MassMutual Corporate Investors Report for the Three Months Ended March 31, 2008 [LOGO] ADVISER Babson Capital Management LLC 1500 Main Street, P.O. 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 MassMutual Corporate Investors c/o Babson Capital Management LLC [LOGO] 1500 Main Street, Suite 600 Springfield, Massachusetts 01115 (413) 226-1516 -------------------------------------------------------------------------------- INVESTMENT OBJECTIVE AND POLICY MassMutual Corporate Investors (the "Trust") is a closedend 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 "MassMuInv" under either the New York Stock Exchange listings or Closed-End Fund Listings. The Trust's investment objective is to maintain a portfolio of securities providing a fixed yield and at the same time offering an opportunity for capital gains. The Trust's principal investments are privately placed, below-investment grade, long-term debt obligations with equity features such as common stock, 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 in private placement transactions. These investments are typically mezzanine debt instruments with accompanying private equity securities made to small or middle market 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. Below investment grade or high yield securities have predominantly speculative characteristics with respect to the capacity of the issuer to pay interest and repay principal. 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 MassMutual Corporate Investors files its complete schedule of portfolio holdings with the U.S. Securities and Exchange Commission for the first and third quarters of each fiscal year on Form N-Q. This information is available (i) on the U.S. Securities and Exchange Commission's website at http:// www.sec.gov; and (ii) at the U.S. Securities and Exchange Commission'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 MassMutual Corporate Investors have delegated proxy voting responsibilities relating to the voting of securities held by the Trust to Babson Capital Management LLC. A description of Babson Capital's proxy voting policies and procedures is available (1) without charge, upon request, by calling, tollfree 866-399-1516; (2) on MassMutual Corporate Investors' website: http:// www.babsoncapital.com/mci; and (3) on the U.S. Securities and Exchange Commission ("SEC") website at 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 MassMutual Corporate Investors' website: http://www. babsoncapital.com/mci; and (2) on the SEC's website at http://www.sec.gov. MCI Listed NYSE TO OUR SHAREHOLDERS April 30, 2008 We are pleased to present the March 31, 2008 Quarterly Report of MassMutual Corporate Investors (the "Trust"). The Board of Trustees declared a quarterly dividend of 54 cents per share, payable on May 16, 2008 to shareholders of record on May 5, 2008. The Trust had previously paid a 54 cent per share dividend for the preceding quarter (plus a special year-end dividend of 43 cents per share). U.S. equity markets, as approximated by the Russell 2000 Index, decreased 9.90% for the quarter. U.S. fixed income markets, as approximated by the Lehman Brothers U.S. Corporate High Yield Index decreased 3.02% for the quarter. In the last several months, the mezzanine and private equity markets have been affected by the credit dislocation that occurred in 2007. Overall, deal volumes have decreased significantly as credit is generally less available to fund transactions. However, some weaker participants have left the mezzanine market, causing competition to be a bit less stringent. As a result, investments being made in the current market are structured and priced more favorably than they have been in some time. During the quarter, the Trust made private placement investments in five new issuers and one "follow-on" investment, totaling approximately $11.4 million. The follow-on investment purchased by the Trust was Smart Source Holdings LLC. The five new issuers were E S P Holdco, Inc., Power Services Holding Company, R E I Delaware Holding, Inc., T H I Acquisition, Inc. and U M A Enterprises, Inc. The weighted average coupon of these investments was 12.81%. (A brief description of these investments can be found in the Consolidated Schedule of Investments.) During the quarter ended March 31, 2008, net assets of the Trust decreased to $250,007,524 or $26.96 per share compared to $251,163,022 or $27.19 per share on December 31, 2007, which translates into a -0.85% total 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 5.40%, 16.93%, 12.19%, and 14.85% 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 56 cents per share of net investment income for the quarter, compared to 59 cents per share in the previous quarter. During the quarter ended March 31, 2008, the market price of the Trust decreased 6.4% from $30.20 per share to $28.27 per share. The Trust's market price of $28.27 per share equates to a 4.86% premium over the March 31, 2008 net asset value per share. The Trust's average quarter-end premium for the 3, 5 and 10-year periods was 14.5%, 10.9% and 6.3%, respectively. Thank you for your continued interest in and support of MassMutual Corporate Investors. Sincerely, /s/ Clifford M. Noreen Clifford M. Noreen President -------------------------------------------------------------------------------- PORTFOLIO COMPOSITION AS OF 3/31/08 * [PIE CHART APPEARS HERE] Private / Restricted Equity Public Equity 14.2% 1.8% Cash & Short Term Investments Private / 144A High Yield Debt 9.6% 52.0% Public High Yield Debt Private Investment Grade Debt 21.7% 0.7% -------------------------------------------------------------------------------- *Based on market value of total investments -------------------------------------------------------------------------------- 1 CONSOLIDATED STATEMENT OF ASSETS AND LIABILITIES March 31, 2008 (unaudited) ASSETS: Investments (See Consolidated Schedule of Investments) Corporate restricted securities at fair value (Cost - $189,890,549) $ 185,970,978 Corporate public securities at market value (Cost - $70,008,213) 65,358,035 Short-term securities at amortized cost 26,020,649 ------------- 277,349,662 Cash 511,604 Interest and dividends receivable 6,379,213 Receivable for investments sold 57,999 Other assets 19,022 ------------- TOTAL ASSETS 284,317,500 ------------- LIABILITIES: Payable for investments purchased 3,130,218 Investment advisory fee payable 781,274 Note payable 30,000,000 Interest payable 202,130 Accrued expenses 190,854 Accrued taxes payable 5,500 ------------- TOTAL LIABILITIES 34,309,976 ------------- TOTAL NET ASSETS $ 250,007,524 ============= NET ASSETS: Common shares, par value $1.00 per share; an unlimited number authorized $ 9,274,012 Additional paid-in capital 111,823,298 Retained net realized gain on investments, prior years 128,547,813 Undistributed net investment income 6,973,930 Accumulated net realized gain on investments 1,958,220 Net unrealized depreciation of investments (8,569,749) ------------- TOTAL NET ASSETS $ 250,007,524 ============= COMMON SHARES ISSUED AND OUTSTANDING 9,274,012 ============= NET ASSET VALUE PER SHARE $ 26.96 ============= See Notes to Consolidated Financial Statements -------------------------------------------------------------------------------- 2 CONSOLIDATED STATEMENT OF OPERATIONS For the three months ended March 31, 2008 (unaudited) Investment Income: Interest $ 6,475,082 Dividends 26,415 Other 50,185 ------------- TOTAL INVESTMENT INCOME 6,551,682 ------------- EXPENSES: Investment advisory fees 781,274 Interest 405,349 Trustees' fees and expenses 54,600 Professional fees 40,300 Reports to shareholders 37,500 Custodian fees 7,500 Transfer agent/registrar's expenses 9,000 Other 7,448 ------------- TOTAL EXPENSES 1,342,971 ------------- INVESTMENT INCOME - NET 5,208,711 ------------- NET REALIZED AND UNREALIZED GAIN (LOSS) ON INVESTMENTS: Net realized gain on investments before taxes 2,165,932 Income tax expense (69,386) ------------- Net realized gain on investments 2,096,546 Net change in unrealized appreciation of investments (9,506,330) ------------- NET LOSS ON INVESTMENTS (7,409,784) ------------- NET DECREASE IN NET ASSETS RESULTING FROM OPERATIONS $ (2,201,073) ============= See Notes to Consolidated Financial Statements MassMutual Corporate Investors -------------------------------------------------------------------------------- 3 CONSOLIDATED STATEMENTS OF CASH FLOWS For the three months ended March 31, 2008 (unaudited) NET DECREASE IN CASH: Cash flows from operating activities: Purchases/Proceeds/Maturities from short-term portfolio securities, net $ (6,238,417) Purchase of portfolio securities (20,930,111) Proceeds from disposition of portfolio securities 31,542,885 Interest, dividends, and other received 5,884,421 Interest expense paid (414,776) Operating expenses paid (888,955) Income taxes paid (1,196,987) ------------- NET CASH PROVIDED BY OPERATING ACTIVITIES 7,758,060 ------------- Cash flows from financing activities: Cash dividends paid from net investment income (8,960,490) Receipts for shares issued on reinvestment of dividends 1,045,575 ------------- NET CASH USED FOR FINANCING ACTIVITIES (7,914,915) ------------- NET DECREASE IN CASH (156,855) Cash - beginning of year 668,459 ------------- CASH - END OF PERIOD $ 511,604 ============= RECONCILIATION OF NET DECREASE IN NET ASSETS TO NET CASH PROVIDED BY OPERATING ACTIVITIES: NET DECREASE IN NET ASSETS RESULTING FROM OPERATIONS $ (2,201,073) ------------- Decrease in investments 6,801,571 Increase in interest and dividends receivable (324,038) Decrease in receivable for investments sold 1,477,786 Increase in other assets (19,022) Increase in payable for investments purchased 3,130,218 Decrease in investment advisory fee payable (3,610) Decrease in interest payable (9,427) Increase in accrued expenses 34,986 Decrease in accrued taxes payable (1,127,601) Decrease in other payables (1,730) ------------- TOTAL ADJUSTMENTS TO NET ASSETS FROM OPERATIONS 9,959,133 ------------- NET CASH PROVIDED BY OPERATING ACTIVITIES $ 7,758,060 ============= See Notes to Consolidated Financial Statements -------------------------------------------------------------------------------- 4 CONSOLIDATED STATEMENTS OF CHANGES IN NET ASSETS For the three months ended For the 03/31/08 year ended (Unaudited) 12/31/07 ------------- ------------- DECREASE IN NET ASSETS: Operations: Investment income - net $ 5,208,711 $ 23,586,915 Net realized gain on investments 2,096,546 1,411,465 Net change in unrealized appreciation of investments (9,506,330) (4,596,952) ------------- ------------- Net decrease (increase) in net assets resulting from operations (2,201,073) 20,401,428 Increase from common shares issued on reinvestment of dividends Common shares issued (2008 - 36,393; 2007 - 87,700) 1,045,575 2,751,359 Dividends to shareholders from: Net investment income (2007 - $2.57 per share) -- (23,679,411) ------------- ------------- TOTAL DECREASE IN NET ASSETS (1,155,498) (526,624) NET ASSETS, BEGINNING OF YEAR 251,163,022 251,689,646 ------------- ------------- NET ASSETS, END OF PERIOD/YEAR (including undistributed net investment income of $6,973,930 and $1,765,219, respectively) $ 250,007,524 $ 251,163,022 ============= ============= See Notes to Consolidated Financial Statements MassMutual Corporate Investors -------------------------------------------------------------------------------------------------------- 5 CONSOLIDATED SELECTED FINANCIAL HIGHLIGHTS SELECTED DATA FOR