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Aspen Aerogels (ASPN) awards director RSUs and stock options

Filing Impact
(Neutral)
Filing Sentiment
(Neutral)
Form Type
4

Rhea-AI Filing Summary

Aspen Aerogels director Steven R. Mitchell received new equity awards as part of his non-employee director compensation. He was granted 10,370 Restricted Stock Units, each representing one share of common stock upon vesting. These RSUs vest on the earlier of May 13, 2027 or the day before the 2027 annual stockholders meeting.

Mitchell was also granted stock options for 8,706 shares of common stock at an exercise price of $5.40 per share, expiring on May 13, 2036. After these awards, he holds 156,898 common shares and RSUs in total, reflecting routine compensation-related acquisitions rather than open-market purchases.

Positive

  • None.

Negative

  • None.
Insider Mitchell Steven R
Role null
Type Security Shares Price Value
Grant/Award Stock Options (Right to Buy) 8,706 $0.00 --
Grant/Award Common Stock 10,370 $0.00 --
Holdings After Transaction: Stock Options (Right to Buy) — 8,706 shares (Direct, null); Common Stock — 156,898 shares (Direct, null)
Footnotes (1)
  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. Represents 146,528 shares of Common Stock and 10,370 RSUs. 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.
RSU grant 10,370 RSUs Annual equity grant for non-employee director; each RSU equals one share upon vesting
Option grant size 8,706 options Stock options granted as remaining portion of annual director equity award
Option exercise price $5.40 per share Exercise price for newly granted stock options
Option expiration May 13, 2036 Expiration date of director’s newly granted stock options
Post-transaction holdings 156,898 shares/RSUs Total Aspen Aerogels common stock and RSUs held after grants
Common shares vs RSUs detail 146,528 shares; 10,370 RSUs Breakdown of post-transaction position from footnote
Restricted Stock Units ("RSUs") financial
"The reporting person was granted Restricted Stock Units ("RSUs") representing a portion of the annual grant of equity"
Restricted stock units (RSUs) are a company promise to give an employee shares of stock (or cash equivalent) in the future, but only after certain conditions—usually staying with the company for a set time or hitting performance goals—are met. Investors watch RSUs because when they vest they increase the number of shares outstanding and can lead insiders to sell shares, affecting share price, company dilution and the true cost of employee pay.
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)"
underlying security financial
"underlying_security_title": "Common Stock""
Form 4 Insider Transactions: What Each Field Means →
SEC Form 4
FORM 4UNITED 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*
Mitchell Steven R
(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)
XDirector10% Owner
Officer (give title below)Other (specify below)
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
05/13/2026		6. Individual or Joint/Group Filing (Check Applicable Line)
XForm 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)
CodeVAmount(A) or (D)Price
Common Stock05/13/2026A10,370(1)A$0156,898(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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Stock Options (Right to Buy)$5.405/13/2026A8,706 (3)05/13/2036Common Stock8,706$08,706D
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. Represents 146,528 shares of Common Stock and 10,370 RSUs.
3. 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.
Remarks:
Exhibit 24.1 - Power of Attorney
/s/ Glenn Deegan, Attorney-in-Fact05/14/2026
** Signature of Reporting PersonDate
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

FAQ

What equity awards did Aspen Aerogels (ASPN) grant to director Steven R. Mitchell?

Aspen Aerogels granted Steven R. Mitchell 10,370 Restricted Stock Units and stock options for 8,706 shares. These awards represent his annual equity compensation for service as a non-employee director under the company’s Non-Employee Director Compensation Policy.

When do Steven R. Mitchell’s new Aspen Aerogels RSUs vest?

The 10,370 Restricted Stock Units vest on the earlier of May 13, 2027, or the day before Aspen Aerogels’ 2027 annual stockholders meeting. Upon vesting, each RSU converts into one share of common stock, increasing his directly held share count.

What are the terms of Steven R. Mitchell’s new Aspen Aerogels stock options?

Mitchell received stock options covering 8,706 shares of Aspen Aerogels common stock at a $5.40 exercise price. These options are part of his annual director equity grant and will vest on the same schedule as the RSUs, expiring on May 13, 2036.

How many Aspen Aerogels shares does Steven R. Mitchell hold after these grants?

Following the grants, Mitchell’s position is 156,898 common shares and RSUs in total. A footnote clarifies this reflects 146,528 shares of common stock plus 10,370 RSUs, all held as direct ownership in Aspen Aerogels.

Is Steven R. Mitchell’s Form 4 transaction in ASPN stock an open-market trade?

No, the Form 4 reports compensation-related grants, not open-market trades. The RSUs and stock options were awarded under Aspen Aerogels’ Non-Employee Director Compensation Policy as part of his annual equity grant for board service.