Stacy Durbin Nieuwoudt filed an initial statement of beneficial ownership with the SEC on November 6, 2026, disclosing her status as a newly appointed director of Aspen Aerogels, Inc. with no securities beneficially owned.

Key Highlights

  • Reporting person: Stacy Durbin Nieuwoudt, identified as a Director of Aspen Aerogels, Inc. (NYSE:ASPN).
  • Event date: The date of the event requiring the statement was November 4, 2026.
  • No securities owned: Both Table I (non-derivative securities) and Table II (derivative securities) are blank; the filing states "No securities are beneficially owned."
  • Filing type: This is an initial statement, not an amendment, filed by one reporting person.
  • Signed by attorney-in-fact: The form was signed by Glenn Deegan as Attorney-in-Fact on November 6, 2026, pursuant to an attached Power of Attorney (Exhibit 24.1).

Nieuwoudt's Initial Ownership Disclosure as Aspen Aerogels Director

According to the filing, Stacy Durbin Nieuwoudt submitted a Form 3 Initial Statement of Beneficial Ownership of Securities in connection with becoming a Director of Aspen Aerogels, Inc., listed on the New York Stock Exchange under the ticker ASPN. The event requiring the statement occurred on November 4, 2026, and the form was filed two days later on November 6, 2026.

The filing reports no beneficial ownership of any securities, either direct or indirect. Table I, covering non-derivative securities, and Table II, covering derivative securities such as puts, calls, warrants, options, and convertible securities, are both empty. The filing explicitly notes: "No securities are beneficially owned." This disclosure reflects Nieuwoudt's ownership position at the time of her becoming subject to Section 16(a) reporting requirements as a director.

The form was not filed as an amendment to any prior submission. It was filed by one reporting person. Glenn Deegan signed the document as Attorney-in-Fact on behalf of Nieuwoudt, referencing a Power of Attorney included as Exhibit 24.1. Nieuwoudt's listed address is care of Aspen Aerogels, Inc., 30 Forbes Road, Building B, Northborough, Massachusetts 01532.

What Was Disclosed

Stacy Durbin Nieuwoudt filed an initial beneficial ownership statement upon becoming a director of Aspen Aerogels, Inc., reporting no direct or indirect ownership of any non-derivative or derivative securities of the company as of November 4, 2026.