Ryanair investors have registered a major protest vote against remuneration at the airline after Michael O’Leary, the long-serving chief executive, was granted a bonus that could be worth as much as €99m. The company’s AGM outside Dublin on Thursday was told that almost half of shareholders voted against the airline’s remuneration report, which received support from only 50.5 per cent. Investors also voted in large numbers against the re-election of longtime chairman David Bonderman, despite an ongoing management overhaul that will involve him stepping down next summer.