  We report single crystal growth of CoSi, which has recently been recognized
as a new type of topological semimetal hosting fourfold and sixfold degenerate
nodes. The Shubnikov-de Haas quantum oscillation (QO) is observed on our
crystals. There are two frequencies originating from almost isotropic bulk
electron Fermi surfaces, in accordance with band structure calculations. The
effective mass, scattering rate, and QO phase difference of the two frequencies
are extracted and discussed.
