WP
IONS icon

Woodline Partners’s Ionis Pharmaceuticals IONS Stock Holding History

Woodline Partners’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
-732,813
Closed -$29M – 971
2025
Q2 		$29M Buy
+732,813
New +$24M 0.15% 202
2025
Q1 		– Sell
-107,610
Closed -$3.76M – 962
2024
Q4 		$3.76M Buy
+107,610
New +$4.02M 0.03% 544
2023
Q4 		– Sell
-315,094
Closed -$14.3M – 565
2023
Q3 		$14.3M Sell
315,094
-726,838
-70% -$30M 0.17% 173
2023
Q2 		$42.8M Buy
+1,041,932
New +$40M 0.51% 49
2022
Q4 		– Sell
-406,483
Closed -$18M – 801
2022
Q3 		$18M Buy
406,483
+276,575
+213% +$11.7M 0.25% 118
2022
Q2 		$4.81M Sell
129,908
-62,743
-33% -$2.37M 0.07% 269
2022
Q1 		$7.14M Sell
192,651
-218,803
-53% -$7.16M 0.12% 213
2021
Q4 		$12.5M Buy
411,454
+5,993
+1% +$189K 0.18% 159
2021
Q3 		$13.6M Sell
405,461
-558,327
-58% -$21M 0.22% 126
2021
Q2 		$38.4M Buy
963,788
+487,897
+103% +$19.1M 0.72% 32
2021
Q1 		$21.4M Buy
475,891
+144,514
+44% +$8.06M 0.47% 66
2020
Q4 		$18.7M Buy
+331,377
New +$16.5M 0.5% 62

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

Woodline Partners's IONS Position: Q3 2025 in Review

Woodline Partners sold out of Ionis Pharmaceuticals (IONS) in Q3 2025, closing a stake of 732,813 shares — an estimated $29M sold.

Woodline Partners first reported a position in IONS in Q4 2020 and held it in 12 quarters. The position peaked at $42.8M in Q2 2023. 435 funds tracked by Wall St. Rank hold IONS as of Q3 2025.

  • Woodline Partners reported no remaining Ionis Pharmaceuticals position as of Q3 2025 after selling out during the quarter.
  • Woodline Partners sold 732,813 Ionis Pharmaceuticals shares in Q3 2025, an estimated $29M.
  • Woodline Partners first reported a position in Ionis Pharmaceuticals in Q4 2020 and held it in 12 quarters.
  • Woodline Partners's Ionis Pharmaceuticals position peaked at $42.8M in Q2 2023.
  • 435 funds tracked by Wall St. Rank held Ionis Pharmaceuticals as of Q3 2025.

Based on Woodline Partners's 13F filing for Q3 2025, filed 14 Nov 2025.