ONEOK Announces Higher Second-Quarter and Six Months 2006 Earnings; Increases 2006 Earnings Guidance

August 02, 2006

TULSA, Okla., Aug 02, 2006 /PRNewswire-FirstCall via COMTEX News Network/ -- ONEOK, Inc. (NYSE: OKE) announced today that its second-quarter 2006 net income increased to $77.8 million, or 65 cents per diluted share, compared with $24.9 million, or 23 cents per diluted share, in the same period last year. The company also announced that it is increasing its 2006 earnings guidance to the range of $2.36 to $2.44 per diluted share, compared with previous guidance of $2.30 to $2.36 per diluted share

Second-quarter 2006 results include increases in the company's energy services and distribution segments and the consolidation of ONEOK Partners, L. P. (NYSE: OKS) results, which also had improved operating performance. Second-quarter ONEOK Partners results included a $113.9 million pre-tax gain on the sale of a 20 percent partnership interest in Northern Border Pipeline in April 2006; ONEOK's share of the gain is $52.0 million. ONEOK sold its gathering and processing, natural gas liquids, and pipelines and storage assets to ONEOK Partners and became sole general partner in April 2006.

"The completion of the transaction with ONEOK Partners, resulting in our becoming sole general partner and owner of 45.7 percent of the partnership, was a transforming event for our company," said David Kyle, ONEOK chairman, president and chief executive officer. "ONEOK Partners' second-quarter performance improved, resulting in $96.0 million in pre-tax income for ONEOK," Kyle added.

"Our energy services segment turned in exceptional results, continuing to create value for customers through the delivery of physical products and risk management services from its portfolio of contracted transportation and storage capacity," Kyle said. "Improved marketing margins, primarily due to optimization activities, and increased transportation basis spreads benefited the energy services business.

"The company's distribution segment had higher operating income, primarily as a result of increased rates in Oklahoma, partially offset by warmer than average weather in the quarter," Kyle added.

ONEOK adopted Financial Accounting Standards Board Emerging Issues Task Force Issue No. 04-5, requiring the company to consolidate its investment in ONEOK Partners in its financial statements, effective Jan. 1, 2006. The adoption did not have an effect on the company's net income; however, reported revenues, costs and expenses are higher, reflecting the activities of the partnership. Second-quarter and year-to-date 2006 results reflect the consolidation, which resulted in increased operating income to the company. Attachment A provides a consolidating income statement for the second quarter.

"ONEOK Partners' quarterly distributions have increased 19 percent this year and exceed the high end of the indicated distribution target range, and the partnership anticipates increasing future distributions as the partnership grows," Kyle stated. "The partnership has established a solid foundation for future growth -- benefiting partnership unit holders and ONEOK shareholders -- by announcing more than $1 billion in internally generated growth projects over the next three years."

ONEOK's net income for the six-month period was $207.3 million, or $1.80 per diluted share, compared with $132.5 million, or $1.20 per diluted share, in the first six months of 2005. Strong performances in the energy services and distribution segments, combined with the gain from the sale of a 20 percent partnership interest in Northern Border Pipeline and stronger performance by the assets sold to ONEOK Partners contributed to the increase.

    SECOND-QUARTER 2006 HIGHLIGHTS INCLUDED:
     *  Operating income of $269.4 million, compared with $52.2 million in
        2005, reflecting improved performance in energy services and
        distribution, the purchase of the natural gas liquids assets in
        July 2005 and the consolidation of ONEOK Partners' results, which also
        were higher;
     *  Operating costs of $247.2 million in the second quarter, compared with
        $177.8 million in the same period a year earlier, primarily because of
        the consolidation of the partnership's financial results and the
        purchase of the natural gas liquids assets in July 2005;
     *  Completion of the transactions in which ONEOK sold assets to ONEOK
        Partners, received $1.35 billion in cash and approximately
        36.5 million in limited partner units, and became the sole general
        partner and owner of 45.7 percent of the partnership;
     *  Selecting ONEOK Partners as the new name for Northern Border Partners
        to reflect the partnership's broader scope of operations, new
        ownership and management structure, and the aligned interests of the
        partnership and ONEOK;
     *  A pre-tax income contribution of $96.0 million from ONEOK Partners --
        which includes a $52.0 million pre-tax gain on ONEOK's portion of the
        sale of a 20 percent partnership interest in Northern Border Pipeline
        -- compared with $2.5 million in second quarter 2005;
     *  A 7 percent dividend increase to 32 cents per share, the ninth
        increase since the beginning of 2003;
     *  Filing a request with the Kansas Corporation Commission to increase
        Kansas Gas Service's annual revenues by $73.3 million;
     *  Energy services being selected to provide subsidiaries of FirstEnergy
        Corp. with natural gas supply and natural gas management services for
        three of its natural gas-fired electric generation plants;
     *  ONEOK, on a stand-alone basis, having no short-term debt, $620 million
        of cash invested and $670 million of natural gas in storage at the end
        of the second quarter;
     *  Consolidated long-term debt of 53 percent of total capitalization;
        ONEOK stand-alone long-term debt of 46 percent of capitalization;
     *  Consolidated cash flow from continuing operations, before changes in
        working capital, of $396.2 million, which exceeded capital
        expenditures, dividends and minority interest distributions of
        $273.8 million by $122.4 million.

