MassMutual Corporate Investors Report for the Three Months Ended March 31, 2007 [LOGO] ADVISER Babson Capital Management LLC 1500 Main Street, P.O. Box 15189 Springfield, Massachusetts 01115-5189 INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM KPMG LLP Boston, Massachusetts 02110 COUNSEL TO THE TRUST Ropes & Gray LLP Boston, Massachusetts 02110 CUSTODIAN Citibank, N.A. New York, New York 10043 TRANSFER AGENT & REGISTRAR Shareholder Financial Services, Inc. P.O. Box 173673 Denver, Colorado 80217-3673 1-800-647-7374 INTERNET WEBSITE www.babsoncapital.com/mci [LOGO] MassMutual Corporate Investors c/o Babson Capital Management LLC 1500 Main Street, Suite 600 Springfield, Massachusetts 01115 (413) 226-1516 -------------------------------------------------------------------------------- INVESTMENT OBJECTIVE AND POLICY MassMutual Corporate Investors (the "Trust") is a closed-end management investment company, first offered to the public in 1971, whose shares are traded on the New York Stock Exchange under the trading symbol "MCI." The Trust's share price can be found in the financial section of most newspapers as "MassCp" or "MassMulnv" under the New York Stock Exchange listings. The Trust's investment objective is to maintain a portfolio of securities providing a fixed yield while providing an opportunity for capital gains. The Trust's principal investments are privately placed, below-investment grade, long-term corporate debt obligations with equity features such as warrants, conversion rights, or other equity features and, occasionally, preferred stocks. The Trust typically purchases these investments, which are not publicly tradable, directly from their issuers, which tend to be smaller companies. In addition, the Trust may temporarily invest, subject to certain limitations, in marketable investment grade debt securities, other marketable debt securities (including high yield securities) and marketable common stocks. Babson Capital Management LLC ("Babson Capital") manages the Trust on a total return basis. The Trust distributes substantially all of its net income to shareholders each year. Accordingly, the Trust pays dividends to shareholders quarterly in January, May, August, and November. The Trust pays dividends to its shareholders in cash, unless the shareholder elects to participate in the Dividend Reinvestment and Share Purchase Plan. FORM N-Q The Trust files its complete schedule of portfolio holdings with the U.S. Securities and Exchange Commission ("SEC") for the first and third quarters of each fiscal year on Form N-Q. This information is available (i) on the SEC's website at http://www.sec.gov; and (ii) at the SEC's Public Reference Room in Washington, DC (which information on their operation may be obtained by calling 1-800-SEC-0330). A complete schedule of portfolio holdings as of each quarter-end is available upon request by calling, toll-free, 866-399-1516. PROXY VOTING POLICIES & PROCEDURES; PROXY VOTING RECORD The Trustees of the Trust have delegated proxy voting responsibilities relating to the voting of securities held by the Trust to Babson Capital. A description of Babson Capital's proxy voting policies and procedures is available (1) without charge, upon request, by calling, toll-free 866-399-1516; (2) on the Trust's website: http://www.babsoncapital.com/mci; and (3) on the SEC's website: http://www.sec.gov. Information regarding how the Trust voted proxies relating to portfolio securities during the most recent 12-month period ended June 30 is available (1) on the Trust's website: http://www.babsoncapital.com/mci; and (2) on the SEC's website: http://www.sec.gov. MCI Listed NYSE TO OUR SHAREHOLDERS April 30, 2007 We are pleased to present the March 31, 2007 Quarterly Report of MassMutual Corporate Investors (the "Trust"). At the Trust's Annual Shareholders Meeting, which was held on April 27, 2007, shareholders elected Donald E. Benson, Donald Glickman, and Robert E. Joyal as Trustees, each for a three-year term; William J. Barrett as Trustee, for a two-year term; and Michael H. Brown as Trustee, for a one-year term. The Board of Trustees declared a quarterly dividend of 52 cents per share, payable on May 18, 2007 to shareholders of record on May 7, 2007. The Trust had previously paid a 50 cent per share dividend for the preceding quarter (plus a special year-end dividend of 50 cents per share). U.S. equity markets, as measured by several broad market indices, posted mixed returns for the quarter. Large stocks, as approximated by the Dow Jones Industrial Average, decreased 0.33%. Smaller stocks, as approximated by the Russell 2000 Index, increased 1.95%. U.S. fixed income markets, as measured by several broad market indices increased during the quarter. The Lehman Brothers Government/Credit Index increased 1.47% for the quarter and the Lehman Brothers U.S. Corporate High Yield Index increased 2.64% for the quarter. During the quarter ended March 31, 2007, net assets of the Trust increased to $257,999,523 or $28.10 per share compared to $251,689,646 or $27.51 per share on December 31, 2006, which translates into a 2.14% return for the quarter, based on the change in the Trust's net assets assuming the reinvestment of all dividends. Long term, the Trust returned 14.43%, 17.14%, 14.86%, and 15.94% for the 1-, 5-, 10- and 25-year time periods, respectively, based on the change in the Trust's net assets assuming the reinvestment of all dividends. The Trust earned 53 cents per share of net investment income for the quarter, compared to 81 cents per share in the previous quarter, of which 24 cents per share was from nonrecurring items. During the quarter, the Trust made private placement investments in five new issuers totaling approximately $10 million. The five new issuers the Trust invested in were Aero Holdings, Inc., Connecticut Electric, Inc., Hawk Precision Components Group, Inc., K W P I Holdings Corporation and Total Equipment & Service, Inc. The weighted average coupon of these investments was 11.88%. (A brief description of these investments can be found in the Consolidated Schedule of Investments.) The market price per share of the Trust as of March 31, 2007 was $36.35, which equates to a 29.4% premium over the March 31, 2007 NAV per share. The Trust's average quarter-end premium for the 3, 5 and 10-year periods was 14.2%, 10.6% and 4.7%, respectively. Thank you for your continued interest in and support of MassMutual Corporate Investors. Sincerely, /s/ Clifford M. Noreen Clifford M. Noreen President [PIE CHART APPEARS HERE] Portfolio Composition as of 03/31/07* Private High Public Equity 1.0% Yield Debt 51.5% Public High Cash & Short Term Yield Debt 24.6% Investments 2.1% Private/Restricted Private Investment Equity 16.5% Grade Debt 4.3% *Based on market value of total investments -------------------------------------------------------------------------------- 1 CONSOLIDATED STATEMENT OF MASSMUTUAL CORPORATE INVESTORS ASSETS AND LIABILITIES March 31, 2007 (Unaudited) ASSETS: Investments (See Consolidated Schedule of Investments) Corporate restricted securities at fair value (Cost - $197,007,348) $ 198,234,210 Corporate public securities at market value (Cost - $67,253,983) 70,081,375 Short-term securities at amortized cost 5,185,429 -------------- 273,501,014 Cash 599,794 Interest and dividends receivable 5,814,144 Receivable for investments sold 31,684 Other assets 19,014 -------------- TOTAL ASSETS $ 279,965,650 ============== LIABILITIES: Payable for investments purchased $ 200,000 Investment advisory fee payable 806,249 Note payable 20,000,000 Interest payable 188,856 Accrued expenses 119,430 Accrued taxes payable 651,592 -------------- TOTAL LIABILITIES 21,966,127 -------------- TOTAL NET ASSETS $ 257,999,523 -------------- NET ASSETS: Common shares, par value $1.00 per share; an unlimited number authorized 9,181,437 Additional paid-in capital 109,231,705 Retained net realized gain on investments, prior years 126,906,684 Undistributed net investment income 6,627,901 Accumulated net realized gain on investments 2,429,086 Net unrealized appreciation of investments 3,622,710 -------------- TOTAL NET ASSETS $ 257,999,523 ============== COMMON SHARES ISSUED AND OUTSTANDING 9,181,437 ============== NET ASSET VALUE PER SHARE $ 28.10 ============== SEE NOTES TO CONSOLIDATED FINANCIAL STATEMENTS. ------------------------------------------------------------------------------------------- 2 CONSOLIDATED STATEMENT OF OPERATIONS MASSMUTUAL CORPORATE INVESTORS For the three months ended March 31, 2007 (Unaudited) INVESTMENT INCOME: Interest $ 6,086,759 Dividends 139,007 Other 2,683 -------------- TOTAL INVESTMENT INCOME 6,228,449 -------------- EXPENSES: Investment advisory fees 806,249 Interest 378,747 Trustees' fees and expenses 45,000 Professional fees 31,500 Reports to shareholders 27,000 Transfer agent/registrar's expenses 9,000 Other 101,954 -------------- TOTAL EXPENSES 1,399,450 -------------- INVESTMENT INCOME - NET 4,828,999 -------------- NET REALIZED AND UNREALIZED GAIN (LOSS) ON INVESTMENTS: Net realized gain on investments 2,337,748 Net change in unrealized appreciation of investments (2,130,297) Net change in deferred income tax expense 219,474 -------------- Net change in unrealized appreciation of investments (1,910,823) NET GAIN ON INVESTMENTS 426,925 -------------- NET INCREASE IN NET ASSETS RESULTING FROM OPERATIONS $ 5,255,924 ============== SEE NOTES TO CONSOLIDATED FINANCIAL STATEMENTS. ------------------------------------------------------------------------------------------- 3 CONSOLIDATED STATEMENT OF CASH FLOWS MASSMUTUAL CORPORATE INVESTORS For the three months ended March 31, 2007 (Unaudited) NET DECREASE IN CASH: Cash flows from operating activities: Interest, dividends, and other received $ 6,220,977 Interest expense paid (378,747) Operating expenses paid (1,028,520) Income taxes paid (6,315,954) -------------- NET CASH USED FOR OPERATING ACTIVITIES (1,502,244) -------------- Cash flows from investing activities: Purchases/Proceeds/Maturities from short-term portfolio securities, net 2,078,948 Purchase of portfolio securities (25,838,258) Proceeds from disposition of portfolio securities 28,772,846 -------------- NET CASH PROVIDED BY INVESTING ACTIVITIES 5,013,536 -------------- NET CASH PROVIDED BY OPERATING AND INVESTING ACTIVITIES 3,511,292 -------------- Cash flows from financing activities: Cash dividends paid from net investment income (7,703,279) Cash dividends paid from net realized gain on investments (1,446,640) Receipts for shares issued on reinvestment of dividends 1,053,953 -------------- NET CASH USED FOR FINANCING ACTIVITIES (8,095,966) -------------- NET DECREASE IN CASH (4,584,674) Cash - beginning of year 5,184,468 -------------- CASH - END OF PERIOD $ 599,794 ============== RECONCILIATION OF NET INCREASE IN NET ASSETS TO NET CASH PROVIDED BY OPERATING AND INVESTING ACTIVITIES: NET INCREASE IN NET ASSETS RESULTING FROM OPERATIONS $ 5,255,924 -------------- Decrease in investments 3,846,938 Decrease in interest and dividends receivable 320,521 Decrease in receivable for investments sold 469,179 Increase in other assets (19,014) Increase in payable for investments purchased 200,000 Increase in investment advisory fee payable 19,719 Decrease in accrued expenses (46,547) Decrease in accrued taxes payable (6,535,428) -------------- TOTAL ADJUSTMENTS TO NET ASSETS FROM OPERATIONS (1,744,632) -------------- NET CASH PROVIDED BY OPERATING AND INVESTING ACTIVITIES $ 3,511,292 ============== SEE NOTES TO CONSOLIDATED FINANCIAL STATEMENTS. ------------------------------------------------------------------------------------------- 4 CONSOLIDATED STATEMENTS OF MASSMUTUAL CORPORATE INVESTORS CHANGES IN NET ASSETS For the three months ended For the 03/31/2007 year ended (Unaudited) 12/31/2006 -------------- -------------- INCREASE IN NET ASSETS: OPERATIONS: Investment income - net $ 4,828,999 $ 20,681,143 Net realized gain on investments 2,337,748 12,301,691 Net change in unrealized appreciation of investments (1,910,823) 2,456,052 -------------- -------------- Net increase in net assets resulting from operations 5,255,924 35,438,886 Increase from common shares issued on reinvestment of dividends Common shares issued (2007 - 31,518; 2006 - 84,966) 1,053,953 2,619,000 Dividends to shareholders from: Net investment income (2006 - $2.47 per share) -- (22,518,167) Net realized gains on investments (2006 - $0.01 per share) -- (125,491) -------------- -------------- Total increase in net assets 6,309,877 15,414,228 Net assets, beginning of year 251,689,646 236,275,418 -------------- -------------- Net assets, end of period/year (including undistributed net investment income of $6,627,901 and $1,798,902, respectively) $ 257,999,523 $ 251,689,646 ============== ============== SEE NOTES TO CONSOLIDATED FINANCIAL STATEMENTS. --------------------------------------------------------------------------------------------------------------- 5 CONSOLIDATED SELECTED FINANCIAL HIGHLIGHTS MASSMUTUAL CORPORATE INVESTORS Selected data for each common share outstanding: For the three months ended For the years ended December 31, 03/31/2007 ---------------------------------------------------------------------- (Unaudited) 2006 2005 2004 2003 2002 ---------- ---------- ---------- ---------- ---------- ---------- Net asset value Beginning of year $ 27.51 $ 26.06 $ 24.34 $ 21.84 $ 19.40 $ 20.07 ---------- ---------- ---------- ---------- ---------- ---------- Net investment income (a) 0.53 2.27 2.03 2.00 1.44 1.53 Net realized and unrealized gain (loss) on investments 0.05 1.62 1.96(b) 2.64 2.83 (0.59) ---------- ---------- ---------- ---------- ---------- ---------- Total from investment operations 0.58 3.89 3.99 4.64 4.27 0.94 ---------- ---------- ---------- ---------- ---------- ---------- Dividends from net investment income to common shareholders -- (2.47) (2.11) (2.16) (1.84) (1.44) Dividends from net realized gain on investments to common shareholders -- (0.01) (0.18) -- -- (0.18) Increase from dividends reinvested 0.01 0.04 0.02 0.02 0.01 0.01 ---------- ---------- ---------- ---------- ---------- ---------- Total dividends 0.01 (2.44) (2.27) (2.14) (1.83) (1.61) ---------- ---------- ---------- ---------- ---------- ---------- Net asset value: End of period/year $ 28.10 $ 27.51 $ 26.06 $ 24.34 $ 21.84 $ 19.40 ---------- ---------- ---------- ---------- ---------- ---------- Per share market value: End of period/year $ 36.35 $ 34.89 $ 30.05 $ 28.50 $ 22.90 $ 19.49 ========== ========== ========== ========== ========== ========== Total investment return Market value 4.18% 29.04% 16.95% 36.10% 27.53% 1.35% Net asset value (c) 2.14% 18.09% 20.04% 22.76% 22.61% 4.80% Net assets (in millions): End of period/year $ 258.00 $ 251.69 $ 236.28 $ 218.51 $ 193.79 $ 171.03 Ratio of operating expenses to average net assets 1.62%(d) 1.43% 1.78% 1.93% 2.04% 1.82% Ratio of interest expense to average net assets 0.60%(d) 0.60% 0.73% 0.77% 0.82% 0.86% Ratio of total expenses before custodian reduction to average net assets 2.22%(d) 2.07% 2.52% 2.70% 2.86% 2.68% Ratio of net expenses after custodian reduction to average net assets 2.22%(d) 2.03% 2.51% 2.70% 2.86% 2.68% Ratio of net investment income to average net assets 7.66%(d) 8.19% 7.98% 8.68% 6.95% 7.65% Portfolio turnover 9.69% 34.70% 35.22% 53.45% 56.10% 34.02% (a) Calculated using average shares. (b) Amount includes $0.19 per share in litigation proceeds. (c) Net asset value return represents portfolio returns based on change in the Trust's net asset value assuming the reinvestment of all dividends and distributions which differs from the total investment return based on the Trust's market value due to the difference between the Trust's net asset value and the market value of its shares outstanding; past performance is no guarantee of future results. (d) Annualized. Senior securities: Total principal amount (in millions) $ 20 $ 20 $ 20 $ 29 $ 20 $ 20 Asset coverage per $1,000 of indebtedness $ 13,900 $ 13,584 $ 12,814 $ 8,535 $ 10,689 $ 9,551 SEE NOTES TO CONSOLIDATED FINANCIAL STATEMENTS. ----------------------------------------------------------------------------------------------------------------------------------- 6 ITEM 1. SCHEDULE OF INVESTMENTS. CONSOLIDATED SCHEDULE OF INVESTMENTS MASSMUTUAL CORPORATE INVESTORS March 31, 2007 (Unaudited) Shares, Units, Warrants, Ownership or Acquisition CORPORATE RESTRICTED SECURITIES - 76.84%:(A) Principal Amount Date Cost Fair Value -------------- -------- ------------ ------------ PRIVATE PLACEMENT INVESTMENTS - 70.31% 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 $ 2,076,421 Warrant, exercisable until 2012, to purchase common stock at $.02 per share (B) 2,323 shs. 04/08/04 -- 23 Warrant, exercisable until 2012, to purchase preferred stock at $.01 per share (B) 63,287 shs. 03/23/06 63,958 63,958 ------------ ------------ 2,188,958 2,140,402 ------------ ------------ ADORN, INC. A manufacturer of wall panels, cabinets, moldings and countertops for houses and recreational vehicles. 12.5% Subordinated Note due 2012 $ 1,465,517 02/29/00 1,394,356 1,465,517 Warrant, exercisable until 2012, to purchase common stock at $.02 per share (B) 364 shs. 02/29/00 307,759 475,000 ------------ ------------ 1,702,115 1,940,517 ------------ ------------ AERO HOLDINGS, INC. A provider of geospatial services to corporate and government clients. 10.5% Senior Secured Term Note due 2014 $ 1,627,500 03/09/07 1,603,088 1,595,464 14% Senior Subordinated Note due 2015 $ 1,260,000 03/09/07 1,123,273 1,232,984 Common Stock (B) 262,500 shs. 03/09/07 262,500 249,375 Warrant, exercisable until 2015, to purchase common stock at $.01 per share (B) 66,116 shs. 03/09/07 111,527 661 ------------ ------------ 3,100,388 3,078,484 ------------ ------------ AMERCABLE, INC. A manufacturer of electric power, instrumentation and control cables, primarily for the mining and oil and gas industries. 12% Senior Subordinated Note due 2013 $ 1,101,852 04/08/05 1,046,368 1,123,889 Limited Partnership Interest (B) 0.36% int. 04/07/05 78,704 207,639 Warrant, exercisable until 2013, to purchase common stock at $.01 per share (B) 125 shs. 04/08/05 122,463 329,425 ------------ ------------ 1,247,535 1,660,953 ------------ ------------ 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 1,952,119 2,127,513 Preferred Class A Unit (B) 3,223 uts. * 322,300 354,530 Common Class B Unit (B) 30,420 uts. 01/22/04 1 61,359 Common Class D Unit (B) 6,980 uts. 09/12/06 1 14,079 ------------ ------------ 2,274,421 2,557,481 ------------ ------------ ARROW TRU-LINE HOLDINGS, INC. A manufacturer of hardware for residential and commercial overhead garage doors in North America. 12% Senior Subordinated Note due 2012 $ 1,627,660 05/18/05 1,536,068 1,660,213 Common Stock (B) 497 shs. 05/18/05 497,340 427,058 Warrant, exercisable until 2012, to purchase common stock at $.01 per share (B) 130 shs. 05/18/05 112,128 111,955 ------------ ------------ 2,145,536 2,199,226 ------------ ------------ *01/22/04 and 09/12/06. ---------------------------------------------------------------------------------------------------------------------------------- 7 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL CORPORATE INVESTORS March 31, 2007 (Unaudited) Shares, Units, Warrants, Ownership or Acquisition CORPORATE RESTRICTED SECURITIES:(A)(Continued) Principal Amount Date Cost Fair Value -------------- -------- ------------ ------------ AUGUSTA SPORTSWEAR HOLDING CO. A manufacturer and distributor of athletic apparel, activewear and team uniforms. 12% Senior Subordinated Note due 2012 $ 1,686,800 12/31/04 $ 1,589,264 $ 1,737,404 Common Stock (B) 520 shs. * 519,622 1,092,637 Warrant, exercisable until 2012, to purchase common stock at $.01 per share (B) 137 shs. 12/31/04 119,482 289,103 ------------ ------------ 2,228,368 3,119,144 ------------ ------------ 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 -- ------------ ------------ BRAVO SPORTS HOLDING CORPORATION A designer and marketer of niche branded consumer products including canopies, trampolines, in-line skates, skateboards, and urethane wheels. 12.5% Senior Subordinated Note due 2014 $ 2,281,593 06/30/06 2,148,945 2,170,111 Preferred Stock Class A (B) 879 shs. 06/30/06 268,121 241,307 Common Stock (B) 1 sh. 06/30/06 286 258 Warrant, exercisable until 2014, to purchase common stock at $.01 per share (B) 309 shs. 06/30/06 92,102 3 ------------ ------------ 2,509,454 2,411,679 ------------ ------------ CAINS FOODS, L.P. A producer of mayonnaise and sauce products for both the retail and food service markets. Limited Partnership Interest (B) 3.69 % int. 09/29/95 45,046 308,863 ------------ ------------ CAPESUCCESS LLC A provider of diversified staffing services. Preferred Membership Interests (B) 1,882 uts. 04/29/00 8,395 420 Common Membership Interests (B) 24,318 uts. 04/29/00 108,983 5,442 ------------ ------------ 117,378 5,862 ------------ ------------ CAPITAL SPECIALTY PLASTICS, INC. A producer of desiccant strips used for packaging pharmaceutical products. Common Stock (B) 109 shs. ** 503 447,145 ------------ ------------ COEUR, INC. A producer of proprietary, disposable power injection syringes. 8.75% Senior Secured Term Note due 2010 $ 462,862 04/30/03 462,862 469,478 11.5% Senior Subordinated Note due 2011 $ 424,819 04/30/03 398,694 428,359 Common Stock (B) 126,812 shs. 04/30/03 126,812 320,313 Warrant, exercisable until 2010, to purchase common stock at $.01 per share (B) 87,672 shs. 04/30/03 40,804 221,450 ------------ ------------ 1,029,172 1,439,600 ------------ ------------ *12/31/04, 03/31/05, and 05/02/06. **12/30/97 and 05/29/99. ---------------------------------------------------------------------------------------------------------------------------------- 8 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL CORPORATE INVESTORS March 31, 2007 (Unaudited) Shares, Units, Warrants, Ownership or Acquisition CORPORATE RESTRICTED SECURITIES:(A)(Continued) Principal Amount Date Cost Fair Value -------------- -------- ------------ ------------ COINING CORPORATION OF AMERICA LLC A manufacturer of close tolerance parts and metal stampings. 10.6% Senior Secured Revolving Credit Facility due 2007 (C) $ 21,605 01/07/02 $ 21,605 $ 21,551 10.6% Senior Secured Tranche A Note due 2007 (C) $ 651,862 06/26/01 651,862 649,395 13% Senior Secured Tranche B Note due 2008 $ 648,148 06/26/01 648,148 648,148 Limited Partnership Interest (B) 6.38% int. 06/26/01 324,074 1,019,138 Warrant, exercisable until 2008, to purchase common stock at $.01 per share (B) 107,036 shs. 06/26/01 79,398 336,603 ------------ ------------ 1,725,087 2,674,835 ------------ ------------ CONNECTICUT ELECTRIC, INC. A supplier and distributor of electrical products sold into the retail and wholesale markets. 12% Senior Subordinated Note due 2014 $ 2,393,954 01/12/07 2,233,202 2,362,194 Limited Liability Company Unit Class A (B) 156,046 uts. 01/12/07 156,046 148,244 Limited Liability Company Unit Class C (B) 112,873 uts. 01/12/07 112,873 107,230 ------------ ------------ 2,502,121 2,617,668 ------------ ------------ CONNOR SPORT COURT INTERNATIONAL, INC. A designer and manufacturer of outdoor and indoor synthetic sports flooring and other temporary flooring products. 12% Senior Subordinated Note due 2012 (D) $ 2,001,121 * 1,840,888 1,000,561 Limited Partnership Interest (B) 7.74% int. ** 189,586 -- Warrant, exercisable until 2012, to purchase common stock at $.01 per share (B) 174 shs. * 160,233 -- ------------ ------------ 2,190,707 1,000,561 ------------ ------------ CONSOLIDATED FOUNDRIES HOLDINGS A manufacturer of engineered cast metal components for the global aerospace and defense industries. 12% Senior Subordinated Note due 2013 $ 2,185,714 06/15/05 2,099,658 2,224,630 Common Stock (B) 509 shs. *** 526,096 661,433 Warrant, exercisable until 2013, to purchase common stock at $.01 per share (B) 103 shs. 06/15/05 100,668 133,779 ------------ ------------ 2,726,422 3,019,842 ------------ ------------ COREPHARMA LLC A manufacturer of oral dose generic pharmaceuticals targeted at niche applications. 12% Senior Subordinated Note due 2013 $ 2,550,000 08/04/05 2,429,170 2,575,500 Warrant, exercisable until 2013, to purchase common stock at $.01 per share (B) 20 shs. 08/04/05 137,166 69,742 ------------ ------------ 2,566,336 2,645,242 ------------ ------------ DAVIS-STANDARD LLC A manufacturer, assembler, and installer of a broad range of capital equipment that is used in the extrusion, conversion, and processing of plastic materials. 12% Senior Subordinated Note due 2014 $ 1,847,826 10/30/06 1,729,693 1,862,362 Limited Partnership Interest (B) 702,174 uts. 10/30/06 702,174 667,065 Warrant, exercisable until 2014, to purchase preferred stock at $.01 per share (B) 50 shs. 10/30/06 49,830 1 Warrant, exercisable until 2014, to purchase common stock at $.01 per share (B) 34 shs. 10/30/06 34,000 -- ------------ ------------ 2,515,697 2,529,428 ------------ ------------ *08/12/04 and 01/18/05. **08/12/04 and 01/14/05. ***06/15/05 and 05/22/06. ---------------------------------------------------------------------------------------------------------------------------------- 9 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL CORPORATE INVESTORS March 31, 2007 (Unaudited) Shares, Units, Warrants, Ownership or Acquisition CORPORATE RESTRICTED SECURITIES:(A)(Continued) Principal Amount Date Cost Fair Value -------------- -------- ------------ ------------ DELTACOM, INC. A provider of integrated communications services in the southeastern United States. 13.88% Senior Secured Note due 2009 (C) $ 2,248,927 07/26/05 $ 2,204,516 $ 2,308,906 17.38% Senior Secured Note due 2009 (C) $ 368,300 07/26/05 325,217 366,459 Warrant, exercisable until 2009, to purchase convertible preferred stock at $.03 per share (B) 102,884 shs. 07/26/05 34,295 284,989 ------------ ------------ 2,564,028 2,960,354 ------------ ------------ DEXTER MAGNETICS TECHNOLOGIES, INC. A designer, fabricator, assembler and distributor of industrial magnets and subassemblies in North America and Europe. Common Stock (B) 585 shs. 07/19/01 351,088 948,661 Warrant, exercisable until 2007, to purchase common stock at $.01 per share 297 shs. 07/19/01 131,981 480,823 ------------ ------------ 483,069 1,429,484 ------------ ------------ DIRECTED ELECTRONICS, INC A designer and distributor of brand name automotive security systems, audio products and installation accessories Common Stock (B) 368,560 shs. * 1,856,534 3,087,661 Limited Partnership Interest (B) 8.70% int. ** 1 278,129 ------------ ------------ 1,856,535 3,365,790 ------------ ------------ 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 -- Warrants, exercisable until 2011, to purchase common stock of DHI Holdings, Inc. at $.01 per share (B) 13,003 shs. *** 403,427 -- ------------ ------------ 3,921,650 -- ------------ ------------ DUNCAN SYSTEMS, INC. A distributor of windshields and side glass for the recreational vehicle market. 