DYNE THERAPEUTICS INC

Ticker: DYN CUSIP: 26818M108 Class: Common Stock

MARTINGALE ASSET MANAGEMENT L P's Holding History (CIK: 0000936944)

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

Q4 2025

Shares 25,152 Value ($000) $492 Avg Close $18.94 Range $12.33 - $25.00

Q3 2025

Shares 27,050 Value ($000) $342 Avg Close $11.41 Range $8.06 - $14.35

Q1 2023

Shares 10,441 Value ($000) $120 Avg Close $12.99 Range $10.71 - $15.60

Q4 2022

Shares 35,266 Value ($000) $409 Avg Close $11.57 Range $9.06 - $14.55

Q4 2021

Shares 31,814 Value ($000) $379 Avg Close $14.05 Range $11.56 - $16.48

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	25,152	$492	$18.94	$12.33 - $25.00
Q3 2025	27,050	$342	$11.41	$8.06 - $14.35
Q1 2023	10,441	$120	$12.99	$10.71 - $15.60
Q4 2022	35,266	$409	$11.57	$9.06 - $14.55
Q4 2021	31,814	$379	$14.05	$11.56 - $16.48