Company lists · Data refreshed September 2026
Top 25 Clinical research staffing agencies based in the United Kingdom
RevenueBase identified 627 company matches for clinical research staffing agencies associated with the United Kingdom as of September 2026 and tracks 12,528 professional contacts across them, including 4,462 with verified work emails. London is the largest hub.
This list covers company matches for clinical research staffing agencies 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 27, 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 clinical research staffing agencies based in the United Kingdom
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 1,197 contacts → | ||||
Exact match “Expanding on their combined 50-year history, Perceptive provides best-in-class specialist support to global pharmaceutical, biotech, and clinical research organizations, spanning…” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 2 | 582 contacts → | ||||
Exact match “At Sygnature Discovery, a global drug discovery CRO, we create exceptional scientific outcomes.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 3 | 452 contacts → | ||||
Exact match “Calyx and Invicro are now Perceptive!” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 4 | 438 contacts → | ||||
Exact match “Veramed is a Clinical Research Organization (CRO) that provides expert data management, biostatistics and programming services to the pharmaceutical and biotech industry.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 5 | 387 contacts → | ||||
Exact match “Phastar is an award-winning specialist biometrics and data science CRO, trusted by pharma, biotech, and medical device companies worldwide.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 6 | 355 contacts → | ||||
Exact match “A24 Group is a leading international provider of medical staffing and personnel management services.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 7 | 333 contacts → | ||||
Exact match “MAC Clinical Research is a leading full-service, global Contract Research Organisation (CRO) with over 30 years of experience in clinical trial management.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 8 | 321 contacts → | ||||
Exact match “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)…” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 9 | 312 contacts → | ||||
Exact match “Our passion for improving patients’ lives motivates us to apply our skills, experience, and knowledge to advance medicine.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 10 | 216 contacts → | ||||
Exact match “Total Assist Group is a multi-award winning recruitment agency, specialising in filling and providing temporary and permanent placements across the medical, nursing, education…” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 11 | 208 contacts → | ||||
Exact match “Illingworth Research Group™, a Syneos Health® company, is a leading provider of clinical research home health services, providing highly trained, qualified and experienced…” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 12 | 203 contacts → | ||||
Exact match “At Proclinical Staffing, our life science recruitment services support our partners with permanent and contract vacancies by connecting them with specialist talent across the…” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 13 | 198 contacts → | ||||
Exact match “At Richmond, we're on a mission to transform healthcare by delivering faster answers and turning hope into tangible solutions.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 14 | 192 contacts → | ||||
Exact match “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…” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 15 | 186 contacts → | ||||
Exact match “Right Nurse, Right Now Greenstaff Medical is a specialist healthcare staffing agency who have been providing high-quality talent across the UK since 2014.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 16 | 173 contacts → | ||||
Exact match “CK Group has officially rebranded to Talentmark.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 17 | 136 contacts → | ||||
Exact match “Clintec, an IQVIA company, is an innovative, medium-sized, global Contract Research Organization providing global full and functional service support to the pharmaceutical…” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 18 | 101 contacts → | ||||
Exact match “Acton Banks Healthcare is a specialist healthcare recruitment agency based in the West Midlands.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 19 | 97 contacts → | ||||
Exact match “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.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 20 | 95 contacts → | ||||
Exact match “Innovative Trials was built around a simple belief, patient recruitment works better when people feel supported.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 21 | 92 contacts → | ||||
Exact match “Compass Associates support the independent and investor backed Senior Living, Healthcare, Adult and Children’s Care, and Behavioral Health sectors in the UK and US, on both a…” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 22 | 87 contacts → | ||||
Exact match “great people, great work, real results Sequani’s heritage spans more than 50 years when a company called Toxicol Laboratories opened for business in London.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 23 | 82 contacts → | ||||
Exact match “MedGen is the leading healthcare recruitment agency in the UK specialised in placing healthcare professionals nationwide.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 24 | 77 contacts → | ||||
Exact match “We specialise in life science recruitment, permanent and contract and research facility management and consultancy services.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 25 | 70 contacts → | ||||
Exact match “Since 2008, i-Pharm’s independent, expert, and ethical approach to procuring talent has helped power the pioneering progress made by Pharmaceutical, Biotech and MedTech companies…” Recorded in the RevenueBase company graph · Sep 27, 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 “clinical research staffing agencies”. 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 25 of 627 clinical research staffing agencies based in the United Kingdom
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Clinical research staffing agencies based in the United Kingdom at a glance
As of Sep 27, 2026Companies by employee count
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 627 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 “clinical research staffing agencies” 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 4,462 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 27, 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 “clinical research staffing agencies”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many clinical research staffing agencies are there based in the United Kingdom?
