Clinical trials
Completed Observational trials
Search ClinicalTrials.gov registrations by keyword, then narrow by condition, phase, status, country and start year.
72,151 trials match Source: ClinicalTrials.gov registrations
Trials started per year
By phase, 2000 to 2026.
| Category | Trials |
|---|---|
| 2000 | 365 |
| 2001 | 395 |
| 2002 | 473 |
| 2003 | 694 |
| 2004 | 891 |
| 2005 | 1,167 |
| 2006 | 1,541 |
| 2007 | 1,889 |
| 2008 | 2,237 |
| 2009 | 2,520 |
| 2010 | 2,923 |
| 2011 | 2,882 |
| 2012 | 3,071 |
| 2013 | 3,043 |
| 2014 | 3,402 |
| 2015 | 3,644 |
| 2016 | 3,893 |
| 2017 | 4,059 |
| 2018 | 4,290 |
| 2019 | 4,381 |
| 2020 | 5,210 |
| 2021 | 4,903 |
| 2022 | 4,092 |
| 2023 | 3,376 |
| 2024 | 2,738 |
| 2025 | 1,798 |
| 2026 | 438 |
Status
Trials by registry status. Select a bar to filter.
| Category | Trials |
|---|---|
| Completed | 72,151 |
Top lead sponsors
A sponsor with a page on Pharma Observatory links to it.
| Category | Trials |
|---|---|
| AstraZeneca | 758 |
| National Heart, Lung, and Blood Institute (NHLBI) | 633 |
| Assistance Publique - Hôpitaux de Paris | 604 |
| Hospices Civils de Lyon | 468 |
| Mayo Clinic | 452 |
| Bayer | 449 |
| Pfizer | 433 |
| University Hospital, Montpellier | 405 |
| National Taiwan University Hospital | 385 |
| Cairo University | 383 |
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 |
|---|---|
| COVID-19 | 1,841 |
| Breast Neoplasms | 1,428 |
| Obesity | 1,283 |
| Neoplasms | 1,201 |
| Cardiovascular Diseases | 1,190 |
| Diabetes Mellitus | 1,188 |
| Diabetes Mellitus, Type 2 | 1,060 |
| Stroke | 993 |
| Heart Failure | 872 |
| Pulmonary Disease, Chronic Obstructive | 852 |
Trials
Showing 1 to 25 of 72,151. Each trial links to its page on Pharma Observatory.
72,051 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.