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, 2002 through September 30, 2003 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 Annual Report 9/30/03 [LOGO] Table of Contents - -------------------------------------------------------------------------------- Letter to Shareowners 1 Portfolio Summary 2 Performance Update 3 Portfolio Management Discussion 6 Schedule of Investments 9 Financial Statements 18 Notes to Financial Statements 24 Report of Independent Auditors 31 Results of Shareowner Meeting 32 The Pioneer Family of Mutual Funds 34 Trustees, Officers and Service Providers 35 Programs and Services for Pioneer Shareowners 42 Retirement Plans from Pioneer 44 Pioneer Mid Cap Growth Fund - -------------------------------------------------------------------------------- LETTER TO SHAREOWNERS 9/30/03 - -------------------------------------------------------------------------------- Dear Shareowners, - -------------------------------------------------------------------------------- The stock market rally that began last spring extended into late summer as signs of an economic recovery accumulated. Gross domestic product, a tally of all goods and services produced in the United States, expanded, thanks to increased personal consumption, housing and business spending, low short-term interest rates and lower taxes on individuals. While broader market indicators managed small gains, the NASDAQ Composite rose sharply in the third quarter as investors sensed that companies might soon boost technology outlays. September's dip in consumer expectations linked to slow job creation, plus cutbacks in OPEC oil production, drove markets off their highest levels. Investors also kept an eye on the news, as U.S. troops came under daily fire in Iraq and tensions elsewhere remained. As the economy appeared to strengthen, investors senior financial positions.who had sought safety in U.S. Treasury issues grew less risk-averse. As a result, corporate bonds moved broadly higher and the Treasury bond rally stalled. Some of the biggest gains were recorded among lower-rated, high-yield bonds whose issuers often depend on a strong economy to boost earnings. Bonds in emerging and developed markets also did well, as economies stabilized and currencies rose against the slumping U.S. dollar. - -------------------------------------------------------------------------------- Pioneer's new president Osbert Hood was recently named Chief Executive Officer and President of Pioneer Investments U.S.A. Mr. Hood, formerly Pioneer's Chief Operating Officer and a key member of the senior management committee, joined Pioneer in 2000 from John Hancock Financial Services, where he had held "I am excited and honored to have the opportunity to lead Pioneer as it continues to grow," Mr. Hood said. "As CEO I look forward to furthering Pioneer's strategic goals, including developing new products that can meet the wider needs of investors and the advisers who serve them." - -------------------------------------------------------------------------------- Stocks and bonds, bonds and stocks Over the past few years, investor sentiment has swung from stocks to bonds and back again, from U.S. government securities to corporate and international issues. Each sector has spent time in the spotlight or back stage, delivering periods of stronger or weaker perfor mance relative to one another. With sectors constantly moving in and out of favor, how can you increase your chances of holding investments that are performing well? By owning several kinds of securities, not just one or two. Through a process called asset allocation, you can create an investment mix that reflects your needs, taking into account such factors as your age, your financial goals and their timing, and, of course, your comfort level where risk is concerned. Asset allocation is only one area in which a qualified investment professional can serve you well. Ask your advisor to review how shifting markets may have affected your asset allocation recently. And if you've never thought about asset allocation before, now is the best time to start. Like everyone at Pioneer, I appreciate your continued confidence in our products and services. Respectfully, /s/ Osbert Hood Osbert Hood, President and Chief Executive Officer 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 9/30/03 - -------------------------------------------------------------------------------- Portfolio Diversification - -------------------------------------------------------------------------------- (As a percentage of total investment portfolio) [Data below is represented by a pie chart in the original report] U.S. Common Stocks 90.3% Temporary Cash Investments 5.0% Exchange-Traded Funds 4.3% Depositary Receipts for International Stocks 0.4% Sector Distribution - -------------------------------------------------------------------------------- (As a percentage of equity holdings) [Data below is represented by a pie chart in the original report] Information Technology 29.0% Health Care 21.9% Consumer Discretionary 17.5% Financials 7.1% Energy 6.2% Industrials 6.1% Exchange-Traded Funds 4.5% Materials 4.0% Consumer Staples 3.2% Telecommunication Services 0.5% 10 Largest Holdings - -------------------------------------------------------------------------------- (As a percentage of total investment in securities)* - -------------------------------------------------------------------------------- 1. Nasdaq 100 Index Traded 6. Brinker International, Inc. 1.38% Fund 2.76% - -------------------------------------------------------------------------------- 2. Russell Midcap Growth Index 7. SPX Corp. 1.34% Fund, iShares 1.80% - -------------------------------------------------------------------------------- 3. Symantec Corp. 1.58% 8. Biomet, Inc. 1.34% - -------------------------------------------------------------------------------- 4. International Game 9. Sungard Data Systems, Inc. 1.29% Technology 1.43% - -------------------------------------------------------------------------------- 5. Zimmer Holdings, Inc. 1.41% 10. Biovail Corp., Intl. 1.27% - -------------------------------------------------------------------------------- *This list excludes money market and derivative instruments. Portfolio holdings will vary for other periods. 2 Pioneer Mid Cap Growth Fund - -------------------------------------------------------------------------------- PERFORMANCE UPDATE 9/30/03 CLASS A SHARES - -------------------------------------------------------------------------------- Share Prices and Distributions - -------------------------------------------------------------------------------- Net Asset Value per Share 9/30/03 9/30/02 $12.68 $9.65 Net Distributions per Share Investment Short-Term Long-Term (10/1/02 - 9/30/03) 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 September 30,2003) Net Asset Public Offering Period Value Price* 10 Years 4.41% 3.80% 5 Years 3.08% 1.86% 1 Year 31.40% 23.83% - -------------------------------------------------------------------------------- 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, [Data below is represented by a mountain chart in the original report] Value of $10,000 Investment Date Pioneer Mid Cap Russell Midcap Growth Fund* Growth Index 9/93 $9,425 $10,000 $9,672 $10,242 9/95 $11,242 $13,281 $12,210 $15,450 9/97 $14,817 $20,030 $12,461 $18,152 9/99 $14,840 $24,905 $22,249 $39,939 9/01 $13,292 $19,264 $11,048 $16,278 9/03 $14,517 $22,609 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. Past performance does not guarantee future results. Return and principal value fluctuate, and your shares, when redeemed, may be worth more or less than their original cost. 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 9/30/03 CLASS B SHARES - -------------------------------------------------------------------------------- Share Prices and Distributions - -------------------------------------------------------------------------------- Net Asset Value per Share 9/30/03 9/30/02 $11.24 $8.66 Net Distributions per Share Investment Short-Term Long-Term (10/1/02 - 9/30/03) 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 September 30, 2003) If If Period Held Redeemed* Life-of-Class (2/1/96) 2.40% 2.40% 5 Years 1.80 1.67 1 Year 29.79 25.79 - -------------------------------------------------------------------------------- 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. [Data below is represented by a mountain chart in the original report] Value of $10,000 Investment+ Date Pioneer Mid Cap Russell Midcap Growth Fund* Growth Index 2/96 $10,000 $10,000 $10,765 $10,812 9/97 $12,904 $14,017 $10,728 $12,702 9/99 $12,634 $17,428 $18,763 $27,949 9/01 $11,055 $13,481 $9,049 $11,391 9/03 $11,745 $15,820 + 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. Past performance does not guarantee future results. Return and principal value fluctuate, and your shares, when redeemed, may be worth more or less than their original cost. 