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 |
| 4 | Insider transaction | Jul 17, 2026 | Jul 15, 2026 |
| 4 | Insider transaction | Jul 17, 2026 | Jul 15, 2026 |
| 4 | Insider transaction | Jul 17, 2026 | Jul 15, 2026 |
| 4 | Insider transaction | Jul 17, 2026 | Jul 15, 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 |
| 4 | Insider transaction | Jun 2, 2026 | May 29, 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 |
| 4 | Insider transaction | Apr 17, 2026 | Apr 15, 2026 |
| 4 | Insider transaction | Apr 17, 2026 | Apr 15, 2026 |
| 4 | Insider transaction | Apr 17, 2026 | Apr 15, 2026 |
| 4 | Insider transaction | Apr 17, 2026 | Apr 15, 2026 |
| 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 |
| 4 | Insider transaction | Jan 29, 2026 | Jan 28, 2026 |
| 4 | Insider transaction | Jan 29, 2026 | Jan 28, 2026 |
| 4 | Insider transaction | Jan 29, 2026 | Jan 28, 2026 |
| 4 | Insider transaction | Jan 29, 2026 | Jan 28, 2026 |
| 4 | Insider transaction | Jan 16, 2026 | Jan 15, 2026 |
| 4 | Insider transaction | Jan 16, 2026 | Jan 15, 2026 |
| 4 | Insider transaction | Jan 16, 2026 | Jan 15, 2026 |
| 4 | Insider transaction | Jan 16, 2026 | Jan 15, 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 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Dec 2, 2025 | — |
| SCHEDULE 13D/A | Amended ownership over 5% (active) | Dec 2, 2025 | — |
| SCHEDULE 13D/A | Amended ownership over 5% (active) | Nov 12, 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 |
| 4 | Insider transaction | Oct 30, 2025 | Oct 28, 2025 |
| 4 | Insider transaction | Oct 30, 2025 | Oct 28, 2025 |
| 4 | Insider transaction | Oct 30, 2025 | Oct 28, 2025 |
| 4 | Insider transaction | Oct 30, 2025 | Oct 28, 2025 |
| 4 | Insider transaction | Oct 17, 2025 | Oct 15, 2025 |
| 4 | Insider transaction | Oct 17, 2025 | Oct 15, 2025 |
| 4 | Insider transaction | Oct 17, 2025 | Oct 15, 2025 |
| 4 | Insider transaction | Oct 17, 2025 | Oct 15, 2025 |
| 4 | Insider transaction | Aug 26, 2025 | Aug 22, 2025 |
| 4 | Insider transaction | Aug 21, 2025 | Aug 19, 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 |
| 4 | Insider transaction | Aug 5, 2025 | Jul 31, 2025 |
| 4 | Insider transaction | Aug 5, 2025 | Jul 31, 2025 |
| 4 | Insider transaction | Aug 4, 2025 | Jul 31, 2025 |
| 4 | Insider transaction | Aug 4, 2025 | Jul 31, 2025 |
| 4 | Insider transaction | Aug 4, 2025 | Jul 31, 2025 |
| 4 | Insider transaction | Aug 4, 2025 | Jul 31, 2025 |
| 4 | Insider transaction | Aug 4, 2025 | Jul 31, 2025 |
| 4 | Insider transaction | Jul 31, 2025 | Jul 29, 2025 |
| 4 | Insider transaction | Jul 30, 2025 | Jul 28, 2025 |
| 4 | Insider transaction | Jul 30, 2025 | Jul 28, 2025 |
| 4 | Insider transaction | Jul 30, 2025 | Jul 28, 2025 |
| 4 | Insider transaction | Jul 30, 2025 | Jul 28, 2025 |
| 4 | Insider transaction | Jul 17, 2025 | Jul 15, 2025 |
| 4 | Insider transaction | Jul 17, 2025 | Jul 15, 2025 |
| 4 | Insider transaction | Jul 17, 2025 | Jul 15, 2025 |
| 4 | Insider transaction | Jul 17, 2025 | Jul 15, 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 | — |
| 4 | Insider transaction | Jun 17, 2025 | Jun 13, 2025 |
| 4 | Insider transaction | Jun 13, 2025 | Jun 12, 2025 |
| 4 | Insider transaction | Jun 11, 2025 | Jun 9, 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 |
| SCHEDULE 13D | Ownership over 5% (active) | May 5, 2025 | — |
| 4 | Insider transaction | Apr 30, 2025 | Apr 28, 2025 |
| 4 | Insider transaction | Apr 30, 2025 | Apr 28, 2025 |
| 4 | Insider transaction | Apr 30, 2025 | Apr 28, 2025 |
| 4 | Insider transaction | Apr 30, 2025 | Apr 28, 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 |
| 4 | Insider transaction | Apr 17, 2025 | Apr 15, 2025 |
| 4 | Insider transaction | Apr 17, 2025 | Apr 15, 2025 |
| 4 | Insider transaction | Apr 17, 2025 | Apr 15, 2025 |
| 4 | Insider transaction | Apr 17, 2025 | Apr 15, 2025 |
| 8-K |
Current report
Listing notice
|
Apr 7, 2025 | Apr 7, 2025 |
| SCHEDULE 13D/A | Amended ownership over 5% (active) | Mar 25, 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 |
| 4 | Insider transaction | Jan 30, 2025 | Jan 28, 2025 |
| 4 | Insider transaction | Jan 30, 2025 | Jan 28, 2025 |
