Pfizer

Open enrollment with an early-phase pipeline tilt

According to ClinicalTrials.gov-derived indexes, Pfizer sits in the top decile of US sponsors by registered trial count (#7 of 15,742 sponsors by registered trial count).

1,845 total trials 106 currently recruiting 1335 completed early-phase tilt top decile by trial count

Pfizer: 1,845 sponsored US clinical trials, 106 recruiting.

Pfizer sponsors 1,845 registered US clinical trials on ClinicalTrials.gov, 106 of them currently recruiting, and 1,335 completed. 504 of these trials are in Phase 3-4 (later-stage) and 1,173 in Phase 1-2 (earlier-stage). The most-studied condition in this pipeline is Healthy, with 44 trials.

Top-decile sponsor footprint

Pfizer ranks in the top decile of sponsors by registered trial count (#7 of 15,742 sponsors by registered trial count). Volume at this scale usually reflects a long institutional pipeline, read phase tilt and therapeutic areas below before treating it as current-year activity.

Trial completion reliability score

F 39/100

1,335 of 1,673 decided trials (Completed vs. Terminated on ClinicalTrials.gov) reached their planned completion (79.8%), vs. national p10 68.4% / p90 100% among 1,234 sponsors with at least 10 decided trials. Still-open trials (Recruiting, Active-not-recruiting, Not-yet-recruiting) are excluded since they have not reached an outcome yet.

Open and recent trials

1,845 total, page 37 of 37

COMPLETED Phase 2

Leflunomide in Treating Patients With Anaplastic Astrocytoma in First Relapse

NCT00003775

COMPLETED Phase 3

To Evaluate the Long-Term Safety and Efficacy of Pregabalin in Patients With Partial Seizures

NCT00141388

COMPLETED Phase 1

SU5416 in Treating Patients With AIDS-Related Kaposi's Sarcoma

NCT00003720

COMPLETED Phase 4

A Study to Determine the Degree of Additional Reduction in CV Risk in Lowering LDL Below Minimum Target Levels

NCT00327691

COMPLETED Phase 4

Depo-Provera: Bone Mineral Density and Total Body Calcium in Adolescent DP150CI Users and Non-Hormonal Contraception

NCT00139685

COMPLETED Phase 2

CMA-676 in Treating Older Patients With Acute Myeloid Leukemia in First Relapse

NCT00003673

COMPLETED Phase 3

Chemotherapy in Treating Patients Who Have Metastatic Prostate Cancer

NCT00003343

COMPLETED Phase 3

SU-101 Compared With Procarbazine in Treating Patients With Glioblastoma Multiforme

NCT00003293

COMPLETED Phase 3

Randomized Trial Of Exemestane Versus Continued Tamoxifen In Postmenopausal Women With Early Breast Cancer

NCT00038467

COMPLETED Phase 2

To Evaluate the Long-Term Safety of Pregabalin in Refractory Partial Epilepsy.

NCT00141414

COMPLETED Phase 2

CMA-676 in Treating Patients With Acute Myeloid Leukemia in First Relapse

NCT00003131

COMPLETED Phase 3

A 6 Month Study Comparing Latanoprost With Timolol in Patients With Open Angle Glaucoma or Ocular Hypertension

NCT00751127

COMPLETED NA

Comparative Randomized Study of the Efficacy, Safety, and Toleration of Fluconazole Oral Suspension or Nystatin Oral Suspension in the Treatment of Patients With Oropharyngeal Candidiasis in Association With the Acquired Immunodeficiency Syndrome

NCT00002112

COMPLETED Phase 2

Study of the Efficacy of an Investigational Drug in Adult Patients With Non Small-Cell Lung Cancer (NSCLC)

NCT00034957

COMPLETED NA

Azithromycin in the Treatment of Cryptosporidiosis in Patients With Acquired Immune Deficiency Syndrome (AIDS): A Randomized, Multi-Center, Placebo-Controlled, Double-Blind Study

