================================================================================ 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 811-02183 MassMutual Corporate 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 CORPORATE INVESTORS March 31, 2005 (Unaudited) Shares, Units, Warrants, Ownership or Acquisition CORPORATE RESTRICTED SECURITIES - 77.17%:(A) Principal Amount Date Cost Fair Value ------------ ------------ ------------ ------------ PRIVATE PLACEMENT INVESTMENTS - 70.36% A T I ACQUISITION COMPANY A for-profit post-secondary school serving students in Texas, Florida and Arizona. 12% Senior Subordinated Note due 2012 $ 2,125,000 04/08/04 $ 2,125,000 $ 2,014,214 Warrant, exercisable until 2012, to purchase common stock at $.01 per share (B) 2,323 shs. 04/08/04 -- 23 ____________ ____________ 2,125,000 2,014,237 ____________ ____________ 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 $ 2,125,000 05/18/04 1,925,695 1,968,046 Limited Partnership Interest of AWC Investments, LLC (B) 250 uts. 05/18/04 212,500 191,251 ____________ ____________ 2,138,195 2,159,297 ____________ ____________ ADORN, INC A manufacturer of wall panels, cabinets, moldings and countertops for houses and recreational vehicles. 12.5% Subordinated Note due 2010 $ 2,125,000 02/29/00 1,941,105 2,125,000 Warrant, exercisable until 2010, to purchase common stock at $.02 per share (B) 364 shs. 02/29/00 307,759 305,290 ____________ ____________ 2,248,864 2,430,290 ____________ ____________ AMERICA'S BODY COMPANY, INC./LCP HOLDING CO A designer and manufacturer of commercial work vehicles. 12% Preferred Stock Series C (B) 395 shs. 12/16/03 1,750,000 3,500,001 Warrant, exercisable until 2007, to purchase common stock at $.01 per share (B) 80 shs. * 513,334 1 ____________ ____________ 2,263,334 3,500,002 ____________ ____________ AMERICAN HOSPICE MANAGEMENT HOLDING LLC A for-profit hospice care provider in the United States. 12% Senior Subordinated Note due 2010 $ 2,125,000 01/22/04 1,898,532 2,188,750 Preferred Class A Unit (B) 2,525 uts. 01/22/04 252,500 227,250 Common Class B Unit (B) 3,042 uts. 01/22/04 -- 239,422 ____________ ____________ 2,151,032 2,655,422 ____________ ____________ AUGUSTA SPORTSWEAR HOLDING CO A manufacturer and distributor of athletic apparel, activewear and team uniforms. 12% Senior Subordinated Note due 2012 $ 1,686,800 12/31/04 1,569,496 1,691,582 Common Stock (B) 493 shs. ** 492,975 443,682 Warrant, exercisable until 2012, to purchase common stock at $.01 per share (B) 137 shs. 12/31/04 119,482 1 ____________ ____________ 2,181,953 2,135,265 ____________ ____________ *11/2/98 and 12/16/03. **12/31/04 and 03/31/05. -------------------------------------------------------------------------------- 7 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL CORPORATE 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 $ 230,636 04/09/02 $ 230,636 $ 230,347 Senior Secured Tranche A Floating Rate Note due 2008 $ 815,923 04/09/02 815,923 807,854 12% Senior Secured Note due 2010 $ 721,196 04/09/02 624,132 755,420 Limited Partnership Interest of Riverside Capital Appreciation Fund IV, L.P. (B) 11.16% int. 04/09/02 152,329 141,209 Warrant, exercisable until 2010, to purchase common stock at $.01 per share (B) 1,390 shs. 04/09/02 127,497 128,861 ____________ ____________ 1,950,517 2,063,691 ____________ ____________ BETA BRANDS LTD A manufacturer of hard candy and chocolate-coated products sold primarily to the Canadian market. 5% Promissory Note due 2009 (B) $ 195,498 03/31/04 195,498 -- Warrant, exercisable until 2009, to purchase common stock at $.01 per share (B) 4,895 shs. 03/31/04 1 -- ____________ ____________ 195,499 -- ____________ ____________ BETTER MINERALS & AGGREGATES A producer of high grade industrial and specialty silica sands. 14% Redeemable Preferred Stock (B) 997 shs. 09/30/99 545,858 108,991 Convertible Preferred Stock Series A and B, convertible into common stock at $9.26 per share (B) 126,003 shs. 12/19/96 1,166,700 -- Common Stock (B) 20,027 shs. 09/30/99 799,068 -- Warrants, exercisable until 2005 and 2010, to purchase common stock at $.01 per share (B) 11,399 shs. * 128,502 -- ____________ ____________ 2,640,128 108,991 ____________ ____________ 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 $ 787,500 12/31/04 787,500 642,600 12% Senior Secured Term B Note due 2009 $ 806,250 12/31/04 806,250 823,181 Limited Partnership Interest of Brafasco Investors LLC (B) 82,500 uts. 12/31/04 82,500 74,250 Preferred Stock (B) 290 shs. 12/31/04 -- 145,000 Warrant of GC-Sun Holdings L.P., exercisable until 2008, to purchase common stock at $.01 per share (B) 880 shs. 03/02/00 347,288 -- ____________ ____________ 2,023,538 1,685,031 ____________ ____________ 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 $ 996,235 09/13/02 996,235 1,005,741 11% Senior Subordinated Note due 2010 $ 838,102 09/13/02 798,457 854,930 Common Stock (B) 316,265 shs. 09/13/02 316,265 253,012 Warrant, exercisable until 2010, to purchase common stock at $.01 per share (B) 137,175 shs. 09/13/02 60,250 1,372 ____________ ____________ 2,171,207 2,115,055 ____________ ____________ *12/19/96 and 09/30/99. -------------------------------------------------------------------------------- 8 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL CORPORATE 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) 117 uts. 09/29/95 $ 158,369 $ 500,619 ____________ ____________ CAPESUCCESS LLC A provider of diversified staffing services. Preferred Membership Interests (B) 1,882 uts. 04/29/00 8,396 420 Common Membership Interests (B) 24,318 uts. 04/29/00 108,983 5,442 ____________ ____________ 117,379 5,862 ____________ ____________ CAPITAL SPECIALTY PLASTICS, INC A producer of desiccant strips used for packaging pharmaceuticals products. Common Stock (B) 109 shs. * 503 503 ____________ ____________ 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 20,000 shs. 02/24/04 1,000,000 1,529,600 ____________ ____________ COEUR, INC A producer of proprietary, disposable power injection syringes. Senior Secured Floating Rate Revolving Credit. Facility due 2010 $ 44,384 02/02/05 44,384 43,720 8.75% Senior Secured Term Note due 2010 $ 570,652 04/30/03 570,652 584,991 11.5% Senior Subordinated Note due 2011 $ 424,819 04/30/03 390,257 435,930 Common Stock (B) 126,812 shs. 04/30/03 126,812 114,131 Warrant, exercisable until 2010, to purchase common stock at $.01 per share (B) 87,672 shs. 04/30/03 40,804 877 ____________ ____________ 1,172,909 1,179,649 ____________ ____________ COINING CORPORATION OF AMERICA LLC A manufacturer of close tolerance parts and metal stampings. Senior Secured Floating Rate Revolving Credit. Facility due 2006 $ 129,630 01/07/02 140,432 137,136 Senior Secured Floating Rate Tranche A Note due 2007 $ 993,827 06/26/01 966,821 899,488 13% Senior Secured Tranche B Note due 2006 $ 648,148 06/26/01 648,148 630,210 Limited Partnership Interest (B) 6.38% int. 06/26/01 324,074 259,259 Warrant, exercisable until 2008, to purchase common stock at $.01 per share (B) 107,036 shs. 06/26/01 79,398 1,070 ____________ ____________ 2,158,873 1,927,163 ____________ ____________ *12/30/97 and 05/29/99. -------------------------------------------------------------------------------- 9 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL CORPORATE 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 $ 1,593,750 09/22/00 $ 1,437,073 $ 1,513,516 28% Preferred Stock (B) 71 shs. 11/02/01 70,833 76,168 20% Preferred Stock (B) 66 shs. 03/09/04 66,406 58,855 Common Stock (B) 1,429 shs. 09/22/00 531,250 265,624 Warrant, exercisable until 2008, to purchase common stock at $.01 per share (B) 843 shs. 09/22/00 265,625 8 ____________ ____________ 2,371,187 1,914,171 ____________ ____________ 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 $ 2,001,121 * 1,843,159 1,965,165 Limited Partnership Interest (B) 189,585 uts. ** 189,586 170,627 Warrant, exercisable until 2012, to purchase common stock at $.01 per share (B) 174 shs. * 160,233 2 ____________ ____________ 2,192,978 2,135,794 ____________ ____________ CORVEST GROUP, INC A manufacturer and distributor of promotional products. 