Brown Advisory
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Brown Advisory’s Ionis Pharmaceuticals IONS Stock Holding History

Brown Advisory’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 		$1.13M Buy
15,105
+140
+0.9% +$11K ﹤0.01% 810
2025
Q4 		$1.18M Buy
14,965
+939
+7% +$70.7K ﹤0.01% 798
2025
Q3 		$918K Buy
14,026
+1,835
+15% +$89.6K ﹤0.01% 852
2025
Q2 		$482K Buy
12,191
+165
+1% +$5.4K ﹤0.01% 1024
2025
Q1 		$363K Sell
12,026
-704
-6% -$23.1K ﹤0.01% 1079
2024
Q4 		$445K Sell
12,730
-16
-0.1% -$598 ﹤0.01% 1050
2024
Q3 		$511K Buy
12,746
+1,780
+16% +$82.8K ﹤0.01% 991
2024
Q2 		$523K Sell
10,966
-156
-1% -$6.4K ﹤0.01% 947
2024
Q1 		$482K Sell
11,122
-422
-4% -$20.1K ﹤0.01% 954
2023
Q4 		$584K Sell
11,544
-181
-2% -$8.67K ﹤0.01% 894
2023
Q3 		$532K Buy
11,725
+138
+1% +$5.69K ﹤0.01% 890
2023
Q2 		$475K Buy
11,587
+126
+1% +$4.84K ﹤0.01% 920
2023
Q1 		$410K Sell
11,461
-70
-0.6% -$2.63K ﹤0.01% 964
2022
Q4 		$436K Buy
11,531
+901
+8% +$37.9K ﹤0.01% 939
2022
Q3 		$470K Buy
10,630
+1,000
+10% +$42.1K ﹤0.01% 872
2022
Q2 		$357K Buy
+9,630
New +$363K ﹤0.01% 919
2016
Q2 		– Sell
-5,369
Closed -$218K – 1070
2016
Q1 		$218K Sell
5,369
-11
-0.2% -$447 ﹤0.01% 907
2015
Q4 		$333K Sell
5,380
-467
-8% -$25.2K ﹤0.01% 770
2015
Q3 		$237K Buy
+5,847
New +$303K ﹤0.01% 848
2015
Q2 		– Sell
-5,665
Closed -$361K – 893
2015
Q1 		$361K Buy
5,665
+80
+1% +$5.43K ﹤0.01% 772
2014
Q4 		$345K Buy
+5,585
New +$276K ﹤0.01% 773

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

Brown Advisory's IONS Position: Q1 2026 in Review

Brown Advisory increased its Ionis Pharmaceuticals (IONS) stake by 0.94% in Q1 2026, buying an estimated $11K and bringing the position to 15,105 shares worth $1.13M. The position accounts for ﹤0.01% of the portfolio, ranked #810.

Brown Advisory first reported a position in IONS in Q4 2014 and has held it in 21 quarters since. The position peaked at $1.18M in Q4 2025. 493 funds tracked by Wall St. Rank hold IONS as of Q1 2026.

  • Brown Advisory held 15,105 shares of Ionis Pharmaceuticals worth $1.13M as of Q1 2026.
  • Brown Advisory bought 140 Ionis Pharmaceuticals shares in Q1 2026, an estimated $11K.
  • Ionis Pharmaceuticals made up ﹤0.01% of Brown Advisory's portfolio in Q1 2026, its #810 holding.
  • Brown Advisory first reported a position in Ionis Pharmaceuticals in Q4 2014 and has held it in 21 quarters since.
  • Brown Advisory's Ionis Pharmaceuticals position peaked at $1.18M in Q4 2025.
  • 493 funds tracked by Wall St. Rank held Ionis Pharmaceuticals as of Q1 2026.

Based on Brown Advisory's 13F filing for Q1 2026, filed 15 May 2026.