Company lists · Data refreshed September 2026

Top 25 Pharmaceutical development companies based in the United Kingdom

Name: Pharmaceutical development companies 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 400 companies tracked

RevenueBase identified 400 pharmaceutical development companies headquartered in the United Kingdom as of September 2026 and tracks 14,737 professional contacts across them, including 4,128 with verified work emails. London is the largest hub.

This list covers pharmaceutical development companies 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 17, 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 17, 2026 86% judged on-target in blind review

400Companies

14,737Contacts tracked

4,128Verified emails

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The 25 largest pharmaceutical development companies based in the United Kingdom

Ranked by team size

Top 25 of 400 pharmaceutical development companies based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to pharmaceutical development companies: 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	Bespak	Partial evidence	Holmes Chapel, United KingdomHQ checked Sep 17, 2026	1,001-5,000	536 contacts →
	Partial evidence “Bespak is a global contract development and manufacturing organisation (CDMO) focused on inhaled and nasal drug delivery devices and drug-device combination products.” Source: RevenueBase Database · checked Sep 17, 2026
2	O2h Discovery	Indirect evidence	Cambridge, United KingdomHQ checked Sep 17, 2026	501-1,000	521 contacts →
	Indirect evidence “Founded in 2005, o2h discovery is a Contract Research Organisation which has an integrated drug discovery platform operating from our state-of-the-art research centre in India and…” Source: RevenueBase Database · checked Sep 17, 2026
3	Vernalis	Partial evidence	Cambridge, United KingdomHQ checked Sep 17, 2026	51-200	330 contacts →
	Partial evidence “We develop and apply fragment and structure-based methods to solve problems in drug discovery, and have generated cell active lead compounds and development candidates against…” Source: RevenueBase Database · checked Sep 17, 2026
4	Bristol Myers Squibb UK & Ireland	Partial evidence	London, United KingdomHQ checked Sep 17, 2026	1,001-5,000	317 contacts →
	Partial evidence “Bristol Myers Squibb is a differentiated company, led by our revolutionary BioPharma strategy that combines the reach and resources of a major pharmaceutical firm with the…” Source: RevenueBase Database · checked Sep 17, 2026
5	Pharmanovia	Partial evidence	Basildon, United KingdomHQ checked Sep 17, 2026	201-500	300 contacts →
	Partial evidence “Pharmanovia is an innovative specialty pharmaceutical company with a clear purpose: helping patients lead fuller lives today and tomorrow.” Source: RevenueBase Database · checked Sep 17, 2026
6	Crescent Pharma LTD	Strong evidence	Basingstoke, United KingdomHQ checked Sep 17, 2026	51-200	265 contacts →
	Strong evidence “Crescent Pharma Limited is an established UK registered pharmaceutical company with a wide range of experience in the development, quality control and marketing of generic…” Source: RevenueBase Database · checked Sep 17, 2026
7	B&s Group	Partial evidence	Perivale, United KingdomHQ checked Sep 17, 2026	501-1,000	250 contacts →
	Partial evidence “Operating since B&S Group with its global presence has become one of the leading Pharmaceutical suppliers in the UK, experts in nationwide distribution and at the forefront of…” Source: RevenueBase Database · checked Sep 17, 2026
8	Rosemont Pharmaceuticals	Indirect evidence	Leeds, United KingdomHQ checked Sep 17, 2026	51-200	227 contacts →
	Indirect evidence “At Rosemont our mission is to be a rapid developer, reliable manufacturer and global supplier of novel-delivery, patient-focused medicines.” Source: RevenueBase Database · checked Sep 17, 2026
9	GW Pharmaceuticals PLC	Partial evidence	Cambridge, United KingdomHQ checked Sep 17, 2026	1,001-5,000	218 contacts →
	Partial evidence “GW Pharmaceuticals is now part of Jazz Pharmaceuticals.” Source: RevenueBase Database · checked Sep 17, 2026
10	HVIVO	Partial evidence	London, United KingdomHQ checked Sep 17, 2026	51-200	214 contacts →
	Partial evidence “hVIVO plc (Ticker: HVO) is a science‑led early‑phase drug development company purpose‑built to meet the growing complexity of modern clinical research.” Source: RevenueBase Database · checked Sep 17, 2026
11	Napp Pharmaceuticals Limited	Partial evidence	Cambridge, United KingdomHQ checked Sep 17, 2026	51-200	208 contacts →
	Partial evidence “Napp Pharmaceuticals is a member of the Mundipharma network of independent associated companies.” Source: RevenueBase Database · checked Sep 17, 2026
12	Aspire Pharma LTD	Partial evidence	Petersfield, United KingdomHQ checked Sep 17, 2026	51-200	176 contacts →
	Partial evidence “Aspire Pharma is an innovative, privately owned British pharmaceutical company established in 2009.” Source: RevenueBase Database · checked Sep 17, 2026
13	Aesica Pharmaceuticals LTD	Strong evidence	Hemel Hempstead, United KingdomHQ checked Sep 17, 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 17, 2026
14	The Association Of The British Pharmaceutical Industry Abpi	Indirect evidence	London, United KingdomHQ checked Sep 17, 2026	51-200	120 contacts →
	Indirect evidence “The ABPI exists to make the UK the best place in the world to research, develop and use new medicines.” Source: RevenueBase Database · checked Sep 17, 2026
