Equity awards for Aspen Aerogels (ASPN) CAO Glenn Deegan

Rhea-AI Filing Summary

DEEGAN GLENN E. reported acquisition or exercise transactions in this Form 4 filing.

Aspen Aerogels chief accounting officer and general counsel Glenn E. Deegan received new equity awards. On March 4, 2026, he was granted 75,171 stock options and 55,503 restricted stock units (RSUs) at no cash cost.

Each RSU represents one share of common stock when it vests. Both the RSUs and options vest in three equal installments on March 4, 2027, March 4, 2028 and March 4, 2029, aligning compensation with longer-term company performance.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

DEEGAN GLENN E.

(Last) (First) (Middle)

C/O ASPEN AEROGELS, INC.

30 FORBES ROAD, BLDG B

(Street)

NORTHBOROUGH MA 01532

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
ASPEN AEROGELS INC [ ASPN ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	CAO, GC & Corp Secretary

3. Date of Earliest Transaction (Month/Day/Year)
03/04/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	03/04/2026		A		55,503(1)	A	$0	67,176(2)	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Stock Options (Right to Buy)	$3.35	03/04/2026		A		75,171		(3)	03/04/2036	Common Stock	75,171	$0	75,171	D

Explanation of Responses:

1. 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.

2. Represents 67,176 RSUs.

3. 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

	/s/ Andrew Lauzon, Attorney-in-Fact	03/06/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What did Aspen Aerogels (ASPN) disclose in Glenn Deegan’s latest Form 4?

Aspen Aerogels reported that executive Glenn E. Deegan received equity awards on March 4, 2026. He was granted 75,171 stock options and 55,503 restricted stock units, both vesting over three years, linking his compensation more closely to the company’s future performance.

Who is Glenn E. Deegan at Aspen Aerogels (ASPN)?

Glenn E. Deegan serves as Aspen Aerogels’ Chief Accounting Officer, General Counsel, and Corporate Secretary. The Form 4 shows he received new stock options and restricted stock units, reflecting his role as a key member of the company’s senior leadership team.

How many stock options did Glenn Deegan acquire from Aspen Aerogels?

Glenn Deegan was granted 75,171 stock options in Aspen Aerogels on March 4, 2026. These options were awarded at no cash exercise price initially and vest in three equal installments between March 2027 and March 2029, encouraging longer-term alignment with shareholder interests.

What are the terms of the restricted stock units granted to Glenn Deegan at ASPN?

Deegan received 55,503 restricted stock units (RSUs), each representing one Aspen Aerogels common share upon vesting. The RSUs vest one-third on March 4, 2027, another third on March 4, 2028, and the final third on March 4, 2029, creating a multi‑year incentive.

How do Glenn Deegan’s Aspen Aerogels RSUs vest over time?

His Aspen Aerogels RSUs vest in three equal tranches. One-third vests on March 4, 2027, another third on March 4, 2028, and the remaining third on March 4, 2029, gradually delivering common shares as long as vesting conditions are satisfied.

Do Glenn Deegan’s new Aspen Aerogels equity awards involve any immediate cash transaction?

No cash purchase is shown for these awards. The Form 4 lists both the stock options and the restricted stock units with a price per share of $0.0000, indicating they were granted as compensation rather than acquired through an open‑market cash transaction.