HUDSON TECHNOLOGIES INC /NY — Director's Dealing 2021

May 27, 2021

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: HUDSON TECHNOLOGIES INC /NY (HDSN)
CIK: 0000925528
Period of Report: 2021-05-25

Reporting Person: MANDRACCHIA STEPHEN P (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-05-25	Common Stock	S	76074	$2.37	Disposed	366926	Direct
2021-05-25	Common Stock	S	76073	$2.37	Disposed	631111	Indirect
2021-05-26	Common Stock	S	23926	$2.48	Disposed	343000	Direct
2021-05-26	Common Stock	S	23927	$2.48	Disposed	607184	Indirect
2021-05-26	Common Stock	M	195700	$1.09	Acquired	802884	Indirect
2021-05-26	Common Stock	F	79005	$2.7	Disposed	723879	Indirect
2021-05-26	Common Stock	M	36774	$1.09	Acquired	760653	Indirect
2021-05-26	Common Stock	F	14846	$2.7	Disposed	745807	Indirect

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2021-05-26	Stock Option	$1.09	M	195700	Disposed	2021-11-30	Common Stock (195700)	Direct
2021-05-26	Stock Option	$1.09	M	36774	Disposed	2021-11-30	Common Stock (36774)	Direct

Footnotes

F1: Shares previously reported held by Mr. Mandracchia's child are no longer beneficially owned by Mr. Mandracchia in accordance with applicable SEC rules.

F2: Shares were directed to be issued to the Theresa Ann Mandracchia Family Revocable Trust.