Inhibrx Biosciences, Inc. (INBX)
Inhibrx Biosciences, Inc. (INBX) Insider Trading
Directors, officers and holders of more than 10% of INBX report their trades in its stock on SEC Form 4, within two business days. Each row below is one Form 4 transaction line. The one-letter code says what kind of transaction it was: only P (purchase) and S (sale) are open-market or private trades; awards, option exercises, tax withholding and gifts carry other codes.
Recent Form 4 transactions
The 50 most recent of 61 transactions on file: 26 with code P, 8 with code S and 16 with other codes.
| Date | Insider | Title | Code | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Oct 14, 2026 | Lappe Mark | Chief Executive Officer | P Purchase | 2,449 | $84.07 | $205,889 |
| Oct 14, 2026 | Lappe Mark | Chief Executive Officer | P Purchase | 100 | $85.76 | $8,576 |
| Oct 14, 2026 | Lappe Mark | Chief Executive Officer | P Purchase | 2,451 | $85.00 | $208,333 |
| Oct 14, 2026 | Lappe Mark | Chief Executive Officer | P Purchase | 2,470 | $84.07 | $207,655 |
| Oct 14, 2026 | Lappe Mark | Chief Executive Officer | P Purchase | 2,470 | $85.00 | $209,948 |
| Oct 14, 2026 | Lappe Mark | Chief Executive Officer | P Purchase | 100 | $85.76 | $8,576 |
| Sep 28, 2026 | Lappe Mark | Chief Executive Officer | P Purchase | 1,500 | $98.88 | $148,320 |
| Sep 28, 2026 | Lappe Mark | Chief Executive Officer | P Purchase | 3,000 | $101.70 | $305,106 |
| Sep 25, 2026 | Lappe Mark | Chief Executive Officer | P Purchase | 2,176 | $99.60 | $216,727 |
| Sep 25, 2026 | Lappe Mark | Chief Executive Officer | P Purchase | 3,324 | $98.87 | $328,630 |
| Sep 23, 2026 | Kayyem Jon Faiz | Director | P Purchase | 5,000 | $100.00 | $500,000 |
| Sep 16, 2026 | Kayyem Jon Faiz | Director | P Purchase | 5,000 | $100.00 | $500,000 |
| Sep 15, 2026 | MANHARD KIMBERLY | Director | S Sale | 500 | $105.05 | $52,525 |
| Sep 14, 2026 | MANHARD KIMBERLY | Director | S Sale | 500 | $110.26 | $55,130 |
| Sep 11, 2026 | MANHARD KIMBERLY | Director | S Sale | 500 | $111.78 | $55,888 |
| Sep 9, 2026 | MANHARD KIMBERLY | Director | S Sale | 500 | $115.80 | $57,898 |
| Sep 8, 2026 | Lappe Mark | Chief Executive Officer | P Purchase | 500 | $108.23 | $54,118 |
| Sep 8, 2026 | Lappe Mark | Chief Executive Officer | P Purchase | 5,895 | $99.29 | $585,343 |
| Sep 8, 2026 | Lappe Mark | Chief Executive Officer | P Purchase | 6,605 | $100.64 | $664,719 |
| Sep 8, 2026 | Kayyem Jon Faiz | Director | P Purchase | 5,000 | $113.52 | $567,580 |
| Sep 8, 2026 | FORSYTH DOUGLAS | Director | P Purchase | 2,500 | $114.65 | $286,617 |
| Sep 8, 2026 | Lappe Mark | Chief Executive Officer | P Purchase | 9,681 | $112.28 | $1,087,001 |
| Sep 8, 2026 | Lappe Mark | Chief Executive Officer | P Purchase | 1,219 | $111.88 | $136,382 |
| Sep 8, 2026 | Lappe Mark | Chief Executive Officer | P Purchase | 1,100 | $107.12 | $117,836 |
| Sep 8, 2026 | MANHARD KIMBERLY | Director | S Sale | 500 | $115.14 | $57,570 |
| Jun 3, 2026 | Kayyem Jon Faiz | Director | A Award | 10,000 | Not measured | Not measured |
