SPTX Seaport Therapeutics, Inc.
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Executive Summary
General Atlantic entities filed Form 3 initial beneficial ownership disclosures for Seaport Therapeutics (SPTX), reporting 6,101,582 shares of common stock held indirectly through General Atlantic (SP), L.P., including 3,351,582 shares issuable upon conversion of Series B preferred stock. This is a routine initial ownership filing by a major institutional investor following the company's IPO or listing, confirming a significant pre-IPO stake but providing no new trading signal.
Actionable Insight
This is a routine Form 3 filing confirming General Atlantic's pre-IPO stake. No immediate trading action is warranted. Monitor for any subsequent Form 4 filings that would indicate insider buying or selling, which would carry more signal.
Key Facts
- General Atlantic entities collectively report beneficial ownership of 6,101,582 shares of SPTX common stock.
- Of these, 3,351,582 shares are issuable upon conversion of Series B preferred stock.
- The filing is an initial statement of beneficial ownership (Form 3) filed on 2026-05-06, covering ownership as of 2026-05-04.
- Reporting owners include GAP Coinvestments CDA, L.P., General Atlantic Partners (Lux), SCSp, General Atlantic GenPar (Lux) SCSp, and General Atlantic (Lux) S.a r.l.
- The filing notes that the reporting persons may be deemed a group under the Exchange Act and are directors-by-deputization for Section 16 purposes.
Financial Impact
No financial impact — the filing discloses existing ownership, not a new transaction.
Risk Factors
- No material risks identified from this filing alone.
Market Snapshot
Documents Analyzed
This report is based on 3 SEC documents filed with EDGAR.
| Document | Accession Number |
|---|---|
| 3 Filing (Primary) | 0000950142-26-001309 |
| Document: 0000950142-26-001309-index.html | 0000950142-26-001309 |
| Document: 0000950142-26-001309.txt | 0000950142-26-001309 |
Track record builds as more directional reports settle.
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
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Jun 8, 2026
6d ago
|
8-K
| $16.71 awaiting T+20 | awaiting T+20 | — | $18.00 (+7.72%) |
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May 7, 2026
5w ago
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3
| $15.50 $17.23 | ▲ +11.16% | ▲ +8.03% | $18.00 (+16.13%) |
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May 1, 2026
6w ago
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424B4
| $17.00 $17.13 | ▲ +0.76% | ▼ −4.88% | $18.00 (+5.88%) |
|
May 1, 2026
6w ago
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3
| $19.84 $17.13 | ▼ −13.66% | ▼ −18.94% | $18.00 (−9.27%) |
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May 1, 2026
6w ago
|
3
| $19.84 $17.13 | ▼ −13.66% | ▼ −18.94% | $18.00 (−9.27%) |
|
May 1, 2026
6w ago
|
3
| $19.84 $17.13 | ▼ −13.66% | ▼ −18.94% | $18.00 (−9.27%) |
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May 1, 2026
6w ago
|
3
| $19.84 $17.13 | ▼ −13.66% | ▼ −18.94% | $18.00 (−9.27%) |
|
May 1, 2026
6w ago
|
3
| $19.84 $17.13 | ▼ −13.66% | ▼ −18.94% | $18.00 (−9.27%) |
|
Apr 27, 2026
6w ago
|
S-1/A
| — | awaiting T+20 | — | — |
US Market Status
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