AMTECH SYSTEMS INC — SC 13D/A Filings
25 SC 13D/A filings on record
This page lists all SC 13D/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 25 SC 13D/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 13D/A | SC 13D/A | 0001104659-24-061136 | May 14, 2024 | — |
| SC 13D/A | SC 13D/A | 0001104659-22-026737 | Feb 24, 2022 | — |
| SC 13D/A | — | 0000919574-21-001795 | Feb 18, 2021 | — |
| SC 13D/A | SC 13D/A | 0001104659-20-008797 | Jan 30, 2020 | — |
| SC 13D/A | SCHEDULE 13D AMENDMENT NO. 4 | 0000893838-18-000031 | Nov 27, 2018 | — |
| SC 13D/A | SCHEDULE 13D AMENDMENT NO. 3 | 0000893838-18-000021 | Jul 17, 2018 | — |
| SC 13D/A | SCHEDULE 13D AMENDMENT NO. 2 | 0000893838-17-000074 | Dec 18, 2017 | — |
| SC 13D/A | SCHEDULE 13D AMENDMENT NO. 1 | 0000893838-17-000065 | Aug 24, 2017 | — |
| SC 13D/A | SCHEDULE 13D/A | 0001645706-16-000003 | Mar 18, 2016 | — |
| SC 13D/A | SC 13D/A | 0000950123-11-007237 | Jan 31, 2011 | — |
| SC 13D/A | SC 13D/A | 0000950123-10-089515 | Sep 28, 2010 | — |
| SC 13D/A | SC 13D/A | 0000950123-10-084471 | Sep 8, 2010 | — |
| SC 13D/A | SC 13D/A | 0000950123-10-084368 | Sep 8, 2010 | — |
| SC 13D/A | SC 13D/A | 0000950144-09-001489 | Feb 20, 2009 | — |
| SC 13D/A | AMTECH SYSTEMS, INC. - FORM SC 13D/A RICHARD L. SCOTT | 0000950144-08-007368 | Sep 30, 2008 | — |
| SC 13D/A | AMTECH SYSTEMS, INC. - FORM SC 13D/A RICHARD L. SCOTT | 0000950144-07-009072 | Oct 3, 2007 | — |
| SC 13D/A | AMTECH SYSTEMS, INC. - FORM SC 13D/A RICHARD L. SCOTT | 0000950144-07-006640 | Jul 17, 2007 | — |
| SC 13D/A | AMTECH SYSTEMS, INC. | 0000950144-07-001371 | Feb 16, 2007 | — |
| SC 13D/A | — | 0000926274-07-000011 | Feb 12, 2007 | — |
| SC 13D/A | — | 0000921895-06-002607 | Dec 27, 2006 | — |
| SC 13D/A | AMTECH SYSTEMS, INC. - FORM SC 13D/A RICHARD L. SCOTT | 0000950144-06-011154 | Nov 27, 2006 | — |
| SC 13D/A | AMTECH SYSTEMS, INC./RICHARD L. SCOTT | 0000950144-06-006225 | Jun 27, 2006 | — |
| SC 13D/A | — | 0000926274-06-000140 | May 16, 2006 | — |
| SC 13D/A | — | 0000926274-06-000139 | May 16, 2006 | — |
| SC 13D/A | AMTECH SYSTEMS, INC. - FORM SC 13D/A | 0000950144-06-005037 | May 15, 2006 | — |