| E.1 Medical condition or disease under investigation | 
| E.1.1 | Medical condition(s) being investigated  | 
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| E.1.1.1 | Medical condition in easily understood language  | 
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| E.1.1.2 | Therapeutic area  | Diseases [C] - Blood and lymphatic diseases [C15] | 
| MedDRA Classification | 
| E.1.2 Medical condition or disease under investigation | 
| E.1.2 | Version  | 20.0 | 
 
| E.1.2 | Level  | LLT | 
 
| E.1.2 | Classification code  | 10060612 | 
 
| E.1.2 | Term  | Hemophilia A | 
 
| E.1.2 | System Organ Class  | 100000004850 | 
 
 
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| E.1.3 | Condition being studied is a rare disease  |  Yes  | 
| E.2 Objective of the trial | 
| E.2.1 | Main objective of the trial  | 
| - To evaluate the safety of BIVV001 in previously treated pediatric subjects with hemophilia A | 
 
 
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| E.2.2 | Secondary objectives of the trial  | 
- To evaluate the efficacy of BIVV001 as a prophylaxis treatment
 - To evaluate the efficacy of BIVV001 in the treatment of bleeding episodes
 - To evaluate BIVV001 consumption for prevention and treatment of bleeding episodes
 - To evaluate the effect of BIVV001 prophylaxis on joint health outcomes
 - To evaluate the effect of BIVV001 prophylaxis on Quality of Life (QoL) outcomes
 - To evaluate the efficacy of BIVV001 for perioperative management
 - To evaluate the safety and tolerability of BIVV001 treatment
 - To assess the pharmacokinetics (PK) of BIVV001 
 
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| E.2.3 | Trial contains a sub-study  |  No  | 
| E.3 | Principal inclusion criteria  | 
- Participant must be younger than 12 years of age, at the time of signing the informed consent
 - Severe hemophilia A defined as <1 IU/dL (<1%) endogenous FVIII as documented either by central laboratory testing at Screening or in historical medical records from a clinical laboratory demonstrating <1% FVIII coagulant activity (FVIII:C) or a documented genotype known to produce severe hemophilia A.
 - Previous treatment for hemophilia A (prophylaxis or on-demand) with any recombinant and/or plasma-derived FVIII, or cryoprecipitate for at least 150 EDs for patients aged 6-11 years and above 50 EDs for patients aged <6 years
 - Weight above or equal to 10 kg.
 
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| E.4 | Principal exclusion criteria | 
- History of hypersensitivity or anaphylaxis associated with any FVIII product.
 - History of a positive inhibitor (to FVIII) test defined as ≥0.6 BU/mL, or any value greater than or equal to the lower sensitivity cut-off for laboratories with cut-offs for inhibitor detection between 0.7 and 1.0 BU/mL, or clinical signs or symptoms of decreased response to FVIII administrations. Family history of inhibitors will not exclude the participant.
 - Positive inhibitor test result, defined as ≥0.6 BU/mL at Screening.
 
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| E.5 End points | 
| E.5.1 | Primary end point(s) | 
| Occurrence of inhibitor development  | 
 
 
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| E.5.1.1 | Timepoint(s) of evaluation of this end point | 
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| E.5.2 | Secondary end point(s) | 
1 - Annualized bleeding rate (ABR)     
 2 - Annualized bleeding rate (ABR) by type of bleed
 3 - Annualized bleeding rate (ABR) by location of bleed
 4 - Percentage of participants who maintain FVIII activity above prespecified levels
 5 - Number of injection and dose of BIVV001 to treat a bleeding episode
 6 - Percentage of bleeding episodes treated with a single injection of BIVV001     
 7 - Assessment of response to BIVV001 treatment of individual bleeding episodes
 8 - Physician’s global assessment of the participant’s response based on BIVV001 treatment
 9 - Total annualized BIVV001 consumption
 10 - Annualized Joint Bleeding Rate (AJBR)
 11 - Target joint resolution 
 12 - Change in Hemophilia Joint Health Score (HJHS) total score and domain scores
 13 - Changes in Haemophilia Quality of Life Questionnaire for Children (Haemo-QoL) total score 
 14 - Changes in Haemophilia Quality of Life Questionnaire for Children (Haemo-QoL) physical health domain scores 
 15 - Investigators’ or Surgeons’ assessment of participant’s hemostatic response to BIVV001 treatment 
 16-- Number of injections and dose to maintain hemostasis during perioperative period for major surgery
 17 - Total BIVV001 consumption during perioperative period for major surgery
 18 - Number of blood component transfusions used during perioperative period for major surgery
 19 - Type of blood component transfusions used during perioperative period for major surgery
 20 - Estimated blood loss during perioperative period for major surgery 
 21 - Number of participants with  occurence of adverse events (AEs) and serious adverse events (SAEs)
 22 - Number of participants with occurrence of embolic and thrombotic events 
 23 - PK parameter: Maximum activity (Cmax)
 24 - PK parameter: Elimination half-life (t1/2)
 25 - PK parameter: Total clearance (CL)
 26 - PK parameter: Total clearance at steady state (CLss)
 27 - PK parameter:dose-normalized area under the activity-time curve (DNAUC)
 28 - PK parameter: Area under the activity time curve (AUC)
 29 - PK parameter: Volume of distribution at steady state (Vss)
 30 - PK parameter: Mean residence time (MRT)
 31 - PK parameter: Incremental recovery (IR)
 32 - PK parameter: Trough activity (Ctrough)
 33 - PK parameter: Time above predefined FVIII activity levels   
 
