ONEOK Announces First-quarter 2008 Earnings; Reaffirms 2008 Earnings Guidance

April 30, 2008

TULSA, Okla., April 30 /PRNewswire-FirstCall/ -- ONEOK, Inc. (NYSE: OKE) today announced first-quarter 2008 net income of $143.8 million, or $1.36 per diluted share, compared with $152.9 million, or $1.36 per diluted share, in the same period last year.

"All three business segments turned in solid performances this quarter," said John W. Gibson, ONEOK chief executive officer. "ONEOK Partners had an exceptionally strong quarter, driven by increased volumes, higher commodity prices and wider commodity spreads. Colder weather and increased volumes in our Oklahoma and Kansas service territories benefited our distribution segment. Our energy services segment also performed well in the first quarter, although results are down compared with last year, primarily as a result of lower marketing and storage margins.

"We also increased our ownership of ONEOK Partners to 47.7 percent, providing ONEOK with a larger share of the partnership's current earnings and positioning us for additional future earnings through the $1.6 billion in internally generated growth projects currently under way at the partnership," Gibson added.

ONEOK also reaffirmed its 2008 net income guidance, announced on Jan. 8, 2008, in the range of $2.75 to $3.15 per diluted share.

Operating income for the first quarter 2008 was $333.1 million, compared with $328.3 million for the first quarter 2007. The earnings increase is primarily due to higher realized commodity prices and wider NGL product price spreads in the ONEOK Partners segment, as well as higher volumes. This increase was offset by reduced marketing and storage margins in the energy services segment, driven primarily by colder than anticipated weather.

Operating costs were $193.3 million in the first quarter 2008, compared with $182.3 million in the first quarter 2007, primarily as a result of incremental operating expenses associated with ONEOK Partners' North System, an interstate natural gas liquids and refined petroleum products pipeline system that was acquired in October 2007, as well as costs incurred to comply with regulations and higher employee-related costs.

Equity earnings from investments increased $3.7 million to $27.8 million in the first quarter 2008, compared with the same period in 2007, primarily as a result of higher throughput on Northern Border Pipeline, in which ONEOK Partners has a 50 percent ownership interest.

    FIRST-QUARTER 2008 SUMMARY INCLUDES:

    -- Operating income of $333.1 million, compared with $328.3 million in the
       first quarter last year;
    -- ONEOK Partners segment operating income of $150.5 million, compared
       with $104.4 million in the first quarter 2007;
    -- Distribution segment operating income of $108.5 million, compared with
       $103.2 million in the first quarter 2007;
    -- Energy Services segment operating income of $74.3 million, compared
       with operating income of $120.1 million in the first quarter 2007;
    -- Operating costs of $193.3 million, compared with $182.3 million in the
       first quarter 2007;
    -- Purchasing an additional 5.4 million of ONEOK Partners' common units in
       March 2008 for a total purchase price of approximately $303.2 million,
       and contributing $9.4 million to maintain the 2 percent general partner
       interest.  ONEOK Partners also completed a public offering of 2.5
       million common units at $58.10 per common unit.  Following these
       transactions and the exercise of the over-allotment option in April,
       the company's ownership in ONEOK Partners increased to 47.7 percent;
    -- Distributions declared on the company's general partner interest in
       ONEOK Partners of $19.1 million for the first quarter 2008;
       distributions declared on the company's limited partner interest in
       ONEOK Partners of $44.1 million for the first quarter 2008;
    -- ONEOK, on a stand-alone basis, having $265.6 million in short-term debt
       at March 31, 2008, $35.9 million of cash and cash equivalents and
       $145.6 million of gas in storage;
    -- ONEOK stand-alone total debt representing 48 percent of total
       capitalization, following the retirement of $402.3 million of maturing,
       long-term debt in February 2008;
    -- ONEOK stand-alone cash flow from continuing operations, before changes
       in working capital, of $190.7 million, which exceeded capital
       expenditures and dividends of $112.0 million by $78.7 million;
    -- Receiving approval in April 2008 of $1.1 million in new rates in the
       distribution segment's south Texas territory;
    -- Receiving approval of a capital investment mechanism for the
       distribution segment in Oklahoma that allows for recovery of, and a
       return on, the capital costs incurred between rate cases to expand and
       maintain the natural gas distribution system; and
    -- Declaring a quarterly dividend of 38 cents, an increase of 19 percent
       since January 2007.


