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Thomas Steyer’s Insmed INSM Stock Holding History

Thomas Steyer’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
Q1 		– Sell
-250,000
Closed -$43.5M – 189
2025
Q4 		$43.5M Buy
+250,000
New +$45.6M 0.19% 57

Other funds holding INSM

JP Morgan Chase
JP Morgan Chase New York $1.81T AUM 41.13% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
DGM
Darwin Global Management St. Helier, Jersey $3.76B AUM 342.13% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
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
Artisan Partners
Artisan Partners Milwaukee, Wisconsin $63.1B AUM 35.51% 1-Year Est. Return
Invesco
Invesco Atlanta, Georgia $1.26T AUM 61.52% 1-Year Est. Return
D.E. Shaw & Co
D.E. Shaw & Co New York $210B AUM 57.28% 1-Year Est. Return

Thomas Steyer's INSM Position: Q1 2026 in Review

Thomas Steyer sold out of Insmed (INSM) in Q1 2026, closing a stake of 3,000 shares — an estimated $522K sold.

Thomas Steyer first reported a position in INSM in Q2 2024 and held it in 7 quarters. The position peaked at $38.1M in Q2 2024. 673 funds tracked by Wall St. Rank hold INSM as of Q1 2026.

  • Thomas Steyer reported no remaining Insmed position as of Q1 2026 after selling out during the quarter.
  • Thomas Steyer sold 3,000 Insmed shares in Q1 2026, an estimated $522K.
  • Thomas Steyer first reported a position in Insmed in Q2 2024 and held it in 7 quarters.
  • Thomas Steyer's Insmed position peaked at $38.1M in Q2 2024.
  • 673 funds tracked by Wall St. Rank held Insmed as of Q1 2026.

Based on Farallon Capital Management's 13F filing for Q1 2026, filed 15 May 2026.