EXHIBIT 11.1 CROWN CASTLE INTERNATIONAL CORP. COMPUTATION OF NET LOSS PER COMMON SHARE (IN THOUSANDS OF DOLLARS, EXCEPT PER SHARE AMOUNTS) Three Months Ended Nine Months Ended September 30, September 30, ----------------------- --------------------------- 1998 1999 1998 1999 ---------- ---------- ---------- -------------- (In thousands of dollars, except per share amounts) Loss before cumulative effect of change in $(17,444) $(27,067) $(30,476) $(61,390) accounting principle Dividends on preferred stock (216) (6,824) (4,348) (19,846) -------- -------- -------- -------- Loss before cumulative effect of change in (17,660) (33,891) (34,824) (81,236) accounting principle applicable to common stock for basic and diluted computations Cumulative effect of change in accounting principle -- -- -- (2,414) -------- -------- -------- -------- Net loss applicable to common stock for basic and $(17,660) $(33,891) $(34,824) $(83,650) diluted computations ======== ======== ======== ======== Weighted-average number of common shares 53,879 149,621 25,262 123,067 outstanding during the period for basic and diluted ======== ======== ======== ======== computations (in thousands) Per common share - basic and diluted: Loss before cumulative effect of change in $ (0.33) $ (0.23) $ (1.38) $ (0.66) accounting principle Cumulative effect of change in accounting -- -- -- (0.02) principle -------- -------- -------- -------- Net loss $ (0.33) $ (0.23) $ (1.38) $ (0.68) ======== ======== ======== ========