RevenueBase identified 627 company matches for clinical research staffing agencies 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?
Perceptive INC tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.
Which city has the most clinical research staffing agencies?
London leads with 200 company records, followed by Manchester (26) and Glasgow (15).
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 4,462 professional contacts with verified work emails tracked across these 627 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 27, 2026.
Ready to reach these companies? Verified emails and direct dials for all 627 clinical research staffing agencies based in the United Kingdom. Start with a free account, no credit card.
Download this list →Related lists
Clinical research staffing agencies by geography
- Clinical research staffing agencies based in Ahmedabad, India
- Clinical research staffing agencies based in Hyderabad, India
- Clinical research staffing agencies based in Atlanta, United States
- Clinical research staffing agencies based in Austin, United States
- Clinical research staffing agencies based in Boston, United States
- Clinical research staffing agencies based in Chicago, United States
- Clinical research staffing agencies based in Dallas, United States
- Clinical research staffing agencies based in Houston, United States
- Clinical research staffing agencies based in Los Angeles, United States
- Clinical research staffing agencies based in Miami, United States
- Clinical research staffing agencies based in New York, United States
- Clinical research staffing agencies based in Orlando, United States
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.
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Clinical research staffing agencies based in Ahmedabad, India
- Clinical research staffing agencies based in Hyderabad, India
- Clinical research staffing agencies based in Atlanta, United States
- Clinical research staffing agencies based in Austin, United States
- Clinical research staffing agencies based in Boston, United States
- Clinical research staffing agencies based in Chicago, United States
Company intelligence · public preview
Top 25 clinical research staffing agencies based in the United Kingdom
Find companies in any niche.
Describe the businesses you want in your own words. RevenueBase SmartSearch matches company descriptions by meaning.
RevenueBase records 627 matching company records for clinical research staffing agencies based in the United Kingdom, with 12,528 tracked contacts and 4,462 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: September 27, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 clinical research staffing agencies based in the United Kingdom
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 |  Perceptive INCperceptive.comHQ: London, United KingdomReported employees: 1,001-5,000 | London, United Kingdom | 1,001-5,000 | Exact match | 1,197 contacts → |
“Expanding on their combined 50-year history, Perceptive provides best-in-class specialist support to global pharmaceutical, biotech, and clinical research organizations, spanning…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 |  Sygnature Discoverysygnaturediscovery.comHQ: Nottingham, United KingdomReported employees: 501-1,000 | Nottingham, United Kingdom | 501-1,000 | Exact match | 582 contacts → |
“At Sygnature Discovery, a global drug discovery CRO, we create exceptional scientific outcomes.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 |  CALYXcalyx.aiHQ: Nottingham, United KingdomReported employees: 1,001-5,000 | Nottingham, United Kingdom | 1,001-5,000 | Exact match | 452 contacts → |
“Calyx and Invicro are now Perceptive!” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 |  Veramedveramed.comHQ: London, United KingdomReported employees: 501-1,000 | London, United Kingdom | 501-1,000 | Exact match | 438 contacts → |
“Veramed is a Clinical Research Organization (CRO) that provides expert data management, biostatistics and programming services to the pharmaceutical and biotech industry.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 |  Phastarphastar.comHQ: London, United KingdomReported employees: 501-1,000 | London, United Kingdom | 501-1,000 | Exact match | 387 contacts → |
“Phastar is an award-winning specialist biometrics and data science CRO, trusted by pharma, biotech, and medical device companies worldwide.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 |  A24group Medical Staffing Agenciesa24group.comHQ: Sutton, United KingdomReported employees: 201-500 | Sutton, United Kingdom | 201-500 | Exact match | 355 contacts → |
“A24 Group is a leading international provider of medical staffing and personnel management services.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 |  MAC Clinical Researchmacplc.comHQ: Blackpool, United KingdomReported employees: 201-500 | Blackpool, United Kingdom | 201-500 | Exact match | 333 contacts → |
