Aspen Aerogels director gets 6,073 stock units

Q: How many ASPN RSUs and options did Stacy Durbin Nieuwoudt receive?

On November 4, 2026, Stacy Durbin Nieuwoudt received 6,073 RSUs and options to buy 5,100 common shares. Each RSU represents the right to receive one share of Common Stock upon vesting.

Q: When do Stacy Durbin Nieuwoudt's ASPN options expire?

The options expire on November 4, 2036.

The director's options carry a $4.80 exercise price and expire on November 4, 2036.

Available on EDGAR 11/06/2026 - 04:31 PM EST Accepted by SEC EDGAR 11/06/2026 - 04:30 PM EST

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Form Type

Rhea-AI Filing Summary

Stacy Durbin Nieuwoudt, a director of Aspen Aerogels Inc. (ASPN), was granted 6,073 restricted stock units (RSUs) and options to buy 5,100 common shares on November 4, 2026. Each RSU represents the right to receive one share of Common Stock upon vesting. The RSUs and options vest on the earlier of May 13, 2027, or the day prior to the issuer’s annual meeting to be held in 2027.

Insider Trade Summary

Grant/Award: 11,173 shares

Grant/Award 2 txns

Insider Nieuwoudt Stacy Durbin

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Stock Options (Right to Buy) ^F2	5,100	$0.00	$0.00
Grant/Award	Common Stock ^F1	6,073	$0.00	$0.00

Holdings After Transaction: Stock Options (Right to Buy) — 5,100 contracts (Direct); Common Stock — 6,073 shares (Direct)

Footnotes (2)

F1. The reporting person was granted Restricted Stock Units ("RSUs") representing a portion of the annual grant of equity for service as a non-employee director pursuant to the Issuer's Non-Employee Director Compensation Policy. Each RSU represents the right to receive one share of Common Stock upon vesting. These RSUs will vest on the earlier of (a) May 13, 2027, or (b) the day prior to the Issuer's annual meeting of stockholders to be held in 2027.
F2. The reporting person was granted options representing the remaining portion of the annual grant of equity for service as a non-employee director pursuant to the Issuer's Non-Employee Director Compensation Policy. The options will vest on the earlier of (a) May 13, 2027, or (b) the day prior to the Issuer's annual meeting of stockholders to be held in 2027.

Key Figures

RSUs granted: 6,073 RSUs RSUs following grant: 6,073 RSUs Options granted: 5,100 options +4 more

7 metrics

RSUs granted 6,073 RSUs Granted November 4, 2026

RSUs following grant 6,073 RSUs Position following the November 4, 2026 grant

Options granted 5,100 options Granted November 4, 2026

Options following grant 5,100 options Position following the November 4, 2026 grant

Exercise price $4.80 per share Options to buy Common Stock

Option expiration November 4, 2036 Options granted November 4, 2026

Vesting date Earlier of May 13, 2027, or the day prior to the issuer’s 2027 annual meeting Applies to the RSUs and options

Key Terms

Restricted Stock Units, Non-Employee Director Compensation Policy, Stock Options (Right to Buy)

3 terms

Restricted Stock Units financial

"granted Restricted Stock Units ("RSUs") representing a portion"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

Non-Employee Director Compensation Policy financial

"pursuant to the Issuer's Non-Employee Director Compensation Policy"

Stock Options (Right to Buy) financial

"Stock Options (Right to Buy)"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

How many ASPN RSUs and options did Stacy Durbin Nieuwoudt receive?

On November 4, 2026, Stacy Durbin Nieuwoudt received 6,073 RSUs and options to buy 5,100 common shares. Each RSU represents the right to receive one share of Common Stock upon vesting.

When do Stacy Durbin Nieuwoudt's ASPN options expire?

The options expire on November 4, 2036.

AI-generated analysis. How Rhea-AI works. Not financial advice.

Form 4 Insider Transactions: What Each Field Means →

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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

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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^*

Nieuwoudt Stacy Durbin

(Last)

(First)

(Middle)

C/O ASPEN AEROGELS, INC.

30 FORBES ROAD, BLDG B

(Street)

NORTHBOROUGH

MASSACHUSETTS

01532

(City)

(State)

(Zip)

UNITED STATES

(Country)

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

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

X	Director	10% Owner
	Officer (give title below)	Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
11/04/2026

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

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

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

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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	11/04/2026		A		6,073⁽¹⁾	A	$0.00	6,073	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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
Stock Options (Right to Buy)	$4.8	11/04/2026		A		5,100		⁽²⁾	11/04/2036	Common Stock	5,100	$0.00	5,100	D

Explanation of Responses:

1. The reporting person was granted Restricted Stock Units ("RSUs") representing a portion of the annual grant of equity for service as a non-employee director pursuant to the Issuer's Non-Employee Director Compensation Policy. Each RSU represents the right to receive one share of Common Stock upon vesting. These RSUs will vest on the earlier of (a) May 13, 2027, or (b) the day prior to the Issuer's annual meeting of stockholders to be held in 2027.

2. The reporting person was granted options representing the remaining portion of the annual grant of equity for service as a non-employee director pursuant to the Issuer's Non-Employee Director Compensation Policy. The options will vest on the earlier of (a) May 13, 2027, or (b) the day prior to the Issuer's annual meeting of stockholders to be held in 2027.

	/s/ Glenn Deegan, Attorney-in-Fact	11/06/2026
	** 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.
* Form 4: SEC 1474 (03-26)

Source: View Original Filing on SEC EDGAR