Exhibit 10.1

EXTENSION AGREEMENT
(Extension of Maturity Date Pursuant to Section 2.15 of the Credit Agreement)
This EXTENSION AGREEMENT (this “Agreement”) dated as of January 29, 2016 (the
“Extension Effective Date”) is entered into by and among ONEOK, INC., an
Oklahoma corporation (“Borrower”), the undersigned Lenders (as defined in the
Credit Agreement) (the “Consenting Lenders”), and BANK OF AMERICA, N.A., as
Administrative Agent (in such capacity, the “Administrative Agent”), Swing Line
Lender and L/C Issuer. Capitalized terms used herein and not otherwise defined
herein shall have the meanings attributed to them in the Credit Agreement (as
hereinafter defined).

R E C I T A L S

A.Reference is made to the Amended and Restated Credit Agreement effective as of
January 31, 2014 among the Borrower, the Administrative Agent and the Lenders
(as amended, restated, supplemented or otherwise modified from time to time, the
“Credit Agreement”).

B.This Agreement is being executed to evidence Borrower’s requested extension of
the Maturity Date from January 31, 2019 to January 31, 2020 pursuant to Section
2.15 of the Credit Agreement (the “Extension”).

C.Each of the Consenting Lenders is entering into this Agreement in order to
evidence its consent to the Extension.

NOW, THEREFORE, the parties hereto agree as follows:

1.Consent to Extension. Subject to the satisfaction of the conditions precedent
set forth in Paragraph 2 below, each Consenting Lender hereby consents to the
Extension, and effective as of the Extension Effective Date, the Maturity Date
applicable to each Consenting Lender is January 31, 2020.

2.Conditions Precedent to Effectiveness. This Agreement and the Extension shall
be effective as of the date hereof, provided that the Administrative Agent shall
have received the following (a) counterparts of this Agreement, executed by the
Borrower and Lenders holding more than 50% of the Aggregate Commitments
(calculated in accordance with Section 2.15 of the Credit Agreement), (b) a
certificate of the Borrower dated as of the date hereof containing the
certifications required by Section 2.15(f)(i) of the Credit Agreement, and (c) a
fee in the amount separately agreed by the Borrower, for the account of each
Consenting Lender.

3.Affirmation and Ratification of Loan Documents. The Borrower hereby (a)
ratifies and affirms each Loan Document (as modified by the Extension), (b)
agrees that all of its obligations and covenants under each Loan Document shall
remain unimpaired by the execution and delivery of this Agreement and the other
documents and instruments executed in connection herewith, and (c) agrees that
each Loan Document (as modified by the Extension) shall remain in full force and
effect. This Agreement is a Loan Document.

4.Miscellaneous. (a) Headings and captions may not be construed in interpreting
provisions; (b) this Agreement shall be governed by, and construed in accordance
with, the law of the State of New York; and (c) this Agreement may be executed
in any number of counterparts, and by the different parties hereto on separate
counterparts, with the same effect as if all signatories had signed the same
document, and all of those counterparts must be construed together to constitute
the same document.

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Delivery of an executed signature page by facsimile or other electronic
transmission shall be effective as delivery of a manual executed counterpart.

5.ENTIRE AGREEMENT. THE CREDIT AGREEMENT AND THE OTHER LOAN DOCUMENTS, TOGETHER
WITH THIS AGREEMENT, REPRESENT THE FINAL AGREEMENT BETWEEN THE PARTIES AND MAY
NOT BE CONTRADICTED BY EVIDENCE OF PRIOR, CONTEMPORANEOUS, OR SUBSEQUENT ORAL
AGREEMENTS OF THE PARTIES. THERE ARE NO UNWRITTEN ORAL AGREEMENTS BETWEEN THE
PARTIES.

[Signature Pages to Follow]

2

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IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be duly
executed as of the date first above written.

ONEOK, INC.

By:
/s/ Derek S. Reiners
 
Derek S. Reiners
Senior Vice President, Chief Financial Officer and
Treasurer

Signature Page
to ONEOK, Inc. Extension Agreement

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BANK OF AMERICA, N.A.,
as Administrative Agent

 
 
By:
/s/ Maria A. McClain
 
Name:
Title:
Maria A. McClain
Vice President

Signature Page
to ONEOK, Inc. Extension Agreement

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BANK OF AMERICA, N.A.,
as a Lender, L/C Issuer and Swing Line Lender

 
 
By:
/s/ Adam H. Fey
 
Name:
Title:
Adam H. Fey
Director

Signature Page
to ONEOK, Inc. Extension Agreement

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BARCLAYS BANK PLC,
as a Lender and L/C Issuer

