Company lists · Data refreshed September 2026

Top 25 Api contract manufacturers based in the United Kingdom

Name: Api contract manufacturers based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 30, 2026 82 companies tracked

RevenueBase identified 82 api contract manufacturers headquartered in the United Kingdom as of September 2026 and tracks 6,846 professional contacts across them, including 4,009 with verified work emails. London is the largest hub.

This list covers api contract manufacturers 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 30, 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.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 30, 2026 86% judged on-target in blind review

82Companies

6,846Contacts tracked

4,009Verified emails

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The 25 largest api contract manufacturers based in the United Kingdom

Ranked by team size

Top 25 of 82 api contract manufacturers based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 30, 2026. RevenueBase Smart Search rates how each company's information relates to api contract manufacturers: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Almac Group	Indirect evidence	Craigavon, United KingdomHQ checked Sep 30, 2026	5,001-10,000	4,577 contacts →
	Indirect evidence “Partnering to Advance Human Health A unique culture delivering exceptional solutions: Almac is a financially secure, privately owned organisation with 7,800+ employees globally.” Source: RevenueBase Database · checked Sep 30, 2026
2	Concept Life Sciences	Partial evidence	High Peak, United KingdomHQ checked Sep 30, 2026	201-500	209 contacts →
	Partial evidence “Concept Life Sciences is a knowledge-based, science-led and customer-focused contract research and manufacturing organisation with world-leading expertise in the pharmaceutical…” Source: RevenueBase Database · checked Sep 30, 2026
3	Aesica Pharmaceuticals LTD	Strong evidence	Hemel Hempstead, United KingdomHQ checked Sep 30, 2026	1,001-5,000	157 contacts →
	Strong evidence “Aesica is a leading pharmaceutical contract development and manufacturing organisation (CDMO) for both APIs and finished dose forms.” Source: RevenueBase Database · checked Sep 30, 2026
4	Upperton Pharma Solutions	Partial evidence	Beeston, United KingdomHQ checked Sep 30, 2026	51-200	110 contacts →
	Partial evidence “Upperton Pharma Solutions is a specialist CDMO (contract development and manufacturing organisation) providing formulation and dosage form development and clinical trial…” Source: RevenueBase Database · checked Sep 30, 2026
5	Arcinova	Partial evidence	Alnwick, United KingdomHQ checked Sep 30, 2026	51-200	102 contacts →
	Partial evidence “Arcinova, A Quotient Sciences Company, is dedicated to providing innovative contract research, development, and manufacturing services.” Source: RevenueBase Database · checked Sep 30, 2026
6	Noumed Life Sciences Limited	Indirect evidence	Maidenhead, United KingdomHQ checked Sep 30, 2026	51-200	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 30, 2026
7	Onyx Scientific	Indirect evidence	Sunderland, United KingdomHQ checked Sep 30, 2026	51-200	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 30, 2026
8	MNK	Indirect evidence	S41, United KingdomHQ checked Sep 30, 2026	51-200	41 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 30, 2026
9	Group55 LTD	Partial evidence	Chorley, United KingdomHQ checked Sep 30, 2026	51-200	40 contacts →
	Partial evidence “We’re more than a manufacturer.” Source: RevenueBase Database · checked Sep 30, 2026
10	Ransom Naturals LTD	Partial evidence	Hitchin, United KingdomHQ checked Sep 30, 2026	51-200	37 contacts →
	Partial 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 30, 2026
11	Spectrumx	Partial evidence	Knutsford, United KingdomHQ checked Sep 30, 2026	11-50	31 contacts →
	Partial evidence “SpectrumX is a UK-based pharmaceutical manufacturer operating an MHRA-licensed facility for the production of unlicensed medicines.” Source: RevenueBase Database · checked Sep 30, 2026
12	Storefast Solutions	Strong evidence	Ebbsfleet, United KingdomHQ checked Sep 30, 2026	11-50	30 contacts →
	Strong evidence “Storefast Solutions is a UK-based contract manufacturer specialising in liquid compounding, formulation, and warehousing services.” Source: RevenueBase Database · checked Sep 30, 2026
13	Universal Pharma LTD	Partial evidence	High Wycombe, United KingdomHQ checked Sep 30, 2026	11-50	27 contacts →
	Partial 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 30, 2026
14	Premier Health Products	Indirect evidence	Coventry, United KingdomHQ checked Sep 30, 2026	11-50	19 contacts →
	Indirect evidence “At Premier Health Products, we have been making supplements since 1989.” Source: RevenueBase Database · checked Sep 30, 2026
15	Cambridge Pharma	Indirect evidence	Cambridge, United KingdomHQ checked Sep 30, 2026	51-200	13 contacts →
	Indirect evidence “Our Fast, flexible, sterile fill-finish service is specifically designed to meet the needs of clinical trials.” Source: RevenueBase Database · checked Sep 30, 2026