| 4 | Insider transaction | Jan 30, 2025 | Jan 28, 2025 |
| 4 | Insider transaction | Jan 30, 2025 | Jan 28, 2025 |
| 4 | Insider transaction | Jan 17, 2025 | Jan 15, 2025 |
| 4 | Insider transaction | Jan 17, 2025 | Jan 15, 2025 |
| 4 | Insider transaction | Jan 17, 2025 | Jan 15, 2025 |
| 4 | Insider transaction | Jan 17, 2025 | Jan 15, 2025 |
| 8-K |
Current report
Listing notice, Regulation FD disclosure
|
Jan 10, 2025 | Jan 6, 2025 |
| 4 | Insider transaction | Dec 27, 2024 | Dec 24, 2024 |
| 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 | — |
| 4 | Insider transaction | Oct 31, 2024 | Oct 28, 2024 |
| 4 | Insider transaction | Oct 31, 2024 | Oct 28, 2024 |
| 4 | Insider transaction | Oct 31, 2024 | Oct 28, 2024 |
| 4 | Insider transaction | Oct 31, 2024 | Oct 28, 2024 |
| 4 | Insider transaction | Oct 16, 2024 | Oct 15, 2024 |
| 4 | Insider transaction | Oct 16, 2024 | Oct 15, 2024 |
| 4 | Insider transaction | Oct 16, 2024 | Oct 15, 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 | — |
| 4 | Insider transaction | Sep 19, 2024 | Sep 16, 2024 |
| 4 | Insider transaction | Sep 12, 2024 | Sep 10, 2024 |
| 4 | Insider transaction | Sep 9, 2024 | Sep 5, 2024 |
| 4 | Insider transaction | Sep 4, 2024 | Aug 30, 2024 |
| 4 | Insider transaction | Aug 23, 2024 | Aug 21, 2024 |
| 4 | Insider transaction | Aug 20, 2024 | Aug 16, 2024 |
| 4 | Insider transaction | Aug 20, 2024 | Aug 15, 2024 |
| 4 | Insider transaction | Aug 15, 2024 | Aug 13, 2024 |
| 4 | Insider transaction | Aug 14, 2024 | Aug 12, 2024 |
| 4 | Insider transaction | Aug 14, 2024 | Aug 12, 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 |
| 4 | Insider transaction | Jul 31, 2024 | Jul 29, 2024 |
| 4 | Insider transaction | Jul 31, 2024 | Jul 29, 2024 |
| 4 | Insider transaction | Jul 31, 2024 | Jul 29, 2024 |
| 4 | Insider transaction | Jul 31, 2024 | Jul 29, 2024 |
| 4 | Insider transaction | Jul 31, 2024 | Jul 29, 2024 |
| 4 | Insider transaction | Jul 22, 2024 | Jul 18, 2024 |
| 4 | Insider transaction | Jul 22, 2024 | Jul 18, 2024 |
| 4 | Insider transaction | Jul 22, 2024 | Jul 18, 2024 |
| 4 | Insider transaction | Jul 22, 2024 | Jul 18, 2024 |
| 4 | Insider transaction | Jul 17, 2024 | Jul 15, 2024 |
| 4 | Insider transaction | Jul 17, 2024 | Jul 15, 2024 |
| 4 | Insider transaction | Jul 17, 2024 | Jul 15, 2024 |
| 4 | Insider transaction | Jul 11, 2024 | Jul 9, 2024 |
| 4 | Insider transaction | Jul 8, 2024 | Jul 3, 2024 |
| 4 | Insider transaction | Jul 3, 2024 | Jul 1, 2024 |
| 4 | Insider transaction | Jul 3, 2024 | Jul 1, 2024 |
| 4 | Insider transaction | Jul 3, 2024 | Jul 1, 2024 |
| 4 | Insider transaction | Jul 3, 2024 | Jul 1, 2024 |
| 4 | Insider transaction | Jul 3, 2024 | Jul 1, 2024 |
| 4 | Insider transaction | Jul 3, 2024 | Jul 1, 2024 |
| 4 | Insider transaction | Jul 2, 2024 | Jun 28, 2024 |
| 4 | Insider transaction | Jun 27, 2024 | Jun 25, 2024 |
| 4/A | Form 4/a | Jun 26, 2024 | Jun 17, 2024 |
| SC 13D/A | Amended ownership over 5% (active) | Jun 26, 2024 | — |
| SC 13D/A | Amended ownership over 5% (active) | Jun 25, 2024 | — |
| 4 | Insider transaction | Jun 24, 2024 | Jun 20, 2024 |
| 4 | Insider transaction | Jun 21, 2024 | Jun 17, 2024 |
| 4 | Insider transaction | Jun 21, 2024 | Jun 17, 2024 |
| 3 | Initial insider ownership | Jun 21, 2024 | Jun 17, 2024 |
| SC 13D | Ownership over 5% (active) | Jun 21, 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 |
| 4 | Insider transaction | Jun 13, 2024 | Jun 11, 2024 |
| 4 | Insider transaction | Jun 13, 2024 | Jun 11, 2024 |
| 4 | Insider transaction | Jun 13, 2024 | Jun 11, 2024 |
| 4 | Insider transaction | Jun 13, 2024 | Jun 11, 2024 |
| 4 | Insider transaction | Jun 13, 2024 | Jun 11, 2024 |
| 4 | Insider transaction | Jun 13, 2024 | Jun 11, 2024 |
| 4 | Insider transaction | Jun 13, 2024 | Jun 11, 2024 |
| 4 | Insider transaction | Jun 13, 2024 | Jun 11, 2024 |
| 4 | Insider transaction | Jun 13, 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 | — |
| 4 | Insider transaction | May 16, 2024 | May 15, 2024 |
| 424B3 | Prospectus | May 10, 2024 | — |
| 424B3 | Prospectus | May 10, 2024 | — |
| 424B3 | Prospectus | May 10, 2024 | — |
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.