Nick Greiner to appeal against 'cartel' conduct ruling BRADKEN chairman Nick Greiner has filed an appeal against a Federal Court ruling that he engaged in "cartel" conduct, in a case that will test the legality of tactics used in commercial bidding wars. Judge Michelle Gordon last month ruled Mr Greiner, a former NSW premier, had organised the "back door" purchase of mining services firm Norcast Wear Solutions by engaging a New York private equity firm to place a lower bid, for a $US22.4 million fee.