OMB APPROVAL OMB Number: 3235-0570 Expires: November 30, 2005 Estimated average burden hours per response..... 5.0 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 811-07525 Pioneer Mid Cap Growth Fund (Exact name of registrant as specified in charter) 60 State Street, Boston, MA 02109 (Address of principal executive offices) (ZIP code) Dorothy E. Bourassa, 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: September 30 Date of reporting period: October 1, 2003 through March 31, 2004 Form N-CSR is to be used by management investment companies to file reports with the Commission not later than 10 days after the transmission to stockholders of any report that is required to be transmitted to stockholders under Rule 30e-1 under the Investment Company Act of 1940 (17 CFR 270.30e-1). The Commission may use the information provided on Form N-CSR in its regulatory, disclosure review, inspection, and policymaking roles. A registrant is required to disclose the information specified by Form N-CSR, and the Commission will make this information public. A registrant is not required to respond to the collection of information contained in Form N-CSR unless the Form displays a currently valid Office of Management and Budget ("OMB") control number. Please direct comments concerning the accuracy of the information collection burden estimate and any suggestions for reducing the burden to Secretary, Securities and Exchange Commission, 450 Fifth Street, NW, Washington, DC 20549-0609. The OMB has reviewed this collection of information under the clearance requirements of 44 U.S.C. ss. 3507. ITEM 1. REPORTS TO SHAREOWNERS. PIONEER ------- MID CAP GROWTH FUND Semiannual Report 3/31/04 [LOGO] PIONEER Investments(R) Table of Contents - -------------------------------------------------------------------------------- Letter to Shareowners 1 Portfolio Summary 2 Performance Update 3 Portfolio Management Discussion 6 Schedule of Investments 9 Financial Statements 17 Notes to Financial Statements 23 Trustees, Officers and Service Providers 30 The Pioneer Family of Mutual Funds 31 Programs and Services for Pioneer Shareowners 32 Retirement Plans from Pioneer 34 Pioneer Mid Cap Growth Fund - -------------------------------------------------------------------------------- LETTER TO SHAREOWNERS 3/31/04 - -------------------------------------------------------------------------------- Dear Shareowners, - -------------------------------------------------------------------------------- Last year's stock market rally carried over into early 2004 but ran out of steam as investors reassessed the dramatic rise in stock valuations. The technology-rich NASDAQ Composite Index, having risen the fastest, was the first to feel pressure; the Dow Jones Industrial Average and Standard & Poor's 500 soon gave up some gains as well. By the end of March, these major indicators were little changed from year-end levels but well ahead of where they stood a year ago. In general terms, smaller companies outperformed large, and emerging markets outpaced developed countries, as both benefited from weakness in the U.S. dollar. Corporate bonds, here and overseas, recorded strong gains. U.S. Treasury issues also performed well, as the Federal Reserve Board signaled that it was in no hurry to raise interest rates, given the mixed economic data it was seeing. Those mixed economic reports were also responsible for the stock market's sluggishness. While corporate profits expanded at a healthy rate, unemployment remained high and consumer confidence dropped sharply in February. Increased productivity, a company's ability to produce more goods or services for each hour worked, was a major factor in the disappointing pace of job creation. However, jobs data improved markedly in March when the government reported U.S. employers had added over 300,000 jobs, the largest figure in years; at the same time, January and February numbers were revised upward. Payroll expansion reached into most sectors, while employment held steady in manufacturing after a long period of declines. The markets reacted positively to the jobs report. We believe that renewed hiring means companies are optimistic about the outlook for profits in the months ahead. In fact, many businesses are building up inventories in expectation of increased product demand. The key drivers of the expansion, low interest rates and reduced federal income taxes, remain in place. Consequently, we think the U.S. economy retains impressive growth potential through the rest of this year. An expanding economy could have implications for the way your portfolio is balanced, so an appointment with your professional financial advisor may well be in order. More growth choices from Pioneer When you talk to your advisor, ask to hear about the Pioneer Oak Ridge and Pioneer Papp Funds. These six additions to our product lineup are designed to broaden your opportunities to pursue growth. Please consider each fund's investment objectives, risks, charges and expenses carefully before investing. The prospectus contains this and other information about each fund and should be read carefully before you invest or send money. To obtain a prospectus and for other information on any Pioneer fund, contact your financial advisor, call 1-800-225-6292 or visit our website at www.pioneerfunds.com. Respectfully, /s/ Osbert M. Hood Osbert M. Hood, President Pioneer Investment Management, 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 the opinion of Fund management 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. 1 Pioneer Mid Cap Growth Fund - -------------------------------------------------------------------------------- PORTFOLIO SUMMARY 3/31/04 - -------------------------------------------------------------------------------- Portfolio Diversification - -------------------------------------------------------------------------------- (As a percentage of total investment portfolio) [The following table was depicted as a pie chart in the printed material.] U.S. Common Stocks 98.2% Temporary Cash Investment 1.4% Depositary Receipts for International Stocks 0.4% Sector Distribution - -------------------------------------------------------------------------------- (As a percentage of equity holdings) [The following table was depicted as a pie chart in the printed material.] Information Technology 35.5% Consumer Discretionary 18.1% Health Care 16.7% Industrials 10.9% Financials 7.1% Materials 5.2% Energy 5.1% Consumer Staples 1.4% 10 Largest Holdings - -------------------------------------------------------------------------------- (As a percentage of total investment in securities)* 1. Corinthian Colleges, Inc. 2.56% 6. International Game Technology 1.70% 2. Lexar Media, Inc. 2.18% 7. American Standard Companies, Inc. 1.65% 3. Zimmer Holdings, Inc. 1.96% 8. Phelps Dodge Corp. 1.64% 4. St. Jude Medical, Inc. 1.92% 9. GTECH Holdings Corp. 1.60% 5. Analog Devices, Inc. 1.71% 10. Utstarcom, Inc. 1.60% *This list excludes money market and derivative instruments. Portfolio holdings will vary for other periods. 2 Pioneer Mid Cap Growth Fund - -------------------------------------------------------------------------------- PERFORMANCE UPDATE 3/31/04 CLASS A SHARES - -------------------------------------------------------------------------------- Share Prices and Distributions - -------------------------------------------------------------------------------- Net Asset Value per Share 3/31/04 9/30/03 $14.65 $12.68 Net Distributions per Share Investment Short-Term Long-Term (10/01/03 - 3/31/04) Income Capital Gains Capital Gains $ - $ - $ - Investment Returns - -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $10,000 investment made in Pioneer Mid Cap Growth Fund at public offering price, compared to that of the Russell Midcap Growth Index. - ----------------------------------------- Average Annual Total Returns (As of March 31, 2004) Net Asset Public Offering Period Value Price* 10 Years 5.64% 5.02% 5 Years 2.58 1.37 1 Year 44.33 36.03 - ----------------------------------------- All returns reflect investment of distributions at net asset value. * Reflects deduction of the maximum 5.75% sales charge at the beginning of the period. [The following table was depicted as a mountain chart in the printed material.] Pioneer Mid Cap Russell Midcap Growth Fund* Growth Index 3/94 9425 10000 9/94 9413 10240 10941 13278 9/96 11883 15447 14421 20026 9/98 12128 18148 14443 24900 9/00 21654 39931 12937 19260 9/02 10753 16275 14129 22603 3/04 16324 26577 The Fund adopted its current investment objective on February 1, 1996. Prior to that date, the Fund's objective was growth and income from a portfolio primarily of small-capitalization stocks. The Russell Midcap Growth Index measures the performance of those companies in the Russell Midcap Index with higher price-to-book ratios and higher forecasted growth values. Index returns are calculated monthly, assume reinvestment of dividends and, unlike Fund returns, do not reflect any fees, expenses or sales charges. You cannot invest directly in the Index. Performance data shown represents past performance. Past performance does not guarantee future results. Assumes reinvestment of all distributions at net asset value. Investment return and principal value fluctuate, and shares, when redeemed, may be worth more or less than their original cost. Current performance may be lower or higher than the performance shown. For performance data that is current to the most recent month-end, please call 1-800-225-6292 or visit our website www.pioneerfunds.com. 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. 3 Pioneer Mid Cap Growth Fund - -------------------------------------------------------------------------------- PERFORMANCE UPDATE 3/31/04 CLASS B SHARES - -------------------------------------------------------------------------------- Share Prices and Distributions - -------------------------------------------------------------------------------- Net Asset Value per Share 3/31/04 9/30/03 $12.91 $11.24 Net Distributions per Share Investment Short-Term Long-Term (10/01/03 - 3/31/04) Income Capital Gains Capital Gains $ - $ - $ - Investment Returns - -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $10,000 investment made in Pioneer Mid Cap Growth Fund, compared to that of the Russell Midcap Growth Index. - ----------------------------------------- Average Annual Total Returns (As of March 31, 2004) If If Period Held Redeemed* Life-of-Class (2/1/96) 4.00% 4.00% 5 Years 1.31 1.17 1 Year 38.49 42.49 - ----------------------------------------- All returns reflect reinvestment of distributions at net asset value. * Reflects deduction of the maximum applicable contingent deferred sales charge (CDSC) at the end of the period. The maximum CDSC of 4% declines to zero over six years. [The following table was depicted as a mountain chart in the printed material.] Pioneer Mid Cap Russell Midcap Growth Fund* Growth Index 2/96 10000 10000 9/96 10765 10812 12904 14017 9/98 10728 12702 12634 17428 9/00 18763 27949 11055 13481 9/02 9049 11391 11745 15820 3/04 13490 18602 + Index comparison begins 2/29/96. The Russell Midcap Growth Index measures the performance of those companies in the Russell Midcap Index with higher price-to-book ratios and higher forecasted growth values. Index returns are calculated monthly, assume reinvestment of dividends and, unlike Fund returns, do not reflect any fees, expenses or sales charges. You cannot invest directly in the Index. Performance data shown represents past performance. Past performance does not guarantee future results. Assumes reinvestment of all distributions at net asset value. Investment return and principal value fluctuate, and shares, when redeemed, may be worth more or less than their original cost. Current performance may be lower or higher than the performance shown. For performance data that is current to the most recent month-end, please call 1-800-225-6292 or visit our website www.pioneerfunds.com. 