Exhibit 4.6

NUSTAR LOGISTICS, L.P.,

Issuer

NUSTAR ENERGY L.P.,

Guarantor

NUSTAR PIPELINE OPERATING PARTNERSHIP L.P.,

Affiliate Guarantor

SUNOCO LP,

Ultimate Parent Guarantor

EACH OF THE GUARANTEEING SUBSIDIARIES PARTY HERETO,

Guaranteeing Subsidiaries

and

COMPUTERSHARE TRUST COMPANY, N. A.,

Trustee

ELEVENTH SUPPLEMENTAL INDENTURE

Dated as of May 31, 2024

to

INDENTURE

Dated as of July 15, 2002

5.750% Senior Notes due 2025

6.00% Senior Notes due 2026

5.625% Senior Notes due 2027

6.375% Senior Notes due 2030

This ELEVENTH SUPPLEMENTAL INDENTURE, dated as of May 31, 2024 (this “Supplemental Indenture”), among NuStar Logistics, L.P. (formerly known as Valero Logistics Operations, L.P.), a Delaware limited partnership having its principal office at 19003 IH-10 West, San Antonio, Texas 78257 (the “Partnership”), NuStar Energy L.P. (formerly known as Valero L.P.), a Delaware limited partnership (the “Guarantor”), NuStar Pipeline Operating Partnership L.P. (formerly known as Kaneb Pipe Line Operating Partnership, L.P.), a Delaware limited partnership and an Affiliate of the Partnership (the “Affiliate Guarantor”), Sunoco LP, a Delaware limited partnership (“Sunoco” or the “Ultimate Parent Guarantor”), the Guaranteeing Subsidiaries (as defined herein), and Computershare Trust Company, N.A. (as successor-in-interest to Wells Fargo Bank, National Association), as trustee (the “Trustee”). This Supplemental Indenture amends and supplements the Original Indenture (as defined below), as previously amended and supplemented to date. The Original Indenture, as amended and supplemented to date and as further amended and supplemented pursuant to this Supplemental Indenture, is referred to herein as the “Indenture”.

RECITALS OF THE PARTNERSHIP

WHEREAS, the Partnership, the Guarantor and The Bank of New York, a New York banking corporation, as trustee, have heretofore executed and delivered the Indenture, dated as of July 15, 2002 (the “Original Indenture”), providing for the issuance from time to time of one or more series of the Partnership’s Securities (as defined in the Original Indenture), each to be guaranteed by the Guarantor and the terms of which are to be determined as set forth in Section 301 of the Original Indenture.

WHEREAS, the Partnership, the Guarantor, the Affiliate Guarantor and Wells Fargo Bank, National Association, as successor trustee to The Bank of New York, a New York banking corporation, have executed and delivered the Third Supplemental Indenture, dated as of July 1, 2005, amending and supplementing the Original Indenture and providing for an unconditional guarantee by the Affiliate Guarantor of the due and punctual payment of the principal of, and premium, if any, and interest on the Securities and all other amounts due and payable under the Original Indenture and the Securities by the Partnership.

WHEREAS, (i) the “5.75% Senior Notes due 2025” (the “2025 Notes”), (ii) the “6.00% Senior Notes due 2026” (the “2026 Notes”); (iii) the “5.625% Senior Notes due 2027” (the “2027 Notes”); and (iv) the “6.375% Senior Notes due 2030” (the “2030 Notes” and, collectively with the 2025 Notes, the 2026 Notes and the 2027 Notes, the “Notes”) have each been issued under the Indenture, and are outstanding as of the date of this Supplemental Indenture;

WHEREAS, Section 901 of the Original Indenture provides, among other things, that the Partnership, the Guarantor, the Affiliate Guarantor and the Trustee may enter into indentures supplemental to the Original Indenture for, among other things, the purpose of making any other provisions with respect to matters or questions arising under the Indenture which shall not adversely affect the interests of the Holders of Securities of any series in any material respect.

WHEREAS, the Partnership desires for Sunoco and certain of its subsidiaries (the “Guaranteeing Subsidiaries”) to each become an additional “Guarantor” under the Indenture;

WHEREAS, each of the Partnership, the Guarantor, the Affiliate Guarantor, Sunoco and the Guaranteeing Subsidiaries desires that Sunoco and each of the Guaranteeing Subsidiaries execute and deliver to the Trustee this Supplemental Indenture pursuant to which Sunoco and each of the Guaranteeing Subsidiaries shall guarantee the payment of each series of Notes.

Pursuant to Section 901 of the Original Indenture, the Trustee is authorized to execute and deliver this Supplemental Indenture.

NOW, THEREFORE, this Supplemental Indenture Witnesseth:

That in consideration of the premises and the issuance of the Notes, the Partnership, the Guarantor, the Affiliate Guarantor, Sunoco, the Guaranteeing Subsidiaries and the Trustee mutually covenant and agree, for the equal and proportionate benefit of all Holders of the Notes, as follows:

ARTICLE I

AMENDMENTS TO THE INDENTURE

Section 1.1 Definitions.

