EXHIBIT 11 THE INTERPUBLIC GROUP OF COMPANIES, INC. AND ITS SUBSIDIARIES COMPUTATION OF EARNINGS PER SHARE (Amounts in Thousands Except Per Share Data) Three Months Ended March 31 --------------------------- Basic 2000 1999 ---- ---- Net income $ 36,345 $ 44,785 Weighted average number of common shares Outstanding 281,035 272,534 Earnings per common and common equivalent share $ .13 $ .16 ========= ========= Three Months Ended March 31 ---------------------------- Diluted (1) 2000 1999 ---- ---- Net income $ 36,345 $ 44,785 Add: Dividends paid net of related income tax applicable to restricted stock 162 143 --------- --------- Net income, as adjusted $ 36,507 $ 44,928 ========= ========= Weighted average number of common shares Outstanding 281,035 272,534 Weighted average number of incremental shares in connection with restricted stock and assumed exercise of stock options 10,253 10,816 --------- --------- Total 291,288 283,350 ========= ========= Earnings per common and common equivalent share $ .13 $ .16 ========= ========= - ---------- (1) The computation of diluted EPS for 2000 and 1999 excludes the assumed conversion of the 1.80% Convertible Subordinated Notes, and for 2000 excludes the assumed conversion of the 1.87% Convertible Subordinated Notes, because they were anti-dilutive.