Company lists · Data refreshed September 2026

Top 25 Pharmaceutical research outsourcing based in the United States

Name: Pharmaceutical research outsourcing based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 5, 2026 2,181 companies tracked

RevenueBase identified 2,181 pharmaceutical research outsourcing headquartered in the United States as of September 2026 and tracks 213,551 professional contacts across them, including 88,242 with verified work emails and 59,085 with mobile numbers. San Diego is the largest hub.

This list covers pharmaceutical research outsourcing 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 5, 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 5, 2026 86% judged on-target in blind review

2,181Companies

213,551Contacts tracked

88,242Verified emails

59,085Mobile numbers

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The 25 largest pharmaceutical research outsourcing based in the United States

Ranked by team size

Top 25 of 2,181 pharmaceutical research outsourcing based in the United States, ranked by team size, largest first. Data refreshed Sep 5, 2026. RevenueBase Smart Search rates how each company's information relates to pharmaceutical research outsourcing: 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	Labcorp	Indirect evidence	Burlington, NC, United StatesHQ checked Sep 5, 2026	10001+	38,427 contacts →
	Indirect evidence “Clear and confident health care decisions begin with questions.” Source: RevenueBase Database · checked Sep 5, 2026
2	PPD	Partial evidence	Waltham, MA, United StatesHQ checked Sep 5, 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 5, 2026
3	Parexel	Partial evidence	Raleigh, NC, United StatesHQ checked Sep 5, 2026	10001+	19,257 contacts →
	Partial evidence “Parexel is a leading global clinical research organization (CRO) providing insights-driven Clinical and Consulting solutions to the world’s life sciences industry.” Source: RevenueBase Database · checked Sep 5, 2026
4	Fortrea	Partial evidence	Research Triangle Park, NC, United StatesHQ checked Sep 5, 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 5, 2026
5	Medpace	Partial evidence	Cincinnati, OH, United StatesHQ checked Sep 5, 2026	5,001-10,000	5,960 contacts →
	Partial 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 5, 2026
6	PRA Health Sciences	Indirect evidence	Raleigh, NC, United StatesHQ checked Sep 5, 2026	10001+	4,708 contacts →
	Indirect evidence “PRA is now an ICON plc company.” Source: RevenueBase Database · checked Sep 5, 2026
7	Worldwide Clinical Trials	Indirect evidence	Research Triangle Park, NC, United StatesHQ checked Sep 5, 2026	1,001-5,000	3,440 contacts →
	Indirect 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 5, 2026
8	Eversana	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 5, 2026	5,001-10,000	3,149 contacts →
	Indirect evidence “EVERSANA® is a leading independent provider of global services to the life sciences industry.” Source: RevenueBase Database · checked Sep 5, 2026
9	Premier Research	Partial evidence	Morrisville, NC, United StatesHQ checked Sep 5, 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 5, 2026
10	Signant Health	Partial evidence	Blue Bell, PA, United StatesHQ checked Sep 5, 2026	1,001-5,000	2,083 contacts →
	Partial evidence “For 25+ years, Signant Health has been pioneering solutions and methodologies that propel clinical research programs toward regulatory success.” Source: RevenueBase Database · checked Sep 5, 2026
11	Propharma	Partial evidence	Raleigh, NC, United StatesHQ checked Sep 5, 2026	1,001-5,000	2,079 contacts →
	Partial evidence “At ProPharma, we help pharmaceutical, biotechnology, and medical device companies bring life-changing therapies to market.” Source: RevenueBase Database · checked Sep 5, 2026
12	Patheon	Indirect evidence	Waltham, MA, United StatesHQ checked Sep 5, 2026	10001+	2,004 contacts →
	Indirect evidence “Thermo Fisher Scientific provides industry-leading pharma services for drug development, clinical trial logistics, and commercial manufacturing through our Patheon™ brand.” Source: RevenueBase Database · checked Sep 5, 2026
13	Precision For Medicine	Partial evidence	Bethesda, MD, United StatesHQ checked Sep 5, 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 5, 2026
14	KBI Biopharma	Indirect evidence	Durham, NC, United StatesHQ checked Sep 5, 2026	1,001-5,000	1,645 contacts →
	Indirect evidence “KBI Biopharma is an award-winning biopharmaceutical contract services organization providing fully-integrated, accelerated drug development and biomanufacturing services to…” Source: RevenueBase Database · checked Sep 5, 2026
15	Eurofins Lancaster Laboratories	Partial evidence	Lancaster, PA, United StatesHQ checked Sep 5, 2026	1,001-5,000	1,638 contacts →
	Partial evidence “Eurofins Lancaster Laboratories is one of the largest commercial contract laboratories in the world providing comprehensive laboratory services in the pharmaceutical…” Source: RevenueBase Database · checked Sep 5, 2026