Section 101 of the Original Indenture is amended by inserting in its appropriate alphabetical position, the following definition:

“Additional Guarantor” shall mean each of Sunoco and the Guaranteeing Subsidiaries.

“Guaranteeing Subsidiaries” shall mean Aloha Petroleum LLC, a Delaware limited liability company, Aloha Petroleum, Ltd., a Hawaii corporation, Sunmarks, LLC, a Delaware limited liability company, Sunoco, LLC, a Delaware limited liability company, Sunoco Midstream LLC, a Delaware limited liability company, Sunoco Finance Corp., a Delaware corporation, Sunoco NLR LLC, a Delaware limited liability company, Sunoco Refined Products LLC, a Delaware limited liability company, and Sunoco Retail LLC, a Pennsylvania limited liability company, NuStar Permian Transportation and Storage, LLC, a Delaware limited liability company, NuStar Pipeline Partners L.P., a Delaware limited partnership, NuStar Permian Crude Logistics, LLC, a Delaware limited liability company, and NuStar Permian Holdings, LLC, a Delaware limited liability company.

“Sunoco” shall mean Sunoco LP, a Delaware limited partnership.

ARTICLE II

THE GUARANTEES

Section 2.1 From the date hereof, by executing this Supplemental Indenture, each of the Additional Guarantors shall become subject to the provisions of the Indenture as an additional “Guarantor” thereunder and hereby agrees to provide a Guarantee on the terms and subject to the conditions set forth in the Indenture.

ARTICLE III

MISCELLANEOUS

Section 3.1 Execution as Supplemental Indenture. This Supplemental Indenture is executed and shall be construed as an indenture supplemental to the Original Indenture and, as provided in the Original Indenture, this Supplemental Indenture forms a part thereof. Except as herein expressly otherwise defined, the use of the terms and expressions herein is in accordance with the definitions, uses and constructions contained in the Original Indenture.

Section 3.2 Responsibility for Recitals, Etc. The statements herein and in the Notes (except in the Trustee’s certificate of authentication) shall be taken as the statements of the Partnership, and the Trustee assumes no responsibility for the correctness thereof. The Trustee makes no representations as to the validity or sufficiency of this Supplemental Indenture or of the Notes. The Trustee shall not be accountable for the use or application by the Partnership of the Notes or of the proceeds thereof. Except as otherwise expressly provided herein, no duties, responsibilities or liabilities are assumed, or shall be construed to be assumed, by the Trustee by reason of this Supplemental Indenture. This Supplemental Indenture is executed and accepted by the Trustee subject to all the terms and conditions set forth in the Indenture with the same force and effect as if those terms and conditions were repeated at length herein and made applicable to the Trustee with respect hereto.

Section 3.3 Provisions Binding on Partnership’s and Guarantor’s Successors. All the covenants, stipulations, promises and agreements in this Supplemental Indenture contained by each of the Partnership, the Guarantor, the Affiliate Guarantor, Sunoco and each of the Guaranteeing Subsidiaries shall bind its respective successors and assigns regardless of whether so expressed.

Section 3.4 Governing Law. THIS SUPPLEMENTAL INDENTURE AND EACH NOTE SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK.

Section 3.5 Execution and Counterparts. This Supplemental Indenture may be executed with counterpart signature pages or in any number of counterparts, each of which shall be an original but such counterparts shall together constitute but one and the same instrument. The words “execution,” “signed,” “signature,” and words of like import in this Supplemental Indenture or in any other certificate, agreement or other document related to this Supplemental Indenture shall include images of manually executed signatures transmitted by facsimile or other electronic format (including, without limitation, “pdf”, “tif” or “jpg”). The use of electronic records (including, without limitation, any contract or other record created, generated, sent, communicated, received, or stored by electronic means) shall be of the same legal effect, validity and enforceability as a manually executed signature or use of a paper-based record-keeping system to the fullest extent permitted by applicable law, including the Federal Electronic Signatures in Global and National Commerce Act, the New York State Electronic Signatures and Records Act and any other applicable law, including, without limitation, any state law based on the Uniform Electronic Transactions Act or the Uniform Commercial Code.

Section 3.6 Capitalized Terms. Capitalized terms not otherwise defined in this Supplemental Indenture shall have the respective meanings assigned to them in the Original Indenture.

Section 3.7 Waiver of Jury Trial. THE PARTNERSHIP, THE GUARANTOR, THE AFFILIATE GUARANTOR, SUNOCO AND EACH OF THE GUARANTEEING SUBSIDIARIES AND THE TRUSTEE HEREBY IRREVOCABLY WAIVE, TO THE FULLEST EXTENT PERMITTED BY APPLICABLE LAW, ANY AND ALL RIGHT TO TRIAL BY JURY IN ANY LEGAL PROCEEDING ARISING OUT OF OR RELATING TO THIS SUPPLEMENTAL INDENTURE, THE NOTES, THE GUARANTEES THEREOF OR THE TRANSACTIONS CONTEMPLATED HEREBY.