    SECOND-QUARTER 2006 BUSINESS-UNIT RESULTS

    Energy Services

The energy services segment posted operating income of $53.5 million in the second quarter 2006, compared with $2.9 million in the second quarter 2005. Net margin increased to $64.3 million from $11.2 million in the same period last year.

Net margin increases during the second quarter included: $21.9 million in marketing margins due to optimization activities; $16.8 million in transportation margins, net of hedges, due to improved natural gas basis differentials in the Mid-Continent and Gulf Coast regions; and a $1.3 million increase from improved physical margins in the retail business. Financial trading margins were $8.7 million in the second quarter 2006, compared with a loss of $4.7 million in the second quarter 2005, due to improved trading margins in the natural gas options portfolio.

Operating costs for the second quarter 2006 increased to $10.3 million, compared with $7.8 million in the same period last year, due primarily to higher employee-related costs.

Six-month operating income was $146.8 million, compared with $55.6 million in the same period 2005. Net margin increased to $167.5 million from $72.4 million in the same period last year.

Net margin increases during the first half of the year included: $45.0 million in transportation margins, net of hedges, due to improved natural gas basis differentials in the Mid-Continent and Gulf Coast regions; a $32.0 million increase in marketing margins due to increases in demand fees associated with peaking and load-following services in the first quarter 2006 and optimization activities in the second quarter 2006, and a $1.5 million increase from improved physical margins in the retail business. Financial trading margins were $20.6 million in the first half 2006, compared with $3.1 million in the same period 2005, due to successful basis trading activities, as well as improved trading margins in the option portfolio.

Operating costs for the first half 2006 increased to $19.6 million, compared with $15.8 million in the same period last year, due primarily to higher employee-related costs.

Natural gas volumes marketed declined in the second quarter and six-month period, primarily due to higher storage injections in the second quarter 2006. In addition, warmer weather in the first quarter throughout most of the segment's service territory resulted in decreased storage withdrawals.

On June 30, 2006, natural gas in storage was 73.3 Bcf, compared with 59.0 Bcf a year earlier. Natural gas in storage on July 31, 2006, was 69.9 Bcf. Natural gas storage capacity under lease was 86 Bcf on June 30, 2006, unchanged from a year earlier.

    The net margin for the energy services segment was derived from the
following sources:



                                      Three Months Ended    Six Months Ended
                                            June 30,             June 30,
                                         2006     2005       2006      2005
                                              (Thousands of dollars)
    Marketing and storage, gross       $95,637  $52,952   $230,705  $144,439
    Less:  Storage and transportation
     costs                             (44,282) (40,074)   (93,541)  (83,376)
     Marketing and storage, net         51,355   12,878    137,164    61,063
    Retail marketing                     4,310    3,047      9,759     8,257
    Financial trading                    8,662   (4,677)    20,558     3,123
    Net margin                         $64,327  $11,248   $167,481   $72,443



    Distribution

The distribution segment reported second-quarter 2006 operating income of $0.9 million, compared with a loss of $7.0 million in the same period last year. Net margin was $119.6 million versus $106.5 million in the same period a year earlier.

Second-quarter net margins improved $13.1 million, primarily resulting from a $15.4 million increase from the implementation of new rate schedules in Oklahoma in July 2005, partially offset by a $3.1 million decrease related to expiring riders and lower volumetric-dependent rider collections in Oklahoma.

Operating costs were $91.5 million in the quarter, compared with $83.5 million in the same quarter 2005, primarily as a result of a $7.8 million increase in labor and employee benefit costs. Depreciation, depletion and amortization expense was $27.2 million, compared with $30.0 million in the second quarter 2005. The decrease was primarily related to a limited issue rider that expired in Oklahoma.

The distribution segment reported six month 2006 operating income of $77.7 million, compared with $73.6 million in the same period last year. Net margin was $315.1 million versus $307.7 million in the same period a year earlier.

Six-month net margins improved $7.4 million with the implementation of new rate schedules in Oklahoma in July 2005 adding $30.3 million, offset by a $15.8 million decline related to expiring riders and lower volumetric- dependent rider collections in Oklahoma and a $9.0 million decline in customer sales due to warmer weather in the segment's entire service territory.

