Company lists · Data refreshed September 2026

Top 25 Phase 1 clinical trial companies based in the United Kingdom

Name: Phase 1 clinical trial 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 69 companies tracked

RevenueBase identified 69 phase 1 clinical trial companies headquartered in the United Kingdom as of September 2026 and tracks 3,656 professional contacts across them, including 1,483 with verified work emails. London is the largest hub.

This list covers phase 1 clinical trial 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

69Companies

3,656Contacts tracked

1,483Verified emails

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The 25 largest phase 1 clinical trial companies based in the United Kingdom

Ranked by team size

Top 25 of 69 phase 1 clinical trial 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 phase 1 clinical trial 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	Perceptive INC	Partial evidence	London, United KingdomHQ checked Sep 17, 2026	1,001-5,000	1,197 contacts →
	Partial 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 17, 2026
2	Simbec-Orion	Indirect evidence	Merthyr Tydfil, United KingdomHQ checked Sep 17, 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 17, 2026
3	Hammersmith Medicines Research LTD	Indirect evidence	London, United KingdomHQ checked Sep 17, 2026	201-500	230 contacts →
	Indirect evidence “HMR is a Contract Research Organisation (CRO).” Source: RevenueBase Database · checked Sep 17, 2026
4	HVIVO	Strong evidence	London, United KingdomHQ checked Sep 17, 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 17, 2026
5	Richmond Pharmacology	Indirect evidence	London, United KingdomHQ checked Sep 17, 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 17, 2026
6	Medicines Evaluation Unit Ltd, An Iqvia Business	Indirect evidence	Manchester, United KingdomHQ checked Sep 17, 2026	51-200	97 contacts →
	Indirect evidence “The Medicines Evaluation Unit (MEU) Ltd, an IQVIA business, is one of the UK’s leading contract research organisations, a facility where commitment to excellence is paramount.” Source: RevenueBase Database · checked Sep 17, 2026
7	Protas	Strong evidence	London, United KingdomHQ checked Sep 17, 2026	51-200	57 contacts →
	Strong evidence “Protas is transforming clinical trials for the benefit of patients worldwide.” Source: RevenueBase Database · checked Sep 17, 2026
8	Ellipses Pharma	Partial evidence	London, United KingdomHQ checked Sep 17, 2026	51-200	40 contacts →
	Partial evidence “Ellipses Pharma is an international drug development company, focused exclusively on the advancement of innovative cancer treatments through the clinic.” Source: RevenueBase Database · checked Sep 17, 2026
9	Clinvigilant Research	Indirect evidence	Dartford, United KingdomHQ checked Sep 17, 2026	51-200	25 contacts →
	Indirect evidence “Clinvigilant Research is a leading provider of comprehensive services to the life sciences industry, specializing in Contract Research Organization (CRO) services, eClinical…” Source: RevenueBase Database · checked Sep 17, 2026
10	Cro-Solutions , An Iqvia Business	Strong evidence	Wythenshawe, United KingdomHQ checked Sep 17, 2026	11-50	19 contacts →
	Strong evidence “We are proud to offer our clients a single solution for our clients' clinical trial programmes.” Source: RevenueBase Database · checked Sep 17, 2026
11	Avillion Life Sciences	Partial evidence	London, United KingdomHQ checked Sep 17, 2026	11-50	15 contacts →
	Partial evidence “A drug development company with an innovative model for Clinical Development.” Source: RevenueBase Database · checked Sep 17, 2026
12	Paspigioni	Strong evidence	London, United KingdomHQ checked Sep 17, 2026	11-50	12 contacts →
	Strong evidence “Paspigioni is a full-service contract research organisation dedicated to excellence in clinical trials of pharmaceutical, biotech, and medical devices.” Source: RevenueBase Database · checked Sep 17, 2026
13	Elpida Clinical Trials	Strong evidence	London, United KingdomHQ checked Sep 17, 2026	11-50	10 contacts →
	Strong evidence “Elpida Clinical Trials is a clinical trials company, helping pharmaceutical companies bring exciting breakthrough treatments into mainstream medicine, through safe and…” Source: RevenueBase Database · checked Sep 17, 2026
14	Clinicology	Partial evidence	Guildford, United KingdomHQ checked Sep 17, 2026	201-500	7 contacts →
	Partial evidence “Clinicology is the UK subsidiary of FGK Clinical Research, a trusted full-service CRO, partnering with pharmaceutical, biotechnology, and medical device companies to transform…” Source: RevenueBase Database · checked Sep 17, 2026
15	Acceler8 Clinical Research	Partial evidence	Cheshire, United KingdomHQ checked Sep 17, 2026	11-50	7 contacts →
	Partial evidence “Acceler8 Clinical Research is a global provider of biopharmaceutical services.” Source: RevenueBase Database · checked Sep 17, 2026
16	Karma Oncology	Partial evidence	East Kilbride, United KingdomHQ checked Sep 17, 2026	11-50	6 contacts →
