----

| November 1, 2011 |   | Analyst Contact: | Andrew Ziola |
|------------------|--------|------------------|--------------|
|             |   |             | 918-588-7163 |
|             |   | Media Contact:   | Brad Borror  |
|             |   |             | 918-588-7582 |

----

----

| ·   | Operating income of $242.4 million, compared with $160.5 million in the third quarter 2010; |
|--------------------|---------------------------------------------------------------------------------------------|

| ·   | Natural gas gathering and processing segment operating income of $51.8 million, compared with $38.2 million in the third quarter 2010; |
|--------------------|----------------------------------------------------------------------------------------------------------------------------------------|

| ·   | Natural gas pipelines segment operating income of $34.0 million, compared with $39.0 million in the third quarter 2010; |
|--------------------|-------------------------------------------------------------------------------------------------------------------------|

| ·   | Natural gas liquids segment operating income of $157.1 million, compared with $83.2 million in the third quarter 2010; |
|--------------------|------------------------------------------------------------------------------------------------------------------------|

| ·   | Equity earnings from investments of $32.0 million, compared with $29.4 million in the third quarter 2010; |
|--------------------|-----------------------------------------------------------------------------------------------------------|

| ·   | Capital expenditures of $252.2 million, compared with $104.1 million in the third quarter 2010; |
|--------------------|-------------------------------------------------------------------------------------------------|

| ·   | Having $127.9 million of cash and cash equivalents and no commercial paper or borrowings outstanding as of Sept. 30, 2011, under the partnership’s $1.2 billion revolving credit facility; |
|--------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | Completing a two-for-one split of the partnership’s common units and Class B units on July 12, 2011, with the distribution of one unit for each unit outstanding.  As a result, the partnership now has 130,827,354 common units and 72,988,252 Class B units outstanding, and its minimum quarterly distribution and target distribution levels have been adjusted proportionately; |
|--------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | Entering into in August a new $1.2 billion, five-year senior unsecured revolving credit facility that expires in August 2016; and |
|--------------------|-----------------------------------------------------------------------------------------------------------------------------------|

----

| ·   | On a split-adjusted basis, increasing the quarterly cash distribution to 59.5 cents per unit from 58.5 cents per unit, payable on Nov. 14, 2011, to unitholders of record as of Nov. 7, 2011, resulting in an annualized cash distribution of $2.38 per unit. |
|--------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

----

| ·   | Natural gas gathered totaled 1,044 billion British thermal units per day (BBtu/d) in the third quarter 2011, relatively unchanged compared with the same period last year due to continued production declines in the Powder River Basin in Wyoming and certain parts of Kansas, offset partially by increased drilling activity in the Williston Basin; and up 2 percent compared with the second quarter 2011; |
|--------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | Natural gas processed totaled 723 BBtu/d in the third quarter 2011, up 8 percent compared with the same period last year due to increased drilling activity in the Williston Basin, offset partially by natural production declines in Kansas; and up 6 percent compared with the second quarter 2011; |
|--------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | The realized composite NGL net sales price was $1.09 per gallon in the third quarter 2011, up 25 percent compared with the same period last year; and unchanged compared with the second quarter 2011; |
|--------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | The realized condensate net sales price was $87.89 per barrel in the third quarter 2011, up 35 percent compared with the same period last year; and up 7 percent compared with the second quarter 2011; |
|--------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | The realized residue gas net sales price was $5.25 per million British thermal units (MMBtu) in the third quarter 2011, down 6 percent compared with the same period last year; and down 9 percent compared with the second quarter 2011; and |
|--------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | The realized gross processing spread was $8.17 per MMBtu in the third quarter 2011, up 44 percent compared with the same period last year; and down 3 percent compared with the second quarter 2011. |
|--------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

----

|                                                                           |                                                                                          | Three Months Ended                                                                            |                                                                          | Nine Months Ended                                                                             |                                                                          |
|--------------------------------------------------------------------------------|-----------------------------------------------------------------------------------------------|-----------------------------------------------------------------------------------------------|-------------------------------------------------------------------------------|-----------------------------------------------------------------------------------------------|-------------------------------------------------------------------------------|
|                                                                           |                                                                                          | September 30,                                                                                 |                                                                          | September 30,                                                                                 |                                                                          |
| Operating Information (a)                                                      |                                                                                          | 2011                                                                                          |                                                                          | 2010                                                                                          |                                                                          | 2011 |   | 2010 |   |
| Percent of proceeds                                                            |                                                                                          |                                                                                          |                                                                          |                                                                                          |                                                                          |   |   |   |   |
|   NGL sales (Bbl/d)                                                  |                                                                                          |             6,963                 |                                                                          |             6,966                 |                                                                          |             6,433 |   |             5,933 |   |
|   Residue gas sales (MMBtu/d)                                        |                                                                                          |           52,038                            |                                                                          |           40,603                            |                                                                          |           46,702 |   |           40,852 |   |
|   Condensate sales (Bbl/d)                                           |                                                                                          |             1,401                 |                                                                          |             1,482                 |                                                                          |             1,754 |   |             1,761 |   |
|   Percentage of total net margin                                     |                                                                                          | 63%                                                                                           |                                                                          | 56%                                                                                           |                                                                          | 61% |   | 55% |   |
| Fee-based                                                                      |                                                                                          |                                                                                          |                                                                          |                                                                                          |                                                                          |   |   |   |   |
|   Wellhead volumes (MMBtu/d)                                         |                                                                                          |      1,044,385                                                       |                                                                          |      1,046,475                                                       |                                                                          |      1,020,871 |   |      1,075,491 |   |
|   Average rate ($/MMBtu)                                             |                                                                                          |  $           0.35                 |                                                                          |  $           0.31                 |                                                                          |  $           0.34 |   |  $           0.31 |   |
|   Percentage of total net margin                                     |                                                                                          | 31%                                                                                           |                                                                          | 35%                                                                                           |                                                                          | 32% |   | 35% |   |
| Keep-whole                                                                     |                                                                                          |                                                                                          |                                                                          |                                                                                          |                                                                          |   |   |   |   |
|   NGL shrink (MMBtu/d) (b)                                           |                                                                                          |             9,145                 |                                                                          |           13,443                            |                                                                          |           10,753 |   |           13,800 |   |
|   Plant fuel (MMBtu/d) (b)                                           |                                                                                          |                973 |                                                                          |             1,667                 |                                                                          |             1,193 |   |             1,639 |   |
|   Condensate shrink (MMBtu/d) (b)                                    |                801 |                                                                                          |             1,222 |                                                                                          |             1,204 |   |             1,531 |   |
|   Condensate sales (Bbl/d)                                           |                                                                                          |                162 |                                                                          |                247 |                                                                          |                244 |   |                310 |   |
|   Percentage of total net margin                                     |                                                                                          | 6%                                                                                            |                                                                          | 9%                                                                                            |                                                                          | 7% |   | 10% |   |
| (a) - Includes volumes for consolidated entities only.                         |                                                                                          |                                                                                          |                                                                          |                                                                                          |                                                                          |   |   |
| (b) - Refers to the Btus that are removed from natural gas through processing. |                                                                                          |                                                                                          |                                                                          |

