SEC Form 4 · Updated Daily
NKTR
— NEKTAR THERAPEUTICS OwnershipInsider and institutional ownership derived from SEC Form 4 filings. Click any owner to see their holdings across every company they’ve filed on, and how their position has changed over time.
Current Reporting Owners
| Owner | Role | Shares Owned | As Of | Last Activity |
|---|---|---|---|---|
| KROIN DAVID | 10%+ Owner | 18,344,000 | 2024-05-10 | S |
| Deep Track Capital, LP | 10%+ Owner | 18,344,000 | 2024-05-10 | S |
| Deep Track Biotechnology Master Fund, Ltd. | 10%+ Owner | 18,344,000 | 2024-05-10 | S |
| Labrucherie Gil M | Officer | 330,353 | 2022-05-15 | A |
| PATTON JOHN STUART | Director | 314,640 | 2008-11-14 | M |
| Thomsen Jillian B. | Officer | 313,497 | 2023-02-16 | S |
| NORTHCOTT JOHN | Officer | 223,210 | 2022-05-16 | S |
| Nicholson John | Officer | 162,759 | 2019-08-16 | S |
| Doberstein Stephen K | Officer | 107,668 | 2019-09-05 | P |
| Hora Maninder | Officer | 94,694 | 2019-05-16 | S |
| GILL AJIT | Director · Officer | 91,236 | 2006-03-23 | S |
| Krivulka Joseph J | Director | 82,000 | 2017-09-19 | A |
| Gergel Ivan P. | Officer | 61,575 | 2017-11-15 | A |
| WANG SUSAN | Director | 60,000 | 2015-11-20 | M |
| WINGER DENNIS L | Director | 57,750 | 2018-08-21 | M |
| ROBIN HOWARD W | Director · Officer | 54,627 | 2026-08-18 | S |
| KUEBLER CHRISTOPHER A | Director | 45,250 | 2018-09-27 | A |
| Lingnau Lutz | Director | 35,800 | 2020-09-22 | A |
| Curet Myriam | Officer | 27,418 | 2023-09-18 | S |
| EASTHAM KARIN | Director | 23,233 | 2022-09-16 | A |
| GREER R SCOTT | Director | 22,239 | 2026-09-23 | A |
| Wilson Mark Andrew | Officer | 22,215 | 2025-11-21 | A |
| CHESS ROBERT | Director | 19,019 | 2026-09-23 | A |
| WHITFIELD ROY A | Director | 16,417 | 2026-09-23 | A |
| BANSAL AJAY | Officer | 10,233 | 2006-03-10 | S |
| BROWN MICHAEL A/CA | Director · Officer | 10,000 | 2008-11-14 | M |
| LERNER IRWIN | Director | 10,000 | 2008-11-14 | M |
| Ghosh Rinko | Officer | 9,753 | 2011-03-07 | M |
| Zalevsky Jonathan | Officer | 9,570 | 2026-08-18 | S |
| Huh Hoyoung | Director | 8,000 | 2007-05-18 | — |
| Johnston David | Officer | 6,600 | 2007-05-14 | A |
| DRAPEAU LOUIS | Officer | 6,000 | 2007-05-14 | A |
| Ajer Jeffrey Robert | Director | 4,277 | 2026-09-23 | A |
| HARKNESS TIMOTHY | Officer | 4,000 | 2007-08-23 | — |
| Brainard Diana | Director | 3,904 | 2026-09-23 | A |
| Elam Nevan C | Officer | 1,400 | 2007-05-14 | A |
Recent Filings
| Date | Owner | Activity | Shares | Price | Owned After |
|---|---|---|---|---|---|
| 2026-09-23 | Ajer Jeffrey Robert | Grant / award (derivative) | 4,000 | $0.00 | 4,000 |
| 2026-09-23 | Ajer Jeffrey Robert | Grant / award | 2,000 | $0.00 | 4,277 |
| 2026-09-23 | Brainard Diana | Grant / award (derivative) | 4,000 | $0.00 | 4,000 |
| 2026-09-23 | Brainard Diana | Grant / award | 2,000 | $0.00 | 3,904 |
| 2026-09-23 | CHESS ROBERT | Grant / award (derivative) | 4,000 | $0.00 | 4,000 |
