Segmentation by type classifies monoclonal antibodies and reagents into murine, chimeric, humanized, and fully human formats, each reflecting distinct engineering strategies and cost structures. Murine antibodies, the earliest generation, now occupy a modest share—approximately 10 %—due to immunogenicity concerns that limit clinical translation, yet they remain valuable for initial target discovery. Chimeric constructs, combining mouse variable regions with human constant domains, capture around 20 % of the market, offering improved efficacy while retaining manageable production costs for pre‑clinical studies. Humanized antibodies, engineered to retain mouse antigen‑binding sites within a predominantly human framework, command roughly 30 % of revenue, balancing reduced immunogenicity with scalable manufacturing. Fully human antibodies, derived from transgenic mice or phage display libraries, dominate with an estimated 40 % share, driven by their superior safety profile and regulatory preference for therapeutic development. This type‑based taxonomy clarifies how innovation pathways and pricing pressures allocate market value across the product spectrum.