----

|                                 | Three Months Ending |
|--------------------------------------|---------------------|
|                                 | December 31, 2011   |
|                                 | Volumes Hedged      | Average Price |   | Percentage Hedged |
| NGLs (Bbl/d) (a)                     | 5,075               |   | $1.19 |  / gallon | 56% |
| Condensate (Bbl/d) (a)               | 1,838               |   | $2.15 |  / gallon |   | 77% |
| Total (Bbl/d)                        | 6,913               |   | $1.45 |  / gallon |   | 60% |
| Natural gas (MMBtu/d)                | 24,457              |   | $5.78 |  / MMBtu | 63% |
| (a) - Hedged with fixed-price swaps. |                |   |   |   |   |   |
|                                 |                |   |   |   |   |   |
|                                 |                |   |   |   |   |   |
|                                 | Year Ending         |
|                                 | December 31, 2012   |
|                                 | Volumes Hedged      | Average Price |   | Percentage Hedged |
| NGLs (Bbl/d) (a)                     | 5,169               |   | $1.61 |  / gallon | 43% |
| Condensate (Bbl/d) (a)               | 1,819               |   | $2.43 |  / gallon |   | 73% |
| Total (Bbl/d)                        | 6,988               |   | $1.82 |  / gallon |   | 48% |
| Natural gas (MMBtu/d)                | 25,301              |   | $5.09 |  / MMBtu | 42% |
| (a) - Hedged with fixed-price swaps. |                |   |   |   |   |   |
|                                 |                |   |   |   |   |   |
|                                 | Year Ending         |
|                                 | December 31, 2013   |
|                                 | Volumes Hedged      | Average Price |   | Percentage Hedged |
| NGLs (Bbl/d) (a)                     | 367                 |   | $2.55 |  / gallon | 2% |
| Condensate (Bbl/d) (a)               | 649                 |   | $2.55 |  / gallon |   | 23% |
| Total (Bbl/d)                        | 1,016               |   | $2.55 |  / gallon |   | 4% |
| (a) - Hedged with fixed-price swaps. |                |   |   |   |   |   |

----

| ·   | Natural gas transportation capacity contracted totaled 5,132 thousand dekatherms per day in the third quarter 2011, down 6 percent compared with the same period last year due primarily to lower contracted capacity on Midwestern Gas Transmission resulting from narrower natural gas price location differentials; and down 3 percent compared with the second quarter 2011; |
|--------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | Natural gas transportation capacity subscribed was 79 percent in the third quarter 2011 compared with 84 percent subscribed for the same period last year; and down from 82 percent in the second quarter 2011; and |
|--------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | The average natural gas price in the Mid-Continent region was $4.02 per MMBtu in the third quarter 2011, up 2 percent compared with the same period last year; and down 4 percent compared with the second quarter 2011. |
|--------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

----

| ·   | An $89.4 million increase due to favorable NGL price differentials and increased NGL fractionation and transportation capacity available for optimization activities between the Mid-Continent and Gulf-Coast markets; |
|--------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | A $7.9 million increase from higher NGL volumes gathered and fractionated, and favorable contract renegotiations associated with its exchange-services activities; |
|--------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | A $7.3 million increase in isomerization margins from wider price differentials between normal butane and iso-butane, and higher isomerization volumes; and |
|--------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | A $3.1 million increase due to higher storage margins as a result of favorable contract renegotiations. |
|--------------------|---------------------------------------------------------------------------------------------------------|

| ·   | A $207.4 million increase as a result of favorable NGL price differentials and increased NGL fractionation and transportation capacity available for optimization activities between the Mid-Continent and Gulf-Coast markets; |
|--------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | A $29.6 million increase from higher NGL volumes gathered and fractionated, and favorable contract renegotiations associated with its exchange-services activities; |
|--------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | A $12.8 million increase in isomerization margins from wider price differentials between normal butane and iso-butane, and higher isomerization volumes; and |
|--------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | A $9.2 million increase due to higher storage margins as a result of favorable contract renegotiations. |
|--------------------|---------------------------------------------------------------------------------------------------------|

----

| ·   | NGLs fractionated totaled 529 thousand barrels per day (MBbl/d) in the third quarter 2011, up 6 percent compared with the same period last year due primarily to increased production through existing supply connections in Texas and the Mid-Continent and Rocky Mountain regions, and new supply connections in the Mid-Continent and Rocky Mountain regions; and down 2 percent compared with the second quarter 2011; |
|--------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | NGLs transported on gathering lines totaled 443 MBbl/d in the third quarter 2011, up 15 percent compared with the same period last year, after adjusting for the September 2010 deconsolidation of Overland Pass Pipeline, due primarily to increased production through existing supply connections in Texas and the Mid-Continent and Rocky Mountain regions, and new supply connections in the Mid-Continent and Rocky Mountain regions; and up 3 percent compared with the second quarter 2011; |
|--------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | NGLs transported on distribution lines totaled 457 MBbl/d in the third quarter 2011, relatively unchanged compared with the same period last year ; and down 1 percent compared with the second quarter 2011; and |
|--------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | The Conway-to-Mont Belvieu average price differential for ethane, based on Oil Price Information Service (OPIS) pricing, was 27 cents per gallon in the third quarter 2011, up |
|--------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

----

|    | 170 percent compared with the same period last year; and up 35 percent compared with the second quarter 2011. |
|--------------|---------------------------------------------------------------------------------------------------------------|

| ·   | Approximately $910 million to $1.2 billion for natural gas liquids projects that have approximately two-thirds of the available capacity committed and include: |
|--------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------|

| -   | The construction of a 570-plus-mile, 16-inch NGL pipeline, the Sterling III Pipeline,  expected to cost approximately $610 million to $810 million and is expected to be completed in late 2013, to transport either unfractionated NGLs or NGL purity products from the Mid-Continent region to the Texas Gulf Coast with the initial capacity to transport 193,000 bpd and the ability to expand to 250,000 bpd; |
|---------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| -   | The reconfiguration of its existing Sterling I and II NGL distribution pipelines to transport either unfractionated NGLs or NGL purity products; and |
|---------------|------------------------------------------------------------------------------------------------------------------------------------------------------|

