DYNE THERAPEUTICS INC

Ticker: DYN CUSIP: 26818M108 Class: Common Stock

SummitTX Capital, L.P.'s Holding History (CIK: 0002052310)

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

Q4 2025

Shares 243,276 Value ($000) $4,758 Avg Close $18.94 Range $12.33 - $25.00

Q3 2025

Shares 132,900 Value ($000) $1,681 Avg Close $11.41 Range $8.06 - $14.35

Q2 2025

Shares 118,961 Value ($000) $1,133 Avg Close $11.01 Range $6.36 - $15.23

Q1 2025

Shares 129,858 Value ($000) $1,358 Avg Close $14.30 Range $9.96 - $26.22

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	243,276	$4,758	$18.94	$12.33 - $25.00
Q3 2025	132,900	$1,681	$11.41	$8.06 - $14.35
Q2 2025	118,961	$1,133	$11.01	$6.36 - $15.23
Q1 2025	129,858	$1,358	$14.30	$9.96 - $26.22