Are insiders buying or selling Seaport Therapeutics, Inc. stock?

Based on the last 50 SEC Form 4 filings, Seaport Therapeutics, Inc. insiders made 1 open-market purchase and 0 open-market sales.

Where can I see Seaport Therapeutics, Inc. insider trading activity?

SEC Form 4 filings for Seaport Therapeutics, Inc. (SPTX) are publicly available on EDGAR and aggregated at form4api.com/companies/sptx.

// company-profile

Name: Seaport Therapeutics, Inc. Insider Trading Data
Creator: Form4API
License: https://www.sec.gov/privacy.htm

SPTX

ExchangeNasdaqSectorPharmaceutical PreparationsInc.DEFilings14Insiders21

// api This Seaport Therapeutics, Inc. insider-trading data is served live by the Form4API insider trading API. Get the same data via API.

// activity-summary

No insider transactions in the last 30 days.

// 90-day insight

Over the last 90 days, Seaport Therapeutics, Inc. insiders bought $19.8M across 14 transactions with no open-market sales.

Most active insider: PureTech Health plc with 6 transactions totaling $0.
Largest single purchase: $19.8M by ARCH Venture Partners XII, LLC on May 4, 2026.

Activity skews bullish — buys outpace sales.

Sourced from SEC EDGAR Form 4 filings. Updated hourly.

Date	Insider	Company	Type	Shares	Price	Value	1d	1w	1m	3m	6m
May 4, 2026	Chen Michael Cunyuan	SPTX	C	10,526	$0.00	$0K	-5.9%	-10.3%	—	—	—
May 4, 2026	Gladstein Lana	SPTX	C	33,515	—	—	—	—	—	—	—
May 4, 2026	Gladstein Lana	SPTX	C	105,263	$0.00	$0K	—	—	—	—	—
May 4, 2026	HEALY JAMES	SPTX	C	1,927,159	—	—	—	—	—	—	—
May 4, 2026	HEALY JAMES	SPTX	C	804,379	—	—	—	—	—	—	—

35 more transactions hidden

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