Baker Bros. Advisors LP
- SEC CIK
- 0001263508
- Latest filing
- Aug 14, 2026
IONS holding history
Ionis Pharmaceuticals Inc in every 13F filed by Baker Bros. Advisors LP, including the quarters it was sold out or no filing was made. Changes compare share counts with the previous calendar quarter.
IONS overviewAll 13F holders of IONSFull Q2 2026 holdings
- Shares (Q2 2026)
- 2,047,727
- Value
- $162.4M
- % of portfolio
- 0.8%
- Quarters held
- 7
- Since Q3 2024
| Quarter | Shares | Value | % of portfolio | Share change | Action | All holders |
|---|---|---|---|---|---|---|
| Q2 2026 | 2,047,727 | $162.4M | 0.8% | 00.0% | Unchanged | Holders |
| Q1 2026 | 2,047,727 | $153.8M | 0.9% | +255,886+14.3% | Added | Holders |
| Q4 2025 | 1,791,841 | $141.8M | 0.8% | +1,225,043+216.1% | Added | Holders |
| Q3 2025 | 566,798 | $37.1M | 0.3% | +566,798 | New | Holders |
| Q2 2025 | 0 | $0 | 0.0% | −357,915−100.0% | Sold out | Holders |
| Q1 2025 | 357,915 | $10.8M | 0.1% | 00.0% | Unchanged | Holders |
| Q4 2024 | 357,915 | $12.5M | 0.1% | +134,445+60.2% | Added | Holders |
| Q3 2024 | 223,470 | $8.95M | 0.1% | +223,470 | New | Holders |