Qatar Airways owns 9.99% of Cathay Pacific, 5% of China Southern (double American’s stake), and 10% of LATAM. They owned 49% of Air Italy before that carrier shut down. Their biggest remaining investment is in IAG, the parent of British Airways, Iberia, Aer Lingus, Vueling and soon Air Europa.
Qatar owned 21.4% of the British Airways parent – and has now increased that to 25.1%.