OMHex, operator of the Swedish and Finnish stock exchanges, has sold the Natural Gas Exchange (NGX) to Toronto Stock Exchange Group (TSX), operator of Canada's two national stock exchanges, for C$38m (€30m).

The sale is part of a restructuring which has seen OMHex offload non-core assets to focus on creating a pan-Nordic cash and derivatives exchange and a technology business. Since making a bid to buy the London Stock Exchange four years ago, OMHex's revenue have dived, due largely to lower trading volumes and lower demand for its technology.