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 811-21460 Pioneer Series Trust II (Exact name of registrant as specified in charter) 60 State Street, Boston, MA 02109 (Address of principal executive offices) (ZIP code) Terrence J. Cullen, Pioneer Investment Management, Inc., 60 State Street, Boston, MA 02109 (Name and address of agent for service) Registrant's telephone number, including area code: (617) 742-7825 Date of fiscal year end: November 30 Date of reporting period: December 31, 2013 through May 31, 2014 Form N-CSR is to be used by management investment companies to file reports with the Commission not later than 10 days after the transmission to stockholders of any report that is required to be transmitted to stockholders under Rule 30e-1 under the Investment Company Act of 1940 (17 CFR 270.30e-1). The Commission may use the information provided on Form N-CSR in its regulatory, disclosure review, inspection, and policymaking roles. A registrant is required to disclose the information specified by Form N-CSR, and the Commission will make this information public. A registrant is not required to respond to the collection of information contained in Form N-CSR unless the Form displays a currently valid Office of Management and Budget ("OMB") control number. Please direct comments concerning the accuracy of the information collection burden estimate and any suggestions for reducing the burden to Secretary, Securities and Exchange Commission, 450 Fifth Street, NW, Washington, DC 20549-0609. The OMB has reviewed this collection of information under the clearance requirements of 44 U.S.C. ss. 3507. ITEM 1. REPORTS TO STOCKHOLDERS. Pioneer Select Mid Cap Growth Fund -------------------------------------------------------------------------------- Semiannual Report | May 31, 2014 -------------------------------------------------------------------------------- Ticker Symbols: Class A PGOFX Class B GOFBX Class C GOFCX Class R PGRRX Class Y GROYX [LOGO] PIONEER Investments(R) visit us: us.pioneerinvestments.com Table of Contents Letter to Shareowners 2 Portfolio Management Discussion 4 Portfolio Summary 9 Prices and Distributions 10 Performance Update 11 Comparing Ongoing Fund Expenses 16 Schedule of Investments 18 Financial Statements 28 Notes to Financial Statements 37 Trustees, Officers and Service Providers 49 Pioneer Select Mid Cap Growth Fund | Semiannual Report | 5/31/14 1 President's Letter Dear Shareowner, As we move past the midway point of 2014, U.S. economic growth is still expected to exceed 2% for the full calendar year, despite the fact that U.S. gross domestic product (GDP) for the first quarter was revised down to -2.9% in May. The markets, in fact, almost completely ignored that bad news, as more timely data -- especially labor market data -- pointed to continuing economic strength. By mid-year, the number of people filing initial unemployment claims and the number of job openings were at levels last seen during the boom years of 2005 through 2007, and unemployment was down to just over 6%. Barring an external shock, we think it's likely that the domestic economic expansion will continue. A modestly improving European economy and continuing economic improvement in Japan appear likely to result in improving global economic growth in the second half of 2014, further supporting the U.S. economy. Some slack remains in the labor markets and capacity utilization, which offers the potential for continuing non-inflationary growth. The Federal Reserve System (the Fed) is widely expected to end its QE (quantitative easing) program by the end of this year, and to begin raising the Federal funds rate in 2015. The timing and pace of Fed's actions remain uncertain: Fed Chair Janet Yellen has continually stressed that Fed policy will be sensitive to incoming economic data. While the U.S. economy appears robust and the global economy seems to be improving, there are still weaknesses and risks to the economic outlook. Risks of an adverse shock also remain. Military conflicts and political tensions are widespread, with particular concerns about recent developments in the Middle East that could prove disruptive to the global oil supply. While most of the widely recognized risks may already be "priced into" the market, we caution against complacency and believe investors should continue to expect market volatility. At Pioneer, we have long advocated the benefits of staying diversified and investing for the long term. And while diversification does not assure a profit or protect against loss in a declining market, we believe there are still opportunities for prudent investors to earn attractive returns. Our advice, as always, is to work closely with a trusted financial advisor to discuss your goals and work together to develop an investment strategy that meets your individual needs, keeping in mind that there is no single best strategy that works for every investor. 2 Pioneer Select Mid Cap Growth Fund | Semiannual Report | 5/31/14 Pioneer's investment teams have, since 1928, sought out attractive opportunities in equity and bond markets, using in-depth research to identify undervalued individual securities, and using thoughtful risk management to construct portfolios which seek to balance potential risks and rewards in an ever-changing world. We encourage you to learn more about Pioneer and our time-tested approach to investing by consulting with your financial advisor or visiting us online at us.pioneerinvestments.com. We greatly appreciate your trust in us, and we thank you for investing with Pioneer. Sincerely, /s/ Daniel K. Kingsbury Daniel K. Kingsbury President and CEO Pioneer Investment Management USA, Inc. Any information in this shareholder report regarding market or economic trends or the factors influencing the Fund's historical or future performance are statements of opinion as of the date of this report. These statements should not be relied upon for any other purposes. Past performance is no guarantee of future results, and there is no guarantee that market forecasts discussed will be realized. Pioneer Select Mid Cap Growth Fund | Semiannual Report | 5/31/14 3 Portfolio Management Discussion | 5/31/14 For the six-month period ended May 31, 2014, Pioneer Select Mid Cap Growth Fund outperformed both its Lipper and Morningstar peers and performed in line with its benchmark, the Russell Midcap Growth Index (the Russell Index). In the following interview, Ken Winston reviews the investment background and details some of the decisions that drove Fund performance during the period. Mr. Winston, a vice president and portfolio manager at Pioneer, is the longest-standing member of the Fund's management team, which also includes Shaji John, a vice president and portfolio manager at Pioneer, and Jon Stephenson, a vice president and portfolio manager at Pioneer. Mr. Winston, Mr. John and Mr. Stephenson are responsible for the day-to-day management of the Fund. Q How would you describe the investment environment for equities during the six-month period ended May 31, 2014? A Stocks in general moved higher during the six-month period, overcoming notable pullbacks in February and April of 2014. April's market drop reflected a shift in investor preferences from growth to value, as growth stocks that had recorded significant gains over the previous several quarters fell while market participants sought out value-oriented stocks that appeared to be more stable. The change in focus -- known as a rotation -- hurt the Fund's performance because we usually concentrate on investing the portfolio in stocks with long-term, sustainable growth potential that tend to have higher valuations. Q How did the Fund perform during the six-month period ended May 31, 2014? A Pioneer Select Mid Cap Growth Fund's Class A shares returned 6.63% at net asset value during the six-month period ended May 31, 2014, while the Fund's benchmark, the Russell Index, returned 6.57%. During the same period, the average return of the 419 mutual funds in Lipper's Mid Cap Growth Funds category was 2.65%, and the average return of the 757 mutual funds in Morningstar's Mid Cap Growth Funds category was 3.15%. Q Which of your investment strategies or individual portfolio holdings made positive contributions to the Fund's performance during the six-month period ended May 31, 2014, and which detracted from performance? A A combination of the portfolio's overweight stance (compared with the Russell Index) in the outperforming energy sector, and underweight exposure to the laggard consumer discretionary sector helped to boost the Fund's benchmark-relative results at the sector level. Conversely, the portfolio's underweight positions in stronger-performing sectors such as utilities, telecommunication services and consumer staples reduced the Fund's benchmark-relative performance advantage. 4 Pioneer Select Mid Cap Growth Fund | Semiannual Report | 5/31/14 Stock selection results, overall, were favorable during the period, and were especially strong in health care and information technology. Selection results were also positive in energy and consumer staples, while the portfolio's holdings in the industrials and consumer discretionary sectors held back relative returns. With regard to individual positions, the top-performing stock in the portfolio during the period was Keurig Green Mountain, formerly known as Green Mountain Coffee Roasters and a long-time Fund holding. The company, which is the leading maker of single-serve coffee brewing machines, saw its shares buoyed by strong financial performance and, in particular, the announcement of an alliance with Coca Cola. The two companies are collaborating to develop a single-serve beverage system for cold drinks. Coca-Cola also made a direct equity investment in Keurig Green Mountain and now effectively owns 10 percent of the company. The Fund's shares of Goodrich Petroleum, an independent oil and gas exploration company, also rose during the period amid the ongoing shale revolution, as investors came to value the potential of the company's energy-rich acreage in the Tuscaloosa Marine Shale area and elsewhere. We continue to believe that Goodrich's holdings offer significant upside potential. In industrials, the portfolio's position in American Airlines Group performed extremely well during the period after AMR Corp., American's predecessor company, combined with US Airways. Investors began to appreciate the enhanced earnings potential and cost efficiencies of the combined company. In health care, two positions produced outstanding performance during the period, boosting the Fund's returns. One was Neurocrine Biosciences, a biopharmaceutical company focused on developing drug candidates for neurological and endocrine disorders. The company's leading product candidate is Elagolix, an oral drug that has shown positive Phase II trial data for the treatment of endometriosis and uterine fibroids. In addition, the company's share price increased sharply in January following positive Phase II results for a new drug that targets movement disorders such as Parkinson's disease. The other strong performer in health care was a position in Salix Pharmaceuticals, another long-term Fund holding. Salix is developing a suite of drugs for treating gastrointestinal disorders. The company's core product, Xifaxan, has proven effective in treating E-coli-based traveler's diarrhea. Xifaxan also aids in the treatment of hepatic encephalopathy, a condition that causes deteriorating brain function due to toxins in the blood that are normally removed by the liver. Salix also completed an acquisition during the period that has the potential to boost the company's future earnings. Pioneer Select Mid Cap Growth Fund | Semiannual Report | 5/31/14 5 As in health care, two Fund holdings keyed strong results in the information technology sector: Skyworks Solutions and F5 Networks. Skyworks Solutions has expanded its share of the market for mobile device semiconductors. Skyworks has increased the functionality of such semiconductors by effectively bundling and combining various functions -- like switching and power amplification -- onto an integrated module. The company also offers the best range of solutions for both 3G and 4G LTE as well as the various network protocols in China, North America and Europe. F5 Networks, the leading provider of network application switches, enjoyed two consecutive quarters of accelerating revenue growth as businesses and web service providers continued to upgrade their networks as applications increasingly move to the cloud. On the negative side, the Fund's relative results in health care and energy, respectively, took a hit due to the portfolio's not owning Alexion and Cheniere Energy, which were strong performers during the period. Nevertheless, the Fund outperformed the Russell Index in both sectors. Individual holdings that detracted from performance during the six-month period included Wageworks, a benefits transaction processing company that has increased its share of the market for processing flexible spending accounts such as health care and commuter discount programs. The company's financial performance was favorable over the period, but its share price fell as investors moved away from high-valuation growth stocks. That same shift in investor preferences drove down the performance of the Fund's shares of CoStar, a leading provider of information services and analytics to the commercial real estate industry, despite the company's posting strong financial results. In our opinion, both Wageworks' and CoStar's shares merit their current high valuations because of the companies' strong growth potential. In fact, we added to Wageworks' shares on weakness during the period. Another weak performer in health care was the portfolio's position in Endologix, makers of minimally invasive devices for vascular disease. The company's shares were also caught in the market rotation away from high-valuation stocks, despite good operating results. Finally, LKQ, another long-term Fund holding, underperformed during the period. LKQ is the leading provider of refurbished auto and truck parts. The company's share price fell when an independent newsletter claimed that LKQ's accounting practices with regard to acquisitions were overly aggressive. We believed the accusations were without merit, however, and the stock price recovered half its decline by the end of the period. 6 Pioneer Select Mid Cap Growth Fund | Semiannual Report | 5/31/14 Q What is your investment outlook? A Extreme weather in much of the U.S. was likely the main reason behind the U.S. economy's contraction in the first quarter of 2014. However, the domestic economy does appear to be regaining some momentum, and consensus expectations for GDP growth in 2014 remain positive. Employment gains, while still sluggish, have been improving and we think they will continue to do so. Among the possible headwinds to the economy is slowing growth in the emerging markets, particularly China, which is a major consumer of U.S. goods and materials. Political upheaval in the Ukraine has also raised investor sensitivity. We expect the Ukrainian situation to be a continued source of worry. On the whole, we take the calm environment for interest rates in the wake of Federal Reserve's tapering of its quantitative easing (QE) program as a positive sign, since it indicates that the winding down of QE may not produce the kind of jump in interest rates that many analysts had feared. A continuation of this environment would be favorable for domestic equities and has the potential to offset the effects of a dampened global growth outlook. We expect the economic recovery to reaccelerate in the second half of 2014 as the housing and labor markets continue to improve and the outlook for capital spending brightens. However, sharp changes in interest-rate expectations remain a risk. As noted previously, there currently appears to be a sharp rotation in domestic markets away from longer-term growth stocks and into value stocks. Sentiment is less favorable for portfolios that focus on non-cyclical growth potential and those that seek companies with long runways of growth--similar to the types of stocks held in the Fund's portfolio. With that said, we believe that over the next few years our anticipated economic scenario of sustainable, moderate growth and manageable inflation will mostly favor secular growth companies, which remain our primary focus when investing the Fund's assets. Note to Shareholders: Effective June 7, 2013, Pioneer Select Mid Cap Growth Fund ("the predecessor fund") reorganized with Pioneer Growth Opportunities Fund ("the reorganization"). As a result of the reorganization, Pioneer Growth Opportunities Fund was renamed Pioneer Select Mid Cap Growth Fund. The investment strategies, performance and financial history, inception date, fiscal year end, and portfolio management team of the combined Fund are that of the predecessor Pioneer Select Mid Cap Growth Fund. Pioneer Select Mid Cap Growth Fund | Semiannual Report | 5/31/14 7 Please refer to the Schedule of Investments on pages 18-27 for a full listing of Fund securities. Investments in mid-sized companies may offer the potential for higher returns, but are also subject to greater short-term price fluctuations than larger, more established companies. 