12% Senior Subordinated Note due 2007 $ 3,863,636 *** 3,761,762 3,477,272 Common Stock (B) 56 shs. *** 96,591 24,145 Limited Partnership Interest (B) 19.32% int. *** 284,869 71,692 Warrant, exercisable until 2007, to purchase common stock at $.01 per share (B) 324 shs. *** 297,203 139,251 ____________ ____________ 4,440,425 3,712,360 ____________ ____________ 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) 3,514 shs. 10/05/01 427,153 395,243 Convertible Preferred Stock, convertible into common stock at $11.84 per share (B) 412 shs. 09/16/04 48,793 46,353 ____________ ____________ 475,946 441,596 ____________ ____________ 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 $ 153,985 07/19/01 143,600 154,196 Common Stock (B) 585 shs. 07/19/01 585,145 625,379 Warrant, exercisable until 2006, to purchase common stock at $.01 per share (B) 297 shs. 07/19/01 250,611 316,970 ____________ ____________ 979,356 1,096,545 ____________ ____________ DIRECTED ELECTRONICS, INC A designer and distributor of brand name automotive security systems, audio products and installation accessories. Class B Common Stock (B) 36,633 shs. 12/22/99 -- 560,480 Limited Partnership Interest (B) 8.70% int. 12/22/99 1 839,839 Warrant, exercisable until 2007, to purchase common stock at $.01 per share (B) 48,569 shs. 12/22/99 -- 743,106 ____________ ____________ 1 2,143,425 ____________ ____________ *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 CORPORATE INVESTORS March 31, 2005 (Unaudited) Shares, Units, Warrants, Ownership or Acquisition CORPORATE RESTRICTED SECURITIES(A)(CONTINUED) Principal Amount Date Cost Fair Value ------------ ------------ ------------ ------------ 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) 27.19% int. 08/27/98 $ 734,090 $ -- Preferred Stock (B) 3,278 shs. 12/14/01 2,784,133 2,088,103 Warrants, exercisable until 2011, to purchase common stock of DHI Holdings, Inc. at $.01 per share (B) 13,352 shs. * 403,427 -- ____________ ____________ 3,921,650 2,088,103 ____________ ____________ DWYER GROUP, INC A franchiser of a variety of home repair services. 14% Senior Subordinated Note due 2011 $ 1,859,375 10/30/03 1,691,079 1,908,571 Common Stock (B) 6,906 shs. ** 690,600 621,540 Warrant, exercisable until 2011, to purchase common stock at $.01 per share (B) 2,034 shs. 10/30/03 186,469 20 ____________ ____________ 2,568,148 2,530,131 ____________ ____________ 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 $ 2,157,258 06/28/04 2,084,778 2,243,549 Warrant, exercisable until 2014, to purchase common stock at $.01 per share (B) 22 shs. 06/28/04 77,208 -- ____________ ____________ 2,161,986 2,243,549 ____________ ____________ EAGLE PACK PET FOODS, INC A manufacturer of premium pet food sold through independent pet stores. 14% Senior Subordinated Note due 2011 $ 1,062,500 09/24/04 1,024,766 1,060,180 Warrant, exercisable until 2011, to purchase common stock at $.01 per share (B) 4,085 shs. 09/24/04 39,464 41 ____________ ____________ 1,064,230 1,060,221 ____________ ____________ EAGLE WINDOW & DOOR HOLDING CO A manufacturer of wood and aluminum-clad wood windows and doors. 12% Senior Subordinated Note due 2010 $ 1,900,000 05/06/02 1,682,819 1,957,000 Common Stock (B) 225 shs. 05/06/02 225,000 490,050 Warrant, exercisable until 2010, to purchase common stock at $.01 per share (B) 441 shs. 05/06/02 285,000 959,801 ____________ ____________ 2,192,819 3,406,851 ____________ ____________ EAST RIVER VENTURES I, L.P. An acquirer of controlling or substantial interests in other entities. Limited Partnership Interest (B) 0.14% int. 01/01/01 28,971 27,300 ____________ ____________ ENZYMATIC THERAPY, INC A manufacturer and distributor of branded natural medicines and nutritional supplements. 13% Senior Subordinated Note due 2006 (B) $ 1,593,750 09/17/02 1,349,781 956,250 Limited Partnership Interest (B) 1.32% int. 03/30/00 531,250 5,313 Warrant, exercisable until 2009, to purchase common stock at $.01 per share (B) 478 shs. 03/30/00 255,000 5 ____________ ____________ 2,136,031 961,568 ____________ ____________ *10/24/96 and 08/28/98. **10/30/03 and 01/02/04. -------------------------------------------------------------------------------- 11 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL CORPORATE INVESTORS March 31, 2005 (Unaudited) Shares, Units, Warrants, Ownership or Acquisition CORPORATE RESTRICTED SECURITIES(A)(CONTINUED) Principal Amount Date Cost Fair Value ------------ ------------ ------------ ------------ 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 $ 2,125,000 09/09/03 $ 2,093,576 $ 1,683,817 Warrant, exercisable until 2011, to purchase common stock at $.01 per share (B) 43,878 shs. 09/09/03 35,641 439 ____________ ____________ 2,129,217 1,684,256 ____________ ____________ EVANS CONSOLES, INC A designer and manufacturer of consoles and control center systems. 10% Senior Secured Note due 2006 $ 136,608 05/06/04 136,608 136,608 Limited Partnership Interest of CM Equity Partners (B) 2.24% int. 02/11/98 128,464 -- Common Stock (B) 90,000 shs. 05/06/04 6 -- ____________ ____________ 265,078 136,608 ____________ ____________ HIGHGATE CAPITAL LLC An acquirer of controlling or substantial interests in manufacturing and marketing entities. Series A Preferred Units (B) 1.19% int. 07/21/94 385,258 2,723 ____________ ____________ HOME DECOR HOLDING COMPANY A designer, manufacturer and marketer of framed art and wall decor products. 12.5% Senior Subordinated Note due 2012 $ 2,043,269 * 1,851,903 2,075,160 Common Stock (B) 63 shs. * 62,742 56,466 Warrant, exercisable until 2012, to purchase common stock at $.01 per share (B) 200 shs. * 199,501 2 ____________ ____________ 2,114,146 2,131,628 ____________ ____________ HUSSEY SEATING CORPORATION A manufacturer of spectator seating products. Senior Secured Floating Rate Revolving Note due 2006 $ 1,544,856 06/12/96 1,544,856 772,428 Senior Secured Floating Rate Note due 2006 $ 433,125 ** 433,125 216,563 12% Senior Subordinated Note due 2006 $ 1,350,000 03/31/03 1,350,000 13,500 Common Stock (B) 4,771 shs. 03/12/04 225,000 -- ____________ ____________ 3,552,981 1,002,491 ____________ ____________ 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 $ 1,617,167 03/01/04 1,614,909 1,540,028 Common Stock (B) 228 shs. 06/01/00 262,200 52,440 ____________ ____________ 1,877,109 1,592,468 ____________ ____________ JASON, INC A diversified manufacturing company serving various industrial markets. 