AmBase Corp — All Filings
449 total filings on record
Public companies registered with the SEC are required to file periodic reports, disclosures, and notices throughout the year. The most important are the 10-K (annual report), 10-Q (quarterly report), and 8-K (material event notice). Use the filters below to narrow by form type.
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| Form | Description | Accession Number | Filed | Period |
|---|---|---|---|---|
| 8-K | 8-K | 0001140361-26-007783 | Mar 4, 2026 | Mar 2, 2026 |
| 8-K | 8-K | 0001140361-26-006772 | Feb 25, 2026 | Feb 24, 2026 |
| 8-K | 8-K | 0001140361-26-002808 | Jan 29, 2026 | Jan 28, 2025 |
| 8-K | 8-K | 0001140361-26-001845 | Jan 21, 2026 | Jan 1, 2026 |
| 8-K | 8-K | 0001140361-25-046179 | Dec 19, 2025 | Dec 18, 2025 |
| 8-K | 8-K | 0001140361-25-043442 | Nov 26, 2025 | Nov 25, 2025 |
| 10-Q | 10-Q | 0001140361-25-040725 | Nov 6, 2025 | Sep 30, 2025 |
| 8-K | 8-K | 0001140361-25-036484 | Sep 29, 2025 | Sep 26, 2025 |
| 8-K | 8-K | 0001140361-25-034689 | Sep 11, 2025 | Sep 10, 2025 |
| 10-Q | QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(D) | 0001140361-25-030759 | Aug 13, 2025 | Jun 30, 2025 |
| 8-K | 8-K | 0001140361-25-027288 | Jul 25, 2025 | Jul 22, 2025 |
| 8-K | 8-K | 0001140361-25-023344 | Jun 23, 2025 | — |
| 8-K | 8-K | 0001140361-25-021930 | Jun 9, 2025 | Jun 6, 2025 |
| 8-K | 8-K | 0001140361-25-021117 | Jun 2, 2025 | May 27, 2025 |
| 10-Q | 10-Q | 0001140361-25-018623 | May 13, 2025 | Mar 31, 2025 |
| DEFA14A | DEFA14A | 0001140361-25-015166 | Apr 23, 2025 | — |
| 8-K | 8-K | 0001140361-25-014937 | Apr 22, 2025 | — |
| 8-K | 8-K | 0001140361-25-010698 | Mar 27, 2025 | Mar 26, 2025 |
| DEF 14A | DEF 14A | 0001140361-25-010232 | Mar 25, 2025 | Jun 6, 2025 |
| 10-K | 10-K | 0001140361-25-010025 | Mar 24, 2025 | Dec 31, 2024 |
| 8-K | 8-K | 0001140361-25-008585 | Mar 13, 2025 | Mar 10, 2025 |
| 8-K | 8-K | 0001140361-24-048490 | Dec 5, 2024 | Dec 4, 2024 |
| 10-Q | 10-Q | 0001140361-24-046383 | Nov 13, 2024 | Sep 30, 2024 |
| 8-K | 8-K | 0001140361-24-041709 | Sep 24, 2024 | Sep 23, 2024 |
| 8-K | 8-K | 0001140361-24-038071 | Aug 21, 2024 | Aug 19, 2024 |
| 10-Q | 10-Q | 0001140361-24-036570 | Aug 9, 2024 | Jun 30, 2024 |
| 8-K | 8-K | 0001140361-24-028954 | Jun 5, 2024 | Jun 4, 2024 |
| 10-Q | 10-Q | 0001140361-24-025152 | May 9, 2024 | Mar 31, 2024 |
| SC 13D/A | SC 13D/A | 0001140361-24-023798 | May 1, 2024 | — |
| 4 | FORM 4 | 0001140361-24-023797 | May 1, 2024 | Apr 30, 2024 |
| 4 | PRIMARY DOCUMENT | 0000020639-24-000001 | May 1, 2024 | Apr 29, 2024 |
| 8-K | 8-K | 0001140361-24-023639 | May 1, 2024 | Apr 29, 2024 |
| DEFA14A | DEFA14A | 0001140361-24-017656 | Apr 3, 2024 | — |
| DEF 14A | DEF 14A | 0001140361-24-017635 | Apr 3, 2024 | Jun 4, 2024 |
| SC 13D/A | SC 13D/A | 0001140361-24-017043 | Apr 1, 2024 | — |
| 8-K | 8-K | 0001140361-24-016976 | Apr 1, 2024 | — |
| SC 13D/A | — | 0001493152-24-011373 | Mar 26, 2024 | — |
| PRE 14A | PRE 14A | 0001140361-24-014754 | Mar 22, 2024 | Jun 4, 2024 |
| 10-K | 10-K | 0001140361-24-013921 | Mar 18, 2024 | Dec 31, 2023 |
| SC 13D/A | — | 0001493152-24-009863 | Mar 13, 2024 | — |
| 8-K | 8-K | 0001140361-24-012523 | Mar 11, 2024 | Mar 8, 2024 |
| SC 13D/A | SC 13D/A | 0001140361-24-012291 | Mar 8, 2024 | — |
| 4 | FORM 4 | 0001140361-24-011943 | Mar 7, 2024 | Feb 28, 2024 |
| 8-K | 8-K | 0001140361-24-010156 | Feb 28, 2024 | — |
| 8-K | 8-K | 0001140361-24-009767 | Feb 27, 2024 | Feb 26, 2024 |
| SC 13D/A | — | 0001493152-24-007747 | Feb 23, 2024 | — |
| 8-K | 8-K | 0001140361-24-009294 | Feb 23, 2024 | — |
| SC 13D/A | — | 0001493152-24-007272 | Feb 20, 2024 | — |
| 4 | — | 0001493152-24-007270 | Feb 20, 2024 | Feb 15, 2024 |
| 8-K | 8-K | 0001140361-24-006465 | Feb 8, 2024 | Feb 5, 2024 |