# EDGAR Filing Document

**Accession Number:** 0001039684
**File Stem:** 0001193125-25-179986
**Filing Date:** 2025-8
**Character Count:** 253513
**Document Hash:** bfb102295d88e559d2ef1eaa7c6b2c67
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-25-179986.hdr.sgml**: 20250813

**ACCESSION NUMBER**: 0001193125-25-179986

**CONFORMED SUBMISSION TYPE**: 8-K

**PUBLIC DOCUMENT COUNT**: 25

**CONFORMED PERIOD OF REPORT**: 20250812

**ITEM INFORMATION**: Entry into a Material Definitive Agreement

**ITEM INFORMATION**: Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

**ITEM INFORMATION**: Financial Statements and Exhibits

**FILED AS OF DATE**: 20250813

**DATE AS OF CHANGE**: 20250813

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** ONEOK INC /NEW/
- **CENTRAL INDEX KEY:** 0001039684
- **STANDARD INDUSTRIAL CLASSIFICATION:** NATURAL GAS TRANSMISSION & DISTRIBUTION [4923]
- **ORGANIZATION NAME:** 01 Energy & Transportation
- **EIN:** 731520922
- **STATE OF INCORPORATION:** OK
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 8-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-13643
- **FILM NUMBER:** 251213122

**BUSINESS ADDRESS:**
- **STREET 1:** 100 WEST 5TH ST
- **CITY:** TULSA
- **STATE:** OK
- **ZIP:** 74103
- **BUSINESS PHONE:** 9185887000

**MAIL ADDRESS:**
- **STREET 1:** 100 WEST 5TH ST
- **CITY:** TULSA
- **STATE:** OK
- **ZIP:** 74103

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** WAI INC
- **DATE OF NAME CHANGE:** 19970519

?xml version='1.0' encoding='ASCII'? 8-K

### UNITED STATES

### SECURITIES AND EXCHANGE COMMISSION

#### Washington, D.C. 20549

### FORM 8-K

#### CURRENT REPORT

#### Pursuant to Section 13 or 15(d)

#### of the Securities Exchange Act of 1934

#### Date of Report (date of earliest event reported): August 12, 2025
![LOGO](g17085g06i13.jpg)

## ONEOK, Inc.

#### (Exact name of registrant as specified in its charter)

---

| | | |
|:---|:---|:---|
| **Oklahoma** | **001-13643** | **73-1520922** |
| **(State or other jurisdiction<br>of incorporation)** | **(Commission**<br> **File Number)** | **(I.R.S. Employer<br>Identification No.)** |

---

#### 100 West Fifth Street; Tulsa, OK

#### (Address of principal executive offices)

#### 74103

#### (Zip Code)
(918) 588-7000

#### (Registrant's telephone number, including area code)

#### Not Applicable

#### (Former name or former address, if changed since last report)
Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

---

| | | |
|:---|:---|:---|
| **Title of each class** | **Trading**<br> **symbol(s)** | **Name of each exchange<br>on which registered** |
| Common stock, par value of $0.01 | OKE | New York Stock Exchange |

---

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

------

---

| | |
|:---|:---|
| **Item 1.01** | **Entry into a Material Definitive Agreement.**  |

---

*Issuance of Notes*

On August 12, 2025, ONEOK, Inc. ("ONEOK") completed its previously announced underwritten public offering (the "Offering") of $750 million aggregate principal amount of its 4.950% notes due 2032 (the "2032 Notes"), $1.0 billion aggregate principal amount of its 5.400% notes due 2035 (the "2035 Notes") and $1.25 billion aggregate principal amount of its 6.250% notes due 2055 (the "2055 Notes" and, together with the 2032 Notes and the 2035 Notes, the "Notes"). The Notes are guaranteed by 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., a Delaware limited liability company ("Elk Merger Sub II") and EnLink Midstream Partners, LP, a Delaware limited partnership (together with ONEOK Partners, ONEOK Partners Intermediate, Magellan and Elk Merger Sub II, the "Guarantors").

ONEOK intends to use the net proceeds from the Offering of approximately $2.959 billion, after deducting underwriting discounts and estimated offering expenses, to repay all of its outstanding commercial paper and repay in full at maturity its senior notes due September 15, 2025, together with any accrued and unpaid interest to the date of repayment. ONEOK intends to use any remaining net proceeds from the Offering for general corporate purposes, which may include the repayment of outstanding indebtedness, including the repurchase or redemption of existing notes.

*Supplemental Indentures and Notes* 

ONEOK registered the sale of the Notes with the Securities and Exchange Commission pursuant to a Registration Statement on Form S-3 (Registration No. 333-272782) filed on June 20, 2023, as amended by Post-Effective Amendment No. 1 to Form S-3, filed on September 10, 2024, and Post-Effective Amendment No. 2 to Form S-3, filed on August 6, 2025.

The terms of the Notes and the guarantees related thereto are governed by the Indenture, dated as of January 26, 2012, between ONEOK and U.S. Bank Trust Company, National Association (successor in interest to U.S. Bank National Association), as trustee (the "Trustee"), as supplemented by (i) the Thirty-Third Supplemental Indenture in the case of the 2032 Notes, (ii) the Thirty-Fourth Supplemental Indenture in the case of the 2035 Notes and (iii) the Thirty-Fifth Supplemental Indenture in the case of the 2055 Notes, and in each case dated as of August 12, 2025, by and among ONEOK, the Guarantors and the Trustee (collectively, the "Supplemental Indentures").

The foregoing description of the Supplemental Indentures is qualified in its entirety by reference to the Supplemental Indentures, copies of which are filed herewith as Exhibits 4.2, 4.3 and 4.4 and are incorporated herein by reference, and to the forms of the Notes, copies of which are filed herewith as Exhibits 4.5, 4.6 and 4.7 and are incorporated herein by reference.

*Affiliations* 

The Underwriters and their respective affiliates are full service financial institutions engaged in various activities, which may include securities trading, commercial and investment banking, financial advisory, investment management, principal investment, hedging, financing and brokerage activities. The Underwriters and their respective affiliates have provided in the past and may provide from time to time in the future certain commercial banking, financial advisory, investment banking and other services for ONEOK or its subsidiaries for which they will receive customary fees. Affiliates of certain of the Underwriters are also agents and/or lenders under ONEOK's credit facilities and dealers under ONEOK's commercial paper program.

The Trustee and certain of its affiliates have from time to time performed, and may in the future perform, various financial advisory, commercial and investment banking services for ONEOK or the Guarantors for which they received or will receive customary fees and expenses. The Trustee is a lender under ONEOK's credit facility and an affiliate of the Trustee is an Underwriter.

------

---

| | |
|:---|:---|
| **Item 2.03** | **Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant.**  |

---

The information included under "Supplemental Indentures and Notes" in Item 1.01 above is incorporated herein by reference.

---

| | |
|:---|:---|
| **Item 9.01.** | **Financial Statements and Exhibits**  |

---

---

| | |
|:---|:---|
| Exhibit<br> Number | Description |
| 4.1 | [Indenture, dated January 26, 2012, among ONEOK, Inc. and U.S. Bank National Association, as trustee (incorporated by reference to Exhibit 4.1 to ONEOK, Inc.'s Current Report on Form 8-K filed January 26, 2012 (File No. 1-13643)).](http://www.sec.gov/Archives/edgar/data/1039684/000119312512025265/d288044dex41.htm) |
| 4.2 | [Thirty-Third Supplemental Indenture, dated as of August 12, 2025, among ONEOK, Inc., ONEOK Partners, L.P., ONEOK Partners Intermediate Limited Partnership, Magellan Midstream Partners, L.P., Elk Merger Sub II, L.L.C., EnLink Midstream Partners, LP and U.S. Bank National Association, as trustee, with respect to 4.950% Notes due 2032.](d17085dex42.htm) |
| 4.3 | [Thirty-Fourth Supplemental Indenture, dated as of August 12, 2025, among ONEOK, Inc., ONEOK Partners, L.P., ONEOK Partners Intermediate Limited Partnership, Magellan Midstream Partners, L.P., Elk Merger Sub II, L.L.C., EnLink Midstream Partners, LP and U.S. Bank National Association, as trustee, with respect to 5.400% Notes due 2035.](d17085dex43.htm) |
| 4.4 | [Thirty-Fifth Supplemental Indenture, dated as of August 12, 2025, among ONEOK, Inc., ONEOK Partners, L.P., ONEOK Partners Intermediate Limited Partnership, Magellan Midstream Partners, L.P., Elk Merger Sub II, L.L.C., EnLink Midstream Partners, LP and U.S. Bank National Association, as trustee, with respect to 6.250% Notes due 2055.](d17085dex44.htm) |
| 4.5 | [Form of Note due 2032 (included in Exhibit 4.1 hereto).](d17085dex45.htm) |
| 4.6 | [Form of Note due 2035 (included in Exhibit 4.2 hereto).](d17085dex46.htm) |
| 4.7 | [Form of Note due 2055 (included in Exhibit 4.3 hereto).](d17085dex47.htm) |
| 5.1 | [Opinion of Latham & Watkins LLP.](d17085dex51.htm) |
| 5.2 | [Opinion of GableGotwals.](d17085dex52.htm) |
| 23.1 | [Consent of Latham & Watkins LLP (included in Exhibit 5.1 hereto).](d17085dex51.htm) |
| 23.2 | [Consent of GableGotwals (included in Exhibit 5.2 hereto).](d17085dex52.htm) |
| 104 | Cover Page Interactive Data File - the cover page XBRL tags are embedded within the Inline XBRL document (contained in Exhibit 101). |

---

------

#### SIGNATURES
Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

---

| | | |
|:---|:---|:---|
|  | **ONEOK, INC.** | **ONEOK, INC.** |
| Date: August 13, 2025 | By: | /s/ Walter S. Hulse III |
|  | Name: | Walter S. Hulse III |
|  | Title: | Chief Financial Officer, Treasurer and<br> Executive Vice President, Investor Relations <br>and Corporate Development |

---

## Exhibit 4.2

**Exhibit 4.2** 

***Execution Version*** 

**ONEOK, INC.** 

**as Issuer;** 

**ONEOK PARTNERS, L.P.** 

**ONEOK PARTNERS INTERMEDIATE LIMITED PARTNERSHIP,** 

**MAGELLAN MIDSTREAM PARTNERS, L.P.,** 

**ENLINK MIDSTREAM PARTNERS, LP,** 

**and** 

**ELK MERGER SUB II, L.L.C.** 

**as Guarantors; and** 

**U.S. BANK TRUST COMPANY, NATIONAL ASSOCIATION** 

**as Trustee** 

**THIRTY-THIRD SUPPLEMENTAL INDENTURE** 

**Dated as of August 12, 2025** 

**to** 

**INDENTURE** 

**relating to Securities Dated as of January 26, 2012** 

**4.950% Notes due 2032** 

------

**TABLE OF CONTENTS** 

---

| | | |
|:---|:---|:---|
|  |  | <u>Page</u> |
| ARTICLE 1 Relation to Indenture; Definitions and Other Provisions of General Application | ARTICLE 1 Relation to Indenture; Definitions and Other Provisions of General Application | 1 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; SECTION 1.01. | Relation to Indenture | 1 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; SECTION 1.02. | Definitions | 2 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; SECTION 1.03. | General References | 3 |
| ARTICLE 2 The Series of Securities | ARTICLE 2 The Series of Securities | 3 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; SECTION 2.01. | The Form and Title of the Securities | 3 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; SECTION 2.02. | Amount | 4 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; SECTION 2.03. | Stated Maturity | 4 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; SECTION 2.04. | Interest and Interest Rates | 4 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; SECTION 2.05. | Optional Redemption | 4 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; SECTION 2.06. | Global Securities | 4 |
| ARTICLE 3 Agreement to Guarantee | ARTICLE 3 Agreement to Guarantee | 5 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; SECTION 3.01. | Unconditional Guarantee | 5 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; SECTION 3.02. | Limitation on Guarantor Liability | 7 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; SECTION 3.03. | No Requirement to Endorse Notation of Guarantee | 7 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; SECTION 3.04. | Release of Guarantee | 7 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; SECTION 3.05. | Benefits Acknowledged | 8 |
| ARTICLE 4 EVENTS OF DEFAULT | ARTICLE 4 EVENTS OF DEFAULT | 8 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; SECTION 4.01. | EVENTS OF DEFAULT | 8 |
| ARTICLE 5 Miscellaneous | ARTICLE 5 Miscellaneous | 9 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; SECTION 5.01. | Notices | 9 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; SECTION 5.02. | No Recourse Against Others | 9 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; SECTION 5.03. | Certain Trustee Matters | 9 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; SECTION 5.04. | Continued Effect | 10 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; SECTION 5.05. | Governing Law | 10 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; SECTION 5.06. | Counterparts | 10 |

---

<u>EXHIBITS</u> 

Exhibit A: Form of Note

------

**THIRTY-THIRD SUPPLEMENTAL INDENTURE,** dated as of August 12, 2025 (this "***Supplemental Indenture***"), among ONEOK, INC., an Oklahoma corporation (the "***Company***"), **ONEOK PARTNERS, L.P.,** a Delaware limited partnership ("***ONEOK Partners***"), **ONEOK PARTNERS INTERMEDIATE LIMITED PARTNERSHIP,** a Delaware limited partnership (the "***Intermediate Partnership***"), **MAGELLAN MIDSTREAM PARTNERS, L.P.**, a Delaware limited partnership ("***Magellan***"), **ENLINK MIDSTREAM PARTNERS, LP**, a Delaware limited partnership ("***ENLK***"), **ELK MERGER SUB II, L.L.C.**, a Delaware limited liability company ("***Merger Sub II***" and, together with ONEOK Partners, the Intermediate Partnership, Magellan and ENLK, the "***Guarantors***"), and **U.S. BANK TRUST COMPANY, NATIONAL ASSOCIATION** (successor in interest to U.S. Bank National Association), as trustee under the Indenture referred to below (in such capacity, the "***Trustee***").

**RECITALS OF THE COMPANY** 

WHEREAS, the Company and the Trustee have heretofore entered into an Indenture, dated as of January 26, 2012 (the "***Original Indenture***") (the Original Indenture, as amended and supplemented from time to time, including without limitation pursuant to this Supplemental Indenture, being referred to herein as the "***Indenture***"); and

WHEREAS, under the Original Indenture, a new series of Securities may at any time be established by the Board of Directors of the Company, in accordance with the provisions of the Original Indenture, and the terms of such series may be established by an indenture supplemental to the Original Indenture; and

WHEREAS, the Company proposes to create under the Indenture a new series of Securities; and

WHEREAS, in connection with the issuance of the Notes (as herein defined), each of the Guarantors desires to become a guarantor of, and provide a guarantee of, the Notes; and

WHEREAS, all acts and things necessary to make the Notes and Guarantees (as herein defined), when executed by the Company and the Guarantors, respectively, and when the Notes are authenticated and delivered by the Trustee as provided in the Original Indenture and this Supplemental Indenture, the valid and binding obligations of the Company and the Guarantors, and to make this Supplemental Indenture a valid and binding agreement in accordance with the Original Indenture have been done or performed.

**ARTICLE 1** 

**Relation to Indenture; Definitions and** 

**Other Provisions of General Application** 

**SECTION 1.01. *Relation to Indenture***.

NOW, THEREFORE, in consideration of the premises, agreements and obligations set forth herein and for other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the parties hereto hereby agree, for the equal and proportionate benefit of all Holders of the Notes, as follows:

With respect to the Notes, this Supplemental Indenture constitutes an integral part of the Indenture.

