FILE - A Southwest Airlines jetliner waits on a runway for departure from Denver International Airport Friday, Sept. 1, 2023, in Denver. Activist shareholder Elliott Investment Management has taken a $1.9 billion stake in Southwest Airlines. The investment firm said Monday, June 10, 2024, that Southwest failed to keep up with other airlines and suffers from outdated technology and operations. (AP Photo/David Zalubowski, File)