Segmentation by type classifies Neurodegenerative Disease Treatment products into small‑molecule drugs, biologics (including monoclonal antibodies), gene‑therapy vectors, cell‑based therapies, and symptomatic‑relief formulations. Small‑molecule drugs remain the dominant modality, accounting for roughly 55 % of sales, owing to lower development costs and established manufacturing pathways. Biologics—principally monoclonal antibodies targeting amyloid‑β or α‑synuclein—represent about 25 % of the market, driven by higher pricing and longer development cycles. Gene‑therapy vectors, encompassing AAV‑based delivery systems, occupy an emerging 8 % share, reflecting recent regulatory approvals and high‑value pricing structures. Cell‑based therapies, such as induced pluripotent stem‑cell approaches, contribute near 5 % and are still early‑stage but attract significant investment. Symptomatic‑relief formulations, including anticholinergics and dopamine agonists, make up the remaining 7 %, providing essential palliative care across indications. Together, these type categories delineate the market taxonomy and explain the allocation of research capital and revenue streams within the Neurodegenerative Disease Treatment market. These relative shares influence pipeline prioritization and inform payer reimbursement strategies across the sector.