Alnylam closes $175M purchase of Merck subsidiary By: Boston Business Journal via Business Journals March 06, 2014 at 12:59 PM EST Alnylam Pharmaceuticals has closed its $175 million acquisition of Sirna Therapeutics Inc., a subsidiary of Merck & Co... Read More >> Related Stocks: Merck & Co Sanofi-Aventis S.A. ADR