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. The portfolio invests in REIT securities, the value of which can fall for a variety of reasons, such as declines in rental income, fluctuating interest rates, poor property management, environmental liabilities, uninsured damage, increased competition, or changes in real estate tax laws. Investing in foreign and/or emerging markets securities involves risks relating to interest rates, currency exchange rates, economic, and political conditions. At times, the Fund's investments may represent industries or industry sectors that are interrelated or have common risks, making it more susceptible to any economic, political, or regulatory developments or other risks affecting those industries and sectors. These risks may increase share price volatility. Past performance is no guarantee of future results, and there is no guarantee that market forecasts discussed will be realized. Any information in this shareholder report regarding market or economic trends or the factors influencing the Fund's historical or future performance are statements of opinion as of the date of this report. These statements should not be relied upon for any other purposes. 8 Pioneer Select Mid Cap Growth Fund | Semiannual Report | 5/31/14 Portfolio Summary | 5/31/14 Portfolio Diversification -------------------------------------------------------------------------------- (As a percentage of total investment portfolio) [THE FOLLOWING DATA WAS REPRESENTED AS A PIE CHART IN THE PRINTED MATERIAL] U.S. Common Stocks 90.6% International Common Stocks 8.0% Depositary Receipts for International Stocks 1.0% U.S. Corporate Bonds 0.4% Sector Distribution -------------------------------------------------------------------------------- (As a percentage of equity holdings) [THE FOLLOWING DATA WAS REPRESENTED AS A PIE CHART IN THE PRINTED MATERIAL] Consumer Discretionary 22.8% Information Technology 16.0% Industrials 15.8% Health Care 15.0% Energy 8.3% Financials 7.3% Consumer Staples 6.7% Materials 6.2% Telecommunication Services 1.0% Utilities 0.9% 10 Largest Holdings -------------------------------------------------------------------------------- (As a percentage of equity holdings)* 1. American Airlines Group, Inc. 1.90% -------------------------------------------------------------------------------- 2. Cabot Oil & Gas Corp. 1.75 -------------------------------------------------------------------------------- 3. Lear Corp. 1.74 -------------------------------------------------------------------------------- 4. Keurig Green Mountain, Inc. 1.70 -------------------------------------------------------------------------------- 5. Actavis plc 1.50 -------------------------------------------------------------------------------- 6. Goodrich Petroleum Corp. 1.48 -------------------------------------------------------------------------------- 7. Delta Air Lines, Inc. 1.40 -------------------------------------------------------------------------------- 8. The NASDAQ OMX Group, Inc. 1.37 -------------------------------------------------------------------------------- 9. Catamaran Corp. 1.35 -------------------------------------------------------------------------------- 10. F5 Networks, Inc. 1.30 -------------------------------------------------------------------------------- * 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. Pioneer Select Mid Cap Growth Fund | Semiannual Report | 5/31/14 9 Prices and Distributions | 5/31/14 Net Asset Value per Share -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- Class 5/31/14 11/30/13* -------------------------------------------------------------------------------- A $40.04 $37.55 -------------------------------------------------------------------------------- B $32.12 $30.34 -------------------------------------------------------------------------------- C $33.17 $31.23 -------------------------------------------------------------------------------- R $39.44 $37.05 -------------------------------------------------------------------------------- Y $42.00 $39.32 -------------------------------------------------------------------------------- Distributions per Share: 12/1/13-5/31/14 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- Net Investment Short-Term Long-Term Class Income Capital Gains Capital Gains -------------------------------------------------------------------------------- A $ -- $ -- $ -- -------------------------------------------------------------------------------- B $ -- $ -- $ -- -------------------------------------------------------------------------------- C $ -- $ -- $ -- -------------------------------------------------------------------------------- R $ -- $ -- $ -- -------------------------------------------------------------------------------- Y $ -- $ -- $ -- -------------------------------------------------------------------------------- Index Definition -------------------------------------------------------------------------------- The Russell Midcap Growth Index is an unmanaged index that measures the performance of U.S. mid-cap growth 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 12-16. * The Fund acquired the assets and liabilities of Pioneer Select Mid Cap Growth Fund (the "predecessor fund") on June 7, 2013 (the "reorganization"). As a result of the reorganization, the predecessor fund's performance and financial history became the performance and financial history of the Fund. Historical per-share amounts prior to June 7, 2013, have been adjusted to reflect the conversion ratios used for the reorganization. The predecessor fund did not offer Class B shares or Class R shares. Financial reporting for Class B shares and Class R shares commenced on June 7, 2013. 10 Pioneer Select Mid Cap Growth Fund | Semiannual Report | 5/31/14 Performance Update | 5/31/14 Class A Shares Investment Returns -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $10,000 investment made in Class A shares of Pioneer Select Mid Cap Growth Fund at public offering price during the periods shown, compared to that of the Russell Midcap Growth Index. Average Annual Total Returns (As of May 31, 2014) -------------------------------------------------------------------------------- Net Public Russell Asset Offering Midcap Value Price Growth Period (NAV) (POP) Index -------------------------------------------------------------------------------- 10 Years 10.09% 9.44% 9.66% 5 Years 18.08 16.69 20.53 1 Year 22.42 15.38 20.72 -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated April 1, 2014) -------------------------------------------------------------------------------- Gross -------------------------------------------------------------------------------- 1.12% -------------------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $10,000 Investment Pioneer Select Mid Russell Midcap Cap Growth Fund Growth Index 5/31/2004 $ 9,425 $ 10,000 5/31/2005 $ 10,081 $ 11,057 5/31/2006 $ 12,381 $ 12,784 5/31/2007 $ 14,075 $ 15,512 5/31/2008 $ 15,200 $ 15,390 5/31/2009 $ 10,738 $ 9,892 5/31/2010 $ 13,067 $ 12,873 5/31/2011 $ 17,396 $ 17,547 5/31/2012 $ 16,400 $ 16,439 5/31/2013 $ 20,137 $ 20,839 5/31/2014 $ 24,651 $ 25,157 Call 1-800-225-6292 or visit us.pioneerinvestments.com for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. NAV results represent the percent change in net asset value per share. Returns would have been lower had sales charges been reflected. POP returns reflect deduction of maximum 5.75% sales charge. All results are historical and assume the reinvestment of dividends and capital gains. Other share classes are available for which performance and expenses will differ. Performance results reflect any applicable expense waivers in effect during the periods shown. Without such waivers Fund performance would be lower. Waivers may not be in effect for all funds. Certain fee waivers are contractual through a specified period. Otherwise, fee waivers can be rescinded at any time. See the prospectus and financial statements for more information. The performance table and graph do not reflect the deduction of fees and taxes that a shareowner would pay on Fund distributions or the redemption of Fund shares. The Fund acquired the assets and liabilities of Pioneer Select Mid Cap Growth Fund ("the predecessor fund") on June 7, 2013 ("the reorganization"). As a result of the reorganization, the predecessor fund's performance and financial history became the performance and financial history of the Fund. The performance of Class A shares of the Fund is the performance of Class A shares of the predecessor fund for periods prior to the reorganization, and has not been restated to reflect any differences in expenses. The predecessor fund was established in connection with the reorganization of Regions Morgan Keegan Select Mid Cap Growth Fund into the predecessor fund on May 15, 2009. The performance of Class A shares of the predecessor fund for periods prior to May 15, 2009, includes the performance of Regions Morgan Keegan Select Mid Cap Growth Fund's Class A shares, which has been restated to reflect differences in any applicable sales charges (but not differences in expenses). This adjustment has the effect of reducing the previously reported performance of Regions Morgan Keegan Select Mid Cap Growth Fund. A different investment adviser served as the adviser of Regions Morgan Keegan Select Mid Cap Growth Fund. Pioneer Select Mid Cap Growth Fund | Semiannual Report | 5/31/14 11 Performance Update | 5/31/14 Class B Shares Investment Returns -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $10,000 investment made in Class B shares of Pioneer Select Mid Cap Growth Fund during the periods shown, compared to that of the Russell Midcap Growth Index. Average Annual Total Returns (As of May 31, 2014) -------------------------------------------------------------------------------- Russell Midcap If If Growth Period Held Redeemed Index -------------------------------------------------------------------------------- 10 Years 9.20% 9.20% 9.66% 5 Years 17.05 17.05 20.53 1 Year 20.71 16.71 20.72 -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated April 1, 2014) -------------------------------------------------------------------------------- Gross -------------------------------------------------------------------------------- 2.58% -------------------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $10,000 Investment Pioneer Select Mid Russell Midcap Cap Growth Fund Growth Index 5/31/2004 $ 10,000 $ 10,000 5/31/2005 $ 10,620 $ 11,057 5/31/2006 $ 12,945 $ 12,784 5/31/2007 $ 14,608 $ 15,512 5/31/2008 $ 15,658 $ 15,390 5/31/2009 $ 10,979 $ 9,892 5/31/2010 $ 13,260 $ 12,873 5/31/2011 $ 17,522 $ 17,547 5/31/2012 $ 16,396 $ 16,439 5/31/2013 $ 19,983 $ 20,839 5/31/2014 $ 24,121 $ 25,157 Call 1-800-225-6292 or visit us.pioneerinvestments.com for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. "If Held" results represent the percent change in net asset value per share. Returns would have been lower had sales charges been reflected. "If Redeemed" returns reflect the deduction of applicable contingent deferred sales charge (CDSC). The maximum CDSC for Class B shares is 4% and declines over five years. For more complete information, please see the prospectus. All results are historical and assume the reinvestment of dividends and capital gains. Other share classes are available for which performance and expenses will differ. Performance results reflect any applicable expense waivers in effect during the periods shown. Without such waivers Fund performance would be lower. Waivers may not be in effect for all funds. Certain fee waivers are contractual through a specified period. Otherwise, fee waivers can be rescinded at any time. See the prospectus and financial statements for more information. The performance table and graph do not reflect the deduction of taxes that a shareowner would pay on Fund distributions or the redemption of Fund shares. The Fund acquired the assets and liabilities of Pioneer Select Mid Cap Growth Fund ("the predecessor fund") on June 7, 2013 ("the reorganization"). As a result of the reorganization, the predecessor fund's performance and financial history became the performance and financial history of the Fund. The prede- cessor fund did not offer Class B shares. Accordingly, the performance of Class B shares of the Fund is the performance of Class A shares of the predecessor fund for periods prior to the reorganization, restated to reflect the higher distribution and service fees of Class B shares, but not other differences in expenses. The predecessor fund was established in connection with the reorganization of Regions Morgan Keegan Select Mid Cap Growth Fund into the predecessor fund on May 15, 2009. The performance shown for Class B shares of the Fund for periods prior to May 15, 2009, is based on the performance of Regions Morgan Keegan Select Mid Cap Growth Fund's Class A shares, which has been restated to reflect differences in any applicable sales charges and the higher distribution and service fees of Class B shares of the Fund (but not differences in expenses). This adjustment has the effect of reducing the previously reported performance of Regions Morgan Keegan Select Mid Cap Growth Fund. A different investment adviser served as the adviser of Regions Morgan Keegan Select Mid Cap Growth Fund. 12 Pioneer Select Mid Cap Growth Fund | Semiannual Report | 5/31/14 Performance Update | 5/31/14 Class C Shares Investment Returns -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $10,000 investment made in Class C shares of Pioneer Select Mid Cap Growth Fund during the periods shown, compared to that of the Russell Midcap Growth Index. Average Annual Total Returns (As of May 31, 2014) -------------------------------------------------------------------------------- Russell Midcap If If Growth Period Held Redeemed Index -------------------------------------------------------------------------------- 10 Years 9.31% 9.31% 9.66% 5 Years 17.01 17.01 20.53 1 Year 21.39 21.39 20.72 -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated April 1, 2014) -------------------------------------------------------------------------------- Gross -------------------------------------------------------------------------------- 1.97% -------------------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $10,000 Investment Pioneer Select Mid Russell Midcap Cap Growth Fund Growth Index 5/31/2004 $ 10,000 $ 10,000 5/31/2005 $ 10,639 $ 11,057 5/31/2006 $ 13,027 $ 12,784 5/31/2007 $ 14,775 $ 15,512 5/31/2008 $ 15,828 $ 15,390 5/31/2009 $ 11,101 $ 9,892 5/31/2010 $ 