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IONS
7 quarters

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

Quarter-by-Quarter History
QuarterActionSharesChangeValueWeightPriceConviction
2026-Q1
Latest
Increased
2M
+14.3%
$153.8M0.9%$78.66
49
2025-Q4
Increased
1.8M
+216.1%
$141.8M0.8%$78.97
69
2025-Q3
New
566,798
-
$37.1M0.3%$64.15
48
2025-Q2
Exited
0
-100.0%
$00.0%$39.80
0
2025-Q1
Unchanged
357,915
0.0%
$10.8M0.1%$31.15
0
2024-Q4
Increased
357,915
+60.2%
$12.5M0.1%$34.92
48
2024-Q3
New
223,470
-
$9M0.1%$40.85
38

Other major holders of IONS: FMR LLC, Capital World Investors

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