A Study of Nipocalimab in Adult Participants With Active Lupus Nephritis

Inclusion Criteria: * Kidney biopsy documentation of International Society of Nephrology (ISN)/Renal Pathology Society (RPS) proliferative nephritis: Class III or IV (with or without concomitant Class V) within the last 6 months prior to screening or performed during screening * Urine Protein to Creatinine Ratio (UPCR) greater than or equal to (\>=) 1.0 milligram/milligram (mg/mg) measured twice during screening * Currently receiving prednisone equivalent dose of 1 milligram/kilogram/day (mg/kg/day) or less than or equal to (\<=) 60 mg/day whichever is lower, or less. Must be receiving prednisone equivalent of 10 mg/day or more at screening and randomization. Treated for \>= 6 weeks with stable dosing \>= 2 weeks prior to first administration of study intervention * If receiving angiotensin-converting enzyme (ACE) inhibitor/angiotensin II receptor blockers (ARB), a stable dose for at least 2 weeks prior to first administration of study intervention * Is recommended to be up-to-date on all age-appropriate vaccinations prior to screening per routine local medical guidelines. For study participants who received locally-approved (and including emergency use-authorized) coronavirus disease 2019 (COVID-19) vaccines recently prior to study entry, follow applicable local vaccine labelling, guidelines, and standards-of-care for patients receiving immune-targeted therapy when determining an appropriate interval between vaccination and study enrolment Exclusion Criteria: * Comorbidit…