HESM

SEC source: 0000950170-25-037239 · ownership.xml · nonDerivative · entry 1

REDDY J PATRICK · CIK 0001181025 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 22,825

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: Class A shares acquired upon settlement of phantom shares granted in 2024 for service as director. Each phantom share is the economic equivalent of one Class A share.

SEC source: 0000950170-25-037240 · ownership.xml · derivative · entry 3

Letwin Stephen J J · CIK 0001361351 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,612

Underlying: Class A Shares · 1,612 shares

Expires not disclosed

F3 · derivative.exercise_price: Each phantom share is the economic equivalent of one Class A Share.

F4 · derivative.exercise_date: The phantom shares will vest on March 8, 2026 and have no expiration date.

F4 · derivative.expiration_date: The phantom shares will vest on March 8, 2026 and have no expiration date.

SEC source: 0000950170-25-037240 · ownership.xml · derivative · entry 2

Letwin Stephen J J · CIK 0001361351 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Class A Shares · 1,855 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_date: The 2024 phantom shares vested on March 8, 2025 and have no expiration date.

F2 · derivative.expiration_date: The 2024 phantom shares vested on March 8, 2025 and have no expiration date.

SEC source: 0000950170-25-037240 · ownership.xml · nonDerivative · entry 1

Letwin Stephen J J · CIK 0001361351 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 30,811

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: Class A shares acquired upon settlement of phantom shares granted in 2024 for service as director. Each phantom share is the economic equivalent of one Class A share.

SEC source: 0000950170-25-037242 · ownership.xml · derivative · entry 1

Stein Jonathan C. · CIK 0001702288 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,199

Underlying: Class A Shares · 6,199 shares

Expires not disclosed

F1 · derivative.exercise_price: Each phantom share is the economic equivalent of one Class A Share.

F2 · derivative.exercise_date: The phantom shares will vest in three equal installments beginning on March 8, 2026 and have no expiration date.

F2 · derivative.expiration_date: The phantom shares will vest in three equal installments beginning on March 8, 2026 and have no expiration date.

SEC source: 0000950170-25-037241 · ownership.xml · derivative · entry 8

Gatling John A. · CIK 0001702312 · President and COO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,199

Underlying: Class A Shares · 6,199 shares

Expires not disclosed

F6 · derivative.exercise_price: Each phantom share is the economic equivalent of one Class A Share.

F7 · derivative.exercise_date: The phantom shares will vest in three equal installments beginning March 8, 2026 and have no expiration date.

F7 · derivative.expiration_date: The phantom shares will vest in three equal installments beginning March 8, 2026 and have no expiration date.

SEC source: 0000950170-25-037241 · ownership.xml · derivative · entry 7

Gatling John A. · CIK 0001702312 · President and COO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,757

Underlying: Class A Shares · 2,378 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F5 · derivative.exercise_date: The remaining 2024 phantom shares vest ratably on March 8, 2026 and March 8, 2027 and have no expiration date.

F5 · derivative.expiration_date: The remaining 2024 phantom shares vest ratably on March 8, 2026 and March 8, 2027 and have no expiration date.

SEC source: 0000950170-25-037241 · ownership.xml · derivative · entry 6

Gatling John A. · CIK 0001702312 · President and COO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,948

Underlying: Class A Shares · 2,948 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F4 · derivative.exercise_date: The remaining 2022 phantom shares vest on March 8, 2026 and have no expiration date.

F4 · derivative.expiration_date: The remaining 2022 phantom shares vest on March 8, 2026 and have no expiration date.

SEC source: 0000950170-25-037241 · ownership.xml · derivative · entry 5

Gatling John A. · CIK 0001702312 · President and COO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Class A Shares · 2,486 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_date: The 2022 phantom shares vested on March 8, 2025 and have no expiration date.

F3 · derivative.expiration_date: The 2022 phantom shares vested on March 8, 2025 and have no expiration date.

SEC source: 0000950170-25-037241 · ownership.xml · nonDerivative · entry 3

Gatling John A. · CIK 0001702312 · President and COO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 64,544

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: Class A shares acquired upon settlement of phantom shares granted under Hess Midstream's 2017 Long Term Incentive Plan.

SEC source: 0000950170-25-037241 · ownership.xml · nonDerivative · entry 2

Gatling John A. · CIK 0001702312 · President and COO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 62,166

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: Class A shares acquired upon settlement of phantom shares granted under Hess Midstream's 2017 Long Term Incentive Plan.

SEC source: 0000950170-25-037241 · ownership.xml · nonDerivative · entry 1

Gatling John A. · CIK 0001702312 · President and COO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 59,218

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: Class A shares acquired upon settlement of phantom shares granted under Hess Midstream's 2017 Long Term Incentive Plan.

