Cero Therapeutics Holdings, Inc. SEC filings CERO
Cero Therapeutics Holdings, Inc. has 445 filings in SEC EDGAR's recent list, going back to Jul 8, 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 Oct 7, 2026 (material agreement). The company's fiscal year ends on December 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| 8-K |
Current report
Material agreement
|
Oct 7, 2026 | Oct 6, 2026 |
| 8-K |
Current report
Material agreement, Agreement ended, New debt, Unregistered share sale
|
Aug 31, 2026 | Aug 27, 2026 |
| 424B3 | Prospectus | Aug 14, 2026 | — |
| 10-Q | Quarterly report | Aug 14, 2026 | Jun 30, 2026 |
| 424B3 | Prospectus | Jul 17, 2026 | — |
| 8-K |
Current report
Material agreement, New debt, Unregistered share sale
|
Jul 17, 2026 | Jul 14, 2026 |
| 25-NSE | Delisting notice | Jul 13, 2026 | — |
| 424B3 | Prospectus | Jun 26, 2026 | — |
| 8-K |
Current report
Material agreement, New debt, Unregistered share sale
|
Jun 26, 2026 | Jun 23, 2026 |
| 424B3 | Prospectus | May 29, 2026 | — |
| 8-K |
Current report
Material agreement, New debt, Unregistered share sale
|
May 29, 2026 | May 28, 2026 |
| 424B3 | Prospectus | May 15, 2026 | — |
| 10-Q | Quarterly report | May 15, 2026 | Mar 31, 2026 |
| 424B3 | Prospectus | May 1, 2026 | — |
| 8-K |
Current report
Material agreement, New debt, Unregistered share sale
|
May 1, 2026 | Apr 27, 2026 |
| 424B3 | Prospectus | May 1, 2026 | — |
| 10-K/A | Amended annual report | Apr 30, 2026 | Dec 31, 2025 |
| 424B3 | Prospectus | Apr 15, 2026 | — |
| 10-K | Annual report | Apr 15, 2026 | Dec 31, 2025 |
| 424B3 | Prospectus | Apr 14, 2026 | — |
| 8-K |
Current report
Material agreement, New debt, Unregistered share sale
|
Apr 14, 2026 | Apr 8, 2026 |
| NT 10-K | Notification of late filing | Apr 1, 2026 | Dec 31, 2025 |
| 424B3 | Prospectus | Mar 11, 2026 | — |
| 8-K |
Current report
Material agreement, New debt, Unregistered share sale
|
Mar 11, 2026 | Mar 6, 2026 |
| 424B3 | Prospectus | Feb 20, 2026 | — |
| 8-K |
Current report
Material agreement, New debt, Unregistered share sale, Auditor change, Officer or director change
|
Feb 13, 2026 | Feb 9, 2026 |
| 424B3 | Prospectus | Feb 4, 2026 | — |
| 8-K |
Current report
Other events
|
Feb 4, 2026 | Feb 4, 2026 |
| 424B3 | Prospectus | Feb 3, 2026 | — |
| 8-K |
Current report
Listing notice
|
Feb 3, 2026 | Jan 29, 2026 |
| 424B3 | Prospectus | Jan 8, 2026 | — |
| 8-K |
Current report
Regulation FD disclosure, Other events
|
Jan 7, 2026 | Jan 7, 2026 |
| 424B3 | Prospectus | Dec 19, 2025 | — |
| 8-K |
Current report
Officer or director change, Shareholder vote results
|
Dec 19, 2025 | Dec 19, 2025 |
| EFFECT | Filing | Dec 11, 2025 | — |
| CORRESP | Letter to the SEC | Dec 9, 2025 | — |
| S-1 | Registration statement | Dec 5, 2025 | — |
| 424B3 | Prospectus | Dec 2, 2025 | — |
| 424B3 | Prospectus | Dec 2, 2025 | — |
| DEFA14A | Additional proxy material | Dec 2, 2025 | — |
| 8-K |
Current report
Material agreement
|
Dec 2, 2025 | Nov 26, 2025 |
| DEF 14A | Proxy statement | Nov 28, 2025 | Dec 19, 2025 |
| 424B3 | Prospectus | Nov 20, 2025 | — |
| 424B3 | Prospectus | Nov 20, 2025 | — |
| 10-Q | Quarterly report | Nov 19, 2025 | Sep 30, 2025 |
