IPALCO ENTERPRISES, INC. Exhibit 11.1 - Computation of Per Share Earnings For the Quarter Ended June 30, 2000 QUARTER ENDED JUNE 30, 2000: Basic Diluted -------------- ------------- Weighted average number of shares Average common shares outstanding at June 30, 2000 85,713,007 85,713,007 Dilutive effect for stock options at June 30, 2000 - 887,807 -------------- ------------- Adjusted weighted average shares at June 30, 2000 85,713,007 86,600,814 ============== ============= Net income to be used to compute diluted earnings per share (Dollars in thousands) Net income $28,980 $28,980 ============== ============= Earnings Per Share $.34 $.33 ============== ============= For the Six Months Ended June 30, 2000 SIX MONTHS ENDED JUNE 30, 2000: Basic Diluted -------------- ------------- Weighted average number of shares Average common shares outstanding at June 30, 2000 85,707,663 85,707,663 Dilutive effect for stock options at June 30, 2000 - 722,660 -------------- ------------- Adjusted weighted average shares at June 30, 2000 85,707,663 86,430,323 ============== ============= Net income to be used to compute diluted earnings per share (Dollars in thousands) Net income $121,307 $121,307 ============== ============= Earnings Per Share $1.42 $1.40 ============== =============