Company lists · Data refreshed September 2026

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

Name: Phase 1 clinical trial companies based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 647 companies tracked

RevenueBase identified 647 phase 1 clinical trial companies headquartered in the United States as of September 2026 and tracks 48,944 professional contacts across them, including 22,465 with verified work emails. Miami is the largest hub.

This list covers phase 1 clinical trial companies headquartered in the United States, 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.

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

647Companies

48,944Contacts tracked

22,465Verified emails

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The 25 largest phase 1 clinical trial companies based in the United States

Ranked by team size

Top 25 of 647 phase 1 clinical trial companies based in the United States, 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 companies: 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	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
3	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
4	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
5	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
6	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
7	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
8	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
9	DM Clinical Research	Strong evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	501-1,000	590 contacts →
	Strong evidence “DM Clinical Research is a network of clinical trial investigator sites with headquarters based out of Houston, Texas.” Source: RevenueBase Database · checked Sep 17, 2026
10	Pharm-Olam, LLC	Indirect evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	501-1,000	561 contacts →
	Indirect evidence “Pharm-Olam is now Allucent.” Source: RevenueBase Database · checked Sep 17, 2026
11	Chiltern	Indirect evidence	Durham, NC, United StatesHQ checked Sep 17, 2026	10001+	532 contacts →
	Indirect evidence “THIS PAGE IS NOT MONITORED.” Source: RevenueBase Database · checked Sep 17, 2026
12	Novum Pharmaceutical Research Services	Indirect evidence	Las Vegas, NV, United StatesHQ checked Sep 17, 2026	51-200	238 contacts →
	Indirect evidence “Novum is a Contract Research Organization (CRO) that provides research services to the worldwide pharmaceutical industry.” Source: RevenueBase Database · checked Sep 17, 2026
13	Klinera Global Services	Strong evidence	San Jose, CA, United StatesHQ checked Sep 17, 2026	201-500	229 contacts →
	Strong evidence “Since 2005, KlinEra has partnered with some of the largest pharmaceutical, biotech and device companies, providing innovative and customized clinical trial and research services.” Source: RevenueBase Database · checked Sep 17, 2026
14	K2 Medical Research	Partial evidence	Maitland, FL, United StatesHQ checked Sep 17, 2026	201-500	226 contacts →
	Partial evidence “Welcome to K2 Medical Research, a privately-owned clinical research facility with multiple locations in Florida, Tennessee, and Rhode Island.” Source: RevenueBase Database · checked Sep 17, 2026
15	Biorasi	Partial evidence	Aventura, FL, United StatesHQ checked Sep 17, 2026	201-500	225 contacts →
	Partial evidence “Biorasi is a global clinical research organization (CRO) that delivers speed-to-market strategies for small to midsized biotech and biopharma sponsors.” Source: RevenueBase Database · checked Sep 17, 2026
16	The Start Center For Cancer Research	Strong evidence	San Antonio, TX, United StatesHQ checked Sep 17, 2026	501-1,000	208 contacts →
	Strong evidence “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…” Source: RevenueBase Database · checked Sep 17, 2026
17	Lindus Health	Strong evidence	New York, United StatesHQ checked Sep 17, 2026	51-200	205 contacts →
	Strong evidence “Our mission at Lindus Health is to accelerate clinical trials, so patients can benefit from new treatments sooner.” Source: RevenueBase Database · checked Sep 17, 2026
18	KPS Life	Indirect evidence	Malvern, PA, United StatesHQ checked Sep 17, 2026	201-500	199 contacts →
	Indirect evidence “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…” Source: RevenueBase Database · checked Sep 17, 2026
19	Cbcc Global Research	Strong evidence	Bakersfield, CA, United StatesHQ checked Sep 17, 2026	51-200	192 contacts →
	Strong evidence “CBCC Global Research is a full service clinical contract research organization serving a wide spectrum of clinical research services including Phase II-IV clinical trials…” Source: RevenueBase Database · checked Sep 17, 2026
20	Dr. Vince Clinical Research	Indirect evidence	Overland Park, KS, United StatesHQ checked Sep 17, 2026	201-500	168 contacts →
	Indirect evidence “Dr.” Source: RevenueBase Database · checked Sep 17, 2026
21	IDDI	Partial evidence	Raleigh, NC, United StatesHQ checked Sep 17, 2026	51-200	167 contacts →
	Partial evidence “IDDI is a trusted clinical data science partner.” Source: RevenueBase Database · checked Sep 17, 2026
22	Tekton Research	Strong evidence	Austin, TX, United StatesHQ checked Sep 17, 2026	51-200	166 contacts →
	Strong evidence “Founded in 2006, Tekton Research is a multi-specialty clinical research site organization conducting Phase 1-4 clinical trials across neurology and psychiatry, cardiometabolic…” Source: RevenueBase Database · checked Sep 17, 2026
23	M3 Wake Research	Strong evidence	Raleigh, NC, United StatesHQ checked Sep 17, 2026	201-500	161 contacts →
	Strong evidence “M3 Wake Research is a premier clinical trial network that has been conducting studies since 1984.” Source: RevenueBase Database · checked Sep 17, 2026
24	Next Oncology, An Avacare Business	Indirect evidence	San Antonio, TX, United StatesHQ checked Sep 17, 2026	201-500	157 contacts →
	Indirect evidence “NEXT Oncology, an Avacare business founded by Anthony W.” Source: RevenueBase Database · checked Sep 17, 2026
25	Spaulding Clinical Research, LLC	Strong evidence	West Bend, WI, United StatesHQ checked Sep 17, 2026	51-200	154 contacts →
	Strong evidence “Founded in 2007, Spaulding Clinical is a full-service, state-of-the-art paperless Phase I clinical pharmacology unit.” 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 companies. 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 companies.
Partial evidence: Its own public description names part of phase 1 clinical trial companies, 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 companies. 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 647 phase 1 clinical trial companies based in the United States

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

As of Sep 17, 2026

45.9%Verified-email coverage

75.6Average contacts per company

11-50Median size (employees)

5.3%Largest-city concentration · Miami

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

246

11-50

260

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

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 647 companies.

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 companies, 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.
What qualifies: Companies headquartered in the United States whose own description of what they do matches “phase 1 clinical trial companies”. 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 companies), 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 companies, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and 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, 22,465 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 companies by metro

Phase 1 clinical trial companies in Miami34

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 companies, 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 companies are there based in the United States?

RevenueBase identified 647 phase 1 clinical trial companies headquartered in the United States 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 city has the most phase 1 clinical trial companies?

Miami leads with 34 headquartered companies, followed by San Diego (17) and Houston (14).

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 22,465 verified decision-maker contacts tracked across these 647 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.