10% Senior Secured Term Note due 2013 $ 540,000 11/01/06 531,900 529,561 13% Senior Subordinated Note due 2014 $ 855,000 11/01/06 761,961 835,877 Common Stock (B) 180,000 shs. 11/01/06 180,000 171,000 Warrant, exercisable until 2014, to purchase common stock at $.01 per share (B) 56,514 shs. 11/01/06 78,160 565 ------------ ------------ 1,552,021 1,537,003 ------------ ------------ DWYER GROUP, INC. A franchiser of a variety of home repair services. Common Stock (B) 6,906 shs. **** 690,600 886,136 Warrant, exercisable until 2011, to purchase common stock at $.01 per share (B) 2,034 shs. 10/30/03 186,469 260,938 ------------ ------------ 877,069 1,147,074 ------------ ------------ *12/19/05 and 06/17/06. **12/22/99 and 09/14/05. ***10/24/96 and 08/28/98. ****10/30/03 and 01/02/04. ---------------------------------------------------------------------------------------------------------------------------------- 10 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL CORPORATE INVESTORS March 31, 2007 (Unaudited) Shares, Units, Warrants, Ownership or Acquisition CORPORATE RESTRICTED SECURITIES:(A)(Continued) Principal Amount Date Cost Fair Value -------------- -------- ------------ ------------ E X C ACQUISITION CORPORATION A manufacturer of pre-filled syringes and pump systems used for intravenous drug delivery. Warrant, exercisable until 2014, to purchase common stock at $.01 per share (B) 22 shs. 06/28/04 $ 77,208 $ 154,550 ------------ ------------ EAGLE PACK PET FOODS, INC. A manufacturer of premium pet food sold through independent pet stores. 12% Senior Subordinated Note due 2011 $ 1,517,857 * 1,480,781 1,533,036 Warrant, exercisable until 2011, to purchase common stock at $.02 per share (B) 4,085 shs. 09/24/04 39,464 90,401 ------------ ------------ 1,520,245 1,623,437 ------------ ------------ ENZYMATIC THERAPY, INC. A manufacturer and distributor of branded natural medicines and nutritional supplements. Limited Partnership Interest (B) 1.32% int. 03/30/00 531,250 63,750 Warrant, exercisable until 2009, to purchase common stock at $.01 per share (B) 29,117 shs. 03/30/00 255,000 42,500 ------------ ------------ 786,250 106,250 ------------ ------------ EVANS CONSOLES, INC. A designer and manufacturer of consoles and control center systems. Common Stock 90,000 shs. 05/06/04 6 -- ------------ ------------ F H S HOLDINGS LLC A national provider of customized disease management services to large self-insured employers. 12% Senior Subordinated Note due 2014 $ 2,390,625 06/01/06 2,228,501 2,423,218 Preferred Unit (B) 158 uts. 06/01/06 157,780 142,002 Common Unit (B) 1,594 uts. 06/01/06 1,594 1,434 Common Unit Class B (B) 1,386 uts. 06/01/06 122,361 110,125 ------------ ------------ 2,510,236 2,676,779 ------------ ------------ FLUTES, INC. An independent manufacturer of micro fluted corrugated sheet material for the food and consumer products packaging industries. 10% Senior Secured Term Note due 2013 $ 918,385 04/13/06 904,609 923,309 14% Senior Subordinated Note due 2014 $ 555,059 04/13/06 498,870 558,729 Common Stock (B) 109,436 shs. 04/13/06 109,436 98,492 Warrant, exercisable until 2014, to purchase common stock at $.01 per share (B) 30,940 shs. 04/13/06 48,433 309 ------------ ------------ 1,561,348 1,580,839 ------------ ------------ FOWLER HOLDING, INC. A provider of site development services to residential homebuilders and developers in the Raleigh/Durham region of North Carolina. 12% Senior Subordinated Note due 2013 $ 2,365,217 02/03/06 2,143,271 2,332,416 Common Stock (B) 185 shs. 02/03/06 184,783 97,140 Warrant, exercisable until 2013, to purchase common stock at $.01 per share (B) 254 shs. 02/03/06 208,435 133,624 ------------ ------------ 2,536,489 2,563,180 ------------ ------------ *09/24/04 and 4/20/06. ---------------------------------------------------------------------------------------------------------------------------------- 11 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL CORPORATE INVESTORS March 31, 2007 (Unaudited) Shares, Units, Warrants, Ownership or Acquisition CORPORATE RESTRICTED SECURITIES:(A)(Continued) Principal Amount Date Cost Fair Value -------------- -------- ------------ ------------ FUEL SYSTEMS HOLDING CORPORATION An independent North American supplier of fuel tanks for a wide variety of commercial vehicles. 12% Senior Subordinated Note due 2014 $ 2,337,500 01/31/06 $ 2,181,882 $ 2,372,076 Common Stock (B) 212,500 shs. 01/31/06 212,500 368,145 Warrant, exercisable until 2016, to purchase common stock at $.01 per share (B) 138,408 shs. 01/31/06 119,213 239,785 ------------ ------------ 2,513,595 2,980,006 ------------ ------------ H M HOLDING COMPANY A designer, manufacturer, and importer of promotional and wood furniture. 12% Senior Subordinated Note due 2013 $ 2,210,000 02/10/06 2,058,324 2,046,902 Common Stock (B) 340 shs. 02/10/06 340,000 272,000 Warrant, exercisable until 2013, to purchase common stock at $.01 per share (B) 126 shs. 02/10/06 116,875 1 ------------ ------------ 2,515,199 2,318,903 ------------ ------------ HAWK PRECISION COMPONENTS GROUP, INC. A manufacturer of powder metal and metal injection molded precision components used in industrial, consumer, and other applications. 12% Senior Subordinated Note due 2014 $ 1,530,000 02/02/07 1,408,570 1,492,105 Limited Partnership Interest of Saw Mill PCG Partners LLC (B) 1,020 uts. 02/02/07 1,020,000 969,000 Warrant, exercisable until 2014, to purchase common stock at $.01 per share (B) 91 shs. 02/02/07 90,830 1 ------------ ------------ 2,519,400 2,461,106 ------------ ------------ HIGHGATE CAPITAL LLC An acquirer of controlling or substantial interests in manufacturing and marketing entities. Series A Preferred Units (B) 1.19% int. 07/21/94 367,440 -- ------------ ------------ 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 * 1,881,047 2,064,198 Common Stock (B) 63 shs. * 62,742 86,673 Warrant, exercisable until 2012, to purchase common stock at $.02 per share (B) 200 shs. * 199,501 275,600 ------------ ------------ 2,143,290 2,426,471 ------------ ------------ INTEGRATION TECHNOLOGY SYSTEMS, INC. A manufacturer of steel protective computer and network systems for the industrial and office environments 12% Senior Secured Note due 2008 $ 1,644,444 03/01/04 1,646,101 1,248,333 Common Stock (B) 228 shs. 06/01/00 262,200 -- ------------ ------------ 1,908,301 1,248,333 ------------ ------------ JASON, INC. A diversified manufacturing company serving various industrial markets. 13% Senior Subordinated Note due 2008 $ 963,687 08/04/00 928,972 954,050 14% Cumulative Redeemable Preferred Stock Series A (B) 289 shs. 08/04/00 289,224 280,542 Limited Partnership Interest of Saw Mill Capital Fund II, L.P. (B) 2.50% int. 08/03/00 886,352 454,477 Warrants, exercisable until 2008 and 2009, to purchase common stock at $.01 per share (B) 50,870 shs. 08/04/00 115,412 91,271 ------------ ------------ 2,219,960 1,780,340 ------------ ------------ *06/30/04 and 08/19/04. ---------------------------------------------------------------------------------------------------------------------------------- 12 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL CORPORATE INVESTORS March 31, 2007 (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 $ 1,514,582 $ 1,609,688 Warrant, exercisable until 2011, to purchase common stock at $.01 per share (B) 1,121 shs. 12/15/04 101,109 117,511 ------------ ------------ 1,615,691 1,727,199 ------------ ------------ K N B HOLDINGS CORPORATION A designer, manufacturer and marketer of products for the custom framing market. 13.5% Senior Subordinated Note due 2013 $ 2,437,593 05/25/06 2,323,115 2,428,636 Common Stock (B) 134,210 shs. 05/25/06 134,210 120,789 Warrant, exercisable until 2013, to purchase common stock at $.01 per share (B) 82,357 shs. 05/25/06 71,534 824 ------------ ------------ 2,528,859 2,550,249 ------------ ------------ K W P I HOLDINGS CORPORATION A manufacturer and distributor of vinyl windows and patio doors throughout the northwestern United States. 12% Senior Subordinated Note due 2014 $ 2,318,000 03/14/07 2,109,380 2,286,102 Common Stock (B) 232 shs. 03/13/07 232,000 220,400 Warrant, excercisable until 2017, to purchase common stock at $.01 per share (B) 167 shs. 03/14/07 162,260 2 ------------ ------------ 2,503,640 2,506,504 ------------ ------------ KEEPSAKE QUILTING, INC. A seller of quilting fabrics, books, patterns, kits and notions to consumers. 8.35% Senior Secured Revolving Note due 2007 (C) $ 146,771 06/16/00 146,771 147,756 8.35% Senior Secured Tranche A Note due 2007 (C) $ 68,799 07/19/00 68,799 68,674 12% Senior Secured Tranche B Note due 2008 $ 550,392 06/16/00 540,246 553,155 Limited Partnership Interest of Riverside XVI Holding Company, L.P. (B) 5.29% int. 06/12/00 333,490 520,633 Warrant, exercisable until 2008, to purchase common stock at $.01 per share (B) 1,108 shs. 06/12/00 45,866 174,526 ------------ ------------ 1,135,172 1,464,744 ------------ ------------ KELE AND ASSOCIATES, INC. A distributor of building automation control products. 12% Senior Subordinated Note due 2012 $ 1,831,548 02/27/04 1,700,485 1,849,863 Preferred Stock (B) 23 shs. 11/24/04 449,164 456,950 Common Stock (B) 12 shs. 02/27/04 12,871 294,732 Warrant, exercisable until 2012, to purchase common stock at $.02 per share (B) 11 shs. 02/27/04 7,793 269,767 ------------ ------------ 2,170,313 2,871,312 ------------ ------------ LIH INVESTORS, L.P. A manufacturer and marketer of a broad line of external accessories for new and used sport utility vehicles, trucks and vans. 12.5% Senior Subordinated Note due 2008 (D) $ 3,845,000 * 3,587,623 1,922,500 Common Stock (B) 5,800 shs. * 406,003 -- Warrant, exercisable until 2008, to purchase common stock at $.11 per share (B) 15,572 shs. * 602,127 -- ------------ ------------ 4,595,753 1,922,500 ------------ ------------ *12/23/98 and 01/28/99. ---------------------------------------------------------------------------------------------------------------------------------- 13 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL CORPORATE INVESTORS March 31, 2007 (Unaudited) Shares, Units, Warrants, Ownership or Acquisition CORPORATE RESTRICTED SECURITIES:(A)(Continued) Principal Amount Date Cost Fair Value -------------- -------- ------------ ------------ MAGNATECH INTERNATIONAL, INC. A supplier of process equipment and related parts used in the manufacturing of medium and high-pressure reinforced hoses. 12% Senior Subordinated Note due 2014 $ 1,275,000 04/05/06 $ 1,188,501 $ 1,299,619 13% Preferred Stock (B) 565 shs. 04/05/06 565,335 537,064 Common Stock (B) 125 shs. 04/05/06 125,048 118,798 Warrant, exercisable until 2014, to purchase common stock at $.01 per share (B) 13 shs. 04/05/06 12,905 -- ------------ ------------ 1,891,789 1,955,481 ------------ ------------ MAVERICK ACQUISITION COMPANY A manufacturer of capsules that cover the cork and neck of wine bottles. 9.85% Senior Secured Tranche A Note due 2010 (C) $ 637,169 09/03/04 637,169 640,023 12% Senior Secured Tranche B Note due 2011 $ 313,433 09/03/04 283,851 314,716 Limited Partnership Interest (B) 7.84% int. 09/03/04 58,769 57,753 Warrant, exercisable until 2011, to purchase common stock at $.01 per share (B) 425 shs. 09/03/04 39,473 41,728 ------------ ------------ 1,019,262 1,054,220 ------------ ------------ MAXON CORPORATION A manufacturer of industrial combustion equipment and related shut-off valves and control valves. 12% Senior Subordinated Note due 2012 $ 962,215 09/30/04 891,095 988,528 8.75% Senior Subordinated Note due 2012 $ 1,155,562 09/30/04 1,155,562 1,188,297 Common Stock (B) 381,672 shs. 09/30/04 381,672 1,151,850 Warrant, exercisable until 2012, to purchase common stock at $.01 per share (B) 153,572 shs. 09/30/04 90,897 463,465 ------------ ------------ 2,519,226 3,792,140 ------------ ------------ MEDASSIST, INC. A provider of patient eligibility and accounts receivable management services to hospitals and physician practices. 8% Preferred Stock (B) 84 shs. 10/28/04 83,658 84,175 Common Stock (B) 26,185 shs. 10/28/04 35,088 94,509 Warrant, exercisable until 2013, to purchase common stock at $.01 per share (B) 84,637 shs. 05/01/03 40,675 305,480 ------------ ------------ 159,421 484,164 ------------ ------------ MICROGROUP, INC. A manufacturer of precision parts and assemblies, and a value-added supplier of metal tubing and bars. 12% Senior Subordinated Note due 2013 $ 2,685,614 * 2,530,108 2,730,098 Common Stock (B) 450 shs. * 450,000 403,653 Warrant, exercisable until 2013, to purchase common stock at $.02 per share (B) 164 shs. * 162,974 147,091 ------------ ------------ 3,143,082 3,280,842 ------------ ------------ MOMENTUM HOLDING CO. A designer and supplier of upholstery fabric to commercial furniture manufacturers and architectural and design firms. 