X0303 4 2009-10-20 0000275694 MASSMUTUAL CORPORATE INVESTORS MCI 0001333406 Brown Michael Harlan 1500 MAIN STREET P. O. BOX 15189 SPRINGFIELD MA 01115 1 Trustee Common Shares ("Shares of Beneficial Interest") 2009-10-20 4 P 0 300 25.2 A 3800 D Common Shares ("Shares of Beneficial Interest") 2009-10-21 4 P 0 200 25.2 A 4000 D Ann Malloy as Attorney-in-fact 2009-10-21