X0202 4 2006-09-01 0 0000882095 GILEAD SCIENCES INC GILD 0001334682 Alton Gregg H GILEAD SCIENCES, INC. 333 LAKESIDE DRIVE FOSTER CITY CA 94404 0 1 0 0 SVP, General Counsel Common Stock 2006-09-01 4 S 0 100 63.13 D 28386 D Common Stock 2006-09-01 4 S 0 100 63.19 D 28286 D Common Stock 2006-09-01 4 S 0 100 63.32 D 28186 D Common Stock 2006-09-01 4 S 0 200 63.35 D 27986 D Common Stock 2006-09-01 4 S 0 100 63.38 D 27886 D Common Stock 2006-09-01 4 S 0 100 63.40 D 27786 D Common Stock 2006-09-01 4 S 0 200 63.41 D 27586 D Common Stock 2006-09-01 4 S 0 100 63.45 D 27486 D Common Stock 2006-09-01 4 S 0 100 63.48 D 27386 D Common Stock 2006-09-01 4 S 0 100 63.49 D 27286 D Common Stock 2006-09-01 4 S 0 100 63.50 D 27186 D Common Stock 2006-09-01 4 S 0 100 63.51 D 27086 D Common Stock 2006-09-01 4 S 0 100 63.54 D 26986 D Common Stock 2006-09-01 4 S 0 100 63.56 D 26886 D Common Stock 2006-09-01 4 S 0 250 63.64 D 26636 D Common Stock 2006-09-01 4 S 0 354 63.66 D 26282 D Common Stock 2006-09-01 4 S 0 100 63.68 D 26182 D Common Stock 2006-09-01 4 S 0 100 63.69 D 26082 D Common Stock 2006-09-01 4 S 0 546 63.70 D 25536 D Common Stock 2006-09-01 4 S 0 100 63.75 D 25436 D Common Stock 2006-09-01 4 S 0 100 63.79 D 25336 D Common Stock 2006-09-01 4 S 0 100 63.80 D 25236 D Common Stock 2006-09-01 4 S 0 100 63.84 D 25136 D Common Stock 2006-09-01 4 S 0 100 63.85 D 25036 D Common Stock 2006-09-01 4 S 0 100 63.91 D 24936 D The transactions reported in this Form 4 are made pursuant to a Rule 10b5-1 trading plan established by Mr. Alton on August 4, 2006. /s/Matthew K. Au, by Power of Attorney for Gregg H. Alton 2006-09-05