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 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

JP Morgan Chase New York $1.56T AUM 27.86% 1-Year Est. Return

BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return

DGM

Darwin Global Management St. Helier, Jersey $3.77B AUM 307.72% 1-Year Est. Return

Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return

VPM

Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

BBA

Baker Bros. Advisors New York $17.4B AUM 131.5% 1-Year Est. Return

Artisan Partners Milwaukee, Wisconsin $62.3B AUM 26.25% 1-Year Est. Return

Invesco Atlanta, Georgia $1.02T AUM 30.18% 1-Year Est. Return

D.E. Shaw & Co New York $166B AUM 43.98% 1-Year Est. Return

S&CO Inc's INSM Position: Q1 2026 in Review

S&CO Inc held its Insmed (INSM) position steady in Q1 2026 at 8,300 shares worth $1.36M. The position accounts for 0.08% of the portfolio, ranked #127.

S&CO Inc first reported a position in INSM in Q2 2025 and has held it in 4 quarters since. The position peaked at $1.44M in Q4 2025. 669 funds tracked by Wall St. Rank hold INSM as of Q1 2026.

S&CO Inc held 8,300 shares of Insmed worth $1.36M as of Q1 2026.
S&CO Inc left its Insmed share count unchanged in Q1 2026.
Insmed made up 0.08% of S&CO Inc's portfolio in Q1 2026, its #127 holding.
S&CO Inc first reported a position in Insmed in Q2 2025 and has held it in 4 quarters since.
S&CO Inc's Insmed position peaked at $1.44M in Q4 2025.
669 funds tracked by Wall St. Rank held Insmed as of Q1 2026.

Based on S&CO Inc's 13F filing for Q1 2026, filed 7 May 2026.