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. 4 Pioneer Mid Cap Growth Fund - -------------------------------------------------------------------------------- PERFORMANCE UPDATE 3/31/04 CLASS C SHARES - -------------------------------------------------------------------------------- Share Prices and Distributions - -------------------------------------------------------------------------------- Net Asset Value per Share 3/31/04 9/30/03 $13.34 $11.60 Net Distributions per Share Investment Short-Term Long-Term (10/01/03 - 3/31/04) Income Capital Gains Capital Gains $ - $ - $ - Investment Returns - -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $10,000 investment made in Pioneer Mid Cap Growth Fund at public offering price, compared to that of the Russell Midcap Growth Index. - ----------------------------------------- Average Annual Total Returns (As of March 31, 2004) If If Period Held Redeemed Life-of-Class (2/1/96) 4.19% 4.19% 5 Years 1.29 1.29 1 Year 42.52 42.52 - ----------------------------------------- All returns reflect reinvestment of distributions at net asset value. The performance of Class C shares does not reflect the 1% front-end sales charge in effect prior to February 1, 2004. If you paid a 1% sales charge, your returns would be lower than shown above. Class C shares held for less than one year are subject to a 1% contingent deferred sales charge (CDSC). [The following table was depicted as a mountain chart in the printed material.] Pioneer Mid Cap Russell Midcap Growth Fund* Growth Index 2/96 10000 10000 9/96 10765 10812 13069 14017 9/98 10877 12702 12848 17428 9/00 19093 27949 11252 13481 9/02 9199 11391 11909 15820 3/04 13696 18602 + Index comparison begins 2/29/96. The Russell Midcap Growth Index measures the performance of those companies in the Russell Midcap Index with higher price-to-book ratios and higher forecasted growth values. Index returns are calculated monthly, assume reinvestment of dividends and, unlike Fund returns, do not reflect any fees, expenses or sales charges. You cannot invest directly in the Index. Performance data shown represents past performance. Past performance does not guarantee future results. Assumes reinvestment of all distributions at net asset value. Investment return and principal value fluctuate, and shares, when redeemed, may be worth more or less than their original cost. Current performance may be lower or higher than the performance shown. For performance data that is current to the most recent month-end, please call 1-800-225-6292 or visit our website www.pioneerfunds.com. 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. 5 Pioneer Mid Cap Growth Fund - -------------------------------------------------------------------------------- PORTFOLIO MANAGEMENT DISCUSSION 3/31/04 - -------------------------------------------------------------------------------- Pioneer Mid Cap Growth Fund continued to deliver solid returns as the expanding U.S. economy drove equity markets higher over the last six months. In the following discussion, portfolio manager Eric Weigel explains his strategies and details the decisions that affected the Fund's results. Q: Please tell us about conditions in the market over the last six months. A: Mid-cap growth stocks performed well in September and October, but investors grew decidedly less aggressive and took profits in December. Stocks that had risen most sharply over the course of the year were among the steepest decliners. No clear trend was apparent in the first quarter of 2004, with stocks generally rising in the early weeks of the year, then slumping in February and March. Q: How did the Fund perform against that shifting background? A: Pioneer Mid Cap Growth Fund's Class A, B and C shares had total returns of 15.54%, 14.86% and 15.00%, respectively, at net asset value, for the six months ended March 31, 2004. The Russell Midcap Growth Index, the Fund's benchmark, had a return of 17.58% for the same period. Q: What strategies did you pursue, and how did they affect results? A: By September of last year we had positioned the portfolio aggressively in an effort to take advantage of growth opportunities in the resurgent U.S. economy. That stance paid off early in the period, but a number of our better performers declined during the December sell off despite continuing strong fundamentals and attractive prospects. Our aggressive positioning explains in large part why the Fund trailed its benchmark index. Q: What were some sectors and stocks that aided or hurt results? A: Gaming companies are an example of consumer discretionary stocks that can do well in a strengthening economy. Caesars Entertainment, a hotel and casino operator, was a direct beneficiary of expanding travel volumes as well as its own corporate restructuring. GTECH Holdings, which provides on-line lottery systems, and International Gaming Technology, a maker of computerized gaming machines, also lifted results. 6 Pioneer Mid Cap Growth Fund - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- Being underweight in health care stocks was a negative, and security selection in this sector was not optimal. Nevertheless, our fairly significant exposure to makers of orthopedic devices benefited returns. Both Zimmer Holdings, the Fund's third largest position on March 31, and Biomet are leaders in this growing market, which includes joint replacement products and other surgical materials. St. Jude Medical continued to enjoy steady growth in sales of its stents and other cardiovascular products. Shares of drugmaker Sepracor surged when the FDA issued tentative approval of Estorra, a new sleep-aid formulation. But we sold our large position in Canadian specialty drugmaker Biovail after questions arose about the quality and stability of its earnings as well as the capabilities of its management. Cubist Pharmaceuticals, which focuses on drugs designed to meet serious infections and other unmet medical needs, declined slightly. Our overweight stance in information technology relative to the benchmark detracted from comparative returns as other sectors performed better. Stock selection in technology was also unfavorable. SanDisk, a semiconductor manufacturer, was down significantly in December. We continue to hold these shares because we think they are now reasonably valued in light of the company's improving fundamentals. Intersil, another semiconductor company, fell despite improving fundamentals when it announced an acquisition; the market tends to penalize acquirers. Intersil's business is improving and we continue to view its outlook favorably. Conversely, we were underweight in telecommunications services, a sector that performed well. On the positive side, AT&T Wireless rose sharply on news of its proposed acquisition by Cingular. Verint Systems, makers of software that aggregates and analyzes security data gathered by cameras and other devices, enjoyed a solid gain. Q: What other areas had an impact on performance? A: Two mining companies, Phelps Dodge and Freeport-McMoRan Copper & Gold rode higher copper prices driven by incremental demand from China, as it works to develop its communications and electric networks. Both issues retreated this year after very sharp gains. In energy, our overexposure to energy stocks made a modest contribution to results, but this sector is a relatively small 7 Pioneer Mid Cap Growth Fund - -------------------------------------------------------------------------------- PORTFOLIO MANAGEMENT DISCUSSION 3/31/04 (continued) - -------------------------------------------------------------------------------- part of the portfolio. We have begun trimming back even this small exposure in the belief that high oil prices are not sustainable and will eventually come down. Corinthian Colleges and Career Education Alternative boosted performance, following their recent addition to the portfolio. Both companies offer career education alternatives in the form of on-line, post-secondary training programs. The emphasis is on expanding and refreshing skills for blue-collar workers, technicians and health care specialties. Target customers include young people, as well as laid-off older workers looking to retool their skills for local jobs that are not subject to outsourcing. Q: What is your outlook for the economy, and how have you positioned the Fund? A: We remain bullish on the prospects for continued economic growth and are cautiously optimistic for stocks. Should the expansion begin to accelerate and generate inflationary concerns, the Federal Reserve Board may feel compelled to raise interest rates; low rates have been one the chief factors sustaining the current expansion. In this scenario, we believe our posture of being underweight (relative to the Fund's benchmark) in consumer discretionary stocks is appropriate, as higher rates might cut into consumer spending. We also favor heavier exposure to technology despite the extra volatility that it brings. Technology companies are not interest rate sensitive. In addition, we think the revitalization of tech spending by corporations is still in its early stages. Many companies that have postponed investing in technology for years may now feel competitive pressure to spend and upgrade. 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 the opinion of Fund management 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. 8 Pioneer Mid Cap Growth Fund - -------------------------------------------------------------------------------- SCHEDULE OF INVESTMENTS 3/31/04 (unaudited) - -------------------------------------------------------------------------------- Shares Value COMMON STOCKS - 98.9% Energy - 4.9% Oil & Gas Drilling - 3.4% 90,100 BJ Services Co.* $ 3,898,627 211,400 Patterson Energy, Inc.* 7,485,674 167,600 Varco International, Inc.* 3,018,475 187,500 Weatherford International, Inc.* 7,880,625 ------------ $ 22,283,401 ------------ Oil & Gas Exploration & Production - 1.5% 196,100 Pioneer Natural Resources Co. $ 6,334,030 122,700 Suncor Energy, Inc. 3,355,845 ------------ 9,689,875 ------------ Total Energy $ 31,973,276 ------------ Materials - 5.2% Commodity Chemicals - 0.6% 95,000 Praxair Inc. $ 3,526,400 ------------ Diversified Metals & Mining - 2.9% 201,400 Freeport-McMoRan Copper & Gold, Inc. (Class B) $ 7,872,726 127,400 Phelps Dodge Corp.* 10,403,484 ------------ $ 18,276,210 ------------ Metal & Glass Containers - 0.9% 83,000 Ball Corp. $ 5,625,740 ------------ Precious Metals & Minerals - 0.3% 46,600 Newmont Mining Corp. $ 2,172,958 ------------ Specialty Chemicals - 0.5% 69,000 Valspar Corp. $ 3,396,870 ------------ Total Materials $ 32,998,178 ------------ Capital Goods - 3.9% Industrial Conglomerates - 2.6% 91,500 American Standard Companies, Inc.* $ 10,408,125 83,300 ITT Industries, Inc. 6,358,289 ------------ $ 16,766,414 ------------ Industrial Machinery - 1.3% 182,300 SPX Corp. $ 8,291,004 ------------ Total Capital Goods $ 25,057,418 ------------ The accompanying notes are an integral part of these financial statements. 