The main purpose of this study is to assess the bioequivalence of ocrelizumab SC test formulation to the marketed ocrelizumab SC reference formulation in participants with either relapsing multiple sclerosis (RMS) or primary progressive multiple sclerosis (PPMS). The study consists of 2 phases: a controlled phase, where participants in each group will receive one dose of test or reference formulation and a continuation phase, where all participants in both groups will receive ocrelizumab SC test formulation.
Diagnosis of RMS or PPMS according to the revised McDonald 2017 criteria (Thompson et al. 2018) or the most current McDonald criteria at the time of study start
Expanded Disability Status Scale (EDSS) score, 0-6.5, inclusive, at screening
Participants who have previously received anti-cluster of differentiation (CD) 20s (including ocrelizumab) less than 2 years before screening
Participants who have previously received anti-CD20s (including ocrelizumab) more than 2 years before screening if one of the following conditions is met: B-cell count is below lower limit of normal (LLN), or the discontinuation of the treatment was due to safety reasons
History of confirmed or suspected progressive multifocal leukoencephalopathy (PML)
History of cancer, including hematologic malignancy and solid tumors, within 10 years of screening