Susanna Gatti High - Jun 13, 2023 Form 4 Insider Report for Dyne Therapeutics, Inc. (DYN)

Role: Chief Operating Officer
Signature: /s/ Richard Scalzo, Attorney-in-Fact
Stock symbol: DYN
Transactions as of: Jun 13, 2023
Transactions value $: -$20,199
Form type: 4
Date filed: 6/14/2023, 06:40 PM
Previous filing: Mar 15, 2023
Next filing: Sep 13, 2023

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	DYN	Common Stock	Sale	-$20.2K	-1.63K	-1.47%	$12.43	109K	Jun 13, 2023	Direct	F1, F2

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Represents shares automatically sold by the Reporting Person to satisfy tax withholding obligations in connection with the vesting of restricted stock units granted to the Reporting Person on December 10, 2021 and December 9, 2022. The automatic sale of the Reporting Person's shares is provided for in a restricted stock unit agreement constituting a "binding contract" consistent with the affirmative defense to liability under Rule 10b5-1 and the sale does not represent a discretionary trade by the Reporting Person.
F2	Includes 81,652 unvested RSUs.

Content

Represents shares automatically sold by the Reporting Person to satisfy tax withholding obligations in connection with the vesting of restricted stock units granted to the Reporting Person on December 10, 2021 and December 9, 2022. The automatic sale of the Reporting Person's shares is provided for in a restricted stock unit agreement constituting a "binding contract" consistent with the affirmative defense to liability under Rule 10b5-1 and the sale does not represent a discretionary trade by the Reporting Person.

Includes 81,652 unvested RSUs.