benchmark holdings plc on wednesday said that it plans to raise 132 million pounds 158 million via a private placing and retail offering on euronext oslo the londonlisted aquaculture biotechnology company said that the planned listing in oslo will give the company access to a unique financial aquaculture ecosystem and global base of specialist sector investors and analysts if approved the company expects to start trading on the oslo stock exchange around dec 15 under the placing and retail offer benchmark is issuing 352 million new ordinary shares at nok450 each 450 cents benchmark said that its three largest shareholdersferd as kverva finans as and jne partners llpwhich own 6884 of its issued share capital between themhave agreed to support the private placing and subscribe for shares