EX-4.6

Exhibit 4.6

[FORM OF FACE OF NOTE]

[If a Global Security, insert - UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY, A NEW YORK CORPORATION (“DTC”), NEW YORK, NEW YORK, TO THE COMPANY OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT, AND ANY CERTIFICATE ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR SUCH OTHER NAME AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC (AND ANY PAYMENT IS MADE TO CEDE & CO., OR TO SUCH OTHER ENTITY AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC), ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL INASMUCH AS THE REGISTERED OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.]

[If a Global Security, insert - TRANSFERS OF THIS GLOBAL SECURITY SHALL BE LIMITED TO TRANSFERS IN WHOLE, BUT NOT IN PART, TO NOMINEES OF DTC OR TO A SUCCESSOR THEREOF OR SUCH SUCCESSOR’S NOMINEE, AND TRANSFERS OF PORTIONS OF THIS GLOBAL SECURITY SHALL BE LIMITED TO TRANSFERS MADE IN ACCORDANCE WITH THE RESTRICTIONS SET FORTH IN THE INDENTURE REFERRED TO HEREIN.]

ONEOK, INC.

5.400% Note due 2035


No._____		U.S. $_______

CUSIP No. 682680 DC4

ONEOK, Inc., an Oklahoma corporation (herein called the “Company”, which term includes any successor Person under the Indenture hereinafter referred to), for value received, hereby promises to pay to _____________________, or registered assigns, the principal sum of ___________ United States Dollars ($ ) on October 15, 2035, the stated maturity date, and to pay interest thereon from August 12, 2025, or from the most recent interest payment date to which interest has been paid or duly provided for, semi-annually on April 15 and October 15 in each year, commencing on April 15, 2026, at the rate of 5.400% per annum, until the principal hereof is paid or made available for payment and at the same rate per annum on any overdue principal and premium and on any overdue installment of interest. The amount of interest payable for any period shall be computed on the basis of twelve 30-day months and a 360-day year. The amount of interest payable for any partial period shall be computed on the basis of a 360-day year of twelve 30-day months and the days elapsed in any partial month. In the event that any date on which interest is payable on this Note is not a Business Day, then a payment of the interest payable on such date will be made on the next succeeding day which is a Business Day (and without any interest or other payment in respect of any such delay) with the same force and effect as if made on the date the payment was originally payable. The interest so payable, and punctually paid or duly provided for, on any interest payment date will, as provided in the Indenture, be paid to the Person in whose

name this Note (or one or more predecessor Notes) is registered at the close of business on the regular record date for such interest, which record date shall be April 1 or October 1 (whether or not a Business Day), as the case may be, next preceding such interest payment date. Any such interest not so punctually paid or duly provided for shall forthwith cease to be payable to the Holder on such regular record date and may either be paid to the Person in whose name this Note (or one or more predecessor Notes) is registered at the close of business on a special record date for the payment of such Defaulted Interest to be fixed by the Trustee, notice of which shall be given to Holders of Notes not less than 10 days prior to such special record date, or be paid at any time in any other lawful manner not inconsistent with the requirements of any securities exchange or automated quotation system on which the Notes may be listed or traded, and upon such notice as may be required by such exchange or automated quotation system, all as more fully provided in the Indenture.

[If a Global Security, insert - Payment of the principal of (and premium, if any) and any such interest on this Note will be made by wire transfer of immediately available funds to the accounts specified by DTC in accordance with DTC procedures.]

[If a definitive Security, insert - Payment of the principal of (and premium, if any) and any such interest on this Note will be made at the office or agency of the Company maintained for that purpose in U.S. Dollars or subject to any laws or regulations applicable thereto and to the right of the Company (as provided in the Indenture) to rescind the designation of any such Paying Agent, at the offices of _____________, and at such other offices or agencies as the Company may designate, by U.S. Dollar check drawn on, or transfer to a U.S. Dollar account maintained by the payee with, a bank in The City of New York (so long as the applicable Paying Agent has received proper transfer instructions in writing at least 10 days prior to the payment date); provided, however, that payment of interest may be made at the option of the Company by U.S. Dollar check mailed to the addresses of the Persons entitled thereto as such addresses shall appear in the Security Register or by transfer to a U.S. Dollar account maintained by the payee with a bank in The City of New York (so long as the applicable Paying Agent has received proper transfer instructions in writing by the record date prior to the applicable interest payment date).]

Reference is hereby made to the further provisions of this Note set forth on the reverse hereof, which further provisions shall for all purposes have the same effect as if set forth at this place.

Unless the certificate of authentication hereon has been executed by the Trustee referred to on the reverse hereof by manual signature, this Note shall not be entitled to any benefit under the Indenture or be valid or obligatory for any purpose.

IN WITNESS WHEREOF, the Company has caused this instrument to be duly executed.

Dated: ,


ONEOK, INC.