16	CYTEL	Indirect evidence	Cambridge, MA, United StatesHQ checked Sep 5, 2026	1,001-5,000	1,580 contacts →
	Indirect evidence “Cytel is the world’s leading data-science CRO, driving advancements in human health through robust analytics and innovative clinical trial software.” Source: RevenueBase Database · checked Sep 5, 2026
17	Clinchoice	Partial evidence	Horsham, PA, United StatesHQ checked Sep 5, 2026	1,001-5,000	1,516 contacts →
	Partial evidence “ClinChoice is a leading global full & functional service CRO, renowned for its exceptional product development and lifecycle management capabilities across the pharmaceutical…” Source: RevenueBase Database · checked Sep 5, 2026
18	NAMSA	Partial evidence	Toledo, OH, United StatesHQ checked Sep 5, 2026	1,001-5,000	1,275 contacts →
	Partial evidence “Helping medical device Sponsors improve healthcare since 1967, NAMSA is the world’s leading MedTech Contract Research Organization (CRO) offering global end-to-end development…” Source: RevenueBase Database · checked Sep 5, 2026
19	Norstella	Indirect evidence	One Penn Plaza, NY, United StatesHQ checked Sep 5, 2026	1,001-5,000	1,163 contacts →
	Indirect evidence “Norstella is the AI company for biopharma's highest-stakes decisions.” Source: RevenueBase Database · checked Sep 5, 2026
20	WCG	Partial evidence	Cary, NC, United StatesHQ checked Sep 5, 2026	1,001-5,000	1,103 contacts →
	Partial evidence “WCG is a true partner to research sponsors, CROs, sites and participants in navigating the clinical research journey.” Source: RevenueBase Database · checked Sep 5, 2026
21	Celerion	Partial evidence	Lincoln, NE, United StatesHQ checked Sep 5, 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 5, 2026
22	CTI Clinical Trial And Consulting Services	Partial evidence	Covington, KY, United StatesHQ checked Sep 5, 2026	1,001-5,000	1,043 contacts →
	Partial 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 5, 2026
23	Inotiv	Partial evidence	West Lafayette, IN, United StatesHQ checked Sep 5, 2026	1,001-5,000	1,015 contacts →
	Partial evidence “WHERE INSIGHTS LEAD TO ANSWERS Expect More In choosing a partner for discovery, development and research models, expect more: more attention, more insight, and a superlative…” Source: RevenueBase Database · checked Sep 5, 2026
24	Navitas Life Sciences	Partial evidence	Gaithersburg, MD, United StatesHQ checked Sep 5, 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 5, 2026
25	Allucent	Indirect evidence	Cary, NC, United StatesHQ checked Sep 5, 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 5, 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: pharmaceutical research outsourcing. 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 pharmaceutical research outsourcing.
Partial evidence: Its own public description names part of pharmaceutical research outsourcing, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name pharmaceutical research outsourcing. 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 2,181 pharmaceutical research outsourcing based in the United States

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Pharmaceutical research outsourcing based in the United States at a glance

As of Sep 5, 2026

41.3%Verified-email coverage

27.7%Mobile-number coverage

97.9Average contacts per company

11-50Median size (employees)

2.9%Largest-city concentration · San Diego

Sep 5, 2026Page data refreshed

Companies by employee count

1-10

963

11-50

702

51-200

303

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Freshness & accuracy

How recently the business emails on this list were verified

Email last verified

81,8330–30

5,45731–60

7861–90

3790–180

837180+

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 pharmaceutical research outsourcing, 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 “pharmaceutical research outsourcing”. 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 pharmaceutical research outsourcing), 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 pharmaceutical research outsourcing, 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, 88,242 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 5, 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.

Pharmaceutical research outsourcing by metro

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 pharmaceutical research outsourcing, 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 pharmaceutical research outsourcing are there based in the United States?

RevenueBase identified 2,181 pharmaceutical research outsourcing 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?

Labcorp, headquartered in Burlington, tops this list with the largest team on record.

Which city has the most pharmaceutical research outsourcing?

San Diego leads with 64 headquartered companies, followed by Boston (49) and New York (46).

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 88,242 verified decision-maker contacts tracked across these 2,181 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 5, 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.