Nektar Therapeutics
Ownership
Ownership Structure
Who owns Nektar Therapeutics (NKTR)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 83.6% of the shares are freely tradable; institutional investors hold 92.1%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| FMR Inc | 12.60 | 4,303,188 | +4,155.1 | 03/31/2026 |
| Bvf Inc | 7.50 | 2,559,595 | +64.1 | 03/31/2026 |
| Two Seas Capital LP | 5.74 | 1,959,178 | +162.9 | 03/31/2026 |
| Two Sigma Investments LLC | 3.52 | 1,202,004 | +29.1 | 06/30/2026 |
| Vanguard Capital Management, LLC | 3.51 | 1,197,055 | +0.0 | 03/31/2026 |
| Prosight Management, LP | 2.37 | 810,000 | +10.2 | 06/30/2026 |
| BlackRock Inc | 2.03 | 692,650 | +7.3 | 03/31/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Fidelity Growth Company Fund | 5.36 | 1,831,737 | +0.0 | 07/31/2026 |
| Vanguard MStar Total Stk Mkt Idx Invest | 3.16 | 1,077,897 | -0.1 | 08/31/2026 |
| iShares Russell 2000 ETF | 2.59 | 882,671 | -0.6 | 08/31/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider holdings
| Person | Role | Shares | Value | As of | Type |
|---|---|---|---|---|---|
| Robin Howard W | President & CEO | 54,627 | 3,119,202 $ | Aug 18, 2026 | direct |
| Greer R Scott | Director | 22,239 | 1,269,847 $ | Sep 23, 2026 | direct |
| Chess Robert | Director | 19,019 | 1,085,985 $ | Sep 23, 2026 | direct |
| Whitfield Roy A | Director | 16,417 | 937,411 $ | Sep 23, 2026 | direct |
| Zalevsky Jonathan | Chief R&D Officer | 9,570 | 546,447 $ | Aug 18, 2026 | direct |
| Ajer Jeffrey Robert | Director | 4,277 | 244,217 $ | Sep 23, 2026 | direct |
| Brainard Diana | Director | 3,904 | 222,918 $ | Sep 23, 2026 | direct |
Holdings as of each person's most recent SEC Form 4 filing — excluding options and RSUs, which are not shares yet. Holdings may have changed between two filings.
Insiders
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Sep 23, 2026 | Whitfield Roy A | Director | Other | 2,000 | 0.00 | – |
| Sep 23, 2026 | Greer R Scott | Director | Other | 2,000 | 0.00 | – |
| Sep 23, 2026 | Chess Robert | Director | Other | 2,000 | 0.00 | – |
| Sep 23, 2026 | Brainard Diana | Director | Other | 2,000 | 0.00 | – |
| Sep 23, 2026 | Ajer Jeffrey Robert | Director | Other | 2,000 | 0.00 | – |
| Aug 18, 2026 | Zalevsky Jonathan | Chief R&D Officer | Sell | 186 | 71.98 | 13,388 |
| Aug 18, 2026 | Robin Howard W | President & CEO | Sell | 418 | 71.98 | 30,088 |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character. View all insider transactions →
Data as of: September 25, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.