DEEGAN GLENN E. - 04 Mar 2026 Form 4 Insider Report for ASPEN AEROGELS INC (ASPN)

Role
CAO, GC & Corp Secretary
Signature
/s/ Andrew Lauzon, Attorney-in-Fact
Issuer symbol
ASPN
Transactions as of
04 Mar 2026
Net transactions value
$0
Form type
4
Filing time
06 Mar 2026, 17:00:15 UTC
Previous filing
02 Oct 2025
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
DEEGAN GLENN E. CAO, GC & Corp Secretary C/O ASPEN AEROGELS, INC., 30 FORBES ROAD, BLDG B, NORTHBOROUGH /s/ Andrew Lauzon, Attorney-in-Fact 06 Mar 2026 0001254044

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction ASPN Common Stock Award +55,503 +475% $0.000000* 67,176 04 Mar 2026 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 +75,171 $0.000000* 75,171 04 Mar 2026 Common Stock 75,171 $3.35 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 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 Represents 67,176 RSUs.
F3 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