“MAC Clinical Research is a leading full-service, global Contract Research Organisation (CRO) with over 30 years of experience in clinical trial management.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 |  WEP Clinicalwepclinical.comHQ: London, United KingdomReported employees: 201-500 | London, United Kingdom | 201-500 | Exact match | 321 contacts → |
“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)…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 |  Simbec-Orionsimbecorion.comHQ: Merthyr Tydfil, United KingdomReported employees: 201-500 | Merthyr Tydfil, United Kingdom | 201-500 | Exact match | 312 contacts → |
“Our passion for improving patients’ lives motivates us to apply our skills, experience, and knowledge to advance medicine.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 |  Total Assist Grouptotalassist.co.ukHQ: Romford, United KingdomReported employees: 51-200 | Romford, United Kingdom | 51-200 | Exact match | 216 contacts → |
“Total Assist Group is a multi-award winning recruitment agency, specialising in filling and providing temporary and permanent placements across the medical, nursing, education…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 |  Illingworth Research Group A Syneos Health Companyillingworthresearch.comHQ: Macclesfield, United KingdomReported employees: 51-200 | Macclesfield, United Kingdom | 51-200 | Exact match | 208 contacts → |
“Illingworth Research Group™, a Syneos Health® company, is a leading provider of clinical research home health services, providing highly trained, qualified and experienced…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 |  Proclinical Staffingproclinical.comHQ: City Of London, United KingdomReported employees: 51-200 | City Of London, United Kingdom | 51-200 | Exact match | 203 contacts → |
“At Proclinical Staffing, our life science recruitment services support our partners with permanent and contract vacancies by connecting them with specialist talent across the…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 |  Richmond Pharmacologyrichmondpharmacology.comHQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 198 contacts → |
“At Richmond, we're on a mission to transform healthcare by delivering faster answers and turning hope into tangible solutions.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 |  Quanticatequanticate.comHQ: Hitchin, United KingdomReported employees: 201-500 | Hitchin, United Kingdom | 201-500 | Exact match | 192 contacts → |
“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…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 |  Greenstaff Medical UKgreenstaffmedical.co.ukHQ: Bristol, United KingdomReported employees: 51-200 | Bristol, United Kingdom | 51-200 | Exact match | 186 contacts → |
“Right Nurse, Right Now Greenstaff Medical is a specialist healthcare staffing agency who have been providing high-quality talent across the UK since 2014.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 |  CK Groupckgroup.co.ukHQ: Chesterfield, United KingdomReported employees: 51-200 | Chesterfield, United Kingdom | 51-200 | Exact match | 173 contacts → |
“CK Group has officially rebranded to Talentmark.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 |  Clintecclintec.comHQ: Glasgow, United KingdomReported employees: 501-1,000 | Glasgow, United Kingdom | 501-1,000 | Exact match | 136 contacts → |
“Clintec, an IQVIA company, is an innovative, medium-sized, global Contract Research Organization providing global full and functional service support to the pharmaceutical…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 |  Acton Banks Healthcare Staffingactonbanks.co.ukHQ: Wolverhampton, United KingdomReported employees: 11-50 | Wolverhampton, United Kingdom | 11-50 | Exact match | 101 contacts → |
“Acton Banks Healthcare is a specialist healthcare recruitment agency based in the West Midlands.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | HQ: Manchester, United KingdomReported employees: 51-200 | Manchester, United Kingdom | 51-200 | Exact match | 97 contacts → |
“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.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 |  Innovative Trialsinnovativetrials.comHQ: Letchworth Garden City, United KingdomReported employees: 51-200 | Letchworth Garden City, United Kingdom | 51-200 | Exact match | 95 contacts → |
“Innovative Trials was built around a simple belief, patient recruitment works better when people feel supported.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 |  Compass Associatescompass-associates.comHQ: Portsmouth, United KingdomReported employees: 51-200 | Portsmouth, United Kingdom | 51-200 | Exact match | 92 contacts → |
“Compass Associates support the independent and investor backed Senior Living, Healthcare, Adult and Children’s Care, and Behavioral Health sectors in the UK and US, on both a…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 |  Sequanisequani.comHQ: Ledbury, United KingdomReported employees: 51-200 | Ledbury, United Kingdom | 51-200 | Exact match | 87 contacts → |
