INBX's three largest insider shareholders as of June 18, 2026 are Inc. Inhibrx, (TenPercentOwner, 1.16Mn shares), Mark Lappe (Chief Executive Officer, 925.41K shares), Jon Faiz Kayyem (Director, 639.69K shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Global Investors Lp Viking | - | 0 | 102,864 | 09 Oct, 2025 |
| Kimberly Manhard | - | 0 | 10,000 | 30 Aug, 2024 |
| Douglas Forsyth | - | 0 | 224,564 | 26 Aug, 2024 |
| Mark Lappe | Chief Executive Officer | 0 | 925,413 | 16 Sep, 2024 |
| Jon Faiz Kayyem | - | 0 | 639,686 | 17 Dec, 2024 |
| Kristiina Md Vuori | - | 20,443 | 0 | 07 Oct, 2024 |
| Inc. Inhibrx, | - | 1,157,926 | 0 | 31 May, 2024 |
| Brendan P. Eckelman | Chief Scientific Officer | 0 | 473,888 | 30 May, 2024 |
* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.
| Transaction Date | Insider Name | Security Class | Transaction Type | Shares Traded | Price | Shares Remaining | Ownership | Code |
|---|---|---|---|---|---|---|---|---|
| 07 Oct, 2025 | Global Investors Lp Viking | Common Stock | D | 308,643 | $32.25 | 1,267,823 | I | S |
| 07 Oct, 2025 | Global Investors Lp Viking | Common Stock | D | 16,315 | $32.25 | 67,018 | I | S |
| 07 Oct, 2025 | Global Investors Lp Viking | Common Stock | D | 25,042 | $32.25 | 102,864 | I | S |
| 28 May, 2025 | Jon Faiz Kayyem | Stock Option (right to buy) | A | 15,000 | $0.00 | 15,000 | D | A |
| 28 May, 2025 | Kimberly Manhard | Stock Option (right to buy) | A | 15,000 | $0.00 | 15,000 | D | A |
| 28 May, 2025 | Kristiina Md Vuori | Stock Option (right to buy) | A | 15,000 | $0.00 | 15,000 | D | A |
| 28 May, 2025 | Jon Faiz Kayyem | Stock Option (right to buy) | A | 15,000 | $0.00 | 15,000 | D | A |
| 28 May, 2025 | Douglas Forsyth | Stock Option (right to buy) | A | 15,000 | $0.00 | 15,000 | D | A |
| 28 May, 2025 | Kimberly Manhard | Stock Option (right to buy) | A | 15,000 | $0.00 | 15,000 | D | A |
| 01 Apr, 2025 | David Matly | Stock Option (right to buy) | A | 50,000 | $0.00 | 50,000 | D | A |
| 01 Apr, 2025 | Kelly Deck | Stock Option (right to buy) | A | 15,000 | $0.00 | 15,000 | D | A |
| 01 Apr, 2025 | David Matly | Stock Option (right to buy) | A | 50,000 | $0.00 | 50,000 | D | A |
| 27 Mar, 2025 | Jon Faiz Kayyem | Common Stock | D | 90,000 | $0.00 | 419,360 | I | G |
| 27 Mar, 2025 | Jon Faiz Kayyem | Common Stock | D | 90,000 | $0.00 | 419,360 | I | G |
| 16 Dec, 2024 | Jon Faiz Kayyem | Common Stock | D | 500,000 | $0.00 | 509,360 | I | G |
| 16 Dec, 2024 | Jon Faiz Kayyem | Common Stock | D | 500,000 | $0.00 | 509,360 | I | G |
| 16 Dec, 2024 | Jon Faiz Kayyem | Common Stock | A | 250,000 | $0.00 | 250,000 | I | G |
| 16 Dec, 2024 | Jon Faiz Kayyem | Common Stock | A | 250,000 | $0.00 | 250,000 | I | G |
| 16 Dec, 2024 | Jon Faiz Kayyem | Common Stock | A | 250,000 | $0.00 | 250,000 | I | G |
| 16 Dec, 2024 | Jon Faiz Kayyem | Common Stock | A | 250,000 | $0.00 | 250,000 | I | G |