SEC source: 0000950170-25-023201 · ownership.xml · derivative · entry 5

BlackRock Portfolio Management LLC · CIK 0002052113 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 17,686,403

Underlying: Class A Shares · 1,650,000 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F4 · derivative.exercise_price: The Opco Class B Units may be converted at any time into Class A Shares on a one-to-one basis and have no expiration date.

F4 · derivative.exercise_date: The Opco Class B Units may be converted at any time into Class A Shares on a one-to-one basis and have no expiration date.

F4 · derivative.expiration_date: The Opco Class B Units may be converted at any time into Class A Shares on a one-to-one basis and have no expiration date.

F3 · ownership.nature: Represents securities held by Blue Holding. Global Infrastructure Investors II, LLC is the sole general partner of Global Infrastructure GP II, L.P., which is the sole member of GIP Blue Holding GP, LLC, which is the general partner of Blue Holding. As such, each of the foregoing entities may be deemed to beneficially own the securities held of record by Blue Holding. Each such entity and BlackRock Portfolio Management LLC disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein.

SEC source: 0000950170-25-023201 · ownership.xml · nonDerivative · entry 3

BlackRock Portfolio Management LLC · CIK 0002052113 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 0

F3 · ownership.nature: Represents securities held by Blue Holding. Global Infrastructure Investors II, LLC is the sole general partner of Global Infrastructure GP II, L.P., which is the sole member of GIP Blue Holding GP, LLC, which is the general partner of Blue Holding. As such, each of the foregoing entities may be deemed to beneficially own the securities held of record by Blue Holding. Each such entity and BlackRock Portfolio Management LLC disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein.

SEC source: 0000950170-25-023201 · ownership.xml · nonDerivative · entry 2

BlackRock Portfolio Management LLC · CIK 0002052113 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 1,650,000

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · ownership.nature: Represents securities held by Blue Holding. Global Infrastructure Investors II, LLC is the sole general partner of Global Infrastructure GP II, L.P., which is the sole member of GIP Blue Holding GP, LLC, which is the general partner of Blue Holding. As such, each of the foregoing entities may be deemed to beneficially own the securities held of record by Blue Holding. Each such entity and BlackRock Portfolio Management LLC disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein.

SEC source: 0000950170-25-023201 · ownership.xml · nonDerivative · entry 1

BlackRock Portfolio Management LLC · CIK 0002052113 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 17,686,403

F1 · kind: 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.

F2 · ownership.nature: Represents securities held by Hess Midstream GP LP. Hess Infrastructure Partners GP LLC is the sole member of Hess Midstream GP LLC, which is the general partner of Hess Midstream GP LP. Hess Infrastructure Partners GP LLC is a 50/50 joint venture between Hess Investments North Dakota LLC ("HINDL") and GIP II Blue Holding, L.P. ("Blue Holding"). As such, each of the foregoing entities may be deemed to beneficially own the securities held of record by Hess Midstream GP LP. Each such entity and BlackRock Portfolio Management LLC disclaims beneficial ownership of such securities except to the extent of their pecuniary interest therein.

SEC source: 0000950170-25-023217 · ownership.xml · nonDerivative · entry 1

Hess Infrastructure Partners GP LLC · CIK 0001797016 · Director · 10% owner

Hess Midstream GP LLC · CIK 0001797015 · Director · 10% owner

Hess Midstream GP LP · CIK 0001797014 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 35,372,806

F1 · kind: Reflects (i) the cancellation for no consideration of 1,650,000 Class B Shares in connection with the conversion of the Opco Class B Units into Class A Shares and (ii) the transfer of 1,650,000 Class B Shares from Hess Midstream GP LP to Hess Investments North Dakota LLC for no consideration.

F2 · ownership.nature: Represents securities held by Hess Midstream GP LP. Hess Infrastructure Partners GP LLC is the sole member of Hess Midstream GP LLC, which is the general partner of Hess Midstream GP LP. As such, each of the foregoing entities may be deemed to beneficially own the securities held of record by Hess Midstream GP LP.

SEC source: 0000950170-25-019938 · ownership.xml · derivative · entry 5

BlackRock Portfolio Management LLC · CIK 0002052113 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 19,336,403

Underlying: Class A Shares · 11,000,000 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F4 · derivative.exercise_price: The Opco Class B Units may be converted at any time into Class A Shares on a one-to-one basis and have no expiration date.

F4 · derivative.exercise_date: The Opco Class B Units may be converted at any time into Class A Shares on a one-to-one basis and have no expiration date.

F4 · derivative.expiration_date: The Opco Class B Units may be converted at any time into Class A Shares on a one-to-one basis and have no expiration date.

