SPTX insider buying
1 cluster buySeaport Therapeutics, Inc.
When two or more insiders at Seaport Therapeutics, Inc. buy SPTX in a qualifying detection window, the grouped purchases provide a starting point for further research. Below is every cluster we've detected in SPTX plus the full record of qualifying open-market buys, each parsed directly from Form 4 filings and linked back to the source on SEC EDGAR.
Detected clusters
- May 4 – Jun 22, 2026Detected Jun 22, 20262 insidersTotal bought$20.0MMarket cap$1.0B
All notable open-market buys in SPTX
Every open-market Form 4 purchase, newest first. Click an insider to see their full buying record across companies.
| Date | Insider | Shares | Price | Value | Filing |
|---|---|---|---|---|---|
| Nov 3, 2026 | Director | 5,000 | $19.87 | $99.3K | SEC ↗ |
| Jun 22, 2026 | HOMBACH ROBERT J.cluster Director | 13,000 | $18.14 | $235.8K | SEC ↗ |
| May 4, 2026 | 10% Owner | 1,100,000 | $18.00 | $19.8M | SEC ↗ |
SPTX insider buying — FAQ
- Are insiders buying SPTX stock?
- Yes — 3 distinct insiders have bought SPTX (Seaport Therapeutics, Inc.) on the open market, including 1 cluster buy where two or more insiders bought within a rolling window. The most recent qualifying activity was Nov 4, 2026.
- How much SPTX stock have insiders bought?
- Insiders have bought a combined $20.1M of SPTX across 3 open-market purchases, based on SEC Form 4 filings.
- What is an insider cluster buy in SPTX?
- A cluster buy is two or more distinct Seaport Therapeutics, Inc. insiders — officers, directors, or 10% owners — each buying SPTX on the open market within a rolling window. SPTX has 1 detected cluster buy to date.
- Where does this SPTX insider trading data come from?
- Every figure is parsed directly from SEC Form 4 filings on EDGAR, and each purchase on this page links back to its original filing document.
How we track insider buying in SPTX
We continuously poll SEC EDGAR for new Form 4 filings and parse every open-market purchase (transaction code P). A cluster is recorded when two or more distinct insiders — officers, directors, or 10% owners — each buy SPTX within a rolling window. We track clusters at every company size, from micro-caps to mega-caps. Transactions link to official filings; prices and market capitalizations may be cached market data. Read our methodology and data limits before interpreting the figures. What counts as a cluster buy?
This page is informational and reflects public filing data. It is not investment advice or a recommendation regarding SPTX.