North America dominates the Rituximab market with a 40% share, driven by high adoption of advanced therapies, robust R&D investments, and mature healthcare infrastructure. The region’s growth is further fueled by favorable reimbursement policies and a large patient pool for lymphoma and autoimmune diseases. Europe follows with 30%, supported by strong regulatory frameworks, expanding biosimilar competition, and aging demographics increasing demand. Asia Pacific, the fastest-growing region, is projected to capture 20% by 2028, propelled by rising awareness, government-funded healthcare initiatives, and a growing biologics manufacturing ecosystem. Latin America (5%) and the Middle East & Africa (5%) lag due to fragmented healthcare systems but show potential through partnerships and affordability programs.