================================================================================ UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM N-Q Quarterly Schedule of Portfolio Holdings of Registered Management Investment Company Investment Company Act file number 811-05531 MassMutual Participation Investors -------------------------------------------------------------------------------- (Exact name of registrant as specified in charter) 1500 Main Street, Suite 600, Springfield, MA 01115 -------------------------------------------------------------------------------- (Address of principal executive offices) (Zip code) Stephen L. Kuhn, Vice President and Secretary, 1500 Main Street, Suite 2800, Springfield, MA 01115 -------------------------------------------------------------------------------- (Name and address of agent for service) Registrant's telephone number, including area code: 413-226-1000 ___________________ Date of fiscal year end: 12/31 ___________________ Date of reporting period: 03/31/05 ___________________ ================================================================================ ITEM 1. SCHEDULE OF INVESTMENTS. CONSOLIDATED SCHEDULE OF INVESTMENTS MASSMUTUAL PARTICIPATION INVESTORS March 31, 2005 (Unaudited) Shares, Units, Warrants, Ownership or Acquisition CORPORATE RESTRICTED SECURITIES - 83.83% (A) Principal Amount Date Cost Fair Value ---------------- ----------- ------------ ------------ PRIVATE PLACEMENT INVESTMENTS - 76.80% 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 $ 1,066,349 Warrant, exercisable until 2012, to purchase common stock at $.01 per share (B) 1,230 shs. 04/08/04 -- 12 ------------ ------------ 1,125,000 1,066,361 ------------ ------------ A W C HOLDING COMPANY A manufacturer and distributor of aluminum and vinyl windows and doors in the Southwest and Southeast regions of the U.S. 12% Senior Subordinated Note due 2012 $ 1,125,000 05/18/04 1,019,489 1,041,909 Limited Partnership Interest of AWC Investment, LLC (B) 132 uts. 05/18/04 112,500 101,252 ------------ ------------ 1,131,989 1,143,161 ------------ ------------ ADORN, INC. A manufacturer of wall panels, cabinets, moldings and countertops for houses and recreational vehicles. 12.5% Subordinated Note due 2010 $ 1,125,000 02/29/00 1,027,644 1,125,000 Warrant, exercisable until 2010, to purchase common stock at $.02 per share (B) 192 shs. 02/29/00 162,931 161,625 ------------ ------------ 1,190,575 1,286,625 ------------ ------------ AMERICA'S BODY COMPANY, INC./LCP HOLDING CO. A designer and manufacturer of commercial work vehicles. 12% Preferred Stock Series C (B) 197 shs. 12/16/03 875,000 1,750,000 Warrant, exercisable until 2007, to purchase common stock at $.01 per share (B) 40 shs. * 256,667 -- ------------ ------------ 1,131,667 1,750,000 ------------ ------------ 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 1,005,081 1,158,750 Preferred Class A Unit (B) 1,337 uts. 01/22/04 133,700 120,330 Common Class B Unit (B) 1,610 uts. 01/22/04 -- 126,799 ------------ ------------ 1,138,781 1,405,879 ------------ ------------ AUGUSTA SPORTSWEAR HOLDING CO. A manufacturer and distributor of athletic apparel, activewear and team uniforms. 12% Senior Subordinated Note due 2012 $ 893,000 12/31/04 830,899 895,532 Common Stock (B) 261 shs. ** 261,000 234,900 Warrant, exercisable until 2012, to purchase common stock at $.01 per share (B) 73 shs. 12/31/04 63,254 1 ------------ ------------ 1,155,153 1,130,433 ------------ ------------ *11/02/98 and 12/24/03. **12/31/04 and 03/31/05. -------------------------------------------------------------------------------- 7 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL PARTICIPATION INVESTORS March 31, 2005 (Unaudited) Shares, Units, Warrants, Ownership or Acquisition CORPORATE RESTRICTED SECURITIES (A) (CONTINUED) Principal Amount Date Cost Fair Value ---------------- ----------- ------------ ------------ BEACON MEDICAL PRODUCTS, INC. A designer, manufacturer and marketer of medical air and gas distribution systems. Senior Secured Floating Rate Revolving Credit Facility due 2007 $ 131,792 04/09/02 $ 131,792 $ 131,628 Senior Secured Tranche A Floating Rate Note due 2008 $ 466,242 04/09/02 466,242 461,631 12% Senior Secured Note due 2010 $ 412,112 04/09/02 356,647 431,668 Limited Partnership Interest of Riverside Capital Appreciation Fund IV, L.P. (B) 6.38% int. 04/09/02 87,045 80,691 Warrant, exercisable until 2010, to purchase common stock at $.01 per share (B) 794 shs. 04/09/02 72,856 73,635 ------------ ------------ 1,114,582 1,179,253 ------------ ------------ 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 -- ------------ ------------ BETTER MINERALS & AGGREGATES A producer of high grade industrial and specialty silica sands. 14% Redeemable Preferred Stock (B) 499 shs. 09/30/99 272,912 54,525 Convertible Preferred Stock Series A and B, convertible into common stock at $9.26 per share (B) 62,997 shs. 12/19/96 583,300 -- Common Stock (B) 10,013 shs. 09/30/99 399,505 -- Warrants, exercisable until 2005 and 2010, to purchase common stock at $.01 per share (B) 5,700 shs. * 64,247 -- ------------ ------------ 1,319,964 54,525 ------------ ------------ BRAMPTON FASTENER CO. LTD A value-added national distributor of maintenance, repair and operating supplies such as fasteners, electrical components and tools. 8% Senior Secured Term A Note due 2009 $ 420,000 12/31/04 420,000 342,720 12% Senior Secured Term B Note due 2009 $ 430,000 12/31/04 430,000 439,030 Limited Partnership Interest of Brafasco Investors LLC (B) 44,000 uts. 12/31/04 44,000 39,600 Preferred Stock (B) 155 shs. 12/31/04 -- 77,500 Warrant of G C-Sun Holdings L.P., exercisable until 2008, to purchase common stock at $.01 per share (B) 469 shs. 03/02/00 185,220 -- ------------ ------------ 1,079,220 898,850 ------------ ------------ C & M CONVEYOR, INC. A manufacturer and supplier of material handling systems to the corrugated sheet and container industry. 9.5% Senior Secured Term Note due 2007 $ 569,277 09/13/02 569,277 574,709 11% Senior Subordinated Note due 2010 $ 478,916 09/13/02 456,261 488,532 Common Stock (B) 180,723 shs. 09/13/02 180,723 144,578 Warrant, exercisable until 2010, to purchase common stock at $.01 per share (B) 78,386 shs. 09/13/02 34,428 784 ------------ ------------ 1,240,689 1,208,603 ------------ ------------ *12/19/96 and 09/30/99. -------------------------------------------------------------------------------- 8 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL PARTICIPATION INVESTORS March 31, 2005 (Unaudited) Shares, Units, Warrants, Ownership or Acquisition CORPORATE RESTRICTED SECURITIES (A) (CONTINUED) Principal Amount Date Cost Fair Value ---------------- ----------- ------------ ------------ CAINS FOODS, L.P. A producer of mayonnaise and sauce products for both the retail and food service markets. Limited Partnership Interest (B) 58 uts. 09/29/95 $ 79,184 $ 250,288 ------------ ------------ 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 pharmaceuticals products. Common Stock (B) 55 shs. * 252 252 ------------ ------------ CHEMED CORPORATION An operator in the residential and commercial repair-and maintenance service industry through two wholly owned subsidiaries, Roto-Rooter and Service America Common Stock 10,500 shs. 02/24/04 525,000 803,040 ------------ ------------ COEUR, INC. A producer of proprietary, disposable power injection syringes. Senior Secured Floating Rate Revolving Credit Facility due 2010 $ 25,363 02/02/05 25,363 24,983 8.75% Senior Secured Term Note due 2010 $ 326,087 04/30/03 326,087 334,281 11.5% Senior Subordinated Note due 2011 $ 242,754 04/30/03 223,004 249,103 Common Stock (B) 72,463 shs. 04/30/03 72,463 65,217 