9 Pioneer Mid Cap Growth Fund - -------------------------------------------------------------------------------- SCHEDULE OF INVESTMENTS 3/31/04 (unaudited) (continued) - -------------------------------------------------------------------------------- Shares Value Commercial Services & Supplies - 5.9% Diversified Commercial Services - 1.9% 67,879 Apollo Group, Inc.* $ 5,845,061 519,100 Exult, Inc.* 3,233,993 62,600 H & R Block, Inc. 3,194,478 ------------ $ 12,273,532 ------------ Employment Services - 4.0% 165,900 Career Education Corp.* $ 9,396,576 490,600 Corinthian Colleges, Inc.* 16,219,236 ------------ $ 25,615,812 ------------ Total Commercial Services & Supplies $ 37,889,344 ------------ Transportation - 1.0% Railroads - 1.0% 156,150 Canadian National Railway Co. $ 6,141,380 ------------ Total Transportation $ 6,141,380 ------------ Automobiles & Components - 0.4% Auto Parts & Equipment - 0.4% 31,600 Borg-Warner Automotive, Inc. $ 2,680,628 ------------ Total Automobiles & Components $ 2,680,628 ------------ Consumer Durables & Apparel - 2.1% Apparel, Accessories & Luxury Goods - 1.0% 255,100 TJX Companies, Inc. $ 6,265,256 ------------ Leisure Products - 1.1% 392,200 Mattel, Inc. $ 7,232,168 ------------ Total Consumer Durables & Apparel $ 13,497,424 ------------ Hotels, Restaurants & Leisure - 9.4% Casinos & Gaming - 5.8% 674,800 Caesars Entertainment, Inc.* $ 8,799,392 171,200 GTECH Holdings Corp. 10,124,768 141,300 Harrah's Entertainment, Inc. 7,755,957 238,600 International Game Technology 10,727,456 ------------ $ 37,407,573 ------------ 10 The accompanying notes are an integral part of these financial statements. Pioneer Mid Cap Growth Fund - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- Shares Value Restaurants - 3.6% 229,100 Brinker International, Inc.* $ 8,689,763 218,300 Starbucks Corp.* 8,240,825 154,400 Tricon Global Restaurants, Inc.* 5,865,656 ------------ $ 22,796,244 ------------ Total Hotels, Restaurants & Leisure $ 60,203,817 ------------ Retailing - 5.9% Apparel Retail - 2.0% 146,500 Jones Apparel Group, Inc.* $ 5,295,974 53,700 Liz Claiborne, Inc. 1,970,253 117,200 Ross Stores, Inc. 3,587,492 124,100 Tommy Hilfiger Corp.* 2,109,700 ------------ $ 12,963,419 ------------ Computer & Electronics Retail - 0.9% 106,500 Gamestop Corp.* $ 1,919,130 113,200 Radioshack Corp. 3,753,712 ------------ $ 5,672,842 ------------ Department Stores - 0.9% 170,200 J.C. Penney Co., Inc. $ 5,919,556 ------------ General Merchandise Stores - 0.3% 56,400 Family Dollar Stores, Inc. $ 2,027,580 ------------ Internet Retail - 0.4% 98,750 Orbitz Inc.* $ 2,351,238 ------------ Specialty Stores - 1.4% 76,900 Bed Bath & Beyond, Inc.* $ 3,211,344 225,800 Staples, Inc.* 5,733,062 ------------ $ 8,944,406 ------------ Total Retailing $ 37,879,041 ------------ Food & Drug Retailing - 1.5% Food Distributors - 0.4% 76,200 Supervalue, Inc. $ 2,327,148 ------------ Food Retail - 1.1% 211,300 McCormick & Co, Inc. $ 7,082,776 ------------ Total Food & Drug Retailing $ 9,409,924 ------------ The accompanying notes are an integral part of these financial statements. 11 Pioneer Mid Cap Growth Fund - -------------------------------------------------------------------------------- SCHEDULE OF INVESTMENTS 3/31/04 (unaudited) (continued) - -------------------------------------------------------------------------------- Shares Value Health Care Equipment & Services - 11.4% Health Care Distributors - 1.9% 110,400 Allergan, Inc. $ 9,291,264 39,700 Teva Pharmaceutical Industries Ltd. (A.D.R.) 2,517,377 ------------ $ 11,808,641 ------------ Health Care Equipment - 5.9% 194,520 Biomet, Inc. $ 7,461,787 40,100 Guidant Corp. 2,541,137 168,500 St. Jude Medical, Inc.* 12,148,850 37,200 Stryker Corp. 3,293,316 167,800 Zimmer Holdings, Inc.* 12,380,284 ------------ $ 37,825,374 ------------ Health Care Equipment & Services - 0.4% 307,700 WebMD Corp.* $ 2,735,453 ------------ Health Care Facilities - 1.0% 79,000 DaVita, Inc.* $ 3,772,250 120,100 Health Management Associates, Inc. 2,787,521 ------------ $ 6,559,771 ------------ Health Care Services - 1.2% 34,500 Express Scripts, Inc.* $ 2,573,355 61,000 Quest Diagnostics, Inc. 5,052,630 ------------ $ 7,625,985 ------------ Health Care Supplies - 0.4% 53,000 Charles River Laboratories International, Inc.* $ 2,271,050 ------------ Managed Health Care - 0.6% 34,200 Wellpoint Health Networks Inc.* $ 3,889,224 ------------ Total Health Care Equipment & Services $ 72,715,498 ------------ Pharmaceuticals & Biotechnology - 5.1% Biotechnology - 2.8% 81,705 Biogen, Inc.* $ 4,542,798 80,800 Celgene Corp.* 3,850,120 70,100 Chiron Corp.* 3,085,101 474,900 Cubist Pharmaceuticals, Inc.* 4,369,080 35,200 Gilead Sciences, Inc.* 1,963,104 ------------ $ 17,810,203 ------------ 12 The accompanying notes are an integral part of these financial statements. Pioneer Mid Cap Growth Fund - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- Shares Value Pharmaceuticals - 2.3% 76,200 Barr Laboratorie, Inc.* $ 3,497,580 130,150 IVAX Corp.* 2,963,516 85,650 Mylan Laboratories, Inc. 1,946,825 75,000 Sepracor, Inc.* 3,607,500 66,100 Watson Pharmaceuticals, Inc.* 2,828,419 ------------ $ 14,843,840 ------------ Total Pharmaceuticals & Biotechnology $ 32,654,043 ------------ Banks - 1.8% Diversified Banks - 0.4% 72,200 Charter One Financial, Inc. $ 2,552,992 ------------ Regional Banks - 0.9% 93,200 North Fork Bancorporation, Inc. $ 3,944,224 39,600 TCF Financial Corp. 2,022,372 ------------ $ 5,966,596 ------------ Thrifts & Mortgage Finance - 0.5% 81,900 The PMI Group, Inc. $ 3,059,784 ------------ Total Banks $ 11,579,372 ------------ Diversified Financials - 3.6% Asset Management & Custody Banks - 1.2% 83,900 Legg Mason Inc. $ 7,784,242 ------------ Consumer Finance - 1.4% 512,700 Providian Financial Corp.* $ 6,716,370 50,900 SLM Corp. 2,130,165 ------------ $ 8,846,535 ------------ Specialized Finance - 1.0% 85,900 Moody's Corp. $ 6,081,720 ------------ Total Diversified Financials $ 22,712,497 ------------ Insurance - 1.7% Insurance Brokers - 1.4% 141,500 Platinum Underwriter Holdings Ltd. $ 4,535,075 109,500 Willis Group Holdings Ltd. 4,073,400 ------------ $ 8,608,475 ------------ Property & Casualty Insurance - 0.3% 31,175 MBIA, Inc. $ 1,954,673 ------------ Total Insurance $ 10,563,148 ------------ The accompanying notes are an integral part of these financial statements. 13 Pioneer Mid Cap Growth Fund - -------------------------------------------------------------------------------- SCHEDULE OF INVESTMENTS 3/31/04 (unaudited) (continued) - -------------------------------------------------------------------------------- Shares Value Software & Services - 12.1% Application Software - 7.4% 119,500 Adobe Systems, Inc. $ 4,711,885 202,200 Cadence Design System, Inc.* 2,980,428 5,000 Callidus Software, Inc.* 42,550 142,100 Check Point Software Technologies Ltd.* 3,235,617 111,393 Intuit, Inc.* 4,999,318 173,600 Macrovision Corp.* 3,242,848 144,800 Mercury Computer Systems, Inc.* 3,692,400 155,500 Symantec Corp.* 7,199,650 175,200 Synopsys, Inc.* 5,073,792 307,000 Verint Systems, Inc.* 9,486,300 176,200 VeriSign, Inc.* 2,923,158 ------------ $ 47,587,946 ------------ Data Processing & Outsourced Services - 1.0% 117,900 Affiliated Computer Services, Inc.* $ 6,119,010 ------------ Home Entertainment Software - 1.6% 118,500 Electronic Arts, Inc.* $ 6,394,260 101,632 Take-Two Interactive Software, Inc.* 3,738,025 ------------ $ 10,132,285 ------------ Internet Software & Services - 0.0% 2,500 Open Solutions, Inc.* $ 55,200 ------------ IT Consulting & Other Services - 1.0% 147,049 Cognizant Technology Solutions Corp.* $ 6,653,967 ------------ Systems Software - 1.1% 502,900 Netiq Corp.* $ 7,020,484 ------------ Total Software & Services $ 77,568,892 ------------ Technology Hardware & Equipment - 11.3% Networking Equipment - 1.9% 253,100 BEA Systems, Inc.* $ 3,229,556 453,800 Brocade Communications Systems, Inc.* 3,022,308 171,600 Network Appliance Inc.* 3,680,820 98,000 Radware Ltd.* 2,602,880 ------------ $ 12,535,564 ------------ Communications Equipment - 2.3% 161,200 Ciena Corp.* $ 801,164 63,700 L-3 Communications Holdings, Inc. 3,788,876 351,500 Utstarcom, Inc.* 10,109,140 ------------ $ 14,699,180 ------------ 14 The accompanying notes are an integral part of these financial statements. Pioneer Mid Cap Growth Fund - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- Shares Value Computer Storage & Peripherals - 5.3% 833,100 Lexar Media, Inc.* $ 13,796,136 76,400 Lexmark International Group, Inc.* 7,028,800 694,700 Quantum Corp. - DLT & Storage Systems* 2,570,390 271,100 SanDisk Corp.* 7,691,107 94,500 Storage Technology Corp.* 2,629,935 ------------ $ 33,716,368 ------------ Electronic Equipment & Instruments - 1.2% 118,400 Flextronics International, Ltd.* $ 2,038,848 137,300 Waters Corp.* 5,607,332 ------------ $ 7,646,180 ------------ Technology Distributors - 0.6% 91,400 Technology Data Corp.* $ 3,741,916 ------------ Total Technology Hardware & Equipment $ 72,339,208 ------------ Semiconductors - 11.7% Semiconductor Equipment - 2.5% 93,000 Brooks Automation, Inc.* $ 1,951,140 51,500 Cymer, Inc.* 1,988,415 107,100 KLA-Tencor Corp.* 5,392,485 144,700 Lam Research Corp.* 3,647,887 91,100 Novellus Systems, Inc.* 2,896,069 ------------ $ 15,875,996 ------------ Semiconductors - 9.2% 238,300 Altera Corp.* $ 4,873,235 225,600 Analog Devices, Inc. 10,831,056 477,200 Applied Micro Circuits Corp.* 2,743,900 600,200 ATI Technologies, Inc.* 9,783,260 246,200 Cypress Semiconductor Corp.* 5,039,714 325,700 Intersil Holding Corp. 7,259,853 136,600 Microchip Technology 3,628,096 232,100 Micron Technology, Inc.* 3,878,391 234,000 Skyworks Solutions, Inc.* 2,728,440 465,100 Zoran Corp.* 8,074,136 ------------ $ 58,840,081 ------------ Total Semiconductors $ 74,716,077 ------------ TOTAL COMMON STOCKS (Cost $498,624,252) $632,579,165 ------------ The accompanying notes are an integral part of these financial statements. 15 Pioneer Mid Cap Growth Fund - -------------------------------------------------------------------------------- SCHEDULE OF INVESTMENTS 3/31/04 (unaudited) (continued) - -------------------------------------------------------------------------------- Principal Amount Value TEMPORARY CASH INVESTMENT - 1.4% Repurchase Agreement - 1.4% $8,900,000 UBS, Inc., 0.97%, dated 3/31/04, repurchase price of $8,900,000 plus accrued interest on 4/1/04 collateralized by $9,044,000 U.S. Treasury Bond, 1.625%, 3/31/05 $ 8,900,000 ------------ TOTAL TEMPORARY CASH INVESTMENT (Cost $8,900,000) $ 8,900,000 ------------ TOTAL INVESTMENT IN SECURITIES - 100.3% (Cost $507,524,252) (a)(b)(c) $641,479,165 ------------ OTHER ASSETS AND LIABILITIES - (0.3)% $ (1,796,864) ------------ TOTAL NET ASSETS - 100.0% $639,682,301 ============ * Non-income producing security. (A.D.R.) American Depository Receipt (a) At March 31, 2004, the net unrealized gain on investments based on cost for federal income tax purposes of $507,524,252 was as follows: Aggregate gross unrealized gain for all investments in which there is an excess of value over tax cost $140,555,499 Aggregate gross unrealized loss for all investments in which there is an excess of tax cost over value (6,600,586) ------------ Net unrealized gain $133,954,913 ============ (b) At September 30, 2003, the Fund had a net capital loss carryforward of $136,940,380 of which the following amounts will expire between 2009 and 2011, if not utilized. $2,193,301 in 2009 $26,831,229 in 2010 $107,915,850 in 2011 (c) The Fund elected to defer approximately $20,780,414 of capital losses recognized between November 1, 2002 and September 30, 2003 to its fiscal year ending September 30, 2004. Purchases and sales of securities (excluding temporary cash investments) for the six months ended March 31, 2004 aggregated $332,344,229 and $328,392,919, respectively. 