1 Exhibit 11.1 IRIDIUM WORLD COMMUNICATIONS LTD. COMPUTATION OF LOSS PER CLASS A COMMON SHARES (In Thousands Except Share Data) TWELVE MONTHS ENDED DECEMBER 31, ------------------------------------------ 1997 1998 -------------------- ------------------- NET LOSS APPLICABLE TO CLASS A COMMON SHARES: Net loss 18,834 107,639 Incremental equity loss pick-up upon assumed exercise of options, warrants and conversion of Class B Common Shares 1,531 13,615 -------------------- ------------------- Net loss applicable to Class A Common shares $ 20,365 $ 121,254 ==================== =================== AVERAGE NUMBER OF CLASS A SHARES: Average number of Class A Common shares outstanding 6,739,726 12,083,261 Diluted adjustments (2): Assumed exercise of options, warrants and conversion of Class B Common Shares 733,972 1,699,663 -------------------- ------------------- Average number of Class A Common shares assumed to be outstanding, assuming dilution 7,473,698 13,782,924 ==================== =================== NET LOSS PER CLASS A COMMON SHARE: Basic (1) $ 2.79 $ 8.91 Diluted (2) $ 2.72 $ 8.80 (1) The assumed exercise of options and warrants in periods of net loss are anti-dilutive and are not included in the computation and presentation of loss per Class A Common share. (2) The assumed exercise of options and warrants are anti-dilutive but are included in the calculation of diluted loss per Class A Common share in accordance with Regulation S-K, Item 601 (a) (11). - ----------------------------------------------------