EXHIBIT 11.1 MILLENNIUM CHEMICALS INC. COMPUTATION OF PER SHARE EARNINGS WEIGHTED AVERAGE OF SHARES SHARES OUTSTANDING OUTSTANDING --------------- ---------- BASIC Shares of Common Stock outstanding at December 31, 1995....................... 74,412,283 74,412,283 --------------- ---------- Shares of Common Stock outstanding at December 31, 1996....................... 74,412,283 74,412,283 Issued December 1, 1997.................................................. 627,267 52,272 Issued October 1, 1997................................................... 4,092 1,023 Issued August , 1997................................................... 56,006 18,669 --------------- ---------- Shares of Common Stock and Common Stock Equivalents at December 31, 1997...... 75,099,648 74,484,247 --------------- ---------- Computation of Basic Earnings Per Share Year ended December 31, 1995: Income from continuing operations........................................ $ 331,000,000 --------------- Weighted average shares outstanding...................................... 74,412,283 Basic earnings per share................................................. $4.45 Income from discontinued operation....................................... $ 18,000,000 --------------- Weighted average shares outstanding...................................... 74,412,283 Basic earnings per share................................................. $0.24 Net income............................................................... $ 349,000,000 --------------- Weighted average shares outstanding...................................... 74,412,283 Basic earnings per share................................................. $4.69 Year ended December 31, 1996: Income from continuing operations........................................ $ 141,000,000 --------------- Weighted average shares outstanding...................................... 74,412,283 Basic earnings per share................................................. $1.89 Loss from discontinued operations........................................ $(2,842,000,000) --------------- Weighted average shares outstanding...................................... 74,412,283 Basic earnings per share................................................. $(38.19) Net loss................................................................. $(2,701,000,000) --------------- Weighted average shares outstanding...................................... 74,412,283 Basic earnings per share................................................. $(36.30) Pro forma income from continuing operations.............................. $ 168,000,000 --------------- Weighted average shares outstanding...................................... 74,412,283 Basic earnings per share................................................. $2.26 Year ended December 31, 1997: Net income............................................................... $ 184,627,000 --------------- Weighted average shares outstanding...................................... 74,484,247 Basic earnings per share................................................. $2.48 WEIGHTED AVERAGE OF SHARES SHARES OUTSTANDING OUTSTANDING --------------- ---------- DILUTED Shares of Common Stock outstanding at December 31, 1995....................... 74,412,283 74,412,283 --------------- ---------- Shares of Common Stock outstanding at December 31, 1996....................... 74,412,283 74,412,283 Issued December 1, 1997.................................................. 627,267 52,272 Issued October 1, 1997................................................... 4,092 1,023 Issued August, 1997...................................................... 56,006 18,669 Options.................................................................. 31,846 Time-vested restricted stock............................................. 130,000 --------------- ---------- Shares of Common Stock and Common Stock Equivalents at December 31, 1997...... 75,099,648 74,646,093 --------------- ---------- Computation of Diluted Earnings per Share Year ended December 31, 1995: Net income............................................................... $ 349,000,000 --------------- Weighted average shares outstanding...................................... 74,412,283 Diluted earnings per share............................................... $4.69 Year ended December 31, 1996: Net loss................................................................. $(2,701,000,000) --------------- Weighted average shares outstanding...................................... 74,412,283 Diluted earnings per share............................................... $(36.30) Year ended December 31, 1997: Net income............................................................... $ 184,627,000 --------------- Weighted average shares outstanding...................................... 74,646,093 Diluted earnings per share............................................... $2.47