| -   | The construction of a new 75,000 bpd natural gas liquids fractionator, MB-2, at Mont Belvieu, Texas, that is expected to cost approximately $300 million to $390 million and is expected to be completed in mid-2013; |
|---------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | Approximately $350 million to $415 million to construct the Garden Creek plant, a new 100 million cubic feet per day (MMcf/d) natural gas processing facility in the Bakken Shale in the Williston Basin in North Dakota, which is expected to be in service by the end of 2011, and related expansions; and for new well connections, expansions and upgrades to the existing natural gas gathering system infrastructure; |
|--------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | Approximately $300 million to $355 million by the end of 2012 to construct the Stateline I plant, a new 100 MMcf/d natural gas processing facility in the Bakken Shale in the Williston Basin in North Dakota, which is expected to be in service in the third quarter of 2012, and related NGL infrastructure;  expansions and upgrades to the existing gathering and compression infrastructure; and new well connections; |
|--------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | Approximately $260 million to $305 millionby the end of 2014 to construct the Stateline II plant, a new 100 MMcf/d natural gas processing facility in the Bakken Shale in the Williston Basin in North Dakota, which is expected to be in service in the first half of 2013; expansions and upgrades to the existing gathering and compression infrastructure; and new well connections; |
|--------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | Approximately $595 million to $730 million of natural gas liquids projects that have 100-percent volume commitments and include: |
|--------------------|----------------------------------------------------------------------------------------------------------------------------------|

| -   | The construction of a 525- to 615-mile NGL pipeline to transport unfractionated NGLs produced from the Bakken Shale in the Williston Basin to the Overland |
|---------------|------------------------------------------------------------------------------------------------------------------------------------------------------------|

----

|   | Pass Pipeline, a 760-mile NGL pipeline extending from southern Wyoming to Conway, Kan., which is expected to be in service during the first half of 2013, with the initial capacity to transport 60,000 bpd and can be expanded to 110,000 bpd with additional pump stations; |
|--------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| -   | A 60,000 bpd capacity expansion on ONEOK Partners’ 50-percent interest in the Overland Pass Pipeline to transport the additional unfractionated NGL volumes from the new Bakken Pipeline; and |
|---------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| -   | A 60,000 bpd expansion of the partnership’s fractionation capacity at Bushton, Kan., which is expected to be in service during the first half of 2013, to accommodate the additional NGL volumes; |
|---------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | Approximately $180 million to $240 millionto construct more than 230 miles of 10- and 12-inch diameter NGL pipelines that will expand the partnership's existing Mid-Continent NGL gathering system in the Cana-Woodford and Granite Wash areas, which, when completed, is expected to add approximately 75,000 to 80,000 bpd of raw, unfractionated NGLs to the partnership's existing NGL gathering systems in the Mid-Continent and the Arbuckle Pipeline. These investments are expected to be completed in the first half of 2012 and will connect three new third-party natural gas processing facilities with total expected capacity of 510 MMcf/d and three existing third-party natural gas processing facilities that are being expanded; and include the installation of additional pump stations on the Arbuckle Pipeline to increase its capacity to 240,000 bpd; and |
|--------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| ·   | Approximately $36 million for the installation of seven additional pump stations along the existing Sterling I NGL distribution pipeline, increasing its capacity by 15,000 bpd that will be supplied by Mid-Continent NGL infrastructure.  Installation began last year, and all of the pump stations are expected to be in service by the end of November 2011. |
|--------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

----

----

----

----

| • | the effects of weather and other natural phenomena, including climate change, on our operations, demand for our services and energy prices; |
|---------|---------------------------------------------------------------------------------------------------------------------------------------------|

| • | competition from other United States and foreign energy suppliers and transporters, as well as alternative forms of energy, including, but not limited to, solar power, wind power, geothermal energy and biofuels such as ethanol and biodiesel; |
|---------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| • | the capital intensive nature of our businesses; |
|---------|-------------------------------------------------|

| • | the profitability of assets or businesses acquired or constructed by us; |
|---------|--------------------------------------------------------------------------|

| • | our ability to make cost-saving changes in operations; |
|---------|--------------------------------------------------------|

| • | 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, pipeline safety, environmental compliance, climate change initiatives and authorized rates of recovery of natural gas and natural gas transportation costs; |
|---------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| • | the impact on drilling and production by factors beyond our control, including the demand for natural gas and 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; |
|---------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| • | difficulties or delays experienced by trucks or pipelines in delivering products to or from our terminals or pipelines; |
|---------|-------------------------------------------------------------------------------------------------------------------------|

| • | changes in demand for the use of natural gas because of market conditions caused by concerns about global warming; |
|---------|--------------------------------------------------------------------------------------------------------------------|

| • | conflicts of interest between us, our general partner, ONEOK Partners GP, and related parties of ONEOK Partners GP; |
|---------|---------------------------------------------------------------------------------------------------------------------|

| • | the impact of unforeseen changes in interest rates, equity markets, inflation rates, economic recession and other external factors over which we have no control; |
|---------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| • | our indebtedness could make us vulnerable to general adverse economic and industry conditions, limit our ability to borrow additional funds and/or place us at competitive disadvantages compared with our competitors that have less debt or have other adverse consequences; |
|---------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| • | actions by rating agencies concerning the credit ratings of us or the parent of our general partner; |
|---------|------------------------------------------------------------------------------------------------------|

| • | the results of administrative proceedings and litigation, regulatory actions, rule changes and receipt of expected clearances involving the Oklahoma Corporation Commission (OCC), Kansas Corporation Commission (KCC), Texas regulatory authorities or any other local, state or federal regulatory body, including the Federal Energy Regulatory Commission (FERC), the National Transportation Safety Board (NTSB), the Pipeline and Hazardous Materials Safety Administration (PHMSA), the Environmental Protection Agency (EPA) and the Commodity Futures Trading Commission (CFTC); |
|---------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

----

| • | 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 that outpace new drilling; |
|---------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| • | the risk that material weaknesses or significant deficiencies in our internal control 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 effects 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; and |
|--------|----------------------------------------------------------------------------------------------|

|   |     - availability of additional storage capacity; |
|--------|-------------------------------------------------------------------|

| • | 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 permits, consents and other approvals in a timely manner, to promptly obtain all necessary materials and supplies required for construction, and to construct gathering, processing, storage, fractionation and transportation facilities 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 prolonged slowdown in growth or decline in the United States or international economies, including liquidity risks in United States or foreign credit markets; |
|---------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| • | the impact of recently issued and future accounting updates 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 impact of uncontracted capacity in our assets 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; |
|---------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| • | 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 Securities and Exchange Commission (SEC), which are incorporated by reference. |
|---------|-----------------------------------------------------------------------------------------------------------------------------------------------------------|