Section 3.8 U.S.A. PATRIOT Act. The parties hereto acknowledge that in accordance with Section 326 of the U.S.A. PATRIOT Act, the Trustee is required to obtain, verify, and record information that identifies each person or legal entity that establishes a relationship or opens an account with the Trustee. The parties to this Supplemental Indenture agree that they shall provide the Trustee with such information as it may reasonably request in order for the Trustee to satisfy the requirements of the U.S.A. PATRIOT Act.

Section 3.9 Limitations on Losses or Damages. The Trustee will not be responsible or liable for any punitive, special, indirect or consequential loss or damage of any kind whatsoever (including lost profits), even if the Trustee has been advised of the likelihood of such loss or damage and regardless of the form of action.

Section 3.10 Force Majeure. The Trustee will not incur any liability for not performing any act or fulfilling any duty, obligation or responsibility under the Indenture or the Notes arising out of or caused, directly or indirectly, by circumstances beyond its control, including, without limitation, (i) any act or provision of any present or future law or regulation or governmental authority, (ii) any act of God, (iii) natural disaster, (iv) war, (v) terrorism, (vi) civil unrest, (vii) accidents, (viii) labor dispute, (ix) disease, (x) epidemic or pandemic, (xi) quarantine, (xii) national emergency, (xiii) loss or malfunction of utility or computer software or hardware, (xiv) communications system failure, (xv) malware or ransomware, (xvi) unavailability of the Federal Reserve Bank wire or telex system or other wire or other funds transfer systems, or (xvii) unavailability of securities clearing system; , it being understood that the Trustee shall use reasonable efforts that are consistent with accepted practices in the U.S. banking industry to resume performance as soon as practicable under the circumstances.

(The remainder of this page is intentionally blank.)

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

Eleventh Supplemental Indenture – Signature Page

Eleventh Supplemental Indenture – Signature Page

Eleventh Supplemental Indenture – Signature Page

Eleventh Supplemental Indenture – Signature Page

Eleventh Supplemental Indenture – Signature Page

Eleventh Supplemental Indenture – Signature Page

Eleventh Supplemental Indenture – Signature Page

Eleventh Supplemental Indenture – Signature Page

Exhibit 4.9

This Supplemental Indenture (this “Supplemental Indenture”), dated as of May 31, 2024, is among NuStar Energy L.P., a Delaware limited partnership, NuStar Logistics, L.P., a Delaware limited partnership, NuStar Permian Transportation and Storage, LLC, a Delaware limited liability company, NuStar Pipeline Operating Partnership L.P., a Delaware limited partnership, NuStar Pipeline Partners L.P., a Delaware limited partnership, NuStar Permian Crude Logistics, LLC, a Delaware limited liability company, and NuStar Permian Holdings, LLC, a Delaware limited liability company (each, a “Guaranteeing Subsidiary” and collectively the “Guaranteeing Subsidiaries”), Sunoco LP, a Delaware limited partnership (“Sunoco LP”), and Sunoco Finance Corp. (“Finance Corp.” and, together with Sunoco LP, the “Issuers”), the other Guarantors (as defined in the Indenture referred to herein) and U.S. Bank National Association, as trustee under the Indenture referred to below (the “Trustee”).

W I T N E S S E T H

WHEREAS, the Issuers have heretofore executed and delivered to the Trustee an indenture (the “Indenture”), dated as of January 23, 2018 providing for the issuance of their 5.500% Senior Notes due 2026 and 5.875% Senior Notes due 2028 (collectively, the “Notes”);

WHEREAS, the Indenture provides that under certain circumstances a Guaranteeing Subsidiary shall execute and deliver to the Trustee a supplemental indenture pursuant to which each Guaranteeing Subsidiary shall unconditionally guarantee all of the Issuers’ Obligations under the Notes and the Indenture on the terms and conditions set forth herein (the “Note Guarantee”); and

WHEREAS, pursuant to Section 9.01 of the Indenture, the Trustee is authorized to execute and deliver this Supplemental Indenture.

NOW, THEREFORE, in consideration of the foregoing and for other good and valuable consideration, the receipt of which is hereby acknowledged, the parties hereto mutually covenant and agree for the equal and ratable benefit of the Holders of the Notes as follows:

1. Capitalized Terms. Capitalized terms used herein without definition shall have the meanings assigned to them in the Indenture.

2. Agreement to Guarantee. Each of the Guaranteeing Subsidiaries hereby agrees to provide an unconditional guarantee on the terms and subject to the conditions set forth in the Note Guarantee and in the Indenture including but not limited to Article 10 thereof.

3. No Recourse Against Others. No past, present or future director, officer, partner, member, employee, incorporator, manager or unit holder or other owner of Equity Interests of any of the Guaranteeing Subsidiary, as such, shall have any liability for any obligations of the Issuers or any Guaranteeing Subsidiary under the Notes, any Note Guarantees, the Indenture or this Supplemental Indenture or for any claim based on, in respect of, or by reason of, such obligations or their creation. Each Holder of the Notes by accepting a Note waives and releases all such liability. The waiver and release are part of the consideration for issuance of the Notes. Such waiver may not be effective to waive liabilities under the federal securities laws and it is the view of the SEC that such a waiver is against public policy.

