INBX insider buying
4 cluster buysInhibrx Biosciences, Inc.
When two or more insiders at Inhibrx Biosciences, Inc. buy INBX on the open market around the same time, that clustered conviction is one of the highest-signal patterns in SEC filing data. 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 – Sep 16, 2026Detected Sep 17, 2026High conviction3 insidersTotal bought$4.0MMarket capUnknown
- Sep 8 – Sep 8, 2026Detected Sep 8, 2026High conviction3 insidersTotal bought$3.5MMarket capUnknown
- Sep 8 – Sep 8, 2026Detected Sep 8, 2026High conviction2 insidersTotal bought$2.9MMarket capUnknown
1 more cluster 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 |
|---|---|---|---|---|---|
| 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 ↗ |
| Sep 16, 2024 | Lappe Markcluster Director, Chief Executive Officer | 13,037 | $17.13 | $223.3K | SEC ↗ |
| Sep 12, 2024 | Lappe Markcluster Director, Chief Executive Officer | 26,963 | $15.05 | $405.8K | SEC ↗ |
| Sep 11, 2024 | Director | 6,457 | $15.07 | $97.3K | SEC ↗ |
| Sep 10, 2024 | Lappe Markcluster Director, Chief Executive Officer | 8,500 | $15.19 | $129.1K | SEC ↗ |
| Sep 10, 2024 | Director | 179 | $15.00 | $2.7K | SEC ↗ |
| Sep 9, 2024 | Lappe Markcluster Director, Chief Executive Officer | 9,500 | $15.21 | $144.5K | SEC ↗ |
| Sep 6, 2024 | Lappe Markcluster Director, Chief Executive Officer | 26,000 | $15.29 | $397.5K | SEC ↗ |
| Sep 3, 2024 | Lappe Markcluster Director, Chief Executive Officer | 15,288 | $15.66 | $239.4K | SEC ↗ |
| Aug 30, 2024 | Lappe Markcluster Director, Chief Executive Officer | 10,000 | $14.02 | $140.2K | SEC ↗ |
| Aug 29, 2024 | Lappe Markcluster Director, Chief Executive Officer | 10,000 | $14.03 | $140.3K | SEC ↗ |
| Aug 29, 2024 | Director | 7,140 | $14.00 | $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 4 cluster buys where two or more insiders bought within a rolling window. The most recent qualifying activity was Sep 17, 2026.
- How much INBX stock have insiders bought?
- Insiders have bought a combined $15.3M of INBX across 37 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 4 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. Every figure on this page traces back to an official filing; open any row to jump straight to the source document. 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.