----

| ONEOK Partners, L.P. and Subsidiaries                                |   |                                                  |      |   |              |   |      |   |   |   |      |   |
|----------------------------------------------------------------------|--------|-------------------------------------------------------|-----------|--------|-------------------|--------|-----------|--------|--------|--------|-----------|--------|
| CONSOLIDATED STATEMENTS OF INCOME                                    |   |                                                  |      |   |              |   |      |   |   |   |      |   |
|                                                                 |   | Three Months Ended                                    |      |   | Nine Months Ended |   |
|                                                                 |   | September 30,                                         |      |   | September 30,     |   |
| (Unaudited)                                                          |   | 2011                                                  |      |   | 2010              |   |      | 2011   |   |   | 2010      |   |
|                                                                 |   |  (Thousands of dollars, except per unit amounts) |      |
|                                                                 |   |                                                  |      |   |              |   |      |   |   |   |      |   |
| Revenues                                                             |   | $                                                     | 2,903,576 |   |              | $      | 2,070,144 |   |   | $      | 8,187,405 |   |   | $ | 6,329,271 |   |
| Cost of sales and fuel                                               |   |                                                  | 2,509,570 |   |              |   | 1,784,139 |   |   |   | 7,104,305 |   |   |   | 5,493,979 |   |
| Net margin                                                           |   |                                                  | 394,006   |   |              |   | 286,005   |   |   |   | 1,083,100 |   |   |   | 835,292 |   |
| Operating expenses                                                   |   |                                                  |      |   |              |   |      |   |   |   |      |   |   |   |   |   |
| Operations and maintenance                                           |   |                                                  | 96,211    |   |              |   | 90,670    |   |   |   | 291,346   |   |   |   | 263,212 |   |
| Depreciation and amortization                                        |   |                                                  | 45,221    |   |              |   | 43,823    |   |   |   | 131,665   |   |   |   | 131,680 |   |
| General taxes                                                        |   |                                                  | 10,095    |   |              |   | 7,127     |   |   |   | 37,284    |   |   |   | 28,851 |   |
| Total operating expenses                                             |   |                                                  | 151,527   |   |              |   | 141,620   |   |   |   | 460,295   |   |   |   | 423,743 |   |
| Gain (loss) on sale of assets                                        |   |                                                  | (69       | )      |              |   | 16,126    |   |   |   | (791      | )      |   |   | 15,081 |   |
| Operating income                                                     |   |                                                  | 242,410   |   |              |   | 160,511   |   |   |   | 622,014   |   |   |   | 426,630 |   |
| Equity earnings from investments                                     |   |                                                  | 32,029    |   |              |   | 29,390    |   |   |   | 93,665    |   |   |   | 71,182 |   |
| Allowance for equity funds used during construction                  |   |                                                  | 759       |   |              |   | 266       |   |   |   | 1,625     |   |   |   | 748 |   |
| Other income                                                         |   |                                                  | 82        |   |              |   | 3,623     |   |   |   | 960       |   |   |   | 2,282 |   |
| Other expense                                                        |   |                                                  | (7,167    | )      |              |   | (600      | )      |   |   | (6,249    | )      |   |   | (1,341 | ) |
| Interest expense                                                     |   |                                                  | (55,735   | )      |              |   | (49,131   | )      |   |   | (170,626  | )      |   |   | (156,613 | ) |
| Income before income taxes                                           |   |                                                  | 212,378   |   |              |   | 144,059   |   |   |   | 541,389   |   |   |   | 342,888 |   |
| Income taxes                                                         |   |                                                  | (2,554    | )      |              |   | (2,362    | )      |   |   | (9,253    | )      |   |   | (12,022 | ) |
| Net income                                                           |   |                                                  | 209,824   |   |              |   | 141,697   |   |   |   | 532,136   |   |   |   | 330,866 |   |
| Less:  Net income attributable to noncontrolling interests |   |                                                  | 138       |   |              |   | 161       |   |   |   | 416       |   |   |   | 446 |   |
| Net income attributable to ONEOK Partners, L.P.                      |   | $                                                     | 209,686   |   |              | $      | 141,536   |   |   | $      | 531,720   |   |   | $ | 330,420 |   |
|                                                                 |   |                                                  |      |   |              |   |      |   |   |   |      |   |   |   |   |   |
| Limited partners' interest in net income:                            |   |                                                  |      |   |              |   |      |   |   |   |      |   |   |   |   |   |
| Net income attributable to ONEOK Partners, L.P.                      |   | $                                                     | 209,686   |   |              | $      | 141,536   |   |   | $      | 531,720   |   |   | $ | 330,420 |   |
| General partner's interest in net income                             |   |                                                  | (37,731   | )      |              |   | (30,498   | )      |   |   | (105,376  | )      |   |   | (86,674 | ) |
| Limited partners' interest in net income                             |   | $                                                     | 171,955   |   |              | $      | 111,038   |   |   | $      | 426,344   |   |   | $ | 243,746 |   |
|                                                                 |   |                                                  |      |   |              |   |      |   |   |   |      |   |   |   |   |   |
| Limited partners' net income per unit, basic and diluted             |   | $                                                     | 0.84      |   |              | $      | 0.54      |   |   | $      | 2.09      |   |   | $ | 1.20 |   |
|                                                                 |   |                                                  |      |   |              |   |      |   |   |   |      |   |   |   |   |   |
| Number of units used in computation (thousands)                      |   |                                                  | 203,816   |   |              |   | 203,816   |   |   |   | 203,816   |   |   |   | 202,374 |   |
|                                                                 |   |                                                  |      |   |              |   |      |   |   |   |      |   |   |   |   |   |