EACH SHARE OF BENEFICIAL INTEREST OUTSTANDING: For the three months For the years ended December 31, ended 03/31/2008 --------------------------------------------------- (Unaudited) 2007 2006 2005 2004 2003 ----------- ---- ---- ---- ---- ---- Net asset value: Beginning of year $ 27.19 $ 27.51 $ 26.06 $ 24.34 $ 21.84 $ 19.40 ------- ------- ------- ------- ------- ------- Net investment income (a) 0.56 2.56 2.27 2.03 2.00 1.44 Net realized and unrealized gain (loss) on investments (0.80) (0.35) 1.62 1.96(b) 2.64 2.83 ------- ------- ------- ------- ------- ------- Total from investment operations (0.24) 2.21 3.89 3.99 4.64 4.27 ------- ------- ------- ------- ------- ------- Dividends from net investment income to common shareholders -- (2.57) (2.47) (2.11) (2.16) (1.84) Dividends from net realized gain on investments to common shareholders -- -- (0.01) (0.18) -- -- Increase from dividends reinvested 0.01 0.04 0.04 0.02 0.02 0.01 ------- ------- ------- ------- ------- ------- Total dividends 0.01 (2.53) (2.44) (2.27) (2.14) (1.83) ------- ------- ------- ------- ------- ------- Net asset value: End of period/year $ 26.96 $ 27.19 $ 27.51 $ 26.06 $ 24.34 $ 21.84 ------- ------- ------- ------- ------- ------- Per share market value: End of period/year $ 28.27 $ 30.20 $ 34.89 $ 30.05 $ 28.50 $ 22.90 ======= ======= ======= ======= ======= ======= Total investment return: Market value (6.39)% (8.78)% 29.04% 16.95% 36.10% 27.53% Net asset value (c) (0.85)% 8.58% 18.09% 20.04% 22.76% 22.61% Net assets (in millions): End of period/year $250.01 $251.16 $251.69 $236.28 $218.51 $193.79 Ratio of operating expenses to average net assets 1.51%(d) 1.55% 1.43% 1.78% 1.93% 2.04% Ratio of interest expense to average net assets 0.65%(d) 0.59% 0.60% 0.73% 0.77% 0.82% Ratio of income tax expense to average net assets (e) 0.11%(d) 0.35% 2.46% 2.84% 0.69% -- Ratio of total expenses before custodian reduction to average net assets (e) 2.27%(d) 2.49% 4.53% 5.36% 3.39% 2.86% Ratio of net expenses after custodian reduction to average net assets (e) 2.27%(d) 2.49% 4.49% 5.35% 3.39% 2.86% Ratio of net investment income to average net assets 8.39%(d) 9.17% 8.19% 7.98% 8.68% 6.95% Portfolio turnover 9% 44% 35% 35% 53% 56% (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. (e) As additional information, this ratio is included to reflect the taxes paid on retained long-term gains. These taxes paid are netted against realized capital gains in the Statement of Operations. The taxes paid are treated as deemed distributions and a credit for the taxes paid is passed on to the shareholders. Senior securities: Total principal amount (in millions) $ 30 $ 30 $ 20 $ 20 $ 29 $ 20 Asset coverage per $1,000 of indebtedness $ 9,334 $ 9,372 $ 13,584 $ 12,814 $ 8,535 $ 10,689 See Notes to Consolidated Financial Statements ------------------------------------------------------------------------------------------------------------------------------------ 6 CONSOLIDATED SCHEDULE OF INVESTMENTS March 31, 2008 (unaudited) Principal Amount Shares, Units or Ownership Acquisition CORPORATE RESTRICTED SECURITIES - 74.39%:(A) Percentage Date Cost Fair Value ------------ -------- ------------ ------------ PRIVATE PLACEMENT INVESTMENTS -70.89% A H C HOLDING COMPANY, INC. A designer and manufacturer of boilers and water heaters for the commercial sector. 15% Senior Subordinated Note due 2015 $ 2,332,956 11/21/07 $ 2,286,403 $ 2,279,705 Limited Partnership Interest (B) 14.99% int. 11/21/07 224,795 213,560 ------------ ------------ 2,511,198 2,493,265 ------------ ------------ 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 2,125,000 Warrant, exercisable until 2012, to purchase preferred stock at $.01 per share (B) 13 shs. 11/16/07 -- 16,966 Warrant, exercisable until 2012, to purchase common stock at $.02 per share (B) 2,323 shs. 04/08/04 -- 24,959 ------------ ------------ 2,125,000 2,166,925 ------------ ------------ ADVANCED TECHNOLOGIES HOLDINGS A provider of factory maintence services to industrial companies. 15% Senior Subordinated Note due 2013 $ 2,040,000 12/27/07 1,999,200 2,011,825 Preferred Stock (B) 1,031 shs. 12/27/07 510,000 484,499 ------------ ------------ 2,509,200 2,496,324 ------------ ------------ 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 1,598,918 14% Senior Subordinated Note due 2015 $ 1,260,000 03/09/07 1,132,664 1,234,172 Common Stock (B) 262,500 shs. 03/09/07 262,500 613,865 Warrant, exercisable until 2015, to purchase common stock at $.01 per share (B) 66,116 shs. 03/09/07 111,527 154,615 ------------ ------------ 3,109,779 3,601,570 ------------ ------------ 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 1,985,547 2,008,549 Preferred Class A Unit (B) 3,223 uts. * 322,300 -- Common Class B Unit (B) 30,420 uts. 01/22/04 1 -- Common Class D Unit (B) 6,980 uts. 09/12/06 1 -- ------------ ------------ 2,307,849 2,008,549 ------------ ------------ * 01/22/04 and 09/12/06. Massmutual Corporate Investors -------------------------------------------------------------------------------------------------------------------------------- 7 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONTINUED) March 31, 2008 (Unaudited) Principal Amount Shares, Units or Ownership Acquisition CORPORATE RESTRICTED SECURITIES:(A)(Continued) Percentage Date Cost Fair Value ------------ -------- ------------ ------------ 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 $ 1,549,429 $ 1,540,944 Common Stock (B) 497 shs. 05/18/05 497,340 74,041 Warrant, exercisable until 2012, to purchase common stock at $.01 per share (B) 130 shs. 05/18/05 112,128 19,410 ------------ ------------ 2,158,897 1,634,395 ------------ ------------ 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 2,156,591 2,320,868 Preferred Stock Class A (B) 879 shs. 06/30/06 268,121 248,980 Common Stock (B) 1 sh. 06/30/06 286 23,913 Warrant, exercisable until 2014, to purchase common stock at $.01 per share (B) 309 shs. 06/30/06 92,102 87,503 ------------ ------------ 2,517,100 2,681,264 ------------ ------------ 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. * 503 558,932 ------------ ------------ COEUR, INC. A producer of proprietary, disposable power injection syringes. 8.75% Senior Secured Term Note due 2010 $ 355,072 04/30/03 355,072 356,635 11.5% Senior Subordinated Note due 2011 $ 424,818 04/30/03 403,862 422,025 Common Stock (B) 126,812 shs. 04/30/03 126,812 365,028 Warrant, exercisable until 2010, to purchase common stock at $.01 per share (B) 87,672 shs. 04/30/03 40,804 252,364 ------------ ------------ 926,550 1,396,052 ------------ ------------ * 12/30/97and 05/29/99 -------------------------------------------------------------------------------------------------------------------------------- 8 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONTINUED) March 31, 2008 (Unaudited) Principal Amount Shares, Units or Ownership Acquisition CORPORATE RESTRICTED SECURITIES:(A)(Continued) Percentage Date Cost Fair Value ------------ -------- ------------ ------------ 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 $ 2,161,222 Limited Liability Company Unit Class A (B) 156,046 uts. 01/12/07 156,046 65,446 Limited Liability Company Unit Class C (B) 112,873 uts. 01/12/07 112,873 47,339 ------------ ------------ 2,502,121 2,274,007 ------------ ------------ CONNOR SPORT COURT INTERNATIONAL, INC. A designer and manufacturer of outdoor and indoor synthetic sports flooring and other temporary flooring products. Preferred Stock Series B-2 (B) 17,152 shs. 07/05/07 700,392 700,393 Preferred Stock Series C (B) 8,986 shs. 07/05/07 300,168 300,168 Common Stock (B) 718 shs. 07/05/07 7 7 Limited Partnership Interest (B) 7.74% int. * 189,586 -- ------------ ------------ 1,190,153 1,000,568 ------------ ------------ 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 2,109,357 2,197,365 Common Stock (B) 509 shs. ** 526,096 1,730,776 Warrant, exercisable until 2013, to purchase common stock at $.01 per share (B) 103 shs. 06/15/05 100,668 350,061 ------------ ------------ 2,736,121 4,278,202 ------------ ------------ 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 2,440,917 2,532,952 Warrant, exercisable until 2013, to purchase common stock at $.001 per share (B) 20 shs. 08/04/05 137,166 103,424 ------------ ------------ 2,578,083 2,636,376 ------------ ------------ * 08/12/04 and 01/14/05. ** 06/15/05 and 05/22/06. Massmutual Corporate Investors -------------------------------------------------------------------------------------------------------------------------------- 9 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONTINUED) March 31, 2008 (Unaudited) Principal Amount Shares, Units or Ownership Acquisition CORPORATE RESTRICTED SECURITIES:(A)(Continued) Percentage Date Cost Fair Value ------------ -------- ------------ ------------ DAVIS-STANDARD LLC A manufacturer, assembler, and installer of a broad range of capital equipment that is used in the extrusion, conversion, and processing of plastic materials. 12% Senior Subordinated Note due 2014 $ 1,847,826 10/30/06 $ 1,737,202 $ 1,901,661 Limited Partnership Interest (B) 1.82% int. 10/30/06 702,174 1,151,599 Warrant, exercisable until 2014, to purchase preferred stock at $.01 per share (B) 50 shs. 10/30/06 49,830 54,813 Warrant, exercisable until 2014, to purchase common stock at $.01 per share (B) 34 shs. 10/30/06 34,000 111,225 ------------ ------------ 2,523,206 3,219,298 ------------ ------------ DIRECTED ELECTRONICS, INC. A designer and distributor of brand name automotive security systems, audio products and installation accessories. Common Stock (B) (E) 368,560 shs. * 1,856,534 770,290 ------------ ------------ 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) 27.20% int. 08/27/98 734,090 -- Preferred Stock (B) 3,278 shs. 12/14/01 2,784,133 778,527 Warrants, exercisable until 2011, to purchase common stock of DHI Holdings, Inc. at $.01 per share (B) 13,352 shs. ** 403,427 -- ------------ ------------ 3,921,650 778,527 ------------ ------------ DUNCAN SYSTEMS, INC. A distributor of windshields and side glass for the recreational vehicle market. 10% Senior Secured Term Note due 2013 $ 540,000 11/01/06 531,900 530,855 13% Senior Subordinated Note due 2014 $ 855,000 11/01/06 768,229 836,937 Common Stock (B) 180,000 shs 11/01/06 180,000 237,651 Warrant, exercisable until 2014, to purchase common stock at $.01 per share (B) 56,514 shs. 11/01/06 78,160 74,614 ------------ ------------ 1,558,289 1,680,057 ------------ ------------ * 12/19/05 and 06/17/06 ** 10/24/96 and 8/28/98. -------------------------------------------------------------------------------------------------------------------------------- 10 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONTINUED) March 31, 2008 (Unaudited) Principal Amount Shares, Units or Ownership Acquisition CORPORATE RESTRICTED SECURITIES:(A)(Continued) Percentage Date Cost Fair Value ------------ -------- ------------ ------------ DWYER GROUP, INC. A franchiser of a variety of home repair services. Common Stock (B) 6,906 shs. * $ 690,600 $ 1,060,723 Warrant, exercisable until 2011, to purchase common stock at $.01 per share (B) 2,034 shs. 10/30/03 186,469 312,348 ------------ ------------ 877,069 1,373,071 ------------ ------------ E S P HOLDCO, INC. A manufacturer of power protection technology for commercial office equipment, primarily supplying the office equipment dealer network. 