In this study, Electromagnetic Levitation (EML) technique was utilized to explore the effect of bulk supercooling and rapid solidification in alloys with Co(46)Ni(27)Ga(27) and Co(48)Ni(22)Ga(30) (at.%) compositions. The effects of gamma + beta on the martensitic and austenitic transformation temperatures and magnetic properties were investigated. The presence of gamma phase was found to suppress the martensitic and austenitic transformations to below room temperature. Bulk supercooling and rapid solidification led to the formation of homogeneous martensitic phase from the hyperperitectic Co(46)Ni(27)Ga(27) alloy. In contrast with pure martensite phase in Co(48)Ni(22)Ga(30), the hyperperitectic martensite in supercooled Co(46)Ni(27)Ga(27) sample showed no grain boundaries microsegregation and embrittlement that caused deep cracks along grain boundaries. The sample had a high Curie temperature about 400 K and good directional magnetic properties.