X0303 4 2010-08-26 0 0000275694 MASSMUTUAL CORPORATE INVESTORS mci 0001448864 Walsh Patricia J BABSON CAPITAL MANAGEMENT LLC 1500 MAIN STREET PO BOX 15189 SPRINGFIELD MA 01115 0 1 0 1 Officer of Adviser VP MassMutual Non-Qualified Thrift Plan 0 2010-08-26 4 J 0 11.8889 28.63 A Common Shares ("Shares of Beneficial Interest") 11.8889 386.399 D Babson Capital and MassMutual each offer a non-qualified compensation deferral plan where certain officers are permitted to defer a portion of their compensation into the plans. Deferred compensation into a plan is allocated among one or more investment options at the election of the plan participant. Each plan has an investment option that derives its value from the market value of MassMutual Corporate Investors' common shares (and includes the value of reinvested dividends). However, pursuant to the terms of the plans, neither the plans nor the participants have an actual ownership interest in the common shares. The shares beneficially owned include the number of shares of MassMutual Corporate Investors represented by the value of the MassMutual Corporate Investors investment option under the plan held by the plan participant. Exercisable only upon termination, retirement, or other plan permitted event. Plan holdings may be "liquidated" and reallocated into other plan investment options by the plan participant. The derivative has no actual securities underlying the plan agreement, which is entirely notional. Ann Malloy Attorney-in-fact 2010-08-30