Company lists · Data refreshed October 2026

Top 25 Complex molecule manufacturers based in the United Kingdom

RevenueBase identified 101 company matches for complex molecule manufacturers associated with the United Kingdom as of October 2026 and tracks 8,177 professional contacts across them, including 4,609 with verified work emails. London is the largest hub.

This list covers company matches for complex molecule manufacturers associated with the United Kingdom, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed October 10, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list RevenueBase SmartSearch · Exact Recorded Oct 10, 2026 How this list was built
101Companies
8,177Contacts tracked
4,609Verified emails
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The 25 largest complex molecule manufacturers based in the United Kingdom

Ranked by team size
Top 25 of 101 company matches for complex molecule manufacturers based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 10, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchCraigavon, United KingdomHQ recorded Oct 10, 20265,001-10,0004,686 contacts →

Exact match

“Partnering to Advance Human Health A unique culture delivering exceptional solutions: Almac is a financially secure, privately owned organisation with 7,800+ employees globally.”

Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
2Exact matchHigh Peak, United KingdomHQ recorded Oct 10, 2026201-500189 contacts →

Exact match

“Concept Life Sciences is a knowledge-based, science-led and customer-focused contract research and manufacturing organisation with world-leading expertise in the pharmaceutical…”

Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
3Exact matchHemel Hempstead, United KingdomHQ recorded Oct 10, 20261,001-5,000167 contacts →

Exact match

“Aesica is a leading pharmaceutical contract development and manufacturing organisation (CDMO) for both APIs and finished dose forms.”

Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
4Exact matchAlnwick, United KingdomHQ recorded Oct 10, 202651-200121 contacts →

Exact match

“Arcinova, A Quotient Sciences Company, is dedicated to providing innovative contract research, development, and manufacturing services.”

Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
5Exact matchWentloog, United KingdomHQ recorded Oct 10, 202651-200115 contacts →

Exact match

“CatSci Ltd is an award-winning innovation partner, dedicated to breaking down the silos in small molecules, TACS, glues and oligonucleotides CMC development to accelerate the…”

Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
6Exact matchBeeston, United KingdomHQ recorded Oct 10, 202651-200109 contacts →

Exact match

“Upperton Pharma Solutions is a specialist CDMO (contract development and manufacturing organisation) providing formulation and dosage form development and clinical trial…”

Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
7Exact matchConsett, United KingdomHQ recorded Oct 10, 202651-200101 contacts →

Exact match

“Thomas Swan & Co.”

Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
8Exact matchMiddlesbrough, United KingdomHQ recorded Oct 10, 2026201-50091 contacts →

Exact match

“Fine Organics, a Lianhe Chemical Technology business, is a leading European contract manufacturer of high quality fine chemicals for use in the Crop Protection, Pharmaceutical and…”

Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
9Exact matchCardiff, United KingdomHQ recorded Oct 10, 202651-20090 contacts →

Exact match

“Biocatalysts is a biotechnology company producing speciality enzymes at commercial scales for a variety of industries.”

Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
10Exact matchSunderland, United KingdomHQ recorded Oct 10, 202651-20088 contacts →

Exact match

“Onyx Scientific is a CDMO that helps pharmaceutical and biotech companies across the globe, accelerate candidates from discovery to manufacturing.”

Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
11Exact matchDeeside, United KingdomHQ recorded Oct 10, 202651-20079 contacts →

Exact match

“Established in 2002, we are a premier GMP approved formulation contract development manufacturing organization (CDMO) offering services from MHRA and FDA inspected facilities:*…”

Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
12Exact matchCorsham, United KingdomHQ recorded Oct 10, 202651-20073 contacts →

Exact match

“Bath ASU is a pharmaceutical specials manufacturer based in Corsham, Wiltshire.”

Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
13Exact matchNewhouse, United KingdomHQ recorded Oct 10, 202651-20070 contacts →

Exact match

“Founded in 2013, BioAscent is a leading provider of integrated drug discovery services based at the former Organon / MSD R&D site in Newhouse, Scotland, UK.”

Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
14Exact matchWinchester, United KingdomHQ recorded Oct 10, 202651-20064 contacts →

Exact match

“Biopharma Group has dedicated divisions covering the UK, France, Ireland, and USA.”

Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
15Exact matchDenton, United KingdomHQ recorded Oct 10, 202651-20053 contacts →

Exact match

“We’re specialists in the manufacture and supply of aromatic, heterocyclic and aliphatic compounds, fluorochemicals and life sciences reagents, offering unrivalled service and…”

Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
16Exact matchDarlington, United KingdomHQ recorded Oct 10, 202651-20046 contacts →

Exact match

“Molekula is a manufacturer and distributor of Fine Chemicals and Biochemicals in Bulk and Research quantities Founded in in France and the UK to initially support the Chemical…”

Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
17Exact matchLiverpool, United KingdomHQ recorded Oct 10, 202611-5043 contacts →

Exact match

“Powder Systems Ltd (PSL) is a global manufacturer of innovative technologies and process services used in the pharmaceutical, life sciences, and fine chemicals industries.”

Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
18Exact matchHadfield, United KingdomHQ recorded Oct 10, 202651-20037 contacts →

Exact match

“Fluorochem is a leading supplier in the chemical industry, with nearly 60 years of experience supporting scientists in chemistry, pharmaceuticals and medicinal chemistry, and…”

Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
19Exact matchCambridge, United KingdomHQ recorded Oct 10, 202611-5031 contacts →

Exact match

“Isomerase helps partners innovate and harness the microbial power of a wide range of bacteria and fungi to discover and produce native or novel natural products, peptides, and…”

Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
20Exact matchFinchley, United KingdomHQ recorded Oct 10, 202651-20028 contacts →

Exact match

“Whyte Chemicals is a privately owned company established in 1976 with a turnover in the region of 60 million.”

Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
21Exact matchHigh Wycombe, United KingdomHQ recorded Oct 10, 202611-5027 contacts →

Exact match

“Experts in Active Pharmaceutical Ingredients(APIs), Intermediates and other difficult to source Pharmaceutical ingredients- Cover APIs requirements from Development, Scale-Up and…”

Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
22Exact matchCamelford, United KingdomHQ recorded Oct 10, 202611-5025 contacts →

Exact match

“Key Organics is a leading UK-based chemistry CRO providing a range of discovery, research and development services to the international life sciences industries.”

Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
23Exact matchMilton Park, United KingdomHQ recorded Oct 10, 202611-5021 contacts →

Exact match

“Hypha Discovery is a specialist CRO with expertise in metabolite profiling (MetID), synthesis, purification and structure elucidation using NMR spectroscopy.”

Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
24Exact matchRuncorn, United KingdomHQ recorded Oct 10, 202611-5021 contacts →

Exact match

“Established in 1996, Manchester Organics has grown into a world leader in fluorination and high pressure chemistry, research and manufacturing.”

Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
25Exact matchCambridge, United KingdomHQ recorded Oct 10, 202611-5021 contacts →

Exact match

“Our mission is to enable synthetic biologists, by using our technology to unlock access to genes with unparalleled accuracy.”

Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase

Showing 25 of 101 complex molecule manufacturers based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 4,609 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Complex molecule manufacturers based in the United Kingdom at a glance

As of Oct 10, 2026
56.4%Verified-email coverage
81.0Average contacts per company
11-50Median size (employees)
11.9%Largest-city concentration · London
Oct 10, 2026Page data refreshed

Companies by employee count

1-10
24
11-50
42
51-200
23
201-500
4
501-1,000
1
1,001-5,000
4
5,001-10,000
1
10001+
1

Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 101 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies
Company records associated with the United Kingdom whose business descriptions match “complex molecule manufacturers” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
Ranking
Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification
Every displayed company carries at least one verified work email. RevenueBase tracks 4,609 professional contacts with verified work emails across the full matched dataset. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh
This page's figures were pulled from the company graph on October 10, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “complex molecule manufacturers”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many complex molecule manufacturers are there based in the United Kingdom?

RevenueBase identified 101 company matches for complex molecule manufacturers associated with the United Kingdom as of October 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Almac Group tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most complex molecule manufacturers?

London leads with 12 company records, followed by Cambridge (6) and Bristol (3).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 4,609 professional contacts with verified work emails tracked across these 101 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on October 10, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.