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 9/30/03 CLASS C SHARES - -------------------------------------------------------------------------------- Share Prices and Distributions - -------------------------------------------------------------------------------- Net Asset Value per Share 9/30/03 9/30/02 $11.60 $8.96 Net Distributions per Share Investment Short-Term Long-Term (10/1/02 - 9/30/03) 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 September 30, 2003) Net Asset Public Offering Period Value Price/CDSC* Life-of-Class (2/1/96) 2.58% 2.45% 5 Years 1.81 1.61 1 Year 29.46 28.18 - -------------------------------------------------------------------------------- All returns reflect reinvestment of distributions at net asset value. * Reflects deduction of the 1% sales charge at the beginning of the period. The 1% contingent deferred sales charge (CDSC) applies to redemptions made within one year of purchase. [Data below is represented by a mountain chart in the original report] Value of $10,000 Investment+ Date Pioneer Mid Cap Russell Midcap Growth Fund* Growth Index 2/96 $9,900 $10,000 $10,686 $10,812 9/97 $12,937 $14,017 $10,767 $12,702 9/99 $12,719 $17,428 $18,901 $27,949 9/01 $11,139 $13,481 $9,106 $11,391 9/03 $11,789 $15,820 + 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. Past performance does not guarantee future results. Return and principal value fluctuate, and your shares, when redeemed, may be worth more or less than their original cost. 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 9/30/03 - -------------------------------------------------------------------------------- Pioneer Mid Cap Growth Fund delivered strong returns during the fiscal year that ended on September 30, 2003. The early termination of major combat in Iraq combined with the strengthening U.S. economy to draw investors back to stocks. In the following discussion, portfolio manager Eric Weigel explains his strategies and details the decisions that contributed to the Fund's results. Q: Please tell us about conditions in the market over the last 12 months. A: The period began with the markets on edge over possible war with Iraq. After touching lows in October, stocks rallied briefly, then fell again as the economy seemed to stagnate and war grew inevitable. Once it became clear in March that initial combat operations would be short and that the economy was recovering, stocks rallied vigorously. As often happens coming out of a recession, sectors that had been driven down the most were among the leading performers. Q: How did the Fund perform during this up-and-down period? A: Pioneer Mid Cap Growth Fund's Class A, B and C shares had total returns of 31.40%, 29.79% and 29.46%, respectively, at net asset value, for the 12 months ended September 30, 2003. The Russell Midcap Growth Index, the Fund's benchmark, had a return of 38.89% for the same period. Q: Which of your decisions had the most impact, for better or worse? A: Early in the period we chose to approach stocks conservatively because of uncertainty over the war's length and its possible economic impact. This cautious strategy restrained performance relative to our benchmark during the first part of the rally, as the sharpest gains occurred among speculative issues that do not fit our selection process. We became more aggressive once the end of major combat was in sight, and the Fund has since participated fully in the extended rally. As the economy picked up steam, consumer spending remained strong, and employment statistics and interest rates both appeared to be stabilizing. 6 Pioneer Mid Cap Growth Fund - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- Q: Which areas affected performance most? A: By the end of the period, the economy seemed to be accelerating and investors were anticipating a revival of capital spending, especially on technology. Good stock selection made technology the Fund's best-performing sector despite our early underweight (compared to the Fund's benchmark) stance and our avoidance of speculative areas such as the Internet. Our investment style leads us to technology companies with attractive prospects for expanding earnings. Two examples are Lexar Media and Sandisk, makers of flash media for digital devices, which were strong contributors. We were overweight compared to the Fund's benchmark in the metals and mining sector, a decision that benefited performance. Growing demand for copper has pushed prices higher as world economies show signs of shaking off recent slumps. China in particular is importing large supplies of copper to build up its electric and communications infrastructures. Copper miners Phelps Dodge and Freeport McMoRan both rose sharply while Newmont Mining benefited from demand for gold, whose price tends to rise during periods of international stress. Q: Which other areas had a positive impact on Fund results? A: Health care in general was an area of strong performance for the Fund, with Johnson & Johnson's acquisition of Scios our most prominent success story. Zimmer Holdings and Biomet both moved higher, based on strong sales of orthopedic implants. And widespread pressure to constrain health care costs made generic drug makers another successful sector; Barr Laboratories, Mylan Laboratories and Alpharma all rose, thanks to increased demand for generic alternatives to costly brand-name drugs. Q: Which areas produced disappointments? A: We overweighted (relative to the Fund's benchmark) defense stocks in the belief that investors would see the expanding defense budget as a source of steady earnings growth. But investors preferred more glamorous sectors, and the huge federal deficit cast doubt on the government's ability to fund programs in the future. We reduced holdings in L3 Communications, a leading maker of electronic equipment for defense applications, when questions arose about the way the company accounts for acquisitions. 7 Pioneer Mid Cap Growth Fund - -------------------------------------------------------------------------------- PORTFOLIO MANAGEMENT DISCUSSION 9/30/03 (continued) - -------------------------------------------------------------------------------- Higher oil prices were not enough to attract investors to energy stocks despite prospects for stable and growing earnings. Energy issues that hurt performance included Devon Energy, which acquired Ocean Energy earlier this year. Investors questioned Devon's management skill as well its exploration strategy in the wake of some dry holes. We continue to hold Devon because of its low current valuation and our favorable view of its potential. Q: What is your outlook for the economy and for mid-cap stocks? A: With the economy expanding at its fastest rate in years, corporate earnings may be expected to follow. The weak dollar should help U.S. exporters, while tax cuts and low interest rates should benefit consumers as well as companies here. There is lots of investable cash available to support stocks if the news continues to favor equities. The argument can also be made that stocks are ahead of economic realities. But as a group, mid-cap stocks are still attractively valued compared to larger-capitalization issues, based on such measures as price-to-earnings and price-to-book. Although traditionally more volatile than large caps, mid-cap stocks appear poised to deliver faster earnings growth over the next few quarters. Furthermore, mid-caps have been ignored by Wall Street thus far in the rally, opening up opportunities for value-conscious investors like Pioneer. 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 9/30/03 - -------------------------------------------------------------------------------- Shares Value COMMON STOCKS - 90.4% Energy - 5.9% Integrated Oil & Gas - 0.8% 78,000 Murphy Oil Corp. $ 4,582,500 ------------ Oil & Gas Drilling - 2.3% 90,100 BJ Services Co.* $ 3,078,717 85,800 ENSCO International, Inc. 2,301,156 134,100 Patterson Energy, Inc.