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| E.5.2.1 | Timepoint(s) of evaluation of this end point | 
1 to 6, 8 to 10 , 12 to 23, 31, 32 : Baseline to 52 weeks
 7 : 52 weeks
 11 : At week 52
 24 to 30, 33: Baseline (day 1)
 
 
 
 
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| E.6 and E.7 Scope of the trial | 
| E.6 | Scope of the trial | 
| E.6.1 | Diagnosis |  No  | 
| E.6.2 | Prophylaxis |  Yes  | 
| E.6.3 | Therapy |  Yes  | 
| E.6.4 | Safety |  Yes  | 
| E.6.5 | Efficacy |  Yes  | 
| E.6.6 | Pharmacokinetic |  Yes  | 
| E.6.7 | Pharmacodynamic |  Yes  | 
| E.6.8 | Bioequivalence |  No  | 
| E.6.9 | Dose response |  No  | 
| E.6.10 | Pharmacogenetic |  No  | 
| E.6.11 | Pharmacogenomic |  No  | 
| E.6.12 | Pharmacoeconomic |  No  | 
| E.6.13 | Others |  No  | 
| E.7 | Trial type and phase | 
| E.7.1 | Human pharmacology (Phase I) |  No  | 
| E.7.1.1 | First administration to humans |  No  | 
| E.7.1.2 | Bioequivalence study |  No  | 
| E.7.1.3 | Other |  No  | 
| E.7.1.3.1 | Other trial type description |  | 
| E.7.2 | Therapeutic exploratory (Phase II) |  No  | 
| E.7.3 | Therapeutic confirmatory (Phase III) |  Yes  | 
| E.7.4 | Therapeutic use (Phase IV) |  No  | 
| E.8 Design of the trial | 
| E.8.1 | Controlled |  No  | 
| E.8.1.1 | Randomised |  No  | 
| E.8.1.2 | Open |  Yes  | 
| E.8.1.3 | Single blind |  Information not present in EudraCT  | 
| E.8.1.4 | Double blind  |  Information not present in EudraCT  | 
| E.8.1.5 | Parallel group |  Information not present in EudraCT  | 
| E.8.1.6 | Cross over  |  Information not present in EudraCT  | 
| E.8.1.7 | Other |  Information not present in EudraCT  | 
| E.8.2 |  Comparator of controlled trial | 
| E.8.2.1 | Other medicinal product(s) |  Information not present in EudraCT  | 
| E.8.2.2 | Placebo  |  Information not present in EudraCT  | 
| E.8.2.3 | Other |  Information not present in EudraCT  | 
| E.8.3 | 
                                The trial involves single site in the Member State concerned
                             |  No  | 
| E.8.4 |  The trial involves multiple sites in the Member State concerned  |  Yes  | 
| E.8.4.1 | Number of sites anticipated in Member State concerned | 2 | 
| E.8.5 | The trial involves multiple Member States |  Yes  | 
| E.8.5.1 | Number of sites anticipated in the EEA | 19 | 
| E.8.6 Trial involving sites outside the EEA | 
| E.8.6.1 | Trial being conducted both within and outside the EEA |  Yes  | 
| E.8.6.2 | Trial being conducted completely outside of the EEA |  No  | 
| E.8.6.3 | If E.8.6.1 or E.8.6.2 are Yes, specify the regions in which trial sites are planned | 
| Australia | 
 
| Belgium | 
 
| Canada | 
 
| France | 
 
| Germany | 
 
| Hungary | 
 
| Ireland | 
 
| Italy | 
 
| Netherlands | 
 
| Spain | 
 
| Sweden | 
 
| Switzerland | 
 
| Taiwan | 
 
| Turkey | 
 
| United Kingdom | 
 
| United States | 
 
 
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| E.8.7 | Trial has a data monitoring committee |  Yes  | 
| E.8.8 | 
                        Definition of the end of the trial and justification where it is not the last
                        visit of the last subject undergoing the trial
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End of Study will occur when both of the following criteria have been met: 
 • At least 50 participants (25 subjects <6 years of age and 25 subjects 6 to <12 years of age) have reached 50 exposure days (EDs) and have completed a valid inhibitor test after the 50th ED.
 • 24 participants (12 subjects <6 years of age and 12 subjects 6 to <12 years of age) in the PK subgroup have completed the BIVV001 PK profile with adequate estimate of terminal t1/2.
 
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| E.8.9 Initial estimate of the duration of the trial | 
| E.8.9.1 | In the Member State concerned years | 1 | 
| E.8.9.1 | In the Member State concerned months | 9 | 
| E.8.9.1 | In the Member State concerned days |  | 
| E.8.9.2 | In all countries concerned by the trial years | 1 | 
| E.8.9.2 | In all countries concerned by the trial months | 9 | 
| E.8.9.2 | In all countries concerned by the trial days | 0 |