14% Senior Subordinated Note due 2015 $ 2,220,010 01/08/08 2,181,160 2,204,624 Common Stock (B) 660 shs. 01/08/08 329,990 313,500 ------------ ------------ 2,511,150 2,518,124 ------------ ------------ 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 77,208 166,250 ------------ ------------ ELECTRA BICYCLE COMPANY LLC A designer and marketer of branded leisure bicycles. 10.5% Senior Secured Term Note A due 2009 $ 127,531 04/12/07 124,980 126,859 10.5% Senior Secured Term Note B due 2012 $ 688,664 04/12/07 677,590 681,023 12% Senior Secured Term Note C due 2012 $ 510,121 04/12/07 474,967 499,725 Limited Liability Company Unit Series F 64,597 uts. 04/12/07 64,597 61,367 Limited Liability Company Unit Series G (B) 4,990 uts. 04/12/07 4,990 4,741 ------------ ------------ 1,347,124 1,373,715 ------------ ------------ ENZYMATIC THERAPY, INC. A manufacturer and distributor of branded natural medicines and nutritional supplements. Limited Partnership Interest (B) 1.32% int. 03/30/00 531,250 286,660 Warrant, exercisable until 2009, to purchase common stock at $.01 per share (B) 29,117 shs. 03/30/00 255,000 179,918 ------------ ------------ 786,250 466,578 ------------ ------------ EVANS CONSOLES, INC. A designer and manufacturer of consoles and control center systems. Common Stock (B) 90,000 shs. 05/06/04 6 1,301,310 ------------ ------------ * 10/30/03 and 01/02/04. Massmutual Corporate Investors -------------------------------------------------------------------------------------------------------------------------------- 11 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONTINUED) March 31, 2008 (Unaudited) Principal Amount Shares, Units or Ownership Acquisition CORPORATE RESTRICTED SECURITIES:(A)(Continued) Percentage Date Cost Fair Value ------------ -------- ------------ ------------ 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 $ 2,239,832 $ 2,369,541 Preferred Unit (B) 158 uts. 06/01/06 159,362 173,427 Common Unit Class B (B) 1,386 uts. 06/01/06 122,361 112,088 ------------ ------------ 2,521,555 2,655,056 ------------ ------------ 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 04/13/06 904,609 904,249 14% Senior Subordinated Note due 2014 $ 555,059 04/13/06 502,765 546,947 Common Stock (B) 109,436 shs. 04/13/06 109,436 14,660 Warrant, exercisable until 2014, to purchase common stock at $.01 per share (B) 30,940 shs. 04/13/06 48,433 4,145 ------------ ------------ 1,565,243 1,470,001 ------------ ------------ 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 2,166,162 2,174,897 Common Stock (B) 185 shs. 02/03/06 184,783 49,194 Warrant, exercisable until 2013, to purchase common stock at $.01 per share (B) 254 shs. 02/03/06 208,435 67,671 ------------ ------------ 2,559,380 2,291,762 ------------ ------------ 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 2,192,339 2,137,849 Common Stock (B) 212,500 shs. 01/31/06 212,500 -- Warrant, exercisable until 2016, to purchase common stock at $.01 per share (B) 138,408 shs. 01/31/06 119,213 -- ------------ ------------ 2,524,052 2,137,849 ------------ ------------ GOLDEN COUNTY FOODS HOLDING, INC. A manufacturer of frozen appetizers and snacks. 12% Senior Subordinated Note due 2015 $ 1,912,500 11/01/07 1,727,592 1,864,662 8% Series A Convertible Preferred Stock, convertible into 4.25% of the fully dilluted common shares (B) 146,658 shs. 11/01/07 146,658 139,325 ------------ ------------ 1,874,250 2,003,987 ------------ ------------ -------------------------------------------------------------------------------------------------------------------------------- 12 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONTINUED) March 31, 2008 (Unaudited) Principal Amount Shares, Units or Ownership Acquisition CORPORATE RESTRICTED SECURITIES:(A)(Continued) Percentage Date Cost Fair Value ------------ -------- ------------ ------------ H M HOLDING COMPANY A designer, manufacturer, and importer of promotional and wood furniture. 12% Senior Subordinated Note due 2013 (D) $ 2,210,000 02/10/06 $ 2,048,925 $ -- Preferred Stock (B) 20 shs. 09/18/07 20,238 -- Common Stock (B) 340 shs. 02/10/06 340,000 -- Warrant, exercisable until 2013, to purchase common stock at $.02 per share (B) 126 shs. 02/10/06 116,875 -- ------------ ------------ 2,526,038 -- ------------ ------------ HIGHGATE CAPITAL LLC An acquirer of controlling or substantial interests in manufacturing and marketing entities. Series A Preferred Units (B) 1.19% int. 7/21/94 367,440 -- ------------ ------------ 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 * 1,898,991 2,026,882 Common Stock (B) 63 shs. * 62,742 81,488 Warrant, exercisable until 2012, to purchase common stock at $.02 per share (B) 200 shs. * 199,501 259,114 ------------ ------------ 2,161,234 2,367,484 ------------ ------------ INSURANCE CLAIMS MANAGEMENT, INC. A third party administrator providing auto and property claim administration services for insurance companies. Common Stock (B) 69 shs. 02/27/07 2,077 42,172 Warrant, exercisable until 2011, to purchase common stock at $.01 per share 20 shs. 02/27/07 612 12,421 ------------ ------------ 2,689 54,593 ------------ ------------ INTEGRATION TECHNOLOGY SYSTEMS, INC. A manufacturer of steel protective computer and network systems for the industrial and office environments. 12% Senior Secured Note due on demand (D) $ 43,943 03/01/04 1 -- Common Stock (B) 228 shs. 06/01/00 262,200 -- ------------ ------------ 262,201 -- ------------ ------------ * 06/30/04 and 08/19/04. Massmutual Corporate Investors -------------------------------------------------------------------------------------------------------------------------------- 13 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONTINUED) March 31, 2008 (Unaudited) Principal Amount Shares, Units or Ownership Acquisition CORPORATE RESTRICTED SECURITIES:(A)(Continued) Percentage Date Cost Fair Value ------------ -------- ------------ ------------ JASON, INC. A diversified manufacturing company serving various industrial markets. 13% Senior Subordinated Note due 2010 $ 963,687 08/04/00 $ 916,389 $ 940,920 Limited Partnership Interest of Saw Mill Capital Fund II, L.P. (B) 2.50% int. 08/03/00 886,352 591,737 Warrant, exercisable until 2010, to purchase common stock at $.01 per share (B) 50,870 shs. 08/04/00 115,412 118,837 ------------ ------------ 1,918,153 1,651,494 ------------ ------------ JUSTRITE MANUFACTURING AQUISITION CO. A manufacturer of safety products such as storage cabinets and containers. 12% Senior Subordinated Note due 2011 $ 1,593,750 12/15/04 1,526,535 1,594,221 Warrant, exercisable until 2011, to purchase common stock at $.01 per share (B) 1,121 shs. 12/15/04 101,109 261,135 ------------ ------------ 1,627,644 1,855,356 ------------ ------------ K H O F HOLDINGS, INC. A manufacturer of premium disposable tableware products serving both the foodservice and consumer channels. 14% Senior Subordinated Note due 2014 $ 2,339,162 10/15/07 2,292,583 2,305,871 Common Stock (B) 220,673 shs. 10/15/07 220,673 209,639 ------------ ------------ 2,513,256 2,515,510 ------------ ------------ K N B HOLDINGS CORPORATION A designer, manufacturer and marketer of products for the custom framing market. 13.5% Senior Subordinated Note due 2013 $ 2,474,363 05/25/06 2,367,280 2,464,505 Common Stock (B) 134,210 shs. 05/25/06 134,210 137,378 Warrant, exercisable until 2013, to purchase common stock at $.01 per share (B) 82,357 shs. 05/25/06 71,534 84,301 ------------ ------------ 2,573,024 2,686,184 ------------ ------------ 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 2,125,557 2,240,423 Common Stock (B) 232 shs. 03/13/07 232,000 160,543 Warrant, exercisable until 2017, to purchase common stock at $.01 per share (B) 167 shs. 03/14/07 162,260 115,563 ------------ ------------ 2,519,817 2,516,529 ------------ ------------ -------------------------------------------------------------------------------------------------------------------------------- 14 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONTINUED) March 31, 2008 (Unaudited) Principal Amount Shares, Units or Ownership Acquisition CORPORATE RESTRICTED SECURITIES:(A)(Continued) Percentage Date Cost Fair Value ------------ -------- ------------ ------------ K-TEK HOLDING CORPORATION A manufacturer of instrumentation for liquid and bulk solids level detection for process and storage tanks. 14% Senior Secured Note due 2015 $ 2,185,714 12/20/07 $ 2,146,371 $ 2,132,841 Preferred Stock (B) 363,260 shs. 12/20/07 363,260 345,097 Common Stock (B) 102,616 shs. 12/20/07 1,026 1,026 ------------ ------------ 2,510,657 2,478,964 ------------ ------------ 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 $ 1,062,500 04/05/06 995,058 1,062,500 13% Preferred Stock (B) 565 shs. 04/05/06 565,335 721,926 Common Stock (B) 125 shs. 04/05/06 125,048 910,114 Warrant, exercisable until 2014, to purchase common stock at $.01 per share (B) 13 shs. 04/05/06 12,905 93,886 ------------ ------------ 1,698,346 2,788,426 ------------ ------------ MAIL COMMUNICATIONS GROUP, INC. A provider of mail processing and handling services, lettershop services, and commercial printing services. 12.5% Senior Subordinated Note due 2014 $ 975,000 05/04/07 912,469 945,436 Limited Liability Company Unit (B) 24,109 uts. * 314,464 298,741 Warrant, exercisable until 2014, to purchase common stock at $.01 per share (B) 3,375 shs. 05/04/07 43,031 34 ------------ ------------ 1,269,964 1,244,211 ------------ ------------ MAVERICK ACQUISITION COMPANY A manufacturer of capsules that cover the cork and neck of wine bottles. 9.2% Senior Secured Tranche A Note due 2010 (C) $ 452,774 09/03/04 452,774 445,964 12% Senior Secured Tranche B Note due 2011 $ 313,433 09/03/04 288,858 297,322 Limited Partnership Interest (B) 7.84% int. 09/03/04 58,769 33,680 Warrant, exercisable until 2011, to purchase common stock at $.01 per share (B) 425 shs. 09/03/04 39,473 24,335 ------------ ------------ 839,874 801,301 ------------ ------------ * 05/04/07 and 01/02/08. Massmutual Corporate Investors -------------------------------------------------------------------------------------------------------------------------------- 15 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONTINUED) March 31, 2008 (Unaudited) Principal Amount Shares, Units or Ownership Acquisition CORPORATE RESTRICTED SECURITIES:(A)(Continued) Percentage Date Cost Fair Value ------------ -------- ------------ ------------ 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 * $ 2,545,658 $ 2,646,021 Common Stock (B) 450 shs. * 450,000 424,219 Warrant, exercisable until 2013, to purchase common stock at $.02 per share (B) 164 shs. * 162,974 154,585 ------------ ------------ 3,158,632 3,224,825 ------------ ------------ 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 1,051,667 1,179,607 Limited Partnership Interest (B) 21.23% int. 08/04/06 106,153 181,930 Warrant, exercisable until 2014, to purchase common stock at $.02 per share (B) 1,107 shs. 08/04/06 107,109 189,640 ------------ ------------ 1,264,929 1,551,177 ------------ ------------ 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 2,381,633 2,295,000 Warrant, exercisable until 2014, to purchase common stock at $.02 per share (B) 152 shs. 03/31/06 138,125 -- ------------ ------------ 2,519,758 2,295,000 ------------ ------------ MORTON INDUSTRIAL GROUP, INC. A manufacturer of highly engineered metal fabricated components. 