The primary objective of this study is to describe the efficacy of rocatinlimab in reducing asthma exacerbations.

Inclusion Criteria:

• Participants must be between the ages of 18 and 75.
• Asthma diagnosed by a physician for ≥ 12 months prior to the screening visit.
• Existing therapy with medium-dose to high doses of inhaled corticosteroids (ICS) (defined as > 250 µg fluticasone propionate or equivalent ICS) in combination with at least 1 additional controller medication (eg, LABA, leukotriene receptor antagonist [LTRA], LAMA, methylxanthine, oral corticosteroids up to a daily dose of 10 mg prednisone equivalent) for at least 90 days prior to the screening visit with a stable dose for at least 30 days prior to the screening visit.
• Documented history of ≥ 1 asthma exacerbation in the past year prior to the screening visit, with at least 1 exacerbation during treatment with medium-dose to high doses of ICS (> 250 μg fluticasone propionate or equivalent ICS).
• Morning pre-BD FEV1 ≥ 35% and ≤ 90% of predicted normal at the screening visit and day 1 pre-randomization visits.
• ACQ-6 score ≥ 1.5 at the day 1 pre randomization visit.

Exclusion Criteria:

• Asthma exacerbation that results in emergency treatment or hospitalization, or treatment with systemic steroids at any time from 30 days prior to the day 1 pre randomization visit.
• Any clinically important pulmonary disease other than asthma.
• Current smoker, including active vaping of any products and/or marijuana, or former smoker with cessation within 6 months of screening, or history of > 10 pack-years.
• Suspicion of, or confirmed, coronavirus disease 2019 (COVID-19) infection during the screening period including known history of COVID-19 infection within 4 weeks prior to Screening; mechanical ventilation or extracorporeal membrane oxygenation (ECMO) secondary to COVID-19 within 3 months prior to screening; participants with COVID-19 infection who have not yet sufficiently recovered to participate in the procedures of a clinical trial.
• Active chronic or acute infection requiring treatment with systemic antibiotics, antiviral, antiparasitic, antiprotozoal, or antifungals which has not completely resolved, or for which therapy has not been completed, within 4 weeks before day 1 pre-randomization visit.
• Positive or indeterminate QuantiFERON GOLD from central laboratory at screening.
• Active malignancy; multiple myeloma; myeloproliferative or lymphoproliferative disorder; or a history of any of these conditions within 5 years prior to informed consent
• History of major immunologic reaction to any other biologic product or any excipient of rocatinlimab.
• Diagnosis of a helminth parasitic infection within 6 months prior to day 1 pre-randomization visit that had not been treated with or had failed to respond to standard of care therapy.
• Evidence of human immunodeficiency virus (HIV) infection or positive for HIV antibodies at screening or current acquired, common variable or inherited, primary or secondary immunodeficiency.
• Active and non-virally suppressed hepatitis B infection at initial screening,
• Positive for hepatitis C virus (HCV) antibody at screening with confirmed positive HCV RNA.

De-identified individual patient data for variables necessary to address the specific research question in an approved data sharing request.

Data sharing requests relating to this study will be considered beginning 18 months after the study has ended and either 1) the product and indication have been granted marketing authorization in both the US and Europe or 2) clinical development for the product and/or indication discontinues and the data will not be submitted to regulatory authorities. There is no end date for eligibility to submit a data sharing request for this study.

Qualified researchers may submit a request containing the research objectives, the Amgen product(s) and Amgen study/studies in scope, endpoints/outcomes of interest, statistical analysis plan, data requirements, publication plan, and qualifications of the researcher(s). In general, Amgen does not grant external requests for individual patient data for the purpose of re-evaluating safety and efficacy issues already addressed in the product labelling. Requests are reviewed by a committee of internal advisors. If not approved, a Data Sharing Independent Review Panel will arbitrate and make the final decision. Upon approval, information necessary to address the research question will be provided under the terms of a data sharing agreement. This may include anonymized individual patient data and/or available supporting documents, containing fragments of analysis code where provided in analysis specifications. Further details are available at the URL below.