DYNE THERAPEUTICS INC

Ticker: DYN CUSIP: 26818M108 Class: Common Stock

Summit Rock Advisors, LP's Holding History (CIK: 0001540951)

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

Q2 2022

Shares 34,887 Value ($000) $240 Avg Close $6.89 Range $4.30 - $11.21

Q1 2022

Shares 34,887 Value ($000) $336 Avg Close $8.51 Range $6.39 - $12.66

Q4 2021

Shares 34,887 Value ($000) $415 Avg Close $14.05 Range $11.56 - $16.48

Period	Shares	Value ($000)	Average Close	Price Range
Q2 2022	34,887	$240	$6.89	$4.30 - $11.21
Q1 2022	34,887	$336	$8.51	$6.39 - $12.66
Q4 2021	34,887	$415	$14.05	$11.56 - $16.48