2014 Event Exxon Mobil takes the initiative among energy companies to disclose its plans for dealing with climate change in response to a 2013 shareholder resolution; the company's move may set a standard for other energy companies to follow 2013 Event Wal-Mart revenue exceeds that of Exxon Mobil, becoming the largest company by revenue on the Fortune 500 list 1991 Event Exxon pays $1-billion dollars in fines and cleanup of Valdez oil spill 1990 Event Former Exxon Valdez Captain Joseph Hazelwood ordered to help clean up Prince William Sound and pay $50,000 in restitution for 1989 oil spill 1990 Event Exxon Corp and Exxon Shipping are indicted on 5 criminal counts (Valdez) 1990 Event Exxon Valdez Captain Joseph Hazelwood goes on trial due to oil spill 1989 Event Worst U.S. oil spill, Exxon's Valdez spills 11.3 mil gallons off Alaska 1989 Event Exxon Houston runs aground in Hawaii, spills 117,000 gallons of oil