    FIRST-QUARTER 2008 BUSINESS UNIT RESULTS

    ONEOK Partners

First-quarter 2008 operating income increased 44 percent to $150.5 million, compared with $104.4 million in the same period last year.

The first-quarter 2008 operating income increase is primarily the result of higher commodity prices in the natural gas gathering and processing business and wider regional NGL product price spreads in the natural gas liquids gathering and fractionation business. Also, both the natural gas and natural gas liquids businesses experienced higher volumes than in the previous year, primarily due to new supply connections and the recently acquired North System.

First-quarter 2008 operating costs were $88.1 million, compared with $75.7 million in the first quarter 2007. The increase is primarily due to incremental operating expenses associated with the recently acquired North System, as well as costs incurred to comply with regulations and higher employee-related costs. Depreciation and amortization increased $2.4 million, compared with the same period last year, also primarily due to the North System acquisition.

Equity earnings from investments for the first quarter 2008 increased to $27.8 million, compared with $24.1 million in the same period a year earlier, primarily as a result of higher throughput from ONEOK Partners' 50 percent interest in Northern Border Pipeline.

Distribution

The distribution segment reported operating income of $108.5 million in the first quarter 2008, compared with operating income of $103.2 million in the first quarter 2007.

First-quarter 2008 earnings increased as a result of colder temperatures and increased volumes in the Oklahoma and Kansas service territories. Transportation volumes were strong in Oklahoma and Kansas and improved margins by $2.5 million. Residential margins were moderated by weather normalization mechanisms and reflect an increase of $1.2 million from the implementation of new rate schedules.

Operating costs decreased to $94.2 million, compared with $95.7 million in the first quarter 2007, primarily as a result of lower employee-related costs.

Energy Services

Energy Services reported first-quarter operating income of $74.3 million, compared with operating income of $120.1 million in the same period in 2007.

The first-quarter 2008 earnings decline is due primarily to a decrease of $47.9 million in marketing and storage margins. Colder than anticipated weather in the first quarter 2008 increased supply requirements of customers, leaving less volume available for the segment's marketing optimization activities. With lower volumes available, combined with steadily increasing natural gas prices, storage optimization margins were also reduced. In addition, financial trading margins were down $7.8 million, partially offset by an increase of $7.0 million in transportation margins and an increase of $2.2 million in retail marketing activities.

Operating costs for the quarter were $10.2 million, relatively flat compared with the same period a year earlier.

At March 31, 2008, total natural gas in storage was 14.6 Bcf, compared with 37.3 Bcf a year earlier. Total natural gas storage capacity under lease was 96 Bcf in the first quarter of 2008, compared with 88 Bcf in the same period 2007.

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


                                                      Three Months Ended
                                                            March 31,
                                                     2008              2007
                                                    (Thousands of dollars)
                 Marketing and storage,
                  gross                           $137,678          $177,106
                 Less:  Storage and
                  transportation costs             (54,275)          (52,713)
                    Marketing and
                     storage, net                   83,403           124,393
                 Retail marketing                    5,213             2,994
                 Financial trading                  (3,751)            4,017
                 Net margin                        $84,865          $131,404


    EARNINGS CONFERENCE CALL AND WEBCAST

ONEOK and ONEOK Partners management will conduct a joint conference call on Thursday, May 1, 2008, 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 866-847-7864, pass code 1226646, 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 1226646.

ONEOK, Inc. (NYSE: OKE) is a diversified energy company. We are the general partner and own 47.7 percent of ONEOK Partners, L.P. (NYSE: OKS), 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 Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities and Exchange Act of 1934, as amended. The forward-looking statements relate to our anticipated financial performance, management's plans and objectives for our future operations, our business prospects, the outcome of regulatory and legal proceedings, market conditions and other matters. We make these forward- looking statements in reliance on the safe harbor protections provided under the Private Securities Litigation Reform Act of 1995. 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," "estimate," "expect," "project," "intend," "plan," "believe," "should," "goal," "forecast," "could," "may," "continue," "might," "potential," "scheduled" and other words and terms of similar meaning.