	Partial evidence “Karma Oncology is an oncology specialized, well-established unique clinical development company which was incorporated in 2012.” Source: RevenueBase Database · checked Sep 17, 2026
17	Onorach Clinical	Strong evidence	Dundee, United KingdomHQ checked Sep 17, 2026	11-50	6 contacts →
	Strong evidence “Onorach manage Phase I to IV clinical research studies for drug products (including biologicals (stem cells)), nutraceutical products and medical devices using a tailored…” Source: RevenueBase Database · checked Sep 17, 2026
18	C-Tric	Partial evidence	Derry/londonderry, United KingdomHQ checked Sep 17, 2026	1-10	5 contacts →
	Partial evidence “C-TRIC provides specialist work space and services for pharmaceutical industry companies, clinical researchers and academic researchers.” Source: RevenueBase Database · checked Sep 17, 2026
19	Panacea Patient Recruitment	Strong evidence	Altrincham, United KingdomHQ checked Sep 17, 2026	11-50	5 contacts →
	Strong evidence “Panacea is a global leader in patient recruitment for clinical trials, connecting pharmaceutical companies, biotech firms, and CROs with qualified participants to accelerate…” Source: RevenueBase Database · checked Sep 17, 2026
20	Centrical Global Limited	Strong evidence	Brinkworth, United KingdomHQ checked Sep 17, 2026	1-10	4 contacts →
	Strong evidence “Centrical Global Limited is an independent company focused on the provision of clinical trial feasibility assessments and clinical trial risk management covering any stage of…” Source: RevenueBase Database · checked Sep 17, 2026
21	Competitive Drug Development International LTD Cddi	Indirect evidence	London, United KingdomHQ checked Sep 17, 2026	1-10	3 contacts →
	Indirect evidence “CDDI is a specialist bio-medical consulting company based in London and Barcelona and founded in 2009 by R&D executives from top Pharma companies.” Source: RevenueBase Database · checked Sep 17, 2026
22	George Clinical UK Limited	Indirect evidence	Surrey, United KingdomHQ checked Sep 17, 2026	51-200	3 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 17, 2026
23	Target To Treatment TTT Consulting LTD	Indirect evidence	Stevenage, United KingdomHQ checked Sep 17, 2026	1-10	2 contacts →
	Indirect evidence “Target to Treatment Consulting Ltd is an independent consulting firm that provides services to Academic Institutions, BioTech companies and Big Pharma.” Source: RevenueBase Database · checked Sep 17, 2026
24	Disulfican LTD	Indirect evidence	Wolverhampton, United KingdomHQ checked Sep 17, 2026	1-10	2 contacts →
	Indirect evidence “We are developing a groundbreaking new drug that’s going to revolutionize the treatment of aggressive cancers.” Source: RevenueBase Database · checked Sep 17, 2026
25	Intelligent Clinical LTD	Partial evidence	Glasgow, United KingdomHQ checked Sep 17, 2026	1-10	2 contacts →
	Partial evidence “Intelligent Clinical is a Clinical Research Organisation (CRO), based in Glasgow, UK.” 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: phase 1 clinical trial 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 phase 1 clinical trial companies.
Partial evidence: Its own public description names part of phase 1 clinical trial companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name phase 1 clinical trial 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 69 phase 1 clinical trial companies based in the United Kingdom

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Phase 1 clinical trial companies based in the United Kingdom at a glance

As of Sep 17, 2026

40.6%Verified-email coverage

53.0Average contacts per company

11-50Median size (employees)

34.8%Largest-city concentration · London

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

1,001-5,000

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 69 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 phase 1 clinical trial 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 “phase 1 clinical trial 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 phase 1 clinical trial 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 phase 1 clinical trial 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, 1,483 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.

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 phase 1 clinical trial 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 phase 1 clinical trial companies are there based in the United Kingdom?

RevenueBase identified 69 phase 1 clinical trial 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?

Perceptive INC, headquartered in London, tops this list with the largest team on record.

Which city has the most phase 1 clinical trial companies?

London leads with 24 headquartered companies, followed by Bedford (2) and Cambridge (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 1,483 verified decision-maker contacts tracked across these 69 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.