F3 · ownership.nature: Represents securities held by Blue Holding. Global Infrastructure Investors II, LLC is the sole general partner of Global Infrastructure GP II, L.P., which is the sole member of GIP Blue Holding GP, LLC, which is the general partner of Blue Holding. As such, each of the foregoing entities may be deemed to beneficially own the securities held of record by Blue Holding. Each such entity and BlackRock Portfolio Management LLC disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein.

SEC source: 0000950170-25-019938 · ownership.xml · nonDerivative · entry 3

BlackRock Portfolio Management LLC · CIK 0002052113 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 0

F3 · ownership.nature: Represents securities held by Blue Holding. Global Infrastructure Investors II, LLC is the sole general partner of Global Infrastructure GP II, L.P., which is the sole member of GIP Blue Holding GP, LLC, which is the general partner of Blue Holding. As such, each of the foregoing entities may be deemed to beneficially own the securities held of record by Blue Holding. Each such entity and BlackRock Portfolio Management LLC disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein.

SEC source: 0000950170-25-019938 · ownership.xml · nonDerivative · entry 2

BlackRock Portfolio Management LLC · CIK 0002052113 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 11,000,000

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · ownership.nature: Represents securities held by Blue Holding. Global Infrastructure Investors II, LLC is the sole general partner of Global Infrastructure GP II, L.P., which is the sole member of GIP Blue Holding GP, LLC, which is the general partner of Blue Holding. As such, each of the foregoing entities may be deemed to beneficially own the securities held of record by Blue Holding. Each such entity and BlackRock Portfolio Management LLC disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein.

SEC source: 0000950170-25-019938 · ownership.xml · nonDerivative · entry 1

BlackRock Portfolio Management LLC · CIK 0002052113 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 19,336,403

F1 · kind: 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.

F2 · ownership.nature: Represents securities held by Hess Midstream GP LP. Hess Infrastructure Partners GP LLC is the sole member of Hess Midstream GP LLC, which is the general partner of Hess Midstream GP LP. Hess Infrastructure Partners GP LLC is a 50/50 joint venture between Hess Investments North Dakota LLC ("HINDL") and GIP II Blue Holding, L.P. ("Blue Holding"). As such, each of the foregoing entities may be deemed to beneficially own the securities held of record by Hess Midstream GP LP. Each such entity and BlackRock Portfolio Management LLC disclaims beneficial ownership of such securities except to the extent of their pecuniary interest therein.

SEC source: 0000950170-25-019980 · ownership.xml · nonDerivative · entry 1

Hess Infrastructure Partners GP LLC · CIK 0001797016 · Director · 10% owner

Hess Midstream GP LLC · CIK 0001797015 · Director · 10% owner

Hess Midstream GP LP · CIK 0001797014 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 38,672,806

F1 · kind: Reflects (i) the cancellation for no consideration of 11,000,000 Class B Shares in connection with the conversion of the Opco Class B Units into Class A Shares and (ii) the transfer of 11,000,000 Class B Shares from Hess Midstream GP LP to Hess Investments North Dakota LLC for no consideration.

F2 · ownership.nature: Represents securities held by Hess Midstream GP LP. Hess Infrastructure Partners GP LLC is the sole member of Hess Midstream GP LLC, which is the general partner of Hess Midstream GP LP. As such, each of the foregoing entities may be deemed to beneficially own the securities held of record by Hess Midstream GP LP.

SEC source: 0000950170-25-005944 · ownership.xml · derivative · entry 4

HESS CORP · CIK 0000004447 · Director · 10% owner

Hess Investments North Dakota LLC · CIK 0001702361 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 81,018,146

Underlying: Class A Shares · 967,541 shares

Expires not disclosed

F5 · derivative.exercise_price: The Opco Class B Units may be converted at any time into Class A Shares on a one-to-one basis and have no expiration date.

F5 · derivative.exercise_date: The Opco Class B Units may be converted at any time into Class A Shares on a one-to-one basis and have no expiration date.

F5 · derivative.expiration_date: The Opco Class B Units may be converted at any time into Class A Shares on a one-to-one basis and have no expiration date.

F4 · ownership.nature: Represents securities held by HINDL. HINDL is an indirect, wholly owned subsidiary of Hess Corporation, a publicly traded company listed on the New York Stock Exchange. As a result, Hess Corporation may be deemed to beneficially own the securities held of record by HINDL and Hess Midstream GP LP. Hess Corporation disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein.

