RIDGEFIELD ACQUISITION CORP

Symbol
RDGA on OTC
Industry
Blank Checks (Office Of Real Estate & Construction)
Business address
3827 S Carson St, Unit 505 25 Pmb 1078, Carson City, NV, 89701
State of incorporation
CO
Fiscal year end
31 December
Former names
BIO MEDICAL AUTOMATION INC (to 22 Nov 2002), OZO DIVERSIFIED AUTOMATION INC /CO/ (to 22 Mar 1999)
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RIDGEFIELD ACQUISITION CORP has filed 237 SEC EDGAR filings since 13 Nov 1995

Latest Filings

Form type Document Filing Description Filing date Reporting date File number(s)
SC 13E3/A Open Document Open Filing SC 13E3/A 12 Dec 2025 005-39963
DEF 14C Open Document Open Filing DEF 14C 12 Dec 2025 16 Dec 2025 000-16335
10-Q Open Document | Data Open Filing 10-Q 07 Nov 2025 30 Sep 2025 000-16335
PRER14C Open Document Open Filing PRER14C 20 Oct 2025 000-16335
SC 13E3 Open Document | Data Open Filing SC 13E3 20 Oct 2025 005-39963
PRE 14C Open Document Open Filing PRE 14C 17 Sep 2025 17 Sep 2025 000-16335
10-Q Open Document | Data Open Filing 10-Q 08 Aug 2025 30 Jun 2025 000-16335
10-Q Open Document | Data Open Filing 10-Q 09 May 2025 31 Mar 2025 000-16335
10-K Open Document | Data Open Filing 10-K 14 Mar 2025 31 Dec 2024 000-16335
10-Q Open Document | Data Open Filing 10-Q 08 Nov 2024 30 Sep 2024 000-16335
10-Q Open Document | Data Open Filing 10-Q 08 Aug 2024 30 Jun 2024 000-16335
10-Q Open Document | Data Open Filing 10-Q 13 May 2024 31 Mar 2024 000-16335
SC 13D/A Open Document Open Filing SC 13D/A 29 Apr 2024 005-39963
4 Open Document Open Filing OWNERSHIP DOCUMENT 25 Apr 2024 23 Apr 2024
8-K Open Document | Data Open Filing FORM 8-K 25 Apr 2024 23 Apr 2024 000-16335
10-K Open Document | Data Open Filing 10-K 12 Mar 2024 31 Dec 2023 000-16335
8-K Open Document | Data Open Filing FORM 8-K 04 Dec 2023 04 Dec 2023 000-16335
10-Q Open Document | Data Open Filing 10-Q 13 Nov 2023 30 Sep 2023 000-16335
SC 13D/A Open Document Open Filing SC 13D/A 17 Oct 2023 005-39963
4 Open Document Open Filing OWNERSHIP DOCUMENT 13 Oct 2023 11 Oct 2023
10-Q Open Document | Data Open Filing 10-Q 11 Aug 2023 30 Jun 2023 000-16335
10-Q Open Document | Data Open Filing 10-Q 11 May 2023 31 Mar 2023 000-16335
10-K Open Document | Data Open Filing 10-K 28 Feb 2023 31 Dec 2022 000-16335
10-Q Open Document | Data Open Filing 10-Q 04 Nov 2022 30 Sep 2022 000-16335
8-K Open Document | Data Open Filing FORM 8-K 31 Oct 2022 27 Sep 2022 000-16335
10-Q Open Document | Data Open Filing 10-Q 28 Jul 2022 30 Jun 2022 000-16335
SC 13D/A Open Document Open Filing SC 13D/A 01 Jul 2022 005-39963
10-Q Open Document | Data Open Filing 10-Q 10 May 2022 31 Mar 2022 000-16335
8-K Open Document | Data Open Filing FORM 8-K 28 Mar 2022 23 Mar 2022 000-16335
10-K Open Document | Data Open Filing 10-K 11 Mar 2022 31 Dec 2021 000-16335
10-Q Open Document | Data Open Filing FORM 10-Q 28 Oct 2021 30 Sep 2021 000-16335
10-Q Open Document | Data Open Filing FORM 10-Q 12 Aug 2021 30 Jun 2021 000-16335
10-Q Open Document | Data Open Filing FORM 10-Q 06 May 2021 31 Mar 2021 000-16335
4 Open Document Open Filing OWNERSHIP DOCUMENT 30 Mar 2021 26 Mar 2021
8-K Open Document Open Filing FORM 8-K 29 Mar 2021 26 Mar 2021 000-16335
10-K Open Document | Data Open Filing FORM 10-K 04 Mar 2021 31 Dec 2020 000-16335
10-Q Open Document | Data Open Filing FORM 10-Q 29 Oct 2020 30 Sep 2020 000-16335
10-Q Open Document | Data Open Filing FORM 10-Q 04 Aug 2020 30 Jun 2020 000-16335
