MassMutual Participation Investors Report for the Three Months Ended March 31, 2007 [LOGO] ADVISER Babson Capital Management LLC 1500 Main Street, PO Box 15189 Springfield, Massachusetts 01115-5189 INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM KPMG LLP Boston, Massachusetts 02110 COUNSEL TO THE TRUST Ropes & Gray LLP Boston, Massachusetts 02110 CUSTODIAN Citibank, N.A. New York, New York 10043 TRANSFER AGENT & REGISTRAR Shareholder Financial Services, Inc. P.O. Box 173673 Denver, Colorado 80217-3673 1-800-647-7374 INTERNET WEBSITE www.babsoncapital.com/mpi [LOGO] MassMutual Participation Investors c/o Babson Capital Management LLC 1500 Main Street, Suite 600 Springfield, Massachusetts 01115 (413) 226-1516 -------------------------------------------------------------------------------- INVESTMENT OBJECTIVE AND POLICY MassMutual Participation Investors (the "Trust") is a closed-end management investment company, first offered to the public in 1988, whose shares are traded on the New York Stock Exchange under the trading symbol "MPV:' The Trust's share price can be found in the financial section of most newspapers as "MassPrt" or "MassMuPrt" under the New York Stock Exchange listings. The Trust's investment objective is to maximize total return by providing a high level of current income, the potential for growth of income, and capital appreciation. The Trust's principal investments are privately placed, below-investment grade, long-term corporate debt obligations purchased directly from their issuers, which tend to be smaller companies. At least half of these investments normally include equity features such as warrants, conversion rights, or other equity features that provide the Trust with the opportunity to realize capital gains. The Trust will also invest in publicly traded debt securities (including high yield securities), again with an emphasis on those with equity features, and in convertible preferred stocks and, subject to certain limitations, readily marketable equity securities. In addition, the Trust may temporarily invest in high quality, readily marketable securities. Babson Capital Management LLC ("Babson Capital") manages the Trust on a total return basis. The Trust distributes substantially all of its net income to shareholders each year. Accordingly, the Trust pays dividends to shareholders quarterly in January, May, August, and November. All registered shareholders are automatically enrolled in the Dividend Reinvestment and Cash Purchase Plan unless cash distributions are requested. FORM N-Q The Trust files its complete schedule of portfolio holdings with the U.S. Securities and Exchange Commission ("SEC") for the first and third quarters of each fiscal year on Form N-Q. This information is available (i) on the SEC's website at http://www.sec.gov; and (ii) at the SEC's Public Reference Room in Washington, DC (which information on their operation may be obtained by calling 1-800-SEC-0330). A complete schedule of portfolio holdings as of each quarter-end is available upon request by calling, toll-free, 866-399-1516. PROXY VOTING POLICIES & Procedures; PROXY VOTING RECORD The Trustees of the Trust have delegated proxy voting responsibilities relating to the voting of securities held by the Trust to Babson Capital. A description of Babson Capital's proxy voting policies and procedures is available (1) without charge, upon request, by calling, toll-free 866-399-1516; (2) on the Trust's website: ht:// www.babsoncapital.com/mpv; and (3) on the SEC's website: http://www.sec.gov. Information regarding how the Trust voted proxies relating to portfolio securities during the most recent 12-month period ended June 30 is available (1) on the Trust's website: http://www. babsoncapital.com/mpv; and (2) on the SEC's website: http://www.sec.gov. MPV Listed NYSE TO OUR SHAREHOLDERS April 30, 2007 We are pleased to present the March 31, 2007 Quarterly Report of MassMutual Participation Investors (the "Trust"). At the Trust's Annual Shareholders Meeting, which was held on April 27, 2007, shareholders elected Donald E. Benson, Donald Glickman, and Robert E. Joyal as Trustees, each for a three-year term; William J. Barrett as Trustee, for a two-year term; and Michael H. Brown as Trustee, for a one-year term. The Board of Trustees declared a quarterly dividend of 25 cents per share, payable on May 18, 2007 to shareholders of record on May 7, 2007. The Trust had previously paid a 24 cent per share dividend for the preceding quarter (plus a special year-end dividend of 23 cents per share). U.S. equity markets, as measured by several broad market indices, posted mixed returns for the quarter. Large stocks, as approximated by the Dow Jones Industrial Average, decreased 0.33%. Smaller stocks, as approximated by the Russell 2000 Index, increased 1.95%. U.S. fixed income markets, as measured by several broad market indices increased during the quarter. The Lehman Brothers Government/Credit Index increased 1.47% for the quarter and the Lehman Brothers U.S. Corporate High Yield Index increased 2.64% for the quarter. During the quarter ended March 31, 2007, net assets of the Trust increased to $130,015,397 or $13.22 per share compared to $126,515,013 or $12.90 per share on December 31, 2006, which translates into a 2.48% return for the quarter, based on the change in the Trust's net assets assuming the reinvestment of all dividends. Long term, the Trust returned 15.08%, 18.26% and 14.27% for the 1-, 5- and 10-year time periods, respectively, based on the change in the Trust's net assets assuming the reinvestment of all dividends. The Trust earned 25 cents per share of net investment income for the quarter, compared to 39 cents per share in the previous quarter, of which 12 cents per share was from nonrecurring items. During the quarter, the Trust made private placement investments in five new issuers totaling approximately $5.4 million. The five new issuers the Trust invested in were Aero Holdings, Inc., Connecticut Electric, Inc., Hawk Precision Components Group, Inc., K W P I Holdings Corporation and Total Equipment & Service, Inc. The weighted average coupon of these investments was 11.87%. (A brief description of these investments can be found in the Schedule of Consolidated Investments.) The market price per share of the Trust as of March 31, 2007 was $16.21, which equates to a 22.6% premium over the March 31, 2007 NAV per share. The Trust's average quarter-end premium for the 3, 5 and 10-year periods was 13.5%, 11.1% and 5.1%, respectively. Thank you for your continued interest in and support of MassMutual Participation Investors. Sincerely, /s/ Clifford M. Noreen Clifford M. Noreen President -------------------------------------------------------------------------------- [PIE CHART APPEARS HERE] Portfolio Composition as of 03/31/07* Public High Yield Debt 21.8% Private High Yield Debt 51.8% Private Investment Grade Debt 4.6% Private/Restricted Equity 17.3% Cash & Short Term Investments 4.5% *Based on market value of total investments -------------------------------------------------------------------------------- 1 CONSOLIDATED STATEMENT OF MASSMUTUAL PARTICIPATION INVESTORS ASSETS AND LIABILITIES March 31, 2007 (Unaudited) ASSETS: Investments (See Consolidated Schedule of Investments) Corporate restricted securities at fair value (Cost - $102,419,831) $ 103,442,026 Corporate public securities at market value (Cost - $29,912,867) 30,540,492 Short-term securities at amortized cost 5,331,142 -------------- 139,313,660 Cash 946,839 Interest and dividends receivable 2,849,985 Receivable for investments sold 4,118 Other assets 18,906 -------------- TOTAL ASSETS $ 143,133,508 -------------- LIABILITIES: Payable for investments purchased $ 100,000 Investment advisory fee payable 292,535 Note payable 12,000,000 Interest payable 272,180 Accrued expenses 94,087 Accrued taxes payable 359,309 -------------- TOTAL LIABILITIES 13,118,111 -------------- TOTAL NET ASSETS $ 130,015,397 ============== NET ASSETS: Common shares, par value $.01 per share; an unlimited number authorized $ 98,317 Additional paid-in capital 91,344,494 Retained net realized gain on investments, prior years 32,187,873 Undistributed net investment income 3,467,704 Accumulated net realized gain on investments 1,519,591 Net unrealized appreciation of investments 1,397,418 -------------- TOTAL NET ASSETS $ 130,015,397 ============== COMMON SHARES ISSUED AND OUTSTANDING 9,831,693 ============== NET ASSET VALUE PER SHARE $ 13.22 ============== SEE NOTES TO CONSOLIDATED FINANCIAL STATEMENTS. ------------------------------------------------------------------------------------------- 2 CONSOLIDATED STATEMENT OF OPERATIONS MASSMUTUAL PARTICIPATION INVESTORS For the three months ended March 31, 2007 (Unaudited) INVESTMENT INCOME: Interest $ 3,002,667 Dividends 59,834 Other 3,031 -------------- TOTAL INVESTMENT INCOME 3,065,532 -------------- EXPENSES: Investment advisory fees 292,535 Interest 183,247 Professional fees 35,700 Trustees' fees and expenses 30,000 Reports to shareholders 22,500 Transfer agent/registrar's expenses 3,500 Other 58,994 -------------- TOTAL EXPENSES 626,476 -------------- INVESTMENT INCOME - NET 2,439,056 -------------- NET REALIZED AND UNREALIZED GAIN (LOSS) ON INVESTMENTS: Net realized gain on investments 1,412,221 Net change in unrealized appreciation of investments before taxes (880,467) Net change in deferred income tax expense 131,824 -------------- Net change in unrealized appreciation of investments (748,643) NET GAIN ON INVESTMENTS 663,578 -------------- NET INCREASE IN NET ASSETS RESULTING FROM OPERATIONS $ 3,102,634 ============== SEE NOTES TO CONSOLIDATED FINANCIAL STATEMENTS. ------------------------------------------------------------------------------------------- 3 CONSOLIDATED STATEMENT OF CASH FLOWS MASSMUTUAL PARTICIPATION INVESTORS For the three months ended March 31, 2007 (Unaudited) NET DECREASE IN CASH: Cash flows from operating activities: Interest, dividends and other received $ 3,018,337 Operating expenses paid (465,097) Income taxes paid (3,468,168) -------------- NET CASH USED FOR OPERATING ACTIVITIES (914,928) -------------- Cash flows from investing activities: Purchases/Proceeds/Maturities from short-term portfolio securities, net 1,599,291 Purchases of portfolio securities (9,925,486) Proceeds from disposition of portfolio securities 11,754,964 -------------- NET CASH PROVIDED BY INVESTING ACTIVITIES 3,428,769 -------------- NET CASH PROVIDED BY OPERATING AND INVESTING ACTIVITIES 2,513,841 -------------- Cash flows from financing activities: Cash dividends paid from net investment income (4,511,925) Cash dividends paid from net realized gain on investments (96,562) Receipts for shares issued on reinvestment of dividends 397,750 -------------- NET CASH USED FOR FINANCING ACTIVITIES (4,210,737) -------------- NET DECREASE IN CASH (1,696,896) Cash - beginning of year 2,643,735 -------------- CASH - END OF PERIOD $ 946,839 ============== Reconciliation of net increase in net assets to net cash provided by operating and investing activities: NET INCREASE IN NET ASSETS RESULTING FROM OPERATIONS $ 3,102,634 -------------- Decrease in investments 2,384,417 Decrease in interest and dividends receivable 150,841 Decrease in receivable for investments sold 252,374 Increase in other assets (18,906) Increase in payable for investments purchased 100,000 Increase in investment advisory fee payable 7,876 Increase in interest payable 183,247 Decrease in accrued expenses (48,650) Decrease in accrued taxes payable (3,599,992) -------------- TOTAL ADJUSTMENTS TO NET ASSETS FROM OPERATIONS (588,793) -------------- NET CASH PROVIDED BY OPERATING AND INVESTING ACTIVITIES $ 2,513,841 ============== SEE NOTES TO CONSOLIDATED FINANCIAL STATEMENTS. ------------------------------------------------------------------------------------------- 4 CONSOLIDATED STATEMENTS OF MASSMUTUAL PARTICIPATION INVESTORS CHANGES IN NET ASSETS For the three months ended For the 03/31/2007 year ended (Unaudited) 12/31/2006 -------------- -------------- INCREASE IN NET ASSETS: OPERATIONS: Investment income - net $ 2,439,056 $ 10,728,662 Net realized gain on investments 1,412,221 6,733,116 Net change in unrealized appreciation of investments (748,643) 814,564 -------------- -------------- Net increase in net assets resulting from operations 3,102,634 18,276,342 Increase from common shares issued on reinvestment of dividends Common shares issued (2007 - 26,411; 2006 - 61,052) 397,750 867,979 Dividends to shareholders from: Net investment income (2006 - $1.18 per share) -- (11,551,712) Net realized gains on investments (2006 - $0.01 per share) -- (96,562) -------------- -------------- TOTAL INCREASE IN NET ASSETS 3,500,384 7,496,047 NET ASSETS, BEGINNING OF YEAR 126,515,013 119,018,966 -------------- -------------- NET ASSETS, END OF PERIOD (including undistributed net investment income of $3,467,704 and $1,028,648, respectively) $ 130,015,397 $ 126,515,013 ============== ============== SEE NOTES TO CONSOLIDATED FINANCIAL STATEMENTS. --------------------------------------------------------------------------------------------------------------- 5 CONSOLIDATED SELECTED FINANCIAL HIGHLIGHTS MASSMUTUAL PARTICIPATION INVESTORS Selected data for each share of beneficial interest outstanding: For the three months ended For the years ended December 31, 03/31/2007 ---------------------------------------------------------------------- (Unaudited) 2006 2005 2004 2003 2002 ---------- ---------- ---------- ---------- ---------- ---------- Net asset value: Beginning of year $ 12.90 $ 12.21 $ 11.13 $ 9.84 $ 8.78 $ 9.12 ---------- ---------- ---------- ---------- ---------- ---------- Net investment income (a) 0.25 1.10 0.99 1.00 0.80 0.87 Net realized and unrealized gain (loss) on investments 0.07 0.77 1.09(b) 1.36 1.21 (0.35) ---------- ---------- ---------- ---------- ---------- ---------- Total from investment operations 0.32 1.87 2.08 2.36 2.01 0.52 ---------- ---------- ---------- ---------- ---------- ---------- Dividends from net investment income to common shareholders -- (1.18) (1.01) (1.10) (0.96) (0.86) Dividends from net realized gain on investments to common shareholders -- (0.01) -- -- -- -- Increase from dividends reinvested -- 0.01 0.01 0.03 0.01 -- ---------- ---------- ---------- ---------- ---------- ---------- Total dividends -- (1.18) (1.00) (1.07) (0.95) (0.86) ---------- ---------- ---------- ---------- ---------- ---------- Net asset value: End of period/year $ 13.22 $ 12.90 $ 12.21 $ 11.13 $ 9.84 $ 8.78 ---------- ---------- ---------- ---------- ---------- ---------- Per share market value: End of period/year $ 16.21 $ 14.70 $ 14.05 $ 13.31 $ 11.65 $ 9.40 ========== ========== ========== ========== ========== ========== Total investment return Market value 10.27% 16.81% 17.25% 25.77% 35.50% 12.58% Net asset value (c) 2.48% 18.64% 22.51% 25.14% 23.72% 5.70% Net assets (in millions): End of period/year $ 130.02 $ 126.52 $ 119.02 $ 107.61 $ 94.40 $ 83.59 Ratio of operating expenses to average net assets 1.40%(d) 1.17% 1.45% 1.63% 1.65% 1.27% Ratio of interest expense to average net assets 0.58%(d) 0.57% 0.80% 0.89% 0.97% 1.08% Ratio of total expenses before custodian reduction to average net assets 1.98%(d) 1.78% 2.28% 2.52% 2.62% 2.35% Ratio of net expenses after custodian reduction to average net assets 1.98%(d) 1.74% 2.25% 2.52% 2.62% 2.35% Ratio of net investment income to average net assets 7.71%(d) 8.43% 8.45% 9.60% 8.55% 9.42% Portfolio turnover 7.49% 34.14% 31.50% 51.25% 55.08% 35.32% Senior securities: Total principal amount (in millions) $ 12 $ 12 $ 12 $ 22.5 $ 22.5 $ 22.5 Asset coverage per $1,000 of indebtedness $ 11,835 $ 11,543 $ 10,918 $ 5,783 $ 5,195 $ 4,715 (a) Calculated using average shares. (b) Amount includes $0.10 per share in litigation proceeds. (c) Net asset value return represents portfolio returns based on change in the Trust's net asset value assuming the reinvestment of all dividends and distributions which differs from the total investment return based on the Trust's market value due to the difference between the Trust's net asset value and the market value of its shares outstanding; past performance is no guarantee of future results. (d) Annualized. SEE NOTES TO CONSOLIDATED FINANCIAL STATEMENTS. ----------------------------------------------------------------------------------------------------------------------------------- 6 ITEM 1. SCHEDULE OF INVESTMENTS. CONSOLIDATED SCHEDULE OF INVESTMENTS MASSMUTUAL PARTICIPATION INVESTORS March 31, 2007 (Unaudited) Shares, Units, Warrants, Ownership or Acquisition CORPORATE RESTRICTED SECURITIES - 79.56%:(A) Principal Amount Date Cost Fair Value -------------- -------- ------------ ------------ Private Placement Investments - 74.93% A T I ACQUISITION COMPANY A for-profit post-secondary school serving students in Texas, Florida and Arizona. 12% Senior Subordinated Note due 2012 $ 1,125,000 04/08/04 $ 1,125,000 $ 1,099,282 Warrant, exercisable until 2012, to purchase common stock at $.02 per share (B) 1,230 shs. 04/08/04 -- 12 Warrant, exercisable until 2012, to purchase preferred stock at $.01 per share (B) 33,505 shs. 03/23/06 33,860 33,860 ------------ ------------ 1,158,860 1,133,154 ------------ ------------ ADORN, INC. A manufacturer of wall panels, cabinets, moldings and countertops for houses and recreational vehicles. 12.5% Subordinated Note due 2012 $ 775,862 02/29/00 738,191 775,862 Warrant, exercisable until 2012, to purchase common stock at $.02 per share (B) 192 shs. 02/29/00 162,931 251,473 ------------ ------------ 901,122 1,027,335 ------------ ------------ AERO HOLDINGS, INC. A provider of geospatial services to corporate and government clients. 10.5% Senior Secured Term Note due 2014 $ 930,000 03/09/07 916,050 911,694 14% Senior Subordinated Note due 2015 $ 720,000 03/09/07 641,870 704,563 Common Stock (B) 150,000 shs. 03/09/07 150,000 142,500 Warrant, exercisable until 2015, to purchase common stock at $.01 per share (B) 37,780 shs. 03/09/07 63,730 378 ------------ ------------ 1,771,650 1,759,135 ------------ ------------ AMERCABLE, INC. A manufacturer of electric power, instrumentation and control cables, primarily for the mining and oil and gas industries. 12% Senior Subordinated Note due 2013 $ 583,333 04/08/05 553,959 595,000 Limited Partnership Interest (B) 0.19% int. 04/07/05 41,667 109,940 Warrant, exercisable until 2013, to purchase common stock at $.01 per share (B) 66 shs. 04/08/05 64,833 174,395 ------------ ------------ 660,459 879,335 ------------ ------------ AMERICAN HOSPICE MANAGEMENT HOLDING LLC A for-profit hospice care provider in the United States. 12% Senior Subordinated Note due 2010 $ 1,125,000 01/22/04 1,033,451 1,126,330 Preferred Class A Unit (B) 1,706 uts. * 170,600 187,660 Common Class B Unit (B) 16,100 uts. 01/22/04 1 32,474 Common Class D Unit (B) 3,690 uts. 09/12/06 -- 7,443 ------------ ------------ 1,204,052 1,353,907 ------------ ------------ ARROW TRU-LINE HOLDINGS, INC. A manufacturer of hardware for residential and commercial overhead garage doors in North America. 12% Senior Subordinated Note due 2012 $ 861,702 05/18/05 813,212 878,936 Common Stock (B) 263 shs. 05/18/05 263,298 226,092 Warrant, exercisable until 2012, to purchase common stock at $.01 per share (B) 69 shs. 05/18/05 59,362 59,275 ------------ ------------ 1,135,872 1,164,303 ------------ ------------ *01/22/04 and 09/12/06. ---------------------------------------------------------------------------------------------------------------------------------- 7 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL PARTICIPATION INVESTORS March 31, 2007 (Unaudited) Shares, Units, Warrants, Ownership or Acquisition CORPORATE RESTRICTED SECURITIES:(A)(Continued) Principal Amount Date Cost Fair Value -------------- -------- ------------ ------------ AUGUSTA SPORTSWEAR HOLDING CO. A manufacturer and distributor of athletic apparel, activewear and team uniforms. 12% Senior Subordinated Note due 2012 $ 893,000 12/31/04 $ 841,364 $ 919,790 Common Stock (B) 275 shs. * 275,108 578,480 Warrant, exercisable until 2012, to purchase common stock at $.01 per share (B) 73 shs. 12/31/04 63,254 153,057 ------------ ------------ 1,179,726 1,651,327 ------------ ------------ BETA BRANDS LTD. A manufacturer of hard candy and chocolate-coated products sold primarily to the Canadian market. 5% Promissory Note due 2009 (B) $ 96,698 03/31/04 96,698 -- Warrant, exercisable until 2009, to purchase common stock at $.01 per share (B) 2,421 shs. 03/31/04 1 -- ------------ ------------ 96,699 -- ------------ ------------ BRAVO SPORTS HOLDING CORPORATION A designer and marketer of niche branded consumer products including canopies, trampolines, in-line skates, skateboards, and urethane wheels. 12.5% Senior Subordinated Note due 2014 $ 1,207,902 06/30/06 1,137,677 1,148,882 Preferred Stock Class A (B) 465 shs. 06/30/06 141,946 127,752 Common Stock (B) 1 sh. 06/30/06 152 137 Warrant, exercisable until 2014, to purchase common stock at $.01 per share (B) 164 shs. 06/30/06 48,760 2 ------------ ------------ 1,328,535 1,276,773 ------------ ------------ CAINS FOODS, L.P. A producer of mayonnaise and sauce products for both the retail and food service markets. Limited Partnership Interest (B) 1.81% int. 09/29/95 22,519 154,384 ------------ ------------ CAPESUCCESS LLC A provider of diversified staffing services. Preferred Membership Interests (B) 806 uts. 04/29/00 3,598 180 Common Membership Interests (B) 10,421 uts. 04/29/00 46,706 2,332 ------------ ------------ 50,304 2,512 ------------ ------------ CAPITAL SPECIALTY PLASTICS, INC. A producer of desiccant strips used for packaging pharmaceutical products. Common Stock (B) 55 shs. ** 252 223,573 ------------ ------------ COEUR, INC. A producer of proprietary, disposable power injection syringes. 8.75% Senior Secured Term Note due 2010 $ 264,493 04/30/03 264,493 268,273 11.5% Senior Subordinated Note due 2011 $ 242,754 04/30/03 227,826 244,777 Common Stock (B) 72,464 shs. 04/30/03 72,463 183,036 Warrant, exercisable until 2010, to purchase common stock at $.01 per share (B) 50,099 shs. 04/30/03 23,317 126,545 ------------ ------------ 588,099 822,631 ------------ ------------ *12/31/04, 03/31/05 and 05/02/06. **12/30/97 and 05/29/99. ---------------------------------------------------------------------------------------------------------------------------------- 8 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL PARTICIPATION INVESTORS March 31, 2007 (Unaudited) Shares, Units, Warrants, Ownership or Acquisition CORPORATE RESTRICTED SECURITIES:(A)(Continued) Principal Amount Date Cost Fair Value -------------- -------- ------------ ------------ COINING CORPORATION OF AMERICA LLC A manufacturer of close tolerance parts and metal stampings. 10.6% Senior Secured Revolving Credit Facility due 2007 (C) $ 12,346 01/07/02 $ 12,346 $ 12,315 10.6% Senior Secured Tranche A Note due 2007 (C) $ 372,493 06/26/01 372,493 371,084 13% Senior Secured Tranche B Note due 2008 $ 370,370 06/26/01 370,370 370,370 Limited Partnership Interest (B) 3.65% int. 06/26/01 185,185 582,364 Warrant, exercisable until 2008, to purchase common stock at $.01 per share (B) 61,163 shs. 06/26/01 45,370 192,344 ------------ ------------ 985,764 1,528,477 ------------ ------------ CONNECTICUT ELECTRIC, INC. A supplier and distributor of electrical products sold into the retail and wholesale markets. 12% Senior Subordinated Note due 2014 $ 1,267,387 01/12/07 1,182,283 1,250,573 Limited Liability Company Unit Class A (B) 82,616 uts. 01/12/07 82,613 78,482 Limited Liability Company Unit Class C (B) 59,756 uts. 01/12/07 59,756 56,769 ------------ ------------ 1,324,652 1,385,824 ------------ ------------ CONNOR SPORT COURT INTERNATIONAL, INC. A designer and manufacturer of outdoor and indoor synthetic sports flooring and other temporary flooring products. 12% Senior Subordinated Note due 2012 (D) $ 1,059,417 * 974,588 529,709 Limited Partnership Interest (B) 4.43% int. ** 103,135 -- Warrant, exercisable until 2012, to purchase common stock at $.01 per share (B) 92 shs. * 84,829 -- ------------ ------------ 1,162,552 529,709 ------------ ------------ CONSOLIDATED FOUNDRIES HOLDINGS A manufacturer of engineered cast metal components for the global aerospace and defense industries. 12% Senior Subordinated Note due 2013 $ 1,157,143 06/15/05 1,111,584 1,177,746 Common Stock (B) 269 shs. *** 278,521 350,174 Warrant, exercisable until 2013, to purchase common stock at $.01 per share (B) 54 shs. 06/15/05 53,295 70,823 ------------ ------------ 1,443,400 1,598,743 ------------ ------------ COREPHARMA LLC A manufacturer of oral dose generic pharmaceuticals targeted at niche applications. 12% Senior Subordinated Note due 2013 $ 1,350,000 08/04/05 1,286,031 1,363,500 Warrant, exercisable until 2013, to purchase common stock at $.01 per share (B) 10 shs. 08/04/05 72,617 36,912 ------------ ------------ 1,358,648 1,400,412 ------------ ------------ *08/12/04 and 01/18/05. **08/12/04 and 01/14/05. ***06/15/05 and 05/22/06. ---------------------------------------------------------------------------------------------------------------------------------- 9 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL PARTICIPATION INVESTORS March 31, 2007 (Unaudited) Shares, Units, Warrants, Ownership or Acquisition CORPORATE RESTRICTED SECURITIES:(A)(Continued) Principal Amount Date Cost Fair Value -------------- -------- ------------ ------------ DAVIS-STANDARD LLC A manufacturer, assembler, and installer of a broad range of capital equipment that is used in the extrusion, conversion, and processing of plastic materials. 