HUDSON TECHNOLOGIES INC /NY — 4/A Filings
47 4/A filings on record
This page lists all 4/A filings submitted to the SEC by HUDSON TECHNOLOGIES INC /NY (HDSN), sorted by most recent first. Each row links to the full filing on EdgarLookup. HUDSON TECHNOLOGIES INC /NY has filed 47 4/A documents with the SEC since 2004. To view all SEC filings by HUDSON TECHNOLOGIES INC /NY, see the full filings list.
All
10-K
10-K/A
10-Q
10KSB
10KSB/A
10KSB40
10QSB
10QSB/A
11-K
144
3
4
4/A
424B3
424B5
5
8-K
8-K/A
ARS
CORRESP
DEF 14A
DEFA14A
DEFR14A
DEFS14A
EFFECT
NT 10-K
NT 10-Q
PRE 14A
PRER14A
PRES14A
REGDEX
REGDEX/A
S-3
S-3/A
S-3MEF
S-8
SB-2
SB-2/A
SC 13D
SC 13D/A
SC 13G
SC 13G/A
SC TO-I
SC TO-I/A
SCHEDULE 13D
SCHEDULE 13G
SCHEDULE 13G/A
UPLOAD
| Form | Description | Accession Number | Filed | Period |
|---|---|---|---|---|
| 4/A | PRIMARY DOCUMENT | 0001250706-25-000004 | Dec 15, 2025 | Dec 5, 2025 |
| 4/A | AMENDED STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES | 0001062993-23-002371 | Feb 7, 2023 | Jun 9, 2021 |
| 4/A | PRIMARY DOCUMENT | 0001010541-20-000003 | Jan 7, 2020 | Dec 19, 2019 |
| 4/A | PRIMARY DOCUMENT | 0001010541-16-000058 | Aug 30, 2016 | Jul 18, 2016 |
| 4/A | PRIMARY DOCUMENT | 0001010541-16-000057 | Aug 30, 2016 | Jul 18, 2016 |
| 4/A | PRIMARY DOCUMENT | 0001010541-16-000056 | Aug 30, 2016 | Jul 18, 2016 |
| 4/A | PRIMARY DOCUMENT | 0001010541-16-000055 | Aug 30, 2016 | Aug 22, 2016 |
| 4/A | PRIMARY DOCUMENT | 0001010541-16-000054 | Aug 30, 2016 | Jul 18, 2016 |
| 4/A | PRIMARY DOCUMENT | 0001010541-16-000049 | Aug 16, 2016 | Aug 10, 2016 |
| 4/A | PRIMARY DOCUMENT | 0001010541-16-000048 | Aug 16, 2016 | Aug 5, 2016 |
| 4/A | PRIMARY DOCUMENT | 0001010541-16-000039 | Jun 27, 2016 | Feb 4, 2016 |
| 4/A | PRIMARY DOCUMENT | 0001010541-16-000037 | Mar 29, 2016 | Mar 23, 2016 |
| 4/A | PRIMARY DOCUMENT | 0001010541-15-000009 | Mar 24, 2015 | Mar 12, 2015 |
| 4/A | PRIMARY DOCUMENT | 0001010541-15-000008 | Mar 23, 2015 | Mar 12, 2015 |
| 4/A | PRIMARY DOCUMENT | 0001010541-14-000018 | Dec 23, 2014 | Dec 22, 2014 |
| 4/A | PRIMARY DOCUMENT | 0001010541-13-000007 | Mar 8, 2013 | Mar 7, 2013 |
| 4/A | PRIMARY DOCUMENT | 0001010541-12-000014 | Sep 6, 2012 | Aug 28, 2012 |
| 4/A | PRIMARY DOCUMENT | 0001010541-10-000025 | Jul 30, 2010 | Jun 14, 2010 |
