[8-K] ASPEN AEROGELS INC Reports Material Event

Rhea-AI Filing Summary

Aspen Aerogels, Inc. (ASPN) furnished an update on its business by announcing financial results for the third quarter of 2025, for the period ended September 30, 2025. The company attached a detailed press release as Exhibit 99.1.

Information about results is furnished under Item 2.02, while “2025 Financial Outlook” and company background are furnished under Item 7.01. The materials are being furnished, not filed, under the Exchange Act.

False000114598600011459862025-11-062025-11-06iso4217:USDxbrli:sharesiso4217:USDxbrli:shares

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

_________________

FORM 8-K

_________________

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported):  November 6, 2025

_______________________________

ASPEN AEROGELS, INC.

(Exact name of registrant as specified in its charter)

_______________________________

Delaware	001-36481	04-3559972
(State or Other Jurisdiction of Incorporation)	(Commission File Number)	(I.R.S. Employer Identification No.)

30 Forbes Road, Building B Northborough, Massachusetts	01532
(Address of Principal Executive Offices)	(Zip Code)

Registrant's Telephone Number, Including Area Code: (508) 691-1111

(Former name or former address, if changed since last report)

_______________________________

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐	Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
☐	Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)
☐	Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))
☐	Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Common Stock	ASPN	The New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02. Results of Operations and Financial Condition.

On November 6, 2025, Aspen Aerogels, Inc. announced its financial results for the third quarter of 2025, which ended September 30, 2025, and also discussed business developments. A copy of the press release containing such announcement is attached hereto as Exhibit 99.1.

The information set forth in the press release, except for the information set forth under the headings “2025 Financial Outlook” and “About Aspen Aerogels, Inc.,” together with the forward-looking statement disclaimer at the end of the press release, is incorporated by reference into this Item 2.02 of this Current Report on Form 8-K.

Item 7.01. Regulation FD Disclosure.

The information set forth under the headings “2025 Financial Outlook” and “About Aspen Aerogels, Inc.,” together with the forward-looking statement disclaimer at the end of the press release, is incorporated by reference into this Item 7.01 of this Current Report on Form 8-K.

Item 9.01. Financial Statements and Exhibits.

(d) Exhibits.

Exhibit Number		Description
99.1		Press Release issued by Aspen Aerogels, Inc. on November 6, 2025
104		Cover Page Interactive Data File (embedded within the Inline XBRL document)

The press release may contain hypertext links to information on our website. The information on our website is not incorporated by reference into this Current Report on Form 8-K and does not constitute a part of this Form 8-K.

The information contained in this Current Report on Form 8-K and Exhibit 99.1 attached hereto is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities under that Section, nor shall it be deemed incorporated by reference into any registration statement or other filing under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in such filing.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

	ASPEN AEROGELS, INC.
Date: November 6, 2025	By:	/s/ Grant Thoele
	Name:	Grant Thoele
	Title:	Chief Financial Officer and Treasurer

FAQ

What did Aspen Aerogels (ASPN) announce in this 8-K?

It announced financial results for the third quarter of 2025 and furnished a detailed press release as Exhibit 99.1.

What period do the results cover for ASPN?

The results cover the third quarter of 2025, for the period ended September 30, 2025.

Where can investors find the detailed ASPN results?

In the press release attached as Exhibit 99.1 to the 8-K.

Which 8-K items does ASPN use for this disclosure?

Results are furnished under Item 2.02; “2025 Financial Outlook” and company information are furnished under Item 7.01.

Is ASPN’s information considered filed or furnished?

The information in the 8-K and Exhibit 99.1 is being furnished, not filed, under the Exchange Act.

Does the 8-K include a financial outlook for ASPN?

Yes. The “2025 Financial Outlook” section of the press release is incorporated under Item 7.01.