Rex Tillerson, former Exxon Mobil Corp. chief executive and President-elect Donald Trump’s pick for U.S. secretary of state, will relinquish control of about $240 million in company shares if confirmed as he severs ties to comply with conflict-of-interest requirements. If confirmed, Tillerson will sell the more than 600,000 shares he owns in the largest U.S. oil explorer and transfer the value of more than 2 million in deferred shares to an independently managed trust, Exxon said in a statement dated Jan. 3. The former CEO would have received the shares over the next 10 years.