EcoR1 Capital, LLC

Q2 2016 13F Holdings Report, Stock Holdings

Notable people: Oleg Nodelman
Signature - Title: Sarah Marriott - GC/CCO
Location: San Francisco, CA
Holdings as of: 30 Jun 2016
Value $: $219,175,000
Num holdings: 27
Filing time: 15 Aug 2016, 12:02:46 UTC
Form type: 13F-HR
Description: All US holdings of this investor are reported in this report. Top holdings included IRWD, GLPG, RTRX, CYTK, and ASMB.
Previous filing: Q1 2016 - 16 May 2016
Next filing: Q3 2016 - 14 Nov 2016
SEC: View on sec.gov
Options Holdings: Showing stock holdings, see here for options holdings

Sym	Weight	Trade Impact	Company	Class	Share Change	Activity	Value Change $	Value $	* Price $	Shares	Principal

Filing 2016 Q2 compared to 2016 Q1 by default. Changes are calculated vs the previous SEC filing.

Compare Q2 2016 to

* Reported Price is the price of the security as of the portfolio date. This value is significant in that it is the last known price at which the security was still held.
An asterisk sign (*) next to the price indicates that the price is likely invalid.

Person Signing this Report on Behalf of Reporting Manager:

Name	Title	City, State	Date
Sarah Marriott	GC/CCO	San Francisco, California	15 Aug 2016