Canopy Rivers said late Wednesday it had appointed current president Narbé Alexandrian to the chief executive job. Until Wednesday, Canopy Growth Corp. CEO Bruce Linton served as interim CEO of Rivers. Linton will remain on Rivers' board as chairman. Canopy Rivers is the publicly traded venture capital-type unit of Canopy Growth, the world's largest weed company. Canopy Rivers stock closed up 2.9% during the regular session Wednesday and Canopy Growth stock closed up 2.3%. The S&P 500 index fell 0.3% Wednesday.