Company profile
Inhibrx, Inc. Insider Trading
INBXEvery SEC Form 4 insider trading filing for Inhibrx, Inc. (INBX) since April 2023 — open-market buys and sells by directors and officers, option exercises, and cluster activity, updated as each filing is reported to the SEC. Why 2023?
- Sector
- Biological Products, (No Diagnostic Substances)
- CIK
- 0001739614
- Filings
- 22
- Insiders
- 15
- Last filing
- 2026-09-16
Activity summary
Recent insider activity is bullish. Over the last 30 days, 9 insiders purchased shares (net $3.7M) versus 5 sales. Buying was led by Mark Lappe.
Quarterly balance
Buy and sell value by quarter, Q2 23 to Q2 24. Inhibrx, Inc. insiders are net sellers across the period shown.
Bars below the rule are sales, above are purchases. Largest quarter on the chart is $279.5M.
90 day insight
Over the last 90 days, Inhibrx, Inc. insiders bought $4.0M (9 transactions) and sold $279K (5 transactions).
- Most active insider: Mark Lappe with 6 transactions totaling $2.6M.
- Largest single purchase: $1.1M by Mark Lappe on Sep 8, 2026.
Activity skews bullish — buys outpace sales.
Insider Transactions
Sourced from SEC EDGAR Form 4 filings. Updated hourly.
| Date | Insider | Company | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Sep 16, 2026 | Jon Faiz Kayyem | INBX | Purchase | 5,000 | $100.00 | $500K |
| Sep 15, 2026 | Kimberly Manhard | INBX | Sale | 500 | $105.05 | $53K |
| Sep 14, 2026 | Kimberly Manhard | INBX | Sale | 500 | $110.26 | $55K |
| Sep 11, 2026 | Kimberly Manhard | INBX | Sale | 500 | $111.78 | $56K |
| Sep 9, 2026 | Kimberly Manhard | INBX | Sale | 500 | $115.80 | $58K |
45 more transactions hidden
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-H "X-Api-Key: $KEY"Top insiders
By total value filed.
Institutional Ownership
Top 13F-HR holders of Inhibrx, Inc. as of 2026-06-30
Data source: quarterly 13F-HR filings — institutional holders report positions within 45 days of quarter end. Joined with insider activity above — see who's loading up institutionally while insiders are trading. Full 13F-HR API →