Well Popeye I did some searching, and from what I found it doesn't appear that they go under any other names besides Mobil and Exxon. The names of the individual gas stations may be different, but either the Exxon or Mobil logo should be displayed prominently on the outside of the station from what I can tell.
I looked at their financial numbers, and man they're quite staggering. It looks like they made 40.6 billion dollars last year alone. In 1998 their net income was "only" 6.37 billion, so yes they're indeed profiting nicely from this energy spike. Here's the link in case you're interested in taking a peek:
It would be nice if we would stop "feeding the pig" wouldn't it. But easier said than done. Too bad that hydrogen fuel cell isn't a viable alternative yet...hopefully someday though.