Express Scripts shareholders will receive one share of the new holding company for each Express Script share they own. Upon the deal's close, which is expected to be in the first half of 2012 subject to regulatory clearance and shareholder approvals, Express Script shareholders will own approximately 59% of the new holding company, while Medco shareholders will own the remaining 41%. "The cost and quality of healthcare is a great concern to all Americans; this is the right deal at the right time for the right reasons," said Express Scripts CEO George Paz, who will continue as chairman and CEO of the new entity.