Company lists · Data refreshed October 2026

Top 25 Clinical investigator networks based in the United States

RevenueBase identified 672 company matches for clinical investigator networks associated with the United States as of October 2026 and tracks 52,379 professional contacts across them, including 21,231 with verified work emails. Miami is the largest hub.

This list covers company matches for clinical investigator networks 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 October 9, 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 Oct 9, 2026 How this list was built
672Companies
52,379Contacts tracked
21,231Verified emails
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The 25 largest clinical investigator networks based in the United States

Ranked by team size
Top 25 of 672 company matches for clinical investigator networks based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 9, 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 matchWilmington, NC, United StatesHQ recorded Oct 9, 202610001+19,757 contacts →

Exact match

“PPD is part of Thermo Fisher Scientific, the world leader in serving science.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
2Exact matchCincinnati, OH, United StatesHQ recorded Oct 9, 20265,001-10,0006,234 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 · Oct 9, 2026 · View company records in RevenueBase
3Exact matchRaleigh, NC, United StatesHQ recorded Oct 9, 202610001+4,768 contacts →

Exact match

“PRA is now an ICON plc company.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
4Exact matchGaithersburg, MD, United StatesHQ recorded Oct 9, 20261,001-5,0001,001 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 · Oct 9, 2026 · View company records in RevenueBase
5Exact matchDurham, NC, United StatesHQ recorded Oct 9, 20261,001-5,000991 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
6Exact matchNashville, TN, United StatesHQ recorded Oct 9, 2026501-1,000928 contacts →

Exact match

“Sarah Cannon Research Institute (SCRI) is one of the world’s leading oncology research organizations, conducting community-based clinical trials.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
7Exact matchCanton, MI, United StatesHQ recorded Oct 9, 2026501-1,000913 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 · Oct 9, 2026 · View company records in RevenueBase
8Exact matchSalt Lake City, UT, United StatesHQ recorded Oct 9, 20261,001-5,000884 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 · Oct 9, 2026 · View company records in RevenueBase
9Exact matchDurham, NC, United StatesHQ recorded Oct 9, 2026501-1,000747 contacts →

Exact match

“Experience the Cohesion Effect.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
10Exact matchRaleigh, NC, United StatesHQ recorded Oct 9, 20261,001-5,000734 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
11Exact matchHouston, TX, United StatesHQ recorded Oct 9, 2026501-1,000578 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 · Oct 9, 2026 · View company records in RevenueBase
12Exact matchDurham, NC, United StatesHQ recorded Oct 9, 202610001+528 contacts →

Exact match

“THIS PAGE IS NOT MONITORED.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
13Exact matchCoral Gables, FL, United StatesHQ recorded Oct 9, 2026501-1,000383 contacts →

Exact match

“Sitero is a next-generation, site-focused clinical research organization (CRO) for life sciences and institutional research organizations that helps get treatments to market safer…”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
14Exact matchApex, NC, United StatesHQ recorded Oct 9, 2026501-1,000342 contacts →

Exact match

“Flourish Research is a fully integrated, multi-site clinical trial network serving sponsors and CROs across North America.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
15Exact matchSan Antonio, TX, United StatesHQ recorded Oct 9, 2026501-1,000295 contacts →

Exact match

“Deeply rooted in community oncology centers globally, the START Center for Cancer Research ("START") provides patients with access to specialized Phase 1 clinical trials for novel…”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
16Exact matchMorrisville, NC, United StatesHQ recorded Oct 9, 2026201-500288 contacts →

Exact match

“Science 37 is a modern clinical research site that delivers trials directly to patients’ homes.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
17Exact matchAustin, TX, United StatesHQ recorded Oct 9, 2026201-500238 contacts →

Exact match

“Elligo Health Research is an integrated research organization founded to bridge the gap between cutting-edge clinical trials and the patients who need them-an idea that sparked…”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
18Exact matchDenver, CO, United StatesHQ recorded Oct 9, 20261,001-5,000233 contacts →

Exact match

“EmVenio Clinical Research, a Professional Case Management subsidiary, operates from U.S.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
19Exact matchMalvern, PA, United StatesHQ recorded Oct 9, 2026201-500229 contacts →

Exact match

“Our mission: To accelerate the availability of new, life-changing therapies for patients by partnering with global pharmaceutical companies to improve the quality and execution of…”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
20Exact matchWatertown, MA, United StatesHQ recorded Oct 9, 2026201-500217 contacts →

Exact match

“Adams Clinical is a network of 6 clinical research sites throughout the US that studies how well medicines treat Psychiatric and Neurological conditions.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
21Exact matchLake Worth, AZ, United StatesHQ recorded Oct 9, 2026501-1,000191 contacts →

Exact match

“Headlands Research is a leading globally integrated site organization with a mission to improve patients’ lives by advancing innovative medical therapies.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
22Exact matchWinston-salem, NC, United StatesHQ recorded Oct 9, 202651-200186 contacts →

Exact match

“As a leading Integrated Research Organization (IRO), we partner with major healthcare systems to embed clinical trials at the point of care, connecting patients to research…”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
23Exact matchAmherst, NY, United StatesHQ recorded Oct 9, 202651-200181 contacts →

Exact match

“Frontier Science is an independent not-for-profit organization with proven expertise in the design, conduct, analysis, and reporting of clinical trials and observational studies.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
24Exact matchRaleigh, NC, United StatesHQ recorded Oct 9, 2026201-500171 contacts →

Exact match

“M3 Wake Research is a premier clinical trial network that has been conducting studies since 1984.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
25Exact matchAustin, TX, United StatesHQ recorded Oct 9, 202651-200167 contacts →

Exact match

“Founded in 2006, Tekton Research is a multi-specialty clinical research site organization conducting Phase 1-4 clinical trials across neurology and psychiatry, cardiometabolic…”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase

Showing 25 of 672 clinical investigator networks based in the United States

See the full list, filter by size, metro and specialty, and access 21,231 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Clinical investigator networks based in the United States at a glance

As of Oct 9, 2026
40.5%Verified-email coverage
77.9Average contacts per company
11-50Median size (employees)
5.1%Largest-city concentration · Miami
Oct 9, 2026Page data refreshed

Companies by employee count

1-10
258
11-50
271
51-200
90
201-500
21
501-1,000
13
1,001-5,000
10
5,001-10,000
2
10001+
5

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 672 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 “clinical investigator networks” 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 21,231 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 October 9, 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 investigator networks”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many clinical investigator networks are there based in the United States?

RevenueBase identified 672 company matches for clinical investigator networks associated with the United States as of October 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 clinical investigator networks?

Miami leads with 34 company records, followed by Houston (25) and Atlanta (12).

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 21,231 professional contacts with verified work emails tracked across these 672 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 October 9, 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.