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.
8,581 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 | 368 |
| 2016 | 447 |
| 2017 | 492 |
| 2018 | 526 |
| 2019 | 557 |
| 2020 | 668 |
| 2021 | 763 |
| 2022 | 654 |
| 2023 | 564 |
| 2024 | 234 |
| 2025 | 4 |
Status
Trials by registry status. Select a bar to filter.
| Category | Trials |
|---|---|
| Unknown status | 8,581 |
Top lead sponsors
A sponsor with a page on Pharma Observatory links to it.
| Category | Trials |
|---|---|
| Massachusetts General Hospital | 134 |
| University of Virginia | 120 |
| University of Washington | 79 |
| Brigham and Women's Hospital | 75 |
| M.D. Anderson Cancer Center | 75 |
| University of Colorado, Denver | 75 |
| 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 1 to 25 of 8,581. Each trial links to its page on Pharma Observatory.
8,481 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.