12% Senior Subordinated Note due 2014 $ 1,168,847 08/04/06 1,043,164 1,181,820 Limited Partnership Interest (B) 106,153 uts. 08/04/06 106,153 95,538 Warrant, exercisable until 2014, to purchase common stock at $.01 per share (B) 1,107 shs. 08/04/06 107,109 11 ------------ ------------ 1,256,426 1,277,369 ------------ ------------ *08/12/05 and 09/11/06. ---------------------------------------------------------------------------------------------------------------------------------- 14 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL CORPORATE INVESTORS March 31, 2007 (Unaudited) Shares, Units, Warrants, Ownership or Acquisition CORPORATE RESTRICTED SECURITIES:(A)(Continued) Principal Amount Date Cost Fair Value -------------- -------- ------------ ------------ MONESSEN HOLDING CORPORATION A designer and manufacturer of a broad line of gas, wood, and electric hearth products and accessories. 12% Senior Subordinated Note due 2014 $ 2,550,000 03/31/06 $ 2,370,551 $ 2,425,011 Warrant, exercisable until 2014, to purchase common stock at $.01 per share (B) 152 shs. 03/31/06 138,125 2 ------------ ------------ 2,508,676 2,425,013 ------------ ------------ MORTON INDUSTRIAL GROUP, INC. A manufacturer of highly engineered metal fabricated components. 12% Senior Subordinated Note due 2014 $ 2,440,909 08/25/06 2,248,221 2,446,847 Common Stock (B) 109,091 shs. 08/25/06 109,091 98,182 Warrant, exercisable until 2014, to purchase common stock at $.01 per share (B) 173,633 shs. 08/25/06 149,940 1,736 ------------ ------------ 2,507,252 2,546,765 ------------ ------------ MOSS, INC. A manufacturer and distributor of large display and exhibit structures. Limited Partnership Interest of Riverside Capital Appreciation Fund I, L.P. (B) 33.59% int. * 348,620 412,344 Warrant, exercisable until 2010, to purchase common stock at $.01 per share (B) 214 shs. 12/21/05 36,647 25,315 ------------ ------------ 385,267 437,659 ------------ ------------ NABCO, INC. A producer of explosive containment vessels in the United States. 12% Senior Subordinated Note due 2014 $ 625,000 02/24/06 578,353 583,750 Limited Liability Company Unit (B) 650 uts. 02/24/06 650,000 585,000 Warrant, exercisable until 2016, to purchase common stock at $.01 per share (B) 48 shs. 02/24/06 37,188 -- ------------ ------------ 1,265,541 1,168,750 ------------ ------------ NAVIS GLOBAL 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 1,129,246 1,223,438 8.75% Senior Secured Note due 2011 $ 716,292 05/28/04 716,292 715,287 Common Stock (B) 674,157 shs. 05/28/04 674,157 573,033 Warrant, exercisable until 2012, to purchase common stock at $.01 per share (B) 203,912 shs. 05/28/04 130,789 2,039 ------------ ------------ 2,650,484 2,513,797 ------------ ------------ 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 1,890,504 10% Preferred Stock (B) 255 shs. 03/29/04 255,083 258,458 Common Stock (B) 6,455 shs. 03/29/04 6,455 156,148 Warrant, exercisable until 2012, to purchase common stock at $.01 per share (B) 8,622 shs. 03/29/04 7,323 208,572 ------------ ------------ 2,125,000 2,513,682 ------------ ------------ *09/20/00, 05/23/02, and 02/21/07. ---------------------------------------------------------------------------------------------------------------------------------- 15 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL CORPORATE INVESTORS March 31, 2007 (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 $ 812,500 01/28/02 $ 812,500 $ 771,875 11.5% Senior Subordinated Note due 2012 $ 1,500,000 01/28/02 1,401,093 750,000 Common Stock (B) 312,500 shs. 01/28/02 312,500 -- Warrant, exercisable until 2012, to purchase common stock at $.01 per share (B) 243,223 shs. 01/28/02 162,045 -- ------------ ------------ 2,688,138 1,521,875 ------------ ------------ O R S NASCO HOLDING, INC. A wholesale distributor of industrial supplies in North America. 13% Senior Subordinated Note due 2013 $ 2,372,732 12/20/05 2,235,429 2,420,187 Common Stock (B) 177,268 shs. 12/20/05 177,268 212,106 Warrant, exercisable until 2015, to purchase common stock at $.01 per share (B) 99,771 shs. 12/20/05 98,773 119,379 ------------ ------------ 2,511,470 2,751,672 ------------ ------------ OAKRIVER TECHNOLOGY, INC. Designs, engineers and assembles high precision automated process equipment for the medical device industry, with a focus on defibrillators and stents. 10% Senior Secured Note due 2012 $ 565,452 01/03/06 556,970 557,642 13% Senior Subordinated Note due 2013 $ 687,241 01/03/06 616,783 676,404 Common Stock (B) 322,307 shs. 01/03/06 322,307 290,076 Warrant, exercisable until 2013, to purchase common stock at $.01 per share (B) 75,378 shs. 01/03/06 62,824 754 ------------ ------------ 1,558,884 1,524,876 ------------ ------------ OLYMPIC SALES, INC. A boat retailer in Washington state, Oregon, California and British Columbia. 12% Senior Subordinated Note due 2008 $ 1,606,000 08/07/98 1,606,000 1,559,196 12% Senior Subordinated Note due 2008 $ 307,071 02/09/00 300,073 301,490 Limited Partnership Interest of Riverside VIII, VIII-A and VIII-B Holding Company, L.P. 20.57% int. * 1,555,992 1,555,626 Warrants, exercisable until 2007 and 2008, to purchase common stock at $.01 per share (B) 28,648 shs. ** 389,188 385,720 ------------ ------------ 3,851,253 3,802,032 ------------ ------------ ONTARIO DRIVE & GEAR LTD. A manufacturer of all-wheel drive, off-road amphibious vehicles and related accessories. 13% Senior Subordinated Note due 2013 $ 1,977,885 01/17/06 1,788,635 2,003,289 Limited Liability Company Unit (B) 3,667 uts. 01/17/06 572,115 680,542 Warrant, exercisable until 2013, to purchase common stock at $.01 per share (B) 619 shs. 01/17/06 170,801 114,900 ------------ ------------ 2,531,551 2,798,731 ------------ ------------ OVERTON'S HOLDING COMPANY A marketer of marine and water sports accessories in the United States. 12% Senior Subordinated Note due 2014 $ 1,817,308 04/28/06 1,703,368 1,820,692 Common Stock (B) 95 shs. 04/28/06 95,000 85,500 Warrant, exercisable until 2014, to purchase common stock at $.01 per share (B) 94 shs. 04/28/06 83,720 1 ------------ ------------ 1,882,088 1,906,193 ------------ ------------ *08/07/98, 02/23/99, 12/22/99 and 02/25/03. **08/07/98 and 02/09/00. ---------------------------------------------------------------------------------------------------------------------------------- 16 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL CORPORATE INVESTORS March 31, 2007 (Unaudited) Shares, Units, Warrants, Ownership or Acquisition CORPORATE RESTRICTED SECURITIES:(A)(Continued) Principal Amount Date Cost Fair Value -------------- -------- ------------ ------------ P A S HOLDCO LLC An independent provider of maintenance, repair and overhaul services to the aerospace gas turbine engine and airframe markets. 14% Senior Subordinated Note due 2014 $ 2,189,217 07/03/06 $ 2,080,394 $ 2,208,891 Preferred Unit (B) 382 uts. 07/03/06 382,150 363,043 Preferred Unit (B) 69 uts. 07/03/06 68,790 65,351 Common Unit Class I (B) 148 uts. 07/03/06 -- 1 Common Unit Class L (B) 31 uts. 07/03/06 -- -- ------------ ------------ 2,531,334 2,637,286 ------------ ------------ P I I HOLDING CORPORATION A manufacturer of plastic film and bags for the general industrial, medical, and food industries. 12% Senior Subordinated Note due 2013 $ 2,295,000 03/31/06 2,148,643 2,294,037 Preferred Stock (B) 36 shs. 03/31/06 329,596 313,116 Common Stock (B) 23 shs. 03/31/06 25,500 22,950 Warrant, exercisable until 2013, to purchase common stock at $.01 per share (B) 13 shs. 03/31/06 11,122 -- ------------ ------------ 2,514,861 2,630,103 ------------ ------------ 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 2,039,288 2,117,156 Membership Interests of MM/Lincap PPI Investments, Inc., LLC (B) 2.42% int. 12/21/00 265,625 367,334 ------------ ------------ 2,304,913 2,484,490 ------------ ------------ POSTLE ALUMINUM COMPANY LLC A manufacturer and distributor of aluminum extruded products. 12% Senior Subordinated Note due 2014 $ 2,040,000 10/02/06 1,889,214 2,051,937 Limited Liability Company Unit (B) 1,384 uts. 10/02/06 510,000 484,497 Warrant, exercisable until 2016, to purchase common stock at $.01 per share (B) 344 shs. 10/02/06 124,644 3 ------------ ------------ 2,523,858 2,536,437 ------------ ------------ 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 -- ------------ ------------ QUALIS AUTOMOTIVE LLC A distributor of aftermarket automotive brake and chassis products. 12% Senior Subordinated Note due 2012 $ 1,770,833 05/28/04 1,494,130 1,773,142 Common Stock 354,166 shs. 05/28/04 354,166 121,880 Warrant, exercisable until 2012, to purchase common stock at $.01 per share 377,719 shs. 05/28/04 377,719 129,985 ------------ ------------ 2,226,015 2,025,007 ------------ ------------ *11/14/01 and 08/12/94. ---------------------------------------------------------------------------------------------------------------------------------- 17 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL CORPORATE INVESTORS March 31, 2007 (Unaudited) Shares, Units, Warrants, Ownership or Acquisition CORPORATE RESTRICTED SECURITIES:(A)(Continued) Principal Amount Date Cost Fair Value -------------- -------- ------------ ------------ QUALSERV CORPORATION A provider of foodservice equipment and supplies to major restaurant chains and their franchisees. 14% Senior Subordinated Note due 2012 (D) $ 1,893,563 07/09/04 $ 1,844,035 $ -- Limited Partnership Interest (B) 9.26% int. 07/09/04 259,146 -- Warrant, exercisable until 2012, to purchase common stock at $.01 per share (B) 528 shs. 07/09/04 49,061 -- ------------ ------------ 2,152,242 -- ------------ ------------ R A J MANUFACTURING HOLDINGS LLC A designer and manufacturer of women's swimwear sold under a variety of licensed brand names. 12.5% Senior Subordinated Note due 2014 $ 2,267,190 12/15/06 2,090,363 2,272,712 Limited Liability Company Unit (B) 2,828 uts. 12/15/06 282,810 268,670 Warrant, exercisable until 2014, to purchase common stock at $.01 per share (B) 3 shs. 12/15/06 131,483 -- ------------ ------------ 2,504,656 2,541,382 ------------ ------------ RADIAC ABRASIVES, INC. A manufacturer of bonded abrasive and super abrasive grinding wheels in the United States. 12% Senior Subordinated Note due 2014 $ 2,260,638 02/10/06 2,107,299 2,328,457 Common Stock (B) 289,362 shs. 02/10/06 289,362 260,426 Warrant, exercisable until 2016, to purchase common stock at $.01 per share (B) 131,555 shs. 02/10/06 119,796 1,316 ------------ ------------ 2,516,457 2,590,199 ------------ ------------ RIVER RANCH FRESH FOODS LLC A supplier of fresh produce to the retail and foodservice channels. 13% Senior Subordinated Note due 2011 (D) $ 1,841,667 09/29/04 1,683,764 1,473,334 Limited Liability Company Unit (B) 40,610 uts. 09/29/04 283,333 -- 18% Preferred Stock (B) 141,667 shs. 11/16/06 141,667 141,667 Warrant, exercisable until 2011, to purchase common stock at $.01 per share (B) 23,575 shs. 09/29/04 157,903 -- ------------ ------------ 2,266,667 1,615,001 ------------ ------------ 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 11/14/03 975,569 1,083,750 Warrant, exercisable until 2011, to purchase common stock at $.01 per share (B) 140 shs. 11/14/03 122,946 191,250 ------------ ------------ 1,098,515 1,275,000 ------------ ------------ SAFETY SPEED CUT MANUFACTURING COMPANY, INC. A manufacturer of vertical panel saws and routers for the wood working industry. 8.85% Senior Secured Tranche A Note due 2007 (C) $ 141,332 06/02/99 141,332 141,332 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 1,161,675 ------------ ------------ 1,528,196 2,433,659 ------------ ------------ SAVAGE SPORTS HOLDING, INC. A manufacturer of sporting firearms. 12% Senior Subordinated Note due 2012 $ 1,538,793 09/10/04 1,447,936 1,564,376 Common Stock (B) 586 shs. 09/10/04 586,207 612,815 Warrant, exercisable until 2012, to purchase common stock at $.01 per share (B) 134 shs. 09/10/04 113,578 139,684 ------------ ------------ 2,147,721 2,316,875 ------------ ------------ ---------------------------------------------------------------------------------------------------------------------------------- 18 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL CORPORATE INVESTORS March 31, 2007 (Unaudited) Shares, Units, Warrants, Ownership or Acquisition CORPORATE RESTRICTED SECURITIES:(A)(Continued) Principal Amount Date Cost Fair Value -------------- -------- ------------ ------------ SPECIALTY FOODS GROUP, INC. A manufacturer and distributor of branded meat products. Limited Partnership Interest of MHD Holdings LLC 1.43% int. 08/29/00 $ 684,724 $ -- ------------ ------------ STANTON CARPET HOLDING CO. A designer and marketer of high and mid-priced decorative carpets and rugs. 12.13% Senior Subordinated Note due 2014 $ 2,239,024 08/01/06 2,105,029 2,243,802 Common Stock (B) 311 shs. 08/01/06 310,976 279,882 Warrant, exercisable until 2014, to purchase common stock at $.01 per share (B) 104 shs. 08/01/06 93,293 1 ------------ ------------ 2,509,298 2,523,685 ------------ ------------ 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. Limited Liability Company Unit (B) 1.99% int. 08/20/03 63,206 14,100 Warrant, exercisable until 2011, to purchase common stock at $.01 per share (B) 86,780 shs. 08/21/03 19,359 19,359 ------------ ------------ 82,565 33,459 ------------ ------------ TANGENT RAIL CORPORATION A manufacturer of rail ties and provides specialty services to the North American railroad industry. 