DYNE THERAPEUTICS INC

Ticker: DYN CUSIP: 26818M108 Class: Common Stock

SBI Securities Co., Ltd.'s Holding History (CIK: 0001851815)

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

Q4 2025

Shares 150 Value ($000) $3 Avg Close $18.94 Range $12.33 - $25.00

Q3 2025

Shares 160 Value ($000) $2 Avg Close $11.41 Range $8.06 - $14.35

Q2 2025

Shares 99 Value ($000) $1 Avg Close $11.01 Range $6.36 - $15.23

Q1 2025

Shares 69 Value ($000) $1 Avg Close $14.30 Range $9.96 - $26.22

Q4 2024

Shares 19 Value ($000) $0 Avg Close $29.58 Range $23.05 - $35.90

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	150	$3	$18.94	$12.33 - $25.00
Q3 2025	160	$2	$11.41	$8.06 - $14.35
Q2 2025	99	$1	$11.01	$6.36 - $15.23
Q1 2025	69	$1	$14.30	$9.96 - $26.22
Q4 2024	19	$0	$29.58	$23.05 - $35.90