<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
CONSOLIDATED CONDENSED FINANCIAL STATEMENTS OF ONEOK, INC. FOR THE TRANSITION
PERIOD ENDED DECEMBER 31, 1999, AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO
SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000

                             
<PERIOD-TYPE>                   4-MOS
<FISCAL-YEAR-END>                          DEC-31-2000
<PERIOD-START>                             SEP-01-1999
<PERIOD-END>                               DEC-31-1999
<CASH>                                              72
<SECURITIES>                                         0
<RECEIVABLES>                                  371,313
<ALLOWANCES>                                         0
<INVENTORY>                                    134,871
<CURRENT-ASSETS>                               593,721
<PP&E>                                       3,143,693
<DEPRECIATION>                               1,021,915
<TOTAL-ASSETS>                               3,239,575
<CURRENT-LIABILITIES>                          786,713
<BONDS>                                        775,074
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                        199
<COMMON>                                           316
<OTHER-SE>                                   1,151,009
<TOTAL-LIABILITY-AND-EQUITY>                 3,239,575
<SALES>                                        808,874
<TOTAL-REVENUES>                               808,874
<CGS>                                          523,533
<TOTAL-COSTS>                                  523,333
<OTHER-EXPENSES>                               199,377
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                              27,883
<INCOME-PRETAX>                                 58,081
<INCOME-TAX>                                    22,737
<INCOME-CONTINUING>                             35,344
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    35,344
<EPS-BASIC>                                       0.76
<EPS-DILUTED>                                     0.70