Company lists · Data refreshed October 2026

Top 19 Clinical trial services organizations based in Chicago, United States

Name: Clinical trial services organizations based in Chicago, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Oct 9, 2026 44 companies tracked

RevenueBase identified 44 company matches for clinical trial services organizations associated with Chicago, United States as of October 2026 and tracks 3,986 professional contacts across them, including 2,575 with verified work emails. Across the United States, Boston is the largest hub for this category (100 companies); Chicago has 44.

This list covers company matches for clinical trial services organizations associated with Chicago, 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

44Companies

3,986Contacts tracked

2,575Verified emails

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The 19 largest clinical trial services organizations based in Chicago, United States

Ranked by team size

Top 19 of 44 company matches for clinical trial services organizations based in Chicago, 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.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Eversana	Exact match	Chicago, IL, United StatesHQ recorded Oct 9, 2026	5,001-10,000	3,218 contacts →
	Exact match “EVERSANA® is a leading independent provider of global services to the life sciences industry.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
2	IIT Research Institute Iitri	Exact match	Chicago, IL, United StatesHQ recorded Oct 9, 2026	51-200	192 contacts →
	Exact match “IITRI was founded in 1936 as the research arm of the Illinois Institute of Technology (IIT).” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
3	Citrus Health Group	Exact match	Chicago, IL, United StatesHQ recorded Oct 9, 2026	51-200	169 contacts →
	Exact match “Citrus Health Group is a dynamic, boutique strategic consultancy that supports our clients along the science-to-value continuum to optimize effective commercial development of…” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
4	Eversana Consulting	Exact match	Chicago, IL, United StatesHQ recorded Oct 9, 2026	201-500	64 contacts →
	Exact match “EVERSANA CONSULTING delivers global consulting services to address challenges across the product lifecycle in the pharmaceutical and biotechnology industries.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
5	Great Lakes Clinical Trials, A Flourish Research Site	Exact match	Chicago, IL, United StatesHQ recorded Oct 9, 2026	51-200	28 contacts →
	Exact match “Great Lakes Clinical Trials is a network of 5 clinical trial centers located throughout the Chicago area, specializing in the testing of new medications, vaccines and treatments…” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
6	Sword BIO	Exact match	Chicago, IL, United StatesHQ recorded Oct 9, 2026	11-50	27 contacts →
	Exact match “Sword Bio is a bioanalytical CRO committed to delivering projects with the best-in-class quality, science, service, and speed.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
7	The Evanston Group NOW EG Life Sciences	Exact match	Chicago, IL, United StatesHQ recorded Oct 9, 2026	51-200	20 contacts →
	Exact match “The Evanston Group is now EG Life Sciences, a company of Eliassen Group.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
8	Uptown Research Institute	Exact match	Chicago, IL, United StatesHQ recorded Oct 9, 2026	11-50	19 contacts →
	Exact match “The Uptown Research Institute is Chicagoland's premier private clinical trials site.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
9	Cedar Crosse Research Center	Exact match	Chicago, IL, United StatesHQ recorded Oct 9, 2026	11-50	18 contacts →
	Exact match “Cedar Crosse Research Center connects patients with personalized health supervision through comprehensive clinical research studies.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
10	Closerlook	Exact match	Chicago, IL, United StatesHQ recorded Oct 9, 2026	51-200	17 contacts →
	Exact match “closerlook is now Avalere Health.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
11	M1 Health	Exact match	Chicago, IL, United StatesHQ recorded Oct 9, 2026	11-50	12 contacts →
	Exact match “M1 Health is an Integrated Research Organization IRO focused on delivering excellence in clinical trials and building trust in local communities through its growing number of…” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
12	Investigator Support Services, INC	Exact match	Chicago, IL, United StatesHQ recorded Oct 9, 2026	11-50	8 contacts →
	Exact match “Investigator Support Services streamlines site selection and optimizes consumer and provider communications.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
13	Denova Research	Exact match	Chicago, IL, United StatesHQ recorded Oct 9, 2026	1-10	6 contacts →
	Exact match “DeNova Research is a clinical research center specializing in the fields of aesthetic medicine, plastic surgery and dermatology.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
14	Third Opinion	Exact match	Chicago, IL, United StatesHQ recorded Oct 9, 2026	1-10	4 contacts →
	Exact match “Third Opinion helps research-focused practices enroll more patients, onboard more studies, and fulfill industry data requests while giving patients the opportunity to participate…” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
15	Chicago Research Center, INC	Exact match	Chicago, IL, United StatesHQ recorded Oct 9, 2026	11-50	3 contacts →
	Exact match “Since 2005, the Chicago Research Center’s dedicated team of qualified, board certified physicians, licensed clinicians, psychometricians and trained support staff have taken part…” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
16	Uptrials	Exact match	Chicago, IL, United StatesHQ recorded Oct 9, 2026	1-10	3 contacts →
	Exact match “UpTrials accelerates study start-up and site activation for clinical trials with our AI Trial Assistant, that operationalizes protocols to automate clinical operations workflows…” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
17	Supernova Clinical Research, INC	Exact match	Chicago, United StatesHQ recorded Oct 9, 2026	1-10	2 contacts →
	Exact match “Welcome to SuperNOVA Clinical Research, a game-changer in the world of biotech innovation.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
18	Marcela Science LLC	Exact match	Chicago, United StatesHQ recorded Oct 9, 2026	1-10	1 contacts →
	Exact match “We specialize in providing expert clinical trial management services to pharmaceutical and life science companies.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
19	Effector Life Science	Exact match	Chicago, IL, United StatesHQ recorded Oct 9, 2026	1-10	1 contacts →
	Exact match “Effector Life Science is a Chicago-based consulting and services firm that is focused on biopharmaceutical industry.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “clinical trial services organizations”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 19 of 44 clinical trial services organizations based in Chicago, United States

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Clinical trial services organizations based in Chicago, United States at a glance

As of Oct 9, 2026

64.6%Verified-email coverage

90.6Average contacts per company

11-50Median size (employees)

Oct 9, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

5,001-10,000

Email recency for this list is measured across the whole United States list rather than for Chicago, so it is reported there. Company counts and contact totals on this page are exact for Chicago, over 44 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 Chicago, United States whose business descriptions match “clinical trial services organizations” 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 2,575 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.

Clinical trial services organizations by metro in the United States

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 trial services organizations”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many clinical trial services organizations are there based in Chicago, United States?

RevenueBase identified 44 company matches for clinical trial services organizations associated with Chicago, 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?

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

Which city in the United States has the most clinical trial services organizations?

Boston leads the United States with 100 company records, followed by New York (98) and Miami (85). Chicago has 44.

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 2,575 professional contacts with verified work emails tracked across these 44 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.