12% Senior Subordinated Note due 2014 $ 2,440,909 08/25/06 2,260,057 2,196,818 30% Series A Preferred Stock (B) 17,051 shs. 03/03/08 17,051 -- Common Stock (B) 109,091 shs. 08/25/06 109,091 -- Warrant, exercisable until 2014, to purchase common stock at $.02 per share (B) 173,633 shs. 08/25/06 149,940 -- ------------ ------------ 2,536,139 2,196,818 ------------ ------------ MOSS, INC. A manufacturer and distributor of large display and exhibit structures. Limited Partnership Interest of Riverside Capital Appreciation Fund I, L.P. (B) 37.37% int. ** 348,620 690,470 Warrant, exercisable until 2010, to purchase common stock at $.01 per share (B) 214 shs. 12/21/05 36,647 42,390 ------------ ------------ 385,267 732,860 ------------ ------------ * 08/12/05 and 09/11/06. ** 09/20/00, 05/23/02 and 02/21/07. -------------------------------------------------------------------------------------------------------------------------------- 16 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONTINUED) March 31, 2008 (Unaudited) Principal Amount Shares, Units or Ownership Acquisition CORPORATE RESTRICTED SECURITIES:(A)(Continued) Percentage Date Cost Fair Value ------------ -------- ------------ ------------ NABCO, INC. A producer of explosive containment vessels in the United States. 14% Senior Subordinated Note due 2014 $ 712,219 02/24/06 $ 640,839 $ 356,109 Limited Liability Company Unit (B) 825 uts. * 825,410 -- Warrant, exercisable until 2016, to purchase common stock at $.01 per share (B) 48 shs. 02/24/06 37,188 -- ------------ ------------ 1,503,437 356,109 ------------ ------------ 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 1,140,645 1,178,314 8.75% Senior Secured Note due 2011 $ 573,025 05/28/04 573,028 563,178 Common Stock (B) 674,157 shs. 05/28/04 674,157 -- Warrant, exercisable until 2012, to purchase common stock at $.01 per share (B) 203,912 shs. 05/28/04 130,789 -- ------------ ------------ 2,518,619 1,741,492 ------------ ------------ NESCO HOLDINGS CORPORATION A sales and leasing company that provides equipment to the electric utility, telecommunications, and various other industries. 12% Senior Subordinated Note due 2015 $ 2,125,000 08/02/07 1,888,243 2,097,740 Common Stock (B) 425,000 shs. 08/02/07 425,000 403,750 Warrant, exercisable until 2015, to purchase common stock at $.01 per share (B) 119,360 shs. 08/02/07 194,257 1,194 ------------ ------------ 2,507,500 2,502,684 ------------ ------------ NETSHAPE TECHNOLOGIES, 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 1,406,586 Limited Partnership Interest of Saw Mill PCG Partners LLC (B) 1,020 uts. 02/01/07 1,020,000 148,757 Warrant, exercisable until 2014, to purchase common stock at $.01 per share (B) 91 shs. 02/02/07 90,830 13,247 ------------ ------------ 2,519,400 1,568,590 ------------ ------------ * 02/24/06 and 06/22/07. Massmutual Corporate Investors -------------------------------------------------------------------------------------------------------------------------------- 17 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONTINUED) March 31, 2008 (Unaudited) Principal Amount Shares, Units or Ownership Acquisition CORPORATE RESTRICTED SECURITIES:(A)(Continued) Percentage Date Cost Fair Value ------------ -------- ------------ ------------ 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 $ 1,863,462 10% Preferred Stock (B) 255 shs. 03/29/04 255,083 333,964 Common Stock (B) 6,455 shs. 03/29/04 6,455 491,774 Warrant, exercisable until 2012, to purchase common stock at $.01 per share (B) 8,622 shs. 03/29/04 7,323 656,878 ------------ ------------ 2,125,000 3,346,078 ------------ ------------ 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 1,419,891 1,125,000 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 -- ------------ ------------ 2,706,936 1,896,875 ------------ ------------ 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 01/03/06 556,970 543,948 13% Senior Subordinated Note due 2013 $ 687,241 01/03/06 622,483 652,579 Common Stock (B) 322,307 shs. 01/03/06 322,307 20,585 Warrant, exercisable until 2013, to purchase common stock at $.01 per share (B) 75,378 shs. 01/03/06 62,824 4,814 ------------ ------------ 1,564,584 1,221,926 ------------ ------------ OLYMPIC SALES, INC. A boat retailer in Washington state, Oregon, California and British Columbia. 12% Senior Subordinated Note due 2008 $ 1,022,000 08/07/98 1,022,000 1,006,616 12% Senior Subordinated Note due 2008 $ 307,071 02/09/00 303,298 302,403 Limited Partnership Interest of Riverside VIII, VIII-A and VIII-B Holding Company, L.P. (B) 20.58% int. * 1,555,992 -- Warrants, exercisable until 2008, to purchase common stock at $.01 per share (B) 28,648 shs. ** 389,188 -- ------------ ------------ 3,270,478 1,309,019 ------------ ------------ * 08/07/98, 02/23/99, 12/22/99 and 02/25/03. ** 08/07/98 and 02/09/00. -------------------------------------------------------------------------------------------------------------------------------- 18 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONTINUED) March 31, 2008 (Unaudited) Principal Amount Shares, Units or Ownership Acquisition CORPORATE RESTRICTED SECURITIES:(A)(Continued) Percentage Date Cost Fair Value ------------ -------- ------------ ------------ ONTARIO DRIVE & GEAR LTD. A manufacturer of all-wheel drive, off-road amphibious vehicles and related accessories. Limited Liability Company Unit (B) 3,667 uts. 01/17/06 $ 572,115 $ 1,018,215 Warrant, exercisable until 2013, to purchase common stock at $.01 per share (B) 619 shs. 01/17/06 170,801 171,911 ------------ ------------ 742,916 1,190,126 ------------ ------------ 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 $ 2,233,330 07/03/06 2,130,446 2,226,966 Preferred Unit (B) 382 uts. 07/03/06 382,150 395,907 Preferred Unit (B) 69 uts. 07/03/06 68,790 71,266 Common Unit Class I (B) 148 uts. 07/03/06 -- -- Common Unit Class L (B) 31 uts. 07/03/06 -- -- ------------ ------------ 2,581,386 2,694,139 ------------ ------------ 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 2,160,956 2,317,950 Preferred Stock (B) 36 shs. 03/31/06 329,596 380,176 Common Stock (B) 23 shs. 03/31/06 25,500 55,698 Warrant, exercisable until 2013, to purchase common stock at $.01 per share (B) 13 shs. 03/31/06 11,122 32,399 ------------ ------------ 2,527,174 2,786,223 ------------ ------------ PACIFIC CONSOLIDATED HOLDINGS LLC A manufacturer of rugged, mobile liquid and gaseous oxygen and nitrogen generating systems used in the global defense, oil & gas, and medical sectors. 12% Senior Subordinated Note due 2012 $ 1,304,624 04/27/07 1,198,729 1,218,741 Limited Liability Company Unit (B) 1,754,707 uts. 04/27/07 63,233 60,011 ------------ ------------ 1,261,962 1,278,752 ------------ ------------ 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 2011 $ 2,125,000 12/19/00 2,085,946 2,109,962 Membership Interests of MM/Lincap PPI Investments, Inc., LLC (B) 2.42% int. 12/21/00 265,625 162,285 ------------ ------------ 2,351,571 2,272,247 ------------ ------------ Massmutual Corporate Investors -------------------------------------------------------------------------------------------------------------------------------- 19 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONTINUED) March 31, 2008 (Unaudited) Principal Amount Shares, Units or Ownership Acquisition CORPORATE RESTRICTED SECURITIES:(A)(Continued) Percentage Date Cost Fair Value ------------ -------- ------------ ------------ POSTLE ALUMINUM COMPANY LLC A manufacturer and distributor of aluminum extruded products. 12% Senior Subordinated Note due 2014 $ 2,040,000 10/02/06 $ 1,899,155 $ 2,049,061 Limited Liability Company Unit (B) 1,384 uts. 10/02/06 510,000 422,958 Warrant, exercisable until 2016, to purchase common stock at $.01 per share (B) 344 shs. 10/02/06 124,644 105,197 ------------ ------------ 2,533,799 2,577,216 ------------ ------------ POWER SERVICES HOLDING COMPANY A provider of industrial motor repair services, predictive and preventative maintenance, and performance improvement consulting, serving the petrochemical, mining, power generation, metals, and paper industries. 12% Senior Subordinated Note due 2016 $ 2,372,093 02/11/08 2,158,373 2,340,344 Limited Partnership Interest 177,729 uts. 02/11/08 177,729 168,843 Warrant, exercisable until 2016, to purchase common stock at $.01 per share (B) 1,322 shs. 02/11/08 167,588 13 ------------ ------------ 2,503,690 2,509,200 ------------ ------------ 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 1,542,560 1,737,234 Common Stock (B) 354,166 shs. 05/28/04 354,166 198,016 Warrant, exercisable until 2012, to purchase common stock at $.01 per share 377,719 shs. 05/28/04 377,719 211,184 ------------ ------------ 2,274,445 2,146,434 ------------ ------------ QUALSERV CORPORATION A provider of foodservice equipment and supplies to major restaurant chains and their franchisees. Limited Partnership Interest (B) 9.26% int. 07/09/04 1 -- ------------ ------------ * 08/12/94 and 11/14/01. -------------------------------------------------------------------------------------------------------------------------------- 20 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONTINUED) March 31, 2008 (Unaudited) Principal Amount Shares, Units or Ownership Acquisition CORPORATE RESTRICTED SECURITIES:(A)(Continued) Percentage Date Cost Fair Value ------------ -------- ------------ ------------ R A J MANUFACTURING HOLDINGS LLC A designer and manufacturer of women's swimwear sold under a variety of licensed brand names. 12.5% Senior Subordinated Note due 2014 $ 2,267,190 12/15/06 $ 2,090,363 $ 2,270,225 Limited Liability Company Unit (B) 2,828 uts. 12/15/06 282,810 154,950 Warrant, exercisable until 2014, to purchase common stock at $.01 per share (B) 3 shs. 12/15/06 131,483 73,072 ------------ ------------ 2,504,656 2,498,247 ------------ ------------ R E I DELAWARE HOLDING, INC. An engineer and manufacturer of highly complex, close tolerance components, assemblies, tooling and custom automation equipment primarily for aerospace, medical and defense/radar markets. 12% Senior Subordinated Note due 2016 $ 2,550,000 01/18/08 2,467,911 2,524,713 Warrant, exercisable until 2018, to purchase common stock at $.01 per share (B) 6 shs. 01/18/08 31,089 -- ------------ ------------ 2,499,000 2,524,713 ------------ ------------ 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 2,116,579 2,305,851 Common Stock (B) 289,362 shs. 02/10/06 289,362 372,362 Warrant, exercisable until 2016, to purchase common stock at $.01 per share (B) 131,555 shs. 02/10/06 119,796 169,290 ------------ ------------ 2,525,737 2,847,503 ------------ ------------ 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 11/14/03 990,317 1,053,717 Warrant, exercisable until 2011, to purchase common stock at $.01 per share (B) 140 shs. 11/14/03 122,946 131,613 ------------ ------------ 1,113,263 1,185,330 ------------ ------------ SAFETY SPEED CUT MANUFACTURING COMPANY, INC. A manufacturer of vertical panel saws and routers for the wood working industry. Class B Common Stock (B) 1,480 shs. 06/02/99 256,212 1,274,560 ------------ ------------ Massmutual Corporate Investors -------------------------------------------------------------------------------------------------------------------------------- 21 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONTINUED) March 31, 2008 (Unaudited) Principal Amount Shares, Units or Ownership Acquisition CORPORATE RESTRICTED SECURITIES:(A)(Continued) Percentage Date Cost Fair Value ------------ -------- ------------ ------------ SAVAGE SPORTS HOLDING, INC. A manufacturer of sporting firearms. 