EcoR1 Capital, LLC

Q1 2018 13F Holdings Report, Stock Holdings

Notable people: Oleg Nodelman
Signature - Title: Oleg Nodelman - Manager
Location: San Francisco, CA
Holdings as of: 31 Mar 2018
Value $: $933,286,000
Num holdings: 27
Filing time: 15 May 2018, 16:07:18 UTC
Form type: 13F-HR
Description: All US holdings of this investor are reported in this report. Top holdings included ASMB, ASND, FGEN, IRWD, and KURA.
Previous filing: Q4 2017 - 14 Feb 2018
Next filing: Q2 2018 - 14 Aug 2018
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 2018 Q1 compared to 2017 Q4 by default. Changes are calculated vs the previous SEC filing.

Compare Q1 2018 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
Oleg Nodelman	Manager	San Francisco, California	15 May 2018