BX: Material agreement · New financial obligation · Other company developments

Item 1.01 Entry into a Material Definitive Agreement. On November 2, 2026, Blackstone Inc. (“Blackstone”), Blackstone Holdings I L.P., Blackstone Holdings AI L.P., Blackstone Holdings II L.P., Blackstone Holdings III L.P. and Blackstone Holdings IV L.P., each indirect subsidiaries of Blackstone (collectively with Blackstone, the “Guarantors”), and Blackstone Reg Finance Co. L.L.C., an indirect subsidiary of Blackstone (the “Issuer”), entered into (i) a supplemental indenture (the “Fourth Supplemental Indenture”) to the indenture, dated as of December 6, 2024 (the “Base Indenture”) with The Bank of New York Mellon Trust Company, N.A., as trustee (the “Trustee”), relating to the offering by the Issuer of $600,000,000 aggregate principal amount of its 5.650% Senior Notes due 2031 (the “2031 Notes”) and (ii) a supplemental indenture (the “Fifth Supplemental Indenture” and, together with the Base Indenture and Fourth Supplemental Indenture, the “Indenture”) to the Base Indenture with the Trustee, relating to the offering by the Issuer of $500,000,000 aggregate principal amount of its 5.900% Senior Notes due 2033 (the “2033 Notes” and, together with the 2031 Notes, the “Notes”). The Notes have been registered under the Securities Act of 1933, as amended, by an automatically effective shelf registration statement on Form S-3ASR (Registration No. 333-283540) filed with the Securities and Exchange Commission on December 2, 2024, as amended on February 27, 2026 (the “Registration Statement”). The 2031 Notes bear interest at a rate of 5.650% per annum, accruing from November 2, 2026. The 2033 Notes bear interest at a rate of 5.900% per annum, accruing from November 2, 2026. Interest on the 2031 Notes is payable semiannually in arrears on May 3 and November 3 of each year, commenci