Warrant, exercisable until 2010, to purchase common stock at $.01 per share (B) 50,099 shs. 04/30/03 23,317 501 ------------ ------------ 670,234 674,085 ------------ ------------ COINING CORPORATION OF AMERICA LLC A manufacturer of close tolerance parts and metal stampings. Senior Secured Floating Rate Revolving Credit Facility due 2006 $ 80,247 01/07/02 80,247 78,364 Senior Secured Floating Rate Tranche A Note due 2007 $ 552,469 06/26/01 552,469 513,993 13% Senior Secured Tranche B Note due 2006 $ 370,370 06/26/01 370,370 360,120 Limited Partnership Interest (B) 3.65% int. 06/26/01 185,185 148,148 Warrant, exercisable until 2008, to purchase common stock at $.01 per share (B) 61,163 shs. 06/26/01 45,370 612 ------------ ------------ 1,233,641 1,101,237 ------------ ------------ *12/30/97 and 05/29/99. -------------------------------------------------------------------------------- 9 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL PARTICIPATION INVESTORS March 31, 2005 (Unaudited) Shares, Units, Warrants, Ownership or Acquisition CORPORATE RESTRICTED SECURITIES (A) (CONTINUED) Principal Amount Date Cost Fair Value ---------------- ----------- ------------ ------------ COLIBRI HOLDINGS CORPORATION A manufacturer and distributor of wild bird feeders and accessories. 12.5% Senior Subordinated Note due 2008 $ 843,750 09/22/00 $ 760,804 $ 801,273 28% Preferred Stock (B) 38 shs. 11/02/01 37,500 40,326 20% Preferred Stock (B) 35 shs. 03/09/04 35,156 31,156 Common Stock (B) 756 shs. 09/22/00 281,250 140,625 Warrant, exercisable until 2008, to purchase common stock at $.01 per share (B) 446 shs. 09/22/00 140,625 4 ------------ ------------ 1,255,335 1,013,384 ------------ ------------ 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 $ 1,059,417 * 975,790 1,040,382 Limited Partnership Interest (B) 103,135 uts. ** 103,135 92,821 Warrant, exercisable until 2012, to purchase common stock at $.01 per share (B) 92 shs. * 84,829 1 ------------ ------------ 1,163,754 1,133,204 ------------ ------------ CORVEST GROUP, INC. A manufacturer and distributor of promotional products. 12% Senior Subordinated Note due 2007 $ 2,045,455 *** 1,991,522 1,840,910 Common Stock (B) 30 shs. *** 51,136 12,784 Limited Partnership Interest (B) 10.23% int. *** 150,810 37,955 Warrant, exercisable until 2007, to purchase common stock at $.01 per share (B) 171 shs. *** 157,343 73,721 ------------ ------------ 2,350,811 1,965,370 ------------ ------------ DELSTAR HOLDING CORPORATION A manufacturer of plastic netting for a wide variety of industries. Convertible Preferred Stock, convertible into common stock at $10 per share (B) 1,758 shs. 10/05/01 213,691 197,751 Convertible Preferred Stock, convertible into common stock at $11.89 per share (B) 206 shs. 09/16/04 24,414 23,193 ------------ ------------ 238,105 220,944 ------------ ------------ DEXTER MAGNETICS TECHNOLOGIES, INC. A designer, fabricator, assembler and distributor of industrial magnets and subassemblies in North America and Europe. 12% Senior Subordinated Note due 2006 $ 81,522 07/19/01 76,024 81,633 Common Stock (B) 310 shs. 07/19/01 309,783 331,077 Warrant, exercisable until 2006, to purchase common stock at $.01 per share (B) 157 shs. 07/19/01 132,677 167,804 ------------ ------------ 518,484 580,514 ------------ ------------ *08/12/04 and 01/18/05. **08/12/04 and 01/14/05. ***03/05/99 and 03/24/99. -------------------------------------------------------------------------------- 10 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL PARTICIPATION INVESTORS March 31, 2005 (Unaudited) Shares, Units, Warrants, Ownership or Acquisition CORPORATE RESTRICTED SECURITIES (A) (CONTINUED) Principal Amount Date Cost Fair Value ---------------- ----------- ------------ ------------ DIRECTED ELECTRONICS, INC. A designer and distributor of brand name automotive security systems, audio products and installation accessories. Class B Common Stock (B) 19,394 shs. 12/22/99 $ -- $ 296,723 Limited Partnership Interest (B) 4.61% int. 12/22/99 1 444,618 Warrant, exercisable until 2007, to purchase common stock at $.01 per share (B) 25,713 shs. 12/22/99 -- 393,407 ------------ ------------ 1 1,134,748 ------------ ------------ 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 1,044,048 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 1,044,048 ------------ ------------ DWYER GROUP, INC. A franchiser of a variety of home repair services. 14% Senior Subordinated Note due 2011 $ 984,375 10/30/03 895,277 1,010,420 Common Stock (B) 3,656 shs. ** 365,600 329,040 Warrant, exercisable until 2011, to purchase common stock at $.01 per share (B) 1,077 shs. 10/30/03 98,719 11 ------------ ------------ 1,359,596 1,339,471 ------------ ------------ E X C ACQUISITION CORPORATION A manufacturer of pre-filled syringes and pump systems used for intravenous drug delivery. 15% Senior Subordinated Note due 2012 $ 1,142,078 06/28/04 1,103,704 1,187,761 Warrant, exercisable until 2014, to purchase common stock at $.01 per share (B) 11 shs. 06/28/04 40,875 -- ------------ ------------ 1,144,579 1,187,761 ------------ ------------ EAGLE PACK PET FOODS, INC. A manufacturer of premium pet food sold through independent pet stores. 14% Senior Subordinated Note due 2011 $ 562,500 09/24/04 542,523 561,272 Warrant, exercisable until 2011, to purchase common stock at $.01 per share (B) 2,163 shs. 09/24/04 20,893 22 ------------ ------------ 563,416 561,294 ------------ ------------ EAGLE WINDOW & DOOR HOLDING CO. A manufacturer of wood and aluminum-clad wood windows and doors. 12% Senior Subordinated Note due 2010 $ 1,000,000 05/06/02 885,694 1,030,000 Common Stock (B) 125 shs. 05/06/02 125,000 272,250 Warrant, exercisable until 2010, to purchase common stock at $.01 per share (B) 232 shs. 05/06/02 150,000 505,165 ------------ ------------ 1,160,694 1,807,415 ------------ ------------ *10/24/96 and 08/28/98. **10/30/03 and 01/02/04. -------------------------------------------------------------------------------- 11 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL PARTICIPATION INVESTORS March 31, 2005 (Unaudited) Shares, Units, Warrants, Ownership or Acquisition CORPORATE RESTRICTED SECURITIES (A) (CONTINUED) Principal Amount Date Cost Fair Value ---------------- ----------- ------------ ------------ EAST RIVER VENTURES I, L.P. An acquirer of controlling or substantial interests in other entities. Limited Partnership Interest (B) 0.04% int. 01/01/01 $ 7,238 $ 6,821 ------------ ------------ ENZYMATIC THERAPY, INC. A manufacturer and distributor of branded natural medicines and nutritional supplements. 13% Senior Subordinated Note due 2006 (B) $ 843,750 09/17/02 714,590 506,250 Limited Partnership Interest (B) 0.70% int. 03/30/00 281,250 2,813 Warrant, exercisable until 2009, to purchase common stock at $.01 per share (B) 253 shs. 03/30/00 135,000 3 ------------ ------------ 1,130,840 509,066 ------------ ------------ EURO-PRO CORPORATION A designer, marketer and distributor of floor care, steam cleaning and small kitchen products and appliances. 13.25% Senior Subordinated Note due 2011 $ 1,125,000 09/09/03 1,108,364 891,432 Warrant, exercisable until 2011, to purchase common stock at $.01 per share (B) 23,229 shs. 09/09/03 18,869 232 ------------ ------------ 1,127,233 891,664 ------------ ------------ EVANS CONSOLES, INC. A designer and manufacturer of consoles and control center systems. 