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Joel Greenblatt’s Insmed INSM Stock Holding History

Joel Greenblatt’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 		$2.33M Buy
21,893
+11,883
+119% +$1.44M 0.01% 1106
2026
Q1 		$1.64M Sell
10,010
-11,752
-54% -$1.81M 0.01% 1167
2025
Q4 		$3.79M Buy
21,762
+20,113
+1,220% +$3.67M 0.01% 875
2025
Q3 		$237K Buy
+1,649
New +$202K ﹤0.01% 1569

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

Joel Greenblatt's INSM Position: Q2 2026 in Review

Joel Greenblatt increased its Insmed (INSM) stake by 119% in Q2 2026, buying an estimated $1.44M and bringing the position to 21,893 shares worth $2.33M. The position accounts for 0.01% of the portfolio, ranked #1106.

Joel Greenblatt first reported a position in INSM in Q3 2025 and has held it in 4 quarters since. The position peaked at $3.79M in Q4 2025. 663 funds tracked by Wall St. Rank hold INSM as of Q2 2026.

  • Joel Greenblatt held 21,893 shares of Insmed worth $2.33M as of Q2 2026.
  • Joel Greenblatt bought 11,883 Insmed shares in Q2 2026, an estimated $1.44M.
  • Insmed made up 0.01% of Joel Greenblatt's portfolio in Q2 2026, its #1106 holding.
  • Joel Greenblatt first reported a position in Insmed in Q3 2025 and has held it in 4 quarters since.
  • Joel Greenblatt's Insmed position peaked at $3.79M in Q4 2025.
  • 663 funds tracked by Wall St. Rank held Insmed as of Q2 2026.

Based on Gotham Asset Management's 13F filing for Q2 2026, filed 14 Aug 2026.