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
December 31
Former names
BIO MEDICAL AUTOMATION INC (to 11/22/2002), OZO DIVERSIFIED AUTOMATION INC /CO/ (to 3/22/1999)
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Ridgefield Acquisition Corp has filed 237 SEC EDGAR filings since 11/13/1995

Latest Filings

Form type Document Filing Description Filing date Reporting date File number(s)
SC 13E3/A Open Document Open Filing SC 13E3/A Dec 12, 2025 005-39963
DEF 14C Open Document Open Filing DEF 14C Dec 12, 2025 Dec 16, 2025 000-16335
10-Q Open Document | Data Open Filing 10-Q Nov 7, 2025 Sep 30, 2025 000-16335
PRER14C Open Document Open Filing PRER14C Oct 20, 2025 000-16335
SC 13E3 Open Document | Data Open Filing SC 13E3 Oct 20, 2025 005-39963
PRE 14C Open Document Open Filing PRE 14C Sep 17, 2025 Sep 17, 2025 000-16335
10-Q Open Document | Data Open Filing 10-Q Aug 8, 2025 Jun 30, 2025 000-16335
10-Q Open Document | Data Open Filing 10-Q May 9, 2025 Mar 31, 2025 000-16335
10-K Open Document | Data Open Filing 10-K Mar 14, 2025 Dec 31, 2024 000-16335
10-Q Open Document | Data Open Filing 10-Q Nov 8, 2024 Sep 30, 2024 000-16335
10-Q Open Document | Data Open Filing 10-Q Aug 8, 2024 Jun 30, 2024 000-16335
10-Q Open Document | Data Open Filing 10-Q May 13, 2024 Mar 31, 2024 000-16335
SC 13D/A Open Document Open Filing SC 13D/A Apr 29, 2024 005-39963
4 Open Document Open Filing OWNERSHIP DOCUMENT Apr 25, 2024 Apr 23, 2024
8-K Open Document | Data Open Filing FORM 8-K Apr 25, 2024 Apr 23, 2024 000-16335
10-K Open Document | Data Open Filing 10-K Mar 12, 2024 Dec 31, 2023 000-16335
8-K Open Document | Data Open Filing FORM 8-K Dec 4, 2023 Dec 4, 2023 000-16335
10-Q Open Document | Data Open Filing 10-Q Nov 13, 2023 Sep 30, 2023 000-16335
SC 13D/A Open Document Open Filing SC 13D/A Oct 17, 2023 005-39963
4 Open Document Open Filing OWNERSHIP DOCUMENT Oct 13, 2023 Oct 11, 2023
10-Q Open Document | Data Open Filing 10-Q Aug 11, 2023 Jun 30, 2023 000-16335
10-Q Open Document | Data Open Filing 10-Q May 11, 2023 Mar 31, 2023 000-16335
10-K Open Document | Data Open Filing 10-K Feb 28, 2023 Dec 31, 2022 000-16335
10-Q Open Document | Data Open Filing 10-Q Nov 4, 2022 Sep 30, 2022 000-16335
8-K Open Document | Data Open Filing FORM 8-K Oct 31, 2022 Sep 27, 2022 000-16335
10-Q Open Document | Data Open Filing 10-Q Jul 28, 2022 Jun 30, 2022 000-16335
SC 13D/A Open Document Open Filing SC 13D/A Jul 1, 2022 005-39963
10-Q Open Document | Data Open Filing 10-Q May 10, 2022 Mar 31, 2022 000-16335
8-K Open Document | Data Open Filing FORM 8-K Mar 28, 2022 Mar 23, 2022 000-16335
10-K Open Document | Data Open Filing 10-K Mar 11, 2022 Dec 31, 2021 000-16335
10-Q Open Document | Data Open Filing FORM 10-Q Oct 28, 2021 Sep 30, 2021 000-16335
10-Q Open Document | Data Open Filing FORM 10-Q Aug 12, 2021 Jun 30, 2021 000-16335
10-Q Open Document | Data Open Filing FORM 10-Q May 6, 2021 Mar 31, 2021 000-16335
4 Open Document Open Filing OWNERSHIP DOCUMENT Mar 30, 2021 Mar 26, 2021
8-K Open Document Open Filing FORM 8-K Mar 29, 2021 Mar 26, 2021 000-16335
