United Continental Holdings, Inc. (formerly
UAL Corporation) is a publicly traded
airline holding company headquartered in the
Willis Tower in
Chicago. UCH owns and operates
United Airlines, Inc. The company is the successor of UAL Corporation, which agreed to change its name to United Continental Holdings in May 2010, when a merger agreement was reached between United and
Continental Airlines. Its stock trades under the UAL symbol. To effect the merger, Continental shareholders received 1.05 shares of UAL stock for each Continental share, effectively meaning Continental was acquired by UAL Corporation; at the time of closing, it was estimated that United shareholders owned 55% of the merged entity and Continental shareholders owned 45%. The company or its subsidiary airlines also have several other subsidiaries. Once completely combined, United became the world's largest airline, as measured by
revenue passenger miles. United is a founding member of the
Star Alliance.