12% Senior Subordinated Note due 2012 $ 1,538,793 09/10/04 $ 1,459,402 $ 1,559,729 Common Stock (B) 612 shs. * 642,937 1,096,954 Warrant, exercisable until 2012, to purchase common stock at $.01 per share (B) 134 shs. 09/10/04 113,578 239,502 ------------ ------------ 2,215,917 2,896,185 ------------ ------------ SMART SOURCE HOLDINGS LLC A short-term computer rental company. 12% Senior Subordinated Note due 2015 $ 2,223,076 ** 2,020,239 2,173,415 Limited Liability Company Unit (B) 619 uts. ** 638,061 588,487 Warrant, exercisable until 2015, to purchase common stock at $.01 per share (B) 157 shs. ** 164,769 2 ------------ ------------ 2,823,069 2,761,904 ------------ ------------ SPECIALTY FOODS GROUP, INC. A manufacturer and distributor of branded meat products. Limited Partnership Interest of MHD Holdings LLC (B) 1.43% int. 08/29/00 684,724 -- ------------ ------------ 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 2,112,769 2,217,508 Common Stock (B) 311 shs. 08/01/06 310,976 367,957 Warrant, exercisable until 2014, to purchase common stock at $.02 per share (B) 104 shs. 08/01/06 93,293 122,546 ------------ ------------ 2,517,038 2,708,011 ------------ ------------ 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 -- ------------ ------------ T H I ACQUISITION, INC. A machine servicing company providing value-added steel services to long steel products. 12% Senior Subordinated Note due 2016 $ 2,550,000 01/14/08 2,410,946 2,522,305 Warrant, exercisable until 2016, to purchase common stock at $.01 per share (B) 9 shs. 01/14/08 88,054 -- ------------ ------------ 2,499,000 2,522,305 ------------ ------------ * 09/10/04 and 10/05/07. ** 08/31/07 and 03/06/08. -------------------------------------------------------------------------------------------------------------------------------- 22 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONTINUED) March 31, 2008 (Unaudited) Principal Amount Shares, Units or Ownership Acquisition CORPORATE RESTRICTED SECURITIES:(A)(Continued) Percentage Date Cost Fair Value ------------ -------- ------------ ------------ 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 $ 1,939,864 $ 2,217,385 Common Stock (B) 2,203 shs. 10/14/05 2,203 1,620,923 Warrant, exercisable until 2013, to purchase common stock at $.01 per share (B) 1,167 shs. 10/14/05 294,403 858,655 ------------ ------------ 2,236,470 4,696,963 ------------ ------------ 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. 8.7% Senior Secured Tranche B Note due 2012 (C) $ 1,520,515 * 1,515,366 1,462,549 12% Senior Subordinated Note due 2014 $ 1,162,110 ** 1,110,071 1,151,549 Limited Partnership Interest of Saw Mill Capital Fund V, L.P. (B) 2.30% int. 03/01/05 116,285 728,014 Warrant, exercisable until 2016, to purchase common stock at $.01 per share (B) 72 shs. 04/28/06 59,041 126,579 ------------ ------------ 2,800,763 3,468,691 ------------ ------------ TORRENT GROUP HOLDINGS, INC. A contractor specializing in the sales and installation of engineered drywells for the retention and filtration of stormwater and nuisance water flow. 12.5% Senior Subordinated Note due 2013 $ 2,239,024 10/26/07 2,102,363 2,210,216 Series A Preferred Stock (B) 414 shs. 10/26/07 414,051 393,348 ------------ ------------ 2,516,414 2,603,564 ------------ ------------ TOTAL E & S, 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 03/02/07 838,581 840,878 13% Senior Subordinated Note due 2014 $ 598,450 03/02/07 490,608 588,306 Common Stock (B) 125,199 shs. 03/02/07 125,199 50,736 Warrant, exercisable until 2014 to purchase common stock at $.01 per share (B) 34,533 shs. 03/02/07 95,873 13,994 ------------ ------------ 1,550,261 1,493,914 ------------ ------------ * 4/28/06 and 12/21/06. ** 04/28/06 and 09/13/06. Massmutual Corporate Investors -------------------------------------------------------------------------------------------------------------------------------- 23 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONTINUED) March 31, 2008 (Unaudited) Principal Amount Shares, Units or Ownership Acquisition CORPORATE RESTRICTED SECURITIES:(A)(Continued) Percentage 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 2010 $ 2,712,000 02/05/98 $ 2,579,765 $ 2,712,000 Common Stock (B) 630 shs. 02/04/98 630,000 691,096 Warrant, exercisable until 2009, to purchase common stock at $.01 per share (B) 444 shs. 02/05/98 368,832 487,058 ------------ ------------ 3,578,597 3,890,154 ------------ ------------ TRANSPAC HOLDING COMPANY A designer, importer, and wholesaler of home decor and seasonal gift products. 12% Senior Subordinated Note due 2015 $ 1,773,006 10/31/07 1,652,045 1,737,913 Common Stock (B) 209 shs. 10/31/07 208,589 198,161 Warrant, exercisable until 2015, to purchase common stock at $.01 per share (B) 94 shs. 10/31/07 87,607 1 ------------ ------------ 1,948,241 1,936,075 ------------ ------------ TRANSTAR HOLDING COMPANY A distributor of aftermarket automotive transmission parts. 12% Senior Subordinated Note due 2014 $ 1,734,000 08/31/05 1,669,957 1,777,631 Common Stock (B) 1,078 shs. * 1,078,450 1,413,404 Warrant, exercisable until 2014, to purchase common stock at $.02 per share (B) 86 shs. 08/31/05 77,485 112,632 ------------ ------------ 2,825,892 3,303,667 ------------ ------------ 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 ** 2,173,291 2,078,587 Common Stock (B) 742 shs. ** 800,860 141,012 Warrant, exercisable until 2013, to purchase common stock at $.02 per share (B) 153 shs. ** 159,894 29,124 ------------ ------------ 3,134,045 2,248,723 ------------ ------------ * 08/31/05 and 04/30/07 ** 07/19/05 and 12/22/05. -------------------------------------------------------------------------------------------------------------------------------- 24 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONTINUED) March 31, 2008 (Unaudited) Principal Amount Shares, Units or Ownership Acquisition CORPORATE RESTRICTED SECURITIES:(A)(Continued) Percentage Date Cost Fair Value ------------ -------- ------------ ------------ TRUSTILE DOORS, INC. A manufacturer and distributor of interior doors. 12.5% Senior Subordinated Note due 2010 $ 850,000 04/11/03 $ 819,843 $ 856,648 Warrant, exercisable until 2010, to purchase common stock at $.01 per share (B) 5,781 shs. 04/11/03 83,927 216,342 ------------ ------------ 903,770 1,072,990 ------------ ------------ U M A ENTERPRISES, INC. An importer and wholesaler of home decor products. 15% Senior Subordinated Note due 2015 $ 1,663,044 02/08/08 1,629,783 1,654,008 Convertible Preferred Stock (B) 887 shs. 02/08/08 886,956 842,612 ------------ ------------ 2,516,739 2,496,620 ------------ ------------ 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 1,741,666 1,850,740 Common Stock (B) 182 shs. 04/30/04 182,200 137,176 Warrant, exercisable until 2012, to purchase common stock at $.01 per share (B) 230 shs. 04/30/04 211,736 173,480 ------------ ------------ 2,135,602 2,161,396 ------------ ------------ VICTORY VENTURES LLC An acquirer of controlling or substantial interests in other entities. Series A Preferred Units (B) 1 ut. 12/02/96 937 -- ------------ ------------ VISIONEERING, INC. A designer and manufacturer of tooling and fixtures for the aerospace industry. 10.5% Senior Secured Term Loan due 2013 $ 802,941 05/17/07 790,897 801,983 13% Senior Subordinated Note due 2014 $ 648,530 05/17/07 584,511 646,646 Common Stock (B) 123,529 shs. 05/17/07 123,529 117,353 Warrant, exercisable until 2014, to purchase common stock at $.01 per share (B) 35,006 shs. 05/17/07 55,055 350 ------------ ------------ 1,553,992 1,566,332 ------------ ------------ * 09/24/04 and 12/22/06. Massmutual Corporate Investors -------------------------------------------------------------------------------------------------------------------------------- 25 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONTINUED) March 31, 2008 (Unaudited) Principal Amount Shares, Units or Ownership Acquisition CORPORATE RESTRICTED SECURITIES:(A)(Continued) Percentage Date Cost Fair Value ------------ -------- ------------ ------------ VITALITY FOODSERVICE, INC. A non-carbonated beverage dispensing company focused on the foodservice industry. 13% Senior Subordinated Note due 2011 $ 1,887,288 09/24/04 $ 1,770,082 $ 1,706,371 Common Stock (B) 26,456 shs. * 264,558 197,509 Warrant, exercisable until 2011, to purchase common stock at $.01 per share (B) 23,787 shs. 09/24/04 186,883 177,583 ------------ ------------ 2,221,523 2,081,463 ------------ ------------ 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 1,530,000 14.5% PIK Note due 2010 $ 212,500 06/30/07 192,717 191,250 Limited Liability Company Unit Class A (B) 414,375 uts. 07/19/04 414,375 -- Limited Liability Company Unit Class B (B) 182,935 uts. 07/19/04 182,935 -- ------------ ------------ 2,273,092 1,721,250 ------------ ------------ WAGGIN' TRAIN HOLDINGS LLC A producer of premium quality meat dog treats. 14% Senior Subordinated Note due 2014 $ 2,132,785 11/15/07 2,090,198 2,083,933 Limited Liability Company Unit Class B (B) 423 uts. 11/15/07 422,652 401,518 Limited Liability Company Unit Class C (B) 423 uts. 11/15/07 -- 4 ------------ ------------ 2,512,850 2,485,455 ------------ ------------ WALLS INDUSTRIES, INC. A provider of branded workwear and sporting goods apparel. Limited Partnership Interest (B) 0.40% int. 07/12/04 3,728 6,770 Common Stock (B) 4,028 shs. 12/21/07 -- 7,315 ------------ ------------ 3,728 14,085 ------------ ------------ 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 1,609,019 1,629,273 Common Stock (B) 191 shs. 11/30/06 191,250 112,950 Warrant, exercisable until 2014, to purchase common stock at $.01 per share (B) 95 shs. 11/30/06 86,493 56,389 ------------ ------------ 1,886,762 1,798,612 ------------ ------------ * 09/24/04 and 12/22/06. -------------------------------------------------------------------------------------------------------------------------------- 26 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONTINUED) March 31, 2008 (Unaudited) Principal Amount Shares, Units or Ownership Acquisition CORPORATE RESTRICTED SECURITIES:(A)(Continued) Percentage Date Cost Fair Value ------------ -------- ------------ ------------ WORKPLACE MEDIA HOLDING CO. A direct marketer specializing in providing advertisers with access to consumers in the workplace. 