Meet this year’s Dallas 100: From A to Z, here are the fastest-growing private companies in North Texas. Once again, the Caruth Institute for Entrepreneurship at Southern Methodist University’s Cox School of Business is recognizing the 100 fastest-growing private companies in North Texas in the 26th year of the Dallas 100. To qualify for the Dallas 100, companies must meet a number of criteria based on their location, sales history, legal status, credit report and character.