Operating costs were $182.0 million in the first six months, compared with $174.1 million in the same period 2005, primarily as a result of a $9.9 million increase in labor and employee benefit costs, partially offset by a $2.7 million decrease in bad debt expense. Depreciation, depletion and amortization expense was $55.3 million, compared with $60.0 million in the six-month period 2005. The decrease was primarily related to a $2.9 million charge in the first quarter 2005 related to the replacement of a customer service system in Texas and the expiration of a limited issue rider in Oklahoma.

Residential and commercial natural gas volumes decreased in the second quarter and six-month period due to warmer weather, primarily in the first quarter 2006.

ONEOK Partners

Partnership operating income increased to $212.6 million in the second quarter 2006, compared with $56.4 million in the same period a year earlier, and included a $113.9 million pre-tax gain on the sale of a 20 percent partnership interest in Northern Border Pipeline in April 2006.

Net margin was $215.2 million in the second quarter 2006 versus $114.3 million in the same period 2005. Net margin increases included $44.1 million from the legacy ONEOK Partners' assets that ONEOK was required to consolidate on Jan. 1, 2006; $59.4 million related to the acquisition of the natural gas liquids assets acquired by ONEOK, Inc. in July 2005; $8.5 million increase resulting from the partnership's consolidation of the Guardian Pipeline, beginning Jan. 1, 2006; and $12.2 million from higher commodity prices, wider gross processing spreads and increased transportation revenues. These increases were partially offset by a $20.9 million decrease resulting from the December 2005 sale of the Texas gathering and processing assets.

Depreciation, depletion and amortization expense was $39.3 million in the second quarter 2006, compared with $13.0 million in the same period last year. Second-quarter depreciation, depletion and amortization expense included a non-cash impairment charge of $11.8 million related to the partnership's Black Mesa coal slurry pipeline operation.

Operating expenses for the second quarter 2006 were $77.2 million versus $44.9 million in the same period last year. The operating cost increase is primarily related to the consolidation of the legacy ONEOK Partners operations, the natural gas liquids assets acquired in July 2005 and the consolidation of Guardian Pipeline, offset by the sale of the Texas gathering and processing assets.

For the six months, operating income increased to $312.5 million, compared with $108.4 million in the same period a year earlier, and included the gain on the sale of a 20 percent partnership interest in Northern Border Pipeline.

Net margin was $420.1 million in the first half 2006 versus $222.8 million in the same period a year earlier. Net margin increases included $91.5 million from the legacy ONEOK Partners' assets that were consolidated on Jan. 1, 2006; $101.8 million related to the acquisition of the natural gas liquids assets acquired by ONEOK in July 2005; $17.8 million increase resulting from the consolidation of Guardian Pipeline, beginning Jan. 1, 2006; and 28.4 million from higher commodity prices, significantly wider gross processing spreads and increased transportation revenues. These increases were partially offset by a $39.7 million decrease resulting from the December 2005 sale of the Texas gathering and processing assets.

Depreciation, depletion and amortization expense was $66.8 million in the first half 2006 and includes the $11.8 million non-cash impairment charge related to the Black Mesa coal slurry pipeline, compared with $25.7 million in the same period last year. Operating expenses in the first six months of 2006 were $155.8 million, compared with $88.7 million last year, primarily related to the consolidation of the legacy ONEOK Partners operations, the natural gas liquids assets acquired in July 2005 and the consolidation of Guardian Pipeline, offset by the sale of the Texas gathering and processing assets.

2005 operating results for the assets sold to ONEOK Partners are included in ONEOK's consolidated financial results; however, ONEOK Partners' legacy assets are not included in ONEOK's 2005 results.

UPDATED 2006 EARNINGS GUIDANCE

As reflected in Attachment B, ONEOK is updating its 2006 earnings guidance, which was originally disclosed on March 8, 2006, to reflect projected changes in the company's energy services and ONEOK Partners segments.

For 2006, the company expects net income per diluted share to be in the range of $2.36 to $2.44 per diluted share. Previous guidance was $2.30 to $2.36 per diluted share.

Energy services operating income estimates have been updated to $195 million from $183 million to reflect financial trading margins realized in the first half of 2006, partially offset by lower than expected natural gas storage withdrawals in the second half of 2006. Second-half 2006 guidance does not include any additional margin from financial trading activities.

Distribution operating income is now estimated at $122 million, compared with previous guidance of $124 million. The slight reduction is related to warmer weather in the first half of 2006.

Operating income from ONEOK Partners has been increased to $363 million from $340 million. The increase is the result of the partnership purchasing the remaining interest in Guardian Pipeline and higher first-half 2006 gross processing spreads in the partnership's gathering and processing segment.

Estimated consolidated capital expenditures have increased to $444 million from $319 million. ONEOK Partners' capital expenditures increased to $293 million to reflect the planned expenditures related to Overland Pass Pipeline and related infrastructure projects and the increased ownership in Guardian Pipeline. Distribution segment capital expenditures are unchanged at $148 million.

