A Study Comparing Anitocabtagene Autoleucel to Standard of Care Therapy in Participants With Relapsed/ Refractory Multiple Myeloma

Key Inclusion Criteria: * Documented historical diagnosis of multiple myeloma (MM) * Received 1 to 3 prior lines of antimyeloma therapy, including an immunomodulatory drug (IMiD) and an anti-cluster of differentiation 38 (CD38) monoclonal antibody (mAb). A minimum of 2 consecutive cycles of an IMiD and an anti-CD38 mAb in any prior line of therapy is required. The IMiD and anti-CD38 mAb do not need to be from the same regimen in the prior line(s) of therapy. * Documented evidence of progressive disease by IMWG criteria based on the investigator's determination on or within 12 months of the last dose of the last regimen * Measurable disease at screening per IMWG, defined as any of the following: * Serum M-protein level ≥ 0.5 g/dL or urine M-protein level ≥ 200 mg/24 hours; or * Light chain MM without measurable disease in the serum or urine: serum free light chain ≥ 10 mg/dL and abnormal serum free light chain ratio * Only individuals who are candidates to receive at least 1 of the 4 SOCT regimens (PVd, DPd, KDd, or Kd), as determined by the investigator, should be considered for this study * Eastern Cooperative Oncology Group (ECOG) performance status of 0 or 1 * Females of childbearing potential must have a negative serum or urine pregnancy test with a sensitivity of at least 25 mIU/mL (females who have undergone surgical sterilization or who have been postmenopausal for at least 2 years are not considered to be of childbearing potential) Key Exclusion Criteria: * Pr…