| NT 10-Q | Notification of late filing | Nov 17, 2025 | Sep 30, 2025 |
| PRE 14A | Preliminary proxy statement | Nov 17, 2025 | Nov 14, 2025 |
| 424B3 | Prospectus | Oct 30, 2025 | — |
| 424B3 | Prospectus | Oct 30, 2025 | — |
| 8-K |
Current report
Listing notice, Other events
|
Oct 30, 2025 | Oct 29, 2025 |
| 424B3 | Prospectus | Oct 23, 2025 | — |
| 424B3 | Prospectus | Oct 23, 2025 | — |
| 8-K |
Current report
Material agreement, Bylaw or fiscal year change, Other events
|
Oct 16, 2025 | Oct 14, 2025 |
| 8-K |
Current report
Material agreement, Unregistered share sale
|
Oct 14, 2025 | Oct 14, 2025 |
| 8-K |
Current report
Regulation FD disclosure
|
Sep 22, 2025 | Sep 22, 2025 |
| 424B3 | Prospectus | Sep 5, 2025 | — |
| 424B3 | Prospectus | Sep 5, 2025 | — |
| 8-K |
Current report
Other events
|
Sep 5, 2025 | Sep 5, 2025 |
| 424B3 | Prospectus | Sep 4, 2025 | — |
| 424B3 | Prospectus | Sep 4, 2025 | — |
| 8-K |
Current report
Listing notice
|
Sep 4, 2025 | Aug 28, 2025 |
| 424B3 | Prospectus | Aug 22, 2025 | — |
| 424B3 | Prospectus | Aug 22, 2025 | — |
| 10-Q | Quarterly report | Aug 22, 2025 | Jun 30, 2025 |
| EFFECT | Filing | Aug 15, 2025 | — |
| NT 10-Q | Notification of late filing | Aug 15, 2025 | Jun 30, 2025 |
| CORRESP | Letter to the SEC | Aug 14, 2025 | — |
| UPLOAD | Letter from the SEC | Aug 14, 2025 | — |
| S-3 | Shelf registration | Aug 11, 2025 | — |
| EFFECT | Filing | Jul 29, 2025 | — |
| S-8 | Employee stock plan registration | Jul 28, 2025 | — |
| CORRESP | Letter to the SEC | Jul 28, 2025 | — |
| 424B3 | Prospectus | Jul 25, 2025 | — |
| UPLOAD | Letter from the SEC | Jul 25, 2025 | — |
| S-1 | Registration statement | Jul 21, 2025 | — |
| 8-K |
Current report
Unregistered share sale
|
Jul 18, 2025 | Jul 18, 2025 |
| 424B3 | Prospectus | Jul 14, 2025 | — |
| 8-K |
Current report
Material agreement
|
Jul 14, 2025 | Jul 11, 2025 |
| 8-K |
Current report
Other events
|
Jul 8, 2025 | Jul 7, 2025 |
| 424B3 | Prospectus | Jul 2, 2025 | — |
| 8-K |
Current report
Material agreement, Unregistered share sale
|
Jun 30, 2025 | Jun 25, 2025 |
| 424B3 | Prospectus | Jun 25, 2025 | — |
| 8-K |
Current report
Other events
|
Jun 17, 2025 | Jun 17, 2025 |
| 424B3 | Prospectus | Jun 16, 2025 | — |
| 8-K |
Current report
Listing notice
|
Jun 13, 2025 | Jun 11, 2025 |
| 8-K |
Current report
Bylaw or fiscal year change, Other events
|
Jun 11, 2025 | Jun 11, 2025 |
| 424B3 | Prospectus | Jun 6, 2025 | — |
| 8-K |
Current report
Unregistered share sale, Other events
|
Jun 6, 2025 | Jun 5, 2025 |
| 8-K |
Current report
Officer or director change
|
Jun 2, 2025 | May 30, 2025 |
| EFFECT | Filing | May 29, 2025 | — |
| 8-K |
Current report
Officer or director change, Shareholder vote results
|
May 29, 2025 | May 29, 2025 |
| POS AM | Post-effective amendment no. 1 to form s-1 | May 27, 2025 | — |
| 10-Q | Quarterly report | May 15, 2025 | Mar 31, 2025 |
| 8-K |
Current report
Other events
|
May 8, 2025 | May 7, 2025 |
| UPLOAD | Letter from the SEC | May 7, 2025 | — |
| ARS | Annual report to shareholders | May 7, 2025 | Dec 31, 2024 |
| DEF 14A | Proxy statement | May 7, 2025 | May 29, 2025 |
| D | Filing | May 6, 2025 | — |
