EXHIBIT 99.1 TRANSOCEAN LTD. REPORTS FIRST QUARTER 2024 RESULTS Three months ended March 31, December 31, Sequential 2024 2023 change (In millions, except per share amounts and backlog) Contract drilling revenues $ 763 $ 741 $ 22 Adjusted contract drilling revenues $ 767 $ 748 $ 19 Revenue efficiency (1) 92.9 % 97.0 % (4.1)% Operating and maintenance expense $ 523 $ 569 $ (46) Net income (loss) attributable to controlling interest$ 98 $ (104) $ 202 Diluted earnings (loss) per share $ 0.11 $ (0.13) $ 0.24 Ad ...