment speeds, credit risk, etc.) See Notes to Financial Statements -- Note 1A. Level 3 - significant unobservable inputs (Including the Fund's own assumptions in determining fair value of investments) See Notes to Financial Statements -- Note 1A. Generally, equity securities are categorized as Level 1, fixed income securities and senior loans as Level 2 and securities valued using fair value methods (other than prices supplied by independent pricing services or broker-dealers) are categorized as Level 3. See Notes to Financial Statements -- Note 1A. The accompanying notes are an integral part of these financial statements. 22 Pioneer International Value Fund | Semiannual Report | 5/31/15 The following is a summary of the inputs used as of May 31, 2015, in valuing the Fund's investments: ----------------------------------------------------------------------------------- Level 1 Level 2 Level 3 Total ----------------------------------------------------------------------------------- Common Stocks Energy Oil & Gas Equipment & Services $ 2,378,174 $ -- $ -- $ 2,378,174 Oil & Gas Exploration & Production 2,913,826 -- -- 2,913,826 Materials Commodity Chemicals 1,503,571 3,044,695 -- 4,548,266 Insurance Insurance Brokers 2,449,524 -- -- 2,449,524 Property & Casualty Insurance 1,959,232 -- -- 1,959,232 All Other Common Stocks* -- 176,102,917 -- 176,102,917 ----------------------------------------------------------------------------------- Total $ 11,204,327 $179,147,612 -- $190,351,939 =================================================================================== Other Financial Instruments Net unrealized depreciation on futures contracts $ (1,161,651) $ -- $ -- $ (1,161,651) Net unrealized appreciation on swap contracts -- 774,015 -- 774,015 Net unrealized depreciation on spot contracts -- (560) -- (560) ----------------------------------------------------------------------------------- Total Other Financial Instruments $ (1,161,651) $ 773,455 $ -- $ (388,196) =================================================================================== * Level 2 securities are valued using inputs/data furnished by independent pricing services using fair value factors. During the six months ended May 31, 2015, there were no transfers between Levels 1, 2 and 3. The accompanying notes are an integral part of these financial statements. Pioneer International Value Fund | Semiannual Report | 5/31/15 23 Schedule of Investments | 5/31/15 (unaudited) (continued) The following is a summary of the fair valuation of certain Fund's assets and liabilities as of May 31, 2015: --------------------------------------------------------------------------------------------- Level 1 Level 2 Level 3 Total --------------------------------------------------------------------------------------------- Assets: Futures collateral $ -- $453,900 $ -- $ 453,900 Foreign currencies, at value -- 242,273 -- 242,273 Variation margin for future contracts 44,008 -- -- 44,008 Liabilities: Swap collateral -- (238,617) -- (238,617) --------------------------------------------------------------------------------------------- Total $44,008 $457,556 $ -- $ 501,564 ============================================================================================= The accompanying notes are an integral part of these financial statements. 24 Pioneer International Value Fund | Semiannual Report | 5/31/15 Statement of Assets and Liabilities | 5/31/15 (unaudited) ASSETS: Investment in securities (cost $169,843,911) $ 190,351,939 Cash 5,929,809 Foreign currencies, at value (cost $247,675) 242,273 Futures collateral 453,900 Receivables -- Investment securities sold 3,275,448 Fund shares sold 21,385 Dividends and foreign taxes withheld 1,369,532 Interest 8,072 Variation margin for future contracts 44,008 Unrealized appreciation on swap contracts 774,015 Prepaid expenses 30,830 --------------------------------------------------------------------------------------------- Total assets $ 202,501,211 ============================================================================================= LIABILITIES: Payables -- Investment securities purchased $ 3,542,919 Fund shares repurchased 34,085 Dividends 120 Swap collateral 238,617 Net unrealized depreciation on futures contracts 1,161,651 Unrealized depreciation on spot contracts 560 Due to affiliates 70,106 Due to Pioneer Investment Management, Inc. 3,257 Trustee fees 1,093 Accrued expenses 89,285 --------------------------------------------------------------------------------------------- Total liabilities $ 5,141,693 ============================================================================================= NET ASSETS: Paid-in capital $ 289,071,048 Undistributed net investment income 903,765 Accumulated net realized loss on investments, futures contracts, swap contracts and foreign currency transactions (112,637,280) Net unrealized appreciation on investments 20,508,028 Net unrealized depreciation on futures contracts (1,161,651) Net unrealized appreciation on swap contracts 774,015 Net unrealized depreciation on forward foreign currency contracts and other assets and liabilities denominated in foreign currencies (98,407) --------------------------------------------------------------------------------------------- Total net assets $ 197,359,518 ============================================================================================= NET ASSET VALUE PER SHARE: (No par value, unlimited number of shares authorized) Class A (based on $86,019,091/3,844,406 shares) $ 22.38 Class C (based on $12,222,579/621,958 shares) $ 19.65 Class Y (based on $99,117,848/4,423,108 shares) $ 22.41 MAXIMUM OFFERING PRICE: Class A ($22.38 (divided by) 94.25%) $ 23.75 ============================================================================================= The accompanying notes are an integral part of these financial statements. Pioneer International Value Fund | Semiannual Report | 5/31/15 25 Statement of Operations (unaudited) For the Six Months Ended 5/31/15 INVESTMENT INCOME: Dividends (net of foreign taxes withheld of $222,023) $ 2,881,166 ---------------------------------------------------------------------------------------------------------- Total investment income $ 2,881,166 ---------------------------------------------------------------------------------------------------------- EXPENSES: Management fees $ 810,417 Transfer agent fees and expenses Class A 120,955 Class C 15,394 Class Y 323 Distribution fees Class A 103,080 Class C 55,948 Shareholder communications expense 58,055 Administrative reimbursement 32,603 Custodian fees 23,644 Registration fees 24,996 Professional fees 25,831 Printing expense 8,781 Fees and expenses of nonaffiliated Trustees 3,473 Miscellaneous 20,921 ---------------------------------------------------------------------------------------------------------- Total expenses $ 1,304,421 Less fees waived and expenses reimbursed by Pioneer Investment Management, Inc. (90,839) ---------------------------------------------------------------------------------------------------------- Net expenses $ 1,213,582 ---------------------------------------------------------------------------------------------------------- Net investment income $ 1,667,584 ---------------------------------------------------------------------------------------------------------- REALIZED AND UNREALIZED GAIN (LOSS) ON INVESTMENTS, FUTURES CONTRACTS, SWAP CONTRACTS AND FOREIGN CURRENCY TRANSACTIONS: Net realized gain (loss) on: Investments $ 1,486,564 Futures contracts (2,407,411) Swap contracts 1,848,706 Forward foreign currency contracts and other assets and liabilities denominated in foreign currencies (542,344) $ 385,515 ---------------------------------------------------------------------------------------------------------- Change in net unrealized appreciation (depreciation) on: Investments $ 9,014,220 Futures contracts (188,545) Swap contracts 346,016 Forward foreign currency contracts and other assets and liabilities denominated in foreign currencies 13,652 $ 9,185,343 ---------------------------------------------------------------------------------------------------------- Net gain on investments, futures contracts, written options, swap contracts and foreign currency transactions $ 9,570,858 ---------------------------------------------------------------------------------------------------------- Net increase in net assets resulting from operations $ 11,238,442 ========================================================================================================== The accompanying notes are an integral part of these financial statements. 