Common use of FORM OF NOTATION OF GUARANTEE Clause in Contracts

FORM OF NOTATION OF GUARANTEE. For value received, the undersigned Guarantor (which term includes any successor Person under the Indenture hereinafter referred to) has unconditionally guaranteed to the extent set forth in, and subject to the provisions of, an indenture dated as of September 16, 2011 (the “Base Indenture”), as amended by the Eleventh Supplemental Indenture, dated as of August 20, 2025 (the “Eleventh Supplemental Indenture” and, together with the Base Indenture, and as the Base Indenture and the Eleventh Supplemental Indenture may be further amended and supplemented from time to time, the “Indenture”) among CubeSmart, L.P. (the “Issuer”), the Parent Guarantor named therein and U.S. Bank Trust Company, National Association, as trustee (the “Trustee”), providing for the issuance of the 5.125% Senior Notes due 2035 described therein, the due and punctual payment of the principal of and interest on the Notes to which this notation is affixed and all other amounts due and payable under the Indenture and the Notes to which this notation is affixed by the Issuer. The obligations of such Guarantor to the Holders of Notes to which this notation is affixed and to the Trustee pursuant to the Guarantee and the Indenture are expressly set forth in Article Fourteen of the Base Indenture and reference is hereby made to the Indenture for the precise terms of the Guarantee. CUBESMART By: Name: Title: To assign this Note, fill in the form below:

FORM OF NOTATION OF GUARANTEE. For value received, the undersigned Guarantor (which term includes any successor Person under the Indenture hereinafter referred to) has unconditionally guaranteed to the extent set forth in, and subject to the provisions of, an indenture dated as of September 16June 20, 2011 2016 (the “Base Indenture”), as amended by the Eleventh Fifth Supplemental Indenture, dated as of August 20October 7, 2025 2021 (the “Eleventh Fifth Supplemental Indenture” and, together with the Base Indenture, and as the Base Indenture and the Eleventh Fifth Supplemental Indenture may be further amended and supplemented from time to time, the “Indenture”) among CubeSmart, L.P. Life Storage LP (the “Issuer”), the Parent Guarantor named therein and U.S. Bank Trust Company▇▇▇▇▇ Fargo Bank, National Association, as trustee (the “Trustee”), providing for the issuance of the 5.1252.400% Senior Notes due 2035 described therein2031, the due and punctual payment of the principal of and interest on the Notes to which this notation is affixed and all other amounts due and payable under the Indenture and the Notes to which this notation is affixed by the Issuer. The obligations of such Guarantor to the Holders of Notes to which this notation is affixed and to the Trustee pursuant to the Guarantee and the Indenture are expressly set forth in Article Fourteen of the Base Indenture and reference is hereby made to the Indenture for the precise terms of the Guarantee. CUBESMART LIFE STORAGE, INC. By: Name: Title: To assign this Note, fill in the form below:

FORM OF NOTATION OF GUARANTEE. For value received, the undersigned Guarantor (which term includes any successor Person under the Indenture hereinafter referred to) has unconditionally guaranteed to the extent set forth in, and subject to the provisions of, an indenture dated as of September 16, 2011 (the “Base Indenture”), as amended by the Eleventh Ninth Supplemental Indenture, dated as of August 20November 30, 2025 2021 (the “Eleventh Ninth Supplemental Indenture” and, together with the Base Indenture, and as the Base Indenture and the Eleventh Ninth Supplemental Indenture may be further amended and supplemented from time to time, the “Indenture”) among CubeSmart, L.P. (the “Issuer”), the Parent Guarantor named therein and U.S. Bank Trust Company, National Association, as trustee (the “Trustee”), providing for the issuance of the 5.125% Senior 2028 Notes due 2035 and 2032 Notes described therein, the due and punctual payment of the principal of and interest on the Notes to which this notation is affixed and all other amounts due and payable under the Indenture and the Notes to which this notation is affixed by the Issuer. The obligations of such Guarantor to the Holders of Notes to which this notation is affixed and to the Trustee pursuant to the Guarantee and the Indenture are expressly set forth in Article Fourteen of the Base Indenture and reference is hereby made to the Indenture for the precise terms of the Guarantee. CUBESMART By: Name: Title: To assign this Note, fill in the form below:

FORM OF NOTATION OF GUARANTEE. For value received, the undersigned Guarantor (which term includes any successor Person under the Indenture hereinafter referred to) has unconditionally guaranteed to the extent set forth in, and subject to the provisions of, an indenture dated as of September 16June 20, 2011 2016 (the “Base Indenture”), as amended by the Eleventh First Supplemental Indenture, dated as of August June 20, 2025 2016 (the “Eleventh First Supplemental Indenture” and, together with the Base Indenture, and as the Base Indenture and the Eleventh First Supplemental Indenture may be further amended and supplemented from time to time, the “Indenture”) among CubeSmart, L.P. Sovran Acquisition Limited Partnership (the “Issuer”), the Parent Guarantor named therein and U.S. Bank Trust Company▇▇▇▇▇ Fargo Bank, National Association, as trustee (the “Trustee”), providing for the issuance of the 5.1253.500% Senior Notes due 2035 described therein2026, the due and punctual payment of the principal of and interest on the Notes to which this notation is affixed and all other amounts due and payable under the Indenture and the Notes to which this notation is affixed by the Issuer. The obligations of such Guarantor to the Holders of Notes to which this notation is affixed and to the Trustee pursuant to the Guarantee and the Indenture are expressly set forth in Article Fourteen of the Base Indenture and reference is hereby made to the Indenture for the precise terms of the Guarantee. CUBESMART SOVRAN SELF STORAGE INC. By: Name: Title: To assign this Note, fill in the form below:

FORM OF NOTATION OF GUARANTEE. For value received, the undersigned Guarantor (which term includes any successor Person under the Indenture hereinafter referred to) has unconditionally guaranteed to the extent set forth in, and subject to the provisions of, an indenture dated as of September 16June 20, 2011 2016 (the “Base Indenture”), as amended by the Eleventh Third Supplemental Indenture, dated as of August 20June 3, 2025 2019 (the “Eleventh Third Supplemental Indenture” and, together with the Base Indenture, and as the Base Indenture and the Eleventh Third Supplemental Indenture may be further amended and supplemented from time to time, the “Indenture”) among CubeSmart, L.P. Life Storage LP (the “Issuer”), the Parent Guarantor named therein and U.S. Bank Trust Company▇▇▇▇▇ Fargo Bank, National Association, as trustee (the “Trustee”), providing for the issuance of the 5.1254.000% Senior Notes due 2035 described therein2029, the due and punctual payment of the principal of and interest on the Notes to which this notation is affixed and all other amounts due and payable under the Indenture and the Notes to which this notation is affixed by the Issuer. The obligations of such Guarantor to the Holders of Notes to which this notation is affixed and to the Trustee pursuant to the Guarantee and the Indenture are expressly set forth in Article Fourteen of the Base Indenture and reference is hereby made to the Indenture for the precise terms of the Guarantee. CUBESMART LIFE STORAGE, INC. By: Name: Title: To assign this Note, fill in the form below: (I) or (we) assign and transfer this Note to: and irrevocably appoint to transfer this Note on the books of the Issuer. The agent may substitute another to act for him. Date:

FORM OF NOTATION OF GUARANTEE. For value received, the undersigned Guarantor (which term includes any successor Person under the Indenture hereinafter referred to) has unconditionally guaranteed to the extent set forth in, and subject to the provisions of, an indenture dated as of September 16, 2011 (the ““ Base Indenture”), as amended by the Eleventh Seventh Supplemental Indenture, dated as of August 20October 11, 2025 2019 (the “Eleventh Seventh Supplemental Indenture” and, together with the Base Indenture, and as the Base Indenture and the Eleventh Seventh Supplemental Indenture may be further amended and supplemented from time to time, the “Indenture”) among CubeSmart, L.P. (the “Issuer”), the Parent Guarantor named therein and U.S. Bank Trust Company, National Association, as trustee (the “TrusteeTrustee ”), providing for the issuance of the 5.1253.000% Senior Notes due 2035 described therein2030, the due and punctual payment of the principal of and interest on the Notes to which this notation is affixed and all other amounts due and payable under the Indenture and the Notes to which this notation is affixed by the Issuer. The obligations of such Guarantor to the Holders of Notes to which this notation is affixed and to the Trustee pursuant to the Guarantee and the Indenture are expressly set forth in Article Fourteen of the Base Indenture and reference is hereby made to the Indenture for the precise terms of the Guarantee. CUBESMART By: Name: Title: To assign this Note, fill in the form below:

FORM OF NOTATION OF GUARANTEE. For value received, the undersigned Guarantor (which term includes any successor Person under the Indenture hereinafter referred to) has unconditionally guaranteed to the extent set forth in, and subject to the provisions of, an indenture dated as of September 16, 2011 (the “Base Indenture”), as amended by the Eleventh Eighth Supplemental Indenture, dated as of August 20October 6, 2025 2020 (the “Eleventh Eighth Supplemental Indenture” and, together with the Base Indenture, and as the Base Indenture and the Eleventh Eighth Supplemental Indenture may be further amended and supplemented from time to time, the “Indenture”) among CubeSmart, L.P. (the “Issuer”), the Parent Guarantor named therein and U.S. Bank Trust Company, National Association, as trustee (the “TrusteeTrustee ”), providing for the issuance of the 5.1252.000% Senior Notes due 2035 described therein2031, the due and punctual payment of the principal of and interest on the Notes to which this notation is affixed and all other amounts due and payable under the Indenture and the Notes to which this notation is affixed by the Issuer. The obligations of such Guarantor to the Holders of Notes to which this notation is affixed and to the Trustee pursuant to the Guarantee and the Indenture are expressly set forth in Article Fourteen of the Base Indenture and reference is hereby made to the Indenture for the precise terms of the Guarantee. CUBESMART By: Name: Title: To assign this Note, fill in the form below:

FORM OF NOTATION OF GUARANTEE. For value received, the undersigned Guarantor (which term includes any successor Person under the Indenture hereinafter referred to) has unconditionally guaranteed to the extent set forth in, and subject to the provisions of, an indenture dated as of September 16June 20, 2011 2016 (the “Base Indenture”), as amended by the Eleventh Fourth Supplemental Indenture, dated as of August 20September 23, 2025 2020 (the “Eleventh Fourth Supplemental Indenture” and, together with the Base Indenture, and as the Base Indenture and the Eleventh Fourth Supplemental Indenture may be further amended and supplemented from time to time, the “Indenture”) among CubeSmart, L.P. Life Storage LP (the “Issuer”), the Parent Guarantor named therein and U.S. Bank Trust Company▇▇▇▇▇ Fargo Bank, National Association, as trustee (the “Trustee”), providing for the issuance of the 5.1252.200% Senior Notes due 2035 described therein2030, the due and punctual payment of the principal of and interest on the Notes to which this notation is affixed and all other amounts due and payable under the Indenture and the Notes to which this notation is affixed by the Issuer. The obligations of such Guarantor to the Holders of Notes to which this notation is affixed and to the Trustee pursuant to the Guarantee and the Indenture are expressly set forth in Article Fourteen of the Base Indenture and reference is hereby made to the Indenture for the precise terms of the Guarantee. CUBESMART LIFE STORAGE, INC. By: Name: Title: To assign this Note, fill in the form below: (I) or (we) assign and transfer this Note to: and irrevocably appoint to transfer this Note on the books of the Issuer. The agent may substitute another to act for him. Date:

FORM OF NOTATION OF GUARANTEE. For value received, the undersigned Guarantor (which term includes any successor Person under the Indenture hereinafter referred to) has unconditionally guaranteed to the extent set forth in, and subject to the provisions of, an indenture dated as of September 16, 2011 (the ““ Base Indenture”), as amended by the Eleventh Sixth Supplemental Indenture, dated as of August 20January 30, 2025 2019 (the “Eleventh Sixth Supplemental Indenture” and, together with the Base Indenture, and as the Base Indenture and the Eleventh Sixth Supplemental Indenture may be further amended and supplemented from time to time, the “Indenture”) among CubeSmart, L.P. (the “Issuer”), the Parent Guarantor named therein and U.S. Bank Trust Company, National Association, as trustee (the “Trustee”Trustee “), providing for the issuance of the 5.1254.375% Senior Notes due 2035 described therein2029, the due and punctual payment of the principal of and interest on the Notes to which this notation is affixed and all other amounts due and payable under the Indenture and the Notes to which this notation is affixed by the Issuer. The obligations of such Guarantor to the Holders of Notes to which this notation is affixed and to the Trustee pursuant to the Guarantee and the Indenture are expressly set forth in Article Fourteen of the Base Indenture and reference is hereby made to the Indenture for the precise terms of the Guarantee. CUBESMART By: Name: Title: To assign this Note, fill in the form below: