Inhibrx Biosciences, Inc. (INBX) Insider Trading -- Recent Executive & Director Transactions
12 insiders reported 43 Form 4 transactions for Inhibrx Biosciences, Inc. (INBX) over the past 18 months (most recent 2026-09-28). Recent activity: Lappe Mark (Chief Executive Officer) Buy 3,324 shares, Lappe Mark (Chief Executive Officer) Buy 2,176 shares, Lappe Mark (Chief Executive Officer) Buy 1,500 shares, Lappe Mark (Chief Executive Officer) Buy 3,000 shares, Kayyem Jon Faiz (Director) Buy 5,000 shares. Source: SEC Form 4.
| Date | Insider | Title | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-09-28 | Lappe Mark | Chief Executive Officer | Buy | 3,324 | $328,630 |
| 2026-09-28 | Lappe Mark | Chief Executive Officer | Buy | 2,176 | $216,727 |
| 2026-09-28 | Lappe Mark | Chief Executive Officer | Buy | 1,500 | $148,320 |
| 2026-09-28 | Lappe Mark | Chief Executive Officer | Buy | 3,000 | $305,106 |
| 2026-09-23 | Kayyem Jon Faiz | Director | Buy | 5,000 | $500,000 |
| 2026-09-17 | Kayyem Jon Faiz | Director | Buy | 5,000 | $500,000 |
| 2026-09-15 | MANHARD KIMBERLY | Director | Sell | 500 | $55,888 |
| 2026-09-15 | MANHARD KIMBERLY | Director | Sell | 500 | $55,130 |
| 2026-09-15 | MANHARD KIMBERLY | Director | Sell | 500 | $52,525 |
| 2026-09-10 | MANHARD KIMBERLY | Director | Sell | 500 | $57,570 |
| 2026-09-10 | MANHARD KIMBERLY | Director | Sell | 500 | $57,898 |
| 2026-09-08 | FORSYTH DOUGLAS | Director | Buy | 2,500 | $286,617 |
| 2026-09-08 | Kayyem Jon Faiz | Director | Buy | 5,000 | $567,580 |
| 2026-09-08 | Lappe Mark | Chief Executive Officer | Buy | 6,605 | $664,719 |
| 2026-09-08 | Lappe Mark | Chief Executive Officer | Buy | 1,100 | $117,836 |
| 2026-09-08 | Lappe Mark | Chief Executive Officer | Buy | 500 | $54,118 |
| 2026-09-08 | Lappe Mark | Chief Executive Officer | Buy | 1,219 | $136,382 |
| 2026-09-08 | Lappe Mark | Chief Executive Officer | Buy | 9,681 | $1.1M |
| 2026-09-08 | Lappe Mark | Chief Executive Officer | Buy | 5,895 | $585,343 |
| 2025-10-09 | Viking Global Opportunities Illiquid Investments Sub-Master LP | 10% Owner | Sell | 308,643 | $10.0M |
| 2025-10-09 | VIKING GLOBAL INVESTORS LP | 10% Owner | Sell | 308,643 | $10.0M |
| 2025-10-09 | HALVORSEN OLE ANDREAS | 10% Owner | Sell | 308,643 | $10.0M |
| 2025-10-09 | Ott David C. | 10% Owner | Sell | 308,643 | $10.0M |
| 2025-10-09 | Viking Global Opportunities Portfolio GP LLC | 10% Owner | Sell | 308,643 | $10.0M |
| 2025-10-09 | Viking Global Opportunities GP LLC | 10% Owner | Sell | 308,643 | $10.0M |
Source: SEC Form 4 filings · as of 2026-09-28