Type	Name	Date
Credit agreement	First Amendment to Amended and Restated Credit Agreement by and among ONEOK, Inc., ONEOK Partners Intermediate Limited Partnership and ONEOK Partners, L.P., the lenders party thereto and Citibank, N.A., as administrative agent, swing line lender and L/C Issuer	05/26/2023
Credit agreement	Amended and Restated Credit Agreement, by and among ONEOK, Inc., as borrower, Citibank, N.A., as administrative agent, a swing line lender, a letter of credit issuer and a lender, and the other lenders, swing line lenders and letter of credit issuers parties thereto	06/13/2022
Underwriting agreement	Underwriting Agreement, among ONEOK, Inc., and Barclays Capital Inc., J.P. Morgan Securities LLC and Citigroup Global Markets Inc., as representatives of the several underwriters named therein	06/16/2020
Credit agreement	Credit Agreement, among ONEOK, Inc., Citibank, N.A., as administrative agent, a swingline lender, a letter of credit issuer and a lender, and the other lenders, swingline lenders and letter of credit issuers parties thereto	04/19/2017
Indenture	Second Supplemental Indenture, between ONEOK, Inc. and U.S. Bank National Association, as trustee, with respect to the 7.50% Notes due 2023 (the “Notes”)	08/21/2015
Credit agreement	Credit Agreement, among ONE Gas, Inc., Bank of America, N.A., as administrative agent, swingline lender and a letter of credit issuer, and the other lenders and letter of credit issuers parties thereto	12/23/2013
Credit agreement	First Amendment to Credit Agreement, among ONEOK, Inc., as borrower, the lenders party thereto, Bank of America, N.A., as administrative agent, swing line lender, and a letter of credit issuer, and JPMorgan Chase Bank, N.A. and The Royal Bank of Scotland plc, as letter of credit issuers	04/02/2013
Indenture	Indenture, among ONEOK, Inc. and U.S. Bank National Association, as trustee	01/26/2012
Indenture	First Supplemental Indenture, among ONEOK, Inc. and U.S. Bank National Association, as trustee, with respect to the 4.25% Notes due 2022 (the “Notes”)	01/26/2012
Credit agreement	Credit Agreement, among ONEOK, Inc., as borrower, the lenders party thereto, Bank of America, N.A., as administrative agent, swing line lender, and a letter of credit issuer, and JPMorgan Chase Bank, N.A. and The Royal Bank of Scotland plc, as letter of credit issuers	04/07/2011