12% Senior Subordinated Note due 2014 $ 978,261 10/30/06 $ 915,720 $ 985,957 Limited Partnership Interest (B) 371,739 uts. 10/30/06 371,739 353,152 Warrant, exercisable until 2014, to purchase preferred stock at $.01 per share (B) 26 shs. 10/30/06 26,380 -- Warrant, exercisable until 2014, to purchase common stock at $.01 per share (B) 18 shs. 10/30/06 18,000 -- ------------ ------------ 1,331,839 1,339,109 ------------ ------------ DELTACOM, INC. A provider of integrated communications services in the southeastern United States. 13.88% Senior Secured Note due 2009 (C) $ 1,190,609 07/26/05 1,167,097 1,222,362 17.38% Senior Secured Note due 2009 (C) $ 194,982 07/26/05 172,174 194,007 Warrant, exercisable until 2009, to purchase convertible preferred stock at $.03 per share (B) 54,468 shs. 07/26/05 18,156 150,876 ------------ ------------ 1,357,427 1,567,245 ------------ ------------ DEXTER MAGNETICS TECHNOLOGIES, INC. A designer, fabricator, assembler and distributor of industrial magnets and subassemblies in North America and Europe. Common Stock (B) 310 shs. 07/19/01 185,869 502,223 Warrant, exercisable until 2007, to purchase common stock at $.01 per share 157 shs. 07/19/01 69,872 254,549 ------------ ------------ 255,741 756,772 ------------ ------------ DIRECTED ELECTRONICS, INC. A designer and distributor of brand name automotive security systems, audio products and installation accessories. Common Stock (B) 195,118 shs. * 982,868 1,634,628 Limited Partnership Interest (B) 4.61% int. ** -- 205,170 ------------ ------------ 982,868 1,839,798 ------------ ------------ DIVERSCO, INC./DHI HOLDINGS, INC. A contract provider of janitorial and equipment maintenance services and temporary production labor to industrial customers. Membership Interests of MM/Lincap Diversco Investments Ltd. LLC (B) 13.57% int. 08/27/98 366,495 -- Preferred Stock (B) 1,639 shs. 12/14/01 1,392,067 -- Warrants, exercisable until 2011, to purchase common stock of DHI Holdings, Inc. at $.01 per share (B) 6,676 shs. *** 201,655 -- ------------ ------------ 1,960,217 -- ------------ ------------ *12/19/05 and 06/17/06. **12/22/99 and 09/14/05. ***10/24/96 and 08/28/98. ---------------------------------------------------------------------------------------------------------------------------------- 10 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL PARTICIPATION INVESTORS March 31, 2007 (Unaudited) Shares, Units, Warrants, Ownership or Acquisition CORPORATE RESTRICTED SECURITIES:(A)(Continued) Principal Amount Date Cost Fair Value -------------- -------- ------------ ------------ DUNCAN SYSTEMS, INC. A distributor of windshields and side glass for the recreational vehicle market. 10% Senior Secured Term Note due 2013 $ 308,571 11/01/06 $ 303,942 $ 302,606 13% Senior Subordinated Note due 2014 $ 488,572 11/01/06 435,407 477,644 Common Stock (B) 102,857 shs. 11/01/06 102,857 97,714 Warrant, exercisable until 2014, to purchase common stock at $.01 per share (B) 32,294 shs. 11/01/06 44,663 323 ------------ ------------ 886,869 878,287 ------------ ------------ DWYER GROUP, INC. A franchiser of a variety of home repair services. Common Stock (B) 3,656 shs. * 365,600 469,116 Warrant, exercisable until 2011, to purchase common stock at $.01 per share (B) 1,077 shs. 10/30/03 98,719 138,144 ------------ ------------ 464,319 607,260 ------------ ------------ E X C ACQUISITION CORPORATION A manufacturer of pre-filled syringes and pump systems used for intravenous drug delivery. Warrant, exercisable until 2014, to purchase common stock at $.01 per share (B) 11 shs. 06/28/04 40,875 81,825 ------------ ------------ EAGLE PACK PET FOODS, INC. A manufacturer of premium pet food sold through independent pet stores. 12% Senior Subordinated Note due 2011 $ 803,572 ** 783,942 811,608 Warrant, exercisable until 2011, to purchase common stock at $.02 per share (B) 2,163 shs. 09/24/04 20,893 47,867 ------------ ------------ 804,835 859,475 ------------ ------------ ENZYMATIC THERAPY, INC. A manufacturer and distributor of branded natural medicines and nutritional supplements. Limited Partnership Interest (B) 0.70% int. 03/30/00 281,250 33,750 Warrant, exercisable until 2009, to purchase common stock at $.01 per share (B) 15,415 shs. 03/30/00 135,000 22,500 ------------ ------------ 416,250 56,250 ------------ ------------ EVANS CONSOLES, INC. A designer and manufacturer of consoles and control center systems. Common Stock 45,000 shs. 05/06/04 6 -- ------------ ------------ F H S HOLDINGS LLC A national provider of customized disease management services to large self-insured employers. 12% Senior Subordinated Note due 2014 $ 1,265,625 06/01/06 1,179,795 1,282,880 Preferred Unit (B) 84 uts. 06/01/06 83,530 75,177 Common Unit (B) 844 uts. 06/01/06 844 759 Common Unit Class B (B) 734 shs. 06/01/06 64,779 58,301 ------------ ------------ 1,328,948 1,417,117 ------------ ------------ *10/30/03 and 01/02/04. **09/24/04 and 4/20/06. ---------------------------------------------------------------------------------------------------------------------------------- 11 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL PARTICIPATION INVESTORS March 31, 2007 (Unaudited) Shares, Units, Warrants, Ownership or Acquisition CORPORATE RESTRICTED SECURITIES:(A)(Continued) Principal Amount Date Cost Fair Value -------------- -------- ------------ ------------ FLUTES, INC. An independent manufacturer of micro fluted corrugated sheet material for the food and consumer products packaging industries. 10% Senior Secured Term Note due 2013 $ 524,791 04/13/06 $ 516,919 $ 527,605 14% Senior Subordinated Note due 2014 $ 315,599 04/13/06 285,069 319,274 Common Stock (B) 62,535 shs. 04/13/06 62,535 56,282 Warrant, exercisable until 2014, to purchase common stock at $.01 per share (B) 17,680 shs. 04/13/06 27,676 177 ------------ ------------ 892,199 903,338 ------------ ------------ FOWLER HOLDING, INC. A provider of site development services to residential homebuilders and developers in the Raleigh/Durham region of North Carolina. 12% Senior Subordinated Note due 2013 $ 1,252,174 02/03/06 1,134,673 1,234,809 Common Stock (B) 98 shs. 02/03/06 97,826 51,430 Warrant, exercisable until 2013, to purchase common stock at $.01 per share (B) 135 shs. 02/03/06 110,348 70,750 ------------ ------------ 1,342,847 1,356,989 ------------ ------------ FUEL SYSTEMS HOLDING CORPORATION An independent North American supplier of fuel tanks for a wide variety of commercial vehicles. 12% Senior Subordinated Note due 2014 $ 1,237,500 01/31/06 1,155,114 1,255,805 Common Stock (B) 112,500 shs. 01/31/06 112,500 194,901 Warrant, exercisable until 2016, to purchase common stock at $.01 per share (B) 73,275 shs. 01/31/06 63,113 126,945 ------------ ------------ 1,330,727 1,577,651 ------------ ------------ H M HOLDING COMPANY A designer, manufacturer, and importer of promotional and wood furniture. 12% Senior Subordinated Note due 2013 $ 1,170,000 02/10/06 1,089,701 1,083,654 Common Stock (B) 180 shs. 02/10/06 180,000 144,000 Warrant, exercisable until 2013, to purchase common stock at $.01 per share (B) 67 shs. 02/10/06 61,875 1 ------------ ------------ 1,331,576 1,227,655 ------------ ------------ HAWK PRECISION COMPONENTS GROUP, INC. A manufacturer of powder metal and metal injection molded precision components used in industrial, consumer, and other applications. 12% Senior Subordinated Note due 2014 $ 810,000 02/02/07 745,713 789,938 Limited Partnership Interest of Saw Mill PCG Partners LLC (B) 540 uts. 02/02/07 540,000 513,000 Warrant, exercisable until 2014, to purchase common stock at $.01 per share (B) 48 shs. 02/02/07 48,087 -- ------------ ------------ 1,333,800 1,302,938 ------------ ------------ HIGHGATE CAPITAL LLC An acquirer of controlling or substantial interests in manufacturing and marketing entities. Series A Preferred Units (B) 0.30% int. 07/21/94 91,867 -- ------------ ------------ ---------------------------------------------------------------------------------------------------------------------------------- 12 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL PARTICIPATION INVESTORS March 31, 2007 (Unaudited) Shares, Units, Warrants, Ownership or Acquisition CORPORATE RESTRICTED SECURITIES:(A)(Continued) Principal Amount Date Cost Fair Value -------------- -------- ------------ ------------ HOME DECOR HOLDING COMPANY A designer, manufacturer and marketer of framed art and wall decor products. 12.5% Senior Subordinated Note due 2012 $ 1,081,731 * $ 995,849 $ 1,092,811 Common Stock (B) 33 shs. * 33,216 45,892 Warrant, exercisable until 2012, to purchase common stock at $.02 per share (B) 106 shs. * 105,618 145,909 ------------ ------------ 1,134,683 1,284,612 ------------ ------------ INTEGRATION TECHNOLOGY SYSTEMS, INC. A manufacturer of steel protective computer and network systems for the industrial and office environments. 12% Senior Secured Note due 2008 $ 949,004 03/01/04 938,546 711,753 Common Stock (B) 130 shs. 06/01/00 149,500 -- ------------ ------------ 1,088,046 711,753 ------------ ------------ JASON, INC. A diversified manufacturing company serving various industrial markets. 13% Senior Subordinated Note due 2008 $ 510,187 08/04/00 491,808 505,085 14% Cumulative Redeemable Preferred Stock Series A (B) 153 shs. 08/04/00 153,119 148,525 Limited Partnership Interest of Saw Mill Capital Fund II, L.P. (B) 1.30% int. 08/03/00 469,245 240,606 Warrants, exercisable until 2008 and 2009, to purchase common stock at $.01 per share (B) 26,931 shs. 08/04/00 61,101 48,320 ------------ ------------ 1,175,273 942,536 ------------ ------------ JUSTRITE MANUFACTURING ACQUISITION CO. A manufacturer of safety products such as storage cabinets and containers. 12% Senior Subordinated Note due 2011 $ 843,750 12/15/04 801,837 852,188 Warrant, exercisable until 2011, to purchase common stock at $.01 per share (B) 594 shs. 12/15/04 53,528 62,267 ------------ ------------ 855,365 914,455 ------------ ------------ K N B HOLDINGS CORPORATION A designer, manufacturer and marketer of products for the custom framing market. 13.5% Senior Subordinated Note due 2013 $ 1,290,490 05/25/06 1,229,884 1,285,748 Common Stock (B) 71,053 shs. 05/25/06 71,053 63,948 Warrant, exercisable until 2013, to purchase common stock at $.01 per share (B) 43,600 shs. 05/25/06 37,871 436 ------------ ------------ 1,338,808 1,350,132 ------------ ------------ K W P I HOLDINGS CORPORATION A manufacturer and distributor of vinyl windows and patio doors througout the northwestern United States. 12% Senior Subordinated Note due 2014 $ 1,227,000 03/14/07 1,116,570 1,210,115 Common Stock (B) 123 shs. 03/13/07 123,000 116,850 Warrant, excercisable until 2017, to purchase common stock at $.01 per share (B) 89 shs. 03/14/07 85,890 1 ------------ ------------ 1,325,460 1,326,966 ------------ ------------ *06/30/04 and 08/19/04. ---------------------------------------------------------------------------------------------------------------------------------- 13 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL PARTICIPATION INVESTORS March 31, 2007 (Unaudited) Shares, Units, Warrants, Ownership or Acquisition CORPORATE RESTRICTED SECURITIES:(A)(Continued) Principal Amount Date Cost Fair Value -------------- -------- ------------ ------------ KEEPSAKE QUILTING, INC. A seller of quilting fabrics, books, patterns, kits and notions to consumers. 8.35% Senior Secured Revolving Note due 2007 (C) $ 83,869 06/16/00 $ 83,869 $ 84,432 8.35% Senior Secured Tranche A Note due 2007 (C) $ 39,314 07/19/00 39,314 39,242 12% Senior Secured Tranche B Note due 2008 $ 314,509 06/16/00 308,711 316,088 Limited Partnership Interest of Riverside XVI Holding Company, L.P. (B) 3.02% int. 06/12/00 190,563 297,504 Warrant, exercisable until 2008, to purchase common stock at $.01 per share (B) 633 shs. 06/12/00 26,209 99,726 ------------ ------------ 648,666 836,992 ------------ ------------ KELE AND ASSOCIATES, INC. A distributor of building automation control products. 12% Senior Subordinated Note due 2012 $ 969,643 02/27/04 900,257 979,339 Preferred Stock (B) 12 shs. 11/24/04 237,794 241,915 Common Stock (B) 6 shs. 02/27/04 6,814 156,092 Warrant, exercisable until 2012, to purchase common stock at $.02 per share (B) 6 shs. 02/27/04 4,124 142,761 ------------ ------------ 1,148,989 1,520,107 ------------ ------------ LIH INVESTORS, L.P. A manufacturer and marketer of a broad line of external accessories for new and used sport utility vehicles, trucks and vans. 12.5% Senior Subordinated Note due 2008 (D) $ 2,036,000 * 1,899,714 1,018,000 Common Stock (B) 3,057 shs. * 213,998 -- Warrant, exercisable until 2008, to purchase common stock at $.11 per share (B) 8,245 shs. * 318,838 -- ------------ ------------ 2,432,550 1,018,000 ------------ ------------ MAGNATECH INTERNATIONAL, INC. A supplier of process equipment and related parts used in the manufacturing of medium and high-pressure reinforced hoses. 