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Superstring Capital Management’s Ionis Pharmaceuticals IONS Stock Holding History

Superstring Capital 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
2025
Q3 		– Sell
-98,267
Closed -$3.88M – 37
2025
Q2 		$3.88M Buy
+98,267
New +$3.22M 4.6% 11
2024
Q2 		– Sell
-120,896
Closed -$5.24M – 49
2024
Q1 		$5.24M Sell
120,896
-68,722
-36% -$3.28M 3.47% 10
2023
Q4 		$9.59M Buy
+189,618
New +$9.08M 6.85% 4

Other funds holding IONS

Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return
T. Rowe Price Investment Management
T. Rowe Price Investment Management Baltimore, Maryland $145B AUM 22.78% 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
Wellington Management Group
Wellington Management Group Boston, Massachusetts $535B AUM 26.23% 1-Year Est. Return
BG
Bellevue Group Kuesnacht, Switzerland $4.2B AUM 54.85% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
DTC
Deep Track Capital Greenwich, Connecticut $6.12B AUM 144% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

Superstring Capital Management's IONS Position: Q3 2025 in Review

Superstring Capital Management sold out of Ionis Pharmaceuticals (IONS) in Q3 2025, closing a stake of 98,267 shares — an estimated $3.88M sold.

Superstring Capital Management first reported a position in IONS in Q4 2023 and held it in 3 quarters. The position peaked at $9.59M in Q4 2023. 435 funds tracked by Wall St. Rank hold IONS as of Q3 2025.

  • Superstring Capital Management reported no remaining Ionis Pharmaceuticals position as of Q3 2025 after selling out during the quarter.
  • Superstring Capital Management sold 98,267 Ionis Pharmaceuticals shares in Q3 2025, an estimated $3.88M.
  • Superstring Capital Management first reported a position in Ionis Pharmaceuticals in Q4 2023 and held it in 3 quarters.
  • Superstring Capital Management's Ionis Pharmaceuticals position peaked at $9.59M in Q4 2023.
  • 435 funds tracked by Wall St. Rank held Ionis Pharmaceuticals as of Q3 2025.

Based on Superstring Capital Management's 13F filing for Q3 2025, filed 14 Nov 2025.