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Trackers› Clinical trials› Illinois
Clinical trial register · United States · industry-sponsored

Clinical Trials in Illinois, 2026

Every industry-sponsored study on the ClinicalTrials.gov registry that lists a US site and is open, about to open, active-but-closed, or enrolling by invitation. This deliberately excludes academic and other non-industry sponsors — the full US registry across all sponsors runs to over 22,000 recruiting studies alone.

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Source: ClinicalTrials.gov. Complete coverage of the industry-sponsored slice — all 9125 matching records are in this view (non-industry sponsors are out of scope by design, not truncated). Synced 08 Oct 2026, 03:16 UTC
9125
Studies in scope
industry-sponsored, all four open statuses
4951
Recruiting now
open to new participants
2192
Lead sponsors
across recruiting studies
Top states
California 109 Florida 91 Colorado 71 Georgia 67 Illinois 56
Narrow the registerReset
Recruitment status
Phase
Lead sponsor
AstraZeneca110 AbbVie103 Eli Lilly and Company70 Novartis Pharmaceuticals62 Merck Sharp & Dohme LLC62 Clear sponsor filter
State
California109 Florida91 Colorado71 Georgia67 Illinois56
All 42 states
Target enrolment
to

Trials with a site in Illinois

56 of 9125 studies
Download
Status
Study
Lead sponsor
Phase
Enrol
US states
Start
Recruiting
Janssen Research & Development, LLC
Phase 3
348
California, Georgia, Illinois, New York, Washington
2026-07-23
Recruiting
Janssen Research & Development, LLC
Observational
150
Alabama, Arkansas, California, Colorado, Florida, Illinois, Indiana, Michigan
2026-06-12
Recruiting
Janssen Research & Development, LLC
Phase 3
600
Arkansas, California, Florida, Georgia, Illinois, Maryland, Massachusetts, Nevada
2026-04-30
Recruiting
Janssen Research & Development, LLC
Phase 3
600
California, Colorado, Florida, Georgia, Illinois, Louisiana, Michigan, New Jersey
2026-03-05
Recruiting
Janssen Research & Development, LLC
Phase 1
64
California, Georgia, Illinois, Michigan, New York, Texas
2026-03-02
Active, closed
Janssen Research & Development, LLC
Phase 2
168
Alabama, Arizona, California, Colorado, Florida, Georgia, Illinois, Iowa
2026-02-08
Recruiting
Janssen Research & Development, LLC
Phase 3
400
Arizona, Arkansas, California, Colorado, Connecticut, Florida, Georgia, Illinois
2026-02-04
Active, closed
Janssen Research & Development, LLC
Phase 2
189
California, Florida, Illinois, Indiana, Michigan, North Dakota, Oregon, Pennsylvania
2026-01-20
Recruiting
Janssen Research & Development, LLC
Phase 2
240
Arkansas, California, Florida, Georgia, Illinois, Indiana, New Mexico, North Carolina
2026-01-15
Recruiting
Janssen Research & Development, LLC
Phase 3
258
Alabama, District of Columbia, Georgia, Illinois, Maryland, Massachusetts, Minnesota, Ohio
2026-01-08
Recruiting
Janssen Research & Development, LLC
Phase 3
115
California, Colorado, Connecticut, Florida, Illinois, Indiana, Louisiana, Massachusetts
2026-01-05
Recruiting
Janssen Research & Development, LLC
Phase 3
800
Arizona, Arkansas, California, Colorado, Florida, Georgia, Illinois, Kansas
2025-12-19
Recruiting
Janssen Research & Development, LLC
Phase 3
500
Arizona, California, Connecticut, Florida, Georgia, Illinois, Kentucky, Maryland
2025-12-03
Recruiting
Janssen Research & Development, LLC
Phase 3
220
Arizona, California, Colorado, Florida, Georgia, Illinois, Indiana, Louisiana
2025-09-10
Recruiting
Janssen Research & Development, LLC
Phase 3
600
Alabama, Arizona, Arkansas, California, Colorado, Delaware, Florida, Illinois
2025-06-04
Active, closed
Janssen Research & Development, LLC
Phase 3
752
Alabama, California, Connecticut, Florida, Georgia, Illinois, Indiana, Iowa
2025-04-15
Active, closed
Janssen Research & Development, LLC
Phase 3
552
Arkansas, Florida, Illinois, North Carolina, Pennsylvania, Texas
2025-02-21
Recruiting
Janssen Research & Development, LLC
Phase 3
50
Alabama, California, Colorado, Illinois, Indiana, Iowa, New York, North Carolina
2025-02-10
Recruiting
Janssen Research & Development, LLC
Phase 3
750
Arizona, Arkansas, Florida, Illinois, Maryland, Massachusetts, Minnesota, New Mexico
2025-01-09
Recruiting
Janssen Research & Development, LLC
Phase 3
700
Arizona, Arkansas, California, Colorado, Connecticut, Florida, Georgia, Illinois
2024-12-12
Active, closed
Janssen Research & Development, LLC
Phase 3
655
California, Colorado, Florida, Georgia, Illinois, Iowa, Kansas, Michigan
2024-12-04
Recruiting
Janssen Research & Development, LLC
Phase 2/3
274
Arizona, California, Florida, Georgia, Illinois, Indiana, Maine, Maryland
2024-09-19
Active, closed
Janssen Research & Development, LLC
Phase 2
333
California, Colorado, Florida, Idaho, Illinois, Iowa, Minnesota, Missouri
2024-05-30
Recruiting
Janssen Research & Development, LLC
Phase 1/2
287
California, Colorado, Connecticut, Illinois, Maryland, Massachusetts, Michigan, Missouri
2024-04-22
Recruiting
Janssen Research & Development, LLC
Phase 3
641
Arkansas, California, Colorado, Florida, Illinois, Indiana, Kansas, Louisiana
