ExxonMobil reported the biggest quarterly profit in US history today, earning $11.68 billion or $2.22 a share as revenues rose 40% over the previous year. But those stratospheric numbers fell short of Wall Street’s estimates; analysts had expected crude prices, which have doubled over the past year, to power Exxon to a $2.52 per-share haul, and the company's stock fell in early trading. The figure topped Exxon’s own $11.66 billion record, posted in the fourth quarter of last year. (More Exxon Mobil stories.)