Abpro Holdings, Inc. SEC filings ABPWW
Abpro Holdings, Inc. has 253 filings in SEC EDGAR's recent list, going back to Dec 2, 2021. Its latest annual report, Form 10-K, was filed on Apr 15, 2026 for the period ended Dec 31, 2025. The latest quarterly report (Form 10-Q) was filed on Aug 14, 2026, covering the quarter ended Jun 30, 2026. The most recent current report (Form 8-K) was filed on Sep 1, 2026 (officer or director change). The company's fiscal year ends on December 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| 25-NSE | Delisting notice | Sep 30, 2026 | — |
| 8-K |
Current report
Officer or director change
|
Sep 1, 2026 | Aug 25, 2026 |
| 8-K |
Current report
Officer or director change
|
Aug 25, 2026 | Aug 19, 2026 |
| 10-Q | Quarterly report | Aug 14, 2026 | Jun 30, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Aug 11, 2026 | — |
| 8-K |
Current report
Listing notice
|
Jun 4, 2026 | May 28, 2026 |
| 10-Q | Quarterly report | May 20, 2026 | Mar 31, 2026 |
| NT 10-Q | Notification of late filing | May 15, 2026 | Mar 31, 2026 |
| 10-K/A | Amended annual report | May 1, 2026 | Dec 31, 2025 |
| 10-K | Annual report | Apr 15, 2026 | Dec 31, 2025 |
| NT 10-K | Notification of late filing | Mar 31, 2026 | Dec 31, 2025 |
| 8-K |
Current report
Listing notice
|
Feb 20, 2026 | Feb 18, 2026 |
| 8-K |
Current report
Listing notice, Officer or director change
|
Feb 11, 2026 | Feb 5, 2026 |
| SCHEDULE 13G | Ownership over 5% (passive) | Feb 9, 2026 | — |
| 8-K |
Current report
Officer or director change
|
Feb 3, 2026 | Jan 28, 2026 |
| 8-K |
Current report
Material agreement, New debt, Officer or director change
|
Jan 23, 2026 | Jan 16, 2026 |
| 8-K |
Current report
Regulation FD disclosure
|
Jan 6, 2026 | Jan 6, 2026 |
| 8-K |
Current report
Regulation FD disclosure
|
Dec 15, 2025 | Dec 15, 2025 |
| 8-K |
Current report
Regulation FD disclosure
|
Dec 9, 2025 | Dec 9, 2025 |
| EFFECT | Filing | Dec 2, 2025 | — |
| CORRESP | Letter to the SEC | Dec 2, 2025 | — |
| S-1/A | Amended registration statement | Nov 28, 2025 | — |
| 424B3 | Prospectus | Nov 17, 2025 | — |
| 10-Q | Quarterly report | Nov 14, 2025 | Sep 30, 2025 |
| S-1 | Registration statement | Nov 7, 2025 | — |
| 8-K/A |
Amended current report
Regulation FD disclosure
|
Nov 4, 2025 | Nov 4, 2025 |
| 8-K |
Current report
Regulation FD disclosure
|
Nov 4, 2025 | Nov 4, 2025 |
| 8-K |
Current report
Regulation FD disclosure
|
Nov 3, 2025 | Nov 3, 2025 |
| 8-K |
Current report
Bylaw or fiscal year change
|
Oct 22, 2025 | Oct 16, 2025 |
| 8-K |
Current report
Listing notice
|
Oct 17, 2025 | Oct 14, 2025 |
| 8-K |
Current report
Shareholder vote results
|
Oct 14, 2025 | Oct 10, 2025 |
| DEFA14A | Additional proxy material | Oct 6, 2025 | — |
| 8-K |
Current report
Listing notice
|
Oct 3, 2025 | Sep 30, 2025 |
| 8-K |
Current report
Officer or director change
|
Oct 2, 2025 | Sep 30, 2025 |
| DEFA14A | Additional proxy material | Sep 18, 2025 | — |
| DEFA14A | Additional proxy material | Sep 16, 2025 | — |
| DEF 14A | Proxy statement | Sep 8, 2025 | Sep 18, 2025 |
| PRE 14A | Preliminary proxy statement | Aug 29, 2025 | Aug 29, 2025 |
| 424B3 | Prospectus | Aug 13, 2025 | — |
| 10-Q | Quarterly report | Aug 13, 2025 | Jun 30, 2025 |
| 4 | Insider transaction | Aug 7, 2025 | Jul 25, 2025 |
| 4 | Insider transaction | Aug 4, 2025 | Jul 31, 2025 |
| 4 | Insider transaction | Jul 29, 2025 | Jul 25, 2025 |
