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

Clinical Trials in Connecticut, 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.

Download CSV
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
Eli Lilly and Company58 AstraZeneca58 AbbVie48 Merck Sharp & Dohme LLC39 Janssen Research & Development, LLC39 Clear sponsor filter
State
California109 Florida91 Colorado71 Georgia67 Illinois56
All 42 states
Target enrolment
to

Trials with a site in Connecticut

39 of 9125 studies
Download
Status
Study
Lead sponsor
Phase
Enrol
US states
Start
Recruiting
Janssen Research & Development, LLC
Phase 3
700
Alabama, Arizona, Arkansas, California, Colorado, Connecticut, Florida, Georgia
2026-05-31
Recruiting
Janssen Research & Development, LLC
Phase 3
530
Alabama, California, Colorado, Connecticut, Florida, Georgia, Iowa, Kansas
2026-04-21
Recruiting
Janssen Research & Development, LLC
Phase 1
170
Connecticut, Florida, Massachusetts, Tennessee, Texas, Virginia
2026-04-09
Recruiting
Janssen Research & Development, LLC
Phase 3
400
Arizona, Arkansas, California, Colorado, Connecticut, Florida, Georgia, Illinois
2026-02-04
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
500
Arizona, California, Connecticut, Florida, Georgia, Illinois, Kentucky, Maryland
2025-12-03
Recruiting
Janssen Research & Development, LLC
Phase 2/3
1,092
Arizona, California, Colorado, Connecticut, Florida, Georgia, Indiana, Kansas
2025-10-03
Recruiting
Janssen Research & Development, LLC
Phase 3
882
Arizona, California, Colorado, Connecticut, Florida, Georgia, Indiana, Kansas
2025-10-01
Recruiting
Janssen Research & Development, LLC
Phase 3
1,203
California, Colorado, Connecticut, District of Columbia, Florida, Iowa, Louisiana, Maryland
2025-09-02
Active, closed
Janssen Research & Development, LLC
Phase 3
752
Alabama, California, Connecticut, Florida, Georgia, Illinois, Indiana, Iowa
2025-04-15
Recruiting
Janssen Research & Development, LLC
Phase 1/2
190
Colorado, Connecticut, Florida, Louisiana, Massachusetts, Michigan, Nebraska, New York
2025-02-06
Recruiting
Janssen Research & Development, LLC
Phase 2
480
Alabama, Arizona, California, Colorado, Connecticut, Delaware, District of Columbia, Florida
2024-12-16
Recruiting
Janssen Research & Development, LLC
Phase 3
700
Arizona, Arkansas, California, Colorado, Connecticut, Florida, Georgia, Illinois
2024-12-12
Recruiting
Janssen Research & Development, LLC
Phase 3
1,000
Arizona, Arkansas, California, Colorado, Connecticut, District of Columbia, Florida, Georgia
2024-10-18
Recruiting
Janssen Research & Development, LLC
Phase 2
210
California, Colorado, Connecticut, New York, North Carolina, Ohio, Virginia, Washington
2024-08-26
Recruiting
Janssen Research & Development, LLC
Phase 3
752
Alabama, Arizona, Arkansas, California, Colorado, Connecticut, Florida, Georgia
2024-07-25
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
120
California, Connecticut, Georgia, Indiana, Massachusetts, New Jersey, New York, Ohio
2024-03-13
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
20,284
Alabama, Arizona, Arkansas, California, Colorado, Connecticut, Delaware, District of Columbia
2023-04-11
Active, closed
Janssen Research & Development, LLC
Phase 3
614
Alaska, Arizona, California, Colorado, Connecticut, Florida, Iowa, Louisiana
2023-03-29
Active, closed
Janssen Research & Development, LLC
Phase 3
12,523
Arizona, Arkansas, California, Colorado, Connecticut, District of Columbia, Florida, Georgia
2023-02-15
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 2
577
California, Colorado, Connecticut, District of Columbia, Florida, Georgia, Idaho, Indiana
2022-09-19
Active, closed
Janssen Research & Development, LLC
Phase 2
703
Alabama, Arizona, Arkansas, California, Colorado, Connecticut, District of Columbia, Florida
2022-07-22
Active, closed
Janssen Research & Development, LLC
Phase 2
151
California, Connecticut, Florida, Georgia, Massachusetts, Michigan, New York, North Carolina
2022-03-01
Active, closed
Janssen Research & Development, LLC
Phase 3
350
Alabama, Arizona, Arkansas, California, Colorado, Connecticut, Florida, Georgia
2022-01-19
Active, closed
Janssen Research & Development, LLC
Phase 3
587
Alabama, California, Connecticut, Georgia, Massachusetts, Michigan, Ohio, Pennsylvania
2021-10-14
Active, closed
Janssen Research & Development, LLC
Phase 4
411
Arizona, Arkansas, California, Connecticut, Florida, Illinois, Maryland, Michigan
2021-08-30
Active, closed
Janssen Research & Development, LLC
Phase 3
743
California, Connecticut, Florida, Iowa, Kentucky, Maryland, Massachusetts, Michigan
2021-08-19
Recruiting
Janssen Research & Development, LLC
Phase 3
199
Arizona, California, Colorado, Connecticut, Florida, Georgia, Kansas, Massachusetts
2021-07-15
Active, closed
Janssen Research & Development, LLC
Phase 3
696
Alabama, Arizona, California, Colorado, Connecticut, Florida, Indiana, Louisiana
2020-09-23
Active, closed
Janssen Research & Development, LLC
Phase 3
419
Alabama, Arizona, California, Colorado, Connecticut, Florida, Iowa, Kansas
2020-06-12
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 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
84
California, Colorado, Connecticut, Delaware, Georgia, Minnesota, New York, Tennessee
2018-10-29
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 1–39 of 39
1
Cite this view

Priya Life Science (2026). Clinical trial register: industry-sponsored studies with a US investigative site, filtered. Derived from ClinicalTrials.gov. Retrieved 8 October 2026. https://priyalifescience.com/clinical-trials-usa/state/connecticut

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 39 of those studies with a site in Connecticut that also match the filters currently applied.

How many clinical trials are recruiting in Connecticut?

19 of the 39 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, 20 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 (Connecticut), 39 studies
PhaseStudiesRecruitingShare
Phase 3281371.8%
Phase 26215.4%
Phase 1/2225.1%
Phase 1112.6%
Phase 2/3112.6%
Phase 4102.6%

Most active sponsors

Lead sponsors with the most studies (Connecticut)
Lead sponsorStudiesRecruiting
Janssen Research & Development, LLC3919
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.