* 3,630,087 75,000 Tidewater, Inc. 2,122,500 130,000 Varco International, Inc.* 2,198,300 ------------ $ 13,330,760 ------------ Oil & Gas Exploration & Production - 2.8% 105,559 Devon Energy Corp. $ 5,086,888 156,300 Forest Oil Corp.* 3,743,385 174,000 Pioneer Natural Resources Co.* 4,430,040 135,500 Suncor Energy, Inc. 2,513,525 ------------ $ 15,773,838 ------------ Total Energy $ 33,687,098 ------------ Materials - 3.8% Commodity Chemicals - 0.5% 47,500 Praxair, Inc. $ 2,942,625 ------------ Diversified Metals & Mining - 1.4% 150,200 Freeport-McMoRan Copper & Gold, Inc. (Class B) $ 4,971,620 69,100 Phelps Dodge Corp.* 3,233,880 ------------ $ 8,205,500 ------------ Metal & Glass Containers - 0.6% 65,000 Ball Corp. $ 3,510,000 ------------ Precious Metals & Minerals - 0.7% 99,700 Newmont Mining Corp. $ 3,897,273 ------------ Specialty Chemicals - 0.6% 69,000 Valspar Corp. $ 3,218,850 ------------ Total Materials $ 21,774,248 ------------ Capital Goods - 3.4% Electrical Components & Equipment - 0.3% 101,500 American Power Conversion Corp. $ 1,739,710 ------------ The accompanying notes are an integral part of these financial statements. 9 Pioneer Mid Cap Growth Fund - -------------------------------------------------------------------------------- SCHEDULE OF INVESTMENTS 9/30/03 (continued) - -------------------------------------------------------------------------------- Shares Value Industrial Conglomerates - 1.8% 73,800 American Standard Companies, Inc.* $ 6,217,650 66,100 ITT Industries, Inc. 3,955,424 ------------ $ 10,173,074 ------------ Industrial Machinery - 1.3% 160,700 SPX Corp.* $ 7,276,496 ------------ Total Capital Goods $ 19,189,280 ------------ Commercial Services & Supplies - 1.4% Data Processing Services - 0.1% 21,400 Equifax, Inc. $ 476,578 ------------ Diversified Commercial Services - 1.3% 35,279 Apollo Group, Inc.* $ 2,329,472 118,500 H & R Block, Inc. 5,113,275 ------------ $ 7,442,747 ------------ Total Commercial Services & Supplies $ 7,919,325 ------------ Transportation - 1.1% Airlines - 0.3% 125,000 Delta Air Lines, Inc. $ 1,662,500 ------------ Railroads - 0.8% 84,400 Canadian National Railway Co. $ 4,390,488 ------------ Total Transportation $ 6,052,988 ------------ Automobiles & Components - 0.7% Auto Parts & Equipment - 0.7% 60,800 Borg-Warner Automotive, Inc. $ 4,125,280 ------------ Total Automobiles & Components $ 4,125,280 ------------ Consumer Durables & Apparel - 2.2% Apparel, Accessories & Luxury Goods - 1.3% 62,500 Abercrombie & Fitch Co.* $ 1,731,875 282,900 TJX Companies, Inc. 5,493,918 ------------ $ 7,225,793 ------------ Leisure Products - 0.9% 280,000 Mattel, Inc. $ 5,308,800 ------------ Total Consumer Durables & Apparel $ 12,534,593 ------------ The accompanying notes are an integral part of these financial statements. 10 Pioneer Mid Cap Growth Fund - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- Shares Value Hotels, Restaurants & Leisure - 7.1% Casinos & Gaming - 3.4% 156,300 GTECH Holdings Corp. $ 6,697,455 53,800 Harrah's Entertainment Inc. 2,265,518 275,400 International Game Technology 7,752,510 289,700 Park Place Entertainment Corp.* 2,610,197 ------------ $ 19,325,680 ------------ Restaurants - 3.7% 86,142 Bob Evans Farms $ 2,300,853 224,100 Brinker International, Inc.* 7,475,976 218,300 Starbucks Corp.* 6,287,040 172,300 Yum! Brands, Inc.* 5,103,526 ------------ $ 21,167,395 ------------ Total Hotels, Restaurants & Leisure $ 40,493,075 ------------ Retailing - 6.5% Apparel Retail - 2.7% 196,500 Jones Apparel Group, Inc. $ 5,881,245 107,700 Liz Claiborne, Inc. 3,667,185 81,200 Ross Stores, Inc. 3,764,432 194,100 Tommy Hilfiger Corp.* 2,311,731 ------------ $ 15,624,593 ------------ Computer & Electronics Retail - 0.4% 73,000 Radioshack Corp. $ 2,073,930 ------------ General Merchandise Stores - 1.4% 86,400 Dollar Tree Stores, Inc.* $ 2,894,400 132,700 Family Dollar Stores, Inc. 5,293,403 ------------ $ 8,187,803 ------------ Specialty Stores - 2.0% 96,900 Bed Bath & Beyond, Inc.* $ 3,699,642 62,900 Michaels Stores, Inc. 2,563,804 215,800 Staples, Inc.* 5,125,250 ------------ $ 11,388,696 ------------ Total Retailing $ 37,275,022 ------------ The accompanying notes are an integral part of these financial statements. 11 Pioneer Mid Cap Growth Fund - -------------------------------------------------------------------------------- SCHEDULE OF INVESTMENTS 9/30/03 (continued) - -------------------------------------------------------------------------------- Shares Value Food & Drug Retailing - 2.6% Food Distributors - 1.6% 47,799 Amerisourcebergen Corp. $ 2,583,536 141,600 McKesson HBOC, Inc. 4,713,864 86,200 Supervalue, Inc. 2,056,732 ------------ $ 9,354,132 ------------ Food Retail - 1.0% 211,300 McCormick & Co, Inc. $ 5,793,846 ------------ Total Food & Drug Retailing $ 15,147,978 ------------ Household & Personal Products - 0.3% Household Products - 0.3% 59,700 Estee Lauder Co. $ 2,035,770 ------------ Total Household & Personal Products $ 2,035,770 ------------ Health Care Equipment & Services - 13.5% Health Care Distributors - 2.1% 66,700 Allergan, Inc. $ 5,251,291 185,300 Biovail Corp., Intl.* 6,883,895 ------------ $ 12,135,186 ------------ Health Care Equipment - 4.9% 148,600 Baxter International, Inc. $ 4,318,316 216,000 Biomet, Inc. 7,259,760 80,500 St. Jude Medical, Inc.* 4,328,485 59,500 Stryker Corp. 4,480,945 138,700 Zimmer Holdings, Inc.* 7,642,370 ------------ $ 28,029,876 ------------ Health Care Facilities - 1.0% 99,000 DaVita, Inc.* $ 3,151,170 120,100 Health Management Associates, Inc. 2,619,381 ------------ $ 5,770,551 ------------ Health Care Services - 3.3% 112,500 Apria Healthcare Group, Inc.* $ 3,080,250 45,700 Express Scripts, Inc.* 2,794,555 142,465 IMS Health, Inc. 3,006,012 109,000 Lincare Holdings, Inc.* 3,994,850 61,500 Pediatrix Medical Group, Inc.* 2,832,075 47,900 Quest Diagnostics, Inc.* 2,904,656 ------------ $ 18,612,398 ------------ The accompanying notes are an integral part of these financial statements. 12 Pioneer Mid Cap Growth Fund - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- Shares Value Health Care Supplies - 0.4% 73,900 Charles River Laboratories International, Inc.* $ 2,267,991 ------------ Managed Health Care - 1.8% 76,400 Anthem, Inc.* $ 5,449,612 62,400 Wellpoint Health Networks, Inc.* 4,809,792 ------------ $ 10,259,404 ------------ Total Health Care Equipment & Services $ 77,075,406 ------------ Pharmaceuticals & Biotechnology - 7.3% Biotechnology - 4.3% 98,700 Biogen, Inc.* $ 3,773,301 82,100 Celgene Corp.* 3,557,393 191,900 Cubist Pharmaceuticals, Inc.* 2,070,601 41,700 Gilead Sciences, Inc.* 2,332,281 118,500 Human Genome Sciences, Inc.* 1,618,710 107,300 IDEC Pharmaceuticals Corp.* 3,556,995 44,600 Invitrogen Corp.* 2,586,354 149,500 MedImmune, Inc.* 4,934,995 ------------ $ 24,430,630 ------------ Pharmaceuticals - 3.0% 58,900 Barr Laboratorie, Inc.* $ 4,017,569 163,450 IVAX Corp.* 3,203,620 104,900 Mylan Laboratories, Inc. 4,054,385 136,200 Sepracor, Inc.* 3,750,948 49,400 Watson Pharmaceuticals, Inc.* 2,059,486 ------------ $ 17,086,008 ------------ Total Pharmaceuticals & Biotechnology $ 41,516,638 ------------ Banks - 2.4% Regional Banks - 1.6% 93,200 North Fork Bancorporation, Inc. $ 3,238,700 73,100 Synovus Financial Corp. 1,826,769 87,000 TCF Financial Corp. 4,171,650 ------------ $ 9,237,119 ------------ Thrifts & Mortgage Finance - 0.8% 76,500 The PMI Group, Inc. $ 2,581,875 43,100 Radian Group, Inc. 1,913,640 ------------ $ 4,495,515 ------------ Total Banks $ 13,732,634 ------------ The accompanying notes are an integral part of these financial statements. 13 Pioneer Mid Cap Growth Fund - -------------------------------------------------------------------------------- SCHEDULE OF INVESTMENTS 9/30/03 (continued) - -------------------------------------------------------------------------------- Shares Value Diversified Financials - 2.0% Asset Management & Custody Banks - 0.6% 50,400 Legg Mason Inc. $ 3,638,880 ------------ Consumer Finance - 0.4% 62,400 SLM Corp. $ 2,431,104 ------------ Specialized Finance - 1.0% 100,700 Moody's Corp. $ 5,535,479 ------------ Total Diversified Financials $ 11,605,463 ------------ Insurance - 2.3% Insurance Brokers - 1.0% 104,700 Platinum Underwriter Holdings Ltd. $ 2,942,070 89,500 Willis Group Holdings Ltd. 2,752,125 ------------ $ 5,694,195 ------------ Property & Casualty Insurance - 1.3% 58,075 MBIA, Inc. $ 3,192,383 133,100 Old Republic International Corp. 4,404,279 ------------ $ 7,596,662 ------------ Total Insurance $ 13,290,857 ------------ Software & Services - 13.7% Application Software - 5.9% 131,400 Adobe Systems, Inc. $ 5,158,764 253,200 Cadence Design System, Inc.