MICHAEL M. LUDWIG

Business address
C/O Amtech Systems, Inc., 131 S Clark Drive, Tempe, AZ, 85288
Top holdings (ownership)
ASYS
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MICHAEL M. LUDWIG has filed 53 SEC EDGAR filings since 22 Oct 2003

Latest Filings

Form type Document Filing Description Filing date Reporting date File number(s)
4 Open Document Open Filing 4 07 Mar 2025 05 Mar 2025 000-11412
4 Open Document Open Filing 4 13 Mar 2024 11 Mar 2024 000-11412
4 Open Document Open Filing 4 08 Mar 2024 06 Mar 2024 000-11412
4 Open Document Open Filing 4 04 Mar 2024 01 Mar 2024 000-11412
4 Open Document Open Filing FORM 4 SUBMISSION 03 Mar 2023 01 Mar 2023 000-11412
4 Open Document Open Filing FORM 4 SUBMISSION 18 Jan 2023 13 Jan 2023 000-11412
3 Open Document Open Filing FORM 3 SUBMISSION 18 Jan 2023 13 Jan 2023 000-11412
4 Open Document Open Filing PRIMARY DOCUMENT 17 Feb 2021 12 Feb 2021 001-04347
4 Open Document Open Filing PRIMARY DOCUMENT 09 Feb 2021 07 Feb 2021 001-04347
4 Open Document Open Filing PRIMARY DOCUMENT 18 Sep 2020 17 Sep 2020 001-04347
4 Open Document Open Filing PRIMARY DOCUMENT 14 Feb 2020 12 Feb 2020 001-04347
4 Open Document Open Filing PRIMARY DOCUMENT 11 Feb 2020 07 Feb 2020 001-04347
4 Open Document Open Filing 19 Sep 2019 17 Sep 2019 001-04347
4/A Open Document Open Filing 03 Apr 2019 07 Feb 2019 001-04347
4 Open Document Open Filing 11 Feb 2019 07 Feb 2019 001-04347
3/A Open Document Open Filing 15 Oct 2018 17 Sep 2018 001-04347
4 Open Document Open Filing 19 Sep 2018 17 Sep 2018 001-04347
3 Open Document Open Filing 19 Sep 2018 17 Sep 2018 001-04347
4 Open Document Open Filing FORM 4 22 Feb 2018 20 Feb 2018 000-50307
4 Open Document Open Filing FORM 4 16 Feb 2018 15 Feb 2018 000-50307
4/A Open Document Open Filing FORM 4/A 12 Feb 2018 05 May 2015 000-50307
4 Open Document Open Filing FORM 4 12 Feb 2018 18 Sep 2015 000-50307
4 Open Document Open Filing FORM 4 14 Nov 2017 13 Nov 2017 000-50307
4 Open Document Open Filing FORM 4 24 Aug 2017 23 Aug 2017 000-50307
4 Open Document Open Filing FORM 4 22 Aug 2017 19 Aug 2017 000-50307
4 Open Document Open Filing FORM 4 21 Jul 2017 20 Jul 2017 000-50307
4 Open Document Open Filing FORM 4 31 May 2017 28 May 2017 000-50307
4 Open Document Open Filing FORM 4 09 May 2017 05 May 2017 000-50307
4 Open Document Open Filing FORM 4 03 May 2017 01 May 2017 000-50307
4 Open Document Open Filing FORM 4 22 Aug 2016 19 Aug 2016 000-50307
4 Open Document Open Filing FORM 4 02 Jun 2016 31 May 2016 000-50307
4 Open Document Open Filing FORM 4 09 May 2016 05 May 2016 000-50307
4 Open Document Open Filing FORM 4 03 May 2016 02 May 2016 000-50307
4 Open Document Open Filing FORM 4 08 Apr 2016 06 Apr 2016 000-50307
4 Open Document Open Filing PRIMARY DOCUMENT 01 Jun 2015 28 May 2015 000-50307
4 Open Document Open Filing PRIMARY DOCUMENT 08 May 2015 06 May 2015 000-50307
4 Open Document Open Filing PRIMARY DOCUMENT 07 May 2015 05 May 2015 000-50307
4 Open Document Open Filing PRIMARY DOCUMENT 06 May 2015 08 Apr 2015 000-50307
4 Open Document Open Filing PRIMARY DOCUMENT 03 Mar 2015 27 Feb 2015 000-50307
4 Open Document Open Filing PRIMARY DOCUMENT 12 Feb 2015 10 Feb 2015 000-50307
4 Open Document Open Filing PRIMARY DOCUMENT 08 May 2014 06 May 2014 000-50307
4 Open Document Open Filing PRIMARY DOCUMENT 07 May 2014 05 May 2014 000-50307
4 Open Document Open Filing PRIMARY DOCUMENT 28 Feb 2014 27 Feb 2014 000-50307
4 Open Document Open Filing PRIMARY DOCUMENT 12 Feb 2014 10 Feb 2014 000-50307
4 Open Document Open Filing PRIMARY DOCUMENT 30 Jan 2014 28 Jan 2014 000-50307