NCT00002082

COMPLETED NA

A Study of Fluconazole in the Treatment of Cryptococcal Meningitis in Patients Who Have Not Had Success With Amphotericin B

NCT00002306

COMPLETED NA

A Comparison of the Safety and Effectiveness of Fluconazole or Clotrimazole in the Treatment of Fungal Infections of the Mouth and Throat in Patients With AIDS

NCT00002282

COMPLETED NA

A Study of Azithromycin in the Prevention of Mycobacterium Avium Complex Disease (MAC) in HIV-Infected Patients

NCT00002309

COMPLETED NA

Open, Non-Comparative Study of Intravenous and Oral Fluconazole in the Treatment of Acute Cryptococcal Meningitis

NCT00002040

COMPLETED Phase 1

A Study of Azithromycin in HIV-Infected Patients

NCT00002344

COMPLETED NA

A Comparison of Fluconazole and Ketoconazole in the Treatment of Fungal Infections of the Throat in Patients With Weakened Immune Systems

NCT00002304

COMPLETED Phase 1

Phase I Study of the Clinical Pharmacology of Azithromycin in Buffy Coat of HIV-Infected Subjects.

NCT00002139

COMPLETED NA

Multicenter Comparison of Fluconazole (UK-49,858) and Amphotericin B as Maintenance Treatment for the Prevention of Relapse of Cryptococcal Meningitis in Patients With Acquired Immunodeficiency Syndrome

NCT00002074

COMPLETED Phase 1

Study of the Safety and Efficacy of an Investigational Drug in Adult Patients With Multiple Myeloma

NCT00036140

COMPLETED NA

An Open, Multicenter, Randomized, Dose-Ranging Study of Azithromycin in the Treatment of Disseminated Mycobacterium Avium-Intracellulare Complex Infection (MAC) in Patients With Acquired Immune Deficiency Syndrome (AIDS)

NCT00002090

COMPLETED NA

Open, Non-Comparative Study of Fluconazole in Patients With Coccidioidal Meningitis

NCT00002010

COMPLETED NA

A Pilot Study of Fluconazole Plus Flucytosine for the Treatment of AIDS Patients With Acute Cryptococcal Meningitis.

NCT00002113

COMPLETED NA

A Study of Fluconazole in the Treatment of Cryptococcal Meningitis in Patients With AIDS

NCT00002294

COMPLETED Phase 3

A Randomized Study of Daily and Intermittent Prophylactic Regimens for the Prevention of Disseminated Mycobacterium Avium Complex (MAC) and Fungal Infections in HIV-Infected Patients

NCT00002122

COMPLETED Phase 3

A Study of Fluconazole in the Treatment of Fungal Infections of the Throat in Patients With Weakened Immune Systems

NCT00002339

COMPLETED NA

A Multicenter Comparison of Fluconazole (UK-49,858) and Amphotericin B as Treatment for Acute Cryptococcal Meningitis

NCT00002068

COMPLETED NA

A Comparison of Fluconazole and Amphotericin B in the Treatment of Cryptococcal Meningitis

NCT00002305

COMPLETED NA

Pilot Study of Oral Fluconazole in the Treatment of Acute Cryptococcal Meningitis

NCT00002076

COMPLETED NA

Multicenter Comparison of Fluconazole (UK-49,858) and Amphotericin B as Treatment for Acute Cryptococcal Meningitis

NCT00002075

COMPLETED Phase 3

Comparison of Fluconazole and Amphotericin B in the Treatment of Brain Infections in Patients With AIDS

NCT00001017

COMPLETED NA

An Open-Label Study of the Use of Azithromycin in Patients With Symptomatic Disseminated Mycobacterium Avium-Intracellulare Complex (MAC) Infection Failing Current Therapy

NCT00002089

COMPLETED Phase 1

A Study of Azithromycin Plus Pyrimethamine in the Treatment of a Brain Infection in Patients With AIDS

