<ARTICLE> UT
<CIK> 0000050217
<NAME> INDIANAPOLIS POWER & LIGHT COMPANY
<MULTIPLIER> 1,000

                             
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-START>                             JAN-01-1999
<PERIOD-END>                               DEC-31-1999
<BOOK-VALUE>                                  PER-BOOK
<TOTAL-NET-UTILITY-PLANT>                    1,750,412
<OTHER-PROPERTY-AND-INVEST>                      5,753
<TOTAL-CURRENT-ASSETS>                         176,593
<TOTAL-DEFERRED-CHARGES>                       115,992
<OTHER-ASSETS>                                       0
<TOTAL-ASSETS>                               2,048,750
<COMMON>                                       324,537
<CAPITAL-SURPLUS-PAID-IN>                            0
<RETAINED-EARNINGS>                            453,331
<TOTAL-COMMON-STOCKHOLDERS-EQ>                 780,510
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                     59,135
<LONG-TERM-DEBT-NET>                           627,951
<SHORT-TERM-NOTES>                              49,000
<LONG-TERM-NOTES-PAYABLE>                            0
<COMMERCIAL-PAPER-OBLIGATIONS>                       0
<LONG-TERM-DEBT-CURRENT-PORT>                        0
<PREFERRED-STOCK-CURRENT>                            0
<CAPITAL-LEASE-OBLIGATIONS>                          0
<LEASES-CURRENT>                                     0
<OTHER-ITEMS-CAPITAL-AND-LIAB>                 532,154
<TOT-CAPITALIZATION-AND-LIAB>                2,048,750
<GROSS-OPERATING-REVENUE>                      834,652
<INCOME-TAX-EXPENSE>                            84,475
<OTHER-OPERATING-EXPENSES>                     566,676
<TOTAL-OPERATING-EXPENSES>                     651,151
<OPERATING-INCOME-LOSS>                        183,501
<OTHER-INCOME-NET>                               2,921
<INCOME-BEFORE-INTEREST-EXPEN>                 186,422
<TOTAL-INTEREST-EXPENSE>                        40,191
<NET-INCOME>                                   146,231
<PREFERRED-STOCK-DIVIDENDS>                      3,213
<EARNINGS-AVAILABLE-FOR-COMM>                  143,018
<COMMON-STOCK-DIVIDENDS>                       129,924
<TOTAL-INTEREST-ON-BONDS>                       38,057
<CASH-FLOW-OPERATIONS>                         224,859
<EPS-BASIC>                                          0
<EPS-DILUTED>                                        0