Key Inclusion Criteria:

* Histologically confirmed large B-cell lymphoma
* Chemotherapy-refractory disease, defined as one or more of the following:

* No response to first-line therapy (primary refractory disease)
* No response to second or greater lines of therapy OR
* Refractory after autologous stem cell transplant (ASCT)
* At least 1 measureable lesion according to the Lugano Classification (Cheson 2014).
* Individuals must have received adequate prior therapy, including at a minimum:

* Anti-CD20 monoclonal antibody
* An anthracycline-containing chemotherapy regimen
* Eastern Cooperative Oncology Group (ECOG) performance status of 0 or 1
* Adequate renal, hepatic, pulmonary, and cardiac function

Key Exclusion Criteria:

* Known CD19 negative or CD20 negative tumor
* History of Richter's transformation of Chronic Lymphocytic Leukemia (CLL)
* Prior CAR therapy or other genetically modified T-cell therapy
* Prior organ transplantation including prior allogeneic stem cell transplant (SCT)
* Prior CD19 targeted therapy
* Clinically significant infection or cardiopulmonary disease
* Presence of any in-dwelling lines or drains (dedicated central venous access catheters allowed)
* History or presence of central nervous system (CNS) lymphoma or nonmalignant CNS disorder or cerebrospinal fluid (CSF) malignant cells or brain metastases
* History of autoimmune disease
* History of deep vein thrombosis (DVT) or pulmonary embolism (PE) within the last 6 months

Note: Other protocol defined Inclusion/Exclusion criteria may apply.