CYTOKINETICS INC

Ticker: CYTK CUSIP: 23282W605 Class: EQTY

EcoR1 Capital, LLC's Holding History (CIK: 0001587114)

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

Q4 2016

Shares 54,879 Value ($000) $667 Avg Close $10.61 Range $8.77 - $12.75

Q3 2016

Shares 846,654 Value ($000) $7,772 Avg Close $10.44 Range $8.51 - $12.98

Q2 2016

Shares 2,139,697 Value ($000) $20,306 Avg Close $8.21 Range $6.92 - $10.13

Q1 2016

Shares 2,052,800 Value ($000) $14,472 Avg Close $7.31 Range $6.00 - $10.71

Q4 2015

Shares 1,418,700 Value ($000) $14,840 Avg Close $9.81 Range $6.44 - $13.18

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2016	54,879	$667	$10.61	$8.77 - $12.75
Q3 2016	846,654	$7,772	$10.44	$8.51 - $12.98
Q2 2016	2,139,697	$20,306	$8.21	$6.92 - $10.13
Q1 2016	2,052,800	$14,472	$7.31	$6.00 - $10.71
Q4 2015	1,418,700	$14,840	$9.81	$6.44 - $13.18