Stephanie Pittman - 05 Sep 2025 Form 4 Insider Report for ASPEN AEROGELS INC (ASPN)

Role
Chief Human Resources Officer
Signature
/s/ Stephanie Pittman, Attorney-in-Fact
Issuer symbol
ASPN
Transactions as of
05 Sep 2025
Net transactions value
-$10,450
Form type
4
Filing time
08 Sep 2025, 17:01:24 UTC
Previous filing
07 Mar 2025
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Pittman Stephanie Chief Human Resources Officer C/O ASPEN AEROGELS, INC.,, 30 FORBES ROAD, BLDG B, NORTHBOROUGH /s/ Stephanie Pittman, Attorney-in-Fact 08 Sep 2025 0001991670

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction ASPN Common Stock Tax liability $10,450 -1,581 -3.6% $6.61 42,257 05 Sep 2025 Direct F1, F2
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 1. Shares withheld by Registrant to satisfy minimum statutory tax withholding requirements on vesting of Restricted Stock Units ("RSUs").
F2 2. Represents 9,196 shares of Common Stock and 33,061 RSUs.

Remarks:

Power of Attorney is attached hereto as Exhibit 24.