System1, Inc. SEC filings SST
System1, Inc. has 615 filings in SEC EDGAR's recent list, going back to Mar 23, 2020. Its latest annual report, Form 10-K, was filed on Mar 11, 2026 for the period ended Dec 31, 2025. The latest quarterly report (Form 10-Q) was filed on Aug 5, 2026, covering the quarter ended Jun 30, 2026. The most recent current report (Form 8-K) was filed on Oct 30, 2026 (officer or director change). The company's fiscal year ends on December 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| 8-K |
Current report
Officer or director change
|
Oct 30, 2026 | Oct 30, 2026 |
| EFFECT | Filing | Aug 6, 2026 | — |
| 8-K |
Current report
Regulation FD disclosure
|
Aug 5, 2026 | Aug 5, 2026 |
| 10-Q | Quarterly report | Aug 5, 2026 | Jun 30, 2026 |
| 8-K |
Current report
Results of operations
|
Aug 5, 2026 | Aug 5, 2026 |
| S-3 | Shelf registration | Aug 4, 2026 | — |
| 8-K |
Current report
Change to shareholder rights, Officer or director change, Bylaw or fiscal year change, Shareholder vote results, Other events
|
Jul 24, 2026 | Jul 22, 2026 |
| DRS | Filing | Jul 15, 2026 | — |
| S-8 | Employee stock plan registration | Jun 25, 2026 | — |
| DEF 14A | Proxy statement | Jun 22, 2026 | Jul 22, 2026 |
| PRE 14A | Preliminary proxy statement | Jun 11, 2026 | Jun 10, 2026 |
| 8-K |
Current report
Material agreement, New debt, Unregistered share sale, Regulation FD disclosure
|
Jun 1, 2026 | May 29, 2026 |
| 8-K |
Current report
Regulation FD disclosure
|
May 12, 2026 | May 12, 2026 |
| 10-Q | Quarterly report | May 12, 2026 | Mar 31, 2026 |
| 8-K |
Current report
Results of operations
|
May 12, 2026 | May 12, 2026 |
| 10-K/A | Amended annual report | Apr 30, 2026 | Dec 31, 2025 |
| 8-K |
Current report
Regulation FD disclosure
|
Mar 11, 2026 | Mar 11, 2026 |
| 10-K | Annual report | Mar 11, 2026 | Dec 31, 2025 |
| 8-K |
Current report
Results of operations
|
Mar 11, 2026 | Mar 11, 2026 |
| 8-K |
Current report
Officer or director change
|
Jan 9, 2026 | Jan 9, 2026 |
| 8-K |
Current report
Listing notice, Regulation FD disclosure
|
Dec 12, 2025 | Dec 8, 2025 |
| 8-K |
Current report
Officer or director change, Other events
|
Dec 3, 2025 | Dec 1, 2025 |
| 8-K |
Current report
Regulation FD disclosure
|
Nov 5, 2025 | Nov 5, 2025 |
| 10-Q | Quarterly report | Nov 5, 2025 | Sep 30, 2025 |
| 8-K |
Current report
Results of operations
|
Nov 5, 2025 | Nov 5, 2025 |
| 8-K |
Current report
Regulation FD disclosure
|
Aug 7, 2025 | Aug 7, 2025 |
| 10-Q | Quarterly report | Aug 7, 2025 | Jun 30, 2025 |
| 8-K |
Current report
Results of operations
|
Aug 7, 2025 | Aug 7, 2025 |
| EFFECT | Filing | Jul 8, 2025 | — |
| CORRESP | Letter to the SEC | Jul 3, 2025 | — |
| UPLOAD | Letter from the SEC | Jul 3, 2025 | — |
| S-8 | Employee stock plan registration | Jun 27, 2025 | — |
| S-3 | Shelf registration | Jun 27, 2025 | — |
| 8-K |
