Company · CIK 720500 # AMTECH SYSTEMS INC | CIK | [720500](https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=0000720500) (SEC EDGAR) | | --- | --- | | Industry (SIC) | 3559 — Special Industry Machinery, NEC | | Incorporated in | AZ | | Business address | AZ | | Listed | ASYS (Nasdaq) | | First annual or quarterly report | 1995-05-15 | ## Offerings 7 registrations | Registration | Label and status | First filed | Last event | Filings | | --- | --- | --- | --- | --- | | 333-294296 | Shelf Effective | 2026-03-13 | 2026-06-03 | 4 | | 333-215604 | Shelf Effective | 2017-01-18 | 2017-08-18 | 4 | | 333-176269 | Shelf Withdrawn | 2011-08-12 | 2012-01-23 | 3 | | 333-172115 | Shelf Withdrawn | 2011-02-08 | 2011-09-09 | 3 | | 333-146856 | Registered company Final prospectus | 2007-10-23 | 2007-11-16 | 5 | | 333-139592 | Registered company Final prospectus | 2006-12-22 | 2007-02-01 | 5 | | 333-131044 | Shelf Dormant | 2006-01-13 | 2006-01-13 | 1 | ## Filings 26 | Filed | Filing | Registration | Accession | | --- | --- | --- | --- | | 2026-06-03 | [424B5](https://www.sec.gov/Archives/edgar/data/720500/000072050026000007/0000720500-26-000007-index.htm) Shelf takedown | 333-294296 | 0000720500-26-000007 | | 2026-06-01 | [424B5](https://www.sec.gov/Archives/edgar/data/720500/000072050026000005/0000720500-26-000005-index.htm) Shelf takedown | 333-294296 | 0000720500-26-000005 | | 2026-03-23 | [EFFECT](https://www.sec.gov/Archives/edgar/data/720500/999999999526000911/9999999995-26-000911-index.htm) Declared effective | 333-294296 | 9999999995-26-000911 | | 2026-03-13 | [S-3](https://www.sec.gov/Archives/edgar/data/720500/000072050026000002/0000720500-26-000002-index.htm) Shelf registered | 333-294296 | 0000720500-26-000002 | | 2017-08-18 | [424B5](https://www.sec.gov/Archives/edgar/data/720500/000119312517261831/0001193125-17-261831-index.htm) Shelf takedown | 333-215604 | 0001193125-17-261831 | | 2017-08-17 | [424B5](https://www.sec.gov/Archives/edgar/data/720500/000119312517261152/0001193125-17-261152-index.htm) Shelf takedown | 333-215604 | 0001193125-17-261152 | | 2017-02-06 | [EFFECT](https://www.sec.gov/Archives/edgar/data/720500/999999999517000309/9999999995-17-000309-index.htm) Declared effective | 333-215604 | 9999999995-17-000309 | | 2017-01-18 | [S-3](https://www.sec.gov/Archives/edgar/data/720500/000072050017000004/0000720500-17-000004-index.htm) Shelf registered | 333-215604 | 0000720500-17-000004 | | 2014-12-22 | [EFFECT](https://www.sec.gov/Archives/edgar/data/720500/999999999514003779/9999999995-14-003779-index.htm) Declared effective | 333-200558 | 9999999995-14-003779 | | 2012-01-23 | [RW](https://www.sec.gov/Archives/edgar/data/720500/000144530512000089/0001445305-12-000089-index.htm) Withdrawn | 333-176269 | 0001445305-12-000089 | | 2011-09-14 | [EFFECT](https://www.sec.gov/Archives/edgar/data/720500/999999999511002709/9999999995-11-002709-index.htm) Declared effective | 333-176269 | 9999999995-11-002709 | | 2011-09-09 | [RW](https://www.sec.gov/Archives/edgar/data/720500/000072050011000016/0000720500-11-000016-index.htm) Withdrawn | 333-172115 | 0000720500-11-000016 | | 2011-08-12 | [S-3](https://www.sec.gov/Archives/edgar/data/720500/000072050011000005/0000720500-11-000005-index.htm) Shelf registered | 333-176269 | 0000720500-11-000005 | | 2011-05-13 | [EFFECT](https://www.sec.gov/Archives/edgar/data/720500/999999999511001538/9999999995-11-001538-index.htm) Declared effective | 333-172115 | 9999999995-11-001538 | | 2011-02-08 | [S-3](https://www.sec.gov/Archives/edgar/data/720500/000120677411000220/0001206774-11-000220-index.htm) Shelf registered | 333-172115 | 0001206774-11-000220 | | 2007-11-16 | [424B1](https://www.sec.gov/Archives/edgar/data/720500/000120677407002687/0001206774-07-002687-index.htm) Final prospectus | 333-146856 | 0001206774-07-002687 | | 2007-11-15 | [EFFECT](https://www.sec.gov/Archives/edgar/data/720500/999999999507004528/9999999995-07-004528-index.htm) Declared effective | 333-146856 | 9999999995-07-004528 | | 2007-11-13 | [S-1/A](https://www.sec.gov/Archives/edgar/data/720500/000120677407002645/0001206774-07-002645-index.htm) Amendment | 333-146856 | 0001206774-07-002645 | | 2007-11-07 | [S-1/A](https://www.sec.gov/Archives/edgar/data/720500/000120677407002547/0001206774-07-002547-index.htm) Amendment | 333-146856 | 0001206774-07-002547 | | 2007-10-23 | [S-1](https://www.sec.gov/Archives/edgar/data/720500/000120677407002434/0001206774-07-002434-index.htm) Registration filed | 333-146856 | 0001206774-07-002434 | | 2007-02-01 | [424B1](https://www.sec.gov/Archives/edgar/data/720500/000120677407000289/0001206774-07-000289-index.htm) Final prospectus | 333-139592 | 0001206774-07-000289 | | 2007-01-31 | [EFFECT](https://www.sec.gov/Archives/edgar/data/720500/999999999507000385/9999999995-07-000385-index.htm) Declared effective | 333-139592 | 9999999995-07-000385 | | 2007-01-30 | [S-1/A](https://www.sec.gov/Archives/edgar/data/720500/000120677407000263/0001206774-07-000263-index.htm) Amendment | 333-139592 | 0001206774-07-000263 | | 2007-01-16 | [S-1/A](https://www.sec.gov/Archives/edgar/data/720500/000120677407000089/0001206774-07-000089-index.htm) Amendment | 333-139592 | 0001206774-07-000089 | | 2006-12-22 | [S-1](https://www.sec.gov/Archives/edgar/data/720500/000120677406002657/0001206774-06-002657-index.htm) Registration filed | 333-139592 | 0001206774-06-002657 | | 2006-01-13 | [S-3](https://www.sec.gov/Archives/edgar/data/720500/000120677406000049/0001206774-06-000049-index.htm) Shelf registered | 333-131044 | 0001206774-06-000049 | [All filings of this company](https://equitycapital.markets/filings?cik=720500) · [CSV](https://equitycapital.markets/filings.csv?cik=720500) --- Source page: https://equitycapital.markets/company/720500 · Data: U.S. SEC EDGAR · CC BY 4.0