Within the FCC Additives market, application‑based segmentation delineates three primary end‑use categories: Catalytic Cracking, Hydrocracking, and Petrochemical Feedstock Enhancement. Catalytic Cracking accounts for the largest share, roughly 55 % of total revenue, because fluid catalytic cracking units dominate global refinery capacity and rely heavily on additive packages to maintain catalyst activity, mitigate coke formation, and extend cycle length. Hydrocracking, representing about 25 % of the market, utilizes additives to control hydrogen consumption, improve selectivity toward middle‑distillate products, and protect metal surfaces under high‑pressure conditions. The remaining 20 % pertains to petrochemical feedstock enhancement, where additives are employed to adjust feed composition, suppress contaminants, and optimize downstream polymerization processes. This application‑centric taxonomy clarifies how each segment contributes to overall market size, enabling stakeholders to allocate R&D and commercial resources proportionally. The FCC Additives segmentation thus reflects operational priorities across refining and petrochemical complexes, driving differentiated demand patterns.