Current report
Change to shareholder rights, Bylaw or fiscal year change, Other events
|
Jun 11, 2025 | Jun 11, 2025 |
| 8-K |
Current report
Officer or director change, Shareholder vote results, Other events
|
Jun 10, 2025 | Jun 10, 2025 |
| 8-K |
Current report
Officer or director change
|
May 23, 2025 | May 22, 2025 |
| DEF 14A | Proxy statement | May 19, 2025 | Jun 10, 2025 |
| PRE 14A | Preliminary proxy statement | May 8, 2025 | Jun 10, 2025 |
| 8-K |
Current report
Regulation FD disclosure
|
May 6, 2025 | May 6, 2025 |
| 10-Q | Quarterly report | May 6, 2025 | Mar 31, 2025 |
| 8-K |
Current report
Results of operations
|
May 6, 2025 | May 6, 2025 |
| 8-K |
Current report
Unregistered share sale
|
Apr 29, 2025 | Apr 28, 2025 |
| 10-K/A | Amended annual report | Apr 25, 2025 | Dec 31, 2024 |
| S-8 | Employee stock plan registration | Apr 23, 2025 | — |
| 25-NSE | Delisting notice | Apr 22, 2025 | — |
| 8-K |
Current report
Officer or director change
|
Apr 18, 2025 | Apr 15, 2025 |
| 8-K |
Current report
Listing notice
|
Apr 7, 2025 | Apr 7, 2025 |
| 8-K |
Current report
Results of operations
|
Mar 10, 2025 | Mar 10, 2025 |
| 10-K | Annual report | Mar 10, 2025 | Dec 31, 2024 |
| 8-K |
Current report
Results of operations
|
Mar 10, 2025 | Mar 10, 2025 |
| 8-K |
Current report
Listing notice, Regulation FD disclosure
|
Jan 10, 2025 | Jan 6, 2025 |
| UPLOAD | Letter from the SEC | Dec 3, 2024 | — |
| CORRESP | Letter to the SEC | Nov 7, 2024 | — |
| 8-K |
Current report
Results of operations
|
Nov 7, 2024 | Nov 7, 2024 |
| 10-Q | Quarterly report | Nov 7, 2024 | Sep 30, 2024 |
| 8-K |
Current report
Results of operations
|
Nov 7, 2024 | Nov 7, 2024 |
| UPLOAD | Letter from the SEC | Nov 4, 2024 | — |
| 10-K/A | Amended annual report | Sep 27, 2024 | Dec 31, 2023 |
| CORRESP | Letter to the SEC | Sep 27, 2024 | — |
| UPLOAD | Letter from the SEC | Sep 20, 2024 | — |
| 8-K |
Current report
Regulation FD disclosure
|
Aug 8, 2024 | Aug 8, 2024 |
| 10-Q | Quarterly report | Aug 8, 2024 | Jun 30, 2024 |
| 8-K |
Current report
Results of operations
|
Aug 8, 2024 | Aug 8, 2024 |
| S-8 | Employee stock plan registration | Jun 20, 2024 | — |
| 8-K |
Current report
Change to shareholder rights, Officer or director change, Bylaw or fiscal year change, Shareholder vote results
|
Jun 14, 2024 | Jun 11, 2024 |
| EFFECT | Filing | Jun 10, 2024 | — |
| 424B3 | Prospectus | Jun 10, 2024 | — |
| 8-K |
Current report
Auditor change, Other events
|
Jun 7, 2024 | Jun 4, 2024 |
| POS AM | Filing | Jun 3, 2024 | — |
| DEFA14A | Additional proxy material | May 31, 2024 | — |
| PRER14A | Filing | May 21, 2024 | — |
| DEFA14A | Additional proxy material | May 20, 2024 | — |
| 424B3 | Prospectus | May 10, 2024 | — |
| 424B3 | Prospectus | May 10, 2024 | — |
| 424B3 | Prospectus | May 10, 2024 | — |
| 8-K |
Current report
Regulation FD disclosure