13,397 $ 12,873 5/31/2011 $ 17,668 $ 17,547 5/31/2012 $ 16,490 $ 16,439 5/31/2013 $ 20,062 $ 20,839 5/31/2014 $ 24,353 $ 25,157 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 performance table and graph do not reflect the deduction of fees and taxes that a shareowner would pay on Fund distributions or the redemption of Fund shares. The Fund acquired the assets and liabilities of Pioneer Select Mid Cap Growth Fund ("the predecessor fund") on June 7, 2013 ("the reorganization"). As a result of the reorganization, the predecessor fund's performance and financial history became the performance and financial history of the Fund. The performance of Class C shares of the Fund is the performance of Class C shares of the predecessor fund for periods prior to the reorganization, and has not been restated to reflect any differences in expenses. The predecessor fund was established in connection with the reorganization of Regions Morgan Keegan Select Mid Cap Growth Fund into the predecessor fund on May 15, 2009. The performance of Class C shares of the predecessor fund for periods prior to May 15, 2009, includes the performance of Regions Morgan Keegan Select Mid Cap Growth Fund's Class C shares, which has been restated to reflect differences in any applicable sales charges (but not differences in expenses). This adjustment has the effect of reducing the previously reported performance of Regions Morgan Keegan Select Mid Cap Growth Fund. A different investment adviser served as the adviser of Regions Morgan Keegan Select Mid Cap Growth Fund. Pioneer Select Mid Cap Growth Fund | Semiannual Report | 5/31/14 13 Performance Update | 5/31/14 Class R Shares Investment Returns -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $10,000 investment made in Class R shares of Pioneer Select Mid Cap Growth Fund during the periods shown, compared to that of the Russell Midcap Growth Index. Average Annual Total Returns (As of May 31, 2014) -------------------------------------------------------------------------------- Russell Midcap If If Growth Period Held Redeemed Index -------------------------------------------------------------------------------- 10 Years 9.56% 9.56% 9.66% 5 Years 17.52 17.52 20.53 1 Year 21.96 21.96 20.72 -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated April 1, 2014) -------------------------------------------------------------------------------- Gross -------------------------------------------------------------------------------- 1.52% -------------------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $10,000 Investment Pioneer Select Mid Russell Midcap Cap Growth Fund Growth Index 5/31/2004 $ 10,000 $ 10,000 5/31/2005 $ 10,646 $ 11,057 5/31/2006 $ 13,009 $ 12,784 5/31/2007 $ 14,717 $ 15,512 5/31/2008 $ 15,814 $ 15,390 5/31/2009 $ 11,116 $ 9,892 5/31/2010 $ 13,460 $ 12,873 5/31/2011 $ 17,830 $ 17,547 5/31/2012 $ 16,726 $ 16,439 5/31/2013 $ 20,435 $ 20,839 5/31/2014 $ 24,923 $ 25,157 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 R shares are not subject to sales charges and are available for limited groups of eligible 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. The Fund acquired the assets and liabilities of Pioneer Select Mid Cap Growth Fund ("the predecessor fund") on June 7, 2013 ("the reorganization"). As a result of the reorganization, the predecessor fund's performance and financial history became the performance and financial history of the Fund. The predecessor fund did not offer Class R shares. Accordingly, the performance of Class R shares of the Fund is the performance of Class A shares of the predecessor fund for periods prior to the reorganization, restated to reflect the higher distribution and service fees of Class R shares, but not other differences in expenses. The predecessor fund was established in connection with the reorganization of Regions Morgan Keegan Select Mid Cap Growth Fund into the predecessor fund on May 15, 2009. The performance shown for Class R shares of the Fund for periods prior to May 15, 2009, is based on the performance of Regions Morgan Keegan Select Mid Cap Growth Fund's Class A shares, which has been restated to reflect differences in any applicable sales charges and the higher distribution and service fees of Class R shares of the Fund (but not differences in expenses). This adjustment has the effect of reducing the previously reported performance of Regions Morgan Keegan Select Mid Cap Growth Fund. A different investment adviser served as the adviser of Regions Morgan Keegan Select Mid Cap Growth Fund. 14 Pioneer Select Mid Cap Growth Fund | Semiannual Report | 5/31/14 Performance Update | 5/31/14 Class Y Shares Investment Returns -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $5 million investment made in Class Y shares of Pioneer Select Mid Cap Growth Fund during the periods shown, compared to that of the Russell Midcap Growth Index. Average Annual Total Returns (As of May 31, 2014) -------------------------------------------------------------------------------- Russell Midcap If If Growth Period Held Redeemed Index -------------------------------------------------------------------------------- Life-of-Class (6/23/2004) 10.40% 10.40% 9.66% 5 Years 18.58 18.58 20.53 1 Year 22.78 22.78 20.72 -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated April 1, 2014) -------------------------------------------------------------------------------- Gross -------------------------------------------------------------------------------- 0.76% -------------------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $5 Million Investment Pioneer Select Mid Russell Midcap Cap Growth Fund Growth Index 6/30/2004 $ 5,000,000 $ 5,000,000 5/31/2005 $ 5,286,799 $ 5,442,008 5/31/2006 $ 6,503,266 $ 6,291,742 5/31/2007 $ 7,399,247 $ 7,634,613 5/31/2008 $ 8,017,136 $ 7,574,263 5/31/2009 $ 5,674,163 $ 4,868,386 5/31/2010 $ 6,940,759 $ 6,335,550 5/31/2011 $ 9,283,729 $ 8,636,132 5/31/2012 $ 8,787,298 $ 8,090,889 5/31/2013 $ 10,835,715 $ 10,256,130 5/31/2014 $ 13,304,519 $ 12,381,663 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 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. The Fund acquired the assets and liabilities of Pioneer Select Mid Cap Growth Fund ("the predecessor fund") on June 7, 2013 ("the reorganization"). As a result of the reorganization, the predecessor fund's performance and financial history became the performance and financial history of the Fund. The performance of Class Y shares of the Fund is the performance of Class Y shares of the predecessor fund for periods prior to the reorganization, and has not been restated to reflect any differences in expenses. The predecessor fund was established in connection with the reorganization of Regions Morgan Keegan Select Mid Cap Growth Fund into the predecessor fund on May 15, 2009. The performance of Class Y shares of the predecessor fund for periods prior to May 15, 2009, includes the performance of Regions Morgan Keegan Select Mid Cap Growth Fund's Class I shares, which has been restated to reflect differences in any applicable sales charges (but not differences in expenses). This adjustment has the effect of reducing the previously reported performance of Regions Morgan Keegan Select Mid Cap Growth Fund. A different investment adviser served as the adviser of Regions Morgan Keegan Select Mid Cap Growth Fund. Pioneer Select Mid Cap Growth Fund | Semiannual Report | 5/31/14 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 Select Mid Cap Growth Fund Based on actual returns from December 1, 2013 through May 31, 2014. -------------------------------------------------------------------------------- Share Class A B C R Y -------------------------------------------------------------------------------- Beginning Account $1,000.00 $1,000.00 $1,000.00 $1,000.00 $1,000.00 Value on 12/1/13 -------------------------------------------------------------------------------- Ending Account $1,066.33 $1,058.70 $1,062.10 $1,064.50 $1,068.10 Value (after expenses) on 5/31/14 -------------------------------------------------------------------------------- Expenses Paid $ 5.56 $ 12.93 $ 9.77 $ 7.51 $ 3.87 During Period* -------------------------------------------------------------------------------- * Expenses are equal to the Fund's annualized expense ratio of 1.08%, 2.52%, 1.90% 1.46% and 0.75% for Class A, Class B, Class C, Class R and Class Y, respectively, multiplied by the average account value over the period, multiplied by 182/365 (to reflect the partial one-half year period). 16 Pioneer Select Mid Cap Growth Fund | Semiannual Report | 5/31/14 Hypothetical Example for Comparison Purposes The table below provides information about hypothetical account values and hypothetical expenses based on the Fund's actual expense ratio and an assumed rate of return of 5% per year before expenses, which is not the Fund's actual return. The hypothetical account values and expenses may not be used to estimate the actual ending account balance or expenses you paid for the period. You may use this information to compare the ongoing costs of investing in the Fund and other funds. To do so, compare this 5% hypothetical example with the 5% hypothetical examples that appear in the shareholder reports of the other funds. Please note that the expenses shown in the tables are meant to highlight your ongoing costs only and do not reflect any transaction costs, such as sales charges (loads) that are charged at the time of the transaction. Therefore, the table below is useful in comparing ongoing costs only and will not help you determine the relative total costs of owning different funds. In addition, if these transaction costs were included, your costs would have been higher. Expenses Paid on a $1,000 Investment in Pioneer Select Mid Cap Growth Fund Based on a hypothetical 5% return per year before expenses, reflecting the period from December 1, 2013 through May 31, 2014. -------------------------------------------------------------------------------- Share Class A B C R Y -------------------------------------------------------------------------------- Beginning Account $1,000.00 $1,000.00 $1,000.00 $1,000.00 $1,000.00 Value on 12/1/13 -------------------------------------------------------------------------------- Ending Account $1,019.55 $1,012.37 $1,015.46 $1,017.65 $1,021.19 Value (after expenses) on 5/31/14 -------------------------------------------------------------------------------- Expenses Paid $ 5.44 $ 12.64 $ 9.55 $ 7.34 $ 3.78 During Period* -------------------------------------------------------------------------------- * Expenses are equal to the Fund's annualized expense ratio of 1.08%, 2.52%, 1.90% 1.46% and 0.75% for Class A, Class B, Class C, Class R and Class Y, respectively, multiplied by the average account value over the period, multiplied by 182/365 (to reflect the partial one-half year period). Pioneer Select Mid Cap Growth Fund | Semiannual Report | 5/31/14 17 Schedule of Investments | 5/31/14 (unaudited) ------------------------------------------------------------------------------------------- Shares Value ------------------------------------------------------------------------------------------- COMMON STOCKS -- 99.0% ENERGY -- 8.1% Oil & Gas Equipment & Services -- 0.7% 180,695 Basic Energy Services, Inc.* $ 4,914,904 134,949 RPC, Inc. 2,981,023 -------------- $ 7,895,927 ------------------------------------------------------------------------------------------- Oil & Gas Exploration & Production -- 6.4% 556,372 Cabot Oil & Gas Corp. $ 20,162,921 69,337 Cimarex Energy Co. 8,953,487 45,875 Comstock Resources, Inc.* 1,247,341 19,521 Concho Resources, Inc.* 2,572,868 586,055 Goodrich Petroleum Corp.* 16,995,595 181,676 Gulfport Energy Corp.* 11,178,524 22,277 Parsley Energy, Inc. 529,524 457,635 Penn Virginia Corp.* 6,946,899 180,237 Rice Energy, Inc. 5,718,920 -------------- $ 74,306,079 ------------------------------------------------------------------------------------------- Oil & Gas Refining & Marketing -- 0.5% 66,392 Marathon Petroleum Corp.* $ 5,934,781 ------------------------------------------------------------------------------------------- Oil & Gas Storage & Transportation -- 0.5% 82,115 SemGroup Corp. $ 5,578,893 -------------- Total Energy $ 93,715,680 ------------------------------------------------------------------------------------------- MATERIALS -- 6.2% Commodity Chemicals -- 1.0% 41,568 Methanex Corp. $ 2,373,533 106,936 Westlake Chemical Corp. 8,645,776 -------------- $ 11,019,309 ------------------------------------------------------------------------------------------- Specialty Chemicals -- 1.4% 266,677 Flotek Industries, Inc.* $ 7,568,293 98,407 WR Grace & Co.* 9,061,317 -------------- $ 16,629,610 ------------------------------------------------------------------------------------------- Construction Materials -- 1.4% 100,382 Eagle Materials, Inc. $ 8,730,223 61,840 Martin Marietta Materials, Inc. 7,593,952 -------------- $ 16,324,175 ------------------------------------------------------------------------------------------- Metal & Glass Containers -- 0.2% 44,399 Crown Holdings, Inc.* $ 2,168,891 ------------------------------------------------------------------------------------------- Paper Packaging -- 0.5% 58,693 Rock-Tenn Co. $ 5,929,754 ------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 18 Pioneer Select Mid Cap Growth Fund | Semiannual Report | 5/31/14 ------------------------------------------------------------------------------------------- Shares Value ------------------------------------------------------------------------------------------- Diversified Metals & Mining -- 0.2% 391,336 Lundin Mining Corp.* $ 2,053,301 ------------------------------------------------------------------------------------------- Steel -- 1.0% 172,178 APERAM* $ 5,618,125 17,502,115 Outokumpu OYJ 6,164,332 -------------- $ 11,782,457 ------------------------------------------------------------------------------------------- Paper Products -- 0.5% 191,307 KapStone Paper and Packaging Corp. $ 5,557,468 -------------- Total Materials $ 71,464,965 ------------------------------------------------------------------------------------------- CAPITAL GOODS -- 5.6% Aerospace & Defense -- 1.2% 100,455 B/E Aerospace, Inc.* $ 9,719,021 44,859 Huntington Ingalls Industries, Inc. 4,478,274 -------------- $ 14,197,295 ------------------------------------------------------------------------------------------- Construction & Engineering -- 0.7% 43,084 Chicago Bridge & Iron Co. NV $ 3,507,038 150,345 Quanta Services, Inc.* 5,104,213 -------------- $ 8,611,251 ------------------------------------------------------------------------------------------- Electrical Components & Equipment -- 1.2% 138,116 Brady Corp. $ 3,747,087 36,179 Rockwell Automation, Inc. 4,380,553 36,316 Roper Industries, Inc. 5,145,251 -------------- $ 13,272,891 ------------------------------------------------------------------------------------------- Construction & Farm Machinery & Heavy Trucks -- 0.9% 84,538 Terex Corp.* $ 3,251,331 242,646 The Manitowoc Co., Inc. 6,563,574 -------------- $ 9,814,905 ------------------------------------------------------------------------------------------- Industrial Machinery -- 1.6% 97,484 Chart Industries, Inc.* $ 7,008,125 110,815 Ingersoll-Rand Plc 6,628,953 113,251 ITT Corp. 4,946,804 -------------- $ 18,583,882 -------------- Total Capital Goods $ 64,480,224 ------------------------------------------------------------------------------------------- COMMERCIAL SERVICES & SUPPLIES -- 3.1% Diversified Support Services -- 1.4% 127,314 Mobile Mini, Inc.* $ 5,544,525 106,577 United Rentals, Inc.* 10,769,606 -------------- $ 16,314,131 ------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Select Mid Cap Growth Fund | Semiannual Report | 5/31/14 19 Schedule of Investments | 5/31/14 (unaudited) (continued) ------------------------------------------------------------------------------------------- Shares Value ------------------------------------------------------------------------------------------- Human Resource & Employment Services -- 1.7% 126,985 Towers Watson & Co. $ 14,287,082 133,616 WageWorks, Inc.