A Study of RVT-1401 in Myasthenia Gravis Patients

Inclusion Criteria:

1. Male or female ≥ 18 years of age.

2. Myasthenia Gravis Foundation of America (MGFA) Class II-IVa and likely not in need of
a respirator for the duration of the study as judged by the Investigator.

3. QMG score ≥12 at Screening and Baseline.

Other, more specific inclusion criteria are defined in the protocol.

Exclusion Criteria:

1. Use of rituximab, belimumab, eculizumab or any monoclonal antibody for
immunomodulation within 6 months prior to first dosing.

2. Immunoglobulins given by SC, IV (IVIG), or intramuscular route, or
plasmapheresis/plasma exchange (PE) within 4 weeks before Screening.

3. Thymectomy performed < 12 months prior to screening.

4. Total IgG level <6 g/L (at screening).

5. Absolute neutrophil count <1500 cells/mm3(at screening).

Other, more specific exclusion criteria are defined in the protocol