10% Senior Secured Note due 2006 $ 68,418 05/06/04 68,418 68,418 Limited Partnership Interest of CM Equity Partners (B) 1.21% int. 02/11/98 64,535 -- Common Stock (B) 45,000 shs. 05/06/04 6 -- ------------ ------------ 132,959 68,418 ------------ ------------ 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 96,320 681 ------------ ------------ 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 * 980,419 1,098,615 Common Stock (B) 33 shs. * 33,216 29,898 Warrant, exercisable until 2012, to purchase common stock at $.01 per share (B) 106 shs. * 105,618 1 ------------ ------------ 1,119,253 1,128,514 ------------ ------------ HUSSEY SEATING CORPORATION A manufacturer of spectator seating products. Senior Secured Floating Rate Revolving Note due 2006 $ 1,054,767 06/12/96 1,054,767 527,384 Senior Secured Floating Rate Note due 2006 $ 216,563 ** 216,563 108,281 12% Senior Subordinated Note due 2006 $ 675,000 03/31/03 675,000 6,750 Common Stock (B) 2,860 shs. 03/12/04 112,500 -- ------------ ------------ 2,058,830 642,415 ------------ ------------ *06/30/04 and 08/19/04. **06/12/96 and 08/03/01. -------------------------------------------------------------------------------- 12 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL PARTICIPATION INVESTORS March 31, 2005 (Unaudited) Shares, Units, Warrants, Ownership or Acquisition CORPORATE RESTRICTED SECURITIES (A) (CONTINUED) Principal Amount Date Cost Fair Value ---------------- ----------- ------------ ------------ INTEGRATION TECHNOLOGY SYSTEMS, INC. A manufacturer of steel protective computer and network systems for the industrial and office environments. 16.5% Senior Secured Note due 2006 $ 922,049 03/01/04 $ 920,761 $ 878,067 Common Stock (B) 130 shs. 06/01/00 149,500 29,900 ------------ ------------ 1,070,261 907,967 ------------ ------------ JASON, INC. A diversified manufacturing company serving various industrial markets. 13% Senior Subordinated Note due 2008 $ 510,187 08/04/00 474,192 503,765 14% Cumulative Redeemable Preferred Stock Series A (B) 153 shs. 08/04/00 153,119 150,617 Limited Partnership Interest of Saw Mill Capital Fund II, L.P. (B) 1.30% int. 08/03/00 469,275 351,995 Warrants, exercisable until 2008 and 2009, to purchase common stock at $.01 per share (B) 26,931 shs. 08/04/00 61,101 24,844 ------------ ------------ 1,157,687 1,031,221 ------------ ------------ JUSTRITE MANUFACTURING ACQUISITION CO. A manufacturer of safety products such as storage cabinets and containers. 12% Senior Subordinated Note due 2011 $ 843,750 12/15/04 791,516 837,507 Warrant, exercisable until 2011, to purchase common stock at $.01 per share (B) 593 shs. 12/15/04 53,528 6 ------------ ------------ 845,044 837,513 ------------ ------------ KEEPSAKE QUILTING, INC. A seller of quilting fabrics, books, patterns, kits and notions to consumers. Senior Secured Floating Rate Revolving Note due 2005 $ 20,967 06/16/00 20,967 20,959 Senior Secured Floating Rate Tranche A Note due 2007 $ 348,581 06/16/00 348,581 346,029 12% Senior Secured Tranche B Note due 2008 $ 314,509 06/16/00 300,666 323,944 Limited Partnership Interest of Riverside XVI Holding Company, L.P. (B) 3.02% int. 06/12/00 190,563 142,886 Warrant, exercisable until 2008, to purchase common stock at $.01 per share (B) 633 shs. 06/12/00 26,209 47,463 ------------ ------------ 886,986 881,281 ------------ ------------ KELE AND ASSOCIATES, INC. A distributor of building automation control products. 12% Senior Subordinated Note due 2012 $ 969,643 02/27/04 883,599 967,686 Common Stock (B) 18 shs. 02/27/04 244,608 262,127 Warrant, exercisable until 2012, to purchase common stock at $.01 per share (B) 6 shs. 02/27/04 4,124 -- ------------ ------------ 1,132,331 1,229,813 ------------ ------------ KENAN-ADVANTAGE TRANSPORT COMPANY A transporter of light petroleum, petrochemicals, lubricants and residual fuels. 12.5% Senior Subordinated Note due 2009 $ 962,170 04/30/01 962,170 981,413 Preferred Stock (B) 163 shs. 04/30/01 163,000 326,000 Warrant, exercisable until 2009, to purchase common stock at $.01 per share (B) 142 shs. 04/30/01 7 1 ------------ ------------ 1,125,177 1,307,414 ------------ ------------ -------------------------------------------------------------------------------- 13 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL PARTICIPATION INVESTORS March 31, 2005 (Unaudited) Shares, Units, Warrants, Ownership or Acquisition CORPORATE RESTRICTED SECURITIES (A) (CONTINUED) Principal Amount Date Cost Fair Value ---------------- ----------- ------------ ------------ KEYSTONE NORTH AMERICA, INC. An operator of funeral homes in North America. Common Stock (B) 28,577 shs. 02/08/05 $ 137,444 $ 173,177 ------------ ------------ LANCASTER LABORATORIES, INC. A laboratory testing operation in the United States. Common Stock (B) 455,739 shs. 09/25/00 312,254 810,076 ------------ ------------ 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 $ 2,036,000 * 1,849,254 2,048,254 Common Stock (B) 3,057 shs. * 213,998 171,192 Warrant, exercisable until 2006, to purchase common stock at $.11 per share (B) 8,245 shs. * 318,838 461,720 ------------ ------------ 2,382,090 2,681,166 ------------ ------------ MAVERICK ACQUISITION COMPANY A manufacturer of capsules that cover the cork and neck of wine bottles. Senior Secured Floating Rate Revolving Note due 2009 $ 13,433 02/17/05 13,433 13,312 Senior Secured Floating Rate Tranche A Note due 2010 $ 447,762 09/03/04 447,762 442,699 12% Senior Secured Tranche B Note due 2011 $ 179,104 09/03/04 157,620 182,731 Limited Partnership Interest (B) 4.48% int. 09/03/04 33,582 30,224 Warrant, exercisable until 2011, to purchase common stock at $.01 per share (B) 243 shs. 09/03/04 22,556 2 ------------ ------------ 674,953 668,968 ------------ ------------ MAXON CORPORATION A manufacturer of industrial combustion equipment and related shut-off valves and control valves. 12% Senior Subordinated Note due 2012 $ 549,837 09/30/04 499,814 544,044 8.75% Senior Subordinated Note due 2012 $ 732,065 09/30/04 732,065 732,065 Common Stock (B) 218,099 shs. 09/30/04 218,099 196,289 Warrant, exercisable until 2012, to purchase common stock at $.01 per share (B) 87,755 shs. 09/30/04 51,941 878 ------------ ------------ 1,501,919 1,473,276 ------------ ------------ MEDASSIST, INC. A provider of patient eligibility and accounts receivable management services to hospitals and physician practices. 12% Senior Subordinated Note due 2011 $ 1,125,000 05/01/03 1,106,972 1,158,750 8% Preferred Stock (B) 44 shs. 10/28/04 44,289 44,055 Common Stock (B) 13,863 shs. 10/28/04 18,576 18,964 Warrant, exercisable until 2013, to purchase common stock at $.01 per share (B) 44,054 shs. 05/01/03 21,534 60,266 ------------ ------------ 1,191,371 1,282,035 ------------ ------------ *12/23/98 and 01/28/99. -------------------------------------------------------------------------------- 14 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL PARTICIPATION INVESTORS March 31, 2005 (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. Senior Secured Floating Rate Revolving Note due 2007 $ 57,660 03/24/05 $ 57,660 $ 57,660 Senior Secured Floating Rate Tranche A Note due 2007 $ 486,355 09/21/00 486,355 486,355 12% Senior Secured Tranche B Note due 2008 $ 192,200 09/21/00 181,663 192,200 Limited Partnership Interest of Riverside Capital Appreciation Fund I, L.P. (B) 21.37% int. * 178,069 222,576 Warrant, exercisable until 2008, to purchase common stock at $100 per share (B) 264 shs. 09/21/00 23,064 10,997 ------------ ------------ 926,811 969,788 ------------ ------------ MUSTANG VENTURES COMPANY A natural gas gathering and processing operation located in Oklahoma and Texas. Warrant, exercisable until 2012, to purchase common stock at $.01 per share (B) 8,752 shs. 12/11/02 261,264 451,727 ------------ ------------ NEFF MOTIVATION, INC. A manufacturer and distributor of customized awards and sportswear to schools. 