* 3,392,880 139,493 Intuit, Inc.* 6,729,142 201,800 Synopsys, Inc.* 6,209,386 136,000 Symantec Corp.+* 8,570,720 80,700 Verint Systems, Inc.* 1,726,980 62,566 Veritas Software Corp.* 1,964,572 ------------ $ 33,752,444 ------------ Data Processing & Outsourced Services - 4.6% 117,900 Affiliated Computer Services, Inc.* $ 5,740,551 404,900 Concord EFS, Inc.* 5,534,983 141,100 DST Systems, Inc.* 5,305,360 80,000 Fiserv, Inc.* 2,898,400 265,100 SunGard Data Systems, Inc.* 6,974,781 ------------ $ 26,454,075 ------------ The accompanying notes are an integral part of these financial statements. 14 Pioneer Mid Cap Growth Fund - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- Shares Value Home Entertainment Software - 2.2% 66,200 Electronic Arts, Inc.* $ 6,105,626 187,132 Take-Two Interactive Software, Inc.* 6,394,300 ------------ $ 12,499,926 ------------ IT Consulting & Other Services - 0.5% 80,649 Cognizant Technology Solutions Corp.* $ 2,941,269 ------------ Systems Software - 0.5% 225,500 Netiq Corp.* $ 2,692,470 ------------ Total Software & Services $ 78,340,184 ------------ Technology Hardware & Development - 7.2% Networking Equipment - 0.5% 130,000 Network Appliance Inc.* $ 2,668,900 ------------ Communications Equipment - 1.8% 277,315 Ciena Corp.* $ 1,638,932 143,200 L-3 Communications Holdings, Inc.* 6,193,400 152,500 Nokia Corp. (A.D.R.) 2,379,000 ------------ $ 10,211,332 ------------ Computer Storage & Peripherals - 2.8% 243,200 Lexar Media, Inc.* $ 4,144,128 90,400 Lexmark International Group, Inc.* 5,696,104 799,000 Quantum Corp. - DLT & Storage Systems* 2,460,920 58,800 Sandisk Corp.* 3,747,912 ------------ $ 16,049,064 ------------ Electronic Equipment & Instruments - 1.4% 118,400 Flextronics International, Ltd.* $ 1,678,912 54,400 W.W. Grainger, Inc. 2,586,720 137,300 Waters Corp.* 3,766,139 ------------ $ 8,031,771 ------------ Electronic Manufacturing Services - 0.3% 168,000 Sanmina-SCI Corp.* $ 1,629,600 ------------ Technology Distributors - 0.4% 74,400 Technology Data Corp.* $ 2,295,240 ------------ Total Technology Hardware & Development $ 40,885,907 ------------ The accompanying notes are an integral part of these financial statements. 15 Pioneer Mid Cap Growth Fund - -------------------------------------------------------------------------------- SCHEDULE OF INVESTMENTS 9/30/03 (continued) - -------------------------------------------------------------------------------- Shares Value Semiconductors - 6.5% Semiconductor Equipment - 3.5% 129,400 Brooks Automation, Inc.* $ 2,704,460 244,300 Credence Systems Corp.* 2,809,450 51,500 Cymer, Inc.* 2,121,800 69,600 DuPont Photomasks, Inc.* 1,580,616 93,100 KLA-Tencor Corp.* 4,785,340 144,700 Lam Research Corp.* 3,205,105 80,800 Novellus Systems, Inc.* 2,727,000 ------------ $ 19,933,771 ------------ Semiconductors - 3.0% 65,000 Analog Devices, Inc.* $ 2,471,300 477,200 Applied Micro Circuits Corp.* 2,323,964 96,900 Cypress Semiconductor Corp.* 1,713,192 80,000 Intersil Holding Corp.* 1,904,000 111,600 Microchip Technology 2,671,704 209,400 Micron Technology, Inc.* 2,810,148 100,000 Semtech Corp.* 1,846,000 184,200 Skyworks Solutions, Inc.* 1,676,220 ------------ $ 17,416,528 ------------ Total Semiconductors $ 37,350,299 ------------ Telecommunication Services - 0.5% Integrated Telecommunication Services - 0.5% 47,400 Telephone and Data Systems, Inc. $ 2,679,996 ------------ Total Telecommunication Services $ 2,679,996 ------------ TOTAL COMMON STOCKS (Cost $426,748,955) $516,712,041 ------------ EXCHANGE TRADED FUNDS - 4.3% 461,200 Nasdaq 100 Index Traded Fund* $ 14,951,095 147,700 Russell Midcap Growth Index Fund, iShares 9,724,568 ------------ TOTAL EXCHANGE TRADED FUNDS (Cost $18,512,307) $ 24,675,663 ------------ The accompanying notes are an integral part of these financial statements. 16 Pioneer Mid Cap Growth Fund - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- Principal Amount Value TEMPORARY CASH INVESTMENT - 4.9% Repurchase Agreement - 4.9% $28,200,000 UBS, 0.70%, dated 9/30/03, repurchase price of $28,200,000 plus accrued interest on 10/1/03 collateralized by $24,138,000 U.S. Treasury Bonds, 1.50%, 2/28/05 and $4,206,000 U.S. Treasury Notes, 7.875%, 11/15/04 $ 28,200,000 ------------ TOTAL TEMPORARY CASH INVESTMENT (Cost $28,200,000) $ 28,200,000 ------------ TOTAL INVESTMENT IN SECURITIES - 99.6% (Cost $473,461,262) (a)(b)(c) $569,587,704 ------------ OTHER ASSETS AND LIABILITIES - 0.4% $ 2,227,541 ------------ TOTAL NET ASSETS - 100.0% $571,815,245 ------------ * Non-income producing security. (A.D.R.) American Depositary Receipt (a) At September 30, 2003, the net unrealized gain on investments based on cost for federal income tax purposes of $473,814,522 was as follows: Aggregate gross unrealized gain for all investments in which there is an excess of value over tax cost $112,741,631 Aggregate gross unrealized loss for all investments in which there is an excess of tax cost over value (16,968,449) ------------ Net unrealized gain $95,773,182 ------------ (b) At September 30, 2003, the Fund had a net capital loss carryforward of $136,940,380, of which, $2,193,301 will expire in 2009, $26,831,229 will expire in 2010 and $107,915,850 will expire in 2011, if not utilized. (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. + At September 30, 2003, the following security has been pledged to cover margin requirements for open futures contracts: Shares Security Market Value 120,500 Symantec Corp. $7,593,910 Purchases and sales of securities (excluding temporary cash investments) for the year ended September 30, 2003 aggregated $239,446,482 and $237,936,642, respectively. The accompanying notes are an integral part of these financial statements. 17 Pioneer Mid Cap Growth Fund - -------------------------------------------------------------------------------- STATEMENT OF ASSETS AND LIABILITIES 9/30/03 - -------------------------------------------------------------------------------- ASSETS: Investment in securities, at value (Cost $473,461,262) $569,587,704 Cash 2,572 Receivables - Investment securities sold 8,625,839 Fund shares sold 219,909 Dividends and interest 163,808 Other 25,685 ------------ Total assets $578,625,517 ------------ LIABILITIES: Payables - Investments purchased $ 5,300,723 Fund shares repurchased 298,571 Variation margin 528,000 Due to affiliates 508,748 Accrued expenses 174,230 ------------ Total liabilities $ 6,810,272 ------------ NET ASSETS: Paid-in capital $633,761,848 Accumulated net realized loss on investments and futures contracts (157,225,816) Net unrealized gain on investments 96,126,442 Net unrealized loss on futures contracts (847,229) ------------ Total net assets $571,815,245 ------------ NET ASSET VALUE PER SHARE: (Unlimited number of shares authorized) Class A (based on $522,268,617/41,189,558 shares) $ 12.68 ------------ Class B (based on $31,391,657/2,793,058 shares) $ 11.24 ------------ Class C (based on $18,154,971/1,565,390 shares) $ 11.60 ------------ MAXIMUM OFFERING PRICE: Class A ($12.68 [divided by] 94.25%) $ 13.45 ------------ Class C ($11.60 [divided by] 99.00%) $ 11.72 ------------ The accompanying notes are an integral part of these financial statements. 18 Pioneer Mid Cap Growth Fund STATEMENT OF OPERATIONS For the Year Ended 9/30/03 INVESTMENT INCOME: Dividends (net of foreign taxes withheld of $11,764) $ 2,006,207 Interest 516,200 Income from securities loaned, net 5,832 ------------- Total investment income $ 2,528,239 ------------- EXPENSES: Management fees Basic fee $ 3,091,854 Performance adjustment (989,393) Transfer agent fees Class A 1,117,095 Class B 195,600 Class C 68,340 Distribution fees Class A 1,014,242 Class B 245,773 Class C 91,003 Administrative fees 122,293 Custodian fees 46,829 Professional fees 47,969 Registration fees 33,996 Printing 103,276 Fees and expenses of nonaffiliated trustees 19,084 Miscellaneous 23,933 ------------- Total expenses $ 5,231,894 Less fees paid indirectly (16,446) ------------- Net expenses $ 5,215,448 ------------- Net investment loss $ (2,687,209) ------------- REALIZED AND UNREALIZED GAIN (LOSS) ON INVESTMENTS AND FUTURES CONTRACTS: Net realized gain (loss) from: Investments $ (45,172,677) Futures contracts 3,681,137 $ (41,491,540) ------------- ------------- Change in net unrealized gain (loss) on investments from Investments $ 178,280,119 Futures contracts 372,343 $ 178,652,462 ------------- ------------- Net gain on investments and futures contracts $ 137,160,922 ------------- Net increase in net assets resulting from operations $ 134,473,713 ------------- The accompanying notes are an integral part of these financial statements. 