Clinical trials
Completed Observational trials in the United States
Search ClinicalTrials.gov registrations by keyword, then narrow by condition, phase, status, country and start year.
18,840 trials match Source: ClinicalTrials.gov registrations
Trials started per year
By phase, 2000 to 2026.
| Category | Trials |
|---|---|
| 2000 | 167 |
| 2001 | 214 |
| 2002 | 232 |
| 2003 | 370 |
| 2004 | 448 |
| 2005 | 573 |
| 2006 | 705 |
| 2007 | 800 |
| 2008 | 894 |
| 2009 | 891 |
| 2010 | 952 |
| 2011 | 922 |
| 2012 | 951 |
| 2013 | 912 |
| 2014 | 954 |
| 2015 | 890 |
| 2016 | 850 |
| 2017 | 968 |
| 2018 | 886 |
| 2019 | 866 |
| 2020 | 939 |
| 2021 | 913 |
| 2022 | 662 |
| 2023 | 517 |
| 2024 | 342 |
| 2025 | 214 |
| 2026 | 43 |
Status
Trials by registry status. Select a bar to filter.
| Category | Trials |
|---|---|
| Completed | 18,840 |
Top lead sponsors
A sponsor with a page on Pharma Observatory links to it.
| Category | Trials |
|---|---|
| Mayo Clinic | 429 |
| National Institute of Neurological Disorders and Stroke (NINDS) | 308 |
| Duke University | 279 |
| National Institute of Allergy and Infectious Diseases (NIAID) | 275 |
| National Cancer Institute (NCI) | 271 |
| Memorial Sloan Kettering Cancer Center | 244 |
| University of Pittsburgh | 235 |
| Stanford University | 226 |
| University of California, San Francisco | 208 |
| M.D. Anderson Cancer Center | 200 |
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 | 599 |
| Neoplasms | 436 |
| Obesity | 430 |
| Diabetes Mellitus | 333 |
| COVID-19 | 323 |
| HIV Infections | 304 |
| Heart Failure | 297 |
| Asthma | 232 |
| Lung Neoplasms | 232 |
| Coronary Artery Disease | 231 |
Trials
Showing 1 to 25 of 18,840. Each trial links to its page on Pharma Observatory.
18,740 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.