AmBase Corp SEC filings ABCP
AmBase Corp has 457 filings in SEC EDGAR's recent list, going back to Feb 12, 1996. Its latest annual report, Form 10-K, was filed on Mar 30, 2026 for the period ended Dec 31, 2025. The latest quarterly report (Form 10-Q) was filed on Oct 28, 2026, covering the quarter ended Sep 30, 2026. The most recent current report (Form 8-K) was filed on Oct 13, 2026 (material agreement). The company's fiscal year ends on December 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| 10-Q | Quarterly report | Oct 28, 2026 | Sep 30, 2026 |
| 8-K |
Current report
Material agreement
|
Oct 13, 2026 | Oct 13, 2026 |
| 10-Q | Quarterly report | Aug 12, 2026 | Jun 30, 2026 |
| 8-K |
Current report
Material agreement
|
Jul 31, 2026 | Jul 30, 2026 |
| 8-K |
Current report
Shareholder vote results
|
May 29, 2026 | May 27, 2026 |
| 10-Q | Quarterly report | May 11, 2026 | Mar 31, 2026 |
| DEF 14A | Proxy statement | Mar 31, 2026 | May 27, 2026 |
| 10-K | Annual report | Mar 30, 2026 | Dec 31, 2025 |
| 8-K |
Current report
Material agreement
|
Mar 4, 2026 | Mar 2, 2026 |
| 8-K |
Current report
Material agreement
|
Feb 25, 2026 | Feb 24, 2026 |
| 8-K |
Current report
Material agreement
|
Jan 29, 2026 | Jan 28, 2025 |
| 8-K |
Current report
Officer or director change
|
Jan 21, 2026 | Jan 1, 2026 |
| 8-K |
Current report
Material agreement
|
Dec 19, 2025 | Dec 18, 2025 |
| 8-K |
Current report
Material agreement
|
Nov 26, 2025 | Nov 25, 2025 |
| 10-Q | Quarterly report | Nov 6, 2025 | Sep 30, 2025 |
| 8-K |
Current report
Material agreement
|
Sep 29, 2025 | Sep 26, 2025 |
| 8-K |
Current report
Material agreement
|
Sep 11, 2025 | Sep 10, 2025 |
| 10-Q | Quarterly report | Aug 13, 2025 | Jun 30, 2025 |
| 8-K |
Current report
Material agreement
|
Jul 25, 2025 | Jul 22, 2025 |
| 8-K |
Current report
Material agreement
|
Jun 23, 2025 | Jun 23, 2025 |
| 8-K |
Current report
Shareholder vote results
|
Jun 9, 2025 | Jun 6, 2025 |
| 8-K |
Current report
Material agreement
|
Jun 2, 2025 | May 27, 2025 |
| 10-Q | Quarterly report | May 13, 2025 | Mar 31, 2025 |
| DEFA14A | Additional proxy material | Apr 23, 2025 | — |
| 8-K |
Current report
Auditor change
|
Apr 22, 2025 | Apr 22, 2025 |
| 8-K |
Current report
Material agreement
|
Mar 27, 2025 | Mar 26, 2025 |
| DEF 14A | Proxy statement | Mar 25, 2025 | Jun 6, 2025 |
| 10-K | Annual report | Mar 24, 2025 | Dec 31, 2024 |
| 8-K |
Current report
Material agreement
|
Mar 13, 2025 | Mar 10, 2025 |
| 8-K |
Current report
Material agreement
|
Dec 5, 2024 | Dec 4, 2024 |
| 10-Q | Quarterly report | Nov 13, 2024 | Sep 30, 2024 |
| 8-K |
Current report
Material agreement
|
Sep 24, 2024 | Sep 23, 2024 |
| 8-K |
Current report
Material agreement
|
Aug 21, 2024 | Aug 19, 2024 |
| 10-Q | Quarterly report | Aug 9, 2024 | Jun 30, 2024 |
