Clinical trials
Trials in the United States with unknown status
Search ClinicalTrials.gov registrations by keyword, then narrow by condition, phase, status, country and start year.
8,564 trials match Source: ClinicalTrials.gov registrations
Trials started per year
By phase, 2000 to 2026.
| Category | Trials |
|---|---|
| 2000 | 76 |
| 2001 | 73 |
| 2002 | 70 |
| 2003 | 73 |
| 2004 | 117 |
| 2005 | 161 |
| 2006 | 207 |
| 2007 | 204 |
| 2008 | 236 |
| 2009 | 260 |
| 2010 | 233 |
| 2011 | 285 |
| 2012 | 302 |
| 2013 | 353 |
| 2014 | 365 |
| 2015 | 366 |
| 2016 | 447 |
| 2017 | 492 |
| 2018 | 523 |
| 2019 | 556 |
| 2020 | 667 |
| 2021 | 759 |
| 2022 | 651 |
| 2023 | 561 |
| 2024 | 234 |
| 2025 | 4 |
Status
Trials by registry status. Select a bar to filter.
| Category | Trials |
|---|---|
| Unknown status | 8,564 |
Top lead sponsors
A sponsor with a page on Pharma Observatory links to it.
| Category | Trials |
|---|---|
| Massachusetts General Hospital | 133 |
| University of Virginia | 120 |
| University of Washington | 79 |
| Brigham and Women's Hospital | 75 |
| M.D. Anderson Cancer Center | 75 |
| University of Colorado, Denver | 74 |
| Rothman Institute Orthopaedics | 73 |
| National Center for Research Resources (NCRR) | 66 |
| Oregon Health and Science University | 61 |
| Kessler Foundation | 57 |
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 | 225 |
| Obesity | 192 |
| Neoplasms | 155 |
| Diabetes Mellitus | 138 |
| COVID-19 | 127 |
| Anxiety Disorders | 123 |
| Prostatic Neoplasms | 122 |
| Stroke | 119 |
| Pain | 118 |
| Heart Failure | 105 |
Trials
Showing 51 to 75 of 8,564. Each trial links to its page on Pharma Observatory.
8,464 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.
No changes to these trials in the last 7 days.
Go deeper on Pharma Observatory
Pharma Observatory connects clinical trials, sponsors, sites and investigators in one searchable platform.