The purpose of this expanded access program (EAP) is to provide access to apitegromab for eligible patients with spinal muscular atrophy (SMA) prior to approval by the local regulatory agency . A medical doctor must decide whether the potential benefit outweighs the risk of receiving an investigational therapy based on the individual patient's medical history and program eligibility criteria.

Inclusion Criteria:

1. ≥2 years of age.
2. Documented diagnosis of 5q SMA.

Exclusion Criteria:

1. Previous history of a hypersensitivity reaction to a monoclonal antibody or recombinant protein bearing an Fc domain (eg, a soluble receptor-Fc fusion protein), apitegromab, or excipients of apitegromab.
2. Enrolled in a clinical study for any investigational drug.
3. Pregnant or breastfeeding.