Company lists · Data refreshed September 2026

Top 25 Drug development service providers based in the United Kingdom

Name: Drug development service providers based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 561 companies tracked

RevenueBase identified 561 drug development service providers headquartered in the United Kingdom as of September 2026 and tracks 25,706 professional contacts across them, including 11,858 with verified work emails. London is the largest hub.

This list covers drug development service providers 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.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 19, 2026 86% judged on-target in blind review

561Companies

25,706Contacts tracked

11,858Verified emails

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The 25 largest drug development service providers based in the United Kingdom

Ranked by team size

Top 25 of 561 drug development service providers based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to drug development service providers: 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 19, 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 19, 2026
2	Perceptive INC	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	1,001-5,000	1,197 contacts →
	Indirect evidence “Expanding on their combined 50-year history, Perceptive provides best-in-class specialist support to global pharmaceutical, biotech, and clinical research organizations, spanning…” Source: RevenueBase Database · checked Sep 19, 2026
3	OXB	Partial evidence	Oxford, United KingdomHQ checked Sep 19, 2026	501-1,000	861 contacts →
	Partial evidence “OXB (LSE: OXB) is a global quality and innovation-led contract development and manufacturing organisation (CDMO) in cell and gene therapy with a mission to enable its clients to…” Source: RevenueBase Database · checked Sep 19, 2026
4	Sygnature Discovery	Partial evidence	Nottingham, United KingdomHQ checked Sep 19, 2026	501-1,000	582 contacts →
	Partial evidence “At Sygnature Discovery, a global drug discovery CRO, we create exceptional scientific outcomes.” Source: RevenueBase Database · checked Sep 19, 2026
5	Bespak	Strong evidence	Holmes Chapel, United KingdomHQ checked Sep 19, 2026	1,001-5,000	536 contacts →
	Strong 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 19, 2026
6	O2h Discovery	Partial evidence	Cambridge, United KingdomHQ checked Sep 19, 2026	501-1,000	521 contacts →
	Partial 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 19, 2026
7	CALYX	Indirect evidence	Nottingham, United KingdomHQ checked Sep 19, 2026	1,001-5,000	452 contacts →
	Indirect evidence “Calyx and Invicro are now Perceptive!” Source: RevenueBase Database · checked Sep 19, 2026
8	Veramed	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	501-1,000	438 contacts →
	Indirect evidence “Veramed is a Clinical Research Organization (CRO) that provides expert data management, biostatistics and programming services to the pharmaceutical and biotech industry.” Source: RevenueBase Database · checked Sep 19, 2026
9	Roslinct	Partial evidence	Edinburgh, United KingdomHQ checked Sep 19, 2026	201-500	437 contacts →
	Partial evidence “RoslinCT is a leading global contract development and manufacturing services organization (CDMO) focused on Advanced Cell Therapies.” Source: RevenueBase Database · checked Sep 19, 2026
10	MAC Clinical Research	Indirect evidence	Blackpool, United KingdomHQ checked Sep 19, 2026	201-500	333 contacts →
	Indirect evidence “MAC Clinical Research is a leading full-service, global Contract Research Organisation (CRO) with over 30 years of experience in clinical trial management.” Source: RevenueBase Database · checked Sep 19, 2026
11	Vernalis	Strong evidence	Cambridge, United KingdomHQ checked Sep 19, 2026	51-200	330 contacts →
	Strong 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 19, 2026
12	WEP Clinical	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	201-500	321 contacts →
	Indirect evidence “At WEP Clinical, we operate as a specialist CRO with a proven track record of excellence in designing, managing, and executing Clinical Trials, Expanded Access Programs (EAPs)…” Source: RevenueBase Database · checked Sep 19, 2026
13	Simbec-Orion	Indirect evidence	Merthyr Tydfil, United KingdomHQ checked Sep 19, 2026	201-500	312 contacts →
	Indirect evidence “Our passion for improving patients’ lives motivates us to apply our skills, experience, and knowledge to advance medicine.” Source: RevenueBase Database · checked Sep 19, 2026
14	IDBS	Indirect evidence	Woking, United KingdomHQ checked Sep 19, 2026	201-500	280 contacts →
	Indirect evidence “IDBS helps BioPharma organizations unlock the potential of AI/ML to improve the lives of patients.” Source: RevenueBase Database · checked Sep 19, 2026
15	Hammersmith Medicines Research LTD	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	201-500	230 contacts →
	Indirect evidence “HMR is a Contract Research Organisation (CRO).” Source: RevenueBase Database · checked Sep 19, 2026