19 Pioneer Mid Cap Growth Fund - -------------------------------------------------------------------------------- STATEMENTS OF CHANGES IN NET ASSETS - -------------------------------------------------------------------------------- For the Years Ended 9/30/03 and 9/30/02, Respectively Year Ended Year Ended 9/30/03 9/30/02 FROM OPERATIONS: Net investment loss $ (2,687,209) $ (3,367,748) Net realized loss on investments and futures contracts (41,491,540) (98,282,320) Change in net unrealized gain (loss) on investments and futures contracts 178,652,462 13,053,282 ------------- ------------- Net increase (decrease) in net assets resulting from operations $134,473,713 $ (88,596,786) ------------- ------------- FROM FUND SHARE TRANSACTIONS: Net proceeds from sale of shares $120,986,421 $ 159,483,357 Cost of shares repurchased (136,990,163) (222,395,158) ------------- ------------- Net decrease in net assets resulting from Fund share transactions $(16,003,742) $ (62,911,801) ------------- ------------- Net increase (decrease) in net assets $118,469,971 $(151,508,587) NET ASSETS: Beginning of year 453,345,274 604,853,861 ------------- ------------- End of year $571,815,245 $ 453,345,274 ------------- ------------- '03 Shares '03 Amount '02 Shares '02 Amount CLASS A Shares sold 7,898,793 $ 84,222,738 10,188,500 $ 133,403,614 Less shares repurchased (10,724,595) (112,836,129) (15,179,572) (195,701,907) ----------- -------------- ----------- -------------- Net decrease (2,825,802) $ (28,613,391) (4,991,072) $ (62,298,293) ----------- -------------- ----------- -------------- CLASS B Shares sold 1,380,824 $ 14,042,945 1,476,686 $ 18,174,422 Less shares repurchased (1,008,122) (9,967,891) (1,905,525) (22,249,617) ----------- -------------- ----------- -------------- Net increase (decrease) 372,702 $ 4,075,054 (428,839) $ (4,075,195) ----------- -------------- ----------- -------------- CLASS C Shares sold 2,172,446 $ 22,720,738 713,266 $ 7,905,321 Less shares repurchased (1,473,667) (14,186,143) (361,354) (4,443,634) ----------- -------------- ----------- -------------- Net increase 698,779 $ 8,534,595 351,912 $ 3,461,687 ----------- -------------- ----------- -------------- The accompanying notes are an integral part of these financial statements. 20 Pioneer Mid Cap Growth Fund - ------------------------------------------------------------------------------------------------------------------------------ FINANCIAL HIGHLIGHTS - ------------------------------------------------------------------------------------------------------------------------------ Year Ended Year Ended Year Ended Year Ended Year Ended CLASS A 9/30/03 9/30/02 9/30/01 9/30/00 9/30/99 Net asset value, beginning of period $ 9.65 $ 11.61 $ 23.15 $ 18.08 $ 16.53 ------- -------- -------- ---------- -------- Increase (decrease) from investment operations: Net investment loss $ (0.05) $ (0.06) $ (0.03) $ (0.06) $ (0.05) Net realized and unrealized gain (loss) on investments and futures contracts 3.08 (1.90) (8.39) 8.22 3.05 ------- -------- -------- ---------- -------- Net increase (decrease) from investment operations $ 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 $ 3.03 $ (1.96) $ (11.54) $ 5.07 $ 1.55 ------- -------- -------- ---------- -------- Net asset value, end of period $ 12.68 $ 9.65 $ 11.61 $ 23.15 $ 18.08 ------- -------- -------- ---------- -------- Total return* 31.40% (16.88)% (40.26)% 49.93% 19.09% Ratio of net expenses to average net assets+ 0.97% 0.94% 0.87% 0.86% 0.88% Ratio of net investment loss to average net assets+ (0.46)% (0.45)% (0.23)% (0.30)% (0.27)% Portfolio turnover rate 52% 48% 65% 81% 150% Net assets, end of period (in thousands) $522,269 $424,613 $569,070 $1,054,081 $739,427 Ratios with reduction for fees paid indirectly: Net expenses 0.96% 0.93% 0.85% 0.84% 0.86% Net investment loss (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 sales charges. Total return would be reduced if sales charges were taken into account. + Ratios with no reduction for fees paid indirectly. The accompanying notes are an integral part of these financial statements. 21 Pioneer Mid Cap Growth Fund - ------------------------------------------------------------------------------------------------------------------------- FINANCIAL HIGHLIGHTS - ------------------------------------------------------------------------------------------------------------------------- Year Ended Year Ended Year Ended Year Ended Year Ended CLASS B 9/30/03 9/30/02 9/30/01 9/30/00 9/30/99 Net asset value, beginning of period $ 8.66 $ 10.58 $ 21.68 $ 17.24 $ 15.99 ------- -------- -------- ------- ------- Increase (decrease) from investment operations: Net investment loss $ (0.16) $ (0.25) $ (0.22) $ (0.26) $ (0.10) Net realized and unrealized gain (loss) on investments and futures contracts 2.74 (1.67) (7.76) 7.79 2.80 ------- -------- -------- ------- ------- Net increase (decrease) from investment operations $ 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 $ 2.58 $ (1.92) $ (11.10) $ 4.44 $ 1.25 ------- -------- -------- ------- ------- Net asset value, end of period $ 11.24 $ 8.66 $ 10.58 $ 21.68 $ 17.24 ------- -------- -------- ------- ------- Total return* 29.79% (18.15)% (41.08)% 48.51% 17.76% Ratio of net expenses to average net assets+ 2.30% 2.31% 2.01% 1.85% 1.91% Ratio of net investment loss to average net assets+ (1.79)% (1.83)% (1.35)% (1.28)% (1.31)% Portfolio turnover rate 52% 48% 65% 81% 150% Net assets, end of period (in thousands) $31,392 $ 20,970 $ 30,143 $73,968 $10,699 Ratios with reduction for fees paid indirectly: Net expenses 2.29% 2.29% 1.99% 1.83% 1.89% Net investment loss (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. The accompanying notes are an integral part of these financial statements. 22 Pioneer Mid Cap Growth Fund - ----------------------------------------------------------------------------------------------------------------------- FINANCIAL HIGHLIGHTS - ----------------------------------------------------------------------------------------------------------------------- Year Ended Year Ended Year Ended Year Ended Year Ended CLASS C 9/30/03 9/30/02 9/30/01 9/30/00 9/30/99 Net asset value, beginning of year $ 8.96 $ 10.96 $ 22.32 $ 17.66 $ 16.30 ------- -------- -------- ------- ------- Increase (decrease) from investment operations: Net investment loss $ (0.10) $ (0.16) $ (0.22) $ (0.01) $ (0.07) Net realized and unrealized gain on investments and futures contracts 2.74 (1.84) (8.02) 7.76 2.88 ------- -------- -------- ------- ------- Net increase (decrease) from investment operations $ 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 $ 2.64 $ (2.00) $ (11.36) $ 4.66 $ 1.36 ------- -------- -------- ------- ------- Net asset value, end of year $ 11.60 $ 8.96 $ 10.96 $ 22.32 $ 17.66 ------- -------- -------- ------- ------- Total return* 29.46% (18.25)% (41.07)% 48.61% 18.13% Ratio of net expenses to average net assets+ 2.26% 2.56% 2.18% 1.88% 1.86% Ratio of net investment loss to average net assets+ (1.75)% (2.08)% (1.53)% (1.32)% (1.26)% Portfolio turnover rate 52% 48% 65% 81% 150% Net assets, end of year (in thousands) $18,155 $ 7,762 $ 5,641 $11,414 $ 3,005 Ratios with reduction for fees paid indirectly: Net expenses 2.25% 2.50% 2.13% 1.86% 1.82% Net investment loss (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 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. The accompanying notes are an integral part of these financial statements. 23 Pioneer Mid Cap Growth Fund - -------------------------------------------------------------------------------- NOTES TO FINANCIAL STATEMENTS 9/30/03 - -------------------------------------------------------------------------------- 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 year. 