THIRD SUPPLEMENTAL INDENTURE, dated as of February 12, 2024 (this Third
Supplemental Indenture), between Spire Inc. (formerly The Laclede Group, Inc.), a corporation duly organized and existing under the laws of the State of Missouri, having its principal office at 700 Market Street, St. Louis, Missouri 63101
(the Company), and Regions Bank (as successor to UMB Bank & Trust, N.A.), as trustee (the Trustee).
WHEREAS, the Company executed and delivered the indenture, dated as of August 19, 2014, to the Trustee (the
Indenture), to provide for the issuance of the Companys debentures, notes or other evidences of indebtedness (the Securities), in one or more fully registered series;
WHEREAS, pursuant to Section 1201 of the Indenture, the Company issued, pursuant to that certain first supplemental indenture, dated as
of August 19, 2014 (the First Supplemental Indenture), (i) a series of its Securities known as its Floating Rate Senior Notes due 2017, (ii) a series of its Securities known as its 2.55% Senior Notes due 2019 and (iii) a
series of its Securities known as its 4.70% Senior Notes due 2044;
WHEREAS, pursuant to Section 1201 of the Indenture, the Company
issued, pursuant to that certain second supplemental indenture, dated as of February 27, 2017 (the Second Supplemental Indenture), a series of its Securities known as its 3.543% Senior Notes due 2024;
WHEREAS, pursuant to Section 1201 of the Indenture, the Company desires to provide for the issuance of a new series of its Securities to
be known as its 5.300% Senior Notes due 2026 (the 2026 Notes) and to establish the form of the 2026 Note thereof, as provided in Section 201 of the Indenture, and to set forth the terms thereof, as provided in
Section 301 of the Indenture;
WHEREAS, the Company has requested that the Trustee execute and deliver this Third Supplemental
Indenture; and
WHEREAS, all things necessary to make this Third Supplemental Indenture a valid agreement of the Company, in accordance
with its terms, and to make the 2026 Notes, when executed by the Company and authenticated and delivered by the Trustee, the valid obligations of the Company, have been done;
NOW THEREFORE, in consideration of the premises and the purchase and acceptance of the 2026 Notes by the Holders thereof, and for the purpose
of setting forth, as provided in the Indenture, the form and terms of the 2026 Notes, it is mutually covenanted and agreed, for the equal and proportionate benefit of all Holders of the 2026 Notes, as follows:
ARTICLE ONE
DEFINITIONS
Section 1.01. Definition of Terms. Unless the context otherwise requires:
(a) each term defined in the Indenture has the same meaning when used in this Third Supplemental Indenture;