HUDSON TECHNOLOGIES INC /NY

No director or officer of the Company adopted or terminated a Rule 10b5-1 trading arrangement and/or anon-rule 10b5-1 trading arrangement (as such terms are defined in Item 408(a) of Regulation S-K) during the quarter ended June 30, 2025.

On July 31, 2025, the Company entered into an agreement with Brian J. Bertaux, its Vice President, Chief Financial Officer and Secretary, pursuant to which Mr. Bertaux has agreed to certain covenants and restrictions, which include an agreement that Mr. Bertaux will not compete with the Company in the United States for a period of twelve months after his termination for any reason. The agreement also provides that Mr. Bertaux is entitled to sick leave for up to one hundred twenty days with continuation of at least 75% of Mr. Bertaux’s salary after the commencement of his sick leave. The agreement further provides that in the event of his involuntary separation without cause, or in the event he becomes disabled, or in the event of his voluntary separation for a good reason as enumerated in the agreement, Mr. Bertaux will receive severance payments, in the form of the continuation of his annual base salary and benefits for a period of twelve months, and a lump sum payment, subject to performance criteria, equivalent to the highest bonus paid to him in the three years prior to his termination, pro-rated to the date of his termination. In addition, the agreement provides that in the event of his involuntary separation without cause, or in the event he becomes disabled, or in the event of his voluntary separation for a good reason as enumerated in the agreement, all stock options, stock appreciation rights, and any similar rights which Mr. Bertaux holds on the date of termination of employment shall become fully vested and be exercisable on the date of termination of employment, and shall remain exercisable following the termination of employment until (i) expiration

of the twelve month severance period, (ii) termination of severance benefits due to a breach of the agreement by Mr. Bertaux, or (iii) expiration of the original term of the stock option, stock appreciation right or similar right, whichever first occurs.