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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 CEO2026-06-251,292$106.27
$137.30kSell
William LewisChair and CEO2026-06-2512,518$30.46
$381.30kBuy
William LewisChair and CEO2026-06-258,880$17.16
$152.38kBuy
William LewisChair and CEO2026-06-2512,091$102.34
$1.24MSell
William LewisChair and CEO2026-06-251,836$103.10
$189.29kSell
William LewisChair and CEO2026-06-253,723$104.28
$388.23kSell
William LewisChair and CEO2026-06-252,456$105.27
$258.54kSell
Michael Alexander SmithChief Legal Officer2026-06-221,806$95.82
$173.05kSell
William LewisChair and CEO2026-06-086,515$94.03
$612.61kSell
Martina Md FlammerChief Medical Officer2026-06-051,858$103.78
$192.82kSell

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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 Co11.14%24,150,499$2.70BInstitution
Richard S. Kollender10.12%21,924,540$2.45BInsider
Darwin Global Management Ltd7.75%16,805,184$1.88BInstitution
Blackrock Inc7.69%16,678,146$1.86BInstitution
Fmr LLC6.07%13,160,167$1.47BInstitution
Vanguard Portfolio Management LLC4.79%10,371,802$1.16BInstitution
Vanguard Capital Management LLC4.45%9,642,131$1.08BInstitution
Baker Bros Advisors LP3.42%7,421,111$828.20MInstitution
Artisan Partners Limited Partnership3.01%6,527,301$728.45MInstitution
D E Shaw Co Inc2.60%5,625,825$627.84MInstitution

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INSM vs Biotech Stocks

TickerInst. %Insider %Net Insider (L12M)Net Insider (L3M)
INSM85.17%14.83%Net SellingNet Selling
UTHR86.75%13.25%Net SellingNet Buying
BNTX19.80%17.34%Net SellingNet Selling
INCY78.14%21.86%Net SellingNet Buying
ROIV44.31%55.69%Net SellingNet Selling
View Top Biotech Stocks

Insmed Stock Ownership FAQ

Who owns Insmed?

Insmed (NASDAQ: INSM) is owned by 99.83% institutional shareholders, 17.38% Insmed insiders, and 0.00% retail investors. Richard S. Kollender is the largest individual Insmed shareholder, owning 21.92M shares representing 10.12% of the company. Richard S. Kollender's Insmed shares are currently valued at $2.45B.

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