On a consolidated basis, expected cash flow from operations, before changes in working capital, is being revised to $701 million, a reduction of $98 million, to reflect current income taxes on the partnership's distributions received by ONEOK, which are expected to be higher in 2006 than originally estimated. As a result, capital expenditures, dividends and distributions to minority interests are expected to exceed cash flow by $45 million.

On a stand-alone basis, ONEOK's cash flow, before changes in working capital, is expected to exceed capital expenditures and dividends by $108 million to reflect the higher taxes and the timing of the partnership's fourth-quarter distribution of about $43 million, which will not be received until February 2007.

EARNINGS CONFERENCE CALL

ONEOK and ONEOK Partners management will conduct a joint conference call on Aug. 3, 2006, at 11 a.m. Eastern Daylight Time (10 a.m. Central Daylight Time). The call will also be carried live on ONEOK's and ONEOK Partners' Web sites.

To participate in the telephone conference call, dial 866-836-4700, pass code 890065, or log on to http://www.oneok.com or http://www.oneokpartners.com .

If you are unable to participate in the conference call or the webcast, the replay will be available on ONEOK's Web site http://www.oneok.com and ONEOK Partners' Web site http://www.oneokpartners.com for 30 days. A recording will be available by phone for seven days. The playback call may be accessed at 866-837-8032, pass code 890065.

ONEOK, Inc. is a diversified energy company. We are the general partner and own 45.7 percent of ONEOK Partners, L.P., one of the largest publicly traded limited partnerships, which is a leader in the gathering, processing, storage and transportation of natural gas in the U.S. and owns one of the nation's premier natural gas liquids (NGL) systems, connecting much of the natural gas and NGL supply in the Mid-Continent with key market centers. ONEOK is among the largest natural gas distributors in the United States, serving more than 2 million customers in Oklahoma, Kansas and Texas. Our energy services operation focuses primarily on marketing natural gas and related services throughout the U.S. ONEOK is a Fortune 500 company.

For information about ONEOK, Inc. visit the Web site http://www.oneok.com

Some of the statements contained and incorporated in this news release are forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. The forward-looking statements relate to: anticipated financial performance; management's plans and objectives for future operations; business prospects; outcome of regulatory and legal proceedings; market conditions and other matters. The Private Securities Litigation Reform Act of 1995 provides a safe harbor for forward-looking statements in certain circumstances. The following discussion is intended to identify important factors that could cause future outcomes to differ materially from those set forth in the forward-looking statements.

Forward-looking statements include the items identified in the preceding paragraph, the information concerning possible or assumed future results of our operations and other statements contained or incorporated in this news release identified by words such as "anticipate," "plan," "estimate," "expect," "forecast," "intend," "believe," "projection" or "goal."

You should not place undue reliance on forward-looking statements. Known and unknown risks, uncertainties and other factors may cause our actual results, performance or achievements to be materially different from any future results, performance or achievements expressed or implied by forward- looking statements. Those factors may affect our operations, markets, products, services and prices. In addition to any assumptions and other factors referred to specifically in connection with the forward-looking statements, factors that could cause our actual results to differ materially from those contemplated in any forward-looking statement include, among others, the following:

     *  actions by rating agencies concerning the credit ratings of ONEOK and
        ONEOK Partners;
     *  the effects of weather and other natural phenomena on our operations,
        including energy sales and prices and demand for pipeline capacity;
     *  competition from other U.S. and Canadian energy suppliers and
        transporters as well as alternative forms of energy;
     *  the capital intensive nature of our businesses;
     *  the profitability of assets or businesses acquired by us;
     *  risks of marketing, trading and hedging activities, including the
        risks of changes in energy prices or the financial condition of our
        counterparties;
     *  economic climate and growth in the geographic areas in which we do
        business;
     *  the risk of a significant slowdown in growth or decline in the U.S.
        economy or the risk of delay in growth recovery in the U.S. economy;
     *  the uncertainty of estimates, including accruals and costs of
        environmental remediation;
     *  the timing and extent of changes in commodity prices for natural gas,
        NGLs, electricity and crude oil;
     *  the effects of changes in governmental policies and regulatory
        actions, including changes with respect to income taxes, environmental
        compliance, and authorized rates or recovery of gas and gas
        transportation costs;
     *  the impact of recently issued and future accounting pronouncements and
        other changes in accounting policies;
     *  the possibility of future terrorist attacks or the possibility or
        occurrence of an outbreak of, or changes in, hostilities or changes in
        the political conditions in the Middle East and elsewhere;
     *  the risk of increased costs for insurance premiums, security or other
        items as a consequence of terrorist attacks;
     *  the impact of unforeseen changes in interest rates, equity markets,
        inflation rates, economic recession and other external factors over
        which we have no control, including the effect on pension expense and
        funding resulting from changes in stock and bond market returns;
     *  risks associated with pending or possible acquisitions and
        dispositions, including our ability to finance or integrate any such
        acquisitions and any regulatory delay or conditions imposed by
        regulatory bodies in connection with any such acquisitions and
        dispositions;
     *  the results of administrative proceedings and litigation, and
        regulatory actions including receipt of expected regulatory clearances
        involving the Oklahoma Corporation Commission, KCC, Texas regulatory
        authorities or any other local, state or federal regulatory body,
        including the FERC;
     *  our ability to access capital at competitive rates or on terms
        acceptable to us;
     *  risks associated with adequate supply to our gas gathering and
        processing, fractionation and pipeline facilities, including
        production declines which outpace new drilling;
     *  the risk that material weaknesses or significant deficiencies in our
        internal controls over financial reporting could emerge or that minor
        problems could become significant;
     *  the impact of the outcome of pending and future litigation;
     *  the possible loss of gas distribution franchises or other adverse
        effects caused by the actions of municipalities;
     *  the impact of unsold pipeline capacity being greater or less than
        expected;
     *  the ability to market pipeline capacity on favorable terms, including
        the affects of:
        --  future demand for and prices of natural gas;
        --  competitive conditions in the overall natural gas and electricity
            markets;
        --  availability of supplies of Canadian and United States natural
            gas;
        --  availability of additional storage capacity;
        --  weather conditions; and
        --  competitive developments by Canadian and U.S. natural gas
            transmission peers;
     *  orders by the FERC which are significantly different than our
        assumptions related to ONEOK Partner's November 2005 rate case;
     *  performance of contractual obligations by our customers and shippers;
     *  the ability to recover operating costs and amounts equivalent to
        income taxes, costs of property, plant and equipment and regulatory
        assets in our state and FERC regulated rates;
     *  timely receipt of required regulatory clearances for construction and
        operation of the Midwestern Gas Transmission Eastern Extension
        Project;
     *  our ability to acquire all necessary pipeline rights-of-way and obtain
        agreements for interconnects in a timely manner;
     *  our ability to promptly obtain all necessary materials and supplies
        required for construction of gathering, processing and transportation
        facilities;
     *  the composition and quality of the natural gas we gather and process
        in our plants and transport on our pipelines;
     *  the efficiency of our plants in processing natural gas and extracting
        natural gas liquids;
     *  renewal of our coal slurry pipeline transportation contract under
        reasonable terms and our success in completing the necessary
        rebuilding of the coal slurry pipeline;
     *  the impact of potential impairment charges;
     *  developments in the December 2, 2001 filing by Enron of a voluntary
        petition for bankruptcy protection under Chapter 11 of the United
        States Bankruptcy Code affecting our settled claims;
     *  our ability to control operating costs;
     *  the risk inherent in the use of information systems in our respective
        businesses, implementation of new software and hardware, and the
        impact on the timeliness of information for financial reporting;
     *  acts of nature, sabotage, terrorism or other similar acts causing
        damage to our facilities or our suppliers' or shippers' facilities;
        and
     *  the risk factors listed in the reports we have filed and may file with
        the Securities and Exchange Commission.

Other factors and assumptions not identified above were also involved in the making of the forward-looking statements. The failure of those assumptions to be realized, as well as other factors, may also cause actual results to differ materially from those projected. We have no obligation and make no undertaking to update publicly or revise any forward-looking information.

