A Study of Nivolumab in Participants With Hepatocellular Carcinoma Who Are at High Risk of Recurrence After Curative Hepatic Resection or Ablation

Inclusion Criteria:

   - Participants with a first diagnosis of HCC who have undergone a curative resection or
   ablation

   - Participants are eligible to enroll if they have non-viral related-HCC, or if they
   have HBV-HCC, or HCV-HCC

   - Child-Pugh Score 5 or 6

   - Eastern Cooperative Oncology Group (ECOG) performance status (PS) 0 or 1

Exclusion Criteria:

   - Known fibrolamellar HCC, sarcomatoid HCC, or mixed cholangiocarcinoma and HCC

   - Any evidence of tumor metastasis or co-existing malignant disease

   - Participants previously receiving any prior therapy for HCC, including loco-regional
   therapies

   - Participants who have undergone a liver transplant or those who are in the waiting
   list for liver transplantation

   - Participants who have received a live/attenuated vaccine within 30 days of
   randomization (eg, varicella, zoster, yellow fever, rotavirus, oral polio and measles,
   mumps, rubella [MMR]).

Other protocol defined inclusion/exclusion criteria apply