{"as_of":"2026-10-15T04:49:15.074Z","query":{"query.spons":"Pfizer"},"trials_analyzed":200,"by_phase":[{"key":"PHASE1","trials":62,"enrollment_total":4229},{"key":"NA","trials":42,"enrollment_total":65866},{"key":"PHASE2","trials":41,"enrollment_total":7469},{"key":"PHASE3","trials":37,"enrollment_total":16575},{"key":"PHASE4","trials":22,"enrollment_total":5987}],"by_status":[{"key":"COMPLETED","trials":159,"enrollment_total":77201},{"key":"TERMINATED","trials":18,"enrollment_total":1579},{"key":"RECRUITING","trials":8,"enrollment_total":8835},{"key":"WITHDRAWN","trials":7,"enrollment_total":0},{"key":"UNKNOWN","trials":5,"enrollment_total":248},{"key":"ACTIVE_NOT_RECRUITING","trials":2,"enrollment_total":12027},{"key":"APPROVED_FOR_MARKETING","trials":1,"enrollment_total":null}],"by_study_type":[{"key":"INTERVENTIONAL","trials":166,"enrollment_total":35581},{"key":"OBSERVATIONAL","trials":33,"enrollment_total":64309},{"key":"EXPANDED_ACCESS","trials":1,"enrollment_total":null}],"top_sponsors":[{"key":"Pfizer","trials":114,"enrollment_total":59080},{"key":"Pfizer's Upjohn has merged with Mylan to form Viatris Inc.","trials":20,"enrollment_total":9685},{"key":"Wyeth is now a wholly owned subsidiary of Pfizer","trials":14,"enrollment_total":2583},{"key":"Array Biopharma, now a wholly owned subsidiary of Pfizer","trials":2,"enrollment_total":105},{"key":"University of California, San Francisco","trials":2,"enrollment_total":971},{"key":"H. Lee Moffitt Cancer Center and Research Institute","trials":1,"enrollment_total":20},{"key":"University of Padova","trials":1,"enrollment_total":31},{"key":"Alberta Health services","trials":1,"enrollment_total":30},{"key":"Ontario Clinical Oncology Group (OCOG)","trials":1,"enrollment_total":77},{"key":"Swansea University","trials":1,"enrollment_total":32},{"key":"University of Nottingham","trials":1,"enrollment_total":95},{"key":"Cardiff University","trials":1,"enrollment_total":14},{"key":"University of Southern Denmark","trials":1,"enrollment_total":186},{"key":"Grupo Espanol de Tumores Neuroendocrinos","trials":1,"enrollment_total":17},{"key":"University of Texas Southwestern Medical Center","trials":1,"enrollment_total":29}],"active_trials":10,"total_enrollment":99890,"note":"Distributions are computed over the sample of trials matching the query (capped by `sample`), newest registry order — a shape of the pipeline, not a registry census. Enrollment is the registered target or actual count as submitted.","source":"Source: National Library of Medicine (ClinicalTrials.gov)","disclaimer":"Courtesy of the National Library of Medicine (ClinicalTrials.gov), retrieved at as_of; distributions and totals are computed by AnswerPool. Registry entries are submitted by sponsors and reflect what was registered, not verified outcomes. Not medical advice.","refresh_after":"2026-10-16T00:00:00.000Z"}