26 Pioneer International Value Fund | Semiannual Report | 5/31/15 Statements of Changes in Net Assets ---------------------------------------------------------------------------------------------------------- Six Months Ended 5/31/15 Year Ended (unaudited) 11/30/14 ---------------------------------------------------------------------------------------------------------- FROM OPERATIONS: Net investment income $ 1,667,584 $ 9,120,807 Net realized gain on investments and foreign currency transactions 385,515 36,572,326 Change in net unrealized appreciation (depreciation) on investments and foreign currency transactions 9,185,343 (34,569,935) ---------------------------------------------------------------------------------------------------------- Net decrease in net assets resulting from operations $ 11,238,442 $ 11,123,198 ---------------------------------------------------------------------------------------------------------- DISTRIBUTIONS TO SHAREOWNERS: Net investment income: Class A ($1.23 and $0.50 per share, respectively) $ (4,545,498) $ (1,912,284) Class B* ($0.00 and $0.28 per share, respectively) -- (41,082) Class C ($1.06 and $0.34 per share, respectively) (607,330) (190,074) Class Y ($1.31 and $0.59 per share, respectively) (5,990,875) (5,869,819) ---------------------------------------------------------------------------------------------------------- Total distributions to shareowners $ (11,143,703) $ (8,013,259) ---------------------------------------------------------------------------------------------------------- FROM FUND SHARE TRANSACTIONS: Net proceeds from sale or exchange of shares $ 15,132,299 $ 21,441,174 Reinvestment of distributions 5,077,184 4,707,605 Cost of shares repurchased (19,917,067) (157,345,597) ---------------------------------------------------------------------------------------------------------- Net decrease in net assets resulting from Fund share transactions $ 292,416 $ (131,196,818) ---------------------------------------------------------------------------------------------------------- Net increase (decrease) in net assets $ 387,155 $ (128,086,879) NET ASSETS: Beginning of period 196,972,363 325,059,242 ---------------------------------------------------------------------------------------------------------- End of period $ 197,359,518 $ 196,972,363 ---------------------------------------------------------------------------------------------------------- Undistributed net investment income $ 903,765 $ 10,379,884 ========================================================================================================== * Class B shares converted to Class A shares on November 10, 2014. The accompanying notes are an integral part of these financial statements. Pioneer International Value Fund | Semiannual Report | 5/31/15 27 Statements of Changes in Net Assets (continued) ------------------------------------------------------------------------------------------------------ '15 Shares '15 Amount (unaudited) (unaudited) '14 Shares '14 Amount ------------------------------------------------------------------------------------------------------ Class A Shares sold 450,914 $ 9,940,887 418,347 $ 9,403,427 Reinvestment of distributions 208,182 4,326,027 80,981 1,812,361 Less shares repurchased (553,906) (12,088,702) (610,364) (13,731,684) ------------------------------------------------------------------------------------------------------ Net increase 105,190 $ 2,178,212 (111,036) $ (2,515,896) ====================================================================================================== Class B* Shares sold or exchanged -- $ -- 6,745 $ 140,554 Reinvestment of distributions -- -- 1,987 40,465 Less shares repurchased -- -- (161,834) (3,250,196) ------------------------------------------------------------------------------------------------------ Net decrease -- $ -- (153,102) $ (3,069,177) ====================================================================================================== Class C Shares sold 161,351 $ 3,115,798 128,228 $ 2,556,183 Reinvestment of distributions 30,978 567,517 8,833 175,685 Less shares repurchased (122,011) (2,324,543) (129,224) (2,565,734) ------------------------------------------------------------------------------------------------------ Net increase (decrease) 70,318 $ 1,358,772 7,837 $ 166,134 ====================================================================================================== Class Y Shares sold 96,767 $ 2,075,614 414,758 $ 9,341,010 Reinvestment of distributions 8,837 183,640 119,763 2,679,094 Less shares repurchased (258,825) (5,503,822) (5,908,934) (137,797,983) ------------------------------------------------------------------------------------------------------ Net decrease (153,221) $ (3,244,568) (5,374,413) $ (125,777,879) ====================================================================================================== * Class B shares converted to Class A shares on November 10, 2014. The accompanying notes are an integral part of these financial statements. 28 Pioneer International Value Fund | Semiannual Report | 5/31/15 Financial Highlights ------------------------------------------------------------------------------------------------------------------------------------ Six Months Ended Year Year Year Year Year 5/31/15 Ended Ended Ended Ended Ended (unaudited) 11/30/14 11/30/13 11/30/12 11/30/11 11/30/10 ------------------------------------------------------------------------------------------------------------------------------------ Class A Net asset value, beginning of period $ 22.34 $ 22.49 $ 18.67 $ 17.99 $ 18.72 $ 19.16 ------------------------------------------------------------------------------------------------------------------------------------ Increase (decrease) from investment operations: Net investment income (loss) $ 0.19 $ 0.63 $ 0.27 $ 0.36 $ 0.37 $ 0.24 Net realized and unrealized gain (loss) on investments 1.08 (0.28) 3.87 0.58 (0.88) (0.61) ------------------------------------------------------------------------------------------------------------------------------------ Net increase (decrease) from investment operations $ 1.27 $ 0.35 $ 4.14 $ 0.94 $ (0.51) $ (0.37) ------------------------------------------------------------------------------------------------------------------------------------ Distribution to shareowners: Net investment income $ (1.23) $ (0.50) $ (0.32) $ (0.26) $ (0.22) $ (0.07) ------------------------------------------------------------------------------------------------------------------------------------ Total distributions $ (1.23) $ (0.50) $ (0.32) $ (0.26) $ (0.22) $ (0.07) ------------------------------------------------------------------------------------------------------------------------------------ Net increase (decrease) in net asset value $ 0.04 $ (0.15) $ 3.82 $ 0.68 $ (0.73) $ (0.44) ------------------------------------------------------------------------------------------------------------------------------------ Net asset value, end of period $ 22.38 $ 22.34 $ 22.49 $ 18.67 $ 17.99 $ 18.72 ==================================================================================================================================== Total return* 6.09% 1.55% 22.50% 5.38% (2.84)% (1.94)% Ratio of net expenses to average net assets 1.45%** 1.46%(a) 1.45% 1.45% 1.45% 1.45% Ratio of net investment income (loss) to average net assets 1.58%** 2.72% 1.26% 1.89% 1.80% 1.18% Portfolio turnover rate 132%** 100% 101% 61% 66% 66% Net assets, end of period (in thousands) $ 86,019 $ 83,544 $86,602 $75,784 $79,559 $ 89,145 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Total expenses 1.67%** 1.70%(a) 1.69% 1.82% 1.77% 1.76% Net investment income (loss) 1.36%** 2.48% 1.02% 1.53% 1.48% 0.86% ==================================================================================================================================== * Assumes initial investment at net asset value at the beginning of each period, reinvestment of all distributions, the complete redemption of the investment at net asset value at the end of each period and no sales charges. Total return would be reduced if sales charges were taken into account. ** Annualized. (a) Includes interest expense of 0.01%. The accompanying notes are an integral part of these financial statements. Pioneer International Value Fund | Semiannual Report | 5/31/15 29 Financial Highlights (continued) -------------------------------------------------------------------------------------------------------------------------------- Six Months Ended Year Year Year Year Year 5/31/15 Ended Ended Ended Ended Ended (unaudited) 11/30/14 11/30/13 11/30/12 11/30/11 11/30/10 -------------------------------------------------------------------------------------------------------------------------------- Class C Net asset value, beginning of period $ 19.69 $ 19.91 $ 16.57 $ 15.97 $ 16.64 $ 17.12 -------------------------------------------------------------------------------------------------------------------------------- Increase (decrease) from investment operations: Net investment income (loss) $ 0.08 $ 0.35 $ 0.08 $ 0.18 $ 0.19 $ 0.06 Net realized and unrealized gain (loss) on investments 0.94 (0.23) 3.44 0.53 (0.80) (0.54) -------------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) from investment operations $ 1.02 $ 0.12 $ 3.52 $ 0.71 $ (0.61) $ (0.48) -------------------------------------------------------------------------------------------------------------------------------- Distribution to shareowners: Net investment income $ (1.06) $ (0.34) $ (0.18) $ (0.11) $ (0.06) $ -- -------------------------------------------------------------------------------------------------------------------------------- Total distributions $ (1.06) $ (0.34) $ (0.18) $ (0.11) $ (0.06) $ -- -------------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) in net asset value $ (0.04) $ (0.22) $ 3.34 $ 0.60 $ (0.67) $ (0.48) -------------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $ 19.65 $ 19.69 $ 19.91 $ 16.57 $ 15.97 $ 16.64 ================================================================================================================================ Total return* 5.59% 0.60% 21.43% 4.48% (3.71)% (2.80)% Ratio of net expenses to average net assets 2.35%** 2.36%(a) 2.35% 2.35% 2.35% 2.35% Ratio of net investment income (loss) to average net assets 0.69%** 1.78% 0.36% 0.99% 0.90% 0.26% Portfolio turnover rate 132%** 100% 101% 61% 66% 66% Net assets, end of period (in thousands) $12,223 $10,865 $10,826 $ 9,910 $10,523 $ 12,126 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Total expenses 2.38%** 2.44%(a) 2.41% 2.63% 2.52% 2.58% Net investment income (loss) 0.66%** 1.70% 0.30% 0.71% 0.73% 0.02% ================================================================================================================================ * Assumes initial investment at net asset value at the beginning of each period, reinvestment of all distributions, the complete redemption of the investment at net asset value at the end of each period and no sales charges. Total return would be reduced if sales charges were taken into account. ** Annualized. (a) Includes interest expense of 0.01%. The accompanying notes are an integral part of these financial statements. 30 Pioneer International Value Fund | Semiannual Report | 5/31/15 ------------------------------------------------------------------------------------------------------------------------------------ Six Months Ended Year Year Year Year Year 5/31/15 Ended Ended Ended Ended Ended (unaudited) 11/30/14 11/30/13 11/30/12 11/30/11 11/30/10 ------------------------------------------------------------------------------------------------------------------------------------ Class Y Net asset value, beginning of period $ 22.41 $ 22.56 $ 18.73 $ 18.07 $ 18.80 $ 19.22 ------------------------------------------------------------------------------------------------------------------------------------ Increase (decrease) from investment operations: Net investment income (loss) $ 0.23 $ 1.29 $ 0.37 $ 0.41 $ 0.44 $ 0.30 Net realized and unrealized gain (loss) on investments 1.08 (0.85) 3.87 0.60 (0.87) (0.59) ------------------------------------------------------------------------------------------------------------------------------------ Net increase (decrease) from investment operations $ 1.31 $ 0.44 $ 4.24 $ 1.01 $ (0.43) $ (0.29) ------------------------------------------------------------------------------------------------------------------------------------ Distribution to shareowners: Net investment income $ (1.31) $ (0.59) $ (0.41) $ (0.35) $ (0.30) $ (0.13) ------------------------------------------------------------------------------------------------------------------------------------ Total distributions $ (1.31) $ (0.59) $ (0.41) $ (0.35) $ (0.30) $ (0.13) ------------------------------------------------------------------------------------------------------------------------------------ Net increase (decrease) in net asset value $ -- $ (0.15) $ 3.83 $ 0.66 $ (0.73) $ (0.42) ------------------------------------------------------------------------------------------------------------------------------------ Net asset value, end of period $ 22.41 $ 22.41 $ 22.56 $ 18.73 $ 18.07 $ 18.80 ==================================================================================================================================== Total return* 6.30% 1.94% 23.02% 5.79% (2.39)% (1.51)% Ratio of net expenses to average net assets 1.00%** 1.06%(a) 1.04% 1.01% 1.01% 1.01% Ratio of net investment income (loss) to average net assets 2.02%** 3.89% 1.69% 2.35% 2.26% 1.63% Portfolio turnover rate 132%** 100% 101% 61% 66% 66% Net assets, end of period (in thousands) $ 99,118 $102,563 $224,523 $216,217 $189,321 $195,147 ==================================================================================================================================== * Assumes initial investment at net asset value at the beginning of each period, reinvestment of all distributions, the complete redemption of the investment at net asset value at the end of each period and no sales charges. Total return would be reduced if sales charges were taken into account. ** Annualized. (a) Includes interest expense of 0.01%. The accompanying notes are an integral part of these financial statements. Pioneer International Value Fund | Semiannual Report | 5/31/15 31 Notes to Financial Statements | 5/31/15 (unaudited) 1. Organization and Significant Accounting Policies Pioneer International Value Fund (the Fund) is the sole portfolio comprising Pioneer Series Trust VIII, 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 long-term growth of capital. During the periods covered by this report, the Fund offered three classes of shares designated as Class A, Class C and Class Y shares. Class Y shares commenced operations on April 15, 2009. The Fund ceased to offer Class B shares on November 10, 2014. Class B shares were converted to Class A shares as of the close of business on November 10, 2014. Each class of shares represents an interest in the same portfolio of investments of the Fund and has identical rights (based on relative net asset values) to assets and liquidation proceeds. Share classes can bear different rates of class-specific fees and expenses such as transfer agent and distribution fees. Differences in class-specific fees and expenses will result in differences in net investment income and, therefore, the payment of different dividends from net investment income earned by each class. The Amended and Restated Declaration of Trust of the Fund gives the Board the flexibility to specify either per-share voting or dollar-weighted voting when submitting matters for shareholder approval. Under per-share voting, each share of a class of the Fund is entitled to one vote. Under dollar-weighted voting, a shareholder's voting power is determined not by the number of shares owned, but by the dollar value of the shares on the record date. Each share class has exclusive voting rights with respect to matters affecting only that class, including with respect to the distribution plan for that class. There is no distribution plan for Class Y shares. The Fund's financial statements have been prepared in conformity with U.S. generally accepted accounting principles that require the management of the Fund to, among other things, make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of income, expenses and gain or loss on investments during the reporting period. Actual results could differ from those estimates. 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: 32 Pioneer International Value Fund | Semiannual Report | 5/31/15 A. Security Valuation Security transactions are recorded as of trade date. The net asset value of the Fund is computed once daily, on each day the New York Stock Exchange (NYSE) is open, as of the close of regular trading on the NYSE. In computing the net asset value, securities that have traded on an exchange are valued using the last sale price on the principal exchange where they are traded. Securities that have not traded on the date of valuation, or securities for which sale prices are not available, generally are valued using the mean between the last bid and asked prices. Shares of money market mutual funds are valued at such funds' net asset value. The Fund invests primarily in securities of non-U.S. issuers. The principal exchanges and markets for such securities have closing times prior to the close of the NYSE. However, the value of these securities may be influenced by changes in global markets occurring after the closing times of the local exchanges and markets up to the time the Fund determines its net asset value. Consequently, the Board of Trustees of the Fund has determined that daily adjustments to the valuation of securities of non-U.S. issuers by utilizing an independent pricing service that supplies an appropriate fair value factor is appropriate for the Fund. Securities for which independent pricing services are unable to supply prices or for which market prices and/or quotations are not readily available or are considered to be unreliable are valued by a fair valuation team comprised of certain personnel of Pioneer Investment Management, Inc. (PIM), the Fund's investment