13% Senior Subordinated Note due 2013 $ 2,217,385 10/14/05 1,911,165 2,261,733 Preferred Stock 1,324 shs. 10/14/05 132,370 139,652 Common Stock (B) 2,203 shs. 10/14/05 2,203 396,211 Warrant, exercisable until 2013, to purchase common stock at $.01 per share (B) 1,167 shs. 10/14/05 294,403 209,886 ------------ ------------ 2,340,141 3,007,482 ------------ ------------ 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. 8.6% Senior Secured Tranche B Note due 2012 (C) $ 1,530,066 * 1,524,917 1,514,986 12% Senior Subordinated Note due 2014 $ 1,162,110 ** 1,106,914 1,164,795 Limited Partnership Interest of Saw Mill Capital Fund V, L.P. 2.30% int. 03/01/05 116,285 194,175 Warrant, exercisable until 2016, to purchase common stock at $.01 per share (B) 72 shs. 04/28/06 60,597 48,749 ------------ ------------ 2,808,713 2,922,705 ------------ ------------ TOTAL EQUIPMENT & SERVICE, INC. A manufacturer of a wide variety of equipment used in the oil and gas industry. 10.5% Senior Secured Term Note due 2013 $ 851,351 03/02/07 838,581 839,062 13% Senior Subordinated Note due 2014 $ 598,450 03/02/07 490,608 587,601 Common Stock (B) 125,199 shs. 03/02/07 125,199 118,939 Warrant, exercisable until 2014 to purchase common stock at $.01 per share (B) 34,533 shs. 03/02/07 95,873 345 ------------ ------------ 1,550,261 1,545,947 ------------ ------------ *04/28/06 and 12/21/06. **04/28/06 and 09/13/06. ---------------------------------------------------------------------------------------------------------------------------------- 19 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL CORPORATE INVESTORS March 31, 2007 (Unaudited) Shares, Units, Warrants, Ownership or Acquisition CORPORATE RESTRICTED SECURITIES:(A)(Continued) Principal Amount Date Cost Fair Value -------------- -------- ------------ ------------ THE TRANZONIC COMPANIES A producer of commercial and industrial supplies, such as safety products, janitorial supplies, work apparel, washroom and restroom supplies and sanitary care products. 13% Senior Subordinated Note due 2009 $ 2,712,000 02/05/98 $ 2,582,241 $ 2,712,000 Common Stock (B) 630 shs. 02/04/98 630,000 217,510 Warrant, exercisable until 2009, to purchase common stock at $.01 per share (B) 444 shs. 02/05/98 368,832 153,293 ------------ ------------ 3,581,073 3,082,803 ------------ ------------ TRANSTAR HOLDING COMPANY A distributor of aftermarket automotive transmission parts. 12% Senior Subordinated Note due 2013 $ 1,734,000 08/31/05 1,665,084 1,780,410 Common Stock (B) 816 shs. 08/31/05 816,000 764,272 Warrant, exercisable until 2013, to purchase common stock at $.01 per share (B) 86 shs. 08/31/05 77,485 80,492 ------------ ------------ 2,558,569 2,625,174 ------------ ------------ 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 $ 395,108 01/20/00 395,108 397,298 12% Senior Subordinated Note due 2010 $ 1,326,500 01/20/00 1,289,702 1,349,704 Common Stock (B) 227,400 shs. 01/20/00 227,400 873,418 Warrant, exercisable until 2010, to purchase common stock at $1 per share (B) 260,563 shs. 01/20/00 98,540 1,000,794 ------------ ------------ 2,010,750 3,621,214 ------------ ------------ TRUCK BODIES & EQUIPMENT INTERNATIONAL A designer and manufacturer of accessories for heavy and medium duty trucks, primarily dump bodies, hoists, various forms of flat-bed bodies, landscape bodies and other accessories. 12% Senior Subordinated Note due 2013 $ 2,309,541 * 2,159,987 2,361,074 Common Stock (B) 742 shs. * 800,860 1,843,139 Warrant, exercisable until 2013, to purchase common stock at $.02 per share (B) 153 shs. * 159,894 380,674 ------------ ------------ 3,120,741 4,584,887 ------------ ------------ TRUSTILE DOORS, INC. A manufacturer and distributor of interior doors. 12.5% Senior Subordinated Note due 2010 $ 1,062,500 04/11/03 1,009,574 1,083,750 Warrant, exercisable until 2010, to purchase common stock at $.01 per share (B) 5,781 shs. 04/11/03 90,618 218,556 ------------ ------------ 1,100,192 1,302,306 ------------ ------------ U S S HOLDINGS, INC. A producer of high grade industrial and specialty silica sands. 14% Redeemable Preferred Stock (B) 997 shs. 09/30/99 545,858 933,236 Convertible Preferred Stock Series A and B, convertible into common stock at $8.02 per share (B) 145,446 shs. 12/19/96 1,166,830 -- Common Stock (B) 20,027 shs. 09/30/99 799,068 -- Warrants, exercisable until 2010 to purchase common stock at $.01 per share (B) 4,918 shs. ** 128,372 -- ------------ ------------ 2,640,128 933,236 ------------ ------------ *07/19/05 and 12/22/05. **12/19/96 and 09/30/99. ---------------------------------------------------------------------------------------------------------------------------------- 20 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL CORPORATE INVESTORS March 31, 2007 (Unaudited) Shares, Units, Warrants, Ownership or Acquisition CORPORATE RESTRICTED SECURITIES:(A)(Continued) Principal Amount Date Cost Fair Value -------------- -------- ------------ ------------ U-LINE CORPORATION A manufacturer of high-end, built-in, undercounter ice making, wine storage and refrigeration appliances. 12.5% Senior Subordinated Note due 2012 $ 1,882,100 04/30/04 $ 1,719,273 $ 1,882,100 Common Stock (B) 182 shs. 04/30/04 182,200 310,250 Warrant, exercisable until 2012, to purchase common stock at $.01 per share (B) 230 shs. 04/30/04 211,736 392,360 ------------ ------------ 2,113,209 2,584,710 ------------ ------------ VICTORY VENTURES LLC An acquirer of controlling or substantial interests in other entities. Series A Preferred Units (B) 0.15% int. 12/02/96 1 -- ------------ ------------ VITALITY FOODSERVICE, INC. A non-carbonated beverage dispensing company focused on the foodservice industry. 15% Senior Subordinated Note due 2011 $ 1,948,061 09/24/04 1,810,084 1,762,254 Common Stock (B) 26,456 shs. * 264,558 211,648 Warrant, exercisable until 2011, to purchase common stock at $.01 per share (B) 23,787 shs. 09/24/04 186,883 190,296 ------------ ------------ 2,261,525 2,164,198 ------------ ------------ VITEX PACKAGING GROUP, INC. A manufacturer of specialty packaging, primarily envelopes and tags used on tea bags. 12.5% Senior Subordinated Note due 2012 $ 1,700,000 07/19/04 1,483,065 1,562,326 Limited Liability Company Unit Class A (B) 1.75% int. 07/19/04 414,375 331,500 Limited Liability Company Unit Class B (B) 0.77% int. 07/19/04 182,935 146,348 ------------ ------------ 2,080,375 2,040,174 ------------ ------------ WALLS INDUSTRIES, INC. A provider of branded workwear and sporting goods apparel. 12.35% Senior Subordinated Lien Note due 2009 (C) $ 652,413 07/12/04 652,413 653,391 14% Senior Subordinated Note due 2012 $ 1,085,380 07/12/04 1,082,856 1,107,088 Limited Partnership Interest (B) 0.40% int. 07/12/04 37,281 684,735 Warrant, exercisable until 2014, to purchase common stock at $.01 per share (B) 4,029 shs. 07/12/04 2,833 73,997 ------------ ------------ 1,775,383 2,519,211 ------------ ------------ WELLBORN FOREST HOLDING CO. A manufacturer of semi-custom kitchen and bath cabinetry. 12.13% Senior Subordinated Note due 2014 $ 1,721,250 11/30/06 1,602,025 1,682,600 Common Stock (B) 191 shs. 11/30/06 191,250 181,688 Warrant, exercisable until 2014, to purchase common stock at $.01 per share (B) 95 shs. 11/30/06 86,493 1 ------------ ------------ 1,879,768 1,864,289 ------------ ------------ Total Private Placement Investments $180,747,138 $181,395,519 ------------ ------------ *09/24/04 and 12/22/06. ---------------------------------------------------------------------------------------------------------------------------------- 21 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL CORPORATE INVESTORS March 31, 2007 (Unaudited) Shares or Interest Due Principal CORPORATE RESTRICTED SECURITIES: (A) (CONTINUED) Rate Date Amount Cost Fair Value ------- -------- ------------ ------------ ------------ RULE 144A SECURITIES - 6.53%: BONDS - 6.53% American Tire Distributor (C) 11.610% 04/01/12 $ 1,000,000 $ 950,000 $ 1,000,000 Aramark Corporation 8.500 02/01/15 200,000 200,000 207,000 Aramark Corporation 8.860 02/01/15 200,000 200,000 205,750 Bombardier, Inc. 6.300 05/01/14 1,000,000 890,000 950,000 Calpine Corporation 8.750 07/15/13 500,000 465,000 532,500 Chaparral Energy, Inc. 8.875 02/01/17 1,500,000 1,491,780 1,507,500 Charter Communications Op LLC 8.000 04/30/12 250,000 249,375 260,313 Douglas Dynamics LLC 7.750 01/15/12 630,000 633,138 585,900 G F S I, Inc. (C) 11.500 06/01/11 750,000 682,541 742,500 H C A, Inc. 9.250 11/15/16 975,000 992,077 1,051,781 Hawker Beechcraft Acquisition Co. 9.750 04/01/17 50,000 50,000 52,250 Idearc, Inc. 8.000 11/15/16 600,000 600,000 617,250 Packaging Dynamics Corporation of America 10.000 05/01/16 1,250,000 1,256,718 1,287,500 Pregis Corporation 12.375 10/15/13 1,000,000 981,490 1,100,000 Rental Service Corporation 9.500 12/01/14 1,000,000 1,014,073 1,065,000 Sbarro, Inc. 10.375 02/01/15 1,000,000 1,019,857 1,040,000 Steel Dynamics, Inc. 6.750 04/01/15 200,000 200,000 200,500 Stewart & Stevenson LLC 10.000 07/15/14 1,500,000 1,540,281 1,571,250 Tekni-Plex, Inc. 9.750 11/15/13 650,000 655,604 650,000 Tenaska Alabama Partners LP 7.000 06/30/21 342,701 342,701 344,884 Titan International, Inc. 8.000 01/15/12 150,000 150,000 154,313 Tube City IMS Corporation 9.750 02/01/15 625,000 649,891 650,000 Tunica-Biloxi Gaming Authority 9.000 11/15/15 1,000,000 1,031,675 1,062,500 ------------ ------------ TOTAL BONDS 16,246,201 16,838,691 ------------ ------------ COMMON STOCK - 0.00% Jordan Telecom Products (B) 70 $ 14,000 -- ------------ ------------ TOTAL COMMON STOCK 14,000 -- ------------ ------------ WARRANTS - 0.00% Winsloew Furniture, Inc. (B) 900 $ 9 $ -- ------------ ------------ TOTAL WARRANTS 9 -- ------------ ------------ TOTAL RULE 144A SECURITIES 16,260,210 16,838,691 ------------ ------------ TOTAL CORPORATE RESTRICTED SECURITIES $197,007,348 $198,234,210 ------------ ------------ ---------------------------------------------------------------------------------------------------------------- 22 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL CORPORATE INVESTORS March 31, 2007 (Unaudited) Interest Due Principal CORPORATE PUBLIC SECURITIES - 27.16%: (A) Rate Date Amount Cost Market Value ------- -------- ------------ ------------ ------------ BONDS - 25.87% A M C Entertainment, Inc. 11.000% 02/01/16 $ 815,000 $ 817,362 $ 928,080 Activant Solutions, Inc. 9.500 05/01/16 150,000 150,000 147,750 Affinia Group, Inc. 9.000 11/30/14 1,010,000 936,125 1,025,150 Alamosa Delaware, Inc. 11.000 07/31/10 325,000 328,528 347,353 Alamosa Delaware, Inc. 8.500 01/31/12 400,000 400,000 423,558 ALH Fin LLC / ALH Fin Corporation 8.500 01/15/13 1,450,000 1,418,813 1,446,375 Allied Waste NA 7.875 04/15/13 1,000,000 1,021,459 1,037,500 Appleton Papers, Inc. 8.125 06/15/11 300,000 300,000 308,250 Atlas Pipeline Partners 8.125 12/15/15 200,000 200,000 206,000 Bally Total Fitness Holdings Corporation 9.875 10/15/07 135,000 128,925 109,013 Basic Energy Services 7.125 04/15/16 225,000 225,000 219,375 BCP Crystal US Holdings Corporation 9.625 06/15/14 485,000 485,000 550,920 Blockbuster, Inc. (C) 9.000 09/01/12 475,000 475,903 479,750 Brigham Exploration Co. 9.625 05/01/14 700,000 690,403 707,000 CCH I Holdings LLC 11.125 01/15/14 2,000,000 1,573,688 1,870,000 Cablevision Systems Corporation 8.000 04/15/12 1,000,000 1,013,079 1,015,000 Cenveo Corporation 7.875 12/01/13 1,100,000 1,100,000 1,078,000 Chemed Corporation 8.750 02/24/11 1,125,000 1,125,000 1,170,000 Cincinnati Bell, Inc. 8.375 01/15/14 1,100,000 1,007,500 1,124,750 Clayton Williams Energy, Inc. 7.750 08/01/13 800,000 800,000 752,000 Dave and Buster's, Inc. 11.250 03/15/14 1,500,000 1,537,565 1,530,000 Del Monte Corporation 8.625 12/15/12 225,000 225,000 234,000 Dynegy Holdings, Inc. 6.875 04/01/11 500,000 422,500 501,250 Dynegy Holdings, Inc. 8.375 05/01/16 330,000 330,000 343,200 Edison Mission Energy 7.750 06/15/16 55,000 55,000 57,338 Esterline Technologies 7.750 06/15/13 200,000 200,000 205,500 Flextronics International Ltd. 6.500 05/15/13 400,000 400,000 396,000 Ford Motor Credit Co. 7.375 10/28/09 1,250,000 1,246,875 1,247,703 Ford Motor Credit Co. 8.000 12/15/16 300,000 294,966 288,980 Freeport-McMoran Copper & Gold 8.375 04/01/17 385,000 385,000 416,280 Gencorp, Inc. 9.500 08/15/13 259,000 259,000 275,835 General Motors Acceptance Corporation 7.750 01/19/10 1,250,000 1,290,037 1,283,026 General Motors Corporation 8.250 07/15/23 1,000,000 920,000 900,000 Goodyear Tire & Rubber Co. 7.857 08/15/11 1,400,000 1,342,750 1,464,750 GulfMark Offshore, Inc. 7.750 07/15/14 565,000 562,599 573,475 Hawaiian Telcom Communications 12.500 05/01/15 1,425,000 1,567,979 1,560,375 Inergy LP 8.250 03/01/16 150,000 150,000 157,500 Insurance Auto