Polaris Venture Management Co. VI, L.L.C.

Q1 2016 13F Holdings Report, Stock Holdings

Signature - Title: Mary Blair - Authorized Signatory
Location: Boston, MA
Holdings as of: 31 Mar 2016
Value $: $167M
Num holdings: 2
Date filed: 13 May 2016, 13:34
Form type: 13F-HR
Description: All US holdings of this investor are reported in this report. Top holdings included EDIT and RPD.
Next filing: Q2 2016 - 15 Aug 2016
SEC: View on sec.gov

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

Compare Q1 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
Mary Blair	Authorized Signatory	Boston, Massachusetts	13 May 2016