Exhibit 21

The following is a list of subsidiaries of Eagle Materials Inc., wholly-owned unless otherwise stated. This list of subsidiaries includes all of the significant subsidiaries of Eagle Materials Inc. as of May 22, 2024.

Entity Name	Jurisdiction of Organization
AG SOUTH CAROLINA LLC	Delaware
AMERICAN GYPSUM COMPANY LLC	Delaware
AMERICAN GYPSUM MARKETING COMPANY LLC	Delaware
AUDUBON MATERIALS LLC d/b/a Central Plains Cement Company LLC	Delaware
AUDUBON READYMIX LLC d/b/a Quicksilver Readymix LLC	Delaware
CCP CEMENT LLC	Delaware
CCP CONCRETE/AGGREGATES LLC	Delaware
CCP GYPSUM LLC	Nevada
CENTEX MATERIALS LLC	Delaware
ILLINOIS CEMENT COMPANY LLC	Delaware
FAIRBORN CEMENT COMPANY LLC	Delaware
HOLLIS & EASTERN RAILROAD COMPANY LLC	Delaware
KANSAS CITY AGGREGATE LLC d/b/a Talon Concrete and Aggregates LLC	Delaware
KANSAS CITY FLY ASH LLC	Delaware
KANSAS CITY READYMIX LLC d/b/a Talon Concrete and Aggregates LLC	Delaware
KOSMOS CEMENT COMPANY LLC	Delaware
MOUNTAIN CEMENT COMPANY LLC	Delaware
MOUNTAIN LAND & CATTLE COMPANY LLC	Delaware

NEVADA CEMENT COMPANY LLC		Delaware
RAPTOR MATERIALS LLC		Delaware
REPUBLIC PAPERBOARD COMPANY LLC		Delaware
SKYWAY CEMENT COMPANY LLC		Delaware
TEXAS CEMENT COMPANY		Nevada
TEXAS LEHIGH CEMENT COMPANY LP d/b/a Texas Lehigh Cement	50%	Texas
TLCC GP LLC		Delaware
TLCC LP LLC		Delaware
TULSA CEMENT LLC d/b/a Central Plains Cement Company LLC		Delaware