2024-04-18
Active, closed
Janssen Research & Development, LLC
Phase 3
272
Arkansas, California, Colorado, Florida, Illinois, Indiana, Kansas, Michigan
2024-04-09
Active, closed
Janssen Research & Development, LLC
Phase 3
731
Arizona, California, Florida, Georgia, Illinois, Kentucky, Maryland, Massachusetts
2024-03-09
Active, closed
Janssen Research & Development, LLC
Phase 2
305
Arizona, California, Georgia, Illinois, Missouri, Nevada, New Jersey, New York
2024-02-16
Active, closed
Janssen Research & Development, LLC
Phase 3
838
California, Connecticut, Delaware, Florida, Georgia, Idaho, Illinois, Iowa
2024-01-22
Active, closed
Janssen Research & Development, LLC
Phase 3
774
Arizona, Arkansas, California, Florida, Georgia, Illinois, Indiana, Kentucky
2024-01-17
Recruiting
Janssen Research & Development, LLC
Phase 3
120
California, Colorado, Florida, Illinois, Indiana, Iowa, Kentucky, Maryland
2023-12-20
Active, closed
Janssen Research & Development, LLC
Phase 3
684
Arizona, Arkansas, California, Florida, Georgia, Illinois, Indiana, Kentucky
2023-10-12
Active, closed
Janssen Research & Development, LLC
Phase 3
311
Arizona, Arkansas, California, Florida, Georgia, Illinois, Indiana, Louisiana
2023-10-12
Active, closed
Janssen Research & Development, LLC
Phase 3
420
Alabama, Arizona, Arkansas, California, Colorado, Florida, Illinois, Indiana
2023-08-31
Active, closed
Janssen Research & Development, LLC
Phase 3
1,135
Arizona, Arkansas, California, Colorado, Florida, Georgia, Illinois, Indiana
2023-03-23
Recruiting
Janssen Research & Development, LLC
Phase 3
1,590
Arizona, California, Connecticut, Delaware, Florida, Georgia, Illinois, Iowa
2022-10-25
Active, closed
Janssen Research & Development, LLC
Phase 3
864
Arizona, Arkansas, Connecticut, District of Columbia, Florida, Illinois, Kansas, Louisiana
2022-10-13
Active, closed
Janssen Research & Development, LLC
Phase 1/2
235
Alabama, California, Colorado, Florida, Illinois, Indiana, Kentucky, Louisiana
2022-04-11
Recruiting
Janssen Research & Development, LLC
Phase 4
295
Arizona, California, Florida, Georgia, Illinois, Indiana, Kansas, Massachusetts
2022-03-09
Active, closed
Janssen Research & Development, LLC
Phase 4
411
Arizona, Arkansas, California, Connecticut, Florida, Illinois, Maryland, Michigan
2021-08-30
Recruiting
Janssen Research & Development, LLC
Phase 1/2
420
California, Illinois, Indiana, Kentucky, Massachusetts, Michigan, New Mexico, New York
2021-05-19
Recruiting
Janssen Research & Development, LLC
Phase 2
510
Alabama, Arkansas, California, Florida, Georgia, Illinois, Kentucky, Michigan
2021-02-01
Active, closed
Janssen Research & Development, LLC
Phase 2
220
Arizona, California, Colorado, Illinois, Indiana, Kansas, Michigan, New York
2020-12-18
Active, closed
Janssen Research & Development, LLC
Phase 3
518
California, Colorado, Florida, Georgia, Illinois, Michigan, Nebraska, New Jersey
2020-12-07
Active, closed
Janssen Research & Development, LLC
Phase 1
144
Arizona, California, Florida, Illinois, Louisiana, Minnesota, Nebraska, New York
2020-11-12
Active, closed
Janssen Research & Development, LLC
Phase 2
208
California, Connecticut, Florida, Georgia, Illinois, Indiana, Iowa, Kansas
2019-11-07
Active, closed
Janssen Research & Development, LLC
Phase 2/3
1,064
California, Colorado, Florida, Georgia, Illinois, Kansas, Kentucky, Massachusetts
2019-09-26
Active, closed
Janssen Research & Development, LLC
Phase 2/3
118
California, Colorado, Florida, Illinois, Kansas, Louisiana, Michigan, Missouri
2019-08-15
Active, closed
Janssen Research & Development, LLC
Phase 3
2,517
California, Colorado, Connecticut, Florida, Georgia, Illinois, Louisiana, Massachusetts
2019-06-11
Active, closed
Janssen Research & Development, LLC
Phase 3
765
Alabama, Arizona, Arkansas, California, Colorado, Connecticut, Florida, Illinois
2019-01-25
Active, closed
Janssen Research & Development, LLC
Phase 3
120
California, Georgia, Illinois, New Jersey, New York, Ohio, Texas
2018-07-11
Active, closed
Janssen Research & Development, LLC
Phase 2/3
1,409
Alabama, Arizona, California, Colorado, Florida, Georgia, Illinois, Indiana
2018-04-13
Active, closed
Janssen Research & Development, LLC
Phase 3
629
Alaska, California, District of Columbia, Florida, Georgia, Illinois, Kentucky, Maryland
2018-03-23
Active, closed
Janssen Research & Development, LLC
Phase 1
751
California, Florida, Illinois, Maryland, Massachusetts, Michigan, Minnesota, Missouri
2016-05-24
Active, closed
Janssen Research & Development, LLC
Phase 2
239
Arizona, California, Colorado, District of Columbia, Illinois, Iowa, Kentucky, Minnesota
2015-04-22
Active, closed
A Long-term Extension Study of PCI-32765 (Ibrutinib)
NCT01804686Chronic Lymphocytic Leukemia, Small Lymphocytic Lymphoma, Mantle Cell Lymphoma, Follicular Lymphoma
DrugIbrutinib
Janssen Research & Development, LLC
Phase 3
539
California, Connecticut, Georgia, Illinois, Indiana, Kansas, Kentucky, Massachusetts
2013-09-09
Rows per page Showing 1–56 of 56
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Cite this view

