HUDSON TECHNOLOGIES INC /NY — Director's Dealing 2013

May 22, 2013

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: HUDSON TECHNOLOGIES INC /NY (HDSN)
CIK: 0000925528
Period of Report: 2013-05-20

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

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2013-05-20	Common Stock	M	62377	$1.26	Acquired	62377	Direct
2013-05-20	Common Stock	M	8139	$1.76	Acquired	70516	Direct
2013-05-20	Common Stock	M	2484	$1.76	Acquired	73000	Direct
2013-05-20	Common Stock	S	73000	$3.95	Disposed	0	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2013-05-20	Stock Option (right to buy)	$1.26	M	62377	Disposed	2019-12-17	Common Stock (62377)	Direct
2013-05-20	Stock Option (right to buy)	$1.76	M	8139	Disposed	2015-12-19	Common Stock (8139)	Direct
2013-05-20	Stock Option (right to buy)	$1.76	M	2384	Disposed	2015-12-19	Common Stock (2484)	Direct

Footnotes

F1: Excludes 83,764 shares that may be purchased pursuant to stock options.

F2: Excludes 75,625 shares that may be purchased pursuant to stock options.

F3: Excludes 73,141 shares that may be purchased pursuant to stock options.