MT Newswires -ShutterstockHere are the NZX-listed companies with the biggest gains on Thursday. Santana Minerals (NZE:SMI): +5%, NZ$0.70Serko (NZE:SKO): +4%, NZ$1.66Pacific Edge (NZE:PEB): +4%, NZ$0.28New Zealand King Salmon (NZE:NZK): +3%, NZ$0.24PGG Wrightson (NZE:PGW): +2%, NZ$2.30Scales Corporation (NZE:SCL): +2%, NZ$6.78Scott Technology (NZE:SCT): +2%, NZ$2.59Precinct Properties NZ (NZE:PCT): +2%, NZ$1.05Contact Energy (NZE:CEN): +1%, NZ$9.19Spark New Zealand (NZE:SPK): +1%, NZ$1.99