Company lists · Data refreshed September 2026

Top 25 Phase 1 clinical trial sites worldwide

Name: Phase 1 clinical trial sites worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 2,160 companies tracked

RevenueBase identified 2,160 phase 1 clinical trial sites worldwide as of September 2026 and tracks 138,045 professional contacts across them, including 58,626 with verified work emails and 0 with mobile numbers. The United States is the largest market and Miami the largest hub.

This list covers phase 1 clinical trial sites worldwide, 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. Country and city lists for phase 1 clinical trial sites follow the table.

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

2,160Companies

138,045Contacts tracked

58,626Verified emails

0Mobile numbers

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The 25 largest phase 1 clinical trial sites worldwide

Ranked by team size

Top 25 of 2,160 phase 1 clinical trial sites worldwide, 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 sites: 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	PPD	Partial evidence	Waltham, MA, United StatesHQ checked Sep 17, 2026	10001+	20,530 contacts →
	Partial evidence “The PPD™ clinical research business of Thermo Fisher Scientific, the world leader in serving science, enables customers to accelerate innovation and drug development through…” Source: RevenueBase Database · checked Sep 17, 2026
2	Fortrea	Partial evidence	Research Triangle Park, NC, United StatesHQ checked Sep 17, 2026	10001+	10,632 contacts →
	Partial evidence “Fortrea (Nasdaq: FTRE) is a leading global clinical research organization (CRO) dedicated to providing innovative clinical development solutions to the life sciences industry.” Source: RevenueBase Database · checked Sep 17, 2026
3	Medpace	Strong evidence	Cincinnati, OH, United StatesHQ checked Sep 17, 2026	5,001-10,000	5,960 contacts →
	Strong evidence “Medpace is a scientifically-driven, global, full-service clinical contract research organization (CRO) providing Phase I-IV clinical development services to the biotechnology…” Source: RevenueBase Database · checked Sep 17, 2026
4	Covance	Indirect evidence	Princeton, NJ, United StatesHQ checked Sep 17, 2026	10001+	5,220 contacts →
	Indirect evidence “As the drug development business of Laboratory Corporation of America Holdings (Labcorp) and the world’s most comprehensive drug development #CRO service company, we have helped…” Source: RevenueBase Database · checked Sep 17, 2026
5	PRA Health Sciences	Indirect evidence	Raleigh, NC, United StatesHQ checked Sep 17, 2026	10001+	4,708 contacts →
	Indirect evidence “PRA is now an ICON plc company.” Source: RevenueBase Database · checked Sep 17, 2026
6	Worldwide Clinical Trials	Strong evidence	Research Triangle Park, NC, United StatesHQ checked Sep 17, 2026	1,001-5,000	3,440 contacts →
	Strong evidence “Worldwide Clinical Trials (Worldwide) is a global CRO serving development-driven biopharmaceutical companies, with more than 4,400 professionals operating across more than 70…” Source: RevenueBase Database · checked Sep 17, 2026
7	Premier Research	Partial evidence	Morrisville, NC, United StatesHQ checked Sep 17, 2026	1,001-5,000	2,584 contacts →
	Partial evidence “Premier Research International LLC (Premier) is a global leader in clinical research and consulting services with expertise in driving an efficient and effective path to market…” Source: RevenueBase Database · checked Sep 17, 2026
8	PSI CRO	Indirect evidence	Zug, SwitzerlandHQ checked Sep 17, 2026	1,001-5,000	2,494 contacts →
	Indirect evidence “PSI is a leading full-service global Contract Research Organization whose key strength is predictable patient enrollment across multiple therapeutic areas.” Source: RevenueBase Database · checked Sep 17, 2026
9	Precision For Medicine	Partial evidence	Bethesda, MD, United StatesHQ checked Sep 17, 2026	1,001-5,000	1,781 contacts →
	Partial evidence “Precision for Medicine is an industry-leading global clinical research services organization, purpose-built to improve the clinical research and development process for new…” Source: RevenueBase Database · checked Sep 17, 2026
10	Altasciences	Partial evidence	Laval, QC, CanadaHQ checked Sep 17, 2026	1,001-5,000	1,759 contacts →
	Partial evidence “Outsourcing made easy with a one-stop solution to early-phase drug development.” Source: RevenueBase Database · checked Sep 17, 2026
11	Cliantha Research Limited	Strong evidence	Ahmedabad, IndiaHQ checked Sep 17, 2026	1,001-5,000	1,612 contacts →
	Strong evidence “Cliantha Research, full-service clinical research organization (CRO), provides comprehensive and integrated offerings in Early Phase (BA/BE and Phase I) trials, Late Phase (Phase…” Source: RevenueBase Database · checked Sep 17, 2026
12	Veeda Lifesciences	Strong evidence	Ahmedabad, IndiaHQ checked Sep 17, 2026	501-1,000	1,320 contacts →
	Strong evidence “We partner with innovator and generic companies using our high-quality infrastructure and a global network of clinical trial sites, to launch novel therapies and new products for…” Source: RevenueBase Database · checked Sep 17, 2026
13	Suvoda	Strong evidence	Conshohocken, PA, United StatesHQ checked Sep 17, 2026	1,001-5,000	1,255 contacts →
	Strong evidence “Suvoda is a global clinical trial technology company, now strengthened by our merger with Greenphire.” Source: RevenueBase Database · checked Sep 17, 2026
14	Vimta Labs LTD	Indirect evidence	Hyderabad, IndiaHQ checked Sep 17, 2026	1,001-5,000	1,239 contacts →
	Indirect evidence “Founded in 1984 with headquarters in Hyderabad, India, VIMTA LABS LTD.” Source: RevenueBase Database · checked Sep 17, 2026
15	Lambda Therapeutic Research	Partial evidence	Ahmedabad, IndiaHQ checked Sep 17, 2026	1,001-5,000	1,235 contacts →
	Partial evidence “Lambda Therapeutic Research is a leading full-service Global Clinical Research Organization (CRO) headquartered in Ahmedabad (India), with facilities and operations in Mehsana…” Source: RevenueBase Database · checked Sep 17, 2026
16	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
17	Celerion	Partial evidence	Lincoln, NE, United StatesHQ checked Sep 17, 2026	1,001-5,000	1,080 contacts →
	Partial evidence “Celerion, a leader in early clinical research, delivers Applied Translational Medicine.” Source: RevenueBase Database · checked Sep 17, 2026
18	CTI Clinical Trial And Consulting Services	Strong evidence	Covington, KY, United StatesHQ checked Sep 17, 2026	1,001-5,000	1,043 contacts →
	Strong evidence “CTI Clinical Trial and Consulting Services is a global, privately held, research service organization, delivering a complete spectrum of clinical trial and consulting services…” Source: RevenueBase Database · checked Sep 17, 2026
19	Navitas Life Sciences	Partial evidence	Gaithersburg, MD, United StatesHQ checked Sep 17, 2026	1,001-5,000	990 contacts →
	Partial evidence “Navitas Life Sciences is a global Clinical Research partner with over 35 years of expertise in Clinical, Regulatory, Safety, and Data Management solutions.” Source: RevenueBase Database · checked Sep 17, 2026
20	Allucent	Indirect evidence	Cary, NC, United StatesHQ checked Sep 17, 2026	1,001-5,000	977 contacts →
	Indirect evidence “Allucent is on a mission to help bring new therapies to light by solving the distinct challenges of small and mid-sized biotech companies.” Source: RevenueBase Database · checked Sep 17, 2026
21	Velocity Clinical Research, INC	Strong evidence	Durham, NC, United StatesHQ checked Sep 17, 2026	1,001-5,000	971 contacts →
	Strong evidence “Velocity is the world’s leading organization of fully integrated clinical research sites.” Source: RevenueBase Database · checked Sep 17, 2026
22	EMMES	Strong evidence	Rockville, MD, United StatesHQ checked Sep 17, 2026	1,001-5,000	961 contacts →
	Strong evidence “Emmes is a Contract Research Organization delivering complex clinical trials through therapeutic expertise, scientific rigor, and technology-enabled execution.” Source: RevenueBase Database · checked Sep 17, 2026
23	Bioagilytix	Partial evidence	Durham, NC, United StatesHQ checked Sep 17, 2026	1,001-5,000	915 contacts →
	Partial evidence “BioAgilytix is a leading global contract research organization focused on supporting pharmaceutical and biotech partners in all phases of drug development.” Source: RevenueBase Database · checked Sep 17, 2026
24	Aizant Drug Research Solutions PVT LTD	Indirect evidence	Hyderabad, IndiaHQ checked Sep 17, 2026	501-1,000	886 contacts →
	Indirect evidence “Aizant® is an integrated drug development solutions provider.” Source: RevenueBase Database · checked Sep 17, 2026
25	MMS	Partial evidence	Canton, MI, United StatesHQ checked Sep 17, 2026	501-1,000	876 contacts →
	Partial evidence “MMS Holdings (MMS) is an award-winning, data-focused clinical research organization (CRO) that supports the pharmaceutical and biotech industries with a proven, scientific…” 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 sites. 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 sites.
Partial evidence: Its own public description names part of phase 1 clinical trial sites, 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 sites. 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 2,160 phase 1 clinical trial sites worldwide

