Whitaker Corby C 4

What Happened

• Corby C. Whitaker, Chief Commercial Officer of Aspen Aerogels, had 1,924 shares withheld by the company on March 8, 2026 to satisfy minimum statutory tax withholding on the vesting of restricted stock units (RSUs). The withholding was calculated at $3.22 per share for a total of about $6,195. This is an administrative tax-withholding (code F), not an open-market sale.

Key Details

• Transaction date: 2026-03-08; Form 4 filed: 2026-03-10 (appears timely).
• Price used for withholding: $3.22 per share.
• Shares withheld/disposed: 1,924 shares; cash value ≈ $6,195.
• Shares owned after transaction (per footnote): 128,170 shares of common stock and 77,145 RSUs.
• Footnotes: F1 — shares withheld to satisfy minimum statutory tax withholding on RSU vesting; F2 — summarizes beneficial holdings.
• Filing timeliness: no late filing flag noted.

Context

• This was a routine cashless/tax-withholding action tied to RSU vesting (company withheld shares rather than the insider selling in the open market). Such withholdings are administrative and do not necessarily signal insider buying or selling intent. Purchases or open-market sales typically provide clearer signals about insider sentiment.