Auctions, Inc. 11.000 04/01/13 1,000,000 1,008,740 1,155,000 Interline Brands, Inc. 8.125 06/15/14 325,000 322,670 335,563 Iron Mountain, Inc. 8.750 07/15/18 1,065,000 1,099,566 1,144,875 Koppers, Inc. 9.875 10/15/13 477,000 477,000 517,545 Land O'Lakes, Inc. 9.000 12/15/10 750,000 750,000 795,000 Lazard LLC 7.125 05/15/15 750,000 749,408 790,713 Leucadia National Corporation 7.000 08/15/13 650,000 660,695 653,250 Liberty Media Corporation 5.700 05/15/13 1,000,000 951,610 958,770 M G M Mirage, Inc. 6.000 10/01/09 375,000 378,013 375,469 Mac-Gray Corporation 7.625 08/15/15 600,000 600,000 612,000 Majestic Star Casino LLC 9.500 10/15/10 500,000 500,000 524,375 Manitowoc Company, Inc. 7.125 11/01/13 200,000 200,000 204,000 Markwest Energy Operating Co. 6.875 11/01/14 775,000 763,000 751,750 Mediacom Broadband LLC 8.500 10/15/15 1,000,000 1,021,845 1,022,500 Metaldyne Corporation 11.000 06/15/12 750,000 601,250 710,588 Metaldyne Corporation (C) 10.000 11/01/13 510,000 513,403 521,475 N R G Energy, Inc. 7.375 02/01/16 175,000 175,000 179,813 NTL Cable PLC 9.125 08/15/16 980,000 1,002,682 1,033,900 Nalco Co. 7.750 11/15/11 500,000 500,000 512,500 Neiman Marcus Group, Inc. 10.375 10/15/15 1,250,000 1,250,000 1,393,750 Newark Group, Inc. 9.750 03/15/14 850,000 796,863 886,125 ---------------------------------------------------------------------------------------------------------------- 23 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL CORPORATE INVESTORS March 31, 2007 (Unaudited) Interest Due Principal Corporate Public Securities: (A) (Continued) Rate Date Amount Cost Market Value ------- -------- ------------ ------------ ------------ BONDS, CONTINUED North American Energy Partners 8.750% 12/01/11 $ 400,000 $ 400,000 $ 408,000 Nova Chemicals Corporation (C) 8.502 11/15/13 475,000 475,000 472,625 O E D Corp / Diamond Jo Company Guarantee 8.750 04/15/12 1,000,000 985,960 992,500 Offshore Logistics, Inc. 6.125 06/15/13 450,000 450,000 428,625 P Q Corporation 7.500 02/15/13 1,100,000 1,088,750 1,111,000 Pacific Energy Partners 7.125 06/15/14 500,000 503,623 522,160 Pacific Energy Partners 6.250 09/15/15 150,000 149,316 149,993 Petrohawk Energy Corp. 9.125 07/15/13 1,000,000 997,864 1,065,000 Pinnacle Foods Group 8.250 12/01/13 450,000 450,000 489,398 Pliant Corporation (C) 11.850 06/15/09 882,910 887,668 999,896 Primedia, Inc. 8.000 05/15/13 1,000,000 1,021,962 1,035,000 Quality Distribution LLC 9.000 11/15/10 1,030,000 1,001,575 988,800 Quality Distribution LLC (C) 9.860 01/15/12 325,000 323,375 328,250 Quicksilver Resources, Inc. 7.125 04/01/16 500,000 500,000 492,500 Rent-A-Center, Inc. 7.500 05/01/10 400,000 400,000 403,000 Rock-Tenn Co. 8.200 08/15/11 175,000 176,088 185,500 Service Corp International (C) 7.000 06/15/17 1,000,000 990,030 1,007,500 Sheridan Acquisition Corporation 10.250 08/15/11 375,000 370,000 392,344 Sierra Pacific Resources 6.750 08/15/17 635,000 638,103 648,209 Stanadyne Corporation 10.000 08/15/14 1,500,000 1,500,000 1,545,000 Stratos Global 9.875 02/15/13 575,000 578,580 613,813 Tekni-Plex, Inc. 12.750 06/15/10 1,000,000 960,125 935,000 Tenet Healthcare Corporation 9.875 07/01/14 500,000 488,370 505,000 Tenneco, Inc. 8.625 11/15/14 1,000,000 1,002,500 1,042,500 Tennessee Gas Pipeline Co. 7.000 03/15/27 500,000 523,652 534,035 Texas Industries, Inc. 7.250 07/15/13 70,000 70,000 72,100 Trimas Corporation 9.875 06/15/12 1,065,000 1,006,250 1,063,669 Triton PCS, Inc. 8.500 06/01/13 550,000 550,000 566,500 Unisys Corporation 8.000 10/15/12 190,000 190,000 190,475 United Components, Inc. 9.375 06/15/13 1,080,000 1,081,490 1,117,800 United Rentals, Inc. 7.750 11/15/13 625,000 625,000 642,188 United Rentals, Inc. 7.000 02/15/14 500,000 500,000 498,750 Universal City Florida (C) 10.110 05/01/10 200,000 200,000 206,250 Universal City Florida (C) 8.375 05/01/10 200,000 200,000 206,250 Vertis, Inc. 10.875 06/15/09 1,030,000 1,040,133 1,040,300 Vought Aircraft Industries 8.000 07/15/11 1,000,000 999,548 980,000 Warner Music Group Corporation 7.375 04/15/14 275,000 275,000 261,938 Waste Services, Inc. 9.500 04/15/14 1,100,000 1,123,637 1,152,250 ------------ ------------ TOTAL BONDS 64,431,400 66,754,115 ------------ ------------ ---------------------------------------------------------------------------------------------------------------- 24 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONT.) MASSMUTUAL CORPORATE INVESTORS March 31, 2007 (Unaudited) Shares or Interest Due Principal Corporate Public Securities: (A) (Continued) Rate Date Amount Cost Market Value ------- -------- ------------ ------------ ------------ COMMON STOCK - 1.06% Bally Total Fitness Holdings Corporation (B) 600 $ 5,520 $ 366 PepsiAmericas, Inc. 92,145 2,006,365 2,056,676 Supreme Industries, Inc. 115,721 267,323 676,968 ------------ ------------ TOTAL COMMON STOCK 2,279,208 2,734,010 ------------ ------------ CONVERTIBLE BONDS - 0.23% Citadel Broadcasting Corporation 1.875% 02/15/11 $ 700,000 $ 543,375 $ 593,250 ------------ ------------ TOTAL CONVERTIBLE BONDS 543,375 593,250 ------------ ------------ TOTAL CORPORATE PUBLIC SECURITIES $ 67,253,983 $ 70,081,375 ------------ ------------ Interest Due Principal SHORT-TERM SECURITIES: Rate/Yield* Date Amount Cost Market Value -------- -------- ------------ ------------ ------------ COMMERCIAL PAPER - 2.01% Kraft Foods, Inc. 5.450% 04/02/07 $ 5,187,000 $ 5,185,429 $ 5,185,429 ------------ ------------ TOTAL SHORT-TERM SECURITIES $ 5,185,429 $ 5,185,429 ------------ ------------ TOTAL INVESTMENTS 106.01% $269,446,760 $273,501,014 ============ ------------ Other Assets 2.50 6,464,636 Liabilities (8.51) (21,966,127) ------ ------------ TOTAL NET ASSETS 100.00% $257,999,523 ====== ============ (A) In each of the convertible note, warrant, convertible preferred and common stock investments, the issuer has agreed to provide certain registration rights. (B) Non-income producing security. (C) Variable rate security; rate indicated is as of 03/31/07. (D) Defaulted security; interest not accrued. * Effective yield at purchase See Notes to Consolidated Financial Statements. ---------------------------------------------------------------------------------------------------------------- 25 CONSOLIDATED SCHEDULE OF INVESTMENTS (CONT.) MASSMUTUAL CORPORATE INVESTORS March 31, 2007 (Unaudited) Fair Value/ Fair Value/ INDUSTRY CLASSIFICATION: Market Value Market Value -------------- -------------- AEROSPACE - 2.76% BUILDINGS & REAL ESTATE - 2.26% Consolidated Foundries Holdings $ 3,019,842 Adorn, Inc. $ 1,940,517 Esterline Technologies 205,500 K W P I Holdings Corporation 2,506,504 Gencorp, Inc. 275,835 Texas Industries, Inc. 72,100 P A S Holdco LLC 2,637,286 TruStile Doors, Inc. 1,302,306 Vought Aircraft Industries 980,000 -------------- -------------- 5,821,427 7,118,463 -------------- -------------- CHEMICAL, PLASTICS & RUBBER - 1.40% AUTOMOBILE - 9.84% BCP Crystal US Holdings Corporation 550,920 American Tire Distributor 1,000,000 Capital Specialty Plastics, Inc. 447,145 Ford Motor Credit Co. 1,536,683 Koppers, Inc. 517,545 Fuel Systems Holding Corporation 2,980,006 Nalco Co. 512,500 General Motors Acceptance Corporation 1,283,026 Nova Chemicals Corporation 472,625 General Motors Corporation 900,000 P Q Corporation 1,111,000 Goodyear Tire & Rubber Co. 1,464,750 -------------- Jason, Inc. 1,780,340 3,611,735 LIH Investors, L.P. 1,922,500 -------------- Metaldyne Corporation 1,232,063 CONSUMER PRODUCTS - 9.32% Nyloncraft, Inc. 1,521,875 Aero Holdings, Inc. 3,078,484 Ontario Drive & Gear Ltd. 2,798,731 ALH Fin LLC/ALH Fin Corporation 1,446,375 Qualis Automotive LLC 2,025,007 Augusta Sportswear Holding Co. 3,119,144 Tenneco, Inc. 1,042,500 Bravo Sports Holding Corporation 2,411,679 Titan International, Inc. 154,313 G F S I, Inc. 742,500 Transtar Holding Company 2,625,174 K N B Holdings Corporation 2,550,249 United Components, Inc. 1,117,800 Momentum Holding Co. 1,277,369 -------------- R A J Manufacturing Holdings LLC 2,541,382 25,384,768 Royal Baths Manufacturing Company 1,275,000 -------------- The Tranzonic Companies 3,082,803 BEVERAGE, DRUG & FOOD - 5.73% Walls Industries, Inc. 2,519,211 Aramark Corporation 412,750 Winsloew Furniture, Inc. -- Beta Brands Ltd. -- -------------- Cains Foods, L.P. 308,863 24,044,196 Dave and Buster's, Inc. 1,530,000 -------------- Del Monte Corporation 234,000 CONTAINERS, PACKAGING & GLASS - 5.72% Eagle Pack Pet Foods, Inc. 1,623,437 Flutes, Inc. 1,580,839 Land O'Lakes, Inc. 795,000 Maverick Acquisition Company 1,054,220 Nonni's Food Company 2,513,682 P I I Holding Corporation 2,630,103 PepsiAmericas, Inc. 2,056,676 Packaging Dynamics Corporation of America 1,287,500 Pinnacle Foods Group 489,398 Paradigm Packaging, Inc. 2,484,490 River Ranch Fresh Foods LLC 1,615,001 Pliant Corporation 999,896 Sbarro, Inc. 1,040,000 Pregis Corporation 1,100,000 Specialty Foods Group, Inc. -- Tekni-Plex, Inc. 1,585,000 Vitality Foodservice, Inc. 2,164,198 Vitex Packaging, Inc. 2,040,174 -------------- -------------- 14,783,005 14,762,222 -------------- -------------- BROADCASTING & ENTERTAINMENT - 2.63% DISTRIBUTION - 3.93% CCH I Holdings LLC 1,870,000 Affina Group, Inc. 1,025,150 Cablevision Systems Corporation 1,015,000 Duncan Systems, Inc. 1,537,003 Cenveo Corporation 1,078,000 Kele and Associates, Inc. 2,871,312 Citadel Broadcasting Corporation 593,250 Magnatech International, Inc. 1,955,481 Charter Communications Op LLC 260,313 O R S Nasco Holding, Inc. 2,751,672 Liberty Media Corporation 958,770 QualServ Corporation -- Mediacom Broadband LLC 1,022,500 Strategic Equipment & Supply Corporation, Inc. -- -------------- -------------- 6,797,833 10,140,618 -------------- -------------- ------------------------------------------------------------------------------------------------------------------------------------ 26 CONSOLIDATED SCHEDULE OF INVESTMENTS (CONT.) MASSMUTUAL CORPORATE INVESTORS March 31, 2007 (Unaudited) Fair Value/ Fair Value/ INDUSTRY CLASSIFICATION: (Cont.) Market Value Market Value -------------- -------------- DIVERSIFIED/CONGLOMERATE, HEALTHCARE, EDUCATION & MANUFACTURING - 7.92% CHILDCARE - 3.65% Activant Solutions, Inc. $ 147,750 A T I Acquisition Company $ 2,140,402 AmerCable, Inc. 1,660,953 American Hospice Management Holding LLC 2,557,481 Arrow Tru-Line Holdings, Inc. 2,199,226 F H S Holdings LLC 2,676,779 Bombardier, Inc. 950,000 H C A, Inc. 1,051,781 Coining Corporation of America LLC 2,674,835 MedAssist, Inc. 484,164 Dexter Magnetics Technologies, Inc. 1,429,484 Tenet Healthcare Corporation 505,000 Douglas Dynamics LLC 585,900 -------------- Evans Consoles, Inc. -- 9,415,607 Postle Aluminum Company LLC 2,536,437 -------------- Radiac Abrasives, Inc. 2,590,199 HOME & OFFICE FURNISHINGS, HOUSEWARES, Trimas Corporation 1,063,669 AND DURABLE CONSUMER PRODUCTS - 6.54% Truck Bodies & Equipment International 4,584,887 Connor Sport Court International, Inc. 1,000,561 -------------- H M Holding Company 2,318,903 20,423,340 Home Decor Holding Company 2,426,471 Justrite Manufacturing Acquisition Co. 1,727,199 DIVERSIFIED/CONGLOMERATE, Monessen Holding Corporation 2,425,013 SERVICE - 3.67% Stanton Carpet Holding Co. 2,523,685 Allied Waste NA 1,037,500 U-Line Corporation 2,584,710 CapeSuccess LLC 5,862 Wellborn Forest Holding Co. 1,864,289 Chemed Corporation 1,170,000 -------------- Diversco, Inc./DHI Holdings, Inc. -- 16,870,831 Dwyer Group, Inc. 1,147,074 -------------- Fowler Holding, Inc. 2,563,180 LEISURE, AMUSEMENT, Interline Brands, Inc. 335,563 ENTERTAINMENT - 4.01% Iron Mountain, Inc. 1,144,875 A M C Entertainment, Inc. 928,080 Mac-Gray Corporation 612,000 Bally Total Fitness Holding Corporation 109,379 Moss, Inc. 437,659 Keepsake Quilting, Inc. 1,464,744 Service Corporation International 1,007,500 M G M Mirage, Inc. 375,469 -------------- Majestic Star Casino LLC 524,375 9,461,213 O E D Corp/Diamond Jo Company Guarantee 992,500 -------------- Overton's Holding Company 1,906,193 ELECTRONICS - 2.68% Savage Sports Holding, Inc. 2,316,875 Calpine Corporation 532,500 Tunica-Biloxi Gaming Authority 1,062,500 Connecticut Electric, Inc. 2,617,668 Universal City Florida 412,500 Directed Electronics, Inc. 3,365,790 Warner Music Group Corporation 261,938 Flextronics International Ltd. 396,000 -------------- -------------- 10,354,553 6,911,958 -------------- -------------- MACHINERY - 9.76% FARMING & AGRICULTURE - 0.00% Davis-Standard LLC 2,529,428 Protein Genetics, Inc. -- Hawk Precision Components Group, Inc. 2,461,106 -------------- Integration Technology Systems, Inc. 1,248,333 FINANCIAL SERVICES - 0.58% Manitowoc Company, Inc. 204,000 Hawker Beechcraft Acquisition Co. 52,250 Maxon Corporation 3,792,140 Highgate Capital LLC -- Morton Industrial Group, Inc. 2,546,765 Lazard LLC 790,713 Navis Global 2,513,797 Leucadia National Corporation 653,250 Safety Speed Cut Manufacturing Company, Inc. 2,433,659 Victory Ventures LLC -- Stanadyne Corporation 1,545,000 -------------- Stewart & Stevenson LLC 1,571,250 1,496,213 Supreme Industries, Inc. 676,968 -------------- Synventive Equity LLC 33,459 Tronair, Inc. 3,621,214 -------------- 25,177,119 -------------- ------------------------------------------------------------------------------------------------------------------------------------ 