A Study to Evaluate the Safety and Efficacy of Obinutuzumab Compared With Placebo in Participants With Lupus Nephritis (LN)

Open to people ages 18-75

• Diagnosis of Systemic Lupus Erythematosus (SLE), according to current American College of Rheumatology (ACR) criteria
• Diagnosis of International Society of Nephrology/Renal Pathology Society (ISN/RPS) 2003 Class III or IV LN as evidenced by renal biopsy performed within 6 months prior to or during screening. Participants may co-exhibit Class V disease in addition to either Class III or Class IV disease
• Proteinuria (urine protein to creatinine ratio) greater than (>) 1.0
• For women who are not postmenopausal (greater than or equal to [>/=] 12 months of non-therapy-induced amenorrhea) or surgically sterile (absence of ovaries and/or uterus): agreement to remain abstinent or use two adequate methods of contraception, including at least one method with a failure rate of less than (<) 1 percent (%) per year, during the treatment period and for at least 18 months after the last dose of study drug
• For men: agreement to remain abstinent or use a condom plus an additional contraceptive method that together result in a failure rate of <1% per year during the treatment period and for at least 12 months after the last dose of study drug and agreement to refrain from donating sperm during this same period

• Retinitis, poorly controlled seizure disorder, acute confusional state, myelitis, stroke or stroke syndrome, cerebellar ataxia, or dementia that is currently active and resulting from SLE
• Presence of rapidly progressive glomerulonephritis
• Severe renal impairment as defined by estimated Glomerular Filtration Rate (GFR) <30 milliliters per minute (mL/min) or the need for dialysis or renal transplant
• Greater than 50% of glomeruli with sclerosis on renal biopsy
• Treatment with cyclophosphamide or calcineurin inhibitors within the 3 months prior to randomization
• Unstable disease with thrombocytopenia or at high risk for developing clinically significant bleeding or organ dysfunction requiring therapies such as plasmapheresis or acute blood or platelet transfusions
• History of severe allergic or anaphylactic reactions to monoclonal antibodies or known hypersensitivity to any component of the obinutuzumab infusion
• Significant or uncontrolled medical disease in any organ system not related to SLE or LN, which, in the investigator's opinion, would preclude participant participation
• Concomitant chronic conditions, excluding SLE, (e.g., asthma, Crohn's disease) that required oral or systemic steroid use in the 52 weeks prior to screening
• Previous treatment with an anti-cluster of differentiation (CD20)-targeted therapy within 12 months
• Previous treatment with a biologic B-cell-targeted therapy (other than anti-CD20) within 6 months of randomization
• Known intolerance to MMF or MPA