X0202 4 2004-07-01 0001068796 MAXYGEN INC MAXY 0001101713 RINGOLD GORDON C/O MAXYGEN, INC. 515 GALVESTON DRIVE REDWOOD CITY CA 94063 1 0 0 0 Common Stock 2004-07-01 4 S 0 205 10.46 D 443926 I Trust Common Stock 2004-07-01 4 S 0 174 10.44 D 443752 I Trust Common Stock 2004-07-01 4 S 0 288 10.43 D 443464 I Trust Common Stock 2004-07-01 4 S 0 1302 10.42 D 442162 I Trust Common Stock 2004-07-01 4 S 0 789 10.41 D 441373 I Trust Common Stock 2004-07-01 4 S 0 200 10.38 D 441173 I Trust Common Stock 2004-07-01 4 S 0 100 10.37 D 441073 I Trust Common Stock 2004-07-01 4 S 0 34 10.34 D 441039 I Trust Common Stock 2004-07-01 4 S 0 157 10.32 D 440882 I Trust Common Stock 2004-07-01 4 S 0 143 10.31 D 440739 I Trust Common Stock 2004-07-01 4 S 0 100 10.25 D 440639 I Trust Common Stock 2004-07-01 4 S 0 100 10.21 D 440539 I Trust Common Stock 2004-07-01 4 S 0 261 10.20 D 440278 I Trust Common Stock 2004-07-01 4 S 0 147 10.19 D 440131 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 February 25, 2004. Gordon Ringold and Tanya Zarucki 1999 Trust Paul Quinlan - Attorney-in-fact 2004-07-01