“great people, great work, real results Sequani’s heritage spans more than 50 years when a company called Toxicol Laboratories opened for business in London.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 |  Medgen Healthcaremedgen.co.ukHQ: Sutton, United KingdomReported employees: 51-200 | Sutton, United Kingdom | 51-200 | Exact match | 82 contacts → |
“MedGen is the leading healthcare recruitment agency in the UK specialised in placing healthcare professionals nationwide.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 |  Agenda Life Sciencesagendalifesciences.comHQ: None, United KingdomReported employees: 51-200 | None, United Kingdom | 51-200 | Exact match | 77 contacts → |
“We specialise in life science recruitment, permanent and contract and research facility management and consultancy services.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 |  I-Pharm Consultingi-pharmconsulting.comHQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 70 contacts → |
“Since 2008, i-Pharm’s independent, expert, and ethical approach to procuring talent has helped power the pioneering progress made by Pharmaceutical, Biotech and MedTech companies…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 627 company matches
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Clinical research staffing agencies: dataset insights
September 27, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
625 records in the displayed employee bands.
2 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
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 627 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: September 27, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Questions about this company list
What does Exact match mean for clinical research staffing agencies?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many clinical research staffing agencies did RevenueBase find based in the United Kingdom?
The saved snapshot records 627 matching company records, 12,528 tracked contacts and 4,462 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: September 27, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
Related lists
Clinical research staffing agencies by geography
- Clinical research staffing agencies based in Ahmedabad, India
- Clinical research staffing agencies based in Hyderabad, India
- Clinical research staffing agencies based in Atlanta, United States
- Clinical research staffing agencies based in Austin, United States
- Clinical research staffing agencies based in Boston, United States
- Clinical research staffing agencies based in Chicago, United States
- Clinical research staffing agencies based in Dallas, United States
- Clinical research staffing agencies based in Houston, United States
- Clinical research staffing agencies based in Los Angeles, United States
- Clinical research staffing agencies based in Miami, United States
- Clinical research staffing agencies based in New York, United States
- Clinical research staffing agencies based in Orlando, United States
Cite this list
RevenueBase Data Team. Top 25 clinical research staffing agencies based in the United Kingdom. Snapshot: September 27, 2026. https://revenuebase.ai/companies/clinical-research-staffing-agencies/united-kingdom.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Clinical research staffing agencies based in Ahmedabad, India
- Clinical research staffing agencies based in Hyderabad, India
- Clinical research staffing agencies based in Atlanta, United States
- Clinical research staffing agencies based in Austin, United States
- Clinical research staffing agencies based in Boston, United States
- Clinical research staffing agencies based in Chicago, United States
Company intelligence · public preview
Top 25 clinical research staffing agencies based in the United Kingdom
RevenueBase records 627 matching company records for clinical research staffing agencies based in the United Kingdom, with 12,528 tracked contacts and 4,462 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: September 27, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 clinical research staffing agencies based in the United Kingdom
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 | Perceptive INCperceptive.com HQ: London, United KingdomReported employees: 1,001-5,000 | London, United Kingdom | 1,001-5,000 | Exact match | 1,197 contacts → |
“Expanding on their combined 50-year history, Perceptive provides best-in-class specialist support to global pharmaceutical, biotech, and clinical research organizations, spanning…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | Sygnature Discoverysygnaturediscovery.com HQ: Nottingham, United KingdomReported employees: 501-1,000 | Nottingham, United Kingdom | 501-1,000 | Exact match | 582 contacts → |
“At Sygnature Discovery, a global drug discovery CRO, we create exceptional scientific outcomes.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | CALYXcalyx.ai HQ: Nottingham, United KingdomReported employees: 1,001-5,000 | Nottingham, United Kingdom | 1,001-5,000 | Exact match | 452 contacts → |
