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Aspen Aerogels Inc. (ASPN)

Aspen Aerogels Inc. (ASPN) Insider Trading

Directors, officers and holders of more than 10% of ASPN report their trades in its stock on SEC Form 4, within two business days. Each row below is one Form 4 transaction line. The one-letter code says what kind of transaction it was: only P (purchase) and S (sale) are open-market or private trades; awards, option exercises, tax withholding and gifts carry other codes.

Recent Form 4 transactions

The 50 most recent of 104 transactions on file: 1 with code P, 4 with code S and 45 with other codes.

DateInsiderCodeShares
Sep 30, 2026DEEGAN GLENN E.F Tax Payment1,143
Sep 23, 2026Wood River Capital, LLCS Sale12,280,426
Jun 23, 2026NOGLOWS WILLIAM PM Exercise14,799
Jun 23, 2026NOGLOWS WILLIAM PM Exercise14,799
May 13, 2026NOGLOWS WILLIAM PA Award10,370
May 13, 2026Robinson CariA Award8,706
May 13, 2026SWEETNAM JAMES EA Award10,370
May 13, 2026Robinson CariA Award10,370
May 13, 2026NOGLOWS WILLIAM PA Award8,706
May 13, 2026Mitchell Steven RA Award8,706
May 13, 2026Kool KathleenA Award10,370
May 13, 2026Mitchell Steven RA Award10,370
May 13, 2026Kool KathleenA Award8,706
May 13, 2026SWEETNAM JAMES EA Award8,706
Mar 8, 2026Young Donald RF Tax Payment4,275
Mar 8, 2026Whitaker Corby CF Tax Payment1,924
Mar 8, 2026Landes GreggF Tax Payment1,924
Mar 8, 2026Thoele Grant DouglasF Tax Payment590
Mar 5, 2026Daniel Santhosh PF Tax Payment986
Mar 5, 2026Whitaker Corby CF Tax Payment3,907
Mar 5, 2026Young Donald RF Tax Payment8,618
Mar 5, 2026Thoele Grant DouglasF Tax Payment2,368
Mar 5, 2026Landes GreggF Tax Payment3,814
Mar 4, 2026Young Donald RA Award212,249
Mar 4, 2026Landes GreggA Award77,824
Mar 4, 2026Whitaker Corby CA Award57,462
Mar 4, 2026Whitaker Corby CA Award77,824
Mar 4, 2026DEEGAN GLENN E.A Award75,171
Mar 4, 2026Landes GreggA Award57,462
Mar 4, 2026Young Donald RA Award156,716
Mar 4, 2026DEEGAN GLENN E.A Award55,503
Mar 4, 2026Thoele Grant DouglasA Award55,298
Mar 4, 2026Thoele Grant DouglasA Award74,893
Nov 13, 2025Young Donald RS Sale56,845
Oct 1, 2025Thoele Grant DouglasA Award14,563
Oct 1, 2025Thoele Grant DouglasA Award20,547
Oct 1, 2025Thoele Grant DouglasA Award10,273
Sep 30, 2025DEEGAN GLENN E.A Award16,416
Sep 30, 2025DEEGAN GLENN E.A Award23,347
Sep 30, 2025DEEGAN GLENN E.A Award11,673
Sep 13, 2025Daniel Santhosh PF Tax Payment1,563
Sep 5, 2025Pittman StephanieF Tax Payment1,581
Aug 13, 2025Daniel Santhosh PS Sale2,000
Aug 12, 2025Daniel Santhosh PS Sale4,410
May 23, 2025Johnson VirginiaF Tax Payment6,129
May 12, 2025Young Donald RP Purchase20,000
Apr 30, 2025SWEETNAM JAMES EA Award9,105
Apr 30, 2025Robinson CariA Award9,105
Apr 30, 2025Mitchell Steven RA Award9,105
Apr 30, 2025Kool KathleenA Award9,105

The full Form 4 history is on the ASPN company page (Insider Trades card, View all).

Questions about this data

Which insider transactions are open-market trades?

Code P (open market or private purchase) and code S (open market or private sale). Code F is shares withheld to pay tax on vesting stock, A is an award from the company, M and X are option exercises and G is a gift. None of those is the insider choosing to buy or sell in the market.

How quickly are insider trades reported?

A Form 4 is due before the end of the second business day after the trade. The date shown is the transaction date from the form.

Who has to file Form 4?

Officers, directors and beneficial owners of more than 10% of a class of the company’s registered equity, under Section 16 of the Securities Exchange Act.

Look up any code in the Form 4 transaction code reference, or read Form 4 codes explained.