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 2 of 4

COMPLETED

Surveillance Study to Assess the Safety of Flublok Quadrivalent (Influenza Vaccine) in Pregnant Women and Their Offspring

NCT04460781

COMPLETED Phase 3

Safety of a Quadrivalent Meningococcal Conjugate Vaccine Administered Concomitantly With Routine Pediatric Vaccines in Healthy Infants and Toddlers

NCT03673462

COMPLETED Phase 4

Safety and Immunogenicity of Fluzone® Quadrivalent, Flublok® Quadrivalent, and Fluzone® High-Dose, Influenza Vaccines, 2018-2019 Formulations

NCT03617523

COMPLETED Phase 3

Immunogenicity and Safety of a Quadrivalent Meningococcal Conjugate Vaccine When Administered Concomitantly With Routine Pediatric Vaccines in Healthy Infants and Toddlers in the US

NCT03537508

COMPLETED Phase 4

Safety and Immunogenicity of Fluzone® Quadrivalent and Fluzone® High-Dose, Influenza Vaccines

NCT03308825

COMPLETED Phase 3

Safety and Immunogenicity of High-Dose Quadrivalent Influenza Vaccine in Participants ≥65 Years in the US

NCT03282240

COMPLETED Phase 2

Immunogenicity and Safety of a Purified Vero Rabies Vaccine

NCT03145766

COMPLETED Phase 3

Study of an Investigational Quadrivalent Meningococcal Conjugate Vaccine Administered in Children Aged 2 to 9 Years

NCT03077438

COMPLETED Phase 4

Safety and Immunogenicity of Fluzone® Quadrivalent Vaccine Administered to Healthy Children

NCT02915302

COMPLETED Phase 4

Safety and Immunogenicity of Fluzone® Quadrivalent and Fluzone® High-Dose, Influenza Vaccines, 2016-2017 Formulations

NCT02908269

COMPLETED Phase 3

Immune Lot Consistency, Immunogenicity, and Safety of an Investigational Quadrivalent Meningococcal Conjugate Vaccine

NCT02842853

COMPLETED Phase 3

Immunogenicity and Safety of an Investigational Quadrivalent Meningococcal Conjugate Vaccine in Adults 56 Years and Older

NCT02842866

COMPLETED Phase 3

Immunogenicity and Safety of a Booster Dose of an Investigational Quadrivalent Meningococcal Conjugate Vaccine

NCT02752906

COMPLETED Phase 4

Persistence of Bactericidal Antibodies in Adults Who Received a Booster Dose of Menactra® Approximately 4 Years Earlier

NCT02633787

COMPLETED Phase 1

Study of Tetanus Toxoid, Reduced Diphtheria Toxoid, and Acellular Pertussis Vaccine Adsorbed in Healthy Subjects

NCT02587520

COMPLETED

Sanofi Pasteur Quadrivalent Intradermal Influenza Vaccine Pregnancy Registry

NCT02554409

COMPLETED Phase 4

Study of Fluzone® Quadrivalent, Fluzone® Intradermal Quadrivalent, and Fluzone® High-Dose, Influenza Vaccines in Adults

NCT02563093

COMPLETED Phase 2

A Study of the Safety and Immunogenicity of High-Dose Quadrivalent Influenza Vaccine in Subjects Aged 65 Years and Older

NCT02553343

COMPLETED Phase 4

Safety and Immunogenicity of the 2015-2016 Formulation of Fluzone® Quadrivalent (Influenza Vaccine) Among Healthy Children

NCT02539108

COMPLETED Phase 4

Study of Fluzone® Quadrivalent, Fluzone® Intradermal, and Fluzone® High-Dose, Influenza Vaccines in Adults

NCT02258334

COMPLETED Phase 4

Safety and Immunogenicity Among Healthy Children Receiving Fluzone® Quadrivalent, Influenza Vaccine

NCT02222870

COMPLETED Phase 2

Immunogenicity and Safety of an Investigational Quadrivalent Meningococcal Conjugate Vaccine in Healthy Adolescents

NCT02199691

COMPLETED Phase 2

Immunologic Mechanisms of Immune Interference and/or Cross-Neutralizing Immunity After CYD Tetravalent Dengue Vaccine

