API dominates Peptide and Oligonucleotide CDMO segmentation, accounting for roughly 60 % of outsourced spend because peptide APIs carry 5โ10ร the manufacturing cost of standard small molecules, while oligonucleotide APIs demand high-cost phosphoramidite chemistries and multi-ton GMP-grade solvents. The segment is further split into linear peptidesโstill over 80 % of commercial kilogram demand owing to simpler solid-phase routesโand modified variants (lipidated, PEGylated, cyclized) that command 30โ40 % price premiums and are the fastest-growing sub-set as half-lives and target specificity improve. Drug-product services, ~25 % of peptide outsourcing value, separate into aseptic lyophilised vials for hospital-based glucagon-like peptides and prefilled pens for self-administered obesity therapies; the latter is growing 2ร faster as volume-driven chronic indications expand. Finally, the small but rising intermediate/bulk bucket (โค15 %) captures protected amino-acid building blocks and peptideโpayload linkers used in ADC programs, tightening supply security for CDMOs that integrate back to early-stage raw materials.