SAM
IONS icon

Sectoral Asset Management’s Ionis Pharmaceuticals IONS Stock Holding History

Sectoral Asset Management’s Portfolio IONS Stock Details IONS Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$617K Sell
7,200
-1,165
-14% -$91.9K 0.51% 51
2025
Q4 		$662K Sell
8,365
-840
-9% -$63.3K 0.53% 50
2025
Q3 		$602K Hold
9,205
– – 0.37% 63
2025
Q2 		$364K Sell
9,205
-235
-2% -$7.69K 0.24% 77
2025
Q1 		$285K Buy
9,440
+2,240
+31% +$73.4K 0.22% 65
2024
Q4 		$252K Sell
7,200
-2,240
-24% -$83.7K 0.17% 68
2024
Q3 		$378K Sell
9,440
-220
-2% -$10.2K 0.22% 69
2024
Q2 		$460K Sell
9,660
-440
-4% -$18K 0.19% 67
2024
Q1 		$438K Buy
10,100
+3,620
+56% +$173K 0.17% 75
2023
Q4 		$328K Buy
+6,480
New +$310K 0.14% 90
2023
Q1 		– Sell
-4,450
Closed -$168K – 125
2022
Q4 		$168K Hold
4,450
– – 0.03% 115
2022
Q3 		$197K Hold
4,450
– – 0.04% 102
2022
Q2 		$165K Buy
+4,450
New +$168K 0.03% 106
2020
Q3 		– Sell
-20,100
Closed -$1.19M – 135
2020
Q2 		$1.19M Buy
+20,100
New +$1.12M 0.11% 98
2016
Q2 		– Sell
-433,300
Closed -$17.5M – 70
2016
Q1 		$17.5M Buy
433,300
+283,300
+189% +$11.5M 0.85% 34
2015
Q4 		$9.29M Buy
+150,000
New +$8.09M 0.4% 49
2014
Q2 		– Sell
-882,101
Closed -$38.1M – 69
2014
Q1 		$38.1M Sell
882,101
-340,300
-28% -$16.5M 1.57% 25
2013
Q4 		$48.7M Buy
1,222,401
+781,000
+177% +$27.8M 2.1% 23
2013
Q3 		$16.6M Buy
+441,401
New +$13.2M 0.8% 38

Other funds holding IONS

Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
Capital World Investors
Capital World Investors Los Angeles, California $733B AUM 35.63% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
Wellington Management Group
Wellington Management Group Boston, Massachusetts $535B AUM 26.23% 1-Year Est. Return
T. Rowe Price Investment Management
T. Rowe Price Investment Management Baltimore, Maryland $145B AUM 22.78% 1-Year Est. Return
Two Sigma Investments
Two Sigma Investments New York $124B AUM 33.93% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return

Sectoral Asset Management's IONS Position: Q1 2026 in Review

Sectoral Asset Management reduced its Ionis Pharmaceuticals (IONS) stake by 14% in Q1 2026, selling an estimated $91.9K and leaving 7,200 shares worth $617K. The position accounts for 0.51% of the portfolio, ranked #51.

Sectoral Asset Management first reported a position in IONS in Q3 2013 and has held it in 19 quarters since. The position peaked at $48.7M in Q4 2013. 493 funds tracked by Wall St. Rank hold IONS as of Q1 2026.

  • Sectoral Asset Management held 7,200 shares of Ionis Pharmaceuticals worth $617K as of Q1 2026.
  • Sectoral Asset Management sold 1,165 Ionis Pharmaceuticals shares in Q1 2026, an estimated $91.9K.
  • Ionis Pharmaceuticals made up 0.51% of Sectoral Asset Management's portfolio in Q1 2026, its #51 holding.
  • Sectoral Asset Management first reported a position in Ionis Pharmaceuticals in Q3 2013 and has held it in 19 quarters since.
  • Sectoral Asset Management's Ionis Pharmaceuticals position peaked at $48.7M in Q4 2013.
  • 493 funds tracked by Wall St. Rank held Ionis Pharmaceuticals as of Q1 2026.

Based on Sectoral Asset Management's 13F filing for Q1 2026, filed 15 May 2026.