* 5,408,776 -------------- $ 19,695,858 -------------- Total Commercial Services & Supplies $ 36,009,989 ------------------------------------------------------------------------------------------- TRANSPORTATION -- 7.1% Airlines -- 4.6% 538,631 Air Canada $ 4,395,670 23,200 Air Canada* 189,331 36,424 Alaska Air Group, Inc. 3,586,307 544,618 American Airlines Group, Inc. 21,871,861 402,729 Delta Air Lines, Inc. 16,072,914 164,415 United Continental Holdings, Inc.* 7,295,094 -------------- $ 53,411,177 ------------------------------------------------------------------------------------------- Marine -- 1.7% 754,437 Diana Shipping, Inc.* $ 8,223,363 52,106 Kirby Corp.* 5,760,318 337,269 Safe Bulkers, Inc. 2,731,879 279,861 Star Bulk Carriers Corp. 2,986,117 -------------- $ 19,701,677 ------------------------------------------------------------------------------------------- Railroads -- 0.4% 46,411 Kansas City Southern $ 4,990,111 ------------------------------------------------------------------------------------------- Trucking -- 0.4% 65,481 Old Dominion Freight Line, Inc.* $ 4,188,165 -------------- Total Transportation $ 82,291,130 ------------------------------------------------------------------------------------------- AUTOMOBILES & COMPONENTS -- 3.1% Auto Parts & Equipment -- 2.1% 60,549 Delphi Automotive Plc $ 4,181,514 226,728 Lear Corp. 19,963,400 -------------- $ 24,144,914 ------------------------------------------------------------------------------------------- Automobile Manufacturers -- 0.2% 12,012 Tesla Motors, Inc.* $ 2,495,733 ------------------------------------------------------------------------------------------- Motorcycle Manufacturers -- 0.8% 130,206 Harley-Davidson, Inc. $ 9,275,875 -------------- Total Automobiles & Components $ 35,916,522 ------------------------------------------------------------------------------------------- CONSUMER DURABLES & APPAREL -- 5.3% Home Furnishings -- 0.6% 50,078 Mohawk Industries, Inc.* $ 6,793,581 ------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 20 Pioneer Select Mid Cap Growth Fund | Semiannual Report | 5/31/14 ------------------------------------------------------------------------------------------- Shares Value ------------------------------------------------------------------------------------------- Homebuilding -- 0.7% 109,228 Lennar Corp. $ 4,467,425 103,822 Toll Brothers, Inc.* 3,760,433 -------------- $ 8,227,858 ------------------------------------------------------------------------------------------- Household Appliances -- 0.6% 47,748 Whirlpool Corp. $ 6,854,225 ------------------------------------------------------------------------------------------- Apparel, Accessories & Luxury Goods -- 3.1% 51,232 Carter's, Inc. $ 3,695,364 105,935 G-III Apparel Group, Ltd.* 7,767,154 152,541 Hanesbrands, Inc. 12,940,053 62,336 Michael Kors Holdings, Ltd.* 5,883,272 48,432 PVH Corp. 6,375,104 -------------- $ 36,660,947 ------------------------------------------------------------------------------------------- Textiles -- 0.3% 89,541 Kate Spade & Co. $ 3,260,188 -------------- Total Consumer Durables & Apparel $ 61,796,799 ------------------------------------------------------------------------------------------- CONSUMER SERVICES -- 3.9% Casinos & Gaming -- 1.5% 148,513 Las Vegas Sands Corp. $ 11,364,215 182,063 Melco Crown Entertainment, Ltd. (A.D.R.)* 6,275,712 -------------- $ 17,639,927 ------------------------------------------------------------------------------------------- Hotels, Resorts & Cruise Lines -- 0.8% 287,439 Norwegian Cruise Line Holdings, Ltd.* $ 9,701,066 ------------------------------------------------------------------------------------------- Restaurants -- 0.8% 9,664 Chipotle Mexican Grill, Inc.* $ 5,287,078 91,184 Dunkin' Brands Group, Inc.* 4,081,396 -------------- $ 9,368,474 ------------------------------------------------------------------------------------------- Specialized Consumer Services -- 0.8% 288,954 H&R Block, Inc. $ 8,605,050 -------------- Total Consumer Services $ 45,314,517 ------------------------------------------------------------------------------------------- MEDIA -- 1.4% Broadcasting -- 0.6% 86,292 Discovery Communications, Inc.* $ 6,641,032 ------------------------------------------------------------------------------------------- Cable & Satellite -- 0.8% 98,757 Liberty Global Plc* $ 4,446,040 123,671 Liberty Global Plc* 5,293,119 -------------- $ 9,739,159 -------------- Total Media $ 16,380,191 ------------------------------------------------------------------------------------------- RETAILING -- 8.9% Distributors -- 0.6% 267,993 LKQ Corp.* $ 7,434,126 ------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Select Mid Cap Growth Fund | Semiannual Report | 5/31/14 21 Schedule of Investments | 5/31/14 (unaudited) (continued) ------------------------------------------------------------------------------------------- Shares Value ------------------------------------------------------------------------------------------- Internet Retail -- 2.4% 235,397 HomeAway, Inc.* $ 7,250,228 21,487 Netflix, Inc.* 8,977,913 9,006 The Priceline Group, Inc.* 11,515,342 -------------- $ 27,743,483 ------------------------------------------------------------------------------------------- General Merchandise Stores -- 1.3% 45,931 Dollar General Corp.* $ 2,470,169 239,893 Dollar Tree, Inc.* 12,721,526 -------------- $ 15,191,695 ------------------------------------------------------------------------------------------- Apparel Retail -- 1.5% 145,828 Ross Stores, Inc. $ 9,981,927 128,346 The TJX Companies, Inc. 6,988,440 -------------- $ 16,970,367 ------------------------------------------------------------------------------------------- Home Improvement Retail -- 0.6% 156,322 Lowe's Companies, Inc. $ 7,359,640 ------------------------------------------------------------------------------------------- Specialty Stores -- 0.8% 140,752 Tractor Supply Co.* $ 9,151,695 ------------------------------------------------------------------------------------------- Automotive Retail -- 1.7% 97,821 Advance Auto Parts, Inc. $ 12,146,434 7,540 AutoZone, Inc.* 4,015,050 75,878 CarMax, Inc.* 3,362,154 -------------- $ 19,523,638 -------------- Total Retailing $ 103,374,644 ------------------------------------------------------------------------------------------- FOOD & STAPLES RETAILING -- 1.1% Food Retail -- 1.1% 76,927 Natural Grocers by Vitamin Cottage, Inc.* $ 1,599,312 225,727 The Kroger Co. 10,776,207 -------------- $ 12,375,519 -------------- Total Food & Staples Retailing $ 12,375,519 ------------------------------------------------------------------------------------------- FOOD, BEVERAGE & TOBACCO -- 4.5% Distillers & Vintners -- 0.8% 115,434 Constellation Brands, Inc.* $ 9,711,462 ------------------------------------------------------------------------------------------- Soft Drinks -- 0.9% 145,297 Monster Beverage Corp.* $ 10,080,706 ------------------------------------------------------------------------------------------- Packaged Foods & Meats -- 1.7% 173,703 Keurig Green Mountain, Inc. $ 19,590,224 ------------------------------------------------------------------------------------------- Tobacco -- 1.1% 197,131 Lorillard, Inc. $ 12,255,634 -------------- Total Food, Beverage & Tobacco $ 51,638,026 ------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 22 Pioneer Select Mid Cap Growth Fund | Semiannual Report | 5/31/14 ------------------------------------------------------------------------------------------- Shares Value ------------------------------------------------------------------------------------------- HOUSEHOLD & PERSONAL PRODUCTS -- 1.2% Personal Products -- 1.2% 181,639 Coty, Inc. $ 3,029,739 38,278 Nu Skin Enterprises, Inc. 2,826,448 97,617 The Estee Lauder Companies, Inc. 7,479,415 -------------- $ 13,335,602 -------------- Total Household & Personal Products $ 13,335,602 ------------------------------------------------------------------------------------------- HEALTH CARE EQUIPMENT & SERVICES -- 5.9% Health Care Equipment -- 1.2% 174,914 Edwards Lifesciences Corp.* $ 14,203,017 ------------------------------------------------------------------------------------------- Health Care Supplies -- 1.3% 151,098 Align Technology, Inc.* $ 8,251,462 540,316 Endologix, Inc.* 7,056,527 -------------- $ 15,307,989 ------------------------------------------------------------------------------------------- Health Care Services -- 2.2% 355,322 Catamaran Corp.* $ 15,548,891 155,897 Omnicare, Inc. 9,907,254 -------------- $ 25,456,145 ------------------------------------------------------------------------------------------- Health Care Facilities -- 0.5% 172,794 Brookdale Senior Living, Inc.* $ 5,747,128 ------------------------------------------------------------------------------------------- Managed Health Care -- 0.7% 102,213 WellCare Health Plans, Inc.* $ 7,916,397 -------------- Total Health Care Equipment & Services $ 68,630,676 ------------------------------------------------------------------------------------------- PHARMACEUTICALS, BIOTECHNOLOGY & LIFE SCIENCES -- 9.0% Biotechnology -- 3.1% 162,678 Alkermes Plc* $ 7,452,279 116,246 Cubist Pharmaceuticals, Inc.* 7,741,984 460,666 Neurocrine Biosciences, Inc.* 6,398,651 228,096 NPS Pharmaceuticals, Inc.* 7,100,628 99,548 Vertex Pharmaceuticals, Inc.* 7,193,338 -------------- $ 35,886,880 ------------------------------------------------------------------------------------------- Pharmaceuticals -- 4.8% 81,273 Actavis plc* $ 17,192,490 229,529 Akorn, Inc.* 6,419,926 90,360 Jazz Pharmaceuticals Plc* 12,818,470 119,768 Salix Pharmaceuticals, Ltd.* 13,663,133 36,146 Shire Plc (A.D.R.) 6,267,355 -------------- $ 56,361,374 ------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Select Mid Cap Growth Fund | Semiannual Report | 5/31/14 23 Schedule of Investments | 5/31/14 (unaudited) (continued) ------------------------------------------------------------------------------------------- Shares Value ------------------------------------------------------------------------------------------- Life Sciences Tools & Services -- 1.1% 317,217 Bruker Corp.* $ 6,645,696 111,110 Charles River Laboratories International, Inc.* 5,953,274 -------------- $ 12,598,970 -------------- Total Pharmaceuticals, Biotechnology & Life Sciences $ 104,847,224 ------------------------------------------------------------------------------------------- BANKS -- 1.5% Regional Banks -- 1.5% 276,332 BankUnited, Inc.* $ 8,991,843 67,734 Signature Bank* 7,844,952 -------------- $ 16,836,795 -------------- Total Banks $ 16,836,795 ------------------------------------------------------------------------------------------- DIVERSIFIED FINANCIALS -- 4.2% Specialized Finance -- 1.4% 416,377 The NASDAQ OMX Group, Inc. $ 15,780,688 ------------------------------------------------------------------------------------------- Consumer Finance -- 0.9% 180,118 Discover Financial Services, Inc. $ 10,650,377 ------------------------------------------------------------------------------------------- Asset Management & Custody Banks -- 1.4% 51,553 Affiliated Managers Group, Inc.* $ 9,722,896 219,468 The Blackstone Group LP 6,821,065 -------------- $ 16,543,961 ------------------------------------------------------------------------------------------- Investment Banking & Brokerage -- 0.5% 182,623 Morgan Stanley Co. $ 5,635,746 -------------- Total Diversified Financials $ 48,610,772 ------------------------------------------------------------------------------------------- INSURANCE -- 0.6% Insurance Brokers -- 0.6% 81,317 Aon Plc* $ 7,313,651 -------------- Total Insurance $ 7,313,651 ------------------------------------------------------------------------------------------- REAL ESTATE -- 1.0% Specialized REIT -- 1.0% 366,600 Weyerhaeuser Co. $ 11,518,572 -------------- Total Real Estate $ 11,518,572 ------------------------------------------------------------------------------------------- SOFTWARE & SERVICES -- 9.3% Internet Software & Services -- 3.8% 238,673 Akamai Technologies, Inc.* $ 12,969,491 52,263 CoStar Group, Inc.* 8,286,299 122,850 eBay, Inc.* 6,232,180 9,831 Google, Inc. 5,514,994 9,791 Google, Inc.* 5,597,025 30,583 LinkedIn Corp.* 4,896,032 -------------- $ 43,496,021 ------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 24 Pioneer Select Mid Cap Growth Fund | Semiannual Report | 5/31/14 ------------------------------------------------------------------------------------------- Shares Value ------------------------------------------------------------------------------------------- IT Consulting & Other Services -- 0.4% 70,651 Gartner, Inc.* $ 5,022,580 ------------------------------------------------------------------------------------------- Data Processing & Outsourced Services -- 2.2% 17,063 Alliance Data Systems Corp.* $ 4,368,981 80,678 MasterCard, Inc. 6,167,833 223,008 Vantiv, Inc.* 6,911,018 82,184 WEX, Inc.* 7,913,497 -------------- $ 25,361,329 ------------------------------------------------------------------------------------------- Application Software -- 2.3% 73,773 ANSYS, Inc.* $ 5,418,627 57,916 Autodesk, Inc.* 3,033,061 472,399 Cadence Design Systems, Inc.* 7,884,339 135,539 Qlik Technologies, Inc.* 2,942,552 70,901 salesforce.com inc* 3,731,520 97,878 SS&C Technologies Holdings, Inc.* 4,174,497 -------------- $ 27,184,596 ------------------------------------------------------------------------------------------- Systems Software -- 0.6% 75,917 VMware, Inc.* $ 7,325,990 -------------- Total Software & Services $ 108,390,516 ------------------------------------------------------------------------------------------- TECHNOLOGY HARDWARE & EQUIPMENT -- 2.5% Communications Equipment -- 1.3% 137,535 F5 Networks, Inc.* $ 14,929,424 ------------------------------------------------------------------------------------------- Computer Hardware -- 0.3% 113,340 NCR Corp.* $ 3,701,684 ------------------------------------------------------------------------------------------- Computer Storage & Peripherals -- 0.9% 50,069 SanDisk Corp. $ 4,838,167 68,475 Western Digital Corp. 6,015,529 -------------- $ 10,853,696 -------------- Total Technology Hardware & Equipment $ 29,484,804 ------------------------------------------------------------------------------------------- SEMICONDUCTORS & SEMICONDUCTOR EQUIPMENT -- 4.0% Semiconductors -- 4.0% 989,594 Atmel Corp.* $ 8,292,798 157,924 Avago Technologies, Ltd. 11,160,489 244,289 Skyworks Solutions, Inc.* 10,580,157 137,153 Synaptics, Inc.* 9,337,376 146,673 Xilinx, Inc. 6,887,764 -------------- $ 46,258,584 -------------- Total Semiconductors & Semiconductor Equipment $ 46,258,584 ------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Select Mid Cap Growth Fund | Semiannual Report | 5/31/14 25 Schedule of Investments | 5/31/14 (unaudited) (continued) ----------------------------------------------------------------------------------------------- Shares Value ----------------------------------------------------------------------------------------------- TELECOMMUNICATION SERVICES -- 1.1% Wireless Telecommunication Services -- 1.1% 123,761 SBA Communications Corp.* $ 12,561,742 --------------- Total Telecommunication Services $ 12,561,742 ----------------------------------------------------------------------------------------------- UTILITIES -- 0.4% Electric Utilities -- 0.2% 31,025 NextEra Energy, Inc.