“Calyx and Invicro are now Perceptive!” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | Veramedveramed.com HQ: London, United KingdomReported employees: 501-1,000 | London, United Kingdom | 501-1,000 | Exact match | 438 contacts → |
“Veramed is a Clinical Research Organization (CRO) that provides expert data management, biostatistics and programming services to the pharmaceutical and biotech industry.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | Phastarphastar.com HQ: London, United KingdomReported employees: 501-1,000 | London, United Kingdom | 501-1,000 | Exact match | 387 contacts → |
“Phastar is an award-winning specialist biometrics and data science CRO, trusted by pharma, biotech, and medical device companies worldwide.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | A24group Medical Staffing Agenciesa24group.com HQ: Sutton, United KingdomReported employees: 201-500 | Sutton, United Kingdom | 201-500 | Exact match | 355 contacts → |
“A24 Group is a leading international provider of medical staffing and personnel management services.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | MAC Clinical Researchmacplc.com HQ: Blackpool, United KingdomReported employees: 201-500 | Blackpool, United Kingdom | 201-500 | Exact match | 333 contacts → |
“MAC Clinical Research is a leading full-service, global Contract Research Organisation (CRO) with over 30 years of experience in clinical trial management.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | WEP Clinicalwepclinical.com HQ: London, United KingdomReported employees: 201-500 | London, United Kingdom | 201-500 | Exact match | 321 contacts → |
“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)…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | Simbec-Orionsimbecorion.com HQ: Merthyr Tydfil, United KingdomReported employees: 201-500 | Merthyr Tydfil, United Kingdom | 201-500 | Exact match | 312 contacts → |
“Our passion for improving patients’ lives motivates us to apply our skills, experience, and knowledge to advance medicine.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | Total Assist Grouptotalassist.co.uk HQ: Romford, United KingdomReported employees: 51-200 | Romford, United Kingdom | 51-200 | Exact match | 216 contacts → |
“Total Assist Group is a multi-award winning recruitment agency, specialising in filling and providing temporary and permanent placements across the medical, nursing, education…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | Illingworth Research Group A Syneos Health Companyillingworthresearch.com HQ: Macclesfield, United KingdomReported employees: 51-200 | Macclesfield, United Kingdom | 51-200 | Exact match | 208 contacts → |
“Illingworth Research Group™, a Syneos Health® company, is a leading provider of clinical research home health services, providing highly trained, qualified and experienced…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | Proclinical Staffingproclinical.com HQ: City Of London, United KingdomReported employees: 51-200 | City Of London, United Kingdom | 51-200 | Exact match | 203 contacts → |
“At Proclinical Staffing, our life science recruitment services support our partners with permanent and contract vacancies by connecting them with specialist talent across the…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | Richmond Pharmacologyrichmondpharmacology.com HQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 198 contacts → |
“At Richmond, we're on a mission to transform healthcare by delivering faster answers and turning hope into tangible solutions.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | Quanticatequanticate.com HQ: Hitchin, United KingdomReported employees: 201-500 | Hitchin, United Kingdom | 201-500 | Exact match | 192 contacts → |
“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…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | Greenstaff Medical UKgreenstaffmedical.co.uk HQ: Bristol, United KingdomReported employees: 51-200 | Bristol, United Kingdom | 51-200 | Exact match | 186 contacts → |
“Right Nurse, Right Now Greenstaff Medical is a specialist healthcare staffing agency who have been providing high-quality talent across the UK since 2014.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | CK Groupckgroup.co.uk HQ: Chesterfield, United KingdomReported employees: 51-200 | Chesterfield, United Kingdom | 51-200 | Exact match | 173 contacts → |
“CK Group has officially rebranded to Talentmark.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | Clintecclintec.com HQ: Glasgow, United KingdomReported employees: 501-1,000 | Glasgow, United Kingdom | 501-1,000 | Exact match | 136 contacts → |
“Clintec, an IQVIA company, is an innovative, medium-sized, global Contract Research Organization providing global full and functional service support to the pharmaceutical…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | Acton Banks Healthcare Staffingactonbanks.co.uk HQ: Wolverhampton, United KingdomReported employees: 11-50 | Wolverhampton, United Kingdom | 11-50 | Exact match | 101 contacts → |
