GILEAD SCIENCES INC

Ticker: GILD CUSIP: 375558103 Class: COM

BAKER BROS. ADVISORS LP's Holding History (CIK: 0001263508)

Note: Option positions (PUT/CALL) are excluded.

Q4 2015

Shares 249,995 Value ($000) $25,297 Avg Close $72.90 Range $66.06 - $77.78

Q3 2015

Shares 249,995 Value ($000) $24,547 Avg Close $77.50 Range $59.97 - $83.93

Q2 2015

Shares 249,995 Value ($000) $29,269 Avg Close $75.98 Range $66.27 - $86.02

Q1 2015

Shares 249,995 Value ($000) $24,532 Avg Close $70.55 Range $64.74 - $74.87

Q4 2014

Shares 256,108 Value ($000) $24,141 Avg Close $71.85 Range $59.71 - $81.17

Q3 2014

Shares 256,108 Value ($000) $27,263 Avg Close $68.03 Range $57.89 - $76.87

Q2 2014

Shares 256,108 Value ($000) $21,234 Avg Close $54.08 Range $44.12 - $58.67

Q1 2014

Shares 556,108 Value ($000) $39,406 Avg Close $54.49 Range $46.99 - $58.97

Q4 2013

Shares 556,108 Value ($000) $41,764 Avg Close $48.38 Range $40.86 - $52.88

Q3 2013

Shares 1,245,800 Value ($000) $78,323 Avg Close $41.52 Range $35.72 - $44.98

Q2 2013

Shares 1,245,800 Value ($000) $63,872 Avg Close $36.21 Range $32.33 - $40.34

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2015	249,995	$25,297	$72.90	$66.06 - $77.78
Q3 2015	249,995	$24,547	$77.50	$59.97 - $83.93
Q2 2015	249,995	$29,269	$75.98	$66.27 - $86.02
Q1 2015	249,995	$24,532	$70.55	$64.74 - $74.87
Q4 2014	256,108	$24,141	$71.85	$59.71 - $81.17
Q3 2014	256,108	$27,263	$68.03	$57.89 - $76.87
Q2 2014	256,108	$21,234	$54.08	$44.12 - $58.67
Q1 2014	556,108	$39,406	$54.49	$46.99 - $58.97
Q4 2013	556,108	$41,764	$48.38	$40.86 - $52.88
Q3 2013	1,245,800	$78,323	$41.52	$35.72 - $44.98
Q2 2013	1,245,800	$63,872	$36.21	$32.33 - $40.34