NCT01943825

COMPLETED Phase 4

Safety and Immunogenicity Among Healthy Children Receiving Fluzone® Quadrivalent Influenza Virus Vaccine

NCT01946425

COMPLETED Phase 4

Study of Fluzone® Quadrivalent, Fluzone® Intradermal, and Fluzone® High-Dose Influenza Virus Vaccines in Adults

NCT01946438

COMPLETED

Sanofi Pasteur Quadrivalent Influenza Vaccine (QIV) Pregnancy Registry

NCT01945424

TERMINATED Phase 3

Study of a Candidate Clostridium Difficile Toxoid Vaccine in Subjects at Risk for C. Difficile Infection

NCT01887912

COMPLETED Phase 2

Study of Purified Vero Rabies Vaccine and Rabies Human Diploid Cell Vaccine in a Simulated Rabies Post-exposure Regimen

NCT01877395

COMPLETED Phase 2

Comparison of Purified Vero Rabies Vaccine, Serum Free With Human Diploid Cell Vaccine in Pre-exposure Use

NCT01784874

COMPLETED Phase 2

Study of a Quadrivalent Meningococcal Conjugate Vaccine in Subjects Aged 56 and Older

NCT01732627

COMPLETED Phase 3

Study of Intradermal Quadrivalent Influenza Vaccine in Adults Aged 18 Through 64 Years

NCT01712984

COMPLETED Phase 4

Study of Fluzone® Influenza Virus Vaccines 2012-2013 Formulation Among Adults.

NCT01691339

COMPLETED Phase 4

Safety and Immunogenicity Among Healthy Children Receiving Fluzone® Influenza Virus Vaccine (2012-2013 Formulation)

NCT01691326

COMPLETED Phase 4

Study of Menactra® in Healthy Subjects at 9 Months and Concomitantly With Pentacel® at 15 to 18 Months of Age

NCT01659996

COMPLETED Phase 4

Immunogenicity of Adacel® and BOOSTRIX® Vaccines in Adolescents

NCT01629589

COMPLETED Phase 2

Immune Response to Different Schedules of a Tetravalent Dengue Vaccine Given With or Without Yellow Fever Vaccine

NCT01488890

COMPLETED Phase 4

Safety and Immunogenicity in Adults of Revaccination With Adacel® Vaccine 10 Years After a Previous Dose

NCT01439165

COMPLETED Phase 4

Study of Fluzone® Influenza Virus Vaccine 2011-2012 Formulation (Intramuscular Route) Among Adults

NCT01430819

COMPLETED Phase 2

Study of a Single Dose of Menactra® Vaccine 4-6 Years After Prior Menactra Vaccine

NCT01442675

COMPLETED Phase 4

A Study of Fluzone® High-Dose Vaccine Compared With Fluzone® Vaccine In Elderly Adults

NCT01427309

COMPLETED

Post-licensure Safety Surveillance Study of Menactra Vaccine When Administered As a 2-dose Schedule to Children

NCT01689155

COMPLETED Phase 3

Study of DTap-IPV Compared to DAPTACEL® and IPOL® as the 5th Dose in Children 4 to 6 Years of Age

NCT01346293

COMPLETED Phase 3

Study of Quadrivalent Influenza Vaccine Among Children

NCT01240746

COMPLETED Phase 2

A Study of High-Dose Trivalent Inactivated Influenza Vaccine in Adults 50 to 64 Years of Age

NCT01258595

COMPLETED Phase 2

Study of Different Formulations of a Clostridium Difficile Toxoid Vaccine Given at Three Different Schedules in Adults

NCT01230957

COMPLETED Phase 3

Study of Quadrivalent Influenza Vaccine Among Adults

NCT01218646

COMPLETED

Rates of Pertussis Disease Among Persons Receiving Pentacel® or Other Pertussis Vaccines

NCT01129362

COMPLETED Phase 2

A Study of a Quadrivalent Meningococcal Tetanus Protein Conjugate Vaccine in Infants and Toddlers

NCT01049035

COMPLETED Phase 2

A Study of Influenza Virus Vaccines in Children and Adults

NCT00988143

COMPLETED Phase 2

Study of Influenza Vaccine Revaccination in Healthy Adults Previously Vaccinated With Fluzone ID or Fluzone IM

NCT01011049

← Previous Page 2 of 4 Next →

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.