4. NEW YORK LAW TO GOVERN. THE LAW OF THE STATE OF NEW YORK SHALL GOVERN AND BE USED TO CONSTRUE THIS SUPPLEMENTAL INDENTURE.

5. Counterparts. The parties may sign any number of copies of this Supplemental Indenture. Each signed copy shall be an original, but all of them together represent the same agreement. The exchange of copies of this Supplemental Indenture and of signature pages by facsimile or PDF transmission shall constitute effective execution and delivery of this Supplemental Indenture as to the parties hereto, and may be used in lieu of the original Indenture for all purposes. Signatures of the parties hereto transmitted by facsimile or PDF shall be deemed to be their original signatures for all purposes.

6. Effect of Headings. The Section headings herein are for convenience only and shall not affect the construction hereof.

7. The Trustee. The Trustee shall not be responsible in any manner whatsoever for or in respect of the validity or sufficiency of this Supplemental Indenture or for or in respect of the recitals contained herein, all of which recitals are made solely by each Guaranteeing Subsidiary and the Issuers.

(Signature page follows.)

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

Signature Page to Supplemental Indenture

(5.500% Senior Notes due 2026, 5.875% Senior Notes due 2028)

Signature Page to Supplemental Indenture

(5.500% Senior Notes due 2026, 5.875% Senior Notes due 2028)

Signature Page to Supplemental Indenture

(5.500% Senior Notes due 2026, 5.875% Senior Notes due 2028)

Signature Page to Supplemental Indenture

(5.500% Senior Notes due 2026, 5.875% Senior Notes due 2028)

Signature Page to Supplemental Indenture

(5.500% Senior Notes due 2026, 5.875% Senior Notes due 2028)

Signature Page to Supplemental Indenture

(5.500% Senior Notes due 2026, 5.875% Senior Notes due 2028)

Exhibit 4.11

This Supplemental Indenture (this “Supplemental Indenture”), dated as of May 31, 2024, is among NuStar Energy L.P., a Delaware limited partnership, NuStar Logistics, L.P., a Delaware limited partnership, NuStar Permian Transportation and Storage, LLC, a Delaware limited liability company, NuStar Pipeline Operating Partnership L.P., a Delaware limited partnership, NuStar Pipeline Partners L.P., a Delaware limited partnership, NuStar Permian Crude Logistics, LLC, a Delaware limited liability company, and NuStar Permian Holdings, LLC, a Delaware limited liability company (each, a “Guaranteeing Subsidiary” and collectively the “Guaranteeing Subsidiaries”), Sunoco LP, a Delaware limited partnership (“Sunoco LP”), and Sunoco Finance Corp. (“Finance Corp.” and, together with Sunoco LP, the “Issuers”), the other Guarantors (as defined in the Indenture referred to herein) and U.S. Bank National Association, as trustee under the Indenture referred to below (the “Trustee”).

W I T N E S S E T H

WHEREAS, the Issuers have heretofore executed and delivered to the Trustee an indenture (the “Indenture”), dated as of March 14, 2019 providing for the issuance of their 6.000% Senior Notes due 2027 (collectively, the “Notes”);

WHEREAS, the Indenture provides that under certain circumstances a Guaranteeing Subsidiary shall execute and deliver to the Trustee a supplemental indenture pursuant to which each Guaranteeing Subsidiary shall unconditionally guarantee all of the Issuers’ Obligations under the Notes and the Indenture on the terms and conditions set forth herein (the “Note Guarantee”); and

WHEREAS, pursuant to Section 9.01 of the Indenture, the Trustee is authorized to execute and deliver this Supplemental Indenture.

NOW, THEREFORE, in consideration of the foregoing and for other good and valuable consideration, the receipt of which is hereby acknowledged, the parties hereto mutually covenant and agree for the equal and ratable benefit of the Holders of the Notes as follows:

1. Capitalized Terms. Capitalized terms used herein without definition shall have the meanings assigned to them in the Indenture.

2. Agreement to Guarantee. Each of the Guaranteeing Subsidiaries hereby agrees to provide an unconditional guarantee on the terms and subject to the conditions set forth in the Note Guarantee and in the Indenture including but not limited to Article 10 thereof.

3. No Recourse Against Others. No past, present or future director, officer, partner, member, employee, incorporator, manager or unit holder or other owner of Equity Interests of any of the Guaranteeing Subsidiary, as such, shall have any liability for any obligations of the Issuers or any Guaranteeing Subsidiary under the Notes, any Note Guarantees, the Indenture or this Supplemental Indenture or for any claim based on, in respect of, or by reason of, such obligations or their creation. Each Holder of the Notes by accepting a Note waives and releases all such liability. The waiver and release are part of the consideration for issuance of the Notes. Such waiver may not be effective to waive liabilities under the federal securities laws and it is the view of the SEC that such a waiver is against public policy.

