---
title: API Synthesis & Manufacturing CDMOs in United Kingdom
path: /services/api-synthesis/united-kingdom
companies_count: 15
---

# API Synthesis & Manufacturing CDMOs in United Kingdom

15 published CDMOs match API Synthesis & Manufacturing in United Kingdom.

Locations in this set include United Kingdom, United States, China, France, Ireland, and Germany.

Capabilities that show up most often in this set: Small Molecule, Peptide, Antibody-Drug Conjugate (ADC), Biologics (Other), and Oligonucleotide.

## Matching companies

- [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.
- [Asymchem Laboratories](/companies/asymchem)
  - Asymchem is a CDMO providing integrated API synthesis, drug product development, and biologics manufacturing with specialized capabilities in peptides, oligonucleotides, highly potent compounds, and flow chemistry.
- [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.
- [Cambrex](/companies/cambrex)
  - CDMO offering drug substance and drug product development, manufacturing, and analytical services across small molecules, peptides, and specialty chemistries.
- [Carbogen Amcis](/companies/carbogen-amcis)
  - Full-service CDMO offering integrated drug substance and sterile drug product development and manufacturing from early phase through commercialization, with specialized capabilities in API synthesis, process development, analytical services, and stability testing across multiple scales.
- [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.
- [Fluorochem](/companies/fluorochem-co)
  - Fluorochem supplies over 400,000 high-quality chemicals and reagents globally, with custom synthesis and contract manufacturing capabilities for pharmaceutical and life sciences research.
- [Onyx Scientific](/companies/onyxipca)
  - Small molecule CDMO specialising in process chemistry, solid-state chemistry, and API manufacturing for Phase I–III and commercial supply. Licensed for commercial API production at its Sunderland, UK facility, with a second site in North Carolina, US.
- [Pharmaron](/companies/pharmaron)
  - Premier life science CRO and CDMO offering integrated R&D and manufacturing across drug discovery, preclinical, clinical development, and commercialization for small molecules, biologics, and cell & gene therapies. 25,000+ employees across China, US, and UK.
- [Piramal Pharma Solutions](/companies/piramalpharmasolutions)
  - CDMO specializing in HPAPIs, ADCs, peptides, vaccines, and biologics with 4,700+ team members across 15 global sites and 500+ customers. Offers integrated development and manufacturing with backward integration capabilities and global program management.
- [Quotient Sciences](/companies/quotientsciences)
  - Integrated CDMO offering drug product formulation and manufacturing for small molecules and synthetic peptides, with 30+ years of experience and scalable capacity from clinical to 500 kg commercial batches across US and UK facilities.
- [ReAgent Chemical Services](/companies/reagent-co)
  - UK-based contract chemical manufacturer since 1977, offering bespoke synthesis, formulation development, filling, and repacking services across pharma, industrial, and specialty chemical sectors.
- [SEQENS](/companies/seqens)
  - Global CDMO and specialty ingredients manufacturer with 16 production sites and 9 R&D centres offering custom development and GMP manufacturing of pharmaceutical APIs, intermediates, and specialty chemicals from preclinical to commercial scale.
- [Sai Life Sciences](/companies/sailife)
  - Integrated CRDMO offering discovery, development, and manufacturing services for small molecule NCE programs across 280+ global pharma and biotech clients.
- [Sterling Pharma Solutions](/companies/sterlingpharmasolutions)
  - Small molecule CDMO offering comprehensive API development and manufacturing from discovery through commercial cGMP production, with specialized expertise in complex and hazardous chemistries and ADC bioconjugation.