X0306 4 2015-01-29 0 0000949039 DIAMOND OFFSHORE DRILLING INC DO 0001600577 Edwards Marc Gerard Rex 15415 KATY FREEWAY SUITE 100 HOUSTON TX 77094 1 1 0 0 President and C.E.O. Restricted Stock Units 2015-01-29 4 A 0 55662 0.00 A Common Stock 55662 55662 D Each restricted stock unit represents a contingent right to receive one share of common stock. Includes 3,081 restricted stock units credited as a result of payment of cash dividends in respect of the common stock prior to vesting. The restricted stock units vest in three equal annual installments beginning March 3, 2015. One share of common stock will be delivered with respect to each vested restricted stock unit within 30 days after the applicable vesting date. /s/ Terence W. Waldorf Attorney-in-Fact for Marc Edwards 2015-02-02