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:

    -- the effects of weather and other natural phenomena on our operations,
       including energy sales and demand for our services and energy prices;
    -- competition from other United States 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;
    -- the uncertainty of estimates, including accruals and costs of
       environmental remediation;
    -- the timing and extent of changes in energy commodity prices;
    -- the effects of changes in governmental policies and regulatory actions,
       including changes with respect to income and other taxes, environmental
       compliance, and authorized rates or recovery of gas and gas
       transportation costs;
    -- impact on drilling and production by factors beyond our control,
       including the demand for natural gas and refinery-grade crude oil;
       producers' desire and ability to obtain necessary permits; reserve
       performance; and capacity constraints on the pipelines that transport
       crude oil, natural gas and NGLs from producing areas and our
       facilities;
    -- changes in demand for the use of natural gas because of market
       conditions caused by concerns about global warming or changes in
       governmental policies and regulations due to climate change
       initiatives;
    -- 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;
    -- actions by rating agencies concerning the credit ratings of ONEOK and
       ONEOK Partners;
    -- the results of administrative proceedings and litigation, regulatory
       actions and receipt of expected clearances involving the OCC, 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 gathering, 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 and outcome of pending and future litigation;
    -- the ability to market pipeline capacity on favorable terms, including
       the affects of:
        - future demand for and prices of natural gas and NGLs;
        - competitive conditions in the overall energy market;
        - 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;
    -- performance of contractual obligations by our customers, service
       providers, contractors and shippers;
    -- the timely receipt of approval by applicable governmental entities for
       construction and operation of our pipeline and other projects and
       required regulatory clearances;
    -- our ability to acquire all necessary rights-of-way permits and consents
       in a timely manner, to promptly obtain all necessary materials and
       supplies required for construction, and to construct pipelines without
       labor or contractor problems;
    -- the mechanical integrity of facilities operated;
    -- demand for our services in the proximity of our facilities;
    -- our ability to control operating costs;
    -- acts of nature, sabotage, terrorism or other similar acts that cause
       damage to our facilities or our suppliers' or shippers' facilities;
    -- 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 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;
    -- 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 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 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;
    -- our ability to promptly obtain all necessary materials and supplies
       required for construction of gathering, processing, storage,
       fractionation and transportation facilities;
    -- the composition and quality of the natural gas and NGLs we gather and
       process in our plants and transport on our pipelines;
    -- the efficiency of our plants in processing natural gas and extracting
       and fractionating NGLs;
    -- the impact of potential impairment charges;
    -- 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;
    -- our ability to control construction costs and completion schedules of
       our pipelines and other projects; and
    -- the risk factors listed in the reports we have filed and may file with
       the SEC, which are incorporated by reference.

These factors are not necessarily all of the important factors that could cause actual results to differ materially from those expressed in any of our forward-looking statements. Other factors could also have material adverse effects on our future results. These and other risks are described in greater detail in Part I, Item 1A, Risk Factors, in our Annual Report on Form 10-K for the year ended December 31, 2007. All forward-looking statements attributable to us or persons acting on our behalf are expressly qualified in their entirety by these factors. Other than as required under securities laws, we undertake no obligation to update publicly any forward-looking statement whether as a result of new information, subsequent events or change in circumstances, expectations or otherwise. OKE-FE

