Corby C. Whitaker - 04 Mar 2026 Form 4 Insider Report for ASPEN AEROGELS INC (ASPN)

Role
SVP, Sales and Marketing
Signature
/s/ Glenn Deegan, Attorney-in-Fact
Issuer symbol
ASPN
Transactions as of
04 Mar 2026
Net transactions value
$0
Form type
4
Filing time
06 Mar 2026, 17:00:11 UTC
Previous filing
11 Mar 2025
Next filing
10 Mar 2026
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Whitaker Corby C SVP, Sales and Marketing C/O ASPEN AEROGELS, INC.,, 30 FORBES ROAD, BLDG B, NORTHBOROUGH /s/ Glenn Deegan, Attorney-in-Fact 06 Mar 2026 0001610273

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction ASPN Common Stock Award +57,462 +37% $0.000000* 211,146 04 Mar 2026 Direct F1
transaction ASPN Common Stock Tax liability -3,907 -1.9% $3.27* 207,239 05 Mar 2026 Direct F2, F3

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 +77,824 $0.000000* 77,824 04 Mar 2026 Common Stock 77,824 $3.35 Direct F4
* 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 4, 2027, an additional one-third of the shares on March 4, 2028 and the remaining one-third of the shares on March 4, 2029.
F2 Shares withheld by Registrant to satisfy the minimum statutory tax withholding requirements on vesting of Restricted Stock Units ("RSUs").
F3 Represents 124,588 shares of Common Stock and 82,651 RSUs.
F4 The options vest as to one-third of the shares on March 4, 2027, an additional one-third of the shares on March 4, 2028 and the remaining one-third of the shares on March 4, 2029.

Remarks:

Exhibit 24.1 - Power of Attorney