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NASDAQ: INSM
Insmed Inc Stock Ownership - Who owns Insmed?

OverviewForecastEarningsRevenueDividendOwnership

Insider buying vs selling

Have Insmed Inc insiders been buying or selling?

Buy
Sell
NameRoleDateSharesPriceValue
William LewisChair and CEO2026-04-16825$145.79
$120.28kSell
William LewisChair and CEO2026-04-166,259$30.46
$190.65kBuy
William LewisChair and CEO2026-04-164,440$17.16
$76.19kBuy
William LewisChair and CEO2026-04-162,246$142.99
$321.16kSell
William LewisChair and CEO2026-04-165,373$143.81
$772.69kSell
William LewisChair and CEO2026-04-162,255$144.66
$326.21kSell
William LewisChair and CEO2026-04-061,434$164.01
$235.19kSell
William LewisChair and CEO2026-04-066,259$30.46
$190.65kBuy
William LewisChair and CEO2026-04-064,440$17.16
$76.19kBuy
William LewisChair and CEO2026-04-06787$161.73
$127.28kSell

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Net Insider Buy/Sell (L12M) Ownership

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INSM Shareholders

What type of owners hold Insmed Inc stock?

Institutional
Insider
Retail
NameHoldSharesValueType
Jpmorgan Chase Co10.76%23,199,512$3.09BInstitution
Richard S. Kollender10.17%21,924,540$2.92BInsider
Vanguard Group Inc9.78%21,076,344$2.81BInstitution
Darwin Global Management Ltd9.71%20,933,277$2.79BInstitution
Blackrock Inc6.99%15,065,052$2.01BInstitution
Fmr LLC4.61%9,927,936$1.32BInstitution
Baker Bros Advisors LP3.06%6,592,746$878.55MInstitution
State Street Corp2.41%5,201,744$693.18MInstitution
Capital International Investors2.39%5,151,671$686.51MInstitution
Artisan Partners Limited Partnership2.25%4,843,749$645.48MInstitution

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INSM vs Biotech Stocks

TickerInst. %Insider %Net Insider (L12M)Net Insider (L3M)
INSM84.92%15.08%Net SellingNet Selling
RPRX61.89%17.26%Net SellingNet Selling
RVMD91.12%8.88%Net SellingNet Selling
UTHR86.81%13.19%Net SellingNet Selling
ONC2.35%32.03%Net BuyingNet Buying
View Top Biotech Stocks

Insmed Stock Ownership FAQ

Who owns Insmed?

Insmed (NASDAQ: INSM) is owned by 98.57% institutional shareholders, 17.51% Insmed insiders, and 0.00% retail investors. Richard S. Kollender is the largest individual Insmed shareholder, owning 21.92M shares representing 10.17% of the company. Richard S. Kollender's Insmed shares are currently valued at $2.92B.

If you're new to stock investing, here's how to buy Insmed stock.
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