Seqirus

25 total trials 24 completed

Seqirus sponsors 25 registered US clinical trials on ClinicalTrials.gov, none currently recruiting, and 24 completed. 14 of these trials are in Phase 3-4 (later-stage) and 9 in Phase 1-2 (earlier-stage). The most-studied condition in this pipeline is Influenza, Human, with 4 trials.

Trial Pipeline

25 total, page 1 of 1

ACTIVE NOT RECRUITING Phase 3

A Clinical Study to Evaluate the Efficacy, Safety and Immunogenicity of an Adjuvanted Influenza Vaccine Compared to a Non-adjuvanted Influenza Vaccine in Adults ≥65 Years of Age

NCT06087640

COMPLETED Phase 3

The Celljuvant Study: A Phase 3 Immunogenicity and Safety Study of aQIVc Vaccine in Adults Aged 50 Years and Older

NCT06015282

COMPLETED Phase 1

Study to Evaluate Immunogenicity, Safety and Tolerability of Adjuvanted and Non-Adjuvanted H2N3 Influenza Vaccines in Adults

NCT05875961

COMPLETED Phase 2

Study to Evaluate Safety and Immunogenicity of Different Priming and Booster Regimens With Adjuvanted H5N8 and/or H5N6 Influenza Vaccine in Adults

NCT05874713

COMPLETED Phase 2

Safety and Immunogenicity of Different Formulations of an MF59-Adjuvanted Influenza Vaccine in Older Adults ≥50 Years of Age

NCT05501561

COMPLETED Phase 2

A Study to Evaluate Safety and Immunogenicity of One or Two Booster Vaccinations With H5N6 Influenza Vaccine in Adults Primed With H5N1 Influenza Vaccine or Unprimed

NCT05422326

COMPLETED Phase 3

A Clinical Study to Evaluate the Immunogenicity and Safety of an Adjuvanted Quadrivalent Influenza Vaccine Compared With a Licensed Quadrivalent Vaccine in Adults 50 to 64 Years of Age

NCT05044195

COMPLETED Phase 2

Safety and Immunogenicity of an MF59-Adjuvanted Influenza Vaccine in Older Adults

NCT04576702

COMPLETED Phase 3

Safety and Immunogenicity Study of QIVc in Healthy Pediatric Subjects

NCT04074928

COMPLETED Phase 3

Phase 3 Safety and Immunogenicity Study of aQIV in Elderly Adults

NCT03314662

COMPLETED

Afluria Pregnancy Registry

NCT03442582

COMPLETED

Flucelvax (TIVc or QIVc) Pregnancy Registry

NCT03438487

COMPLETED Phase 3

A Study to Evaluate the Immunogenicity and Safety of Seqirus Quadrivalent Influenza Vaccine (QIV) in a Pediatric Population 6 Months Through 59 Months of Age.

NCT02914275

COMPLETED Phase 3

A Study to Evaluate Safety, Immunogenicity, and Lot-to-Lot Consistency of H5N1 Subunit Influenza Virus Vaccine in Healthy Adult Subjects ≥18 Years of Age

NCT02839330

COMPLETED Phase 3

A Study to Evaluate the Immunogenicity and Safety of Seqirus Quadrivalent Influenza Vaccine (QIV) in a Pediatric Population 5 Through 17 Years of Age

NCT02545543

COMPLETED Phase 3

Clinical Study to Evaluate Safety, Immunogenicity of Investigational Flu Vaccine Compared to an Approved Flu Vaccine (QIV) in Children Previously Vaccinated in Trial V118_05

NCT02255409

COMPLETED Phase 4

A Study to Evaluate the Safety and Tolerability of Trivalent Influenza Virus Vaccine in Children Aged 5 Years to < 9 Years

NCT02212106

COMPLETED Phase 3

A Study to Evaluate the Immunogenicity and Safety of bioCSL Quadrivalent Influenza Vaccine (QIV) in Adults Aged 18 Years and Above.

NCT02214225

COMPLETED Phase 1

Safety and Immunogenicity of a Four Influenza Vaccines in Children Ages 6 Months Old to Less Than 48 Months Old

NCT02035696

COMPLETED Phase 3

Clinical Study to Evaluate the Safety, Immunogenicity and Efficacy of Investigational Flu Vaccine Compared to Approved Flu Vaccine in Children.

NCT01964989

COMPLETED Phase 3

A Study to Determine the Immunogenicity and Safety Profile of CSL Limited's Influenza Virus Vaccine Compared to a US Licensed Comparator Influenza Virus Vaccine in a Pediatric Population

NCT00959049

COMPLETED Phase 2

A Clinical Trial of CSL's 2009 H1N1 Influenza Vaccine (CSL425) in Healthy Adults in the USA

NCT00958126

COMPLETED Phase 2

A Clinical Trial of CSL's 2009 H1N1 Influenza Vaccine (CSL425) in a Healthy Pediatric Population in the USA

NCT00958243

COMPLETED Phase 1

Dose Ranging Study to Evaluate Immunogenicity and Safety of Adjuvanted or Non-adjuvanted Cell Culture-derived H5N1 Influenza Vaccine in Young Adults (18-40 Years Old)

NCT00812019

COMPLETED Phase 4

A Study to Determine the Immunogenicity and Safety Profile of CSL Limited's Influenza Virus Vaccine Compared to a US Licensed Comparator Influenza Virus Vaccine

NCT00735475

Phase Distribution

PhaseTrial count
Phase 1 3
Phase 2 6
Phase 3 12
Phase 4 2

Therapeutic Areas

What the Pipeline for Seqirus Shows

According to the ClinicalTrials.gov registry, Seqirus is linked to 25 US clinical trials across every stage of research activity. Of those, 0 studies are currently recruiting, about 0% of the sponsor's indexed portfolio, and 24 are already marked complete, representing roughly 96% of the total.

The phase mix for Seqirus reports 14 late-stage studies (Phase 3 and Phase 4 combined) and 9 earlier-phase studies (Phase 1 and Phase 2).

The top therapeutic focus area indexed for Seqirus is Influenza, Human with 4 linked trials, and 0 other condition areas appear in the top list above.

How to read these pipeline numbers

Recruiting share is one of the more practical signals here: it reflects how much of a sponsor's research is presently open to new participants, while the completed share indicates the depth of finished work that has already contributed registry results. Both counts come directly from the public ClinicalTrials.gov dataset and are refreshed on the registry side; this page mirrors the latest data pull without altering it.

A portfolio weighted toward Phase 3 usually reflects an organization advancing candidates toward regulatory review, where the research centers on comparative efficacy and broader safety across larger populations. A heavier Phase 1 and Phase 2 tilt generally indicates exploratory work, safety, dosing, and early signal detection, and is common among research-forward sponsors that seed many early programs. Phase 4 entries, when present, track interventions already in real-world use and typically focus on long-term safety, effectiveness across subgroups, or formulation comparisons.

That distribution is a quick read of where the organization concentrates its research attention; it does not imply product availability, market share, or any clinical endorsement. All numbers on this page come from ClinicalTrials.gov maintained by the National Library of Medicine, and counts can shift as new studies are registered or existing ones update their status. This information is provided for reference and educational purposes only, not as medical, investment, or regulatory advice, verify current details directly with ClinicalTrials.gov before relying on any figure here.

Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainTrial Editorial

Every figure on PlainTrial is rendered directly from the ClinicalTrials.gov registry, no number is typed in by an editor. This page aggregates every registered trial from this sponsor, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.