27 CONSOLIDATED SCHEDULE OF INVESTMENTS (CONT.) MASSMUTUAL CORPORATE INVESTORS March 31, 2007 (Unaudited) Fair Value/ Fair Value/ INDUSTRY CLASSIFICATION: (Cont.) Market Value Market Value -------------- -------------- MEDICAL DEVICES/BIOTECH - 2.48% RETAIL STORES - 3.66% Coeur, Inc. $ 1,439,600 Blockbuster, Inc. $ 479,750 E X C Acquisition Corporation 154,550 Insurance Auto Auctions, Inc. 1,155,000 MicroGroup, Inc. 3,280,842 Neiman Marcus Group, Inc. 1,393,750 OakRiver Technology, Inc. 1,524,876 Olympic Sales, Inc. 3,802,032 -------------- Rent-A-Center, Inc. 403,000 6,399,868 Rental Service Corporation 1,065,000 -------------- United Rentals, Inc. 1,140,938 MINING, STEEL, IRON & NON PRECIOUS -------------- METALS - 0.85% 9,439,470 Freeport-McMoran Copper & Gold 416,280 -------------- Steel Dynamics, Inc. 200,500 TECHNOLOGY - 0.07% Tube City IMS Corporation 650,000 Unisys Corporation 190,475 U S S Holdings, Inc. 933,236 -------------- -------------- 190,475 2,200,016 -------------- -------------- TELECOMMUNICATIONS - 3.34% NATURAL RESOURCES - 0.19% Alamosa Deleware, Inc. 770,911 Appleton Papers, Inc. 308,250 Cincinnati Bell, Inc. 1,124,750 Rock-Tenn Co. 185,500 DeltaCom, Inc. 2,960,354 -------------- Hawaiian Telecom Communications 1,560,375 493,750 Jordan Telecom Products -- -------------- NTL Cable PLC 1,033,900 OIL AND GAS - 2.86% Stratos Global 613,813 Atlas Pipeline Partners 206,000 Triton P C S, Inc. 566,500 Basic Energy Services 219,375 -------------- Brigham Exploration Co. 707,000 8,630,603 Chaparral Energy, Inc. 1,507,500 -------------- Clayton Williams Energy, Inc. 752,000 TRANSPORTATION - 2.13% GulfMark Offshore, Inc. 573,475 NABCO, Inc. 1,168,750 North American Energy Partners 408,000 Quality Distribution LLC 1,317,050 Offshore Logistics, Inc. 428,625 Tangent Rail Corporation 3,007,482 Quicksilver Resources, Inc. 492,500 -------------- Tennessee Gas Pipeline Co. 534,035 5,493,282 Total Equipment & Service, Inc. 1,545,947 -------------- -------------- UTILITIES - 1.83% 7,374,457 Dynegy Holdings, Inc. 844,450 -------------- Edison Mission Energy 57,338 PHARMACEUTICALS - 1.07% Inergy LP 157,500 CorePharma LLC 2,645,242 Markwest Energy Operating Co. 751,750 Enzymatic Therapy, Inc. 106,250 N R G Energy, Inc. 179,813 -------------- Pacific Energy Partners 672,153 2,751,492 Petrohawk Energy Corporation 1,065,000 -------------- Sierra Pacific Resources 648,209 PUBLISHING/PRINTING - 1.54% Tenaska Alabama Partners LP 344,884 Idearc, Inc. 617,250 -------------- Newark Group, Inc. 886,125 4,721,097 Primedia, Inc. 1,035,000 -------------- Sheridan Acquisition Corporation 392,344 WASTE MANAGEMENT / POLLUTION - 1.58% Vertis, Inc. 1,040,300 Terra Renewal Services, Inc. 2,922,705 -------------- Waste Services, Inc. 1,152,250 3,971,019 -------------- -------------- 4,074,955 -------------- Total Corporate Restricted and Public Securities - 104.00% $ 268,315,585 ============== See Notes to Consolidated Financial Statements. ------------------------------------------------------------------------------------------------------------------------------------ 28 NOTES TO CONSOLIDATED FINANCIAL STATEMENTS MASSMUTUAL CORPORATE INVESTORS (Unaudited) 1. HISTORY MassMutual Corporate Investors (the "Trust") commenced operations in 1971 as a Delaware corporation. Pursuant to an Agreement and Plan of Reorganization dated November 14, 1985, approved by shareholders, the Trust was reorganized as a Massachusetts business trust under the laws of the Commonwealth of Massachusetts, effective November 28, 1985. The Trust is a diversified closed-end management investment company. Babson Capital Management LLC ("Babson Capital"), a wholly-owned indirect subsidiary of Massachusetts Mutual Life Insurance Company ("MassMutual"), acts as its investment adviser. The Trust's investment objective is to maintain a portfolio of securities providing a fixed yield while providing an opportunity for capital gains by investing primarily in a portfolio of privately placed below investment grade, long term corporate debt obligations with equity features, such as warrants, conversions rights, or other equity features and, occasionally, preferred stocks, purchased directly from their issuers. On January 27,1998, the Board of Trustees authorized the formation of a wholly-owned subsidiary ("MMCI Subsidiary Trust") for the purpose of holding certain investments. The results of MMCI Subsidiary Trust have been included in the accompanying consolidated financial statements. Footnote 2.D below discusses the Federal tax consequences of the MMCI Subsidiary Trust. 2. SIGNIFICANT ACCOUNTING POLICIES The following is a summary of significant accounting policies followed consistently by the Trust in the preparation of the consolidated financial statements in conformity with accounting principles generally accepted in the United States of America. A. VALUATION OF INVESTMENTS: Valuation of a security in the Trust's portfolio is made on the basis of market price whenever market quotations are readily available and all securities of the same class held by the Trust can be readily sold in such market. Nearly all securities which are acquired by the Trust directly from the issuers and shares into which such securities may be converted or which may be purchased on the exercise of warrants attached to such securities will be subject to legal or contractual delays in, or restrictions on, resale and will therefore be "restricted securities." Generally speaking, as contrasted with open-market sales of unrestricted securities which may be effected immediately if the market is adequate, absent an exemption from registration, restricted securities can be sold only in a public offering for which a registration statement is in effect under the Securities Act of 1933, as amended (the "1933 Act"). The value of restricted securities, and of any other assets for which there are no reliable market quotations, is the fair value as determined in good faith by the Trust's Board of Trustees (the "Trustees"). Each restricted security is valued by the Trustees at the time of the acquisition thereof and at least quarterly thereafter. The Trustees have established guidelines to aid in the valuation of each security. Generally, restricted securities are initially valued at cost or less at the time of acquisition by the Trust. Values greater or less than cost are used thereafter for restricted securities in appropriate circumstances. Among the factors ordinarily considered are the existence of restrictions upon the sale of the security by the Trust; an estimate of the existence and extent of a market for the security; the extent of any discount at which the security was acquired; the estimated period of time during which the security will not be freely marketable; the estimated expenses of registering or otherwise qualifying the security for public sale; estimated underwriting commissions if underwriting would be required to effect a sale; in the case of a convertible security, whether or not it would trade on the basis of its stock equivalent; in the case of a debt obligation which would trade independently of any equity equivalent, the current yields on comparable securities; the estimated amount of the floating supply of such securities available for purchase; the proportion of the issue held by the Trust; changes in the financial condition and prospects of the issuer; the existence of merger proposals or tender offers affecting the issuer; and any other factors affecting fair value, all in accordance with the Investment Company Act of 1940, as amended (the "1940 Act"). In making valuations, opinions of counsel may be relied upon as to whether or not securities are restricted securities and as to the legal requirements for public sale. When market quotations are readily available for unrestricted securities of an issuer, restricted securities of the same class are generally valued at a discount from the market price of such unrestricted securities. The Trustees, however, consider all factors in fixing any discount, including the filing of a registration statement for such securities under the 1933 Act and any other developments which are likely to increase the probability that the securities may be publicly sold by the Trust without restriction. The Trustee's meet at least once each quarter to approve the value of the Trust's portfolio securities as of the close of business on the last business day of the preceding quarter. This valuation requires the approval of a majority of the Trustees of the Trust, including a majority of the Trustees who are not interested persons of the Trust or of Babson Capital. In making valuations, the Trustees will consider reports by -------------------------------------------------------------------------------- 29 NOTES TO CONSOLIDATED FINANCIAL STATEMENTS MASSMUTUAL CORPORATE INVESTORS (CONTINUED) Babson Capital analyzing each portfolio security in accordance with the relevant factors referred to above. Babson Capital has agreed to provide such reports to the Trust at least quarterly. The consolidated financial statements include private placement restricted securities valued at $181,395,519 (70.31% of net assets) as of March 31, 2007 whose values have been estimated by the Trustees in the absence of readily ascertainable market values. Due to the inherent uncertainty of valuation, those estimated values may differ significantly from the values that would have been used had a ready market for the securities existed, and the differences could be material. The values for Rule 144A restricted securities and corporate public securities are stated at the last reported sales price or at prices based upon quotations obtained from brokers and dealers as of March 31, 2007, subject to discount where appropriate, and are approved by the Trustees. Short-term securities with more than sixty days to maturity are valued at fair value and short-term securities having a maturity of sixty days or less are valued at amortized cost which approximates market value. B. ACCOUNTING FOR INVESTMENTS: Investment transactions are accounted for on the trade date. Dividend income is recorded on the ex-dividend date. Interest income is recorded on the accrual basis, including the amortization of premiums and accretion of discounts on bonds held using the yield-to-maturity method. The Trust does not accrue income when payment is delinquent and when management believes payment is questionable. Realized gains and losses on investment transactions and unrealized appreciation and depreciation of investments are reported for financial statement and federal income tax purposes on the identified cost method. C. USE OF ESTIMATES: The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. D. FEDERAL INCOME TAXES: The Trust has elected to be taxed as a "regulated investment company" under the Internal Revenue Code and intends to maintain this qualification and to distribute substantially all of its net taxable income to its shareholders. In any year when net long-term capital gains are realized by the Trust, management, after evaluating the prevailing economic conditions, will recommend to the Trustees either to designate the net realized long-term gains as undistributed and pay the federal capital gains taxes thereon or to distribute all or a portion of such net gains. The Trust is taxed as a regulated investment company and is therefore limited as to the amount of non-qualified income that it may receive as the result of operating a trade or business, e.g. the Trust's pro rata share of income allocable to the Trust by a partnership operating company. The Trust's violation of this limitation could result in the loss of its status as a regulated investment company, thereby subjecting all of its net income and capital gains to corporate taxes prior to distribution to its shareholders. The Trust, from time-to-time, identifies investment opportunities in the securities of entities that could cause such trade or business income to be allocable to the Trust. The MMCI Subsidiary Trust (described in Footnote 1, above) was formed in order to allow investment in such securities without adversely affecting the Trust's status as a regulated investment company. The MMCI Subsidiary Trust is not taxed as a regulated investment company. Accordingly, prior to the Trust receiving any distributions from the MMCI Subsidiary Trust, all of the MMCI Subsidiary Trust's taxable income and realized gains, including non-qualified income and realized gains, is subject to taxation at prevailing corporate tax rates. For the three months ended March 31, 2007, the MMCI Subsidiary Trust has accrued income tax expense on net realized gains of $8,531 and reduced deferred income tax expenses on net unrealized gains by $219,474. In June 2006, the Financial Accounting Standards Board ("FASB") issued FASB Interpretation No. 48, Accounting for Uncertainty in Income Taxes - an interpretation of FASB statement 109 ("FIN 48"). FIN 48 supplements FASB 109 by prescribing a recognition threshold and measurement attribute for the financial statement recognition and measurement of a tax position taken or expected to be taken