SEC source: 0000950170-25-005944 · ownership.xml · nonDerivative · entry 1

HESS CORP · CIK 0000004447 · Director · 10% owner

Hess Investments North Dakota LLC · CIK 0001702361 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 30,336,403

F1 · kind: Reflects (i) the cancellation for no consideration of 967,541 Class B Shares in connection with Hess Midstream Operations LP's repurchase of 967,541 Opco Class B Units from Hess Investments North Dakota LLC ("HINDL") and the subsequent cancellation of such Opco Class B Units, and (ii) the transfer of 637,595 Class B Shares from Hess Midstream GP LP to HINDL for no consideration.

F2 · balance_after: Reflects holdings following a transaction exempt from reporting pursuant to Rule 16a-13.

F3 · ownership.nature: Represents securities held by Hess Midstream GP LP. Hess Infrastructure Partners GP LLC is the sole member of Hess Midstream GP LLC, which is the general partner of Hess Midstream GP LP. Hess Infrastructure Partners GP LLC is a 50/50 joint venture between HINDL and GIP II Blue Holding. As such, each of the foregoing entities may be deemed to beneficially own 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.

SEC source: 0000950170-25-005939 · ownership.xml · derivative · entry 4

Global Infrastructure Investors II, LLC · CIK 0001552830 · Director · 10% owner

Global Infrastructure GP II, L.P. · CIK 0001552829 · Director · 10% owner

GIP Blue Holding GP, LLC · CIK 0001702754 · Director · 10% owner

GIP II Blue Holding, L.P. · CIK 0001877329 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 30,336,403

Underlying: Class A Shares · 1,605,136 shares

Expires not disclosed

F6 · derivative.exercise_price: The Opco Class B Units may be converted at any time into Class A Shares on a one-to-one basis and have no expiration date.

F6 · derivative.exercise_date: The Opco Class B Units may be converted at any time into Class A Shares on a one-to-one basis and have no expiration date.

F6 · derivative.expiration_date: The Opco Class B Units may be converted at any time into Class A Shares on a one-to-one basis and have no expiration date.

F5 · ownership.nature: Represents securities held by Blue Holding. Global Infrastructure Investors II, LLC is the sole general partner of Global Infrastructure GP II, L.P., which is the sole member of GIP Blue Holding GP, LLC, which is the general partner of Blue Holding. As such, each of the foregoing entities 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 its pecuniary interest therein.

SEC source: 0000950170-25-005939 · ownership.xml · nonDerivative · entry 2

Global Infrastructure Investors II, LLC · CIK 0001552830 · Director · 10% owner

Global Infrastructure GP II, L.P. · CIK 0001552829 · Director · 10% owner

GIP Blue Holding GP, LLC · CIK 0001702754 · Director · 10% owner

GIP II Blue Holding, L.P. · CIK 0001877329 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 0

F3 · kind: Reflects the cancellation for no consideration of Class B Shares in connection with Hess Midstream Operations LP's repurchase of 1,605,136 Opco Class B Units from Blue Holding and a subsequent cancellation of such Opco Class B Units.

F4 · balance_after: Reflects holdings following a transaction exempt from reporting purusuant to Rule 16a-13.

F5 · ownership.nature: Represents securities held by Blue Holding. Global Infrastructure Investors II, LLC is the sole general partner of Global Infrastructure GP II, L.P., which is the sole member of GIP Blue Holding GP, LLC, which is the general partner of Blue Holding. As such, each of the foregoing entities 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 its pecuniary interest therein.

SEC source: 0000950170-25-005939 · ownership.xml · nonDerivative · entry 1

Global Infrastructure Investors II, LLC · CIK 0001552830 · Director · 10% owner

Global Infrastructure GP II, L.P. · CIK 0001552829 · Director · 10% owner

GIP Blue Holding GP, LLC · CIK 0001702754 · Director · 10% owner

GIP II Blue Holding, L.P. · CIK 0001877329 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 30,336,403

F1 · kind: Reflects the transfer of 1,605,136 Class B Shares from Hess Midstream GP LP to GIP II Blue Holding, L.P. ("Blue Holding") for no consideration.

F2 · ownership.nature: Represents securities held by Hess Midstream GP LP. Hess Infrastructure Partners GP LLC is the sole member of Hess Midstream GP LLC, which is the general partner of Hess Midstream GP LP. Hess Infrastructure Partners GP LLC is a 50/50 joint venture between HINDL and Blue Holding. As such, each of the foregoing entities may be deemed to beneficially own 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.