13% Senior Subordinated Note due 2008 $ 963,687 08/04/00 895,696 951,557 14% Cumulative Redeemable Preferred Stock Series A (B) 289 shs. 08/04/00 289,224 284,491 Limited Partnership Interests of Saw Mill Capital Fund II, L.P. (B) 2.50% int. 08/03/00 886,409 664,880 Warrants, exercisable until 2008 and 2009, to purchase common stock at $.01 per share (B) 50,870 shs. 08/04/00 115,412 46,927 ____________ ____________ 2,186,741 1,947,855 ____________ ____________ *06/30/04 and 08/19/04. **06/12/96 and 08/03/01. -------------------------------------------------------------------------------- 12 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL CORPORATE INVESTORS March 31, 2005 (Unaudited) Shares, Units, Warrants, Ownership or Acquisition CORPORATE RESTRICTED SECURITIES(A)(CONTINUED) Principal Amount Date Cost Fair Value ------------ ------------ ------------ ------------ JUSTRITE MANUFACTURING ACQUISITION CO A manufacturer of safety products such as storage cabinets and containers. 12% Senior Subordinated Note due 2011 1,593,750 12/15/04 $ 1,495,086 $ 1,581,957 Warrant, exercisable until 2011, to purchase common stock at $.01 per share (B) 1,121 shs. 12/15/04 101,109 11 ____________ ____________ 1,596,195 1,581,968 ____________ ____________ KEEPSAKE QUILTING, INC A seller of quilting fabrics, books, patterns, kits and notions to consumers. Senior Secured Floating Rate Revolving Note due 2005 $ 36,693 06/16/00 36,693 36,678 Senior Secured Floating Rate Tranche A Note due 2007 $ 610,017 06/16/00 610,017 605,550 12% Senior Secured Tranche B Note due 2008 $ 550,392 06/16/00 526,166 566,904 Limited Partnership Interest of Riverside XVI Holding Company, L.P. (B) 5.29% int. 6/12/00 333,490 250,051 Warrant, exercisable until 2008, to purchase common stock at $.01 per share (B) 1,108 shs. 6/12/00 45,866 83,064 ____________ ____________ 1,552,232 1,542,247 ____________ ____________ KELE AND ASSOCIATES, INC A distributor of building automation control products. 12% Senior Subordinated Note due 2012 $ 1,831,548 02/27/04 1,669,021 1,827,851 Common Stock (B) 35 shs. 02/27/04 462,035 495,126 Warrant, exercisable until 2012, to purchase common stock at $.01 per share (B) 11 shs. 02/27/04 7,793 -- ____________ ____________ 2,138,849 2,322,977 ____________ ____________ KENAN-ADVANTAGE TRANSPORT COMPANY A transporter of light petroleum, petrochemicals, lubricants and residual fuels. 12.5% Senior Subordinated Note due 2009 $ 1,817,435 04/30/01 1,817,435 1,853,784 Preferred Stock (B) 307 shs. 04/30/01 307,000 614,000 Warrant, exercisable until 2009, to purchase common stock at $.01 per share (B) 269 shs. 04/30/01 14 3 ____________ ____________ 2,124,449 2,467,787 ____________ ____________ KEYSTONE NORTH AMERICA, INC An operator of funeral homes in North America. Common Stock (B) 49,216 shs. 02/08/05 236,709 298,249 ____________ ____________ LANCASTER LABORATORIES, INC A laboratory testing operation in the United States. Common Stock (B) 860,842 shs. 09/25/00 589,813 1,530,147 ____________ ____________ 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 $ 3,845,000 * 3,492,330 3,868,142 Common Stock (B) 5,800 shs. * 406,003 324,800 Warrant, exercisable until 2006, to purchase common stock at $.11 per share (B) 15,572 shs. * 602,127 872,032 ____________ ____________ 4,500,460 5,064,974 ____________ ____________ *12/23/98 and 01/28/99. -------------------------------------------------------------------------------- 13 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL CORPORATE INVESTORS March 31, 2005 (Unaudited) Shares, Units, Warrants, Ownership or Acquisition CORPORATE RESTRICTED SECURITIES(A)(CONTINUED) Principal Amount Date Cost Fair Value ------------ ------------ ------------ ------------ MAVERICK ACQUISITION COMPANY A manufacturer of capsules that cover the cork and neck of wine bottles. Senior Secured Floating Rate Revolving Note due 2009 $ 23,507 02/17/05 $ 23,507 $ 23,297 Senior Secured Floating Rate Tranche A Note due 2010 $ 783,582 09/03/04 783,582 774,721 12% Senior Secured Tranche B Note due 2011 $ 313,433 09/03/04 275,837 319,781 Limited Partnership Interest (B) 7.84% int. 09/03/04 58,769 52,892 Warrant, exercisable until 2011, to purchase common stock at $.01 per share (B) 425 shs. 09/03/04 39,473 4 ____________ ____________ 1,181,168 1,170,695 ____________ ____________ MAXON CORPORATION A manufacturer of industrial combustion equipment and related shut-off valves and control valves. 12% Senior Subordinated Note due 2012 $ 962,215 09/30/04 874,675 952,078 8.75% Senior Subordinated Note due 2012 $ 1,281,112 09/30/04 1,281,112 1,281,112 Common Stock (B) 381,672 shs. 09/30/04 381,672 343,505 Warrant, exercisable until 2012, to purchase common stock at $.01 per share (B) 153,572 shs. 09/30/04 90,897 1,536 ____________ ____________ 2,628,356 2,578,231 ____________ ____________ MEDASSIST, INC A provider of patient eligibility and accounts receivable management services to hospitals and physician practices. 12% Senior Subordinated Note due 2011 $ 2,125,000 05/01/03 2,090,947 2,188,750 8% Preferred Stock (B) 84 shs. 10/28/04 83,658 83,217 Common Stock (B) 26,185 shs. 10/02/04 35,088 35,821 Warrant, exercisable until 2013, to purchase common stock at $.01 per share (B) 83,214 shs. 05/01/03 40,675 113,836 ____________ ____________ 2,250,368 2,421,624 ____________ ____________ MOSS, INC A manufacturer and distributor of large display and exhibit structures. Senior Secured Floating Rate Revolving Note due 2007 $ 100,860 03/24/05 100,860 100,860 Senior Secured Floating Rate Tranche A Note due 2007 $ 850,741 09/21/00 850,741 850,741 12% Senior Secured Tranche B Note due 2008 $ 336,200 09/21/00 317,769 336,200 Limited Partnership Interest of Riverside Capital Appreciation Fund I, L.P. (B) 37.37% int. * 311,481 389,333 Warrant, exercisable until 2008, to purchase common stock at $100 per share (B) 463 shs. 09/21/00 40,344 19,235 ____________ ____________ 1,621,195 1,696,369 ____________ ____________ 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) 16,535 shs 12/11/02 493,501 853,474 ____________ ____________ *09/20/00 and 05/23/02. -------------------------------------------------------------------------------- 14 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL CORPORATE INVESTORS March 31, 2005 (Unaudited) Shares, Units, Warrants, Ownership or Acquisition CORPORATE RESTRICTED SECURITIES(A)(CONTINUED) Principal Amount Date Cost Fair Value ------------ ------------ ------------ ------------ NEFF MOTIVATION, INC A manufacturer and distributor of customized awards and sportswear to schools. 12.5% Senior Subordinated Note due 2011 $ 1,062,500 01/31/03 $ 909,562 $ 1,099,787 Warrant, exercisable until 2011, to purchase common stock at $.01 per share (B) 212 shs. 01/31/03 180,625 86,937 ____________ ____________ 1,090,187 1,186,724 ____________ ____________ NONNI'S FOOD COMPANY A producer and distributor of premium biscotti and bagel chips in North America. 12.25% Senior Subordinated Note due 2012 $ 1,863,462 03/29/04 1,856,139 1,938,000 10% Preferred Stock (B) 255 shs. 03/29/04 255,083 263,462 Common Stock (B) 6,455 shs. 03/29/04 6,455 5,810 Warrant, exercisable until 2012, to purchase common stock at $.01 per share (B) 8,622 shs. 03/29/04 7,323 86 ____________ ____________ 2,125,000 2,207,358 ____________ ____________ 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 $ 326,398 06/25/99 326,398 321,878 Senior Secured Floating Rate Note due 2006 $ 1,881,992 06/25/99 1,881,966 1,854,833 12% Senior Secured Tranche B Note due 2007 $ 978,814 06/25/99 920,724 978,814 Limited Partnership Interest of Riverside XIII Holding Company L.P. (B) 3.38% int. 06/11/99 296,883 221,438 Warrant, exercisable until 2007, to purchase common stock at $.01 per share (B) 201 shs. 06/25/99 142,373 2 ____________ ____________ 3,568,344 3,376,965 ____________ ____________ NYLONCRAFT, INC A supplier of engineered plastic components for the automotive industry. 