----

| ONEOK Partners, L.P. and Subsidiaries                     |   |                   |      |   |         |   |
|-----------------------------------------------------------|--------|------------------------|-----------|--------|--------------|--------|
| CONSOLIDATED BALANCE SHEETS                               |   |                   |      |   |         |   |
|                                                      |   | September 30,          |      |   | December 31, |   |
| (Unaudited)                                               |   | 2011                   |      |   | 2010         |   |
| Assets                                                    |   | (Thousands of dollars) |      |
| Current assets                                            |   |                   |      |   |         |   |
| Cash and cash equivalents                                 |   | $                      | 127,882   |   |         | $      | 898 |   |
| Accounts receivable, net                                  |   |                   | 897,736   |   |         |   | 815,141 |   |
| Affiliate receivables                                     |   |                   | 5,760     |   |         |   | 5,161 |   |
| Gas and natural gas liquids in storage                    |   |                   | 243,189   |   |         |   | 317,159 |   |
| Commodity imbalances                                      |   |                   | 105,387   |   |         |   | 92,353 |   |
| Other current assets                                      |   |                   | 104,123   |   |         |   | 48,060 |   |
| Total current assets                                      |   |                   | 1,484,077 |   |         |   | 1,278,772 |   |
|                                                      |   |                   |      |   |         |   |   |   |
| Property, plant and equipment                             |   |                   |      |   |         |   |   |   |
| Property, plant and equipment                             |   |                   | 6,554,177 |   |         |   | 5,857,000 |   |
| Accumulated depreciation and amortization                 |   |                   | 1,220,134 |   |         |   | 1,099,548 |   |
| Net property, plant and equipment                         |   |                   | 5,334,043 |   |         |   | 4,757,452 |   |
|                                                      |   |                   |      |   |         |   |   |   |
| Investments and other assets                              |   |                   |      |   |         |   |   |   |
| Investments in unconsolidated affiliates                  |   |                   | 1,224,397 |   |         |   | 1,188,124 |   |
| Goodwill and intangible assets                            |   |                   | 655,454   |   |         |   | 661,204 |   |
| Other assets                                              |   |                   | 77,582    |   |         |   | 34,548 |   |
| Total investments and other assets                        |   |                   | 1,957,433 |   |         |   | 1,883,876 |   |
| Total assets                                              |   | $                      | 8,775,553 |   |         | $      | 7,920,100 |   |
|                                                      |   |                   |      |   |         |   |   |   |
| Liabilities and partners' equity                          |   |                   |      |   |         |   |   |   |
| Current liabilities                                       |   |                   |      |   |         |   |   |   |
| Current maturities of long-term debt                      |   | $                      | 361,931   |   |         | $      | 236,931 |   |
| Notes payable                                             |   |                   | -         |   |         |   | 429,855 |   |
| Accounts payable                                          |   |                   | 971,437   |   |         |   | 852,330 |   |
| Affiliate payables                                        |   |                   | 36,478    |   |         |   | 29,765 |   |
| Commodity imbalances                                      |   |                   | 237,080   |   |         |   | 291,110 |   |
| Other current liabilities                                 |   |                   | 225,987   |   |         |   | 134,151 |   |
| Total current liabilities                                 |   |                   | 1,832,913 |   |         |   | 1,974,142 |   |
|                                                      |   |                   |      |   |         |   |   |   |
| Long-term debt, excluding current maturities              |   |                   | 3,517,543 |   |         |   | 2,581,572 |   |
|                                                      |   |                   |      |   |         |   |   |   |
| Deferred credits and other liabilities                    |   |                   | 95,358    |   |         |   | 87,393 |   |
|                                                      |   |                   |      |   |         |   |   |   |
| Commitments and contingencies                             |   |                   |      |   |         |   |   |   |
|                                                      |   |                   |      |   |         |   |   |   |
| Equity                                                    |   |                   |      |   |         |   |   |   |
| ONEOK Partners, L.P. partners’ equity:              |   |                   |      |   |         |   |   |   |
| General partner                                           |   |                   | 101,188   |   |         |   | 94,691 |   |
| Common units: 130,827,354 units issued and outstanding at |   |                   |      |   |         |   |   |   |
| September 30, 2011, and December 31, 2010                 |   |                   | 1,872,856 |   |         |   | 1,825,521 |   |
| Class B units: 72,988,252 units issued and outstanding at |   |                   |      |   |         |   |   |   |
| September 30, 2011, and December 31, 2010                 |   |                   | 1,377,811 |   |         |   | 1,345,322 |   |
| Accumulated other comprehensive income (loss)             |   |                   | (27,365   | )      |         |   | 6,283 |   |
| Total ONEOK Partners, L.P. partners' equity               |   |                   | 3,324,490 |   |         |   | 3,271,817 |   |
|                                                      |   |                   |      |   |         |   |   |   |
| Noncontrolling interests in consolidated subsidiaries     |   |                   | 5,249     |   |         |   | 5,176 |   |
|                                                      |   |                   |      |   |         |   |   |   |
| Total equity                                              |   |                   | 3,329,739 |   |         |   | 3,276,993 |   |
| Total liabilities and equity                              |   | $                      | 8,775,553 |   |         | $      | 7,920,100 |   |

----

| ONEOK Partners, L.P. and Subsidiaries                                           |                   |              |      |   |   |   |
|---------------------------------------------------------------------------------|------------------------|-------------------|-----------|--------|--------|--------|
| CONSOLIDATED STATEMENTS OF CASH FLOWS                                           |                   |              |      |   |   |   |
|                                                                            |                   | Nine Months Ended |      |
|                                                                            |                   | September 30,     |      |
| (Unaudited)                                                                     |                   | 2011              |      |   | 2010   |   |
|                                                                            | (Thousands of dollars) |              |
| Operating activities                                                            |                   |              |      |   |   |   |
| Net income                                                                      |                   | $                 | 532,136   |   |   | $      | 330,866 |   |
| Depreciation and amortization                                                   |                   |              | 131,665   |   |   |   | 131,680 |   |
| Allowance for equity funds used during construction                             |                   |              | (1,625    | )      |   |   | (748 | ) |
| Loss (gain) on sale of assets                                                   |                   |              | 791       |   |   |   | (15,081 | ) |
| Deferred income taxes                                                           |                   |              | 4,999     |   |   |   | 5,969 |   |
| Equity earnings from investments                                                |                   |              | (93,665   | )      |   |   | (71,182 | ) |
| Distributions received from unconsolidated affiliates                           |                   |              | 87,151    |   |   |   | 69,889 |   |
| Changes in assets and liabilities:                                              |                   |              |      |   |   |   |   |   |
| Accounts receivable                                                             |                   |              | (82,595   | )      |   |   | 48,067 |   |
| Affiliate receivables                                                           |                   |              | (599      | )      |   |   | 4,287 |   |
| Gas and natural gas liquids in storage                                          |                   |              | 73,970    |   |   |   | (46,393 | ) |
| Accounts payable                                                                |                   |              | 91,974    |   |   |   | (78,921 | ) |
| Affiliate payables                                                              |                   |              | 6,713     |   |   |   | (731 | ) |
| Commodity imbalances, net                                                       |                   |              | (67,064   | )      |   |   | (66,921 | ) |
| Other assets and liabilities                                                    |                   |              | (28,549   | )      |   |   | 6,075 |   |
| Cash provided by operating activities                                           |                   |              | 655,302   |   |   |   | 316,856 |   |
|                                                                            |                   |              |      |   |   |   |   |   |
| Investing activities                                                            |                   |              |      |   |   |   |   |   |
| Capital expenditures (less allowance for equity funds used during construction) |                   |              | (662,386  | )      |   |   | (202,773 | ) |
| Contributions to unconsolidated affiliates                                      |                   |              | (51,686   | )      |   |   | (1,313 | ) |
| Distributions received from unconsolidated affiliates                           |                   |              | 16,158    |   |   |   | 9,342 |   |
| Proceeds from sale of assets                                                    |                   |              | 758       |   |   |   | 423,975 |   |
| Cash provided by (used in) investing activities                                 |                   |              | (697,156  | )      |   |   | 229,231 |   |
|                                                                            |                   |              |      |   |   |   |   |   |
| Financing activities                                                            |                   |              |      |   |   |   |   |   |
| Cash distributions:                                                             |                   |              |      |   |   |   |   |   |
| General and limited partners                                                    |                   |              | (451,480  | )      |   |   | (417,446 | ) |
| Noncontrolling interests                                                        |                   |              | (343      | )      |   |   | (760 | ) |
| Borrowing (repayment) of notes payable, net                                     |                   |              | (429,855  | )      |   |   | (196,615 | ) |
| Issuance of long-term debt, net of discounts                                    |                   |              | 1,295,450 |   |   |   | - |   |
| Long-term debt financing costs                                                  |                   |              | (10,986   | )      |   |   | - |   |
| Repayment of long-term debt                                                     |                   |              | (233,948  | )      |   |   | (258,947 | ) |
| Issuance of common units, net of discounts                                      |                   |              | -         |   |   |   | 322,701 |   |
| Contribution from general partner                                               |                   |              | -         |   |   |   | 6,820 |   |
| Cash provided by (used in) financing activities                                 |                   |              | 168,838   |   |   |   | (544,247 | ) |
| Change in cash and cash equivalents                                             |                   |              | 126,984   |   |   |   | 1,840 |   |
| Cash and cash equivalents at beginning of period                                |                   |              | 898       |   |   |   | 3,151 |   |
| Cash and cash equivalents at end of period                                      |                   | $                 | 127,882   |   |   | $      | 4,991 |   |

