Ryanair is an Irish ultra low-cost airline group headquartered in Swords, Dublin, Ireland. The parent company Ryanair Holdings plc includes subsidiaries Ryanair DACTooltip Designated activity company, Malta Air, Buzz, Lauda Europe and Ryanair UK. Ryanair DAC, the oldest airline of the group, was founded in 1984. Ryanair Holdings was established in 1996 as a holding company for Ryanair with the two companies having the same board of directors and executive officers. In 2019, the transition began from the airline Ryanair and its subsidiaries into separate sister airlines under the holding company. Later in 2019, Malta Air joined Ryanair Holdings.
ソース: Wikipedia