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XTX Topco’s Ionis Pharmaceuticals IONS Stock Holding History

XTX Topco’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
Q2 		$4.82M Sell
60,776
-19,743
-25% -$1.49M 0.06% 405
2026
Q1 		$6.05M Buy
80,519
+63,602
+376% +$5.02M 0.11% 201
2025
Q4 		$1.34M Buy
+16,917
New +$1.27M 0.04% 823
2025
Q2 		– Sell
-12,404
Closed -$374K – 2748
2025
Q1 		$374K Sell
12,404
-12,958
-51% -$424K 0.02% 1239
2024
Q4 		$887K Buy
25,362
+8,557
+51% +$320K 0.07% 370
2024
Q3 		$673K Buy
+16,805
New +$782K 0.05% 621
2024
Q2 		– Sell
-8,585
Closed -$372K – 2144
2024
Q1 		$372K Buy
+8,585
New +$409K 0.05% 666
2023
Q4 		– Sell
-16,352
Closed -$742K – 1830
2023
Q3 		$742K Buy
+16,352
New +$675K 0.13% 198

Other funds holding IONS

Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
Capital World Investors
Capital World Investors Los Angeles, California $846B AUM 46.74% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
Wellington Management Group
Wellington Management Group Boston, Massachusetts $580B AUM 38.23% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Two Sigma Investments
Two Sigma Investments New York $138B AUM 41.87% 1-Year Est. Return
Royal Bank of Canada
Royal Bank of Canada Toronto, Ontario, Canada $672B AUM 33.48% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
T. Rowe Price Investment Management
T. Rowe Price Investment Management Baltimore, Maryland $153B AUM 38.14% 1-Year Est. Return

XTX Topco's IONS Position: Q2 2026 in Review

XTX Topco reduced its Ionis Pharmaceuticals (IONS) stake by 25% in Q2 2026, selling an estimated $1.49M and leaving 60,776 shares worth $4.82M. The position accounts for 0.06% of the portfolio, ranked #405.

XTX Topco first reported a position in IONS in Q3 2023 and has held it in 8 quarters since. The position peaked at $6.05M in Q1 2026. 515 funds tracked by Wall St. Rank hold IONS as of Q2 2026.

  • XTX Topco held 60,776 shares of Ionis Pharmaceuticals worth $4.82M as of Q2 2026.
  • XTX Topco sold 19,743 Ionis Pharmaceuticals shares in Q2 2026, an estimated $1.49M.
  • Ionis Pharmaceuticals made up 0.06% of XTX Topco's portfolio in Q2 2026, its #405 holding.
  • XTX Topco first reported a position in Ionis Pharmaceuticals in Q3 2023 and has held it in 8 quarters since.
  • XTX Topco's Ionis Pharmaceuticals position peaked at $6.05M in Q1 2026.
  • 515 funds tracked by Wall St. Rank held Ionis Pharmaceuticals as of Q2 2026.

Based on XTX Topco's 13F filing for Q2 2026, filed 14 Aug 2026.