|
May 9, 2024 | May 9, 2024 |
| 10-Q | Quarterly report | May 9, 2024 | Mar 31, 2024 |
| 8-K |
Current report
Results of operations
|
May 9, 2024 | May 9, 2024 |
| DEF 14A | Proxy statement | Apr 29, 2024 | Jun 11, 2024 |
| 8-K |
Current report
Officer or director change
|
Apr 26, 2024 | Apr 23, 2024 |
| EFFECT | Filing | Apr 12, 2024 | — |
| 8-K |
Current report
Officer or director change
|
Apr 12, 2024 | Apr 10, 2024 |
| CORRESP | Letter to the SEC | Apr 9, 2024 | — |
| UPLOAD | Letter from the SEC | Apr 5, 2024 | — |
| POS AM | Filing | Mar 29, 2024 | — |
| 8-K |
Current report
Regulation FD disclosure
|
Mar 18, 2024 | Mar 18, 2024 |
| 8-K |
Current report
Results of operations
|
Mar 18, 2024 | Mar 18, 2024 |
| 10-K | Annual report | Mar 15, 2024 | Dec 31, 2023 |
| 8-K |
Current report
Officer or director change
|
Feb 23, 2024 | Feb 20, 2024 |
| 8-K |
Current report
Regulation FD disclosure
|
Jan 17, 2024 | Jan 17, 2024 |
| 8-K |
Current report
Regulation FD disclosure
|
Jan 3, 2024 | Jan 3, 2024 |
| S-8 | Employee stock plan registration | Dec 14, 2023 | — |
| 8-K |
Current report
Regulation FD disclosure
|
Dec 4, 2023 | Dec 4, 2023 |
| 8-K |
Current report
Material agreement, Acquisition or sale of assets, Officer or director change, Regulation FD disclosure
|
Dec 4, 2023 | Nov 30, 2023 |
| 10-Q | Quarterly report | Nov 9, 2023 | Sep 30, 2023 |
| 8-K |
Current report
Material agreement, New debt
|
Oct 12, 2023 | Oct 6, 2023 |
| 8-K |
Current report
Material agreement, New debt
|
Sep 12, 2023 | Sep 6, 2023 |
| 8-K |
Current report
Regulation FD disclosure
|
Sep 6, 2023 | Sep 6, 2023 |
| 8-K |
Current report
Officer or director change
|
Aug 17, 2023 | Aug 15, 2023 |
| 10-Q | Quarterly report | Aug 9, 2023 | Jun 30, 2023 |
| 8-K |
Current report
Regulation FD disclosure
|
Aug 9, 2023 | Aug 9, 2023 |
| 8-K |
Current report
Results of operations
|
Aug 9, 2023 | Aug 9, 2023 |
| 8-K |
Current report
Officer or director change
|
Aug 7, 2023 | Aug 1, 2023 |
| 8-K |
Current report
Regulation FD disclosure
|
Jul 3, 2023 | Jul 3, 2023 |
| 8-K |
Current report
Results of operations
|
Jul 3, 2023 | Jul 3, 2023 |
| 10-Q | Quarterly report | Jul 3, 2023 | Mar 31, 2023 |
| 8-K |
Current report
Officer or director change, Shareholder vote results
|
Jun 22, 2023 | Jun 15, 2023 |
| DEFA14A | Additional proxy material | Jun 8, 2023 | — |
| DEF 14A | Proxy statement | Jun 7, 2023 | Dec 31, 2022 |
| 8-K |
Current report
Results of operations
|
Jun 6, 2023 | Jun 6, 2023 |
| 10-K | Annual report | Jun 6, 2023 | Dec 31, 2022 |
| 10-Q/A | Amended quarterly report | Jun 6, 2023 | Sep 30, 2022 |
| 10-Q/A | Amended quarterly report | Jun 6, 2023 | Jun 30, 2022 |
| 10-Q/A | Amended quarterly report | Jun 6, 2023 | Mar 31, 2022 |
| NT 10-Q | Filing | May 10, 2023 | Mar 31, 2023 |
| 8-K |
Current report
Material agreement, New debt
|