| 4 | Insider transaction | Jul 29, 2025 | Jul 25, 2025 |
| 8-K |
Current report
Officer or director change
|
Jul 24, 2025 | Jul 20, 2025 |
| S-8 | Employee stock plan registration | Jun 18, 2025 | — |
| 8-K |
Current report
Regulation FD disclosure
|
Jun 17, 2025 | Jun 17, 2025 |
| EFFECT | Filing | Jun 12, 2025 | — |
| 424B3 | Prospectus | Jun 12, 2025 | — |
| CORRESP | Letter to the SEC | Jun 10, 2025 | — |
| S-1/A | Amended registration statement | Jun 6, 2025 | — |
| CORRESP | Letter to the SEC | Jun 6, 2025 | — |
| UPLOAD | Letter from the SEC | May 30, 2025 | — |
| S-1 | Registration statement | May 22, 2025 | — |
| 4 | Insider transaction | May 19, 2025 | May 19, 2025 |
| 424B3 | Prospectus | May 15, 2025 | — |
| 10-Q | Quarterly report | May 15, 2025 | Mar 31, 2025 |
| EFFECT | Filing | May 5, 2025 | — |
| POS AM | Post-effective amendment no. 1 to form s-1 | May 1, 2025 | — |
| 4 | Insider transaction | May 1, 2025 | Apr 29, 2025 |
| ARS | Annual report to shareholders | Apr 30, 2025 | Dec 31, 2024 |
| DEF 14A | Proxy statement | Apr 29, 2025 | May 20, 2025 |
| 8-K |
Current report
Regulation FD disclosure
|
Apr 28, 2025 | Apr 27, 2025 |
| 4 | Insider transaction | Apr 25, 2025 | Apr 23, 2025 |
| 8-K |
Current report
Material agreement, New debt
|
Apr 24, 2025 | Apr 20, 2025 |
| POS EX | Post-effective amendment no. 1 to form s-1 | Apr 23, 2025 | — |
| 424B3 | Prospectus | Apr 23, 2025 | — |
| 8-K |
Current report
Listing notice
|
Apr 16, 2025 | Apr 10, 2025 |
| 10-K | Annual report | Apr 15, 2025 | Dec 31, 2024 |
| 8-K |
Current report
Restatement
|
Apr 15, 2025 | Apr 12, 2025 |
| 8-K |
Current report
Shareholder vote results
|
Apr 8, 2025 | Apr 8, 2025 |
| 8-K |
Current report
Listing notice
|
Apr 8, 2025 | Apr 2, 2025 |
| NT 10-K | Notification of late filing | Apr 1, 2025 | Dec 31, 2024 |
| 8-K |
Current report
Regulation FD disclosure
|
Mar 26, 2025 | Mar 25, 2025 |
| DEF 14A | Proxy statement | Mar 24, 2025 | Apr 8, 2025 |
| PRE 14A | Preliminary proxy statement | Mar 13, 2025 | Mar 13, 2025 |
| 8-K |
Current report
Officer or director change
|
Mar 7, 2025 | Mar 3, 2025 |
| 8-K |
Current report
Change to shareholder rights
|
Mar 6, 2025 | Mar 5, 2025 |
| 8-K |
Current report
Regulation FD disclosure
|
Feb 21, 2025 | Feb 21, 2025 |
| EFFECT | Filing | Feb 12, 2025 | — |
| 424B3 | Prospectus | Feb 12, 2025 | — |
| CORRESP | Letter to the SEC | Feb 10, 2025 | — |
| S-1/A | Amended registration statement | Feb 7, 2025 | — |
| CORRESP | Letter to the SEC | Feb 7, 2025 | — |
| UPLOAD | Letter from the SEC | Jan 3, 2025 | — |
| S-1 | Registration statement | Dec 23, 2024 | — |
| 8-K |
Current report
Regulation FD disclosure
|
Dec 12, 2024 | Dec 12, 2024 |
| 8-K |
Current report
Auditor change
|
Dec 10, 2024 | Dec 9, 2024 |
| 8-K |
Current report
Officer or director change
|
Nov 29, 2024 | Nov 21, 2024 |
| 8-K |
Current report
Material agreement, Acquisition or sale of assets, New debt, Unregistered share sale, Change to shareholder rights, Change in control, Officer or director change, Bylaw or fiscal year change
|
Nov 26, 2024 | Nov 12, 2024 |
| 10-Q | Quarterly report | Nov 26, 2024 | Sep 30, 2024 |
| 4/A | Primary document | Nov 25, 2024 | Nov 13, 2024 |
| 4 | Insider transaction | Nov 25, 2024 | Nov 13, 2024 |
| 3 | Initial insider ownership | Nov 25, 2024 | Nov 13, 2024 |
| 3 | Initial insider ownership | Nov 18, 2024 | Nov 13, 2024 |
| 3 | Initial insider ownership | Nov 18, 2024 | Nov 13, 2024 |