* $ 3,020,594 ----------------------------------------------------------------------------------------------- Gas Utilities -- 0.2% 25,097 National Fuel Gas Co. $ 1,882,275 --------------- Total Utilities $ 4,902,869 ----------------------------------------------------------------------------------------------- TOTAL COMMON STOCKS (Cost $874,343,607) $ 1,147,450,013 ----------------------------------------------------------------------------------------------- ----------------------------------------------------------------------------------------------- Principal Amount ($) ----------------------------------------------------------------------------------------------- CORPORATE BONDS -- 0.2% ENERGY -- 0.2% Integrated Oil & Gas -- 0.2% 2,365,000 American Energy -- Utica LLC, 3.5%, 3/1/21 (144A) (PIK) $ 2,435,950 --------------- Total Energy $ 2,435,950 ----------------------------------------------------------------------------------------------- TOTAL CORPORATE BONDS (Cost $2,365,000) $ 2,435,950 ----------------------------------------------------------------------------------------------- TOTAL INVESTMENT IN SECURITIES -- 99.2% (Cost $876,708,607) (a) $ 1,149,885,963 ----------------------------------------------------------------------------------------------- OTHER ASSETS & LIABILITIES -- 0.8% $ 9,363,542 ----------------------------------------------------------------------------------------------- TOTAL NET ASSETS -- 100.0% $ 1,159,249,505 =============================================================================================== WRITTEN CALL OPTIONS -- (0.0%) ENERGY -- (0.0%) Oil & Gas Exploration & Production -- (0.0%) (295) Goodrich Petroleum Corp. $ (59,738) --------------- Total Energy $ (59,738) ----------------------------------------------------------------------------------------------- TOTAL WRITTEN CALL OPTIONS (premiums received $(59,589)) $ (59,738) ----------------------------------------------------------------------------------------------- * Non-income producing security. NR Not rated by either S&P or Moody's. REIT Real Estate Investment Trust. (144A) Security is exempt from registration under Rule 144A of the Securities Act of 1933. Such securities may be resold normally to qualified institutional buyers in a transaction exempt from registration. At May 31, 2014, the value of these securities amounted to $2,435,950 or 0.2% of total net assets. (A.D.R.) American Depositary Receipts. The accompanying notes are an integral part of these financial statements. 26 Pioneer Select Mid Cap Growth Fund | Semiannual Report | 5/31/14 (a) At May 31, 2014, the net unrealized appreciation on investments based on cost for federal income tax purposes of $878,261,635 was as follows: Aggregate gross unrealized appreciation for all investments in which there is an excess of value over tax cost $ 279,800,572 Aggregate gross unrealized depreciation for all investments in which there is an excess of tax cost over value (8,176,244) ------------- Net unrealized appreciation $ 271,624,328 ============= Purchases and sales of securities (excluding temporary cash investments) for the six months ended May 31, 2014 aggregated $554,208,295 and $641,128,230, respectively. Various inputs are used in determining the value of the Fund's investments. These inputs are summarized in the three broad levels listed below. Level 1 - quoted prices in active markets for identical securities. Level 2 - other significant observable inputs (including quoted prices for similar securities, interest rates, prepayment speeds, credit risk, etc.) See Notes to Financial Statements -- Note 1A. Level 3 - significant unobservable inputs (including the Fund's own assumptions in determining fair value of investments) See Notes to Financial Statements -- Note 1A. Generally, equity securities are categorized as Level 1, fixed income securities and senior loans as Level 2 and securities valued using fair value methods (other than prices supplied by independent pricing services or broker-dealers) as Level 3. The following is a summary of the inputs used as of May 31, 2014, in valuing the Fund's investments: ---------------------------------------------------------------------------------------- Level 1 Level 2 Level 3 Total ---------------------------------------------------------------------------------------- Common Stocks $1,147,450,013 $ -- $ -- $1,147,450,013 Corporate Bonds -- 2,435,950 -- 2,435,950 ---------------------------------------------------------------------------------------- Total $1,147,450,013 $ 2,435,950 $ -- $1,149,885,963 ======================================================================================== Other Financial Instruments Net unrealized depreciation on written options $ (149) $ -- $ -- $ (149) ---------------------------------------------------------------------------------------- Total Other Financial Instruments $ (149) $ -- $ -- $ (149) ======================================================================================== During the six months ended May 31, 2014, there were no transfers between Levels 1, 2 and 3. The accompanying notes are an integral part of these financial statements. Pioneer Select Mid Cap Growth Fund | Semiannual Report | 5/31/14 27 Statement of Assets and Liabilities | 5/31/14 (unaudited) ASSETS: Investment in securities (cost $876,708,607) $1,149,885,963 Cash 721,031 Foreign currencies, at value (cost $7,378) 7,393 Receivables -- Investment securities sold 11,506,859 Fund shares sold 2,233,011 Dividends 642,334 Interests 39,842 Prepaid expenses 63,706 ------------------------------------------------------------------------------------ Total assets $1,165,100,139 ==================================================================================== LIABILITIES: Payables -- Investment securities purchased $ 4,259,842 Fund shares repurchased 1,155,693 Dividends 874 Trustee fees 7,648 Written options (premiums received $59,589) 59,738 Due to affiliates 273,113 Accrued expenses 93,726 ------------------------------------------------------------------------------------ Total liabilities $ 5,850,634 ==================================================================================== NET ASSETS: Paid-in capital $ 784,357,214 Distributions in excess of net investment loss (2,757,383) Accumulated net realized gain on investments 104,473,627 Net unrealized appreciation on investments 273,177,356 Net unrealized depreciation on written options (149) Net unrealized depreciation on assets and liabilities denominated in foreign currencies (1,160) ------------------------------------------------------------------------------------ Total net assets $1,159,249,505 ==================================================================================== NET ASSET VALUE PER SHARE: (No par value, unlimited number of shares authorized) Class A (based on $980,013,132/24,474,462 shares) $ 40.04 Class B (based on $7,527,291/234,359 shares) $ 32.12 Class C (based on $68,639,106/2,069,525 shares) $ 33.17 Class R (based on $10,109,274/256,327 shares) $ 39.44 Class Y (based on $92,960,702/2,213,280 shares) $ 42.00 MAXIMUM OFFERING PRICE: Class A ($40.04 (divided by) 94.25%) $ 42.48 ==================================================================================== The accompanying notes are an integral part of these financial statements. 28 Pioneer Select Mid Cap Growth Fund | Semiannual Report | 5/31/14 Statement of Operations (unaudited) For the Six Months Ended 5/31/14 INVESTMENT INCOME: Dividends (net of foreign taxes withheld of $1,849) $ 3,372,656 Interest 21,655 ------------------------------------------------------------------------------------------ Total investment income $ 3,394,311 ========================================================================================== EXPENSES: Management fees $ 3,530,980 Transfer agent fees and expenses Class A 456,545 Class B 27,463 Class C 26,022 Class R 1,851 Class Y 4,071 Distribution fees Class A 1,216,301 Class B 42,228 Class C 340,481 Class R 24,702 Shareholder communication expense 443,872 Administrative reimbursements 195,894 Custodian fees 17,404 Registration fees 41,737 Professional fees 48,767 Printing expense 34,407 Fees and expenses of nonaffiliated Trustees 19,486 Miscellaneous 9,812 ------------------------------------------------------------------------------------------ Total expenses $ 6,482,023 ------------------------------------------------------------------------------------------ Net investment loss $ (3,087,712) ------------------------------------------------------------------------------------------ REALIZED AND UNREALIZED GAIN (LOSS) ON INVESTMENTS AND WRITTEN OPTIONS: Net realized gain on: Investments $ 96,735,665 Other assets and liabilities denominated in foreign currencies (13,630) $ 96,722,035 ------------------------------------------------------------------------------------------ Change in net unrealized appreciation (depreciation) on: Investments $ (19,828,846) Written options (149) Other assets and liabilities denominated in foreign currencies (1,008) $ (19,830,003) ------------------------------------------------------------------------------------------ Net gain on investments $ 76,892,032 ------------------------------------------------------------------------------------------ Net increase in net assets resulting from operations $ 73,804,320 ========================================================================================== The accompanying notes are an integral part of these financial statements. Pioneer Select Mid Cap Growth Fund | Semiannual Report | 5/31/14 29 Statements of Changes in Net Assets ---------------------------------------------------------------------------------------------- Six Months Ended 5/31/14 Year Ended (unaudited) 11/30/13 ---------------------------------------------------------------------------------------------- FROM OPERATIONS: Net investment loss $ (3,087,712) $ (4,288,699) Net realized gain on investments 96,722,035 128,681,381 Change in net unrealized appreciation (depreciation) on investments (19,830,003) 110,946,189 ---------------------------------------------------------------------------------------------- Net increase in net assets resulting from operations $ 73,804,320 $ 235,338,871 ---------------------------------------------------------------------------------------------- DISTRIBUTIONS TO SHAREOWNERS: Net realized gain: Class A ($0.00 and $5.17* per share, respectively) $ -- $ (77,659,880) Class B ($0.00 and $1.76 per share, respectively) -- (501,362) Class C ($0.00 and $4.95* per share, respectively) -- (4,990,691) Class R ($0.00 and $1.76 per share, respectively) -- (435,729) Class Y ($0.00 and $5.20* per share, respectively) -- (14,582,306) ---------------------------------------------------------------------------------------------- Total distributions to shareowners $ -- $ (98,169,968) ---------------------------------------------------------------------------------------------- FROM FUND SHARE TRANSACTIONS: Net proceeds from sale or exchange of shares $ 61,264,242 $ 61,915,865 Shares issued in reorganization -- 575,347,564 Reinvestment of distributions -- 89,555,900 Cost of shares repurchased (126,157,303) (164,155,418) ---------------------------------------------------------------------------------------------- Net increase (decrease) in net assets resulting from Fund share transactions $ (64,893,061) $ 562,663,911 ---------------------------------------------------------------------------------------------- Net increase in net assets $ 8,911,259 $ 699,832,814 NET ASSETS: Beginning of period 1,150,338,246 450,505,432 ---------------------------------------------------------------------------------------------- End of period $ 1,159,249,505 $1,150,338,246 ---------------------------------------------------------------------------------------------- Undistributed (distributions in excess of) net investment income $ (2,757,383) $ 330,329 ============================================================================================== * Historical per share amounts prior to June 7, 2013 have been adjusted to reflect the conversion ratios used for the reorganization of the Fund (formerly known as Pioneer Growth Opportunities Fund) with Pioneer Select Mid Cap Growth Fund. The accompanying notes are an integral part of these financial statements. 30 Pioneer Select Mid Cap Growth Fund | Semiannual Report | 5/31/14 ----------------------------------------------------------------------------------------- '14 Shares '14 Amount (unaudited) (unaudited) '13 Shares '13 Amount ----------------------------------------------------------------------------------------- Class A* Shares sold 860,503 $ 33,677,712 869,576 $ 31,042,240 Shares issued in reorganization -- -- 14,033,389 480,408,023 Reinvestment of distributions -- -- 2,121,622 74,791,090 Less shares repurchased (1,599,226) (62,606,341) (2,388,188) (84,583,556) ----------------------------------------------------------------------------------------- Net increase (decrease) (738,723) $ (28,928,629) 14,636,399 $501,657,797 ========================================================================================= Class B Shares sold or exchanged 2,207 $ 71,272 10,174 $ 302,228 Shares issued in reorganization -- -- 344,312 9,689,683 Reinvestment of distributions -- -- 16,318 493,621 Less shares repurchased (69,352) (2,189,843) (69,300) (2,072,494) ----------------------------------------------------------------------------------------- Net increase (decrease) (67,145) $ (2,118,571) 301,504 $ 8,413,038 ========================================================================================= Class C* Shares sold 172,735 $ 5,644,342 302,146 $ 9,332,626 Shares issued in reorganization -- -- 1,500,584 43,279,821 Reinvestment of distributions -- -- 126,461 3,770,515 Less shares repurchased (218,924) (7,089,671) (283,509) (8,546,394) ----------------------------------------------------------------------------------------- Net increase (decrease) (46,189) $ (1,445,329) 1,645,682 $ 47,836,568 ========================================================================================= Class R Shares sold 75,057 $ 2,914,674 50,406 $ 1,834,987 Shares issued in reorganization -- -- 254,059 8,602,193 Reinvestment of distributions -- -- 10,855 401,099 Less shares repurchased (81,764) (3,160,762) (52,286) (1,896,736) ----------------------------------------------------------------------------------------- Net increase (decrease) (6,707) $ (246,088) 263,034 $ 8,941,543 ========================================================================================= Class Y* Shares sold 460,077 $ 18,956,242 521,105 $ 19,403,784 Shares issued in reorganization -- -- 934,367 33,367,844 Reinvestment of distributions -- -- 283,655 10,099,575 Less shares repurchased (1,264,371) (51,110,686) (1,818,152) (67,056,238) ----------------------------------------------------------------------------------------- Net decrease (804,294) $ (32,154,444) (79,025) $ (4,185,035) ========================================================================================= * Historical share amounts prior to June 7, 2013 have been adjusted to reflect the conversion ratios used for the reorganization of the Fund (formerly known as Pioneer Growth Opportunities Fund) with Pioneer Select Mid Cap Growth Fund. The accompanying notes are an integral part of these financial statements. Pioneer Select Mid Cap Growth Fund | Semiannual Report | 5/31/14 31 Financial Highlights ------------------------------------------------------------------------------------------------------------------------------------ Six Months Ended Year Year Year Year Year 5/31/14 Ended Ended Ended Ended Ended (unaudited) 11/30/13 (a) 11/30/12 (a) 11/30/11 (a) 11/30/10 (a) 11/30/09 (a)(b) ------------------------------------------------------------------------------------------------------------------------------------ Class A Net asset value, beginning of period $ 37.55 $ 31.75 $ 29.64 $ 28.02 $ 23.17 $ 16.03 ------------------------------------------------------------------------------------------------------------------------------------ Increase (decrease) from investment operations: Net investment loss $ (0.10) $ (0.14) $ (0.18) $ (0.15) $ (0.13) $ (0.10) Net realized and unrealized gain (loss) on investments and foreign currency transactions 2.59 11.11 2.29 1.77 4.98 7.34 ------------------------------------------------------------------------------------------------------------------------------------ Net increase (decrease) from investment operations $ 2.49 $ 10.97 $ 2.11 $ 1.62 $ 4.85 $ 7.24 ------------------------------------------------------------------------------------------------------------------------------------ Distributions to shareowners: Net realized gain $ -- $ (5.17) $ -- $ -- $ -- $ (0.10) ------------------------------------------------------------------------------------------------------------------------------------ Net increase (decrease) in net asset value $ 2.49 $ 5.80 $ 2.11 $ 1.62 $ 4.85 $ 7.14 ------------------------------------------------------------------------------------------------------------------------------------ Net asset value, end of period $ 40.04 $ 37.55 $ 31.75 $ 29.64 $ 28.02 $ 23.17 ==================================================================================================================================== Total return* 6.63% 36.96% 7.11%(d) 5.79%(c) 20.92% 45.46% Ratio of net expenses to average net assets 1.08%** 1.12% 1.16% 1.15% 1.21% 1.29% Ratio of net investment loss to average net assets (0.50)%** (0.56)% (0.54)% (0.44)% (0.61)% (0.39)% Portfolio turnover rate 95%** 100% 86% 81% 88% 91% Net assets, end of period (in thousands) $ 980,013 $946,725 $ 335,702 $ 362,504 $ 387,037 $73,077 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Total expenses 1.08%** 1.12% 1.16% 1.15% 1.21% 1.29% Net investment loss (0.50)%** (0.56)% (0.54)% (0.44)% (0.61)% (0.39)% ==================================================================================================================================== * 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) The Fund acquired the assets and liabilities of Pioneer Select Mid Cap Growth Fund (the "predecessor fund") on June 7, 2013 (the "reorganization"). As a result of the reorganization, the predecessor fund's performance and financial history became the performance and financial history of the Fund. Historical per-share amounts prior to June 7, 2013 have been adjusted to reflect the conversion ratio used to align the net asset values of the predecessor fund with those of the Fund. See Notes to Financial Statements -- Note 1. (b) Effective May 15, 2009, Pioneer Investment Management, Inc. became the adviser of the Fund. (c) If the Fund had not recognized gains in settlement of class action lawsuits during the year ended November 30, 2011, the total return would have been 5.61%. (d) If the Fund had not recognized gains in settlement of class action lawsuits during the year ended November 30, 2012, the total return would have been 7.02%. The accompanying notes are an integral part of these financial statements. 32 Pioneer Select Mid Cap Growth Fund | Semiannual Report | 5/31/14 -------------------------------------------------------------------------------- Six Months Ended 5/31/14 6/7/13 (a) (unaudited) to 11/30/13 -------------------------------------------------------------------------------- Class B Net asset value, beginning of period $ 30.34 $ 28.14 -------------------------------------------------------------------------------- Increase from investment operations: Net investment loss $ (0.35) $ (0.30) Net realized and unrealized gain on investments 2.13 4.26 -------------------------------------------------------------------------------- Net increase in net assets from investment operations $ 1.78 $ 3.96 -------------------------------------------------------------------------------- Distributions to shareowners: Net realized gain $ -- $ (1.76) -------------------------------------------------------------------------------- Net increase (decrease) in net asset value $ 1.78 $ 2.20 -------------------------------------------------------------------------------- Net asset value, end of period $ 32.12 $ 30.34 ================================================================================ Total return* 5.87% 14.08%*** Ratio of net expenses to average net assets 2.52%** 2.58%** Ratio of net investment loss to average net assets (1.94)%** (2.06)%** Portfolio turnover rate 95%** 100%** Net assets, end of period (in thousands) $ 7,527 $ 9,146 Ratios with no waiver of fees and assumption of expenses by the Adviser: Total expenses 2.52%** 2.58%** Net investment loss (1.94)%** (2.06)%** ================================================================================ (a) Financial reporting for Class B shares commenced on June 7, 2013. See Notes to Financial Statements -- Note 1. * Assumes initial investment at net asset value at the beginning of the period, reinvestment of all distributions and the complete redemption of the investment at net asset value at the end of the period and no sales charges. Total return would be reduced if sales charges were taken into account. ** Annualized. *** Not annualized. The accompanying notes are an integral part of these financial statements. Pioneer Select Mid Cap Growth Fund | Semiannual Report | 5/31/14 33 Financial Highlights (continued) ------------------------------------------------------------------------------------------------------------------------------------ Six Months Ended Year Year Year Year Year 5/31/14 Ended Ended Ended Ended Ended (unaudited) 11/30/13 (a) 11/30/12 (a) 11/30/11 (a) 11/30/10 (a) 11/30/09 (a)(b) ------------------------------------------------------------------------------------------------------------------------------------ Class C Net asset value, beginning of period $ 31.23 $ 27.15 $ 25.60 $ 24.43 $ 20.40 $ 14.22 ------------------------------------------------------------------------------------------------------------------------------------ Increase (decrease) from investment operations: Net investment loss $ (0.21) $ (0.24) $ (0.44) $ (0.38) $ (0.31) $ (0.27) Net realized and unrealized gain (loss) on investments and foreign currency transactions 2.15 9.27 1.99 1.55 4.34 6.54 ------------------------------------------------------------------------------------------------------------------------------------ Net increase (decrease) from investment operations $ 1.94 $ 9.03 $ 1.55 $ 1.17 $ 4.03 $ 6.27 ------------------------------------------------------------------------------------------------------------------------------------ Distributions to shareowners: Net realized gain $ -- $ (4.95) $ -- $ -- $ -- $ (0.09) ------------------------------------------------------------------------------------------------------------------------------------ Net increase (decrease) in net asset value $ 1.94 $ 4.08 $ 1.55 $ 1.17 $ 4.03 $ 6.18 ------------------------------------------------------------------------------------------------------------------------------------ Net asset value, end of period $ 33.17 $ 31.23 $ 27.15 $ 25.60 $ 24.43 $ 20.40 ==================================================================================================================================== Total return* 6.21% 35.76% 6.05%(d) 4.80%(c) 19.79% 44.43% Ratio of net expenses to average net assets 1.90%** 1.97% 2.16% 2.07% 2.14% 2.31% Ratio of net investment loss to average net assets (1.31)%** (1.43)% (1.54)% (1.37)% (1.54)% (1.44)% Portfolio turnover rate 95%** 100% 86% 81% 88% 91% Net assets, end of period (in thousands) $ 68,639 $66,069 $ 12,761 $ 13,090 $ 13,565 $ 5,017 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Total expenses 1.90%** 1.97% 2.16% 2.07% 2.25% 2.31% Net investment loss (1.31)%** (1.43)% (1.54)% (1.37)% (1.64)% (1.44)% ==================================================================================================================================== * 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) The Fund acquired the assets and liabilities of Pioneer Select Mid Cap Growth Fund (the "predecessor fund") on June 7, 2013 (the "reorganization"). As a result of the reorganization, the predecessor fund's performance and financial history became the performance and financial history of the Fund. Historical per-share amounts prior to June 7, 2013 have been adjusted to reflect the conversion ratio used to align the net asset values of the predecessor fund with those of the Fund. See Notes to Financial Statements -- Note 1. (b) Effective May 15, 2009, Pioneer Investment Management, Inc. became the adviser of the Fund. (c) If the Fund had not recognized gains in settlement of class action lawsuits during the year ended November 30, 2011, the total return would have been 4.67%. (d) If the Fund had not recognized gains in settlement of class action lawsuits during the year ended November 30, 2012, the total return would have been 5.97%. The accompanying notes are an integral part of these financial statements. 34 Pioneer Select Mid Cap Growth Fund | Semiannual Report | 5/31/14 -------------------------------------------------------------------------------- Six Months Ended 5/31/14 6/7/13 (a) (unaudited) to 11/30/13 -------------------------------------------------------------------------------- Class R Net asset value, beginning of period $ 37.05 $ 33.86 -------------------------------------------------------------------------------- Increase from investment operations: Net investment loss $ (0.17) $ (0.17) Net realized and unrealized gain on investments 2.56 5.12 -------------------------------------------------------------------------------- Net increase in net assets from investment operations $ 2.39 $ 4.95 -------------------------------------------------------------------------------- Distributions to shareowners: Net realized gain $ -- $ (1.76) -------------------------------------------------------------------------------- Net increase (decrease) in net asset value $ 2.39 $ 3.19 -------------------------------------------------------------------------------- Net asset value, end of period $ 39.44 $ 37.05 ================================================================================ Total return* 6.45% 14.62%*** Ratio of net expenses to average net assets 1.46%** 1.52%** Ratio of net investment loss to average net assets (0.87)%** (1.00)%** Portfolio turnover rate 95%** 100%** Net assets, end of period (in thousands) $ 10,109 $ 9,746 Ratios with no waiver of fees and assumption of expenses by the Adviser: Total expenses 1.46%** 1.52%** Net investment loss (0.87)%** (1.00)%** ================================================================================ (a) Financial reporting for Class R shares commenced on June 7, 2013. See Notes to Financial Statements -- Note 1. * Assumes initial investment at net asset value at the beginning of the period, reinvestment of all distributions and the complete redemption of the investment at net asset value at the end of the period and no sales charges. Total return would be reduced if sales charges were taken into account. ** Annualized. *** Not annualized. The accompanying notes are an integral part of these financial statements. Pioneer Select Mid Cap Growth Fund | Semiannual Report | 5/31/14 35 Financial Highlights (continued) ------------------------------------------------------------------------------------------------------------------------------------ Six Months Ended Year Year Year Year Year 5/31/14 Ended Ended Ended Ended Ended (unaudited) 11/30/13 (a) 11/30/12 (a) 11/30/11 (a) 11/30/10 (a) 11/30/09 (a)(b) ------------------------------------------------------------------------------------------------------------------------------------ Class Y Net asset value, beginning of period $ 39.32 $ 32.95 $ 30.63 $ 28.84 $ 23.75 $ 16.36 ------------------------------------------------------------------------------------------------------------------------------------ Increase (decrease) from investment operations: Net investment loss $ (0.04) $ (0.06) $ (0.04) $ (0.00)(c) $ (0.04) $ (0.02) Net realized and unrealized gain (loss) on investments and foreign currency transactions 2.72 11.63 2.36 1.79 5.13 7.51 ------------------------------------------------------------------------------------------------------------------------------------ Net increase (decrease) from investment operations $ 2.68 $ 11.57 $ 2.32 $ 1.79 $ 5.09 $ 7.49 ------------------------------------------------------------------------------------------------------------------------------------ Distributions to shareowners: Net realized gain $ -- $ (5.20) $ -- $ -- $ -- $ (0.10) ------------------------------------------------------------------------------------------------------------------------------------ Net increase (decrease) in net asset value $ 2.68 $ 6.37 $ 2.32 $ 1.79 $ 5.09 $ 7.39 ------------------------------------------------------------------------------------------------------------------------------------ Net asset value, end of period $ 42.00 $ 39.32 $ 32.95 $ 30.63 $ 28.84 $ 23.75 ==================================================================================================================================== Total return* 6.81% 37.40% 7.60%(f) 6.20%(e) 21.45% 46.08% Ratio of net expenses to average net assets 0.75%** 0.76% 0.73% 0.71% 0.74% 0.97% Ratio of net investment loss to average net assets (0.17)%** (0.18)% (0.11)% (0.00)(d) (0.14)% (0.05)% Portfolio turnover rate 95%** 100% 86% 81% 88% 91% Net assets, end of period (in thousands) $ 92,961 $118,651 $ 102,042 $ 83,460 $ 107,870 $81,580 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Total expenses 0.75%** 0.76% 0.73% 0.71% 0.74% 0.97% Net investment loss (0.17)%** (0.18)% (0.11)% (0.00)%(d) (0.14)% (0.05)% ==================================================================================================================================== * Assumes initial investment at net asset value at the beginning of each period, reinvestment of all distributions and the complete redemption of the investment at net asset value at the end of each period. ** Annualized. (a) The Fund acquired the assets and liabilities of Pioneer Select Mid Cap Growth Fund (the "predecessor fund") on June 7, 2013 (the "reorganization"). As a result of the reorganization, the predecessor fund's performance and financial history became the performance and financial history of the Fund. Historical per-share amounts prior to June 7, 2013 have been adjusted to reflect the conversion ratio used to align the net asset values of the predecessor fund with those of the Fund. See Notes to Financial Statements -- Note 1. (b) Effective May 15, 2009, Pioneer Investment Management, Inc. became the adviser of the Fund. (c) Rounds to less than $0.01 or $(0.01) per share. (d) Rounds to less than 0.01%. (e) If the Fund had not recognized gains in settlement of class action lawsuits during the year ended November 30, 2011, the total return would have been 6.08%. (f) If the Fund had not recognized gains in settlement of class action lawsuits during the year ended November 30, 2012, the total return would have been 7.52%. The accompanying notes are an integral part of these financial statements. 