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Paloma Partners’s Ionis Pharmaceuticals IONS Stock Holding History

Paloma 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
-12,557
Closed -$496K – 96
2025
Q2 		$496K Buy
+12,557
New +$411K 0.07% 90
2024
Q2 		– Sell
-4,909
Closed -$213K – 1352
2024
Q1 		$213K Buy
+4,909
New +$234K 0.01% 594
2020
Q4 		– Sell
-73,486
Closed -$3.49M – 1921
2020
Q3 		$3.49M Buy
73,486
+66,211
+910% +$3.68M 0.09% 224
2020
Q2 		$429K Buy
+7,275
New +$405K 0.01% 1298
2019
Q1 		– Sell
-57,040
Closed -$3.08M – 1800
2018
Q4 		$3.08M Buy
+57,040
New +$2.91M 0.09% 169
2017
Q4 		– Sell
-16,433
Closed -$834K – 2083
2017
Q3 		$834K Sell
16,433
-12,067
-42% -$632K 0.01% 1251
2017
Q2 		$1.45M Buy
28,500
+9,149
+47% +$426K 0.02% 970
2017
Q1 		$778K Sell
19,351
-2,755
-12% -$124K 0.01% 1388
2016
Q4 		$1.06M Buy
+22,106
New +$875K 0.01% 1145
2016
Q1 		– Sell
-64,225
Closed -$3.98M – 1949
2015
Q4 		$3.98M Buy
64,225
+57,417
+843% +$3.1M 0.11% 159
2015
Q3 		$275K Sell
6,808
-143,398
-95% -$7.42M 0.01% 1321
2015
Q2 		$8.65M Buy
150,206
+137,046
+1,041% +$8.71M 0.17% 127
2015
Q1 		$838K Buy
13,160
+9,834
+296% +$667K 0.02% 564
2014
Q4 		$205K Buy
+3,326
New +$164K 0.01% 998
2014
Q3 		– Sell
-75,000
Closed -$2.58M – 1161
2014
Q2 		$2.58M Buy
75,000
+4,921
+7% +$155K 0.11% 183
2014
Q1 		$3.03M Buy
70,079
+20,079
+40% +$973K 0.2% 108
2013
Q4 		$1.99M Buy
50,000
+18,500
+59% +$659K 0.1% 205
2013
Q3 		$1.18M Sell
31,500
-234
-0.7% -$6.99K 0.05% 312
2013
Q2 		$853K Buy
+31,734
New +$675K 0.05% 303

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

Paloma Partners's IONS Position: Q3 2025 in Review

Paloma Partners sold out of Ionis Pharmaceuticals (IONS) in Q3 2025, closing a stake of 12,557 shares — an estimated $496K sold.

Paloma Partners first reported a position in IONS in Q2 2013 and held it in 19 quarters. The position peaked at $8.65M in Q2 2015. 435 funds tracked by Wall St. Rank hold IONS as of Q3 2025.

  • Paloma Partners reported no remaining Ionis Pharmaceuticals position as of Q3 2025 after selling out during the quarter.
  • Paloma Partners sold 12,557 Ionis Pharmaceuticals shares in Q3 2025, an estimated $496K.
  • Paloma Partners first reported a position in Ionis Pharmaceuticals in Q2 2013 and held it in 19 quarters.
  • Paloma Partners's Ionis Pharmaceuticals position peaked at $8.65M in Q2 2015.
  • 435 funds tracked by Wall St. Rank held Ionis Pharmaceuticals as of Q3 2025.

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