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Who owns Insmed (INSM) stock

647 funds reported Insmed (INSM) shares in their latest 13F filings, worth $25.9B in all. The largest holder is Vanguard Group ($3.7B). Last quarter 333 funds added to their stakes and 319 cut them. Members of Congress and other officials disclosed 1 trade (0 buys, 1 sales).

Largest holders of INSM (13F)Largest holders of INSM (13F)Vanguard Group$3.7BFMR LLC$1.7BBlackRock$1.7BVanguard Portfolio Management LLC$1.1BVanguard Capital Management LLC$1.0BBaker Bros. Advisors LP$938MCapital International Investors$878MDarwin Global Management$674MAmeriprise Financial$659MOrbis Allan Gray$648M

Largest holders (13F)

FundSharesValueChangeQuarter
Vanguard Group21,076,344$3.7Bincrease2025-12-31
FMR LLC16,143,583$1.7Bincrease2026-06-30
BlackRock15,807,984$1.7Bdecrease2026-06-30
Vanguard Portfolio Management LLC10,407,962$1.1Bincrease2026-06-30
Vanguard Capital Management LLC9,790,865$1.0Bincrease2026-06-30
Baker Bros. Advisors LP8,796,111$938Mincrease2026-06-30
Capital International Investors8,238,124$878Mincrease2026-06-30
Darwin Global Management6,431,163$674Mdecrease2026-06-30
Ameriprise Financial6,179,571$659Mincrease2026-06-30
Orbis Allan Gray6,076,487$648Mincrease2026-06-30
State Street6,052,174$645Mincrease2026-06-30
D. E. Shaw5,877,959$627Mincrease2026-06-30
Artisan Partners Limited Partnership5,441,718$580Mdecrease2026-06-30
RTW Investments, LP4,842,880$516Munchanged2026-06-30
Geode Capital Management, LLC4,220,155$449Mdecrease2026-06-30

Trades by Congress and other officials

DateWhoTradeAmount
2026-06-10Josh Gottheimerpartial sale$1K–$15K

Insmed's latest quarter

Insmed, Q3 2026: revenue $524M (+268% year over year), operating margin -17.0%, net loss $100M, operating cash flow −$36.5M. The chart follows the revenue to costs, profit and cash.

Questions

Who owns the most INSM stock?

By the latest 13F filings: Vanguard Group ($3.7B); FMR LLC ($1.7B); BlackRock ($1.7B); Vanguard Portfolio Management LLC ($1.1B); Vanguard Capital Management LLC ($1.0B).

Has Congress traded INSM stock?

Officials disclosed 1 trade on file: 0 buys and 1 sales. The latest: Josh Gottheimer, partial sale on 2026-06-10.

What is the short interest in INSM?

13,477,593 shares were sold short at the 2026-10-15 settlement, -2.34% of the float.

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Updated Nov 8, 2026. Read automatically from SEC filings and public data; errors are possible. Not investment advice.