Bristol-Myers Squibb Co. has made several leadership changes, effective at the close of the annual Shareholders’ Meeting on May 5. Giovanni Caforio, M.D., has been named chief executive officer; Lamberto Andreotti will serve as executive chairman of the board and will continue to serve as chairman after his retirement on August 3. Also, James M. Cornelius has chosen not to stand for re-election as non-executive chairman and will retire from the board. Togo D. West, Jr. will become the lead indep...