CAMBRIDGE, Mass.--(BUSINESS WIRE)--Alnylam Pharmaceuticals, Inc. (Nasdaq: ALNY), a leading RNAi therapeutics company, today announced that Patricia Allen, Vice President, Finance and Treasurer, is resigning from the company to initially spend more time with her family and then pursue other opportunities. Michael Mason, who has been with Alnylam since 2005 and served most recently as Senior Director, Finance and Corporate Controller, is being promoted to Vice President, Finance and Treasurer. Patty will remain with Alnylam through a transition period.