Seaport TherapeuticsSPTX
13F holders, Q2 2026 (June 30)54holders
2famous investors
$21.76avg. 13F price*
At the end of Q2 2026, 54 institutions reported holding Seaport Therapeutics Inc. (SPTX) in their 13F filings. The largest holders were ARCH Venture Management, LLC ($136.6M), General Atlantic, L.P. ($132.5M) and Sofinnova Investments, Inc. ($77.4M). 2 famous investors held it, including Ken Griffin (0.0% of Citadel Advisors's portfolio) and Israel Englander (0.0% of Millennium Management's portfolio).
- Company
- Seaport Therapeutics Inc.
- CUSIP
- 81221K108
- Latest filing quarter
- Q2 2026
Total Exit/New Position Q2 2026
| Institutions | Total Value | |
|---|---|---|
| New Positions | 54 | $815.3M |
| Exits | 0 | $0 |
Ownership 54 holders
| ARCH Venture Management, LLC | 12.42% | New | 6,294,951 | $136.6M |
| General Atlantic, L.P. | 4.56% | New | 6,101,582 | $132.5M |
| Sofinnova Investments, Inc. | 4.14% | New | 3,564,871 | $77.4M |
| Goldman Sachs Group Inc. | 0.01% | New | 2,178,642 | $47.3M |
| TRV GP Vi, LLC | 19.27% | New | 2,061,222 | $44.8M |
| Canada Pension Plan Investment Board | 0.02% | New | 1,975,791 | $42.9M |
| JPMorgan Chase & Co. | 0.00% | New | 1,815,845 | $40.9M |
| Foresite Capital Management VI LLC | 6.01% | New | 1,779,521 | $38.7M |
| T. Rowe Price Associates Inc. | 0.00% | New | 1,308,604 | $28.4M |
| FMR LLC | 0.00% | New | 1,185,100 | $25.7M |
| Bellevue Group AG | 0.50% | New | 1,100,000 | $23.9M |
| Siren, L.L.C. | 0.48% | New | 1,095,316 | $23.8M |
| Jennison Associates LLC | 0.01% | New | 1,079,669 | $23.5M |
| Ra Capital Management, L.P. | 0.13% | New | 700,000 | $15.2M |
| Vanguard Capital Management LLC | 0.00% | New | 599,217 | $13.0M |
| Woodline Partners LP | 0.04% | New | 586,345 | $12.7M |
| Braidwell LP | 0.42% | New | 500,000 | $10.9M |
| Perceptive Advisors LLC | 0.17% | New | 500,000 | $10.9M |
| Principal Financial Group Inc. | 0.00% | New | 414,672 | $9.0M |
| Aberdeen Group plc | 0.01% | New | 310,355 | $6.7M |
| UBS Group AG | 0.00% | New | 279,184 | $6.1M |
| BlackRock, Inc. | 0.00% | New | 229,863 | $5.0M |
| Seven Grand Managers, LLC | 0.20% | New | 225,000 | $4.9M |
| Citadel Advisors | 0.00% | New | 191,144 | $4.2M |
| Geode Capital Management, LLC | 0.00% | New | 175,866 | $3.8M |
| Pier Capital, LLC | 0.49% | New | 169,985 | $3.7M |
| Ameriprise Financial Inc. | 0.00% | New | 131,788 | $2.9M |
| Charles Schwab Investment Management Inc. | 0.00% | New | 97,693 | $2.1M |
| Vanguard Fiduciary Trust Co. | 0.00% | New | 87,772 | $1.9M |
| Pentwater Capital Management LP | 0.01% | New | 83,000 | $1.8M |
| Manufacturers Life Insurance Company, The | 0.00% | New | 82,565 | $1.8M |
| Alyeska Investment Group, L.P. | 0.00% | New | 75,000 | $1.6M |
| State Street Corp. | 0.00% | New | 66,650 | $1.4M |
| Alps Advisors Inc. | 0.01% | New | 54,328 | $1.2M |
| TD Asset Management Inc | 0.00% | New | 47,944 | $1.0M |
| Millennium Management | 0.00% | New | 45,337 | $985K |
| Gsa Capital Partners LLP | 0.05% | New | 33,178 | $721K |
| DAFNA Capital Management LLC | 0.13% | New | 32,400 | $704K |
| Northern Trust Corp. | 0.00% | New | 31,802 | $691K |
| ADAR1 Capital Management, LLC | 0.03% | New | 26,000 | $565K |
| Burkehill Global Management, LP | 0.02% | New | 25,000 | $543K |
| Ghisallo Capital Management LLC | 0.01% | New | 25,000 | $543K |
| Squarepoint Ops LLC | 0.00% | New | 24,753 | $538K |
| HighTower Advisors, LLC | 0.00% | New | 16,666 | $362K |
| Morgan Stanley | 0.00% | New | 11,692 | $254K |
| XTX Topco Ltd | 0.00% | New | 10,983 | $239K |
| Zimmer Partners, LP | 0.01% | New | 10,000 | $217K |
| Weiss Asset Management LP | 0.00% | New | 10,000 | $217K |
| Vanguard Portfolio Management LLC | 0.00% | New | 9,081 | $197K |
| Vanguard Global Advisers, LLC | 0.00% | New | 7,159 | $155K |
| Citigroup Inc. | 0.00% | New | 2,454 | $53K |
| Jones Financial Companies LLLP | 0.00% | New | 2,256 | $48K |
| Assetmark, Inc. | 0.00% | New | 1,431 | $31K |
| Barclays PLC | 0.00% | New | 837 | $18K |
"% of holder's portfolio" is SPTX's weight in each manager's 13F, not the share of Seaport Therapeutics Inc. the manager owns.