| 8-K |
Current report
Shareholder vote results
|
Jun 5, 2024 | Jun 4, 2024 |
| 10-Q | Quarterly report | May 9, 2024 | Mar 31, 2024 |
| SC 13D/A | Amended ownership over 5% (active) | May 1, 2024 | — |
| 4 | Insider transaction | May 1, 2024 | Apr 30, 2024 |
| 4 | Insider transaction | May 1, 2024 | Apr 29, 2024 |
| 8-K |
Current report
Officer or director change
|
May 1, 2024 | Apr 29, 2024 |
| DEFA14A | Additional proxy material | Apr 3, 2024 | — |
| DEF 14A | Proxy statement | Apr 3, 2024 | Jun 4, 2024 |
| SC 13D/A | Amended ownership over 5% (active) | Apr 1, 2024 | — |
| 8-K |
Current report
Unregistered share sale
|
Apr 1, 2024 | Apr 1, 2024 |
| SC 13D/A | Amended ownership over 5% (active) | Mar 26, 2024 | — |
| PRE 14A | Preliminary proxy statement | Mar 22, 2024 | Jun 4, 2024 |
| 10-K | Annual report | Mar 18, 2024 | Dec 31, 2023 |
| SC 13D/A | Amended ownership over 5% (active) | Mar 13, 2024 | — |
| 8-K |
Current report
Material agreement
|
Mar 11, 2024 | Mar 8, 2024 |
| SC 13D/A | Amended ownership over 5% (active) | Mar 8, 2024 | — |
| 4 | Insider transaction | Mar 7, 2024 | Feb 28, 2024 |
| 8-K |
Current report
Material agreement, Unregistered share sale
|
Feb 28, 2024 | Feb 28, 2024 |
| 8-K |
Current report
Material agreement
|
Feb 27, 2024 | Feb 26, 2024 |
| SC 13D/A | Amended ownership over 5% (active) | Feb 23, 2024 | — |
| 8-K |
Current report
Material agreement, Unregistered share sale
|
Feb 23, 2024 | Feb 23, 2024 |
| SC 13D/A | Amended ownership over 5% (active) | Feb 20, 2024 | — |
| 4 | Insider transaction | Feb 20, 2024 | Feb 15, 2024 |
| 8-K |
Current report
Material agreement
|
Feb 8, 2024 | Feb 5, 2024 |
| 8-K |
Current report
Material agreement
|
Jan 26, 2024 | Jan 26, 2024 |
| 8-K |
Current report
Material agreement
|
Dec 28, 2023 | Dec 27, 2023 |
| 8-K |
Current report
Material agreement
|
Nov 28, 2023 | Nov 27, 2023 |
| 10-Q | Quarterly report | Nov 9, 2023 | Sep 30, 2023 |
| 4 | Insider transaction | Oct 11, 2023 | Oct 9, 2023 |
| 8-K |
Current report
Material agreement
|
Oct 10, 2023 | Oct 6, 2023 |
| 4 | Insider transaction | Sep 26, 2023 | Sep 22, 2023 |
| 4 | Insider transaction | Sep 12, 2023 | Sep 8, 2023 |
| SC 13D/A | Amended ownership over 5% (active) | Aug 29, 2023 | — |
| 4 | Insider transaction | Aug 29, 2023 | Aug 25, 2023 |
| 8-K |
Current report
Material agreement
|
Aug 15, 2023 | Aug 15, 2023 |
| 4 | Insider transaction | Aug 3, 2023 | Aug 1, 2023 |
| 10-Q | Quarterly report | Aug 1, 2023 | Jun 30, 2023 |
| 8-K |
Current report
Material agreement
|
Jul 20, 2023 | Jul 19, 2023 |
| 4 | Insider transaction | Jun 29, 2023 | Jun 27, 2023 |
| 8-K |
Current report
Material agreement
|
Jun 26, 2023 | Jun 22, 2023 |
| 4 | Insider transaction | Jun 14, 2023 | Jun 12, 2023 |