SEC source: 0000950170-25-005946 · ownership.xml · nonDerivative · entry 1

Hess Infrastructure Partners GP LLC · CIK 0001797016 · Director · 10% owner

Hess Midstream GP LLC · CIK 0001797015 · Director · 10% owner

Hess Midstream GP LP · CIK 0001797014 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 60,672,806

F1 · kind: 1. Reflects (i) the cancellation for no consideration of 2,572,677 Class B Shares in connection with Hess Midstream Operations LP's repurchase of an aggregate of 2,572,677 Opco Class B Units from Hess Investments North Dakota LLC ("HINDL") and GIP II Blue Holding, L.P. and the subsequent cancellation of such Opco Class B Units and (ii) the transfer of 637,595 Class B Shares from Hess Midstream GP LP to HINDL for no consideration.

F2 · ownership.nature: 2. Represents securities held by Hess Midstream GP LP. Hess Infrastructure Partners GP LLC is the sole member of Hess Midstream GP LLC, which is the general partner of Hess Midstream GP LP. As such, each of the foregoing entities may be deemed to beneficially own the securities held of record by Hess Midstream GP LP.

SEC source: 0000950170-24-125831 · ownership.xml · nonDerivative · entry 4

Stein Jonathan C. · CIK 0001702288 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 59,945

F2 · kind: Represents shares sold to satisfy tax obligations on settlement of phantom shares.

SEC source: 0000950170-24-125831 · ownership.xml · derivative · entry 7

Stein Jonathan C. · CIK 0001702288 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Class A Shares · 7,135 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_date: The phantom shares vested on November 8, 2024 and have no expiration date.

F3 · derivative.expiration_date: The phantom shares vested on November 8, 2024 and have no expiration date.

SEC source: 0000950170-24-125831 · ownership.xml · derivative · entry 6

Stein Jonathan C. · CIK 0001702288 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Class A Shares · 5,896 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_date: The phantom shares vested on November 8, 2024 and have no expiration date.

F3 · derivative.expiration_date: The phantom shares vested on November 8, 2024 and have no expiration date.

SEC source: 0000950170-24-125831 · ownership.xml · derivative · entry 5

Stein Jonathan C. · CIK 0001702288 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Class A Shares · 2,486 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_date: The phantom shares vested on November 8, 2024 and have no expiration date.

F3 · derivative.expiration_date: The phantom shares vested on November 8, 2024 and have no expiration date.

SEC source: 0000950170-24-125831 · ownership.xml · nonDerivative · entry 3

Stein Jonathan C. · CIK 0001702288 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 67,868

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: Class A shares acquired upon settlement of phantom shares granted under Hess Midstream's 2017 Long Term Incentive Plan.

SEC source: 0000950170-24-125831 · ownership.xml · nonDerivative · entry 2

Stein Jonathan C. · CIK 0001702288 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 60,733

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: Class A shares acquired upon settlement of phantom shares granted under Hess Midstream's 2017 Long Term Incentive Plan.

SEC source: 0000950170-24-125831 · ownership.xml · nonDerivative · entry 1

Stein Jonathan C. · CIK 0001702288 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 54,837

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: Class A shares acquired upon settlement of phantom shares granted under Hess Midstream's 2017 Long Term Incentive Plan.

SEC source: 0000950170-24-108487 · ownership.xml · derivative · entry 5

Global Infrastructure Investors II, LLC · CIK 0001552830 · Director · 10% owner

Global Infrastructure GP II, L.P. · CIK 0001552829 · Director · 10% owner

GIP Blue Holding GP, LLC · CIK 0001702754 · Director · 10% owner

GIP II Blue Holding, L.P. · CIK 0001877329 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 31,941,539

Underlying: Class A Shares · 12,650,000 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F4 · derivative.exercise_price: The Opco Class B Units may be converted at any time into Class A Shares on a one-to-one basis and have no expiration date.

F4 · derivative.exercise_date: The Opco Class B Units may be converted at any time into Class A Shares on a one-to-one basis and have no expiration date.

F4 · derivative.expiration_date: The Opco Class B Units may be converted at any time into Class A Shares on a one-to-one basis and have no expiration date.

F3 · ownership.nature: Represents securities held by Blue Holding. Global Infrastructure Investors II, LLC is the sole general partner of Global Infrastructure GP II, L.P., which is the sole member of GIP Blue Holding GP, LLC, which is the general partner of Blue Holding. As such, each of the foregoing entities 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 its pecuniary interest therein.

SEC source: 0000950170-24-108487 · ownership.xml · nonDerivative · entry 3

Global Infrastructure Investors II, LLC · CIK 0001552830 · Director · 10% owner

Global Infrastructure GP II, L.P. · CIK 0001552829 · Director · 10% owner

GIP Blue Holding GP, LLC · CIK 0001702754 · Director · 10% owner

GIP II Blue Holding, L.P. · CIK 0001877329 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 0

F3 · ownership.nature: Represents securities held by Blue Holding. Global Infrastructure Investors II, LLC is the sole general partner of Global Infrastructure GP II, L.P., which is the sole member of GIP Blue Holding GP, LLC, which is the general partner of Blue Holding. As such, each of the foregoing entities 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 its pecuniary interest therein.

