Seaport Therapeutics, Inc.
SPTX- Exchange
- Nasdaq
- Industry
- Pharmaceutical Preparations
- SEC CIK
- 0002042347
No open-market purchases or sales by Seaport Therapeutics, Inc. insiders were filed in the last 90 days; 54 institutions reported holding it in 13F filings for Q2 2026, worth $815.3M in total; no superinvestor holds it.
Key figures
- Insider buysOpen market, last 90 days
- 0
- Insider sellsOpen market, last 90 days
- 0
- 13F holdersQ2 2026, +54 vs. previous quarter
- 54
- 13F valueReported value at the end of Q2 2026
- $815.3M
- Superinvestors holdingAt the end of Q2 2026
- 0
Price chart
Superinvestors holding SPTX, Q2 2026
No superinvestor reported holding SPTX at the end of Q2 2026.
Latest insider trades
Open-market purchases and sales by Seaport Therapeutics, Inc. insiders from Form 4, newest first.
| Filed (ET) | Trade date | Filing delay | Insider | Transaction | Shares | Avg price | Value | Holding change | Flags |
|---|---|---|---|---|---|---|---|---|---|
| Jun 24, 2026 (view filing) | Jun 22 | 2 days | Hombach Robert J.Director | PPurchase | +13.0K | $18.14 | +$235.8K | New position13.0K after | |
| May 4, 2026 (view filing)6:02 PM ET | May 4 | Same day | Crandell Keith and 6 others10% Owner | PPurchase | +1.10M | $18.00 | +$19.8M | +21.2%6.29M after |
Top 10 13F holders, Q2 2026
The largest institutional positions in Seaport Therapeutics, Inc. at the end of Q2 2026; share changes are against Q1 2026.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| ARCH Venture Management, LLC | 6,294,951 | $136.6M | 12.42% | +6,294,951 | New |
| General Atlantic LLC | 6,101,582 | $132.5M | 4.56% | +6,101,582 | New |
| Sofinnova Investments, Inc. | 3,564,871 | $77.4M | 4.14% | +3,564,871 | New |
| Goldman Sachs Group Inc | 2,178,642 | $47.3M | 0.00% | +2,178,642 | New |
| TRV GP VI, LLC | 2,061,222 | $44.8M | 19.27% | +2,061,222 | New |
| Canada Pension Plan Investment Board | 1,975,791 | $42.9M | 0.02% | +1,975,791 | New |
| JPMorgan Chase & Co | 1,815,845 | $40.9M | 0.00% | +1,815,845 | New |
| Foresite Capital Management VI LLC | 1,779,521 | $38.7M | 6.02% | +1,779,521 | New |
| Price T Rowe Associates Inc | 1,308,604 | $28.4M | 0.00% | +1,308,604 | New |
| FMR LLC | 1,185,100 | $25.7M | 0.00% | +1,185,100 | New |