----

| ONEOK Partners, L.P. and Subsidiaries                                                                                                                                                                                                       |                                   |                    |   |   |   |   |   |   |   |   |   |   |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|----------------------------------------|-------------------------|--------|--------|--------|--------|--------|--------|--------|--------|--------|--------|
| INFORMATION AT A GLANCE                                                                                                                                                                                                                     |                                   |                    |   |   |   |   |   |   |   |   |   |   |
|                                                                                                                                                                                                                                        |                                   |                    |   |   |   |   |   |   |   |   |   |   |
|                                                                                                                                                                                                                                        | Three Months Ended                     |  Nine Months Ended |
|                                                                                                                                                                                                                                        | September 30,                          |  September 30,     |
| (Unaudited)                                                                                                                                                                                                                                 |                                   | 2011                    |   |   | 2010   |   |   | 2011   |   |   | 2010   |   |
|                                                                                                                                                                                                                                        | (Millions of dollars, except as noted) |
| Natural Gas Gathering and Processing                                                                                                                                                                                                        |                                   |                    |   |   |   |   |   |   |   |   |   |   |
| Net margin                                                                                                                                                                                                                                  |                                   | $                       | 104.1  |   |   | $      | 87.8   |   |   | $      | 298.2  |   |   | $ | 257.9 |   |
| Operating costs                                                                                                                                                                                                                             |                                   | $                       | 35.0   |   |   | $      | 34.1   |   |   | $      | 109.6  |   |   | $ | 98.5 |   |
| Depreciation and amortization                                                                                                                                                                                                               |                                   | $                       | 17.3   |   |   | $      | 15.3   |   |   | $      | 50.1   |   |   | $ | 44.9 |   |
| Operating income                                                                                                                                                                                                                            |                                   | $                       | 51.8   |   |   | $      | 38.2   |   |   | $      | 138.3  |   |   | $ | 114.1 |   |
| Equity earnings from investments                                                                                                                                                                                                            |                                   | $                       | 8.0    |   |   | $      | 7.4    |   |   | $      | 21.9   |   |   | $ | 20.7 |   |
| Natural gas gathered (BBtu/d) (a)                                                                                                                                                                                                           |                                   |                    | 1,044  |   |   |   | 1,046  |   |   |   | 1,021  |   |   |   | 1,075 |   |
| Natural gas processed (BBtu/d) (a)                                                                                                                                                                                                          |                                   |                    | 723    |   |   |   | 669    |   |   |   | 682    |   |   |   | 674 |   |
| NGL sales (MBbl/d)(a)                                                                                                                                                                                                                       |                                   |                    | 50     |   |   |   | 44     |   |   |   | 47     |   |   |   | 44 |   |
| Residue gas sales (BBtu/d)(a)                                                                                                                                                                                                               |                                   |                    | 348    |   |   |   | 292    |   |   |   | 308    |   |   |   | 286 |   |
| Realized composite NGL net sales price ($/gallon) (a) (b)                                                                                                                                                                                   |                                   | $                       | 1.09   |   |   | $      | 0.87   |   |   | $      | 1.09   |   |   | $ | 0.92 |   |
| Realized condensate net sales price ($/Bbl) (a) (b)                                                                                                                                                                                         |                                   | $                       | 87.89  |   |   | $      | 65.14  |   |   | $      | 81.63  |   |   | $ | 63.61 |   |
| Realized residue gas net sales price ($/MMBtu) (a) (b)                                                                                                                                                                                      |                                   | $                       | 5.25   |   |   | $      | 5.60   |   |   | $      | 5.63   |   |   | $ | 5.43 |   |
| Realized gross processing spread ($/MMBtu) (a) (b)                                                                                                                                                                                          |                                   | $                       | 8.17   |   |   | $      | 5.67   |   |   | $      | 8.30   |   |   | $ | 5.97 |   |
| Capital expenditures - growth                                                                                                                                                                                                               |                                   | $                       | 157.9  |   |   | $      | 64.6   |   |   | $      | 386.9  |   |   | $ | 105.4 |   |
| Capital expenditures - maintenance                                                                                                                                                                                                          |                                   | $                       | 7.1    |   |   | $      | 4.7    |   |   | $      | 17.2   |   |   | $ | 12.9 |   |
| (a) - Includes volumes for consolidated entities only.                                                                                                                                                                                      |                                   |                    |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| (b) - Presented net of the impact of hedging activities and includes equity volumes only.                                                                                                                                                   |                                   |                    |   |   |   |   |   |   |   |
|                                                                                                                                                                                                                                        |                                   |                    |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Natural Gas Pipelines                                                                                                                                                                                                                       |                                   |                    |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Net margin                                                                                                                                                                                                                                  |                                   | $                       | 69.8   |   |   | $      | 75.0   |   |   | $      | 213.9  |   |   | $ | 226.4 |   |
| Operating costs                                                                                                                                                                                                                             |                                   | $                       | 24.4   |   |   | $      | 24.8   |   |   | $      | 79.1   |   |   | $ | 71.3 |   |
| Depreciation and amortization                                                                                                                                                                                                               |                                   | $                       | 11.4   |   |   | $      | 11.2   |   |   | $      | 33.9   |   |   | $ | 33.1 |   |
| Operating income                                                                                                                                                                                                                            |                                   | $                       | 34.0   |   |   | $      | 39.0   |   |   | $      | 100.6  |   |   | $ | 122.1 |   |
| Equity earnings from investments                                                                                                                                                                                                            |                                   | $                       | 19.8   |   |   | $      | 21.3   |   |   | $      | 57.4   |   |   | $ | 48.9 |   |
| Natural gas transportation capacity contracted (MDth/d) (a)                                                                                                                                                                                 |                                   |                    | 5,132  |   |   |   | 5,460  |   |   |   | 5,353  |   |   |   | 5,627 |   |
| Transportation capacity subscribed (a)                                                                                                                                                                                                      |                                   |                    | 79%    |   |   |   | 84%    |   |   |   | 83%    |   |   |   | 87% |   |
| Average natural gas price   Mid-Continent region ($/MMBtu) (a)                                                                                                                                                               |                                   | $                       | 4.02   |   |   | $      | 3.94   |   |   | $      | 4.10   |   |   | $ | 4.35 |   |
| Capital expenditures - growth                                                                                                                                                                                                               |                                   | $                       | 1.9    |   |   | $      | 1.6    |   |   | $      | 7.6    |   |   | $ | 4.7 |   |
| Capital expenditures - maintenance                                                                                                                                                                                                          |                                   | $                       | 8.7    |   |   | $      | 5.2    |   |   | $      | 17.6   |   |   | $ | 13.7 |   |
| (a) - Includes volumes for consolidated entities only.                                                                                                                                                                                      |                                   |                    |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
|                                                                                                                                                                                                                                        |                                   |                    |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
|                                                                                                                                                                                                                                        |                                   |                    |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Natural Gas Liquids                                                                                                                                                                                                                         |                                   |                    |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Net margin                                                                                                                                                                                                                                  |                                   | $                       | 221.3  |   |   | $      | 123.8  |   |   | $      | 572.5  |   |   | $ | 356.3 |   |
| Operating costs                                                                                                                                                                                                                             |                                   | $                       | 47.6   |   |   | $      | 39.5   |   |   | $      | 141.1  |   |   | $ | 126.2 |   |
| Depreciation and amortization                                                                                                                                                                                                               |                                   | $                       | 16.6   |   |   | $      | 17.4   |   |   | $      | 47.6   |   |   | $ | 53.7 |   |
| Operating income                                                                                                                                                                                                                            |                                   | $                       | 157.1  |   |   | $      | 83.2   |   |   | $      | 383.5  |   |   | $ | 191.9 |   |
| Equity earnings from investments                                                                                                                                                                                                            |                                   | $                       | 4.3    |   |   | $      | 0.7    |   |   | $      | 14.3   |   |   | $ | 1.7 |   |
| NGL sales (MBbl/d)                                                                                                                                                                                                                          |                                   |                    | 485    |   |   |   | 449    |   |   |   | 481    |   |   |   | 443 |   |
| NGLs fractionated (MBbl/d) (a)                                                                                                                                                                                                              |                                   |                    | 529    |   |   |   | 500    |   |   |   | 522    |   |   |   | 505 |   |
| NGLs transported-gathering lines (MBbl/d) (b) (c)                                                                                                                                                                                           |                                   |                    | 443    |   |   |   | 436    |   |   |   | 424    |   |   |   | 452 |   |
| NGLs transported-distribution lines (MBbl/d) (b)                                                                                                                                                                                            |                                   |                    | 457    |   |   |   | 455    |   |   |   | 460    |   |   |   | 468 |   |
| Conway-to-Mont Belvieu OPIS average price differential                                                                                                                                                                                      |                                   |                    |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
|   Ethane ($/gallon)                                                                                                                                                                                                               |                                   | $                       | 0.27   |   |   | $      | 0.10   |   |   | $      | 0.21   |   |   | $ | 0.11 |   |
| Capital expenditures - growth                                                                                                                                                                                                               |                                   | $                       | 70.1   |   |   | $      | 22.2   |   |   | $      | 215.4  |   |   | $ | 50.6 |   |
| Capital expenditures - maintenance                                                                                                                                                                                                          |                                   | $                       | 6.4    |   |   | $      | 5.5    |   |   | $      | 17.3   |   |   | $ | 14.7 |   |
| (a) - Includes volumes fractionated at company-owned and third-party facilities.                                                                                                                                                            |                                   |                    |   |   |   |   |   |   |   |
| (b) - Includes volumes for consolidated entities only.                                                                                                                                                                                      |                                   |                    |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| (c) - 2010 volume information includes 52 MBbl/d and 84 MBbl/d for the three and nine months ended September 30, 2010, respectively, related to Overland Pass Pipeline Company which is accounted for under the equity method in 2011. |                                   |

