Study on the Effectiveness and Safety of the Combination of the Two Drugs Regorafenib and Nivolumab in Patients With Colorectal Cancer (Cancer of the Colon or Rectum Classified as Proficient Mismatch Repair and Microsatellite Stable)

Inclusion Criteria:

• Histological or cytological confirmed advanced, metastatic, or progressive pMMR/MSSadenocarcinoma of colon or rectum
• Participant must have progressed or be intolerant to prior systemic chemotherapyincluding fluoropyrimidines, irinotecan, oxaliplatin, anti-vascular endothelial growthfactor (VEGF) therapy, and, if extended rat sarcoma viral oncogene homolog (RAS) wildtype, an anti-epidermal growth factor receptor (EGFR) therapy. Exceptions may apply
• Participants must have adequate organ and marrow function defined byprotocol-specified laboratory tests
• Eastern Cooperative Oncology Group (ECOG) performance status of 0 to 1
• Measurable disease as determined by response evaluation criteria in solid tumors (RECIST) v1.1
• Provision of recently obtained tumor tissue as per protocol specified requirement
• Anticipated life expectancy greater than 3 months
• Be able to swallow and absorb oral tablets

Exclusion Criteria:

• Participants with Mismatch repair deficient (dMMR) / microsatellite instable-high (MSI-H) colorectal cancer
• Prior therapy with regorafenib, anti-programmed cell death protein 1 (PD-1),programmed cell death protein 1 ligand 1 (PD-L1), or cytotoxic T-lymphocyte-associatedprotein 4 (CTLA-4) inhibitors, or any form of immunotherapy to treat cancer
• Presence of active central nervous system (CNS) metastases; participants with stableCNS disease or previously treated lesions are eligible for study entry
• Poorly controlled hypertension, defined as a blood pressure consistently above 150/90mmHg despite optimal medical management
• Arterial thrombotic or embolic events such as cerebrovascular accident (includingtransient ischemic attacks) within 6 months before the start of study medication.Active pulmonary emboli or deep vein thrombosis that are significant or not adequatelycontrolled on anticoagulation regimen
• Any hemorrhage or bleeding event ≥ National Cancer Institute - Common terminologycriteria for adverse events (NCI-CTCAE) Grade 3 within 28 days prior to the start ofstudy medication
• Participants with an active, known or suspected autoimmune disease
• History of interstitial lung disease or pneumonitis
• Known history of human immunodeficiency virus (HIV) infection or current chronic oractive hepatitis B or C infection
• Other protocol defined inclusion/exclusion criteria could apply