Who Owns IONIS PHARMACEUTICALS INC (IONS)? -- Institutional Holders (2026-06-30)
575 institutions reported holding $15.92B of IONIS PHARMACEUTICALS INC (IONS) in SEC 13F filings for 2026-06-30. Largest institutional holders: FMR LLC ($1.96B), Capital World Investors ($1.72B), VANGUARD GROUP INC ($1.30B), BlackRock, Inc. ($866.5M), WELLINGTON MANAGEMENT GROUP LLP ($624.6M). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|
| 1 | FMR LLC | $1.96B | 24.6M | Added |
| 2 | Capital World Investors | $1.72B | 21.7M | Added |
| 3 | VANGUARD GROUP INC | $1.30B | 16.4M | Added |
| 4 | BlackRock, Inc. | $866.5M | 10.7M | Trimmed |
| 5 | WELLINGTON MANAGEMENT GROUP LLP | $624.6M | 7.7M | Trimmed |
| 6 | TWO SIGMA INVESTMENTS, LP | $495.7M | 6.3M | Added |
| 7 | Royal Bank of Canada | $490.4M | 6.2M | Added |
| 8 | STATE STREET CORP | $367.1M | 4.3M | Added |
| 9 | T. Rowe Price Investment Management, Inc. | $313.9M | 4.0M | Trimmed |
| 10 | GEODE CAPITAL MANAGEMENT, LLC | $294.8M | 3.6M | Trimmed |
| 11 | PRICE T ROWE ASSOCIATES INC /MD/ | $252.5M | 3.2M | Added |
| 12 | DEERFIELD MANAGEMENT COMPANY, L.P. | $250.1M | 2.0M | Hold |
| 13 | JPMORGAN CHASE & CO | $243.7M | 3.0M | Trimmed |
| 14 | Artisan Partners Limited Partnership | $209.3M | 2.6M | Added |
| 15 | CITADEL ADVISORS LLC | $202.5M | 855,284 | Added |
| 16 | Tweedy, Browne Co LLC | $180.8M | 2.3M | Added |
| 17 | UBS AM, A DISTINCT BUSINESS UNIT OF UBS ASSET MANAGEMENT AMERICAS LLC | $179.2M | 1.5M | Added |
| 18 | Deep Track Capital, LP | $174.4M | 2.2M | Added |
| 19 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | $168.6M | 2.1M | Added |
| 20 | GOLDMAN SACHS GROUP INC | $167.3M | 2.1M | Trimmed |
| 21 | BAKER BROS. ADVISORS LP | $162.4M | 2.0M | Hold |
| 22 | AMERICAN CENTURY COMPANIES INC | $154.4M | 1.9M | Added |
| 23 | TENOR CAPITAL MANAGEMENT Co., L.P. | $147.8M | 0 | Added |
| 24 | BARCLAYS PLC | $131.5M | 1.7M | Added |
| 25 | FRANKLIN RESOURCES INC | $128.7M | 1.6M | Added |
Source: SEC Form 13F filings · as of 2026-06-30