Company lists · Data refreshed September 2026
Top 25 Patient recruitment firms based in the United Kingdom
RevenueBase identified 141 patient recruitment firms headquartered in the United Kingdom as of September 2026 and tracks 5,654 professional contacts across them, including 1,885 with verified work emails and 829 with mobile numbers. London is the largest hub.
This list covers patient recruitment firms 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, how directly it supports the match, and when it was last checked. Data refreshed September 5, 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.
The 25 largest patient recruitment firms based in the United Kingdom
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 1,197 | ||||
“Expanding on their combined 50-year history, Perceptive provides best-in-class specialist support to global pharmaceutical, biotech, and clinical research organizations, spanning…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 2 | 452 | ||||
“Calyx and Invicro are now Perceptive!” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 3 | WEP ClinicalIndirect evidence | 321 | |||
“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: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 4 | 312 | ||||
“Our passion for improving patients’ lives motivates us to apply our skills, experience, and knowledge to advance medicine.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 5 | Illingworth Research Group A Syneos Health CompanyIndirect evidence | 208 | |||
“Illingworth Research Group™, a Syneos Health® company, is a leading provider of clinical research home health services, providing highly trained, qualified and experienced…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 6 | 198 | ||||
“At Richmond, we're on a mission to transform healthcare by delivering faster answers and turning hope into tangible solutions.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 7 | MdgroupPartial evidence | 139 | |||
“We’re on a mission to make life better for patients taking part in clinical trials around the world-and for the caregivers who support them.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 8 | 127 | ||||
“Panthera is an independent SMO working with pharmaceutical and contract research organizations to find the right patient, for the right trial, at the right time through the…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 9 | Innovative TrialsStrong evidence | 95 | |||
“Innovative Trials was built around a simple belief, patient recruitment works better when people feel supported.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 10 | MedicysPartial evidence | 43 | |||
“Medicys is a leading provider of healthcare fieldwork solutions, specialising in recruiting patients and healthcare professionals (HCPs) for Health Economics and Outcomes Research…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 11 | 42 | ||||
“ARC's purpose is to expedite access to precision medicine clinical trials for patients globally.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 12 | 39 | ||||
“Described as "A centre of excellence" by the MHRA - ESMS Global LTD, formerly part of the Guy’s Poisons Unit, is a niche service provider based in central London.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 13 | 36 | ||||
“Founded in 2019, Apsida Life Science is a specialist recruitment business Headquartered in Surrey, with offices in London UK, Boston USA and Pretoria, SA.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 14 | PVR People. Value. ResearchPartial evidence | 35 | |||
“End-to-end CRO services Strategic consultation for all aspects of your trial Customizing an optimal trial design Fit-for-purpose data End-to-end patient focused services Quick…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 15 | GKAIndirect evidence | 33 | |||
“GKA is a specialist medical market research fieldwork agency based in the UK.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 16 | 32 | ||||
“Global Perspectives, an IQVIA business, specialize in engaging large numbers of hard-to-reach patients, healthcare professionals and payers to take part in scientific studies.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 17 | Synergy Medical RecruitmentPartial evidence | 28 | |||
“Since 1997 Synergy Medical has been providing nationwide recruitment support across specialist healthcare sectors; matching the right people to the right roles to deliver the best…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 18 | 25 | ||||
“Clinvigilant Research is a leading provider of comprehensive services to the life sciences industry, specializing in Contract Research Organization (CRO) services, eClinical…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 19 | 23 | ||||
“ROKC is an innovative CRO specialising in the bespoke design, management and delivery of Pan European multi-centre clinical trials to commercial, academic and non governmental…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 20 | LDA Research LTDIndirect evidence | 16 | |||
“LDA Research are experts in providing a comprehensive fieldwork service, specialising in the pharmaceutical and medical sectors.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 21 | PaspigioniIndirect evidence | 12 | |||
“Paspigioni is a full-service contract research organisation dedicated to excellence in clinical trials of pharmaceutical, biotech, and medical devices.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 22 | O4 Research LTDIndirect evidence | 12 | |||
“Since our establishment in 2009, O4 Research has been providing novel, intelligent Clinical Research Solutions proven to deliver studies for our Pharmaceutical, Biotech and…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 23 | Tcr-SolutionsIndirect evidence | 11 | |||
“Tailored Clinical Research Solutions (TCRS) is a CRO whose founders have detailed knowledge of the clinical research landscape across Europe and the US.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 24 | Momentum Pharma LTDIndirect evidence | 11 | |||
“Momentum-Pharma was established with the aim of helping Biotechs, CROs and Pharmaceutical companies supplement their teams.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 25 | 4 Medical Clinical Solutions 4mcsIndirect evidence | 10 | |||
“4MCS is a privately owned Dedicated Clinical Research Sites in the UK with Head Office in Manchester (UK).” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
Showing 25 of 141 patient recruitment firms based in the United Kingdom
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Patient recruitment firms based in the United Kingdom at a glance
As of Sep 5, 2026Companies by employee count
Verified emails by last verification
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 patient recruitment firms, so some rows will be adjacent to the category rather than pure plays. The description and evidence 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 SmartSearch, 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 “patient recruitment firms”. Matching reads each company's description, not its industry code or its name.
- What we exclude
- Companies whose own description does not clearly place them among patient recruitment firms, 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 an evidence 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, 1,885 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 5, 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.
Patient recruitment firms by metro
- Patient recruitment firms in London39
Frequently asked
How many patient recruitment firms are there based in the United Kingdom?
RevenueBase identified 141 patient recruitment firms 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 patient recruitment firms?
London leads with 39 headquartered companies, followed by Manchester (7) and Nottingham (4).
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 1,885 verified decision-maker contacts tracked across these 141 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 5, 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.
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