9% Senior Secured Note due 2009 $ 812,500 01/28/02 812,500 895,277 11.5% Senior Subordinated Note due 2012 $ 1,500,000 01/28/02 1,371,644 1,660,248 Common Stock (B) 312,500 shs. 01/28/02 312,500 326,250 Warrant, exercisable until 2012, to purchase common stock at $.01 per share (B) 243,223 shs. 01/28/02 162,045 251,736 ____________ ____________ 2,658,689 3,133,511 ____________ ____________ OLYMPIC SALES, INC A boat retailer in Washington state, Oregon, California and British Columbia. 12% Senior Subordinated Note due 2006 $ 2,774,000 08/07/98 2,774,000 2,625,476 12% Senior Subordinated Note due 2008 $ 307,071 02/09/00 289,961 276,850 Limited Partnership Interest of Riverside VIII, VIII-A and VIII-B Holding Company, L.P. (B) 1,531,250 uts. * 1,555,768 798,930 Warrants, exercisable until 2007 and 2008, to purchase common stock at $.01 per share (B) 28,648 shs. ** 389,188 287 ____________ ____________ 5,008,917 3,701,543 ____________ ____________ *08/07/98, 02/23/99, 12/22/99 and 02/25/03. **08/07/98 and 02/09/00. -------------------------------------------------------------------------------- 15 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL CORPORATE INVESTORS March 31, 2005 (Unaudited) Shares, Units, Warrants, Ownership or Acquisition CORPORATE RESTRICTED SECURITIES(A)(CONTINUED) Principal Amount Date Cost Fair Value ------------ ------------ ------------ ------------ 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 $ 2,125,000 12/19/00 $ 1,964,093 $ 2,146,250 Membership Interests of MM/Lincap PPI Investments, Inc., LLC (B) 2.42% int. 12/21/00 265,625 597,656 ____________ ____________ 2,229,718 2,743,906 ____________ ____________ 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 $ 2,125,000 10/25/02 1,870,015 2,125,000 Warrant, exercisable until 2010, to purchase common stock at $.02 per share (B) 351 shs. 10/25/02 296,747 702,360 ____________ ____________ 2,166,762 2,827,360 ____________ ____________ PRECISION DYNAMICS, INC A manufacturer of custom-designed solenoid valves and controls. Senior Secured Floating Rate Revolving Credit Facility due 2005 $ 733,500 07/22/96 733,500 733,500 Senior Secured Floating Rate Term Note due 2005 $ 415,650 07/22/96 285,250 285,250 12% Senior Secured Term Note due 2005 $ 326,000 07/22/96 322,725 326,000 8% Preferred Stock (B) 438 shs. 07/22/96 232,046 232,046 Common Stock (B) 599 shs. 07/22/96 28,978 28,978 Warrant, exercisable until 2005, to purchase common stock at $.01 per share (B) 322 shs. 07/22/96 97,800 3 ____________ ____________ 1,700,299 1,605,777 ____________ ____________ PROCESS CHEMICALS LLC A specialty chemical company that manufactures processed chemicals for the fertilizer, asphalt and concrete industries. Common Membership Interests 2 uts. * 4 288,000 ____________ ____________ 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) 1,004 shs. 08/12/94 100,350 -- Common Stock (B) 2,600 shs. ** 126,866 -- ____________ ____________ 227,216 -- ____________ ____________ 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) 197,040 shs. 09/16/99 1 801,990 ____________ ____________ *07/31/97 and 01/04/99. **11/14/01 and 08/12/94. -------------------------------------------------------------------------------- 16 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL CORPORATE INVESTORS March 31, 2005 (Unaudited) Shares, Units, Warrants, Ownership or Acquisition CORPORATE RESTRICTED SECURITIES(A)(CONTINUED) Principal Amount Date Cost Fair Value ------------ ------------ ------------ ------------ QUALIS AUTOMOTIVE LLC A distributor of aftermarket automotive brake and chassis products. 12% Senior Subordinated Note due 2012 $ 1,770,834 05/28/04 $ 1,418,559 $ 1,825,645 Common Stock (B) 354,166 shs. 05/28/04 354,166 318,749 Warrant, exercisable until 2012, to purchase common stock at $.01 per share (B) 377,719 shs. 05/28/04 377,719 3,777 ____________ ____________ 2,150,444 2,148,171 ____________ ____________ QUALSERV CORPORATION A provider of foodservice equipment and supplies, to major restaurant chains and their franchisees. 14% Senior Subordinated Note due 2012 $ 1,874,561 07/09/04 1,837,637 1,778,988 Limited Partnership Interest (B) 9.26% int. 07/09/04 259,146 233,231 Warrant, exercisable until 2012, to purchase common stock at $.01 per share (B) 528 shs. 07/09/04 49,061 5 ____________ ____________ 2,145,844 2,012,224 ____________ ____________ RIVER RANCH FRESH FOODS LLC A supplier of fresh produce to the retail and foodservice channels. 13% Senior Subordinated Note due 2011 $ 1,841,667 09/29/04 1,690,430 1,815,836 Limited Partnership Interest (B) 40,610 uts. 09/29/04 283,333 255,000 Warrant, exercisable until 2011, to purchase common stock at $.01 per share (B) 23,715 shs. 09/29/04 157,903 236 ____________ ____________ 2,131,666 2,071,072 ____________ ____________ ROYAL BATHS MANUFACTURING COMPANY A manufacturer and distributor of acrylic and cultured marble bathroom products. 12.5% Senior Subordinated Notes due 2011 $ 1,062,500 11/14/03 951,919 1,038,086 Warrant, exercisable until 2011, to purchase common stock at $.01 per share (B) 140 shs. 11/14/03 122,946 1 ____________ ____________ 1,074,865 1,038,087 ____________ ____________ 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 $ 1,271,984 06/02/99 1,154,207 1,154,207 12% Senior Secured Tranche B Note Due 2007 $ 1,130,652 06/02/99 1,130,652 1,130,652 Class B Common Stock (B) 1,480 shs. 06/02/99 256,212 508,125 ____________ ____________ 2,541,071 2,792,984 ____________ ____________ SAVAGE SPORTS HOLDING, INC A manufacturer of sporting firearms. 12% Senior Subordinated Note due 2012 $ 1,538,793 09/10/04 1,429,186 1,556,819 Common Stock (B) 586 shs. 09/10/04 586,207 527,589 Warrant, exercisable until 2012, to purchase common stock at $.01 per share (B) 134 shs. 09/10/04 113,578 1 ____________ ____________ 2,128,971 2,084,409 ____________ ____________ -------------------------------------------------------------------------------- 17 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL CORPORATE INVESTORS March 31, 2005 (Unaudited) Shares, Units, Warrants, Ownership or Acquisition CORPORATE RESTRICTED SECURITIES(A)(CONTINUED) Principal Amount Date Cost Fair Value ------------ ------------ ------------ ------------ SELIG ACQUISITION CORPORATION A manufacturer of container sealing materials for bottles used in consumer products. 12% Senior Subordinated Note due 2009 $ 2,125,000 06/13/02 $ 1,995,032 $ 2,163,250 Warrant, exercisable until 2009, to purchase common stock at $.01 per share (B) 2,011 shs. 06/13/02 182,023 593,157 ____________ ____________ 2,177,055 2,756,407 ____________ ____________ SHELTER ACQUISITION, INC A distributor of roofing supplies and products throughout the Midwest. 12.5% Senior Subordinated Note due 2008 $ 1,517,857 08/01/02 1,373,689 1,548,214 Common Stock (B) 901,775 shs. * 901,775 811,598 Warrant, exercisable until 2009, to purchase common stock at $.01 per share (B) 263,444 shs. 08/01/02 216,446 2,634 ____________ ____________ 2,491,910 2,362,446 ____________ ____________ SNYDER INDUSTRIES, INC A manufacturer of proprietary rotationally molded polyethylene containers. 