Results of Operations and Financial Condition On August 5, 2026, Hudson Technologies, Inc. (the “Company”) issued a press release announcing its financial results for the second quarter and six months ended June 30, 2026. A copy of the press release is furnished herewith as Exhibit 99.1.

Entry into a Material Definitive Agreement See

Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant Revolving Credit Facility Amendment On May 19, 2026, Hudson Technologies Company (“HTC”) and Hudson Holdings, Inc. (“Holdings”), as borrowers (collectively, the “Borrowers”), and Hudson Technologies, Inc. (the “Company”) as a guarantor, entered into a Fifth Amendment to Amended and Restated Credit Agreement dated May 19, 2026 (the “Fifth Amendment”) with Wells Fargo Bank, National…

Results of Operations and Financial Condition On May 6, 2026, Hudson Technologies, Inc. (the “Company”) issued a press release announcing its financial results for the first quarter ended March 31, 2026. A copy of the press release is furnished herewith as Exhibit 99.1.

Director — Alan Sheriff and Jeffrey R. Feeler: Election of new directors to the Board.

Senior Vice President – Sales & Marketing, Director — Kathleen L. Houghton: Ms. Houghton resigned from her positions without a named successor.

Results of Operations and Financial Condition On March 4, 2026, Hudson Technologies, Inc. (the “Company”) issued a press release announcing its financial results for the fourth quarter and fiscal year ended December 31, 2025. A copy of the press release is furnished herewith as Exhibit 99.1.

Senior Vice President - Operations — Robert A. Stoody: Robert A. Stoody was promoted to Senior Vice President - Operations within the company.

Other Events. On December 17, 2025, Hudson Technologies, Inc. (the “Company”) issued a press release announcing the acquisition of the business assets of Denver Refrigerants, Inc. (d/b/a Refrigerants Inc.. A copy of the press release is filed herewith as Exhibit 99.1.

Director — Brian F. Coleman: Mr. Coleman resigned from his position as a member of the Board of Directors without a stated successor.

Regulation FD Disclosure On December 1, 2025, the Company issued a press release announcing that the Company’s Board of Directors has approved an increase to its previously disclosed share repurchase program pursuant to which the Company may now purchase up to an additional $30 million in shares of the Company’s common stock (by increasing the $10 million limit in calendar year 2025 to $20 million, and authorizing the repurchase of up to $20 million in shares during calendar year 2026) (the “…

Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant Revolving Credit Facility Amendment On November 25, 2025, Hudson Technologies Company (“HTC”) and Hudson Holdings, Inc. (“Holdings”), as borrowers (collectively, the “Borrowers”), and Hudson Technologies, Inc. (the “Company”) as a guarantor, entered into a Fourth Amendment to Amended and Restated Credit Agreement dated November 25, 2025 (the “Fourth Amendment”) with Wells Fargo Ba…

Entry into a Material Definitive Agreement See

Chairman of the Board, President and Chief Executive Officer — Kenneth Gaglione: Mr. Gaglione was promoted to Chairman of the Board, President and Chief Executive Officer.

Results of Operations and Financial Condition On November 5, 2025, Hudson Technologies, Inc. (the “Company”) issued a press release announcing its financial results for the third quarter ended September 30, 2025. A copy of the press release is furnished herewith as Exhibit 99.1.

Chairman of the Board, President and Chief Executive Officer — Brian F. Coleman: Brian F. Coleman stepped down from his positions as Chairman of the Board, President and Chief Executive Officer.

and Item 7.01, including Exhibit 99.1, 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 of that section, nor shall it be deemed incorporated by reference into any other filing under the Securities Act of 1933, as amended, or the Exchange Act, except as expressly set forth by specific reference in such a filing.

Results of Operations and Financial Condition On July 30, 2025, Hudson Technologies, Inc. (the “Company”) issued a press release announcing its financial results for the second quarter ended June 30, 2025. A copy of the press release is furnished herewith as Exhibit 99.1.

Entry into a Material Definitive Agreement See

Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant Revolving Credit Facility (“Wells Fargo Facility”) Amendment On June 23, 2025, Hudson Technologies Company (“HTC”) and Hudson Holdings, Inc. (“Holdings”), as borrowers (collectively, the “Borrowers”), and Hudson Technologies, Inc. (the “Company”) as a guarantor, entered into a Third Amendment to Amended and Restated Credit Agreement dated June 23, 2025 (the “Third Amendment”) with…

Results of Operations and Financial Condition On May 7, 2025, Hudson Technologies, Inc. (the “Company”) issued a press release announcing its financial results for the first quarter ended March 31, 2025. A copy of the press release is furnished herewith as Exhibit 99.1.

Results of Operations and Financial Condition On March 6, 2025, Hudson Technologies, Inc. (the “Company”) issued a press release announcing its financial results for the fourth quarter and fiscal year ended December 31, 2024. A copy of the press release is furnished herewith as Exhibit 99.1.

Results of Operations and Financial Condition On November 4, 2024, Hudson Technologies, Inc. (the “Company”) issued a press release announcing its financial results for the third quarter ended September 30, 2024. A copy of the press release is furnished herewith as Exhibit 99.1.

Regulation FD Disclosure On October 25, 2024, the Company issued a press release announcing that the Company’s Board of Directors has approved an increase to its previously disclosed share repurchase program pursuant to which the Company may now purchase up to $20 million in shares of the Company’s common stock (consisting of up to $10 million in shares during each of calendar year 2024 and 2025) (the “Repurchase Program”). Under the Repurchase Program, the Company may purchase shares of its…

Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant Revolving Credit Facility Amendment On October 23, 2024, Hudson Technologies Company (“HTC”) and Hudson Holdings, Inc. (“Holdings”), as borrowers (collectively, the “Borrowers”), and Hudson Technologies, Inc. (the “Company”) as a guarantor, entered into a Second Amendment to Amended and Restated Credit Agreement dated October 23, 2024 (the “Second Amendment”) with Wells Fargo Bank…