Marshall Wace
INSM icon

Marshall Wace’s Insmed INSM Stock Holding History

Marshall Wace’s Portfolio INSM Stock Details INSM Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$53.5M Buy
501,930
+189,365
+61% +$22.9M 0.04% 360
2026
Q1 		$51.1M Sell
312,565
-77,316
-20% -$11.9M 0.05% 357
2025
Q4 		$67.9M Sell
389,881
-268,766
-41% -$49M 0.06% 271
2025
Q3 		$94.9M Sell
658,647
-454,714
-41% -$55.7M 0.1% 177
2025
Q2 		$112M Buy
1,113,361
+417,124
+60% +$31.9M 0.13% 147
2025
Q1 		$53.1M Sell
696,237
-367,978
-35% -$28.1M 0.07% 253
2024
Q4 		$73.5M Buy
1,064,215
+293,004
+38% +$21.1M 0.09% 210
2024
Q3 		$56.3M Sell
771,211
-478,140
-38% -$35.3M 0.07% 249
2024
Q2 		$83.7M Sell
1,249,351
-80,697
-6% -$3.13M 0.11% 169
2024
Q1 		$36.1M Sell
1,330,048
-109,721
-8% -$3.07M 0.06% 331
2023
Q4 		$44.6M Buy
1,439,769
+874,006
+154% +$22.7M 0.08% 258
2023
Q3 		$14.3M Buy
565,763
+119,549
+27% +$2.73M 0.03% 532
2023
Q2 		$9.42M Buy
+446,214
New +$8.47M 0.02% 761
2020
Q4 		– Sell
-26,757
Closed -$860K – 2014
2020
Q3 		$860K Buy
+26,757
New +$769K 0.01% 1075
2020
Q1 		– Sell
-19,977
Closed -$477K – 1844
2019
Q4 		$477K Sell
19,977
-431,473
-96% -$8.78M ﹤0.01% 1189
2019
Q3 		$7.96M Buy
+451,450
New +$8.72M 0.06% 358
2016
Q1 		– Sell
-14,889
Closed -$270K – 1100
2015
Q4 		$270K Buy
+14,889
New +$262K ﹤0.01% 887
2014
Q2 		– Sell
-415,299
Closed -$7.91M – 992
2014
Q1 		$7.91M Buy
+415,299
New +$7.89M 0.14% 177

Other funds holding INSM

Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 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
JP Morgan Chase
JP Morgan Chase New York $1.81T AUM 41.13% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
BBA
Baker Bros. Advisors New York $20B AUM 154.41% 1-Year Est. Return
Capital International Investors
Capital International Investors Los Angeles, California $484B AUM 34.9% 1-Year Est. Return
DGM
Darwin Global Management St. Helier, Jersey $3.76B AUM 342.13% 1-Year Est. Return
Ameriprise
Ameriprise Minneapolis, Minnesota $495B AUM 43.24% 1-Year Est. Return
OAG
Orbis Allan Gray Hamilton, Bermuda $29.1B AUM 60.8% 1-Year Est. Return

Marshall Wace's INSM Position: Q2 2026 in Review

Marshall Wace increased its Insmed (INSM) stake by 61% in Q2 2026, buying an estimated $22.9M and bringing the position to 501,930 shares worth $53.5M. The position accounts for 0.04% of the portfolio, ranked #360.

Marshall Wace first reported a position in INSM in Q1 2014 and has held it in 18 quarters since. The position peaked at $112M in Q2 2025. 666 funds tracked by Wall St. Rank hold INSM as of Q2 2026.

  • Marshall Wace held 501,930 shares of Insmed worth $53.5M as of Q2 2026.
  • Marshall Wace bought 189,365 Insmed shares in Q2 2026, an estimated $22.9M.
  • Insmed made up 0.04% of Marshall Wace's portfolio in Q2 2026, its #360 holding.
  • Marshall Wace first reported a position in Insmed in Q1 2014 and has held it in 18 quarters since.
  • Marshall Wace's Insmed position peaked at $112M in Q2 2025.
  • 666 funds tracked by Wall St. Rank held Insmed as of Q2 2026.

Based on Marshall Wace's 13F filing for Q2 2026, filed 13 Aug 2026.