OMNICARE, INC. AND SUBSIDIARY COMPANIES Computation of Earnings Per Common Share (EPS) (in thousands, except per share data) Three Months Ended March 31, ----------------------- 1999(a) 1998(a)(b) --------- ----------- Basic Earnings: Net income $ 27,807 $ 20,406 -------- -------- -------- -------- Shares Weighted average number of common shares outstanding 90,526 88,114 -------- -------- -------- -------- Basic earnings per common share $ 0.31 $ 0.23 -------- -------- -------- -------- Diluted Earnings: Net income $ 27,807 $ 20,406 -------- -------- -------- -------- Shares Weighted average number of common shares outstanding 90,526 88,114 Additional shares assuming conversion of stock options and stock warrants 355 971 -------- -------- Average common shares outstanding as adjusted 90,881 89,085 -------- -------- -------- -------- Diluted earnings per common share $ 0.31 $ 0.23 -------- -------- -------- -------- (a) The $345,000,000 of 5.0% Convertible Subordinated Notes due 2007 that are convertible into 8,712,121 shares at $39.60 per share were outstanding during the three months ended March 31, 1999 and 1998 but were not included in the computation of diluted EPS because the impact was anti-dilutive. (b) The consolidated financial statements have been restated as of and for the three months ended March 31, 1998 to include the financial position and results of operations of CompScript, Inc. and IBAH, Inc., both acquired in June 1998 pooling-of-interests transactions.