--- title: API Synthesis & Manufacturing CDMOs in United States path: /services/api-synthesis/us companies_count: 35 --- # API Synthesis & Manufacturing CDMOs in United States 35 published CDMOs match API Synthesis & Manufacturing in United States. Locations in this set include United States, China, Italy, United Kingdom, India, and Switzerland. Capabilities that show up most often in this set: Small Molecule, Peptide, Biologics (Other), Antibody-Drug Conjugate (ADC), and Biologics (Monoclonal Antibodies). ## Matching companies - [AbbVie Contract Manufacturing](/companies/abbviecontractmfg) - Global CMO offering small and large molecule drug substance to drug product manufacturing, with specialized capabilities in antibody drug conjugates, aseptic fill-finish, biologics (mAbs), HPAPI, and eye care across 12 facilities in the US and Europe. - [Accela ChemBio](/companies/accelachem) - Accela ChemBio designs, synthesizes, and manufactures advanced R&D chemicals and specialty compounds for pharmaceutical and biotech clients. - [Almac Group](/companies/almacgroup) - Global CDMO with 7,900+ employees across 18 facilities, offering integrated drug development and manufacturing services including analytical development, formulation, process development, fill-finish, and specialized chemistry capabilities. - [AmbioPharm](/companies/ambiopharm) - FDA-inspected peptide API manufacturer offering GMP custom synthesis, process development, analytical method validation, and vaccine peptide manufacturing from preclinical through commercial scale. - [Ardena](/companies/ardena) - Ardena is an integrated CDMO and bioanalytical CRO specializing in advanced drug product development, nanomedicine, and bioanalysis for complex molecules including poorly soluble compounds, highly potent APIs, and controlled substances. - [Axplora](/companies/axplora) - Global CDMO and API manufacturer specializing in complex small molecule development, ADC manufacturing, HPAPIs, and hazardous chemistry across ten production sites in Europe, India, and the US. - [BSP Pharmaceuticals](/companies/bsppharmaceuticals) - BSP Pharmaceuticals is a CDMO specializing in development and manufacturing of cytotoxic oncology drugs, ADCs, peptides, proteins, and lipid-based formulations from preclinical GLP through commercial supply. - [Bachem](/companies/bachem) - Global leader in peptide and oligonucleotide development and manufacturing, offering GMP-compliant clinical and commercial supply from early research through commercial scale. - [CMC Pharmaceuticals, Inc.](/companies/cmcpharm) - CMC Pharma provides integrated formulation development, analytical testing, stability studies, and cGMP manufacturing oversight for small molecule drug programs from preclinical through post-approval, with hands-on regulatory expertise and CMO management built in. - [CRAMSN](/companies/cramsn-research-park) - CRAMSN is a contract research, development, and manufacturing organization (CRO/CDMO/CMO) offering end-to-end solutions for drug substance and drug product development with GMP-certified facilities recognized by US, EU, Japan, and Canada regulatory authorities. - [Cambrex](/companies/cambrex) - CDMO offering drug substance and drug product development, manufacturing, and analytical services across small molecules, peptides, and specialty chemistries. - [Catalent](/companies/catalent) - Global CDMO providing end-to-end contract development and manufacturing for pharma, biotech, and consumer health. Delivers 60+ billion doses annually across small molecules, biologics, cell & gene therapies, and clinical supply. - [Charles River Laboratories](/companies/criver) - Charles River Laboratories provides contract research, development, and manufacturing services across the full drug discovery and development continuum, supporting 80% of FDA-approved drugs over the past five years. - [Clearsynth](/companies/clearsynth) - Clearsynth delivers advanced deuterium science, isotopically labelled compounds, custom synthesis, and specialized CDMO services for small-molecule drug discovery and development. ISO 17025, ISO 17034, and ISO 9001:2015 certified with capabilities spanning reference standards, generic APIs, process development, and scale-up manufacturing. - [Curia](/companies/curiaglobal) - Global CDMO with 30+ years of experience offering integrated services across small molecule, generic APIs, sterile drug product, and biologics manufacturing, backed by 20+ facilities and 3,000+ professionals across North America, Europe, and India. - [Dipharma](/companies/dipharma) - Global CDMO and API manufacturer with 600 employees, 4 cGMP plants, and 75+ years of experience in hazardous chemical synthesis, offering exclusive synthesis services and catalogue APIs with FDA, AIFA, and PMDA inspections since 1970. - [Divi's Laboratories](/companies/divislabs) - World's largest API manufacturer and trusted CDMO partner for 25+ years, offering generic APIs, custom synthesis, peptides, and nutraceutical ingredients to 100+ countries with complete backward integration and green chemistry principles. - [Flamma](/companies/flammagroup) - Privately held small molecule CDMO with FDA-inspected cGMP facilities in Italy, USA, and China, offering custom manufacturing, development, and specialized technologies including HPAPI, continuous flow, and cryogenic API synthesis from early-stage to commercial scale. - [Global Biotech Laboratories](/companies/globalbiotechlaboratories) - Global Biotech Laboratories is a peptide and oligonucleotide CDMO offering end-to-end contract development and manufacturing from route scouting through validated commercial supply, with cGMP and ICH Q7 compliance across manufacturing sites on three continents. - [Grand River Aseptic Manufacturing](/companies/grandriverasepticmfg) - Sterile injectable CDMO specializing in fill-finish services for liquid and lyophilized vials, syringes, and cartridges, with Annex 1 compliant facilities and experience in biologics, small molecules, and vaccines.