    ONEOK, Inc. and Subsidiaries
    CONSOLIDATED STATEMENTS OF INCOME

                                 Three Months Ended       Six Months Ended
                                       June 30,                June 30,
    (Unaudited)                    2006        2005        2006        2005
                              (Thousands of dollars, except per share amounts)
    Revenues
    Operating revenues,
     excluding energy trading
     revenues                  $2,427,795  $2,089,574  $6,176,064  $4,787,422
    Energy trading revenues,
     net                            4,112      (8,784)     11,482         408
    Total Revenues              2,431,907   2,080,790   6,187,546   4,787,830
    Cost of sales and fuel      2,030,258   1,850,812   5,281,367   4,187,456
    Net Margin                    401,649     229,978     906,179     600,374
    Operating Expenses
    Operations and maintenance    160,173     118,475     320,923     241,977
    Depreciation, depletion
     and amortization              67,094      43,673     123,420      86,889
    General taxes                  19,901      15,648      38,283      32,947
    Total Operating Expenses      247,168     177,796     482,626     361,813
    Gain on Sale of Assets        114,904         ---     115,892         ---
    Operating Income              269,385      52,182     539,445     238,561
    Other income                   26,266       3,938      63,279       9,236
    Other expense                   5,898       3,939      11,734       4,722
    Interest expense               59,603      23,991     115,188      50,081
    Income before Minority
     Interest and Income Taxes    230,150      28,190     475,802     192,994
    Minority interest in
     income of consolidated
     subsidiaries                 100,567         ---     136,339         ---
    Income taxes                   51,638      11,116     131,779      74,142
    Income from Continuing
     Operations                    77,945      17,074     207,684     118,852
    Discontinued operations,
     net of taxes:
       Income (loss) from
        operations of
        discontinued
        components, net of tax       (150)      7,778        (397)     13,664
    Net Income                    $77,795     $24,852    $207,287    $132,516
    Earnings Per Share of
     Common Stock
     Basic:
      Earnings per share from
       continuing operations        $0.66       $0.17       $1.85       $1.16
      Earnings per share from
       operations of discontinued
       components, net of tax         ---        0.08         ---        0.13
     Net earnings per share, basic  $0.66       $0.25       $1.85       $1.29
     Diluted:
      Earnings per share from
       continuing operations        $0.65       $0.16       $1.80       $1.08
      Earnings per share from
       operations of discontinued
       components, net of tax         ---        0.07         ---        0.12
    Net earnings per share,
     diluted                        $0.65       $0.23       $1.80       $1.20
    Average Shares of Common
     Stock (Thousands)
     Basic                        117,423     101,143     112,283     102,404
     Diluted                      119,026     109,062     114,891     110,031
    Dividends Declared Per
     Share of Common Stock          $0.30       $0.56       $0.58       $0.81



    ONEOK, Inc. and Subsidiaries
    CONSOLIDATED BALANCE SHEETS
                                                  June 30,        December 31,
    (Unaudited)                                     2006              2005
    Assets                                          (Thousands of dollars)

    Current Assets
      Cash and cash equivalents                   $645,349            $7,915
      Trade accounts and notes receivable, net     971,855         2,202,895
      Gas and natural gas liquids in storage       905,098           911,393
      Commodity exchanges                          203,187           133,159
      Energy marketing and risk management
       assets                                      172,738           765,157
      Other current assets                         326,100           385,274
        Total Current Assets                     3,224,327         4,405,793

    Property, Plant and Equipment
      Property, plant and equipment              6,534,378         5,575,365
      Accumulated depreciation, depletion
       and amortization                          1,823,874         1,581,138
        Net Property, Plant and Equipment        4,710,504         3,994,227

    Deferred Charges and Other Assets
      Goodwill and intangibles                   1,027,336           683,211
      Energy marketing and risk management
       assets                                       22,869           150,026
      Investments and other                      1,127,460           716,298
        Total Deferred Charges and Other
         Assets                                  2,177,665         1,549,535

    Assets of Discontinued Component                63,608            63,911

          Total Assets                         $10,176,104       $10,013,466



    ONEOK, Inc. and Subsidiaries
    CONSOLIDATED BALANCE SHEETS
                                                  June 30,        December 31,
    (Unaudited)                                     2006              2005
    Liabilities and Shareholders' Equity            (Thousands of dollars)

    Current Liabilities
      Current maturities of long-term debt         $18,485            $6,546
      Notes payable                              1,364,000         1,541,500
      Accounts payable                             943,194         1,756,307
      Commodity exchanges                          337,765           238,176
      Energy marketing and risk management
       liabilities                                 255,559           814,803
      Other                                        403,020           438,009
        Total Current Liabilities                3,322,023         4,795,341

    Long-term Debt, excluding current
     maturities                                  2,630,320         2,024,070

    Deferred Credits and Other Liabilities
      Deferred income taxes                        572,738           603,835
      Energy marketing and risk management
       liabilities                                 149,596           442,842
      Other deferred credits                       330,669           350,157
        Total Deferred Credits and Other
         Liabilities                             1,053,003         1,396,834

    Liabilities of Discontinued Component            2,359             2,464

    Commitments and Contingencies

    Minority Interests in Consolidated
     Subsidiaries                                  802,407               ---

    Shareholders' Equity
      Common stock, $0.01 par value:
       authorized 300,000,000 shares; issued
       119,677,784 shares and outstanding
       117,522,979 shares at June 30, 2006;
       issued 107,973,436 shares and
       outstanding 97,654,697 shares at
       December 31, 2005                             1,197             1,080
      Paid in capital                            1,236,695         1,044,283
      Unearned compensation                            ---              (105)
      Accumulated other comprehensive loss         (43,701)          (56,991)
      Retained earnings                          1,230,621         1,085,845
      Treasury stock, at cost: 2,154,805 shares
       at June 30, 2006 and 10,318,739 shares
       at December 31, 2005                        (58,820)         (279,355)
        Total Shareholders' Equity               2,365,992         1,794,757

          Total Liabilities and Shareholders'
           Equity                              $10,176,104       $10,013,466



