Sanofi Pasteur, a Sanofi Company

Open enrollment across a mixed-phase pipeline

According to ClinicalTrials.gov-derived indexes, Sanofi Pasteur, a Sanofi Company sits in the top decile of US sponsors by registered trial count (#190 of 15,742 sponsors by registered trial count).

153 total trials 3 currently recruiting 132 completed top decile by trial count

Sanofi Pasteur, a Sanofi Company: 153 sponsored US clinical trials, 3 recruiting.

Sanofi Pasteur, a Sanofi Company sponsors 153 registered US clinical trials on ClinicalTrials.gov, 3 of them currently recruiting, and 132 completed. 71 of these trials are in Phase 3-4 (later-stage) and 67 in Phase 1-2 (earlier-stage). The most-studied condition in this pipeline is Influenza, with 16 trials.

Top-decile sponsor footprint

Sanofi Pasteur, a Sanofi Company ranks in the top decile of sponsors by registered trial count (#190 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

C 69/100

132 of 144 decided trials (Completed vs. Terminated on ClinicalTrials.gov) reached their planned completion (91.7%), 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

153 total, page 3 of 4

COMPLETED Phase 2

A Study of Different Formulations of an A/H1N1 Pandemic Vaccine in Healthy Children Aged 6 Months to 9 Years

NCT00952419

COMPLETED Phase 2

A Study of Different Formulations of an A/H1N1 Pandemic Vaccine in Healthy Adults and the Elderly

NCT00953524

COMPLETED Phase 2

Study of a Clostridium Difficile Toxoid Vaccine (ACAM-CDIFF™) in Subjects With Clostridium Difficile Infection

NCT00772343

COMPLETED

Surveillance Program to Determine Product Specific Rates of Invasive Hib Disease

NCT00855855

COMPLETED

Persistence of Bactericidal Antibodies in Adolescents and Adults Who Had Received a Single Dose of Menactra® Vaccine

NCT00862277

COMPLETED Phase 2

Safety and Immunogenicity Study of ChimeriVax West Nile Vaccine in Healthy Adults

NCT00746798

COMPLETED Phase 2

Influenza Vaccine Revaccination in Ambulatory Elderly Subjects

NCT00775450

COMPLETED Phase 3

Study of Fluzone Vaccine Administered by Intradermal Route in Comparison With Standard Fluzone® in Adults

NCT00772109

COMPLETED

Database Surveillance Safety Study of PENTACEL® Vaccine

NCT00804284

COMPLETED Phase 4

Annual Study for Serum Collection for Immunogenicity and Safety Evaluation in Healthy Children Receiving Fluzone®

NCT00755274

COMPLETED Phase 4

A Study to Evaluate the Safety and Immune Responses to Fluzone® Vaccination

NCT00743275

COMPLETED Phase 2

Dose Comparison Study of Menactra® in US Children

NCT00700635

COMPLETED Phase 2

Antibody Persistence and Booster Dose Response in Subjects Who Received Menactra® Three Years Earlier in Study MTA26

NCT00700713

TERMINATED Phase 2

Study of a Multi-Antigen Therapeutic Vaccine in Patients With Metastatic Melanoma

NCT00613509

COMPLETED Phase 2

Study to Determine a Preference for Fluzone Vaccine Given Intradermally (ID) and Intramuscularly (IM) in Healthy Adults

NCT00623181

COMPLETED Phase 1

Exploratory Trial to Evaluate the Safety and Immunogenicity of Menactra® and Menomune® Vaccines in Subjects ≥ 56 Years

NCT00874549

COMPLETED Phase 4

Phase IV Trial to Collect Safety Data and Sera for Immunogenicity Testing in Healthy Children Given Fluzone® Vaccine

NCT00561002

COMPLETED Phase 2

Trial to Describe the Safety and Immunogenicity of Fluzone®

NCT00524940

COMPLETED Phase 3

Study of the Safety of Menactra® Vaccine When Administered With Other Pediatric Vaccines to Healthy Toddlers

NCT00483574

COMPLETED Phase 3

Safety and Immunogenicity of Tdap Vaccine Compared to DTaP Vaccine in Children 4 to 6 Years of Age

NCT00467519

COMPLETED Phase 3

Immunogenicity and Safety of Pediatric Vaccines When Administered With Menactra® in Healthy Toddlers

NCT00422292

COMPLETED Phase 4

Safety and Immunogenicity of Fluzone® Vaccine in Children Who Received 2 Doses of the 2005-2006 Fluzone Formulation.

NCT00390884

COMPLETED Phase 4

Phase IV Trial to Determine the Safety and Immunogenicity of the WHO Formulation of the 2006-2007 Fluzone® Vaccine

NCT00389532

COMPLETED Phase 4

Trial to Collect Safety Data and Sera for Immunogenicity Testing

NCT00389857

COMPLETED Phase 3

Immunogenicity of High-dose Inactivated, Split-virion Influenza Vaccine Versus Standard Fluzone Vaccine in the Elderly

NCT00391053

TERMINATED Phase 1

Safety Study of MVA Smallpox Vaccine in HIV-positive Subjects Who Are Vaccinia Naive

NCT00282581

COMPLETED Phase 3

A Study of 2 Doses of Menactra®, a Meningococcal Conjugate Vaccine in Healthy Toddlers

NCT00384397

COMPLETED Phase 4

Descriptive, Open-label, Multicenter Study of the Safety of Redosing With ADACEL® Vaccine

NCT00347958

COMPLETED

Descriptive, Post-marketing, Passive Surveillance Safety Study of ADACEL™ Vaccine

NCT00258882

COMPLETED Phase 2

Persistence of Antibodies in Children Aged 7 to 15 Years Who Previously Received One Dose of Menactra® or Menomune®

NCT00258856

COMPLETED Phase 2

Safety and Immunogenicity of ChimeriVax-WN02 West Nile Vaccine in Healthy Adults

NCT00442169

COMPLETED Phase 2

Persistence of Antibodies in Adolescents and Adults 15 to 23 Years Who Received One Dose of Menactra® or Menomune®

NCT00269477

COMPLETED Phase 3

Safety and Immune Response of Different Pediatric Combination Vaccines.