adviser, pursuant to procedures adopted by the Fund's Board of Trustees. PIM's fair valuation team uses fair value methods approved by the Valuation Committee of the Board of Trustees. PIM's fair valuation team is responsible for monitoring developments that may impact fair valued securities and for discussing and assessing fair value on an ongoing basis, and at least quarterly, with the Valuation Committee of the Board of Trustees. Inputs used when applying fair value methods to value a security may include credit ratings, the financial condition of the company, current market conditions and comparable securities. The Fund may use fair value methods if it is determined that a significant event has occurred after the close of the exchange or market on which the security trades and prior to the determination of the Fund's net asset value. Examples of a significant event might include political or economic news, corporate restructurings, natural disasters, terrorist activity or trading halts. Thus, the valuation of the Fund's securities may differ significantly from exchange prices and such differences could be material. Pioneer International Value Fund | Semiannual Report | 5/31/15 33 At May 31, 2015, there were no securities valued using fair value methods (other than securities valued using prices supplied by independent pricing services or broker-dealers). B. Investment Income and Transactions Dividend income is recorded on the ex-dividend date, except that certain dividends from foreign securities where the ex-dividend date may have passed are recorded as soon as the Fund becomes aware of the ex-dividend data in the exercise of reasonable diligence. Interest income, including interest on income-bearing cash accounts, is recorded on the accrual basis. Dividend and interest income are reported net of unrecoverable foreign taxes withheld at the applicable country rates. Gains and losses on sales of investments are calculated on the identified cost method for both financial reporting and federal income tax purposes. C. Foreign Currency Translation The books and records of the Fund are maintained in U.S. dollars. Amounts denominated in foreign currencies are translated into U.S. dollars using current exchange rates. Net realized gains and losses on foreign currency transactions, if any, represent, among other things, the net realized gains and losses on foreign currency contracts, disposition of foreign currencies and the difference between the amount of income accrued and the U.S. dollars actually received. Further, the effects of changes in foreign currency exchange rates on investments are not segregated in the Statement of Operations from the effects of changes in the market price of those securities but are included with the net realized and unrealized gain or loss on investments. D. Forward Foreign Currency Contracts The Fund may enter into forward foreign currency contracts (contracts) for the purchase or sale of a specific foreign currency at a fixed price on a future date. All contracts are marked to market daily at the applicable exchange rates, and any resulting unrealized appreciation or depreciation are recorded in the Fund's financial statements. The Fund records realized gains and losses at the time a contract is offset by entry into a closing transaction or extinguished by delivery of the currency. Risks may arise upon entering into these contracts from the potential inability of counterparties to meet the terms of the contract and from unanticipated movements in the value of foreign currencies relative to the U.S. dollar (see Note 6). 34 Pioneer International Value Fund | Semiannual Report | 5/31/15 E. Federal Income Taxes It is the Fund's policy to comply with the requirements of the Internal Revenue Code applicable to regulated investment companies and to distribute all of its taxable income and net realized capital gains, if any, to its shareowners. Therefore, no provision for federal income taxes is required. As of November 30, 2014, the Fund did not accrue any interest or penalties with respect to uncertain tax positions, which, if applicable, would be recorded as an income tax expense in the Statement of Operations. Tax returns filed within the prior three years remain subject to examination by federal and state tax authorities. In addition to the requirements of the Internal Revenue Code, the Fund may also be required to pay local taxes on the recognition of capital gains and/or the repatriation of foreign currencies in certain countries. During the year ended November 30, 2014, the Fund paid no such taxes. 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 November 30, 2014 were as follows: --------------------------------------------------------------------------- 2014 --------------------------------------------------------------------------- Distribution paid from: Ordinary income $8,013,259 --------------------------------------------------------------------------- Total $8,013,259 =========================================================================== The following shows the components of distributable earnings on a federal income tax basis at November 30, 2014: --------------------------------------------------------------------------- 2014 --------------------------------------------------------------------------- Distributable earnings: Undistributed ordinary income $ 11,006,670 Capital loss carryforward (111,838,946) Net unrealized appreciation 9,026,007 --------------------------------------------------------------------------- Total $ (91,806,269) =========================================================================== Pioneer International Value Fund | Semiannual Report | 5/31/15 35 The difference between book-basis and tax-basis net unrealized appreciation is attributable to the tax deferral of losses on wash sales, adjustments relating to PFICs, and the mark to market of swaps and futures contracts. F. Fund Shares The Fund records sales and repurchases of its shares as of trade date. Pioneer Funds Distributor, Inc. (PFD), the principal underwriter for the Fund and a wholly owned indirect subsidiary of UniCredit S.p.A. (UniCredit), earned $6,985 in underwriting commissions on the sale of Class A shares during the six months ended May 31, 2015. G. Class Allocations Income, common expenses and realized and unrealized gains and losses are calculated at the Fund level and allocated daily to each class of shares based on its respective percentage of adjusted net assets at the beginning of the day. Distribution fees are calculated based on the average daily net asset value attributable to Class A and Class C shares of the Fund, respectively (see Note 4). Class Y shares do not pay distribution fees. All expenses and fees paid to the transfer agent, Pioneer Investment Management Shareholder Services, Inc. (PIMSS), for its services are allocated among the classes of shares based on the number of accounts in each class and the ratable allocation of related out-of-pocket expenses (see Note 3). Distributions to shareowners are recorded as of the ex-dividend date. Distributions paid by the Fund with respect to each class of shares are calculated in the same manner and at the same time except that net investment income dividends to Class A, Class C and Class Y shares can reflect different transfer agent and distribution expense rates. H. Risks Investing in foreign and/or emerging markets securities involves risks relating to interest rates, currency exchange rates and economic and political conditions. The Fund may invest a substantial amount of its assets in issuers located in a limited number of countries and therefore is susceptible to adverse economic, political or regulatory developments affecting those countries. 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. 