SEC source: 0000950170-24-108487 · ownership.xml · nonDerivative · entry 2

Global Infrastructure Investors II, LLC · CIK 0001552830 · Director · 10% owner

Global Infrastructure GP II, L.P. · CIK 0001552829 · Director · 10% owner

GIP Blue Holding GP, LLC · CIK 0001702754 · Director · 10% owner

GIP II Blue Holding, L.P. · CIK 0001877329 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 12,650,000

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · ownership.nature: Represents securities held by Blue Holding. Global Infrastructure Investors II, LLC is the sole general partner of Global Infrastructure GP II, L.P., which is the sole member of GIP Blue Holding GP, LLC, which is the general partner of Blue Holding. As such, each of the foregoing entities 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 its pecuniary interest therein.

SEC source: 0000950170-24-108487 · ownership.xml · nonDerivative · entry 1

Global Infrastructure Investors II, LLC · CIK 0001552830 · Director · 10% owner

Global Infrastructure GP II, L.P. · CIK 0001552829 · Director · 10% owner

GIP Blue Holding GP, LLC · CIK 0001702754 · Director · 10% owner

GIP II Blue Holding, L.P. · CIK 0001877329 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 31,941,539

F1 · kind: 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.

F2 · ownership.nature: Represents securities held by Hess Midstream GP LP. Hess Infrastructure Partners GP LLC is the sole member of Hess Midstream GP LLC, which is the general partner of Hess Midstream GP LP. Hess Infrastructure Partners GP LLC is a 50/50 joint venture between Hess Investments North Dakota LLC ("HINDL") and GIP II Blue Holding, L.P. ("Blue Holding"). As such, each of the foregoing entities may be deemed to beneficially own 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.

SEC source: 0000950170-24-108495 · ownership.xml · nonDerivative · entry 1

Hess Infrastructure Partners GP LLC · CIK 0001797016 · Director · 10% owner

Hess Midstream GP LLC · CIK 0001797015 · Director · 10% owner

Hess Midstream GP LP · CIK 0001797014 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 63,883,078

F1 · kind: Reflects (i) the cancellation for no consideration of 12,650,000 Class B Shares in connection with the conversion of the Opco Class B Units into Class A Shares and (ii) the transfer of 12,650,000 Class B Shares from Hess Midstream GP LP to Hess Investments North Dakota LLC for no consideration.

F2 · ownership.nature: Represents securities held by Hess Midstream GP LP. Hess Infrastructure Partners GP LLC is the sole member of Hess Midstream GP LLC, which is the general partner of Hess Midstream GP LP. As such, each of the foregoing entities may be deemed to beneficially own the securities held of record by Hess Midstream GP LP.

SEC source: 0000950170-24-105577 · ownership.xml · derivative · entry 4

HESS CORP · CIK 0000004447 · Director · 10% owner

Hess Investments North Dakota LLC · CIK 0001702361 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 81,985,687

Underlying: Class A Shares · 1,061,782 shares

Expires not disclosed

F5 · derivative.exercise_price: The Opco Class B Units may be converted at any time into Class A Shares on a one-to-one basis and have no expiration date.

F5 · derivative.exercise_date: The Opco Class B Units may be converted at any time into Class A Shares on a one-to-one basis and have no expiration date.

F5 · derivative.expiration_date: The Opco Class B Units may be converted at any time into Class A Shares on a one-to-one basis and have no expiration date.

F4 · ownership.nature: Represents securities held by HINDL. HINDL is an indirect, wholly owned subsidiary of Hess Corporation, a publicly traded company listed on the New York Stock Exchange. As a result, Hess Corporation may be deemed to beneficially own the securities held of record by HINDL and Hess Midstream GP LP. Hess Corporation disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein.

SEC source: 0000950170-24-105577 · ownership.xml · nonDerivative · entry 1

HESS CORP · CIK 0000004447 · Director · 10% owner

Hess Investments North Dakota LLC · CIK 0001702361 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 44,591,539

F1 · kind: Reflects (i) the cancellation for no consideration of 1,061,782 Class B Shares in connection with Hess Midstream Operations LP's repurchase of 1,061,782 Opco Class B Units from Hess Investments North Dakota LLC ("HINDL") and the subsequent cancellation of such Opco Class B Units, and (ii) the transfer of 699,698 Class B Shares from Hess Midstream GP LP to HINDL for no consideration.

F2 · balance_after: Reflects holdings following a transaction exempt from reporting purusuant to Rule 16a-13.

