DYNE THERAPEUTICS INC

Ticker: DYN CUSIP: 26818M108 Class: Common Stock

NATIONAL BANK OF CANADA /FI/'s Holding History (CIK: 0000926171)

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

Q4 2025

Shares 200 Value ($000) $4 Avg Close $18.94 Range $12.33 - $25.00

Q3 2025

Shares 150 Value ($000) $2 Avg Close $11.41 Range $8.06 - $14.35

Q2 2025

Shares 51 Value ($000) $0 Avg Close $11.01 Range $6.36 - $15.23

Q1 2025

Shares 1 Value ($000) $0 Avg Close $14.30 Range $9.96 - $26.22

Q3 2024

Shares 1 Value ($000) $0 Avg Close $39.80 Range $23.55 - $47.45

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	200	$4	$18.94	$12.33 - $25.00
Q3 2025	150	$2	$11.41	$8.06 - $14.35
Q2 2025	51	$0	$11.01	$6.36 - $15.23
Q1 2025	1	$0	$14.30	$9.96 - $26.22
Q3 2024	1	$0	$39.80	$23.55 - $47.45