16	MSN Laboratories Europe Limited	Indirect evidence	Hitchin, United KingdomHQ checked Sep 30, 2026	1-10	13 contacts →
	Indirect evidence “MSN LABORATORIES EUROPE LIMITED is a company based out of INVISION HOUSE WILBURY WAY, HITCHIN, United Kingdom.” Source: RevenueBase Database · checked Sep 30, 2026
17	Active Pharma Supplies Limited	Indirect evidence	Leyland, United KingdomHQ checked Sep 30, 2026	11-50	11 contacts →
	Indirect evidence “All the starting materials you require – rapidly.” Source: RevenueBase Database · checked Sep 30, 2026
18	Protein Partners LTD	Indirect evidence	Hyde, United KingdomHQ checked Sep 30, 2026	11-50	10 contacts →
	Indirect evidence “Co-Packing and Manufacturing experts for sports nutrition, health and wellness brands.” Source: RevenueBase Database · checked Sep 30, 2026
19	CINV	Indirect evidence	London, United KingdomHQ checked Sep 30, 2026	11-50	9 contacts →
	Indirect evidence “CINV is a pharmaceutical supplier focused on producing a GMP-certified product for global execution from our South African facility.” Source: RevenueBase Database · checked Sep 30, 2026
20	Creative Cosmetics LTD	Partial evidence	Ipswich, United KingdomHQ checked Sep 30, 2026	11-50	8 contacts →
	Partial evidence “With 30 years in the design and manufacture of cosmetic products, Creative Cosmetics are able to offer a complete or part service in the manufacture and supply of own branded…” Source: RevenueBase Database · checked Sep 30, 2026
21	Ubichem	Indirect evidence	Redditch, United KingdomHQ checked Sep 30, 2026	11-50	6 contacts →
	Indirect evidence “Ubichem partners with Pharmaceutical Innovators who trust Ubichem to provide ultimate customer value through technical, product and regulatory solutions.” Source: RevenueBase Database · checked Sep 30, 2026
22	Green Park Pharma	Indirect evidence	Newquay, United KingdomHQ checked Sep 30, 2026	1-10	5 contacts →
	Indirect evidence “Green Park Pharma UK Ltd.” Source: RevenueBase Database · checked Sep 30, 2026
23	Wessex Fine Chemicals Limited	Partial evidence	Ashford, United KingdomHQ checked Sep 30, 2026	1-10	3 contacts →
	Partial evidence “Wessex Fine Chemicals has been sourcing and supplying active substances to medicine manufacturers since its incorporation in 1994.” Source: RevenueBase Database · checked Sep 30, 2026
24	Pepceuticals	Partial evidence	Enderby, United KingdomHQ checked Sep 30, 2026	11-50	3 contacts →
	Partial evidence “Part of the Biosynth Group since Sept 2023, Pepceuticals Ltd,(est.1998), is a specialist British manufacturer of synthetic peptides.” Source: RevenueBase Database · checked Sep 30, 2026
25	Disyn Biotec	Partial evidence	Manchester, United KingdomHQ checked Sep 30, 2026	1-10	3 contacts →
	Partial evidence “We work hand in hand with our partners to co-develop novel synthetic solutions for complex APIs.” Source: RevenueBase Database · checked Sep 30, 2026

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: api contract manufacturers. 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 api contract manufacturers.
Partial evidence: Its own public description names part of api contract manufacturers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name api contract manufacturers. 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 82 api contract manufacturers based in the United Kingdom

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Api contract manufacturers based in the United Kingdom at a glance

As of Sep 30, 2026

58.6%Verified-email coverage

83.5Average contacts per company

11-50Median size (employees)

14.6%Largest-city concentration · London

Sep 30, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

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 82 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 api contract manufacturers, 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 “api contract manufacturers”. 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 api contract manufacturers), 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 api contract manufacturers, 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, 4,009 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 30, 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.

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 api contract manufacturers, 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 api contract manufacturers are there based in the United Kingdom?

RevenueBase identified 82 api contract manufacturers 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?

Almac Group, headquartered in Craigavon, tops this list with the largest team on record.

Which city has the most api contract manufacturers?

London leads with 12 headquartered companies, followed by Ashford (2) and Cramlington (2).

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 4,009 verified decision-maker contacts tracked across these 82 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 30, 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 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.