The type segmentation distinguishes service models offered by CDMOs: Contract Development, Contract Manufacturing, and Full‑Service CDMO. Contract Development, encompassing cell‑line engineering, process optimization, and analytical method development, captures roughly 35 % of revenue, as sponsors increasingly outsource early‑stage R&D to accelerate timelines. Contract Manufacturing, which includes scale‑up, cGMP production, and fill‑finish, represents the largest slice at about 45 %, reflecting the capital‑intensive nature of biologics production and the need for flexible capacity. The Full‑Service CDMO model integrates both development and manufacturing under a single contractual umbrella, accounting for the remaining 20 % and appealing to clients seeking end‑to‑end risk mitigation and streamlined regulatory coordination. This type‑based market taxonomy clarifies how each service tier contributes to the overall market size, informs strategic partnership decisions, and supports investors in evaluating portfolio diversification within the Biological Drug CDMO landscape.