This article provides an overview of the ceramic sequence of the Pacific slope of Guatemala from the perspective of compositional data generated by instrumental neutron activation analysis (INAA) of 1166 ceramic specimens from the Pacific coastal plain and Vally of Guatemala. Excluding ethnographic ceramics and raw material samples, the analyzed specimens pertain to four chronological divisions, the Early Formative, Middle through Terminal Formative, Classic, and Early Post classic periods. Differences in subgroups among the four chronological subdivisions of the sample reflect shifting ceramic resource procurement, production, and exchange.