16 The accompanying notes are an integral part of these financial statements. Pioneer Mid Cap Growth Fund - -------------------------------------------------------------------------------- STATEMENT OF ASSETS AND LIABILITIES 3/31/04 (unaudited) - -------------------------------------------------------------------------------- ASSETS: Investment in securities, at value (Cost $507,524,252) $641,479,165 Cash 28,517 Receivables - Investment securities sold 3,662,397 Fund shares sold 334,476 Dividends and interest 171,914 Other 20,193 ------------ Total assets $645,696,662 ------------ LIABILITIES: Payables - Investment securities purchased $ 4,674,222 Fund shares repurchased 582,658 Due to affiliates 646,080 Accrued expenses 111,401 ------------ Total liabilities $ 6,014,361 ------------ NET ASSETS: Paid-in capital $613,775,162 Accumulated net investment loss (1,562,797) Accumulated net realized loss on investments and futures contracts (106,484,977) Net unrealized gain on investments 133,954,913 ------------ Total net assets $639,682,301 ============ NET ASSET VALUE PER SHARE: (No par value, unlimited number of shares authorized) Class A (based on $581,979,172/39,726,244 shares) $ 14.65 ============ Class B (based on $36,045,921/2,793,138 shares) $ 12.91 ============ Class C (based on $21,657,208/1,623,948 shares) $ 13.34 ============ MAXIMUM OFFERING PRICE: Class A (14.65 [divided by] 94.25%) $ 15.54 ============ Class C (13.34 [divided by] 99.00%) $ 13.47 ============ The accompanying notes are an integral part of these financial statements. 17 Pioneer Mid Cap Growth Fund - -------------------------------------------------------------------------------- STATEMENT OF OPERATIONS (unaudited) - -------------------------------------------------------------------------------- For the Six Months Ended 3/31/04 INVESTMENT INCOME: Dividends (net of foreign taxes withheld of $7,820) $ 1,433,214 Interest 111,414 ----------- Total investment income $ 1,544,628 ----------- EXPENSES: Management fees Basic Fee $ 1,949,091 Performance Adjustment (611,399) Transfer agent fees Class A 575,014 Class B 114,068 Class C 38,485 Distribution fees Class A 624,845 Class B 176,387 Class C 103,481 Administrative fees 73,586 Custodian fees 23,734 Professional fees 22,121 Registration fees 62,183 Fees and expenses of nonaffiliated trustees 4,479 Miscellaneous 7,439 ----------- Total expenses $ 3,163,514 ----------- Less fees paid indirectly (4,333) Less other credits - Printing (51,756) ----------- Net expenses $ 3,107,425 ----------- Net investment loss $(1,562,797) ----------- REALIZED AND UNREALIZED GAIN ON INVESTMENTS AND FUTURES CONTRACTS: Net realized gain on: Investments $49,821,594 Futures contracts 919,245 $50,740,839 ----------- ----------- Change in net unrealized gain on: Investments $37,828,471 Futures contracts 847,229 $38,675,700 ----------- ----------- Net gain on investments and futures contracts $89,416,539 ----------- Net increase in net assets resulting from operations $87,853,742 =========== 18 The accompanying notes are an integral part of these financial statements. Pioneer Mid Cap Growth Fund - -------------------------------------------------------------------------------- STATEMENTS OF CHANGES IN NET ASSETS (unaudited) - -------------------------------------------------------------------------------- For the Six Months Ended 3/31/04 and the Year Ended 9/30/03 Six Months Ended 3/31/04 Year Ended (unaudited) 9/30/03 FROM OPERATIONS: Net investment loss $ (1,562,797) $ (2,687,209) Net realized gain (loss) on investments and futures contracts 50,740,839 (41,491,540) Change in net unrealized gain on investments and futures contracts 38,675,700 178,652,462 ------------- -------------- Net increase in net assets resulting from operations $ 87,853,742 $ 134,473,713 ------------- -------------- FROM FUND SHARE TRANSACTIONS: Net proceeds from sale of shares $ 30,976,904 $ 120,986,421 Cost of shares repurchased (50,963,590) (136,990,163) ------------- -------------- Net decrease in net assets resulting from Fund share transactions $ (19,986,686) $ (16,003,742) ------------- -------------- Net increase in net assets $ 67,867,056 $ 118,469,971 NET ASSETS: Beginning of period $ 571,815,245 $ 453,345,274 ------------- -------------- End of period (including accumulated net investment loss of ($1,562,797) and $0, respectively) $ 639,682,301 $ 571,815,245 ============= ============== '04 Shares '04 Amount '03 Shares '03 Amount (unaudited) (unaudited) CLASS A Shares sold 1,349,576 $ 18,921,737 7,898,793 $ 84,222,738 Less shares repurchased (2,812,890) (39,543,665) (10,724,595) (112,836,129) ---------- ------------- ----------- -------------- Net decrease (1,463,314) $ (20,621,928) (2,825,802) $ (28,613,391) ========== ============= =========== ============== CLASS B Shares sold 619,148 $ 7,586,085 1,380,824 $ 14,042,945 Less shares repurchased (619,068) (7,680,222) (1,008,122) (9,967,891) ---------- ------------- ----------- -------------- Net increase (decrease) 80 $ (94,137) 372,702 $ 4,075,054 ========== ============= =========== ============== CLASS C Shares sold 351,816 $ 4,469,082 2,172,446 $ 22,720,738 Less shares repurchased (293,258) (3,739,703) (1,473,667) (14,186,143) ---------- ------------- ----------- -------------- Net increase 58,558 $ 729,379 698,779 $ 8,534,595 ========== ============= =========== ============== The accompanying notes are an integral part of these financial statements. 19 Pioneer Mid Cap Growth Fund - -------------------------------------------------------------------------------- FINANCIAL HIGHLIGHTS - -------------------------------------------------------------------------------- Six Months Ended 3/31/04 Year Ended Year Ended Year Ended Year Ended Year Ended CLASS A (unaudited) 9/30/03 9/30/02 9/30/01 9/30/00 9/30/99 Net asset value, beginning of period $ 12.68 $ 9.65 $ 11.61 $ 23.15 $ 18.08 $ 16.53 -------- -------- -------- -------- ---------- -------- Increase (decrease) from investment operations: Net investment loss $ (0.03) $ (0.05) $ (0.06) $ (0.03) $ (0.06) $ (0.05) Net realized and unrealized gain (loss) on investments and futures contracts 2.00 3.08 (1.90) (8.39) 8.22 3.05 -------- -------- -------- -------- ---------- -------- Net increase (decrease) from investment operations $ 1.97 $ 3.03 $ (1.96) $ (8.42) $ 8.16 $ 3.00 Distributions to shareowners: Net realized gain -- -- -- (3.12) (3.09) (1.45) -------- -------- -------- -------- ---------- -------- Net increase (decrease) in net asset value $ 1.97 $ 3.03 $ (1.96) $ (11.54) $ 5.07 $ 1.55 -------- -------- -------- -------- ---------- -------- Net asset value, end of period $ 14.65 $ 12.68 $ 9.65 $ 11.61 $ 23.15 $ 18.08 ======== ======== ======== ======== ========== ======== Total return* 15.54% 31.40% (16.88)% (40.26)% 49.93% 19.09% Ratio of net expenses to average net assets+ 0.90%** 0.97% 0.94% 0.87% 0.86% 0.88% Ratio of net investment loss to average net assets+ (0.40)%** (0.46)% (0.45)% (0.23)% (0.30)% (0.27)% Portfolio turnover rate 110%** 52% 48% 65% 81% 150% Net assets, end of period (in thousands) $581,979 $522,269 $424,613 $569,070 $1,054,081 $739,427 Ratios with reduction for fees paid indirectly: Net expenses 0.90%** 0.96% 0.93% 0.85% 0.84% 0.86% Net investment loss (0.40)%** (0.45)% (0.44)% (0.21)% (0.28)% (0.25)% * 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 sale charges. Total return would be reduced if sales charges were taken into account. + Ratios with no reduction for fees paid indirectly. ** Annualized. The accompanying notes are an integral part of these financial statements. 20 Pioneer Mid Cap Growth Fund FINANCIAL HIGHLIGHTS Six Months Ended 3/31/04 Year Ended Year Ended Year Ended Year Ended Year Ended CLASS B (unaudited) 9/30/03 9/30/02 9/30/01 9/30/00 9/30/99 Net asset value, beginning of period $ 11.24 $ 8.66 $ 10.58 $ 21.68 $ 17.24 $ 15.99 ------- ------- ------- ------- ------- ------- Increase (decrease) from investment operations: Net investment loss $ (0.10) $ (0.16) $ (0.25) $ (0.22) $ (0.26) $ (0.10) Net realized and unrealized gain (loss) on investments and futures contracts 1.77 2.74 (1.67) (7.76) 7.79 2.80 ------- ------- ------- ------- ------- ------- Net increase (decrease) from investment operations $ 1.67 $ 2.58 $ (1.92) $ (7.98) $ 7.53 $ 2.70 Distributions to shareowners: Net realized gain -- -- -- (3.12) (3.09) (1.45) ------- ------- ------- ------- ------- ------- Net increase (decrease) in net asset value $ 1.67 $ 2.58 $ (1.92) $(11.10) $ 4.44 $ 1.25 ------- ------- ------- ------- ------- ------- Net asset value, end of period $ 12.91 $ 11.24 $ 8.66 $ 10.58 $ 21.68 $ 17.24 ======= ======= ======= ======= ======= ======= Total return* 14.86% 29.79% (18.15)% (41.08)% 48.51% 17.76% Ratio of net expenses to average net assets+ 2.12%** 2.30% 2.31% 2.01% 1.85% 1.91% Ratio of net investment loss to average net assets+ (1.62)%** (1.79)% (1.83)% (1.35)% (1.28)% (1.31)% Portfolio turnover rate 110%** 52% 48% 65% 81% 150% Net assets, end of period (in thousands) $36,046 $31,392 $20,970 $30,143 $73,968 $10,699 Ratios with reduction for fees paid indirectly: Net expenses 2.12%** 2.29% 2.29% 1.99% 1.83% 1.89% Net investment loss (1.62)%** (1.78)% (1.81)% (1.33)% (1.26)% (1.29)% * 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. + Ratios with no reduction for fees paid indirectly. ** Annualized. The accompanying notes are an integral part of these financial statements. 21 Pioneer Mid Cap Growth Fund FINANCIAL HIGHLIGHTS Six Months Ended 3/31/04 Year Ended Year Ended Year Ended Year Ended Year Ended CLASS C (unaudited) 9/30/03 9/30/02 9/30/01 9/30/00 9/30/99 Net asset value, beginning of period $ 11.60 $ 8.96 $ 10.96 $ 22.32 $ 17.66 $ 16.30 ------- ------- ------- ------- ------- ------- Increase (decrease) from investment operations: Net investment loss $ (0.08) $ (0.10) $ (0.16) $ (0.22) $ (0.01) $ (0.07) Net realized and unrealized gain (loss) on investments and futures contracts 1.82 2.74 (1.84) (8.02) 7.76 2.88 ------- ------- ------- ------- ------- ------- Net increase (decrease) from investment operations $ 1.74 $ 2.64 $ (2.00) $ (8.24) $ 7.75 $ 2.81 Distributions to shareowners: Net realized gain -- -- -- (3.12) (3.09) (1.45) ------- ------- ------- ------- ------- ------- Net increase (decrease) in net asset value $ 1.74 $ 2.64 $ (2.00) $(11.36) $ 4.66 $ 1.36 ------- ------- ------- ------- ------- ------- Net asset value, end of period $ 13.34 $ 11.60 $ 8.96 $ 10.96 $ 22.32 $ 17.66 ======= ======= ======= ======= ======= ======= Total return* 15.00% 29.46% (18.25)% (41.07)% 48.61% 18.13% Ratio of net expenses to average net assets+ 1.85%** 2.26% 2.56% 2.18% 1.88% 1.86% Ratio of net investment loss to average net assets+ (1.35)%** (1.75)% (2.08)% (1.53)% (1.32)% (1.26)% Portfolio turnover rate 110%** 52% 48% 65% 81% 150% Net assets, end of period (in thousands) $21,657 $18,155 $ 7,762 $ 5,641 $11,414 $ 3,005 Ratios with reduction for fees paid indirectly: Net expenses 1.85%** 2.25% 2.50% 2.13% 1.86% 1.82% Net investment loss (1.35)%** (1.74)% (2.02)% (1.48)% (1.30)% (1.22)% * Assumes initial investment at net asset value at the beginning of each period, reinvestment of 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. + Ratio with no reduction for fees paid indirectly. ** Annualized. The accompanying notes are an integral part of these financial statements. 