3 insiders at Inhibrx Biosciences Inc. (INBX) reported open-market stock purchases totaling $6,347,357 in recent weeks, according to filings with the U.S. Securities and Exchange Commission. The largest reported purchase came from Kayyem Jon Faiz (director), who acquired 5,000 shares at $100.00 on September 23, 2026.
Source: SEC Form 4. Option grants and tax-withholding sales are excluded.
| Date | Insider | Role | Shares | Price | Value | Source |
|---|---|---|---|---|---|---|
| 2026-10-14 | Lappe Mark | director, officer: Chief Executive Officer | 100 | $85.76 | $8,576 | SEC Form 4 |
| 2026-10-14 | Lappe Mark | director, officer: Chief Executive Officer | 2,470 | $85.00 | $209,948 | SEC Form 4 |
| 2026-10-14 | Lappe Mark | director, officer: Chief Executive Officer | 2,470 | $84.07 | $207,655 | SEC Form 4 |
| 2026-10-14 | Lappe Mark | director, officer: Chief Executive Officer | 100 | $85.76 | $8,576 | SEC Form 4 |
| 2026-10-14 | Lappe Mark | director, officer: Chief Executive Officer | 2,451 | $85.00 | $208,333 | SEC Form 4 |
| 2026-10-14 | Lappe Mark | director, officer: Chief Executive Officer | 2,449 | $84.07 | $205,889 | SEC Form 4 |
| 2026-09-28 | Lappe Mark | director, officer: Chief Executive Officer | 3,000 | $101.70 | $305,106 | SEC Form 4 |
| 2026-09-28 | Lappe Mark | director, officer: Chief Executive Officer | 1,500 | $98.88 | $148,320 | SEC Form 4 |
| 2026-09-25 | Lappe Mark | director, officer: Chief Executive Officer | 2,176 | $99.60 | $216,727 | SEC Form 4 |
| 2026-09-25 | Lappe Mark | director, officer: Chief Executive Officer | 3,324 | $98.87 | $328,630 | SEC Form 4 |
| 2026-09-23 | Kayyem Jon Faiz | director | 5,000 | $100.00 | $500,000 | SEC Form 4 |
| 2026-09-16 | Kayyem Jon Faiz | director | 5,000 | $100.00 | $500,000 | SEC Form 4 |
Inhibrx Biosciences Inc. is a Healthcare company in the Biotechnology industry. It carried a market capitalization of about $1.3B, with shares trading near $85.26.
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