----

| ONEOK Partners, L.P. and Subsidiaries                              |                                            |    |   |              |   |    |   |   |   |     |   |
|--------------------------------------------------------------------|-------------------------------------------------|---------|--------|-------------------|--------|---------|--------|--------|--------|----------|--------|
| RECONCILIATION OF NON-GAAP FINANCIAL MEASURES                      |                                            |    |   |              |   |    |   |   |   |     |
|                                                               |                                            |    |   |              |   |    |   |   |   |     |   |
|                                                               | Three Months Ended                              |    |   | Nine Months Ended |   |
|                                                               | September 30,                                   |    |   | September 30,     |   |
| (Unaudited)                                                        | 2011                                            |    |   | 2010              |   |    | 2011   |   |   | 2010     |   |
|                                                               | (Thousands of dollars, except per unit amounts) |    |
|                                                               |                                            |    |   |              |   |    |   |   |   |     |   |
| Reconciliation of Net Income to EBITDA and Distributable Cash Flow |                                            |    |   |              |   |    |   |   |   |     |
| Net income                                                         | $                                               | 209,824 |   |              | $      | 141,697 |   |   | $      | 532,136  |   |   | $ | 330,866 |   |
| Interest expense                                                   |                                            | 55,735  |   |              |   | 49,131  |   |   |   | 170,626  |   |   |   | 156,613 |   |
| Depreciation and amortization                                      |                                            | 45,221  |   |              |   | 43,823  |   |   |   | 131,665  |   |   |   | 131,680 |   |
| Income taxes                                                       |                                            | 2,554   |   |              |   | 2,362   |   |   |   | 9,253    |   |   |   | 12,022 |   |
| Allowance for equity funds used during construction                |                                            | (759    | )      |              |   | (266    | )      |   |   | (1,625   | )      |   |   | (748 | ) |
| EBITDA                                                             |                                            | 312,575 |   |              |   | 236,747 |   |   |   | 842,055  |   |   |   | 630,433 |   |
| Interest expense                                                   |                                            | (55,735 | )      |              |   | (49,131 | )      |   |   | (170,626 | )      |   |   | (156,613 | ) |
| Maintenance capital                                                |                                            | (22,356 | )      |              |   | (15,678 | )      |   |   | (52,543  | )      |   |   | (42,160 | ) |
| Equity earnings from investments                                   |                                            | (32,029 | )      |              |   | (29,390 | )      |   |   | (93,665  | )      |   |   | (71,182 | ) |
| Distributions received from unconsolidated affiliates              |                                            | 32,257  |   |              |   | 29,587  |   |   |   | 103,309  |   |   |   | 79,231 |   |
| Other                                                              |                                            | (1,359  | )      |              |   | (16,155 | )      |   |   | (3,806   | )      |   |   | (21,894 | ) |
| Distributable cash flow                                            | $                                               | 233,353 |   |              | $      | 155,980 |   |   | $      | 624,724  |   |   | $ | 417,815 |   |
|                                                               |                                            |    |   |              |   |    |   |   |   |     |   |   |   |   |   |
|                                                               |                                            |    |   |              |   |    |   |   |   |     |   |   |   |   |   |
| Distributions to general partner                                   |                                            | (36,696 | )      |              |   | (30,582 | )      |   |   | (103,974 | )      |   |   | (88,688 | ) |
| Distributable cash flow to limited partners                        | $                                               | 196,657 |   |              | $      | 125,398 |   |   | $      | 520,750  |   |   | $ | 329,127 |   |
|                                                               |                                            |    |   |              |   |    |   |   |   |     |   |   |   |   |   |
| Distributions declared per limited partner unit                    | $                                               | 0.595   |   |              | $      | 0.565   |   |   | $      | 1.755    |   |   | $ | 1.680 |   |
| Coverage ratio                                                     |                                            | 1.62    |   |              |   | 1.09    |   |   |   | 1.46     |   |   |   | 0.97 |   |
|                                                               |                                            |    |   |              |   |    |   |   |   |     |   |   |   |   |   |
|                                                               |                                            |    |   |              |   |    |   |   |   |     |   |   |   |   |   |
| Number of units used in computation (thousands)                    |                                            | 203,816 |   |              |   | 203,816 |   |   |   | 203,816  |   |   |   | 202,374 |   |
|                                                               |                                            |    |   |              |   |    |   |   |   |     |   |   |   |   |   |

