Capital World Investors 13D and 13G filings for Ionis Pharmaceuticals, Inc.:
- Schedule 13D must be filed within ten days after a person or an organization acquires beneficial ownership of more than 5% of a voting class of a company's equity securities.
- Shares have been adjusted for stock splits.
| Reported DateTime | Transaction Date | Type | Company Symbol | Filed By Symbol | Shares Owned % Owned | Shares Vs. Prev Report | View |
| 2026-05-14 1:55 pm Purchase | 2026-03-31 | 13G | IONIS PHARMACEUTICALS INC IONS | Capital World Investors | 21,186,369 12.800% | 3,225,070 (+17.96%) | Filing |
| 2026-01-07 7:48 pm Purchase | 2025-12-31 | 13G | IONIS PHARMACEUTICALS INC IONS | Capital World Investors | 17,961,299 11.100% | 6,495,886 (+56.66%) | Filing |
| 2025-02-13 4:53 pm Purchase | 2024-12-31 | 13G | IONIS PHARMACEUTICALS INC IONS | Capital World Investors | 11,465,413 7.300% | 11,465,413 (New Position) | Filing |