EcoR1 Capital, LLC

Q3 2016 13F Holdings Report, Stock Holdings

Notable people: OLEG NODELMAN
Signature - Title: Sarah Marriott - GC/CCO
Location: San Francisco, CA
Holdings as of: 30 Sep 2016
Value $: $262M
Num holdings: 25
Filing time: 14 Nov 2016, 16:34:17 UTC
Form type: 13F-HR
Description: All US holdings of this investor are reported in this report. Top holdings included IRWD, GLPG, ASMB, DERM, and ARDX.
Previous filing: Q2 2016 - 15 Aug 2016
Next filing: Q4 2016 - 15 Feb 2017
SEC: View on sec.gov
Options Holdings: Showing stock holdings, see here for options holdings

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

Filing 2016 Q3 compared to 2016 Q2 by default.

Compare Q3 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	11 Nov 2016