12% Senior Subordinated Note due 2014 $ 675,000 04/05/06 629,207 688,034 13% Preferred Stock (B) 299 shs. 04/05/06 299,295 284,335 Common Stock (B) 66 shs. 04/05/06 66,202 62,890 Warrant, exercisable until 2014, to purchase common stock at $.01 per share (B) 7 shs. 04/05/06 6,832 -- ------------ ------------ 1,001,536 1,035,259 ------------ ------------ MAVERICK ACQUISITION COMPANY A manufacturer of capsules that cover the cork and neck of wine bottles. 9.85% Senior Secured Tranche A Note due 2010 (C) $ 367,783 09/03/04 367,783 369,431 12% Senior Secured Tranche B Note due 2011 $ 179,104 09/03/04 162,200 179,837 Limited Partnership Interest (B) 4.48% int. 09/03/04 33,582 33,001 Warrant, exercisable until 2011, to purchase common stock at $.01 per share (B) 243 shs. 09/03/04 22,556 23,845 ------------ ------------ 586,121 606,114 ------------ ------------ *12/23/98 and 01/28/99. ---------------------------------------------------------------------------------------------------------------------------------- 14 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL PARTICIPATION INVESTORS March 31, 2007 (Unaudited) Shares, Units, Warrants, Ownership or Acquisition CORPORATE RESTRICTED SECURITIES:(A)(Continued) Principal Amount Date Cost Fair Value -------------- -------- ------------ ------------ MAXON CORPORATION A manufacturer of industrial combustion equipment and related shut-off valves and control valves. 12% Senior Subordinated Note due 2012 $ 549,837 09/30/04 $ 509,197 $ 564,873 8.75% Senior Subordinated Note due 2012 $ 660,322 09/30/04 660,322 679,028 Common Stock (B) 218,099 shs. 09/30/04 218,099 658,202 Warrant, exercisable until 2012, to purchase common stock at $.01 per share (B) 87,755 shs. 09/30/04 51,941 264,837 ------------ ------------ 1,439,559 2,166,940 ------------ ------------ MEDASSIST, INC. A provider of patient eligibility and accounts receivable management services to hospitals and physician practices. 8% Preferred Stock (B) 44 shs. 10/28/04 44,289 44,563 Common Stock (B) 13,863 shs. 10/28/04 18,576 50,034 Warrant, exercisable until 2013, to purchase common stock at $.01 per share (B) 47,090 shs. 05/01/03 21,534 161,725 ------------ ------------ 84,399 256,322 ------------ ------------ MICROGROUP, INC. A manufacturer of precision parts and assemblies, and a value-added supplier of metal tubing and bars. 12% Senior Subordinated Note due 2013 $ 1,421,795 * 1,339,468 1,445,346 Common Stock (B) 238 shs. * 238,000 213,487 Warrant, exercisable until 2013, to purchase common stock at $.02 per share (B) 87 shs. * 86,281 77,869 ------------ ------------ 1,663,749 1,736,702 ------------ ------------ MOMENTUM HOLDING CO. A designer and supplier of upholstery fabric to commercial furniture manufacturers and architectural and design firms. 12% Senior Subordinated Note due 2014 $ 618,802 08/04/06 552,264 625,670 Limited Partnership Interest (B) 56,198 uts. 08/04/06 56,198 50,578 Warrant, exercisable until 2014, to purchase common stock at $.01 per share (B) 586 shs. 08/04/06 56,705 6 ------------ ------------ 665,167 676,254 ------------ ------------ MONESSEN HOLDING CORPORATION A designer and manufacturer of a broad line of gas, wood and electric hearth products and accessories. 12% Senior Subordinated Note due 2014 $ 1,350,000 03/31/06 1,254,998 1,283,830 Warrant, exercisable until 2014, to purchase common stock at $.01 per share (B) 81 shs. 03/31/06 73,125 1 ------------ ------------ 1,328,123 1,283,831 ------------ ------------ MORTON INDUSTRIAL GROUP, INC. A manufacturer of highly engineered metal fabricated components. 12% Senior Subordinated Note due 2014 $ 1,292,246 08/25/06 1,190,235 1,295,390 Common Stock (B) 57,754 shs. 08/25/06 57,754 51,979 Warrant, exercisable until 2014, to purchase common stock at $.01 per share (B) 91,923 shs. 08/25/06 79,380 919 ------------ ------------ 1,327,369 1,348,288 ------------ ------------ *08/12/05 and 09/11/06. ---------------------------------------------------------------------------------------------------------------------------------- 15 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL PARTICIPATION INVESTORS March 31, 2007 (Unaudited) Shares, Units, Warrants, Ownership or Acquisition CORPORATE RESTRICTED SECURITIES:(A)(Continued) Principal Amount Date Cost Fair Value -------------- -------- ------------ ------------ MOSS, INC. A manufacturer and distributor of large display and exhibit structures. Limited Partnership Interest of Riverside Capital Appreciation Fund I, L.P. (B) 19.20% int. * $ 199,301 $ 235,731 Warrant, exercisable until 2010, to purchase common stock at $.01 per share (B) 122 shs. 12/21/05 20,941 14,432 ------------ ------------ 220,242 250,163 ------------ ------------ NABCO, INC. A producer of explosive containment vessels in the United States. 12% Senior Subordinated Note due 2014 $ 330,882 02/24/06 306,186 309,044 Limited Liability Company Unit (B) 344 uts. 02/24/06 344,120 309,708 Warrant, exercisable until 2016, to purchase common stock at $.01 per share (B) 26 shs. 02/24/06 19,687 -- ------------ ------------ 669,993 618,752 ------------ ------------ NAVIS GLOBAL A designer, manufacturer, sale and servicer of finishing machinery for the knit and woven segments of the global textile industry. 12% Senior Subordinated Note due 2014 $ 705,457 05/28/04 645,282 699,106 8.75% Senior Secured Note due 2011 $ 409,310 05/28/04 409,310 408,736 Common Stock (B) 385,233 shs. 05/28/04 385,233 327,448 Warrant, exercisable until 2012, to purchase common stock at $.01 per share (B) 116,521 shs. 05/28/04 74,736 1,165 ------------ ------------ 1,514,561 1,436,455 ------------ ------------ NONNI'S FOOD COMPANY A producer and distributor of premium biscotti and bagel chips in North America. 12.25% Senior Subordinated Note due 2012 $ 986,538 03/29/04 982,661 1,000,854 10% Preferred Stock (B) 135 shs. 03/29/04 135,044 136,828 Common Stock (B) 3,418 shs. 03/29/04 3,418 82,682 Warrant, exercisable until 2012, to purchase common stock at $.01 per share (B) 4,565 shs. 03/29/04 3,877 110,420 ------------ ------------ 1,125,000 1,330,784 ------------ ------------ NYLONCRAFT, INC. A supplier of engineered plastic components for the automotive industry. 9% Senior Secured Note due 2009 $ 464,286 01/28/02 464,286 441,072 11.5% Senior Subordinated Note due 2012 $ 857,143 01/28/02 800,625 428,572 Common Stock (B) 178,571 shs. 01/28/02 178,571 -- Warrant, exercisable until 2012, to purchase common stock at $.01 per share (B) 138,928 shs. 01/28/02 92,597 -- ------------ ------------ 1,536,079 869,644 ------------ ------------ O R S NASCO HOLDING, INC. A wholesale distributor of industrial supplies in North America. 13% Senior Subordinated Note due 2013 $ 1,256,152 12/20/05 1,183,462 1,281,275 Common Stock (B) 93,848 shs. 12/20/05 93,848 112,292 Warrant, exercisable until 2015, to purchase common stock at $.01 per share (B) 52,820 shs. 12/20/05 52,292 63,201 ------------ ------------ 1,329,602 1,456,768 ------------ ------------ *09/20/00, 05/23/02 and 02/21/07. ---------------------------------------------------------------------------------------------------------------------------------- 16 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL PARTICIPATION INVESTORS March 31, 2007 (Unaudited) Shares, Units, Warrants, Ownership or Acquisition CORPORATE RESTRICTED SECURITIES:(A)(Continued) Principal Amount Date Cost Fair Value -------------- -------- ------------ ------------ OAKRIVER TECHNOLOGY, INC. Designs, engineers and assembles high precision automated process equipment for the medical device industry, with a focus on defibrillators and stents. 10% Senior Secured Note due 2012 $ 323,115 01/03/06 $ 318,268 $ 318,651 13% Senior Subordinated Note due 2013 $ 392,709 01/03/06 352,447 386,516 Common Stock (B) 184,176 shs. 01/03/06 184,176 165,758 Warrant, exercisable until 2013, to purchase common stock at $.01 per share (B) 43,073 shs. 01/03/06 35,900 431 ------------ ------------ 890,791 871,356 ------------ ------------ OLYMPIC SALES, INC. A boat retailer in Washington state, Oregon, California and British Columbia. 12% Senior Subordinated Note due 2008 $ 803,000 08/07/98 803,000 779,597 12% Senior Subordinated Note due 2008 $ 244,154 02/09/00 238,590 239,717 Limited Partnership Interest of Riverside VIII, VIII-A and VIII-B Holding Company, L.P. 10.66% int. * 808,386 808,347 Warrants, exercisable until 2007 and 2008, to purchase common stock at $.01 per share (B) 15,166 shs. ** 206,041 204,198 ------------ ------------ 2,056,017 2,031,859 ------------ ------------ ONTARIO DRIVE & GEAR LTD. A manufacturer of all-wheel drive, off-road amphibious vehicles and related accessories. 13% Senior Subordinated Note due 2013 $ 1,047,115 01/17/06 946,925 1,060,565 Limited Liability Company Unit (B) 1,942 uts. 01/17/06 302,885 360,288 Warrant, exercisable until 2013, to purchase common stock at $.01 per share (B) 328 shs. 01/17/06 90,424 60,830 ------------ ------------ 1,340,234 1,481,683 ------------ ------------ OVERTON'S HOLDING COMPANY A marketer of marine and water sports accessories in the United States. 12% Senior Subordinated Note due 2014 $ 962,104 04/28/06 901,783 963,896 Common Stock (B) 50 shs. 04/28/06 50,000 45,000 Warrant, exercisable until 2014, to purchase common stock at $.01 per share (B) 49 shs. 04/28/06 44,322 -- ------------ ------------ 996,105 1,008,896 ------------ ------------ P A S HOLDCO LLC An independent provider of maintenance, repair and overhaul services to the aerospace gas turbine engine and airframe markets. 14% Senior Subordinated Note due 2014 $ 1,158,977 07/03/06 1,101,385 1,169,412 Preferred Unit (B) 202 uts. 07/03/06 202,320 192,204 Preferred Unit (B) 36 uts. 07/03/06 36,420 34,599 Common Unit Class I (B) 78 uts. 07/03/06 -- 1 Common Unit Class L (B) 17 uts. 07/03/06 -- -- ------------ ------------ 1,340,125 1,396,216 ------------ ------------ *08/07/98, 02/23/99, 12/22/99 and 02/25/03. **08/07/98 and 02/29/00. ---------------------------------------------------------------------------------------------------------------------------------- 17 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL PARTICIPATION INVESTORS March 31, 2007 (Unaudited) Shares, Units, Warrants, Ownership or Acquisition CORPORATE RESTRICTED SECURITIES:(A)(Continued) Principal Amount Date Cost Fair Value -------------- -------- ------------ ------------ P I I HOLDING CORPORATION A manufacturer of plastic film and bags for the general industrial, medical, and food industries. 12% Senior Subordinated Note due 2013 $ 1,215,000 03/31/06 $ 1,137,517 $ 1,214,490 Preferred Stock (B) 19 shs. 03/31/06 174,492 165,788 Common Stock (B) 12 shs. 03/31/06 13,500 12,150 Warrant, exercisable until 2013, to purchase common stock at $.01 per share (B) 7 shs. 03/31/06 5,888 -- ------------ ------------ 1,331,397 1,392,428 ------------ ------------ PARADIGM PACKAGING, INC. A manufacturer of plastic bottles and closures for the nutritional, pharmaceutical, personal care and food packaging markets. 12% Senior Subordinated Note due 2008 $ 1,125,000 12/19/00 1,079,623 1,120,846 Membership Interests of MM/Lincap PPI Investments, Inc., LLC (B) 1.28% int. 12/21/00 140,625 194,471 ------------ ------------ 1,220,248 1,315,317 ------------ ------------ POSTLE ALUMINUM COMPANY LLC A manufacturer and distributor of aluminum extruded products. 12% Senior Subordinated Note due 2014 $ 1,080,000 10/02/06 1,000,172 1,086,320 Limited Liability Company Unit (B) 733 uts. 10/02/06 270,000 256,499 Warrant, exercisable until 2016, to purchase common stock at $.01 per share (B) 182 shs. 10/02/06 65,988 2 ------------ ------------ 1,336,160 1,342,821 ------------ ------------ PROTEIN GENETICS, INC. A producer of bovine artificial insemination products, related breeding and healthcare products and specialty genetics sold to the dairy and beef industries. 9.8% Redeemable Exchangeable Preferred Stock (B) 332 shs. 08/12/94 33,217 -- Common Stock (B) 867 shs. * 42,365 -- ------------ ------------ 75,582 -- ------------ ------------ QUALIS AUTOMOTIVE LLC A distributor of aftermarket automotive brake and chassis products. 12% Senior Subordinated Note due 2012 $ 937,500 05/28/04 791,010 938,722 Common Stock 187,500 shs. 05/28/04 187,500 64,525 Warrant, exercisable until 2012, to purchase common stock at $.01 per share 199,969 shs. 05/28/04 199,969 68,816 ------------ ------------ 1,178,479 1,072,063 ------------ ------------ QUALSERV CORPORATION A provider of foodservice equipment and supplies to major restaurant chains and their franchisees. 14% Senior Subordinated Note due 2012 (D) $ 1,002,475 07/09/04 976,254 -- Limited Partnership Interest (B) 4.90% int. 07/09/04 137,195 -- Warrant, exercisable until 2012, to purchase common stock at $.01 per share (B) 280 shs. 07/09/04 25,973 -- ------------ ------------ 1,139,422 -- ------------ ------------ *11/14/01 and 08/12/94. ---------------------------------------------------------------------------------------------------------------------------------- 18 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL PARTICIPATION INVESTORS March 31, 2007 (Unaudited) Shares, Units, Warrants, Ownership or Acquisition CORPORATE RESTRICTED SECURITIES:(A)(Continued) Principal Amount Date Cost Fair Value -------------- -------- ------------ ------------ R A J MANUFACTURING HOLDINGS LLC A designer and manufacturer of women's swimwear sold under a variety of licensed brand names. 