NCT00255047

COMPLETED Phase 3

Evaluation of Responses to Fluzone® in Infants ≥ 6 Months of Age Who Did or Did Not Receive Fluzone® at 2 Months of Age

NCT00885105

COMPLETED Phase 4

Phase IV Trial to Collect Safety Data and Sera in Healthy Children Given Fluzone Vaccine

NCT00258817

COMPLETED Phase 4

Safety and Immunogenicity of the 2005-2006 Fluzone® Vaccine

NCT00258830

COMPLETED

36-Month Post-marketing Surveillance and Analysis of Menactra Vaccine in 2-10 Year Olds

NCT00728260

COMPLETED

Descriptive, Post-marketing, Surveillance Safety Study of Menactra Vaccine

NCT00254995

COMPLETED Phase 1

Safety and Immunogenicity Testing of Influenza Vaccine in Healthy Children 2 Months and 6 Months of Age

NCT00858468

COMPLETED Phase 4

Study of Menactra® in US Adolescents When Administered Concomitantly With Tdap Vaccine

NCT00777257

COMPLETED Phase 3

Safety and Immunogenicity of DAPTACEL® as 5th Dose in Children 4 to 6 Years Old After 4 Doses of Pentacel™ or DAPTACEL®

NCT00258895

COMPLETED Phase 2

Study of a Tetravalent Meningococcal Diphtheria Toxoid Conjugate Vaccine in Toddlers 9 to 18 Months of Age

NCT00643916

COMPLETED Phase 4

Study of Safety and Immunogenicity of Fluzone® in Healthy Children

NCT00831675

COMPLETED Phase 4

Safety and Immunogenicity of the World Health Organization (WHO) Formulation of the 2004-2005 Fluzone® Vaccine

NCT00831987

COMPLETED Phase 4

Canadian Manufactured Tetanus and Diphtheria Toxoids Adsorbed (Td) Vaccine Compared With U.S. Manufactured Td

NCT00601835

COMPLETED Phase 1

Safety, Tolerability, and Immune Response of ACAM3000 Modified Vaccinia Ankara (MVA) Smallpox Vaccine in Adults

NCT00079820

COMPLETED Phase 4

Study of DAPTACEL® Administered as a 5th Dose in 4 to 6-Year-Old Children Previously Immunized With PENTACEL™

NCT00802867

COMPLETED Phase 2

Study of a Booster Dose of Meningococcal Diphtheria Toxoid Conjugate Vaccine in Adolescents

NCT00777790

COMPLETED Phase 4

Study to Collect Sera for Immunogenicity Testing in Children Vaccinated With Fluzone®

NCT00836953

COMPLETED Phase 4

A Study to Evaluate the Safety and Immune Responses to Fluzone® Vaccination

NCT00835926

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Phase Distribution

PhaseTrial count
Phase 1 31
Phase 2 36
Phase 3 33
Phase 4 38

What is open in the Sanofi Pasteur, a Sanofi Company pipeline

3 recruiting of 153 indexed (2% open); 132 completed (86%).

Phase mix: 71 late (III/IV) vs 67 early (I/II) (balanced across stages).

Top condition: Influenza (16 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.

Sanofi Pasteur, a Sanofi Company: open-pipeline peers nationwide

Peers matched on 153 registered trials and 2% open enrollment, not the therapeutic-area sidebar.

Sanofi Pasteur, a Sanofi Company sits at or above the median trial volume and at or above 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 050100150200 0%5%10%15%20%25% Total trials Recruiting share Sanofi Pasteur, a Sanofi CompanyGynecologic Oncology GroupUniversity of South CarolinaGalderma R&DPfizer's Upjohn has merged with Mylan to form ViatrisPTC TherapeuticsSpectrum PharmaceuticalsCarelon ResearchSociété des Produits Nestlé (SPN)
Sanofi Pasteur, a Sanofi Company sits at or above the median trial volume and at or above the median recruiting share among these 9 nationwide peers -- the two do not always move together. Source: ClinicalTrials.gov (2026-08-08 snapshot).

Sanofi Pasteur, a Sanofi Company sits at or above the median trial volume and at or above the median recruiting share among these 9 nationwide peers -- the two do not always move together.

Sponsors near 153 trials (± recruiting share)

Sponsors near 2% open enrollment (± trial volume)

What to do with this Sanofi Pasteur, a Sanofi Company page

153 registered trials is a research-attention snapshot, not an endorsement of Sanofi Pasteur, a Sanofi Company or any single study.

  • 3 of Sanofi Pasteur, a Sanofi Company's trials are currently recruiting, check each one's own eligibility criteria before contacting a site. Browse recruiting trials
  • Influenza is the condition Sanofi Pasteur, a Sanofi Company studies most, compare against other sponsors active in the same condition before evaluating a specific study. See Influenza 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. Sanofi Pasteur, a Sanofi Company pipeline card: 153 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.