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 as of 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 the 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. Dividend income is recorded on the ex-dividend date except that certain dividends from foreign securities where 24 Pioneer Mid Cap Growth Fund - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- the ex-dividend date may have passed are recorded as soon as the Fund becomes aware of the ex-dividend data in the exercise of reasonable diligence. Interest income, including interest on income bearing cash accounts, is recorded on the accrual basis. 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 potential risk to the Fund is that the change in value of the contracts may not directly correlate to the change in value of the underlying securities. At September 30, 2003, open futures contracts were as follows: - -------------------------------------------------------------------------------- Number of Contracts Settlement Market Unrealized Type Long/(Short) Month Value Gain (Loss) - -------------------------------------------------------------------------------- NASDAQ 100 176 12/03 $11,492,800 $ (847,229) - -------------------------------------------------------------------------------- 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. 25 Pioneer Mid Cap Growth Fund - -------------------------------------------------------------------------------- NOTES TO FINANCIAL STATEMENTS 9/30/03 (continued) - -------------------------------------------------------------------------------- The 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. 26 Pioneer Mid Cap Growth Fund - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- 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 $54,099 in underwriting commissions on the sale of Fund shares during the year ended September 30, 2003. 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 the 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 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 27 Pioneer Mid Cap Growth Fund - -------------------------------------------------------------------------------- NOTES TO FINANCIAL STATEMENTS 9/30/03 (continued) - -------------------------------------------------------------------------------- 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. 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 subcustodians. 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. Pursuant to a shareowner vote on April 17, 2003 the benchmark was changed from the Standard & Poor's (S&P) MidCap 400 Index effective May 1, 2003; however the S&P MidCap 400 Index will be used for monthly periods prior to May 1, 2003 until it is eventually phased out. The performance comparison is made for a rolling 36-month period. For the year ended September 30, 2003, the aggregate performance adjustment resulted in a reduction to the basic fee of $989,393. For the year ended September 30, 2003, the management fee was equivalent to a rate of 0.425% 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 September 30, 2003, $237,066 was payable to PIM related to management fees, administrative fees and certain other services, and is included in due to affiliates. 28 Pioneer Mid Cap Growth Fund - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- 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 $121,640 in transfer agent fees payable to PIMSS at September 30, 2003. 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 $150,042 in distribution fees payable to PFD at September 30, 2003. 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 year ended September 30, 2003, CDSCs in the amount of $39,897 were paid to PFD. 5. Expense Offsets The Fund has entered into certain directed brokerage and expense offset arrangements resulting in a reduction in the Fund's total expenses. For the year ended September 30, 2003, the Fund's expenses were reduced by $16,446 under such arrangements. 29 Pioneer Mid Cap Growth Fund - -------------------------------------------------------------------------------- NOTES TO FINANCIAL STATEMENTS 9/30/03 (continued) - -------------------------------------------------------------------------------- 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 year ended September 30, 2003, the Fund had no borrowings under this agreement. 30 Pioneer Mid Cap Growth Fund - -------------------------------------------------------------------------------- REPORT OF INDEPENDENT AUDITORS - -------------------------------------------------------------------------------- To the Board of Trustees and Shareowners of Pioneer Mid Cap Growth Fund: We have audited the accompanying statement of assets and liabilities, including the schedule of investments, of Pioneer Mid Cap Growth Fund (the "Fund") as of September 30, 2003, and the related statement of operations for the year then ended, and the statements of changes in net assets and the financial highlights for each of the two years in the period then ended. These financial statements and financial highlights are the responsibility of the Fund's management. Our responsibility is to express an opinion on these financial statements and financial highlights based on our audit. The financial highlights for each of the three years in the period ended September 30, 2001 were audited by other auditors who have ceased operations and whose report, dated November 5, 2001, expressed an unqualified opinion on those financial highlights. We conducted our audits in accordance with auditing standards generally accepted in the United States. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements and financial highlights are free of material misstatement. An audit includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements and financial highlights. Our procedures included confirmation of securities as of September 30, 2003, by correspondence with the custodian and brokers or by other appropriate auditing procedures where replies from brokers were not received. An audit also includes assessing the accounting principles used and significant estimates made by management, as well as evaluating the overall financial statement presentation. We believe that our audits provide a reasonable basis for our opinion. In our opinion, the financial statements and financial highlights referred to above present fairly, in all material respects, the financial position of Pioneer Mid Cap Growth Fund at September 30, 2003, the results of its operations for the year then ended, and the changes in its net assets and the financial highlights for each of the two years in the period then ended in conformity with accounting principles generally accepted in the United States. ERNST & YOUNG LLP Boston, Massachusetts November 7, 2003 31 Pioneer Mid Cap Growth Fund - -------------------------------------------------------------------------------- RESULTS OF SHAREOWNER MEETING - -------------------------------------------------------------------------------- On April 17, 2003, the Fund held a special meeting of shareowners to vote on four proposals. All proposals were passed by a shareowner vote. Here are the detailed results of the votes. Proposal 1 - To elect Trustees. Nominee Affirmative Withheld John F. Cogan, Jr. 33,534,957.569 1,152,480.454 Mary K. Bush 33,509,888.256 1,177,549.767 Richard H. Egdhal, M.D. 33,523,742.629 1,163,695.394 Daniel T. Geraci 33,567,629.587 1,119,808.436 Margaret B.W. Graham 33,585,104.256 1,102,333.767 Marguerite A. Piret 33,584,542.942 1,102,895.081 Stephen K. West 33,498,495.369 1,188,942.654 John Winthrop 33,629,072.260 1,058,365.763 Proposal 2 -- To approve a new management contract. Affirmative Against Abstain 26,378,672.069 1,809,447.000 1,051,764.954 Proposal 3 -- To approve a policy allowing Pioneer and the board of trustees to appoint or terminate subavisers and to approve amendments to subadvisory agreements without shareowner approval. Affirmative Against Abstain 26,047,112.794 2,232,253.240 960,517.989 Proposal 4 (a) -- To approve a change to the Fund's investment policy on senior securities. Affirmative Against Abstain 25,932,187.477 1,748,818.704 1,558,877.842 Proposal 4 (b) -- To approve a change to the Fund's investment policy on borrowing. Affirmative Against Abstain 25,758,754.651 1,906,637.819 1,574,491.553 Proposal 4 (c) -- To approve a change to the Fund's investment policy on real estate. Affirmative Against Abstain 25,905,171.932 1,766,441.901 1,568,270.190 32 Pioneer Mid Cap Growth Fund - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- Proposal 4 (d) -- To approve a change to the Fund's investment policy on loans. Affirmative Against Abstain 25,875,482.206 1,796,131.627 