4. NEW YORK LAW TO GOVERN. THE LAW OF THE STATE OF NEW YORK SHALL GOVERN AND BE USED TO CONSTRUE THIS SUPPLEMENTAL INDENTURE.

5. Counterparts. The parties may sign any number of copies of this Supplemental Indenture. Each signed copy shall be an original, but all of them together represent the same agreement. The exchange of copies of this Supplemental Indenture and of signature pages by facsimile or PDF transmission shall constitute effective execution and delivery of this Supplemental Indenture as to the parties hereto, and may be used in lieu of the original Indenture for all purposes. Signatures of the parties hereto transmitted by facsimile or PDF shall be deemed to be their original signatures for all purposes.

6. Effect of Headings. The Section headings herein are for convenience only and shall not affect the construction hereof.

7. The Trustee. The Trustee shall not be responsible in any manner whatsoever for or in respect of the validity or sufficiency of this Supplemental Indenture or for or in respect of the recitals contained herein, all of which recitals are made solely by each Guaranteeing Subsidiary and the Issuers.

(Signature page follows.)

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

Signature Page to Supplemental Indenture

(6.000% Senior Notes due 2027)

Signature Page to Supplemental Indenture

(6.000% Senior Notes due 2027)

Signature Page to Supplemental Indenture

(6.000% Senior Notes due 2027)

Signature Page to Supplemental Indenture

(6.000% Senior Notes due 2027)

Signature Page to Supplemental Indenture

(6.000% Senior Notes due 2027)

Signature Page to Supplemental Indenture

(6.000% Senior Notes due 2027)

Exhibit 4.13

This Supplemental Indenture (this “Supplemental Indenture”), dated as of May 31, 2024, is among NuStar Energy L.P., a Delaware limited partnership, NuStar Logistics, L.P., a Delaware limited partnership, NuStar Permian Transportation and Storage, LLC, a Delaware limited liability company, NuStar Pipeline Operating Partnership L.P., a Delaware limited partnership, NuStar Pipeline Partners L.P., a Delaware limited partnership, NuStar Permian Crude Logistics, LLC, a Delaware limited liability company, and NuStar Permian Holdings, LLC, a Delaware limited liability company (each, a “Guaranteeing Subsidiary” and collectively the “Guaranteeing Subsidiaries”), Sunoco LP, a Delaware limited partnership (“Sunoco LP”), and Sunoco Finance Corp. (“Finance Corp.” and, together with Sunoco LP, the “Issuers”), the other Guarantors (as defined in the Indenture referred to herein) and U.S. Bank National Association, as trustee under the Indenture referred to below (the “Trustee”).

W I T N E S S E T H

WHEREAS, the Issuers have heretofore executed and delivered to the Trustee an indenture (the “Indenture”), dated as of November 24, 2020 providing for the issuance of their 4.500% Senior Notes due 2029 (collectively, the “Notes”);

WHEREAS, the Indenture provides that under certain circumstances a Guaranteeing Subsidiary shall execute and deliver to the Trustee a supplemental indenture pursuant to which each Guaranteeing Subsidiary shall unconditionally guarantee all of the Issuers’ Obligations under the Notes and the Indenture on the terms and conditions set forth herein (the “Note Guarantee”); and

WHEREAS, pursuant to Section 9.01 of the Indenture, the Trustee is authorized to execute and deliver this Supplemental Indenture.

NOW, THEREFORE, in consideration of the foregoing and for other good and valuable consideration, the receipt of which is hereby acknowledged, the parties hereto mutually covenant and agree for the equal and ratable benefit of the Holders of the Notes as follows:

1. Capitalized Terms. Capitalized terms used herein without definition shall have the meanings assigned to them in the Indenture.

2. Agreement to Guarantee. Each of the Guaranteeing Subsidiaries hereby agrees to provide an unconditional guarantee on the terms and subject to the conditions set forth in the Note Guarantee and in the Indenture including but not limited to Article 10 thereof.

3. No Recourse Against Others. No past, present or future director, officer, partner, member, employee, incorporator, manager or unit holder or other owner of Equity Interests of any of the Guaranteeing Subsidiary, as such, shall have any liability for any obligations of the Issuers or any Guaranteeing Subsidiary under the Notes, any Note Guarantees, the Indenture or this Supplemental Indenture or for any claim based on, in respect of, or by reason of, such obligations or their creation. Each Holder of the Notes by accepting a Note waives and releases all such liability. The waiver and release are part of the consideration for issuance of the Notes. Such waiver may not be effective to waive liabilities under the federal securities laws and it is the view of the SEC that such a waiver is against public policy.

4. NEW YORK LAW TO GOVERN. THE LAW OF THE STATE OF NEW YORK SHALL GOVERN AND BE USED TO CONSTRUE THIS SUPPLEMENTAL INDENTURE.