“Acton Banks Healthcare is a specialist healthcare recruitment agency based in the West Midlands.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | HQ: Manchester, United KingdomReported employees: 51-200 | Manchester, United Kingdom | 51-200 | Exact match | 97 contacts → |
“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.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | Innovative Trialsinnovativetrials.com HQ: Letchworth Garden City, United KingdomReported employees: 51-200 | Letchworth Garden City, United Kingdom | 51-200 | Exact match | 95 contacts → |
“Innovative Trials was built around a simple belief, patient recruitment works better when people feel supported.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | Compass Associatescompass-associates.com HQ: Portsmouth, United KingdomReported employees: 51-200 | Portsmouth, United Kingdom | 51-200 | Exact match | 92 contacts → |
“Compass Associates support the independent and investor backed Senior Living, Healthcare, Adult and Children’s Care, and Behavioral Health sectors in the UK and US, on both a…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | Sequanisequani.com HQ: Ledbury, United KingdomReported employees: 51-200 | Ledbury, United Kingdom | 51-200 | Exact match | 87 contacts → |
“great people, great work, real results Sequani’s heritage spans more than 50 years when a company called Toxicol Laboratories opened for business in London.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | Medgen Healthcaremedgen.co.uk HQ: Sutton, United KingdomReported employees: 51-200 | Sutton, United Kingdom | 51-200 | Exact match | 82 contacts → |
“MedGen is the leading healthcare recruitment agency in the UK specialised in placing healthcare professionals nationwide.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | Agenda Life Sciencesagendalifesciences.com HQ: None, United KingdomReported employees: 51-200 | None, United Kingdom | 51-200 | Exact match | 77 contacts → |
“We specialise in life science recruitment, permanent and contract and research facility management and consultancy services.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 | I-Pharm Consultingi-pharmconsulting.com HQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 70 contacts → |
“Since 2008, i-Pharm’s independent, expert, and ethical approach to procuring talent has helped power the pioneering progress made by Pharmaceutical, Biotech and MedTech companies…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
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Clinical research staffing agencies: dataset insights
September 27, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
625 records in the displayed employee bands.
2 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
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 627 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: September 27, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Questions about this company list
What does Exact match mean for clinical research staffing agencies?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many clinical research staffing agencies did RevenueBase find based in the United Kingdom?
The saved snapshot records 627 matching company records, 12,528 tracked contacts and 4,462 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: September 27, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
Related lists
Clinical research staffing agencies by geography
- Clinical research staffing agencies based in Ahmedabad, India
- Clinical research staffing agencies based in Hyderabad, India
- Clinical research staffing agencies based in Atlanta, United States
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- Clinical research staffing agencies based in Boston, United States
- Clinical research staffing agencies based in Chicago, United States
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- Clinical research staffing agencies based in Houston, United States
- Clinical research staffing agencies based in Los Angeles, United States
- Clinical research staffing agencies based in Miami, United States
- Clinical research staffing agencies based in New York, United States
- Clinical research staffing agencies based in Orlando, United States
Cite this list
RevenueBase Data Team. Top 25 clinical research staffing agencies based in the United Kingdom. Snapshot: September 27, 2026. https://revenuebase.ai/companies/clinical-research-staffing-agencies/united-kingdom.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
More company lists
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- Clinical research staffing agencies based in Ahmedabad, India
- Clinical research staffing agencies based in Hyderabad, India
- Clinical research staffing agencies based in Atlanta, United States
- Clinical research staffing agencies based in Austin, United States
- Clinical research staffing agencies based in Boston, United States
- Clinical research staffing agencies based in Chicago, United States