Apr 12, 2023 | Apr 10, 2023 |
| 8-K |
Current report
Listing notice, Regulation FD disclosure
|
Apr 6, 2023 | Apr 6, 2023 |
| 424B3 | Prospectus | Mar 21, 2023 | — |
| 8-K |
Current report
Officer or director change
|
Mar 21, 2023 | Mar 15, 2023 |
| 424B3 | Prospectus | Mar 17, 2023 | — |
| NT 10-K/A | Filing | Mar 17, 2023 | Dec 31, 2022 |
| 8-K |
Current report
Restatement
|
Mar 17, 2023 | Mar 15, 2023 |
| 424B3 | Prospectus | Mar 17, 2023 | — |
| 8-K |
Current report
Regulation FD disclosure
|
Mar 16, 2023 | Mar 16, 2023 |
| NT 10-K | Filing | Mar 16, 2023 | Dec 31, 2022 |
| 424B3 | Prospectus | Mar 1, 2023 | — |
| 8-K |
Current report
Bylaw or fiscal year change
|
Mar 1, 2023 | Feb 23, 2023 |
| UPLOAD | Letter from the SEC | Jan 31, 2023 | — |
| CORRESP | Letter to the SEC | Dec 16, 2022 | — |
| UPLOAD | Letter from the SEC | Dec 2, 2022 | — |
| 424B3 | Prospectus | Nov 14, 2022 | — |
| 10-Q | Quarterly report | Nov 14, 2022 | Sep 30, 2022 |
| 8-K |
Current report
Regulation FD disclosure
|
Nov 10, 2022 | Nov 10, 2022 |
| 8-K |
Current report
Regulation FD disclosure
|
Nov 10, 2022 | Nov 10, 2022 |
| 8-K |
Current report
Results of operations
|
Nov 10, 2022 | Nov 10, 2022 |
| 424B3 | Prospectus | Nov 3, 2022 | — |
| 8-K |
Current report
Officer or director change
|
Nov 2, 2022 | Nov 2, 2022 |
| CORRESP | Letter to the SEC | Sep 23, 2022 | — |
| 424B3 | Prospectus | Sep 15, 2022 | — |
| UPLOAD | Letter from the SEC | Sep 14, 2022 | — |
| 8-K |
Current report
Regulation FD disclosure
|
Sep 1, 2022 | Sep 1, 2022 |
| 424B3 | Prospectus | Aug 30, 2022 | — |
| 8-K |
Current report
Material agreement
|
Aug 30, 2022 | Aug 30, 2022 |
| CORRESP | Letter to the SEC | Aug 23, 2022 | — |
| 424B3 | Prospectus | Aug 16, 2022 | — |
| 8-K |
Current report
Regulation FD disclosure
|
Aug 15, 2022 | Aug 15, 2022 |
| 10-Q | Quarterly report | Aug 15, 2022 | Jun 30, 2022 |
| UPLOAD | Letter from the SEC | Aug 11, 2022 | — |
| 8-K |
Current report
Regulation FD disclosure
|
Aug 11, 2022 | Aug 11, 2022 |
| 8-K |
Current report
Results of operations
|
Aug 11, 2022 | Aug 11, 2022 |
| 424B3 | Prospectus | Aug 10, 2022 | — |
| 424B3 | Prospectus | Aug 10, 2022 | — |
| 8-K |
Current report
Material agreement, Bylaw or fiscal year change
|
Jul 8, 2022 | Jul 6, 2022 |
| 424B3 | Prospectus | May 19, 2022 | — |
| 8-K |
Current report
Regulation FD disclosure
|
May 19, 2022 | May 18, 2022 |
| 10-Q | Quarterly report | May 19, 2022 | Mar 31, 2022 |
| NT 10-Q | Filing | May 16, 2022 | Mar 31, 2022 |
| 8-K |
Current report
Results of operations
|
May 12, 2022 | May 12, 2022 |
| S-8 | Employee stock plan registration | Apr 27, 2022 | — |
| 424B5 | Prospectus supplement | Apr 19, 2022 | — |
| EFFECT | Filing | Apr 18, 2022 | — |
| 8-K |
Current report
Regulation FD disclosure
|
Apr 18, 2022 | Apr 18, 2022 |
| CORRESP | Letter to the SEC | Apr 15, 2022 | — |
