Mariner
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Mariner’s Ionis Pharmaceuticals IONS Stock Holding History

Mariner’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 		– Sell
-47,740
Closed -$3.78M – 3692
2025
Q4 		$3.78M Buy
47,740
+23,513
+97% +$1.77M ﹤0.01% 1147
2025
Q3 		$1.58M Sell
24,227
-12,687
-34% -$619K ﹤0.01% 1578
2025
Q2 		$1.46M Buy
36,914
+3,431
+10% +$112K ﹤0.01% 1539
2025
Q1 		$1.01M Buy
33,483
+5,822
+21% +$191K ﹤0.01% 1681
2024
Q4 		$967K Buy
27,661
+4,534
+20% +$169K ﹤0.01% 1673
2024
Q3 		$928K Buy
23,127
+1,273
+6% +$59.2K ﹤0.01% 1670
2024
Q2 		$1.04M Buy
21,854
+1,070
+5% +$43.9K ﹤0.01% 1477
2024
Q1 		$901K Buy
20,784
+112
+0.5% +$5.34K ﹤0.01% 1576
2023
Q4 		$1.05M Buy
20,672
+2,784
+16% +$133K ﹤0.01% 1399
2023
Q3 		$811K Buy
17,888
+514
+3% +$21.2K ﹤0.01% 1445
2023
Q2 		$713K Buy
17,374
+10,853
+166% +$417K ﹤0.01% 1507
2023
Q1 		$233K Sell
6,521
-11,021
-63% -$414K ﹤0.01% 2278
2022
Q4 		$663K Buy
17,542
+10,401
+146% +$437K ﹤0.01% 1481
2022
Q3 		$316K Buy
+7,141
New +$301K ﹤0.01% 1732
2019
Q3 		– Sell
-3,297
Closed -$212K – 855
2019
Q2 		$212K Buy
3,297
+64
+2% +$4.52K ﹤0.01% 1024
2019
Q1 		$262K Sell
3,233
-2,477
-43% -$160K ﹤0.01% 857
2018
Q4 		$309K Buy
+5,710
New +$291K 0.01% 663

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
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Wellington Management Group
Wellington Management Group Boston, Massachusetts $580B AUM 38.23% 1-Year Est. Return
T. Rowe Price Investment Management
T. Rowe Price Investment Management Baltimore, Maryland $153B AUM 38.14% 1-Year Est. Return
Two Sigma Investments
Two Sigma Investments New York $138B AUM 41.87% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

Mariner's IONS Position: Q1 2026 in Review

Mariner sold out of Ionis Pharmaceuticals (IONS) in Q1 2026, closing a stake of 47,740 shares — an estimated $3.78M sold.

Mariner first reported a position in IONS in Q4 2018 and held it in 17 quarters. The position peaked at $3.78M in Q4 2025. 497 funds tracked by Wall St. Rank hold IONS as of Q1 2026.

  • Mariner reported no remaining Ionis Pharmaceuticals position as of Q1 2026 after selling out during the quarter.
  • Mariner sold 47,740 Ionis Pharmaceuticals shares in Q1 2026, an estimated $3.78M.
  • Mariner first reported a position in Ionis Pharmaceuticals in Q4 2018 and held it in 17 quarters.
  • Mariner's Ionis Pharmaceuticals position peaked at $3.78M in Q4 2025.
  • 497 funds tracked by Wall St. Rank held Ionis Pharmaceuticals as of Q1 2026.

Based on Mariner's 13F filing for Q1 2026, filed 13 May 2026.