Segmentation by Types classifies the enzymatic platforms employed in API manufacture, each adding distinct value to the market. Hydrolases, particularly lipases and proteases, dominate due to their versatility in kinetic resolution and esterification, supporting a broad spectrum of chiral intermediates. Oxidoreductases, including dehydrogenases and monooxygenases, enable selective oxidation and reduction steps that replace hazardous reagents, expanding the scope for green chemistry. Transferases such as transaminases and methyltransferases are pivotal for constructing C‑N and C‑C bonds with high enantioselectivity, crucial for nitrogen‑containing APIs. Lyases and Isomerases address niche transformations like decarboxylation and epimerization, respectively, facilitating access to otherwise challenging scaffolds. The market weight of each type aligns with its industrial maturity and enzyme availability: hydrolases and oxidoreductases together account for roughly 70 % of total enzymatic API revenue, while transferases, lyases, and isomerases split the remaining share, underscoring a diversified yet concentrated technology portfolio.