     Analyst Contact:  Dan Harrison
                       918-588-7950

     Media Contact:    Megan Washbourne
                       918-588-7572


    ONEOK, Inc. and Subsidiaries
    CONSOLIDATED STATEMENTS OF INCOME
                                                       Three Months Ended
                                                            March 31,
    (Unaudited)                                       2008             2007
    Revenues                                         (Thousands of dollars,
                                                    except per share amounts)
    Operating revenues, excluding energy
     trading revenues                           $4,918,031        $3,804,860
    Energy trading revenues, net                   (15,955)            1,348
    Total Revenues                               4,902,076         3,806,208
    Cost of sales and fuel                       4,316,164         3,241,358
    Net Margin                                     585,912           564,850
    Operating Expenses
      Operations and maintenance                   167,992           158,643
      Depreciation and amortization                 59,479            56,450
      General taxes                                 25,331            23,659
    Total Operating Expenses                       252,802           238,752
    Gain on sale of assets                              13             2,203
    Operating Income                               333,123           328,301
    Equity earnings from investments                27,783            24,055
    Allowance for equity funds used
     during construction                             8,496             1,337
    Other income                                     3,232             5,004
    Other expense                                   (4,608)             (645)
    Interest expense                               (62,861)          (62,012)
    Income before Minority Interests and
     Income Taxes                                  305,165           296,040
    Minority interests in income of
     consolidated subsidiaries                     (68,960)          (45,313)
    Income taxes                                   (92,368)          (97,847)
      Net Income                                  $143,837          $152,880

    Earnings Per Share of Common Stock
      Net Earnings Per Share, Basic                  $1.38             $1.38
      Net Earnings Per Share, Diluted                $1.36             $1.36

    Average Shares of Common Stock
     (Thousands)
      Basic                                        104,170           110,868
      Diluted                                      105,821           112,724

    Dividends Declared Per Share of
     Common Stock                                    $0.38             $0.34



    ONEOK, Inc. and Subsidiaries
    CONSOLIDATED BALANCE SHEETS
                                                 March 31,        December 31,
    (Unaudited)                                     2008               2007
    Assets                                         (Thousands of dollars)

    Current Assets
      Cash and cash equivalents                   $268,740           $19,105
      Trade accounts and notes receivable,
       net                                       1,723,572         1,723,212
      Gas and natural gas liquids in
       storage                                     329,307           841,362
      Commodity exchanges and imbalances            75,302            82,938
      Energy marketing and risk management
       assets                                      129,049           168,609
      Other current assets                         216,694           116,249
        Total Current Assets                     2,742,664         2,951,475

    Property, Plant and Equipment
      Property, plant and equipment              8,297,604         7,893,492
      Accumulated depreciation and
       amortization                              2,091,337         2,048,311
        Net Property, Plant and Equipment        6,206,267         5,845,181

    Investments and Other Assets
      Goodwill and intangible assets             1,041,857         1,043,773
      Energy marketing and risk management
       assets                                        7,180             3,978
      Investments in unconsolidated
       affiliates                                  754,304           756,260
      Other assets                                 487,562           461,367
        Total Investments and Other Assets       2,290,903         2,265,378

          Total Assets                         $11,239,834       $11,062,034



    ONEOK, Inc. and Subsidiaries
    CONSOLIDATED BALANCE SHEETS
                                                 March 31,        December 31,
    (Unaudited)                                    2008              2007
    Liabilities and Shareholders'                  (Thousands of dollars)
     Equity

    Current Liabilities
      Current maturities of long-term debt        $118,181          $420,479
      Notes payable                                265,600           202,600
      Accounts payable                           1,585,757         1,436,005
      Commodity exchanges and imbalances           219,773           252,095
      Energy marketing and risk management
       liabilities                                 244,632           133,903
      Other current liabilities                    445,064           436,585
        Total Current Liabilities                2,879,007         2,881,667

    Long-term Debt, excluding current
     maturities                                  4,118,394         4,215,046

    Deferred Credits and Other
     Liabilities
      Deferred income taxes                        720,733           680,543
      Energy marketing and risk management
       liabilities                                  64,256            26,861
      Other deferred credits                       485,190           486,645
      Total Deferred Credits and Other
       Liabilities                               1,270,179         1,194,049

    Commitments and Contingencies

    Minority Interests in Consolidated
     Subsidiaries                                  965,462           801,964

    Shareholders' Equity
      Common stock, $0.01 par value:
       authorized 300,000,000 shares; issued
       121,380,458 shares and outstanding
       104,252,433 shares at March 31, 2008;
       issued 121,115,217 shares and
       outstanding 103,987,476 shares at
       December 31, 2007                             1,214             1,211
      Paid in capital                            1,275,103         1,273,800
      Accumulated other comprehensive
       income (loss)                               (75,177)           (7,069)
      Retained earnings                          1,515,793         1,411,492
      Treasury stock, at cost: 17,128,025
       shares at March 31, 2008 and
       17,127,741 shares at
       December 31, 2007                          (710,141)         (710,126)
        Total Shareholders' Equity               2,006,792         1,969,308

