Company lists · Data refreshed September 2026

Top 25 Phase 1 clinical trial sites based in the United States

RevenueBase identified 1,253 company matches for phase 1 clinical trial sites associated with the United States as of September 2026 and tracks 96,289 professional contacts across them, including 43,526 with verified work emails. Miami is the largest hub.

This list covers company matches for phase 1 clinical trial sites associated with the United States, 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 17, 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.

How to read this list RevenueBase SmartSearch · Exact Recorded Sep 17, 2026 How this list was built
1,253Companies
96,289Contacts tracked
43,526Verified emails
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The 25 largest phase 1 clinical trial sites based in the United States

Ranked by team size
Top 25 of 1,253 company matches for phase 1 clinical trial sites based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 17, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchWaltham, MA, United StatesHQ recorded Sep 17, 202610001+20,530 contacts →

Exact match

“The PPD™ clinical research business of Thermo Fisher Scientific, the world leader in serving science, enables customers to accelerate innovation and drug development through…”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
2Exact matchResearch Triangle Park, NC, United StatesHQ recorded Sep 17, 202610001+10,632 contacts →

Exact match

“Fortrea (Nasdaq: FTRE) is a leading global clinical research organization (CRO) dedicated to providing innovative clinical development solutions to the life sciences industry.”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
3Exact matchCincinnati, OH, United StatesHQ recorded Sep 17, 20265,001-10,0005,960 contacts →

Exact match

“Medpace is a scientifically-driven, global, full-service clinical contract research organization (CRO) providing Phase I-IV clinical development services to the biotechnology…”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
4Exact matchPrinceton, NJ, United StatesHQ recorded Sep 17, 202610001+5,220 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
5Exact matchRaleigh, NC, United StatesHQ recorded Sep 17, 202610001+4,708 contacts →

Exact match

“PRA is now an ICON plc company.”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
6Exact matchResearch Triangle Park, NC, United StatesHQ recorded Sep 17, 20261,001-5,0003,440 contacts →

Exact match

“Worldwide Clinical Trials (Worldwide) is a global CRO serving development-driven biopharmaceutical companies, with more than 4,400 professionals operating across more than 70…”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
7Exact matchMorrisville, NC, United StatesHQ recorded Sep 17, 20261,001-5,0002,584 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
8Exact matchBethesda, MD, United StatesHQ recorded Sep 17, 20261,001-5,0001,781 contacts →

Exact match

“Precision for Medicine is an industry-leading global clinical research services organization, purpose-built to improve the clinical research and development process for new…”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
9Exact matchConshohocken, PA, United StatesHQ recorded Sep 17, 20261,001-5,0001,255 contacts →

Exact match

“Suvoda is a global clinical trial technology company, now strengthened by our merger with Greenphire.”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
10Exact matchLincoln, NE, United StatesHQ recorded Sep 17, 20261,001-5,0001,080 contacts →

Exact match

“Celerion, a leader in early clinical research, delivers Applied Translational Medicine.”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
11Exact matchCovington, KY, United StatesHQ recorded Sep 17, 20261,001-5,0001,043 contacts →

Exact match

“CTI Clinical Trial and Consulting Services is a global, privately held, research service organization, delivering a complete spectrum of clinical trial and consulting services…”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
12Exact matchGaithersburg, MD, United StatesHQ recorded Sep 17, 20261,001-5,000990 contacts →

Exact match

“Navitas Life Sciences is a global Clinical Research partner with over 35 years of expertise in Clinical, Regulatory, Safety, and Data Management solutions.”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
13Exact matchCary, NC, United StatesHQ recorded Sep 17, 20261,001-5,000977 contacts →

Exact match

“Allucent is on a mission to help bring new therapies to light by solving the distinct challenges of small and mid-sized biotech companies.”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
14Exact matchDurham, NC, United StatesHQ recorded Sep 17, 20261,001-5,000971 contacts →

