The list just came out for the 5,000 fastest growing companies in the U.S. as reported by Inc. Magazine. Scanning through the list of the top 1,000 companies reveals a few names that I can recognize. You can see all the companies in the list for the Austin Metro Region. There are other sub-lists to help you break down the list as well.
Keep in mind that not all companies are comfortable reporting their revenues to the public. So this list will only contain the companies that feel comfortable disclosing details.