Company lists · Data refreshed September 2026

Top 20 Pharmaceutical api manufacturers based in the United Kingdom

Name: Pharmaceutical api 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 17, 2026 75 companies tracked

RevenueBase identified 75 company matches for pharmaceutical api manufacturers associated with the United Kingdom as of September 2026 and tracks 1,557 professional contacts across them, including 139 with verified work emails. London is the largest hub.

This list covers company matches for pharmaceutical api 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 September 17, 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 Sep 17, 2026 How this list was built

75Companies

1,557Contacts tracked

139Verified emails

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The 20 largest pharmaceutical api manufacturers based in the United Kingdom

Ranked by team size

Top 20 of 75 company matches for pharmaceutical api manufacturers based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 17, 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.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Aesica Pharmaceuticals LTD	Exact match	Hemel Hempstead, United KingdomHQ recorded Sep 17, 2026	1,001-5,000	157 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 · Sep 17, 2026 · View company records in RevenueBase
2	Molekula Group	Exact match	Darlington, United KingdomHQ recorded Sep 17, 2026	51-200	44 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 · Sep 17, 2026 · View company records in RevenueBase
3	MNK	Exact match	S41, United KingdomHQ recorded Sep 17, 2026	51-200	41 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
4	Ransom Naturals LTD	Exact match	Hitchin, United KingdomHQ recorded Sep 17, 2026	51-200	37 contacts →
	Exact match “For over 180 years, Ransom Naturals has combined botanical expertise with scientific excellence to develop and manufacture premium natural extracts for the pharmaceutical…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
5	Spectrumx	Exact match	Knutsford, United KingdomHQ recorded Sep 17, 2026	11-50	31 contacts →
	Exact match “SpectrumX is a UK-based pharmaceutical manufacturer operating an MHRA-licensed facility for the production of unlicensed medicines.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
6	Universal Pharma LTD	Exact match	High Wycombe, United KingdomHQ recorded Sep 17, 2026	11-50	27 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 · Sep 17, 2026 · View company records in RevenueBase
7	Whyte Chemicals LTD	Exact match	Finchley, United KingdomHQ recorded Sep 17, 2026	51-200	25 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 · Sep 17, 2026 · View company records in RevenueBase
8	Bspg Laboratories LTD	Exact match	Sandwich, United KingdomHQ recorded Sep 17, 2026	11-50	20 contacts →
	Exact match “BSPG Laboratories Ltd is a UK manufacturer of pure Cannabidiol (CBD) active pharmaceutical ingredient (API).” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
9	MSN Laboratories Europe Limited	Exact match	Hitchin, United KingdomHQ recorded Sep 17, 2026	1-10	13 contacts →
	Exact match “MSN LABORATORIES EUROPE LIMITED is a company based out of INVISION HOUSE WILBURY WAY, HITCHIN, United Kingdom.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
10	Safedale Pharmacy	Exact match	Borehamwood, United KingdomHQ recorded Sep 17, 2026	11-50	12 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
11	Active Pharma Supplies Limited	Exact match	Leyland, United KingdomHQ recorded Sep 17, 2026	11-50	11 contacts →
	Exact match “All the starting materials you require – rapidly.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
12	CINV	Exact match	London, United KingdomHQ recorded Sep 17, 2026	11-50	9 contacts →
	Exact match “CINV is a pharmaceutical supplier focused on producing a GMP-certified product for global execution from our South African facility.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
13	Whyte International Limited	Exact match	Watford, United KingdomHQ recorded Sep 17, 2026	51-200	8 contacts →
	Exact match “Whyte International Limited is a medium size generic pharmaceutical manufacturing and distribution company with headquarters in London and sales and marketing operations in Latin…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
14	Millstone Durbax LTD	Exact match	Runcorn, United KingdomHQ recorded Sep 17, 2026	11-50	6 contacts →
	Exact match “Millstone Durbax manufactures, develops and supplies high-quality speciality feed additives, pharmaceutical, and chemical industries.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
15	Ubichem	Exact match	Redditch, United KingdomHQ recorded Sep 17, 2026	11-50	6 contacts →
	Exact match “Ubichem partners with Pharmaceutical Innovators who trust Ubichem to provide ultimate customer value through technical, product and regulatory solutions.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
16	HFA Healthcare Limited	Exact match	Solihull, United KingdomHQ recorded Sep 17, 2026	1-10	3 contacts →
	Exact match “HFA Healthcare Limited is a pharmaceutical company based in the West Midlands.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
17	Wessex Fine Chemicals Limited	Exact match	Ashford, United KingdomHQ recorded Sep 17, 2026	1-10	3 contacts →
	Exact match “Wessex Fine Chemicals has been sourcing and supplying active substances to medicine manufacturers since its incorporation in 1994.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
18	Disyn Biotec	Exact match	Manchester, United KingdomHQ recorded Sep 17, 2026	1-10	3 contacts →
	Exact match “We work hand in hand with our partners to co-develop novel synthetic solutions for complex APIs.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
19	Pharma Impex Limited	Exact match	London, United KingdomHQ recorded Sep 17, 2026	1-10	3 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
20	Future PAK LTD	Exact match	Hadfield, United KingdomHQ recorded Sep 17, 2026	1-10	1 contacts →
	Exact match “Future Pak Ltd is a UK supplier of branded sustainable food and drink packaging, supporting growing food businesses, multi-site operators, and franchises.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “pharmaceutical api manufacturers”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 20 of 75 pharmaceutical api manufacturers based in the United Kingdom

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Pharmaceutical api manufacturers based in the United Kingdom at a glance

As of Sep 17, 2026

8.9%Verified-email coverage

20.8Average contacts per company

11-50Median size (employees)

24.0%Largest-city concentration · London

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

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 75 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 “pharmaceutical api 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 139 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 September 17, 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 “pharmaceutical api manufacturers”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many pharmaceutical api manufacturers are there based in the United Kingdom?

RevenueBase identified 75 company matches for pharmaceutical api manufacturers associated with the United Kingdom as of September 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?

Aesica Pharmaceuticals LTD tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most pharmaceutical api manufacturers?

London leads with 18 company records, followed by Watford (3) and Borehamwood (2).

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 139 professional contacts with verified work emails tracked across these 75 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 September 17, 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.