12.5% Senior Subordinated Note due 2011 $ 562,500 01/31/03 481,533 582,240 Warrant, exercisable until 2011, to purchase common stock at $.01 per share (B) 112 shs. 01/31/03 95,625 46,025 ------------ ------------ 577,158 628,265 ------------ ------------ 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 1,026,000 10% Preferred Stock (B) 135 shs. 03/29/04 135,044 139,478 Common Stock (B) 3,418 shs. 03/29/04 3,418 3,076 Warrant, exercisable until 2012, to purchase common stock at $.01 per share (B) 4,565 shs. 03/29/04 3,877 46 ------------ ------------ 1,125,000 1,168,600 ------------ ------------ NPC, INC. A manufacturer of flexible connectors and equipment used in the installation of sewers and storm drain pipelines. Senior Secured Floating Rate Revolving Note due 2006 $ 186,513 06/25/99 186,513 183,930 Senior Secured Floating Rate Note due 2006 $ 1,075,424 06/25/99 1,075,409 1,059,905 12% Senior Secured Tranche B Note due 2007 $ 559,322 06/25/99 526,128 559,322 Limited Partnership Interest of Riverside XIII Holding Company L.P. (B) 1.93% int. 06/11/99 169,648 126,536 Warrant, exercisable until 2007, to purchase common stock at $.01 per share (B) 115 shs. 06/25/99 81,356 1 ------------ ------------ 2,039,054 1,929,694 ------------ ------------ *09/20/00 and 05/23/02. -------------------------------------------------------------------------------- 15 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL PARTICIPATION INVESTORS March 31, 2005 (Unaudited) Shares, Units, Warrants, Ownership or Acquisition CORPORATE RESTRICTED SECURITIES (A) (CONTINUED) Principal Amount Date Cost Fair Value ---------------- ----------- ------------ ------------ 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 $ 511,587 11.5% Senior Subordinated Note due 2012 $ 857,143 01/28/02 783,797 948,713 Common Stock (B) 178,571 shs. 01/28/02 178,571 186,428 Warrant, exercisable until 2012, to purchase common stock at $.01 per share (B) 138,928 shs. 01/28/02 92,597 143,790 ------------ ------------ 1,519,251 1,790,518 ------------ ------------ OLYMPIC SALES, INC. A boat retailer in Washington state, Oregon and California and British Columbia. 12% Senior Subordinated Note due 2006 $ 1,387,000 08/07/98 1,387,000 1,312,738 12% Senior Subordinated Note due 2008 $ 244,154 02/09/00 230,550 220,125 Limited Partnership Interest of Riverside VIII, VIII-A and VIII-B Holding Company, L.P. (B) 795,964 uts. * 808,274 415,321 Warrants, exercisable until 2007 and 2008, to purchase common stock at $.01 per share (B) 15,166 shs. ** 206,041 152 ------------ ------------ 2,631,865 1,948,336 ------------ ------------ 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 1,039,814 1,136,250 Membership Interests of MM/Lincap PPI Investments, Inc., LLC (B) 1.28% int. 12/21/00 140,625 316,406 ------------ ------------ 1,180,439 1,452,656 ------------ ------------ P H I HOLDING COMPANY A retailer of mid-priced gift items, home and garden decor, accessories and other similar consumer products. 12.5% Senior Subordinated Note due 2010 $ 1,125,000 10/25/02 990,008 1,125,000 Warrant, exercisable until 2010, to purchase common stock at $.02 per share (B) 186 shs. 10/25/02 157,102 371,840 ------------ ------------ 1,147,110 1,496,840 ------------ ------------ PRECISION DYNAMICS, INC. A manufacturer of custom-designed solenoid valves and controls. Senior Secured Floating Rate Revolving Credit Facility due 2005 $ 366,750 07/22/96 366,750 366,750 Senior Secured Floating Rate Term Note due 2005 $ 142,625 07/22/96 142,625 142,625 12% Senior Secured Term Note due 2005 $ 163,000 07/22/96 161,363 163,000 8% Preferred Stock 228 shs. 07/22/96 116,023 115,944 Common Stock (B) 299 shs. 07/22/96 14,489 14,489 Warrant, exercisable until 2005, to purchase common stock at $.01 per share (B) 162 shs. 07/22/96 49,000 2 ------------ ------------ 850,250 802,810 ------------ ------------ *08/07/98, 02/23/99, 12/22/99 and 02/25/03. **08/07/98 and 02/29/00. -------------------------------------------------------------------------------- 16 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL PARTICIPATION INVESTORS March 31, 2005 (Unaudited) Shares, Units, Warrants, Ownership or Acquisition CORPORATE RESTRICTED SECURITIES (A) (CONTINUED) Principal Amount Date Cost Fair Value ---------------- ----------- ------------ ------------ PROCESS CHEMICALS LLC A specialty chemical company that manufactures processed chemicals for the fertilizer, asphalt and concrete industries. Common Membership Interests 1 uts. * $ 4 $ 144,000 ------------ ------------ 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 -- ------------ ------------ PW EAGLE, INC. - O.T.C. An extruder of small and medium diameter plastic pipe and tubing in the United States. Warrant, exercisable until 2007, to purchase common stock at $.01 per share (B) 101,236 shs. 09/16/99 1 413,144 ------------ ------------ QUALIS AUTOMOTIVE LLC A distributor of aftermarket automotive brake and chassis products. 12% Senior Subordinated Note due 2012 $ 937,500 05/28/04 751,001 966,518 Common Stock (B) 187,500 shs. 05/28/04 187,500 168,750 Warrant, exercisable until 2012, to purchase common stock at $.01 per share (B) 199,969 shs. 05/28/04 199,969 2,000 ------------ ------------ 1,138,470 1,137,268 ------------ ------------ QUALSERV CORPORATION A provider of foodservice equipment and supplies, to major restaurant chains and their franchisees. 14% Senior Subordinated Note due 2012 $ 997,487 07/09/04 972,864 941,817 Limited Partnership Interest (B) 4.90% int. 07/09/04 137,195 123,476 Warrant, exercisable until 2012, to purchase common stock at $.01 per share (B) 280 shs. 07/09/04 25,973 3 ------------ ------------ 1,136,032 1,065,296 ------------ ------------ RIVER RANCH FRESH FOODS LLC A supplier of fresh produce to the retail and foodservice channels. 13% Senior Subordinated Note due 2011 $ 975,000 09/29/04 894,933 961,325 Limited Partnership Interest (B) 21,499 uts. 09/29/04 150,000 134,997 Warrant, exercisable until 2011, to purchase common stock at $.01 per share (B) 12,481 shs. 09/29/04 83,596 125 ------------ ------------ 1,128,529 1,096,447 ------------ ------------ *07/31/97 and 01/04/99. **11/14/01 and 08/12/94. -------------------------------------------------------------------------------- 17 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL PARTICIPATION INVESTORS March 31, 2005 (Unaudited) Shares, Units, Warrants, Ownership or Acquisition CORPORATE RESTRICTED SECURITIES (A) (CONTINUED) Principal Amount Date Cost Fair Value ---------------- ----------- ------------ ------------ 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 $ 503,957 $ 549,575 Warrant, exercisable until 2011, to purchase common stock at $.01 per share (B) 74 shs. 11/14/03 65,089 1 ------------ ------------ 569,046 549,576 ------------ ------------ SAFETY SPEED CUT MANUFACTURING COMPANY, INC. A manufacturer of vertical panel saws and routers for the wood working industry. Senior Secured Floating Rate Tranche A Note due 2007 $ 659,549 06/02/99 659,549 659,549 12% Senior Secured Tranche B Note due 2007 $ 646,089 06/02/99 646,089 646,089 Class B Common Stock (B) 846 shs. 06/02/99 146,456 290,455 ------------ ------------ 1,452,094 1,596,093 ------------ ------------ SAVAGE SPORTS HOLDING, INC. A manufacturer of sporting firearms. 12% Senior Subordinated Note due 2012 $ 814,655 09/10/04 756,628 824,198 Common Stock (B) 310 shs. 09/10/04 310,345 279,315 Warrant, exercisable until 2012, to purchase common stock at $.01 per share (B) 71 shs. 09/10/04 60,129 1 ------------ ------------ 1,127,102 1,103,514 ------------ ------------ SELIG ACQUISITION CORPORATION A manufacturer of container sealing materials for bottles used in consumer products. 