Glesatinib is an orally administered multi-targeted tyrosine kinase inhibitor (TKI) that primarily targets the Axl and Mesenchymal-Epithelial Transition (MET) receptors. Sitravatinib is an orally-available, potent small molecule inhibitor or a closely related spectrum of receptor tyrosine kinases (RTKs) including MET, Axl, MERTK, VEGFR family, PDGFR family, KIT, FLT3, Trk family, RET, DDR2 and selected Eph family members. Mocetinostat is an orally administered histone deacetylase (HDAC) inhibitor. Nivolumab is a human IgG monoclonal antibody that binds to the programmed cell death-1(PD-1) receptor and blocks its interaction with programmed cell death ligand-1 (PD-L1) and PD-L2, releasing PD-1 pathway-mediated inhibition of the immune response including anti-tumor immune response. Combining an immunotherapeutic PD-L1 checkpoint inhibitor with an agent that has both immune modulatory and antitumor properties could enhance the antitumor efficacy observed with either agent alone.