As of June 18, 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 |
|---|---|---|---|---|
| Roy A Whitfield | - | 216,250 | 0 | 15 Jun, 2023 |
| Howard W Robin | President Ceo | 75,489 | 0 | 20 Feb, 2026 |
| R Scott Greer | - | 303,574 | 0 | 20 Sep, 2022 |
| Robert Chess | Chairman Of The Board | 255,273 | 0 | 14 Jun, 2024 |
| Karin Eastham | - | 23,233 | 0 | 20 Sep, 2022 |
| Gil M Labrucherie | Svp, Coo Cfo | 312,905 | 0 | 17 May, 2022 |
| Jillian B. Thomsen | Chief Financial Officer | 313,497 | 0 | 17 Feb, 2023 |
| Jeffrey Robert Ajer | - | 34,153 | 0 | 20 Sep, 2022 |
| John Northcott | Svp Chief Commercial Officer | 223,210 | 0 | 17 May, 2022 |
| Myriam Curet | - | 27,418 | 0 | 20 Sep, 2023 |
| Jonathan Zalevsky | Chief Rd Officer | 21,174 | 0 | 20 Feb, 2026 |
| Mark Andrew Wilson | Chief Legal Officer | 21,585 | 0 | 25 Nov, 2025 |
| Diana Brainard | - | 28,560 | 0 | 20 Sep, 2022 |
| Track Capital, Lp Deep | - | 0 | 18,344,000 | 13 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 |
|---|---|---|---|---|---|---|---|---|
| 18 Feb, 2026 | Howard W Robin | Common Stock | D | 423 | $73.00 | 75,489 | D | S |
| 18 Feb, 2026 | Jonathan Zalevsky | Common Stock | D | 180 | $73.00 | 21,174 | D | S |
| 18 Feb, 2026 | Jonathan Zalevsky | Common Stock | D | 180 | $73.00 | 21,174 | D | S |
| 20 Jan, 2026 | Jonathan Zalevsky | Common Stock | D | 3,867 | $35.67 | 21,354 | D | S |
| 20 Jan, 2026 | Jonathan Zalevsky | Common Stock | D | 3,867 | $35.67 | 21,354 | D | S |
| 22 Dec, 2025 | Jonathan Zalevsky | Common Stock | A | 6,250 | $0.00 | 25,221 | D | A |
| 22 Dec, 2025 | Jonathan Zalevsky | Common Stock | A | 6,250 | $0.00 | 25,221 | D | A |
| 22 Dec, 2025 | Howard W Robin | Common Stock | A | 21,667 | $0.00 | 75,912 | D | A |
| 22 Dec, 2025 | Jonathan Zalevsky | Stock Option | A | 25,000 | $0.00 | 25,000 | 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 | 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 |
| 21 Nov, 2025 | Jonathan Zalevsky | Common Stock | A | 2,666 | $0.00 | 20,128 | D | A |
| 21 Nov, 2025 | Mark Andrew Wilson | Common Stock | A | 1,903 | $0.00 | 22,215 | D | A |
| 21 Nov, 2025 | Howard W Robin | Common Stock | A | 7,110 | $0.00 | 56,452 | D | A |
| 25 Nov, 2025 | Jonathan Zalevsky | Common Stock | D | 1,157 | $54.28 | 18,971 | D | S |
| 25 Nov, 2025 | Jonathan Zalevsky | Common Stock | D | 1,157 | $54.28 | 18,971 | D | S |
| 25 Nov, 2025 | Mark Andrew Wilson | Common Stock | D | 630 | $54.28 | 21,585 | D | S |
| 25 Nov, 2025 | Mark Andrew Wilson | Common Stock | D | 630 | $54.28 | 21,585 | D | S |