Clinical trials
Completed trials in the United States
Search ClinicalTrials.gov registrations by keyword, then narrow by condition, phase, status, country and start year.
121,033 trials match Source: ClinicalTrials.gov registrations
Trials started per year
By phase, 2000 to 2026.
| Category | Trials |
|---|---|
| 2000 | 1,151 |
| 2001 | 1,392 |
| 2002 | 1,831 |
| 2003 | 2,499 |
| 2004 | 3,152 |
| 2005 | 3,712 |
| 2006 | 4,285 |
| 2007 | 4,610 |
| 2008 | 5,125 |
| 2009 | 5,308 |
| 2010 | 5,364 |
| 2011 | 5,311 |
| 2012 | 5,451 |
| 2013 | 5,572 |
| 2014 | 5,743 |
| 2015 | 5,910 |
| 2016 | 5,802 |
| 2017 | 6,577 |
| 2018 | 6,504 |
| 2019 | 6,132 |
| 2020 | 5,556 |
| 2021 | 5,953 |
| 2022 | 4,860 |
| 2023 | 3,954 |
| 2024 | 2,823 |
| 2025 | 1,523 |
| 2026 | 285 |
Status
Trials by registry status. Select a bar to filter.
| Category | Trials |
|---|---|
| Completed | 121,033 |
Top lead sponsors
A sponsor with a page on Pharma Observatory links to it.
| Category | Trials |
|---|---|
| National Cancer Institute (NCI) | 2,071 |
| Mayo Clinic | 1,872 |
| National Institute of Allergy and Infectious Diseases (NIAID) | 1,665 |
| Pfizer | 1,360 |
| Massachusetts General Hospital | 1,346 |
| Duke University | 1,280 |
| M.D. Anderson Cancer Center | 1,232 |
| University of California, San Francisco | 1,181 |
| VA Office of Research and Development | 1,173 |
| Stanford University | 1,165 |
Top conditions
MeSH conditions the trials were registered with, not their broader categories. A condition with a page on Pharma Observatory links to it.
| Category | Trials |
|---|---|
| Breast Neoplasms | 3,320 |
| Obesity | 3,296 |
| Neoplasms | 2,781 |
| HIV Infections | 2,393 |
| Diabetes Mellitus, Type 2 | 2,353 |
| Diabetes Mellitus | 2,148 |
| Prostatic Neoplasms | 1,765 |
| Pain | 1,762 |
| Carcinoma, Non-Small-Cell Lung | 1,525 |
| Anxiety Disorders | 1,458 |
Trials
Showing 76 to 100 of 121,033. Each trial links to its page on Pharma Observatory.
120,933 more trials match. See them on Pharma Observatory
Recently changed trials
Changes observed in the last 7 days, newest first, site-count changes left out. Source: ClinicalTrials.gov.
Go deeper on Pharma Observatory
Pharma Observatory connects clinical trials, sponsors, sites and investigators in one searchable platform.