NASDAQ: ALNY
Alnylam Pharmaceuticals Inc Stock Ownership - Who owns Alnylam Pharmaceuticals?

Insider buying vs selling

Have Alnylam Pharmaceuticals Inc insiders been buying or selling?

Buy
Sell
NameRoleDateSharesPriceValue
Yvonne GreenstreetChief Executive Officer2025-06-0212,080$119.13
$1.44MBuy
Yvonne GreenstreetChief Executive Officer2025-06-027,217$118.05
$851.97kBuy
Yvonne GreenstreetChief Executive Officer2025-06-0219,297$306.00
$5.90MSell
Yvonne GreenstreetChief Executive Officer2025-05-3019,559$118.05
$2.31MBuy
Yvonne GreenstreetChief Executive Officer2025-05-306,171$306.00
$1.89MSell
Yvonne GreenstreetChief Executive Officer2025-05-3012,081$119.13
$1.44MBuy
Yvonne GreenstreetChief Executive Officer2025-05-3025,469$304.00
$7.74MSell
Michael W. BonneyDirector2025-05-151,239$278.01
$344.45kSell
Michael W. BonneyDirector2025-05-1511,250$131.21
$1.48MBuy
Michael W. BonneyDirector2025-05-15549$267.14
$146.66kSell

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Net Insider Buy/Sell (L12M) Ownership

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ALNY Shareholders

What type of owners hold Alnylam Pharmaceuticals Inc stock?

Institutional
Insider
Retail
NameHoldSharesValueType
Capital World Investors12.85%16,749,623$5.28BInstitution
Fmr LLC11.74%15,309,860$4.82BInstitution
Ag Novartis11.35%14,800,620$4.66BInsider
Vanguard Group Inc10.01%13,056,605$4.11BInstitution
Sanofi8.09%10,554,134$3.32BInsider
Blackrock Inc7.33%9,559,382$3.01BInstitution
Capital Research Global Investors5.49%7,154,728$2.25BInstitution
Regeneron Pharmaceuticals Inc3.41%4,444,445$1.40BInstitution
T Rowe Price Investment Management Inc3.39%4,418,145$1.39BInstitution
Baillie Gifford Co2.81%3,657,607$1.15BInstitution

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ALNY vs Biotech Stocks

TickerInst. %Insider %Net Insider (L12M)Net Insider (L3M)
ALNY82.29%17.71%Net SellingNet Selling
ARGX54.89%0.00%
ONC3.03%33.06%Net SellingNet Buying
BNTX21.53%0.00%
REGN69.47%30.53%Net Selling

Alnylam Pharmaceuticals Stock Ownership FAQ

Who owns Alnylam Pharmaceuticals?

Alnylam Pharmaceuticals (NASDAQ: ALNY) is owned by 98.71% institutional shareholders, 21.25% Alnylam Pharmaceuticals insiders, and 0.00% retail investors. Ag Novartis is the largest individual Alnylam Pharmaceuticals shareholder, owning 14.80M shares representing 11.35% of the company. Ag Novartis's Alnylam Pharmaceuticals shares are currently valued at $4.67B.

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