| 4 | Insider transaction | Nov 15, 2024 | Nov 13, 2024 |
| 4 | Insider transaction | Nov 15, 2024 | Nov 13, 2024 |
| 3 | Initial insider ownership | Nov 15, 2024 | Nov 13, 2024 |
| 3 | Initial insider ownership | Nov 15, 2024 | Nov 13, 2024 |
| 3 | Initial insider ownership | Nov 15, 2024 | Nov 13, 2024 |
| NT 10-Q | Notification of late filing | Nov 15, 2024 | Sep 30, 2024 |
| 8-K |
Current report
Regulation FD disclosure
|
Nov 13, 2024 | Nov 13, 2024 |
| 25-NSE | Delisting notice | Nov 12, 2024 | — |
| 425 | Filing | Nov 8, 2024 | — |
| 8-K |
Current report
Other events
|
Nov 8, 2024 | Nov 8, 2024 |
| 425 | Filing | Nov 8, 2024 | — |
| 8-K |
Current report
Material agreement, Other events
|
Nov 8, 2024 | Nov 7, 2024 |
| 425 | Filing | Nov 8, 2024 | — |
| 8-K |
Current report
Shareholder vote results
|
Nov 8, 2024 | Nov 7, 2024 |
| 425 | Filing | Nov 6, 2024 | — |
| 8-K |
Current report
Material agreement
|
Nov 6, 2024 | Nov 5, 2024 |
| 425 | Filing | Nov 4, 2024 | — |
| 8-K |
Current report
Material agreement, New debt, Unregistered share sale
|
Nov 4, 2024 | Oct 30, 2024 |
| SEC STAFF LETTER | Filing | Oct 24, 2024 | — |
| 425 | Filing | Oct 21, 2024 | — |
| 8-K |
Current report
Listing notice, Other events
|
Oct 21, 2024 | Oct 16, 2024 |
| EFFECT | Filing | Oct 18, 2024 | — |
| 424B3 | Prospectus | Oct 18, 2024 | — |
| S-4/A | Filing | Oct 17, 2024 | — |
| CORRESP | Letter to the SEC | Oct 16, 2024 | — |
| 425 | Filing | Oct 15, 2024 | — |
| 8-K |
Current report
Regulation FD disclosure
|
Oct 15, 2024 | Oct 15, 2024 |
| CORRESP | Letter to the SEC | Oct 9, 2024 | — |
| S-4/A | Filing | Oct 9, 2024 | — |
| 8-K |
Current report
Bylaw or fiscal year change, Shareholder vote results
|
Sep 20, 2024 | Sep 19, 2024 |
| UPLOAD | Letter from the SEC | Sep 19, 2024 | — |
| DEFA14A | Additional proxy material | Sep 16, 2024 | — |
| DEFA14A | Additional proxy material | Sep 13, 2024 | — |
| DEFA14A | Additional proxy material | Sep 10, 2024 | — |
| S-4/A | Filing | Sep 6, 2024 | — |
| UPLOAD | Letter from the SEC | Sep 5, 2024 | — |
| 425 | Filing | Sep 4, 2024 | — |
| 8-K |
Current report
Material agreement, Unregistered share sale, Regulation FD disclosure
|
Sep 4, 2024 | Sep 4, 2024 |
| DEF 14A | Proxy statement | Sep 4, 2024 | Sep 16, 2024 |
| CORRESP | Letter to the SEC | Sep 3, 2024 | — |
| UPLOAD | Letter from the SEC | Aug 30, 2024 | — |
| 425 | Filing | Aug 29, 2024 | — |
| 8-K |
Current report
Material agreement, Unregistered share sale, Regulation FD disclosure
|
Aug 28, 2024 | Aug 22, 2024 |
| 10-Q | Quarterly report | Aug 23, 2024 | Jun 30, 2024 |
| PRE 14A | Preliminary proxy statement | Aug 20, 2024 | Sep 16, 2024 |
| 8-K |
Current report
Other events
|
Aug 19, 2024 | Aug 16, 2024 |
| NT 10-Q | Filing | Aug 14, 2024 | Jun 30, 2024 |
| 8-K |
Current report
Listing notice
|
Aug 6, 2024 | Jul 31, 2024 |
| 8-K |
Current report
Other events
|
Jul 19, 2024 | Jul 18, 2024 |
| 10-Q | Quarterly report | Jul 9, 2024 | Mar 31, 2024 |
| 8-K |
Current report
Other events
|
Jun 18, 2024 | Jun 14, 2024 |
| 8-K |
Current report
Listing notice
|
Jun 7, 2024 | Jun 3, 2024 |
| 425 | Filing | May 31, 2024 | — |
| 8-K |
Current report
Material agreement
|
May 31, 2024 | May 30, 2024 |
| 8-K |
Current report
Other events
|
May 17, 2024 | May 16, 2024 |
| NT 10-Q | Filing | May 15, 2024 | Mar 31, 2024 |
| SEC STAFF LETTER | Filing | May 10, 2024 | — |