10-Q Open Document | Data Open Filing FORM 10-Q 12 May 2020 31 Mar 2020 000-16335
10-K Open Document | Data Open Filing FORM 10-K 25 Feb 2020 31 Dec 2019 000-16335
10-Q Open Document | Data Open Filing FORM 10-Q 31 Oct 2019 30 Sep 2019 000-16335
10-Q Open Document | Data Open Filing FORM 10-Q 01 Aug 2019 30 Jun 2019 000-16335
10-Q Open Document | Data Open Filing FORM 10-Q 09 May 2019 31 Mar 2019 000-16335
10-K Open Document | Data Open Filing FORM 10-K 28 Mar 2019 31 Dec 2018 000-16335
10-Q Open Document | Data Open Filing FORM 10-Q 30 Oct 2018 30 Sep 2018 000-16335
10-Q Open Document | Data Open Filing FORM 10-Q 31 Jul 2018 30 Jun 2018 000-16335
10-Q Open Document | Data Open Filing FORM 10-Q 10 May 2018 31 Mar 2018 000-16335
10-K Open Document | Data Open Filing FORM 10-K 30 Mar 2018 31 Dec 2017 000-16335
8-K Open Document Open Filing FORM 8-K 07 Mar 2018 27 Feb 2018 000-16335
15-12G/A Open Document Open Filing 15-12G/A 15 Feb 2018 000-16335
15-12G Open Document Open Filing 15-12G 10 Jan 2018 000-16335
10-Q Open Document | Data Open Filing FORM 10-Q 13 Nov 2017 30 Sep 2017 000-16335
10-Q Open Document | Data Open Filing FORM 10-Q 14 Aug 2017 30 Jun 2017 000-16335
10-Q Open Document | Data Open Filing FORM 10-Q 12 May 2017 31 Mar 2017 000-16335
10-K Open Document | Data Open Filing FORM 10-K 31 Mar 2017 31 Dec 2016 000-16335
10-Q/A Open Document | Data Open Filing 10-Q/A 17 Nov 2016 30 Sep 2016 000-16335
10-Q Open Document | Data Open Filing FORM 10-Q 03 Nov 2016 30 Sep 2016 000-16335
10-Q Open Document | Data Open Filing FORM 10-Q 19 Aug 2016 30 Jun 2016 000-16335
NT 10-Q Open Document Open Filing NOTIFICATION OF LATE FILING 16 Aug 2016 30 Jun 2016 000-16335
10-Q Open Document | Data Open Filing 10-Q 13 May 2016 31 Mar 2016 000-16335
10-K Open Document | Data Open Filing FORM 10-K 30 Mar 2016 31 Dec 2015 000-16335
10-Q Open Document | Data Open Filing FORM 10-Q 13 Nov 2015 30 Sep 2015 000-16335
10-Q Open Document | Data Open Filing 10-Q 13 Aug 2015 30 Jun 2015 000-16335
8-K Open Document Open Filing FORM 8-K 02 Jul 2015 01 Jul 2015 000-16335
8-K Open Document Open Filing FORM 8-K 23 Jun 2015 18 Jun 2015 000-16335
10-Q Open Document | Data Open Filing FORM 10-Q 12 May 2015 31 Mar 2015 000-16335
10-K Open Document | Data Open Filing 10-K 14 Apr 2015 31 Dec 2014 000-16335
NT 10-K Open Document Open Filing NT 10-K 31 Mar 2015 31 Dec 2014 000-16335
8-K Open Document Open Filing FORM 8-K 05 Mar 2015 01 Mar 2015 000-16335
10-Q Open Document | Data Open Filing FORM 10-Q 14 Nov 2014 30 Sep 2014 000-16335
10-Q Open Document | Data Open Filing 10-Q 13 Aug 2014 30 Jun 2014 000-16335
10-Q Open Document | Data Open Filing 10-Q 13 May 2014 31 Mar 2014 000-16335
8-K Open Document Open Filing FORM 8-K 02 May 2014 01 May 2014 000-16335
10-K Open Document | Data Open Filing 10-K 28 Mar 2014 31 Dec 2013 000-16335
10-Q Open Document | Data Open Filing FORM 10-Q 13 Nov 2013 30 Sep 2013 000-16335
10-Q Open Document | Data Open Filing FORM 10-Q 12 Aug 2013 30 Jun 2013 000-16335
10-Q Open Document | Data Open Filing 10-Q 10 May 2013 31 Mar 2013 000-16335
10-K Open Document | Data Open Filing 10-K 27 Mar 2013 31 Dec 2012 000-16335
10-Q Open Document | Data Open Filing FORM 10-Q 14 Nov 2012 30 Sep 2012 000-16335
10-Q Open Document | Data Open Filing FORM 10-Q 09 Aug 2012 30 Jun 2012 000-16335
10-Q Open Document | Data Open Filing FORM 10-Q 15 May 2012 31 Mar 2012 000-16335
10-K Open Document | Data Open Filing FORM 10-K 28 Mar 2012 31 Dec 2011 000-16335