------

**SECTION 1.02. *Definitions***.

Except as may be provided in a future indenture supplemental to the Original Indenture, for the benefit of the Holders of the Notes but no other series of Securities under the Indenture, whether now or hereafter issued and Outstanding, Article One of the Original Indenture shall be amended by adding the following defined terms to Section 101 in appropriate alphabetical sequence. For all purposes of this Supplemental Indenture, capitalized terms used herein and not otherwise defined herein shall have the meanings assigned thereto in the Original Indenture.

"***Par Call Date***" means August 15, 2032 (two months prior to the maturity date of the Notes).

"***Treasury Rate***" means, with respect to any Redemption Date, the yield determined by the Company in accordance with the following two paragraphs.

The Treasury Rate shall be determined by the Company after 4:15 p.m., New York City time (or after such time as yields on U.S. government securities are posted daily by the Board of Governors of the Federal Reserve System), on the third Business Day preceding the date of the notice of redemption relating to such Redemption Date based upon the yield or yields for the most recent day that appear after such time on such day in the most recent statistical release published by the Board of Governors of the Federal Reserve System designated as "Selected Interest Rates (Daily)-H.15" (or any successor designation or publication) ("***H.15***") under the caption "U.S. government securities-Treasury constant maturities-Nominal" (or any successor caption or heading) ("***H.15 TCM***"). In determining the Treasury Rate, the Company shall select, as applicable: (i) the yield for the Treasury constant maturity on H.15 exactly equal to the period from the Redemption Date to the Par Call Date (the "***Remaining Life***"); or (ii) if there is no such Treasury constant maturity on H.15 exactly equal to the Remaining Life, the two yields-one yield corresponding to the Treasury constant maturity on H.15 immediately shorter than and one yield corresponding to the Treasury constant maturity on H.15 immediately longer than the Remaining Life-and shall interpolate to the Par Call Date on a straight-line basis (using the actual number of days) using such yields and rounding the result to three decimal places; or (iii) if there is no such Treasury constant maturity on H.15 shorter than or longer than the Remaining Life, the yield for the single Treasury constant maturity on H.15 closest to the Remaining Life. For purposes of this paragraph, the applicable Treasury constant maturity or maturities on H.15 shall be deemed to have a maturity date equal to the relevant number of months or years, as applicable, of such Treasury constant maturity from the Redemption Date.

If on the third Business Day preceding the date of the notice of redemption relating to such Redemption Date H.15 TCM is no longer published, the Company shall calculate the Treasury Rate based on the rate per annum equal to the semi-annual equivalent yield to maturity at 11:00 a.m., New York City time, on the second Business Day preceding the date of such notice of

------

redemption of the United States Treasury security maturing on, or with a maturity that is closest to, the Par Call Date, as applicable. If there is no United States Treasury security maturing on the Par Call Date but there are two or more United States Treasury securities with a maturity date equally distant from the Par Call Date, one with a maturity date preceding the Par Call Date and one with a maturity date following the Par Call Date, the Company shall select the United States Treasury security with a maturity date preceding the Par Call Date. If there are two or more United States Treasury securities maturing on the Par Call Date or two or more United States Treasury securities meeting the criteria of the preceding sentence, the Company shall select from among these two or more United States Treasury securities the United States Treasury security that is trading closest to par based upon the average of the bid and asked prices for such United States Treasury securities at 11:00 a.m., New York City time. In determining the Treasury Rate in accordance with the terms of this paragraph, the semi-annual yield to maturity of the applicable United States Treasury security shall be based upon the average of the bid and asked prices (expressed as a percentage of principal amount) at 11:00 a.m., New York City time, of such United States Treasury security, and rounded to three decimal places.

**SECTION 1.03. *General References***.

All references in this Supplemental Indenture to Articles and Sections, unless otherwise specified, refer to the corresponding Articles and Sections of this Supplemental Indenture; and the terms "*herein*," "*hereof*," "*hereunder*" and any other word of similar import refers to this Supplemental Indenture.

**ARTICLE 2** 

**The Series of Securities** 

**SECTION 2.01. *The Form and Title of the Securities***.

There is hereby established a new series of Securities to be issued under the Indenture and to be designated as the Company's 4.950% Notes due 2032 (the "***Notes***"). The Notes shall be substantially in the form attached as <u>Exhibit A</u> hereto, in each case with such appropriate insertions, omissions, substitutions and other variations as are required or permitted by the Indenture, and may have such letters, numbers or other marks of identification and such legends or endorsements placed thereon as the Company may deem appropriate or as may be required or appropriate to comply with any laws or with any rules made pursuant thereto or with the rules of any securities exchange or automated quotation system on which the Notes may be listed or traded, or to conform to general usage, or as may, consistently with the Indenture, be determined by the officers executing such Notes, as evidenced by their execution thereof. The Notes and any beneficial interest in the Notes shall be in minimum denominations of $2,000 and integral multiples of $1,000 in excess thereof.

The Notes shall be executed, authenticated and delivered in accordance with the provisions of, and shall in all respects be subject to, the terms, conditions and covenants of the Original Indenture as supplemented by this Supplemental Indenture (including the form of Note set forth as <u>Exhibit A</u> hereto (the terms of which are incorporated in and made a part of this Supplemental Indenture for all intents and purposes)).

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**SECTION 2.02. *Amount***.

The aggregate principal amount of the Notes which may be authenticated and delivered pursuant hereto is unlimited. The Trustee shall initially authenticate and deliver Notes for original issue in an initial aggregate principal amount of up to $750,000,000 upon delivery to the Trustee of a Company Order for the authentication and delivery of such Notes. The aggregate principal amount of the Notes to be issued hereunder may be increased at any time hereafter and the series may be reopened for issuances of additional Notes upon Company Order without the consent of any Holder. The Notes issued on the date hereof and any such additional Notes that may be issued hereafter shall be part of the same series of Securities for all purposes under the Indenture.

**SECTION 2.03. *Stated Maturity***.

The Notes may be issued on any Business Day on or after August 12, 2025, and the Stated Maturity of the Notes shall be October 15, 2032.

**SECTION 2.04. *Interest and Interest Rates***.

The rate or rates at which the Notes shall bear interest, the date or dates from which such interest shall accrue, the interest payment dates on which any such interest shall be payable and the regular record date for any interest payable on any interest payment date, in each case, shall be as set forth in the form of Note set forth as <u>Exhibit A</u> hereto.

**SECTION 2.05. *Optional Redemption***.

At its option, the Company may redeem the Notes, in whole or in part, in principal amounts of $2,000 and in integral multiples of $1,000 in excess thereof, at any time or from time to time, at the applicable Redemption Price determined as set forth in the form of Note attached hereto as <u>Exhibit A</u>, in accordance with the terms set forth in the Notes and in accordance with Article Eleven of the Original Indenture. No notes of a principal amount of $1,000 or less will be redeemed in part.

**SECTION 2.06. *Global Securities***.

The Notes shall initially be issuable in whole or in part in the form of one or more Global Securities. Such Global Securities (i) shall be deposited with, or on behalf of, The Depository Trust Company, which shall act as Depositary with respect to the Notes, (ii) shall bear the legends applicable to Global Securities set forth in Section 204 of the Original Indenture, (iii) may be exchanged in whole or in part for Notes in definitive form upon the terms and subject to the conditions provided in Section 304 of the Original Indenture and in this Supplemental Indenture and (iv) shall otherwise be subject to the applicable provisions of the Indenture.

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**ARTICLE 3** 

**Agreement to Guarantee** 

**SECTION 3.01. *Unconditional Guarantee***.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(a) For value received, subject to <u>Section</u> <u>3.04</u> hereof, each of the Guarantors hereby fully, irrevocably, unconditionally and absolutely guarantees to the Holders of the Notes and to the Trustee 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 (including, without limitation, all costs and expenses (including reasonable legal fees and disbursements of its agents and counsel) incurred by the Trustee or such Holders in connection with the enforcement of the Indenture and the Guarantees) (collectively, the "***Indenture Obligations***"), when and as such amounts shall become due and payable, whether at the Stated Maturity, upon redemption or by declaration of acceleration or otherwise, according to the terms of such Notes and the Indenture. The guarantees by the Guarantors set forth in this <u>Article 3</u> are referred to herein as the "***Guarantees.***" Without limiting the generality of the foregoing, each Guarantor's liability shall extend to all amounts that constitute part of the Indenture Obligations and would be owed by the Company to the Trustee or such Holders under the Indenture and such Notes but for the fact that they are unenforceable, reduced, limited, impaired, suspended or not allowable due to the existence of a bankruptcy, reorganization or similar proceeding involving the Company.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(b) Failing payment when due of any amount guaranteed pursuant to the Guarantees, for whatever reason, each Guarantor will be obligated (to the fullest extent permitted by applicable law) to pay the same immediately to the Trustee, without set-off or counterclaim or other reduction whatsoever (whether for taxes, withholding or otherwise). The Guarantees hereunder are intended to be a general, unsecured, senior obligation of each Guarantor and will rank *pari passu* in right of payment with all unsecured indebtedness of such Guarantor that is not, by its terms, expressly subordinated in right of payment to the Guarantees of such Guarantor. Each Guarantor hereby agrees that, to the fullest extent permitted by applicable law, subject to <u>Section</u> <u>3.04</u> hereof, its obligations hereunder shall be full, irrevocable, unconditional and absolute, irrespective of the validity, regularity or enforceability of such Notes, the Guarantees or the Indenture, the absence of any action to enforce the same, any waiver or consent by any such Holder with respect to any provisions hereof or thereof, the recovery of any judgment against the Company, any action to enforce the same or any other circumstance which might otherwise constitute a legal or equitable discharge or defense of such Guarantor. Each Guarantor hereby agrees that in the event of a default in payment of any Indenture Obligations, whether at the Stated Maturity, upon redemption or by declaration of acceleration or otherwise, legal proceedings may be instituted by the Trustee on behalf of such Holders or, subject to Section 507 of the Indenture, by such Holders, on the terms and conditions set forth in the Indenture, directly against such Guarantor to enforce the Guarantees without first proceeding against the Company.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(c) To the fullest extent permitted by applicable law, subject to <u>Section</u> <u>3.04</u> hereof, the obligations of each Guarantor under this <u>Article 3</u> shall be as aforesaid full, irrevocable, unconditional and absolute and shall not be impaired, modified, discharged, released or limited by any occurrence or condition whatsoever, including, without limitation, (i) any compromise, settlement, release, waiver, renewal, extension, indulgence or modification of, or any change in,

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any of the obligations and liabilities of the Company or each Guarantor contained in any of such Notes or the Indenture, (ii) any impairment, modification, release or limitation of the liability of the Company, each Guarantor or any of their estates in bankruptcy, or any remedy for the enforcement thereof, resulting from the operation of any present or future provision of any applicable Bankruptcy Law, as amended, or other statute or from the decision of any court, (iii) the assertion or exercise by the Trustee or any such Holder of any rights or remedies under any of such Notes or the Indenture or their delay in or failure to assert or exercise any such rights or remedies, (iv) the assignment or the purported assignment of any property as security for any of such Notes, including all or any part of the rights of the Company or each Guarantor under the Indenture, (v) the extension of the time for payment by the Company or each Guarantor of any payments or other sums or any part thereof owing or payable under any of the terms and provisions of any of such Notes or the Indenture or of the time for performance by the Company or each Guarantor of any other obligations under or arising out of any such terms and provisions or the extension or the renewal of any thereof, (vi) the modification or amendment (whether material or otherwise) of any duty, agreement or obligation of the Company or each Guarantor set forth in the Indenture, (vii) the voluntary or involuntary liquidation, dissolution, sale or other disposition of all or substantially all of the assets, marshaling of assets and liabilities, receivership, insolvency, bankruptcy, assignment for the benefit of creditors, reorganization, arrangement, composition or readjustment, rehabilitation or relief of, or other similar proceeding affecting, the Company or each Guarantor or any of their respective assets, or the disaffirmance of any of such Notes, the Guarantees or the Indenture in any such proceeding, (viii) the release or discharge of the Company or each Guarantor from the performance or observance of any agreement, covenant, term or condition contained in any of such instruments by operation of law, (ix) the unenforceability of any of such Notes, the Guarantees or the Indenture, (x) any change in the name, business, capital structure, corporate existence, or ownership of the Company or each Guarantor, or (xi) any other circumstance which might otherwise constitute a defense available to, or a legal or equitable discharge of, a surety or each Guarantor.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(d) To the fullest extent permitted by applicable law, each Guarantor hereby (i) waives diligence, presentment, demand of payment, notice of acceptance, filing of claims with a court in the event of the merger, insolvency or bankruptcy of the Company or such Guarantor, and all demands and notices whatsoever, (ii) acknowledges that any agreement, instrument or document evidencing the Guarantees may be transferred and that the benefit of its obligations hereunder shall extend to each holder of any agreement, instrument or document evidencing the Guarantees without notice to them and (iii) covenants that its Guarantees will not be discharged except by complete performance of the Guarantees. To the fullest extent permitted by applicable law, each Guarantor further agrees that if at any time all or any part of any payment theretofore applied by any Person to any Guarantees is, or must be, rescinded or returned for any reason whatsoever, including without limitation, the insolvency, bankruptcy or reorganization of each Guarantor, such Guarantees shall, to the extent that such payment is or must be rescinded or returned, be deemed to have continued in existence notwithstanding such application, and the Guarantees shall continue to be effective or be reinstated, as the case may be, as though such application had not been made.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(e) Each Guarantor shall be subrogated to all rights of the Holders and the Trustee against the Company in respect of any amounts paid by such Guarantor pursuant to the provisions of the Indenture; *provided*, *however*, that such Guarantor shall not be entitled to enforce or to receive any payments arising out of, or based upon, such right of subrogation with respect to any of such Notes until all of such Notes and the Guarantees shall have been indefeasibly paid in full or discharged.

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(f) To the fullest extent permitted by applicable law, no failure to exercise and no delay in exercising, on the part of the Trustee or the Holders, any right, power, privilege or remedy under this <u>Article 3</u> and the Guarantees shall operate as a waiver thereof, nor shall any single or partial exercise of any rights, power, privilege or remedy preclude any other or further exercise thereof, or the exercise of any other rights, powers, privileges or remedies. The rights and remedies herein provided for are cumulative and not exclusive of any rights or remedies provided in law or equity. Nothing contained in this <u>Article 3</u> shall limit the right of the Trustee or the Holders to take any action to accelerate the maturity of such Notes pursuant to Article Five of the Indenture or to pursue any rights or remedies under the Indenture or under applicable law.

**SECTION 3.02. *Limitation on Guarantor Liability***.

Each Guarantor and the Trustee hereby confirms that it is the intention of all such parties that the Guarantees of such Guarantor not constitute a fraudulent transfer or conveyance for purposes of Bankruptcy Law, the Uniform Fraudulent Conveyance Act, the Uniform Fraudulent Transfer Act or any similar federal or state law to the extent applicable to any Guarantees. To effectuate the foregoing intention, the Trustee and the Guarantors hereby irrevocably agree that the obligations of such Guarantor will be limited to the maximum amount that will, after giving effect to such maximum amount and all other contingent and fixed liabilities of such Guarantor that are relevant under such laws, and after giving effect to any collections from, rights to receive contribution from or payments made by or on behalf of the other Guarantor in respect of the obligations of such other Guarantor under this <u>Article 3</u>, result in the obligations of such Guarantor under its Guarantees not constituting a fraudulent transfer or conveyance.

