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

Clinical Trials in California, 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 9159 matching records are in this view (non-industry sponsors are out of scope by design, not truncated). Synced 25 Oct 2026, 03:16 UTC
9159
Studies in scope
industry-sponsored, all four open statuses
4969
Recruiting now
open to new participants
2198
Lead sponsors
across recruiting studies
Top states
California 28 Florida 28 New York 22 Massachusetts 22 Illinois 17
Narrow the registerReset
Recruitment status
Phase
Lead sponsor
AstraZeneca231 Eli Lilly and Company157 AbbVie145 Merck Sharp & Dohme LLC129 Pfizer116 Clear sponsor filter
State
California28 Florida28 New York22 Massachusetts22 Illinois17
All 41 states
Target enrolment
to

Trials with a site in California

28 of 9159 studies
Download
Status
Study
Lead sponsor
Phase
Enrol
US states
Start
Recruiting
Daiichi Sankyo
Phase 1/2
220
California, Colorado, Connecticut, Massachusetts, New York, Oregon, Tennessee, Texas
2026-09-17
Recruiting
Daiichi Sankyo
Phase 1
60
California, Massachusetts, Michigan, New York, South Carolina, Texas, Virginia, Wisconsin
2025-12-03
Recruiting
Daiichi Sankyo
Phase 3
686
Alaska, California, Florida, Georgia, Hawaii, Illinois, Massachusetts, Minnesota
2025-10-24
Recruiting
Daiichi Sankyo
Phase 2/3
630
California, Colorado, Florida, Georgia, Illinois, Maryland, Massachusetts, Michigan
2025-09-26
Recruiting
Daiichi Sankyo
Phase 2
130
Alabama, California, Maryland, Massachusetts, New Jersey, New York, North Carolina, Pennsylvania
2025-07-18
Recruiting
Daiichi Sankyo
Phase 1
76
California, Georgia, Nevada, North Carolina, Ohio, Tennessee
2025-07-17
Recruiting
Daiichi Sankyo
Phase 3
510
Arizona, California, Michigan, Minnesota, Missouri, New Jersey, New York, Pennsylvania
2025-03-27
Recruiting
Daiichi Sankyo
Phase 3
582
California, Florida, Georgia, Illinois, Indiana, Louisiana, Maryland, Massachusetts
2025-03-19
Active, closed
Daiichi Sankyo
Phase 3
700
Arizona, California, Colorado, Connecticut, District of Columbia, Florida, Georgia, Illinois
2024-11-19
Active, closed
Daiichi Sankyo
Phase 1/2
137
California, Florida, Kentucky, Minnesota, New York, Pennsylvania, Virginia
2024-10-30
Recruiting
Daiichi Sankyo
Phase 1/2
123
Alabama, Arizona, California, Florida, Illinois, Michigan, Minnesota, New Hampshire
2024-07-22
Recruiting
Daiichi Sankyo
Phase 3
540
Arkansas, California, Florida, Illinois, Kentucky, Maryland, Massachusetts, Michigan
2024-05-21
Recruiting
Daiichi Sankyo
Phase 1/2
680
California, Illinois, Minnesota, New York, Tennessee, Texas, Utah, Virginia
2024-04-10
Recruiting
A Study of HER3-DXd in Subjects With Locally Advanced or Metastatic Solid Tumors
NCT06172478Advanced Solid Tumor, Melanoma, Head and Neck Cancer, Gastric Cancer
DrugPatritumab deruxtecan
Daiichi Sankyo
Phase 2
740
California, Connecticut, Florida, Illinois, Maryland, Minnesota, Missouri, New York
2024-02-26
Active, closed
Daiichi Sankyo
Phase 1
210
California, Florida, Hawaii, Illinois, Massachusetts, New York, North Carolina, Ohio
2024-02-22
Active, closed
Daiichi Sankyo
Phase 3
1,170
Alabama, Arizona, California, Colorado, Florida, Georgia, Illinois, Maryland
2023-01-11
Active, closed
Daiichi Sankyo
Phase 3
586
Alaska, Arkansas, California, Florida, Georgia, Idaho, Maryland, Massachusetts
2022-07-08
Active, closed
Daiichi Sankyo
Phase 3
740
Arizona, California, Colorado, Maryland, Massachusetts, New Hampshire, New Jersey, New York
2022-03-04
Active, closed
Daiichi Sankyo
Phase 1
246
California, Connecticut, District of Columbia, Illinois, Massachusetts, Michigan, New Hampshire, New York
2021-06-11
Active, closed
Daiichi Sankyo
Phase 2
155
California, Colorado, Georgia, Illinois, Massachusetts, Minnesota, Missouri, New Jersey
2021-06-03
Active, closed
HERTHENA-Lung01: Patritumab Deruxtecan in Subjects With Metastatic or Locally Advanced EGFR-mutated Non-Small Cell Lung Cancer
NCT04619004Non-Small Cell Lung Cancer Metastatic, Non-Small Cell Lung Cancer With Mutation in Epidermal Growth Factor Receptor
DrugPatritumab deruxtecan
Daiichi Sankyo
Phase 2
277
Arizona, California, Colorado, Florida, Georgia, Illinois, Maryland, Massachusetts
2021-02-02
Recruiting
Daiichi Sankyo
Observational
30
California, Massachusetts, New York, Ohio, Texas
2021-01-07
Active, closed
Daiichi Sankyo
Phase 3
605
Arizona, California, Florida, Illinois, Indiana, Kentucky, Louisiana, Maryland
2020-12-21
Active, closed
Daiichi Sankyo
Phase 3
1,600
California, Florida, Illinois, Kentucky, Louisiana, Maryland, New York, North Carolina
2020-12-04
Active, closed
Daiichi Sankyo
Phase 1
145
Arizona, California, District of Columbia, Florida, Maryland, Minnesota, New Mexico, Texas
2020-09-15
Active, closed
Daiichi Sankyo
Phase 1
115
California, Connecticut, Florida, Maryland, Massachusetts, Missouri, Pennsylvania, Texas
2020-02-10
Active, closed
Daiichi Sankyo
Phase 1/2
65
California, Colorado, Delaware, District of Columbia, Georgia, Minnesota, Ohio, Pennsylvania
2018-08-15
Active, closed
Daiichi Sankyo
Phase 1
312
California, Georgia, Massachusetts, Michigan, New York, Ohio, Pennsylvania, Tennessee
2017-10-30
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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 25 October 2026. https://priyalifescience.com/clinical-trials-usa/state/california

Query this register directly
GET /api/trials?country=usa&status=recruiting&format=json Try it now →

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: 9,159 studies in total at the last sync on 25 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 28 of those studies with a site in California that also match the filters currently applied.

How many clinical trials are recruiting in California?

13 of the 28 studies on this page are recruiting new participants as of the 25 Oct 2026, 03:16 UTC sync. A further 0 have not yet opened recruitment, 15 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 (California), 28 studies
PhaseStudiesRecruitingShare
Phase 310435.7%
Phase 17225%
Phase 1/25317.9%
Phase 24214.3%
Observational113.6%
Phase 2/3113.6%

Most active sponsors

Lead sponsors with the most studies (California)
Lead sponsorStudiesRecruiting
Daiichi Sankyo2813
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.