F3 · ownership.nature: Represents securities held by Hess Midstream GP LP. Hess Infrastructure Partners GP LLC is the sole member of Hess Midstream GP LLC, which is the general partner of Hess Midstream GP LP. Hess Infrastructure Partners GP LLC is a 50/50 joint venture between HINDL and Blue Holding. As such, each of the foregoing entities may be deemed to beneficially own 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.

SEC source: 0000950170-24-105564 · ownership.xml · derivative · entry 4

Global Infrastructure Investors II, LLC · CIK 0001552830 · Director · 10% owner

Global Infrastructure GP II, L.P. · CIK 0001552829 · Director · 10% owner

GIP Blue Holding GP, LLC · CIK 0001702754 · Director · 10% owner

GIP II Blue Holding, L.P. · CIK 0001877329 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 44,591,539

Underlying: Class A Shares · 1,761,480 shares

Expires not disclosed

F6 · derivative.exercise_price: The Opco Class B Units may be converted at any time into Class A Shares on a one-to-one basis and have no expiration date.

F6 · derivative.exercise_date: The Opco Class B Units may be converted at any time into Class A Shares on a one-to-one basis and have no expiration date.

F6 · derivative.expiration_date: The Opco Class B Units may be converted at any time into Class A Shares on a one-to-one basis and have no expiration date.

F5 · ownership.nature: Represents securities held by Blue Holding. Global Infrastructure Investors II, LLC is the sole general partner of Global Infrastructure GP II, L.P., which is the sole member of GIP Blue Holding GP, LLC, which is the general partner of Blue Holding. As such, each of the foregoing entities 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 its pecuniary interest therein.

SEC source: 0000950170-24-105564 · ownership.xml · nonDerivative · entry 2

Global Infrastructure Investors II, LLC · CIK 0001552830 · Director · 10% owner

Global Infrastructure GP II, L.P. · CIK 0001552829 · Director · 10% owner

GIP Blue Holding GP, LLC · CIK 0001702754 · Director · 10% owner

GIP II Blue Holding, L.P. · CIK 0001877329 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 0

F3 · kind: Reflects the cancellation for no consideration of Class B Shares in connection with Hess Midstream Operations LP's repurchase of 1,761,480 Opco Class B Units from Blue Holding and a subsequent cancellation of such Opco Class B Units.

F4 · balance_after: Reflects holdings following a transaction exempt from reporting purusuant to Rule 16a-13.

F5 · ownership.nature: Represents securities held by Blue Holding. Global Infrastructure Investors II, LLC is the sole general partner of Global Infrastructure GP II, L.P., which is the sole member of GIP Blue Holding GP, LLC, which is the general partner of Blue Holding. As such, each of the foregoing entities 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 its pecuniary interest therein.

SEC source: 0000950170-24-105564 · ownership.xml · nonDerivative · entry 1

Global Infrastructure Investors II, LLC · CIK 0001552830 · Director · 10% owner

Global Infrastructure GP II, L.P. · CIK 0001552829 · Director · 10% owner

GIP Blue Holding GP, LLC · CIK 0001702754 · Director · 10% owner

GIP II Blue Holding, L.P. · CIK 0001877329 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 44,591,539

F1 · kind: Reflects the transfer of 1,761,480 Class B Shares from Hess Midstream GP LP to GIP II Blue Holding, L.P. ("Blue Holding") for no consideration.

F2 · ownership.nature: Represents securities held by Hess Midstream GP LP. Hess Infrastructure Partners GP LLC is the sole member of Hess Midstream GP LLC, which is the general partner of Hess Midstream GP LP. Hess Infrastructure Partners GP LLC is a 50/50 joint venture between HINDL and Blue Holding. As such, each of the foregoing entities may be deemed to beneficially own 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.

SEC source: 0000950170-24-105569 · ownership.xml · nonDerivative · entry 1

Hess Infrastructure Partners GP LLC · CIK 0001797016 · Director · 10% owner

Hess Midstream GP LLC · CIK 0001797015 · Director · 10% owner

Hess Midstream GP LP · CIK 0001797014 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 89,183,078

F1 · kind: Reflects (i) the cancellation for no consideration of 2,823,262 Class B Shares in connection with Hess Midstream Operations LP's repurchase of an aggregate of 2,823,262 Opco Class B Units from Hess Investments North Dakota LLC ("HINDL") and GIP II Blue Holding, L.P. and the subsequent cancellation of such Opco Class B Units and (ii) the transfer of 699,698 Class B Shares from Hess Midstream GP LP to HINDL for no consideration.

F2 · ownership.nature: Represents securities held by Hess Midstream GP LP. Hess Infrastructure Partners GP LLC is the sole member of Hess Midstream GP LLC, which is the general partner of Hess Midstream GP LP. As such, each of the foregoing entities may be deemed to beneficially own the securities held of record by Hess Midstream GP LP.

