SPTX Seaport Therapeutics, Inc.: institutional ownership and insider trading
56 funds reported holding $815M of Seaport Therapeutics, Inc. in their latest 13F filings; in Q2 2026 funds net bought $814M, with 54 new positions and 0 funds selling out; over the last 12 months insiders bought $20.0M and sold $0 on the open market.
SPTX revenue and earnings
- Quarter ended Jun 30, 2026: revenue n/a, net income −$62.6M, EPS -1.78
- Quarter ended Mar 31, 2026: revenue n/a, net income −$25.4M, EPS -10.34
- Quarter ended Jun 30, 2025: revenue n/a, net income −$15.1M, EPS -6.40
- Quarter ended Mar 31, 2025: revenue n/a, net income −$13.1M, EPS -5.65
Famous investors holding SPTX
- Ken Griffin (Citadel Advisors): $4.15M, 0.0% of the portfolio
- Izzy Englander (Millennium Management): $985K, 0.0% of the portfolio
Largest institutional holders of SPTX
- ARCH Venture Management, LLC — $137M
- GENERAL ATLANTIC, L.P. — $133M
- Sofinnova Investments, Inc. — $77.4M
- GOLDMAN SACHS GROUP INC (GS, GSCE, GS-PA, GS-PC, GS-PD) — $47.3M
- TRV GP VI, LLC — $44.8M
- CANADA PENSION PLAN INVESTMENT BOARD — $42.9M
- JPMORGAN CHASE & CO (JPM, AMJB, VYLD, JPM-PC, JPM-PD, JPM-PJ, JPM-PK, JPM-PL, JPM-PM) — $40.9M
- Foresite Capital Management VI LLC — $38.7M
- PRICE T ROWE ASSOCIATES INC /MD/ — $28.4M
- FMR LLC — $25.7M
Recent SPTX insider trades
- Jun 22, 2026: Hombach Robert J. bought 13,000 shares ($236K)
- May 4, 2026: Crandell Keith bought 1,100,000 shares ($19.8M)
5%+ owners
- PureTech Health plc: 31.2% (Schedule 13G, filed Aug 14, 2026)
- ARCH Venture Fund XII, L.P.: 11.9% (Schedule 13D, filed May 6, 2026)
- General Atlantic, L.P.: 11.5% (Schedule 13D, filed May 11, 2026)
- Zohar Daphne: 9.1% (Schedule 13G, filed Aug 5, 2026)
- PAUL STEVEN M: 6.3% (Schedule 13G, filed Aug 5, 2026)
- THE GOLDMAN SACHS GROUP, INC.: 5.5% (Schedule 13G, filed May 11, 2026)
Who owns the most SPTX stock?
The largest institutional holders of Seaport Therapeutics, Inc. in the latest 13F filings are ARCH Venture Management, LLC ($137M), GENERAL ATLANTIC, L.P. ($133M), Sofinnova Investments, Inc. ($77.4M).
Are insiders buying or selling SPTX?
Over the last 12 months insiders bought $20.0M and sold $0 of Seaport Therapeutics, Inc. stock on the open market (SEC Form 4).
Which famous investors own SPTX?
Ken Griffin, Izzy Englander.
Which ETFs hold SPTX?
4 ETFs and mutual funds hold it among their top 100 positions, including JGLYX, PHLAX, JAFKX, DADGX.