Item 4. MINE SAFETY DISCLOSURES

Not applicable.

PART II

Our common stock is listed on the NYSE under the trading symbol “OKE.” The corporate name ONEOK is used in newspaper stock listings.

At February 19, 2019, there were 14,223 holders of record of our 411,611,382 outstanding shares of common stock.

For information regarding our Employee Stock Award Program and other equity compensation plans see Note J of the Notes to Consolidated Financial Statements and “Equity Compensation Plan Information” included in Part III, Item 12 in this Annual Report.

PERFORMANCE GRAPH

The following performance graph compares the performance of our common stock with the S&P 500 Index, the Alerian Midstream Energy Select Index, and a ONEOK Peer Group during the period beginning on December 31, 2013, and ending on December 31, 2018.

The graph assumes a $100 investment in our common stock and in each of the indices at the beginning of the period and a reinvestment of dividends paid on such investments throughout the period.

Value of $100 Investment, Assuming Reinvestment of Distributions/Dividends,

at December 31, 2013, and at the End of Every Year Through December 31, 2018.

(a) - The ONEOK Peer Group is comprised of the following companies: Buckeye Partners, L.P.; DCP Midstream, LP; Enbridge Inc.; Energy Transfer LP.; EnLink Midstream Partners, LP; Enterprise Products Partners L.P.; Kinder Morgan, Inc.; Magellan Midstream Partners, L.P.; MPLX LP; NuStar Energy L.P.; Plains All American Pipeline, L.P.; Targa Resources Corp.; and The Williams Companies, Inc.

(b) - The Alerian Midstream Energy Select Index measures the composite performance of approximately 40 North American energy infrastructure companies who are engaged in midstream activities involving energy commodities.