The BBC has reported that John Hulme, Darren Price and Anne Price have appeared at Mold Crown Court and denied intending to make a gain for Gwynedd-based Padarn Bus and falsifying a claim form.
It is alleged the company exaggerated the number of concessionary passengers it carried to Gwynedd council. Mr Hulme, 54, Mr Price, 44, both of Caernarfon, and Ms Price, 29, of Llanberis, all deny the charges.
Mr Hulme is accused of a £496,000 fraud between July 2011 and December 2012 while Mr and Ms Price both deny fraud involving £318,500 between January 2013 and February 2014 and falsifying council claim documents.
All three will go on trial in November.