Sec Form 4 Filing - Global Infrastructure Investors II, LLC @ Hess Midstream LP - 2021-10-08

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person Global Infrastructure Investors II, LLC 2. Issuer Name and Ticker or Trading Symbol Hess Midstream LP [ HESM] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X __ Director X __ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) 1345 AVENUE OF THE AMERICAS, 30TH FLOOR 3. Date of Earliest Transaction (MM/DD/YY) 10/08/2021 (Street) NEW YORK, NY10105 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) _____ Form filed by One Reporting Person __ X __ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Class A Shares 10/08/2021 C 4,312,500 A $ 0 4,312,500 I See footnotes ( 1 ) ( 2 ) Class A Shares 10/08/2021 S 4,312,500 D $ 25.116 0 I See footnotes ( 1 ) ( 2 ) Class B Shares 10/08/2021 J( 3 ) 4,312,500 D $ 0 109,820,964 I See footnote ( 4 ) Class A Shares 449,000 I See footnote ( 4 )

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Report ed Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares Opco Class B Units ( 5 ) 10/08/2021 C 4,312,500 ( 5 ) ( 5 ) Class A Shares 4,312,500 $ 0 109,820,964 I See footnotes ( 1 ) ( 2 )

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Global Infrastructure Investors II, LLC 1345 AVENUE OF THE AMERICAS, 30TH FLOOR NEW YORK, NY10105 X X Global Infrastructure GP II, L.P. 1345 AVENUE OF THE AMERICAS, 30TH FLOOR NEW YORK, NY10105 X X GIP Blue Holding GP, LLC 1345 AVENUE OF THE AMERICAS, 30TH FLOOR NEW YORK, NY10105 X X GIP II Blue Holding, L.P. 1345 AVENUE OF THE AMERICAS, 30TH FLOOR NEW YORK, NY10105 X X Signatures Global Infrastructure Investors II, LLC, By: /s/ Mark Levitt, Secretary 10/12/2021 Signature of Reporting Person Date Global Infrastructure GP II, L.P., By: Global Infrastructure Investors II, LLC, its general partner, By: /s/ Mark Levitt, Secretary 10/12/2021 Signature of Reporting Person Date GIP Blue Holding GP, LLC, By: /s/ Mark Levitt, Manager 10/12/2021 Signature of Reporting Person Date GIP II Blue Holding, L.P., By: GIP Blue Holding GP, LLC, its general partner, By: /s/ Mark Levitt, Manager 10/12/2021 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Represents securities held by GIP II Blue Holding, L.P. ("Blue Holding"). ( 2 )Global Infrastructure Investors II, LLC ("Global Investors") is the sole general partner of Global Infrastructure GP II, L.P. ("Global GP"), which is the sole member of GIP Blue Holding GP, LLC, ("Blue Holding GP"), which is the general partner of Blue Holding. As such, each of Global Investors, Global GP and Blue Holding GP may be deemed to beneficially own the securities held of record by Blue Holding. Each such entity disclaims beneficial ownership of such securities except to the extent of their pecuniary interest therein. ( 3 )Reflects the cancellation for no consideration of Class B Shares in connection with the conversion of the Opco Class B Units into Class A Shares. ( 4 )Represents securities held by Hess Midstream GP LP. Hess Infrastructure Partners GP LLC is the general partner of Hess Midstream GP LLC, which is the general partner of Hess Midsteam LP. Hess Infrastructure Partners GP LLC is a 50/50 joint venture between Hess Investments North Dakota LLC and Blue Holding. As such, each of the foregoing entities may be deemed to beneficially owned the securities held of record by Hess Midstream GP LP. Each such entity disclaims beneficial ownership of such securities except to the extent of their pecuniary interest therein. ( 5 )The Opco Class B Units may be converted at any time in to Class A Shares on a one-to-one basis and have no expiration date.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

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