SEC source: 0000950170-24-078081 · ownership.xml · derivative · entry 4

HESS CORP · CIK 0000004447 · Director · 10% owner

Hess Investments North Dakota LLC · CIK 0001702361 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 83,047,469

Underlying: Class A Shares · 1,024,471 shares

Expires not disclosed

F5 · derivative.exercise_price: The Opco Class B Units may be converted at any time into Class A Shares on a one-to-one basis and have no expiration date.

F5 · derivative.exercise_date: The Opco Class B Units may be converted at any time into Class A Shares on a one-to-one basis and have no expiration date.

F5 · derivative.expiration_date: The Opco Class B Units may be converted at any time into Class A Shares on a one-to-one basis and have no expiration date.

F4 · ownership.nature: Represents securities held by HINDL. HINDL is an indirect, wholly owned subsidiary of Hess Corporation, a publicly traded company listed on the New York Stock Exchange. As a result, Hess Corporation may be deemed to beneficially own the securities held of record by HINDL and Hess Midstream GP LP. Hess Corporation disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein.

SEC source: 0000950170-24-078081 · ownership.xml · nonDerivative · entry 1

HESS CORP · CIK 0000004447 · Director · 10% owner

Hess Investments North Dakota LLC · CIK 0001702361 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 46,353,019

F1 · kind: Reflects (i) the cancellation for no consideration of 1,024,471 Class B Shares in connection with Hess Midstream Operations LP's repurchase of 1,024,471 Opco Class B Units from Hess Investments North Dakota LLC ("HINDL") and the subsequent cancellation of such Opco Class B Units, and (ii) the transfer of 675,110 Class B Shares from Hess Midstream GP LP to HINDL for no consideration.

F2 · balance_after: Reflects holdings following a transaction exempt from reporting purusuant to Rule 16a-13.

F3 · ownership.nature: Represents securities held by Hess Midstream GP LP. Hess Infrastructure Partners GP LLC is the sole member of Hess Midstream GP LLC, which is the general partner of Hess Midstream GP LP. Hess Infrastructure Partners GP LLC is a 50/50 joint venture between HINDL and Blue Holding. As such, each of the foregoing entities may be deemed to beneficially own 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.

SEC source: 0000950170-24-078070 · ownership.xml · derivative · entry 4

Global Infrastructure Investors II, LLC · CIK 0001552830 · Director · 10% owner

Global Infrastructure GP II, L.P. · CIK 0001552829 · Director · 10% owner

GIP Blue Holding GP, LLC · CIK 0001702754 · Director · 10% owner

GIP II Blue Holding, L.P. · CIK 0001877329 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 46,353,019

Underlying: Class A Shares · 1,699,581 shares

Expires not disclosed

F6 · derivative.exercise_price: The Opco Class B Units may be converted at any time into Class A Shares on a one-to-one basis and have no expiration date.

F6 · derivative.exercise_date: The Opco Class B Units may be converted at any time into Class A Shares on a one-to-one basis and have no expiration date.

F6 · derivative.expiration_date: The Opco Class B Units may be converted at any time into Class A Shares on a one-to-one basis and have no expiration date.

F5 · ownership.nature: Represents securities held by Blue Holding. Global Infrastructure Investors II, LLC is the sole general partner of Global Infrastructure GP II, L.P., which is the sole member of GIP Blue Holding GP, LLC, which is the general partner of Blue Holding. As such, each of the foregoing entities 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 its pecuniary interest therein.

SEC source: 0000950170-24-078070 · ownership.xml · nonDerivative · entry 2

Global Infrastructure Investors II, LLC · CIK 0001552830 · Director · 10% owner

Global Infrastructure GP II, L.P. · CIK 0001552829 · Director · 10% owner

GIP Blue Holding GP, LLC · CIK 0001702754 · Director · 10% owner

GIP II Blue Holding, L.P. · CIK 0001877329 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 0

F3 · kind: Reflects the cancellation for no consideration of Class B Shares in connection with Hess Midstream Operations LP's repurchase of 1,699,581 Opco Class B Units from Blue Holding and a subsequent cancellation of such Opco Class B Units.

F4 · balance_after: Reflects holdings following a transaction exempt from reporting purusuant to Rule 16a-13.

F5 · ownership.nature: Represents securities held by Blue Holding. Global Infrastructure Investors II, LLC is the sole general partner of Global Infrastructure GP II, L.P., which is the sole member of GIP Blue Holding GP, LLC, which is the general partner of Blue Holding. As such, each of the foregoing entities 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 its pecuniary interest therein.