DYNE THERAPEUTICS INC

Ticker: DYN CUSIP: 26818M108 Class: Common Stock

BlackRock, Inc.'s Holding History (CIK: 0002012383)

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

Q4 2025

Shares 11,190,838 Value ($000) $218,893 Avg Close $18.94 Range $12.33 - $25.00

Q3 2025

Shares 9,634,909 Value ($000) $121,882 Avg Close $11.41 Range $8.06 - $14.35

Q2 2025

Shares 8,078,428 Value ($000) $76,907 Avg Close $11.01 Range $6.36 - $15.23

Q1 2025

Shares 8,046,938 Value ($000) $84,171 Avg Close $14.30 Range $9.96 - $26.22

Q4 2024

Shares 7,949,402 Value ($000) $187,288 Avg Close $29.58 Range $23.05 - $35.90

Q3 2024

Shares 7,794,114 Value ($000) $279,965 Avg Close $39.80 Range $23.55 - $47.45

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	11,190,838	$218,893	$18.94	$12.33 - $25.00
Q3 2025	9,634,909	$121,882	$11.41	$8.06 - $14.35
Q2 2025	8,078,428	$76,907	$11.01	$6.36 - $15.23
Q1 2025	8,046,938	$84,171	$14.30	$9.96 - $26.22
Q4 2024	7,949,402	$187,288	$29.58	$23.05 - $35.90
Q3 2024	7,794,114	$279,965	$39.80	$23.55 - $47.45