By:
Name:
Title:


ATTEST

By:
Name:
Title:

[Signature Page to 2035 Global Note A-[ • ]]

TRUSTEE’S CERTIFICATE OF AUTHENTICATION

This is one of the Securities of the series designated therein referred to in the within mentioned Indenture.

Dated: ,

U.S. BANK TRUST COMPANY, NATIONAL ASSOCIATION,


as Trustee

By:
		Authorized Signatory

[Signature Page to 2035 Global Note A-[ • ]]

[REVERSE OF NOTE]

ONEOK, INC.

5.400% Note due 2035

This security is one of a duly authorized issue of debt securities of the Company (the “Securities”), issued and to be issued in one or more series under an Indenture, dated as of January 26, 2012, between the Company and U.S. Bank Trust Company, National Association (as successor in interest to U.S. Bank National Association), as trustee (the “Trustee”, which term includes any successor trustee under the Indenture), as amended and supplemented to date, including without limitation by the Thirty-Fourth Supplemental Indenture thereto, dated August 12, 2025 among the Company, ONEOK Partners, L.P. (“ONEOK Partners”), ONEOK Partners Intermediate Limited Partnership (“ONEOK Partners Intermediate”), Magellan Midstream Partners, L.P. (“Magellan”), Elk Merger Sub II, L.L.C. (“Elk Merger Sub II”) and EnLink Midstream Partners, LP (together with ONEOK Partners, ONEOK Partners Intermediate, Magellan and Elk Merger Sub II, each a “Guarantor” and collectively, the “Guarantors”) and the Trustee (such Indenture, as so amended and supplemented being referred to herein as the “Indenture”), to which Indenture and all indentures supplemental thereto reference is hereby made for a statement of the respective rights, limitations of rights, obligations, duties and immunities thereunder of the Company, the Guarantors, the Trustee and the Holders of the Securities and of the terms upon which the Securities are, and are to be, authenticated and delivered. This Security is one of the series designated on the face hereof. The Securities of this series are referred to herein as the “Notes.”

On or after the Par Call Date, the Company may redeem the Notes, in whole or in part, at any time and from time to time, at a redemption price equal to 100% of the principal amount of the Notes to be redeemed, plus any accrued and unpaid interest thereon to, but excluding, the Redemption Date (subject to the right of holders of record on the relevant record date to receive interest due on an Interest Payment Date that is on or prior to the Redemption Date).

Prior to the Par Call Date, the Company may redeem the Notes at its option, in whole or in part, at any time and from time to time, at a redemption price (expressed as a percentage of principal amount and rounded to three decimal places) equal to the greater of:

(a) the sum of the present values of the remaining scheduled payments of principal and interest thereon discounted to the Redemption Date (assuming the Notes matured on the Par Call Date) on a semi-annual basis (assuming a 360-day year consisting of twelve 30-day months) at the Treasury Rate plus 20 basis points less (b) interest accrued to the Redemption Date, and

100% of the principal amount of the Notes to be redeemed,

plus, in either case, accrued and unpaid interest thereon to, but excluding, the Redemption Date.

The Company’s actions and determinations in determining the redemption price shall be conclusive and binding for all purposes, absent manifest error. The Trustee shall not be responsible for calculating the redemption price or any component thereof.

Notice of any redemption will be mailed or electronically delivered (or otherwise transmitted in accordance with the depositary’s procedures) at least 10 days but not more than 60 days before the Redemption Date to each Holder of Notes to be redeemed.

Unless the Company defaults in payment of the redemption price, on and after the Redemption Date, interest will cease to accrue on this Note or the portions hereof called for redemption.

In the event of redemption of this Note in part only, a new Note or Notes of like tenor for the unredeemed portion hereof will be issued in the name of the Holder hereof upon the cancellation hereof.

The Indenture contains provisions for defeasance at any time of (i) the entire indebtedness of this Note or (ii) certain restrictive covenants and Events of Default with respect to this Note, in each case upon compliance with certain conditions set forth in the Indenture.

If an Event of Default with respect to the Notes shall occur and be continuing, the principal of the Notes may be declared due and payable in the manner and with the effect provided in the Indenture.

The Guarantors fully, irrevocably, unconditionally and absolutely guarantee the due and punctual payment of the principal of, and premium, if any, and interest on such Notes, and all other amounts due and payable under the Indenture and such Notes by the Company to the Trustee or such Holders.

The Indenture permits, with certain exceptions as therein provided, the amendment thereof and the modification of the rights and obligations of the Company, the Guarantors and the rights of the Holders of the Securities of each series to be affected under the Indenture at any time by the Company, the Guarantors and the Trustee with the consent of not less than the Holders of a majority in principal amount of the Outstanding Securities of each series to be affected. The Indenture also contains provisions permitting the Holders of a majority in principal amount of the Outstanding Securities of each affected series, on behalf of the Holders of all Securities of such series, to waive compliance by the Company and the Guarantors with certain provisions of the Indenture. The Indenture permits, with certain exceptions as therein provided, the Holders of a majority in principal amount of Securities of any series then Outstanding to waive past defaults under the Indenture with respect to such series and their consequences. Any such consent or waiver by the Holder of this Note shall be conclusive and binding upon such Holder and all holders of Notes of which this Note is a predecessor Note, whether or not notation of such consent or waiver is made upon this or any other Note.