    ONEOK, Inc. and Subsidiaries
    CONSOLIDATED STATEMENTS OF CASH FLOWS

                                                    Six Months Ended June 30,
    (Unaudited)                                      2006              2005
    Operating Activities                             (Thousands of dollars)
      Net income                                   $207,287          $132,516
      Depreciation, depletion, and
       amortization                                 123,420            86,889
      Gain on sale of assets                       (115,892)              526
      Minority interest in income of
       consolidated subsidiaries                    136,339               ---
      Distributions received from
       unconsolidated affiliates                     69,819               570
      Income from equity investments                (49,817)           (5,649)
      Deferred income taxes                           9,982            17,471
      Stock-based compensation expense                8,495             5,983
      Allowance for doubtful accounts                 6,575             8,188
      Changes in assets and liabilities
       (net of acquisition and disposition
       effects):
        Accounts and notes receivable             1,270,248           494,362
        Inventories                                   2,141            42,347
        Unrecovered purchased gas costs             (51,135)            1,326
        Commodity exchanges                          29,561               ---
        Deposits                                     (5,652)          (44,413)
        Regulatory assets                            12,427            (4,435)
        Accounts payable and accrued
         liabilities                               (841,045)         (250,332)
        Energy marketing and risk management
         assets and liabilities                    (135,401)           38,782
        Other assets and liabilities                110,851          (101,085)
        Cash Provided by Operating Activities       788,203           423,046
    Investing Activities
      Changes in other investments, net              (6,222)          (30,779)
      Acquisitions                                 (128,485)              ---
      Capital expenditures                         (132,593)         (122,687)
      Proceeds from sale of assets                  298,802              (334)
      Increase in cash and cash equivalents
       for previously unconsolidated subsidiaries     1,334               ---
      Decrease in cash and cash equivalents
       for previously consolidated subsidiaries     (22,039)              ---
      Other investing activities                     (2,376)           (2,215)
        Cash Provided by (Used in) Investing
         Activities                                   8,421          (156,015)
    Financing Activities
      Borrowing (repayment) of notes
       payable, net                                (384,000)         (532,500)
      Issuance of debt, net of issuance
       costs                                            ---           798,792
      Termination of interest rate swaps                ---           (22,565)
      Payment of debt                               (31,955)         (335,456)
      Equity unit conversion                        402,448               ---
      Repurchase of common stock                     (2,276)         (112,507)
      Issuance of common stock                        2,657             7,857
      Debt reacquisition costs                          ---               ---
      Dividends paid                                (62,564)          (54,576)
      Distributions to minority interests           (78,594)              ---
      Other financing activities                    (47,996)           (8,931)
        Cash Used in Financing Activities          (202,280)         (259,886)
          Change in Cash and Cash Equivalents       594,344             7,145
          Cash and Cash Equivalents at
           Beginning of Period                        7,915             9,458
          Effect of Accounting Change on Cash
           and Cash Equivalents                      43,090               ---
          Cash and Cash Equivalents at End of
           Period                                  $645,349           $16,603



    ONEOK, Inc. and Subsidiaries
    INFORMATION AT A GLANCE
                                       Three Months Ended     Six Months Ended
                                            June 30,              June 30,
    (Unaudited)                          2006     2005         2006      2005
                                                  (Millions of dollars)
    Energy Services
    Net margin                          $64.3    $11.2       $167.5     $72.4
    Depreciation, depletion, and
     amortization                        $0.5     $0.6         $1.1      $1.0
    Operating income                    $53.5     $2.9       $146.8     $55.6
    Natural gas marketed (Bcf)            254      275          564       600
    Natural gas gross margin ($/Mcf)    $0.25    $0.02        $0.26     $0.09
    Physically settled volumes (Bcf)      536      574        1,138     1,199
    Capital expenditures                 $---     $---         $---      $---

    Distribution
    Net margin                         $119.6   $106.5       $315.1    $307.7
    Depreciation, depletion, and
     amortization                       $27.2    $30.0        $55.3     $60.0
    Operating income (loss)              $0.9    $(7.0)       $77.7     $73.6
    Customers per employee                709      688          710       687
    Capital expenditures                $41.0    $36.3        $77.7     $64.0
    Natural gas volumes (MMcf)
      Gas Sales                        28,825   30,066      102,962   115,309
      Transportation                   46,553   58,419      103,512   127,590
    Natural gas margins
      Gas Sales                         $96.1    $83.2       $258.9    $251.9
      Transportation                    $15.9    $16.3        $38.3     $41.4