36 Pioneer International Value Fund | Semiannual Report | 5/31/15 I. Repurchase Agreements With respect to repurchase agreements entered into by the Fund, the value of the underlying securities (collateral), including accrued interest, is required to be equal to or in excess of the repurchase price. The collateral for all repurchase agreements is held in safekeeping in the customer-only account of the Fund's custodian or a subcustodian of the Fund. PIM is responsible for determining that the value of the collateral remains at least equal to the repurchase price. During the six months ended May 31, 2015, the Fund had no open repurchase agreements. J. Futures Contracts The Fund may enter into futures transactions in order to attempt to hedge against changes in interest rates, securities prices and currency exchange rates or to seek to increase total return. Futures contracts are types of derivatives. All futures contracts entered into by the Fund are traded on a futures exchange. Upon entering into a futures contract, the Fund is required to deposit with a broker an amount of cash or securities equal to the minimum "initial margin" requirements of the associated futures exchange. The amount of cash deposited with the broker as collateral at May 31, 2015 was $453,900. Subsequent payments for futures contracts ("variation margin") are paid or received by the Fund, depending on the daily fluctuation in the value of the contracts, and are recorded by the Fund as unrealized gains or losses. When the contract is closed, the Fund realizes a gain or loss equal to the difference between the opening and closing value of the contract as well as any fluctuation in foreign currency exchange rates where applicable. Futures contracts are subject to market risk, interest rate risk and currency exchange rate risk. Changes in value of the contracts may not directly correlate to the changes in value of the underlying securities. With futures, there is minimal counterparty credit risk to the Fund since futures are exchange-traded and the exchange's clearinghouse, as counterparty to all exchange-traded futures, guarantees the futures against default. The average value of contracts open during the six months ended May 31, 2015 was $12,955,967. At May 31, 2015, open futures contracts were as follows: --------------------------------------------------------------------------- Number of Contracts Settlement Unrealized Type Long/(Short) Month Value Depreciation --------------------------------------------------------------------------- TOPIX Index Future (103) 6/15 ($13,875,045) ($1,161,651) --------------------------------------------------------------------------- Total ($1,161,651) =========================================================================== Pioneer International Value Fund | Semiannual Report | 5/31/15 37 K. Total Return Swap Agreements The Fund may enter into a total return swap to attempt to manage and/or gain exposure to a security or market. Pursuant to a total return swap agreement, the Fund negotiates with a counterparty to exchange a periodic stream of payments. One party makes payments based on the total return of a reference asset (such as a security or a basket of securities or securities index), and in return receives fixed or floating rate interest payments. The total return of the reference asset typically includes appreciation or depreciation on the reference asset, plus any interest or dividend payments. To the extent that the total return of the reference asset exceeds or falls short of the offsetting interest rate obligation, the Fund will receive a payment from or make a payment to the counterparty. Total return swap contracts are marked-to-market daily using valuations supplied by independent sources and the change in value, if any, is recorded as unrealized appreciation or depreciation in the Statement of Assets and Liabilities. Payments received or made are recorded as realized gains or losses in the Statement of Operations. Total return swap contracts are subject to counterparty risk and unanticipated movements in value of exchange rates, interest rates, securities or the index. Open total return swap contracts at May 31, 2015 are listed in the Schedule of Investments. The average value of swap contracts open during the six months ended May 31, 2015 was $369,723. 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 0.85% of the Fund's average daily net assets up to $500 million and 0.75% of the excess over $500 million. For the six months ended May 31, 2015, the effective management fee (excluding waivers and/or assumptions of expenses) was equivalent to 0.85% of the Fund's average daily net assets. PIM has contractually agreed to limit ordinary operating expenses to the extent required to reduce Fund expenses to 1.45% and 2.35%, of the average daily net assets attributable to Class A and Class C shares, respectively. Fees waived and expenses reimbursed during the six months ended May 31, 2015 are reflected on the Statement of Operations. Class Y shares do not have an expense limitation. These expense limitations are in effect through April 1, 2016. There can be no assurance that PIM will extend the expense limitation agreement for a class of shares beyond the date referred to above. In addition, under the management and administration agreements, certain other services and costs, including accounting, regulatory reporting and insurance premiums, are paid by the Fund as administrative reimbursements. 38 Pioneer International Value Fund | Semiannual Report | 5/31/15 Included in "Due to affiliates" reflected on the Statement of Assets and Liabilities is $19,043 in management fees, administrative costs and certain other reimbursements payable to PIM at May 31, 2015. 3. Transfer Agent PIMSS, a wholly owned indirect subsidiary of UniCredit, provides substantially all transfer agent and shareowner services to the Fund at negotiated rates. In addition, the Fund reimburses PIMSS for out-of-pocket expenses incurred by PIMSS related to shareholder communications activities such as proxy and statement mailings, outgoing phone calls and omnibus relationship contracts. For the six months ended May 31, 2015, such out-of-pocket expenses by class of shares were as follows: ------------------------------------------------------------------------------- Shareholder Communications: ------------------------------------------------------------------------------- Class A $51,689 Class C 6,366 ------------------------------------------------------------------------------- Total $58,055 =============================================================================== Included in "Due to affiliates" reflected on the Statement of Assets and Liabilities is $47,332 in transfer agent fees and out-of-pocket reimbursements payable to PIMSS at May 31, 2015. 4. Distribution Plan The Fund has adopted a Distribution Plan pursuant to Rule 12b-1 of the Investment Company Act of 1940 with respect to its Class A and Class C shares. Pursuant to the Plan, the Fund pays PFD 0.25% of the average daily net assets attributable to Class A shares as compensation for personal services and/or account maintenance services or distribution services with regard to Class A shares. Pursuant to the Plan, the Fund also pays PFD 1.00% of the average daily net assets attributable to Class C shares. The fee for Class C shares consists of a 0.25% service fee and a 0.75% distribution fee paid as compensation for personal services and/or account maintenance services or distribution services with regard to Class C shares. Included in "Due to affiliates" reflected on the Statement of Assets and Liabilities is $3,731 in distribution fees payable to PFD at May 31, 215. In addition, redemptions of each class of shares (except Class Y shares) may be subject to a contingent deferred sales charge (CDSC). A CDSC of 1.00% may be imposed on redemptions of certain net asset value purchases of Class A shares within 12 months of purchase. Redemptions of Class C shares within 12 months of purchase are subject to a CDSC of 1.00%, based on the lower of cost or market value of shares being redeemed. Shares purchased as part of an Pioneer International Value Fund | Semiannual Report | 5/31/15 39 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 May 31, 2015, CDSCs in the amount of $13,808 were paid to PFD. 5. Expense Offset Arrangements The Fund has entered into certain expense offset arrangements with PIMSS which may result in a reduction in the Fund's total expenses, due to interest earned on cash held by PIMSS. For the six months ended May 31, 2015, the Fund's expenses were not reduced under such arrangements. 6. Forward Foreign Currency Contracts At May 31, 2015, the Fund had entered into various forward foreign currency contracts that obligate the Fund to deliver or take delivery of currencies at specified future maturity dates. Alternatively, prior to the settlement date of a forward foreign currency contract, the Fund may close out such contract by entering into an offsetting contract. The average value of forward foreign currency contracts open during the six months ended May 31, 2015 was $785,684. There are no open forward foreign currency contracts at May 31, 2015. 7. Line of Credit Facility The Fund, along with certain other funds in the Pioneer Family of Funds (the Funds), participates in a committed, unsecured revolving line of credit facility. Borrowings are used solely for temporary or emergency purposes. The Fund may borrow up to the lesser of the amount available under the facility or the limits set for borrowing by the Fund's prospectus and the 1940 Act. The credit facility in effect during the six months ended May 31, 2015, was 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 0.85% (0.90% prior to February 12, 2014) on an annualized basis, or the Alternate Base Rate, which is the greater of (a) the facility's administrative agent's daily announced prime rate on the borrowing date, (b) 2% plus the Federal Funds Rate on the borrowing date and (c) 2% plus the overnight 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 May 31, 2015, the Fund had no outstanding borrowings. 