NCT00000966

COMPLETED Phase 3

A Randomized, Double-Blind, Comparative Study of Azithromycin Versus Clarithromycin in Combination With Ethambutol for the Treatment of Disseminated Mycobacterium Avium Complex (MAC) Infection in AIDs Patients

NCT00002140

COMPLETED NA

An Open, Non-Comparative Study of Intravenous and Oral Fluconazole in the Treatment of Acute Cryptococcal Meningitis

NCT00002077

COMPLETED NA

A Study to Evaluate the Safety and Efficacy of Azithromycin in Individual Patients With Serious Nontuberculous Mycobacterial Disease Who Are Failing or Intolerant of Other Available Therapy

NCT00002085

COMPLETED Phase 3

A Comparison of Fluconazole and Amphotericin B in the Treatment of Fungal Infections

NCT00002277

COMPLETED NA

Non-Comparative Study of Fluconazole in Patients With Serious Mycoses and Who Cannot Be Treated With Conventional Antifungal Therapy

NCT00002038

COMPLETED Phase 1

Irinotecan in Treating Patients With Refractory Solid Tumors and Liver Dysfunction

NCT00037804

COMPLETED NA

A Study of Fluconazole in the Prevention of Fungal Infections in HIV-Infected Patients Living in Areas Where Fungal Infections Are Common

NCT00002325

COMPLETED NA

Azithromycin in the Treatment of Cryptosporidiosis in Patients Who Have Not Had Success With Other Drugs

NCT00002328

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Phase Distribution

PhaseTrial count
Phase 1 703
Phase 2 470
Phase 3 411
Phase 4 93

What is open in the Pfizer pipeline

106 recruiting of 1,845 indexed (6% open); 1,335 completed (72%).

Phase mix: 504 late (III/IV) vs 1,173 early (I/II) (early-phase heavy).

Top condition: Healthy (44 trials), 9 others listed.

How open-pipeline share is computed

Recruiting share is recruiting_count divided by trial_count for this sponsor in the public registry export. Status can change between pulls; treat the figure as a research-attention snapshot, not product availability.

Pfizer: open-pipeline peers nationwide

Peers matched on 1,845 registered trials and 6% open enrollment, not the therapeutic-area sidebar.

Pfizer sits at or above the median trial volume and below the median recruiting share among these 9 nationwide peers -- the two do not always move together. Source: ClinicalTrials.gov (2026-08-08 snapshot). 2×2 strategic matrix plotting 9 entities by Total trials (X) and Recruiting share (Y), with a crosshair dividing the plot into four quadrants. Higher volume & more openFocused & more openHigher volume, mostly closedSmaller & mostly closed 05001,0001,5002,000 5%10%15%20% Total trials Recruiting share PfizerMemorial Sloan Kettering Cancer CenterStanford UniversityDuke UniversityUniversity of California, San FranciscoPacira PharmaceuticalsBioDelivery Sciences InternationalColgate PalmoliveDurham VA Medical Center
Pfizer sits at or above the median trial volume and below the median recruiting share among these 9 nationwide peers -- the two do not always move together. Source: ClinicalTrials.gov (2026-08-08 snapshot).

Pfizer sits at or above the median trial volume and below the median recruiting share among these 9 nationwide peers -- the two do not always move together.

Sponsors near 1,845 trials (± recruiting share)

Sponsors near 6% open enrollment (± trial volume)

What to do with this Pfizer page

1,845 registered trials is a research-attention snapshot, not an endorsement of Pfizer or any single study.

  • 106 of Pfizer's trials are currently recruiting, check each one's own eligibility criteria before contacting a site. Browse recruiting trials
  • Healthy is the condition Pfizer studies most, compare against other sponsors active in the same condition before evaluating a specific study. See Healthy 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. Pfizer pipeline card: 1,845 registered trials from official public datasets. See our editorial standards & corrections policy, the methodology behind these numbers, the data changelog, or report a data error.