Form 3 Filing by Jaime Martinez Merla

This filing reports the initial ownership of securities by Jaime Martinez Merla, Chief Comptroller of CEMEX SAB DE CV. Mr. Merla holds direct ownership of 101,925 shares of CX and 212,506 Ordinary Participation Certificates (CEMEX.CPO) traded on the BMV MEXICO exchange. The report was filed on March 17, 2026, reflecting the ownership as of the same date. No securities were acquired or disposed of in this transaction, as this is an initial filing to report holdings.