Runzheimer, a vehicle management company based in Waterford in western Racine County, has been purchased by a Chicago investment firm and merged with a similar Boston-based company. Thoma Bravo, a private equity investment firm that also has offices in San Francisco, has acquired Runzheimer for an undisclosed amount and will combine it with the recently acquired firm, Motus. The merged company, still unnamed, will have approximately 2,000 corporate customers and more than 220,000 users, according...