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Seaport Therapeutics Inc (SPTX)

CUSIP: 81221K108 | NYSE | 60 institutional holders

Quarters

Q3 2026Q2 2026
CompareDetailedHistoricalFundsOptions13D/13GPeersTargetingTrading SummaryProfile

Beneficial Ownership — 13D / 13G

Full history →

5%+ stakes reported outside the quarterly cycle. A 13D is due within five business days of the event below, so these figures lead the holders table until the filer's next 13F catches up to them.

HolderShares% of ClassChangeEvent Datevs 13F
13GPureTech Health plc16,685,01331.2%New 5%+ stakeJun 30, 2026No 13F filer matched
13GZohar Daphne5,225,4979.1%New 5%+ stakeJun 30, 2026

Institutional Holders — Q3 2026

Principal Financial Group Inc377,391
0.0% of portfolio›$7.6M
Geode Capital Management, LLC377,231
0.0% of portfolio›$7.6M
Aberdeen Group plc267,678
0.0% of portfolio›$35.9M
Alps Advisors Inc70,921
0.0% of portfolio›$1.4M
Bank of New York Mellon Corp29,489
0.0% of portfolio›$594.8K
Deutsche Bank Ag\12,024
0.0% of portfolio›$242.5K
Citigroup Inc6,820
0.0% of portfolio›$137.6K
Barclays PLC5,600
0.0% of portfolio›$113.0K
Strs Ohio3,800
0.0% of portfolio›$76.6K
Assetmark, Inc1,767
0.0% of portfolio›$35.6K
Russell Investments Group, Ltd.1,093
0.0% of portfolio›$22.0K
Sterling Capital Management LLC391
0.0% of portfolio›$7.9K
Farther Finance Advisors, LLC334
0.0% of portfolio›$6.7K
StyleTurnoverLocationFiled
Principal Financial Group Inc
377,391$7.6M0.0%CoreLowDes Moines, IA2026-11-02
Geode Capital Management, LLC
377,231$7.6M0.0%IndexVery LowBoston, MA2026-11-06
Aberdeen Group plc
267,678$35.9M0.0%CoreLowEdinburgh, United Kingdom2026-11-06
Alps Advisors Inc
70,921$1.4M0.0%YieldLowDenver, CO2026-11-03
Bank of New York Mellon Corp
29,489$594.8K0.0%CoreLowNew York, NY2026-11-05
Deutsche Bank Ag\
12,024$242.5K0.0%CoreMediumFrankfurt Am Main, Hong Kong2026-11-06
Citigroup Inc
6,820$137.6K0.0%CoreMediumNew York, NY2026-11-04
Barclays PLC
5,600$113.0K0.0%CoreMediumLondon, United Kingdom2026-11-06
Strs Ohio
3,800$76.6K0.0%CoreMediumColumbus, OH2026-10-30
Assetmark, Inc
1,767$35.6K0.0%ETFLowConcord, CA2026-10-21
Russell Investments Group, Ltd.
1,093$22.0K0.0%CoreLowSeattle, WA2026-11-06
Sterling Capital Management LLC
391$7.9K0.0%GARPMediumCharlotte, NC2026-10-22
Farther Finance Advisors, LLC
334$6.7K0.0%IndexLowSan Francisco, CA2026-10-08
No 13F filer matched
13GPaul Steven M3,516,7186.3%New 5%+ stakeJun 30, 2026No 13F filer matched
13DArch Venture Fund XII, L.P.6,294,95111.9%New 5%+ stakeMay 4, 2026No 13F filer matched
13GPureTech Health plc16,685,013
31.2% of class · Jun 30, 2026New 5%+ stake
No 13F filer matched
13GZohar Daphne5,225,497
9.1% of class · Jun 30, 2026New 5%+ stake
No 13F filer matched
13GPaul Steven M3,516,718
6.3% of class · Jun 30, 2026New 5%+ stake
No 13F filer matched
13DArch Venture Fund XII, L.P.6,294,951
11.9% of class · May 4, 2026New 5%+ stake
No 13F filer matched