X0202 4 2007-03-01 0001068796 MAXYGEN INC MAXY 0001101713 RINGOLD GORDON C/O MAXYGEN, INC. 515 GALVESTON DRIVE REDWOOD CITY CA 94063 1 0 0 0 Common Stock 2007-03-01 4 S 0 200 11.02 D 334796 I Trust Common Stock 2007-03-01 4 S 0 200 10.99 D 334596 I Trust Common Stock 2007-03-01 4 S 0 300 10.97 D 334296 I Trust Common Stock 2007-03-01 4 S 0 300 10.96 D 333996 I Trust Common Stock 2007-03-01 4 S 0 100 10.95 D 333896 I Trust Common Stock 2007-03-01 4 S 0 219 10.94 D 333677 I Trust Common Stock 2007-03-01 4 S 0 181 10.93 D 333496 I Trust Common Stock 2007-03-01 4 S 0 100 10.92 D 333396 I Trust Common Stock 2007-03-01 4 S 0 400 10.91 D 332996 I Trust Common Stock 2007-03-01 4 S 0 300 10.90 D 332696 I Trust Common Stock 2007-03-01 4 S 0 400 10.89 D 332296 I Trust Common Stock 2007-03-01 4 S 0 200 10.88 D 332096 I Trust Common Stock 2007-03-01 4 S 0 100 10.87 D 331996 I Trust Common Stock 2007-03-01 4 S 0 300 10.86 D 331696 I Trust Common Stock 2007-03-01 4 S 0 100 10.85 D 331596 I Trust Common Stock 2007-03-01 4 S 0 200 10.83 D 331396 I Trust Common Stock 2007-03-01 4 S 0 100 10.82 D 331296 I Trust Common Stock 2007-03-01 4 S 0 200 10.81 D 331096 I Trust Common Stock 2007-03-01 4 S 0 200 10.80 D 330896 I Trust Common Stock 2007-03-01 4 S 0 100 10.78 D 330796 I Trust Common Stock 2007-03-01 4 S 0 400 10.77 D 330396 I Trust Common Stock 2007-03-01 4 S 0 200 10.76 D 330196 I Trust Common Stock 2007-03-01 4 S 0 200 10.75 D 329996 I Trust The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 2, 2006. Gordon Ringold and Tanya Zarucki 1999 Trust John Borkholder - Attorney-in-fact 2007-03-05