12.25% Senior Subordinated Note due 2008 $ 3,125,000 12/06/99 2,877,199 3,125,000 Warrant, exercisable until 2007, to purchase common stock at $.01 per share (B) 513 shs. 12/06/99 426,136 160,441 ____________ ____________ 3,303,335 3,285,441 ____________ ____________ SPECIALTY FOODS GROUP, INC A manufacturer and distributor of branded meat products. Limited Partnership Interest of MHD Holdings LLC (B) 1.43% int. 08/29/00 525,155 127,746 ____________ ____________ 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) 106,539 shs. 01/14/00 658,751 -- ____________ ____________ SYNVENTIVE EQUITY LLC A manufacturer of hot runner systems used in the plastic injection molding process. 12% Senior Subordinated Note due 2007 $ 1,841,667 08/21/03 1,782,467 1,878,500 Limited Partnership Interest (B) 1.99% int. 08/20/03 283,333 1,257,999 Warrant, exercisable until 2011, to purchase common stock at $.01 per share (B) 86,780 shs. 08/21/03 85,000 385,303 ____________ ____________ 2,150,800 3,521,802 ____________ ____________ *08/01/02, 01/17/03 and 12/31/04. -------------------------------------------------------------------------------- 18 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL CORPORATE INVESTORS March 31, 2005 (Unaudited) Shares, Units, Warrants, Ownership or Acquisition CORPORATE RESTRICTED SECURITIES(A)(CONTINUED) Principal Amount Date Cost Fair Value ------------ ------------ ------------ ------------ 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 $ 314,453 03/01/05 $ 314,453 $ 313,657 Senior Secured Floating Rate Term B Note due 2012 $ 369,141 03/01/05 369,141 367,929 12% Senior Subordinated Note due 2013 $ 1,025,391 03/01/05 969,230 1,011,022 Limited Partnership Interest of Saw Mill Capital Fund V, L.P. (B) 412 uts. 03/01/05 412,207 370,989 Warrant, exercisable until 2015, to purchase common stock at $.01 per share (B) 65 shs. 03/01/05 56,171 1 ____________ ____________ 2,121,202 2,063,598 ____________ ____________ 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 $ 2,712,000 02/05/98 2,500,496 2,712,000 Common Stock (B) 630 shs. 02/04/98 630,000 534,477 Warrant, exercisable until 2006, to purchase common stock at $.01 per share (B) 444 shs. 02/05/98 368,832 376,675 ____________ ____________ 3,499,328 3,623,152 ____________ ____________ TIDEWATER HOLDINGS, INC An operator of a barge transportation line on the Columbia/Snake River system. 17% Preferred Stock (B) 560 shs. 12/23/02 560,000 756,000 Convertible Preferred Stock, convertible into common stock at $1,000 per share (B) 1,120 shs. 07/25/96 1,120,000 1,512,000 Warrant, exercisable until 2008, to purchase common stock at $.01 per share (B) 474 shs. 07/25/96 48,216 639,576 ____________ ____________ 1,728,216 2,907,576 ____________ ____________ TOMAH HOLDINGS, INC A manufacturer of specialty chemicals. 16% Senior Subordinated Note due 2011 $ 1,461,764 12/08/03 1,413,621 1,520,235 16% Preferred Stock Series A (B) 37 shs. 12/08/03 631,630 656,991 Common Stock (B) 5,269 shs. 12/08/03 131,471 118,323 ____________ ____________ 2,176,722 2,295,549 ____________ ____________ 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 $ 1,184,565 01/20/00 1,184,565 1,211,159 12% Senior Subordinated Note due 2010 $ 1,326,500 01/20/00 1,266,417 1,375,072 Common Stock (B) 227,400 shs. 01/20/00 227,400 181,920 Warrant, exercisable until 2010, to purchase common stock at $1 per share (B) 260,563 shs. 01/20/00 98,540 2,606 ____________ ____________ 2,776,922 2,770,757 ____________ ____________ -------------------------------------------------------------------------------- 19 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL CORPORATE INVESTORS March 31, 2005 (Unaudited) Shares, Units, Warrants, Ownership or Acquisition CORPORATE RESTRICTED SECURITIES(A)(CONTINUED) Principal Amount Date Cost Fair Value ------------ ------------ ------------ ------------ TRUSTILE DOORS, INC A manufacturer and distributor of interior doors. 12.5% Senior Subordinated Note due 2010 $ 1,062,500 04/11/03 $ 985,043 $ 1,076,233 Warrant, exercisable until 2010, to purchase common stock at $.01 per share (B) 5,781 shs. 04/11/03 95,625 58 ____________ ____________ 1,080,668 1,076,291 ____________ ____________ 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 $ 1,234,551 05/28/04 1,110,482 1,189,720 8.75% Senior Secured Note due 2011 $ 716,292 05/28/04 716,292 697,776 Common Stock (B) 674,157 shs. 05/28/04 674,157 505,618 Warrant, exercisable until 2012, to purchase common stock at $.01 per share (B) 203,912 shs. 05/28/04 130,789 2,039 ____________ ____________ 2,631,720 2,395,153 ____________ ____________ TVI, INC A retailer of used clothing in the United States, Canada and Australia. Common Stock (B) 354,167 shs. 05/02/00 354,167 414,375 ____________ ____________ 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 $ 1,789,474 08/06/03 1,527,203 1,828,937 Preferred Stock (B) 3,345 shs. 08/06/03 334,494 334,495 Common Stock (B) 1,032 shs. 08/06/03 1,032 1,032 Warrant, exercisable until 2011, to purchase common stock at $.01 per share (B) 949 shs. 08/06/03 298,198 949 ____________ ____________ 2,160,927 2,165,413 ____________ ____________ U-LINE CORPORATION A manufacturer of high-end, built-in, undercounter icemaking, wine storage and refrigeration appliances. 12.5% Senior Subordinated Note due 2012 $ 1,882,100 04/30/04 1,683,228 1,909,482 10% Junior Subordinated Note due 2012 $ 63,735 04/30/04 63,750 63,835 Common Stock (B) 182 shs. 04/30/04 182,200 163,980 Warrant, exercisable until 2012, to purchase common stock at $1 per share (B) 230 shs. 04/30/04 211,736 2 ____________ ____________ 2,140,914 2,137,299 ____________ ____________ VICTORY VENTURES LLC An acquirer of controlling or substantial interests in other entities. Series A Preferred Units (B) 0.13% int. 12/02/96 1 2 ____________ ____________ -------------------------------------------------------------------------------- 20 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL CORPORATE INVESTORS March 31, 2005 (Unaudited) Shares, Units, Warrants, Ownership or Acquisition CORPORATE RESTRICTED SECURITIES(A)(CONTINUED) Principal Amount Date Cost Fair Value ------------ ------------ ------------ ------------ VITALITY FOODSERVICE, INC A non-carbonated beverage dispensing company focused on the foodservice industry. 13% Senior Subordinated Note due 2011 $ 1,887,288 09/24/04 $ 1,708,635 $ 1,929,403 Common Stock (B) 23,771 shs. 09/24/04 237,710 213,939 Warrant, exercisable until 2011, to purchase common stock at $.01 per share (B) 23,787 shs. 09/24/04 186,883 238 ____________ ____________ 2,133,228 2,143,580 ____________ ____________ 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 $ 1,700,000 07/19/04 1,483,065 1,703,382 Limited Partnership Interest Class A (B) 414,375 uts. 07/19/04 414,375 372,938 Limited Partnership Interest Class B (B) 182,935 uts. 07/19/04 182,935 164,642 ____________ ____________ 2,080,375 2,240,962 ____________ ____________ WALLS INDUSTRIES, INC A provider of branded workwear and sporting goods apparel. 10% Senior Subordinated Lien Note due 2009 $ 1,006,579 07/12/04 1,006,579 992,710 14% Senior Subordinated Note due 2012 $ 1,048,440 07/12/04 1,041,026 1,028,730 Limited Partnership Interest (B) 0.40% int. 07/12/04 37,281 33,553 Warrant, exercisable until 2014, to purchase common stock at $.01 per share (B) 4,029 shs. 07/12/04 2,833 40 ____________ ____________ 2,087,719 2,055,033 ____________ ____________ WASHINGTON INVENTORY SERVICES, INC A provider of physical inventory taking and other related services to retailers. 