13% Senior Subordinated Note due 2015 $ 1,159,196 05/14/07 $ 1,057,494 $ 1,078,674 Limited Partnership Interests (B) 23.16% int. 05/14/07 115,804 98,433 Warrant, exercisable until 2015, to purchase common stock at $.02 per share (B) 88 shs. 05/14/07 83,462 1 ------------ ------------ 1,256,760 1,177,108 ------------ ------------ TOTAL PRIVATE PLACEMENT INVESTMENTS (F) 180,321,879 177,231,828 ------------ ------------ Massmutual Corporate Investors -------------------------------------------------------------------------------------------------------------------------------- 27 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONTINUED) March 31, 2008 (Unaudited) Shares or Interest Due Principal CORPORATE RESTRICTED SECURITIES: (A) (Continued) Rate Date Amount Cost Fair Value ------- -------- ------------ ------------ ------------ RULE 144A SECURITIES - 3.50%: BONDS - 3.50% American Tire Distributor (C) 10.979% 04/01/12 $ 1,000,000 $ 950,000 $ 895,000 Charter Communications Op LLC 8.000 04/30/12 550,000 529,125 504,625 Compucom Systems, Inc. 12.500 10/01/15 1,330,000 1,285,972 1,240,225 Douglas Dynamics LLC 7.750 01/15/12 630,000 632,568 472,500 G F S I, Inc. (C) 10.500 06/01/11 750,000 719,745 697,500 Intergen NV 9.000 06/30/17 750,000 743,918 783,750 Packaging Dynamics Corporation of America 10.000 05/01/16 1,200,000 1,195,334 894,000 Penhall International 12.000 08/01/14 650,000 665,823 549,250 Rock-Tenn Co. 9.250 03/15/16 75,000 74,475 77,625 Ryerson, Inc. 12.000 11/01/15 65,000 65,000 61,425 Snoqualmie Entertainment Authority 9.125 02/01/15 500,000 487,956 425,000 Tenneco, Inc. 8.125 11/15/15 100,000 100,000 99,250 Tunica-Biloxi Gaming Authority 9.000 11/15/15 1,075,000 1,104,778 1,042,750 TXU Energy Company LLC 10.250 11/01/15 1,000,000 1,004,875 996,250 ------------ ------------ TOTAL BONDS $ 9,559,569 $ 8,739,150 ------------ ------------ CONVERTIBLE PREFERRED STOCK - 0.00% ETEX Corporation 777 716 -- ------------ ------------ TOTAL CONVERTIBLE PREFERRED STOCK 716 -- ------------ ------------ PREFERRED STOCK - 0.00% TherOX, Inc. 103 4,131 -- ------------ ------------ TOTAL PREFERRED STOCK 4,131 -- ------------ ------------ COMMON STOCK - 0.00% Touchstone Health Partnership 1,168 4,254 -- ------------ ------------ TOTAL COMMON STOCK 4,254 -- ------------ ------------ TOTAL RULE 144A SECURITIES 9,568,670 8,739,150 ------------ ------------ TOTAL CORPORATE RESTRICTED SECURITIES $189,890,549 $185,970,978 ------------ ------------ ---------------------------------------------------------------------------------------------------------------- 28 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONTINUED) March 31, 2008 (Unaudited) Interest Due Principal Market CORPORATE PUBLIC SECURITIES - 26.14%: (A) Rate Date Amount Cost Value ------- -------- ------------ ------------ ------------ BONDS - 23.88% A M C Entertainment, Inc. 11.000% 02/01/16 $ 815,000 $ 817,222 $ 763,038 Activant Solutions, Inc. 9.500 05/01/16 150,000 150,000 126,000 Affinia Group, Inc. 9.000 11/30/14 785,000 709,625 678,044 ALH Fin LLC / ALH Fin Corporation 8.500 01/15/13 870,000 839,213 791,700 Appleton Papers, Inc. 8.125 06/15/11 300,000 300,000 288,750 Aramark Corporation (C) 6.739 02/01/15 200,000 200,000 176,500 Aramark Corporation 8.500 02/01/15 500,000 502,500 501,250 Atlas Pipeline Partners 8.125 12/15/15 200,000 200,000 203,500 Bally Total Fitness Holdings Corporation 14.000 10/01/13 90,000 73,350 54,000 Basic Energy Services 7.125 04/15/16 225,000 225,000 214,313 Blockbuster, Inc. (C) 9.000 09/01/12 475,000 475,675 387,125 Boyd Gaming Corporation 7.125 02/01/16 1,000,000 824,250 805,000 Brigham Exploration Co. 9.625 05/01/14 1,200,000 1,167,903 1,032,000 Bristow Group, Inc. 7.500 09/15/17 150,000 150,000 150,750 CCH I Holdings LLC 11.125 01/15/14 550,000 351,438 264,000 Cablevision Systems Corporation 8.000 04/15/12 1,000,000 1,010,857 972,500 Cenveo Corporation 7.875 12/01/13 550,000 550,000 445,500 Chaparral Energy, Inc. 8.875 02/01/17 1,500,000 1,491,780 1,301,250 Cincinnati Bell, Inc. 8.375 01/15/14 1,100,000 1,007,500 1,031,250 Clayton Williams Energy, Inc. 7.750 08/01/13 1,200,000 1,179,000 1,038,000 Community Health Systems, Inc. 8.875 07/15/15 1,200,000 1,169,415 1,204,500 Delta Petroleum Corporation 7.000 04/01/15 750,000 661,875 667,500 Dynegy Holdings, Inc. 6.875 04/01/11 500,000 422,500 491,250 Dynegy Holdings, Inc. 7.500 06/01/15 500,000 446,548 468,750 Dynegy Holdings, Inc. 8.375 05/01/16 330,000 330,000 326,700 Edison Mission Energy 7.750 06/15/16 55,000 55,000 56,650 Esterline Technologies 7.750 06/15/13 200,000 200,000 203,000 Ford Motor Credit Co. 7.375 10/28/09 1,250,000 1,246,875 1,138,916 Gencorp, Inc. 9.500 08/15/13 259,000 259,000 257,058 General Motors Acceptance Corporation 7.750 01/19/10 1,250,000 1,276,465 1,081,208 Goodyear Tire & Rubber Co. 7.857 08/15/11 1,400,000 1,342,750 1,433,250 Graham Packaging Corporation 9.875 10/15/14 280,000 252,700 235,200 Great Lakes Dredge & Dock Corporation 7.750 12/15/13 500,000 481,250 457,500 H C A, Inc. 9.250 11/15/16 975,000 990,924 1,011,563 Hawker Beechcraft Acquisition Co. 9.750 04/01/17 1,275,000 1,287,356 1,268,625 Hughes Network Systems 9.500 04/15/14 1,050,000 1,071,103 1,044,750 Inergy LP 8.250 03/01/16 150,000 150,000 153,375 Massmutual Corporate Investors ---------------------------------------------------------------------------------------------------------------- 29 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONTINUED) March 31, 2008 (Unaudited) Interest Due Principal CORPORATE PUBLIC SECURITIES: (A) (Continued) Rate Date Amount Cost Market Value ------- -------- ------------ ------------ ------------ Intelsat Bermuda Ltd. 9.250% 06/15/16 $ 1,365,000 $ 1,416,096 $ 1,375,238 Interline Brands, Inc. 8.125 06/15/14 1,300,000 1,291,107 1,241,500 Kar Holdings, Inc. 8.750 05/01/14 50,000 50,000 44,500 Kar Holdings, Inc. 10.000 05/01/15 1,000,000 926,448 865,000 Koppers, Inc. 9.875 10/15/13 477,000 477,000 500,850 Leucadia National Corporation 7.000 08/15/13 650,000 659,293 645,125 Liberty Media Corporation 5.700 05/15/13 1,000,000 951,610 875,544 Majestic Star Casino LLC 9.500 10/15/10 500,000 500,000 441,250 Manitowoc Company, Inc. 7.125 11/01/13 200,000 200,000 198,000 Mariner Energy, Inc. 8.000 05/15/17 800,000 805,187 764,000 Markwest Energy Operating Co. 6.875 11/01/14 775,000 763,000 732,375 Mediacom Broadband LLC 8.500 10/15/15 1,500,000 1,517,532 1,260,000 N R G Energy, Inc. 7.375 02/01/16 175,000 175,000 171,500 N T L Cable PLC 9.125 08/15/16 1,380,000 1,416,455 1,235,100 Neiman Marcus Group, Inc. 10.375 10/15/15 750,000 757,500 750,000 Newark Group, Inc. 9.750 03/15/14 850,000 796,863 688,500 North American Energy Partners 8.750 12/01/11 1,165,000 1,175,372 1,153,350 O E D Corp./Diamond Jo Company Guarantee 8.750 04/15/12 1,000,000 985,960 880,000 Petrohawk Energy Corporation 9.125 07/15/13 1,500,000 1,522,830 1,541,250 Pliant Corporation 11.125 09/01/09 550,000 539,000 437,250 Pliant Corporation (C) 11.850 06/15/09 990,634 998,818 970,822 Polypore, Inc. 8.750 05/15/12 1,960,000 1,893,800 1,881,600 Pregis Corporation 12.375 10/15/13 1,000,000 981,490 930,000 Quality Distribution, Inc. (C) 8.758 01/15/12 545,000 547,096 407,388 Quebecor Media, Inc. 7.750 03/15/16 1,175,000 1,097,423 1,072,188 RBS Global & Rexnord Corporation 11.750 08/01/16 275,000 284,486 237,875 Rental Service Corporation 9.500 12/01/14 1,500,000 1,489,385 1,252,500 Scholastic Corporation 5.000 04/15/13 1,500,000 1,278,750 1,278,656 Sheridan Acquisition Corporation 10.250 08/15/11 375,000 370,001 330,469 Stanadyne Corporation 10.000 08/15/14 1,500,000 1,500,000 1,365,000 Steel Dynamics, Inc. 6.750 04/01/15 200,000 200,000 196,000 Stewart & Stevenson LLC 10.000 07/15/14 1,500,000 1,536,464 1,440,000 Stratos Global 9.875 02/15/13 575,000 578,167 584,344 Tekni-Plex, Inc. 8.750 11/15/13 650,000 655,126 572,000 Tenneco, Inc. 8.625 11/15/14 1,000,000 1,002,318 982,500 Texas Industries, Inc. 7.250 07/15/13 70,000 70,000 68,075 Time Warner Telecom Holdings 9.250 02/15/14 1,000,000 1,009,912 1,010,000 Titan International, Inc. 8.000 01/15/12 370,000 365,600 362,600 ---------------------------------------------------------------------------------------------------------------- 30 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONTINUED) March 31, 2008 (Unaudited) Interest Due Principal CORPORATE PUBLIC SECURITIES: (A) (Continued) Rate Date Amount Cost Market Value ------- -------- ------------ ------------ ------------ Trimas Corporation 9.875% 06/15/12 $ 823,000 $ 764,250 $ 716,010 Triton PCS, Inc. 8.500 06/01/13 550,000 550,000 572,688 Tube City IMS Corporation 9.750 02/01/15 1,000,000 1,009,604 880,000 United Components, Inc. 9.375 06/15/13 1,080,000 1,081,001 989,550 United Rentals, Inc. 7.750 11/15/13 625,000 625,000 509,375 United Rentals, Inc. 7.000 02/15/14 500,000 500,000 392,500 Vought Aircraft Industries 8.000 07/15/11 1,000,000 998,796 917,500 Warner Music Group Corporation 7.375 04/15/14 275,000 275,000 211,750 Waste Services, Inc. 9.500 04/15/14 1,100,000 1,121,102 1,053,250 ------------ ------------ TOTAL BONDS $ 63,578,916 $ 59,709,237 ------------ ------------ COMMON STOCK - 2.02% Bally Total Fitness Holdings Corporation (B) 600 $ 5,520 $ 156 Chase Packaging Corporation 9,541 -- 1,908 Comcast Corporation 33,200 613,868 642,088 EnerNOC, Inc. (B) 46,500 1,283,262 530,100 ITC^DeltaCom, Inc. (B) 178,666 1,563,328 661,064 PepsiAmericas, Inc. 92,145 2,006,365 2,352,462 Supreme Industries, Inc. 115,721 267,323 659,610 Visa, Inc. 3,324 146,256 207,285 ------------ ------------ TOTAL COMMON STOCK $ 5,885,922 $ 5,054,673 ------------ ------------ CONVERTIBLE BONDS - 0.24% Citadel Broadcasting Corporation 1.875% 02/15/11 $ 700,000 $ 543,375 $ 594,125 ------------ ------------ TOTAL CONVERTIBLE BONDS 543,375 594,125 ------------ ------------ TOTAL CORPORATE PUBLIC SECURITIES $ 70,008,213 $ 65,358,035 ------------ ------------ Massmutual Corporate Investors ---------------------------------------------------------------------------------------------------------------- 31 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONTINUED) March 31, 2008 (Unaudited) Interest Due Principal CORPORATE PUBLIC SECURITIES: (A) (Continued) Rate/Yield* Date Amount Cost Market Value ------- -------- ------------ ------------ ------------ SHORT-TERM SECURITIES: COMMERCIAL PAPER - 10.41% Detroit Edison Company 3.052% 04/04/08 $ 4,900,000 $ 4,898,755 $ 4,898,755 Duke Energy Carolinas LLC 3.102 04/02/08 3,854,000 3,853,668 3,853,668 Duke Energy Carolinas LLC 3.107 04/11/08 302,000 301,740 301,740 International Lease Finance Corporation 2.583 04/07/08 988,000 987,575 987,575 International Lease Finance Corporation 3.003 04/09/08 2,539,000 2,537,307 2,537,307 Kraft Foods, Inc. 3.155 04/01/08 883,000 883,000 883,000 P P G Industries, Inc. 3.103 04/07/08 3,422,000 3,420,232 3,420,232 Textron Financial Corporation 3.350 04/01/08 4,873,000 4,873,000 4,873,000 Wisconsin Gas Company 2.651 04/03/08 4,266,000 4,265,372 4,265,372 ------------ ------------ TOTAL SHORT-TERM SECURITIES $ 26,020,649 $ 26,020,649 ------------ ------------ TOTAL INVESTMENTS 110.94% $285,919,411 $277,349,662 ============ ============ Other Assets 2.78 6,967,838 Liabilities (13.72) (34,309,976) ------ ------------ TOTAL NET ASSETS 100.00% $250,007,524 ====== ============ (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 3/31/08. (D) Defaulted Security; interest not accrued. (E) Security publicly priced. (F) Illiquid securities. At March 31, 2008, the value of these securities amounted to $177,231,828 or 70.89% of net assets. * Effective yield at purchase. PIK - Payment-in-kind ---------------------------------------------------------------------------------------------------------------- 32 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONTINUED) March 31, 2008 (Unaudited) Fair Value/ Fair Value/ INDUSTRY CLASSIFICATION: Market Value Market Value -------------- -------------- AEROSPACE - 4.38% BROADCASTING & ENTERTAINMENT - 2.69% Consolidated Foundries Holdings $ 4,278,202 CCH I Holdings LLC $ 264,000 Esterline Technologies 203,000 Cablevision Systems Corporation 972,500 Gencorp, Inc. 257,058 Cenveo Corporation 445,500 Hughes Network Systems 1,044,750 Charter Communications Op LLC 504,625 P A S Holdco LLC 2,694,139 Citadel Broadcasting Corporation 594,125 Visioneering, Inc. 1,566,332 Comcast Corporation 642,088 Vought Aircraft Industries 917,500 Liberty Media Corporation 875,544 -------------- Mediacom Broadband LLC 1,260,000 10,960,981 Workplace Media Holding Co. 1,177,108 -------------- -------------- AUTOMOBILE - 7.72% 6,735,490 American Tire Distributor 895,000 -------------- Ford Motor Credit Co. 1,138,916 BUILDINGS & REAL ESTATE - 1.46% Fuel Systems Holding Corporation 2,137,849 K W P I Holdings Corporation 2,516,529 General Motors Acceptance