TULSA, Okla., Jan. 28 /PRNewswire-FirstCall/ -- ONEOK, Inc. (NYSE: OKE) and ONEOK Partners, L.P. (NYSE: OKS) will release their fourth-quarter and year-end 2009 earnings after the market closes on Feb. 22, 2010.

A joint conference call will be held the following day on Feb. 23, 2010, at 11 a.m. Eastern Standard Time (10 a.m. Central Standard Time). The call also will be carried live on ONEOK's and ONEOK Partners' Web sites.

ONEOK's and ONEOK Partners' senior management teams will participate in the call and webcast.



    What:      ONEOK, Inc. and ONEOK Partners fourth-quarter and year-end 2009
               earnings conference call and webcast

    When:     11 a.m. Eastern, Feb. 23, 2010
              10 a.m. Central

    Where:    1) Phone conference call 866-814-1913, pass code 1427228
              2) Log on to the webcast at www.oneok.com
              3) Log on to the webcast at 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, www.oneok.com, and ONEOK Partners' Web site, 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 224735.

Additionally, conference calls and webcasts for the first, second and third quarters of 2010 have been scheduled.

    --  First quarter 2010: News release issued - April 28, 2010; Conference
        call and webcast - April 29, 2010;
    --  Second quarter 2010: News release issued - Aug. 3, 2010; Conference call
        and webcast - Aug. 4, 2010;
    --  Third quarter 2010: News release issued - Nov. 2, 2010; Conference call
        and webcast - Nov. 3, 2010.

Each quarterly earnings news release will be issued following the close of market on the date indicated.

Each quarterly conference call and webcast will take place at 11 a.m. Eastern Time (10 a.m. Central Time) on the date indicated. Conference call dial-in information will be provided at a later date.

ONEOK, Inc. (NYSE: OKE) is a diversified energy company. We are the general partner and own 45.1 percent of ONEOK Partners, L.P. (NYSE: OKS), one of the largest publicly traded master 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 NGL supply in the Mid-Continent and Rocky Mountain regions 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.

ONEOK Partners, L.P. (NYSE: OKS) is one of the largest publicly traded master limited partnerships, and 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 NGL supply in the Mid-Continent and Rocky Mountain regions with key market centers. Its general partner is a wholly owned subsidiary of ONEOK, Inc. (NYSE: OKE), a diversified energy company, which owns 45.1 percent of the overall partnership interest. ONEOK is one of the largest natural gas distributors in the United States, and its energy services operation focuses primarily on marketing natural gas and related services throughout the U.S.

For more information, visit the Web sites at www.oneok.com or www.oneokpartners.com.



    Analyst Contact:     Dan Harrison
                         918-588-7950
    Media Contact:       Brad Borror
                         918-588-7582

OKE-FV

OKS-FV

SOURCE ONEOK, Inc.; ONEOK Partners, L.P.