          Total Liabilities and
           Shareholders' Equity                $11,239,834       $11,062,034



    ONEOK, Inc. and Subsidiaries
    CONSOLIDATED STATEMENTS OF CASH FLOWS

                                                      Three Months Ended
                                                           March 31,
    (Unaudited)                                     2008              2007
    Operating Activities                             (Thousands of dollars)
      Net income                                  $143,837          $152,880
      Depreciation and amortization                 59,479            56,450
      Allowance for funds used during
       construction                                 (8,496)           (1,337)
      Gain on sale of assets                           (13)           (2,203)
      Minority interests in income of
       consolidated subsidiaries                    68,960            45,313
      Equity earnings from investments             (27,783)          (24,055)
      Distributions received from
       unconsolidated affiliates                    24,040            26,455
      Deferred income taxes                         29,362            19,499
      Stock-based compensation expense               7,982             8,641
      Allowance for doubtful accounts                2,035             1,974
      Changes in assets and liabilities
       (net of acquisition and disposition
       effects):
        Trade accounts and notes receivable         (7,065)           60,072
        Gas and natural gas liquids in
         storage                                   488,214           426,136
        Deposits                                   (52,052)           79,641
        Accounts payable                           119,795            (3,020)
        Commodity exchanges and imbalances,
         net                                       (24,686)           (7,468)
        Accrued interest                            50,293            44,756
        Energy marketing and risk management
         assets and liabilities                     90,433            61,128
        Other assets and liabilities               (93,820)          (75,569)
        Cash Provided by Operating Activities      870,515           869,293
    Investing Activities
      Changes in investments in
       unconsolidated affiliates                     3,311              (141)
      Capital expenditures (less allowance
       for equity funds used during
       construction)                              (339,531)         (102,135)
      Changes in short-term investments                  -          (506,905)
      Proceeds from sale of assets                     161             3,707
      Other                                          2,450                 -
        Cash Used in Investing Activities         (333,609)         (605,474)
    Financing Activities
      Borrowing (repayment) of notes
       payable, net                                 63,000            (6,000)
      Payment of debt                             (405,504)             (520)
      Repurchase of common stock                       (15)          (20,089)
      Issuance of common stock                       1,533             2,702
      Issuance of common units, net of
       discounts                                   140,369                 -
      Dividends paid                               (39,536)          (37,691)
      Distributions to minority interests          (47,118)          (44,979)
        Cash Used in Financing Activities         (287,271)         (106,577)
          Change in Cash and Cash Equivalents      249,635           157,242
          Cash and Cash Equivalents at
           Beginning of Period                      19,105            68,268
          Cash and Cash Equivalents at End of
           Period                                 $268,740          $225,510



    ONEOK, Inc. and Subsidiaries
    INFORMATION AT A GLANCE
                                                      Three Months Ended
                                                           March 31,
    (Unaudited)                                      2008              2007
                                                      (Millions of dollars)
    ONEOK Partners
    Net margin                                      $268.5            $205.4
    Operating costs                                  $88.1             $75.7
    Depreciation and amortization                    $29.9             $27.5
    Operating income                                $150.5            $104.4
    Natural gas gathered (BBtu/d)                    1,192             1,168
    Natural gas processed (BBtu/d)                     624               609
    Natural gas transported (MMcf/d)                 3,956             3,948
    Natural gas sales (BBtu/d)                         277               268
    Natural gas liquids gathered (MBbl/d)              251               210
    Natural gas liquids sales (MBbl/d)                 286               220
    Natural gas liquids fractionated
     (MBbl/d)                                          391               319
    Natural gas liquids transported
     (MBbl/d)                                          303               205
    Capital expenditures                            $267.1             $74.6
    Conway-to-Mount Belvieu OPIS average
     spread Ethane/Propane mixture ($/gallon)        $0.09             $0.06
    Natural Gas Gathering and Processing:
    Realized composite NGL sales prices
     ($/gallon)                                      $1.33             $0.82
    Realized condensate sales price
     ($/Bbl)                                        $87.51            $56.53
    Realized natural gas sales price
     ($/MMBtu)                                       $7.40             $6.58
    Realized gross processing spread
     ($/MMBtu)                                       $7.43             $3.59