36 Pioneer Select Mid Cap Growth Fund | Semiannual Report | 5/31/14 Notes to Financial Statements | 5/31/14 (unaudited) 1. Organization and Significant Accounting Policies Pioneer Select Mid Cap Growth Fund (the Fund) is one of two portfolios comprising Pioneer Series Trust II, a Delaware statutory trust. The Fund is registered under the Investment Company Act of 1940 as a diversified, open-end management investment company. The Fund acquired the assets and liabilities of Pioneer Select Mid Cap Growth Fund (the "predecessor fund"), a series of Pioneer Series Trust I on June 7, 2013. The predecessor fund was the accounting survivor of the reorganization. Accordingly, the predecessor fund's performance and financial history became the performance and financial history of the Fund. The financial highlights and shareholder activity, as reflected in the Statement of Changes in net assets, have been adjusted to reflect the conversion ratios used for the reorganization of the Fund with the predecessor fund. Prior to the reorganization, the Fund was named Pioneer Growth Opportunities Fund. The predecessor fund acquired the assets and stated liabilities of the Regions Morgan Keegan Select Mid Cap Growth Fund on May 15, 2009. The investment objective of the Fund is long-term capital growth. The Fund offers five classes of shares designated as Class A, Class B, Class C, Class R and Class Y shares. The predecessor fund did not offer Class B shares or Class R shares. Accordingly, financial reporting for Class B shares and Class R shares commenced on June 7, 2013, and no financial information has been presented for Class B shares or Class R shares for prior periods. Each class of shares represents an interest in the same portfolio of investments of the Fund and has identical rights (based on relative net asset values) to assets and liquidation proceeds. Share classes can bear different rates of class-specific fees and expenses such as transfer agent and distribution fees. Differences in class-specific fees and expenses will result in differences in net investment income and, therefore, the payment of different dividends from net investment income earned by each class. The Amended and Restated Declaration of Trust of the Fund gives the Board the flexibility to specify either per share voting or dollar-weighted voting when submitting matters for shareholder approval. Under per share voting, each share of a class of the Fund is entitled to one vote. Under dollar-weighted voting, a shareholder's voting power is determined not by the number of shares owned, but by the dollar value of the shares on the record date. Each share class has exclusive voting rights with respect to matters affecting only that class, including with respect to the distribution plan for that class. There is no distribution plan for Class Y shares. Class B shares convert to Class A shares approximately eight years after the date of purchase. Pioneer Select Mid Cap Growth Fund | Semiannual Report | 5/31/14 37 The Fund's financial statements have been prepared in conformity with U.S. generally accepted accounting principles that require the management of the Fund to, among other things, make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of income, expenses and gains and losses on investments during the reporting period. Actual results could differ from those estimates. The following is a summary of significant accounting policies followed by the Fund in the preparation of its financial statements, which are consistent with those policies generally accepted in the investment company industry: A. Security Valuation Security transactions are recorded as of trade date. The net asset value of the Fund is computed once daily, on each day the New York Stock Exchange (NYSE) is open, as of the close of regular trading on the NYSE. In computing the net asset value, securities that have traded on an exchange are valued at the last sale price on the principal exchange where they are traded. Securities that have not traded on the date of valuation, or securities for which sale prices are not available, generally are valued at the mean between the last bid and asked prices. Short-term fixed income securities with remaining maturities of sixty days or less generally are valued at amortized cost. Shares of money market mutual funds are valued at such funds' net asset value. Trading in foreign securities is substantially completed each day at various times prior to the close of the NYSE. The values of such securities used in computing the net asset value of the Fund's shares are determined as of such times. Securities for which independent pricing services are unable to supply prices or for which market prices and/or quotations are not readily available or are considered to be unreliable are valued by a fair valuation team comprised of certain personnel of Pioneer Investment Management, Inc. (PIM), the Fund's investment adviser, pursuant to procedures adopted by the Fund's Board of Trustees. PIM's fair valuation team uses fair value methods approved by the Valuation Committee of the Board of Trustees. PIM's fair valuation team is responsible for monitoring developments that may impact fair valued securities and for discussing and assessing fair values on an ongoing basis, and at least quarterly, with the Valuation Committee of the Board of Trustees. Inputs used when applying fair value methods to value a security may include credit ratings, the financial condition of the company, current market conditions and comparable securities. The Fund may use fair value methods if it is determined that a significant event has occurred after the close of the exchange or market on which the security trades and prior to the 38 Pioneer Select Mid Cap Growth Fund | Semiannual Report | 5/31/14 determination of the Fund's net asset value. Examples of a significant event might include political or economic news, corporate restructurings, natural disasters, terrorist activity or trading halts. Thus, the valuation of the Fund's securities may differ significantly from exchange prices and such differences could be material. At May 31, 2014, there were no securities that were valued using fair value methods (other than securities that were valued using prices supplied by independent pricing services or broker-dealers). 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 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. B. Federal Income Taxes It is the Fund's policy to comply with the requirements of the Internal Revenue Code applicable to regulated investment companies and to distribute all of its taxable income and net realized capital gains, if any, to its shareowners. Therefore, no provision for federal income taxes is required. As of November 30, 2013, 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 are subject to examination by Federal and State tax authorities. The amount and character of income and capital gain distributions to shareowners are determined in accordance with federal income tax rules, which may differ from U.S. generally accepted accounting principles. Distributions in excess of net investment income or net realized gains are temporary overdistributions for financial statement purposes resulting from differences in the recognition or classification of income or distributions for financial statement and tax purposes. Capital accounts within the financial statements are adjusted for permanent book/tax differences to reflect tax character, but are not adjusted for temporary differences. Pioneer Select Mid Cap Growth Fund | Semiannual Report | 5/31/14 39 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, 2013 was as follows: ---------------------------------------------------------------------------- 2013 ---------------------------------------------------------------------------- Distributions paid from: Ordinary Income $ 4,565,456 Long-term capital gain 93,604,512 ---------------------------------------------------------------------------- Total $98,169,968 ============================================================================ The following shows the components of distributable earnings on a federal income tax basis at November 30, 2013: ---------------------------------------------------------------------------- 2013 ---------------------------------------------------------------------------- Distributable earnings: Undistributed long-term gain $ 9,634,949 Net unrealized appreciation 291,453,022 ---------------------------------------------------------------------------- Total $301,087,971 ============================================================================ Due to a different tax survivor and different tax year end, the tax amounts include those related to the Fund for the tax period January 1, 2013 to November 30, 2013. The difference between book-basis and tax-basis net unrealized appreciation is attributable to the tax deferral of losses on wash sales and the tax basis adjustments on other holdings. C. Fund Shares The Fund records sales and repurchases of its shares as of trade date. Pioneer Funds Distributor, Inc. (PFD), the principal underwriter for the Fund and a wholly owned indirect subsidiary of UniCredit S.p.A. (UniCredit), earned $40,912 in underwriting commissions on the sale of Class A shares during the six months ended May 31, 2014. D. Class Allocations Income, common expenses and realized and unrealized gains and losses are calculated at the Fund level and allocated daily to each class of shares based on its respective percentage of adjusted net assets at the beginning of the day. Distribution fees are calculated based on the average daily net asset value attributable to Class A, Class B, Class C and Class R shares of the Fund, respectively (see Note 4). Class Y shares do not pay distribution fees. All expenses and fees 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). 40 Pioneer Select Mid Cap Growth Fund | Semiannual Report | 5/31/14 Distributions to shareowners are recorded as of the ex-dividend date. Distributions paid by the Fund with respect to each class of shares are calculated in the same manner and at the same time, except that net investment income dividends to Class A, Class B, Class C, Class R and Class Y shares can reflect different transfer agent and distribution expense rates. E. Risks At times, the Fund's investments may represent industries or industry sectors that are interrelated or have common risks, making the Fund more susceptible to any economic, political or regulatory developments or other risks affecting these industries or 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. F. 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. G. Option Writing The Fund may write put and covered call options to seek to increase total return. When an option is written, the Fund receives a premium and becomes obligated to purchase or sell the underlying security at a fixed price, upon the exercise of the option. When the Fund writes an option, an amount equal to the premium received by the Fund is recorded as a liability and is subsequently adjusted to the current value of the option written. Premiums received from writing options that expire unexercised are treated by the Fund on the expiration date as realized gains from investments. The difference between the premium and the amount paid on effecting a closing purchase transaction, including brokerage commissions, is also treated as a realized gain, or, if the premium is less than the amount paid for the closing purchase transaction, as a realized loss. If a call option is exercised, the premium is added to the proceeds from the sale of the underlying security in determining whether the Fund has realized a gain or loss. The Fund as writer of an option bears the market risk of an unfavorable change in the price of the security underlying the written option. Pioneer Select Mid Cap Growth Fund | Semiannual Report | 5/31/14 41 The value of contracts open during the one month ended May 31, 2014 was $59,738. Written put option contracts outstanding at period end are listed at the end of the Fund's schedule of investments. The Fund held one written call option contract that was open at May 31, 2014. If the call option had been exercised at May 31, 2014, the maximum amount the Fund would have been required to pay was $59,589. Transactions in written call options for the six months ended May 31, 2014 are summarized as follows: ------------------------------------------------------------------------------------- Number of Contracts Premiums Received ------------------------------------------------------------------------------------- Options outstanding at beginning of period -- $ -- Options opened (295) (59,589) Options exercised -- -- Options closed -- -- Options expired -- -- ------------------------------------------------------------------------------------- Options outstanding at end of period (295) $ (59,589) ===================================================================================== H. Purchased Options The Fund may purchase call and put options in order to seek to increase total return. Purchased call and put options entitle the Fund to buy and sell a specified number of shares or units of a particular security, currency or index at a specified price at a specific date or within a specific period of time. Upon the purchase of a call or put option, the premium paid by the Fund is included in the Statement of Assets and Liabilities as an investment. All premiums are marked-to-market daily, and any unrealized gains or losses are recorded in the Fund's financial statements. As the purchaser of an index option, the Fund has the right to receive a cash payment equal to any depreciation in the value of the index below the strike price of the option (in the case of a put) or equal to any appreciation in the value of the index over the strike price of the option (in the case of a call) as of the valuation date of the option. Premiums paid for purchased calls and put options which have expired are treated as realized losses on investments in the Statement of Operations. Upon the exercise or closing of a purchased put option, the premium is offset against the proceeds on the sale of the underlying security or financial instrument in order to determine the realized gain or loss on investments. Upon the exercise or closing of a purchased call option, the premium is added to the cost of the security or financial instrument. The risk associated with purchasing options is limited to the premium originally paid. During the six months ended May 31, 2014, the Fund had no purchased options. 42 Pioneer Select Mid Cap Growth Fund | Semiannual Report | 5/31/14 2. Management Agreement PIM, a wholly owned indirect subsidiary of UniCredit, manages the Fund's portfolio. Management fees are calculated daily at an annual rate equal to 0.625% of the Fund's average daily net assets up to $500 million, 0.60% of the next $500 million and 0.575% on assets over $1 billion. Prior to June 7, 2013, the Fund paid an annual fee equal to 0.65% of the Fund's average daily net assets. Prior to June 7, 2013, the predecessor fund paid a management fee at an annual rate equal to 0.625% of the predecessor fund's average daily net assets up to $500 million, 0.60% of the next $500 million and 0.575% on assets over $1 billion. Morgan Asset Management, Inc. (MAM) served as the investment adviser to the predecessor Regions Morgan Keegan Select Mid Cap Growth Fund through May 15, 2009. For the six months ended May 31, 2014, the effective management fee was equivalent to 0.61% of the Fund's average daily net assets. In addition, under the management and administration agreements, certain other services and costs, including accounting, regulatory reporting and insurance premiums, are paid by the Fund as administrative reimbursements. Included in "Due to affiliates" reflected on the Statement of Assets and Liabilities is $71,118 in management fees, administrative costs and certain other reimbursements payable to PIM at May 31, 2014. 