StoneX Group

This brokerage and commodity trading services company had a record year, thanks in part to a jump in interest income driven by a flurry of fixed-income trading activity. Jumping a dozen spots in our list with a 19% revenue increase, StoneX just sneaks into the Fortune 100. A handful of acquisitions of payments and securities companies also pushed up revenue last year. The company's profits, meanwhile, jumped by more than 53% from last year's tally, helped along by insurance proceeds that let it recover some losses in its physical coal business.