Blackrock Industries, sometimes called Blackrock Enterprises, is a large corporation, headed by G.B. Blackrock. Its interests include petroleum refining, defense,and a chain of gas stations. Roxxon Corporation is Blackrock's major rival.
Strangely enough, though Blackrock Industries is a large supercorporation existing in a world that includes at least one superhero, it does not appear to be totally evil. How unconventional. President Blackrock himself does seem to secretly divert some of the company's resources toward his private interests, but this isn't nearly evil enough. Perhaps if he formed his own private army it would be a start.
Jazz has a nifty protection racket going with Blackrock Industries.