Corporation 1,081,208 Texas Industries, Inc. 68,075 Goodyear Tire & Rubber Co. 1,433,250 TruStile Doors, Inc. 1,072,990 Jason, Inc. 1,651,494 -------------- Nyloncraft, Inc. 1,896,875 3,657,594 Ontario Drive & Gear Ltd. 1,190,126 -------------- Qualis Automotive LLC 2,146,434 CHEMICAL, PLASTICS & RUBBER - 0.42% Tenneco, Inc. 1,081,750 Capital Specialty Plastics, Inc. 558,932 Titan International, Inc. 362,600 Koppers, Inc. 500,850 Transtar Holding Company 3,303,667 -------------- United Components, Inc. 989,550 1,059,782 -------------- -------------- 19,308,719 CONSUMER PRODUCTS - 8.20% -------------- Aero Holdings, Inc. 3,601,570 BEVERAGE, DRUG & FOOD - 4.19% ALH Fin LLC/ALH Fin Corporation 791,700 Aramark Corporation 677,750 Bravo Sports Holding Corporation 2,681,264 Golden Country Foods Holding, Inc. 2,003,987 G F S I, Inc. 697,500 Nonni's Food Company 3,346,078 K N B Holdings Corporation 2,686,184 PepsiAmericas, Inc. 2,352,462 Kar Holdings, Inc. 909,500 Specialty Foods Group, Inc. -- Momentum Holding Co. 1,551,177 Vitality Foodservice, Inc. 2,081,463 R A J Manufacturing Holdings LLC 2,498,247 -------------- Royal Baths Manufacturing Company 1,185,330 10,461,740 The Tranzonic Companies 3,890,154 -------------- Walls Industries, Inc. 14,085 -------------- 20,506,711 -------------- Massmutual Corporate Investors ------------------------------------------------------------------------------------------------------------------------------------ 33 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONTINUED) March 31, 2008 (Unaudited) Fair Value/ Fair Value/ INDUSTRY CLASSIFICATION:(Continued) Market Value Market Value -------------- -------------- CONTAINERS, PACKAGING & GLASS - 5.24% DIVERSIFIED/CONGLOMERATE, Chase Packaging Corporation $ 1,908 SERVICE - 4.09% Flutes, Inc. 1,470,001 Advanced Technologies Holdings $ 2,496,324 Graham Packaging Corporation 235,200 CapeSuccess LLC 5,862 Maverick Acquisition Company 801,301 Diversco, Inc./DHI Holdings, Inc. 778,527 P I I Holding Corporation 2,786,223 Dwyer Group, Inc. 1,373,071 Packaging Dynamics Corporation of America 894,000 Fowler Holding, Inc. 2,291,762 Paradigm Packaging, Inc. 2,272,247 Insurance Claims Management, Inc. 54,593 Pliant Corporation 1,408,072 Interline Brands, Inc. 1,241,500 Pregis Corporation 930,000 Mail Communications Group, Inc. 1,244,211 Tekni-Plex, Inc. 572,000 Moss, Inc. 732,860 Vitex Packaging Group, Inc. 1,721,250 -------------- -------------- 10,218,710 13,092,202 -------------- -------------- ELECTRONICS - 1.22% DISTRIBUTION - 2.06% Connecticut Electric, Inc. 2,274,007 Affinia Group, Inc. 678,044 Directed Electronics, Inc. 770,290 Duncan Systems, Inc. 1,680,057 -------------- Magnatech International, Inc. 2,788,426 3,044,297 Strategic Equipment & Supply Corporation, Inc. -- -------------- QualServ Corporation -- FARMING & AGRICULTURE - 0.99% -------------- Protein Genetics, Inc. -- 5,146,527 Waggin' Train Holdings LLC 2,485,455 -------------- -------------- DIVERSIFIED/CONGLOMERATE, 2,485,455 MANUFACTURING - 6.80% -------------- A H C Holding Company, Inc. 2,493,265 FINANCIAL SERVICES - 1.99% Activant Solutions, Inc. 126,000 Hawker Beechcraft Acquisition Co. 1,268,625 Arrow Tru-Line Holdings, Inc. 1,634,395 Highgate Capital LLC -- Douglas Dynamics LLC 472,500 Leucadia National Corporation 645,125 Evans Consoles, Inc. 1,301,310 Nesco Holdings Corp. 2,502,684 Great Lakes Dredge & Dock Corporation 457,500 Penhall International 549,250 Polypore, Inc. 1,881,600 Victory Ventures LLC -- Postle Aluminum Company LLC 2,577,216 -------------- Radiac Abrasives, Inc. 2,847,503 4,965,684 RBS Global & Rexnord Corporation 237,875 -------------- Trimas Corporation 716,010 HEALTHCARE, EDUCATION & Truck Bodies & Equipment International 2,248,723 CHILDCARE - 3.62% -------------- A T I Acquisition Company 2,166,925 16,993,897 American Hospice Management Holding LLC 2,008,549 -------------- Community Health Systems, Inc. 1,204,500 F H S Holdings LLC 2,655,056 H C A, Inc. 1,011,563 Touchstone Health Partnership -- -------------- 9,046,593 -------------- ------------------------------------------------------------------------------------------------------------------------------------ 34 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONTINUED) March 31, 2008 (Unaudited) Fair Value/ Fair Value/ INDUSTRY CLASSIFICATION:(Continued) Market Value Market Value -------------- -------------- HOME & OFFICE FURNISHINGS, MACHINERY - 9.99% HOUSEWARES, AND DURABLE Davis-Standard LLC $ 3,219,298 CONSUMER PRODUCTS - 8.45% E S P Holdco, Inc. 2,518,124 Connor Sport Court International, Inc. $ 1,000,568 K-Tek Holdings Corporation 2,478,964 H M Holding Company -- Manitowoc Company, Inc. 198,000 Home Decor Holding Company 2,367,484 Morton Industrial Group, Inc. 2,196,818 Justrite Manufacturing Acquisition Co. 1,855,356 Navis Global 1,741,492 K H O F Holdings, Inc. 2,515,510 NetShape Technologies, Inc. 1,568,590 Monessen Holding Corporation 2,295,000 Pacific Consolidated Holdings LLC 1,278,752 Stanton Carpet Holding Co. 2,708,011 Power Services Holding Company 2,509,200 Transpac Holdings Company 1,936,075 R E I Delaware Holding, Inc. 2,524,713 U M A Enterprises, Inc. 2,496,620 Safety Speed Cut Manufacturing Company, Inc. 1,274,560 U-Line Corporation 2,161,396 Stanadyne Corporation 1,365,000 Wellborn Forest Holding Co. 1,798,612 Stewart & Stevenson LLC 1,440,000 -------------- Supreme Industries, Inc. 659,610 21,134,632 -------------- -------------- 24,973,121 LEISURE, AMUSEMENT, -------------- ENTERTAINMENT - 3.56% MEDICAL DEVICES/BIOTECH - 2.40% A M C Entertainment, Inc. 763,038 Coeur, Inc. 1,396,052 Bally Total Fitness Holding Corporation 54,156 E X C Acquisition Corporation 166,250 Boyd Gaming Corporation 805,000 ETEX Corporation -- Electra Bicycle Company LLC 1,373,715 MicroGroup, Inc. 3,224,825 Majestic Star Casino LLC 441,250 OakRiver Technology, Inc. 1,221,926 O E D Corp/Diamond Jo Company Guarantee 880,000 TherOX, Inc. -- Savage Sports Holding, Inc. 2,896,185 -------------- Snoqualmie Entertainment Authority 425,000 6,009,053 Tunica-Biloxi Gaming Authority 1,042,750 -------------- Warner Music Group Corporation 211,750 MINING, STEEL, IRON & NON PRECIOUS -------------- METALS - 1.46% 8,892,844 Ryerson, Inc. 61,425 -------------- Steel Dynamics, Inc. 196,000 T H I Acquisition, Inc. 2,522,305 Tube City IMS Corporation 880,000 -------------- 3,659,730 -------------- NATURAL RESOURCES - 0.15% Appleton Papers, Inc. 288,750 Rock-Tenn Co. 77,625 -------------- 366,375 -------------- Massmutual Corporate Investors ------------------------------------------------------------------------------------------------------------------------------------ 35 CONSOLIDATED SCHEDULE OF INVESTMENTS(CONTINUED) March 31, 2008 (Unaudited) Fair Value/ Fair Value/ INDUSTRY CLASSIFICATION:(Continued) Market Value Market Value -------------- -------------- OIL & GAS - 3.21% TELECOMMUNICATIONS - 2.59% Atlas Pipeline Partners $ 203,500 Cincinnati Bell, Inc. $ 1,031,250 Basic Energy Services 214,313 Intelsat Bermuda Ltd. 1,375,238 Brigham Exploration Co. 1,032,000 ITC^DeltaCom, Inc. 661,064 Bristow Group, Inc. 150,750 N T L Cable PLC 1,235,100 Chaparral Energy, Inc. 1,301,250 Stratos Global 584,344 Clayton Williams Energy, Inc. 1,038,000 Time Warner Telecom Holdings 1,010,000 Delta Petroleum Corporation 667,500 Triton P C S, Inc. 572,688 Mariner Energy, Inc. 764,000 -------------- North American Energy Partners 1,153,350 6,469,684 Total E & S, Inc. 1,493,914 -------------- -------------- TRANSPORTATION - 2.18% 8,018,577 NABCO, Inc. 356,109 -------------- Quality Distribution, Inc. 407,388 PHARMACEUTICALS - 1.24% Tangent Rail Corporation 4,696,963 CorePharma LLC 2,636,376 -------------- Enzymatic Therapy, Inc. 466,578 5,460,460 -------------- -------------- 3,102,954 UTILITIES - 2.29% -------------- Dynegy Holdings, Inc. 1,286,700 PUBLISHING/PRINTING - 1.35% Edison Mission Energy 56,650 Newark Group, Inc. 688,500 Inergy LP 153,375 Quebecor Media, Inc. 1,072,188 Intergen NV 783,750 Scholastic Corporation 1,278,656 Markwest Energy Operating Co. 732,375 Sheridan Acquisition Corporation 330,469 N R G Energy, Inc. 171,500 -------------- Petrohawk Energy Corporation 1,541,250 3,369,813 TXU Energy Company LLC 996,250 -------------- -------------- RETAIL STORES - 1.84% 5,721,850 Blockbuster, Inc. 387,125 -------------- Neiman Marcus Group, Inc. 750,000 WASTE MANAGEMENT / POLLUTION - 2.85% Olympic Sales, Inc. 1,309,019 Terra Renewal Services, Inc. 3,468,691 Rental Service Corporation 1,252,500 Torrent Group Holdings, Inc. 2,603,564 United Rentals, Inc. 901,875 Waste Services, Inc. 1,053,250 -------------- -------------- 4,600,519 7,125,505 -------------- -------------- TECHNOLOGY - 1.90% Total Corporate Restricted and Compucom Systems, Inc. 1,240,225 Public Securities - 100.53% $ 251,329,013 EnerNOC, Inc. 530,100 ============== Smart Source Holdings LLC 2,761,904 Visa, Inc. 207,285 -------------- 4,739,514 -------------- See notes to Consolidated Financial Statements ------------------------------------------------------------------------------------------------------------------------------------ 36 NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (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 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 and at the same time offering an opportunity for capital gains. The Trust's principal investments are privately placed, below-investment grade, long-term debt obligations with equity features such as common stock, 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 in private placement transactions. These investments are typically mezzanine debt instruments with accompanying private equity securities made to small or middle market 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. Below investment grade or high yield securities have predominantly speculative characteristics with respect to the capacity of the issuer to pay interest and repay capital. On January 27,1998, the Board of Trustees authorized the formation of a wholly-owned subsidiary of the Trust ("MMCI Subsidiary Trust") for the purpose of holding certain investments. The results of MMCI Subsidiary Trust have been included in the accompanying 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 its consolidated financial statements in conformity with accounting principles generally accepted in the United States of America. A. VALUATION OF INVESTMENTS: Valuation of a security in the Trust's portfolio is made on the basis of market price whenever market quotations are readily available and all securities of the same class held by the Trust can be readily sold in such market. Nearly all securities which are acquired by the Trust directly from the issuers and shares into which such securities may be converted or which may be purchased on the exercise of warrants attached to such securities will be subject to legal or contractual delays in, or restrictions on, resale and will therefore be "restricted securities." Generally speaking, as contrasted with open-market sales of unrestricted securities which may be effected immediately if the market is adequate, 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"), or pursuant to a transaction that is exempt from registration under 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 its acquisition and at least quarterly thereafter. The Trustees have established guidelines to aid in the valuation of each security. Generally, restricted securities are initially valued at cost or