Greedy Insider
INBX Insider Trades and Greediness Scores
Inhibrx Biosciences, Inc. (INBX) insider trades: since Sep 8, 2026, Greedy Insider recorded 20 open-market buys and 5 sales on Form 4 from 4 insiders. The strongest recent filing scored 85 (Strong).
Who bought and who sold
Across the last 25 scoreable Form 4 transactions in INBX, 20 were open-market purchases and 5 were sales. The table lists the most recent filings with each one's Greediness Score, so the structurally unusual trades are easy to spot first.
| Insider | Role | Type | Shares | Date | Score | ||
|---|---|---|---|---|---|---|---|
| Lappe Mark | CEO | Buy | 2470.0 | 207654.62 | 2026-10-14 | 59 | View |
| Lappe Mark | CEO | Buy | 2470.0 | 209948.03 | 2026-10-14 | 59 | View |
| Lappe Mark | CEO | Buy | 100.0 | 8576.0 | 2026-10-14 | 47 | View |
| Lappe Mark | CEO | Buy | 2449.0 | 205889.14 | 2026-10-14 | 59 | View |
| Lappe Mark | CEO | Buy | 2451.0 | 208333.05 | 2026-10-14 | 58 | View |
| Lappe Mark | CEO | Buy | 100.0 | 8576.0 | 2026-10-14 | 47 | View |
| Lappe Mark | CEO | Buy | 1500.0 | 148320.45 | 2026-09-28 | 56 | View |
| Lappe Mark | CEO | Buy | 3000.0 | 305106.0 | 2026-09-28 | 63 | View |
| Lappe Mark | CEO | Buy | 3324.0 | 328630.25 | 2026-09-25 | 63 | View |
| Lappe Mark | CEO | Buy | 2176.0 | 216726.98 | 2026-09-25 | 58 | View |
The strongest recent filing
Lappe Mark (CEO) bought 9,681 shares of Inhibrx Biosciences, Inc. on Sep 8, 2026, a filing that scored 85 (Strong). It scored Strong because a senior insider was trading and the trade was large versus this insider's own history. The score describes the filing, not future returns. This is not investment advice.
Cluster activity
A cluster buy is present: 3 insiders (Lappe Mark, Kayyem Jon Faiz, FORSYTH DOUGLAS) traded INBX the same direction within a 7-day window. Shared conviction is a stronger structural signal than a lone trade.
How this compares with Inhibrx Biosciences, Inc.'s own history
Open-market buys make up 80% of the 25 scoreable INBX transactions on record between Sep 8, 2026 and Oct 14, 2026. Comparing a filing with the company's own buy/sell mix is how you tell a routine disposal from an unusual accumulation.
Methodology and sources
Scores come from six published, user-adjustable factors (insider role, cluster activity, trade size versus the insider's own history, position impact, filing urgency, and direct versus indirect ownership). The score describes the filing, not future returns. This is not investment advice.
Key facts
- Scoreable Form 4 transactions on record: 25
- Open-market buys: 20
- Sales: 5
- Distinct insiders: 4
- Strongest recent Greediness Score: 85 (Strong)
Primary sources
Related
- Strongest filing
- INBX in the live feed
- How the Greediness Score works
- What is a cluster buy?
- Form 4 transaction codes
The score describes the filing, not future returns. This is not investment advice.