Stephanie Pittman - 05 Sep 2023 Form 4 Insider Report for ASPEN AEROGELS INC (ASPN)

Role: Chief Human Resources Officer
Signature: /s/ Virginia H. Johnson, Attorney-in-Fact
Issuer symbol: ASPN
Transactions as of: 05 Sep 2023
Net transactions value: $0
Form type: 4
Filing time: 06 Sep 2023, 11:00:19 UTC
Next filing: 07 Mar 2024
SEC: View on sec.gov

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	ASPN	Common Stock	Award	$0	+16,155		$0.000000	16,155	05 Sep 2023	Direct	F1, F2

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	ASPN	Stock Option (Right to Buy)	Award	$0	+72,754		$0.000000	72,754	05 Sep 2023	Common Stock	72,754	$6.19	Direct	F3

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

Explanation of Responses:

Id	Content
F1	Each Restricted Stock Unit ("RSU") represents the right to receive one share of Common Stock upon vesting. The RSUs vest as to one-third of the shares on September 5, 2024, an additional one-third of the shares on September 5, 2025, and the remaining one-third of the shares on September 5, 2026.
F2	Represents 16,155 RSUs.
F3	The options vest as to one-third of the shares on September 5, 2024, an additional one-third of the shares on September 5, 2025, and the remaining one-third of the shares on September 5, 2026.