DYNE THERAPEUTICS INC

Ticker: DYN CUSIP: 26818M108 Class: Common Stock

EVENTIDE ASSET MANAGEMENT, LLC's Holding History (CIK: 0001442891)

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

Q4 2025

Shares 680,305 Value ($000) $13,306 Avg Close $18.94 Range $12.33 - $25.00

Q4 2024

Shares 332,277 Value ($000) $7,828 Avg Close $29.58 Range $23.05 - $35.90

Q3 2024

Shares 332,277 Value ($000) $11,935 Avg Close $39.80 Range $23.55 - $47.45

Q2 2024

Shares 485,000 Value ($000) $17,116 Avg Close $29.06 Range $23.11 - $36.60

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	680,305	$13,306	$18.94	$12.33 - $25.00
Q4 2024	332,277	$7,828	$29.58	$23.05 - $35.90
Q3 2024	332,277	$11,935	$39.80	$23.55 - $47.45
Q2 2024	485,000	$17,116	$29.06	$23.11 - $36.60