1,568,270.190 Proposal 4 (e) -- To approve a change to the Fund's investment policy on commodities. Affirmative Against Abstain 25,907,091.244 1,763,744.314 1,569,048.465 Proposal 4 (f) -- To approve a change to the Fund's investment policy on diversification. Affirmative Against Abstain 25,912,902.933 1,759,657.247 1,567,323.843 Proposal 4 (g) -- To approve a change to the Fund's investment policy on acting as an underwriter. Affirmative Against Abstain 25,916,962.512 1,745,754.309 1,577,167.202 Proposal 4 (h) -- To approve a change to the Fund's investment policy on concentration. Affirmative Against Abstain 25,964,163.959 1,698,552.862 1,577,167.202 Proposal 4 (i) -- To approve a change to the Fund's investment policy on guarantees. Affirmative Against Abstain 25,790,612.146 1,870,761.855 1,578,510.022 Proposal 4 (j) -- To approve a change to the Fund's investment policy on margin. Affirmative Against Abstain 25,740,071.948 1,921,866.598 1,577,945.477 Proposal 4 (k) -- To approve a change to the Fund's investment policy on short sales. Affirmative Against Abstain 25,726,565.640 1,933,392.054 1,579,926.329 33 Pioneer Mid Cap Growth Fund - -------------------------------------------------------------------------------- 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 Fixed Income Pioneer Fund Pioneer America Income Trust Pioneer Balanced Fund Pioneer Bond Fund Pioneer Core Equity Fund Pioneer High Yield Fund Pioneer Equity Income Fund Pioneer Stable Value Fund Pioneer Growth Shares Pioneer Strategic Income Fund Pioneer Mid Cap Growth Fund Pioneer Tax Free Income Fund Pioneer Mid Cap Value Fund Pioneer Real Estate Shares Money Market Pioneer Small Cap Value Fund Pioneer Cash Reserves Fund* Pioneer Small Company Fund Pioneer Value Fund International/Global Equity Pioneer Emerging Markets Fund Pioneer Europe Select Fund Pioneer Europe Fund Pioneer International Equity Fund Pioneer International Value Fund * 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. 34 Pioneer Mid Cap Growth Fund - -------------------------------------------------------------------------------- TRUSTEES, OFFICERS AND SERVICE PROVIDERS - -------------------------------------------------------------------------------- Investment Adviser Pioneer Investment Management, Inc. Custodian Brown Brothers Harriman & Co. Independent Auditors Ernst & Young LLP Principal Underwriter Pioneer Funds Distributor, Inc. Legal Counsel Hale and Dorr LLP Shareowner Services and Transfer Agent Pioneer Investment Management Shareholder Services, Inc. Trustees and Officers The Fund's Board of Trustees provides broad supervision over the Fund's affairs. The officers of the Fund are responsible for the Fund's operations. The Fund's Trustees and officers are listed below, together with their principal occupations during the past five years. Trustees who are interested persons of the Fund within the meaning of the Investment Company Act of 1940 are referred to as Interested Trustees. Trustees who are not interested persons of the Fund are referred to as Independent Trustees. Each of the Trustees serves as a trustee of each of the 51 U.S. registered investment portfolios for which Pioneer Investment Management, Inc. ("Pioneer") serves as investment adviser (the "Pioneer Funds"). The address for all Interested Trustees and all officers of the Fund is 60 State Street, Boston, Massachusetts 02109. The Fund's statement of additional information provides more detailed information regarding the Fund's Trustees and is available upon request, without charge, by calling 1-800-225-6292. 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 at pioneerfunds.com. 35 - -------------------------------------------------------------------------------- INTERESTED TRUSTEES - -------------------------------------------------------------------------------- Name and Age Position Held With the Fund Term of Office/Length of Service John F. Cogan, Jr. (77)* Chairman of the Board, Since 1982. Trustee and President Serves until a successor trustee is elected or earlier retirement or removal. *Mr. Cogan is an Interested Trustee because he is an officer or director of the Trust's investment adviser and certain of its affiliates. - ------------------------------------------------------------------------------------------------------ Osbert Hood (51)** Trustee and Since June, 2003. Executive Vice President Serves until a successor trustee is elected or earlier retirement or removal. ** Mr. Hood was elected Trustee and Executive Vice President on June 3, 2003. He is an Interested Trustee because he is an officer or director of the Fund's investment adviser and certain of its affiliates. - -------------------------------------------------------------------------------- INDEPENDENT TRUSTEES - -------------------------------------------------------------------------------- Name, Age and Address Position Held With the Fund Term of Office/Length of Service Mary K. Bush (55) Trustee Since 1997. 3509 Woodbine Street, Serves until a successor trustee is Chevy Chase, MD 20815 elected or earlier retirement or removal. - ------------------------------------------------------------------------------------------------------ Richard H. Egdahl, M.D. (76) Trustee Since 1992. Boston University Healthcare Serves until a successor trustee is Entrepreneurship Program, elected or earlier retirement or removal. 53 Bay State Road, Boston, MA 02215 - ------------------------------------------------------------------------------------------------------ 36 - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- Principal Occupation During Past Five Years Other Directorships Held by this Trustee Deputy Chairman and a Director of Pioneer Global Director of Harbor Global Company, Asset Management S.p.A. ("PGAM"); Non-Executive Ltd. Chairman and a Director of Pioneer Investment Management USA Inc. ("PIM-USA"); Chairman and a Director of Pioneer; Director of Pioneer Alternative Investment Management Limited (Dublin); President and a Director of Pioneer Alternative Investment Management (Bermuda) Limited and affiliated funds; President and a Director of Pioneer Funds Distributor, Inc. ("PFD"); President of all of the Pioneer Funds; and Of Counsel (since 2000, partner prior to 2000), Hale and Dorr LLP (counsel to PIM-USA and the Pioneer Funds) - ------------------------------------------------------------------------------------------------------ President and Chief Executive Officer, PIM-USA since None May, 2003 (Director since January, 2001); President and Director of Pioneer since May, 2003; Chairman and Director of Pioneer Investment Management Shareholder Services, Inc. "PIMSS" since May, 2003; Executive Vice President of all of the Pioneer Funds since June, 2003; Executive Vice President and Chief Operating Officer of PIM-USA, November 2000-May 2003; Executive Vice President, Chief Financial Officer and Treasurer, John Hancock Advisers, L.L.C., Boston, MA, November 1999-November 2000; Senior Vice President and Chief Financial Officer, John Hancock Advisers, L.L.C., April 1997-November 1999 - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- Principal Occupation During Past Five Years Other Directorships Held by this Trustee President, Bush International (international financial Director of Brady Corporation advisory firm) (industrial identification and specialty coated material products manufacturer), Millennium Chemicals, Inc. (commodity chemicals), Mortgage Guaranty Insurance Corporation and R.J. Reynolds Tobacco Holdings, Inc. (tobacco) - ------------------------------------------------------------------------------------------------------ Alexander Graham Bell Professor of Health Care None Entrepreneurship, Boston University; Professor of Management, Boston University School of Management; Professor of Public Health, Boston University School of Public Health; Professor of Surgery, Boston University School of Medicine; and University Professor, Boston University - -------------------------------------------------------------------------------- 37 - -------------------------------------------------------------------------------- INDEPENDENT TRUSTEES - -------------------------------------------------------------------------------- Name, Age and Address Position Held With the Fund Term of Office/Length of Service Margaret B.W. Graham (56) Trustee Since 1982. 