Study to Assess the Efficacy and Safety of IMVT-1402 in Participants With Mild to Severe Generalized Myasthenia Gravis

Inclusion Criteria:

• Participants with the ability to understand the requirements of the trial, providewritten informed consent, and comply with the trial protocol procedures.

• Have mild to severe gMG by Myasthenia Gravis Foundation of America (MGFA)classification of Class II, III, or IVa at the Screening Visit

• Have an MG activities of daily living (MG-ADL) score of ≥ 6 at the Screening Visitand Baseline Visit (Day 1)

Additional inclusion criteria are defined in the protocol.

Exclusion Criteria:

• Have experienced myasthenic crisis within 12 weeks prior to the Screening Visit.

• Have had a thymectomy performed < 6 months prior to the Screening Visit or have aplanned thymectomy during the study

• Have any active or untreated malignant thymoma

Additional exclusion criteria are defined in the protocol.