40 Pioneer International Value Fund | Semiannual Report | 5/31/15 8. Assets and Liabilities Offsetting Financial instruments subject to an enforceable master netting agreement have been offset on the Statement of Assets and Liabilities. The following charts show gross assets and liabilities of the Fund as of May 31, 2015. -------------------------------------------------------------------------------------------------- Assets: Net Gross Amounts Gross Amounts Amounts of Assets Not Offset in Offset Presented the Statement of in the in the Assets and Liabilities Gross Statement Statement ------------------------------------- Amounts of of Assets of Assets Cash Recognized and and Financial Collateral Net Description Assets Liabilities Liabilities Instruments Received Amount -------------------------------------------------------------------------------------------------- Swap contracts $774,015 $ -- $774,015 $-- $(238,617) $535,398 -------------------------------------------------------------------------------------------------- $774,015 $ -- $774,015 $-- $(238,617) $535,398 ================================================================================================== -------------------------------------------------------------------------------------------------- Liabilities: Net Gross Amounts Gross Amounts Amounts of Assets Not Offset in Offset Presented the Statement of in the in the Assets and Liabilities Gross Statement Statement ------------------------------------- Amounts of of Assets of Assets Cash Recognized and and Financial Collateral Net Description Liabilities Liabilities Liabilities Instruments Pledged Amount -------------------------------------------------------------------------------------------------- Swap contracts $ -- $ -- $ -- $ -- $ -- $ -- -------------------------------------------------------------------------------------------------- $ -- $ -- $ -- $ -- $ -- $ -- ================================================================================================== 9. Additional Disclosures about Derivative Instruments and Hedging Activities Values of derivative instruments as of May 31, 2015 were as follows: ------------------------------------------------------------------------------------------------ Derivatives Not Accounted for as Asset Derivatives 2015 Liabilities Derivatives 2015 Hedging Instruments -------------------------------------------------------------- Under Accounting Statement of Assets Statement of Assets Standards Codification and Liabilities and Liabilities (ASC) 815 Location Value Location Value ------------------------------------------------------------------------------------------------ Swap contracts Net unrealized Net unrealized appreciation on depreciation on swap contracts $ 774,015 swap contracts $ -- Futures contracts Net unrealized Net unrealized appreciation on depreciation on futures contracts -- futures contracts 1,161,651 ------------------------------------------------------------------------------------------------ Total $ 774,015 $ 1,162,211 ================================================================================================ Pioneer International Value Fund | Semiannual Report | 5/31/15 41 The effect of derivative instruments on the Statement of Operations for the six months ended May 31, 2015 was as follows: ------------------------------------------------------------------------------------------------ Derivatives Not Realized Change in Accounted for as Gain or Unrealized Hedging Instruments (Loss) on Gain or (Loss) Under Accounting Location of Gain or (Loss) Derivatives on Derivatives Standards Codification on Derivatives Recognized Recognized Recognized (ASC) 815 in Income in Income in Income ------------------------------------------------------------------------------------------------ Forward foreign Net realized gain (loss) on forward currency contracts foreign currency contracts $ 11,921 Forward foreign Change in net unrealized currency contracts appreciation (depreciation) on forward foreign currency contracts $ 218 Futures contracts Net realized gain (loss) on futures contracts $(2,407,411) Futures contracts Change in net unrealized appreciation (depreciation) on futures contracts $(188,545) Swap contracts Net realized gain (loss) on swap contracts $ 1,848,706 Swap contracts Change in net unrealized appreciation (depreciation) on swap contracts $ 346,016 10. Change in Independent Registered Public Accounting Firm The Board of Trustees of the Fund, with the approval and recommendation of the Audit Committee, appointed Deloitte & Touche LLP to serve as the Trust's independent registered public accounting firm. Deloitte & Touche LLP replaced Ernst & Young LLP, which resigned as the Trust's independent registered public accounting firm, effective upon completion of the audit of the Trust's financial statements for the fiscal year ended November 30, 2013. During the periods that Ernst & Young LLP served as the Fund's independent registered public accounting firm, including the Fund's fiscal years ending November 30, 2013 and November 30, 2012, Ernst & Young LLP's reports on the financial statements of the Fund have not contained an adverse opinion or disclaimer of opinion and have not been qualified or modified as to uncertainty, audit scope or accounting principles. Further, there have been no disagreements with Ernst & Young LLP on any matter of accounting principles or practices, financial statement disclosure, or auditing scope or procedure, which, if not resolved to the satisfaction of Ernst & Young LLP would have caused Ernst & Young LLP to make reference to the subject matter of the disagreement in connection with its report on the financial statements. In addition, there have been no reportable events of the kind described in Item 304(a)(1)(v) of Regulation S-K under the Securities Exchange Act of 1934. 42 Pioneer International Value Fund | Semiannual Report | 5/31/15 11. Conversion of Class B Shares As of the close of business on November 10, 2014 (the "Conversion Date"), all outstanding Class B shares of the Fund were converted to Class A shares. 12. Additional Information PIM, the Fund's investment adviser, is currently an indirect, wholly-owned subsidiary of UniCredit. On April 23, 2015, UniCredit announced that it signed a preliminary and exclusive agreement with Banco Santander and affiliates of Warburg Pincus and General Atlantic (the "Private Equity Firms") with respect to Pioneer Investments ("Pioneer") and Santander Asset Management ("SAM") (the "Transaction"). The Transaction, as described in the UniCredit announcement, will entail the establishment of a holding company, with the name Pioneer Investments, to be owned by UniCredit (50%) and the Private Equity Firms (50% between them). The holding company will control Pioneer's U.S. operations, including the Adviser. The holding company also will own 66.7% of Pioneer's and SAM's combined operations outside the U.S., while Banco Santander will own directly the remaining 33.3% stake. The completion of the Transaction is subject to the signing of a definitive agreement, as well as certain regulatory and corporate approvals, and other conditions. Under the Investment Company Act of 1940, completion of the Transaction will cause the Fund's investment advisory agreement with the Adviser to terminate. In connection with the Transaction, the Fund's Board of Trustees will be asked to approve a new investment advisory agreement for the Fund. If approved by the Board, the Fund's new investment advisory agreement will be submitted to the shareholders of the Fund for their approval. Pioneer International Value Fund | Semiannual Report | 5/31/15 43 Trustees, Officers and Service Providers Trustees Advisory Trustee Thomas J. Perna, Chairman Lorraine H. Monchak* David R. Bock Benjamin M. Friedman Officers Margaret B.W. Graham Lisa M. Jones, President and Chief Marguerite A. Piret Executive Officer Fred J. Ricciardi Mark E. Bradley, Treasurer and Kenneth J. Taubes Chief Financial Officer Christopher J. Kelley, Secretary and Chief Legal Officer Investment Adviser and Administrator Pioneer Investment Management, Inc. Custodian and Sub-Administrator Brown Brothers Harriman & Co. Principal Underwriter Pioneer Funds Distributor, Inc. Legal Counsel Morgan, Lewis & Bockius LLP Shareowner Services and Transfer Agent Pioneer Investment Management Shareholder Services, Inc. Proxy Voting Policies and Procedures of the Fund are available without charge, upon request, by calling our toll free number (1-800-225-6292). Information regarding how the Fund voted proxies relating to portfolio securities during the most recent 12-month period ended June 30 is publicly available to shareowners at us.pioneerinvestments.com. This information is also available on the Securities and Exchange Commission's web site at www.sec.gov. * Ms. Monchak is a non-voting Advisory Trustee. 