Editas Medicine, Inc. — Director's Dealing 2016

Feb 9, 2016

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Editas Medicine, Inc. (EDIT)
CIK: 0001650664
Period of Report: 2016-02-08

Reporting Person: Nikolic Boris (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2016-02-08	Common Stock	C	2649572	—	Acquired	2649572	Indirect

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2016-02-08	Series B Preferred Stock	$	C	6888888	Acquired		Common Stock (2649572)	Indirect

Footnotes

F1: The Series B Preferred Stock converted into Common Stock on a 2.6-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Series B Preferred Stock wasconvertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The shares had no expiration date.

F2: These shares are owned by bng0, LLC. Boris Nikolic, as a member and the managing director of bng0, LLC, has voting and investment power over such shares and may be deemed the indirect beneficial owner of such shares. Boris Nikolic disclaims beneficial ownership over such shares, except to the extent of any pecuniary interest therein.