| 2026-09-23 | CHESS ROBERT | Grant / award | 2,000 | $0.00 | 19,019 |
| 2026-09-23 | GREER R SCOTT | Grant / award (derivative) | 4,000 | $0.00 | 4,000 |
| 2026-09-23 | GREER R SCOTT | Grant / award | 2,000 | $0.00 | 22,239 |
| 2026-09-23 | WHITFIELD ROY A | Grant / award (derivative) | 4,000 | $0.00 | 4,000 |
| 2026-09-23 | WHITFIELD ROY A | Grant / award | 2,000 | $0.00 | 16,417 |
| 2026-08-18 | ROBIN HOWARD W | Open-market sale | 418 | $71.98 | 54,627 |
| 2026-08-18 | Zalevsky Jonathan | Open-market sale | 186 | $71.98 | 9,570 |
| 2026-07-24 | ROBIN HOWARD W | Grant / award (derivative) | 57,200 | $0.00 | 57,200 |
| 2026-07-24 | Zalevsky Jonathan | Grant / award (derivative) | 16,500 | $0.00 | 16,500 |
| 2026-06-30 | Zalevsky Jonathan | Open-market sale | 5,681 | $70.00 | 9,756 |
| 2026-06-17 | ROBIN HOWARD W | Open-market sale | 4,500 | $61.65 | 55,045 |
| 2026-06-17 | ROBIN HOWARD W | Open-market sale | 5,500 | $60.81 | 59,545 |
| 2026-06-16 | ROBIN HOWARD W | Open-market sale | 4,697 | $60.71 | 65,045 |
| 2026-06-16 | ROBIN HOWARD W | Open-market sale | 5,303 | $59.97 | 69,742 |
| 2026-06-15 | Zalevsky Jonathan | Open-market sale | 5,538 | $60.71 | 15,437 |
| 2026-05-19 | ROBIN HOWARD W | Open-market sale | 444 | $65.51 | 75,045 |
| 2026-05-19 | Zalevsky Jonathan | Open-market sale | 199 | $65.51 | 20,975 |
| 2026-02-18 | ROBIN HOWARD W | Open-market sale | 423 | $73.00 | 75,489 |
| 2026-02-18 | Zalevsky Jonathan | Open-market sale | 180 | $73.00 | 21,174 |
| 2026-01-20 | Zalevsky Jonathan | Open-market sale | 3,867 | $35.67 | 21,354 |
| 2025-12-22 | ROBIN HOWARD W | Grant / award (derivative) | 86,667 | $0.00 | 86,667 |
| 2025-12-22 | ROBIN HOWARD W | Grant / award | 21,667 | $0.00 | 75,912 |
| 2025-12-22 | Zalevsky Jonathan | Grant / award (derivative) | 25,000 | $0.00 | 25,000 |
| 2025-12-22 | Zalevsky Jonathan | Grant / award | 6,250 | $0.00 | 25,221 |
| 2025-11-25 | ROBIN HOWARD W | Open-market sale | 2,207 | $54.28 | 54,245 |
| 2025-11-25 | Wilson Mark Andrew | Open-market sale | 630 | $54.28 | 21,585 |
| 2025-11-25 | Zalevsky Jonathan | Open-market sale | 1,157 | $54.28 | 18,971 |
| 2025-11-21 | ROBIN HOWARD W | Grant / award (derivative) | 12,170 | $0.00 | 12,170 |
| 2025-11-21 | ROBIN HOWARD W | Grant / award | 7,110 | $0.00 | 56,452 |
| 2025-11-21 | Wilson Mark Andrew | Grant / award (derivative) | 3,400 | $0.00 | 3,400 |
| 2025-11-21 | Wilson Mark Andrew | Grant / award | 1,903 | $0.00 | 22,215 |
| 2025-11-21 | Zalevsky Jonathan | Grant / award (derivative) | 4,766 | $0.00 | 4,766 |
| 2025-11-21 | Zalevsky Jonathan | Grant / award | 2,666 | $0.00 | 20,128 |
| 2025-09-30 | Ajer Jeffrey Robert | Grant / award (derivative) | 8,000 | $0.00 | 8,000 |
| 2025-09-30 | Brainard Diana | Grant / award (derivative) | 8,000 | $0.00 | 8,000 |
Source: SEC EDGAR Form 4 filings. For informational purposes only — not investment advice.