DYNE THERAPEUTICS INC

Ticker: DYN CUSIP: 26818M108 Class: Common Stock

MASSMUTUAL TRUST CO FSB/ADV's Holding History (CIK: 0001103653)

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

Q4 2025

Shares 243 Value ($000) $5 Avg Close $18.94 Range $12.33 - $25.00

Q3 2025

Shares 243 Value ($000) $3 Avg Close $11.41 Range $8.06 - $14.35

Q2 2025

Shares 243 Value ($000) $2 Avg Close $11.01 Range $6.36 - $15.23

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	243	$5	$18.94	$12.33 - $25.00
Q3 2025	243	$3	$11.41	$8.06 - $14.35
Q2 2025	243	$2	$11.01	$6.36 - $15.23