| 4/A | PRIMARY DOCUMENT | 0001010541-10-000024 | Jul 30, 2010 | May 25, 2010 |
| 4/A | PRIMARY DOCUMENT | 0001010541-10-000009 | Jan 26, 2010 | Oct 20, 2009 |
| 4/A | PRIMARY DOCUMENT | 0001010541-10-000008 | Jan 26, 2010 | Oct 20, 2009 |
| 4/A | PRIMARY DOCUMENT | 0001010541-10-000007 | Jan 26, 2010 | Oct 20, 2009 |
| 4/A | PRIMARY DOCUMENT | 0001010541-10-000006 | Jan 26, 2010 | Dec 17, 2009 |
| 4/A | PRIMARY DOCUMENT | 0001010541-10-000005 | Jan 26, 2010 | Dec 17, 2009 |
| 4/A | PRIMARY DOCUMENT | 0001010541-10-000004 | Jan 26, 2010 | Dec 17, 2009 |
| 4/A | PRIMARY DOCUMENT | 0001010541-10-000003 | Jan 26, 2010 | Dec 17, 2009 |
| 4/A | PRIMARY DOCUMENT | 0001010541-10-000002 | Jan 26, 2010 | Dec 17, 2009 |
| 4/A | PRIMARY DOCUMENT | 0001010541-10-000001 | Jan 26, 2010 | Dec 17, 2009 |
| 4/A | PRIMARY DOCUMENT | 0001010541-08-000015 | May 16, 2008 | May 13, 2008 |
| 4/A | PRIMARY DOCUMENT | 0001010541-08-000014 | May 16, 2008 | May 12, 2008 |
| 4/A | PRIMARY DOCUMENT | 0001010541-07-000032 | Jul 9, 2007 | Jun 28, 2007 |
| 4/A | PRIMARY DOCUMENT | 0001010541-07-000031 | Jul 9, 2007 | Jun 28, 2007 |
| 4/A | PRIMARY DOCUMENT | 0001010541-07-000030 | Jul 9, 2007 | Dec 28, 2005 |
| 4/A | PRIMARY DOCUMENT | 0001010541-07-000023 | Jul 9, 2007 | Jun 28, 2007 |
| 4/A | PRIMARY DOCUMENT | 0001010541-05-000082 | Dec 12, 2005 | Nov 29, 2005 |
| 4/A | PRIMARY DOCUMENT | 0001010541-05-000077 | Nov 16, 2005 | Nov 9, 2005 |
| 4/A | PRIMARY DOCUMENT | 0001010541-05-000062 | Sep 15, 2005 | Sep 13, 2005 |
| 4/A | PRIMARY DOCUMENT | 0001010541-05-000061 | Sep 15, 2005 | Dec 14, 2004 |
| 4/A | PRIMARY DOCUMENT | 0001010541-05-000054 | Sep 6, 2005 | Sep 1, 2005 |
| 4/A | PRIMARY DOCUMENT | 0001010541-05-000051 | Aug 23, 2005 | Aug 15, 2005 |
| 4/A | PRIMARY DOCUMENT | 0001010541-04-000010 | Mar 9, 2004 | Mar 5, 2004 |
| 4/A | PRIMARY DOCUMENT | 0001010541-03-000015 | Dec 23, 2003 | Dec 19, 2003 |
| 4/A | PRIMARY DOCUMENT | 0001010541-03-000009 | Dec 18, 2003 | Oct 23, 2001 |
| 4/A | PRIMARY DOCUMENT | 0001010541-03-000007 | Dec 17, 2003 | Oct 30, 2003 |
| 4/A | PRIMARY DOCUMENT | 0001010541-03-000004 | Nov 21, 2003 | Apr 7, 2003 |
| 4/A | PRIMARY DOCUMENT | 0001010541-03-000003 | Nov 21, 2003 | Apr 7, 2003 |
| 4/A | PRIMARY DOCUMENT | 0001010541-03-000002 | Nov 21, 2003 | Apr 7, 2003 |