| CORRESP | Letter to the SEC | Apr 30, 2024 | — |
| S-4/A | Filing | Apr 30, 2024 | — |
| 425 | Filing | Apr 23, 2024 | — |
| 8-K |
Current report
Listing notice, Other events
|
Apr 23, 2024 | Apr 18, 2024 |
| UPLOAD | Letter from the SEC | Apr 17, 2024 | — |
| 8-K |
Current report
Material agreement, New debt, Unregistered share sale
|
Apr 16, 2024 | Apr 10, 2024 |
| 425 | Filing | Apr 3, 2024 | — |
| 8-K |
Current report
Regulation FD disclosure
|
Apr 3, 2024 | Apr 2, 2024 |
| CORRESP | Letter to the SEC | Apr 2, 2024 | — |
| S-4/A | Filing | Apr 2, 2024 | — |
| 10-K/A | Amended annual report | Apr 1, 2024 | Dec 31, 2023 |
| 10-K | Annual report | Mar 29, 2024 | Dec 31, 2023 |
| 8-K |
Current report
Other events
|
Mar 19, 2024 | Mar 15, 2024 |
| 425 | Filing | Mar 13, 2024 | — |
| UPLOAD | Letter from the SEC | Feb 15, 2024 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 7, 2024 | — |
| 425 | Filing | Jan 22, 2024 | — |
| 8-K |
Current report
Regulation FD disclosure
|
Jan 22, 2024 | Jan 22, 2024 |
| S-4 | Registration for a merger or exchange | Jan 19, 2024 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Jan 19, 2024 | — |
| 425 | Filing | Jan 19, 2024 | — |
| 8-K |
Current report
Material agreement
|
Jan 19, 2024 | Jan 18, 2024 |
| 8-K |
Current report
Bylaw or fiscal year change, Shareholder vote results
|
Dec 18, 2023 | Dec 15, 2023 |
| 10-Q | Quarterly report | Dec 15, 2023 | Sep 30, 2023 |
| 8-K |
Current report
Other events
|
Dec 14, 2023 | Dec 14, 2023 |
| DEFA14A | Additional proxy material | Dec 14, 2023 | — |
| DEFA14A | Additional proxy material | Dec 12, 2023 | — |
| 425 | Filing | Dec 12, 2023 | — |
| 8-K |
Current report
Material agreement, Regulation FD disclosure
|
Dec 12, 2023 | Dec 11, 2023 |
| UPLOAD | Letter from the SEC | Dec 5, 2023 | — |
| CORRESP | Letter to the SEC | Dec 1, 2023 | — |
| DEF 14A | Proxy statement | Dec 1, 2023 | Dec 15, 2023 |
| NT 10-Q | Filing | Nov 14, 2023 | Sep 30, 2023 |
| 3 | Initial insider ownership | Nov 8, 2023 | Nov 7, 2023 |
| 4 | Insider transaction | Nov 8, 2023 | Nov 6, 2023 |
| 4 | Insider transaction | Nov 8, 2023 | Nov 6, 2023 |
| 8-K |
Current report
Officer or director change
|
Nov 7, 2023 | Nov 6, 2023 |
| PRE 14A | Preliminary proxy statement | Nov 3, 2023 | Dec 5, 2023 |
| 8-K |
Current report
Material agreement, New debt, Other events
|
Oct 18, 2023 | Oct 14, 2023 |
| 425 | Filing | Sep 21, 2023 | — |
| 8-K |
Current report
Other events
|
Sep 21, 2023 | Sep 18, 2023 |
| 10-Q | Quarterly report | Aug 22, 2023 | Jun 30, 2023 |
| NT 10-Q | Filing | Aug 14, 2023 | Jun 30, 2023 |
| 10-Q | Quarterly report | May 22, 2023 | Mar 31, 2023 |
| NT 10-Q | Filing | May 15, 2023 | Mar 31, 2023 |
| SC 13D | Ownership over 5% (active) | Apr 20, 2023 | — |
| 4 | Insider transaction | Apr 19, 2023 | Apr 18, 2023 |
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
- Biological Products, (No Diagnostic Substances) (SIC 2836)
- Listed as
- ABPO (OTC), ABPWW (OTC)
- Fiscal year ends
- December 31
- Incorporated in
- DE
- Headquarters
- New York, NY
- SEC filer status
- Non-accelerated filer, Smaller reporting company, Emerging growth company
- SEC CIK
- 1893219
- Former names
- Atlantic Coastal Acquisition Corp. II (until Nov 12, 2024)
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All 182 Biological Products, (No Diagnostic Substances) companies
Source: SEC EDGAR filings. This is company-reported data, not investment advice.