A Study of Nipocalimab in Adult Participants With Active Systemic Lupus Erythematosus

Prior treatment

• Has any unstable or progressive manifestation of SLE that is likely to warrant escalation in therapy beyond permitted background medications
• Has a severe infection including opportunistic infections requiring parenteral anti-infectives, and/or hospitalization within 8 weeks prior to screening
• Has received a single B-cell targeting agent within 3 months prior to first administration of study intervention

Other illness

• Confirmed or suspected inflammatory diseases that might confound the evaluations of efficacy

Lab values

• Current or history of, severe, progressive, or uncontrolled renal disease, with the exception of active lupus nephritis (LN). Have severe active LN as determined by sponsor (or designee) adjudication. Control of renal disease must be documented with at least 2 measurements of proteinuria or urine protein/creatinine ratio (UPCR) over the 6 months prior to screening

• Has a clinical diagnosis of systemic lupus erythematosus (SLE) greater than or equal to (\>=) 6 months prior to the screening visit and according to Systemic Lupus International Collaborating Clinics (SLICC)-2012 classification criteria: at least 4 criteria fulfilled, with at least 1 clinical criterion and 1 immunologic criterion
• Has at least 1 BILAG (british isles lupus assessment group) A and/or 2 BILAG B scores observed during screening
• Must have at least moderately active SLE, as defined as systemic lupus erythematosus disease activity index 2000 (SLEDAI-2K) score \>= 6 at screening visit. Must also have SLEDAI 2K \>= 4 for clinical features (that is, SLEDAI-2K score excluding headache and laboratory abnormalities) present at Week 0 prior to randomization
• Has a CLASI (cutaneous lupus erythematosus disease area and severity index) activity score of at least 6 (excluding diffuse non-inflammatory alopecia) or at least 4 joints with pain and signs of inflammation (active joints) at screening or at Week 0, or both
• At least 1 unequivocally positive autoantibody test including antinuclear antibodies (ANA) (\>= 1:80) and/or anti-double stranded deoxyribonucleic acid (dsDNA) antibodies (level \>= 75 international units/milliliter \[IU/mL\]) and/or anti-Smith antibodies (\>120 Absorbance unit/milliliter \[AU/mL\]) detected during screening
• Must be receiving 1 or more of the following protocol-permitted, systemic standard-of-care treatments prior to first administration of study intervention at a stable dose: oral glucocorticoids, antimalarial or up to 2 immunomodulatory drugs