Jane Street
INSM icon

Jane Street’s Insmed INSM Stock Holding History

Jane Street’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 		$37M Buy
346,800
+237,100
+216% +$28.7M ﹤0.01% 1635
2026
Q1 		$17.9M Sell
109,700
-353,900
-76% -$54.4M ﹤0.01% 1877
2025
Q4 		$80.7M Sell
463,600
-318,800
-41% -$58.2M 0.01% 685
2025
Q3 		$113M Buy
782,400
+44,600
+6% +$5.46M 0.02% 533
2025
Q2 		$74.3M Sell
737,800
-4,200
-0.6% -$321K 0.01% 577
2025
Q1 		$56.6M Buy
742,000
+7,500
+1% +$574K 0.01% 607
2024
Q4 		$50.7M Sell
734,500
-308,300
-30% -$22.2M 0.01% 695
2024
Q3 		$76.1M Sell
1,042,800
-45,600
-4% -$3.37M 0.02% 497
2024
Q2 		$72.9M Buy
1,088,400
+884,400
+434% +$34.3M 0.02% 522
2024
Q1 		$5.53M Buy
204,000
+190,600
+1,422% +$5.33M ﹤0.01% 2479
2023
Q4 		$415K Sell
13,400
-32,400
-71% -$840K ﹤0.01% 7086
2023
Q3 		$1.16M Buy
45,800
+9,300
+25% +$213K ﹤0.01% 4961
2023
Q2 		$770K Buy
+36,500
New +$693K ﹤0.01% 5649
2022
Q4 		– Sell
-54,200
Closed -$1.17M – 9591
2022
Q3 		$1.17M Buy
54,200
+21,600
+66% +$518K ﹤0.01% 5140
2022
Q2 		$643K Buy
+32,600
New +$683K ﹤0.01% 6284
2022
Q1 		– Sell
-32,500
Closed -$885K – 10652
2021
Q4 		$885K Buy
32,500
+22,200
+216% +$635K ﹤0.01% 6148
2021
Q3 		$284K Buy
10,300
+100
+1% +$2.62K ﹤0.01% 8302
2021
Q2 		$290K Sell
10,200
-14,600
-59% -$433K ﹤0.01% 8201
2021
Q1 		$845K Sell
24,800
-8,800
-26% -$336K ﹤0.01% 5777
2020
Q4 		$1.12M Buy
33,600
+2,400
+8% +$87.7K ﹤0.01% 4462
2020
Q3 		$1M Sell
31,200
-30,400
-49% -$874K ﹤0.01% 4095
2020
Q2 		$1.7M Buy
61,600
+39,600
+180% +$939K ﹤0.01% 3288
2020
Q1 		$353K Buy
+22,000
New +$521K ﹤0.01% 4029
2017
Q4 		– Sell
-23,000
Closed -$718K – 4862
2017
Q3 		$718K Buy
+23,000
New +$438K ﹤0.01% 2667

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

Jane Street's INSM Position: Q2 2026 in Review

Jane Street increased its Insmed (INSM) stake by 1,597% in Q2 2026, buying an estimated $22.1M and bringing the position to 193,528 shares worth $20.6M. The position accounts for ﹤0.01% of the portfolio, ranked #2130.

Jane Street first reported a position in INSM in Q2 2013 and has held it in 36 quarters since. The position peaked at $136M in Q2 2025. 665 funds tracked by Wall St. Rank hold INSM as of Q2 2026.

  • Jane Street held 193,528 shares of Insmed worth $20.6M as of Q2 2026.
  • Jane Street bought 182,127 Insmed shares in Q2 2026, an estimated $22.1M.
  • Insmed made up ﹤0.01% of Jane Street's portfolio in Q2 2026, its #2130 holding.
  • Jane Street first reported a position in Insmed in Q2 2013 and has held it in 36 quarters since.
  • Jane Street's Insmed position peaked at $136M in Q2 2025.
  • 665 funds tracked by Wall St. Rank held Insmed as of Q2 2026.

Based on Jane Street's 13F filing for Q2 2026, filed 14 Aug 2026.