Position history for BAKER BROS. ADVISORS LP's holdings in IONIS PHARMACEUTICALS INC
BAKER BROS. ADVISORS LP holds 2M shares of IONS (IONIS PHARMACEUTICALS INC), worth $153.8M as of 2026-Q1. The position was increased (+14.3% shares). IONS represents 0.9% of BAKER BROS. ADVISORS LP's portfolio.
Current Value
$153.8M
Current Shares
2M
Total Value Change
+$144.8M
Total Shares Change
+1.8M
Other major holders of IONS: UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC
Increased |
| 2M |
+14.3% |
| $153.8M |
| 0.9% |
| $78.66 |
49 |
| 2025-Q4 | Increased | 1.8M | +216.1% | $141.8M | 0.8% | $78.97 | 69 |
| 2025-Q3 | New | 566,798 | - | $37.1M | 0.3% | $64.15 | 48 |
| 2025-Q2 | Exited | 0 | -100.0% | $0 | 0.0% | $39.80 | 0 |
| 2025-Q1 | Unchanged | 357,915 | 0.0% | $10.8M | 0.1% | $31.15 | 0 |
| 2024-Q4 | Increased | 357,915 | +60.2% | $12.5M | 0.1% | $34.92 | 48 |
| 2024-Q3 | New | 223,470 | - | $9M | 0.1% | $40.85 | 38 |