IONIS PHARMACEUTICALS INC IONS
CIK 0000874015 · CUSIP 462222100
Quarter-end disclosures, not live holdings.
Top 20 institutions
Weight means this stock's share of the manager's own portfolio.
| # | Manager | Value | Manager weight | Change vs prior | Source | |
|---|---|---|---|---|---|---|
| 01 | FMR LLC CIK 315066 · View history | $934.13M 23,642,990 shares | 0.05% | +29.41K(+0.10%)Added | SEC filing ↗ Aug 14, 2025 | ▾ |
| 02 | VANGUARD GROUP INC CIK 102909 · View history | $660.40M 16,714,846 shares | 0.01% | +330.91K(+2.00%)Added | SEC filing ↗ Aug 11, 2025 | ▾ |
| 03 | T. Rowe Price Investment Management, Inc. CIK 1897612 · View history | $634.09M 16,048,721 shares | 0.40% | -126.81K(-0.80%)Reduced | SEC filing ↗ Aug 14, 2025 | ▾ |
| 04 | Capital World Investors CIK 1422849 · View history | $495.46M 12,540,188 shares | 0.07% | +178.19K(+1.40%)Added | SEC filing ↗ Aug 13, 2025 | ▾ |
| 05 | BlackRock, Inc. CIK 2012383 · View history | $430.54M 10,896,937 shares | 0.01% | -367.50K(-3.30%)Reduced | SEC filing ↗ Aug 12, 2025 | ▾ |
| 06 | Bellevue Group AG CIK 1674546 · View history | $310.28M 7,853,198 shares | 6.84% | 0(0.00%)Unchanged | SEC filing ↗ Aug 14, 2025 | ▾ |
| 07 | WELLINGTON MANAGEMENT GROUP LLP CIK 902219 · View history | $250.72M 6,345,776 shares | 0.05% | -2.07M(-24.60%)Reduced | SEC filing ↗ Aug 14, 2025 | ▾ |
| 08 | Deep Track Capital, LP CIK 1856083 · View history | $193.26M 4,891,544 shares | 6.21% | +327.34K(+7.20%)Added | SEC filing ↗ Aug 14, 2025 | ▾ |
| 09 | STATE STREET CORP CIK 93751 · View history | $179.00M 4,530,398 shares | 0.01% | -314.74K(-6.50%)Reduced | SEC filing ↗ Aug 14, 2025 | ▾ |
| 10 | ADAGE CAPITAL PARTNERS GP, L.L.C. CIK 1165408 · View history | $150.14M 3,800,000 shares | 0.25% | +2.72M(+253.30%)Added | SEC filing ↗ Aug 14, 2025 | ▾ |
| 11 | PRICE T ROWE ASSOCIATES INC /MD/ CIK 80255 · View history | $123.51M 3,126,073 shares | 0.01% | -138.96K(-4.30%)Reduced | SEC filing ↗ Aug 14, 2025 | ▾ |
| 12 | Tweedy, Browne Co LLC CIK 732905 · View history | $114.26M 2,891,948 shares | 10.60% | -91.57K(-3.10%)Reduced | SEC filing ↗ Jul 29, 2025 | ▾ |
| 13 | GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history | $114.25M 2,891,095 shares | 0.01% | +48.14K(+1.70%)Added | SEC filing ↗ Aug 8, 2025 | ▾ |
| 14 | TWO SIGMA ADVISERS, LP CIK 1478735 · View history | $105.40M 2,667,611 shares | 0.22% | +575.60K(+27.50%)Added | SEC filing ↗ Aug 14, 2025 | ▾ |
| 15 | MILLENNIUM MANAGEMENT LLC CIK 1273087 · View history | $104.68M 2,649,527 shares | 0.09% | +2.01M(+317.00%)Added | SEC filing ↗ Aug 14, 2025 | ▾ |
| 16 | BVF INC/IL CIK 1056807 · View history | $75.60M 1,913,385 shares | 2.70% | 0(0.00%)Unchanged | SEC filing ↗ Aug 14, 2025 | ▾ |
| 17 | TWO SIGMA INVESTMENTS, LP CIK 1179392 · View history | $70.66M 1,788,367 shares | 0.13% | +102.51K(+6.10%)Added | SEC filing ↗ Aug 14, 2025 | ▾ |
| 18 | UBS Group AG CIK 1610520 · View history | $60.42M 1,529,323 shares | 0.01% | -361.28K(-19.10%)Reduced | SEC filing ↗ Aug 14, 2025 | ▾ |
| 19 | CITADEL ADVISORS LLC CIK 1423053 · View history | $59.07M 1,494,981 shares | 0.05% | -1.99M(-57.00%)Reduced | SEC filing ↗ Aug 14, 2025 | ▾ |
| 20 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC CIK 884546 · View history | $58.78M 1,487,818 shares | 0.01% | +44.19K(+3.10%)Added | SEC filing ↗ Aug 12, 2025 | ▾ |
Showing 20 / 364 institutions. The complete set is available through the API.
Coverage & totals by quarter
Reporting institutions by quarter
Counts also change with data coverage and reporting entities; they do not measure net buying. Distinct managers with a live stock row in this CUSIP; totals may include overlapping filings and are not a share of the company.
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