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S&CO Inc’s Insmed INSM Stock Holding History

S&CO Inc’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 		$1.39M Buy
13,000
+4,700
+57% +$569K 0.08% 130
2026
Q1 		$1.36M Hold
8,300
– – 0.08% 127
2025
Q4 		$1.44M Hold
8,300
– – 0.09% 124
2025
Q3 		$1.2M Hold
8,300
– – 0.07% 136
2025
Q2 		$835K Buy
+8,300
New +$635K 0.05% 153

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

S&CO Inc's INSM Position: Q2 2026 in Review

S&CO Inc increased its Insmed (INSM) stake by 57% in Q2 2026, buying an estimated $569K and bringing the position to 13,000 shares worth $1.39M. The position accounts for 0.08% of the portfolio, ranked #130.

S&CO Inc first reported a position in INSM in Q2 2025 and has held it in 5 quarters since. The position peaked at $1.44M in Q4 2025. 666 funds tracked by Wall St. Rank hold INSM as of Q2 2026.

  • S&CO Inc held 13,000 shares of Insmed worth $1.39M as of Q2 2026.
  • S&CO Inc bought 4,700 Insmed shares in Q2 2026, an estimated $569K.
  • Insmed made up 0.08% of S&CO Inc's portfolio in Q2 2026, its #130 holding.
  • S&CO Inc first reported a position in Insmed in Q2 2025 and has held it in 5 quarters since.
  • S&CO Inc's Insmed position peaked at $1.44M in Q4 2025.
  • 666 funds tracked by Wall St. Rank held Insmed as of Q2 2026.

Based on S&CO Inc's 13F filing for Q2 2026, filed 6 Aug 2026.