X0202 4 2005-03-01 0001068796 MAXYGEN INC MAXY 0001101713 RINGOLD GORDON C/O MAXYGEN, INC. 515 GALVESTON DRIVE REDWOOD CITY CA 94063 1 0 0 0 Common Stock 2005-03-01 4 S 0 200 9.70 D 406796 I Trust Common Stock 2005-03-01 4 S 0 255 9.68 D 406541 I Trust Common Stock 2005-03-01 4 S 0 100 9.66 D 406441 I Trust Common Stock 2005-03-01 4 S 0 100 9.65 D 406341 I Trust Common Stock 2005-03-01 4 S 0 200 9.61 D 406141 I Trust Common Stock 2005-03-01 4 S 0 100 9.60 D 406041 I Trust Common Stock 2005-03-01 4 S 0 65 9.59 D 405976 I Trust Common Stock 2005-03-01 4 S 0 200 9.58 D 405776 I Trust Common Stock 2005-03-01 4 S 0 200 9.57 D 405576 I Trust Common Stock 2005-03-01 4 S 0 65 9.56 D 405511 I Trust Common Stock 2005-03-01 4 S 0 50 9.53 D 405461 I Trust Common Stock 2005-03-01 4 S 0 350 9.52 D 405111 I Trust Common Stock 2005-03-01 4 S 0 200 9.515 D 404911 I Trust Common Stock 2005-03-01 4 S 0 400 9.51 D 404511 I Trust Common Stock 2005-03-01 4 S 0 200 9.50 D 404311 I Trust Common Stock 2005-03-01 4 S 0 100 9.49 D 404211 I Trust Common Stock 2005-03-01 4 S 0 114 9.48 D 404097 I Trust Common Stock 2005-03-01 4 S 0 100 9.47 D 403997 I Trust Common Stock 2005-03-01 4 S 0 200 9.465 D 403797 I Trust Common Stock 2005-03-01 4 S 0 200 9.46 D 403597 I Trust Common Stock 2005-03-01 4 S 0 100 9.45 D 403497 I Trust Common Stock 2005-03-01 4 S 0 100 9.44 D 403397 I Trust Common Stock 2005-03-01 4 S 0 1 9.43 D 403396 I Trust Common Stock 2005-03-01 4 S 0 100 9.42 D 403296 I Trust Common Stock 2005-03-01 4 S 0 300 9.40 D 402996 I Trust The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 25, 2004. Gordon Ringold and Tanya Zarucki 1999 Trust Paul Quinlan - Attorney-in-fact 2005-03-01