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