The present application relates to salts of Compound A, 3-(3-(4-(1-aminocyclobutyl)phenyl)-5-phenyl-3H-imidazo[4,5-b]pyridin-2-yl)pyridin-2-amine, solid state forms of Compound A free base or of salts of Compound A, amorphous forms of Compound A free base or of salts of Compound A, crystalline forms of Compound A free base or of salts of Compound A, polymorphs of Compound A free base or of salts of Compound A, and mesomorphs of Compound A free base or of salts of Compound A. The present application also relates to pharmaceutical compositions comprising these salts, solid state forms, amorphous forms, crystalline forms, polymorphs, or mesomorphs of Compound A free base or of salts of Compound A. The present application provides methods for preparing these salts, solid state forms, amorphous forms, crystalline forms, polymorphs, or mesomorphs of Compound A free base or of salts of Compound A.