INBX insider buying
7 cluster buysInhibrx Biosciences, Inc.
When two or more insiders at Inhibrx Biosciences, Inc. buy INBX in a qualifying detection window, the grouped purchases provide a starting point for further research. Below is every cluster we've detected in INBX 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
- Sep 8 – Oct 14, 2026Detected Oct 14, 2026Executive buyer3 insidersTotal bought$6.3MMarket capUnknown
- Sep 8 – Sep 28, 2026Detected Sep 28, 2026Executive buyer3 insidersTotal bought$5.5MMarket capUnknown
- Sep 8 – Sep 23, 2026Detected Sep 23, 2026Executive buyer3 insidersTotal bought$4.5MMarket capUnknown
4 more clusters in INBX
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All notable open-market buys in INBX
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 |
|---|---|---|---|---|---|
| Oct 14, 2026 | Lappe Markcluster Director, Chief Executive Officer | 2,470 | $85.00 | $209.9K | SEC ↗ |
| Oct 14, 2026 | Lappe Markcluster Director, Chief Executive Officer | 2,451 | $85.00 | $208.3K | SEC ↗ |
| Oct 14, 2026 | Lappe Markcluster Director, Chief Executive Officer | 2,470 | $84.07 | $207.7K | SEC ↗ |
| Oct 14, 2026 | Lappe Markcluster Director, Chief Executive Officer | 2,449 | $84.07 | $205.9K | SEC ↗ |
| Oct 14, 2026 | Lappe Markcluster Director, Chief Executive Officer | 100 | $85.76 | $8.6K | SEC ↗ |
| Oct 14, 2026 | Lappe Markcluster Director, Chief Executive Officer | 100 | $85.76 | $8.6K | SEC ↗ |
| Sep 28, 2026 | Lappe Markcluster Director, Chief Executive Officer | 3,000 | $101.70 | $305.1K | SEC ↗ |
| Sep 28, 2026 | Lappe Markcluster Director, Chief Executive Officer | 1,500 | $98.88 | $148.3K | SEC ↗ |
| Sep 25, 2026 | Lappe Markcluster Director, Chief Executive Officer | 3,324 | $98.87 | $328.6K | SEC ↗ |
| Sep 25, 2026 | Lappe Markcluster Director, Chief Executive Officer | 2,176 | $99.60 | $216.7K | SEC ↗ |
| Sep 23, 2026 | Kayyem Jon Faizcluster Director | 5,000 | $100.00 | $500.0K | SEC ↗ |
| Sep 16, 2026 | Kayyem Jon Faizcluster Director | 5,000 | $100.00 | $500.0K | SEC ↗ |
| Sep 8, 2026 | Lappe Markcluster Director, Chief Executive Officer | 9,681 | $112.28 | $1.1M | SEC ↗ |
| Sep 8, 2026 | Lappe Markcluster Director, Chief Executive Officer | 6,605 | $100.64 | $664.7K | SEC ↗ |
| Sep 8, 2026 | Lappe Markcluster Director, Chief Executive Officer | 5,895 | $99.29 | $585.3K | SEC ↗ |
| Sep 8, 2026 | Kayyem Jon Faizcluster Director | 5,000 | $113.52 | $567.6K | SEC ↗ |
| Sep 8, 2026 | FORSYTH DOUGLAScluster Director | 2,500 | $114.65 | $286.6K | SEC ↗ |
| Sep 8, 2026 | Lappe Markcluster Director, Chief Executive Officer | 1,219 | $111.88 | $136.4K | SEC ↗ |
| Sep 8, 2026 | Lappe Markcluster Director, Chief Executive Officer | 1,100 | $107.12 | $117.8K | SEC ↗ |
| Sep 8, 2026 | Lappe Markcluster Director, Chief Executive Officer | 500 | $108.24 | $54.1K | SEC ↗ |
| Nov 20, 2024 | Director | 18,750 | $14.19 | $266.1K | SEC ↗ |
| Nov 20, 2024 | Director | 18,750 | $14.19 | $266.1K | SEC ↗ |
| Nov 19, 2024 | Director | 34,843 | $14.23 | $495.8K | SEC ↗ |
| Nov 19, 2024 | Director | 34,843 | $14.23 | $495.8K | SEC ↗ |
| Oct 3, 2024 | Director | 6,667 | $15.00 | $100.0K | SEC ↗ |
INBX insider buying — FAQ
- Are insiders buying INBX stock?
- Yes — 6 distinct insiders have bought INBX (Inhibrx Biosciences, Inc.) on the open market, including 7 cluster buys where two or more insiders bought within a rolling window. The most recent qualifying activity was Oct 14, 2026.
- How much INBX stock have insiders bought?
- Insiders have bought a combined $17.6M of INBX across 48 open-market purchases, based on SEC Form 4 filings.
- What is an insider cluster buy in INBX?
- A cluster buy is two or more distinct Inhibrx Biosciences, Inc. insiders — officers, directors, or 10% owners — each buying INBX on the open market within a rolling window. INBX has 7 detected cluster buys to date.
- Where does this INBX 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 INBX
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 INBX 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 INBX.