44 Pioneer International Value Fund | Semiannual Report | 5/31/15 How to Contact Pioneer We are pleased to offer a variety of convenient ways for you to contact us for assistance or information. Call us for: -------------------------------------------------------------------------------- Account Information, including existing accounts, new accounts, prospectuses, applications and service forms 1-800-225-6292 FactFone(SM) for automated fund yields, prices, account information and transactions 1-800-225-4321 Retirement plans information 1-800-622-0176 Write to us: -------------------------------------------------------------------------------- PIMSS, Inc. P.O. Box 55014 Boston, Massachusetts 02205-5014 Our toll-free fax 1-800-225-4240 Our internet e-mail address ask.pioneer@pioneerinvestments.com (for general questions about Pioneer only) Visit our web site: us.pioneerinvestments.com This report must be preceded or accompanied by a prospectus. The Fund files a complete schedule of investments with the Securities and Exchange Commission for the first and third quarters for each fiscal year on Form N-Q. Shareholders may view the filed Form N-Q by visiting the Commission's web site at http://www.sec.gov. The filed form may also be viewed and copied at the Commission's Public Reference Room in Washington, DC. Information regarding the operations of the Public Reference Room may be obtained by calling 1-800-SEC-0330. [LOGO] PIONEER Investments(R) Pioneer Investment Management, Inc. 60 State Street Boston, MA 02109 us.pioneerinvestments.com Securities offered through Pioneer Funds Distributor, Inc. 60 State Street, Boston, MA 02109 Underwriter of Pioneer Mutual Funds, Member SIPC (C) 2015 Pioneer Investments 19390-09-0715 ITEM 2. CODE OF ETHICS. (a) Disclose whether, as of the end of the period covered by the report, the registrant has adopted a code of ethics that applies to the registrant's principal executive officer, principal financial officer, principal accounting officer or controller, or persons performing similar functions, regardless of whether these individuals are employed by the registrant or a third party. If the registrant has not adopted such a code of ethics, explain why it has not done so. The registrant has adopted, as of the end of the period covered by this report, a code of ethics that applies to the registrant's principal executive officer, principal financial officer, principal accounting officer and controller. (b) For purposes of this Item, the term "code of ethics" means written standards that are reasonably designed to deter wrongdoing and to promote: (1) Honest and ethical conduct, including the ethical handling of actual or apparent conflicts of interest between personal and professional relationships; (2) Full, fair, accurate, timely, and understandable disclosure in reports and documents that a registrant files with, or submits to, the Commission and in other public communications made by the registrant; (3) Compliance with applicable governmental laws, rules, and regulations; (4) The prompt internal reporting of violations of the code to an appropriate person or persons identified in the code; and (5) Accountability for adherence to the code. (c) The registrant must briefly describe the nature of any amendment, during the period covered by the report, to a provision of its code of ethics that applies to the registrant's principal executive officer, principal financial officer, principal accounting officer or controller, or persons performing similar functions, regardless of whether these individuals are employed by the registrant or a third party, and that relates to any element of the code of ethics definition enumerated in paragraph (b) of this Item. The registrant must file a copy of any such amendment as an exhibit pursuant to Item 10(a), unless the registrant has elected to satisfy paragraph (f) of this Item by posting its code of ethics on its website pursuant to paragraph (f)(2) of this Item, or by undertaking to provide its code of ethics to any person without charge, upon request, pursuant to paragraph (f)(3) of this Item. The registrant has made no amendments to the code of ethics during the period covered by this report. (d) If the registrant has, during the period covered by the report, granted a waiver, including an implicit waiver, from a provision of the code of ethics to the registrant's principal executive officer, principal financial officer, principal accounting officer or controller, or persons performing similar functions, regardless of whether these individuals are employed by the registrant or a third party, that relates to one or more of the items set forth in paragraph (b) of this Item, the registrant must briefly describe the nature of the waiver, the name of the person to whom the waiver was granted, and the date of the waiver. Not applicable. (e) If the registrant intends to satisfy the disclosure requirement under paragraph (c) or (d) of this Item regarding an amendment to, or a waiver from, a provision of its code of ethics that applies to the registrant's principal executive officer, principal financial officer, principal accounting officer or controller, or persons performing similar functions and that relates to any element of the code of ethics definition enumerated in paragraph (b) of this Item by posting such information on its Internet website, disclose the registrant's Internet address and such intention. Not applicable. (f) The registrant must: (1) File with the Commission, pursuant to Item 12(a)(1), a copy of its code of ethics that applies to the registrant's principal executive officer,principal financial officer, principal accounting officer or controller, or persons performing similar functions, as an exhibit to its annual report on this Form N-CSR (see attachment); (2) Post the text of such code of ethics on its Internet website and disclose, in its most recent report on this Form N-CSR, its Internet address and the fact that it has posted such code of ethics on its Internet website; or (3) Undertake in its most recent report on this Form N-CSR to provide to any person without charge, upon request, a copy of such code of ethics and explain the manner in which such request may be made. 	See Item 10(2) ITEM 3. AUDIT COMMITTEE FINANCIAL EXPERT. (a) (1) Disclose that the registrant's board of trustees has determined that the registrant either: (i) Has at least one audit committee financial expert serving on its audit committee; or (ii) Does not have an audit committee financial expert serving on its audit committee. The registrant's Board of Trustees has determined that the registrant has at least one audit committee financial expert. (2) If the registrant provides the disclosure required by paragraph (a)(1)(i) of this Item, it must disclose the name of the audit committee financial expert and whether that person is "independent." In order to be considered "independent" for purposes of this Item, a member of an audit committee may not, other than in his or her capacity as a member of the audit committee, the board of trustees, or any other board committee: (i) Accept directly or indirectly any consulting, advisory, or other compensatory fee from the issuer; or (ii) Be an "interested person" of the investment company as defined in Section 2(a)(19) of the Act (15 U.S.C. 80a-2(a)(19)). Ms. Marguerite A. Piret, an independent trustee, is such an audit committee financial expert. (3) If the registrant provides the disclosure required by paragraph (a)(1) (ii) of this Item, it must explain why it does not have an audit committee financial expert. Not applicable. ITEM 4. PRINCIPAL ACCOUNTANT FEES AND SERVICES. (a) Disclose, under the caption AUDIT FEES, the aggregate fees billed for each of the last two fiscal years for professional services rendered by the principal accountant for the audit of the registrant's annual financial statements or services that are normally provided by the accountant in connection with statutory and regulatory filings or engagements for those fiscal years. Not applicable. (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. Not applicable. (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. Not applicable. (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. Not applicable. (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. Not applicable. (f) If greater than 50 percent, disclose the percentage of hours expended on the principal accountants engagement to audit the registrant's financial statements for the most recent fiscal year that were attributed to work performed by persons other than the principal accountant's full-time, permanent employees. N/A (g) Disclose the aggregate non-audit fees billed by the registrants accountant for services rendered to the registrant, and rendered to the registrants investment adviser (not including any sub-adviser whose role is primarily portfolio management and is subcontracted with or overseen by another investment adviser), and any entity controlling, controlled by, or under