16	HVIVO	Strong evidence	London, United KingdomHQ checked Sep 19, 2026	51-200	214 contacts →
	Strong 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 19, 2026
17	Diaceutics PLC	Indirect evidence	Belfast, United KingdomHQ checked Sep 19, 2026	51-200	213 contacts →
	Indirect evidence “At Diaceutics we believe that every patient should have access to the right treatment at the right time.” Source: RevenueBase Database · checked Sep 19, 2026
18	Concept Life Sciences	Indirect evidence	High Peak, United KingdomHQ checked Sep 19, 2026	201-500	209 contacts →
	Indirect 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 19, 2026
19	Illingworth Research Group A Syneos Health Company	Indirect evidence	Macclesfield, United KingdomHQ checked Sep 19, 2026	51-200	208 contacts →
	Indirect evidence “Illingworth Research Group™, a Syneos Health® company, is a leading provider of clinical research home health services, providing highly trained, qualified and experienced…” Source: RevenueBase Database · checked Sep 19, 2026
20	Richmond Pharmacology	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	51-200	198 contacts →
	Indirect evidence “At Richmond, we're on a mission to transform healthcare by delivering faster answers and turning hope into tangible solutions.” Source: RevenueBase Database · checked Sep 19, 2026
21	Cyprotex	Indirect evidence	Macclesfield, United KingdomHQ checked Sep 19, 2026	51-200	192 contacts →
	Indirect evidence “Founded in Cyprotex has grown to become an industry leader in in vitro and in silico ADME-Tox.” Source: RevenueBase Database · checked Sep 19, 2026
22	Quanticate	Indirect evidence	Hitchin, United KingdomHQ checked Sep 19, 2026	201-500	192 contacts →
	Indirect evidence “Quanticate is a leading global data focused clinical research organisation (CRO) primarily focused on the management, analysis and reporting of data from clinical trials and…” Source: RevenueBase Database · checked Sep 19, 2026
23	Touchlight	Indirect evidence	Hampton, United KingdomHQ checked Sep 19, 2026	51-200	188 contacts →
	Indirect evidence “Touchlight is a leading, innovation-driven CDMO pioneering enzymatic GMP DNA production to enable the genetic medicine revolution.” Source: RevenueBase Database · checked Sep 19, 2026
24	Aesica Pharmaceuticals LTD	Partial evidence	Hemel Hempstead, United KingdomHQ checked Sep 19, 2026	1,001-5,000	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, 2026
25	Symbiosis Pharmaceutical Services	Partial evidence	Stirling, United KingdomHQ checked Sep 19, 2026	51-200	140 contacts →
	Partial evidence “Symbiosis Pharmaceutical Services is a contract development and manufacturing organisation (CDMO) that specialises in the GMP manufacture and sterile fill/finish of vials for…” Source: RevenueBase Database · checked Sep 19, 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: drug development service providers. 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 drug development service providers.
Partial evidence: Its own public description names part of drug development service providers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name drug development service providers. 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 561 drug development service providers based in the United Kingdom

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Drug development service providers based in the United Kingdom at a glance

As of Sep 19, 2026

46.1%Verified-email coverage

45.8Average contacts per company

1-10Median size (employees)

22.5%Largest-city concentration · London

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

305

11-50

131

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 561 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 drug development service providers, 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 “drug development service providers”. 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 drug development service providers), 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 drug development service providers, 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, 11,858 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.

Drug development service providers by metro

Drug development service providers in London126
Drug development service providers in Cambridge26

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 drug development service providers, 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 drug development service providers are there based in the United Kingdom?

RevenueBase identified 561 drug development service providers 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 drug development service providers?

London leads with 126 headquartered companies, followed by Cambridge (26) and Nottingham (20).

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 11,858 verified decision-maker contacts tracked across these 561 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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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.