| CORRESP | Letter to the SEC | Apr 13, 2022 | — |
| S-1/A | Amended registration statement | Apr 13, 2022 | — |
| UPLOAD | Letter from the SEC | Apr 12, 2022 | — |
| CORRESP | Letter to the SEC | Apr 8, 2022 | — |
| S-1/A | Amended registration statement | Apr 8, 2022 | — |
| UPLOAD | Letter from the SEC | Apr 6, 2022 | — |
| 8-K |
Current report
Results of operations
|
Apr 4, 2022 | Apr 4, 2022 |
| 8-K/A |
Amended current report
Acquisition or sale of assets, Auditor change
|
Apr 4, 2022 | Jan 27, 2022 |
| S-1/A | Amended registration statement | Apr 1, 2022 | — |
| 10-K | Annual report | Mar 31, 2022 | Dec 31, 2021 |
| 8-K |
Current report
Other events
|
Mar 4, 2022 | Mar 4, 2022 |
| 8-K |
Current report
Auditor change, Officer or director change
|
Mar 2, 2022 | Feb 24, 2022 |
| UPLOAD | Letter from the SEC | Feb 16, 2022 | — |
| 8-K |
Current report
Results of operations
|
Feb 15, 2022 | Feb 15, 2022 |
| S-1 | Registration statement | Feb 9, 2022 | — |
| 8-K/A |
Amended current report
Acquisition or sale of assets
|
Feb 9, 2022 | Jan 27, 2022 |
| 8-K/A |
Amended current report
Acquisition or sale of assets
|
Feb 3, 2022 | Jan 27, 2022 |
| 8-K |
Current report
Material agreement, Acquisition or sale of assets, Unregistered share sale, Change to shareholder rights, Change in control, Officer or director change, Bylaw or fiscal year change, Other events
|
Feb 2, 2022 | Jan 27, 2022 |
| 25-NSE | Delisting notice | Jan 28, 2022 | — |
| 8-A12B | Filing | Jan 27, 2022 | — |
| 8-K |
Current report
Other events
|
Jan 26, 2022 | Jan 25, 2022 |
| 8-K |
Current report
Shareholder vote results, Regulation FD disclosure
|
Jan 21, 2022 | Jan 20, 2022 |
| 425 | Filing | Jan 10, 2022 | — |
| 8-K |
Current report
Material agreement, Other events
|
Jan 10, 2022 | Jan 10, 2022 |
| 424B3 | Prospectus | Jan 10, 2022 | — |
| 425 | Filing | Jan 3, 2022 | — |
| 424B3 | Prospectus | Dec 23, 2021 | — |
| EFFECT | Filing | Dec 20, 2021 | — |
| CORRESP | Letter to the SEC | Dec 20, 2021 | — |
| CORRESP | Letter to the SEC | Dec 16, 2021 | — |
| S-4/A | Filing | Dec 16, 2021 | — |
| UPLOAD | Letter from the SEC | Dec 15, 2021 | — |
| 425 | Filing | Dec 9, 2021 | — |
| 425 | Filing | Dec 7, 2021 | — |
| CORRESP | Letter to the SEC | Dec 1, 2021 | — |
| S-4/A | Filing | Dec 1, 2021 | — |
| 10-K/A | Amended annual report | Dec 1, 2021 | Dec 31, 2020 |
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
- Services-Computer Programming, Data Processing, Etc. (SIC 7370)
- Listed as
- SST (NYSE), SSTPW (OTC)
- Fiscal year ends
- December 31
- Headquarters
- Marina Del Rey, CA
- SEC filer status
- Non-accelerated filer, Smaller reporting company
- SEC CIK
- 1805833
- Former names
- Trebia Acquisition Corp. (until Jan 26, 2022)
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Source: SEC EDGAR filings. This is company-reported data, not investment advice.