DYNE THERAPEUTICS INC

Ticker: DYN CUSIP: 26818M108 Class: Common Stock

Mariner, LLC's Holding History (CIK: 0001373442)

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

Q3 2025

Shares 19,541 Value ($000) $247 Avg Close $11.41 Range $8.06 - $14.35

Q2 2025

Shares 11,953 Value ($000) $114 Avg Close $11.01 Range $6.36 - $15.23

Q1 2025

Shares 25,652 Value ($000) $268 Avg Close $14.30 Range $9.96 - $26.22

Q4 2024

Shares 11,157 Value ($000) $263 Avg Close $29.58 Range $23.05 - $35.90

Q3 2024

Shares 12,824 Value ($000) $461 Avg Close $39.80 Range $23.55 - $47.45

Q2 2024

Shares 10,969 Value ($000) $387 Avg Close $29.06 Range $23.11 - $36.60

Q1 2024

Shares 9,745 Value ($000) $277 Avg Close $22.62 Range $12.33 - $30.27

Period	Shares	Value ($000)	Average Close	Price Range
Q3 2025	19,541	$247	$11.41	$8.06 - $14.35
Q2 2025	11,953	$114	$11.01	$6.36 - $15.23
Q1 2025	25,652	$268	$14.30	$9.96 - $26.22
Q4 2024	11,157	$263	$29.58	$23.05 - $35.90
Q3 2024	12,824	$461	$39.80	$23.55 - $47.45
Q2 2024	10,969	$387	$29.06	$23.11 - $36.60
Q1 2024	9,745	$277	$22.62	$12.33 - $30.27