As of March 23, 2026, the three largest insider holders of NKTR are Track Capital, Lp Deep (TenPercentOwner, 18.34Mn shares), Jillian B. Thomsen (Chief Financial Officer, 313.50K shares), Gil M Labrucherie (Svp, Coo Cfo, 312.90K shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Track Capital, Lp Deep | 0 | 18,344,000 | 13 May, 2024 | |
| Jillian B. Thomsen | Chief Financial Officer | 313,497 | 0 | 17 Feb, 2023 |
| Gil M Labrucherie | Svp, Coo Cfo | 312,905 | 0 | 17 May, 2022 |
| R Scott Greer | 303,574 | 0 | 20 Sep, 2022 | |
| Robert Chess | 255,273 | 0 | 14 Jun, 2024 | |
| Robert Chess | 255,273 | 0 | 14 Jun, 2024 | |
| John Northcott | Svp Chief Commercial Officer | 223,210 | 0 | 17 May, 2022 |
| Roy A Whitfield | 216,250 | 0 | 15 Jun, 2023 | |
| Howard W Robin | President Ceo | 75,489 | 0 | 20 Feb, 2026 |
| Jeffrey Robert Ajer | 34,153 | 0 | 20 Sep, 2022 | |
| Diana Brainard | 28,560 | 0 | 20 Sep, 2022 | |
| Myriam Curet | 27,418 | 0 | 20 Sep, 2023 | |
| Karin Eastham | 23,233 | 0 | 20 Sep, 2022 | |
| Mark Andrew Wilson | Chief Legal Officer | 21,585 | 0 | 25 Nov, 2025 |
| Jonathan Zalevsky | Chief Rd Officer | 21,174 | 0 | 20 Feb, 2026 |
| Robert Chess | 0 | 2,100 | 26 Aug, 2021 | |
| Robert Chess | 0 | 2,100 | 26 Aug, 2021 |
* 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 |
|---|---|---|---|---|---|---|---|---|
| 18 Feb, 2026 | Jonathan Zalevsky | Common Stock | D | 180 | $73.00 | 21,174 | D | S |
| 18 Feb, 2026 | Howard W Robin | Common Stock | D | 423 | $73.00 | 75,489 | D | S |
| 20 Jan, 2026 | Jonathan Zalevsky | Common Stock | D | 3,867 | $35.67 | 21,354 | D | S |
| 22 Dec, 2025 | Howard W Robin | Common Stock | A | 21,667 | $0.00 | 75,912 | D | A |
| 22 Dec, 2025 | Jonathan Zalevsky | Common Stock | A | 6,250 | $0.00 | 25,221 | D | A |
| 22 Dec, 2025 | Jonathan Zalevsky | Stock Option | A | 25,000 | $0.00 | 25,000 | D | A |
| 22 Dec, 2025 | Howard W Robin | Stock Option | A | 86,667 | $0.00 | 86,667 | D | A |
| 21 Nov, 2025 | Howard W Robin | Common Stock | A | 7,110 | $0.00 | 56,452 | D | A |
| 21 Nov, 2025 | Mark Andrew Wilson | Common Stock | A | 1,903 | $0.00 | 22,215 | D | A |
| 21 Nov, 2025 | Jonathan Zalevsky | Common Stock | A | 2,666 | $0.00 | 20,128 | D | A |
| 25 Nov, 2025 | Mark Andrew Wilson | Common Stock | D | 630 | $54.28 | 21,585 | D | S |
| 25 Nov, 2025 | Howard W Robin | Common Stock | D | 2,207 | $54.28 | 54,245 | D | S |
| 25 Nov, 2025 | Jonathan Zalevsky | Common Stock | D | 1,157 | $54.28 | 18,971 | D | S |
| 21 Nov, 2025 | Mark Andrew Wilson | Stock Option | A | 3,400 | $0.00 | 3,400 | D | A |
| 21 Nov, 2025 | Jonathan Zalevsky | Stock Option | A | 4,766 | $0.00 | 4,766 | D | A |
| 21 Nov, 2025 | Howard W Robin | Stock Option | A | 12,170 | $0.00 | 12,170 | D | A |
| 30 Sep, 2025 | R Scott Greer | Stock Option | A | 8,000 | $0.00 | 8,000 | D | A |
| 30 Sep, 2025 | Robert Chess | Stock Option | A | 8,000 | $0.00 | 8,000 | D | A |
| 30 Sep, 2025 | Roy A Whitfield | Stock Option | A | 8,000 | $0.00 | 8,000 | D | A |
| 30 Sep, 2025 | Jeffrey Robert Ajer | Stock Option | A | 8,000 | $0.00 | 8,000 | D | A |