| 4 | Insider transaction | Jun 9, 2023 | Jun 7, 2023 |
| 8-K |
Current report
Shareholder vote results
|
Jun 2, 2023 | Jun 1, 2023 |
| 4 | Insider transaction | Jun 2, 2023 | Jun 1, 2023 |
| SC 13D/A | Amended ownership over 5% (active) | May 31, 2023 | — |
| 4 | Insider transaction | May 30, 2023 | May 26, 2023 |
| 4 | Insider transaction | May 26, 2023 | May 8, 2023 |
| 8-K |
Current report
Material agreement
|
May 11, 2023 | May 10, 2023 |
| 4 | Insider transaction | May 10, 2023 | May 8, 2023 |
| 10-Q | Quarterly report | May 2, 2023 | Mar 31, 2023 |
| 8-K |
Current report
Material agreement
|
Apr 10, 2023 | Apr 6, 2023 |
| DEF 14A | Proxy statement | Mar 30, 2023 | Mar 31, 2023 |
| 10-K | Annual report | Mar 28, 2023 | Dec 31, 2022 |
| 8-K |
Current report
Material agreement
|
Feb 9, 2023 | Feb 9, 2023 |
| 4 | Insider transaction | Jan 30, 2023 | Jan 27, 2023 |
| 3 | Initial insider ownership | Jan 20, 2023 | Jan 20, 2023 |
| 8-K |
Current report
Material agreement, Officer or director change, Other events
|
Jan 20, 2023 | Jan 20, 2023 |
| 4 | Insider transaction | Dec 29, 2022 | Dec 27, 2022 |
| 4 | Insider transaction | Dec 27, 2022 | Dec 23, 2022 |
| 10-Q | Quarterly report | Nov 3, 2022 | Sep 30, 2022 |
| 10-Q | Quarterly report | Aug 5, 2022 | Jun 30, 2022 |
| 8-K |
Current report
Shareholder vote results
|
Jun 3, 2022 | Jun 2, 2022 |
| 10-Q | Quarterly report | May 5, 2022 | Mar 31, 2022 |
| 4 | Insider transaction | Apr 12, 2022 | Apr 11, 2022 |
| DEF 14A | Proxy statement | Mar 29, 2022 | Jun 2, 2022 |
| 10-K | Annual report | Mar 25, 2022 | Dec 31, 2021 |
| 5 | Annual insider ownership | Feb 9, 2022 | Dec 31, 2021 |
| 10-Q | Quarterly report | Nov 9, 2021 | Sep 30, 2021 |
| 10-Q | Quarterly report | Aug 10, 2021 | Jun 30, 2021 |
| 8-K |
Current report
Shareholder vote results
|
Jun 4, 2021 | Jun 4, 2021 |
| 10-Q | Quarterly report | May 11, 2021 | Mar 31, 2021 |
| DEF 14A | Proxy statement | Mar 26, 2021 | Dec 31, 2020 |
| 10-K | Annual report | Mar 24, 2021 | Dec 31, 2020 |
| SC 13D/A | Amended ownership over 5% (active) | Feb 5, 2021 | — |
| 4 | Insider transaction | Jan 5, 2021 | Jan 5, 2021 |
| 10-Q | Quarterly report | Nov 10, 2020 | Sep 30, 2020 |
| 10-Q | Quarterly report | Aug 10, 2020 | Jun 30, 2020 |
| 8-K |
Current report
Shareholder vote results
|
Jun 4, 2020 | Jun 4, 2020 |
| 4 | Insider transaction | May 22, 2020 | May 20, 2020 |
| 4 | Insider transaction | May 22, 2020 | May 20, 2020 |
| DEFA14A | Additional proxy material | May 19, 2020 | — |
| 10-Q | Quarterly report | May 7, 2020 | Mar 31, 2020 |
| DEF 14A | Proxy statement | Mar 25, 2020 | Dec 31, 2019 |
| 10-K | Annual report | Mar 25, 2020 | Dec 31, 2019 |
| 8-K |
Current report
Other events
|
Jan 15, 2020 | Jan 15, 2020 |
| 3 | Initial insider ownership | Jan 9, 2020 | Dec 31, 2019 |