12% Senior Subordinated Note due 2009 $ 1,125,000 06/13/02 1,056,193 1,145,250 Warrant, exercisable until 2009, to purchase common stock at $.01 per share (B) 1,064 shs. 06/13/02 96,365 314,025 ------------ ------------ 1,152,558 1,459,275 ------------ ------------ SHELTER ACQUISITION, INC. A distributor of roofing supplies and products throughout the Midwest. 12.5% Senior Subordinated Note due 2008 $ 803,571 08/01/02 727,247 819,642 Common Stock (B) 477,411 shs. * 477,411 429,670 Warrant, exercisable until 2009, to purchase common stock at $.01 per share (B) 139,470 shs. 08/01/02 114,589 1,395 ------------ ------------ 1,319,247 1,250,707 ------------ ------------ SNYDER INDUSTRIES, INC. A manufacturer of proprietary rotationally molded polyethylene containers. 12.25% Senior Subordinated Note due 2008 $ 2,250,000 12/06/99 2,089,029 2,250,000 Warrant, exercisable until 2007, to purchase common stock at $.01 per share (B) 369 shs. 12/06/99 306,818 115,499 ------------ ------------ 2,395,847 2,365,499 ------------ ------------ SPECIALTY FOODS GROUP, INC. A manufacturer and distributor of branded meat products. Limited Partnership Interest of MHD Holdings LLC (B) 0.76% int. 08/29/00 278,907 67,845 ------------ ------------ *08/01/02, 01/17/03 and 12/31/04. -------------------------------------------------------------------------------- 18 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL PARTICIPATION INVESTORS March 31, 2005 (Unaudited) Shares, Units, Warrants, Ownership or Acquisition CORPORATE RESTRICTED SECURITIES (A) (CONTINUED) Principal Amount Date Cost Fair Value ---------------- ----------- ------------ ------------ 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. 12% Senior Subordinated Note due 2007 $ 975,000 08/21/03 943,659 994,500 Limited Partnership Interest (B) 1.05% int. 08/20/03 150,000 666,000 Warrant, exercisable until 2011, to purchase common stock at $.01 per share (B) 45,942 shs. 08/21/03 45,000 203,982 ------------ ------------ 1,138,659 1,864,482 ------------ ------------ 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. Senior Secured Floating Rate Term A Note due 2010 $ 179,688 03/01/05 179,688 179,233 Senior Secured Floating Rate Term B Note due 2012 $ 210,937 03/01/05 210,937 210,244 12% Senior Subordinated Note due 2013 $ 585,937 03/01/05 553,845 577,726 Limited Partnership Interest of Saw Mill Capital Fund V, L.P. (B) 236 uts. 03/01/05 235,547 211,995 Warrant, exercisable until 2015, to purchase common stock at $.01 per share (B) 37 shs. 03/01/05 32,098 -- ------------ ------------ 1,212,115 1,179,198 ------------ ------------ 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 1,250,248 1,356,000 Common Stock (B) 315 shs. 02/04/98 315,000 267,238 Warrant, exercisable until 2006, to purchase common stock at $.01 per share (B) 222 shs. 02/05/98 184,416 188,337 ------------ ------------ 1,749,664 1,811,575 ------------ ------------ TIDEWATER HOLDINGS, INC. An operator of a barge transportation line on the Columbia/Snake River system. 17% Preferred Stock (B) 280 shs. 12/23/02 280,000 378,000 Convertible Preferred Stock, convertible into common stock at $1,000 per share (B) 560 shs. 07/25/96 560,000 756,000 Warrant, exercisable until 2008, to purchase common stock at $.01 per share (B) 237 shs. 07/25/96 24,103 319,788 ------------ ------------ 864,103 1,453,788 ------------ ------------ TOMAH HOLDINGS, INC. A manufacturer of specialty chemicals. 16% Senior Subordinated Note due 2011 $ 773,875 12/08/03 748,387 804,830 16% Preferred Stock Series A (B) 20 shs. 12/08/03 334,393 347,933 Common Stock (B) 2,789 shs. 12/08/03 69,602 62,641 ------------ ------------ 1,152,382 1,215,404 ------------ ------------ -------------------------------------------------------------------------------- 19 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL PARTICIPATION INVESTORS March 31, 2005 (Unaudited) Shares, Units, Warrants, Ownership or Acquisition CORPORATE RESTRICTED SECURITIES (A) (CONTINUED) Principal Amount Date Cost Fair Value ---------------- ----------- ------------ ------------ 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 $ 676,983 01/20/00 $ 676,983 $ 692,182 12% Senior Subordinated Note due 2010 $ 758,100 01/20/00 723,762 785,859 Common Stock (B) 129,960 shs. 01/20/00 129,960 103,968 Warrant, exercisable until 2010, to purchase common stock at $1 per share (B) 148,912 shs. 01/20/00 56,316 1,489 ------------ ------------ 1,587,021 1,583,498 ------------ ------------ TRUSTILE DOORS, INC. A manufacturer and distributor of interior doors. 12.5% Senior Subordinated Note due 2010 $ 562,500 04/11/03 521,493 569,770 Warrant, exercisable until 2010, to purchase common stock at $.01 per share (B) 3,060 shs. 04/11/03 50,625 31 ------------ ------------ 572,118 569,801 ------------ ------------ TUBULAR TEXTILE MACHINERY A designer, manufacturer, seller and servicer of finishing machinery for the knit and woven segments of the global textile industry. 12% Senior Subordinated Note due 2014 $ 705,457 05/28/04 634,560 679,840 8.75% Senior Secured Note due 2011 $ 409,310 05/28/04 409,310 398,730 Common Stock (B) 385,233 shs. 05/28/04 385,233 288,925 Warrant, exercisable until 2012, to purchase common stock at $.01 per share (B) 116,521 shs. 05/28/04 74,736 1,165 ------------ ------------ 1,503,839 1,368,660 ------------ ------------ TVI, INC. A retailer of used clothing in the United States, Canada and Australia. Common Stock (B) 187,500 shs. 05/02/00 187,500 219,375 ------------ ------------ U S M HOLDINGS CORPORATION A provider of facility maintenance services to retail and corporate clients with multiple locations. 12% Senior Subordinated Note due 2011 $ 947,368 08/06/03 808,521 968,259 Preferred Stock (B) 1,771 shs. 08/06/03 177,086 177,097 Common Stock (B) 546 shs. 08/06/03 546 546 Warrant, exercisable until 2011, to purchase common stock at $.01 per share (B) 502 shs. 08/06/03 157,869 502 ------------ ------------ 1,144,022 1,146,404 ------------ ------------ U-LINE CORPORATION A manufacturer of high-end, built-in, undercounter icemaking, wine storage and refrigeration appliances. 12.5% Senior Subordinated Note due 2012 $ 996,500 04/30/04 891,205 1,010,998 10% Junior Subordinated Note due 2012 $ 33,705 04/30/04 33,713 33,758 Common Stock (B) 96 shs. 04/30/04 96,400 86,760 Warrant, exercisable until 2012, to purchase common stock at $.01 per share (B) 122 shs. 04/30/04 112,106 1 ------------ ------------ 1,133,424 1,131,517 ------------ ------------ -------------------------------------------------------------------------------- 20 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL PARTICIPATION INVESTORS March 31, 2005 (Unaudited) Shares, Units, Warrants, Ownership or Acquisition CORPORATE RESTRICTED SECURITIES (A) (CONTINUED) Principal Amount Date Cost Fair Value ---------------- ----------- ------------ ------------ VICTORY VENTURES LLC An acquirer of controlling or substantial interests in other entities. Series A Preferred Units (B) 0.03% int. 12/02/96 $ 1 $ 2 ------------ ------------ VITALITY FOODSERVICE, INC. A non-carbonated beverage dispensing company focused on the foodservice industry. 13% Senior Subordinated Note due 2011 $ 999,153 09/24/04 904,572 1,021,449 Common Stock (B) 12,585 shs. 09/24/04 125,850 113,265 Warrant, exercisable until 2011, to purchase common stock at $.01 per share (B) 12,593 shs. 09/24/04 98,938 126 ------------ ------------ 1,129,360 1,134,840 ------------ ------------ VITEX PACKAGING GROUP, INC. A manufacturer of specialty packaging, primarily envelopes and tags used on tea bags and medical and food products. 12.5% Senior Subordinated Note due 2012 $ 900,000 07/19/04 785,152 901,791 Limited Partnership Interest Class A (B) 219,375 uts. 07/19/04 219,375 197,438 Limited Partnership Interest Class B (B) 96,848 uts. 07/19/04 96,848 87,163 ------------ ------------ 1,101,375 1,186,392 ------------ ------------ WALLS INDUSTRIES, INC. A provider of branded workwear and sporting goods apparel. 