10-K Open Document | Data Open Filing FORM 10-K Mar 4, 2021 Dec 31, 2020 000-16335
10-Q Open Document | Data Open Filing FORM 10-Q Oct 29, 2020 Sep 30, 2020 000-16335
10-Q Open Document | Data Open Filing FORM 10-Q Aug 4, 2020 Jun 30, 2020 000-16335
10-Q Open Document | Data Open Filing FORM 10-Q May 12, 2020 Mar 31, 2020 000-16335
10-K Open Document | Data Open Filing FORM 10-K Feb 25, 2020 Dec 31, 2019 000-16335
10-Q Open Document | Data Open Filing FORM 10-Q Oct 31, 2019 Sep 30, 2019 000-16335
10-Q Open Document | Data Open Filing FORM 10-Q Aug 1, 2019 Jun 30, 2019 000-16335
10-Q Open Document | Data Open Filing FORM 10-Q May 9, 2019 Mar 31, 2019 000-16335
10-K Open Document | Data Open Filing FORM 10-K Mar 28, 2019 Dec 31, 2018 000-16335
10-Q Open Document | Data Open Filing FORM 10-Q Oct 30, 2018 Sep 30, 2018 000-16335
10-Q Open Document | Data Open Filing FORM 10-Q Jul 31, 2018 Jun 30, 2018 000-16335
10-Q Open Document | Data Open Filing FORM 10-Q May 10, 2018 Mar 31, 2018 000-16335
10-K Open Document | Data Open Filing FORM 10-K Mar 30, 2018 Dec 31, 2017 000-16335
8-K Open Document Open Filing FORM 8-K Mar 7, 2018 Feb 27, 2018 000-16335
15-12G/A Open Document Open Filing 15-12G/A Feb 15, 2018 000-16335
15-12G Open Document Open Filing 15-12G Jan 10, 2018 000-16335
10-Q Open Document | Data Open Filing FORM 10-Q Nov 13, 2017 Sep 30, 2017 000-16335
10-Q Open Document | Data Open Filing FORM 10-Q Aug 14, 2017 Jun 30, 2017 000-16335
10-Q Open Document | Data Open Filing FORM 10-Q May 12, 2017 Mar 31, 2017 000-16335
10-K Open Document | Data Open Filing FORM 10-K Mar 31, 2017 Dec 31, 2016 000-16335
10-Q/A Open Document | Data Open Filing 10-Q/A Nov 17, 2016 Sep 30, 2016 000-16335
10-Q Open Document | Data Open Filing FORM 10-Q Nov 3, 2016 Sep 30, 2016 000-16335
10-Q Open Document | Data Open Filing FORM 10-Q Aug 19, 2016 Jun 30, 2016 000-16335
NT 10-Q Open Document Open Filing NOTIFICATION OF LATE FILING Aug 16, 2016 Jun 30, 2016 000-16335
10-Q Open Document | Data Open Filing 10-Q May 13, 2016 Mar 31, 2016 000-16335
10-K Open Document | Data Open Filing FORM 10-K Mar 30, 2016 Dec 31, 2015 000-16335
10-Q Open Document | Data Open Filing FORM 10-Q Nov 13, 2015 Sep 30, 2015 000-16335
10-Q Open Document | Data Open Filing 10-Q Aug 13, 2015 Jun 30, 2015 000-16335
8-K Open Document Open Filing FORM 8-K Jul 2, 2015 Jul 1, 2015 000-16335
8-K Open Document Open Filing FORM 8-K Jun 23, 2015 Jun 18, 2015 000-16335
10-Q Open Document | Data Open Filing FORM 10-Q May 12, 2015 Mar 31, 2015 000-16335
10-K Open Document | Data Open Filing 10-K Apr 14, 2015 Dec 31, 2014 000-16335
NT 10-K Open Document Open Filing NT 10-K Mar 31, 2015 Dec 31, 2014 000-16335
8-K Open Document Open Filing FORM 8-K Mar 5, 2015 Mar 1, 2015 000-16335
10-Q Open Document | Data Open Filing FORM 10-Q Nov 14, 2014 Sep 30, 2014 000-16335
10-Q Open Document | Data Open Filing 10-Q Aug 13, 2014 Jun 30, 2014 000-16335
10-Q Open Document | Data Open Filing 10-Q May 13, 2014 Mar 31, 2014 000-16335
8-K Open Document Open Filing FORM 8-K May 2, 2014 May 1, 2014 000-16335
10-K Open Document | Data Open Filing 10-K Mar 28, 2014 Dec 31, 2013 000-16335