| SC 13D/A | Amended ownership over 5% (active) | Jan 8, 2020 | — |
| SC 13D | Ownership over 5% (active) | Jan 7, 2020 | — |
| 4 | Insider transaction | Jan 2, 2020 | Dec 30, 2019 |
| 10-Q | Quarterly report | Nov 12, 2019 | Sep 30, 2019 |
| 10-Q | Quarterly report | Aug 12, 2019 | Jun 30, 2019 |
| 8-K |
Current report
Shareholder vote results
|
Jun 7, 2019 | Jun 7, 2019 |
| 4 | Insider transaction | Jun 5, 2019 | Jun 3, 2019 |
| 8-K |
Current report
Material agreement
|
May 21, 2019 | May 21, 2019 |
| 10-Q | Quarterly report | May 13, 2019 | Mar 31, 2019 |
| DEF 14A | Proxy statement | Mar 27, 2019 | Mar 26, 2019 |
| 10-K | Annual report | Mar 27, 2019 | Dec 31, 2018 |
| 8-K |
Current report
Other events
|
Mar 4, 2019 | Mar 4, 2019 |
| 8-K |
Current report
Other events
|
Jan 18, 2019 | Jan 18, 2019 |
| 10-Q | Quarterly report | Nov 9, 2018 | Sep 30, 2018 |
| SC 13D/A | Amended ownership over 5% (active) | Oct 17, 2018 | — |
| SC 13D/A | Amended ownership over 5% (active) | Sep 21, 2018 | — |
| 4 | Insider transaction | Sep 20, 2018 | Sep 18, 2018 |
| 4/A | Form 4/a | Sep 20, 2018 | Sep 7, 2018 |
| 4/A | Form 4/a | Sep 20, 2018 | Apr 30, 2018 |
| 8-K |
Current report
Other events
|
Sep 14, 2018 | Sep 14, 2018 |
| 4 | Insider transaction | Sep 11, 2018 | Sep 7, 2018 |
| 10-Q | Quarterly report | Aug 13, 2018 | Jun 30, 2018 |
| 8-K |
Current report
Shareholder vote results
|
Jun 8, 2018 | Jun 8, 2018 |
| 10-Q | Quarterly report | May 14, 2018 | Mar 31, 2018 |
| 4/A | Form 4/a | May 3, 2018 | Apr 30, 2018 |
| 4 | Insider transaction | May 2, 2018 | Apr 30, 2018 |
| 10-K/A | Amended annual report | Apr 30, 2018 | Apr 30, 2018 |
| DEF 14A | Proxy statement | Apr 4, 2018 | Apr 4, 2018 |
| 10-K | Annual report | Mar 30, 2018 | Dec 31, 2017 |
| 8-K |
Current report
Other events
|
Mar 8, 2018 | Mar 6, 2018 |
| SC 13D/A | Amended ownership over 5% (active) | Feb 21, 2018 | — |
| 8-K |
Current report
Acquisition or sale of assets, Other events
|
Jan 31, 2018 | Jan 31, 2018 |
| 8-K |
Current report
Material agreement
|
Jan 22, 2018 | Jan 22, 2018 |
| 4 | Insider transaction | Dec 26, 2017 | Dec 21, 2017 |
| 4 | Insider transaction | Dec 6, 2017 | Dec 4, 2017 |
| 4 | Insider transaction | Nov 29, 2017 | Nov 27, 2017 |
| 4 | Insider transaction | Nov 14, 2017 | Oct 11, 2017 |
| SC 13D | Ownership over 5% (active) | Nov 14, 2017 | — |
| 10-Q | Quarterly report | Nov 14, 2017 | Sep 30, 2017 |
| 8-K |
Current report
Other events
|
Sep 26, 2017 | Sep 26, 2017 |
| 8-K |
Current report
Other events
|
Aug 30, 2017 | Aug 30, 2017 |
| 8-K |
Current report
Other events
|
Aug 15, 2017 | Aug 15, 2017 |
| 10-Q | Quarterly report | Aug 11, 2017 | Jun 30, 2017 |
| 8-K |
Current report
Other events
|
Aug 2, 2017 | Aug 2, 2017 |
| 8-K |
Current report
Other events
|
