From UP, Kanpur Electricity Supply Company (Kesco) showed marked improvement, moving up to B grade from C last year. Along with all the four discoms of Gujarat, Kesco was the best performer on cost coverage ratio, said the report reviewed by Business Standard. For other UP discoms, the concerns were weak financials, high aggregate technical & commercial (AT&C) losses, and negative net worth due to sustained losses. All the three discoms of Rajasthan are in the B rank category due to high power purchase costs and low bill collection efficiency.