**SECTION 3.03. *No Requirement to Endorse Notation of Guarantee***.

Each Guarantor hereby agrees that its execution and delivery of this Supplemental Indenture and the provisions set forth in this <u>Article 3</u> shall evidence its Guarantee without the need for notation on any Notes.

**SECTION 3.04. *Release of Guarantee***.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(a) Notwithstanding anything to the contrary in this <u>Article 3</u>, if a Guarantor (i) shall cease to be a subsidiary of the Company or (ii) shall no longer be (a) an obligor on, or issuer of, any capital markets debt securities or (b) a guarantor of any capital markets debt securities issued by the Company or the other Guarantor, in each case other than the Notes, then, if no Default or Event of Default shall have occurred and be continuing, such Guarantor, upon giving written notice to the Trustee to the foregoing effect, shall be deemed to be released from all of its obligations under the Indenture, and the Guarantees shall be of no further force or effect with respect to such Guarantor. Following the receipt by the Trustee of any such notice, the Company shall cause the Indenture to be amended as provided in Section 901 of the Indenture; *provided*, *however*, that the failure to so amend the Indenture shall not affect the validity of the termination of the Guarantees with respect to such Guarantor.

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(b) In addition, upon (i) the exercise of the legal defeasance or covenant defeasance option or the satisfaction and discharge of the Indenture as provided in Articles Fifteen and Four, respectively, of the Indenture with respect to a series of Notes or (ii) a series of Notes ceasing to be Outstanding, each of the Guarantors shall be deemed to be released from all its obligations under the Indenture with respect to such series of Notes and the Guarantees of such series of Notes shall be of no further force or effect.

**SECTION 3.05. *Benefits Acknowledged***.

Each Guarantor acknowledges that it shall receive direct and indirect benefits from the financing arrangements contemplated by the Indenture and from the Guarantees under this Supplemental Indenture.

**ARTICLE 4** 

**EVENTS OF DEFAULT** 

**SECTION 4.01. *EVENTS OF DEFAULT***.

Section 501 of the Original Indenture is replaced with respect to the Notes in its entirety by the following:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(a) "Event of Default", wherever used herein with respect to Securities of any series, means any one of the following events:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(i) default in the payment of any installment of interest upon any Security of such series when it becomes due and payable, continued for 30 days; or

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(ii) default in the payment of the principal of (or premium, if any, on) any Security of such series at its Maturity; or

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(iii) failure on the part of the Company to observe or perform any other covenant or agreement contained in this for 60 days after written notice of such failure, requiring the Company to remedy the same, has been given to the Company by the Trustee or to the Company and the Trustee by the Holders of at least 25% in aggregate principal amount of outstanding Securities of such series; or

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(iv) the entry of a decree or order by court having jurisdiction in the premises adjudging the Company a bankrupt or insolvent, or approving as properly filed a petition seeking reorganization, arrangement, adjustment or composition of or in respect of the Company under the Bankruptcy Code or any other applicable federal or state law, or appointing a receiver, liquidator, assignee, trustee, sequestrator (or other similar official) of the Company or of any substantial part of the property of the Company, or ordering the winding up or liquidation of the affairs of the Company, and the continuance of any such decree or order unstayed and in effect for a period of 90 consecutive days; or

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(v) the institution by the Company of proceedings to be adjudicated a bankrupt or insolvent, or the consent by the Company to the institution of bankruptcy or insolvency proceedings against it, or the filing by the Company of a petition or answer or consent seeking reorganization or relief under the Bankruptcy Code or any other applicable federal or state law, or the consent by the Company to the filing of any such petition or to the appointment of a receiver, liquidator, assignee, trustee, sequestrator (or other similar official) of the Company or of any substantial part of the property of the Company of an assignment for the benefit of creditors, or the admission by the Company in writing of its inability to pay its debts generally as they become due.

**ARTICLE 5** 

**Miscellaneous** 

**SECTION 5.01. *Notices***.

Notices to the Guarantors shall be made in accordance with Section 105 of the Indenture at the address for the Company set forth in such Section.

Notices to the Trustee shall be made in accordance with Section 105 of the Indenture at the Corporate Trust Office, currently located at 2 Concourse Parkway, Suite 800, Atlanta, Georgia 30328 Attention: Corporate Trust Department.

**SECTION 5.02. *No Recourse Against Others***.

No director, officer, employee, partner (including, for greater certainty, any general partner of any general partnership who is an individual person), incorporator, manager, stockholder or member of each Guarantor, as such, will have any liability for any obligations of the Company, such Guarantor or the other Guarantor under the Notes or the Indenture or for any claim based on, in respect of, or by reason of, such obligations or their creation. The waiver and release are part of the consideration for the issuance of the Guarantees and the Notes.

**SECTION 5.03. *Certain Trustee Matters***.

The recitals contained herein and in the Notes, except for the Trustee's Certificate of Authentication, shall be taken as the statements of the Company and the Guarantors, and the Trustee assumes no responsibility for their correctness.

The Trustee makes no representations as to the validity or sufficiency of this Supplemental Indenture or the Notes or the proper authorization or the due execution hereof or thereof by the Company or any of the Guarantors.

Except as expressly set forth herein, nothing in this Supplemental Indenture shall alter the duties, rights, privileges, immunities or obligations of the Trustee set forth in the Original Indenture, which shall be applicable in respect of the Notes and of this Supplemental Indenture as fully and with like effect as if set forth herein in full.

The Trustee makes no representation or warranty as to the validity or sufficiency of the information contained in the prospectus supplement or other disclosure materials related to the Notes, except such information which specifically pertains to the Trustee itself, or any information incorporated therein by reference with respect to the Trustee.

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**SECTION 5.04. *Continued Effect***.

Except as expressly supplemented and amended by this Supplemental Indenture, the Original Indenture shall continue in full force and effect in accordance with the provisions thereof, and the Original Indenture (as supplemented and amended by this Supplemental Indenture) is in all respects hereby ratified and confirmed. This Supplemental Indenture and all its provisions shall be deemed a part of the Original Indenture in the manner and to the extent herein and therein provided.

**SECTION 5.05. *Governing Law***.

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

**SECTION 5.06. *Counterparts***.

This instrument may be executed in any number of counterparts, each of which, when delivered, shall be deemed to be an original, but all such counterparts shall together constitute but one and the same instrument.

**(Signature Pages Follow)** 

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IN WITNESS WHEREOF, the parties hereto have caused this Supplemental Indenture to be duly executed and delivered, all as of the day and year first above written.

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| | |
|:---|:---|
| **ONEOK, INC.** | **ONEOK, INC.** |
| By: | /s/ Pierce H. Norton II |
| Name: | Pierce H. Norton II |
| Title: | President and Chief Executive Officer |

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| | |
|:---|:---|
| **ONEOK PARTNERS, L.P.** | **ONEOK PARTNERS, L.P.** |
| By: | ONEOK Partners GP, L.L.C., |
|  | its General Partner |

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| | |
|:---|:---|
| By: | /s/ Walter S. Hulse III |
| Name: | Walter S. Hulse III |
| Title: | Chief Financial Officer, Treasurer and Executive Vice President, Investor Relations and Corporate Development |

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| | |
|:---|:---|
| **ONEOK PARTNERS INTERMEDIATE LIMITED PARTNERSHIP** | **ONEOK PARTNERS INTERMEDIATE LIMITED PARTNERSHIP** |
| By: | ONEOK ILP GP, L.L.C., |
|  | its General Partner |

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| | |
|:---|:---|
| By: | /s/ Walter S. Hulse III |
| Name: | Walter S. Hulse III |
| Title: | Chief Financial Officer, Treasurer and Executive Vice President, Investor Relations and Corporate Development |

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| | |
|:---|:---|
| **MAGELLAN MIDSTREAM PARTNERS, L.P.** | **MAGELLAN MIDSTREAM PARTNERS, L.P.** |
| By: | Magellan GP, LLC, |
|  | its General Partner |

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| | |
|:---|:---|
| By: | /s/ Walter S. Hulse III |
| Name: | Walter S. Hulse III |
| Title: | Chief Financial Officer, Treasurer and Executive Vice President, Investor Relations and Corporate Development |

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*[Signature Page to Thirty-Third Supplemental Indenture]* 

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| | |
|:---|:---|
| **ENLINK MIDSTREAM PARTNERS, LP** | **ENLINK MIDSTREAM PARTNERS, LP** |
| By: | EnLink Midstream GP, LLC, |
|  | its General Partner |

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| | |
|:---|:---|
| By: | /s/ Walter S. Hulse III |
| Name: | Walter S. Hulse III |
| Title: | Chief Financial Officer, Treasurer and Executive Vice President, Investor Relations and Corporate Development |

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| | |
|:---|:---|
| **ELK MERGER SUB II, L.L.C.** | **ELK MERGER SUB II, L.L.C.** |
| By: | /s/ Walter S. Hulse III |
| Name: | Walter S. Hulse III |
| Title: | Chief Financial Officer, Treasurer and Executive Vice President, Investor Relations and Corporate Development |

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*[Signature Page to Thirty-Third Supplemental Indenture]* 

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| | |
|:---|:---|
| **U.S. BANK TRUST COMPANY, NATIONAL ASSOCIATION,** as Trustee | **U.S. BANK TRUST COMPANY, NATIONAL ASSOCIATION,** as Trustee |
| By: | /s/ Gregory M. Jackson |
| Name: | Gregory M. Jackson |
| Title: | Vice President |

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*[Signature Page to Thirty-Third Supplemental Indenture]* 

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**EXHIBIT A** 

**[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.** 

**4.950% Note due 2032** 

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| | |
|:---|:---|
| No. | U.S. $|

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CUSIP No. 682680 DB6

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<u> </u>, or registered assigns, the principal sum of<u> </u> United States Dollars ($) on October 15, 2032, 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 4.950% 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

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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<u> </u>, 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.

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

Dated: <u> </u>, ___

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| |
|:---|
| ONEOK, INC. |
| By: |
| Name: |
| Title: |

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| |
|:---|
| ATTEST |
| By: |
| Name: |
| Title: |

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*[Signature Page to 2032 Global Note A-[* ⚫ *]]* 

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**TRUSTEE'S CERTIFICATE OF AUTHENTICATION** 

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

Dated: _________________, ______

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| | |
|:---|:---|
| U.S. BANK TRUST COMPANY, NATIONAL ASSOCIATION, as Trustee | U.S. BANK TRUST COMPANY, NATIONAL ASSOCIATION, as Trustee |
| By: |  |
|  | *Authorized Signatory* |

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*[Signature Page to 2032 Global Note A-[* ⚫ *]]* 

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**[REVERSE OF NOTE]** 

**ONEOK, INC.** 

**4.950% Note due 2032** 

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-Third 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:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(1) (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

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(2) 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.

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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

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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.

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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.

[I*f 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:

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| | |
|:---|:---|
| Dated: | |
|  | (Signature) |

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Signature Guarantee:     <br> (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.]

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[*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:

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| | | | | |
|:---|:---|:---|:---|:---|
| **Date of<br>Exchange** | **Amount of<br>Decrease in<br>Principal<br>Amount of this<br>Global Security** | **Amount of<br>Increase in<br>Principal<br>Amount of this<br>Global Security** | **Principal<br>Amount of this<br>Global Security<br>following such<br>decrease (or<br>increase)** | **Signature of<br>authorized<br>officer of<br>Trustee or<br>Depositary]** |

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## Exhibit 4.3

**Exhibit 4.3** 

***Execution Version*** 

**ONEOK, INC.** 

**as Issuer;** 

**ONEOK PARTNERS, L.P.** 

**ONEOK PARTNERS INTERMEDIATE LIMITED PARTNERSHIP,** 

**MAGELLAN MIDSTREAM PARTNERS, L.P.,** 

**ENLINK MIDSTREAM PARTNERS, LP,** 

**and** 

**ELK MERGER SUB II, L.L.C.** 

**as Guarantors; and** 

**U.S. BANK TRUST COMPANY, NATIONAL ASSOCIATION** 

**as Trustee** 

**THIRTY-FOURTH SUPPLEMENTAL INDENTURE** 

**Dated as of August 12, 2025** 

**to** 

**INDENTURE** 

**relating to Securities Dated as of January 26, 2012** 

**5.400% Notes due 2035** 

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**TABLE OF CONTENTS** 

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| | | |
|:---|:---|:---|
|  |  | <u>Page</u> |
| ARTICLE 1 Relation to Indenture; Definitions and Other Provisions of General Application | ARTICLE 1 Relation to Indenture; Definitions and Other Provisions of General Application | 1 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; SECTION 1.01. | Relation to Indenture | 1 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; SECTION 1.02. | Definitions | 2 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; SECTION 1.03. | General References | 3 |
| ARTICLE 2 The Series of Securities | ARTICLE 2 The Series of Securities | 3 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; SECTION 2.01. | The Form and Title of the Securities | 3 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; SECTION 2.02. | Amount | 4 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; SECTION 2.03. | Stated Maturity | 4 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; SECTION 2.04. | Interest and Interest Rates | 4 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; SECTION 2.05. | Optional Redemption | 4 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; SECTION 2.06. | Global Securities | 4 |
| ARTICLE 3 Agreement to Guarantee | ARTICLE 3 Agreement to Guarantee | 4 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; SECTION 3.01. | Unconditional Guarantee | 4 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; SECTION 3.02. | Limitation on Guarantor Liability | 7 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; SECTION 3.03. | No Requirement to Endorse Notation of Guarantee | 7 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; SECTION 3.04. | Release of Guarantee | 7 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; SECTION 3.05. | Benefits Acknowledged | 8 |
| ARTICLE 4 EVENTS OF DEFAULT | ARTICLE 4 EVENTS OF DEFAULT | 8 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; SECTION 4.01. | EVENTS OF DEFAULT | 8 |
| ARTICLE 5 Miscellaneous | ARTICLE 5 Miscellaneous | 9 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; SECTION 5.01. | Notices | 9 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; SECTION 5.02. | No Recourse Against Others | 9 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; SECTION 5.03. | Certain Trustee Matters | 9 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; SECTION 5.04. | Continued Effect | 9 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; SECTION 5.05. | Governing Law | 10 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; SECTION 5.06. | Counterparts | 10 |

---

<u>EXHIBITS</u> 

Exhibit A: Form of Note

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**THIRTY-FOURTH SUPPLEMENTAL INDENTURE,** dated as of August 12, 2025 (this "***Supplemental Indenture***"), among ONEOK, INC., an Oklahoma corporation (the "***Company***"), **ONEOK PARTNERS, L.P.,** a Delaware limited partnership ("***ONEOK Partners***"), **ONEOK PARTNERS INTERMEDIATE LIMITED PARTNERSHIP,** a Delaware limited partnership (the "***Intermediate Partnership***"), **MAGELLAN MIDSTREAM PARTNERS, L.P.**, a Delaware limited partnership ("***Magellan***"), **ENLINK MIDSTREAM PARTNERS, LP**, a Delaware limited partnership ("***ENLK***"), **ELK MERGER SUB II, L.L.C.**, a Delaware limited liability company ("***Merger Sub II***" and, together with ONEOK Partners, the Intermediate Partnership, Magellan and ENLK, the "***Guarantors***"), and **U.S. BANK TRUST COMPANY, NATIONAL ASSOCIATION** (successor in interest to U.S. Bank National Association), as trustee under the Indenture referred to below (in such capacity, the "***Trustee***").

