Exhibit 21

Subsidiaries of the Registrant

Name of Subsidiary			Jurisdiction of Incorporation
Amrize ACM Inc.			Delaware
Amrize Building Envelope LLC			Indiana
Amrize Canada Inc.			Canada
Amrize Cement Inc.			Delaware
Amrize Finance Switzerland LLC			Switzerland
Amrize Finance US LLC			Delaware
Amrize Great Lakes Inc.			Delaware
Amrize Holdings Switzerland LLC			Switzerland
Amrize Mid-America Inc.			Illinois
Amrize Mid-Atlantic Inc.			Maryland
Amrize Midwest Inc.			Minnesota
Amrize North America Inc.			Delaware
Amrize Northeast Inc.			Massachusetts
Amrize South Central Inc.			Texas
Amrize Southwest Inc.			Nevada
Amrize Technology Switzerland LLC			Switzerland
Amrize Trading Inc.			Florida
Amrize Ventures Switzerland LLC			Switzerland
Amrize West Central Inc.			Colorado
Geocycle Canada Inc.			Canada
Geocycle LLC			Michigan
Herbert Malarkey Roofing Company			Oregon
Innocon Partnership (55%)*			Ontario
Jamaica Aggregates Ltd. (95%)*			Jamaica
North America Shared Services S.A.S.			Colombia

*  The Registrant owns a less than 100% equity interest in the entity.

Certain subsidiaries were omitted pursuant to Item 601(b)(21)(ii) of the SEC's Regulation S-K.