HUDSON TECHNOLOGIES INC

Ticker: HDSN CUSIP: 444144109 Class: Common Stock

ARDSLEY ADVISORY PARTNERS LP's Holding History (CIK: 0000900529)

Note: Option positions (PUT/CALL) are excluded.

Q1 2017

Shares 75,000 Value ($000) $495 Avg Close $7.28 Range $6.02 - $8.28

Q4 2016

Shares 125,000 Value ($000) $1,001 Avg Close $7.06 Range $5.55 - $8.50

Period	Shares	Value ($000)	Average Close	Price Range
Q1 2017	75,000	$495	$7.28	$6.02 - $8.28
Q4 2016	125,000	$1,001	$7.06	$5.55 - $8.50