1001 Sherbrooke Street West, Serves until a successor trustee is Montreal, Quebec, Canada elected or earlier retirement or removal. - ------------------------------------------------------------------------------------------------------- Marguerite A. Piret (55) Trustee Since 1982. One Boston Place, 28th Floor, Serves until a successor trustee is Boston, MA 02108 elected or earlier retirement or removal. - ------------------------------------------------------------------------------------------------------- Stephen K. West (75) Trustee Since 1993. 125 Broad Street, Serves until a successor trustee is New York, NY 10004 elected or earlier retirement or removal. - ------------------------------------------------------------------------------------------------------- John Winthrop (67) Trustee Since 1985. One North Adgers Wharf, Serves until a successor trustee is Charleston, SC 29401 elected or earlier retirement or removal. - -------------------------------------------------------------------------------- FUND OFFICERS - ------------------------------------------------------------------------------- Name and Age Position Held With the Fund Term of Office/Length of Service Dorothy E. Bourassa (55) Secretary Serves at the discretion of board. - ----------------------------------------------------------------------------------------------- David C. Phelan (46) Assistant Secretary Serves at the discretion of board. - ----------------------------------------------------------------------------------------------- Christopher J. Kelly (38) Assistant Secretary Serves at the discretion of board. - ----------------------------------------------------------------------------------------------- Vincent Nave (58) Treasurer Serves at the discretion of board. - ----------------------------------------------------------------------------------------------- Luis I. Presutti (38) Assistant Treasurer Serves at the discretion of board. - ----------------------------------------------------------------------------------------------- Gary Sullivan (45) Assistant Treasurer Serves at the discretion of board. - ----------------------------------------------------------------------------------------------- 38 - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- Other Directorships Held by this Principal Occupation During Past Five Years Trustee Founding Director, The Winthrop Group, Inc. (consulting None firm); Professor of Management, Faculty of Management, McGill University - ----------------------------------------------------------------------------------------------- President and Chief Executive Officer, Newbury, Piret & None Company, Inc. (investment banking firm) - ----------------------------------------------------------------------------------------------- Senior Counsel, Sullivan & Cromwell (law firm) Director, The Swiss Helvetia Fund, Inc. (closed-end investment company) and AMVESCAP PLC (investment managers) - ----------------------------------------------------------------------------------------------- President, John Winthrop & Co., Inc. None (private investment firm) - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- Other Directorships Held by this Principal Occupation During Past Five Years Officer Secretary of PIM-USA: Senior Vice President-Legal of None Pioneer; and Secretary/Clerk of most of PIM-USA's subsidiaries since October 2000; Secretary of all of the Pioneer Funds since September 2003 (Assistant Secretary from November 2000 to September 2003); and Senior Counsel, Assistant Vice President and Director of Compliance of PIM-USA from April 1998 through October 2000 - ---------------------------------------------------------------------------------------------- Partner, Hale and Dorr LLP. Assistant Secretary of all of None Pioneer Funds since September 2003 - ----------------------------------------------------------------------------------------------- Assistant Vice President and Senior Counsel of Pioneer None since July 2002; Vice President and Senior Counsel of BISYS Fund Services, Inc. (April 2001 to June 2002); Senior Vice President and Deputy General Counsel of Funds Distributor, Inc. (July 2000 to April 2001; Vice President and Associate General Counsel from July 1996 to July 2000); Assistant Secretary of all of the Pioneer Funds since September 2003 - ----------------------------------------------------------------------------------------------- Vice President-Fund Accounting, Administration and Custody None Services of Pioneer (Manager from September 1996 to February 1999); and Treasurer of all of the Pioneer Funds (Assistant Treasurer from June 1999 to November 2000) - ----------------------------------------------------------------------------------------------- Assistant Vice President-Fund Accounting, Administration None and Custody Services of Pioneer (Fund Accounting Manager from 1994 to 1999); and Assistant Treasurer of all of the Pioneer Funds since November 2000 - ----------------------------------------------------------------------------------------------- Fund Accounting Manager-Fund Accounting, Administration None and Custody Services of Pioneer; and Assistant Treasurer of all of the Pioneer Funds since May 2002 - ----------------------------------------------------------------------------------------------- 39 - -------------------------------------------------------------------------------- FUND OFFICERS - -------------------------------------------------------------------------------- Name and Age Position Held With the Fund Term of Office/Length of Service Katherine Kim Sullivan (29) Assistant Treasurer Serves at the discretion of board. - ----------------------------------------------------------------------------------------------- 40 - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- Other Directorships Held by this Principal Occupation During Past Five Years Officer Fund Administration Manager - Fund Accounting, None Administration and Custody Services since June 2003; Assistant Vice President - Mutual Fund Operations of State Street Corporation from June 2002 to June 2003 (formerly Deustche Bank Asset Management); Pioneer Fund Accounting, Administration and Custody Services (Fund Accounting Manager from August 1999 to May 2002, Fund Accounting Supervisor from 1997 to July 1999); Assistant Treasurer of all of the Pioneer Funds since September 2003. - ----------------------------------------------------------------------------------------------- 41 - -------------------------------------------------------------------------------- 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. 42 - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- 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.) 43 - -------------------------------------------------------------------------------- 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. 44 - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- 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. 45 - -------------------------------------------------------------------------------- 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 This report must be preceded or accompanied by a current Fund prospectus. For information on other Pioneer mutual funds including charges and expenses, call 800-225-6292 and request a prospectus. Please read it carefully before investing or sending money. [PIONEER LOGO] Pioneer Investment Management, Inc. 60 State Street 14295-00-1103 Boston, Massachusetts 02109 (C) 2003 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. 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. (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. (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. (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. (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. (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. (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. (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. (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. Not applicable; to be answered on annual submissions after December 15, 2003. 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. Filed herewith. (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 November 26, 2003 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 November 26, 2003 By (Signature and Title)* /s/ Vincent Nave Vincent Nave, Treasurer Date November 26, 2003 * Print the name and title of each signing officer under his or her signature.