EIM
INSM icon

Essex Investment Management’s Insmed INSM Stock Holding History

Essex Investment Management’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 		$4.58M Sell
42,991
-19,685
-31% -$2.38M 0.6% 60
2026
Q1 		$10.2M Buy
62,676
+253
+0.4% +$38.9K 1.62% 9
2025
Q4 		$10.9M Sell
62,423
-24,654
-28% -$4.5M 1.66% 6
2025
Q3 		$12.5M Buy
87,077
+20,732
+31% +$2.54M 1.92% 5
2025
Q2 		$6.68M Sell
66,345
-455
-0.7% -$34.8K 1.21% 16
2025
Q1 		$5.1M Sell
66,800
-530
-0.8% -$40.5K 1.06% 18
2024
Q4 		$4.65M Sell
67,330
-9,863
-13% -$710K 0.84% 34
2024
Q3 		$5.64M Sell
77,193
-25,991
-25% -$1.92M 0.98% 24
2024
Q2 		$6.91M Sell
103,184
-5,445
-5% -$211K 1.29% 11
2024
Q1 		$2.95M Buy
108,629
+622
+0.6% +$17.4K 0.58% 62
2023
Q4 		$3.35M Sell
108,007
-40,412
-27% -$1.05M 0.66% 43
2023
Q3 		$3.75M Buy
148,419
+39,237
+36% +$897K 0.61% 47
2023
Q2 		$2.3M Buy
109,182
+16,022
+17% +$304K 0.32% 106
2023
Q1 		$1.59M Buy
93,160
+17,909
+24% +$348K 0.23% 139
2022
Q4 		$1.5M Buy
75,251
+25,414
+51% +$491K 0.23% 131
2022
Q3 		$1.07M Buy
+49,837
New +$1.19M 0.17% 173
2018
Q4 		– Sell
-22,370
Closed -$452K – 500
2018
Q3 		$452K Buy
+22,370
New +$505K 0.05% 305

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

Essex Investment Management's INSM Position: Q2 2026 in Review

Essex Investment Management reduced its Insmed (INSM) stake by 31% in Q2 2026, selling an estimated $2.38M and leaving 42,991 shares worth $4.58M. The position accounts for 0.6% of the portfolio, ranked #60.

Essex Investment Management first reported a position in INSM in Q3 2018 and has held it in 17 quarters since. The position peaked at $12.5M in Q3 2025. 667 funds tracked by Wall St. Rank hold INSM as of Q2 2026.

  • Essex Investment Management held 42,991 shares of Insmed worth $4.58M as of Q2 2026.
  • Essex Investment Management sold 19,685 Insmed shares in Q2 2026, an estimated $2.38M.
  • Insmed made up 0.6% of Essex Investment Management's portfolio in Q2 2026, its #60 holding.
  • Essex Investment Management first reported a position in Insmed in Q3 2018 and has held it in 17 quarters since.
  • Essex Investment Management's Insmed position peaked at $12.5M in Q3 2025.
  • 667 funds tracked by Wall St. Rank held Insmed as of Q2 2026.

Based on Essex Investment Management's 13F filing for Q2 2026, filed 6 Aug 2026.