22 Pioneer Mid Cap Growth Fund - -------------------------------------------------------------------------------- NOTES TO FINANCIAL STATEMENTS 3/31/04 (unaudited) - -------------------------------------------------------------------------------- 1. Organization and Significant Accounting Policies Pioneer Mid Cap Growth Fund (the Fund) is a Delaware statutory trust registered under the Investment Company Act of 1940 as a diversified, open-end management investment company. The investment objective of the Fund is to seek capital growth. The Fund offers three classes of shares - Class A, Class B and Class C shares. Shares of Class A, Class B and Class C each represent an interest in the same portfolio of investments of the Fund and have equal rights to voting, redemptions, dividends and liquidation, except that each class of shares can bear different transfer agent and distribution fees and have exclusive voting rights with respect to the distribution plans that have been adopted by Class A, Class B and Class C shareowners, respectively. The Fund's financial statements have been prepared in conformity with accounting principles generally accepted in the United States of America 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 consistently followed by the Fund, which are in conformity with those generally accepted in the investment company industry: A. Security Valuation Security transactions are recorded on trade date. The net asset value is computed once daily, on each day the New York Stock Exchange is open, as of the close of regular trading on the Exchange. In computing the net asset value, securities 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 generally reported, are valued at the mean between the last bid and asked prices. Securities for which market quotations are not readily available are valued at their fair values as determined by, or under the direction of, the Board of Trustees. At March 31, 2004, there were no securities 23 Pioneer Mid Cap Growth Fund - -------------------------------------------------------------------------------- NOTES TO FINANCIAL STATEMENTS 3/31/04 (unaudited) (continued) - -------------------------------------------------------------------------------- fair valued. 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 in exercise of reasonable diligence. Dividend and interest income, including interest on income bearing cash accounts, is recorded on the accrual basis. Temporary cash investments are valued at amortized cost. Gains and losses on sales of investments are calculated on the identified cost method for both financial reporting and federal income tax purposes. B. Futures Contracts The Fund may enter into futures transactions to hedge against changes in interest rates, securities prices, and currency rates or to seek to increase total return. Upon entering into a futures contract, the Fund is required to deposit with a broker an amount of cash or securities equal to the minimum "initial margin" requirements of the associated futures exchange. Subsequent payments for futures contracts ("variation margin") are paid or received by the Fund, depending on the daily fluctuation in the value of the contracts, and are recorded by the Fund as unrealized gains or losses. When the contract is closed, the Fund realizes a gain or loss equal to the difference between the opening and closing value of the contract. The use of futures contracts involves, to varying degrees, elements of market and counterparty risks which may exceed the amounts recognized by the Fund. Changes in value of the contracts may not directly correlate to the changes in value of the underlying securities. These risks may decrease the effectiveness of the Fund's hedging strategies and potentially result in a loss. At March 31, 2004, there were no open futures contracts. C. Federal Income Taxes It is the Fund's policy to comply with the requirements of the Internal Revenue Code applicable to regulated investment companies and to distribute all of its taxable income and net realized capital gains, if any, to its shareowners. Therefore, no federal income tax provision is required. 24 Pioneer Mid Cap Growth Fund - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- The amount and characterization of distributions to shareowners for financial reporting purposes is determined in accordance with federal income tax rules. Therefore, the source of the Fund's distributions may be shown in the accompanying financial statements as either from or in excess of net investment income or net realized gain on investment transactions, or from paid-in capital, depending on the type of book/tax differences that may exist. There were no distributions paid during the years ended September 30, 2003 and 2002. The following shows components of distributable earnings on a federal income tax basis at September 30, 2003. - ------------------------------------------------------ 2003 - ------------------------------------------------------ Undistributed ordinary income $ -- Capital loss carryforward (136,940,380) Post October Loss (20,780,414) Unrealized appreciation 95,773,182 ------------- Total $ (61,947,612) - ------------------------------------------------------ The difference between book basis and tax-basis unrealized appreciation is attributable to the tax deferral of losses on wash sales and the unrealized loss on futures contracts. At September 30, 2003, the Fund has reclassified $2,687,209 to decrease accumulated net investment loss and $2,687,209 to decrease paid-in capital. The reclassification has no impact on the net assets of the Fund and is designed to present the Fund's capital accounts on a tax basis. D. Fund Shares The Fund records sales and repurchases of its shares as of trade date. Pioneer Funds Distributor, Inc. (PFD), the principal underwriter for the Fund and a wholly owned indirect subsidiary of UniCredito Italiano S.p.A., Inc. (UniCredito Italiano) earned $40,968 in underwriting commissions on the sale of Fund shares during the six months ended March 31, 2004. 25 Pioneer Mid Cap Growth Fund - -------------------------------------------------------------------------------- NOTES TO FINANCIAL STATEMENTS 3/31/04 (unaudited) (continued) - -------------------------------------------------------------------------------- E. Class Allocations Distribution fees are calculated based on the average daily net asset value attributable to Class A, Class B and Class C shares of the Fund, respectively. Shareowners of each class share all expenses and fees paid to the transfer agent, Pioneer Investment Management Shareholder Services, Inc. (PIMSS), for its services, which are allocated based on the number of accounts in each class and the ratable allocation of related out-of-pocket expenses (see Note 3). 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 their respective percentage of adjusted net assets at the beginning of the day. 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, at the same time, and in the same amount, except that Class A, Class B and Class C shares can bear different transfer agent and distribution fees. F. Securities Lending The Fund lends securities in its portfolio to certain broker-dealers or other institutional investors, with the Fund's custodian acting as the lending agent. When entering into a loan, the Fund receives collateral, which is maintained by the custodian and earns income in the form of negotiated lenders' fees. The Fund also continues to receive interest or dividends on the securities loaned. Gain or loss on the fair value of the loaned securities that may occur during the term of the loan will be for the account of the Fund. The loans are secured by collateral of at least 102% at all times, of the fair value of the securities loaned. The amount of collateral will be adjusted daily to reflect any price fluctuation in the value of loaned securities. The Fund has the right under the lending agreements to recover the securities on loan from the borrower on demand. The Fund invests cash collateral in the Securities Lending Investment Fund, which is managed by Brown Brothers Harriman & Co., the Fund's custodian. 26 Pioneer Mid Cap Growth Fund - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- G. Repurchase Agreements With respect to repurchase agreements entered into by the Fund, the value of the underlying securities (collateral), including accrued interest received from counterparties, is required to be at least equal to or in excess of the value of the repurchase agreement at the time of purchase. The collateral for all repurchase agreements is held in safekeeping in the customer-only account of the Fund's custodian, or sub custodians. The Fund's investment adviser, Pioneer Investment Management, Inc. (PIM), is responsible for determining that the value of the collateral remains at least equal to the repurchase price. 2. Management Agreement PIM manages the Fund's portfolio and is a wholly owned indirect subsidiary of UniCredito Italiano. PIM receives a basic fee that is calculated at the annual rate of 0.625% of the Fund's average daily net assets. The basic fee is subject to a performance adjustment up to a maximum of -0.20% based on the Fund's investment performance as compared with the Russell Midcap Growth Index. The performance comparison is made for a rolling 36-month period. For the six months ended March 31, 2004, the aggregate performance adjustment resulted in a reduction to the basic fee of $611,399. For the six months ended March 31, 2004, the management fee was equivalent to a rate of 0.429% of average daily net assets. In addition, under the management and administrative agreements, certain other services and costs, including accounting, regulatory reporting and insurance premiums, are paid by the Fund. At March 31, 2004, $265,623 was payable to PIM related to management fees, administrative fees and certain other services, and is included in due to affiliates. 3. Transfer Agent PIMSS, a wholly owned indirect subsidiary of UniCredito Italiano, provides substantially all transfer agent and shareowner services to the Fund at negotiated rates. Included in due to affiliates is $209,997 in transfer agent fees payable to PIMSS at March 31, 2004. 27 Pioneer Mid Cap Growth Fund - -------------------------------------------------------------------------------- NOTES TO FINANCIAL STATEMENTS 3/31/04 (unaudited) (continued) - -------------------------------------------------------------------------------- 4. Distribution Plans The Fund adopted a Plan of Distribution for each class of shares (Class A Plan, Class B Plan and Class C Plan) in accordance with Rule 12b-1 of the Investment Company Act of 1940. Pursuant to the Class A Plan, the Fund pays PFD a service fee of up to 0.25% of the Fund's average daily net assets in reimbursement of its actual expenditures to finance activities primarily intended to result in the sale of Class A shares. On qualifying investments made prior to August 19, 1991, the Class A Plan provides for reimbursement of such expenditures in an amount not to exceed 0.15%. Pursuant to the Class B Plan and the Class C Plan, the Fund pays PFD 1.00% of the average daily net assets attributable to each class of shares. The fee consists of a 0.25% service fee and a 0.75% distribution fee paid as compensation for personal services and/or account maintenance services or distribution services with regard to Class B and Class C shares. Included in due to affiliates is $170,460 in distribution fees payable to PFD at March 31, 2004. In addition, redemptions of each class of 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 one year of purchase. Class B shares that are redeemed within six years of purchase are subject to a CDSC at declining rates beginning at 4.00%, based on the lower of cost or market value of shares being redeemed. Redemptions of Class C shares within one year of purchase are subject to a CDSC of 1.00%. Proceeds from the CDSCs are paid to PFD. For the six months ended March 31, 2004, CDSCs in the amount of $34,507 were paid to PFD. 5. Expense Offset Arrangements The Fund has entered into certain expense offset arrangements with PIMSS resulting in a reduction in the Fund's total expenses due to interest earned on cash held by PIMSS. For the six months ended March 31, 2004, the Fund's expenses were reduced by $4,333 under such arrangements. 