10% Senior Subordinated Lien Note due 2009 $ 532,895 07/12/04 532,895 525,553 14% Senior Subordinated Note due 2012 $ 552,631 07/12/04 551,131 544,622 Limited Partnership Interest (B) 0.20% int. 07/12/04 19,737 17,763 Warrant, exercisable until 2014, to purchase common stock at $.01 per share (B) 2,133 shs. 07/12/04 1,500 21 ------------ ------------ 1,105,263 1,087,959 ------------ ------------ WASHINGTON INVENTORY SERVICES, INC. A provider of physical inventory taking and other related services to retailers. 12.5% Senior Subordinated Note due 2011 $ 569,524 11/03/00 556,510 575,219 Senior Preferred Stock (B) 2,484 shs. 11/01/00 118,605 116,062 Class B Common Stock (B) 4,743 shs. 11/01/00 4,743 43,669 Warrant, exercisable until 2011, to purchase common stock at $.01 per share (B) 2,107 shs. 11/03/00 -- 19,380 ------------ ------------ 679,858 754,330 ------------ ------------ WEASLER HOLDINGS LLC A manufacturer of mechanical power transmission components for the agricultural, lawn and turf industries. Limited Partnership Interest (B) 0.82% int. 02/03/03 53,570 74,998 Warrant, exercisable until 2010, to purchase common stock at $.01 per share (B) 136 shs. 02/04/03 111,086 189,938 ------------ ------------ 164,656 264,936 ------------ ------------ TOTAL PRIVATE PLACEMENT INVESTMENTS $ 84,927,598 $ 85,334,802 ------------ ------------ -------------------------------------------------------------------------------- 21 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL PARTICIPATION INVESTORS March 31, 2005 (Unaudited) Shares or Interest Due Principal CORPORATE RESTRICTED SECURITIES (A) (CONTINUED) Rate Date Amount Cost Fair Value ---- ---- ------ ---- ------------ RULE 144A SECURITIES - 7.03%: BONDS - 6.65% A E P Industries, Inc. 7.875% 03/15/13 $ 75,000 $ 75,000 $ 75,319 A E S Corporation 8.750 05/15/13 425,000 477,223 463,250 A E S Corporation 9.000 05/15/15 175,000 175,000 192,500 Activant Solutions, Inc. 9.010 04/01/10 400,000 400,000 408,000 BCP Caylux Holding Lux SCA 9.625 06/15/14 355,000 355,000 404,700 Blockbuster, Inc. 9.000 09/01/12 275,000 277,148 266,750 Bombardier Capital, Inc. 6.125 06/29/06 500,000 509,383 498,750 Bombardier, Inc. 6.300 05/01/14 500,000 440,315 420,000 Cablevision Systems Corporation 6.669 04/01/09 450,000 450,000 477,000 Charter Communications Op LLC 8.000 04/30/12 500,000 498,750 497,500 Douglas Dynamics LLC 7.750 01/15/12 325,000 327,023 318,500 GulfMark Offshore, Inc. 7.750 07/15/14 300,000 298,725 309,000 Intelsat Bermuda, Ltd. 7.805 01/15/12 225,000 225,000 228,375 Intelsat Bermuda, Ltd. 8.250 01/15/13 250,000 250,000 252,500 Interactive Health LLC 7.250 04/01/11 500,000 412,040 455,000 Jostens I H Corporation 7.625 10/01/12 325,000 325,000 321,750 Magnachip Semiconductor 8.000 12/15/14 50,000 50,000 51,125 Markwest Energy 6.875 11/01/14 250,000 250,000 250,000 Metaldyne Corporation 10.000 11/01/13 340,000 342,130 309,400 PQ Corporation 7.500 02/15/13 175,000 175,000 172,375 Siebe PLC 6.500 01/15/10 350,000 308,000 320,250 T C W Lev Income Trust LP 8.410 09/30/04 942,858 942,858 141,429 Texas Genco LLC 6.875 12/15/14 350,000 350,000 350,875 Universal City Florida 7.493 05/01/10 100,000 100,000 103,500 Universal City Florida 8.375 05/01/10 100,000 100,000 102,000 ------------ ------------ ------------ TOTAL BONDS $ 8,237,858 8,113,595 7,389,848 ============ ------------ ------------ CONVERTIBLE BONDS - 0.38% Cymer, Inc. 3.500% 02/15/09 $ 450,000 $ 450,000 $ 424,125 ------------ ------------ ------------ TOTAL CONVERTIBLE BONDS $ 450,000 450,000 424,125 ============ ------------ ------------ WARRANTS - 0.00% Winsloew Furniture, Inc. (B) 700 $ 7 $ 11 ------------ ------------ TOTAL WARRANTS 7 11 ------------ ------------ TOTAL RULE 144A SECURITIES 8,563,602 7,813,984 ------------ ------------ TOTAL CORPORATE RESTRICTED SECURITIES $ 93,491,200 $ 93,148,786 ------------ ------------ -------------------------------------------------------------------------------- 22 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL PARTICIPATION INVESTORS March 31, 2005 (Unaudited) Interest Due Principal CORPORATE PUBLIC SECURITIES - 25.10%:(A) Rate Date Amount Cost Market Value -------- -------- --------- -------- ------------ BONDS - 22.24% Abitibi-Consolidated, Inc. 7.750% 06/15/11 $ 500,000 $ 517,769 $ 490,000 Activant Solutions, Inc. 10.500 06/15/11 325,000 326,024 346,125 Aearo Co. 8.250 04/15/12 225,000 225,000 237,375 Allied Waste NA 7.875 04/15/13 500,000 513,750 498,750 American Media Operation, Inc. 8.875 01/15/11 475,000 475,697 489,250 Appleton Papers, Inc. 8.125 06/15/11 250,000 250,000 258,125 Argo Tech Corporation 9.250 06/01/11 425,000 425,000 456,875 Arrow Electronics, Inc. 7.000 01/15/07 500,000 523,176 518,707 C S C Holdings, Inc. 7.625 04/01/11 250,000 251,053 260,000 Cadmus Communications Corporation 8.375 06/15/14 350,000 350,000 365,750 Chemed Corporation 8.750 02/24/11 600,000 600,000 652,500 Chesapeake Energy Corporation 7.000 08/15/14 150,000 150,000 154,500 Cincinnati Bell, Inc. 8.375 01/15/14 550,000 503,750 541,750 Collins & Aikman Products Co. 10.750 12/31/11 450,000 462,125 370,125 Del Monte Corporation 8.625 12/15/12 200,000 200,000 216,500 Dollar Financial Group 9.750 11/15/11 325,000 325,000 346,125 Dominos, Inc. 8.250 07/01/11 109,000 108,213 113,905 Electronic Data Systems Corporation 7.125 10/15/09 500,000 506,002 537,419 Esterline Technologies 7.750 06/15/13 175,000 175,000 182,000 Ford Motor Credit Co. 5.800 01/12/09 500,000 499,070 477,538 G F S I, Inc. 9.625 03/01/07 375,000 337,546 360,000 Gencorp, Inc. 9.500 08/15/13 130,000 130,000 144,950 General Motors Accept Corporation 5.850 01/14/09 500,000 503,532 462,659 General Nutrition Center 8.500 12/01/10 425,000 425,000 361,250 Goodyear Tire & Rubber Co. 7.857 08/15/11 350,000 327,250 337,750 Houghton Mifflin Co. 9.875 02/01/13 500,000 528,074 515,000 Huntsman LLC 11.625 10/15/10 163,000 161,068 190,710 Intrawest Corporation 7.500 10/15/13 250,000 250,000 250,625 K 2, Inc. 7.375 07/01/14 150,000 150,610 155,250 Koppers Inc. 9.875 10/15/13 250,000 250,000 278,750 Leucadia National Corporation 7.000 08/15/13 350,000 357,120 349,125 Liberty Media Corporation 5.700 05/15/13 500,000 475,805 471,265 Lodgenet Entertainment Corporation 9.500 06/15/13 375,000 375,000 408,750 Lyondell Chemical Co. 9.500 12/15/08 450,000 459,535 481,500 M G M Mirage, Inc. 6.000 10/01/09 225,000 228,080 221,906 M S X International, Inc. 11.000 10/15/07 175,000 173,502 175,000 Majestic Star Casino LLC 9.500 10/15/10 250,000 250,000 261,563 Manitowoc Company, Inc. 7.125 11/01/13 100,000 100,000 103,000 Mediacom LLC 9.500 01/15/13 750,000 746,101 748,125 Moog, Inc. 6.250 01/15/15 60,000 60,000 58,800 Nalco Co. 7.750 11/15/11 250,000 250,000 260,000 Neff Corporation 10.250 06/01/08 90,000 89,000 79,200 Nextel Communications Corporation 7.375 08/01/15 400,000 410,343 422,500 North American Energy Partners 8.750 12/01/11 200,000 200,000 180,000 Northwest Airlines Corporation 8.970 01/02/15 643,112 643,112 407,026 Numatics, Inc. 9.625 04/01/08 375,000 376,823 341,250 O E D Corp/Diamond Jo Company Guarantee 8.750 04/15/12 500,000 492,980 471,250 -------------------------------------------------------------------------------- 23 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL PARTICIPATION INVESTORS March 31, 2005 (Unaudited) Interest Due Principal CORPORATE PUBLIC SECURITIES - (A) Rate Date Amount Cost Market Value (Continued) -------- -------- --------- -------- ------------ Offshore Logistics, Inc. 6.125% 06/15/13 $ 350,000 $ 350,000 $ 332,500 Pacific