12.5% Senior Subordinated Note due 2014 $ 1,200,277 12/15/06 $ 1,106,663 $ 1,203,200 Limited Liability Company Unit (B) 1,497 uts. 12/15/06 149,723 142,237 Warrant, exercisable until 2014, to purchase common stock at $.01 per share (B) 2 shs. 12/15/06 69,609 -- ------------ ------------ 1,325,995 1,345,437 ------------ ------------ RADIAC ABRASIVES, INC. A manufacturer of bonded abrasive and super abrasive grinding wheels in the United States. 12% Senior Subordinated Note due 2014 $ 1,196,809 02/10/06 1,115,629 1,232,712 Common Stock (B) 153,191 shs. 02/10/06 153,191 137,872 Warrant, exercisable until 2016, to purchase common stock at $.01 per share (B) 69,647 shs. 02/10/06 63,421 696 ------------ ------------ 1,332,241 1,371,280 ------------ ------------ RIVER RANCH FRESH FOODS LLC A supplier of fresh produce to the retail and foodservice channels. 13% Senior Subordinated Note due 2011 (D) $ 975,000 09/29/04 891,404 780,000 Limited Liability Company Unit (B) 21,500 uts. 09/29/04 150,000 -- 18% Preferred Stock (B) 75,000 shs. 11/16/06 75,000 75,000 Warrant, exercisable until 2011, to purchase common stock at $.01 per share (B) 12,481 shs. 09/29/04 83,596 -- ------------ ------------ 1,200,000 855,000 ------------ ------------ ROYAL BATHS MANUFACTURING COMPANY A manufacturer and distributor of acrylic and cultured marble bathroom products. 12.5% Senior Subordinated Note due 2011 $ 562,500 11/14/03 516,477 573,750 Warrant, exercisable until 2011, to purchase common stock at $.01 per share (B) 74 shs. 11/14/03 65,089 101,250 ------------ ------------ 581,566 675,000 ------------ ------------ SAFETY SPEED CUT MANUFACTURING COMPANY, INC. A manufacturer of vertical panel saws and routers for the wood working industry. 8.85% Senior Secured Tranche A Note due 2007 (C) $ 80,761 06/02/99 80,761 80,761 12% Senior Secured Tranche B Note due 2007 $ 646,089 06/02/99 646,089 646,089 Class B Common Stock (B) 846 shs. 06/02/99 146,456 664,038 ------------ ------------ 873,306 1,390,888 ------------ ------------ SAVAGE SPORTS HOLDING, INC. A manufacturer of sporting firearms. 12% Senior Subordinated Note due 2012 $ 814,655 09/10/04 766,554 828,199 Common Stock (B) 310 shs. 09/10/04 310,345 324,435 Warrant, exercisable until 2012, to purchase common stock at $.01 per share (B) 71 shs. 09/10/04 60,129 73,951 ------------ ------------ 1,137,028 1,226,585 ------------ ------------ SPECIALTY FOODS GROUP, INC. A manufacturer and distributor of branded meat products. Limited Partnership Interest of MHD Holdings LLC 0.76% int. 08/29/00 363,576 -- ------------ ------------ ---------------------------------------------------------------------------------------------------------------------------------- 19 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL PARTICIPATION INVESTORS March 31, 2007 (Unaudited) Shares, Units, Warrants, Ownership or Acquisition CORPORATE RESTRICTED SECURITIES:(A)(Continued) Principal Amount Date Cost Fair Value -------------- -------- ------------ ------------ STANTON CARPET HOLDING CO. A designer and marketer of high and mid-priced decorative carpets and rugs. 12.13% Senior Subordinated Note due 2014 $ 1,185,366 08/01/06 $ 1,114,427 $ 1,187,896 Common Stock (B) 165 shs. 08/01/06 164,634 148,167 Warrant, exercisable until 2014, to purchase common stock at $.01 per share (B) 55 shs. 08/01/06 49,390 1 ------------ ------------ 1,328,451 1,336,064 ------------ ------------ STRATEGIC EQUIPMENT & SUPPLY CORPORATION, INC. A provider of kitchen and restaurant design, equipment fabrication and installation services. Warrant, exercisable until 2008, to purchase common stock at $.01 per share (B) 61,862 shs. 01/14/00 382,501 -- ------------ ------------ SYNVENTIVE EQUITY LLC A manufacturer of hot runner systems used in the plastic injection molding process. Limited Liability Company Unit (B) 1.05% int. 08/20/03 33,462 7,465 Warrant, exercisable until 2011, to purchase common stock at $.01 per share (B) 45,942 shs. 08/21/03 10,249 10,249 ------------ ------------ 43,711 17,714 ------------ ------------ TANGENT RAIL CORPORATION A manufacturer of rail ties and provides specialty services to the North American railroad industry. 13% Senior Subordinated Note due 2013 $ 1,173,909 10/14/05 1,011,793 1,197,387 Preferred Stock (B) 701 shs. 10/14/05 70,078 73,933 Common Stock (B) 1,167 shs. 10/14/05 1,167 209,886 Warrant, exercisable until 2013, to purchase common stock at $.01 per share (B) 618 shs. 10/14/05 155,860 111,148 ------------ ------------ 1,238,898 1,592,354 ------------ ------------ TERRA RENEWAL SERVICES, INC. A provider of wastewater residual management and required environmental reporting, permitting, nutrient management planning and record keeping to companies involved in poultry and food processing. 8.65 Senior Secured Tranche B Note due 2012 (C) $ 874,322 * 871,105 865,704 12% Senior Subordinated Note due 2014 $ 664,062 ** 632,521 665,596 Limited Partnership Interest of Saw Mill Capital Fund V, L.P. 2.30% int. 03/01/05 66,448 110,957 Warrant, exercisable until 2016, to purchase common stock at $.01 per share (B) 41 shs. 04/28/06 34,627 27,853 ------------ ------------ 1,604,701 1,670,110 ------------ ------------ TOTAL EQUIPMENT & SERVICE, INC. A manufacturer of a wide variety of equipment used in the oil and gas industry. 10.5% Senior Secured Term Note due 2013 $ 486,487 03/02/07 479,190 479,465 13% Senior Subordinated Note due 2014 $ 341,971 03/02/07 280,347 335,772 Common Stock (B) 71,542 shs. 03/02/07 71,542 67,965 Warrant, exercisable until 2014 to purchase common stock at $.01 per share (B) 19,733 shs. 03/02/07 54,784 197 ------------ ------------ 885,863 883,399 ------------ ------------ *04/28/06 and 12/21/06. **04/28/06 and 09/13/06. ---------------------------------------------------------------------------------------------------------------------------------- 20 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL PARTICIPATION INVESTORS March 31, 2007 (Unaudited) Shares, Units, Warrants, Ownership or Acquisition CORPORATE RESTRICTED SECURITIES:(A)(Continued) Principal Amount Date Cost Fair Value -------------- -------- ------------ ------------ THE TRANZONIC COMPANIES A producer of commercial and industrial supplies, such as safety products, janitorial supplies, work apparel, washroom and restroom supplies and sanitary care products. 13% Senior Subordinated Note due 2009 $ 1,356,000 02/05/98 $ 1,291,121 $ 1,356,000 Common Stock (B) 315 shs. 02/04/98 315,000 108,755 Warrant, exercisable until 2009, to purchase common stock at $.01 per share (B) 222 shs. 02/05/98 184,416 76,647 ------------ ------------ 1,790,537 1,541,402 ------------ ------------ TRANSTAR HOLDING COMPANY A distributor of aftermarket automotive transmission parts. 12% Senior Subordinated Note due 2013 $ 918,000 08/31/05 881,515 942,570 Common Stock (B) 432 shs. 08/31/05 432,000 404,615 Warrant, exercisable until 2013, to purchase common stock at $.01 per share (B) 46 shs. 08/31/05 41,021 42,616 ------------ ------------ 1,354,536 1,389,801 ------------ ------------ TRONAIR, INC. A designer, engineer and manufacturer of ground support equipment for the business, commuter and commercial aviation markets. 10.5% Senior Secured Term Note due 2008 $ 225,806 01/20/00 225,806 227,057 12% Senior Subordinated Note due 2010 $ 758,100 01/20/00 737,070 771,361 Common Stock (B) 129,960 shs. 01/20/00 129,960 499,162 Warrant, exercisable until 2010, to purchase common stock at $1 per share (B) 148,911 shs. 01/20/00 56,316 571,951 ------------ ------------ 1,149,152 2,069,531 ------------ ------------ TRUCK BODIES & EQUIPMENT INTERNATIONAL A designer and manufacturer of accessories for heavy and medium duty trucks, primarily dump bodies, hoists, various forms of flat-bed bodies, landscape bodies and other accessories. 12% Senior Subordinated Note due 2013 $ 1,222,698 * 1,143,522 1,249,980 Common Stock (B) 393 shs. * 423,985 975,779 Warrant, exercisable until 2013, to purchase common stock at $.02 per share (B) 81 shs. * 84,650 201,515 ------------ ------------ 1,652,157 2,427,274 ------------ ------------ TRUSTILE DOORS, INC. A manufacturer and distributor of interior doors. 12.5% Senior Subordinated Note due 2010 $ 562,500 04/11/03 534,481 573,750 Warrant, exercisable until 2010, to purchase common stock at $.01 per share (B) 3,060 shs. 04/11/03 47,974 115,706 ------------ ------------ 582,455 689,456 ------------ ------------ U S S HOLDINGS, INC. A producer of high grade industrial and specialty silica sands. 14% Redeemable Preferred Stock (B) 499 shs. 09/30/99 272,912 466,871 Convertible Preferred Stock Series A and B, convertible into common stock at $8.02 per share (B) 72,720 shs. 12/19/96 583,365 -- Common Stock (B) 10,013 shs. 09/30/99 399,505 -- Warrants, exercisable until 2010, to purchase common stock at $.01 per share (B) 2,459 shs. ** 64,182 -- ------------ ------------ 1,319,964 466,871 ------------ ------------ *07/19/05 and 12/22/05. **12/19/96 and 09/30/99. ---------------------------------------------------------------------------------------------------------------------------------- 21 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL PARTICIPATION INVESTORS March 31, 2007 (Unaudited) Shares, Units, Warrants, Ownership or Acquisition CORPORATE RESTRICTED SECURITIES:(A)(Continued) Principal Amount Date Cost Fair Value -------------- -------- ------------ ------------ U-LINE CORPORATION A manufacturer of high-end, built-in, undercounter ice making, wine storage and refrigeration appliances. 12.5% Senior Subordinated Note due 2012 $ 996,500 04/30/04 $ 910,289 $ 996,500 Common Stock (B) 96 shs. 04/30/04 96,400 164,150 Warrant, exercisable until 2012, to purchase common stock at $.01 per share (B) 122 shs. 04/30/04 112,106 207,742 ------------ ------------ 1,118,795 1,368,392 ------------ ------------ VICTORY VENTURES LLC An acquirer of controlling or substantial interests in other entities. Series A Preferred Units (B) 0.04% int. 12/02/96 1 -- ------------ ------------ VITALITY FOODSERVICE, INC. A non-carbonated beverage dispensing company focused on the foodservice industry. 15% Senior Subordinated Note due 2011 $ 1,036,622 09/24/04 958,280 932,960 Common Stock (B) 14,006 shs. * 140,064 112,048 Warrant, exercisable until 2011, to purchase common stock at $.01 per share (B) 12,593 shs. 09/24/04 98,938 100,744 ------------ ------------ 1,197,282 1,145,752 ------------ ------------ VITEX PACKAGING GROUP, INC. A manufacturer of specialty packaging, primarily envelopes and tags used on tea bags. 12.5% Senior Subordinated Note due 2012 $ 900,000 07/19/04 785,152 827,113 Limited Liability Company Unit Class A (B) 0.93% int. 07/19/04 219,375 175,500 Limited Liability Company Unit Class B (B) 0.41% int. 07/19/04 96,848 77,479 ------------ ------------ 1,101,375 1,080,092 ------------ ------------ WALLS INDUSTRIES, INC. A provider of branded workwear and sporting goods apparel. 12.35% Senior Subordinated Lien Note due 2009 (C) $ 345,395 07/12/04 345,395 345,911 14% Senior Subordinated Note due 2012 $ 574,613 07/12/04 573,277 586,105 Limited Partnership Interest (B) 0.20% int. 07/12/04 19,737 362,507 Warrant, exercisable until 2014, to purchase common stock at $.01 per share (B) 2,133 shs. 07/12/04 1,500 39,181 ------------ ------------ 939,909 1,333,704 ------------ ------------ WELLBORN FOREST HOLDING CO. A manufacturer of semi-custom kitchen and bath cabinetry. 