The Size Exclusion Chromatography (SEC) Column ecosystem spans three functional layers that together create and capture value for analytical and bioprocessing applications. Upstream, raw material and component suppliers deliver polymer resins, silica, and specialty binders that define column selectivity and mechanical stability. Midstream, original equipment manufacturers, technology providers, and system integrators convert these inputs into calibrated columns and integrate them within chromatography platforms, adding performance data and automation capabilities. Downstream, distributors, service firms, and end‑user laboratories complete the chain by handling logistics, providing qualification support, and executing separations that generate data for product development or quality control. Value is transferred through contractual sales, service agreements, and data licensing, while each tier relies on the preceding tier’s technical compliance and timely delivery.