12.5% Senior Subordinated Note due 2011 $ 1,075,768 11/03/00 1,051,186 1,086,526 Senior Preferred Stock (B) 4,692 shs. 11/01/00 224,031 219,228 Class B Common Stock (B) 8,959 shs. 11/01/00 8,959 82,486 Warrant, exercisable until 2011, to purchase common stock at $.01 per share (B) 3,979 shs. 11/03/00 -- 36,599 ____________ ____________ 1,284,176 1,424,839 ____________ ____________ WEASLER HOLDINGS LLC A manufacturer of mechanical power transmission components for the agricultural, lawn and turf industries. Limited Partnership Interest (B) 1.55% int. 02/03/03 101,190 141,666 Warrant, exercisable until 2010, to purchase common stock at $.01 per share (B) 256 shs. 02/04/03 209,829 358,764 ____________ ____________ 311,019 500,430 ____________ ____________ TOTAL PRIVATE PLACEMENT INVESTMENTS $157,477,161 $158,086,994 ____________ ____________ -------------------------------------------------------------------------------- 21 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL CORPORATE INVESTORS March 31, 2005 (Unaudited) Shares or Interest Due Principal CORPORATE RESTRICTED SECURITIES (A) (CONTINUED) Rate Date Amount Cost Fair Value ---- ---- ------ ---- ------------ RULE 144A SECURITIES - 6.81%: BONDS - 6.45% A E P Corporation 7.875% 03/15/13 $ 175,000 $ 175,000 $ 175,743 A E S Corporation 9.000 05/15/15 200,000 200,000 220,000 Activant Solutions, Inc. 9.010 04/01/10 825,000 825,000 841,500 Affinia Group, Inc. 9.000 11/30/14 460,000 460,000 425,500 BCP Caylux Holding Lux SCA 9.625 06/15/14 485,000 485,000 552,900 Blockbuster, Inc. 9.000 09/01/12 475,000 477,148 460,750 Bombardier, Inc. 6.300 05/01/14 1,000,000 890,000 840,000 C C O Holdings LLC 6.615 12/15/10 500,000 500,000 495,000 Cablevision Systems Corporation 6.669 04/01/09 1,000,000 1,000,000 1,060,000 Calpine Corporation 8.750 07/15/13 500,000 465,000 377,500 Charter Communications Op LLC 8.000 04/30/12 250,000 249,375 248,750 Douglas Dynamics LLC 7.750 01/15/12 630,000 634,113 617,400 GulfMark Offshore, Inc. 7.750 07/15/14 565,000 562,599 581,950 IAAI Finance Corporation 11.000 04/01/13 800,000 799,437 794,937 Intelsat Bermuda, Ltd. 8.250 01/15/13 500,000 500,000 505,000 Intelsat Bermuda, Ltd. 7.805 01/15/12 450,000 450,000 456,750 Interactive Health LLC 7.250 04/01/11 900,000 741,672 819,000 Jostens I H Corporation 7.625 10/01/12 750,000 750,000 742,500 Magnachip Semiconductor 8.000 12/15/14 100,000 100,000 102,250 Markwest Energy 6.875 11/01/14 475,000 475,000 475,000 Metaldyne Corporation 10.000 11/01/13 510,000 513,956 464,100 N R G Energy, Inc. 8.000 12/15/13 548,000 548,000 579,510 PQ Corporation 7.500 02/15/13 350,000 350,000 344,750 Siebe PLC 6.500 01/15/10 650,000 572,000 594,750 Tekni-Plex, Inc. 8.750 11/15/13 650,000 656,459 615,875 Texas Genco LLC 6.875 12/15/14 705,000 705,000 706,763 Universal City Florida 8.375 05/01/10 200,000 200,000 204,000 Universal City Florida 7.493 05/01/10 200,000 200,000 207,000 ____________ ____________ ____________ TOTAL BONDS $ 14,853,000 14,484,759 14,509,178 ____________ ____________ ____________ COMMON STOCK - 0.00% Jordan Telecom Products (B) 70 $ 14,000 -- ____________ ____________ TOTAL COMMON STOCK 14,000 -- ____________ ____________ CONVERTIBLE BONDS - 0.36% Cymer, Inc. 3.500% 02/15/09 850,000 850,000 801,125 ____________ ____________ ____________ TOTAL CONVERTIBLE BONDS $ 850,000 850,000 801,125 ____________ ____________ ____________ WARRANTS - 0.00% Winsloew Furniture, Inc. (B) 900 $ 9 $ 14 ____________ ____________ TOTAL WARRANTS 9 14 ____________ ____________ TOTAL RULE 144A SECURITIES 15,348,768 15,310,317 ____________ ____________ TOTAL CORPORATE RESTRICTED SECURITIES $172,825,929 $173,397,311 ____________ ____________ -------------------------------------------------------------------------------- 22 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL CORPORATE INVESTORS March 31, 2005 (Unaudited) Interest Due Principal CORPORATE PUBLIC SECURITIES - 28.72%:(A) Rate Date Amount Cost Market Value ---- ---- ------ ---- ------------ BONDS - 25.47% Abitibi-Consolidated, Inc. 7.750% 06/15/11 $ 1,000,000 $ 1,035,538 $ 980,000 Activant Solutions, Inc. 10.500 06/15/11 585,000 585,042 623,025 Aearo Co. 8.250 04/15/12 450,000 450,000 474,750 Alamosa Delaware, Inc. 11.000 07/31/10 325,000 330,128 369,688 Alamosa Delaware, Inc. 8.500 01/31/12 400,000 400,000 414,500 Alh Fin LLC/ALH Fin Corporation 8.500 01/15/13 475,000 472,625 463,125 Allied Waste NA 7.875 04/15/13 1,000,000 1,026,704 997,500 American Media Operation, Inc. 8.875 01/15/11 900,000 901,625 927,000 Appleton Papers Inc 8.125 06/15/11 300,000 300,000 309,750 Argo Tech Corporation 9.250 06/01/11 850,000 850,000 913,750 Bally Total Fitness Holding Corporation 9.875 10/15/07 135,000 128,925 114,075 C S C Holdings, Inc. 7.625 04/01/11 500,000 502,107 520,000 Cadmus Communications Corporation 8.375 06/15/14 750,000 750,000 783,750 Cenveo Corporation 7.875 12/01/13 1,100,000 1,100,000 981,750 Charter Comm Holdings LLC 10.000 04/01/09 1,000,000 815,000 810,000 Chemed Corporation 8.750 02/24/11 1,125,000 1,125,000 1,223,438 Chesapeake Energy Corporation 7.000 08/15/14 325,000 325,000 334,750 Cincinnati Bell, Inc. 8.375 01/15/14 1,100,000 1,007,500 1,083,500 Collins & Aikman Products Co. 10.750 12/31/11 1,000,000 1,026,879 822,500 Del Monte Corporation 8.625 12/15/12 225,000 225,000 243,563 Dollar Financial Group 9.750 11/15/11 600,000 600,000 639,000 Dominos, Inc. 8.250 07/01/11 292,000 289,892 305,140 Dynegy Holdings, Inc. 6.875 04/01/11 500,000 422,500 443,750 El Paso Corporation 7.875 06/15/12 300,000 303,622 298,500 Esterline Technologies 7.750 06/15/13 200,000 200,000 208,000 Flextronics Intl Ltd. 6.500 05/15/13 400,000 400,000 397,000 G F S I, Inc. 9.625 03/01/07 750,000 676,926 720,000 Gencorp, Inc. 9.500 08/15/13 259,000 259,000 288,785 General Motors Acceptance Corporation 7.750 01/19/10 1,000,000 1,064,301 960,496 General Nutrition Center 8.500 12/01/10 800,000 800,000 680,000 Goodyear Tire & Rubber Co. 7.857 08/15/11 650,000 607,750 627,250 Great Lakes Dredge & Dock Corporation 7.750 12/15/13 750,000 679,250 622,500 Houghton Mifflin Co. 9.875 02/01/13 1,000,000 1,054,319 1,030,000 Huntsman LLC 11.625 10/15/10 324,000 320,161 379,080 Interpool, Inc. 7.350 08/01/07 750,000 764,716 772,500 Koppers Inc. 9.875 10/15/13 700,000 700,000 780,500 Land O'Lakes, Inc. 9.000 12/15/10 750,000 750,000 810,000 Leucadia National Corporation 7.000 08/15/13 650,000 663,223 648,375 Liberty Media Corporation 5.700 05/15/13 1,000,000 951,610 942,530 Lodgenet Entertainment Corporation 9.500 06/15/13 425,000 425,000 463,250 Lyondell Chemical Co. 9.500 12/15/08 900,000 919,069 963,000 M C I, Inc. 8.735 05/01/14 500,000 452,500 550,000 M G M Mirage, Inc. 6.000 10/01/09 375,000 380,134 369,844 M S X International, Inc. 11.000 10/15/07 350,000 347,004 350,000 Majestic Star Casino LLC 9.500 10/15/10 500,000 500,000 523,125 Manitowoc Company, Inc. 7.125 11/01/13 200,000 200,000 206,000 Mediacom LLC 9.500 01/15/13 1,000,000 1,003,669 997,500 -------------------------------------------------------------------------------- 23 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL CORPORATE INVESTORS March 31, 2005 (Unaudited) Shares or Interest Due Principal CORPORATE PUBLIC SECURITIES (A) (CONTINUED) Rate Date Amount Cost Market Value ---- ---- ------ ---- ------------ Merrill Corporation 12.000% 05/01/09 $ 1,500,000 $ 1,586,039 $ 1,593,750 Metaldyne Corporation 11.000 