DYNE THERAPEUTICS INC

Ticker: DYN CUSIP: 26818M108 Class: Common Stock

Rockefeller Capital Management L.P.'s Holding History (CIK: 0001739439)

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

Q4 2025

Shares 14,268 Value ($000) $279 Avg Close $18.94 Range $12.33 - $25.00

Q3 2025

Shares 8,538 Value ($000) $108 Avg Close $11.41 Range $8.06 - $14.35

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	14,268	$279	$18.94	$12.33 - $25.00
Q3 2025	8,538	$108	$11.41	$8.06 - $14.35