Company lists · Data refreshed September 2026
Top 25 Apis and intermediates producers based in the United Kingdom
RevenueBase identified 147 apis and intermediates producers headquartered in the United Kingdom as of September 2026 and tracks 2,883 professional contacts across them, including 607 with verified work emails. London is the largest hub.
This list covers apis and intermediates producers headquartered in the United Kingdom, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 19, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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.
The 25 largest apis and intermediates producers based in the United Kingdom
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 157 contacts → | ||||
Partial evidence “Aesica is a leading pharmaceutical contract development and manufacturing organisation (CDMO) for both APIs and finished dose forms.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 2 | 102 contacts → | ||||
Indirect evidence “Arcinova, A Quotient Sciences Company, is dedicated to providing innovative contract research, development, and manufacturing services.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 3 | 87 contacts → | ||||
Indirect evidence “Thomas Swan & Co.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 4 | 87 contacts → | ||||
Indirect evidence “Founded in 2013 and operationalized in 2016, Noumed Life Sciences is a generics pharmaceutical manufacturing company based out of the United Kingdom.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 5 | 86 contacts → | ||||
Indirect evidence “Onyx Scientific is a CDMO that helps pharmaceutical and biotech companies across the globe, accelerate candidates from discovery to manufacturing.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 6 | 50 contacts → | ||||
Indirect evidence “Founded in 1860, Banner supplies an extensive range of solvents and specialty chemicals to a variety of market sectors.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 7 | 47 contacts → | ||||
Indirect evidence “We’re specialists in the manufacture and supply of aromatic, heterocyclic and aliphatic compounds, fluorochemicals and life sciences reagents, offering unrivalled service and…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 8 | 44 contacts → | ||||
Indirect evidence “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…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 9 | 41 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 10 | 40 contacts → | ||||
Indirect evidence “Powder Systems Ltd (PSL) is a global manufacturer of innovative technologies and process services used in the pharmaceutical, life sciences, and fine chemicals industries.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 11 | 37 contacts → | ||||
Indirect evidence “For over 180 years, Ransom Naturals has combined botanical expertise with scientific excellence to develop and manufacture premium natural extracts for the pharmaceutical…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 12 | 36 contacts → | ||||
Indirect evidence “High Force Research specialise in chemical synthesis and R&D and offer chemistry built on many years of experience in development and scale-up of complex syntheses of molecules…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 13 | 36 contacts → | ||||
Indirect evidence “Thew Arnott is focussed on the development, manufacture and sales of speciality ingredients.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 14 | 34 contacts → | ||||
Partial evidence “Endeavour Speciality Chemicals is an innovative UK-based manufacturer of speciality organic intermediates and together with our parent company Robinson Brothers we offer products…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 15 | 30 contacts → | ||||
Indirect evidence “Fluorochem is a leading supplier in the chemical industry, with nearly 60 years of experience supporting scientists in chemistry, pharmaceuticals and medicinal chemistry, and…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 16 | 27 contacts → | ||||
Indirect evidence “Apex Molecular is a leading UK based Chemistry Services Contract Research Organisation based at Alderley Park, providing specialist chemistry services to the pharmaceutical…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 17 | 27 contacts → | ||||
Strong evidence “Experts in Active Pharmaceutical Ingredients(APIs), Intermediates and other difficult to source Pharmaceutical ingredients- Cover APIs requirements from Development, Scale-Up and…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 18 | 25 contacts → | ||||
Indirect evidence “Whyte Chemicals is a privately owned company established in 1976 with a turnover in the region of 60 million.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 19 | 23 contacts → | ||||
Indirect evidence “Key Organics is a leading UK-based chemistry CRO providing a range of discovery, research and development services to the international life sciences industries.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 20 | 21 contacts → | ||||
Indirect evidence “NICOBRAND LIMITED is a Pharmaceutical company located in Castleroe Road, Coleraine, Northern Ireland.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 21 | 21 contacts → | ||||
Indirect evidence “Glentham Life Sciences is a UK-headquartered supplier of fine chemicals, biochemicals and raw materials.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 22 | 21 contacts → | ||||
Indirect evidence “Colour Synthesis Solutions (CSS) is a leading provider of fine chemicals and chemistry research and development services.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 23 | 19 contacts → | ||||
Indirect evidence “Hypha Discovery is a specialist CRO with expertise in metabolite profiling (MetID), synthesis, purification and structure elucidation using NMR spectroscopy.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 24 | 19 contacts → | ||||
Indirect evidence “For the total GMP synthesis of complex carbohydrates and carbohydrate based medicinal chemistry, Dextra has a proven record of developing innovative solutions to minimise costs…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 25 | 18 contacts → | ||||
Indirect evidence “Witton Chemical Company specialises in the manufacture of fine chemicals and polymers, including product isolation and drying from flammable solvents, a variety of exothermic…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
RevenueBase Smart Search
RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: apis and intermediates producers. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.
- Strong evidence
- The company's own public description of its business names apis and intermediates producers.
- Partial evidence
- Its own public description names part of apis and intermediates producers, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name apis and intermediates producers. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.
RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.
Showing 25 of 147 apis and intermediates producers based in the United Kingdom
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Apis and intermediates producers based in the United Kingdom at a glance
As of Sep 19, 2026Companies by employee count
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 147 companies.
How this list was built
Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among apis and intermediates producers, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
- What qualifies
- Companies headquartered in the United Kingdom whose own description of what they do matches “apis and intermediates producers”. Matching reads each company's description, not its industry code or its name.
- RevenueBase Smart Search
- RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names apis and intermediates producers), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
- What we exclude
- Companies whose own description does not clearly place them among apis and intermediates producers, and records with no verified work email. Companies headquartered outside United Kingdom are excluded even when they keep an office there.
- Match quality
- In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
- 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 listed company carries at least one verified work email, 607 across the full list. 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 September 19, 2026. Lists refresh periodically as the graph is re-checked.
- Corrections
- Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.
Apis and intermediates producers by metro
- Apis and intermediates producers in London29
Frequently asked
What is RevenueBase Smart Search?
RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names apis and intermediates producers, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.
How many apis and intermediates producers are there based in the United Kingdom?
RevenueBase identified 147 apis and intermediates producers headquartered in the United Kingdom as of September 2026, matched on each company's own description of what it does rather than its industry code.
What is the largest company on this list?
Aesica Pharmaceuticals LTD, headquartered in Hemel Hempstead, tops this list with the largest team on record.
Which city has the most apis and intermediates producers?
London leads with 29 headquartered companies, followed by Runcorn (5) and Harrow (3).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 607 verified decision-maker contacts tracked across these 147 companies.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 19, 2026.
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Apis and intermediates producers by geography
- Apis and intermediates producers based in Ahmedabad, India
- Apis and intermediates producers based in Ankleshwar, India
- Apis and intermediates producers based in Bangalore, India
- Apis and intermediates producers based in Bengaluru, India
- Apis and intermediates producers based in Chennai, India
- Apis and intermediates producers based in Delhi, India
- Apis and intermediates producers based in Hyderabad, India
- Apis and intermediates producers based in Mumbai, India
- Apis and intermediates producers based in Navi Mumbai, India
- Apis and intermediates producers based in New Delhi, India
- Apis and intermediates producers based in Pune, India
- Apis and intermediates producers based in Thane, India
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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 Smart Search, 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.
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