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Deep Track Capital’s Ionis Pharmaceuticals IONS Stock Holding History

Deep Track Capital’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 		$146M Buy
1,950,000
+250,000
+15% +$19.7M 2.39% 12
2025
Q4 		$134M Sell
1,700,000
-2,108,144
-55% -$159M 2.4% 14
2025
Q3 		$249M Sell
3,808,144
-1,083,400
-22% -$52.9M 6.95% 2
2025
Q2 		$193M Buy
4,891,544
+327,337
+7% +$10.7M 6.2% 2
2025
Q1 		$138M Buy
4,564,207
+2,630,279
+136% +$86.1M 4.46% 6
2024
Q4 		$67.6M Sell
1,933,928
-266,072
-12% -$9.95M 2.52% 12
2024
Q3 		$88.1M Buy
2,200,000
+200,000
+10% +$9.31M 2.8% 13
2024
Q2 		$95.3M Buy
2,000,000
+626,525
+46% +$25.7M 2.85% 13
2024
Q1 		$59.5M Buy
1,373,475
+124,407
+10% +$5.93M 1.71% 23
2023
Q4 		$63.2M Sell
1,249,068
-1,585,001
-56% -$75.9M 2.11% 18
2023
Q3 		$129M Hold
2,834,069
– – 4.96% 4
2023
Q2 		$116M Hold
2,834,069
– – 5.38% 3
2023
Q1 		$101M Buy
2,834,069
+1,628,296
+135% +$61.1M 4.16% 6
2022
Q4 		$45.5M Buy
+1,205,773
New +$50.7M 1.91% 21

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

Deep Track Capital's IONS Position: Q1 2026 in Review

Deep Track Capital increased its Ionis Pharmaceuticals (IONS) stake by 15% in Q1 2026, buying an estimated $19.7M and bringing the position to 1,950,000 shares worth $146M. The position accounts for 2.39% of the portfolio, ranked #12.

Deep Track Capital first reported a position in IONS in Q4 2022 and has held it in 14 quarters since. The position peaked at $249M in Q3 2025. 494 funds tracked by Wall St. Rank hold IONS as of Q1 2026.

  • Deep Track Capital held 1,950,000 shares of Ionis Pharmaceuticals worth $146M as of Q1 2026.
  • Deep Track Capital bought 250,000 Ionis Pharmaceuticals shares in Q1 2026, an estimated $19.7M.
  • Ionis Pharmaceuticals made up 2.39% of Deep Track Capital's portfolio in Q1 2026, its #12 holding.
  • Deep Track Capital first reported a position in Ionis Pharmaceuticals in Q4 2022 and has held it in 14 quarters since.
  • Deep Track Capital's Ionis Pharmaceuticals position peaked at $249M in Q3 2025.
  • 494 funds tracked by Wall St. Rank held Ionis Pharmaceuticals as of Q1 2026.

Based on Deep Track Capital's 13F filing for Q1 2026, filed 15 May 2026.