5. Counterparts. The parties may sign any number of copies of this Supplemental Indenture. Each signed copy shall be an original, but all of them together represent the same agreement. The exchange of copies of this Supplemental Indenture and of signature pages by facsimile or PDF transmission shall constitute effective execution and delivery of this Supplemental Indenture as to the parties hereto, and may be used in lieu of the original Indenture for all purposes. Signatures of the parties hereto transmitted by facsimile or PDF shall be deemed to be their original signatures for all purposes.

6. Effect of Headings. The Section headings herein are for convenience only and shall not affect the construction hereof.

7. The Trustee. The Trustee shall not be responsible in any manner whatsoever for or in respect of the validity or sufficiency of this Supplemental Indenture or for or in respect of the recitals contained herein, all of which recitals are made solely by each Guaranteeing Subsidiary and the Issuers.

(Signature page follows.)

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

Signature Page to Supplemental Indenture

(4.500% Senior Notes due 2029)

Signature Page to Supplemental Indenture

(4.500% Senior Notes due 2029)

Signature Page to Supplemental Indenture

(4.500% Senior Notes due 2029)

Signature Page to Supplemental Indenture

(4.500% Senior Notes due 2029)

Signature Page to Supplemental Indenture

(4.500% Senior Notes due 2029)

Signature Page to Supplemental Indenture

(4.500% Senior Notes due 2029)

Exhibit 4.15

This Supplemental Indenture (this “Supplemental Indenture”), dated as of May 31, 2024, is among NuStar Energy L.P., a Delaware limited partnership, NuStar Logistics, L.P., a Delaware limited partnership, NuStar Permian Transportation and Storage, LLC, a Delaware limited liability company, NuStar Pipeline Operating Partnership L.P., a Delaware limited partnership, NuStar Pipeline Partners L.P., a Delaware limited partnership, NuStar Permian Crude Logistics, LLC, a Delaware limited liability company, and NuStar Permian Holdings, LLC, a Delaware limited liability company (each, a “Guaranteeing Subsidiary” and collectively the “Guaranteeing Subsidiaries”), Sunoco LP, a Delaware limited partnership (“Sunoco LP”), and Sunoco Finance Corp. (“Finance Corp.” and, together with Sunoco LP, the “Issuers”), the other Guarantors (as defined in the Indenture referred to herein) and U.S. Bank National Association, as trustee under the Indenture referred to below (the “Trustee”).

W I T N E S S E T H

WHEREAS, the Issuers have heretofore executed and delivered to the Trustee an indenture (the “Indenture”), dated as of October 20, 2021 providing for the issuance of their 4.500% Senior Notes due 2030 (collectively, the “Notes”);

WHEREAS, the Indenture provides that under certain circumstances a Guaranteeing Subsidiary shall execute and deliver to the Trustee a supplemental indenture pursuant to which each Guaranteeing Subsidiary shall unconditionally guarantee all of the Issuers’ Obligations under the Notes and the Indenture on the terms and conditions set forth herein (the “Note Guarantee”); and

WHEREAS, pursuant to Section 9.01 of the Indenture, the Trustee is authorized to execute and deliver this Supplemental Indenture.

NOW, THEREFORE, in consideration of the foregoing and for other good and valuable consideration, the receipt of which is hereby acknowledged, the parties hereto mutually covenant and agree for the equal and ratable benefit of the Holders of the Notes as follows:

1. Capitalized Terms. Capitalized terms used herein without definition shall have the meanings assigned to them in the Indenture.

2. Agreement to Guarantee. Each of the Guaranteeing Subsidiaries hereby agrees to provide an unconditional guarantee on the terms and subject to the conditions set forth in the Note Guarantee and in the Indenture including but not limited to Article 10 thereof.

3. No Recourse Against Others. No past, present or future director, officer, partner, member, employee, incorporator, manager or unit holder or other owner of Equity Interests of any of the Guaranteeing Subsidiary, as such, shall have any liability for any obligations of the Issuers or any Guaranteeing Subsidiary under the Notes, any Note Guarantees, the Indenture or this Supplemental Indenture or for any claim based on, in respect of, or by reason of, such obligations or their creation. Each Holder of the Notes by accepting a Note waives and releases all such liability. The waiver and release are part of the consideration for issuance of the Notes. Such waiver may not be effective to waive liabilities under the federal securities laws and it is the view of the SEC that such a waiver is against public policy.

4. NEW YORK LAW TO GOVERN. THE LAW OF THE STATE OF NEW YORK SHALL GOVERN AND BE USED TO CONSTRUE THIS SUPPLEMENTAL INDENTURE.

5. Counterparts. The parties may sign any number of copies of this Supplemental Indenture. Each signed copy shall be an original, but all of them together represent the same agreement. The exchange of copies of this Supplemental Indenture and of signature pages by facsimile or PDF transmission shall constitute effective execution and delivery of this Supplemental Indenture as to the parties hereto, and may be used in lieu of the original Indenture for all purposes. Signatures of the parties hereto transmitted by facsimile or PDF shall be deemed to be their original signatures for all purposes.

6. Effect of Headings. The Section headings herein are for convenience only and shall not affect the construction hereof.

