GILEAD SCIENCES INC

Ticker: GILD CUSIP: 375558103 Class: COM

Casdin Capital, LLC's Holding History (CIK: 0001534261)

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

Q1 2020

Shares 175,000 Value ($000) $13,083 Avg Close $54.92 Range $49.36 - $68.82

Q1 2019

Shares 80,000 Value ($000) $5,201 Avg Close $50.86 Range $46.97 - $53.84

Q4 2017

Shares 30,000 Value ($000) $2,149 Avg Close $55.90 Range $51.50 - $61.93

Q2 2017

Shares 75,000 Value ($000) $5,309 Avg Close $48.32 Range $46.30 - $52.73

Q4 2016

Shares 12,500 Value ($000) $895 Avg Close $53.19 Range $50.62 - $57.18

Period	Shares	Value ($000)	Average Close	Price Range
Q1 2020	175,000	$13,083	$54.92	$49.36 - $68.82
Q1 2019	80,000	$5,201	$50.86	$46.97 - $53.84
Q4 2017	30,000	$2,149	$55.90	$51.50 - $61.93
Q2 2017	75,000	$5,309	$48.32	$46.30 - $52.73
Q4 2016	12,500	$895	$53.19	$50.62 - $57.18