28 Pioneer Mid Cap Growth Fund - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- 6. Line of Credit The Fund, along with certain other funds in the Pioneer Family of Funds (the Funds), collectively participate in a $50 million 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 $50 million or the limits set by its prospectus for borrowings. Interest on collective borrowings is payable at the Federal Funds Rate plus 1/2% on an annualized basis. The Funds pay an annual commitment fee for this facility. The commitment fee is allocated among such Funds based on their respective borrowing limits. For the six months ended March 31, 2004, the Fund had no borrowings under this agreement. 29 Pioneer Mid Cap Growth Fund - -------------------------------------------------------------------------------- TRUSTEES, OFFICERS AND SERVICE PROVIDERS - -------------------------------------------------------------------------------- Trustees Officers John F. Cogan, Jr., Chairman John F. Cogan, Jr., President Mary K. Bush Osbert M. Hood, Executive Richard H. Egdahl, M.D. Vice President Margaret B.W. Graham Vincent Nave, Treasurer Osbert M. Hood Dorothy E. Bourassa, Secretary Marguerite A. Piret Stephen K. West John Winthrop Investment Adviser Pioneer Investment Management, Inc. Custodian Brown Brothers Harriman & Co. Principal Underwriter Pioneer Funds Distributor, Inc. Legal Counsel Hale and Dorr 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). This information is also available on the Securities and Exchange Commission's web site at http://www.sec.gov. 30 - -------------------------------------------------------------------------------- THE PIONEER FAMILY OF MUTUAL FUNDS - -------------------------------------------------------------------------------- For information about any Pioneer mutual fund, please contact your investment professional, or call Pioneer at 1-800-225-6292. Ask for a free fund information kit, which includes a fund prospectus. Please read the prospectus carefully before you invest. U.S. Equity International/Global Equity Pioneer Fund Pioneer Emerging Markets Fund Pioneer Balanced Fund Pioneer Europe Select Fund Pioneer Equity Income Fund Pioneer Europe Fund Pioneer Growth Shares Pioneer International Equity Fund Pioneer Mid Cap Growth Fund Pioneer International Value Fund Pioneer Mid Cap Value Fund Pioneer Oak Ridge Large Cap Fixed Income Growth Fund Pioneer America Income Trust Pioneer Oak Ridge Small Cap Pioneer Bond Fund Growth Fund Pioneer Global High Yield Fund Pioneer Papp America-Pacific Pioneer High Yield Fund Rim Fund Pioneer Strategic Income Fund Pioneer Papp Small and Mid Cap Pioneer Tax Free Income Fund Growth Fund Pioneer Papp Stock Fund Money Market Pioneer Papp Strategic Pioneer Cash Reserves Fund** Growth Fund Pioneer Real Estate Shares Pioneer Research Fund* Pioneer Small Cap Value Fund Pioneer Small Company Fund Pioneer Value Fund * Name change effective December 11, 2003. ** An investment in the Fund is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. Although the Fund seeks to preserve the value of your investment at $1.00 per share, it is possible to lose money by investing in the Fund. 31 - -------------------------------------------------------------------------------- PROGRAMS AND SERVICES FOR PIONEER SHAREOWNERS - -------------------------------------------------------------------------------- Your investment professional can give you additional information on Pioneer's programs and services. If you want to order literature on any of the following items directly, simply call Pioneer at 1-8O0-225-6292. FactFone(SM) Our automated account information service, available to you 24 hours a day, seven days a week. FactFone gives you a quick and easy way to check fund share prices, yields, dividends and distributions, as well as information about your own account. Simply call 1-800-225-4321. For specific account information, have your 10-digit account number, your three-digit fund number and your four-digit personal identification number at hand. 6-Month Reinstatement Privilege (for Class A and Class B Shares) Enables you to reinvest all or a portion of the money you redeem from your Pioneer account - without paying a sales charge - within 6 months of your redemption. You have the choice of investing in any Pioneer fund provided the account has the exact same registration and meets the fund's minimum investment requirement. Reinstated accounts may only purchase Class A fund shares. Investomatic Plan An easy and convenient way for you to invest on a regular basis. All you need to do is authorize a set amount of money to be moved out of your bank account into the Pioneer fund of your choice. Investomatic also allows you to change the dollar amount, frequency and investment date right over the phone. By putting aside affordable amounts of money regularly, you can build a long-term investment - without sacrificing your current standard of living. Payroll Investment Program (PIP) Lets you invest in a Pioneer fund directly through your paycheck. All that's involved is for your employer to fill out an authorization form allowing Pioneer to deduct from participating employees' paychecks. You specify the dollar amount you want to invest into the Pioneer fund(s) of your choice. 32 - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- Automatic Exchange Program A simple way to move money from one Pioneer fund to another over a period of time. Just invest a lump sum in one fund, and select the other Pioneer funds you wish to invest in. You choose the amounts and dates for Pioneer to sell shares of your original fund and use the proceeds to buy shares of the other funds you have chosen. Over time, your investment will be shifted out of the original fund. (Automatic Exchange is available for originating accounts with a balance of $5,000 or more.) Directed Dividends Lets you invest cash dividends from one Pioneer fund to an account in another Pioneer fund with no sales charge or fee. Simply fill out the applicable information on a Pioneer Account Options Form. (This program is available for dividend payments only; capital gains distributions are not eligible at this time.) Direct Deposit Lets you move money into your bank account using electronic funds transfer (EFT). EFT moves your money faster than you would receive a check, eliminates unnecessary paper and mail, and avoids lost checks. Simply fill out a Pioneer Direct Deposit Form, giving your instructions. Systematic Withdrawal Plan (SWP) Lets you establish automatic withdrawals from your account at set intervals. You decide the frequency and the day of the month. Pioneer will send the proceeds by check to the address you designate, or electronically to your bank account. You also can authorize Pioneer to make the redemptions payable to someone else. (SWPs are available for accounts with a value of $10,000 or more.) 33 - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- RETIREMENT PLANS FROM PIONEER Pioneer has a long history of helping people work toward their retirement goals, offering plans suited to the individual investor and businesses of all sizes. For more information on Pioneer retirement plans, contact your investment professional, or call Pioneer at 1-800-622-0176. Individual Retirement Accounts (IRAs) Traditional IRA* For anyone under age 70-1/2 earning income. Individuals can contribute up to $3,000 annually. Earnings are tax-deferred, and contributions may be tax-deductible. Roth IRA* Available to single individuals earning less than $110,000 in income annually, and married couples with joint income less than $160,000. Contributions of up to $3,000 a year are not tax-deductible, but all earnings are tax-free for qualified withdrawals. Distributions are tax and penalty-free if certain conditions are met. Employer-Sponsored Plans Uni-K Plan* A 401(k) plan designed specifically for any business that employs only owners and their spouses. Participants can make salary deferral contributions up to $11,000 per year. In addition, each year the business may contribute up to 25% of pay. 401(k) Plan* Allows employees to make pre-tax contributions through payroll deduction, up to $11,000 per year. Employers' contributions are discretionary. The 401(k) offers companies maximum flexibility. SIMPLE IRA Plan* The Savings Incentive Match PLan for Employees (SIMPLE) is designed for employers with 100 or fewer eligible employees. Employees can decide whether to contribute. Employers must contribute. Most retirement plan withdrawals must meet specific conditions to avoid penalties. 34 - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- 403(b) Plan* Also known as a Tax-Sheltered Account (TSA), this plan lets employees of public schools, non-profit hospitals and other tax-exempt organizations make pre-tax contributions through payroll deduction. SEP-IRA The Simplified Employee Pension (SEP) plan lets self-employed people and small-business owners make tax-deductible contributions of up to 25% of income, while maintaining complete contribution flexibility each year. Profit Sharing Plan Companies can decide each year whether - and how much - to contribute to participants, up to 25% of each participant's pay. Can include vesting schedules that are not available with a SEP-IRA. Age-Based Profit Sharing Plan Employer contributions are flexible, but are based on a formula using age and salary. Each year, a business can contribute up to 25% of the total eligible payroll. Money Purchase Pension Plan (MPP) Allows employer contributions, up to 25% of pay annually. Companies must contribute a fixed percentage of pay each year. Defined Benefit Pension Plan Requires a business to contribute enough each year to fund a specific future benefit. Most beneficial to older employees who need to accumulate assets rapidly. * Special Catch-Up Provisions are available to individuals age 50 and older to contribute additional amounts to their retirement accounts. For more information, call our Retirement Plans Information line at 1-800-622-0176. Most retirement plan withdrawals must meet specific conditions to avoid penalties. 