Exxon Worth 500 Billion

Exxon's Market Cap Erupts Past $500 Billion

SAN FRANCISCO - Exxon Mobil Corp. shares rallied to a record high of $89.73 during Thursday's strong broader market surge, pushing the oil giant's market capitalization past the heady $500 billion threshold. Exxon Mobil is the most valuable publicly-traded company in the world.