Chicago, Illinois-based United Airlines Holdings, Inc. (UAL) owns and manages airlines that transports people and cargos serving customers worldwide. With a market cap of $29.2 billion,  the company also offers catering, ground handling, flight academy, and maintenance services for third parties. Companies worth $10 billion or more are generally described as “large-cap stocks,” and UAL perfectly fits that description, with its market cap exceeding this mark, underscoring its size, influence, and dominanc ...