| Jun 3, 2026 | Vuori Kristiina MD | Director | A Award | 10,000 | Not measured | Not measured |
| Jun 3, 2026 | MANHARD KIMBERLY | Director | A Award | 10,000 | Not measured | Not measured |
| Jun 3, 2026 | FORSYTH DOUGLAS | Director | A Award | 10,000 | Not measured | Not measured |
| Apr 24, 2026 | Matly David | President | A Award | 50,000 | Not measured | Not measured |
| Oct 7, 2025 | VIKING GLOBAL INVESTORS LP | 10% Owner | S Sale | 308,643 | $32.25 | $9,953,737 |
| Oct 7, 2025 | VIKING GLOBAL INVESTORS LP | 10% Owner | S Sale | 16,315 | $32.25 | $526,159 |
| Oct 7, 2025 | VIKING GLOBAL INVESTORS LP | 10% Owner | S Sale | 25,042 | $32.25 | $807,605 |
| May 28, 2025 | MANHARD KIMBERLY | Director | A Award | 15,000 | Not measured | Not measured |
| May 28, 2025 | FORSYTH DOUGLAS | Director | A Award | 15,000 | Not measured | Not measured |
| May 28, 2025 | Kayyem Jon Faiz | Director | A Award | 15,000 | Not measured | Not measured |
| May 28, 2025 | Vuori Kristiina MD | Director | A Award | 15,000 | Not measured | Not measured |
| Apr 1, 2025 | Matly David | President | A Award | 50,000 | Not measured | Not measured |
| Apr 1, 2025 | Deck Kelly | Chief Financial Officer | A Award | 15,000 | Not measured | Not measured |
| Mar 27, 2025 | Kayyem Jon Faiz | Director | G Gift | 90,000 | Not measured | Not measured |
| Dec 16, 2024 | Kayyem Jon Faiz | Director | G Gift | 250,000 | Not measured | Not measured |
| Dec 16, 2024 | Kayyem Jon Faiz | Director | G Gift | 250,000 | Not measured | Not measured |
| Dec 16, 2024 | Kayyem Jon Faiz | Director | G Gift | 500,000 | Not measured | Not measured |
| Dec 6, 2024 | Kayyem Jon Faiz | Director | G Gift | 52,000 | Not measured | Not measured |
| Nov 20, 2024 | Kayyem Jon Faiz | Director | P Purchase | 18,750 | $14.19 | $266,102 |
| Nov 20, 2024 | Kayyem Jon Faiz | Director | P Purchase | 18,750 | $14.19 | $266,102 |
| Nov 19, 2024 | Kayyem Jon Faiz | Director | P Purchase | 34,843 | $14.23 | $495,708 |
| Nov 19, 2024 | Kayyem Jon Faiz | Director | P Purchase | 34,843 | $14.23 | $495,708 |
| Oct 3, 2024 | Vuori Kristiina MD | Director | P Purchase | 6,667 | $15.00 | $100,005 |
| Sep 16, 2024 | Lappe Mark | Chief Executive Officer | P Purchase | 13,037 | $17.13 | $223,324 |
The full Form 4 history is on the INBX company page (Insider Trades card, View all).
Questions about this data
Which insider transactions are open-market trades?
Code P (open market or private purchase) and code S (open market or private sale). Code F is shares withheld to pay tax on vesting stock, A is an award from the company, M and X are option exercises and G is a gift. None of those is the insider choosing to buy or sell in the market.
How quickly are insider trades reported?
A Form 4 is due before the end of the second business day after the trade. The date shown is the transaction date from the form.
Who has to file Form 4?
Officers, directors and beneficial owners of more than 10% of a class of the company’s registered equity, under Section 16 of the Securities Exchange Act.
Look up any code in the Form 4 transaction code reference, or read Form 4 codes explained.