ALNYLAM PHARMACEUTICALS INC (ALNY) Institutional Ownership and Insiders Activity

ALNYLAM PHARMACEUTICALS INC (ALNY) is widely held by institutional investors, with 3 tracked firms reporting positions valued at approximately $656.05M based on SEC Form 13F filings for the quarter ended March 31, 2026.

Dodge & Cox Stock Fund is the largest disclosed holder, reporting approximately $638.33M in ALNY holdings in its latest filing.

Institutional ownership among tracked investors remains highly concentrated, with Dodge & Cox Stock Fund representing the majority of disclosed value.