Aspen Aerogels Inc SEC Filings

Glenn E. Deegan, Chief Administrative Officer, General Counsel and Corporate Secretary of Aspen Aerogels, Inc. (ASPN), reported equity awards granted on 09/30/2025. The filing shows 11,673 RSUs, 16,416 stock options with a $6.96 exercise price and a 09/30/2035 expiration, and 23,347 performance share units (PSUs). The RSUs and options each vest in three equal annual tranches on 09/30/2026, 09/30/2027 and 09/30/2028. The PSUs vest on 03/05/2028 following a performance period from 01/01/2025 to 12/31/2027, and payout ranges from 0% to 200% of target based on total shareholder return relative to the Russell 2000 components. The reported beneficial ownership counts after the transactions are 11,673 RSUs, 16,416 options, and 23,347 PSUs.

Aspen Aerogels reporting person Grant Thoele filed an initial Form 3 disclosing his beneficial ownership in ASPN. He directly holds 4,608 shares of common stock and holds multiple stock option grants exercisable between 11/02/2031 and 03/05/2035 covering a total of several thousand shares at exercise prices from $7.84 to $52.60. He also holds 12,755 performance share units that vest after a performance period ending 12/31/2027 and pay out based on relative total shareholder return versus the Russell 2000.

Glenn E. Deegan, serving as CAO, General Counsel and Corporate Secretary of Aspen Aerogels, Inc. (ASPN), filed an initial Form 3 dated 09/22/2025 reporting that he does not beneficially own any securities of the issuer. The filing identifies Deegan's address at 30 Forbes Road, Northborough, MA, and was executed on his behalf by Andrew Lauzon, Attorney-in-Fact.

Insider transaction summary for ASPN: Daniel Santhosh, Chief Accounting Officer of Aspen Aerogels, reported the disposition of 1,563 shares of common stock on 09/13/2025 at a price of $6.59 per share. The filing states these shares were withheld by the company to satisfy minimum statutory tax withholding on vesting of restricted stock units (RSUs). After the withholding, Mr. Santhosh beneficially owns a total of 16,316 shares/RSU-equivalents, composed of 3,761 shares of common stock and 12,555 RSUs. The Form 4 was signed by an attorney-in-fact on 09/15/2025.

Aspen Aerogels, Inc. (ASPN) disclosed executive severance terms for Mr. Thoele in an 8-K. If his employment ends without cause or for good reason (a Qualifying Termination) and not tied to a change of control, he would receive 1x his annual base salary plus his Performance Bonus Target, a pro rata bonus for the year, any prior unpaid bonus, health-care cost coverage for up to 12 months or the applicable COBRA period, six months of outplacement, and accelerated vesting of awards that would have vested within 12 months, with vested options exercisable for one year post-termination (subject to original expiration dates).

If a Qualifying Termination occurs within 24 months after a change of control, the cash multiple rises to 2x salary plus Performance Bonus Target, health coverage extends up to 24 months, outplacement remains six months, and all outstanding equity awards accelerate in full, with vested options exercisable for one year (subject to original expiration dates).

Stephanie Pittman, Chief Human Resources Officer of Aspen Aerogels, Inc. (ASPN), reported a Form 4 filing disclosing a transaction on 09/05/2025. The filing shows 1,581 shares of Common Stock were disposed of at a price of $6.61 per share. Following the transaction, Ms. Pittman beneficially owns 42,257 shares in total, comprised of 9,196 shares of Common Stock and 33,061 unvested Restricted Stock Units (RSUs). The filing states the 1,581 shares were withheld by the company to satisfy minimum statutory tax withholding on RSU vesting.

Daniel Santhosh P, the Chief Accounting Officer of Aspen Aerogels, filed a Form 4 reporting the sale of company common stock in two transactions on 08/12/2025 and 08/13/2025. On 08/12/2025 he sold 4,410 shares in multiple trades at prices ranging about $7.31–$7.32, and the report shows 19,879 shares beneficially owned following that transaction. On 08/13/2025 he sold 2,000 shares at $7.54, with 17,879 listed as beneficially owned following that sale.

The filing notes that the 17,879 shares represent Restricted Stock Units. No derivative securities are reported. A Power of Attorney is attached as Exhibit 24 and the form is signed by an attorney-in-fact, Stephanie Pittman, on 08/13/2025. The report is limited to the disclosed share counts, transaction dates, and prices in the form.

Aspen Aerogels, Inc. (ASPN) has filed a Form 144 reporting a proposed sale of 4,410 common shares through Morgan Stanley Smith Barney LLC on the New York Stock Exchange with an aggregate market value of $32,251.65 and an approximate sale date of 08/12/2025. The filing identifies the shares as common stock and lists total shares outstanding as 82,360,491, indicating the sale is a small, specific disposition of restricted shares previously acquired.

The securities to be sold were acquired as restricted stock on two dates: 3/5/2025 (796 shares) and 9/13/2024 (3,614 shares). The filer reports no sales of the issuer's securities in the past three months. The notice includes the standard insider representation regarding absence of undisclosed material adverse information.