Energy Partners 7.125 06/15/14 250,000 252,171 258,750 Pinnacle Foods Group 8.250 12/01/13 225,000 225,000 192,375 Pliant Corporation 0.000 06/15/09 675,000 587,341 607,500 Primedia, Inc. 8.000 05/15/13 500,000 513,750 510,000 Quintiles Transnational Corporation 10.000 10/01/13 250,000 250,000 281,250 Rayovac Corporation 8.500 10/01/13 175,000 175,000 180,250 Rent-A-Center, Inc. 7.500 05/01/10 250,000 250,000 248,750 Rent-Way, Inc. 11.875 06/15/10 450,000 471,532 498,375 Rhodia SA 10.250 06/01/10 250,000 252,660 272,500 Rhodia SA 8.875 06/01/11 250,000 249,834 243,125 Rogers Wireless, Inc. 7.250 12/15/12 90,000 90,000 91,800 Rogers Wireless, Inc. 8.000 12/15/12 90,000 90,000 92,475 Rogers Wireless, Inc. 7.500 03/15/15 60,000 60,000 61,950 Service Corporation International 6.000 12/15/05 21,000 21,071 21,000 Sheridan Acquisition Corporation 10.250 08/15/11 225,000 222,001 239,063 Sports Club Co. 11.375 03/15/06 100,000 97,000 98,500 Tekni-Plex, Inc. 12.750 06/15/10 500,000 483,500 417,500 Telex Communications, Inc. 11.500 10/15/08 250,000 250,000 273,750 Tenet Healthcare Corporation 6.375 12/01/11 250,000 241,250 230,625 Tenet Healthcare Corporation 9.875 07/01/14 350,000 341,859 364,000 Triton P C S, Inc. 8.500 06/01/13 500,000 500,000 460,000 Tyco International Group SA 6.375 10/15/11 150,000 148,500 160,132 United Rentals, Inc. 7.750 11/15/13 325,000 325,000 315,250 Utilicorp United, Inc. 9.950 02/01/11 500,000 551,880 560,000 Vicorp Restaurants Inc 10.500 04/15/11 300,000 296,373 306,000 Vought Aircraft Industries 8.000 07/15/11 650,000 649,326 640,250 Warner Music Group 7.375 04/15/14 125,000 125,000 128,750 Williams Scotsman, Inc. 9.875 06/01/07 250,000 246,250 248,750 Wornick Co. 10.875 07/15/11 350,000 350,000 365,750 ------------ ------------ ------------ TOTAL BONDS $ 24,856,112 24,803,408 24,711,443 ============ ------------ ------------ -------------------------------------------------------------------------------- 24 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL PARTICIPATION INVESTORS March 31, 2005 (Unaudited) Shares or Interest Due Principal CORPORATE PUBLIC SECURITIES (A)(CONTINUED) Rate Date Amount Cost Market Value -------- -------- --------- -------- ------------ COMMON STOCK - 2.41% Distributed Energy Systems 14,000 $ 177,078 $ 47,600 Dolby Laboratories, Inc. (B) 100 1,800 2,350 H C I Direct, Inc. (B) 500 -- -- Rent-Way, Inc. (B) 46,432 458,123 380,742 Transmontaigne, Inc. (B) 277,771 909,179 2,222,168 Shamir Optical Industry Ltd (B) 1,700 23,800 26,265 ------------ ------------ TOTAL COMMON STOCK 1,569,980 2,679,125 ------------ ------------ CONVERTIBLE BONDS - 0.45% Leucadia National Corporation 3.750% 04/15/14 $ 500,000 $ 500,000 $ 493,750 ------------ ------------ ------------ TOTAL CONVERTIBLE BONDS $ 500,000 500,000 493,750 ============ ------------ ------------ TOTAL CORPORATE PUBLIC SECURITIES $ 26,873,388 $ 27,884,318 ------------ ------------ Shares or Interest Due Principal SHORT-TERM SECURITIES: Rate/Yield Date Amount Cost Market Value ---------- -------- --------- -------- ------------ COMMERCIAL PAPER - 8.15% Alcoa, Inc. 2.801% 04/06/05 $ 1,131,000 $ 1,130,560 $ 1,130,560 Campbell Soup Company 2.781 04/07/05 1,887,000 1,886,126 1,886,126 Countrywide Home Loans, Inc. 2.852 04/05/05 2,090,000 2,089,338 2,089,338 Detroit Edison Company 2.802 04/04/05 2,225,000 2,224,481 2,224,481 Whirlpool Corporation 2.772 04/01/05 1,723,000 1,723,000 1,723,000 ------------ ------------ ------------ TOTAL SHORT-TERM SECURITIES $ 9,056,000 $ 9,053,505 $ 9,053,505 ============ ------------ ------------ TOTAL INVESTMENTS 117.08% $129,418,093 $130,086,609 ============ ------------ Other Assets 4.04 4,494,453 Liabilities (21.12) (23,470,469) ------ ------------ TOTAL NET ASSETS 100.00% $111,110,593 ====== ============ (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. -------------------------------------------------------------------------------- 25 CONSOLIDATED SCHEDULE OF INVESTMENTS (CONT.) MASSMUTUAL PARTICIPATION INVESTORS March 31, 2005 (Unaudited) Fair Value/ Fair Value/ INDUSTRY CLASSIFICATION: (Cont.) Market Value INDUSTRY CLASSIFICATION: (Cont.) Market Value -------------- -------------- AEROSPACE - 1.52% BUILDINGS & REAL ESTATE - 5.45% Argo Tech Corporation $ 456,875 A W C Holding Company $ 1,143,161 Bombardier, Inc. 420,000 Adorn, Inc. 1,286,625 Esterline Technologies 182,000 Eagle Window & Door Holding Co. 1,807,415 Vought Aircraft Industries 640,250 Shelter Acquisition, Inc. 1,250,707 -------------- TruStile Doors, Inc. 569,801 1,699,125 -------------- -------------- 6,057,709 AIRLINES - 0.37% -------------- Northwest Airlines Corporation 407,026 CARGO TRANSPORT - 2.48% -------------- Kenan-Advantage Transport Company 1,307,414 AUTOMOBILE - 8.60% Tidewater Holdings, Inc. 1,453,788 America's Body Company, Inc./LCP Holding Co. 1,750,000 -------------- Collins & Aikman Products Co. 370,125 2,761,202 Gencorp, Inc. 144,950 -------------- Goodyear Tire & Rubber Co. 337,750 CHEMICAL, PLASTICS Jason, Inc. 1,031,221 & RUBBER - 2.70% LIH Investors, L.P. 2,681,166 Capital Specialty Plastics, Inc. 252 Metaldyne Corporation 309,400 Huntsman LLC 190,710 Nyloncraft, Inc. 1,790,518 Koppers, Inc. 278,750 Qualis Automotive LLC 1,137,268 Lyondell Chemical Co. 481,500 -------------- PQ Corporation 172,375 9,552,398 Process Chemicals LLC 144,000 -------------- Rhodia SA 515,625 BEVERAGE, DRUG & FOOD - 4.93% Tomah Holdings, Inc. 1,215,404 Beta Brands Ltd -- -------------- Cains Foods, L.P. 250,288 2,998,616 Del Monte Corporation 216,500 -------------- Dominos, Inc. 113,905 CONSUMER PRODUCTS - 8.36% Eagle Pack Pet Foods, Inc. 561,294 Appleton Papers, Inc. 258,125 Nonni's Food Company 1,168,600 Augusta Sportswear Holding Co. 1,130,433 Pinnacle Foods Group 192,375 Colibri Holdings Corporation 1,013,384 River Ranch Fresh Foods LLC 1,096,447 Euro-Pro Corporation 891,664 Specialty Foods Group, Inc. 67,845 G F S I, Inc. 360,000 Vicorp Restaurants, Inc. 306,000 H C I Direct, Inc. -- Vitality Foodservice, Inc. 1,134,840 K 2, Inc. 155,250 Wornick Co. 365,750 Maverick Acquisition Company 668,968 -------------- Neff Motivation, Inc. 79,200 5,473,844 Rayovac Corporation 180,250 -------------- Royal Baths Manufacturing Company 549,576 BROADCASTING - 2.58% Savage Sports Holding, Inc. 1,103,514 C S C Holdings, Inc. 260,000 The Tranzonic Companies 1,811,575 Cablevision Systems Corporation 477,000 Walls Industries, Inc. 1,087,959 Charter Communications Op LLC 497,500 Winsloew Furniture, Inc. 11 Liberty Media Corporation 471,265 -------------- Lodgenet Entertainment Corporation 408,750 9,289,909 Mediacom LLC 748,125 -------------- -------------- CONTAINERS, PACKAGING 2,862,640 & GLASS - 6.81% -------------- A E P Industries, Inc. 75,319 Paradigm Packaging, Inc. 1,452,656 Pliant Corporation 607,500 Selig Acquisition Corporation 1,459,275 Snyder Industries, Inc. 2,365,499 Tekni-Plex, Inc. 417,500 Vitex Packaging, Inc. 1,186,392 -------------- 7,564,141 -------------- -------------------------------------------------------------------------------- 26 CONSOLIDATED SCHEDULE OF INVESTMENTS (CONT.) MASSMUTUAL PARTICIPATION INVESTORS March 31, 2005 (Unaudited) Fair Value/ Fair Value/ INDUSTRY CLASSIFICATION: (Cont.) Market Value INDUSTRY CLASSIFICATION: (Cont.) Market Value -------------- -------------- DISTRIBUTION - 4.64% FINANCIAL SERVICES - 3.09% Brampton Fastener Co. Ltd $ 898,850 BCP Caylux Holding Lux SCA $ 404,700 Corvest Group, Inc. 1,965,370 Bombardier Capital, Inc. 498,750 Kele and Associates, Inc. 1,229,813 Dollar Financial Group 346,125 QualServ Corporation 1,065,296 East River Ventures I, L.P. 6,821 Strategic Equipment & Supply Corporation, Inc. -- Ford Motor Credit Co. 477,538 -------------- General