AMTECH SYSTEMS INC — SC 13G/A Filings
43 SC 13G/A filings on record
This page lists all SC 13G/A filings submitted to the SEC by AMTECH SYSTEMS INC (ASYS), sorted by most recent first. Each row links to the full filing on EdgarLookup. AMTECH SYSTEMS INC has filed 43 SC 13G/A documents with the SEC since 1995. To view all SEC filings by AMTECH SYSTEMS INC, see the full filings list.
All
10-K
10-K/A
10-K405
10-K405/A
10-Q
10-Q/A
3
3/A
4
4/A
424B1
424B3
424B5
425
5
8-A12G
8-K
8-K/A
ARS
CORRESP
CT ORDER
DEF 14A
DEFA14A
DEFM14A
DEFR14A
EFFECT
NT 10-K
NT 10-K/A
NT 10-Q
PRE 14A
REGDEX
RW
S-1
S-1/A
S-1MEF
S-3
S-3/A
S-4
S-4/A
S-8
S-8 POS
SC 13D
SC 13D/A
SC 13G
SC 13G/A
SCHEDULE 13D/A
SCHEDULE 13G/A
SD
UPLOAD
| Form | Description | Accession Number | Filed | Period |
|---|---|---|---|---|
| SC 13G/A | SEC SCHEDULE 13G | 0000354204-24-004700 | Oct 31, 2024 | — |
| SC 13G/A | — | 0000906304-24-000084 | Oct 15, 2024 | — |
| SC 13G/A | — | 0001398344-24-017646 | Sep 6, 2024 | — |
| SC 13G/A | ASYS 13GA 2023 FILING | 0001591546-24-000002 | Feb 12, 2024 | — |
| SC 13G/A | SEC SCHEDULE 13G | 0000354204-24-003104 | Feb 9, 2024 | — |
| SC 13G/A | — | 0000906304-24-000001 | Jan 23, 2024 | — |
| SC 13G/A | ASYS 13GA FILING | 0001591546-23-000004 | Feb 13, 2023 | — |
| SC 13G/A | SEC SCHEDULE 13G | 0000354204-23-001493 | Feb 10, 2023 | — |
| SC 13G/A | — | 0000906304-23-000075 | Feb 7, 2023 | — |
| SC 13G/A | — | 0000906304-23-000001 | Jan 23, 2023 | — |
| SC 13G/A | ASYS 2021 SC13GA | 0001591546-22-000002 | Feb 14, 2022 | — |
| SC 13G/A | SCHEDULE 13G/A | 0001104659-22-016479 | Feb 9, 2022 | — |
| SC 13G/A | SEC SCHEDULE 13G | 0000354204-22-001658 | Feb 8, 2022 | — |
| SC 13G/A | — | 0000906304-22-000001 | Jan 14, 2022 | — |
| SC 13G/A | SEC SCHEDULE 13G | 0000354204-21-000282 | Feb 12, 2021 | — |
| SC 13G/A | ASYS 13GA FILING | 0001591546-21-000004 | Feb 10, 2021 | — |
| SC 13G/A | ASYS 13G AMENDMENT NO 1 | 0001591546-20-000009 | Feb 13, 2020 | — |
| SC 13G/A | SCHEDULE 13G/A | 0001258897-20-000777 | Feb 12, 2020 | — |
| SC 13G/A | — | 0000906304-20-000075 | Feb 4, 2020 | — |
| SC 13G/A | — | 0000906304-19-000009 | Jan 14, 2019 | — |
| SC 13G/A | — | 0000906304-18-000002 | Jan 3, 2018 | — |
| SC 13G/A | — | 0000906304-17-000006 | Jan 3, 2017 | — |
| SC 13G/A | — | 0000906304-16-000333 | Jan 7, 2016 | — |
| SC 13G/A | SCHEDULE 13G AMENDMENT NO. 5 | 0000893838-15-000058 | Aug 27, 2015 | — |
| SC 13G/A | SCHEDULE 13G AMENDMENT NO. 4 | 0000893838-15-000045 | Jun 12, 2015 | — |
| SC 13G/A | — | 0000906304-15-000257 | Mar 9, 2015 | — |
| SC 13G/A | SCHEDULE 13 G AMENDMENT NO. 3 | 0000893838-15-000021 | Feb 25, 2015 | — |
| SC 13G/A | SCHEDULE 13G AMENDMENT NO. 2 | 0000893838-15-000017 | Feb 17, 2015 | — |
| SC 13G/A | SCHEDULE 13G AMENDMENT NO. 1 | 0000893838-14-000001 | Jan 3, 2014 | — |
| SC 13G/A | SCHEDULE 13G/A | 0001167674-13-000174 | Feb 11, 2013 | — |
| SC 13G/A | SCHEDULE 13G/A | 0000354204-12-000908 | Feb 14, 2012 | — |
| SC 13G/A | — | 0001085936-11-000014 | Feb 15, 2011 | — |
| SC 13G/A | — | 0001044321-11-000010 | Jan 10, 2011 | — |
| SC 13G/A | — | 0001044321-10-000189 | Nov 10, 2010 | — |
| SC 13G/A | — | 0000769993-10-000113 | Feb 12, 2010 | — |
| SC 13G/A | — | 0001044321-09-000034 | Feb 13, 2009 | — |
| SC 13G/A | AMTECH SYSTEMS, INC. | 0000902664-09-000791 | Feb 13, 2009 | — |
| SC 13G/A | SEC FILING | 0000846087-08-000031 | Feb 14, 2008 | — |
| SC 13G/A | SEC FILING | 0000902219-08-000614 | Feb 14, 2008 | — |
| SC 13G/A | ROTH & STARK SC13GA 12-31-2007 | 0001140361-08-004198 | Feb 14, 2008 | — |
| SC 13G/A | — | 0001044321-08-000050 | Feb 13, 2008 | — |
| SC 13G/A | AMTECH SYSTEMS, INC. | 0000902664-08-000176 | Jan 18, 2008 | — |
| SC 13G/A | AMTECHSYSTEMSINC13GAMD1 | 0001056568-06-000090 | Nov 6, 2006 | — |