common control with the adviser that provides ongoing services to the registrant for each of the last two fiscal years of the registrant. Not applicable. (h) Disclose whether the registrants audit committee of the board of trustees has considered whether the provision of non-audit services that were rendered to the registrants investment adviser (not including any subadviser whose role is primarily portfolio management and is subcontracted with or overseen by another investment adviser), and any entity controlling, controlled by, or under common control with the investment adviser that provides ongoing services to the registrant that were not pre-approved pursuant to paragraph (c)(7)(ii) of Rule 2-01 of Regulation S-X is compatible with maintaining the principal accountant's independence. The Fund's audit committee of the Board of Fundees has considered whether the provision of non-audit services that were rendered to the Affiliates (as defined) that were not pre-approved pursuant to paragraph (c)(7)(ii) of Rule 2-01 of Regulation S-X is compatible with maintaining the principal accountant's independence. ITEM 5. AUDIT COMMITTEE OF LISTED REGISTRANTS (a) If the registrant is a listed issuer as defined in Rule 10A-3 under the Exchange Act (17 CFR 240.10A-3), state whether or not the registrant has a separately-designated standing audit committee established in accordance with Section 3(a)(58)(A) of the Exchange Act (15 U.S.C. 78c(a)(58)(A)). If the registrant has such a committee, however designated, identify each committee member. If the entire board of directors is acting as the registrant's audit committee as specified in Section 3(a)(58)(B) of the Exchange Act (15 U.S.C. 78c(a)(58)(B)), so state. N/A (b) If applicable, provide the disclosure required by Rule 10A-3(d) under the Exchange Act (17 CFR 240.10A-3(d)) regarding an exemption from the listing standards for audit committees. N/A ITEM 6. SCHEDULE OF INVESTMENTS. File Schedule of Investments in securities of unaffiliated issuers as of the close of the reporting period as set forth in 210.1212 of Regulation S-X [17 CFR 210.12-12], unless the schedule is included as part of the report to shareholders filed under Item 1 of this Form. Included in Item 1 ITEM 7. DISCLOSURE OF PROXY VOTING POLICIES AND PROCEDURES FOR CLOSED-END MANAGEMENT INVESTMENT COMPANIES. A closed-end management investment company that is filing an annual report on this Form N-CSR must, unless it invests exclusively in non-voting securities, describe the policies and procedures that it uses to determine how to vote proxies relating to portfolio securities, including the procedures that the company uses when a vote presents a conflict between the interests of its shareholders, on the one hand, and those of the company's investment adviser; principal underwriter; or any affiliated person (as defined in Section 2(a)(3) of the Investment Company Act of 1940 (15 U.S.C. 80a-2(a)(3)) and the rules thereunder) of the company, its investment adviser, or its principal underwriter, on the other. Include any policies and procedures of the company's investment adviser, or any other third party, that the company uses, or that are used on the company's behalf, to determine how to vote proxies relating to portfolio securities. Not applicable to open-end management investment companies. ITEM 8. PORTFOLIO MANAGERS OF CLOSED-END MANAGEMENT INVESTMENT COMPANIES. (a) If the registrant is a closed-end management investment company that is filing an annual report on this Form N-CSR,provide the following information: (1) State the name, title, and length of service of the person or persons employed by or associated with the registrant or an investment adviser of the registrant who are primarily responsible for the day-to-day management of the registrant's portfolio ("Portfolio Manager"). Also state each Portfolio Manager's business experience during the past 5 years. Not applicable to open-end management investment companies. ITEM 9. PURCHASES OF EQUITY SECURITIES BY CLOSED-END MANAGEMENT INVESTMENT COMPANY AND AFFILIATED PURCHASERS. (a) If the registrant is a closed-end management investment company, in the following tabular format, provide the information specified in paragraph (b) of this Item with respect to any purchase made by or on behalf of the registrant or any affiliated purchaser, as defined in Rule 10b-18(a)(3) under the Exchange Act (17 CFR 240.10b-18(a)(3)), of shares or other units of any class of the registrant's equity securities that is registered by the registrant pursuant to Section 12 of the Exchange Act (15 U.S.C. 781). Not applicable to open-end management investment companies. ITEM 10. SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS. Describe any material changes to the procedures by which shareholders may recommend nominees to the registrant's board of directors, where those changes were implemented after the registrant last provided disclosure in response to the requirements of Item 407(c)(2)(iv) of Regulation S-R(17 CFR 229.407)(as required by Item 22(b)(15)) of Schedule 14A (17 CFR 240.14a-101), or this Item. There have been no material changes to the procedures by which the shareholders may recommend nominees to the registrant's board of directors since the registrant last provided disclosure in response to the requirements of Item 407(c)(2)(iv) of Regulation S-R of Schedule 14(A) in its definitive proxy statement, or this item. ITEM 11. CONTROLS AND PROCEDURES. (a) Disclose the conclusions of the registrant's principal executive and principal financials officers, or persons performing similar functions, regarding the effectiveness of the registrant's disclosure controls and procedures (as defined in Rule 30a-3(c) under the Act (17 CFR 270.30a-3(c))) as of a date within 90 days of the filing date of the report that includes the disclosure required by this paragraph, based on the evaluation of these controls and procedures required by Rule 30a-3(b) under the Act (17 CFR 270.30(a)-3(b) and Rules 13a-15(b) or 15d-15(b) under the Exchange Act (17 CFR 240.13a-15(b) or 240.15d-15(b)). The registrant's principal executive officer and principal financial officer have concluded that the registrant's disclosure controls and procedures are effective based on the evaluation of these controls and procedures as of a date within 90 days of the filing date of this report. (b) Disclose any change in the registrant's internal control over financial reporting (as defined in Rule 30a-3(d) under the Act (17CFR 270.30a-3(d)) that occured during the second fiscal quarter of the period covered by this report that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting. There were no significant changes in the registrant's internal control over financial reporting that occurred during the second fiscal quarter of the period covered by this report that have materially affected, or are reasonably likely to materially affect, the registrant's internal control over financial reporting. The registrant's principal executive officer and principal financial officer, however, voluntarily are reporting the following information: In August of 2006 the registrant's investment adviser enhanced its internal procedures for reporting performance information required to be included in prospectuses. Those enhancements involved additional internal controls over the appropriateness of performance data generated for this purpose. Such enhancements were made following an internal review which identified prospectuses relating to certain classes of shares of a limited number of registrants where, inadvertently, performance information not reflecting the deduction of applicable sales charges was included. Those prospectuses were revised, and the revised prospectuses were distributed to shareholders. ITEM 12. EXHIBITS. (a) File the exhibits listed below as part of this Form. Letter or number the exhibits in the sequence indicated. (1) Any code of ethics, or amendment thereto, that is the subject of the disclosure required by Item 2, to the extent that the registrant intends to satisfy the Item 2 requirements through filing of an exhibit. (2) A separate certification for each principal executive officer and principal financial officer of the registrant as required by Rule 30a-2(a) under the Act (17 CFR 270.30a-2(a)) , exactly as set forth below: Filed herewith. SIGNATURES [See General Instruction F] Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. (Registrant) Pioneer Series Trust VIII By (Signature and Title)* /s/ Lisa M. Jones Lisa M. Jones, President & Chief Executive Officer Date July 29, 2015 Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated. By (Signature and Title)* /s/ Lisa M. Jones Lisa M. Jones, President & Chief Executive Officer Date July 29, 2015 By (Signature and Title)* /s/ Mark Bradley Mark Bradley, Treasurer & Chief Accounting & Financial Officer Date July 29, 2015 * Print the name and title of each signing officer under his or her signature.