Hudson Bay Capital Management
INSM icon

Hudson Bay Capital Management’s Insmed INSM Stock Holding History

Hudson Bay Capital 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
2025
Q1 		– Sell
-85,000
Closed -$5.87M – 1390
2024
Q4 		$5.87M Buy
+85,000
New +$6.12M 0.02% 470
2024
Q3 		– Sell
-50,000
Closed -$3.35M – 948
2024
Q2 		$3.35M Hold
50,000
– – 0.02% 453
2024
Q1 		$1.36M Hold
50,000
– – 0.01% 515
2023
Q4 		$1.55M Hold
50,000
– – 0.01% 482
2023
Q3 		$1.26M Buy
+50,000
New +$1.14M 0.01% 535

Other funds holding INSM

JP Morgan Chase
JP Morgan Chase New York $1.56T AUM 27.86% 1-Year Est. Return
DGM
Darwin Global Management St. Helier, Jersey $3.77B AUM 307.72% 1-Year Est. Return
Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
Capital International Investors
Capital International Investors Los Angeles, California $427B AUM 29.17% 1-Year Est. Return
T. Rowe Price Associates
T. Rowe Price Associates Baltimore, Maryland $865B AUM 30.76% 1-Year Est. Return
BBA
Baker Bros. Advisors New York $17.4B AUM 131.5% 1-Year Est. Return
D.E. Shaw & Co
D.E. Shaw & Co New York $166B AUM 43.98% 1-Year Est. Return
Artisan Partners
Artisan Partners Milwaukee, Wisconsin $62.3B AUM 26.25% 1-Year Est. Return

Hudson Bay Capital Management's INSM Position: Q3 2025 in Review

Hudson Bay Capital Management sold out of Insmed (INSM) in Q3 2025, closing a stake of 81,743 shares — an estimated $8.23M sold.

Hudson Bay Capital Management first reported a position in INSM in Q1 2017 and held it in 29 quarters. The position peaked at $35.9M in Q2 2023. 566 funds tracked by Wall St. Rank hold INSM as of Q3 2025.

  • Hudson Bay Capital Management reported no remaining Insmed position as of Q3 2025 after selling out during the quarter.
  • Hudson Bay Capital Management sold 81,743 Insmed shares in Q3 2025, an estimated $8.23M.
  • Hudson Bay Capital Management first reported a position in Insmed in Q1 2017 and held it in 29 quarters.
  • Hudson Bay Capital Management's Insmed position peaked at $35.9M in Q2 2023.
  • 566 funds tracked by Wall St. Rank held Insmed as of Q3 2025.

Based on Hudson Bay Capital Management's 13F filing for Q3 2025, filed 13 Nov 2025.