Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
207 institutional managers reported holding NKTR for the quarter ended Mar 31, 2026. Reported positions total over 95% of shares outstanding; the top 10 hold 59%. 64 opened new positions; 36 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| FMR (Fidelity) | 4.30M | 17.40% | $309.5M | added +4155.1% | 2014 Q3 |
| BVF INC/IL (focused) | 2.56M | 10.35% | $184.1M | added +64.1% | 2025 Q3 |
| Two Seas Capital LP (focused) | 1.96M | 7.92% | $140.9M | added +162.9% | 2025 Q4 |
| Vanguard Group | 1.48M | 5.97% | $106.2M | added +43.7% | ≤2013 |
| Two Sigma | 930.7k | 3.76% | $66.9M | added +96.8% | 2018 Q2 |
| Prosight Management, LP (focused) | 735.0k | 2.97% | $52.9M | added +32.5% | 2025 Q4 |
| BlackRock | 692.6k | 2.80% | $49.8M | added +7.3% | ≤2013 |
| Morgan Stanley | 659.4k | 2.67% | $47.4M | added +16.4% | ≤2013 |
| Armistice Capital, LLC | 578.0k | 2.34% | $41.6M | trimmed -3% | 2024 Q2 |
| Invesco | 567.5k | 2.29% | $40.8M | added +21.2% | ≤2013 |
| Citadel Advisors | 513.5k | 2.08% | $36.9M | added +65.8% | 2016 Q3 |
| Sofinnova Investments, INC. | 509.5k | 2.06% | $36.6M | added +16.2% | 2025 Q3 |
| Woodline Partners LP | 415.3k | 1.68% | $29.9M | added +299.4% | 2024 Q2 |
| Lord, Abbett & CO. LLC | 405.1k | 1.64% | $29.1M | opened | 2026 Q1 |
| Millennium Management | 404.3k | 1.63% | $29.1M | trimmed -11% | 2019 Q3 |
| Emerald Advisers, LLC | 394.6k | 1.59% | $28.4M | added +2.7% | 2025 Q3 |
| Qube Research & Technologies LTD | 390.7k | 1.58% | $28.1M | added +20.6% | 2025 Q3 |
| UBS | 354.2k | 1.43% | $25.5M | added +16.6% | ≤2013 |
| Geode Capital | 346.8k | 1.40% | $24.9M | added +36.3% | ≤2013 |
| Great Point Partners LLC (focused) | 316.5k | 1.28% | $22.8M | added +50.2% | 2025 Q3 |
| Vestal Point Capital, LP | 285.0k | 1.15% | $20.5M | opened | 2026 Q1 |
| 22nw, LP (focused) | 281.1k | 1.14% | $20.2M | trimmed -15.1% | 2024 Q4 |
| PRIMECAP Management | 279.1k | 1.13% | $20.1M | unchanged | ≤2013 |
| Orbimed Advisors LLC | 275.0k | 1.11% | $19.8M | opened | 2026 Q1 |
| Gilder Gagnon Howe & CO LLC | 271.8k | 1.10% | $19.5M | added +30.5% | 2025 Q1 |
| Nearwater Capital Markets, LTD | 261.5k | 1.06% | $18.8M | added +325.2% | 2025 Q4 |
| Emerald Mutual Fund Advisers Trust | 256.1k | 1.03% | $18.4M | added +1.2% | 2025 Q3 |
| Susquehanna International Group | 249.1k | 1.01% | $17.9M | trimmed -35% | ≤2013 |
| State Street | 244.7k | 0.99% | $17.6M | added +25.1% | ≤2013 |
| Braidwell LP | 222.7k | 0.90% | $16.0M | opened | 2026 Q1 |
| Patient Square Capital LP (focused) | 210.0k | 0.85% | $15.1M | opened | 2026 Q1 |
| Bronte Capital Management Pty LTD. | 198.3k | 0.80% | $14.3M | opened | 2026 Q1 |
| Quinn Opportunity Partners LLC | 179.2k | 0.72% | $12.9M | added +108.7% | 2025 Q3 |
| Charles Schwab Investment Management | 168.0k | 0.68% | $12.1M | added +39.6% | ≤2013 |
| Dafna Capital Management LLC | 165.2k | 0.67% | $11.9M | added +120.2% | 2025 Q2 |
| Adar1 Capital Management, LLC | 161.3k | 0.65% | $11.6M | added +123.9% | 2024 Q3 |
| Marshall Wace | 140.6k | 0.57% | $10.1M | added +485.2% | 2025 Q2 |
| Ameriprise Financial INC | 136.7k | 0.55% | $9.8M | opened | 2026 Q1 |
| Goldman Sachs | 126.9k | 0.51% | $9.1M | trimmed -14.1% | ≤2013 |
| Creek Drive Management Group LLC (focused) | 126.4k | 0.51% | $9.1M | trimmed -31.9% | 2025 Q4 |
| Squadron Capital Management LLC (focused) | 125.0k | 0.51% | $9.0M | opened | 2026 Q1 |
| Seven Grand Managers, LLC | 125.0k | 0.51% | $9.0M | opened | 2026 Q1 |
| Nationale-Nederlanden Powszechne Towarzystwo Emerytalne S.a. | 122.3k | 0.49% | $8.8M | trimmed -35% | 2025 Q3 |
| BNP Paribas Financial Markets | 121.9k | 0.49% | $8.8M | trimmed -42.1% | ≤2013 |
| Jane Street | 112.7k | 0.46% | $8.1M | trimmed -48.4% | 2025 Q4 |
| Squarepoint Ops LLC | 107.4k | 0.43% | $7.7M | added +430.1% | 2025 Q3 |
| Russell Investments Group, LTD. | 106.2k | 0.43% | $7.6M | added +24% | 2016 Q4 |
| Tetragon Partners GP LTD (focused) | 103.0k | 0.42% | $7.4M | added +48.7% | 2025 Q4 |
| Monashee Investment Management LLC (focused) | 100.0k | 0.40% | $7.2M | added +6.2% | 2025 Q4 |
| ING Groep NV | 100.0k | 0.40% | $7.2M | unchanged | 2025 Q4 |
Largest 50 of 207 shown; the full ranked, searchable register is at boothcheck.com/holders/NKTR. Related filers are grouped using the filings' own included-manager declarations. Historically, several managers opening new positions in the same quarter said almost nothing about the quarter that followed (59,118 cases since 2013). A filed record, not a forecast. Nothing here is investment advice.