Priya Life Science (2026). Clinical trial register: industry-sponsored studies with a US investigative site, filtered. Derived from ClinicalTrials.gov. Retrieved 9 October 2026. https://priyalifescience.com/clinical-trials-usa/state/illinois

Query this register directly
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About this register

This register is built from ClinicalTrials.gov, the trial registry run by the U.S. National Library of Medicine. It includes every industry-sponsored study on the registry that lists at least one investigative site in the US and is recruiting, not yet recruiting, active but no longer recruiting, or enrolling by invitation: 9,125 studies in total at the last sync on 08 Oct 2026, 03:16 UTC. Academic and other non-industry sponsors are out of scope by design. The full list can be downloaded as CSV or queried as JSON through the register API.

This page shows the 56 of those studies with a site in Illinois that also match the filters currently applied.

How many clinical trials are recruiting in Illinois?

24 of the 56 studies on this page are recruiting new participants as of the 08 Oct 2026, 03:16 UTC sync. A further 0 have not yet opened recruitment, 32 are active but closed to new participants, and 0 are enrolling by invitation only. Eligibility for any study is decided by its study team.

Summary by phase

Studies by phase (Illinois), 56 studies
PhaseStudiesRecruitingShare
Phase 3341660.7%
Phase 29216.1%
Phase 2/3417.1%
Phase 1315.4%
Phase 1/2325.4%
Phase 4213.6%
Observational111.8%

Most active sponsors

Lead sponsors with the most studies (Illinois)
Lead sponsorStudiesRecruiting
Janssen Research & Development, LLC5624
Listing here is informational and not medical advice; eligibility is determined by each study team. Compare pay for the teams running these studies in the US Pharma Salary Guide, see who's behind them in the US Company Directory, or track approvals on the FDA Approvals Tracker. For Irish, UK and EU sites, see the Ireland, UK and EU registers.