06/15/12 750,000 601,250 607,500 Moog, Inc. 6.250 01/15/15 120,000 120,000 117,600 Mrs Fields Brands/Finance 11.500 03/15/11 750,000 713,710 750,000 Nalco Co. 7.750 11/15/11 500,000 500,000 520,000 National Wine & Spirit Inc. 10.125 01/15/09 500,000 485,250 500,000 Neff Corporation 10.250 06/01/08 170,000 168,063 149,600 North American Energy Partners 8.750 12/01/11 400,000 400,000 360,000 Numatics, Inc. 9.625 04/01/08 550,000 539,353 500,500 O E D Corp/Diamond Jo Company Guarantee 8.750 04/15/12 1,000,000 985,960 942,500 O M Group, Inc. 9.250 12/15/11 750,000 776,445 772,500 Offshore Logistics, Inc. 6.125 06/15/13 450,000 450,000 427,500 Pacific Energy Partners 7.125 06/15/14 500,000 504,341 517,500 Pinnacle Foods Group 8.250 12/01/13 450,000 450,000 384,750 Pliant Corporation 13.000 06/01/10 1,000,000 936,875 845,000 Pliant Corporation 0.000 06/15/09 875,000 770,993 787,500 Primedia, Inc. 8.000 05/15/13 1,000,000 1,027,158 1,020,000 Quintiles Transnational Corporation 10.000 10/01/13 500,000 500,000 562,500 Rayovac Corporation 8.500 10/01/13 200,000 200,000 206,000 Rent-A-Center, Inc. 7.500 05/01/10 400,000 400,000 398,000 Rent-Way, Inc. 11.875 06/15/10 800,000 844,813 886,000 Rhodia SA 10.250 06/01/10 800,000 828,263 872,000 Rhodia SA 8.875 06/01/11 500,000 499,668 486,250 Rogers Wireless, Inc. 7.250 12/15/12 165,000 165,000 168,300 Rogers Wireless, Inc. 8.000 12/15/12 165,000 165,000 169,538 Rogers Wireless, Inc. 7.500 03/15/15 120,000 120,000 123,900 Sea Containers Ltd 10.500 05/15/12 785,000 765,961 848,778 Service Corporation International 6.000 12/15/05 41,000 41,138 41,000 Sheridan Acquisition Corp. 10.250 08/15/11 375,000 370,001 398,438 Ship Finance Intl Ltd 8.500 12/15/13 750,000 750,000 742,500 Sports Club Co. 11.375 03/15/06 150,000 145,500 147,750 Stanadyne Corporation 10.000 08/15/14 1,500,000 1,500,000 1,545,000 Tekni-Plex, Inc. 12.750 06/15/10 1,000,000 960,125 835,000 Telex Communications, Inc. 11.500 10/15/08 500,000 500,000 547,500 Telex Communications, Inc. 0.000 01/15/09 471,915 206,820 283,149 Tenet Healthcare Corporation 6.375 12/01/11 500,000 482,500 461,250 Tenet Healthcare Corporation 9.875 07/01/14 500,000 488,370 520,000 Thermadyne Holdings Corporation 9.250 02/01/14 1,000,000 986,250 960,000 Triton P C S, Inc. 8.500 06/01/13 550,000 550,000 506,000 United Rentals, Inc. 7.750 11/15/13 625,000 625,000 606,250 United Rentals, Inc. 7.000 02/15/14 500,000 500,000 457,500 Utilicorp United, Inc. 9.950 02/01/11 1,000,000 1,103,761 1,120,000 Vicorp Restaurants Inc 10.500 04/15/11 600,000 592,746 612,000 Vought Aircraft Industries 8.000 07/15/11 1,000,000 1,000,883 985,000 Warner Music Group 7.375 04/15/14 275,000 275,000 283,250 Williams Scotsman, Inc. 9.875 06/01/07 500,000 492,500 497,500 Wornick Co. 10.875 07/15/11 750,000 750,000 783,750 ____________ ____________ ____________ TOTAL BONDS $ 57,757,915 56,916,455 57,216,842 ____________ ____________ ____________ -------------------------------------------------------------------------------- 24 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL CORPORATE INVESTORS March 31, 2005 (Unaudited) Shares or Interest Due Principal CORPORATE PUBLIC SECURITIES (A) (CONTINUED) Rate Date Amount Cost Market Value ---- ---- ------ ---- ------------ COMMON STOCK - 2.81% Dolby Laboratories, Inc. (B) 100 $ 1,800 $ 2,350 H C I Direct, Inc. (B) 1,000 -- -- PepsiAmericas, Inc. 92,145 2,006,365 2,088,006 Rent-Way, Inc. (B) 92,866 916,263 761,501 Shamir Optical Industry Ltd (B) 3,300 46,200 50,985 Supreme Industries, Inc. 115,723 267,326 725,580 Telex Communications, Inc. (B) 18,196 8 18,196 Transmontaigne, Inc. (B) 333,326 1,109,177 2,666,608 ------------ ------------ TOTAL COMMON STOCK 4,347,139 6,313,226 ------------ ------------ CONVERTIBLE BONDS - 0.44% Leucadia National Corporation 3.750% 04/15/14 $ 1,000,000 $ 1,000,000 $ 987,500 ------------ ------------ ------------ TOTAL CONVERTIBLE BONDS $ 1,000,000 1,000,000 987,500 ============ ------------ ------------ TOTAL CORPORATE PUBLIC SECURITIES $ 62,263,594 $ 64,517,568 ------------ ------------ Interest Due Principal SHORT-TERM SECURITIES: Rate/Yield Date Amount Cost Market Value ---------- ---- ------ ---- ------------ COMMERCIAL PAPER - 4.25% Alcoa, Inc. 2.840% 04/07/05 $ 3,577,000 $ 3,575,307 $ 3,575,307 Baxter International, Inc. 2.810 04/01/05 3,000,000 3,000,000 3,000,000 Baxter International, Inc. 2.820 04/05/05 791,000 790,752 790,752 Countrywide Home Loans, Inc. 2.850 04/04/05 2,175,000 2,174,483 2,174,483 ------------ ------------ ------------ TOTAL SHORT-TERM SECURITIES $ 9,543,000 $ 9,540,542 $ 9,540,542 ============ ------------ ------------ TOTAL INVESTMENTS 110.13% $244,630,065 $247,455,421 ============ ------------ Other Assets 3.89 8,729,019 Liabilities (14.02) (31,498,392) ------ ------------ TOTAL NET ASSETS 100.00% $224,686,048 ====== ============ (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 CORPORATE INVESTORS March 31, 2005 (Unaudited) Fair Value/ Fair Value/ INDUSTRY CLASSIFICATION: Market Value INDUSTRY CLASSIFICATION:(CONT.) Market Value -------------- -------------- AEROSPACE - 1.31% BUILDINGS & REAL ESTATE - 5.09% Argo Tech Corporation $ 913,750 A W C Holding Company $ 2,159,297 Bombardier, Inc. 840,000 Adorn, Inc. 2,430,290 Esterline Technologies 208,000 Eagle Window & Door Holding Co. 3,406,851 Vought Aircraft Industries 985,000 Shelter Acquisition, Inc. 2,362,446 -------------- TruStile Doors, Inc. 1,076,291 2,946,750 -------------- -------------- 11,435,175 AUTOMOBILE - 8.28% -------------- America's Body Company, Inc./LCP Holding Co. 3,500,002 CARGO TRANSPORT - 2.72% Collins & Aikman Products Co. 822,500 Kenan-Advantage Transport Company 2,467,787 Gencorp, Inc. 288,785 Ship Finance International Ltd. 742,500 Goodyear Tire & Rubber Co. 627,250 Tidewater Holdings, Inc. 2,907,576 Jason, Inc. 1,947,855 -------------- LIH Investors, L.P. 5,064,974 6,117,863 Metaldyne Corporation 1,071,600 -------------- Nyloncraft, Inc. 3,133,511 CHEMICAL, PLASTICS & RUBBER - 3.19% Qualis Automotive LLC 2,148,171 Capital Specialty Plastics, Inc. 503 Tenneco Automotive, Inc. -- Huntsman LLC 379,080 -------------- Koppers Inc. 780,500 18,604,648 Lyondell Chemical Co. 963,000 -------------- O M Group, Inc. 772,500 BEVERAGE, DRUG & FOOD - 6.16% PQ Corporation 344,750 Beta Brands Ltd -- Process Chemicals LLC 288,000 Cains Foods, L.P. 500,619 Rhodia SA 1,358,250 Del Monte Corporation 243,563 Tomah Holdings, Inc. 2,295,549 Dominos, Inc. 305,140 -------------- Eagle Pack Pet Foods, Inc. 1,060,221 7,182,132 Land O' Lakes, Inc. 810,000 -------------- National Wine & Spirit Inc. 500,000 CONSUMER PRODUCTS - 8.27% Nonni's Food Company, Inc. 2,207,358 Alh Fin LLC / ALH Fin Corporation 463,125 PepsiAmericas, Inc. 2,088,006 Appleton Papers, Inc. 309,750 Pinnacle Foods Holdings 384,750 Augusta Sportswear Holding Co. 2,135,265 River Ranch Fresh Foods LLC 2,071,072 Colibri Holdings Corporation 1,914,171 Specialty Foods Group, Inc. 127,746 Euro-Pro Corporation 1,684,256 Vicorp Restaurants, Inc. 612,000 G F S I, Inc. 720,000 Vitality Foodservice, Inc. 2,143,580 H C I Direct, Inc. -- Wornick Co. 783,750 Maverick Acquisition Company 1,170,695 -------------- Neff Motivation, Inc. 1,186,724 13,837,805 Rayovac Corporation 206,000 -------------- Royal Baths Manufacturing Company 1,038,087 BROADCASTING & Savage Sports Holding, Inc. 2,084,409 ENTERTAINMENT - 2.90% The Tranzonic Companies 3,623,152 C C O Holdings LLC 495,000 Walls