Results of Operations and Financial Condition. On August 6, 2026, Aspen Aerogels, Inc. announced its financial results for the second quarter of 2026, which ended June 30, 2026, 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 “Financial Outlook” and “About Aspen Aerogels, Inc.,” together with the forward-…

Chief Financial Officer, Treasurer, principal financial officer, and now also principal accounting officer — Grant Thoele: Grant Thoele was given additional responsibilities as principal accounting officer.

Results of Operations and Financial Condition. On May 7, 2026, Aspen Aerogels, Inc. announced its financial results for the first quarter of 2026, which ended March 31, 2026, 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 “Financial Outlook” and “About Aspen Aerogels, Inc.,” together with the forward-loo…

Results of Operations and Financial Condition. On February 25, 2026, Aspen Aerogels, Inc. announced its financial results for the fourth quarter and fiscal year 2025, which ended December 31, 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 “Financial Outlook” and “About Aspen Aerogels, Inc.,” togeth…

Entry into a Material Definitive Agreement. On December 16, 2025, Aspen Aerogels, Inc., a Delaware corporation (the “ Company ”), Aspen Aerogels Rhode Island, LLC, a Rhode Island limited liability company (“ Aspen RI ”), Aspen Aerogels Mexico Holdings, LLC, a Delaware limited liability company (“ Aspen Mexico ”) and Aspen Aerogels Georgia, LLC, a Georgia limited liability company (“ Aspen Georgia ” and, together with the Company, Aspen RI and Aspen Mexico, collectively, the “ Credit Parties ”…

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 t…

Chief Financial Officer and Treasurer — Grant Thoele: Grant Thoele was promoted to Chief Financial Officer and Treasurer with a new employment agreement, compensation package, and equity grant.

Results of Operations and Financial Condition. On August 7, 2025, Aspen Aerogels, Inc. announced its financial results for the second quarter of 2025, which ended June 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 “Second Half of 2025 Financial Outlook,” “Aspen Announces CFO Transition to Inte…

Results of Operations and Financial Condition. On May 8, 2025, Aspen Aerogels, Inc. announced its financial results for the first quarter of 2025, which ended March 31, 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 heading “Q2 2025 Financial Outlook” and under the heading “About Aspen Aerogels, Inc.,” toge…

The filing is about the approval of equity incentive and stock purchase plans, not a management change.

The company granted performance share unit awards to its named executive officers as part of the regular annual grant cycle.

Director — Rebecca B. Blalock and Mark L. Noetzel: Directors are retiring as part of the regular Board refreshment process.

Results of Operations and Financial Condition. On February 12, 2025, Aspen Aerogels, Inc. announced its financial results for the fourth quarter and fiscal year 2024, which ended December 31, 2024, 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 heading “Q1 2025 Financial Outlook” and under the heading “About Aspe…

Results of Operations and Financial Condition. On November 6, 2024, Aspen Aerogels, Inc. announced its financial results for the third quarter of 2024, which ended September 30, 2024, 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 heading “2024 Financial Outlook” and under the heading “About Aspen Aerogels, Inc.,…

Entry into a Material Definitive Agreement. On October 21, 2024, Aspen Aerogels, Inc. (the “Company”) entered into an underwriting agreement (the “Underwriting Agreement”) with Goldman Sachs & Co. LLC and Morgan Stanley & Co. LLC (collectively, the “Underwriters”), pursuant to which the Company agreed to issue and sell an aggregate of 4,250,000 shares of the Company’s common stock, $0.00001 par value per share, to the Underwriters (the “Offering”). The price to the public in the Offering was…

Results of Operations and Financial Condition. On October 16, 2024, Aspen Aerogels, Inc. (the “Company”) issued a press release containing certain preliminary financial information for the third quarter ended September 30, 2024. A copy of the press release containing such announcement is attached hereto as Exhibit 99.1. The information in the press release under the headings “Q3 2024 Preliminary Financial Results,” “Non-GAAP Financial Measures” and “Reconciliation of Non-GAAP Financial Measur…

President and Chief Executive Officer — Donald R. Young: Mr. Young's employment agreement was amended and restated, extending his term and maintaining his current compensation.

Entry into a Material Definitive Agreement. Note Purchase and Sale Agreement On August 19, 2024, Aspen Aerogels, Inc. (the “ Company ”) entered into a note purchase and sale agreement (the “ Note Repurchase Agreement ”) with Wood River Capital, LLC (“ Wood River ”), an entity affiliated with Koch Disruptive Technologies, LLC, pursuant to which the Company agreed to repurchase from Wood River $123,937,608 in aggregate capitalized principal amount (inclusive of PIK interest paid through June 30…

Termination of a Material Definitive Agreement GM Loan Agreement Termination On August 16, 2024 and as a condition to entry into the MidCap Loan Facility, the Company and General Motors Holdings LLC (“ GM ”) entered into a termination letter (the “ Termination Letter ”) to terminate and payoff in full all obligations outstanding under that certain Loan Agreement, dated as of November 28, 2022 (as amended by that certain First Amendment to Loan Agreement, dated as of September 28, 2023, the “…

Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement or the Registrant The information related to the Note Repurchase and the MidCap Loan Facility in

Results of Operations and Financial Condition. On August 7, 2024, Aspen Aerogels, Inc. announced its financial results for the second quarter of 2024, which ended June 30, 2024, 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 heading “2024 Financial Outlook” and under the heading “About Aspen Aerogels, Inc.,” toge…

Results of Operations and Financial Condition. On May 1, 2024, Aspen Aerogels, Inc. announced its financial results for the first quarter of 2024, which ended March 31, 2024, 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 heading “2024 Financial Outlook” and under the heading “About Aspen Aerogels, Inc.,” togethe…

The company cancelled unearned performance-based restricted shares due to remote likelihood of achieving performance hurdles.

Results of Operations and Financial Condition. On February 12, 2024, Aspen Aerogels, Inc. announced its financial results for the fourth quarter and fiscal year 2023, which ended December 31, 2023, 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 heading “2024 Financial Outlook” and under the heading “About Aspen A…

Results of Operations and Financial Condition. On January 11, 2024, Aspen Aerogels, Inc. issued a press release containing recent developments with its business, preliminary financial information for full year and fourth quarter 2023, and a preliminary 2024 financial outlook. 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 heading “Current 2024 Baseline R…