 The state had previously held an 85% shareholding until the Government's decision to float the company on the Dublin and London stock exchanges on 2 October 2006.The principal group companies include Aer Lingus Limited, Aer Lingus Beachey Limited, Aer Lingus (Ireland) Limited and Dirnan Insurance Company Limited, all of which are wholly owned.On 26 May 2015, after months of negotiations on a possible IAG takeover, the Irish government agreed to sell its 25% stake in the company.