in a tax return. The adoption of FIN 48 requires financial statements to be adjusted to reflect only those tax positions that are more likely than not to be sustained as of the adoption date. As of March 31, 2007, the Trust has properly recorded all tax liabilities. E. DISTRIBUTIONS TO SHAREHOLDERS: The Trust records distributions to shareholders from net investment income and net realized gains, if any, on the exdividend date. The Trust's net investment income dividend is declared four times per year, in April, July, October, and -------------------------------------------------------------------------------- 30 NOTES TO CONSOLIDATED FINANCIAL STATEMENTS MASSMUTUAL CORPORATE INVESTORS (CONTINUED) December. The Trust's net realized capital gain distribution, if any, is declared in December. F. EXPENSE REDUCTION: Citibank, N.A. ("Citibank") serves as custodian to the Trust. Pursuant to the custodian agreements, Citibank receives a fee reduced by credits on cash balances the Trust maintains with Citibank. All credit balances, if any, used to reduce the Trust's custodian fees are reported as fees paid indirectly on the Statement of Operations. For the three months ended March 31, 2007, there were no credit balances used to reduce custodian fees. 3. INVESTMENT SERVICES CONTRACT A. NEW INVESTMENT SERVICES CONTRACT: An Investment Services Contract between the Trust and Babson Capital, effective October 1, 2005 (the "New Contract"), provides for a quarterly investment advisory fee of 0.3125% of the net asset value of the Trust each quarter, which is approximately equal to 1.25% annually, with no performance adjustment. The New Contract provides that for its first eighteen months, the investment advisory fee cannot exceed the amount that Babson Capital would have been paid under the prior Investment Services Contract with the Trust dated July 1, 1988 (the "Prior Contract"). B. SERVICES: Under the New Contract with the Trust, Babson Capital agrees to use its best efforts to present to the Trust a continuing and suitable investment program consistent with the investment objectives and policies of the Trust. Babson Capital represents the Trust in any negotiations with issuers, investment banking firms, securities brokers or dealers and other institutions or investors relating to the Trust's investments. Under the New Contract, Babson Capital provides administration of the day-to-day operations of the Trust and provides the Trust with office space and office equipment, accounting and bookkeeping services, and necessary executive, clerical and secretarial personnel for the performance of the foregoing services. C. PRIOR INVESTMENT SERVICES CONTRACT ADVISORY FEE: Under the Prior Contract, the Trust paid Babson Capital a quarterly base rate (the "Base Fee Rate") of 5/16 of 1% of the value of the Trust's net assets as of the end of each fiscal quarter, approximately equivalent to 1.25% of the net asset value of the Trust on an annual basis, plus or minus a quarterly performance adjustment (the "Performance Adjustment") of up to 1/16 of 1% of net asset value, approximately equivalent to plus or minus 0.25% on an annual basis. The Performance Adjustment was based on the Trust's performance as compared to a benchmark rate of return (the "Target Rate") equal to 5.0 percentage points plus an unweighted, arithmetic average of the rates of return of the Standard & Poor's Industrials Composite (formerly called the Standard & Poor's Industrial Price Index) and the Lehman Brothers Intermediate U.S. Credit Index (formerly called the Lehman Brothers Corporate Bond Index) over a rolling three-year period (the "Measurement Period") comprising the twelve quarters ending on the last day of each quarter (the "Valuation Date"). The Standard & Poor's Industrials Composite is not readily available to the public. Babson Capital obtained the information for this index from Factset Research Systems. The three-year annualized return for the Standard & Poor's Industrials Composite for the period ended March 31, 2007 was 9.73%. Under the prior contract, the Performance Adjustment was equal to 5% of the difference between the Trust's actual rate of return over the Measurement Period and the Target Rate. If the Trust's actual rate of return exceeded the Target Rate, the Base Fee Rate increased by an amount equal to the Performance Adjustment; if the Trust's actual rate of return was less than the Target Rate, the Base Fee Rate was reduced by the Performance Adjustment. Under the Prior Contract, the investment advisory fee payable by the Trust was equal to the Base Fee Rate (as adjusted by the Performance Adjustment) times the net asset value of the Trust as of the Valuation Date. Additionally, Babson Capital agreed to waive, for each quarter beginning July 1, 2004, the amount, if any, by which the investment advisory fee calculated in the manner described in the Prior Contract exceeded the sum of (i) 5/16 of 1% times the ending net asset value for that quarter plus or minus (ii) the Performance Adjustment applied against the average quarter end net assets for the Trust for the twelve-quarter period ending on such quarter. 4. SENIOR SECURED INDEBTEDNESS A. NOTE PAYABLE: MassMutual holds the Trust's $20,000,000 Senior Fixed Rate Convertible Note (the "Note") issued by the Trust in 1995. The Note, as amended, is due November 15, 2007 and accrues at 7.39% per annum. MassMutual, at its option, can convert the principal amount of the Note into common shares. The dollar amount of principal would be converted into an equivalent dollar amount of common shares based upon the average price of the common shares for ten business days prior to the notice of conversion. For the three months ended March 31, 2007, the Trust incurred total interest expense on the Note of $369,500. The Trust may redeem the Note, in whole or in part, at the principal amount proposed to be redeemed together with the accrued and unpaid interest thereon through the redemption -------------------------------------------------------------------------------- 31 NOTES TO CONSOLIDATED FINANCIAL STATEMENTS MASSMUTUAL CORPORATE INVESTORS (CONTINUED) date plus the Make Whole Premium. The Make Whole Premium equals the excess of (i) the present value of the scheduled payments of principal and interest which the Trust would have paid but for the proposed redemption, discounted at the rate of interest of U.S. Treasury obligations whose maturity approximates that of the Note plus 0.50% over (ii) the principal of the Note proposed to be redeemed. B. REVOLVING CREDIT AGREEMENT: The Trust entered into a Revolving Credit Agreement (the "Revolver") with The Royal Bank of Scotland PLC as of May 31, 2005 (the "Agent Bank"), in the principal amount of $25,000,000, maturing May 31, 2008. The Revolver bears interest payable in arrears at a per annum rate that varies depending upon whether the Trust requests a Base Rate Loan or LIBOR Rate Loan. Interest on Base Rate Loans equals the higher of: (i) the annual "Base Rate" as set periodically by the Agent Bank and (ii) the most recent Federal Funds Effective Rate plus .50% per annum. Per annum interest on LIBOR Rate Loans equals .37% plus the London Inter Bank Offered Rate ("LIBOR") rate, divided by 1 minus the LIBOR Reserve Rate. The Trust also incurs expense on the undrawn portion of the total Revolver at a rate of .15% per annum. As of March 31, 2007, there was no outstanding amount against the Revolver. For the three months ended March 31, 2007, the Trust incurred total expense on the Revolver of $9,247 related to the undrawn portion. 5. PURCHASES AND SALES OF INVESTMENTS FOR THE THREE MONTHS ENDED 3/31/2007 COST OF PROCEEDS FROM INVESTMENTS SALES OR ACQUIRED MATURITIES -------- ---------- Corporate restricted securities $17,668,491 $ 6,450,984 Corporate public securities 8,369,767 21,852,683 The aggregate cost of investments is substantially the same for financial reporting and federal income tax purposes as of March 31, 2007. The net unrealized appreciation of investments for financial reporting and federal tax purposes as of March 31, 2007 is $4,054,254 and consists of $27,948,172 appreciation and $23,893,918 depreciation. Net unrealized appreciation of investments on the Statement of Assets and Liabilities reflects the balance of a deferred tax accrual of $431,544 on net unrealized gains on the MMCI Subsidiary Trust. 6. NEW ACCOUNTING PRONOUNCEMENTS In September 2006, FASB issued Statement of Financial Accounting Standards No. 157, Fair Value Measurements ("FAS 157"). FAS 157 establishes a single authoritative definition of fair value, establishes a framework for measuring fair value and expands disclosures about fair value measurements. FAS 157 applies to fair value measurements already required or permitted by existing standards. The change to current generally accepted accounting principles from the application of FAS 157 relates to the definition of fair value, the methods used to measure fair value, and the expanded disclosures about fair value measurements. Management of the Trust does not believe the adoption of FAS 157 will materially impact the financial statement amounts, however, additional disclosures may be required about the inputs used to develop the measurements and the effect of certain of the measurements on changes in net assets for the period. FAS 157 is effective for financial statements issued for fiscal years beginning after November 15, 2007 and interim periods within those fiscal years. -------------------------------------------------------------------------------- 32 TRUSTEES OFFICERS William J. Barrett Roger W. Crandall Chairman Donald E. Benson* Clifford M. Noreen President Michael H. Brown James M. Roy Vice President & Chief Financial Officer Roger W. Crandall Rodney J. Dillman Vice President & Donald Glickman Secretary Martin T. Hart* Jill A. Fields Vice President Robert E. Joyal Michael P. Hermsen Vice President Corine T. Norgaard* Mary Wilson Kibbe Vice President Michael L. Klofas Vice President Richard E. Spencer, II Vice President * MEMBER OF THE AUDIT Ronald S. Talala Treasurer COMMITTEE John T. Davitt, Jr. Comptroller Melissa M. LaGrant Chief Compliance Officer -------------------------------------------------------------------------------- DIVIDEND REINVESTMENT AND SHARE PURCHASE PLAN MassMutual Corporate Investors offers a Dividend Reinvestment and Share Purchase Plan. The Plan provides a simple way for shareholders to add to their holdings in the Trust through the receipt of dividend shares issued by the Trust or through the reinvestment of cash dividends in Trust shares purchased in the open market. A shareholder may join the Plan by filling out and mailing an authorization card to Shareholder Financial Services, Inc., the Transfer Agent. Participating shareholders will continue to participate until they notify the Transfer Agent, in writing, of their desire to terminate participation. Unless a shareholder elects to participate in the Plan, he or she will, in effect, have elected to receive dividends and distributions in cash. Participating shareholders may also make additional contributions to the Plan from their own funds. Such contributions may be made by personal check or other means in an amount not less than $10 nor more than $5,000 per quarter. Cash contributions must be received by the Transfer Agent at least five days (but no more than 30 days) before the payment date of a dividend or distributions. Whenever the Trust declares a dividend payable in cash or shares, the Transfer Agent, acting on behalf of each participating shareholder, will take the dividend in shares only if the net asset value is lower than the market price plus an estimated brokerage commission as of the close of business on the valuation day. The valuation day is the last day preceding the day of dividend payment. When the dividend is to be taken in shares, the number of shares to be received is determined by dividing the cash dividend by the net asset value as of the close of business on the valuation date or, if greater than net asset value, 95% of the closing share price. If the net asset value of the shares is higher than the market value plus an estimated commission, the Transfer Agent, consistent with obtaining the best price and execution, will buy shares on the open market at current prices promptly after the dividend payment date. The reinvestment of dividends does not, in any way, relieve participating shareholders of any federal, state or local tax. For federal income tax purposes, the amount reportable in respect of a dividend received in newly-issued shares of the Trust will be the fair market value of the shares received, which will be reportable as ordinary income and/or capital gains. As compensation for its services, the Transfer Agent receives a fee of 5% of any dividend and cash contribution (in no event in excess of $2.50 per distribution per shareholder.) Any questions regarding the Plan should be addressed to Shareholder Financial Services, Inc., Agent for MassMutual Corporate Investors' Dividend Reinvestment and Share Purchase Plan, P.O. Box 173673, Denver CO 80217-3673. [LOGO] MassMutual Corporate Investors DB1039 407