Shares in Samsung, worth about $310 billion, fell 1.5 percent on Friday after hitting an all-time high earlier in the day. CHANGING THE OLD GUARD The departure of 32-year Samsung veteran Kwon after five years in the top job comes at a time of leadership uncertainty at the company. Choi Gee-sung, Jay Lee's mentor, quit earlier this year for his alleged role in the bribery scandal, and Samsung Electronics now needs to fill several more key roles with Kwon's exit. Kwon would serve out his term as chairman of the board and board director until March 2018, the company said. He is also not stepping down immediately from his two other roles.