Industries, Inc. 2,055,033 C S C Holdings, Inc. 520,000 Winsloew Furniture, Inc. 14 Cablevision Systems Corporation 1,060,000 -------------- Cenveo Corporation 981,750 18,590,681 Charter Communications Holdings LLC 810,000 -------------- Charter Communications Op LLC 248,750 CONTAINERS, PACKAGING & GLASS - 6.73% Liberty Media Corporation 942,530 A E P Industries, Inc. 175,743 Lodgenet Entertainment Corporation 463,250 Paradigm Packaging, Inc. 2,743,906 Mediacom LLC 997,500 Pliant Corporation 1,632,500 -------------- Sea Containers Ltd. 848,778 6,518,780 Selig Acquisition Corporation 2,756,407 -------------- Snyder Industries, Inc. 3,285,441 Tekni-Plex, Inc. 1,450,875 Vitex Packaging, Inc. 2,240,962 -------------- 15,134,612 -------------- -------------------------------------------------------------------------------- 26 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT) MASSMUTUAL CORPORATE INVESTORS March 31, 2005 (Unaudited) Fair Value/ Fair Value/ INDUSTRY CLASSIFICATION: (CONT.) Market Value INDUSTRY CLASSIFICATION:(CONT.) Market Value -------------- -------------- DISTRIBUTION - 4.52% FARMING & AGRICULTURE - 0.00% Affinia Group, Inc. $ 425,500 Protein Genetics, Inc. $ -- Brampton Fastener Co. Ltd 1,685,031 -------------- Corvest Group, Inc. 3,712,360 FINANCIAL SERVICES - 2.60% G C-Sun Holdings L.P. -- BCP Caylux Holding Lux SCA 552,900 Kele and Associates, Inc. 2,322,977 Dollar Financial Group 639,000 QualServ Corporation 2,012,224 East River Ventures I, L.P. 27,300 Strategic Equipment & Supply Corporation, Inc. -- General Motors Acceptance Corporation 960,496 -------------- Highgate Capital LLC 2,723 10,158,092 Interpool, Inc. 772,500 -------------- Leucadia National Corporation 1,635,875 DIVERSIFIED/CONGLOMERATE, Mrs. Fields Brands / Finance 750,000 MANUFACTURING - 3.31% Victory Ventures LLC 2 Activant Solutions Inc 1,464,525 Williams Scotsman, Inc. 497,500 Coining of America LLC 1,927,163 -------------- Dexter Magnetics Technologies, Inc. 1,096,545 5,838,296 Douglas Dynamics LLC 617,400 -------------- Evans Consoles, Inc. 136,608 HEALTHCARE, EDUCATION Great Lakes Dredge & Dock Corp 622,500 & CHILDCARE - 4.23% Justrite Manufacturing Acquisition Co. 1,581,968 A T I Acquisition Company 2,014,237 -------------- American Hospice Management Holding LLC 2,655,422 7,446,709 Interactive Health LLC 819,000 -------------- MedAssist, Inc. 2,421,624 DIVERSIFIED/CONGLOMERATE, Quintiles Transnational Corporation 562,500 SERVICE - 7.69% Shamir Optical Industry Ltd. 50,985 Abitibi-Consolidated, Inc. 980,000 Tenet Healthcare Corporation 981,250 Allied Waste NA 997,500 -------------- CapeSuccess LLC 5,862 9,505,018 Chemed Corporation 2,753,038 -------------- Diversco, Inc./DHI Holdings, Inc. 2,088,103 HOME & OFFICE FURNISHINGS, Dwyer Group, Inc. 2,530,131 HOUSEWARES, AND DURABLE Keystone North America, Inc. 298,249 CONSUMER PRODUCTS - 3.30% Lancaster Laboratories, Inc. 1,530,147 Connor Sport Court International, Inc. 2,135,794 Moss, Inc. 1,696,369 Home Decor Holding Company 2,131,628 M S X International, Inc. 350,000 Hussey Seating Corporation 1,002,491 Service Corporation International 41,000 U-Line Corporation 2,137,299 U S M Holdings Corporation 2,165,413 -------------- Universal City Florida 411,000 7,407,212 Washington Inventory Services, Inc. 1,424,839 -------------- -------------- LEISURE, AMUSEMENT, 17,271,651 ENTERTAINMENT - 1.68% -------------- Bally Total Fitness Holding Corp 114,075 ELECTRONICS - 2.95% Keepsake Quilting, Inc. 1,542,247 A E S Corporation 220,000 M G M Mirage, Inc. 369,844 Calpine Corporation 377,500 Majestic Star Casino LLC 523,125 Directed Electronics, Inc. 2,143,425 O E D Corp/Diamond Jo Company Guarantee 942,500 Flextronics International Ltd. 397,000 Warner Music Group 283,250 N R G Energy, Inc. 579,510 -------------- Precision Dynamics, Inc. 1,605,777 3,775,041 Siebe PLC 594,750 -------------- Texas Genco LLC 706,763 -------------- 6,624,725 -------------- -------------------------------------------------------------------------------- 27 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT) MASSMUTUAL CORPORATE INVESTORS March 31, 2005 (Unaudited) Fair Value/ Fair Value/ INDUSTRY CLASSIFICATION: (CONT.) Market Value INDUSTRY CLASSIFICATION:(CONT.) Market Value -------------- -------------- MACHINERY - 11.63% RETAIL STORES - 5.47% Aearo Co. $ 474,750 Blockbuster, Inc. $ 460,750 C & M Conveyor, Inc. 2,115,055 General Nutrition Center 680,000 Integration Technology Systems, Inc. 1,592,468 IAAI Finance Corporation 794,937 Manitowoc Company, Inc. 206,000 Neff Corporation 149,600 Maxon Corporation 2,578,231 Olympic Sales, Inc. 3,701,543 N P C, Inc. 3,376,965 P H I Holding Company 2,827,360 Numatics, Inc. 500,500 Rent-A-Center, Inc. 398,000 P W Eagle, Inc. 801,990 Rent-Way, Inc. 1,647,501 Safety Speed Cut Manufacturing Company, Inc. 2,792,984 Sports Club Co. 147,750 Stanadyne Corporation 1,545,000 TVI, Inc. 414,375 Synventive Equity LLC 3,521,802 United Rentals, Inc. 1,063,750 Thermadyne Holdings Corporation 960,000 -------------- Tronair, Inc. 2,770,757 12,285,566 Tubular Textile Machinery 2,395,153 -------------- Weasler Holdings LLC 500,430 TECHNOLOGY - 0.60% -------------- Cymer, Inc. 801,125 26,132,085 Delstar Holding Corporation 441,596 -------------- Dolby Laboratories, Inc. 2,350 MEDICAL DEVICES/BIOTECH - 2.44% Magnachip Semiconductor 102,250 Bausch & Lomb, Inc. -------------- Beacon Medical Products, Inc. 2,063,691 1,347,321 Coeur, Inc. 1,179,649 -------------- E X C Acquisition Corporation 2,243,549 TELECOMMUNICATIONS - 2.31% -------------- Alamosa Delaware, Inc. 784,188 5,486,889 Cincinnati Bell, Inc. 1,083,500 -------------- Intelsat Bermuda, Ltd. 961,750 MINING, STEEL, IRON Jordan Telecom Products -- & NON PRECIOUS METALS - 0.05% MCI, Inc. 550,000 Better Minerals & Aggregates 108,991 Rogers Wireless, Inc. 461,738 -------------- Telex Communications, Inc. 848,845 OIL AND GAS - 3.08% Triton P C S, Inc. 506,000 Chesapeake Energy Corporation 334,750 -------------- Dynegy Holdings, Inc. 443,750 5,196,021 GulfMark Offshore, Inc. 581,950 -------------- Mustang Ventures Company 853,474 UTILITIES - 1.13% North American Energy Partners 360,000 Bill Barrett Corporation Offshore Logistics, Inc. 427,500 El Paso Corporation 298,500 Pacific Energy Partners 517,500 Markwest Energy 475,000 Supreme Industries, Inc. 725,580 Moog, Inc. 117,600 Transmontaigne, Inc. 2,666,608 Nalco Co. 520,000 -------------- Utilicorp United, Inc. 1,120,000 6,911,112 -------------- -------------- 2,531,100 PHARMACEUTICALS - 0.43% -------------- Enzymatic Therapy, Inc. 961,568 WASTE MANAGEMENT/ -------------- POLLUTION - 0.92% PUBLISHING/PRINTING - 2.90% Terra Renewal Services, Inc. 2,063,598 American Media Operation, Inc. 927,000 -------------- Cadmus Communications Corporation 783,750 TOTAL CORPORATE RESTRICTED Houghton Mifflin Co. 1,030,000 AND PUBLIC SECURITIES - 105.89% $ 237,914,879 Jostens I H Corporation 742,500 ============== Merrill Corporation 1,593,750 Primedia, Inc. 1,020,000 Sheridan Acquisition Corporation 398,438 -------------- 6,495,438 -------------- 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 financial reporting and federal tax purposes as of March 31, 2005 is $2,323,619 and consists of $24,785,992 appreciation and $22,462,373 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 (17 CFR 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 Corporate 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.