As of November 6, 2026, Aspen Aerogels Inc. is a publicly traded company (NYSE: ASPN); its largest reported holder is Orin Hirschman, with 8.6% on Schedule 13G of October 19, 2026. The largest insider holding is Donald R. Young, the chief executive and president, with 637,834 shares (0.77% of shares outstanding), per Form 4 of March 10, 2026 (Schedule 13G, October 19, 2026).
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Is Aspen Aerogels Inc. a real, registered company?
- Aspen Aerogels, Inc. files with the SEC under CIK 1145986 (its SEC filings).
- Its shares are listed under the ticker ASPN on NYSE (SEC company record).
- Incorporated in Delaware; business address in Northborough, Massachusetts, as its SEC filings state.
- Court and bankruptcy records: see Before you sign or pay below.
Before you sign or pay
- Court and bankruptcy: No federal court case or bankruptcy filing found under ASPEN AEROGELS, INC. in our court records and SEC 8-K records (as of 2026-11-06).
- Leadership changes: the latest reported is Stacy D. Nieuwoudt, Director (Form 8-K filed 2026-11-05). Check you are dealing with the people now in charge.
- Ownership: 5%+ holders are reported on Schedule 13D or 13G; the latest names Orin Hirschman (filed 2026-10-19).
Who are Aspen Aerogels Inc.'s owners and officers?
Aspen Aerogels Inc.: incorporated in Delaware; business address in Northborough, Massachusetts; industry Wholesale-Lumber & Other Construction Materials (Form D, 2026-11-05).
| Report | Holder | Share |
|---|---|---|
| Schedule 13G, 2026-10-19 | Orin Hirschman | 8.6% |
| Schedule 13D/A, 2026-09-24 | Wood River Capital, LLC | 0% |
| Schedule 13G/A, 2026-08-13 | Needham Investment Management L.L.C. | 3.9% |
| Schedule 13G/A, 2026-03-26 | The Vanguard Group | 0% |
| Schedule 13G, 2026-02-13 | Needham Investment Management L.L.C. | 5.3% |
Questions about who owns Aspen Aerogels Inc.
Who owns Aspen Aerogels Inc.?
On this page, one holder's latest ownership filing reports 5% or more of Aspen Aerogels Inc.: Orin Hirschman (8.6%, Schedule 13G, filed 2026-10-19).
When did Orin Hirschman buy into Aspen Aerogels Inc.?
The filings give report dates, not purchase dates. The earliest filing from Orin Hirschman on this page is the Schedule 13G, filed 2026-10-19, reporting 8.6%.
Is this an audit or a full list?
Neither. The ownership list on this page covers only Schedule 13D and 13G filings, which holders make once they own 5% or more of a class of shares (an amendment can report a stake that has since fallen below 5%); 5 such filings are shown here. It is not an audit and not a full cap table: holders who never reached 5% are not listed, and a stake can change after its latest filing.
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| Filed | Person | Role | Change | Effective |
|---|---|---|---|---|
| Form 8-K, 2026-11-05 | Stacy D. Nieuwoudt | Director | appointed | 2026-11-04 |
| Form 8-K, 2026-05-18 | Grant Thoele | Chief Financial Officer | appointed |
Which insiders own Aspen Aerogels Inc. shares?
Directors, officers and holders of 10% or more report their shares on Forms 3, 4 and 5. Each line is the latest such report, largest holding first.
- , the chief executive and president: 637,834 shares (0.77% of shares outstanding) (Form 4, 2026-03-10).
- , the chief commercial officer: 205,315 shares (0.25% of shares outstanding) (Form 4, 2026-03-10).
- , a director: 156,898 shares (0.19% of shares outstanding) (Form 4, 2026-05-14).
- , a director: 134,156 shares (0.16% of shares outstanding), 114,156 held directly and 20,000 indirectly (Form 4, 2026-06-26).
- , the chief operating officer: 102,931 shares (0.12% of shares outstanding) (Form 4, 2026-03-10).
Shares outstanding: 83,128,438 as of 2026-11-03, from the company's latest SEC cover page.
How much has Aspen Aerogels Inc. raised?
No fundraising or offering filing from Aspen Aerogels Inc. is on file with us.
Keep reading
More on Aspen Aerogels Inc. and the records around it.
Aspen Aerogels Inc. elsewhere on the record
- 5%+ stake filings Oct 2026
Companies that share a holder
- Needham Investment Management L.L.C. also filed stake reports on 13 other companies: Elmet Group Co. (Aug 2026), LANTRONIX INC (Jul 2026), Precision Optics Corporation, Inc. (May 2026)
- Orin Hirschman also filed stake reports on 46 other companies: Bionano Genomics, Inc. (Oct 2026), FENNEC PHARMACEUTICALS INC. (Oct 2026), DOMO, INC. (Oct 2026)
- The Vanguard Group also filed stake reports on 2384 other companies: BellRing Brands, Inc. (Sep 2026), CAL-MAINE FOODS INC (Sep 2026), FTAI Aviation Ltd. (Sep 2026)
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