Company · Ownership research

Seaport Therapeutics, Inc. SPTX

CIK 0002042347

Form 3 statements with an event date from Nov 1, 2023 to Nov 15, 2026.

Insider tradingInitial holdingsInstitutional holders

Some filings are submitted jointly by several insiders. The SEC form does not apportion the reported figures between them, so results include every joint filer.

Where insider ownership starts.

Form 3 is an initial ownership statement filed when someone becomes a reporting insider. These holdings do not mean they bought shares that day.

202617 of 17 statements

Holdings date	Insider	Initial holdings
May 4, 2026	GAP Coinvestments CDA, L.P. · General Atlantic Partners (Lux), SCSp · General Atlantic GenPar (Lux) SCSp · General Atlantic (Lux) S.a r.l. Director · 10% owner / Director · 10% owner / Director · 10% owner / Director · 10% owner	6.10M shares	▾
May 4, 2026	GENERAL ATLANTIC, L.P. · GAP COINVESTMENTS III, LLC · GAP COINVESTMENTS IV, LLC · GAP (Bermuda) L.P. · GENERAL ATLANTIC GENPAR, L.P. · GENERAL ATLANTIC GENPAR (BERMUDA), L.P. · General Atlantic Partners 100, L.P. · General Atlantic (SPV) GP, LLC · GAP Coinvestments V, LLC · General Atlantic (SP), L.P. Director · 10% owner / Director · 10% owner / Director · 10% owner / Director · 10% owner / Director · 10% owner / Director · 10% owner / Director · 10% owner / Director · 10% owner / Director · 10% owner / Director · 10% owner	6.10M shares	▾
Apr 30, 2026	PureTech Health plc · PureTech LYT, Inc. 10% owner / 10% owner	302.48K shares · 3 derivative holdings	▾
Apr 30, 2026	PETERSON SANDRA E Director	2 derivative holdings	▾
Apr 30, 2026	Zohar Daphne Chief Executive Officer · Director	1.19M shares · 3 derivative holdings	▾
Apr 30, 2026	Mates Sharon Director	No securities reported	▾
Apr 30, 2026	Torres Denice Director	3 derivative holdings	▾
Apr 30, 2026	White Lauren Chief Financial Officer	4 derivative holdings	▾
Apr 30, 2026	Pitts Jason Director	No securities reported	▾
Apr 30, 2026	Wheadon David E. Director	2 derivative holdings	▾
Apr 30, 2026	HEALY JAMES Director	2 derivative holdings	▾
Apr 30, 2026	PAUL STEVEN M Director	796.00K shares · 4 derivative holdings	▾
Apr 30, 2026	CRANDELL KEITH · NELSEN ROBERT · GILLIS STEVEN · Burow Kristina · ARCH Venture Fund XII, L.P. · ARCH Venture Partners XII, LLC · ARCH Venture Partners XII, L.P. 10% owner / 10% owner / 10% owner / 10% owner / 10% owner / 10% owner / 10% owner	2 derivative holdings	▾
Apr 30, 2026	Gladstein Lana General Counsel	4 derivative holdings	▾
Apr 30, 2026	Chen Michael Cunyuan Chief Scientific Officer	5 derivative holdings	▾
Apr 30, 2026	HOMBACH ROBERT J. Director	2 derivative holdings	▾
Apr 30, 2026	Loebel Antony Chief Medical Officer	4 derivative holdings	▾

Showing 17 / 17 statements in 2026. The complete set is available through the API.

Seaport Therapeutics, Inc. · SPTX

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Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.