**RECITALS OF THE COMPANY** 

WHEREAS, the Company and the Trustee have heretofore entered into an Indenture, dated as of January 26, 2012 (the "***Original Indenture***") (the Original Indenture, as amended and supplemented from time to time, including without limitation pursuant to this Supplemental Indenture, being referred to herein as the "***Indenture***"); and

WHEREAS, under the Original Indenture, a new series of Securities may at any time be established by the Board of Directors of the Company, in accordance with the provisions of the Original Indenture, and the terms of such series may be established by an indenture supplemental to the Original Indenture; and

WHEREAS, the Company proposes to create under the Indenture a new series of Securities; and

WHEREAS, in connection with the issuance of the Notes (as herein defined), each of the Guarantors desires to become a guarantor of, and provide a guarantee of, the Notes; and

WHEREAS, all acts and things necessary to make the Notes and Guarantees (as herein defined), when executed by the Company and the Guarantors, respectively, and when the Notes are authenticated and delivered by the Trustee as provided in the Original Indenture and this Supplemental Indenture, the valid and binding obligations of the Company and the Guarantors, and to make this Supplemental Indenture a valid and binding agreement in accordance with the Original Indenture have been done or performed.

**ARTICLE 1** 

**Relation to Indenture; Definitions and** 

**Other Provisions of General Application** 

**SECTION 1.01. *Relation to Indenture***.

NOW, THEREFORE, in consideration of the premises, agreements and obligations set forth herein and for other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the parties hereto hereby agree, for the equal and proportionate benefit of all Holders of the Notes, as follows:

With respect to the Notes, this Supplemental Indenture constitutes an integral part of the Indenture.

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**SECTION 1.02. *Definitions***.

Except as may be provided in a future indenture supplemental to the Original Indenture, for the benefit of the Holders of the Notes but no other series of Securities under the Indenture, whether now or hereafter issued and Outstanding, Article One of the Original Indenture shall be amended by adding the following defined terms to Section 101 in appropriate alphabetical sequence. For all purposes of this Supplemental Indenture, capitalized terms used herein and not otherwise defined herein shall have the meanings assigned thereto in the Original Indenture.

"***Par Call Date***" means July 15, 2035 (three months prior to the maturity date of the Notes).

"***Treasury Rate***" means, with respect to any Redemption Date, the yield determined by the Company in accordance with the following two paragraphs.

The Treasury Rate shall be determined by the Company after 4:15 p.m., New York City time (or after such time as yields on U.S. government securities are posted daily by the Board of Governors of the Federal Reserve System), on the third Business Day preceding the date of the notice of redemption relating to such Redemption Date based upon the yield or yields for the most recent day that appear after such time on such day in the most recent statistical release published by the Board of Governors of the Federal Reserve System designated as "Selected Interest Rates (Daily)-H.15" (or any successor designation or publication) ("***H.15***") under the caption "U.S. government securities-Treasury constant maturities-Nominal" (or any successor caption or heading) ("***H.15 TCM***"). In determining the Treasury Rate, the Company shall select, as applicable: (i) the yield for the Treasury constant maturity on H.15 exactly equal to the period from the Redemption Date to the Par Call Date (the "***Remaining Life***"); or (ii) if there is no such Treasury constant maturity on H.15 exactly equal to the Remaining Life, the two yields-one yield corresponding to the Treasury constant maturity on H.15 immediately shorter than and one yield corresponding to the Treasury constant maturity on H.15 immediately longer than the Remaining Life-and shall interpolate to the Par Call Date on a straight-line basis (using the actual number of days) using such yields and rounding the result to three decimal places; or (iii) if there is no such Treasury constant maturity on H.15 shorter than or longer than the Remaining Life, the yield for the single Treasury constant maturity on H.15 closest to the Remaining Life. For purposes of this paragraph, the applicable Treasury constant maturity or maturities on H.15 shall be deemed to have a maturity date equal to the relevant number of months or years, as applicable, of such Treasury constant maturity from the Redemption Date.

If on the third Business Day preceding the date of the notice of redemption relating to such Redemption Date H.15 TCM is no longer published, the Company shall calculate the Treasury Rate based on the rate per annum equal to the semi-annual equivalent yield to maturity at 11:00 a.m., New York City time, on the second Business Day preceding the date of such notice of redemption of the United States Treasury security maturing on, or with a maturity that is closest

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to, the Par Call Date, as applicable. If there is no United States Treasury security maturing on the Par Call Date but there are two or more United States Treasury securities with a maturity date equally distant from the Par Call Date, one with a maturity date preceding the Par Call Date and one with a maturity date following the Par Call Date, the Company shall select the United States Treasury security with a maturity date preceding the Par Call Date. If there are two or more United States Treasury securities maturing on the Par Call Date or two or more United States Treasury securities meeting the criteria of the preceding sentence, the Company shall select from among these two or more United States Treasury securities the United States Treasury security that is trading closest to par based upon the average of the bid and asked prices for such United States Treasury securities at 11:00 a.m., New York City time. In determining the Treasury Rate in accordance with the terms of this paragraph, the semi-annual yield to maturity of the applicable United States Treasury security shall be based upon the average of the bid and asked prices (expressed as a percentage of principal amount) at 11:00 a.m., New York City time, of such United States Treasury security, and rounded to three decimal places.

**SECTION 1.03. *General References***.

All references in this Supplemental Indenture to Articles and Sections, unless otherwise specified, refer to the corresponding Articles and Sections of this Supplemental Indenture; and the terms "*herein*," "*hereof*," "*hereunder*" and any other word of similar import refers to this Supplemental Indenture.

**ARTICLE 2** 

**The Series of Securities** 

**SECTION 2.01. *The Form and Title of the Securities***.

There is hereby established a new series of Securities to be issued under the Indenture and to be designated as the Company's 5.400% Notes due 2035 (the "***Notes***"). The Notes shall be substantially in the form attached as <u>Exhibit A</u> hereto, in each case with such appropriate insertions, omissions, substitutions and other variations as are required or permitted by the Indenture, and may have such letters, numbers or other marks of identification and such legends or endorsements placed thereon as the Company may deem appropriate or as may be required or appropriate to comply with any laws or with any rules made pursuant thereto or with the rules of any securities exchange or automated quotation system on which the Notes may be listed or traded, or to conform to general usage, or as may, consistently with the Indenture, be determined by the officers executing such Notes, as evidenced by their execution thereof. The Notes and any beneficial interest in the Notes shall be in minimum denominations of $2,000 and integral multiples of $1,000 in excess thereof.

The Notes shall be executed, authenticated and delivered in accordance with the provisions of, and shall in all respects be subject to, the terms, conditions and covenants of the Original Indenture as supplemented by this Supplemental Indenture (including the form of Note set forth as <u>Exhibit A</u> hereto (the terms of which are incorporated in and made a part of this Supplemental Indenture for all intents and purposes)).

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**SECTION 2.02. *Amount***.

The aggregate principal amount of the Notes which may be authenticated and delivered pursuant hereto is unlimited. The Trustee shall initially authenticate and deliver Notes for original issue in an initial aggregate principal amount of up to $1,000,000,000 upon delivery to the Trustee of a Company Order for the authentication and delivery of such Notes. The aggregate principal amount of the Notes to be issued hereunder may be increased at any time hereafter and the series may be reopened for issuances of additional Notes upon Company Order without the consent of any Holder. The Notes issued on the date hereof and any such additional Notes that may be issued hereafter shall be part of the same series of Securities for all purposes under the Indenture.

**SECTION 2.03. *Stated Maturity***.

The Notes may be issued on any Business Day on or after August 12, 2025, and the Stated Maturity of the Notes shall be October 15, 2035.

**SECTION 2.04. *Interest and Interest Rates***.

The rate or rates at which the Notes shall bear interest, the date or dates from which such interest shall accrue, the interest payment dates on which any such interest shall be payable and the regular record date for any interest payable on any interest payment date, in each case, shall be as set forth in the form of Note set forth as <u>Exhibit A</u> hereto.

**SECTION 2.05. *Optional Redemption***.

At its option, the Company may redeem the Notes, in whole or in part, in principal amounts of $2,000 and in integral multiples of $1,000 in excess thereof, at any time or from time to time, at the applicable Redemption Price determined as set forth in the form of Note attached hereto as <u>Exhibit A</u>, in accordance with the terms set forth in the Notes and in accordance with Article Eleven of the Original Indenture. No notes of a principal amount of $1,000 or less will be redeemed in part.

**SECTION 2.06. *Global Securities***.

The Notes shall initially be issuable in whole or in part in the form of one or more Global Securities. Such Global Securities (i) shall be deposited with, or on behalf of, The Depository Trust Company, which shall act as Depositary with respect to the Notes, (ii) shall bear the legends applicable to Global Securities set forth in Section 204 of the Original Indenture, (iii) may be exchanged in whole or in part for Notes in definitive form upon the terms and subject to the conditions provided in Section 304 of the Original Indenture and in this Supplemental Indenture and (iv) shall otherwise be subject to the applicable provisions of the Indenture.

**ARTICLE 3** 

**Agreement to Guarantee** 

**SECTION 3.01. *Unconditional Guarantee***.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(a) For value received, subject to <u>Section</u> <u>3.04</u> hereof, each of the Guarantors hereby fully, irrevocably, unconditionally and absolutely guarantees to the Holders of the Notes and to the Trustee the due and punctual payment of the principal of, and premium, if any, and

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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 (including, without limitation, all costs and expenses (including reasonable legal fees and disbursements of its agents and counsel) incurred by the Trustee or such Holders in connection with the enforcement of the Indenture and the Guarantees) (collectively, the "***Indenture Obligations***"), when and as such amounts shall become due and payable, whether at the Stated Maturity, upon redemption or by declaration of acceleration or otherwise, according to the terms of such Notes and the Indenture. The guarantees by the Guarantors set forth in this <u>Article 3</u> are referred to herein as the "***Guarantees.***" Without limiting the generality of the foregoing, each Guarantor's liability shall extend to all amounts that constitute part of the Indenture Obligations and would be owed by the Company to the Trustee or such Holders under the Indenture and such Notes but for the fact that they are unenforceable, reduced, limited, impaired, suspended or not allowable due to the existence of a bankruptcy, reorganization or similar proceeding involving the Company.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(b) Failing payment when due of any amount guaranteed pursuant to the Guarantees, for whatever reason, each Guarantor will be obligated (to the fullest extent permitted by applicable law) to pay the same immediately to the Trustee, without set-off or counterclaim or other reduction whatsoever (whether for taxes, withholding or otherwise). The Guarantees hereunder are intended to be a general, unsecured, senior obligation of each Guarantor and will rank *pari passu* in right of payment with all unsecured indebtedness of such Guarantor that is not, by its terms, expressly subordinated in right of payment to the Guarantees of such Guarantor. Each Guarantor hereby agrees that, to the fullest extent permitted by applicable law, subject to <u>Section</u> <u>3.04</u> hereof, its obligations hereunder shall be full, irrevocable, unconditional and absolute, irrespective of the validity, regularity or enforceability of such Notes, the Guarantees or the Indenture, the absence of any action to enforce the same, any waiver or consent by any such Holder with respect to any provisions hereof or thereof, the recovery of any judgment against the Company, any action to enforce the same or any other circumstance which might otherwise constitute a legal or equitable discharge or defense of such Guarantor. Each Guarantor hereby agrees that in the event of a default in payment of any Indenture Obligations, whether at the Stated Maturity, upon redemption or by declaration of acceleration or otherwise, legal proceedings may be instituted by the Trustee on behalf of such Holders or, subject to Section 507 of the Indenture, by such Holders, on the terms and conditions set forth in the Indenture, directly against such Guarantor to enforce the Guarantees without first proceeding against the Company.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(c) To the fullest extent permitted by applicable law, subject to <u>Section</u> <u>3.04</u> hereof, the obligations of each Guarantor under this <u>Article 3</u> shall be as aforesaid full, irrevocable, unconditional and absolute and shall not be impaired, modified, discharged, released or limited by any occurrence or condition whatsoever, including, without limitation, (i) any compromise, settlement, release, waiver, renewal, extension, indulgence or modification of, or any change in, any of the obligations and liabilities of the Company or each Guarantor contained in any of such Notes or the Indenture, (ii) any impairment, modification, release or limitation of the liability of the Company, each Guarantor or any of their estates in bankruptcy, or any remedy for the enforcement thereof, resulting from the operation of any present or future provision of any applicable Bankruptcy Law, as amended, or other statute or from the decision of any court, (iii) the assertion or exercise by the Trustee or any such Holder of any rights or remedies under any of such Notes or the Indenture or their delay in or failure to assert or exercise any such rights or remedies, (iv) the assignment or the purported assignment of any property as security for any of

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such Notes, including all or any part of the rights of the Company or each Guarantor under the Indenture, (v) the extension of the time for payment by the Company or each Guarantor of any payments or other sums or any part thereof owing or payable under any of the terms and provisions of any of such Notes or the Indenture or of the time for performance by the Company or each Guarantor of any other obligations under or arising out of any such terms and provisions or the extension or the renewal of any thereof, (vi) the modification or amendment (whether material or otherwise) of any duty, agreement or obligation of the Company or each Guarantor set forth in the Indenture, (vii) the voluntary or involuntary liquidation, dissolution, sale or other disposition of all or substantially all of the assets, marshaling of assets and liabilities, receivership, insolvency, bankruptcy, assignment for the benefit of creditors, reorganization, arrangement, composition or readjustment, rehabilitation or relief of, or other similar proceeding affecting, the Company or each Guarantor or any of their respective assets, or the disaffirmance of any of such Notes, the Guarantees or the Indenture in any such proceeding, (viii) the release or discharge of the Company or each Guarantor from the performance or observance of any agreement, covenant, term or condition contained in any of such instruments by operation of law, (ix) the unenforceability of any of such Notes, the Guarantees or the Indenture, (x) any change in the name, business, capital structure, corporate existence, or ownership of the Company or each Guarantor, or (xi) any other circumstance which might otherwise constitute a defense available to, or a legal or equitable discharge of, a surety or each Guarantor.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(d) To the fullest extent permitted by applicable law, each Guarantor hereby (i) waives diligence, presentment, demand of payment, notice of acceptance, filing of claims with a court in the event of the merger, insolvency or bankruptcy of the Company or such Guarantor, and all demands and notices whatsoever, (ii) acknowledges that any agreement, instrument or document evidencing the Guarantees may be transferred and that the benefit of its obligations hereunder shall extend to each holder of any agreement, instrument or document evidencing the Guarantees without notice to them and (iii) covenants that its Guarantees will not be discharged except by complete performance of the Guarantees. To the fullest extent permitted by applicable law, each Guarantor further agrees that if at any time all or any part of any payment theretofore applied by any Person to any Guarantees is, or must be, rescinded or returned for any reason whatsoever, including without limitation, the insolvency, bankruptcy or reorganization of each Guarantor, such Guarantees shall, to the extent that such payment is or must be rescinded or returned, be deemed to have continued in existence notwithstanding such application, and the Guarantees shall continue to be effective or be reinstated, as the case may be, as though such application had not been made.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(e) Each Guarantor shall be subrogated to all rights of the Holders and the Trustee against the Company in respect of any amounts paid by such Guarantor pursuant to the provisions of the Indenture; *provided*, *however*, that such Guarantor shall not be entitled to enforce or to receive any payments arising out of, or based upon, such right of subrogation with respect to any of such Notes until all of such Notes and the Guarantees shall have been indefeasibly paid in full or discharged.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(f) To the fullest extent permitted by applicable law, no failure to exercise and no delay in exercising, on the part of the Trustee or the Holders, any right, power, privilege or remedy under this <u>Article 3</u> and the Guarantees shall operate as a waiver thereof, nor shall any single or partial exercise of any rights, power, privilege or remedy preclude any other or further

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exercise thereof, or the exercise of any other rights, powers, privileges or remedies. The rights and remedies herein provided for are cumulative and not exclusive of any rights or remedies provided in law or equity. Nothing contained in this <u>Article 3</u> shall limit the right of the Trustee or the Holders to take any action to accelerate the maturity of such Notes pursuant to Article Five of the Indenture or to pursue any rights or remedies under the Indenture or under applicable law.

