The Targeted Protein Degradation Technology segmentation by application delineates four principal therapeutic domains: Oncology, Neurology, Immunology, and Other Therapeutic Areas. Oncology accounts for roughly 45 % of total market revenue, driven by the high unmet need for selective degradation of oncogenic drivers and the rapid adoption of PROTAC‑based pipelines in major biopharma firms. Neurology, contributing about 25 %, reflects growing interest in degrading disease‑modifying proteins implicated in neurodegenerative disorders such as tau and α‑synuclein. Immunology, with an estimated 20 % share, is propelled by the ability to modulate intracellular checkpoints and cytokine regulators that conventional antibodies cannot reach. The remaining 10 % falls under Other Therapeutic Areas, encompassing metabolic, infectious, and rare diseases where early‑stage programs are testing degrader platforms. Collectively, these application segments shape the overall market size by allocating R&D spend, clinical trial resources, and partnership capital in proportion to their projected revenue potential. This proportional allocation also influences investor valuation models, as each segment’s growth trajectory informs forecasted cash flows and exit multiples.