Motors Acceptance Corporation 462,659 5,159,329 Highgate Capital LLC 681 -------------- Leucadia National Corporation 842,875 DIVERSIFIED/CONGLOMERATE, T C W Leveraged Income Trust, L.P. 141,429 MANUFACTURING - 3.44% Victory Ventures LLC 2 Activant Solutions, Inc. 754,125 Williams Scotsman, Inc. 248,750 Coining of America LLC 1,101,237 -------------- Dexter Magnetics Technologies, Inc. 580,514 3,430,330 Douglas Dynamics LLC 318,500 -------------- Evans Consoles, Inc. 68,418 HEALTHCARE, EDUCATION & Justrite Manufacturing Acquisition Co. 837,513 CHILDCARE - 4.60% Tyco International Group SA 160,132 A T I Acquisition Company 1,066,361 -------------- American Hospice Management Holding LLC 1,405,879 3,820,439 Interactive Health LLC 455,000 -------------- MedAssist, Inc. 1,282,035 DIVERSIFIED/CONGLOMERATE, Quintiles Transnational Corporation 281,250 SERVICE - 8.18% Shamir Optical Industry Ltd 26,265 Abitibi-Consolidated, Inc. 490,000 Tenet Healthcare Corporation 594,625 Allied Waste NA 498,750 -------------- CapeSuccess LLC 2,512 5,111,415 Chemed Corporation 1,455,540 -------------- Diversco, Inc./DHI Holdings, Inc. 1,044,048 HOME & OFFICE FURNISHINGS, Dwyer Group, Inc. 1,339,471 HOUSEWARES, AND DURABLE Keystone North America, Inc. 173,177 CONSUMER PRODUCTS - 3.63% Lancaster Laboratories, Inc. 810,076 Connor Sport Court International, Inc. 1,133,204 Moss, Inc. 969,788 Home Decor Holding Company 1,128,514 M S X International, Inc. 175,000 Hussey Seating Corporation 642,415 Service Corporation International 21,000 U-Line Corporation 1,131,517 U S M Holdings Corporation 1,146,404 -------------- Universal City Florida 205,500 4,035,650 Washington Inventory Services, Inc. 754,330 -------------- -------------- LEISURE, AMUSEMENT, 9,085,596 ENTERTAINMENT - 1.99% -------------- Intrawest Corporation 250,625 ELECTRONICS - 3.93% Keepsake Quilting, Inc. 881,281 A E S Corporation 655,750 M G M Mirage, Inc. 221,906 Arrow Electronics, Inc. 518,707 Majestic Star Casino LLC 261,563 Directed Electronics, Inc. 1,134,748 O E D Corp/Diamond Jo Company Guarantee 471,250 Distributed Energy Systems 47,600 Warner Music Group 128,750 Electronic Data Systems Corporation 537,419 -------------- Precision Dynamics, Inc. 802,810 2,215,375 Siebe PLC 320,250 -------------- Texas Genco LLC 350,875 -------------- 4,368,159 -------------- FARMING & AGRICULTURE - 0.00% Protein Genetics, Inc. -- -------------- -------------------------------------------------------------------------------- 27 CONSOLIDATED SCHEDULE OF INVESTMENTS (CONT.) MASSMUTUAL PARTICIPATION INVESTORS March 31, 2005 (Unaudited) Fair Value/ Fair Value/ INDUSTRY CLASSIFICATION: (Cont.) Market Value INDUSTRY CLASSIFICATION: (Cont.) Market Value -------------- -------------- MACHINERY - 11.96% RETAIL STORES - 5.82% Aearo Co. $ 237,375 Blockbuster, Inc. $ 266,750 C & M Conveyor, Inc. 1,208,603 General Nutrition Center 361,250 Integration Technology Systems, Inc. 907,967 Neff Corporation 628,265 Manitowoc Company, Inc. 103,000 Olympic Sales, Inc. 1,948,336 Maxon Corporation 1,473,276 P H I Holding Company 1,496,840 NPC, Inc. 1,929,694 Rent-A-Center, Inc. 248,750 Numatics, Inc. 341,250 Rent-Way, Inc. 879,117 PW Eagle, Inc. 413,144 Sports Club Co. 98,500 Safety Speed Cut Manufacturing Company, Inc. 1,596,093 TVI, Inc. 219,375 Synventive Equity LLC 1,864,482 United Rentals, Inc. 315,250 Tronair, Inc. 1,583,498 -------------- Tubular Textile Machinery 1,368,660 6,462,433 Weasler Holdings LLC 264,936 -------------- -------------- TECHNOLOGY - 0.63% 13,291,978 Convera Corporation -------------- Cymer, Inc. 424,125 MEDICAL DEVICES/BIOTECH - 2.74% Delstar Holding Corporation 220,944 Beacon Medical Products, Inc. 1,179,253 Dolby Laboratories, Inc. 2,350 Coeur, Inc. 674,085 Magnachip Semiconductor 51,125 E X C Acquisition Corporation 1,187,761 -------------- -------------- 698,544 3,041,099 -------------- -------------- TELECOMMUNICATIONS - 2.18% MINING, STEEL, IRON Cincinnati Bell, Inc. 541,750 & NON PRECIOUS METALS - 0.05% Intelsat Bermuda, Ltd. 480,875 Better Minerals & Aggregates 54,525 Nextel Communications Corporation 422,500 -------------- Rogers Wireless, Inc. 246,225 OIL AND GAS - 3.52% Telex Communications, Inc. 273,750 Chesapeake Energy Corporation 154,500 Triton P C S, Inc. 460,000 GulfMark Offshore, Inc. 309,000 -------------- Mustang Ventures Company 451,727 2,425,100 North American Energy Partners 180,000 -------------- Offshore Logistics, Inc. 332,500 UTILITIES - 1.01% Pacific Energy Partners 258,750 Bill Barrett Corporation Transmontaigne, Inc. 2,222,168 Markwest Energy 250,000 -------------- Moog, Inc. 58,800 3,908,645 Nalco Co. 260,000 -------------- Utilicorp United, Inc. 560,000 PHARMACEUTICALS - 0.46% -------------- Enzymatic Therapy, Inc. 509,066 1,128,800 -------------- -------------- PUBLISHING/PRINTING - 2.20% WASTE MANAGEMENT/ American Media Operation, Inc. 489,250 POLLUTION - 1.06% Cadmus Communications Corporation 365,750 Terra Renewal Services, Inc. 1,179,198 Houghton Mifflin Co. 515,000 -------------- Jostens I H Corporation 321,750 TOTAL CORPORATE RESTRICTED Primedia, Inc. 510,000 AND PUBLIC SECURITIES - 108.93% $ 121,033,104 Sheridan Acquisition Corporation 239,063 ============== -------------- 2,440,813 -------------- INCOME TAX INFORMATION: The aggregate cost of investments was substantially the same for financial reporting and federal income tax purposes as of March 31, 2005. The net unrealized appreciation of investments for federal tax purposes as of March 31, 2005 is $427,130 and consists of $13,124,800 appreciation and $12,697,670 depreciation. -------------------------------------------------------------------------------- 28 ITEM 2. CONTROLS AND PROCEDURES. (a) The principal executive officer and principal financial officer of the registrant evaluated the effectiveness of the registrant's disclosure controls and procedures (as defined in Rule 30a-3(c) under the Investment Company Act of 1940 (the "Act")) as of a date within 90 days of the filing date of this report and based on this evaluation have concluded that such disclosure controls and procedures are effective to provide reasonable assurance that information required to be disclosed by the registrant on Form N-Q is recorded, processed, summarized and reported within the time periods specified in the Securities and Exchange Commission's rules and forms. (b) There has been no change in the registrant's internal control over financial reporting (as defined in Rule 30a-3(d) under the Act) that occurred during the registrant's last fiscal quarter that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting. ITEM 3. EXHIBITS. Certifications pursuant to Rule 30a-2(a) under the Investment Company Act of 1940 (17CFR 270.30a-2(a)) are attached hereto as an exhibit. SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. (Registrant) MassMutual Participation Investors ---------------------------------- By (Signature and Title)* /s/ Roger W. Crandall --------------------------------------------- Roger W. Crandall, President Date May 25, 2005 ------------------------------------------------------------------ Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated. By (Signature and Title)* /s/ Roger W. Crandall --------------------------------------------- Roger W. Crandall, President Date May 25, 2005 ------------------------------------------------------------------ By (Signature and Title)* /s/ Charles C. McCobb, Jr. --------------------------------------------- Charles C. McCobb, Jr., Vice President and Chief Financial Officer Date May 25, 2005 ------------------------------------------------------------------ * PRINT THE NAME AND TITLE OF EACH SIGNING OFFICER UNDER HIS OR HER SIGNATURE.