The Continuous Glucose Monitoring (CGM) Sensors ecosystem spans three functional layers. Upstream, raw‑material and component suppliers provide semiconductor wafers, biocompatible polymers, and enzyme coatings that enable sensor miniaturisation and accuracy. Midstream actors—sensor OEMs, technology providers, and system integrators—combine these inputs into calibrated electrochemical modules, embed wireless communication stacks, and package the devices for clinical use. Downstream, distributors and channel partners deliver finished sensors to hospitals, diabetes clinics, and retail pharmacies, while service providers manage calibration, data‑upload, and after‑sales support. Value is captured through a mix of product sales, recurring subscription fees for data analytics, and reimbursement contracts with payers. The chain is tightly linked to regulatory approval processes, which shape design specifications and market entry timing. Licensing agreements between technology providers and OEMs enable revenue sharing on proprietary algorithms, while data‑monetisation models allow manufacturers to capture additional income from anonymised glucose trends.