Corp., the oil and gas producer has regained the top spot in the Fortune
500 list. The Irving based company was cited for its 35 percent increase in
profits in 2011 to $41.1 billion and its 28 percent increase in revenues to
$452.9 billion. Exxon’s move into the natural gas business, through it purchase
of Fort Worth-based XTO Energy in 2010, has put Exxon into the position of
producing as much natural gas as it does oil.