AMERICAN ONCOLOGY RESOURCES, INC. STATEMENT RE-COMPUTATION OF PER SHARE EARNINGS (IN THOUSANDS EXCEPT PER SHARE AMOUNTS) (UNAUDITED) THREE MONTHS NINE MONTHS ENDED SEPTEMBER 30, ENDED SEPTEMBER 30, ----------------------------- ---------------------------- 1998 1997 1998 1997 -------------- ------------- ------------- ------------- NET INCOME $ 7,448 $ 5,910 $ 22,211 $ 16,701 ============== ============= ============= ============= OUTSTANDING AT END OF PERIOD: Shares of Common Stock 32,692 29,014 32,692 29,014 Commitments to issue Common Stock at specific future dates 16,326 16,815 16,326 16,815 Treasury Stock (1,022) - (1,022) - Effect of weighting 634 (178) 444 (592) -------------- ------------- ------------- ------------- Total shares used in per share calculation - basic 48,630 45,651 48,440 45,237 ============== ============= ============= ============= Net income per share - basic $ 0.15 $ 0.13 $ 0.46 $ 0.37 ============== ============= ============= ============= ASSUMING FULL DILUTION: Outstanding per above 48,630 45,651 48,440 45,237 Options to purchase Common Stock 5,611 5,817 5,611 5,817 Effect of weighting and treasury stock method (4,315) (3,193) (3,999) (3,022) -------------- ------------- ------------- ------------- Total shares used in per share calculation - diluted 49,926 48,275 50,052 48,032 ============== ============= ============= ============= Net income per share - diluted $ 0.15 $ 0.12 $ 0.44 $ 0.35 ============== ============= ============= ============= 21