**SECTION 3.02. *Limitation on Guarantor Liability***.

Each Guarantor and the Trustee hereby confirms that it is the intention of all such parties that the Guarantees of such Guarantor not constitute a fraudulent transfer or conveyance for purposes of Bankruptcy Law, the Uniform Fraudulent Conveyance Act, the Uniform Fraudulent Transfer Act or any similar federal or state law to the extent applicable to any Guarantees. To effectuate the foregoing intention, the Trustee and the Guarantors hereby irrevocably agree that the obligations of such Guarantor will be limited to the maximum amount that will, after giving effect to such maximum amount and all other contingent and fixed liabilities of such Guarantor that are relevant under such laws, and after giving effect to any collections from, rights to receive contribution from or payments made by or on behalf of the other Guarantor in respect of the obligations of such other Guarantor under this <u>Article 3</u>, result in the obligations of such Guarantor under its Guarantees not constituting a fraudulent transfer or conveyance.

**SECTION 3.03. *No Requirement to Endorse Notation of Guarantee***.

Each Guarantor hereby agrees that its execution and delivery of this Supplemental Indenture and the provisions set forth in this <u>Article 3</u> shall evidence its Guarantee without the need for notation on any Notes.

**SECTION 3.04. *Release of Guarantee***.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(a) Notwithstanding anything to the contrary in this <u>Article 3</u>, if a Guarantor (i) shall cease to be a subsidiary of the Company or (ii) shall no longer be (a) an obligor on, or issuer of, any capital markets debt securities or (b) a guarantor of any capital markets debt securities issued by the Company or the other Guarantor, in each case other than the Notes, then, if no Default or Event of Default shall have occurred and be continuing, such Guarantor, upon giving written notice to the Trustee to the foregoing effect, shall be deemed to be released from all of its obligations under the Indenture, and the Guarantees shall be of no further force or effect with respect to such Guarantor. Following the receipt by the Trustee of any such notice, the Company shall cause the Indenture to be amended as provided in Section 901 of the Indenture; *provided*, *however*, that the failure to so amend the Indenture shall not affect the validity of the termination of the Guarantees with respect to such Guarantor.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(b) In addition, upon (i) the exercise of the legal defeasance or covenant defeasance option or the satisfaction and discharge of the Indenture as provided in Articles Fifteen and Four, respectively, of the Indenture with respect to a series of Notes or (ii) a series of Notes ceasing to be Outstanding, each of the Guarantors shall be deemed to be released from all its obligations under the Indenture with respect to such series of Notes and the Guarantees of such series of Notes shall be of no further force or effect.

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**SECTION 3.05. *Benefits Acknowledged***.

Each Guarantor acknowledges that it shall receive direct and indirect benefits from the financing arrangements contemplated by the Indenture and from the Guarantees under this Supplemental Indenture.

**ARTICLE 4** 

**EVENTS OF DEFAULT** 

**SECTION 4.01. *EVENTS OF DEFAULT***.

Section 501 of the Original Indenture is replaced with respect to the Notes in its entirety by the following:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(a) "Event of Default", wherever used herein with respect to Securities of any series, means any one of the following events:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(i) default in the payment of any installment of interest upon any Security of such series when it becomes due and payable, continued for 30 days; or

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(ii) default in the payment of the principal of (or premium, if any, on) any Security of such series at its Maturity; or

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(iii) failure on the part of the Company to observe or perform any other covenant or agreement contained in this for 60 days after written notice of such failure, requiring the Company to remedy the same, has been given to the Company by the Trustee or to the Company and the Trustee by the Holders of at least 25% in aggregate principal amount of outstanding Securities of such series; or

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(iv) the entry of a decree or order by court having jurisdiction in the premises adjudging the Company a bankrupt or insolvent, or approving as properly filed a petition seeking reorganization, arrangement, adjustment or composition of or in respect of the Company under the Bankruptcy Code or any other applicable federal or state law, or appointing a receiver, liquidator, assignee, trustee, sequestrator (or other similar official) of the Company or of any substantial part of the property of the Company, or ordering the winding up or liquidation of the affairs of the Company, and the continuance of any such decree or order unstayed and in effect for a period of 90 consecutive days; or

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(v) the institution by the Company of proceedings to be adjudicated a bankrupt or insolvent, or the consent by the Company to the institution of bankruptcy or insolvency proceedings against it, or the filing by the Company of a petition or answer or consent seeking reorganization or relief under the Bankruptcy Code or any other applicable federal or state law, or the consent by the Company to the filing of any such petition or to the appointment of a receiver, liquidator, assignee, trustee, sequestrator (or other similar official) of the Company or of any substantial part of the property of the Company of an assignment for the benefit of creditors, or the admission by the Company in writing of its inability to pay its debts generally as they become due.

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**ARTICLE 5** 

**Miscellaneous** 

**SECTION 5.01. *Notices***.

Notices to the Guarantors shall be made in accordance with Section 105 of the Indenture at the address for the Company set forth in such Section.

Notices to the Trustee shall be made in accordance with Section 105 of the Indenture at the Corporate Trust Office, currently located at 2 Concourse Parkway, Suite 800, Atlanta, Georgia 30328 Attention: Corporate Trust Department.

**SECTION 5.02. *No Recourse Against Others***.

No director, officer, employee, partner (including, for greater certainty, any general partner of any general partnership who is an individual person), incorporator, manager, stockholder or member of each Guarantor, as such, will have any liability for any obligations of the Company, such Guarantor or the other Guarantor under the Notes or the Indenture or for any claim based on, in respect of, or by reason of, such obligations or their creation. The waiver and release are part of the consideration for the issuance of the Guarantees and the Notes.

**SECTION 5.03. *Certain Trustee Matters***.

The recitals contained herein and in the Notes, except for the Trustee's Certificate of Authentication, shall be taken as the statements of the Company and the Guarantors, and the Trustee assumes no responsibility for their correctness.

The Trustee makes no representations as to the validity or sufficiency of this Supplemental Indenture or the Notes or the proper authorization or the due execution hereof or thereof by the Company or any of the Guarantors.

Except as expressly set forth herein, nothing in this Supplemental Indenture shall alter the duties, rights, privileges, immunities or obligations of the Trustee set forth in the Original Indenture, which shall be applicable in respect of the Notes and of this Supplemental Indenture as fully and with like effect as if set forth herein in full.

The Trustee makes no representation or warranty as to the validity or sufficiency of the information contained in the prospectus supplement or other disclosure materials related to the Notes, except such information which specifically pertains to the Trustee itself, or any information incorporated therein by reference with respect to the Trustee.

**SECTION 5.04. *Continued Effect***.

Except as expressly supplemented and amended by this Supplemental Indenture, the Original Indenture shall continue in full force and effect in accordance with the provisions thereof, and the Original Indenture (as supplemented and amended by this Supplemental Indenture) is in all respects hereby ratified and confirmed. This Supplemental Indenture and all its provisions shall be deemed a part of the Original Indenture in the manner and to the extent herein and therein provided.

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**SECTION 5.05. *Governing Law***.

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

**SECTION 5.06. *Counterparts***.

This instrument may be executed in any number of counterparts, each of which, when delivered, shall be deemed to be an original, but all such counterparts shall together constitute but one and the same instrument.

**(Signature Pages Follow)** 

------

IN WITNESS WHEREOF, the parties hereto have caused this Supplemental Indenture to be duly executed and delivered, all as of the day and year first above written.

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| | |
|:---|:---|
| **ONEOK, INC.** | **ONEOK, INC.** |
| By: | /s/ Pierce H. Norton II |
| Name: | Pierce H. Norton II |
| Title: | President and Chief Executive Officer |

---

---

| | |
|:---|:---|
| **ONEOK PARTNERS, L.P.** | **ONEOK PARTNERS, L.P.** |
| By: | ONEOK Partners GP, L.L.C., |
|  | its General Partner |
| By: | /s/ Walter S. Hulse III |
| Name: | Walter S. Hulse III |
| Title: | Chief Financial Officer, Treasurer and Executive Vice President, Investor Relations and Corporate Development |

---

---

| | |
|:---|:---|
| **ONEOK PARTNERS INTERMEDIATE LIMITED PARTNERSHIP** | **ONEOK PARTNERS INTERMEDIATE LIMITED PARTNERSHIP** |
| By: | ONEOK ILP GP, L.L.C., |
|  | its General Partner |
| By: | /s/ Walter S. Hulse III |
| Name: | Walter S. Hulse III |
| Title: | Chief Financial Officer, Treasurer and Executive Vice President, Investor Relations and Corporate Development |

---

---

| | |
|:---|:---|
| **MAGELLAN MIDSTREAM PARTNERS, L.P.** | **MAGELLAN MIDSTREAM PARTNERS, L.P.** |
| By: | Magellan GP, LLC, |
|  | its General Partner |
| By: | /s/ Walter S. Hulse III |
| Name: | Walter S. Hulse III |
| Title: | Chief Financial Officer, Treasurer and Executive Vice President, Investor Relations and Corporate Development |

---

*[Signature Page to Thirty-Fourth Supplemental Indenture]* 

------

---

| | |
|:---|:---|
| **ENLINK MIDSTREAM PARTNERS, LP** | **ENLINK MIDSTREAM PARTNERS, LP** |
| By: | EnLink Midstream GP, LLC, |
|  | its General Partner |
| By: | /s/ Walter S. Hulse III |
| Name: | Walter S. Hulse III |
| Title: | Chief Financial Officer, Treasurer and Executive Vice President, Investor Relations and Corporate Development |

---

---

| | |
|:---|:---|
| **ELK MERGER SUB II, L.L.C.** | **ELK MERGER SUB II, L.L.C.** |
| By: | /s/ Walter S. Hulse III |
| Name: | Walter S. Hulse III |
| Title: | Chief Financial Officer, Treasurer and Executive Vice President, Investor Relations and Corporate Development |

---

*[Signature Page to Thirty-Fourth Supplemental Indenture]* 

------

---

| | |
|:---|:---|
| **U.S. BANK TRUST COMPANY, NATIONAL ASSOCIATION,** as Trustee | **U.S. BANK TRUST COMPANY, NATIONAL ASSOCIATION,** as Trustee |
| By: | /s/ Gregory M. Jackson |
| Name: | Gregory M. Jackson |
| Title: | Vice President |

---

*[Signature Page to Thirty-Fourth Supplemental Indenture]* 

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**EXHIBIT A** 

**[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** 

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| | |
|:---|:---|
| 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

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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: ,<u> </u>

---

| |
|:---|
| 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: _________________, ______

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| | |
|:---|:---|
| U.S. BANK TRUST COMPANY, NATIONAL ASSOCIATION, as Trustee | U.S. BANK TRUST COMPANY, NATIONAL ASSOCIATION, as Trustee |
| By: |  |
|  | *Authorized Signatory* |

---

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

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**[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:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(1) (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

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(2) 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.

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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.

[I*f 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:

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| | |
|:---|:---|
| Dated: | |
|  | (Signature) |
| Signature Guarantee: | |
| | (Participant in a Recognized Signature Guaranty Medallion<br>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.]

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[*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<br>Exchange** | **Amount of<br>Decrease in<br>Principal<br>Amount of this<br>Global Security** | **Amount of<br>Increase in<br>Principal<br>Amount of this<br>Global Security** | **Principal<br>Amount of this<br>Global Security<br>following such<br>decrease (or<br>increase)** | **Signature of<br>authorized<br>officer of<br>Trustee or<br>Depositary]** |

---

## Exhibit 4.4

**Exhibit 4.4** 

***Execution Version*** 

**ONEOK, INC.** 

**as Issuer;** 

**ONEOK PARTNERS, L.P.** 

**ONEOK PARTNERS INTERMEDIATE LIMITED PARTNERSHIP,** 

**MAGELLAN MIDSTREAM PARTNERS, L.P.,** 

**ENLINK MIDSTREAM PARTNERS, LP,** 

**and** 

**ELK MERGER SUB II, L.L.C.** 

**as Guarantors; and** 

**U.S. BANK TRUST COMPANY, NATIONAL ASSOCIATION** 

**as Trustee** 

**THIRTY-FIFTH SUPPLEMENTAL INDENTURE** 

**Dated as of August 12, 2025** 

**to** 

**INDENTURE** 

**relating to Securities Dated as of January 26, 2012** 

**6.250% Notes due 2055** 

------

**TABLE OF CONTENTS** 

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| | | |
|:---|:---|:---|
|  |  | Page |
| ARTICLE 1 Relation to Indenture; Definitions and Other Provisions of General Application | ARTICLE 1 Relation to Indenture; Definitions and Other Provisions of General Application | 1 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; SECTION 1.01. | Relation to Indenture | 1 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; SECTION 1.02. | Definitions | 2 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; SECTION 1.03. | General References | 3 |
| ARTICLE 2 The Series of Securities | ARTICLE 2 The Series of Securities | 3 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; SECTION 2.01. | The Form and Title of the Securities | 3 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; SECTION 2.02. | Amount | 4 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; SECTION 2.03. | Stated Maturity | 4 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; SECTION 2.04. | Interest and Interest Rates | 4 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; SECTION 2.05. | Optional Redemption | 4 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; SECTION 2.06. | Global Securities | 4 |
| ARTICLE 3 Agreement to Guarantee | ARTICLE 3 Agreement to Guarantee | 5 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; SECTION 3.01. | Unconditional Guarantee | 5 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; SECTION 3.02. | Limitation on Guarantor Liability | 7 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; SECTION 3.03. | No Requirement to Endorse Notation of Guarantee | 7 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; SECTION 3.04. | Release of Guarantee | 7 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; SECTION 3.05. | Benefits Acknowledged | 8 |
| ARTICLE 4 EVENTS OF DEFAULT | ARTICLE 4 EVENTS OF DEFAULT | 8 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; SECTION 4.01. | EVENTS OF DEFAULT | 8 |
| ARTICLE 5 Miscellaneous | ARTICLE 5 Miscellaneous | 9 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; SECTION 5.01. | Notices | 9 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; SECTION 5.02. | No Recourse Against Others | 9 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; SECTION 5.03. | Certain Trustee Matters | 9 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; SECTION 5.04. | Continued Effect | 9 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; SECTION 5.05. | Governing Law | 10 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; SECTION 5.06. | Counterparts | 10 |

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<u>EXHIBITS</u> 

Exhibit A: Form of Note

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**THIRTY-FIFTH SUPPLEMENTAL INDENTURE,** dated as of August 12, 2025 (this "***Supplemental Indenture***"), among ONEOK, INC., an Oklahoma corporation (the "***Company***"), **ONEOK PARTNERS, L.P.,** a Delaware limited partnership ("***ONEOK Partners***"), **ONEOK PARTNERS INTERMEDIATE LIMITED PARTNERSHIP,** a Delaware limited partnership (the "***Intermediate Partnership***"), **MAGELLAN MIDSTREAM PARTNERS, L.P.**, a Delaware limited partnership ("***Magellan***"), **ENLINK MIDSTREAM PARTNERS, LP**, a Delaware limited partnership ("***ENLK***"), **ELK MERGER SUB II, L.L.C.**, a Delaware limited liability company ("***Merger Sub II***" and, together with ONEOK Partners, the Intermediate Partnership, Magellan and ENLK, the "***Guarantors***"), and **U.S. BANK TRUST COMPANY, NATIONAL ASSOCIATION** (successor in interest to U.S. Bank National Association), as trustee under the Indenture referred to below (in such capacity, the "***Trustee***").

