EDITAS MEDICINE INC

Ticker: EDIT CUSIP: 28106W103 Class: Stock

HARBOURVEST PARTNERS LLC's Holding History (CIK: 0001201001)

Note: Option positions (PUT/CALL) are excluded.

Q2 2017

Shares 59,227 Value ($000) $994 Avg Close $18.02 Range $13.12 - $22.74

Q4 2016

Shares 36,362 Value ($000) $590 Avg Close $15.18 Range $12.43 - $18.94

Q3 2016

Shares 36,362 Value ($000) $490 Avg Close $20.49 Range $13.10 - $28.63

Period	Shares	Value ($000)	Average Close	Price Range
Q2 2017	59,227	$994	$18.02	$13.12 - $22.74
Q4 2016	36,362	$590	$15.18	$12.43 - $18.94
Q3 2016	36,362	$490	$20.49	$13.10 - $28.63