less at the time of acquisition by the Trust. Values greater or less than cost are used thereafter for restricted securities in appropriate circumstances. Among the factors ordinarily considered are the existence of restrictions upon the sale of a security held by the Trust; an estimate of the existence and 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 MassMutual Corporate Investors -------------------------------------------------------------------------------- 37 NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED) (UNAUDITED) accordance with the Investment Company Act of 1940, as amended (the "1940 Act"). In making valuations, opinions of counsel may be relied upon as to whether or not securities are restricted securities and as to the legal requirements for public sale. When market quotations are readily available for unrestricted securities of an issuer, restricted securities of the same class are generally valued at a discount from the market price of such unrestricted securities. The Trustees, however, consider all factors in fixing any discount, including the filing of a registration statement for such securities under the 1933 Act and any other developments which are likely to increase the probability that the securities may be publicly sold by the Trust without restriction. The Trustees meet at least once 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 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 $176,461,538 (70.58% of net assets) as of March 31, 2008 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, 2008, 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 that the Trustees either designate the net realized long-term gains as undistributed and pay the federal capital gains taxes thereon or distribute all or a portion of such net gains. The Trust is taxed as a regulated investment company and is therefore limited as to the amount of non-qualified income that it may receive as the result of operating a trade or business, e.g. the Trust's pro rata share of income allocable to the Trust by a partnership operating company. The Trust's violation of this limitation could result in the loss of its status as a regulated investment company, thereby subjecting all of its net income and capital gains to corporate taxes prior to distribution to its shareholders. The Trust, from time-to-time, identifies investment opportunities in the securities of entities that could cause such trade or business income to be allocable to the Trust. The MMCI Subsidiary Trust (described in Footnote 1, -------------------------------------------------------------------------------- 38 NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED) (UNAUDITED) 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, 2008, the MMCI Subsidiary Trust has accrued no income tax expense. 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 No. 109 ("FIN 48"). Management has analyzed the Trust's tax positions taken on federal income tax returns for all open tax years and has concluded that as of March 31, 2008, no provision for income tax would be required in the Trust's financial statements. The Trust's federal and state income and federal excise tax returns for tax years for which the applicable statutes of limitations have not expired are subject to examination by the Internal Revenue Service and state departments of revenue. E. DISTRIBUTIONS TO SHAREHOLDERS: The Trust records distributions to shareholders from net investment income and net realized gains, if any, on the exdividend date. The Trust's net investment income dividend is declared four times per year, in April, July, October, and December. The Trust's net realized capital gain distribution, if any, is declared in December. F. EXPENSE REDUCTION: Citibank, N.A. ("Citibank") serves as custodian to the Trust. Pursuant to the custodian agreement, Citibank receives a fee reduced by credits on cash balances the Trust maintains with Citibank. All credit balances, if any, used to reduce the Trust's custodian fees are reported as fees paid indirectly on the Statement of Operations. For the three months ended March 31, 2008, there were no credit balances used to reduce custodian fees. 3. INVESTMENT SERVICES CONTRACT A. INVESTMENT SERVICES CONTRACT: An Investment Services Contract between the Trust and Babson Capital, effective October 1, 2005 (the "Contract"), provides for a quarterly investment advisory fee of 0.3125% of the net asset value of the Trust as of the last business day of each fiscal quarter, which is approximately equal to 1.25% annually. B. SERVICES: Under the 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 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. 4. SENIOR SECURED INDEBTEDNESS A. NOTE PAYABLE: MassMutual holds the Trust's $30,000,000 Senior Fixed Rate Convertible Note (the "Note") issued by the Trust on November 15, 2007. The Note, is due November 15, 2017 and accrues interest at 5.28% 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, 2008, the Trust incurred total interest expense on the Note of $396,000. The Trust may redeem the Note, in whole or in part, at the principal amount proposed to be redeemed together with the accrued and unpaid interest thereon through the redemption date plus 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. MassMutual Corporate Investors -------------------------------------------------------------------------------- 39 NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED) (UNAUDITED) 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 (the "Agent Bank") as of May 31, 2005, 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 a London Inter Bank Offered Rate ("LIBOR") 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 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, 2008, there was no outstanding amount against the Revolver. For the three months ended March 31, 2008, the Trust incurred total expense on the Revolver of $9,349 related to the undrawn portion. 5. PURCHASES AND SALES OF INVESTMENTS FOR THE THREE MONTHS ENDED 3/31/2008 COST OF PROCEEDS FROM INVESTMENTS SALES OR ACQUIRED MATURITIES -------- ---------- Corporate restricted securities $ 14,324,057 $ 20,627,336 Corporate public securities 9,736,271 9,437,763 The aggregate cost of investments is substantially the same for financial reporting and federal income tax purposes as of March 31, 2008. The net unrealized depreciation of investments for financial reporting and federal tax purposes as of March 31, 2008 is $8,569,749 and consists of $21,249,163 appreciation and $29,818,912 depreciation. 6. FAIR VALUE MEASUREMENTS Effective January 1, 2008, the Trust adopted FASB Statement of Financial Accounting Standards No. 157, "Fair Value Measurements" ("FAS 157"). FAS 157 clarifies the definition of fair value, establishes a framework for measuring fair values and requires additional disclosures about the use of fair value measurements. FAS 157 requires companies to provide expanded information about the assets and liabilities measured at fair value and the potential effect of these fair valuations of an entity's financial performance. Various inputs are used in determining the value of the Trust's investments. Using the hierarchy established under FAS 157, these inputs are summarized in the three broad levels listed below: Level 1: quoted prices in active markets for identical securities Level 2: other significant observable inputs (including quoted prices for similar securities, interest rates, prepayments speeds, credit risk, etc.) Level 3: significant unobservable inputs (including the Trust's own assumptions in determining the fair value of investments) The inputs and methodology used for valuing securities are not necessarily an indication of the risk associated with investing in those securities. The following is a summary of the inputs used to value the Trust's net assets as of March 31, 2008: ASSETS TOTAL LEVEL 1 LEVEL 2 LEVEL 3 ----------------------------------------------------------------------------- Private Securities $ 185,970,978 $ 770,290 $ 8,739,150 $ 176,461,538 Public Securities 65,358,035 5,054,673 60,249,362 54,000 Short-term Securities 26,020,649 -- 26,020,649 -- ----------------------------------------------------------------------------- TOTAL $ 277,349,662 $ 5,824,963 $95,009,161 $ 176,515,538 Following is a reconciliation of Level 3 assets for which significant unobservable inputs were used to determine fair value: PRIVATE PUBLIC SHORT-TERM ASSETS SECURITIES SECURITIES SECURITIES TOTAL ----------------------------------------------------------------------------- Beginning balance at 12/31/2007 $ 175,656,608 $ 74,700 $ -- $ 175,731,308 Total Gains or Losses (realized/unrealized) included in earnings* (263,552) (20,700) -- (284,252) Purchases, sales, issuances & settlements (net) 1,068,482 -- -- 1,068,482 ----------------------------------------------------------------------------- ENDING BALANCE AT 3/31/08 $ 176,461,538 $ 54,000 $ 176,515,538 * The amount of total gains or losses for the period included in earnings attributable to the change in unrealized gains or losses relating to level 3 assets still held at 3/31/08 is $(1,139,101). -------------------------------------------------------------------------------- 40 DIVIDEND REINVESTMENT AND CASH 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 investment 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 then 30 days) before the payment date of a dividend or distributions. Cash contributions must be received by the Transfer Agent at least five days (but no more then 30 days) before the payment date of a dividend or distributions. Whenever the Trust declares a dividend payable in cash or shares, the Transfer Agent, acting on behalf of each participating shareholder, will take the dividend in shares only if the net asset value is lower than the market price plus an estimated brokerage commission as of the close of business on the valuation day. The valuation day is the last day preceding the day of dividend payment. When the dividend is to be taken in shares, the number of shares to be received is determined by dividing the cash dividend by the net asset value as of the close of business on the valuation date or, if greater than net asset value, 95% of the closing share price. If the net asset value of the shares is higher than the market value plus an estimated commission, the Transfer Agent, consistent with obtaining the best price and execution, will buy shares on the open market at current prices promptly after the dividend payment date. The reinvestment of dividends does not, in anyway, 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. MEMBERS OF THE BOARD OF TRUSTEES Donald Glickman Robert E. Joyal William J. Barrett Michael H. Brown Donald E. Benson* Dr. Corine T. Norgaard* Roger W. Crandall Martin T. Hart* Maleyne M. Syracuse *Member of the Audit committee OFFICERS Roger W. Crandall Chairman Clifford M. Noreen President James M. Roy Vice President & Chief Financial Officer Rodney J. Dillman Vice President, Secretary & Chief Legal Officer Jill A. Fields Vice President Michael P. Hermsen Vice President Mary Wilson Kibbe Vice President Michael L. Klofas Vice President Richard E. Spencer, II Vice President Ronald S. Talaia Treasurer John T. Davitt, Jr. Comptroller Melissa M. LaGrant Chief Compliance Officer MassMutual Corporate Investors -------------------------------------------------------------------------------- [LOGO] MASSMUTUAL CORPORATE INVESTORS CI3022