Stephanie Pittman - 05 Mar 2024 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 Mar 2024
Net transactions value: $0
Form type: 4
Filing time: 07 Mar 2024, 16:53:29 UTC
Previous filing: 05 Sep 2023
Next filing: 09 Sep 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	+8,032	+50%	$0.000000	24,187	05 Mar 2024	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 Options (Right to Buy)	Award	$0	+35,249		$0.000000	35,249	05 Mar 2024	Common Stock	35,249	$16.34	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 March 5, 2025, an additional one-third of the shares on March 5, 2026 and the remaining one-third of the shares on March 5, 2027.
F2	Represents 24,187 RSUs.
F3	The options vest as to one-third of the shares on March 5, 2025, an additional one-third of the shares on March 5, 2026 and the remaining one-third of the shares on March 5, 2027.