UGI gains after report KKR makes $9 bln takeover bid for co

** U.S. natural gas and electricity distributor UGI Corp UGI.N shares rise more than 12% to $39.59

** Private equity firm KKR has offered to buy UGI for $9 billion, at $42.50 per share, as per a WSJ report ** The offer represents a premium of 21.1% to UGI's closing price on Monday, according to Reuters calculations

** Up to last day's close, the stock is up 5.5% YTD