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Phase 1 clinical trial sites worldwide at a glance

As of Sep 17, 2026

42.5%Verified-email coverage

63.9Average contacts per company

11-50Median size (employees)

2.6%Largest-city concentration · Miami

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

755

11-50

818

51-200

371

201-500

117

501-1,000

1,001-5,000

5,001-10,000

10001+

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 sites, 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.
Coverage: 13 countries, largest first: the United States, India, the United Kingdom, Germany, Canada, Australia, Poland, France, Türkiye, the Netherlands and 3 more. Country and city lists for phase 1 clinical trial sites are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “phase 1 clinical trial sites”. 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 sites), 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 sites, and records with no verified work email.
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, 58,626 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.

Phase 1 clinical trial sites by location

18 lists · largest first

Every Phase 1 clinical trial sites list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

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 sites, 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 sites are there worldwide?

RevenueBase identified 2,160 phase 1 clinical trial sites worldwide 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?

PPD, headquartered in Waltham, tops this list with the largest team on record.

Which country has the most phase 1 clinical trial sites?

The United States leads with 1,253 companies, followed by India (268) and the United Kingdom (135). Every phase 1 clinical trial sites list by country and city is linked on this page.

Which city has the most phase 1 clinical trial sites?

Miami leads with 57 headquartered companies, followed by Hyderabad (39) and London (37).

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 58,626 verified decision-maker contacts tracked across these 2,160 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.