As provided in and subject to the provisions of the Indenture, the Holder of this Note shall not have the right to institute any action or proceeding with respect to the Indenture or for the appointment of a receiver or trustee or for any other remedy thereunder, unless such Holder shall have previously given the Trustee written notice of a continuing Event of Default with respect to the Notes, the Holders of not less than 25% in principal amount of the Notes at the time Outstanding shall have made written request to the Trustee to institute proceedings in respect of such Event of Default and offered the Trustee reasonable indemnity against costs, expenses and

liabilities to be incurred in compliance with such request and the Trustee shall not have received from the Holders of a majority in principal amount of Notes at the time Outstanding a direction inconsistent with such request, and the Trustee shall have failed to institute any such proceeding for 60 days after receipt of such notice, request and offer of indemnity. The foregoing shall not apply to any suit instituted by the Holder of this Note for the enforcement of any payment of principal hereof or any premium or interest hereon on or after the respective due dates expressed herein.

No reference herein to the Indenture and no provision of this Note or of the Indenture shall alter or impair the obligation of the Company, which is absolute and unconditional, to pay the principal of and any premium and interest on this Note at the times, place(s) and rate, and in the currency, herein prescribed.

[If a Global Security, insert - This Global Security or portion hereof may not be exchanged for definitive Securities of this series except in the limited circumstances provided in the Indenture.

The holders of beneficial interests in this Global Security will not be entitled to receive physical delivery of definitive Securities except as described in the Indenture and will not be considered the Holders thereof for any purpose under the Indenture.]

[If a definitive Security, insert - As provided in the Indenture and subject to certain limitations therein set forth, the transfer of this Note is registerable in the Security Register, upon surrender of this Note for registration of transfer at the office or agency of the Company in The City of New York, or, subject to any laws or regulations applicable thereto and to the right of the Company (limited as provided in the Indenture) to rescind the designation of any such transfer agent, at the offices of ______________ in the Borough of Manhattan, The City of New York, and at such other offices or agencies as the Company may designate, duly endorsed by, or accompanied by a written instrument of transfer in form satisfactory to the Company and the Security Registrar duly executed by, the Holder hereof or his attorney duly authorized in writing, and thereupon one or more new Notes of like tenor, of authorized denominations and for the same aggregate principal amount, will be issued to the designated transferee or transferees.]

The Notes are issuable only in registered form without coupons in denominations of $2,000 and any whole multiple of $1,000 in excess thereof. As provided in the Indenture and subject to certain limitations therein set forth, Notes are exchangeable for a like aggregate principal amount of Notes and of like tenor of a different authorized denomination, as requested by the Holder surrendering the same.

No service charge shall be made for any such registration of transfer or exchange, but the Company may require payment of a sum sufficient to cover any tax or other governmental charge payable in connection therewith.

Prior to due presentment of this Note for registration of transfer, the Company, the Trustee and any agent of the Company or the Trustee may treat the Person in whose name this Note is registered as the owner hereof for all purposes, whether or not this Note is overdue, and neither the Company, the Trustee nor any such agent shall be affected by notice to the contrary.

This Note shall be governed by and construed in accordance with the laws of the State of New York. The Notes are subject to the provisions of the Trust Indenture Act that are required to be part of the Notes and shall, to the extent applicable, be governed by such provisions.

All terms used in this Note which are defined in the Indenture shall have the meanings assigned to them in the Indenture.

[If a definitive Security, insert as a separate page -

FOR VALUE RECEIVED, the undersigned hereby sell(s), assign(s) and transfer(s) unto (Please Print or Typewrite Name and Address of Assignee) the within instrument of ONEOK, INC. and does hereby irrevocably constitute and appoint agent to transfer said instrument on the books of the within-named Company, with full power of substitution in the premises.

Please Insert Social Security or Other Identifying Number of Assignee:




Dated:

		(Signature)


Signature Guarantee:
		(Participant in a Recognized Signature Guaranty Medallion Program)

NOTICE: The signature to this assignment must correspond with the name as written upon the face of the within instrument in every particular, without alteration or enlargement or any change whatever.]

[If a Global Security, insert as a separate page -

SCHEDULE OF INCREASES OR DECREASES

IN GLOBAL SECURITY

The following increases or decreases in this Global Security have been made:


Date of Exchange		Amount of Decrease in Principal Amount of this Global Security		Amount of Increase in Principal Amount of this Global Security		Principal Amount of this Global Security following such decrease (or increase)		Signature of authorized officer of Trustee or Depositary]