It is the fourth-largest architecture firm in the United States and one of the world's largest by revenue and number of architects.

[4][1] Corgan's origins can be traced back to a focus on movie theaters and drive-ins in its early years,[5][6] the firm has since diversified its portfolio, providing architectural services in aviation, commercial, data centers, education, healthcare, mixed-use, multifamily, offices, and workplaces.

[8] In this period, Corgan designed and completed over 90 movie theaters,[9] some of which remain operational or have undergone adaptive reuse, serving as historic landmarks.

Their plans for the terminal included features, such as a mezzanine dining room and moving walkways for airline passengers, which were considered innovative concepts at the time.

In addition to its headquarters in Dallas, the firm maintains offices in New York, Los Angeles, Chicago, Houston, San Francisco, Washington, D.C., Seattle, Atlanta, Phoenix, Austin, San Antonio, Orlando, Frisco, and Amarillo.