Leadership shift at Hess Midstream (NYSE: HESM) as Michael Bast becomes president and COO

Rhea-AI Filing Summary

Hess Midstream reported a leadership change in its general partner’s management. John A. Gatling resigned as President and Chief Operating Officer of Hess Midstream GP LLC, effective September 26, 2025.

The board appointed Michael S. Bast to succeed him as President and COO, also effective September 26, 2025. Bast has held senior operational roles at Hess Corporation since 2007, most recently overseeing upstream operations and maintenance in the Bakken. Effective October 1, 2025, he will also be an employee of Chevron U.S.A. Inc. Officers from Chevron affiliates serving as officers of Hess Midstream GP LLC do not receive additional compensation from Hess Midstream or its general partner for those roles, and Bast will be entitled to indemnification under the partnership agreement.

Insights

Energy infrastructure governance analyst

Hess Midstream announces a planned transition to a new President and COO at its general partner.

Hess Midstream’s general partner will see John A. Gatling step down and Michael S. Bast assume the President and COO roles on September 26, 2025. Bast’s background spans upstream and midstream operations at Hess, including oversight of Bakken production and gathering assets.

The filing notes that Bast will become an employee of Chevron U.S.A. Inc. on October 1, 2025, consistent with the company’s ownership by Chevron affiliates. Officers from Chevron-related entities serving at the general partner do not receive additional compensation from Hess Midstream, and Bast benefits from indemnification under the limited partnership agreement.

8-K Event Classification

Item 5.02 — Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers

1 item

Item 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers Governance

Key personnel changes including departures, elections, or appointments of directors and executive officers.

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Accepted by SEC EDGAR 09/05/2025 - 04:17 PM Learn about SEC filing dates

FAQ

What executive change did Hess Midstream (HESM) disclose in this 8-K?

Hess Midstream disclosed that John A. Gatling resigned as President and Chief Operating Officer of Hess Midstream GP LLC, effective September 26, 2025, and that the board appointed Michael S. Bast to succeed him in the same role on that effective date.

Who is Michael S. Bast, the new President and COO of Hess Midstream GP LLC?

Michael S. Bast has worked at Hess since 2007 and most recently served as Director of Upstream Operations and Maintenance, Reliability and Integrity, overseeing Bakken oil and gas production, maintenance, and engineering. He previously led Midstream Operations, managing gathering, processing, export, and disposal activities from November 2019 to November 2022.

When do the leadership changes at Hess Midstream GP LLC become effective?

John A. Gatling’s resignation and Michael S. Bast’s appointment as President and Chief Operating Officer of Hess Midstream GP LLC both become effective on September 26, 2025. Additionally, Bast will become an employee of Chevron U.S.A. Inc. effective October 1, 2025, following this transition.

Will Michael S. Bast receive additional compensation from Hess Midstream (HESM) for his new role?

The filing states that officers or employees of Chevron U.S.A. Inc. or any Chevron subsidiary who serve as officers of Hess Midstream GP LLC do not receive additional compensation from Hess Midstream LP or its general partner for their service, so Bast will not receive extra pay from these entities.

Does Michael S. Bast have related-party interests disclosed by Hess Midstream (HESM)?

Hess Midstream states that Michael S. Bast has no direct or indirect material interest in transactions covered by Item 404(a) of Regulation S-K, other than through his employment with Chevron U.S.A. Inc. or its subsidiaries, including Hess, which are part of the company’s existing ownership structure.

How is Hess Midstream (HESM) related to Chevron through its ownership structure?

Hess Midstream is managed and controlled by Hess Midstream GP LLC, which is wholly owned by Hess Infrastructure Partners GP LLC. That entity is owned by Hess Investments North Dakota LLC, an indirect, wholly owned subsidiary of Chevron Corporation, meaning Chevron affiliates ultimately own the general partner structure.