12.13% Senior Subordinated Note due 2014 $ 911,250 11/30/06 848,131 890,787 Common Stock (B) 101 shs. 11/30/06 101,250 96,188 Warrant, exercisable until 2014, to purchase common stock at $.01 per share (B) 51 shs. 11/30/06 45,790 1 ------------ ------------ 995,171 986,976 ------------ ------------ Total Private Placement Investments $ 96,569,446 $ 97,416,793 ------------ ------------ *09/24/04 and 12/22/06. ---------------------------------------------------------------------------------------------------------------------------------- 22 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL PARTICIPATION INVESTORS March 31, 2007 (Unaudited) Shares or Interest Due Principal CORPORATE RESTRICTED SECURITIES(A)(Continued) Rate Date Amount Cost Fair Value -------- -------- ------------ ------------ ------------ RULE 144A SECURITIES - 4.63%: (A) BONDS - 4.63% Aramark Corporation 8.500% 02/01/15 $ 100,000 $ 100,000 $ 103,500 Aramark Corporation 8.860 02/01/15 100,000 100,000 102,875 Bombardier, Inc. 6.300 05/01/14 500,000 440,315 475,000 Charter Communications Op LLC 8.000 04/30/12 250,000 249,375 260,313 Douglas Dynamics LLC 7.750 01/15/12 325,000 326,543 302,250 G F S I, Inc. (C) 11.500 06/01/11 375,000 340,343 371,250 H C A, Inc. 9.250 11/15/16 500,000 508,698 539,375 Idearc, Inc. 8.000 11/15/16 300,000 300,000 308,625 Packaging Dynamics Corporation of Ameri 10.000 05/01/16 850,000 859,972 875,500 Rental Service Corporation 9.500 12/01/14 500,000 507,279 532,500 Steel Dynamics, Inc. 6.750 04/01/15 100,000 100,000 100,250 Stewart & Stevenson LLC 10.000 07/15/14 750,000 771,090 785,625 Tenaska Alabama Partners LP 7.000 06/30/21 176,110 176,110 177,232 Titan International, Inc. 8.000 01/15/12 70,000 70,000 72,013 Transdigm, Inc. 7.750 07/15/14 150,000 151,481 154,875 Tube City IMS Corporation 9.750 02/01/15 320,000 332,789 332,800 Tunica-Biloxi Gaming Authority 9.000 11/15/15 500,000 516,383 531,250 ------------ ------------ TOTAL BONDS $ 5,850,378 6,025,233 ------------ ------------ WARRANTS - 0.00% Winsloew Furniture, Inc. (B) 700 $ 7 $ -- ------------ ------------ TOTAL WARRANTS 7 -- ------------ ------------ TOTAL RULE 144A SECURITIES 5,850,385 6,025,233 ------------ ------------ TOTAL CORPORATE RESTRICTED SECURITIES $102,419,831 $103,442,026 ------------ ------------ ------------------------------------------------------------------------------------------------------------------------ 23 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL PARTICIPATION INVESTORS March 31, 2007 (Unaudited) Interest Due Principal CORPORATE PUBLIC SECURITIES -- 23.49%:(A) Rate Date Amount Cost Market Value -------- -------- ------------ ------------ ------------ BONDS - 23.28% Allied Waste NA 7.875% 04/15/13 $ 500,000 $ 513,468 $ 518,750 Appleton Papers, Inc. 8.125 06/15/11 250,000 250,000 256,875 Atlas Pipeline Partners 8.125 12/15/15 600,000 612,225 618,000 BCP Crystal US Holdings Corporation 9.625 06/15/14 355,000 355,000 403,252 Basic Energy Services 7.125 04/15/16 625,000 610,043 609,375 Blockbuster, Inc. (C) 9.000 09/01/12 275,000 276,262 277,750 Cablevision Systems Corporation 8.000 04/15/12 500,000 506,597 507,500 Chemed Corporation 8.750 02/24/11 600,000 600,000 624,000 Chesapeake Energy Corporation 7.000 08/15/14 650,000 673,574 669,500 Cincinnati Bell, Inc. 8.375 01/15/14 550,000 503,750 562,375 Clayton Williams Energy, Inc. 7.750 08/01/13 575,000 557,000 540,500 Del Monte Corporation 8.625 12/15/12 200,000 200,000 208,000 Dynegy Holdings, Inc. 8.375 05/01/16 665,000 676,522 691,600 Edison Mission Energy 7.750 06/15/16 35,000 35,000 36,488 Electronic Data Systems Corporation 7.125 10/15/09 500,000 503,584 521,389 Esterline Technologies 7.750 06/15/13 175,000 175,000 179,813 Exco Resources, Inc. 7.250 01/15/11 500,000 488,750 501,250 Ford Motor Credit Co. 7.375 10/28/09 750,000 748,125 748,622 Ford Motor Credit Co. 8.000 12/15/16 150,000 147,483 144,491 Freeport-McMoran Copper & Gold 8.375 04/01/17 190,000 190,000 205,438 Gencorp, Inc. 9.500 08/15/13 130,000 130,000 138,450 General Motors Acceptance Corporation 5.850 01/14/09 750,000 742,074 740,348 Goodyear Tire & Rubber Co. 7.857 08/15/11 350,000 327,250 366,188 Goodyear Tire & Rubber Co. 9.000 07/01/15 100,000 101,984 109,750 GulfMark Offshore, Inc. 7.750 07/15/14 300,000 298,725 304,500 Inergy LP 8.250 03/01/16 75,000 75,000 78,750 Interline Brands, Inc. 8.125 06/15/14 150,000 148,925 154,875 Iron Mountain, Inc. 8.750 07/15/18 500,000 515,456 537,500 K 2, Inc. 7.375 07/01/14 150,000 150,515 148,875 Koppers, Inc. 9.875 10/15/13 170,000 170,000 184,450 Lazard LLC 7.125 05/15/15 375,000 374,704 395,357 Leucadia National Corporation 7.000 08/15/13 350,000 355,759 351,750 Liberty Media Corporation 5.700 05/15/13 500,000 475,805 479,386 Lodgenet Entertainment Corp. 9.500 06/15/13 375,000 375,000 409,794 M G M Mirage, Inc. 6.000 10/01/09 225,000 226,808 225,281 Mac-Gray Corporation 7.625 08/15/15 300,000 300,000 306,000 Majestic Star Casino LLC 9.500 10/15/10 250,000 250,000 262,188 Manitowoc Company, Inc. 7.125 11/01/13 100,000 100,000 102,000 Markwest Energy Operating Co. 6.875 11/01/14 550,000 532,750 533,500 Mediacom Broadband LLC 8.500 10/15/15 750,000 766,492 766,875 Metaldyne Corporation (C) 10.000 11/01/13 340,000 341,832 347,650 N R G Energy, Inc. 7.375 02/01/16 600,000 598,750 616,500 NTL Cable PLC 9.125 08/15/16 690,000 709,688 727,950 Nalco Co. 7.750 11/15/11 250,000 250,000 256,250 Neiman Marcus Group, Inc. 10.375 10/15/15 600,000 600,000 669,000 Nextel Communications, Inc. 7.375 08/01/15 400,000 408,554 413,720 North American Energy Partners 8.750 12/01/11 200,000 200,000 204,000 Nova Chemicals Corporation (C) 8.502 11/15/13 215,000 215,000 213,925 O E D Corp/Diamond Jo Company Guarantee 8.750 04/15/12 500,000 492,980 496,250 Offshore Logistics, Inc. 6.125 06/15/13 350,000 350,000 333,375 P Q Corporation 7.500 02/15/13 685,000 677,350 691,850 Pacific Energy Partners 7.125 06/15/14 250,000 251,811 261,080 Pacific Energy Partners 6.250 09/15/15 100,000 99,544 99,996 Petrohawk Energy Corporation 9.125 07/15/13 500,000 498,932 532,500 Pinnacle Foods Group 8.250 12/01/13 225,000 225,000 244,699 ------------------------------------------------------------------------------------------------------------------------ 24 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL PARTICIPATION INVESTORS March 31, 2007 (Unaudited) Interest Due Principal CORPORATE PUBLIC SECURITIES(A)(Continued) Rate Date Amount Cost Market Value -------- -------- ------------ ------------ ------------ BONDS, CONTINUED Pliant Corporation (C) 11.850% 06/15/09 $ 681,101 $ 685,935 $ 771,347 Primedia, Inc. 8.000 05/15/13 500,000 513,605 517,500 Quicksilver Resources, Inc. 7.125 04/01/16 600,000 583,125 591,000 R H Donnelley, Inc. 8.875 01/15/16 325,000 346,472 345,313 Rent-A-Center, Inc. 7.500 05/01/10 250,000 250,000 251,875 Rock-Tenn Co. 8.200 08/15/11 80,000 80,497 84,800 Rogers Wireless, Inc. 7.500 03/15/15 560,000 597,648 606,900 Service Corporation International (C) 7.000 06/15/17 500,000 495,015 503,750 Sheridan Acquisition Corporation 10.250 08/15/11 225,000 222,001 235,406 Sierra Pacific Resources 6.750 08/15/17 330,000 331,551 336,864 Tekni-Plex, Inc. 12.750 06/15/10 500,000 483,500 467,500 Tenet Healthcare Corporation 6.375 12/01/11 250,000 241,250 233,750 Tenet Healthcare Corporation 9.875 07/01/14 350,000 341,859 353,500 Tenneco, Inc. 8.625 11/15/14 500,000 501,250 521,250 Tennessee Gas Pipeline Co. 7.000 03/15/27 250,000 261,826 267,011 Texas Industries, Inc. 7.250 07/15/13 35,000 35,000 36,050 Triton P C S, Inc. 8.500 06/01/13 500,000 500,000 515,000 Tyco International Group SA 6.375 10/15/11 150,000 148,500 158,515 Unisys Corporation 8.000 10/15/12 90,000 90,000 90,225 United Components, Inc. 9.375 06/15/13 535,000 536,200 553,725 United Rentals, Inc. 7.750 11/15/13 325,000 325,000 333,938 Universal City Florida (C) 10.110 05/01/10 100,000 100,000 103,125 Universal City Florida (C) 8.375 05/01/10 100,000 100,000 103,125 Vought Aircraft Industries 8.000 07/15/11 650,000 648,609 637,000 Warner Music Group Corporation 7.375 04/15/14 125,000 125,000 119,063 ------------ ------------ TOTAL BONDS $ 29,502,914 $ 30,267,062 ------------ ------------ ------------------------------------------------------------------------------------------------------------------------ 25 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL PARTICIPATION INVESTORS March 31, 2007 (Unaudited) Shares or Interest Due Principal CORPORATE PUBLIC SECURITIES(A)(Continued) Rate Date Amount Cost Market Value -------- -------- ------------ ------------ ------------ COMMON STOCK - 0.01% Distributed Energy Systems Corporation (B) 14,000 $ 177,078 $ 19,180 ------------ ------------ TOTAL COMMON STOCK 177,078 19,180 ------------ ------------ CONVERTIBLE BONDS - 0.20% Citadel Broadcasting Corporation 1.875% 02/15/11 $ 300,000 $ 232,875 $ 254,250 ------------ ------------ TOTAL CONVERTIBLE BONDS 232,875 254,250 ------------ ------------ TOTAL CORPORATE PUBLIC SECURITIES $ 29,912,867 $ 30,540,492 ------------ ------------ Interest Due Principal SHORT-TERM SECURITIES: Rate/Yield* Date Amount Cost Market Value -------- -------- ------------ ------------ ------------ COMMERCIAL PAPER - 4.10% Burlington Northern Santa Fe 5.380% 04/02/07 $ 2,527,000 $ 2,526,245 $ 2,526,245 ConocoPhillips 5.470 04/03/07 1,703,000 1,702,224 1,702,224 Wellpoint, Inc. 5.330 04/02/07 1,103,000 1,102,673 1,102,673 ------------ ------------ TOTAL SHORT-TERM SECURITIES $ 5,331,142 $ 5,331,142 ------------ ------------ TOTAL INVESTMENTS 107.15% $137,663,840 $139,313,660 ============ ------------ Other Assets 2.94 3,819,848 Liabilities (10.09) (13,118,111) ------ ------------ TOTAL NET ASSETS 100.00% $130,015,397 ====== ============ (A) In each of the convertible note, warrant, convertible preferred and common stock investments, the issuer has agreed to provide certain registration rights. (B) Non-income producing security. (C) Variable rate security; rate indicated is as of 03/31/07. (D) Defaulted security; interest not accrued. * Effective yield at purchase. See Notes to Consolidated Financial Statements. ------------------------------------------------------------------------------------------------------------------------ 26 CONSOLIDATED SCHEDULE OF INVESTMENTS (CONT.) MASSMUTUAL PARTICIPATION INVESTORS March 31, 2007 (Unaudited) Fair Value/ Fair Value/ INDUSTRY CLASSIFICATION: Market Value Market Value -------------- -------------- AEROSPACE - 3.16% BUILDINGS & REAL ESTATE - 2.37% Consolidated Foundries Holdings $ 1,598,743 Adorn, Inc. $ 1,027,335 Esterline Technologies 179,813 K W P I Holdings Corporation 1,326,966 Gencorp, Inc. 138,450 Texas Industries, Inc. 36,050 P A S Holdco LLC 1,396,216 TruStile Doors, Inc. 689,456 Transdigm, Inc. 154,875 ------------ Vought Aircraft Industries 637,000 3,079,807 ------------ ------------ 4,105,097 ------------ CHEMICAL, PLASTICS & RUBBER - 1.51% BCP Crystal US Holdings Corporation 403,252 AUTOMOBILE - 9.20% Capital Specialty Plastics, Inc. 223,573 Ford Motor Credit Co. 893,113 Koppers, Inc. 184,450 Fuel Systems Holding Corporation 1,577,651 Nalco Co. 256,250 General Motors Acceptance Corporation 740,348 Nova Chemicals Corporation 213,925 Goodyear Tire & Rubber Co. 475,938 P Q Corporation 691,850 Jason, Inc. 942,536 ------------ LIH Investors, L.P. 1,018,000 1,973,300 Metaldyne Corporation 347,650 ------------ Nyloncraft, Inc. 869,644 Ontario Drive & Gear Ltd. 1,481,683 CONSUMER PRODUCTS - 9.21% Qualis Automotive LLC 1,072,063 Aero Holdings, Inc. 1,759,135 Tenneco, Inc. 521,250 Augusta Sportswear Holding Co. 1,651,327 Titan International, Inc. 72,013 Bravo Sports Holding Corporation 1,276,773 Transtar Holding Company 1,389,801 G F S I, Inc. 371,250 United Components, Inc. 553,725 K N B Holdings Corporation 1,350,132 ------------ Momentum Holding Co. 676,254 11,955,415 R A J Manufacturing Holdings LLC 1,345,437 ------------ Royal Baths Manufacturing Company 675,000 The Tranzonic Companies 1,541,402 BEVERAGE, DRUG & FOOD - 3.85% Walls Industries, Inc. 1,333,704 Aramark Corporation 206,375 Winsloew Furniture, Inc. -- Beta Brands Ltd. -- ------------ Cains Foods, L.P. 154,384 11,980,414 Del Monte Corporation 208,000 ------------ Eagle Pack Pet Foods, Inc. 859,475 Nonni's Food Company 1,330,784 CONTAINERS, PACKAGING & GLASS - 5.70% Pinnacle Foods Group 244,699 Flutes, Inc. 903,338 River Ranch Fresh Foods LLC 855,000 Maverick Acquisition Company 606,114 Specialty Foods Group, Inc. -- P I I Holding Corporation 1,392,428 Vitality Foodservice, Inc. 1,145,752 Packaging Dynamics Corporation of America 875,500 ------------ Paradigm Packaging, Inc. 1,315,317 5,004,469 Pliant Corporation 771,347 ------------ Tekni-Plex, Inc. 467,500 Vitex Packaging, Inc. 1,080,092 BROADCASTING & ENTERTAINMENT - 2.06% ------------ Cablevision Systems Corporation 507,500 7,411,636 Charter Communications Op LLC 260,313 ------------ Citadel Broadcasting Corporation 254,250 Liberty Media Corporation 479,386 DISTRIBUTION - 3.76% Lodgenet Entertainment Corporation 409,794 Duncan Systems, Inc. 878,287 Mediacom Broadband LLC 766,875 Kele and Associates, Inc. 1,520,107 ------------ Magnatech International, Inc. 1,035,259 2,678,118 O R S Nasco Holding, Inc. 1,456,768 ------------ QualServ Corporation -- Strategic Equipment & Supply Corporation, Inc. -- ------------ 4,890,421 ------------ ---------------------------------------------------------------------------------------------------------------------------------- 27 CONSOLIDATED SCHEDULE OF INVESTMENTS (CONT.) MASSMUTUAL PARTICIPATION INVESTORS March 31, 2007 (Unaudited) Fair Value/ Fair Value/ INDUSTRY CLASSIFICATION:(Cont.) Market Value Market Value -------------- -------------- DIVERSIFIED/CONGLOMERATE, HEALTHCARE, EDUCATION & MANUFACTURING - 8.00% CHILDCARE - 4.07% AmerCable, Inc. $ 879,335 A T I Acquisition Company $ 1,133,154 Arrow Tru-Line Holdings, Inc. 1,164,303 American Hospice Management Holding LLC 1,353,907 Bombardier, Inc. 475,000 F H S Holdings LLC 1,417,117 Coining Corporation of America LLC 1,528,477 H C A, Inc. 539,375 Dexter Magnetics Technologies, Inc. 756,772 MedAssist, Inc. 