Young Donald R 4

4 · ASPEN AEROGELS INC · Filed Mar 6, 2026

AI-generated summary of this filing

Updated Mar 6, 2026

Aspen Aerogels (ASPN) CEO Donald Young Receives Stock Awards

What Happened

Donald R. Young, President, CEO and Director of Aspen Aerogels (ASPN), received equity awards on March 4, 2026: 156,716 Restricted Stock Units (RSUs) and 212,249 derivative awards (options/other equity derivative). Both grants show acquisition price $0.00.
On March 5, 2026, 8,618 shares were disposed (withheld) to satisfy tax withholding obligations at $3.27 per share, totaling $28,181. The grants themselves are awards (not purchases or open-market sales).

Key Details

Transaction dates/prices:
- 2026-03-04: Grant of 156,716 RSUs (A) @ $0.00.
- 2026-03-04: Grant of 212,249 derivative awards (A, derivative) @ $0.00.
- 2026-03-05: 8,618 shares withheld/disposed (F) to cover taxes @ $3.27, proceeds $28,181.
Shares/holdings after transaction (per filing footnote): 430,387 shares of Common Stock and 211,722 RSUs.
Footnotes of note:
- F1: RSUs vest one-third on each of March 4, 2027, 2028 and 2029.
- F2: Shares were withheld by the company to satisfy minimum statutory tax withholding on RSU vesting.
- F4: Options (derivative awards) vest one-third on each of March 4, 2027, 2028 and 2029.
Filing timeliness: Report filed March 6, 2026, covering transactions of March 4–5, 2026 (filed timely per Form 4 rules).

Context

The 156,716-item award are RSUs (convert to common shares upon vesting); the 212,249 derivative award appears to be option-type awards with multi-year vesting. Neither award involved an open-market purchase or sale of newly acquired shares at grant.
The 8,618-share disposition was a tax-withholding action (routine cashless withholding) to satisfy tax obligations and does not necessarily reflect a market sell decision by the insider.
These awards increase the CEO’s future potential stake as they vest; vesting schedules mean the economic interest is realized over 2027–2029.

Form 4

Period: 2026-03-04

DirectorPresident and CEO

Transactions

Award
Common Stock
[F1]
2026-03-04+156,716→ 650,727 total
Tax Payment
Common Stock
[F2][F3]
2026-03-05$3.27/sh−8,618$28,181→ 642,109 total
Award
Stock Options (Right to Buy)
[F4]
2026-03-04+212,249→ 212,249 total
Exercise: $3.35Exp: 2036-03-04→ Common Stock (212,249 underlying)

Footnotes (4)

[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]Shares withheld by Registrant to satisfy the minimum statutory tax withholding requirements on vesting of Restricted Stock Units ("RSUs").
[F3]Represents 430,387 shares of Common Stock and 211,722 RSUs.
[F4]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.

Signature

/s/ Glenn Deegan, Attorney-in-Fact|2026-03-06

1 file