Medical Information Only. Consult your healthcare provider before considering clinical trial enrollment.
Williams Syndrome clinical trials
3 of 3 indexed Williams Syndrome trials are currently recruiting.
Corpus placement: #5,209 of 28,707 conditions by registered trial count.
3 US clinical trials · 3 currently recruiting · #5,209 of 28,707 conditions by registered trial count
Williams Syndrome: 3 US clinical trials tracked, 3 recruiting.
Williams Syndrome is the subject of 3 registered US clinical trials on ClinicalTrials.gov, 3 of them currently open to new participants. The most active sponsor is National Institute of Mental Health (NIMH), running 1 of these trials.
Enrollment posture brief
Registry condition williams-syndrome
OPEN 3 | RECR 100% | LATE 0 | EARLY 0 | RANK #5209 | SPON 1
Volume-matched condition peers
Nearest open-share peer: Aortic Arch Aneurysm (100% recruiting · 5 trials)
Williams Syndrome lists 3 open slots (100% of 3 indexed trials). Peers are matched on registered volume, not therapeutic-area browse lists. How peer matching works →
Key findings
What ClinicalTrials.gov does not surface for Williams Syndrome on its own pages , computed from the registry mirror as of 2026-08-08. Each line carries its own denominator so it can be quoted as it stands.
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Williams Syndrome is recruiting above its size-band peers.
3 of 3 indexed trials (100%) are open to enrollment, against a 46.5% average across 27,806 conditions with fewer than 20 trials. The peer set uses the same ClinicalTrials.gov-derived counts as this page.
Open and recent trials
3 total, page 1 of 1
Characterization and Natural History of Williams Syndrome and Other Chromosome 7q11.23 Variants
University of Pennsylvania
NCT06930417
Williams Syndrome (WS) and Supravalvar Aortic Stenosis (SVAS) DNA and Tissue Bank
National Heart, Lung, and Blood Institute (NHLBI)
NCT02706639
Defining the Brain Phenotype of Children With Williams Syndrome
National Institute of Mental Health (NIMH)
NCT01132885
Phase Distribution
Phase data not available
Top Sponsors
US sites by state
Facility locations filed on Williams Syndrome trials. A trial with sites in several states counts in each.
Source: ClinicalTrials.gov, National Library of Medicine. Data is informational only.
Related
What to do with this Williams Syndrome page
3 registered trials, 3 currently recruiting, is a starting point for a conversation, not a diagnosis or a recommendation.
- 3 Williams Syndrome trials are currently recruiting, check eligibility criteria before contacting a site. Browse recruiting trials
- National Institute of Mental Health (NIMH) sponsors the most Williams Syndrome trials on record, review their full trial history before evaluating a specific study. See National Institute of Mental Health (NIMH)'s trials
- Bring the specific trial ID (NCT number) to your own doctor before enrolling, this page is a directory, not medical guidance. Read the trial-finding guide
Trial and recruiting counts reflect ClinicalTrials.gov registry status as of the data vintage above; individual trial eligibility and enrollment status can change.
Every figure on PlainTrial is rendered directly from the ClinicalTrials.gov registry, no number is typed in by an editor. This Williams Syndrome condition card totals 3 registered trials; top US site state Maryland. See our editorial standards & corrections policy, the methodology behind these numbers, the data changelog, or report a data error.