**RECITALS OF THE COMPANY** 

WHEREAS, the Company and the Trustee have heretofore entered into an Indenture, dated as of January 26, 2012 (the "***Original Indenture***") (the Original Indenture, as amended and supplemented from time to time, including without limitation pursuant to this Supplemental Indenture, being referred to herein as the "***Indenture***"); and

WHEREAS, under the Original Indenture, a new series of Securities may at any time be established by the Board of Directors of the Company, in accordance with the provisions of the Original Indenture, and the terms of such series may be established by an indenture supplemental to the Original Indenture; and

WHEREAS, the Company proposes to create under the Indenture a new series of Securities; and

WHEREAS, in connection with the issuance of the Notes (as herein defined), each of the Guarantors desires to become a guarantor of, and provide a guarantee of, the Notes; and

WHEREAS, all acts and things necessary to make the Notes and Guarantees (as herein defined), when executed by the Company and the Guarantors, respectively, and when the Notes are authenticated and delivered by the Trustee as provided in the Original Indenture and this Supplemental Indenture, the valid and binding obligations of the Company and the Guarantors, and to make this Supplemental Indenture a valid and binding agreement in accordance with the Original Indenture have been done or performed.

**ARTICLE 1** 

**Relation to Indenture; Definitions and** 

**Other Provisions of General Application** 

**SECTION 1.01. *Relation to Indenture***.

NOW, THEREFORE, in consideration of the premises, agreements and obligations set forth herein and for other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the parties hereto hereby agree, for the equal and proportionate benefit of all Holders of the Notes, as follows:

With respect to the Notes, this Supplemental Indenture constitutes an integral part of the Indenture.

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**SECTION 1.02. *Definitions***.

Except as may be provided in a future indenture supplemental to the Original Indenture, for the benefit of the Holders of the Notes but no other series of Securities under the Indenture, whether now or hereafter issued and Outstanding, Article One of the Original Indenture shall be amended by adding the following defined terms to Section 101 in appropriate alphabetical sequence. For all purposes of this Supplemental Indenture, capitalized terms used herein and not otherwise defined herein shall have the meanings assigned thereto in the Original Indenture.

"***Par Call Date***" means April 15, 2055 (six months prior to the maturity date of the Notes).

"***Treasury Rate***" means, with respect to any Redemption Date, the yield determined by the Company in accordance with the following two paragraphs.

The Treasury Rate shall be determined by the Company after 4:15 p.m., New York City time (or after such time as yields on U.S. government securities are posted daily by the Board of Governors of the Federal Reserve System), on the third Business Day preceding the date of the notice of redemption relating to such Redemption Date based upon the yield or yields for the most recent day that appear after such time on such day in the most recent statistical release published by the Board of Governors of the Federal Reserve System designated as "Selected Interest Rates (Daily)-H.15" (or any successor designation or publication) ("***H.15***") under the caption "U.S. government securities-Treasury constant maturities-Nominal" (or any successor caption or heading) ("***H.15 TCM***"). In determining the Treasury Rate, the Company shall select, as applicable: (i) the yield for the Treasury constant maturity on H.15 exactly equal to the period from the Redemption Date to the Par Call Date (the "***Remaining Life***"); or (ii) if there is no such Treasury constant maturity on H.15 exactly equal to the Remaining Life, the two yields-one yield corresponding to the Treasury constant maturity on H.15 immediately shorter than and one yield corresponding to the Treasury constant maturity on H.15 immediately longer than the Remaining Life-and shall interpolate to the Par Call Date on a straight-line basis (using the actual number of days) using such yields and rounding the result to three decimal places; or (iii) if there is no such Treasury constant maturity on H.15 shorter than or longer than the Remaining Life, the yield for the single Treasury constant maturity on H.15 closest to the Remaining Life. For purposes of this paragraph, the applicable Treasury constant maturity or maturities on H.15 shall be deemed to have a maturity date equal to the relevant number of months or years, as applicable, of such Treasury constant maturity from the Redemption Date.

If on the third Business Day preceding the date of the notice of redemption relating to such Redemption Date H.15 TCM is no longer published, the Company shall calculate the Treasury Rate based on the rate per annum equal to the semi-annual equivalent yield to maturity at 11:00 a.m., New York City time, on the second Business Day preceding the date of such notice of redemption of the United States Treasury security maturing on, or with a maturity that is closest

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to, the Par Call Date, as applicable. If there is no United States Treasury security maturing on the Par Call Date but there are two or more United States Treasury securities with a maturity date equally distant from the Par Call Date, one with a maturity date preceding the Par Call Date and one with a maturity date following the Par Call Date, the Company shall select the United States Treasury security with a maturity date preceding the Par Call Date. If there are two or more United States Treasury securities maturing on the Par Call Date or two or more United States Treasury securities meeting the criteria of the preceding sentence, the Company shall select from among these two or more United States Treasury securities the United States Treasury security that is trading closest to par based upon the average of the bid and asked prices for such United States Treasury securities at 11:00 a.m., New York City time. In determining the Treasury Rate in accordance with the terms of this paragraph, the semi-annual yield to maturity of the applicable United States Treasury security shall be based upon the average of the bid and asked prices (expressed as a percentage of principal amount) at 11:00 a.m., New York City time, of such United States Treasury security, and rounded to three decimal places.

**SECTION 1.03. *General References***.

All references in this Supplemental Indenture to Articles and Sections, unless otherwise specified, refer to the corresponding Articles and Sections of this Supplemental Indenture; and the terms "*herein*," "*hereof*," "*hereunder*" and any other word of similar import refers to this Supplemental Indenture.

**ARTICLE 2** 

**The Series of Securities** 

**SECTION 2.01. *The Form and Title of the Securities***.

There is hereby established a new series of Securities to be issued under the Indenture and to be designated as the Company's 6.250% Notes due 2055 (the "***Notes***"). The Notes shall be substantially in the form attached as <u>Exhibit A</u> hereto, in each case with such appropriate insertions, omissions, substitutions and other variations as are required or permitted by the Indenture, and may have such letters, numbers or other marks of identification and such legends or endorsements placed thereon as the Company may deem appropriate or as may be required or appropriate to comply with any laws or with any rules made pursuant thereto or with the rules of any securities exchange or automated quotation system on which the Notes may be listed or traded, or to conform to general usage, or as may, consistently with the Indenture, be determined by the officers executing such Notes, as evidenced by their execution thereof. The Notes and any beneficial interest in the Notes shall be in minimum denominations of $2,000 and integral multiples of $1,000 in excess thereof.

The Notes shall be executed, authenticated and delivered in accordance with the provisions of, and shall in all respects be subject to, the terms, conditions and covenants of the Original Indenture as supplemented by this Supplemental Indenture (including the form of Note set forth as <u>Exhibit A</u> hereto (the terms of which are incorporated in and made a part of this Supplemental Indenture for all intents and purposes)).

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**SECTION 2.02. *Amount***.

The aggregate principal amount of the Notes which may be authenticated and delivered pursuant hereto is unlimited. The Trustee shall initially authenticate and deliver Notes for original issue in an initial aggregate principal amount of up to $1,250,000,000 upon delivery to the Trustee of a Company Order for the authentication and delivery of such Notes. The aggregate principal amount of the Notes to be issued hereunder may be increased at any time hereafter and the series may be reopened for issuances of additional Notes upon Company Order without the consent of any Holder. The Notes issued on the date hereof and any such additional Notes that may be issued hereafter shall be part of the same series of Securities for all purposes under the Indenture.

**SECTION 2.03. *Stated Maturity***.

The Notes may be issued on any Business Day on or after August 12, 2025, and the Stated Maturity of the Notes shall be October 15, 2055.

**SECTION 2.04. *Interest and Interest Rates***.

The rate or rates at which the Notes shall bear interest, the date or dates from which such interest shall accrue, the interest payment dates on which any such interest shall be payable and the regular record date for any interest payable on any interest payment date, in each case, shall be as set forth in the form of Note set forth as <u>Exhibit A</u> hereto.

**SECTION 2.05. *Optional Redemption***.

At its option, the Company may redeem the Notes, in whole or in part, in principal amounts of $2,000 and in integral multiples of $1,000 in excess thereof, at any time or from time to time, at the applicable Redemption Price determined as set forth in the form of Note attached hereto as <u>Exhibit A</u>, in accordance with the terms set forth in the Notes and in accordance with Article Eleven of the Original Indenture. No notes of a principal amount of $1,000 or less will be redeemed in part.

**SECTION 2.06. *Global Securities***.

The Notes shall initially be issuable in whole or in part in the form of one or more Global Securities. Such Global Securities (i) shall be deposited with, or on behalf of, The Depository Trust Company, which shall act as Depositary with respect to the Notes, (ii) shall bear the legends applicable to Global Securities set forth in Section 204 of the Original Indenture, (iii) may be exchanged in whole or in part for Notes in definitive form upon the terms and subject to the conditions provided in Section 304 of the Original Indenture and in this Supplemental Indenture and (iv) shall otherwise be subject to the applicable provisions of the Indenture.

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**ARTICLE 3** 

**Agreement to Guarantee** 

**SECTION 3.01. *Unconditional Guarantee***.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(a) For value received, subject to <u>Section</u> <u>3.04</u> hereof, each of the Guarantors hereby fully, irrevocably, unconditionally and absolutely guarantees to the Holders of the Notes and to the Trustee 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 (including, without limitation, all costs and expenses (including reasonable legal fees and disbursements of its agents and counsel) incurred by the Trustee or such Holders in connection with the enforcement of the Indenture and the Guarantees) (collectively, the "***Indenture Obligations***"), when and as such amounts shall become due and payable, whether at the Stated Maturity, upon redemption or by declaration of acceleration or otherwise, according to the terms of such Notes and the Indenture. The guarantees by the Guarantors set forth in this <u>Article 3</u> are referred to herein as the "***Guarantees.***" Without limiting the generality of the foregoing, each Guarantor's liability shall extend to all amounts that constitute part of the Indenture Obligations and would be owed by the Company to the Trustee or such Holders under the Indenture and such Notes but for the fact that they are unenforceable, reduced, limited, impaired, suspended or not allowable due to the existence of a bankruptcy, reorganization or similar proceeding involving the Company.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(b) Failing payment when due of any amount guaranteed pursuant to the Guarantees, for whatever reason, each Guarantor will be obligated (to the fullest extent permitted by applicable law) to pay the same immediately to the Trustee, without set-off or counterclaim or other reduction whatsoever (whether for taxes, withholding or otherwise). The Guarantees hereunder are intended to be a general, unsecured, senior obligation of each Guarantor and will rank *pari passu* in right of payment with all unsecured indebtedness of such Guarantor that is not, by its terms, expressly subordinated in right of payment to the Guarantees of such Guarantor. Each Guarantor hereby agrees that, to the fullest extent permitted by applicable law, subject to <u>Section</u> <u>3.04</u> hereof, its obligations hereunder shall be full, irrevocable, unconditional and absolute, irrespective of the validity, regularity or enforceability of such Notes, the Guarantees or the Indenture, the absence of any action to enforce the same, any waiver or consent by any such Holder with respect to any provisions hereof or thereof, the recovery of any judgment against the Company, any action to enforce the same or any other circumstance which might otherwise constitute a legal or equitable discharge or defense of such Guarantor. Each Guarantor hereby agrees that in the event of a default in payment of any Indenture Obligations, whether at the Stated Maturity, upon redemption or by declaration of acceleration or otherwise, legal proceedings may be instituted by the Trustee on behalf of such Holders or, subject to Section 507 of the Indenture, by such Holders, on the terms and conditions set forth in the Indenture, directly against such Guarantor to enforce the Guarantees without first proceeding against the Company.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(c) To the fullest extent permitted by applicable law, subject to <u>Section</u> <u>3.04</u> hereof, the obligations of each Guarantor under this <u>Article 3</u> shall be as aforesaid full, irrevocable, unconditional and absolute and shall not be impaired, modified, discharged, released or limited by any occurrence or condition whatsoever, including, without limitation, (i) any compromise, settlement, release, waiver, renewal, extension, indulgence or modification of, or any change in, any of the obligations and liabilities of the Company or each Guarantor contained in any of such Notes or the Indenture, (ii) any impairment, modification, release or limitation of the liability of the Company, each Guarantor or any of their estates in bankruptcy, or any remedy for the enforcement thereof, resulting from the operation of any present or future provision of any applicable Bankruptcy Law, as amended, or other statute or from the decision of any court, (iii) the assertion or exercise by the Trustee or any such Holder of any rights or remedies under any of such Notes or the Indenture or their delay in or failure to assert or exercise any such rights or remedies, (iv) the assignment or the purported assignment of any property as security for any of

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such Notes, including all or any part of the rights of the Company or each Guarantor under the Indenture, (v) the extension of the time for payment by the Company or each Guarantor of any payments or other sums or any part thereof owing or payable under any of the terms and provisions of any of such Notes or the Indenture or of the time for performance by the Company or each Guarantor of any other obligations under or arising out of any such terms and provisions or the extension or the renewal of any thereof, (vi) the modification or amendment (whether material or otherwise) of any duty, agreement or obligation of the Company or each Guarantor set forth in the Indenture, (vii) the voluntary or involuntary liquidation, dissolution, sale or other disposition of all or substantially all of the assets, marshaling of assets and liabilities, receivership, insolvency, bankruptcy, assignment for the benefit of creditors, reorganization, arrangement, composition or readjustment, rehabilitation or relief of, or other similar proceeding affecting, the Company or each Guarantor or any of their respective assets, or the disaffirmance of any of such Notes, the Guarantees or the Indenture in any such proceeding, (viii) the release or discharge of the Company or each Guarantor from the performance or observance of any agreement, covenant, term or condition contained in any of such instruments by operation of law, (ix) the unenforceability of any of such Notes, the Guarantees or the Indenture, (x) any change in the name, business, capital structure, corporate existence, or ownership of the Company or each Guarantor, or (xi) any other circumstance which might otherwise constitute a defense available to, or a legal or equitable discharge of, a surety or each Guarantor.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(d) To the fullest extent permitted by applicable law, each Guarantor hereby (i) waives diligence, presentment, demand of payment, notice of acceptance, filing of claims with a court in the event of the merger, insolvency or bankruptcy of the Company or such Guarantor, and all demands and notices whatsoever, (ii) acknowledges that any agreement, instrument or document evidencing the Guarantees may be transferred and that the benefit of its obligations hereunder shall extend to each holder of any agreement, instrument or document evidencing the Guarantees without notice to them and (iii) covenants that its Guarantees will not be discharged except by complete performance of the Guarantees. To the fullest extent permitted by applicable law, each Guarantor further agrees that if at any time all or any part of any payment theretofore applied by any Person to any Guarantees is, or must be, rescinded or returned for any reason whatsoever, including without limitation, the insolvency, bankruptcy or reorganization of each Guarantor, such Guarantees shall, to the extent that such payment is or must be rescinded or returned, be deemed to have continued in existence notwithstanding such application, and the Guarantees shall continue to be effective or be reinstated, as the case may be, as though such application had not been made.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(e) Each Guarantor shall be subrogated to all rights of the Holders and the Trustee against the Company in respect of any amounts paid by such Guarantor pursuant to the provisions of the Indenture; *provided*, *however*, that such Guarantor shall not be entitled to enforce or to receive any payments arising out of, or based upon, such right of subrogation with respect to any of such Notes until all of such Notes and the Guarantees shall have been indefeasibly paid in full or discharged.

