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SPTX insider trading

Seaport Therapeutics, Inc. — open-market insider buys and $1M+ sells from SEC Forms 3, 4 and 5.
Insider buys · 24 mo
2
Bought · 24 mo
$20.0M
Buys · last 90 days
1 · $236k
Most recent buy
2026-06-24

Recent insider filings

FiledInsiderTypeSharesPriceValue
2026-06-24HOMBACH ROBERT J.
Director
Bought13,000$18.14$236k
2026-05-04ARCH Venture Fund XII, L.P.
10% owner
Bought1,100,000$18.00$19.8M

Most active insider buyers

InsiderRoleBuysTotal bought
ARCH Venture Fund XII, L.P.10% owner1$19.8M
HOMBACH ROBERT J.Director1$236k

See SPTX on the chart

Every insider buy and sell for SPTX plotted on the price, the full two-year history, cluster scores and daily updates — in the members area, $29/month. A free quarterly sample of the whole dataset needs no account.

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Data from the SEC EDGAR ownership filings, refreshed daily. Only open-market purchases (transaction code P) and sales of $1M or more are shown; grants, option exercises and tax withholding are excluded because they run on schedules set years earlier. Not investment advice.