WALTHAM, MASS. — Alkermes has signed a 100,000-square-foot lease at the Reservoir Woods campus in Waltham. The technology company plans to relocate its headquarters from Cambridge to the newly leased space, which is located at 850-852 Winter Street, a new 180,000-square-foot LEED-Gold certified office and lab building. The Reservoir Woods campus sits on 120 acres between the Massachusetts Turnpike and Route 2 at exit 27 off Route 128/US I95. The development is owned by a joint venture between affiliates of Davis Marcus Partners and Prudential Real Estate Investors. CB Richard Ellis represented the ownership in the transaction and Joseph Flaherty of Colliers Meredith & Grew represented Alkermes. The new tenant plans to complete their move by early 2010.