BAY 1125976 is a selective allosteric AKT1/2 inhibitor,exhibits high efficacy on AKT signaling-dependent tumor growth in mouse models. BAY1125976 inhibits the activity of AKT1 (IC50 = 5.2 nM at 10 µM ATP and 44 nM at 2 mM ATP) and AKT2 (IC50 = 18 nM at 10 µM ATP and 36 nM at 2 mM ATP) very potently.Whereas BAY1125976 is almost inactive on AKT3 (IC50 = 427 nM at 10 µM ATP).