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(f) To the fullest extent permitted by applicable law, no failure to exercise and no delay in exercising, on the part of the Trustee or the Holders, any right, power, privilege or remedy under this <u>Article 3</u> and the Guarantees shall operate as a waiver thereof, nor shall any single or partial exercise of any rights, power, privilege or remedy preclude any other or further exercise thereof, or the exercise of any other rights, powers, privileges or remedies. The rights and remedies herein provided for are cumulative and not exclusive of any rights or remedies provided in law or equity. Nothing contained in this <u>Article 3</u> shall limit the right of the Trustee or the Holders to take any action to accelerate the maturity of such Notes pursuant to Article Five of the Indenture or to pursue any rights or remedies under the Indenture or under applicable law.

**SECTION 3.02. *Limitation on Guarantor Liability***.

Each Guarantor and the Trustee hereby confirms that it is the intention of all such parties that the Guarantees of such Guarantor not constitute a fraudulent transfer or conveyance for purposes of Bankruptcy Law, the Uniform Fraudulent Conveyance Act, the Uniform Fraudulent Transfer Act or any similar federal or state law to the extent applicable to any Guarantees. To effectuate the foregoing intention, the Trustee and the Guarantors hereby irrevocably agree that the obligations of such Guarantor will be limited to the maximum amount that will, after giving effect to such maximum amount and all other contingent and fixed liabilities of such Guarantor that are relevant under such laws, and after giving effect to any collections from, rights to receive contribution from or payments made by or on behalf of the other Guarantor in respect of the obligations of such other Guarantor under this <u>Article 3</u>, result in the obligations of such Guarantor under its Guarantees not constituting a fraudulent transfer or conveyance.

**SECTION 3.03. *No Requirement to Endorse Notation of Guarantee***.

Each Guarantor hereby agrees that its execution and delivery of this Supplemental Indenture and the provisions set forth in this <u>Article 3</u> shall evidence its Guarantee without the need for notation on any Notes.

**SECTION 3.04. *Release of Guarantee***.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(a) Notwithstanding anything to the contrary in this <u>Article 3</u>, if a Guarantor (i) shall cease to be a subsidiary of the Company or (ii) shall no longer be (a) an obligor on, or issuer of, any capital markets debt securities or (b) a guarantor of any capital markets debt securities issued by the Company or the other Guarantor, in each case other than the Notes, then, if no Default or Event of Default shall have occurred and be continuing, such Guarantor, upon giving written notice to the Trustee to the foregoing effect, shall be deemed to be released from all of its obligations under the Indenture, and the Guarantees shall be of no further force or effect with respect to such Guarantor. Following the receipt by the Trustee of any such notice, the Company shall cause the Indenture to be amended as provided in Section 901 of the Indenture; *provided*, *however*, that the failure to so amend the Indenture shall not affect the validity of the termination of the Guarantees with respect to such Guarantor.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(b) In addition, upon (i) the exercise of the legal defeasance or covenant defeasance option or the satisfaction and discharge of the Indenture as provided in Articles Fifteen and Four, respectively, of the Indenture with respect to a series of Notes or (ii) a series of Notes ceasing to be Outstanding, each of the Guarantors shall be deemed to be released from all its obligations under the Indenture with respect to such series of Notes and the Guarantees of such series of Notes shall be of no further force or effect.

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**SECTION 3.05. *Benefits Acknowledged***.

Each Guarantor acknowledges that it shall receive direct and indirect benefits from the financing arrangements contemplated by the Indenture and from the Guarantees under this Supplemental Indenture.

**ARTICLE 4** 

**EVENTS OF DEFAULT** 

**SECTION 4.01. *EVENTS OF DEFAULT***.

Section 501 of the Original Indenture is replaced with respect to the Notes in its entirety by the following:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(a) "Event of Default", wherever used herein with respect to Securities of any series, means any one of the following events:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(i) default in the payment of any installment of interest upon any Security of such series when it becomes due and payable, continued for 30 days; or

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(ii) default in the payment of the principal of (or premium, if any, on) any Security of such series at its Maturity; or

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(iii) failure on the part of the Company to observe or perform any other covenant or agreement contained in this for 60 days after written notice of such failure, requiring the Company to remedy the same, has been given to the Company by the Trustee or to the Company and the Trustee by the Holders of at least 25% in aggregate principal amount of outstanding Securities of such series; or

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(iv) the entry of a decree or order by court having jurisdiction in the premises adjudging the Company a bankrupt or insolvent, or approving as properly filed a petition seeking reorganization, arrangement, adjustment or composition of or in respect of the Company under the Bankruptcy Code or any other applicable federal or state law, or appointing a receiver, liquidator, assignee, trustee, sequestrator (or other similar official) of the Company or of any substantial part of the property of the Company, or ordering the winding up or liquidation of the affairs of the Company, and the continuance of any such decree or order unstayed and in effect for a period of 90 consecutive days; or

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(v) the institution by the Company of proceedings to be adjudicated a bankrupt or insolvent, or the consent by the Company to the institution of bankruptcy or insolvency proceedings against it, or the filing by the Company of a petition or answer or consent seeking reorganization or relief under the Bankruptcy Code or any other applicable federal or state law, or the consent by the Company to the filing of any such petition or to the appointment of a receiver, liquidator, assignee, trustee, sequestrator (or other similar official) of the Company or of any substantial part of the property of the Company of an assignment for the benefit of creditors, or the admission by the Company in writing of its inability to pay its debts generally as they become due.

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**ARTICLE 5** 

**Miscellaneous** 

**SECTION 5.01. *Notices***.

Notices to the Guarantors shall be made in accordance with Section 105 of the Indenture at the address for the Company set forth in such Section.

Notices to the Trustee shall be made in accordance with Section 105 of the Indenture at the Corporate Trust Office, currently located at 2 Concourse Parkway, Suite 800, Atlanta, Georgia 30328 Attention: Corporate Trust Department.

**SECTION 5.02. *No Recourse Against Others***.

No director, officer, employee, partner (including, for greater certainty, any general partner of any general partnership who is an individual person), incorporator, manager, stockholder or member of each Guarantor, as such, will have any liability for any obligations of the Company, such Guarantor or the other Guarantor under the Notes or the Indenture or for any claim based on, in respect of, or by reason of, such obligations or their creation. The waiver and release are part of the consideration for the issuance of the Guarantees and the Notes.

**SECTION 5.03. *Certain Trustee Matters***.

The recitals contained herein and in the Notes, except for the Trustee's Certificate of Authentication, shall be taken as the statements of the Company and the Guarantors, and the Trustee assumes no responsibility for their correctness.

The Trustee makes no representations as to the validity or sufficiency of this Supplemental Indenture or the Notes or the proper authorization or the due execution hereof or thereof by the Company or any of the Guarantors.

Except as expressly set forth herein, nothing in this Supplemental Indenture shall alter the duties, rights, privileges, immunities or obligations of the Trustee set forth in the Original Indenture, which shall be applicable in respect of the Notes and of this Supplemental Indenture as fully and with like effect as if set forth herein in full.

The Trustee makes no representation or warranty as to the validity or sufficiency of the information contained in the prospectus supplement or other disclosure materials related to the Notes, except such information which specifically pertains to the Trustee itself, or any information incorporated therein by reference with respect to the Trustee.

**SECTION 5.04. *Continued Effect***.

Except as expressly supplemented and amended by this Supplemental Indenture, the Original Indenture shall continue in full force and effect in accordance with the provisions thereof, and the Original Indenture (as supplemented and amended by this Supplemental Indenture) is in all respects hereby ratified and confirmed. This Supplemental Indenture and all its provisions shall be deemed a part of the Original Indenture in the manner and to the extent herein and therein provided.

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**SECTION 5.05. *Governing Law***.

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

**SECTION 5.06. *Counterparts***.

This instrument may be executed in any number of counterparts, each of which, when delivered, shall be deemed to be an original, but all such counterparts shall together constitute but one and the same instrument.

**(Signature Pages Follow)** 

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IN WITNESS WHEREOF, the parties hereto have caused this Supplemental Indenture to be duly executed and delivered, all as of the day and year first above written.

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| | |
|:---|:---|
| **ONEOK, INC.** | **ONEOK, INC.** |
| By: | /s/ Pierce H. Norton II |
| Name: | Pierce H. Norton II |
| Title: | President and Chief Executive Officer |

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| | |
|:---|:---|
| **ONEOK PARTNERS, L.P.** | **ONEOK PARTNERS, L.P.** |
| By: | ONEOK Partners GP, L.L.C., |
|  | its General Partner |

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| | |
|:---|:---|
| By: | /s/ Walter S. Hulse III |
| Name: | Walter S. Hulse III |
| Title: | Chief Financial Officer, Treasurer and Executive Vice President, Investor Relations and Corporate Development |

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| | |
|:---|:---|
| **ONEOK PARTNERS INTERMEDIATE LIMITED PARTNERSHIP** | **ONEOK PARTNERS INTERMEDIATE LIMITED PARTNERSHIP** |
| By: | ONEOK ILP GP, L.L.C., |
|  | its General Partner |

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| | |
|:---|:---|
| By: | /s/ Walter S. Hulse III |
| Name: | Walter S. Hulse III |
| Title: | Chief Financial Officer, Treasurer and Executive Vice President, Investor Relations and Corporate Development |

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| | |
|:---|:---|
| **MAGELLAN MIDSTREAM PARTNERS, L.P.** | **MAGELLAN MIDSTREAM PARTNERS, L.P.** |
| By: | Magellan GP, LLC, |
|  | its General Partner |

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| | |
|:---|:---|
| By: | /s/ Walter S. Hulse III |
| Name: | Walter S. Hulse III |
| Title: | Chief Financial Officer, Treasurer and Executive Vice President, Investor Relations and Corporate Development |

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*[Signature Page to Thirty-Fifth Supplemental Indenture]* 

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| | |
|:---|:---|
| **ENLINK MIDSTREAM PARTNERS, LP** | **ENLINK MIDSTREAM PARTNERS, LP** |
| By: | EnLink Midstream GP, LLC, |
|  | its General Partner |

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| | |
|:---|:---|
| By: | /s/ Walter S. Hulse III |
| Name: | Walter S. Hulse III |
| Title: | Chief Financial Officer, Treasurer and Executive Vice President, Investor Relations and Corporate Development |

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| | |
|:---|:---|
| **ELK MERGER SUB II, L.L.C.** | **ELK MERGER SUB II, L.L.C.** |
| By: | /s/ Walter S. Hulse III |
| Name: | Walter S. Hulse III |
| Title: | Chief Financial Officer, Treasurer and Executive Vice President, Investor Relations and Corporate Development |

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*[Signature Page to Thirty-Fifth Supplemental Indenture]* 

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| | |
|:---|:---|
| **U.S. BANK TRUST COMPANY, NATIONAL ASSOCIATION,** as Trustee | **U.S. BANK TRUST COMPANY, NATIONAL ASSOCIATION,** as Trustee |
| By: | /s/ Gregory M. Jackson |
| Name: | Gregory M. Jackson |
| Title: | Vice President |

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*[Signature Page to Thirty-Fifth Supplemental Indenture]* 

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**EXHIBIT A** 

**[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.** 

**6.250% Note due 2055** 

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| | |
|:---|:---|
| No._____ | U.S. $_______ |
| CUSIP No. 682680 DD2 |  |

---

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, 2055, 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 6.250% 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

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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: <u> </u>,<u> </u>

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| |
|:---|
| ONEOK, INC. |
| By: |
| Name: |
| Title: |

---

---

| |
|:---|
| ATTEST |
| By: |
| Name: |
| Title: |

---

*[Signature Page to 2055 Global Note A-[•]]* 

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**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

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| | |
|:---|:---|
| By: |  |
|  | *Authorized Signatory* |

---

*[Signature Page to 2055 Global Note A-[•]]* 

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**[REVERSE OF NOTE]** 

**ONEOK, INC.** 

**6.250% Note due 2055** 

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-Fifth 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:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(1) (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 25 basis points less (b) interest accrued to the Redemption Date, and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(2) 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.

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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

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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.

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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.

[I*f 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:

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| | |
|:---|:---|
| Dated:<u> </u> |  |
|  | (Signature) |

---

Signature Guarantee: <br> (Participant in a Recognized Signature Guaranty<br>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.]

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[*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:

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| | | | | |
|:---|:---|:---|:---|:---|
| **Date of<br>Exchange** | **Amount of<br>Decrease in<br>Principal<br>Amount of this<br>Global Security** | **Amount of<br>Increase in<br>Principal<br>Amount of this<br>Global Security** | **Principal<br>Amount of this<br>Global Security<br>following such<br>decrease (or<br>increase)** | **Signature of<br>authorized<br>officer of<br>Trustee or<br>Depositary]** |

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## Exhibit 4.5

**Exhibit 4.5** 

**[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.** 

**4.950% Note due 2032** 

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| | |
|:---|:---|
| No._____ | U.S. $_______ |
| CUSIP No. 682680 DB6 |  |

---

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, 2032, 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 4.950% 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

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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.

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

Dated: , ___

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| |
|:---|
| ONEOK, INC. |
| By: |
| Name: |
| Title: |

---

---

| |
|:---|
| ATTEST |
| By: |
| Name: |
| Title: |

---

*[Signature Page to 2032 Global Note A-[ • ]]* 

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**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> </u>

U.S. BANK TRUST COMPANY, NATIONAL ASSOCIATION,

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| | |
|:---|:---|
| as Trustee | as Trustee |
| By: |  |
|  | *Authorized Signatory* |

---

*[Signature Page to 2032 Global Note A-[ • ]]* 

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**[REVERSE OF NOTE]** 

**ONEOK, INC.** 

**4.950% Note due 2032** 

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-Third 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:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(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.

*[Signature Page to 2032 Global Note A-[ • ]]* 

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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

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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.

[I*f 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:<u> </u> |  |
|  | (Signature) |

---

Signature Guarantee: <br> (Participant in a Recognized Signature Guaranty<br>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.]

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[*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<br>Exchange** | **Amount of<br>Decrease in<br>Principal<br>Amount of this<br>Global Security** | **Amount of<br>Increase in<br>Principal<br>Amount of this<br>Global Security** | **Principal<br>Amount of this<br>Global Security<br>following such<br>decrease (or<br>increase)** | **Signature of<br>authorized<br>officer of<br>Trustee or<br>Depositary]** |

---

## Exhibit 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: ,<u> </u>

---

| |
|:---|
| 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> </u>

U.S. BANK TRUST COMPANY, NATIONAL ASSOCIATION,

---

| | |
|:---|:---|
| as Trustee | 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:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(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.

