Exxon Mobil ( XOM) said Thursday that its third-quarter profit soared 58% from a year ago and reached nearly $15 billion, beating its previous record for the highest quarterly earnings from a U.S. company. The oil and gas giant earned $14.83 billion, or $2.86 a share, in the latest quarter, up from $9.41 billion and $1.70 a share a year earlier. Excluding items, Exxon Mobil earned $2.59 in the most recent period. Analysts were looking for $2.38. Revenue jumped to $137.7 billion from $102.3 billion last year. Production decreased 8% from the third quarter of 2007. Exxon Mobil's results arrived on the same day Royal Dutch Shell ( RDS.A) said its own third-quarter earnings climbed 22% to $8.5 billion. Chevron ( CVX), like Exxon Mobil a component of the Dow Jones Industrial Average, will post its numbers Friday. Shares of Exxon Mobil were recently down 2.9% to $72.51.