Within the market taxonomy of types, immersion fluids are classified chiefly into dielectric and non‑dielectric families, each with distinct sub‑categories that influence adoption rates. Dielectric fluids—including synthetic hydrocarbon oils, perfluorinated compounds, and silicone‑based oils—command the majority share due to their high electrical insulation and thermal stability, supporting both HPC and AI applications. Mineral oil, a legacy dielectric, retains a niche presence (≈10 % of type volume) where cost sensitivity outweighs performance constraints. Emerging nanofluid blends that incorporate metallic or ceramic nanoparticles into base oils offer enhanced thermal conductivity, currently representing an estimated 5 % but projected to grow as reliability data mature. Finally, water‑based dielectric emulsions occupy a marginal segment (<5 %) limited by corrosion concerns yet attractive for eco‑friendly deployments. The proportional mix of these fluid types determines overall market capacity, pricing dynamics, and the direction of future innovation in immersion cooling solutions.