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An Open-label, Parallel, Phase 3, Two-arm Study to Investigate the Efficacy and Safety of Fitusiran Prophylaxis in Male Participants Aged 1 to Less Than 12 Years With Hemophilia A or B With or Without Inhibitory Antibodies to Factors VIII or IX

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Trial Profile

An Open-label, Parallel, Phase 3, Two-arm Study to Investigate the Efficacy and Safety of Fitusiran Prophylaxis in Male Participants Aged 1 to Less Than 12 Years With Hemophilia A or B With or Without Inhibitory Antibodies to Factors VIII or IX

Status: Recruiting
Phase of Trial: Phase III

Latest Information Update: 27 Feb 2026

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At a glance

  • Drugs Fitusiran (Primary) ; Antithrombins
  • Indications Haemophilia A; Haemophilia B
  • Focus Registrational; Therapeutic Use
  • Acronyms ATLAS-KIDS
  • Sponsors Sanofi

Most Recent Events

  • 20 Jan 2026 Status changed from not yet recruiting to recruiting.
  • 23 Dec 2025 Planned number of patients changed to 85.
  • 23 Dec 2025 New trial record

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