256,322 Douglas Dynamics LLC 302,250 Tenet Healthcare Corporation 587,250 Evans Consoles, Inc. -- ------------ Postle Aluminum Company LLC 1,342,821 5,287,125 Radiac Abrasives, Inc. 1,371,280 ------------ Truck Bodies & Equipment International 2,427,274 Tyco International Group SA 158,515 HOME & OFFICE FURNISHINGS, HOUSEWARES, ------------ AND DURABLE CONSUMER PRODUCTS - 6.87% 10,406,027 Connor Sport Court International, Inc. 529,709 ------------ H M Holding Company 1,227,655 Home Decor Holding Company 1,284,612 DIVERSIFIED/CONGLOMERATE, Justrite Manufacturing Acquisition Co. 914,455 SERVICE - 3.74% Monessen Holding Coporation 1,283,831 Allied Waste NA 518,750 Stanton Carpet Holding Co. 1,336,064 CapeSuccess LLC 2,512 U-Line Corporation 1,368,392 Chemed Corporation 624,000 Wellborn Forest Holding Co. 986,976 Diversco, Inc./DHI Holdings, Inc. -- ------------ Dwyer Group, Inc. 607,260 8,931,694 Fowler Holding, Inc. 1,356,989 ------------ Interline Brands, Inc. 154,875 Iron Mountain, Inc. 537,500 LEISURE, AMUSEMENT, Mac-Gray Corporation 306,000 ENTERTAINMENT - 3.90% Moss, Inc. 250,163 Harrah's Operating Co. Service Corporation International 503,750 K 2, Inc. 148,875 ------------ Keepsake Quilting, Inc. 836,992 4,861,799 M G M Mirage, Inc. 225,281 ------------ Majestic Star Casino LLC 262,188 O E D Corp/Diamond Jo Company Guarantee 496,250 ELECTRONICS - 2.90% Overton's Holding Company 1,008,896 Connecticut Electric, Inc. 1,385,824 Savage Sports Holding, Inc. 1,226,585 Directed Electronics, Inc. 1,839,798 Tunica-Biloxi Gaming Authority 531,250 Distributed Energy Systems Corporation 19,180 Universal City Florida 206,250 Electronic Data Systems Corporation 521,389 Warner Music Group Corporation 119,063 ------------ ------------ 3,766,191 5,061,630 ------------ ------------ FARMING & AGRICULTURE - 0.00% MACHINERY - 9.75% Protein Genetics, Inc. -- Davis-Standard LLC 1,339,109 ------------ Hawk Precision Components Group, Inc. 1,302,938 Integration Technology Systems, Inc. 711,753 FINANCIAL SERVICES - 0.57% Manitowoc Company, Inc. 102,000 Highgate Capital LLC -- Maxon Corporation 2,166,940 Lazard LLC 395,357 Morton Industrial Group, Inc. 1,348,288 Leucadia National Corporation 351,750 Navis Global 1,436,455 Victory Ventures LLC -- Safety Speed Cut Manufacturing Company, Inc. 1,390,888 ------------ Stewart & Stevenson LLC 785,625 747,107 Synventive Equity LLC 17,714 ------------ Tronair, Inc. 2,069,531 ------------ 12,671,241 ------------ ---------------------------------------------------------------------------------------------------------------------------------- 28 CONSOLIDATED SCHEDULE OF INVESTMENTS (CONT.) MASSMUTUAL PARTICIPATION INVESTORS March 31, 2007 (Unaudited) Fair Value/ Fair Value/ INDUSTRY CLASSIFICATION:(Cont.) Market Value Market Value -------------- -------------- MEDICAL DEVICES/BIOTECH - 2.70% RETAIL STORES - 3.15% Coeur, Inc. $ 822,631 Blockbuster, Inc. $ 277,750 E X C Acquisition Corporation 81,825 Neiman Marcus Group, Inc. 669,000 MicroGroup, Inc. 1,736,702 Olympic Sales, Inc. 2,031,859 OakRiver Technology, Inc. 871,356 Rent-A-Center, Inc. 251,875 ------------ Rental Service Corporation 532,500 3,512,514 United Rentals, Inc. 333,938 ------------ ------------ 4,096,922 MINING, STEEL, IRON & NON PRECIOUS ------------ METALS - 0.85% Freeport-McMoran Copper & Gold 205,438 TECHNOLOGY - 0.07% Steel Dynamics, Inc. 100,250 Unisys Corporation 90,225 Tube City IMS Corporation 332,800 ------------ U S S Holdings, Inc. 466,871 ------------ TELECOMMUNICATIONS - 3.38% 1,105,359 Cincinnati Bell, Inc. 562,375 ------------ DeltaCom, Inc. 1,567,245 Nextel Communications, Inc. 413,720 NATURAL RESOURCES - 0.26% NTL Cable PLC 727,950 Appleton Papers, Inc. 256,875 Rogers Wireless, Inc. 606,900 Rock-Tenn Co. 84,800 Triton P C S, Inc. 515,000 ------------ ------------ 341,675 4,393,190 ------------ ------------ OIL AND GAS - 4.25% TRANSPORTATION - 1.70% Atlas Pipeline Partners 618,000 NABCO, Inc. 618,752 Basic Energy Services 609,375 Tangent Rail Corporation 1,592,354 Chesapeake Energy Corporation 669,500 ------------ Clayton Williams Energy, Inc. 540,500 2,211,106 Exco Resources, Inc. 501,250 ------------ GulfMark Offshore, Inc. 304,500 North American Energy Partners 204,000 UTILITIES - 2.59% Offshore Logistics, Inc. 333,375 Dynegy Holdings, Inc. 691,600 Quicksilver Resources, Inc. 591,000 Edison Mission Energy 36,488 Tennessee Gas Pipeline Co. 267,011 Inergy LP 78,750 Total Equipment & Service, Inc. 883,399 Markwest Energy Operating Co. 533,500 ------------ N R G Energy, Inc. 616,500 5,521,910 Pacific Energy Partners 361,076 ------------ Petrohawk Energy Corporation 532,500 Sierra Pacific Resources 336,864 PHARMACEUTICALS - 1.12% Tenaska Alabama Partners LP 177,232 CorePharma LLC 1,400,412 ------------ Enzymatic Therapy, Inc. 56,250 3,364,510 ------------ ------------ 1,456,662 ------------ WASTE MANAGEMENT / POLLUTION - 1.28% Terra Renewal Services, Inc. 1,670,110 PUBLISHING/PRINTING - 1.08% ------------ Idearc, Inc. 308,625 Primedia, Inc. 517,500 Total Corporate Restricted and R H Donnelley, Inc. 345,313 Public Securities - 103.05% $133,982,518 Sheridan Acquisition Corporation 235,406 ============ ------------ 1,406,844 ------------ ---------------------------------------------------------------------------------------------------------------------------------- 29 NOTES TO CONSOLIDATED FINANCIAL STATEMENTS MASSMUTUAL PARTICIPATION INVESTORS (Unaudited) 1. HISTORY MassMutual Participation Investors (the "Trust") was organized as a Massachusetts business trust under the laws of the Commonwealth of Massachusetts pursuant to a Declaration of Trust dated April 7, 1988. The Trust is a diversified closed-end management investment company. Babson Capital Management LLC ("Babson Capital"), a wholly-owned indirect subsidiary of Massachusetts Mutual Life Insurance Company ("MassMutual"), acts as its investment adviser. The Trust's investment objective is to maximize total return by providing a high level of current income, the potential for growth of such income, and capital appreciation, by investing primarily in a portfolio of privately placed, below investment grade, long-term corporate debt obligations purchased directly from their issuers, at least half of which normally will include equity features. On January 27, 1998, the Board of Trustees authorized the formation of a wholly owned subsidiary of the Trust ("MMPI Subsidiary Trust") for the purpose of holding certain investments. The results of the MMPI Subsidiary Trust are consolidated in the accompanying financial statements. Footnote 2.D below discusses the federal tax consequences of the MMPI Subsidiary Trust. 2. SIGNIFICANT ACCOUNTING POLICIES The following is a summary of significant accounting policies followed consistently by the Trust in the preparation of its consolidated financial statements in conformity with accounting principles generally accepted in the United States of America. A. VALUATION OF INVESTMENTS: Valuation of a security in the Trust's portfolio is made on the basis of market price whenever market quotations are readily available and all securities of the same class held by the Trust can be readily sold in such market. Nearly all securities which are acquired by the Trust directly from the issuers and shares into which such securities may be converted or which may be purchased on the exercise of warrants attached to such securities will be subject to legal or contractual delays in, or restrictions on, resale and will therefore be "restricted securities". Generally speaking, as contrasted with open-market sales of unrestricted securities, which may be effected immediately if the market is adequate, absent an exemption from registration, restricted securities can be sold only in a public offering for which a registration statement is in effect under the Securities Act of 1933, as amended (the "1933 Act"). The value of restricted securities, and of any other assets for which there are no reliable market quotations, is the fair value as determined in good faith by the Trust's Board of Trustees (the "Trustees"). Each restricted security is valued by the Trustees as of the time of its acquisition and at least quarterly thereafter. The Trustees have established guidelines to aid in the valuation of each security. Generally, restricted securities are initially valued at cost or less at the time of acquisition by the Trust. Values greater or less than cost are thereafter used for restricted securities in appropriate circumstances. Among the factors ordinarily considered are the existence of restrictions upon the sale of a security held by the Trust; an estimate of the existence and the extent of a market for the security; the extent of any discount at which the security was acquired; the estimated period of time during which the security will not be freely marketable; the estimated expenses of registering or otherwise qualifying the security for public sale; estimated underwriting commissions if underwriting would be required to effect a sale; in the case of a convertible security, whether or not it would trade on the basis of its stock equivalent; in the case of a debt obligation which would trade independently of any equity equivalent, the current yields on comparable securities; the estimated amount of the floating supply of such securities available for purchase; the proportion of the issue held by the Trust; changes in the financial condition and prospects of the issuer; the existence of merger proposals or tender offers affecting the issuer; and any other factors affecting fair value, all in accordance with the Investment Company Act of 1940, as amended (the "1940 Act"). In making valuations, opinions of counsel may be relied upon as to whether or not securities are restricted securities and as to the legal requirements for public sale. When market quotations are readily available for unrestricted securities of an issuer, restricted securities of the same class are generally valued at a discount from the market price of such unrestricted securities. The Trustees, however, consider all factors in fixing any discount, including the filing of a registration statement for such securities under the 1933 Act and any other developments which are likely to increase the probability that the securities may be publicly sold by the Trust without restriction. The Trustees meet at least once in each quarter to approve the value of the Trust's portfolio securities as of the close of business on the last business day of the preceding quarter. This valuation requires the approval of a majority of the Trustees of the Trust, including a majority of the Trustees who are not interested persons of the Trust or of Babson Capital. In making valuations, the Trustees will consider Babson Capital's reports analyzing each portfolio security in accordance with the relevant factors referred to above. Babson Capital has agreed to provide such reports to the Trust at least quarterly. The consolidated financial statements include private placement restricted securities valued at $97,416,793 (74.93% of net assets) as of March 31, 2007 whose values have been determined by the Trustees in the absence of readily ascertainable market values. Due to the inherent uncertainty of valuation, those values may differ significantly from the values that would have been used had a ready market for the securities existed, and the differences could be material. -------------------------------------------------------------------------------- 30 NOTES TO CONSOLIDATED FINANCIAL STATEMENTS MASSMUTUAL PARTICIPATION INVESTORS (CONTINUED) The values for Rule 144A restricted securities and corporate public securities are stated at the last reported sales price or at prices based upon quotations obtained from brokers and dealers as of March 31, 2007, subject to discount where appropriate, and are approved by the Trustees. Short-term securities with more than sixty days to maturity are valued at fair value and short-term securities having a maturity of sixty days or less are valued at amortized cost, which approximates market value. B. ACCOUNTING FOR INVESTMENTS: Investment transactions are accounted for on the trade date. Dividend income is recorded on the ex-dividend date. Interest income is recorded on the accrual basis including the amortization of premiums and accretion of discount on bonds held using the yield-to-maturity method. The Trust does not accrue income when payment is delinquent and when management believes payment is questionable. Realized gains and losses on investment transactions and unrealized appreciation and depreciation of investments are reported for financial statement and federal income tax purposes on the identified cost method. C. USE OF ESTIMATES: The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. D. FEDERAL INCOME TAXES: The Trust has elected to be taxed as a "regulated investment company" under