DE false 0001789832 0001789832 2025-09-04 2025-09-04

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): September 4, 2025

Hess Midstream LP

(Exact Name of Registrant as Specified in Its Charter)

DELAWARE		No. 001-39163		No. 84-3211812
(State or Other Jurisdiction of Incorporation)		(Commission File Number)		(IRS Employer Identification No.)

1501 McKinney Street

Houston, Texas 77010

(Address of Principal Executive Offices) (Zip Code)

Registrant’s Telephone Number, Including Area Code: (713) 496-4200

N/A

(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 Symbol(s)		Name of each exchange on which registered
Class A shares representing limited partner interests		HESM		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 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.

Departure and Appointment of Officers

On September 4, 2025, John A. Gatling resigned from his role as President and Chief Operating Officer of Hess Midstream GP LLC (“GP LLC”), the general partner of Hess Midstream GP LP, a Delaware limited partnership (the “General Partner”) and the general partner of Hess Midstream LP, a Delaware limited partnership (the “Company”), effective as of September 26, 2025. On September 4, 2025, the board of directors of GP LLC appointed Michael S. Bast to succeed Mr. Gatling in this role, also effective as of September 26, 2025.

Since November 2022, Mr. Bast, age 49, has served as the Director of the Upstream Operations and the Maintenance, Reliability and Integrity departments at Hess Corporation (“Hess”), a direct, wholly owned subsidiary of Chevron Corporation, a Delaware corporation,¹ and is responsible for overseeing oil and gas production, maintenance and engineering activities in the Bakken. From November 2019 to November 2022, Mr. Bast served as Director of Midstream Operations at Hess and was responsible for overseeing oil and gas and water gathering, processing, export and disposal activities. Mr. Bast joined Hess in 2007 and previously worked at Chevron from 1998 to 2006, where he held several domestic and international positions supporting the upstream business. Effective as of October 1, 2025, Mr. Bast will also be an employee of Chevron U.S.A. Inc. (“CUSA”), an indirect, wholly owned subsidiary of Chevron Corporation.

The officers or employees of CUSA or any subsidiary of Chevron Corporation who serve as officers of GP LLC do not receive additional compensation from the Company or the General Partner for their service as an officer. Mr. Bast will have rights to indemnification by the Company pursuant to the Company’s Amended and Restated Agreement of Limited Partnership.

Mr. Bast does not have any direct or indirect material interest in any transaction or series of similar transactions contemplated by Item 404(a) of Regulation S-K other than through his employment with CUSA or any subsidiary of Chevron Corporation, including Hess.

Relationships

The Company is managed and controlled by GP LLC. GP LLC is wholly owned by Hess Infrastructure Partners GP LLC (“HIP GP”), and HIP GP is owned 100% by Hess Investments North Dakota LLC, a Delaware limited liability company (“HINDL”) and an indirect, wholly owned subsidiary of Chevron Corporation. As a result, certain individuals, including officers and directors of Chevron, HINDL, HIP GP and the General Partner, serve as officers and/or directors of more than one of such other entities.

For relationships between the Company, the General Partner, GP LLC, HIP GP and Hess, see Item 13 “Certain Relationships and Related Party Transactions and Director Independence” in the Company’s Annual Report on Form 10-K for the year ended December 31, 2024, which is incorporated into this Item 5.02 by reference.

¹  Unless expressly stated otherwise herein, the term “Chevron” may refer to Chevron Corporation, one or more of its consolidated subsidiaries, or all of them taken as a whole, but unless stated otherwise they do not include “affiliates” of Chevron – that is, those companies accounted for by the equity method (generally owned 50% or less) or non-equity method investments.

SIGNATURES

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

				HESS MIDSTREAM LP
				By:		Hess Midstream GP LP, its general partner
				By:		Hess Midstream GP LLC, its general partner
Date: September 5, 2025				By:		/s/ Gabriela B. Boersner
						Name: Gabriela B. Boersner
						Title: General Counsel and Secretary