[I*f 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:<u> </u> |  |
|  | (Signature) |

---

Signature Guarantee: <br> (Participant in a Recognized Signature Guaranty Medallion<br>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<br>Exchange** | **Amount of<br>Decrease in<br>Principal<br>Amount of this<br>Global Security** | **Amount of<br>Increase in<br>Principal<br>Amount of this<br>Global Security** | **Principal<br>Amount of this<br>Global Security<br>following such<br>decrease (or<br>increase)** | **Signature of<br>authorized<br>officer of<br>Trustee or<br>Depositary]** |

---

## Exhibit 4.7

**Exhibit 4.7** 

**[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.** 

**6.250% Note due 2055** 

---

| | |
|:---|:---|
| No._____ | U.S. $_______ |
| CUSIP No. 682680 DD2 |  |

---

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, 2055, 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 6.250% 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: ,<u> </u>

---

| |
|:---|
| ONEOK, INC. |
| By: |
| Name: |
| Title: |

---

---

| |
|:---|
| ATTEST |
| By: |
| Name: |
| Title: |

---

*[Signature Page to 2055 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> </u>

U.S. BANK TRUST COMPANY, NATIONAL ASSOCIATION,

---

| | |
|:---|:---|
| as Trustee | as Trustee |
| By: |  |
|  | *Authorized Signatory* |

---

*[Signature Page to 2055 Global Note A-[ • ]]* 

------

**[REVERSE OF NOTE]** 

**ONEOK, INC.** 

**6.250% Note due 2055** 

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-Fifth 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:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(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 25 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

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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.

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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.

[I*f 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:

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| | |
|:---|:---|
| Dated:<u> </u> |  |
|  | (Signature) |

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Signature Guarantee: <br> (Participant in a Recognized Signature Guaranty<br>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.]

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[*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:

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| | | | | |
|:---|:---|:---|:---|:---|
| **Date of<br>Exchange** | **Amount of<br>Decrease in<br>Principal<br>Amount of this<br>Global Security** | **Amount of<br>Increase in<br>Principal<br>Amount of this<br>Global Security** | **Principal<br>Amount of this<br>Global Security<br>following such<br>decrease (or<br>increase)** | **Signature of<br>authorized<br>officer of<br>Trustee or<br>Depositary]** |

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## Exhibit 5.1

**Exhibit 5.1** 

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| | | |
|:---|:---|:---|
|  | 300 Colorado Street, Suite 2400 | 300 Colorado Street, Suite 2400 |
|  | Austin, TX 78701 | Austin, TX 78701 |
|  | Tel: +1.737.910.7300 Fax: +1.737.910.7301 | Tel: +1.737.910.7300 Fax: +1.737.910.7301 |
|  | www.lw.com |  |
| ![LOGO](g17085g0812205912282.jpg) | FIRM / AFFILIATE OFFICES | FIRM / AFFILIATE OFFICES |
| ![LOGO](g17085g0812205912282.jpg) | Austin | Milan |
|  | Beijing | Munich |
|  | Boston | New York |
|  | Brussels | Orange County |
|  | Chicago | Paris |
| August 12, 2025 | Dubai | Riyadh |
|  | Düsseldorf | San Diego |
|  | Frankfurt | San Francisco |
|  | Hamburg | Seoul |
|  | Hong Kong | Silicon Valley |
|  | Houston | Singapore |
|  | London | Tel Aviv |
|  | Los Angeles | Tokyo |
|  | Madrid | Washington, D.C. |

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ONEOK, Inc.

100 West Fifth Street

Tulsa, Oklahoma 74103

Re: <u>Registration Statement No.</u> <u>333-272782</u>

To the addressee set forth above:

We have acted as special counsel to ONEOK, Inc., an Oklahoma corporation (the "***Company***"), ONEOK Partners, L.P., a Delaware limited partnership ("***ONEOK Partners***"), ONEOK Partners Intermediate Limited Partnership, a Delaware limited partnership ("***ONEOK Partners ILP***"), Magellan Midstream Partners, L.P., a Delaware limited partnership ("***Magellan***"), EnLink Midstream Partners, LP, a Delaware limited partnership (together with ONEOK Partners, ONEOK ILP and Magellan, the "***LP Guarantors***") and Elk Merger Sub II, L.L.C., a Delaware limited liability company ("***Elk Merger Sub II***" or the "***LLC Guarantor***" and, together with the LP Guarantors, the "***Guarantors***"), in connection with the issuance by the Company of $750 million aggregate principal amount of the Company's 4.950% Notes due 2032 (the "***2032 Notes***"), $1.0 billion aggregate principal amount of the Company's 5.400% Notes due 2035 (the "***2035 Notes***") and $1.25 billion aggregate principal amount of the Company's 6.250% Notes due 2055 (the "***2055 Notes***" and, together with the 2032 Notes and the 2035 Notes, the "***Notes***") and, the guarantee of the Notes (the "***Guarantee***" and, together with the Notes, the "***Securities***") by the Guarantors, under the Base Indenture dated as of January 26, 2012, as amended and supplemented (the "***Base Indenture***"), by and among the Company and U.S. Bank Trust Company, National Association (successor in interest to U.S. Bank National Association), as trustee (the "***Trustee***"), as further supplemented by that certain Thirty-Third Supplemental Indenture (the "***Thirty-Third Supplemental Indenture***"), dated as of the date hereof, by and among the Company, the Guarantors and the Trustee, that certain Thirty-Fourth Supplemental Indenture (the "***Thirty-Fourth Supplemental Indenture***"), dated as of the date hereof, by and among the Company, the Guarantors and the Trustee, and that certain Thirty-Fifth Supplemental Indenture (together with the Thirty-Third Supplemental Indenture and Thirty-Fourth Supplemental Indenture, the "***Supplemental Indentures***"), dated as of the date hereof, by and among the Company, the

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**August 12, 2025** 

 **Page 2**![LOGO](g17085g0812202204186.jpg)

Guarantors and the Trustee (the Base Indenture, as so supplemented by each of the Supplemental Indentures, the "***Indenture***"), and pursuant to a registration statement on Form S-3 under the Securities Act of 1933, as amended (the "***Act***"), filed with the Securities and Exchange Commission (the "***Commission***") on June 20, 2023 (Registration No. 333-272782) (as so filed, the "***Registration Statement***"). This opinion is being furnished in connection with the requirements of Item 601(b)(5) of Regulation S-K under the Act, and no opinion is expressed herein as to any matter pertaining to the contents of the Registration Statement or related prospectus, other than as expressly stated herein with respect to the issuance of the Securities.

As such counsel, we have examined such matters of fact and questions of law as we have considered appropriate for purposes of this letter. With your consent, we have relied upon certificates and other assurances of officers of the Company, the LLC Guarantor, the general partners of each of the LP Guarantors and others as to factual matters without having independently verified such factual matters. We are opining herein as to the internal laws of the State of New York, the Delaware Revised Uniform Limited Partnership Act and the Delaware Limited Liability Company Act, and we express no opinion with respect to the applicability thereto, or the effect thereon, of the laws of any other jurisdiction or, in the case of Delaware, any other laws, or as to any matters of municipal law or the laws of any local agencies within any state.

Subject to the foregoing and the other matters set forth herein, it is our opinion that, as of the date hereof, when the Securities have been duly executed, issued, and authenticated in accordance with the terms of the Indenture and delivered against payment therefor in the circumstances contemplated by the underwriting agreement, dated August 6, 2025, among the Company, the Guarantors and Mizuho Securities USA LLC, Deutsche Bank Securities Inc., PNC Capital Markets LLC, TD Securities (USA) LLC and Truist Securities, Inc., as representatives of the several underwriters named therein, the Securities will have been duly authorized by all necessary corporate action of the Company, limited partnership action of the LP Guarantors, and limited liability company action of the LLC Guarantor and will be legally valid and binding obligations of the Company and the Guarantors, respectively, enforceable against the Company and the Guarantors in accordance with their respective terms.

Our opinion is subject to:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(a) the effects of bankruptcy, insolvency, reorganization, preference, fraudulent transfer, moratorium or other
similar laws relating to or affecting the rights and remedies of creditors;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(b) the effects of general principles of equity, whether considered in a proceeding in equity or at law (including
the possible unavailability of specific performance or injunctive relief), concepts of materiality, reasonableness, good faith, fair dealing and the discretion of the court before which a proceeding is brought;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(c) the invalidity under certain circumstances under law or court decisions of provisions for the indemnification
of or contribution to a party with respect to a liability where such indemnification or contribution is contrary to public policy; and

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**August 12, 2025** 

 **Page 3**![LOGO](g17085g0812202204186.jpg)

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(d) we express no opinion with respect to (i) consents to, or restrictions upon, governing law, jurisdiction,
venue, service of process, arbitration, remedies or judicial relief; (ii) advance waivers of claims, defenses, rights granted by law, or notice, opportunity for hearing, evidentiary requirements, statutes of limitation, trial by jury or at law,
or other procedural rights; (iii) waivers of rights or defenses contained in Section 515 of the Base Indenture and waivers of broadly or vaguely stated rights; (iv) covenants not to compete; (v) provisions for exclusivity,
election or cumulation of rights or remedies; (vi) provisions authorizing or validating conclusive or discretionary determinations; (vii) grants of setoff rights; (viii) provisions to the effect that a guarantor is liable as a primary
obligor, and not as a surety and provisions purporting to waive modifications of any guaranteed obligation to the extent such modification constitutes a novation; (ix) provisions for the payment of attorneys' fees where such payment is
contrary to law or public policy; (x) proxies, powers and trusts; (xi) provisions prohibiting, restricting, or requiring consent to assignment or transfer of any right or property; (xii) provisions for liquidated damages, default
interest, late charges, monetary penalties, prepayment or make-whole premiums or other economic remedies to the extent such provisions are deemed to constitute a penalty; (xiii) provisions permitting, upon acceleration of any indebtedness
(including the Notes), collection of that portion of the stated principal amount thereof which might be determined to constitute unearned interest thereon; and (xiv) the severability, if invalid, of provisions to the foregoing effect.

With your consent, we have assumed (a) that the Indenture and the Securities (collectively, the "***Documents***") have been duly authorized, executed and delivered by the parties thereto other than the Guarantors, (b) that the Documents constitute legally valid and binding obligations of the parties thereto other than the Company and the Guarantors, enforceable against each of them in accordance with their respective terms, and (c) that the status of the Documents as legally valid and binding obligations of the parties is not affected by any (i) breaches of, or defaults under, agreements or instruments, (ii) violations of statutes, rules, regulations or court or governmental orders, or (iii) failures to obtain required consents, approvals or authorizations from, or make required registrations, declarations or filings with, governmental authorities.

This opinion is for your benefit in connection with the Registration Statement and may be relied upon by you and by persons entitled to rely upon it pursuant to the applicable provisions of the Act. We consent to your filing this opinion as an exhibit to the Company's Form 8-K dated August 6, 2025 and to the reference to our firm contained in the Prospectus under the heading "Legal." In giving such consent, we do not thereby admit that we are in the category of persons whose consent is required under Section 7 of the Act or the rules and regulations of the Commission thereunder.

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| |
|:---|
| Sincerely, |
| /s/ Latham & Watkins LLP |

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## Exhibit 5.2

**Exhibit 5.2** 

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| | | |
|:---|:---|:---|
|  | ![LOGO](g17085g0813205329340.jpg) |  |
| 110 North Elgin Avenue, Suite 200<br> Tulsa, Oklahoma 74120-1490<br> Telephone (918) 595-4800<br> Fax (918) 595-4990<br> *www.gablelaw.com* | BOK Park Plaza<br> 499 West Sheridan Avenue, Suite 2200<br> Oklahoma City, OK 73102<br> Telephone (405) 235-5500<br> Fax (405) 235-2875 | 1100 Louisiana, Suite 5000<br> Houston, Texas 77002<br> Telephone: (346) 200-6020 |

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August 12, 2025

ONEOK, Inc.

100 West Fifth Street

Tulsa, OK 74103

Ladies and Gentlemen:

We have acted as special Oklahoma counsel to ONEOK, Inc., an Oklahoma corporation (the "***Company***"), in connection with the Company's issuance and sale of $750,000,000 aggregate principal amount of the Company's 4.950% Notes due 2032, $1,000,000,000 aggregate principal amount of its 5.400% Notes due 2035, and $1,250,000,000 aggregate principal amount of its 6.250% Notes due 2055 (collectively, the "***Notes***"). The Notes will be fully and unconditionally guaranteed as to payment of principal, premium, if any, and interest (collectively the "***Guarantees***" and, together with the Notes, the "***Securities***") by ONEOK Partners, L.P., a Delaware limited partnership ("***ONEOK Partners***"), ONEOK Partners Intermediate Limited Partnership, a Delaware limited partnership (the "***Intermediate Partnership***"), Magellan Midstream Partners, L.P., a Delaware limited partnership ("***Magellan***"), Elk Merger Sub II, L.L.C., a Delaware limited liability company ("***Elk***"), EnLink Midstream Partners, LP, a Delaware limited partnership ("***EnLink***" and, collectively with ONEOK Partners, the Intermediate Partnership, Magellan, and Elk, the "***Guarantors***" and each individually, a "***Guarantor***").

The Securities are being issued under an Indenture, dated as of January 26, 2012, as amended and supplemented before August 12, 2025 (as so amended and supplemented, the "***Base Indenture***"), by and between the Company and U.S. Bank Trust Company, National Association (successor in interest to U.S. Bank National Association), as trustee (the "***Trustee***"), as further amended and supplemented by the Thirty-Third Supplemental Indenture, the Thirty-Fourth Supplemental Indenture, and the Thirty-Fifth Supplemental Indenture (collectively, the "***Supplemental Indentures***"), each dated as of the Closing Date and each among the Issuers and the Trustee (the Base Indenture, as amended and supplemented by the Supplemental Indentures, the "***Indenture***").

In rendering the opinions set forth herein, we have examined and relied on originals or electronic or other reproduction copies of the Indenture and the Notes. We have also examined originals or copies of such records of the Company and such agreements, certificates of public officials, certificates of officers or other representatives of the Company and others, and such other documents, certificates and records, as we have deemed necessary or appropriate as a basis for the

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| | |
|:---|:---|
| ![LOGO](g17085g0813205329513.jpg) | ONEOK, Inc.<br> August 12, 2025<br> Page 2 |

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opinions set forth herein. In our examination, we have assumed the legal capacity of all natural persons, the genuineness of all signatures, the authenticity of all documents submitted to us as originals, and the conformity to authentic original documents of all documents submitted to us as certified electronic or reproduction copies. As to any facts material to the opinions and statements expressed herein that we did not independently establish or verify, we have relied, to the extent we deem appropriate, upon (i) oral or written statements and representations of officers and other representatives of the Company and (ii) statements and certifications of public officials and others.

Based upon the foregoing and subject to the limitations, qualifications, exceptions and assumptions set forth herein, we are of the opinion that:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;1. The Company has the corporate power and authority to execute and deliver the Notes and perform its obligations thereunder.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;2. The Notes have been duly authorized by the Company.

Our opinions expressed herein are subject to the following qualifications:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(i) Our opinions are limited to the laws of the State of Oklahoma, and we do not express any opinion as to the laws of any other jurisdiction, including without limitation the federal laws of the United States.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(ii) The opinions herein are limited to the matters expressly set forth in this letter, and no opinions are implied or may be inferred beyond the matters expressly so stated.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(iii) The opinions expressed herein are as of the date hereof only and are based on laws, orders, contract terms and provisions, and facts as of such date, and we disclaim any obligation to update this opinion letter after such date or to advise you of changes of facts stated or assumed herein or any subsequent changes in law.

We consent to the filing of this opinion as an exhibit to a Current Report on Form 8-K to be incorporated by reference into the Registration Statement. In giving this consent, we do not admit that we are included in the category of persons whose consent is required under Section 7 of the Securities Act of 1933, as amended, or the rules and regulations of the Securities and Exchange Commission issued thereunder. This opinion letter may be relied upon by Latham & Watkins LLP, as if it were addressed to it, for the sole purpose of rendering its opinions in connection with the offer and sale of the Securities.

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| |
|:---|
| Yours very truly, |
| /s/ GableGotwals |

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