7. The Trustee. The Trustee shall not be responsible in any manner whatsoever for or in respect of the validity or sufficiency of this Supplemental Indenture or for or in respect of the recitals contained herein, all of which recitals are made solely by each Guaranteeing Subsidiary and the Issuers.

(Signature page follows.)

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

Signature Page to Supplemental Indenture

(4.500% Senior Notes due 2030)

Signature Page to Supplemental Indenture

(4.500% Senior Notes due 2030)

Signature Page to Supplemental Indenture

(4.500% Senior Notes due 2030)

Signature Page to Supplemental Indenture

(4.500% Senior Notes due 2030)

Signature Page to Supplemental Indenture

(4.500% Senior Notes due 2030)

Signature Page to Supplemental Indenture

(4.500% Senior Notes due 2030)

Exhibit 4.17

This Supplemental Indenture (this “Supplemental Indenture”), dated as of May 31, 2024, is among NuStar Energy L.P., a Delaware limited partnership, NuStar Logistics, L.P., a Delaware limited partnership, NuStar Permian Transportation and Storage, LLC, a Delaware limited liability company, NuStar Pipeline Operating Partnership L.P., a Delaware limited partnership, NuStar Pipeline Partners L.P., a Delaware limited partnership, NuStar Permian Crude Logistics, LLC, a Delaware limited liability company, and NuStar Permian Holdings, LLC, a Delaware limited liability company (each, a “Guaranteeing Subsidiary” and collectively the “Guaranteeing Subsidiaries”), Sunoco LP, a Delaware limited partnership (“Sunoco LP”), and Sunoco Finance Corp. (“Finance Corp.” and, together with Sunoco LP, the “Issuers”), the other Guarantors (as defined in the Indenture referred to herein) and U.S. Bank National Association, as trustee under the Indenture referred to below (the “Trustee”).

W I T N E S S E T H

WHEREAS, the Issuers have heretofore executed and delivered to the Trustee an indenture (the “Indenture”), dated as of September 20, 2023 providing for the issuance of their 7.000% Senior Notes due 2028 (collectively, the “Notes”);

WHEREAS, the Indenture provides that under certain circumstances a Guaranteeing Subsidiary shall execute and deliver to the Trustee a supplemental indenture pursuant to which each Guaranteeing Subsidiary shall unconditionally guarantee all of the Issuers’ Obligations under the Notes and the Indenture on the terms and conditions set forth herein (the “Note Guarantee”); and

WHEREAS, pursuant to Section 9.01 of the Indenture, the Trustee is authorized to execute and deliver this Supplemental Indenture.

NOW, THEREFORE, in consideration of the foregoing and for other good and valuable consideration, the receipt of which is hereby acknowledged, the parties hereto mutually covenant and agree for the equal and ratable benefit of the Holders of the Notes as follows:

1. Capitalized Terms. Capitalized terms used herein without definition shall have the meanings assigned to them in the Indenture.

2. Agreement to Guarantee. Each of the Guaranteeing Subsidiaries hereby agrees to provide an unconditional guarantee on the terms and subject to the conditions set forth in the Note Guarantee and in the Indenture including but not limited to Article 10 thereof.

3. No Recourse Against Others. No past, present or future director, officer, partner, member, employee, incorporator, manager or unit holder or other owner of Equity Interests of any of the Guaranteeing Subsidiary, as such, shall have any liability for any obligations of the Issuers or any Guaranteeing Subsidiary under the Notes, any Note Guarantees, the Indenture or this Supplemental Indenture or for any claim based on, in respect of, or by reason of, such obligations or their creation. Each Holder of the Notes by accepting a Note waives and releases all such liability. The waiver and release are part of the consideration for issuance of the Notes. Such waiver may not be effective to waive liabilities under the federal securities laws and it is the view of the SEC that such a waiver is against public policy.

4. NEW YORK LAW TO GOVERN. THE LAW OF THE STATE OF NEW YORK SHALL GOVERN AND BE USED TO CONSTRUE THIS SUPPLEMENTAL INDENTURE.

5. Counterparts. The parties may sign any number of copies of this Supplemental Indenture. Each signed copy shall be an original, but all of them together represent the same agreement. The exchange of copies of this Supplemental Indenture and of signature pages by facsimile or PDF transmission shall constitute effective execution and delivery of this Supplemental Indenture as to the parties hereto, and may be used in lieu of the original Indenture for all purposes. Signatures of the parties hereto transmitted by facsimile or PDF shall be deemed to be their original signatures for all purposes.

6. Effect of Headings. The Section headings herein are for convenience only and shall not affect the construction hereof.

7. The Trustee. The Trustee shall not be responsible in any manner whatsoever for or in respect of the validity or sufficiency of this Supplemental Indenture or for or in respect of the recitals contained herein, all of which recitals are made solely by each Guaranteeing Subsidiary and the Issuers.

(Signature page follows.)