35 - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- This page for your notes. - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- This page for your notes. - -------------------------------------------------------------------------------- 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 Telecommunications Device for the Deaf (TDD) 1-800-225-1997 Write to us: PIMSS P.O. Box 55014 Boston, Massachusetts 02205-5014 Our toll-free fax 1-800-225-4240 Our internet e-mail address ask.pioneer@pioneerinvest.com (for general questions about Pioneer only) Visit our website: www.pioneerfunds.com Please consider the fund's investment objectives, risks, charges and expenses carefully before investing. The prospectus contains this and other information about the fund and should be read carefully before you invest or send money. To obtain a prospectus and for other information on any Pioneer fund, call 1-800-225-6292 or visit our website www.pioneerfunds.com. [LOGO] PIONEER Investments(R) Pioneer Investment Management, Inc. 60 State Street 15215-00-0504 Boston, Massachusetts 02109 (C) 2004 Pioneer Funds Distributor, Inc. www.pioneerfunds.com Underwriter of Pioneer mutual funds, Member SIPC ITEM 2. CODE OF ETHICS. (a) Disclose whether, as of the end of the period covered by the report, the registrant has adopted a code of ethics that applies to the registrant's principal executive officer, principal financial officer, principal accounting officer or controller, or persons performing similar functions, regardless of whether these individuals are employed by the registrant or a third party. If the registrant has not adopted such a code of ethics, explain why it has not done so. The registrant has adopted, as of the end of the period covered by this report, a code of ethics that applies to the registrant's principal executive officer, principal financial officer, principal accounting officer and controller. (b) For purposes of this Item, the term "code of ethics" means written standards that are reasonably designed to deter wrongdoing and to promote: (1) Honest and ethical conduct, including the ethical handling of actual or apparent conflicts of interest between personal and professional relationships; (2) Full, fair, accurate, timely, and understandable disclosure in reports and documents that a registrant files with, or submits to, the Commission and in other public communications made by the registrant; (3) Compliance with applicable governmental laws, rules, and regulations; (4) The prompt internal reporting of violations of the code to an appropriate person or persons identified in the code; and (5) Accountability for adherence to the code. (c) The registrant must briefly describe the nature of any amendment, during the period covered by the report, to a provision of its code of ethics that applies to the registrant's principal executive officer, principal financial officer, principal accounting officer or controller, or persons performing similar functions, regardless of whether these individuals are employed by the registrant or a third party, and that relates to any element of the code of ethics definition enumerated in paragraph (b) of this Item. The registrant must file a copy of any such amendment as an exhibit pursuant to Item 10(a), unless the registrant has elected to satisfy paragraph (f) of this Item by posting its code of ethics on its website pursuant to paragraph (f)(2) of this Item, or by undertaking to provide its code of ethics to any person without charge, upon request, pursuant to paragraph (f)(3) of this Item. The registrant has made no amendments to the code of ethics during the period covered by this report. (d) If the registrant has, during the period covered by the report, granted a waiver, including an implicit waiver, from a provision of the code of ethics to the registrant's principal executive officer, principal financial officer, principal accounting officer or controller, or persons performing similar functions, regardless of whether these individuals are employed by the registrant or a third party, that relates to one or more of the items set forth in paragraph (b) of this Item, the registrant must briefly describe the nature of the waiver, the name of the person to whom the waiver was granted, and the date of the waiver. Not applicable. (e) If the registrant intends to satisfy the disclosure requirement under paragraph (c) or (d) of this Item regarding an amendment to, or a waiver from, a provision of its code of ethics that applies to the registrant's principal executive officer, principal financial officer, principal accounting officer or controller, or persons performing similar functions and that relates to any element of the code of ethics definition enumerated in paragraph (b) of this Item by posting such information on its Internet website, disclose the registrant's Internet address and such intention. Not applicable. (f) The registrant must: (1) File with the Commission, pursuant to Item 10(a), a copy of its code of ethics that applies to the registrant's principal executive officer, principal financial officer, principal accounting officer or controller, or persons performing similar functions, as an exhibit to its annual report on this Form N-CSR; (2) Post the text of such code of ethics on its Internet website and disclose, in its most recent report on this Form N-CSR, its Internet address and the fact that it has posted such code of ethics on its Internet website; or (3) Undertake in its most recent report on this Form N-CSR to provide to any person without charge, upon request, a copy of such code of ethics and explain the manner in which such request may be made. 	See Item 10(2) ITEM 3. AUDIT COMMITTEE FINANCIAL EXPERT. (a) (1) Disclose that the registrant's board of trustees has determined that the registrant either: (i) Has at least one audit committee financial expert serving on its audit committee; or (ii) Does not have an audit committee financial expert serving on its audit committee. The registrant's Board of Trustees has determined that the registrant has at least one audit committee financial expert. (2) If the registrant provides the disclosure required by paragraph (a)(1)(i) of this Item, it must disclose the name of the audit committee financial expert and whether that person is "independent." In order to be considered "independent" for purposes of this Item, a member of an audit committee may not, other than in his or her capacity as a member of the audit committee, the board of trustees, or any other board committee: (i) Accept directly or indirectly any consulting, advisory, or other compensatory fee from the issuer; or (ii) Be an "interested person" of the investment company as defined in Section 2(a)(19) of the Act (15 U.S.C. 80a-2(a)(19)). Ms. Marguerite A. Piret, an independent trustee, is such an audit committee financial expert. (3) If the registrant provides the disclosure required by paragraph (a)(1) (ii) of this Item, it must explain why it does not have an audit committee financial expert. Not applicable. ITEM 4. PRINCIPAL ACCOUNTANT FEES AND SERVICES. (a) Disclose, under the caption AUDIT FEES, the aggregate fees billed for each of the last two fiscal years for professional services rendered by the principal accountant for the audit of the registrant's annual financial statements or services that are normally provided by the accountant in connection with statutory and regulatory filings or engagements for those fiscal years. N/A (b) Disclose, under the caption AUDIT-RELATED FEES, the aggregate fees billed in each of the last two fiscal years for assurance and related services by the principal accountant that are reasonably related to the performance of the audit of the registrant's financial statements and are not reported under paragraph (a) of this Item. Registrants shall describe the nature of the services comprising the fees disclosed under this category. N/A (c) Disclose, under the caption TAX FEES, the aggregate fees billed in each of the last two fiscal years for professional services rendered by the principal accountant for tax compliance, tax advice, and tax planning. Registrants shall describe the nature of the services comprising the fees disclosed under this category. N/A (d) Disclose, under the caption ALL OTHER FEES, the aggregate fees billed in each of the last two fiscal years for products and services provided by the principal accountant, other than the services reported in paragraphs (a) through (c) of this Item. Registrants shall describe the nature of the services comprising the fees disclosed under this category. N/A (e) (1) Disclose the audit committee's pre-approval policies and procedures described in paragraph (c)(7) of Rule 2-01 of Regulation S-X. PIONEER FUNDS APPROVAL OF AUDIT, AUDIT-RELATED, TAX AND OTHER SERVICES PROVIDED BY THE INDEPENDENT AUDITOR SECTION I - POLICY PURPOSE AND APPLICABILITY The Pioneer Funds recognizes 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 recognizes that a Fund's independent auditors: 1) possess knowledge of the Funds, 2) are able to incorporate certain services into the scope of the audit, thereby avoiding redundant work, cost and disruption of Fund personnel and processes, and 3) have expertise that has value to the Funds. As a result, there are situations where it is desirable to use the Fund's independent auditors for services in addition to the annual audit and where the potential for conflicts of interests are minimal. Consequently, this policy, which is intended to comply with Rule 210.2-01(C)(7), sets forth guidelines and procedures to be followed by the Funds when retaining the independent audit firm to perform audit, audit-related tax and other services under those circumstances, while also maintaining independence. Approval of a service in accordance with this policy for a Fund shall also constitute approval for any other Fund whose pre-approval is required pursuant to Rule 210.2-01(c)(7)(ii). In addition to the procedures set forth in this policy, any non-audit services that may be provided consistently with Rule 210.2-01 may be approved by the Audit Committee itself and any pre-approval that may be waived in accordance with Rule 210.2-01(c)(7)(i)(C) is hereby waived. Selection of a Fund's independent auditors and their compensation shall be determined by the Audit Committee and shall not be subject to this policy. SECTION II - POLICY - ---------------- -------------------------------- ------------------------------------------------- SERVICE SERVICE CATEGORY DESCRIPTION SPECIFIC PRE-APPROVED SERVICE SUBCATEGORIES CATEGORY - ---------------- -------------------------------- ------------------------------------------------- I. AUDIT Services that are directly o Accounting research assistance SERVICES related to performing the o SEC consultation, registration independent audit of the Funds statements, and reporting o Tax accrual related matters o Implementation of new accounting standards o Compliance letters (e.g. rating agency letters) o Regulatory reviews and assistance regarding financial matters o Semi-annual reviews (if requested) o Comfort letters for closed end offerings - ---------------- -------------------------------- ------------------------------------------------- II. Services which are not o AICPA attest and agreed-upon procedures AUDIT-RELATED prohibited under Rule o Technology control assessments SERVICES 210.2-01(C)(4) (the "Rule") o Financial reporting control assessments and are related extensions of o Enterprise security architecture the audit services support the assessment audit, or use the knowledge/expertise gained from the audit procedures as a foundation to complete the project. In most cases, if the Audit-Related Services are not performed by the Audit firm, the scope of the Audit Services would likely increase. The Services are typically well-defined and governed by accounting professional standards (AICPA, SEC, etc.) - ---------------- -------------------------------- ------------------------------------------------- ------------------------------------- ------------------------------------ AUDIT COMMITTEE APPROVAL POLICY AUDIT COMMITTEE REPORTING POLICY ------------------------------------- ------------------------------------ o "One-time" pre-approval o A summary of all such for the audit period for all services and related fees pre-approved specific service reported