    ONEOK Partners (B)
    Net margin                         $215.2   $114.3       $420.1    $222.8
    Depreciation, depletion, and
     amortization                       $39.3    $13.0        $66.8     $25.7
    Operating income                   $212.6    $56.4       $312.5    $108.4
    Total gas gathered (BBtu/d)         1,142    1,131        1,149     1,121
    Total gas processed (BBtu/d)          993    1,167          958     1,135
    Natural gas liquids gathered
     (MBbl/d)                             213       (A)         203        (A)
    Natural gas liquids sales (MBbl/d)    199       87          203        93
    Natural gas liquids fractionated
     (MBbl/d)                             333       (A)         309        (A)
    Natural gas transported
     (MMcf)                           112,998  108,898      245,533   240,228
    Gas sales (BBtu/d)                    288      353          298       346
    Capital expenditures                $35.8    $14.0        $53.6     $25.2

    (A) - The acquisition of these assets was completed July 1, 2005.
    (B) - ONEOK Partners includes our former Gathering & Processing, Natural
          Gas Liquids, Pipelines & Storage segment information.



    ONEOK, Inc. and Subsidiaries
    REGULATION G GAAP RECONCILIATION

                                                   Six Months Ended
    (Unaudited)                                      June 30, 2006
                                                 (Millions of Dollars)
    Cash provided by operating activities                $788.2
      Accounts and notes receivable                    (1,270.2)
      Inventories                                          (2.1)
      Unrecovered purchased gas costs                      51.1
      Commodity exchanges                                 (29.6)
      Deposits                                              5.7
      Regulatory assets                                   (12.4)
      Accounts payable and accrued
       liabilities                                        841.0
      Energy marketing and risk management
       assets and liabilities                             135.4
      Other assets and liabilities                       (110.9)
    Cash flow, before changes in working
     capital (A)                                         $396.2

    (A) Cash flow from operations, before changes in working capital, is a
        non-GAAP financial measure used by industry analysts, investors,
        lenders, and rating agencies to assess the financial performance and
        the operating results of a company's fundamental business activities.
        Cash flow from operations, before changes in working capital, should
        not be considered in isolation or as a substitute for net income,
        income from operations, or other measures of cash flow.




    ONEOK, Inc. and Subsidiaries                            Attachment A
    Consolidating Income Statement

                                     Three Months Ended June 30, 2006

                                          ONEOK     Consolidating
    (Unaudited)                ONEOK    Partners       Entries    Consolidated
                                          (Millions of dollars)
    Operating Income
       Distribution              $1       $---           $---          $1
       Energy Services           53        ---            ---          53
       ONEOK Partners           ---         99            ---          99
       Gain on sale of assets   ---        114            ---         114
       Other                      2        ---            ---           2
    Operating Income             56        213            ---         269

    Equity in earnings of
     ONEOK Partners              96        ---            (96)        ---
    Other income (expense)        4         16            ---          20
    Minority interest           ---         (1)          (100)       (101)
    Interest expense            (29)       (31)           ---         (60)
    Income Taxes                (51)        (1)           ---         (52)

    Net Income                  $76       $196          $(196)        $76



    ONEOK, Inc. and Subsidiaries                            Attachment B
    EARNINGS GUIDANCE

                                        Year Ending December 31, 2006
                                    Previous       Updated
    (Unaudited)                     Guidance       Guidance        Change
                                    (In millions, except per share amounts)
    Operating Income
    Distribution                      $124           $122            $(2)
    Energy Services                    183            195             12
    ONEOK Partners                     340            363             23
    Gain on sale of assets             108            114              6
    Other                                7              3             (4)
    Operating Income                   762            797             35
    Other income (expense)              96             94             (2)
    Minority interest                 (211)          (208)             3
    Interest expense                  (203)          (224)           (21)
    Income taxes                      (173)          (178)            (5)
    Net Income                        $271           $281            $10

    Diluted Earnings Per Share
     of Common Stock                 $2.33          $2.40          $0.07

    Average Shares of Common Stock -
     Diluted
    Average shares of common stock
     outstanding                     115.0          115.0            ---
    Dilutive components                1.2            2.0            0.8
    Total Average Shares of
     Common Stock - Diluted          116.2          117.0            0.8

    Capital Expenditures
    Distribution                      $148           $148           $---
    Energy Services                    ---            ---            ---
    ONEOK Partners                     168            293            125
    Other                                3              3            ---
    Total Capital Expenditures        $319           $444           $125

    Cash Flow from Operations
    Cash flow from operations
     before changes in working
     capital                          $799           $701           $(98)
    Less: Dividends                    125            138             13
    Less: Distributions to minority
     interests                         163            164              1
    Less: Capital expenditures         319            444            125
    Surplus                           $192           $(45)         $(237)

    Analyst Contact:  Dan Harrison
                      918-588-7950
    Media Contact:    Nancy Owens
                      918-588-7570

OKE-FE


SOURCE ONEOK, Inc.

analysts, Dan Harrison, +1-918-588-7950, or media, Nancy Owens, +1-918-588-7570, both
of ONEOK, Inc.
http://www.prnewswire.com