| CORRESP | Letter to the SEC | May 2, 2025 | — |
| PRER14A | Proxy statement | May 2, 2025 | — |
| UPLOAD | Letter from the SEC | May 1, 2025 | — |
| 10-K/A | Amended annual report | Apr 28, 2025 | Dec 31, 2024 |
| PRE 14A | Preliminary proxy statement | Apr 25, 2025 | Apr 25, 2025 |
| 8-K |
Current report
Bylaw or fiscal year change, Regulation FD disclosure
|
Apr 25, 2025 | Apr 22, 2025 |
| 8-K |
Current report
Material agreement, Unregistered share sale, Other events
|
Apr 22, 2025 | Apr 21, 2025 |
| 10-K | Annual report | Apr 15, 2025 | Dec 31, 2024 |
| NT 10-K | Filing | Apr 1, 2025 | Dec 31, 2024 |
| 424B3 | Prospectus | Feb 13, 2025 | — |
| 424B3 | Prospectus | Feb 13, 2025 | — |
| 424B3 | Prospectus | Feb 13, 2025 | — |
| 424B3 | Prospectus | Feb 13, 2025 | — |
| 8-K |
Current report
Other events
|
Feb 12, 2025 | Feb 12, 2025 |
| 424B3 | Prospectus | Feb 7, 2025 | — |
| 8-K |
Current report
Material agreement, Other events
|
Feb 6, 2025 | Feb 5, 2025 |
| EFFECT | Filing | Feb 5, 2025 | — |
| CORRESP | Letter to the SEC | Feb 5, 2025 | — |
| S-1/A | Amended registration statement | Feb 5, 2025 | — |
| CORRESP | Letter to the SEC | Feb 3, 2025 | — |
| CORRESP | Letter to the SEC | Jan 31, 2025 | — |
| CORRESP | Letter to the SEC | Jan 28, 2025 | — |
| CORRESP | Letter to the SEC | Jan 27, 2025 | — |
| UPLOAD | Letter from the SEC | Jan 23, 2025 | — |
| 424B3 | Prospectus | Jan 23, 2025 | — |
| 424B3 | Prospectus | Jan 23, 2025 | — |
| 424B3 | Prospectus | Jan 23, 2025 | — |
| 424B3 | Prospectus | Jan 23, 2025 | — |
| 8-K |
Current report
Other events
|
Jan 21, 2025 | Jan 17, 2025 |
| S-1/A | Amended registration statement | Jan 21, 2025 | — |
| 424B3 | Prospectus | Jan 14, 2025 | — |
| 424B3 | Prospectus | Jan 14, 2025 | — |
| 424B3 | Prospectus | Jan 14, 2025 | — |
| 424B3 | Prospectus | Jan 14, 2025 | — |
| 8-K |
Current report
Unregistered share sale
|
Jan 10, 2025 | Jan 6, 2025 |
| 424B3 | Prospectus | Jan 7, 2025 | — |
| 424B3 | Prospectus | Jan 7, 2025 | — |
| 424B3 | Prospectus | Jan 7, 2025 | — |
| 424B3 | Prospectus | Jan 7, 2025 | — |
| 8-K |
Current report
Other events
|
Jan 7, 2025 | Jan 7, 2025 |
| 8-K |
Current report
Bylaw or fiscal year change, Other events
|
Jan 6, 2025 | Jan 6, 2025 |
| 424B3 | Prospectus | Jan 3, 2025 | — |
| 424B3 | Prospectus | Jan 3, 2025 | — |
| 424B3 | Prospectus | Jan 3, 2025 | — |
| 8-K |
Current report
Unregistered share sale, Other events
|
Dec 31, 2024 | Dec 23, 2024 |
| UPLOAD | Letter from the SEC | Dec 26, 2024 | — |
| S-1 | Registration statement | Dec 23, 2024 | — |
| S-8 | Employee stock plan registration | Dec 9, 2024 | — |
| 8-K |
Current report
Officer or director change, Other events
|
Dec 6, 2024 | Dec 2, 2024 |
| EFFECT | Filing | Dec 5, 2024 | — |
| EFFECT | Filing | Dec 5, 2024 | — |
| 424B3 | Prospectus | Dec 5, 2024 | — |
| 424B3 | Prospectus | Dec 5, 2024 | — |
| CORRESP | Letter to the SEC | Dec 4, 2024 | — |
| CORRESP | Letter to the SEC | Dec 4, 2024 | — |
| UPLOAD | Letter from the SEC | Dec 4, 2024 | — |
| S-1 | Registration statement | Nov 27, 2024 | — |
| CORRESP | Letter to the SEC | Nov 25, 2024 | — |
| S-1/A | Amended registration statement | Nov 25, 2024 | — |