at each regularly subcategories. Approval of the scheduled Audit Committee independent auditors as meeting. auditors for a Fund shall constitute pre approval for these services. ------------------------------------- ------------------------------------ o "One-time" pre-approval o A summary of all such for the fund fiscal year within services and related fees a specified dollar limit (including comparison to for all pre-approved specified dollar limits) specific service subcategories reported quarterly. o Specific approval is needed to exceed the pre-approved dollar limit for these services (see general Audit Committee approval policy below for details on obtaining specific approvals) o Specific approval is needed to use the Fund's auditors for Audit-Related Services not denoted as "pre-approved", or to add a specific service subcategory as "pre-approved" ------------------------------------- ------------------------------------ SECTION III - POLICY DETAIL, CONTINUED - ----------------------- --------------------------- ----------------------------------------------- SERVICE CATEGORY SERVICE CATEGORY SPECIFIC PRE-APPROVED SERVICE SUBCATEGORIES DESCRIPTION - ----------------------- --------------------------- ----------------------------------------------- III. TAX SERVICES Services which are not o Tax planning and support prohibited by the Rule, o Tax controversy assistance if an officer of the Fund o Tax compliance, tax returns, excise determines that using the tax returns and support Fund's auditor to provide o Tax opinions these services creates significant synergy in the form of efficiency, minimized disruption, or the ability to maintain a desired level of confidentiality. - ----------------------- --------------------------- ----------------------------------------------- - ------------------------------------- ------------------------- AUDIT COMMITTEE APPROVAL POLICY AUDIT COMMITTEE REPORTING POLICY - ------------------------------------- ------------------------- - ------------------------------------- ------------------------- o "One-time" pre-approval o A summary of for the fund fiscal year all such services and within a specified dollar limit related fees 				 (including comparison 			 to specified dollar 			 limits) reported 			 quarterly. o Specific approval is needed to exceed the pre-approved dollar limits for these services (see general Audit Committee approval policy below for details on obtaining specific approvals) o Specific approval is needed to use the Fund's auditors for tax services not denoted as pre-approved, or to add a specific service subcategory as "pre-approved" - ------------------------------------- ------------------------- SECTION III - POLICY DETAIL, CONTINUED - ----------------------- --------------------------- ----------------------------------------------- SERVICE CATEGORY SERVICE CATEGORY SPECIFIC PRE-APPROVED SERVICE SUBCATEGORIES DESCRIPTION - ----------------------- --------------------------- ----------------------------------------------- IV. OTHER SERVICES Services which are not o Business Risk Management support prohibited by the Rule, o Other control and regulatory A. SYNERGISTIC, if an officer of the Fund compliance projects UNIQUE QUALIFICATIONS determines that using the Fund's auditor to provide these services creates significant synergy in the form of efficiency, minimized disruption, the ability to maintain a desired level of confidentiality, or where the Fund's auditors posses unique or superior qualifications to provide these services, resulting in superior value and results for the Fund. - ----------------------- --------------------------- ----------------------------------------------- - --------------------------------------- ------------------------ AUDIT COMMITTEE APPROVAL POLICY AUDIT COMMITTEE REPORTING POLICY - ------------------------------------- -------------------------- o "One-time" pre-approval o A summary of for the fund fiscal year within all such services and a specified dollar limit related fees 			 (including comparison 			 to specified dollar 				 limits) reported quarterly. o Specific approval is needed to exceed the pre-approved dollar limits for these services (see general Audit Committee approval policy below for details on obtaining specific approvals) o Specific approval is needed to use the Fund's auditors for "Synergistic" or "Unique Qualifications" Other Services not denoted as pre-approved to the left, or to add a specific service subcategory as "pre-approved" - ------------------------------------- -------------------------- SECTION III - POLICY DETAIL, CONTINUED - ----------------------- ------------------------- ----------------------------------------------- SERVICE CATEGORY SERVICE CATEGORY SPECIFIC PROHIBITED SERVICE SUBCATEGORIES DESCRIPTION - ----------------------- ------------------------- ----------------------------------------------- PROHIBITED SERVICES Services which result 1. Bookkeeping or other services in the auditors losing related to the accounting records or independence status financial statements of the audit under the Rule. client* 2. Financial information systems design and implementation* 3. Appraisal or valuation services, fairness* opinions, or contribution-in-kind reports 4. Actuarial services (i.e., setting actuarial reserves versus actuarial audit work)* 5. Internal audit outsourcing services* 6. Management functions or human resources 7. Broker or dealer, investment advisor, or investment banking services 8. Legal services and expert services unrelated to the audit 9. Any other service that the Public Company Accounting Oversight Board determines, by regulation, is impermissible - ----------------------- ------------------------- ----------------------------------------------- - ------------------------------------------- ------------------------------ AUDIT COMMITTEE APPROVAL POLICY AUDIT COMMITTEE REPORTING POLICY - ------------------------------------------- ------------------------------ o These services are not to be o A summary of all performed with the exception of the(*) services and related services that may be permitted fees reported at each if they would not be subject to audit regularly scheduled procedures at the audit client (as Audit Committee meeting defined in rule 2-01(f)(4)) level will serve as continual the firm providing the service. confirmation that has 				 not provided any restricted services. - ------------------------------------------- ------------------------------ - -------------------------------------------------------------------------------- GENERAL AUDIT COMMITTEE APPROVAL POLICY: o For all projects, the officers of the Funds and the Fund's auditors will each make an assessment to determine that any proposed projects will not impair independence. o Potential services will be classified into the four non-restricted service categories and the "Approval of Audit, Audit-Related, Tax and Other Services" Policy above will be applied. Any services outside the specific pre-approved service subcategories set forth above must be specifically approved by the Audit Committee. o At least quarterly, the Audit Committee shall review a report summarizing the services by service category, including fees, provided by the Audit firm as set forth in the above policy. - -------------------------------------------------------------------------------- (2) Disclose the percentage of services described in each of paragraphs (b) through (d) of this Item that were approved by the audit committee pursuant to paragraph (c)(7)(i)(C) of Rule 2-01 of Regulation S-X. N/A (f) If greater than 50 percent, disclose the percentage of hours expended on the principal accountant's engagement to audit the registrant's financial statements for the most recent fiscal year that were attributed to work performed by persons other than the principal accountant's full-time, permanent employees. N/A (g) Disclose the aggregate non-audit fees billed by the registrant's accountant for services rendered to the registrant, and rendered to the registrant's investment adviser (not including any sub-adviser whose role is primarily portfolio management and is subcontracted with or overseen by another investment adviser), and any entity controlling, controlled by, or under common control with the adviser that provides ongoing services to the registrant for each of the last two fiscal years of the registrant. N/A (h) Disclose whether the registrant's audit committee of the board of trustees has considered whether the provision of non-audit services that were rendered to the registrant's investment adviser (not including any subadviser whose role is primarily portfolio management and is subcontracted with or overseen by another investment adviser), and any entity controlling, controlled by, or under common control with the investment adviser that provides ongoing services to the registrant that were not pre-approved pursuant to paragraph (c)(7)(ii) of Rule 2-01 of Regulation S-X is compatible with maintaining the principal accountant's independence. N/A ITEMS 5-6. [RESERVED] 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. [RESERVED] ITEM 9. CONTROLS AND PROCEDURES. (a) Disclose the conclusions of the registrant's principal executive officer or officers and principal financial officer or officers, or persons performing similar functions, about the effectiveness of the registrant's disclosure controls and procedures (as defined in Rule 30a-2(c) under the Act (17 CFR 270.30a-2(c))) based on their evaluation of these controls and procedures as of a date within 90 days of the filing date of the report that includes the disclosure required by this paragraph. The registrant's certifying officers have determined that the registrant's disclosure controls and procedures are effective based on our evaluation of these controls and procedures as of a date within 90 days prior to the filing date of this report. (b) Disclose whether or not there were significant changes in the registrant's internal controls or in other factors that could significantly affect these controls subsequent to the date of their evaluation, including any corrective actions with regard to significant deficiencies and material weaknesses. There were no significant changes in the registrant's internal controls or in other factors that could significantly affect these controls subsequent to the date of their evaluation, including any corrective actions with regard to significant deficiencies and material weaknesses. ITEM 10. EXHIBITS. File the exhibits listed below as part of this Form. Letter or number the exhibits in the sequence indicated. (a) Any code of ethics, or amendment thereto, that is the subject of the disclosure required by Item 2, to the extent that the registrant intends to satisfy the Item 2 requirements through filing of an exhibit. (b) A separate certification for each principal executive officer and principal financial officer of the registrant as required by Rule 30a-2 under the Act (17 CFR 270.30a-2). Filed herewith. SIGNATURES [See General Instruction F] Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. (Registrant) Pioneer Mid Cap Growth Fund By (Signature and Title)* /s/ John F. Cogan, Jr. John F. Cogan, Jr, President Date June 3, 2004 Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated. By (Signature and Title)* /s/ John F. Cogan, Jr. John F. Cogan, Jr., President Date June 3, 2004 By (Signature and Title)* /s/ Vincent Nave Vincent Nave, Treasurer Date June 3, 2004 * Print the name and title of each signing officer under his or her signature.