The Kayyem buy is a genuine conviction signal from a director, but INBX's historical pattern of bullish calls underperforming suggests caution. Monitor for additional insider buying or a catalyst (e.g., pipeline update) to confirm the signal.
Price Chart
Executive Summary
Inhibrx Biosciences (INBX) insider cluster shows a director (Kayyem) making a $500K open-market purchase at $100/share, while another director (Manhard) sold $163K worth over three small trades.
Key Financial Metrics
Key Facts
- Director Jon Faiz Kayyem purchased 5,000 shares in an open-market buy on 2026-09-16 at $100.00/share, totaling $500,000.
- Director Kimberly Manhard sold 1,500 shares in three open-market sales from 2026-09-11 to 2026-09-15, totaling ~$163,543.
- The Kayyem buy is a $500K open-market purchase by a director, exceeding the $100K threshold for a standalone bullish signal.
- The Manhard sales are small ($163K total) and represent ~0.05% of market cap — trivial and likely liquidity-driven.
Financial Impact
Director Kayyem's $500K open-market purchase is ~0.15% of market cap, a modest but material insider vote of confidence.
Risk Factors
- Director Manhard's concurrent sales, though small, create a mixed insider picture.
- No explicit catalyst (earnings, pipeline event) is tied to the cluster window.
Investment Themes
Documents Analyzed
This report is based on 1 SEC document filed with EDGAR.
| Document | Accession Number |
|---|---|
| CLUSTER Data (Synthetic) | cluster-INBX-1789681666014 |
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
Oct 14, 2026 12d ago | Insider Buy | $90.50 | awaiting T+60 | — | $95.66 (+5.70%) |
Sep 28, 2026 28d ago | Insider Cluster | $104.83 | awaiting T+60 | — | $95.66 (−8.75%) |
Sep 17, 2026 5w ago | Insider Cluster | $109.35 | awaiting T+60 | — | $95.66 (−12.52%) |
Sep 15, 2026 5w ago | Insider Cluster | $101.77 | awaiting T+60 | — | $95.66 (−6.00%) |
Sep 15, 2026 6w ago | 144 | $101.77 | awaiting T+60 | — | $95.66 (−6.00%) |
Sep 14, 2026 6w ago | 144 | $105.61 | awaiting T+60 | — | $95.66 (−9.42%) |
Sep 11, 2026 6w ago | 144 | $109.27 | awaiting T+60 | — | $95.66 (−12.46%) |
Sep 10, 2026 6w ago | Insider Cluster | $109.27 | awaiting T+60 | — | $95.66 (−12.46%) |
Sep 8, 2026 7w ago | Insider Cluster | $112.86 | awaiting T+60 | — | $95.66 (−15.24%) |
Sep 8, 2026 7w ago | Insider Buy | $112.86 | awaiting T+60 | — | $95.66 (−15.24%) |
US Market Status
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