Based on data from the past 90 days ending January 10, 2026, Nektar Therapeutics's three largest insider shareholders are TenPercentOwner Track Capital, Lp Deep (1.22Mn shares), President & Ceo Howard W Robin (75.91K shares), Chief R&D Officer Jonathan Zalevsky (25.22K shares).
| Holder | Position | Shares | Report Date |
|---|---|---|---|
| Track Capital, Lp Deep | 1,222,994 | 13 May, 2024 | |
| Jillian B. Thomsen | Chief Financial Officer | 20,901 | 17 Feb, 2023 |
| Gil M Labrucherie | Svp And Coo & Cfo | 20,861 | 17 May, 2022 |
| R Scott Greer | 20,239 | 20 Sep, 2022 | |
| Robert Chess | 17,159 | 14 Jun, 2024 | |
| John Northcott | Svp & Chief Commercial Officer | 14,881 | 17 May, 2022 |
| Roy A Whitfield | 14,417 | 15 Jun, 2023 | |
| Howard W Robin | President & Ceo | 75,912 | 23 Dec, 2025 |
| Jeffrey Robert Ajer | 2,277 | 20 Sep, 2023 | |
| Diana Brainard | 1,904 | 20 Sep, 2022 | |
| Myriam Curet | 1,828 | 20 Sep, 2023 | |
| Jonathan Zalevsky | Chief R&D Officer | 25,221 | 23 Dec, 2025 |
| Karin Eastham | 1,549 | 20 Sep, 2022 | |
| Mark Andrew Wilson | Chief Legal Officer | 21,585 | 25 Nov, 2025 |
* 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 |
|---|---|---|---|---|---|---|---|---|
| 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 |
| 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 |
| 25 Nov, 2025 | Mark Andrew Wilson | Common Stock | D | 630 | $54.28 | 21,585 | D | S |
| 21 Nov, 2025 | Howard W Robin | Common Stock | A | 7,110 | $0.00 | 56,452 | 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 |
| 09 Sep, 2025 | Howard W Robin | Common Stock | D | 2,156 | $47.49 | 50,552 | D | S |
| 09 Sep, 2025 | Howard W Robin | Common Stock | D | 2,100 | $45.16 | 53,908 | D | S |
| 09 Sep, 2025 | Howard W Robin | Common Stock | D | 1,210 | $48.18 | 49,342 | D | S |
| 09 Sep, 2025 | Howard W Robin | Common Stock | D | 1,200 | $46.41 | 52,708 | D | S |
| 05 Sep, 2025 | Howard W Robin | Common Stock | D | 3,304 | $37.87 | 59,370 | D | S |
| 05 Sep, 2025 | Howard W Robin | Common Stock | D | 1,136 | $39.89 | 56,008 | D | S |
| 05 Sep, 2025 | Howard W Robin | Common Stock | D | 2,226 | $38.82 | 57,144 | D | S |
| 04 Sep, 2025 | Howard W Robin | Common Stock | D | 1,923 | $32.37 | 65,917 | D | S |
| 04 Sep, 2025 | Howard W Robin | Common Stock | D | 613 | $34.40 | 63,808 | D | S |
| 04 Sep, 2025 | Howard W Robin | Common Stock | D | 1,134 | $35.80 | 62,674 | D | S |
| 04 Sep, 2025 | Howard W Robin | Common Stock | D | 1,496 | $33.54 | 64,421 | D | S |
| 04 Sep, 2025 | Jonathan Zalevsky | Common Stock | D | 189 | $34.41 | 17,769 | D | S |