CAMBRIDGE, Mass., June 20, 2012 (GLOBE NEWSWIRE) -- Merrimack Pharmaceuticals, Inc. (Nasdaq:MACK) is set to join the broad-market Russell 3000® Index when Russell Investments reconstitutes its comprehensive set of U.S. and global equity indexes on June 25, according to a preliminary list of additions posted June 8 on www.russell.com. Merrimack is a biopharmaceutical company dedicated to the discovery and development of novel medicines for the treatment of cancer.
