The types of biologics and biosimilars are defined by their molecular structure and mechanism of action, shaping their market taxonomy. Primary subtypes include monoclonal antibodies (mAbs), recombinant proteins, vaccines, and cell/gene therapies. Monoclonal antibodies, such as adalimumab and trastuzumab, constitute the largest segment due to their versatility in targeting specific antigens. Recombinant proteins, including insulin and growth hormones, follow closely, driven by chronic disease prevalence. Vaccines dominate the biosimilars space, with platforms like mRNA and subunit vaccines expanding rapidly. Cell and gene therapies, though nascent, are high-growth areas, particularly in oncology and rare diseases. This segmentation directly influences pipeline diversity, with mAbs accounting for 45โ50% of global biologics pipelines, underscoring their therapeutic versatility and commercial viability. Regulatory frameworks and cost dynamics further differentiate these types, with biosimilars gaining traction in cost-sensitive markets.