DYNE THERAPEUTICS INC

Ticker: DYN CUSIP: 26818M108 Class: Common Stock

T. Rowe Price Investment Management, Inc.'s Holding History (CIK: 0001897612)

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

Q4 2025

Shares 2,870,568 Value ($000) $56 Avg Close $18.94 Range $12.33 - $25.00

Q3 2025

Shares 2,812,422 Value ($000) $36 Avg Close $11.41 Range $8.06 - $14.35

Q2 2025

Shares 1,793,590 Value ($000) $17 Avg Close $11.01 Range $6.36 - $15.23

Q1 2025

Shares 1,167,975 Value ($000) $12 Avg Close $14.30 Range $9.96 - $26.22

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	2,870,568	$56	$18.94	$12.33 - $25.00
Q3 2025	2,812,422	$36	$11.41	$8.06 - $14.35
Q2 2025	1,793,590	$17	$11.01	$6.36 - $15.23
Q1 2025	1,167,975	$12	$14.30	$9.96 - $26.22