<SEC-DOCUMENT>0001193125-19-035922-index.html : 20190212
<SEC-HEADER>0001193125-19-035922.hdr.sgml : 20190212
<ACCEPTANCE-DATETIME>20190212161302
ACCESSION NUMBER:		0001193125-19-035922
CONFORMED SUBMISSION TYPE:	SC 13G
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20190212
DATE AS OF CHANGE:		20190212

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			HUDSON TECHNOLOGIES INC /NY
		CENTRAL INDEX KEY:			0000925528
		STANDARD INDUSTRIAL CLASSIFICATION:	WHOLESALE-MACHINERY, EQUIPMENT & SUPPLIES [5080]
		IRS NUMBER:				133641539
		STATE OF INCORPORATION:			NY
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-48635
		FILM NUMBER:		19590911

	BUSINESS ADDRESS:	
		STREET 1:		PO BOX 1541
		STREET 2:		ONE BLUE HILL PLAZA, 14TH FLOOR
		CITY:			PEARL RIVER
		STATE:			NY
		ZIP:			10965
		BUSINESS PHONE:		8457356000

	MAIL ADDRESS:	
		STREET 1:		PO BOX 1541
		STREET 2:		ONE BLUE HILL PLAZA, 14TH FLOOR
		CITY:			PEARL RIVER
		STATE:			NY
		ZIP:			10965

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	REFRIGERANT RECLAMATION INDUSTRIES INC
		DATE OF NAME CHANGE:	19940617

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			GRANAHAN INVESTMENT MANAGEMENT INC/MA
		CENTRAL INDEX KEY:			0001026710
		IRS NUMBER:				042856200
		STATE OF INCORPORATION:			MA
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G

	BUSINESS ADDRESS:	
		STREET 1:		404 WYMAN STREET
		STREET 2:		SUITE 460
		CITY:			WALTHAM
		STATE:			MA
		ZIP:			02451
		BUSINESS PHONE:		7818904412

	MAIL ADDRESS:	
		STREET 1:		404 WYMAN STREET
		STREET 2:		SUITE 460
		CITY:			WALTHAM
		STATE:			MA
		ZIP:			02451
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13G
<SEQUENCE>1
<FILENAME>d719881dsc13g.htm
<DESCRIPTION>SC 13G
<TEXT>
Document 1 - file: d719881dsc13g.htm

</DOCUMENT>
</SEC-DOCUMENT>