Seaport Therapeutics, Inc. SEC filings SPTX
Seaport Therapeutics, Inc. has 58 filings in SEC EDGAR's recent list, going back to Oct 31, 2024. The latest quarterly report (Form 10-Q) was filed on Nov 2, 2026, covering the quarter ended Sep 30, 2026. The most recent current report (Form 8-K) was filed on Nov 2, 2026 (results of operations). The company's fiscal year ends on December 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| 4 | Insider transaction | Nov 4, 2026 | Nov 3, 2026 |
| 10-Q | Quarterly report | Nov 2, 2026 | Sep 30, 2026 |
| 8-K |
Current report
Results of operations
|
Nov 2, 2026 | Nov 2, 2026 |
| SCHEDULE 13G | Ownership over 5% (passive) | Aug 14, 2026 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Aug 5, 2026 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Aug 5, 2026 | — |
| 10-Q | Quarterly report | Aug 3, 2026 | Jun 30, 2026 |
| 8-K |
Current report
Results of operations
|
Aug 3, 2026 | Aug 3, 2026 |
| 4 | Insider transaction | Jun 24, 2026 | Jun 22, 2026 |
| 10-Q | Quarterly report | Jun 8, 2026 | Mar 31, 2026 |
| 8-K |
Current report
Results of operations
|
Jun 8, 2026 | Jun 8, 2026 |
| SCHEDULE 13D | Ownership over 5% (active) | May 11, 2026 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | May 11, 2026 | — |
| 3 | Initial insider ownership | May 6, 2026 | May 4, 2026 |
| 3 | Initial insider ownership | May 6, 2026 | May 4, 2026 |
| 4 | Insider transaction | May 6, 2026 | May 4, 2026 |
| SCHEDULE 13D | Ownership over 5% (active) | May 6, 2026 | — |
| 4 | Insider transaction | May 4, 2026 | Apr 30, 2026 |
| 4 | Insider transaction | May 4, 2026 | May 4, 2026 |
| 4 | Insider transaction | May 4, 2026 | Apr 30, 2026 |
| 4 | Insider transaction | May 4, 2026 | Apr 30, 2026 |
| 4 | Insider transaction | May 4, 2026 | Apr 30, 2026 |
| 4 | Insider transaction | May 4, 2026 | Apr 30, 2026 |
| 4 | Insider transaction | May 4, 2026 | Apr 30, 2026 |
| 4 | Insider transaction | May 4, 2026 | Apr 30, 2026 |
| 4 | Insider transaction | May 4, 2026 | Apr 30, 2026 |
| 4 | Insider transaction | May 4, 2026 | May 4, 2026 |
| 4 | Insider transaction | May 4, 2026 | Apr 30, 2026 |
| 4 | Insider transaction | May 4, 2026 | Apr 30, 2026 |
| 4 | Insider transaction | May 4, 2026 | Apr 30, 2026 |
| 8-K |
Current report
Bylaw or fiscal year change
|
May 4, 2026 | May 4, 2026 |
| S-8 | Employee stock plan registration | May 4, 2026 | — |
| 424B4 | Prospectus | May 1, 2026 | — |
| EFFECT | Filing | Apr 30, 2026 | — |
| 3 | Initial insider ownership | Apr 30, 2026 | Apr 30, 2026 |
| 3 | Initial insider ownership | Apr 30, 2026 | Apr 30, 2026 |
| 3 | Initial insider ownership | Apr 30, 2026 | Apr 30, 2026 |
| 3 | Initial insider ownership | Apr 30, 2026 | Apr 30, 2026 |
| 3 | Initial insider ownership | Apr 30, 2026 | Apr 30, 2026 |
| 3 | Initial insider ownership | Apr 30, 2026 | Apr 30, 2026 |
| 3 | Initial insider ownership | Apr 30, 2026 | Apr 30, 2026 |
| 3 | Initial insider ownership | Apr 30, 2026 | Apr 30, 2026 |
| 3 | Initial insider ownership | Apr 30, 2026 | Apr 30, 2026 |
| 3 | Initial insider ownership | Apr 30, 2026 | Apr 30, 2026 |
| 3 | Initial insider ownership | Apr 30, 2026 | Apr 30, 2026 |
| 3 | Initial insider ownership | Apr 30, 2026 | Apr 30, 2026 |
| 3 | Initial insider ownership | Apr 30, 2026 | Apr 30, 2026 |
| 3 | Initial insider ownership | Apr 30, 2026 | Apr 30, 2026 |
| 3 | Initial insider ownership | Apr 30, 2026 | Apr 30, 2026 |
| S-1MEF | Filing | Apr 30, 2026 | — |
| CERT | Filing | Apr 30, 2026 | — |
| 8-A12B | Filing | Apr 28, 2026 | — |
| S-1/A | Amended registration statement | Apr 27, 2026 | — |
| S-1 | Registration statement | Apr 10, 2026 | — |
| DRS/A | Filing | Feb 27, 2026 | — |
| DRS/A | Filing | Jan 29, 2026 | — |
| DRS | Filing | Nov 21, 2025 | — |
| D | Filing | Oct 31, 2024 | — |
Showing 58 filings. 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.
New to this? Read What Are SEC Filings? 10-K, 10-Q, 8-K and Other Forms Explained.
Company profile
- Industry
- Pharmaceutical Preparations (SIC 2834)
- Listed as
- SPTX (Nasdaq)
- Fiscal year ends
- December 31
- Incorporated in
- DE
- Headquarters
- Boston, MA
- SEC filer status
- Non-accelerated filer, Smaller reporting company, Emerging growth company
- SEC CIK
- 2042347
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Source: SEC EDGAR filings. This is company-reported data, not investment advice.