the Internal Revenue Code, and intends to maintain this qualification, and to distribute substantially all of its net taxable income to its shareholders. In any year when net long-term capital gains are realized by the Trust, management, after evaluating the prevailing economic conditions, will recommend that Trustees either designate the net realized long-term gains as undistributed and pay the federal capital gains taxes thereon, or distribute all or a portion of such net gains. The Trust is taxed as a regulated investment company and is therefore limited as to the amount of non-qualified income that it may receive as the result of operating a trade or business, e.g. the Trust's pro rata share of income allocable to the Trust by a partnership operating company. The Trust's violation of this limitation could result in the loss of its status as a regulated investment company, thereby subjecting all of its net income and capital gains to corporate taxes prior to distribution to its shareholders. The Trust, from time-to-time, identifies investment opportunities in the securities of entities that could cause such trade or business income to be allocable to the Trust. The MMPI Subsidiary Trust (described in Footnote 1, above) was formed in order to allow investment in such securities without adversely affecting the Trust's status as a regulated investment company. The MMPI Subsidiary Trust is not taxed as a regulated investment company. Accordingly, prior to the Trust's receiving any distributions from the MMPI Subsidiary Trust, all of the MMPI Subsidiary Trust's taxable income and realized gains, including non-qualified income and realized gains, is subject to taxation at prevailing corporate tax rates. For the three months ended March 31, 2007, the MMPI Subsidiary Trust has reduced accrued deferred tax income expenses on net unrealized gains by $131,824. In June 2006, the Financial Accounting Standards Board ("FASB") issued FASB Interpretation No. 48, Accounting for Uncertainty in Income Taxes - an interpretation of FASB statement 109 ("FIN 48"). FIN 48 supplements FASB 109 by prescribing a recognition threshold and measurement attribute for the financial statement recognition and measurement of a tax position taken or expected to be taken in a tax return. The adoption of FIN 48 requires financial statements to be adjusted to reflect only those tax positions that are more likely than not to be sustained as of the adoption date. As of March 31, 2007, the Trust has properly recorded all tax liabilities. E. DISTRIBUTIONS TO SHAREHOLDERS: The Trust records distributions to shareholders from net investment income and net realized gains, if any, on the exdividend date. The Trust's net investment income dividend is declared four times per year, in April, July, October and December. The Trust's net realized capital gain distribution, if any, is declared in December. F. EXPENSE REDUCTION: Citibank, N.A. ("Citibank") serves as custodian to the Trust. Pursuant to the custodian agreement, Citibank receives a fee reduced by credits on cash balances the Trust maintains with Citibank. All credit balances, if any, used to reduce the Trust's custodian fees are reported as fees paid indirectly on the Statement of Operations. For the three months ended March 31, 2007, there were no credit balances used to reduce custodian fees. 3. INVESTMENT ADVISORY AND ADMINISTRATIVE SERVICES FEE A. SERVICES: Under an Investment Advisory and Administrative Services Contract (the "Contract") with the Trust, Babson Capital has agreed to use its best efforts to present to the Trust a continuing and suitable investment program consistent with the investment objectives and policies of the Trust. Babson Capital represents the Trust in any negotiations with issuers, investment banking firms, securities brokers or dealers and other institutions or investors relating to the Trust's investments. Under the Contract, Babson Capital also provides -------------------------------------------------------------------------------- 31 NOTES TO CONSOLIDATED FINANCIAL STATEMENTS MASSMUTUAL PARTICIPATION INVESTORS (CONTINUED) administration of the day-to-day operations of the Trust and provides the Trust with office space and office equipment, accounting and bookkeeping services, and necessary executive, clerical and secretarial personnel for the performance of the foregoing services. B. FEE: For its services under the Contract, Babson Capital is paid a quarterly investment advisory fee equal to .225% of the value of the Trust's net assets as of the last business day of each fiscal quarter, an amount approximately equivalent to .90% on an annual basis. A majority of the Trustees, including a majority of the Trustees who are not interested persons of the Trust or of Babson Capital, approve the valuation of the Trust's net assets as of such day. 4. SENIOR SECURED INDEBTEDNESS A. NOTE PAYABLE: MassMutual holds the Trust's $12,000,000 Senior Fixed Rate Convertible Note (the "Note") issued by the Trust in 1995. The Note, as amended, is due December 13, 2011 and accrues interest at 5.80% per annum. MassMutual, at its option, can convert the principal amount of the Note into common shares. The dollar amount of principal would be converted into an equivalent dollar amount of common shares based upon the average price of the common shares for ten business days prior to the notice of conversion. For the three months ended March 31, 2007, the Trust incurred total interest expense on the Note of $174,000. The Trust may redeem the Note, in whole or in part, at the principal amount proposed to be redeemed together with the accrued and unpaid interest thereon through the redemption date plus a Make Whole Premium. The Make Whole Premium equals the excess of (i) the present value of the scheduled payments of principal and interest which the Trust would have paid but for the proposed redemption, discounted at the rate of interest of U.S. Treasury obligations whose maturity approximates that of the Note plus 0.50% over (ii) the principal of the Note proposed to be redeemed. B. REVOLVING CREDIT AGREEMENT: The Trust entered into a $15,000,000 Revolving Credit Agreement with Bank of America (formerly Fleet National Bank) (the "Agent Bank") dated May 29, 1997, which had a stated maturity date of May 31, 2004. The maturity date of this loan was extended to May 31, 2007, and its terms amended and restated pursuant to the First Amended and Restated Revolving Credit Agreement (the "Revolver") dated May 27, 2004, between the Trust and the Agent Bank. The Revolver bears interest payable quarterly in arrears at a per annum rate that varies depending upon whether the Trust requests a Base Rate Loan or LIBOR Rate Loan. Interest on Base Rate loans equals the higher of: (i) the annual "Base Rate" as set periodically by the Agent Bank and (ii) the most recent Federal Funds Effective Rate plus .50% per annum. Per annum interest on LIBOR Rate Loans equals .60% plus the London Inter Bank Offered Rate ("LIBOR") rate, divided by 1 minus LIBOR Reserve Rate. The Trust also incurs expense on the undrawn portion of the total Revolver at a rate of .25% per annum. As of March 31, 2007, there were no outstanding loans against the Revolver. For the three months ended March 31, 2007, the Trust incurred expense on the Revolver of $9,247 related to the undrawn portion. 5. PURCHASES AND SALES OF INVESTMENTS FOR THE THREE MONTHS ENDED 3/31/2007 COST OF PROCEEDS FROM INVESTMENTS SALES OR ACQUIRED MATURITIES -------- ---------- Corporate restricted securities $ 8,127,408 $ 4,633,336 Corporate public securities 1,898,079 6,869,234 The aggregate cost of investments is substantially the same for financial reporting and federal income tax purposes as of March 31, 2007. The net unrealized appreciation of investments for financial reporting and federal tax purposes as of March 31, 2007 is $1,649,820 and consists of $14,172,177 appreciation and $12,522,357 depreciation. Net unrealized appreciation of investments on the Statement of Assets and Liabilities reflects the balance net of a deferred tax accrual of $252,402 on net unrealized gains in the MMPI Subsidiary Trust. 6. NEW ACCOUNTING PRONOUNCEMENTS In September 2006, FASB issued Statement of Financial Accounting Standards No. 157, Fair Value Measurements ("FAS 157"). FAS 157 establishes a single authoritative definition of fair value, establishes a framework for measuring fair value and expands disclosures about fair value measurements. FAS 157 applies to fair value measurements already required or permitted by existing standards. The change to current generally accepted accounting principles from the application of FAS 157 relates to the definition of fair value, the methods used to measure fair value, and the expanded disclosures about fair value measurements. Management of the Trust does not believe the adoption of FAS 157 will materially impact the financial statement amounts, however, additional disclosures may be required about the inputs used to develop the measurements and the effect of certain of the measurements on changes in net assets for the period. FAS 157 is effective for financial statements issued for fiscal years beginning after November 15, 2007 and interim periods within those fiscal years. -------------------------------------------------------------------------------- 32 TRUSTEES OFFICERS William J. Barrett Roger W. Crandall Chairman Donald E. Benson* Clifford M. Noreen President Michael H. Brown James M. Roy Vice President & Chief Financial Officer Roger W. Crandall Rodney J. Dillman Vice President & Donald Glickman Secretary Martin T. Hart* Jill A. Fields Vice President Robert E. Joyal Michael P. Hermsen Vice President Corine T. Norgaard* Mary Wilson Kibbe Vice President Michael L. Klofas Vice President Richard E. Spencer, II Vice President * MEMBER OF THE AUDIT Ronald S. Talala Treasurer COMMITTEE John T. Davitt, Jr. Comptroller Melissa M. LaGrant Chief Compliance Officer -------------------------------------------------------------------------------- DIVIDEND REINVESTMENT AND CASH PURCHASE PLAN MassMutual Participation Investors offers a Dividend Reinvestment and Cash Purchase Plan. The Plan provides a simple and automatic way for shareholders to add to their holdings in the Trust through the receipt of dividend shares issued by the Trust or through the reinvestment of cash dividends in Trust shares purchased in the open market. The dividends of each shareholder will be automatically reinvested in the Trust by Shareholder Financial Services Inc., the Transfer Agent, in accordance with the Plan, unless such shareholder elects not to participate by providing written notice to the Transfer Agent. A shareholder may terminate his or her participation by notifying the Transfer Agent in writing. Participating shareholders may also make additional contributions to the Plan from their own funds. Such contributions may be made by personal check or other means in an amount not less than $100 nor more than $5,000 per quarter. Cash contributions must be received by the Transfer Agent at least five days (but no more then 30 days) before the payment date of a dividend or distributions. Whenever the Trust declares a dividend payable in cash or shares, the Transfer Agent, acting on behalf of each participating shareholder, will take the dividend in shares only if the net asset value is lower than the market price plus an estimated brokerage commission as of the close of business on the valuation day. The valuation day is the last day preceding the day of dividend payment. When the dividend is to be taken in shares, the number of shares to be received is determined by dividing the cash dividend by the net asset value as of the close of business on the valuation date or, if greater than net asset value, 95% of the closing share price. If the net asset value of the shares is higher than the market value plus an estimated commission, the Transfer Agent, consistent with obtaining the best price and execution, will buy shares on the open market at current prices promptly after the dividend payment date. The reinvestment of dividends does not, in any way, relieve participating shareholders of any federal, state or local tax. For federal income tax purposes, the amount reportable in respect of a dividend received in newly-issued shares of the Trust will be the fair market value of the shares received, which will be reportable as ordinary income and/or capital gains. As compensation for its services, the Transfer Agent receives a fee of 5% of any dividend and cash contribution (in no event in excess of $2.50 per distribution per shareholder.) Any questions regarding the Plan should be addressed to Shareholder Financial Services, Inc., Agent for MassMutual Participation Investors' Dividend Reinvestment and Cash Purchase Plan, P.O. Box 173673, Denver CO 80217-3673. MassMutual Participation Investors DB1040 407