MassMutual Corporate Investors Announces Notice of Annual Shareholder Meeting / STOCK SPLIT NOTICE

SPRINGFIELD, Ma., Jan. 26, 2011 /PRNewswire/ -- At their quarterly meeting held on January 21, 2011, the Board of Trustees of MassMutual Corporate Investors (the "Trust") announced that the annual shareholders' meeting will be held on Friday, April 15, 2011 at 1:30 PM at Massachusetts Mutual Life Insurance Company, 1295 State Street, Springfield, MA. Shareholders of record at the close of business on February 14, 2011 will be entitled to vote at the meeting.

In addition to reviewing the Trust's performance during the past year, the shareholders will be asked to vote on the following matter at the April shareholder meeting:

-- Election of three members of the Trust's Board of Trustees - Michael H. Brown, Dr. Corine T. Norgaard and Maleyne M. Syracuse.

At their quarterly meeting the Trustees determined that the Trust's net asset value as of December 31, 2010, was $237,363,248 or $25.10 per share based on 9,456,638 shares outstanding (compared with preliminary net asset value of $237,151,491 or $25.08 per share reported on January 6, 2011). Net investment income of the Trust for the year ended December 31, 2010, was $21,340,894 or $2.26 per share (compared to preliminary net investment income of $21,353,281 or $2.26 per share reported on January 6, 2011). All figures for 2010 are unaudited.

At the January 21, 2011 meeting, the Trustees also declared a two-for-one stock split payable in the form of a stock dividend. As a result of the stock split, the Trust will distribute one additional share of its common stock to all shareholders of record at the close of business on February 4, 2011 for each share of the Trust's common stock held on that date. Each shareholder will hold the same percentage of the Trust's outstanding shares immediately following the stock split as such shareholder held immediately prior to the stock split. The additional shares will be distributed on February 18, 2011. The Trust currently has 9,476,093 shares outstanding and, after giving effect to the stock split, will have 18,952,186 shares outstanding.

MassMutual Corporate Investors is a closed-end management investment company advised by Babson Capital Management LLC. Its shares are traded on the New York Stock Exchange under the trading symbol ("MCI").

Per share amounts are rounded to the nearest cent.

Cautionary Notice: Certain statements contained in this press release may be "forward looking" statements. Investors are cautioned not to place undue reliance on forward-looking statements, which speak only as of the date on which they are made and which reflect management's current estimates, projections, expectations or beliefs, and which are subject to risks and uncertainties that may cause actual results to differ materially. These statements are subject to change at any time based upon economic, market or other conditions and may not be relied upon as investment advice or an indication of the fund's trading intent. References to specific securities are not recommendations of such securities, and may not be representative of the fund's current or future investments. We undertake no obligation to publicly update forward looking statements, whether as a result of new information, future events, or otherwise.

Contact: Marty McDonough [phone]

[e-mail]

MassMutual Corporate Investors

CONTACT: Marty McDonough, [phone], [e-mail]