Exact match

“Velocity is the world’s leading organization of fully integrated clinical research sites.”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
15Exact matchRockville, MD, United StatesHQ recorded Sep 17, 20261,001-5,000961 contacts →

Exact match

“Emmes is a Contract Research Organization delivering complex clinical trials through therapeutic expertise, scientific rigor, and technology-enabled execution.”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
16Exact matchDurham, NC, United StatesHQ recorded Sep 17, 20261,001-5,000915 contacts →

Exact match

“BioAgilytix is a leading global contract research organization focused on supporting pharmaceutical and biotech partners in all phases of drug development.”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
17Exact matchCanton, MI, United StatesHQ recorded Sep 17, 2026501-1,000876 contacts →

Exact match

“MMS Holdings (MMS) is an award-winning, data-focused clinical research organization (CRO) that supports the pharmaceutical and biotech industries with a proven, scientific…”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
18Exact matchSalt Lake City, UT, United StatesHQ recorded Sep 17, 20261,001-5,000847 contacts →

Exact match

“CenExel is a leading integrated, wholly owned, nationwide clinical research site network comprised of 18 Centers of Excellence in major metropolitan areas across the U.”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
19Exact matchRaleigh, NC, United StatesHQ recorded Sep 17, 20261,001-5,000758 contacts →

Exact match

“Caidya is a multi-therapeutic clinical research organization (CRO) serving innovators worldwide.”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
20Exact matchDurham, NC, United StatesHQ recorded Sep 17, 2026501-1,000732 contacts →

Exact match

“Experience the Cohesion Effect.”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
21Exact matchExton, PA, United StatesHQ recorded Sep 17, 20261,001-5,000727 contacts →

Exact match

“Frontage Laboratories is a US-based Contract Research Organization (CRO) that was initially established in New Jersey in April 2001 and later relocated to Pennsylvania in 2004.”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
22Exact matchWaltham, MA, United StatesHQ recorded Sep 17, 202610001+611 contacts →

Exact match

“Thermo Fisher Scientific provides industry-leading pharma services solutions for drug development, clinical trial logistics, and commercial manufacturing to customers through our…”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
23Exact matchHouston, TX, United StatesHQ recorded Sep 17, 2026501-1,000590 contacts →

Exact match

“DM Clinical Research is a network of clinical trial investigator sites with headquarters based out of Houston, Texas.”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
24Exact matchHorsham, PA, United StatesHQ recorded Sep 17, 20261,001-5,000561 contacts →

Exact match

“Accelerated Enrollment Solutions (AES) is now Trialmed.”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
25Exact matchWilmington, NC, United StatesHQ recorded Sep 17, 20261,001-5,000513 contacts →

Exact match

“Catalyst Clinical Research is now Worldwide Clinical Trials.”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase

Showing 25 of 1,253 phase 1 clinical trial sites based in the United States

See the full list, filter by size, metro and specialty, and access 43,526 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Phase 1 clinical trial sites based in the United States at a glance

As of Sep 17, 2026
45.2%Verified-email coverage
76.8Average contacts per company
11-50Median size (employees)
4.5%Largest-city concentration · Miami
Sep 17, 2026Page data refreshed

Companies by employee count

1-10
452
11-50
487
51-200
192
201-500
58
501-1,000
22
1,001-5,000
30
5,001-10,000
2
10001+
8

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 1,253 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 States whose business descriptions match “phase 1 clinical trial sites” 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 43,526 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 17, 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 “phase 1 clinical trial sites”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many phase 1 clinical trial sites are there based in the United States?

RevenueBase identified 1,253 company matches for phase 1 clinical trial sites associated with the United States 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?

PPD tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most phase 1 clinical trial sites?

Miami leads with 57 company records, followed by Houston (35) and New York (27).

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 43,526 professional contacts with verified work emails tracked across these 1,253 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 17, 2026.

Ready to reach these companies? Verified emails and direct dials for all 1,253 phase 1 clinical trial sites based in the United States. Start with a free account, no credit card.

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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.