3. Transfer Agent PIMSS, a wholly owned indirect subsidiary of UniCredit, provides substantially all transfer agent and shareowner services to the Fund at negotiated rates. In addition, the Fund reimburses PIMSS for out-of-pocket expenses incurred by PIMSS related to shareholder communications activities such as proxy and statement mailings, outgoing phone calls and omnibus relationship contracts. For the six months ended May 31, 2014, such out-of-pocket expenses by class of shares were as follows: -------------------------------------------------------------------------------- Shareholder Communications: -------------------------------------------------------------------------------- Class A $335,253 Class B 8,510 Class C 51,330 Class R 12,281 Class Y 36,498 -------------------------------------------------------------------------------- Total $443,872 ================================================================================ Included in "Due to affiliates" reflected on the Statement of Assets and Liabilities is $172,965 in transfer agent fees and out-of-pocket reimbursements payable to PIMSS at May 31, 2014. Pioneer Select Mid Cap Growth Fund | Semiannual Report | 5/31/14 43 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 $29,030 in distribution fees payable to PFD at May 31, 2014. In addition, redemptions of each class of shares (except Class Y shares) may be subject to a contingent deferred sales charge (CDSC). A CDSC of 1.00% may be imposed on redemptions of certain net asset value purchases of Class A shares within 12 months of purchase. Redemptions of Class C shares within one year of purchase are subject to a CDSC of 1.00%, based on the lower of cost or market value of shares being redeemed. Shares purchased as part of an exchange remain subject to any CDSC that applied to the original purchase of those shares. There is no CDSC for Class Y shares. Proceeds from the CDSCs are paid to PFD. For the six months ended May 31, 2014, CDSCs in the amount of $2,137 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, 2014, the Fund's expenses were not reduced under such arrangements. 6. Line of Credit Facility The Fund, along with certain other funds in the Pioneer Family of Funds (the Funds), participates in a committed, unsecured revolving line of credit facility. Borrowings are used solely for temporary or emergency purposes. The Fund may borrow up to the lesser of the amount available under the facility or the limits set for borrowing by the Fund's prospectus and the 1940 Act. The credit facility in effect until February 12, 2014 was in the amount of $215 million. As of February 12, 2014, the facility is in the amount of $240 million. Under such facility, depending on the type of loan, interest on borrowings is payable at the London Interbank Offered Rate (LIBOR) plus 0.90% (0.85% as of February 12, 2014) on an annualized basis, or the Alternate Base Rate, which is the greater of (a) the facility's administrative agent's daily announced prime rate on the borrowing date, (b) 2% plus the Federal Funds Rate on the borrowing date and 44 Pioneer Select Mid Cap Growth Fund | Semiannual Report | 5/31/14 (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, 2014, the Fund had no outstanding borrowings. 7. 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, 2014. ----------------------------------------------------------------------------------------------- Assets: Gross Amounts Net Gross Amounts Not Offset Offset Amounts of in the Statement of in the Assets Assets and Liabilities Gross Statement Presented in ------------------------- Amounts of of Assets the Statement Cash Recognized and of Assets and Financial Collateral Net Description Assets Liabilities Liabilities Instruments Received Amount ---------------------------------------------------------------------------------------------- Written options $-- $-- $-- $-- $-- $-- ---------------------------------------------------------------------------------------------- $-- $-- $-- $-- $-- $-- ---------------------------------------------------------------------------------------------- ----------------------------------------------------------------------------------------------- Liabilities: Gross Amounts Net Gross Amounts Not Offset Offset Amounts of in the Statement of in the Assets Assets and Liabilities Gross Statement Presented in ------------------------- Amounts of of Assets the Statement Cash Recognized and of Assets and Financial Collateral Net Description Liabilities Liabilities Liabilities Instruments Received Amount ----------------------------------------------------------------------------------------------- Written options $59,738 $-- $59,738 $-- $-- $59,738 ----------------------------------------------------------------------------------------------- $59,738 $-- $59,738 $-- $-- $59,738 ----------------------------------------------------------------------------------------------- 8. Additional Disclosures about Derivative Instruments and Hedging Activities Values of derivative instruments as of May 31, 2014 were as follows: ----------------------------------------------------------------------------------------- Derivatives Not Accounted for as Asset Derivatives 2014 Liabilities Derivatives 2014 Hedging Instruments --------------------------------------------------------------- Under Accounting Statement of Assets Statement of Assets Standards Codification and Liabilities and Liabilities (ASC) 815 Location Value Location Value ----------------------------------------------------------------------------------------- Written Options Net unrealized Net unrealized appreciation on depreciation on written options $ -- written options $149 ----------------------------------------------------------------------------------------- Total $ -- $149 ========================================================================================= Pioneer Select Mid Cap Growth Fund | Semiannual Report | 5/31/14 45 The effect of derivative instruments on the Statement of Operations for the six months ended May 31, 2014 was as follows: ----------------------------------------------------------------------------------------- Change in Derivatives Not Unrealized Accounted for as Realized Gain appreciation Hedging Instruments (Loss) on (depreciation) 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 ----------------------------------------------------------------------------------------- Written Options Net realized gain (loss) on written options $ -- Written Options Change in net unrealized appreciation (depreciation) on written options $(149) 9. Reorganization Information On June 7, 2013 ("Closing Date"), the predecessor fund was reorganized with the Fund. The purpose of this transaction was to combine two funds (managed by PIM) with similar investment objectives and strategies. This tax-free reorganization was accomplished by exchanging the assets and liabilities of the predecessor fund for shares of the Fund. Shareowners holding Class A, Class C and Class Y shares of the predecessor fund received Class A, Class C and Class Y shares of the Fund, respectively, in the reorganization. The predecessor fund did not offer Class B shares or Class R shares. Financial reporting for Class B shares and Class R shares commenced on June 7, 2013. The investment portfolio of the predecessor fund, with an aggregate value of $552,334,360 and an identified cost of $442,091,974 at June 7, 2013, was the principal asset acquired by the Fund. For financial reporting purposes, assets received and shares issued by the Fund were recorded at net asset value, however, the cost basis of the investments received from the predecessor fund was carried forward to align ongoing reporting of the Fund's realized and unrealized gains and losses with amounts distributable to shareowners for tax reporting purposes. The Fund was the legal survivor of the reorganization. The predecessor fund was the accounting survivor of the reorganization. Accordingly, the predecessor fund's performance and financial history became the performance and financial history of the Fund. Prior to the reorganization, the Fund was named Pioneer Growth Opportunities Fund. 46 Pioneer Select Mid Cap Growth Fund | Semiannual Report | 5/31/14 The following charts show the details of the reorganization as of the Closing Date: ---------------------------------------------------------------------------------------------------- Pioneer Growth Pioneer Select Mid Pioneer Select Mid Opportunities Fund Cap Growth Fund Cap Growth Fund (Pre-Reorganization) (Pre-Reorganization) (Pre-Reorganization) ---------------------------------------------------------------------------------------------------- Net Assets Class A $480,408,023 $375,031,477 $ 855,439,500 Class B 9,689,683 -- 9,689,683 Class C 43,279,821 14,188,415 57,468,236 Class R 8,602,193 -- 8,602,193 Class Y 33,367,844 92,797,966 126,165,810 Total Net Assets $575,347,564 $482,017,858 $1,057,365,422 Shares Outstanding Class A 14,033,389 10,956,195* 24,989,584 Class B 344,312 -- 344,312 Class C 1,500,584 491,969* 1,992,553 Class R 254,059 -- 254,059 Class Y 934,367 2,598,660* 3,533,027 ---------------------------------------------------------------------------------------------------- Pre-conversion Post-conversion Shares Conversion Ratio* Shares ---------------------------------------------------------------------------------------------------- Class A 18,313,828 0.5928 10,956,195 Class C 769,464 0.6394 491,969 Class Y 4,382,522 0.5930 2,598,660 * Share amounts have been adjusted to reflect the conversion ratios utilized to align the net asset values of the predecessor fund with those of the Fund. ---------------------------------------------------------------------------------------------------- Shares Issued In Exchange Ratio Reorganization** ---------------------------------------------------------------------------------------------------- Class A 1.000 14,033,389 Class B 1.000 344,312 Class C 1.000 1,500,584 Class R 1.000 254,059 Class Y 1.000 934,367 ** Reflects shares issued by the predecessor fund, the accounting survivor as shown on the Statement of Changes. ---------------------------------------------------------------------------------------------------- Unrealized Accumulated Appreciation Gain (Loss) on Closing Date on Closing Date ---------------------------------------------------------------------------------------------------- Predecessor Fund $117,287,618 $ 47,932,022 Fund 110,242,386 (30,439,766) Assuming the Reorganization had been completed on December 1, 2012, the beginning of the Fund's current fiscal period, the pro forma results of operations for the fiscal year ended November 30, 2013, are as follows: Net Investment income (loss) $ (6,405,202) Net realized and unrealized gains 345,088,972 -------------------------------------------------------------------------------- Change in net assets resulting from operations $338,683,770 ================================================================================ Pioneer Select Mid Cap Growth Fund | Semiannual Report | 5/31/14 47 Because the combined investment portfolios have been managed as a single integrated portfolio since the reorganization was completed, it is not practical to separate the amounts of revenue and earnings of the Fund that have been included in the Statements of Operations since the Reorganization was consummated. 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 Fund's independent registered public accounting firm for the fiscal year ending November 30, 2014. Deloitte & Touche LLP replaces Ernst & Young LLP, which resigned as the Fund's independent registered public accounting firm, effective upon completion of the audit of the Fund's financial statements for the fiscal year ended November 30, 2013. During the periods that Ernst & Young LLP served as the Fund's independent registered public accounting firm, including the Fund's two most recent fiscal years, 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. 48 Pioneer Select Mid Cap Growth Fund | Semiannual Report | 5/31/14 Trustees, Officers and Service Providers Trustees Officers Thomas J. Perna, Chairman Daniel K. Kingsbury, President* David R. Bock Mark D. Goodwin, Executive Benjamin M. Friedman Vice President Margaret B.W. Graham Mark E. Bradley, Treasurer** Daniel K. Kingsbury Christopher J. Kelley, Secretary Marc O. Mayer*** Marguerite A. Piret Kenneth J. Taubes Stephen K. West**** Investment Adviser and Administrator Pioneer Investment Management, Inc. Custodian and Sub-Administrator Brown Brothers Harriman & Co. Principal Underwriter Pioneer Funds Distributor, Inc. Legal Counsel Bingham McCutchen LLP Shareowner Services and Transfer Agent Pioneer Investment Management Shareholder Services, Inc. Proxy Voting Policies and Procedures of the Fund are available without charge, upon request, by calling our toll free number (1-800-225-6292). Information regarding how the Fund voted proxies relating to portfolio securities during the most recent 12-month period ended June 30 is publicly available to shareowners at us.pioneerinvestments.com. This information is also available on the Securities and Exchange Commission's web site at www.sec.gov. * Chief Executive Officer of the Fund. ** Chief Financial and Accounting Officer of the Fund. *** Mr. Mayer resigned as a Trustee of the Pioneer Funds effective May 6, 2014. **** Mr. West resigned as a Trustee of the Pioneer Funds effective July 15, 2014. Pioneer Select Mid Cap Growth Fund | Semiannual Report | 5/31/14 49 This page for your notes. 50 Pioneer Select Mid Cap Growth Fund | Semiannual Report | 5/31/14 This page for your notes. Pioneer Select Mid Cap Growth Fund | Semiannual Report | 5/31/14 51 This page for your notes. 52 Pioneer Select Mid Cap Growth Fund | Semiannual Report | 5/31/14 How to Contact Pioneer We are pleased to offer a variety of convenient ways for you to contact us for assistance or information. Call us for: -------------------------------------------------------------------------------- Account Information, including existing accounts, new accounts, prospectuses, applications and service forms 1-800-225-6292 FactFone(SM) for automated fund yields, prices, account information and transactions 1-800-225-4321 Retirement plans information 1-800-622-0176 Write to us: -------------------------------------------------------------------------------- PIMSS, Inc. P.O. Box 55014 Boston, Massachusetts 02205-5014 Our toll-free fax 1-800-225-4240 Our internet e-mail address ask.pioneer@pioneerinvestments.com (for general questions about Pioneer only) Visit our web site: us.pioneerinvestments.com This report must be preceded or accompanied by a prospectus. The Fund files a complete schedule of investments with the Securities and Exchange Commission for the first and third quarters for each fiscal year on Form N-Q. Shareholders may view the filed Form N-Q by visiting the Commission's web site at http://www.sec.gov. The filed form may also be viewed and copied at the Commission's Public Reference Room in Washington, DC. Information regarding the operations of the Public Reference Room may be obtained by calling 1-800-SEC-0330. [LOGO] PIONEER Investments(R) Pioneer Investment Management, Inc. 60 State Street Boston, MA 02109 us.pioneerinvestments.com Securities offered through Pioneer Funds Distributor, Inc. 60 State Street, Boston, MA 02109 Underwriter of Pioneer Mutual Funds, Member SIPC (C) 2014 Pioneer Investments 23253-05-0714 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. Not applicable. (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 Trustees has considered whether the provision of non-audit services that were rendered to the Affiliates (as defined) that were not pre- approved pursuant to paragraph (c)(7)(ii) of Rule 2-01 of Regulation S-X is compatible with maintaining the principal accountant's independence. ITEM 5. AUDIT COMMITTEE OF LISTED REGISTRANTS (a) If the registrant is a listed issuer as defined in Rule 10A-3 under the Exchange Act (17 CFR 240.10A-3), state whether or not the registrant has a separately-designated standing audit committee established in accordance with Section 3(a)(58)(A) of the Exchange Act (15 U.S.C. 78c(a)(58)(A)). If the registrant has such a committee, however designated, identify each committee member. If the entire board of directors is acting as the registrant's audit committee as specified in Section 3(a)(58)(B) of the Exchange Act (15 U.S.C. 78c(a)(58)(B)), so state. Not applicable. (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. Not applicable. 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 II By (Signature and Title)* /s/ Daniel K. Kingsbury Daniel K. Kingsbury, President Date July 29, 2014 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/ Daniel K. Kingsbury Daniel K. Kingsbury, President Date July 29, 2014 By (Signature and Title)* /s/ Mark Bradley Mark Bradley, Treasurer & Chief Accounting & Financial Officer Date July 29, 2014 * Print the name and title of each signing officer under his or her signature.