----

| ONEOK Partners, L.P. and Subsidiaries            |   |     |      |   |     |   |   |   |   |
|--------------------------------------------------|--------|----------|-----------|--------|----------|--------|--------|--------|--------|
| EARNINGS GUIDANCE*                               |   |     |      |   |     |   |   |   |   |
|                                             |   |     |      |   |     |   |   |   |   |
|                                             |   | Updated  |      |   | Previous |   |   |   |   |
|                                             |   | 2011     |      |   | 2011     |   |   |   |   |
|                                             |   | Guidance |      |   | Guidance |   |   | Change |   |
| (Millions of dollars)                            |   |     |      |   |     |   |   |   |   |
|                                             |   |     |      |   |     |   |   |   |   |
| Operating income                                 |   |     |      |   |     |   |   |   |   |   |   |   |
| Natural Gas Gathering and Processing             |   | $        | 177       |   |     | $      | 180    |   |   | $ | (3 | ) |
| Natural Gas Pipelines                            |   |     | 133       |   |     |   | 141    |   |   |   | (8 | ) |
| Natural Gas Liquids                              |   |     | 560       |   |     |   | 431    |   |   |   | 129 |   |
| Other                                            |   |     | -         |   |     |   | -      |   |   |   | - |   |
| Operating income                                 |   |     | 870       |   |     |   | 752    |   |   |   | 118 |   |
| Equity earnings from investments                 |   |     | 126       |   |     |   | 123    |   |   |   | 3 |   |
| Other income (expense)                           |   |     |   (6 | )      |     |   | 4      |   |   |   | (10 | ) |
| Interest expense                                 |   |     | (221      | )      |     |   | (220   | )      |   |   | (1 | ) |
| Income before income taxes                       |   |     | 769       |   |     |   | 659    |   |   |   | 110 |   |
| Income taxes                                     |   |     | (14       | )      |     |   | (14    | )      |   |   | - |   |
| Net income attributable to ONEOK Partners, L.P.  |   | $        | 755       |   |     | $      | 645    |   |   | $ | 110 |   |
|                                             |   |     |      |   |     |   |   |   |   |   |   |   |
|                                             |   |     |      |   |     |   |   |   |   |   |   |   |
| Capital expenditures                             |   |     |      |   |     |   |   |   |   |   |   |   |
| Natural Gas Gathering and Processing             |   | $        | 621       |   |     | $      | 637    |   |   | $ | (16 | ) |
| Natural Gas Pipelines                            |   |     | 36        |   |     |   | 36     |   |   |   | - |   |
| Natural Gas Liquids                              |   |     | 528       |   |     |   | 618    |   |   |   | (90 | ) |
| Other                                            |   |     | 1         |   |     |   | 1      |   |   |   | - |   |
| Total capital expenditures                       |   | $        | 1,186     |   |     | $      | 1,292  |   |   | $ | (106 | ) |
|                                             |   |     |      |   |     |   |   |   |   |   |   |   |
| Growth                                           |   | $        | 1,089     |   |     | $      | 1,190  |   |   | $ | (101 | ) |
| Maintenance                                      |   |     | 97        |   |     |   | 102    |   |   |   | (5 | ) |
| Total capital expenditures                       |   | $        | 1,186     |   |     | $      | 1,292  |   |   | $ | (106 | ) |
| *Amounts shown are midpoints of ranges provided. |   |     |      |   |     |   |   |   |   |

----

| ONEOK Partners, L.P. and Subsidiaries                              |     |   |   |     |   |   |   |
|--------------------------------------------------------------------|----------|--------|--------|----------|--------|--------|--------|
| EARNINGS GUIDANCE*                                                 |     |   |   |     |   |   |   |   |
|                                                               |     |   |   |     |   |   |   |   |
|                                                               | Updated  |   |   | Previous |   |   |   |   |
|                                                               | 2011     |   |   | 2011     |   |   |   |   |
|                                                               | Guidance |   |   | Guidance |   |   | Change |   |
| (Millions of dollars)                                              |     |   |   |     |   |   |   |   |
|                                                               |     |   |   |     |   |   |   |   |
| Reconciliation of Net Income to EBITDA and Distributable Cash Flow |
| Net income                                                         | $        | 755    |   |     | $      | 645    |   |   | $ | 110 |   |
| Interest expense                                                   |     | 221    |   |     |   | 220    |   |   |   | 1 |   |
| Depreciation and amortization                                      |     | 178    |   |     |   | 179    |   |   |   | (1 | ) |
| Income taxes                                                       |     | 14     |   |     |   | 14     |   |   |   | - |   |
| Allowance for equity funds used during construction, other         |     | (2     | )      |     |   | (3     | )      |   |   | 1 |   |
| EBITDA                                                             | $        | 1,166  |   |     | $      | 1,055  |   |   | $ | 111 |   |
| Interest expense                                                   |     | (221   | )      |     |   | (220   | )      |   |   | (1 | ) |
| Maintenance capital                                                |     | (97    | )      |     |   | (102   | )      |   |   | 5 |   |
| Equity earnings from investments                                   |     | (126   | )      |     |   | (123   | )      |   |   | (3 | ) |
| Distributions received from investments                            |     | 150    |   |     |   | 147    |   |   |   | 3 |   |
| Current income tax expense and other                               |     | (8     | )      |     |   | (8     | )      |   |   | - |   |
| (Gain)/Loss on sale of assets                                      |     | 1      |   |     |   | 1      |   |   |   | - |   |
| Distributable cash flow                                            | $        | 865    |   |     | $      | 750    |   |   | $ | 115 |   |
|                                                               |     |   |   |     |   |   |   |   |   |   |   |
| *Amounts shown are midpoints of ranges provided.                   |     |   |   |     |   |