Page 1 of 2 THE INTERPUBLIC GROUP OF COMPANIES, INC. COMPUTATION OF EARNINGS PER SHARE (Dollars in Thousands Except Per Share Data) Year Ended December 31 1999 1998 1997 1996 1995 ---------------------------------------------------------------- BASIC: Net income $315,243 $333,593 $220,211 $228,914 $145,975 Weighted average number of common shares outstanding 292,066,936 288,830,671 277,870,558 278,293,933 272,378,306 Net income per share - Basic $1.08 $1.15 $ .79 $ .82 $ .54 DILUTED: Net income $315,243 $333,593 $220,211 $228,914 $145,975 After tax interest savings on assumed conversion of subordinated debentures(1)(2) -- -- 5,929 6,410 -- Add: Dividends paid net of related income tax applicable to the Restricted Stock Plan 631 541 447 384 461 ---------------------------------------------------------------- Net income, as adjusted $315,874 $334,134 $226,587 $235,708 $146,436 ================================================================ Weighted average number of common shares outstanding 292,066,936 288,830,671 277,870,558 278,293,933 272,378,306 Assumed conversion of subordinated debentures(1)(2) -- 5,320 8,020,582 8,933,004 -- Weighted average number of incremental shares in connection with assumed exercise of stock options 7,310,525 6,923,813 6,508,296 4,438,746 3,843,846 Weighted average number of incremental shares in connection with the Restricted Stock Plan 3,536,805 3,453,838 3,277,294 3,211,128 4,160,134 ----------------------------------------------------------------- Total 302,914,266 299,213,642 295,676,730 294,876,811 280,382,286 Diluted Earnings Per Share Data: Net Income $1.04 $1.12 $ .77 $ .80 $ .52 All share data for prior periods have been adjusted the two-for-one stock split effective July 15, 1999. - ----------------- [FN] (1) The computation of diluted EPS for 1999 excludes the assumed conversion of the 1.87% and 1.80% Convertible Subordinated Notes due 2006 and 2004, respectively, because they were antidilutive. (2) The computation of diluted EPS for 1998 and 1997 excludes the assumed conversion of the 1.80% Convertible Subordinated Notes due 2004 because they were antidilutive. Similarly, the computation of diluted EPS for 1995 excludes the assumed conversion of the 3 3/4% Convertible Subordinated Debentures due 2002 as they were antidilutive. </FN> EXHIBIT 11 Page 2 of 2 THE INTERPUBLIC GROUP OF COMPANIES, INC. COMPUTATION OF EARNINGS PER SHARE (UNAUDITED) (Dollars in Thousands Except Per Share Data) Three Months Ended March 31 2000 1999 ------------------------------ BASIC: Net income $ 37,295 $ 48,712 Weighted average number of common shares outstanding 293,897,273 290,532,167 Net income per share - Basic $0.13 $0.17 DILUTED(1): Net income $ 37,295 $ 48,712 Add: Dividends paid net of related income tax applicable to the Restricted Stock Plan 162 143 ------------------------------ Net income, as adjusted $ 37,457 $ 48,855 ============================== Weighted average number of common shares outstanding 293,897,273 290,532,167 Weighted average number of incremental shares in connection with assumed exercise of stock options 7,198,974 7,722,973 Weighted average number of incremental shares in connection with the Restricted Stock Plan 3,500,778 3,520,844 ------------------------------ Total 304,597,025 301,775,984 Diluted Earnings Per Share Data: Net Income $0.12 $0.16 - ----------------- [FN] (1) The computation of diluted EPS for 2000 and 1999 exclude the assumed conversion of the 1.80% Convertible Subordinated Notes due 2004, and for 2000 excludes the assumed conversion of the 1.87% Convertible Subordinated Notes due 2006, because they were antidilutive. </FN>