EXHIBIT 11 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, 1997 1996 1997 1996 --------- -------- ------- ------- NET INCOME............................................ $ 5,910 $ 4,303 $16,701 $12,810 ======= ======= ======= ======= OUTSTANDING AT END OF PERIOD: Shares of Common Stock.............................. 29,014 28,360 29,014 28,360 Commitments to issue Common Stock at specific future dates....................................... 16,815 16,999 16,815 16,999 Effect of weighting................................. (178) (637) (592) (1,438) ------- ------- ------- ------- 45,651 44,722 45,237 43,921 Options to purchase Common Stock...................... 5,817 5,128 5,817 5,128 Effect of treasury stock method....................... (3,193) (2,402) (3,022) (1,602) ------- ------- ------- ------- Total shares used in per share calculation............ 48,275 47,448 48,032 47,447 ======= ======= ======= ======= Net income per share.................................. $0.12 $0.09 $0.35 $0.27 ======= ======= ======= ======= ASSUMING FULL DILUTION: Outstanding per above............................... 48,275 47,448 48,032 47,447 Additional dilution resulting from use of period end price per share if higher than average......... 61 132 21 44 ------- ------- ------- ------- Total shares used in per share calculation............ 48,336 47,580 48,053 47,491 ======= ======= ======= ======= Net income per share.................................. $0.12 $0.09 $0.35 $0.27 ======= ======= ======= ======= -20-