Erik Ostrowski - Feb 1, 2024 Form 4 Insider Report for AVROBIO, Inc. (AVRO)

Role: Interim CEO, President and CFO
Signature: /s/ Steven Avruch, Attorney-in-Fact for Erik Ostrowski
Stock symbol: AVRO
Transactions as of: Feb 1, 2024
Transactions value $: -$15,745
Form type: 4
Date filed: 2/5/2024, 07:57 PM
Previous filing: Jul 3, 2023
Next filing: Jun 26, 2024

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	AVRO	Common Stock	Options Exercise	$0	+40.1K	+1742.78%	$0.00	42.4K	Feb 1, 2024	Direct
transaction	AVRO	Common Stock	Tax liability	-$15.7K	-13.1K	-30.91%	$1.20	29.3K	Feb 5, 2024	Direct

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	AVRO	Restricted Stock Unit	Options Exercise	$0	-40.1K	-25%	$0.00	120K	Feb 1, 2024	Common Stock	40.1K	$0.00	Direct	F1

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

Explanation of Responses:

Id	Content
F1	The shares subject to the RSU shall vest over 4 years, with 25% vesting annually on each anniversary of the Vesting Commencement Date of February 1, 2023.