    Distribution
    Net margin                                      $231.7            $227.2
    Operating costs                                  $94.2             $95.7
    Depreciation and amortization                    $29.0             $28.3
    Operating income                                $108.5            $103.2
    Customers per employee                             732               745
    Capital expenditures                             $30.6             $25.4
    Natural gas volumes (Bcf)
      Gas Sales                                       80.9              78.8
      Transportation                                  62.1              57.6
    Natural gas margins
      Gas Sales                                     $194.0            $193.5
      Transportation                                 $27.3             $24.7

    Energy Services
    Net margin                                       $84.9            $131.4
    Operating costs                                  $10.2             $10.7
    Depreciation and amortization                     $0.4              $0.5
    Operating income                                 $74.3            $120.1
    Natural gas marketed (Bcf)                         340               337
    Natural gas gross margin ($/Mcf)                 $0.17             $0.34
    Physically settled volumes (Bcf)                   636               639



    ONEOK, Inc. and Subsidiaries
    Consolidating Income Statement
                                   Three Months Ended March 31, 2008
                                          ONEOK     Consolidating
    (Unaudited)              ONEOK       Partners      Entries    Consolidated
                                       (Millions of dollars)

    Operating Income
      ONEOK Partners            $-         $151           $-         $151
      Distribution             109            -            -          109
      Energy Services           74            -            -           74
      Other                     (1)           -            -           (1)
    Operating Income           182          151            -          333

    Equity in earnings of
     ONEOK Partners             76            -          (76)           -
    Other income (expense)      (1)          36            -           35
    Interest expense           (24)         (39)           -          (63)
    Minority interest            -            -          (69)         (69)
    Income taxes               (89)          (3)           -          (92)
    Net Income                $144         $145        $(145)        $144



                                   Three Months Ended March 31, 2007
                                         ONEOK      Consolidating
    (Unaudited)               ONEOK     Partners       Entries    Consolidated
                                       (Millions of dollars)
    Operating Income
      ONEOK Partners            $-         $104           $-         $104
      Distribution             103            -            -          103
      Energy Services          120            -            -          120
      Other                      1            -            -            1
    Operating Income           224          104            -          328

    Equity in earnings of
     ONEOK Partners             51            -          (51)           -
    Other income                 3           27            -           30
    Interest expense           (30)         (32)           -          (62)
    Minority interest            -            -          (45)         (45)
    Income taxes               (95)          (3)           -          (98)
    Net Income                $153          $96         $(96)        $153



    ONEOK, Inc. and Subsidiaries
    REGULATION G GAAP RECONCILIATION
    ONEOK, Inc. Stand-Alone Cash Flow, Before Changes in Working Capital

                                                      Three Months Ended
    (Unaudited)                                         March 31, 2008
                                                     (Millions of dollars)
    Net income                                              $143.8
    Depreciation and amortization                             29.5
    Distributions received from
     unconsolidated affiliates                                54.1
    Income from equity investments, net                      (76.1)
    Deferred income taxes                                     29.4
    Stock based compensation expense                           8.0
    Allowance for doubtful accounts                            2.0
    Cash flow, before changes in working
     capital (a)                                            $190.7

    (a) ONEOK, Inc. stand-alone cash flow, before changes in working capital,
        is a non-GAAP financial measure used by management, industry analysts,
        investors, lenders, and rating agencies to assess the financial
        performance and the operating results of our fundamental business
        activities.  ONEOK, Inc. stand-alone cash flow, 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.
SOURCE  ONEOK, Inc.
    -0-                             04/30/2008
    /CONTACT:  Analysts, Dan Harrison, +1-918-588-7950, or Media, Megan
Washbourne, +1-918-588-7572, both of ONEOK, Inc./
    /Web site:  http://www.oneok.com /
    (OKE OKS)

CO:  ONEOK, Inc.; ONEOK Partners, L.P.
ST:  Oklahoma
IN:  OIL
SU:  ERN ERP CCA

KS-DE
-- LAW054 --
5002 04/30/2008 16:10 EDT http://www.prnewswire.com