15	Daiichi Sankyo UK	Partial evidence	Uxbridge, United KingdomHQ checked Sep 17, 2026	201-500	117 contacts →
	Partial evidence “Daiichi Sankyo UK is a pharmaceutical company with corporate origins in Japan.” Source: RevenueBase Database · checked Sep 17, 2026
16	Catsci LTD	Partial evidence	Wentloog, United KingdomHQ checked Sep 17, 2026	51-200	114 contacts →
	Partial evidence “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…” Source: RevenueBase Database · checked Sep 17, 2026
17	Novumgen	Partial evidence	London, United KingdomHQ checked Sep 17, 2026	51-200	111 contacts →
	Partial evidence “Novumgen was founded by a group of experienced pharmaceutical professionals with the goal of developing and producing innovative, high quality medicines.” Source: RevenueBase Database · checked Sep 17, 2026
18	Upperton Pharma Solutions	Partial evidence	Beeston, United KingdomHQ checked Sep 17, 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 17, 2026
19	Custom Pharma Services	Partial evidence	Hove, United KingdomHQ checked Sep 17, 2026	51-200	104 contacts →
	Partial evidence “Custom Pharma Services is located in Brighton, UK since 1979 and is a full-service contract development and manufacturing organisation (CDMO) providing services tailored to your…” Source: RevenueBase Database · checked Sep 17, 2026
20	Arcinova	Partial evidence	Alnwick, United KingdomHQ checked Sep 17, 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 17, 2026
21	Orbit Pharmaceuticals	Partial evidence	London, United KingdomHQ checked Sep 17, 2026	51-200	100 contacts →
	Partial evidence “Orbit Pharma is a rapidly expanding, privately owned company focused on the development and marketing of high quality, specialist generic medicines across the UK, Europe, ANZ…” Source: RevenueBase Database · checked Sep 17, 2026
22	Intertek Melbourn	Strong evidence	Cambridge, United KingdomHQ checked Sep 17, 2026	201-500	99 contacts →
	Strong evidence “A leading provider of pharmaceutical analysis and formulation support with 30+ years of experience in inhaled product development and Good Manufacturing Practice (GMP) compliant…” Source: RevenueBase Database · checked Sep 17, 2026
23	Domainex	Partial evidence	Saffron Walden, United KingdomHQ checked Sep 17, 2026	51-200	97 contacts →
	Partial evidence “Domainex is a fully integrated drug discovery service company based near Cambridge, UK serving pharmaceutical, biotechnology, academic and patient foundations globally.” Source: RevenueBase Database · checked Sep 17, 2026
24	IPS Pharma	Partial evidence	West Molesey, United KingdomHQ checked Sep 17, 2026	51-200	91 contacts →
	Partial evidence “IPS Pharma is an independent international pharmaceutical services company operating in three main areas: Unlicensed medicines (Unlicensed Imports and Specials), Clinical Trials…” Source: RevenueBase Database · checked Sep 17, 2026
25	Noumed Life Sciences Limited	Partial evidence	Maidenhead, United KingdomHQ checked Sep 17, 2026	51-200	87 contacts →
	Partial 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 17, 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: pharmaceutical development companies. 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 pharmaceutical development companies.
Partial evidence: Its own public description names part of pharmaceutical development companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name pharmaceutical development companies. 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 400 pharmaceutical development companies based in the United Kingdom

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Pharmaceutical development companies based in the United Kingdom at a glance

As of Sep 17, 2026

28.0%Verified-email coverage

36.8Average contacts per company

11-50Median size (employees)

25.5%Largest-city concentration · London

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

173

11-50

101

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 400 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 pharmaceutical development companies, 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 “pharmaceutical development companies”. 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 pharmaceutical development companies), 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 pharmaceutical development companies, 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, 4,128 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 17, 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.

Pharmaceutical development companies by metro

Pharmaceutical development companies in London102

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 pharmaceutical development companies, 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 pharmaceutical development companies are there based in the United Kingdom?

RevenueBase identified 400 pharmaceutical development companies 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?

Bespak, headquartered in Holmes Chapel, tops this list with the largest team on record.

Which city has the most pharmaceutical development companies?

London leads with 102 headquartered companies, followed by Cambridge (21) and Nottingham (8).

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 4,128 verified decision-maker contacts tracked across these 400 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 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 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.