Exhibit 11 50 ALBEMARLE CORPORATION COMPUTATION OF PRO FORMA EARNINGS PER SHARE for the years ended December 31, 1999 and 1998 (In thousands except per share amounts) Pro Forma Pro Forma 1999 1998 ------------ ------------ BASIC EARNINGS PER SHARE Numerator: - ---------- Net income after effect of applying SFAS No. 123 "Accounting for Stock Based Compensation" $88,018 $83,924 ------- -------- Denominator: - ------------ Average number of shares of common stock outstanding 46,889 51,558 ------- -------- Basic earnings per share $1.88 $1.63 ------- -------- ------- -------- DILUTED EARNINGS PER SHARE Numerator: - ---------- Net income after effect of applying SFAS No. 123 "Accounting for Stock Based Compensation" $88,018 $83,924 ------- ------- Denominator: - ------------ Average number of shares of common stock outstanding 46,889 51,558 Shares issuable upon the assumed exercise of outstanding stock options 624 623 ------- ------- Total pro forma shares 47,513 52,181 ------- ------- ------- ------- Diluted earnings per share $1.85 $1.61 ------- ------- ------- -------