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

Insider buying vs selling

Have Insmed Inc insiders been buying or selling?

Buy
Sell
NameRoleDateSharesPriceValue
Martina Md FlammerChief Medical Officer2025-12-011,559$207.73
$323.85kSell
Martina Md FlammerChief Medical Officer2025-12-015,886$207.03
$1.22MSell
Martina Md FlammerChief Medical Officer2025-12-011,450$205.98
$298.67kSell
Martina Md FlammerChief Medical Officer2025-12-018,895$25.83
$229.76kBuy
Elizabeth M. AndersonDirector2025-11-245,000$204.58
$1.02MSell
Leo LeeDirector2025-11-1714,944$195.39
$2.92MSell
Leo LeeDirector2025-11-1717,594$194.49
$3.42MSell
Leo LeeDirector2025-11-173,212$193.51
$621.55kSell
Leo LeeDirector2025-11-1724,076$196.61
$4.73MSell
Leo LeeDirector2025-11-1715,174$197.40
$3.00MSell

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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 Co10.81%23,047,676$4.76BInstitution
Richard S. Kollender10.28%21,924,540$4.53BInsider
Darwin Global Management Ltd9.59%20,457,445$4.23BInstitution
Vanguard Group Inc9.35%19,935,820$4.12BInstitution
Blackrock Inc5.80%12,364,904$2.55BInstitution
Fmr LLC4.30%9,180,963$1.90BInstitution
Capital International Investors3.54%7,553,853$1.56BInstitution
Price T Rowe Associates Inc3.25%6,931,466$1.43BInstitution
Baker Bros Advisors LP3.14%6,703,484$1.38BInstitution
D E Shaw Co Inc2.65%5,657,464$1.17BInstitution

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INSM vs Biotech Stocks

TickerInst. %Insider %Net Insider (L12M)Net Insider (L3M)
INSM84.89%15.11%Net SellingNet Selling
ONC2.29%32.11%Net BuyingNet Selling
ARGX50.00%0.00%
ALNY82.79%17.21%Net SellingNet Selling
BNTX20.98%0.00%

Insmed Stock Ownership FAQ

Who owns Insmed?

Insmed (NASDAQ: INSM) is owned by 98.86% institutional shareholders, 17.60% Insmed insiders, and 0.00% retail investors. Richard S. Kollender is the largest individual Insmed shareholder, owning 21.92M shares representing 10.28% of the company. Richard S. Kollender's Insmed shares are currently valued at $4.53B.

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