SCHEDULE 13G 0001456075 XXXXXXXX LIVE Class A shares representing limited partner interests 02/09/2026 0001789832 Hess Midstream LP 428103105 1501 Mckinney Street Houston TX 77010 Rule 13d-1(c) Harvest Fund Advisors LLC b DE 6528473.00 0.00 6528473.00 0.00 6528473.00 N 5.1 OO Harvest Fund Holdco L.P. b DE 6528473.00 0.00 6528473.00 0.00 6528473.00 N 5.1 PN Blackstone Harvest Holdco L.L.C. b DE 6528473.00 0.00 6528473.00 0.00 6528473.00 N 5.1 OO Blackstone Intermediary Holdco L.L.C. b DE 6528473.00 0.00 6528473.00 0.00 6528473.00 N 5.1 OO Blackstone Securities Partners L.P. b DE 6528473.00 0.00 6528473.00 0.00 6528473.00 N 5.1 PN Blackstone Advisory Services L.L.C. b DE 6528473.00 0.00 6528473.00 0.00 6528473.00 N 5.1 OO Blackstone Holdings I L.P. b DE 6528473.00 0.00 6528473.00 0.00 6528473.00 N 5.1 PN Blackstone Holdings I/II GP L.L.C. b DE 6528473.00 0.00 6528473.00 0.00 6528473.00 N 5.1 OO Blackstone Inc. b DE 6528473.00 0.00 6528473.00 0.00 6528473.00 N 5.1 CO Blackstone Group Management L.L.C. b DE 6528473.00 0.00 6528473.00 0.00 6528473.00 N 5.1 OO Stephen A. Schwarzman b DE 6528473.00 0.00 6528473.00 0.00 6528473.00 N 5.1 IN Hess Midstream LP 1501 Mckinney Street, Houston, Texas 77010 See Item 2(c) below. See Item 2(c) below. Each of the following is hereinafter individually referred to as a "Reporting Person" and collectively as the "Reporting Persons." This statement is filed on behalf of: (i) Harvest Fund Advisors LLC ("HFA") 100 W. Lancaster Avenue, Suite 200 Wayne, PA 19087 Citizenship: Delaware (ii) Harvest Fund Holdco L.P. c/o Blackstone Inc. 345 Park Avenue New York, NY 10154 Citizenship: Delaware (iii) Blackstone Harvest Holdco L.L.C. c/o Blackstone Inc. 345 Park Avenue New York, NY 10154 Citizenship: Delaware (iv) Blackstone Intermediary Holdco L.L.C. c/o Blackstone Inc. 345 Park Avenue New York, NY 10154 Citizenship: Delaware (v) Blackstone Securities Partners L.P. c/o Blackstone Inc. 345 Park Avenue New York, NY 10154 Citizenship: Delaware (vi) Blackstone Advisory Services L.L.C. c/o Blackstone Inc. 345 Park Avenue New York, NY 10154 Citizenship: Delaware (vii) Blackstone Holdings I L.P. c/o Blackstone Inc. 345 Park Avenue New York, NY 10154 Citizenship: Delaware (viii) Blackstone Holdings I/II GP L.L.C. c/o Blackstone Inc. 345 Park Avenue New York, NY 10154 Citizenship: Delaware (ix) Blackstone Inc. 345 Park Avenue New York, NY 10154 Citizenship: Delaware (x) Blackstone Group Management L.L.C. c/o Blackstone Inc. 345 Park Avenue New York, NY 10154 Citizenship: Delaware (xi) Stephen A. Schwarzman. c/o Blackstone Inc. 345 Park Avenue New York, NY 10154 Citizen: United States Y As of February 9, 2026, HFA may be deemed to beneficially own 6,528,473 Class A shares ("Class A Shares") representing limited partner interests of Hess Midstream LP (the "Issuer") held by funds and accounts managed by HFA. Harvest Fund Holdco L.P. is the sole member of HFA. Blackstone Harvest Holdco L.L.C. is the general partner of Harvest Fund Holdco L.P. Blackstone Intermediary Holdco L.L.C. is the sole member of Blackstone Harvest Holdco L.L.C. Blackstone Securities Partners L.P. is the sole member of Blackstone Intermediary Holdco L.L.C. Blackstone Advisory Services L.L.C. is the general partner of Blackstone Securities Partners L.P. Blackstone Holdings I L.P. is the sole member of Blackstone Advisory Services L.L.C. Blackstone Holdings I/II GP L.L.C. is the general partner of Blackstone Holdings I L.P. Blackstone Inc. is the sole member of Blackstone Holdings I/II GP L.L.C. The sole holder of the Class C common stock of Blackstone Inc. is Blackstone Group Management L.L.C. Blackstone Group Management L.L.C. is wholly-owned by Blackstone's senior managing directors and controlled by its founder, Stephen A. Schwarzman. Each Reporting Person may be deemed to beneficially own the securities of the Issuer beneficially owned by entities directly or indirectly controlled by it or him, but each disclaims beneficial ownership of the securities reported herein, and this report shall not be deemed an admission that any of the Reporting Persons is the beneficial owner of such securities for purposes of Section 13(d) of the Act or any other purpose. Calculations of the percentage of shares of Class A Shares beneficially owned are based on 129,392,378 Class A Shares outstanding as of October 31, 2025 as disclosed by the Issuer in its Quarterly Report on Form 10-Q, filed with the Securities and Exchange Commission on November 6, 2025. Each of the Reporting Persons may be deemed to be the beneficial owner of the Class A Shares listed on such Reporting Person's cover page. See each cover page hereof. See each cover page hereof. See each cover page hereof. See each cover page hereof. See each cover page hereof. Y Y Y Y Y N Each of the Reporting Persons hereby makes the following certification: By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11. Exhibit 99.1 Signatures (filed herewith). Exhibit 99.2 Joint Filing Agreement Harvest Fund Advisors LLC /s/ Anthony Merhige 02/17/2026 Harvest Fund Holdco L.P. /s/ Marisa Beeney 02/17/2026 Blackstone Harvest Holdco L.L.C. /s/ Marisa Beeney 02/17/2026 Blackstone Intermediary Holdco L.L.C. /s/ Evan Clandorf 02/17/2026 Blackstone Securities Partners L.P. /s/ Evan Clandorf 02/17/2026 Blackstone Advisory Services L.L.C. /s/ Evan Clandorf 02/17/2026 Blackstone Holdings I L.P. /s/ Victoria Portnoy 02/17/2026 Blackstone Holdings I/II GP L.L.C. /s/ Victoria Portnoy 02/17/2026 Blackstone Inc. /s/ Victoria Portnoy 02/17/2026 Blackstone Group Management L.L.C. /s/ Victoria Portnoy 02/17/2026 Stephen A. Schwarzman /s/ Stephen A. Schwarzman 02/17/2026