| 424B3 | Prospectus | Nov 20, 2024 | — |
| 424B3 | Prospectus | Nov 20, 2024 | — |
| 10-Q/A | Amended quarterly report | Nov 20, 2024 | Sep 30, 2024 |
| 10-Q | Quarterly report | Nov 19, 2024 | Sep 30, 2024 |
| 424B3 | Prospectus | Nov 19, 2024 | — |
| 424B3 | Prospectus | Nov 19, 2024 | — |
| 8-K |
Current report
Other events
|
Nov 18, 2024 | Nov 15, 2024 |
| NT 10-Q | Notification of late filing | Nov 14, 2024 | Sep 30, 2024 |
| 424B3 | Prospectus | Nov 12, 2024 | — |
| 424B3 | Prospectus | Nov 12, 2024 | — |
| 8-K |
Current report
Material agreement, Shareholder vote results
|
Nov 12, 2024 | Nov 8, 2024 |
| UPLOAD | Letter from the SEC | Nov 4, 2024 | — |
| 424B3 | Prospectus | Nov 1, 2024 | — |
| 424B3 | Prospectus | Nov 1, 2024 | — |
| 8-K |
Current report
Listing notice
|
Nov 1, 2024 | Oct 30, 2024 |
| DEFA14A | Additional proxy material | Oct 25, 2024 | — |
| 8-K |
Current report
Listing notice
|
Oct 25, 2024 | Oct 24, 2024 |
| S-1/A | Amended registration statement | Oct 22, 2024 | — |
| S-1 | Registration statement | Oct 21, 2024 | — |
| 424B3 | Prospectus | Oct 21, 2024 | — |
| 424B3 | Prospectus | Oct 21, 2024 | — |
| 8-K |
Current report
Other events
|
Oct 21, 2024 | Oct 21, 2024 |
| DEFR14A | Proxy statement | Oct 18, 2024 | — |
| DEF 14A | Proxy statement | Oct 15, 2024 | Nov 4, 2024 |
| 424B3 | Prospectus | Oct 11, 2024 | — |
| 424B3 | Prospectus | Oct 11, 2024 | — |
| 8-K |
Current report
Results of operations, Officer or director change, Regulation FD disclosure
|
Oct 11, 2024 | Oct 9, 2024 |
| 424B3 | Prospectus | Oct 4, 2024 | — |
| 424B3 | Prospectus | Oct 4, 2024 | — |
| D | Filing | Oct 4, 2024 | — |
| PRE 14A | Preliminary proxy statement | Oct 2, 2024 | Oct 2, 2024 |
| 8-K |
Current report
Officer or director change, Other events
|
Oct 2, 2024 | Sep 26, 2024 |
| 8-K |
Current report
Bylaw or fiscal year change, Other events
|
Oct 2, 2024 | Sep 25, 2024 |
| 424B3 | Prospectus | Sep 26, 2024 | — |
| 8-K |
Current report
Other events
|
Sep 26, 2024 | Sep 25, 2024 |
| 424B3 | Prospectus | Sep 26, 2024 | — |
| 8-K |
Current report
Material agreement, Unregistered share sale, Officer or director change, Other events
|
Sep 25, 2024 | Sep 22, 2024 |
| 8-K |
Current report
Officer or director change
|
Sep 23, 2024 | Sep 17, 2024 |
| DEFA14A | Additional proxy material | Sep 18, 2024 | — |
| 8-K |
Current report
Other events
|
Sep 18, 2024 | Sep 18, 2024 |
| DEFA14A | Additional proxy material | Sep 10, 2024 | — |
| 8-K |
Current report
Other events
|
Sep 10, 2024 | Sep 10, 2024 |
| DEF 14A | Proxy statement | Aug 26, 2024 | Sep 12, 2024 |
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Company profile
- Industry
- Biological Products, (No Diagnostic Substances) (SIC 2836)
- Listed as
- CERO (OTC), CEROW (OTC)
- Fiscal year ends
- December 31
- Incorporated in
- DE
- Headquarters
- South San Francisco, CA
- SEC filer status
- , Emerging growth company
- SEC CIK
- 1870404
- Former names
- CERO THERAPEUTICS HOLDINGS, INC. (until Oct 7, 2026); PHOENIX BIOTECH ACQUISITION CORP. (until Feb 14, 2024)
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Source: SEC EDGAR filings. This is company-reported data, not investment advice.