Exhibit 11 OMNICARE, INC. AND SUBSIDIARY COMPANIES Computation of Earnings Per Common Share (EPS) (in thousands, except per share data) Three Months Ended Six Months Ended June 30, June 30, ----------------------- ------------------------- 1999 1998 1999 1998 ---------- --------- ---------- --------- Basic Earnings: Net income $ 4,878 $ 8,106 $ 32,685 $ 28,512 ========== ========= ========== ======== Shares Weighted average number of common shares outstanding 90,890 88,824 90,709 88,466 ========== ========= ========== ======== Basic earnings per common share $ 0.05 $ 0.09 $ 0.36 $ 0.32 ========== ========= ========== ======== Diluted Earnings (a): Net income $ 4,878 $ 8,106 $ 32,685 $ 28,512 ========== ========= ========== ======== Shares Weighted average number of common shares outstanding 90,890 88,824 90,709 88,466 Additional shares assuming conversion of stock options and stock warrants 183 1,094 267 1,050 ---------- --------- ---------- --------- Average common shares outstanding as adjusted 91,073 89,918 90,976 89,516 ========== ========= ========== ======== Diluted earnings per common share $ 0.05 $ 0.09 $ 0.36 $ 0.32 ========== ========= ========== ======== (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 and six months ended June 30, 1999 and 1998 but were not included in the computation of diluted EPS because the impact was anti-dilutive.