HUDSON TECHNOLOGIES INC /NY — Director's Dealing 2013

May 9, 2013

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: HUDSON TECHNOLOGIES INC /NY (HDSN)
CIK: 0000925528
Period of Report: 2013-05-07

Reporting Person: HARKINS CHARLES F (VP Sales & Marketing)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2013-05-07	Common Stock	M	7900	$1.02	Acquired	7900	Direct
2013-05-07	Common Stock	M	78600	$0.85	Acquired	86500	Direct
2013-05-07	Common Stock	M	9623	$1.26	Acquired	96123	Direct
2013-05-07	Common Stock	S	96123	$3.6967	Disposed	0	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2013-05-07	Stock Option (Right to Buy)	$1.02	M	7900	Disposed	2016-10-10	Common Stock (7900)	Direct
2013-05-07	Stock Option (Right to Buy)	$0.85	M	78600	Disposed	2017-11-20	Common Stock (78600)	Direct
2013-05-07	Stock Option (Right to Buy)	$1.26	M	9623	Disposed	2019-12-07	Common Stock (9623)	Direct

Footnotes

F1: Excludes 234,364 shares that may be purchased pursuant to stock options.

F2: Excludes 155,764 shares that may be purchased pursuant to stock options.

F3: Excludes 146,141 shares that may be purchased pursuant to stock options.