Donald R. Young - 08 Mar 2026 Form 4 Insider Report for ASPEN AEROGELS INC (ASPN)

Role
President and CEO, Director
Signature
/s/ Glenn Deegan, Attorney-in-Fact
Issuer symbol
ASPN
Transactions as of
08 Mar 2026
Net transactions value
$0
Form type
4
Filing time
10 Mar 2026, 17:00:04 UTC
Previous filing
06 Mar 2026
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Young Donald R President and CEO, Director C/O ASPEN AEROGELS, INC.,, 30 FORBES ROAD, BLDG B, NORTHBOROUGH /s/ Glenn Deegan, Attorney-in-Fact 10 Mar 2026 0001610257

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction ASPN Common Stock Tax liability -4,275 -0.67% $3.22* 637,834 08 Mar 2026 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 Represents 438,349 shares of Common Stock and 199,485 RSUs.