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

Signature Page to Supplemental Indenture

(7.000% Senior Notes due 2028)

Signature Page to Supplemental Indenture

(7.000% Senior Notes due 2028)

Signature Page to Supplemental Indenture

(7.000% Senior Notes due 2028)

Signature Page to Supplemental Indenture

(7.000% Senior Notes due 2028)

Signature Page to Supplemental Indenture

(7.000% Senior Notes due 2028)

Signature Page to Supplemental Indenture

(7.000% Senior Notes due 2028)

Exhibit 4.19

This Supplemental Indenture (this “Supplemental Indenture”), dated as of May 31, 2024, is among NuStar Energy L.P., a Delaware limited partnership, NuStar Logistics, L.P., a Delaware limited partnership, NuStar Permian Transportation and Storage, LLC, a Delaware limited liability company, NuStar Pipeline Operating Partnership L.P., a Delaware limited partnership, NuStar Pipeline Partners L.P., a Delaware limited partnership, NuStar Permian Crude Logistics, LLC, a Delaware limited liability company, and NuStar Permian Holdings, LLC, a Delaware limited liability company (each, a “Guaranteeing Subsidiary” and collectively the “Guaranteeing Subsidiaries”), Sunoco LP, a Delaware limited partnership (the “Issuer”), the other Guarantors (as defined in the Indenture referred to herein) and U.S. Bank Trust Company, National Association, as trustee under the Indenture referred to below (the “Trustee”).

W I T N E S S E T H

WHEREAS, the Issuer has heretofore executed and delivered to the Trustee an indenture (the “Indenture”), dated as of April 30, 2024 providing for the issuance of its (i) 7.000% Senior Notes due 2029 (the “2029 Notes”) and (ii) 7.250% Senior Notes due 2032 (the “2032 Notes” and, together with the 2029 Notes, the “Notes”);

WHEREAS, the Indenture provides that under certain circumstances a Guaranteeing Subsidiary shall execute and deliver to the Trustee a supplemental indenture pursuant to which each Guaranteeing Subsidiary shall unconditionally guarantee all of the Issuer’s Obligations under the Notes and the Indenture on the terms and conditions set forth herein (the “Note Guarantee”); and

WHEREAS, pursuant to Section 9.01 of the Indenture, the Trustee is authorized to execute and deliver this Supplemental Indenture.

NOW, THEREFORE, in consideration of the foregoing and for other good and valuable consideration, the receipt of which is hereby acknowledged, the parties hereto mutually covenant and agree for the equal and ratable benefit of the Holders of the Notes as follows:

1. Capitalized Terms. Capitalized terms used herein without definition shall have the meanings assigned to them in the Indenture.

2. Agreement to Guarantee. Each of the Guaranteeing Subsidiaries hereby agrees to provide an unconditional guarantee on the terms and subject to the conditions set forth in the Note Guarantee and in the Indenture including but not limited to Article 10 thereof.

3. No Recourse Against Others. No past, present or future director, officer, partner, member, employee, incorporator, manager or unit holder or other owner of Equity Interests of any of the Guaranteeing Subsidiary, as such, shall have any liability for any obligations of the Issuer or any Guaranteeing Subsidiary under the Notes, any Note Guarantees, the Indenture or this Supplemental Indenture or for any claim based on, in respect of, or by reason of, such obligations or their creation. Each Holder of the Notes by accepting a Note waives and releases all such liability. The waiver and release are part of the consideration for issuance of the Notes.

4. NEW YORK LAW TO GOVERN. THE LAW OF THE STATE OF NEW YORK SHALL GOVERN AND BE USED TO CONSTRUE THIS SUPPLEMENTAL INDENTURE.

5. Counterparts. The parties may sign any number of copies of this Supplemental Indenture. Each signed copy shall be an original, but all of them together represent the same agreement. The exchange of copies of this Supplemental Indenture and of signature pages by facsimile or PDF transmission shall constitute effective execution and delivery of this Supplemental Indenture as to the parties hereto, and may be used in lieu of the original Indenture for all purposes. Signatures of the parties hereto transmitted by facsimile or PDF shall be deemed to be their original signatures for all purposes.

6. Effect of Headings. The Section headings herein are for convenience only and shall not affect the construction hereof.

7. The Trustee. The Trustee shall not be responsible in any manner whatsoever for or in respect of the validity or sufficiency of this Supplemental Indenture or for or in respect of the recitals contained herein, all of which recitals are made solely by each Guaranteeing Subsidiary and the Issuer.

(Signature page follows.)

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

Signature Page to Supplemental Indenture

(7.000% Senior Notes due 2029, 7.250% Senior Notes due 2032)

Signature Page to Supplemental Indenture

(7.000% Senior Notes due 2029, 7.250% Senior Notes due 2032)

Signature Page to Supplemental Indenture

(7.000% Senior Notes due 2029, 7.250% Senior Notes due 2032)

Signature Page to Supplemental Indenture

(7.000% Senior Notes due 2029, 7.250% Senior Notes due 2032)

Signature Page to Supplemental Indenture

(7.000% Senior Notes due 2029, 7.250% Senior Notes due 2032)

Signature Page to Supplemental Indenture

(7.000% Senior Notes due 2029, 7.250% Senior Notes due 2032)