 
 
By:
/s/ Marguerite Sutton
 
Name:
Title:
Marguerite Sutton
Vice President

Signature Page
to ONEOK, Inc. Extension Agreement

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CITIBANK, N.A.,
as a Lender and L/C Issuer

 
 
By:
/s/ Maureen Maroney
 
Name:
Title:
Maureen Maroney
Vice President

Signature Page
to ONEOK, Inc. Extension Agreement

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JPMORGAN CHASE BANK, N.A.,
as a Lender and L/C Issuer

 
 
By:
/s/ Darren Vanek
 
Name:
Title:
Darren Vanek
Executive Director

Signature Page
to ONEOK, Inc. Extension Agreement

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MIZUHO BANK, LTD.,
as a Lender and L/C Issuer

 
 
By:
/s/ Leon Mo
 
Name:
Title:
Leon Mo
Authorized Signatory

Signature Page
to ONEOK, Inc. Extension Agreement

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MORGAN STANLEY BANK, N.A.,
as a Lender and L/C Issuer

 
 
By:
/s/ Melissa James
 
Name:
Title:
Melissa James
Authorized Signatory

Signature Page
to ONEOK, Inc. Extension Agreement

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UBS AG STAMFORD BRANCH,
as a Lender and L/C Issuer

 
 
By:
/s/ Houssem Daly
 
Name:
Title:
Houssem Daly
Associate Director
 
 
 
By:
/s/ Kenneth Chin
 
Name:
Title:
Kenneth Chin
Director

Signature Page
to ONEOK, Inc. Extension Agreement

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WELLS FARGO BANK, NATIONAL
ASSOCIATION,
as a Lender and L/C Issuer

 
 
By:
/s/ Nathan Starr
 
Name:
Title:
Nathan Starr
Portfolio Manager

Signature Page
to ONEOK, Inc. Extension Agreement

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THE BANK OF TOKYO-MITSUBISHI UFJ, LTD.,
NEW YORK BRANCH,
as a Lender

 
 
By:
/s/ Stephan W. Warfel
 
Name:
Title:
Stephen W. Warfel
Managing Director

Signature Page
to ONEOK, Inc. Extension Agreement

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BRANCH BANKING AND TRUST COMPANY,
as a Lender

 
 
By:
/s/ Lincoln LaCour
 
Name:
Title:
Lincoln LaCour
AVP – Corporate Banking Associate

Signature Page
to ONEOK, Inc. Extension Agreement

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DEUTSCHE BANK AG NEW YORK BRANCH,
as a Lender

 
 
By:
/s/ Ming K. Chu
 
Name:
Title:
Ming K. Chu
Vice President
 
 
 
By:
/s/ Yvonne Tilden
 
Name:
Title:
Yvonne Tilden
Director

Signature Page
to ONEOK, Inc. Extension Agreement

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GOLDMAN SACHS BANK USA,
as a Lender

 
 
By:
/s/ Ryan Durkin
 
Name:
Title:
Ryan Durkin
Authorized Signatory

Signature Page
to ONEOK, Inc. Extension Agreement

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PNC BANK, NATIONAL ASSOCIATION,
as a Lender

 
 
By:
/s/ Tom Byargeon
 
Name:
Title:
Tom Byargeon
Managing Director

Signature Page
to ONEOK, Inc. Extension Agreement

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ROYAL BANK OF CANADA,
as a Lender

 
 
By:
/s/ Jim Allred
 
Name:
Title:
Jim Allred
Authorized Signatory

Signature Page
to ONEOK, Inc. Extension Agreement

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SUMITOMO MITSUI BANKING CORPORATION,
NEW YORK BRANCH,
as a Lender

 
 
By:
/s/ David Kee
 
Name:
Title:
David Kee
Managing Director

Signature Page
to ONEOK, Inc. Extension Agreement

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U.S. BANK NATIONAL ASSOCIATION,
as a Lender

 
 
By:
/s/ John Prigge
 
Name:
Title:
John Prigge
Vice President

Signature Page
to ONEOK, Inc. Extension Agreement

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BOKF, NA dba BANK OF OKLAHOMA,
as a Lender

 
 
By:
/s/ Linda J. Bridges
 
Name:
Title:
Linda J. Bridges
Vice President

Signature Page
to ONEOK, Inc. Extension Agreement

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ARVEST BANK,
as a Lender

 
 
By:
/s/ Rick Gaut
 
Name:
Title:
Rick Gaut
SVP, Commercial Loan Manager

Signature Page
to ONEOK, Inc. Extension Agreement