Editas Medicine, Inc. — Director's Dealing 2016

Feb 3, 2016

SEC Form 3 — Initial Statement of Beneficial Ownership

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

Reporting Person: Joung J. Keith (10% Owner)

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	480769	Indirect

Holdings (Derivative)

Security	Exercise Price	Expiration	Underlying	Shares	Ownership
Stock Option (right to buy)	$6.48	2025-09-13	Common Stock (96153)		Direct

Footnotes

F1: These shares are restricted stock owned by MMK Tech LLC ("MMK") and issued pursuant to a restricted stock agreement between the Issuer and MMK. Twenty-five percent of the shares vested on November 21, 2013, and the remainder are scheduled to vest in equal monthly installments from August 1, 2013 until August 1, 2017.

F2: The shares are held directly by MMK. The sole managing member of MMK is the Jae Keith Joung 2007 Revocable Trust (the "Trust"). J. Keith Joung is a trustee of the Trust and therefore may be deemed to beneficially own the shares held by MMK.

F3: This option was granted on September 14, 2015 and is scheduled to vest over four years with the shares scheduled to vest in equal quarterly installments beginning on December 10, 2015.