Jul 19, 2017 | Jul 19, 2017 |
| 8-K |
Current report
Other events
|
Jun 29, 2017 | Jun 29, 2017 |
| 8-K |
Current report
Shareholder vote results
|
Jun 1, 2017 | Jun 1, 2017 |
| 10-Q | Quarterly report | May 11, 2017 | Mar 31, 2017 |
| DEF 14A | Proxy statement | Mar 31, 2017 | Mar 31, 2017 |
| 10-K | Annual report | Mar 30, 2017 | Dec 31, 2016 |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 14, 2017 | — |
| 4 | Insider transaction | Dec 12, 2016 | Dec 9, 2016 |
| 4 | Insider transaction | Dec 8, 2016 | Dec 7, 2016 |
| 10-Q | Quarterly report | Nov 8, 2016 | Sep 30, 2016 |
| 10-Q | Quarterly report | Aug 11, 2016 | Jun 30, 2016 |
| 3 | Initial insider ownership | Jun 30, 2016 | Jun 30, 2016 |
| 3 | Initial insider ownership | Jun 30, 2016 | Jun 30, 2016 |
| 8-K |
Current report
Officer or director change
|
Jun 30, 2016 | Jun 30, 2016 |
| 8-K |
Current report
Shareholder vote results
|
Jun 7, 2016 | Jun 7, 2016 |
| 10-Q | Quarterly report | May 12, 2016 | Mar 31, 2016 |
| 8-K |
Current report
Other events
|
May 2, 2016 | May 2, 2016 |
| DEF 14A | Proxy statement | Apr 11, 2016 | Apr 11, 2016 |
| PRE 14A | Preliminary proxy statement | Mar 31, 2016 | Mar 31, 2016 |
| 10-K | Annual report | Mar 29, 2016 | Dec 31, 2015 |
| 4 | Insider transaction | Mar 2, 2016 | Feb 29, 2016 |
| 4 | Insider transaction | Feb 26, 2016 | Feb 24, 2016 |
| 4 | Insider transaction | Feb 19, 2016 | Feb 17, 2016 |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 16, 2016 | — |
| 4 | Insider transaction | Jan 15, 2016 | Jan 13, 2016 |
| 4 | Insider transaction | Dec 28, 2015 | Dec 23, 2015 |
| 4 | Insider transaction | Dec 8, 2015 | Dec 4, 2015 |
| 4/A | Form 4/a | Nov 20, 2015 | Nov 13, 2015 |
| 4 | Insider transaction | Nov 17, 2015 | Nov 13, 2015 |
| 4 | Insider transaction | Nov 12, 2015 | Nov 9, 2015 |
| 10-Q | Quarterly report | Nov 10, 2015 | Sep 30, 2015 |
| 4 | Insider transaction | Sep 30, 2015 | Sep 28, 2015 |
| 4 | Insider transaction | Aug 28, 2015 | Aug 26, 2015 |
| 4 | Insider transaction | Aug 18, 2015 | Aug 14, 2015 |
| 10-Q | Quarterly report | Aug 12, 2015 | Jun 30, 2015 |
| 4 | Insider transaction | Aug 12, 2015 | Aug 10, 2015 |
Showing 200 filings, the most recent 200. Main filings leave out insider and ownership forms such as Form 4; choose a type above to see them. Each form opens on SEC.gov. Older filings are on SEC EDGAR.
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Company profile
- Industry
- Opeators of Nonresidential Buildings (SIC 6512)
- Listed as
- ABCP (OTC)
- Fiscal year ends
- December 31
- Headquarters
- Coral Springs, FL
- SEC filer status
- Non-accelerated filer, Smaller reporting company
- SEC CIK
- 20639
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Source: SEC EDGAR filings. This is company-reported data, not investment advice.