Edward Coakley's Motherwell-based business – known as Coakley Bus & Coach Ltd and, later, as the Braidhurst Bus Company – had its public service vehicle operator licence revoked in May at a hearing held by the Traffic Commissioner for Scotland.
The firm then went into liquidation with the loss of 55 jobs.
At that hearing, Coakley asked Commissioner Joan Aitken to consider his application for a sole-trader public service vehicle licence.
But after consideration, that was refused for "a lack of repute, financial standing, and professional competence".
The commissioner called Coakley to a Driver Conduct Hearing after he was convicted at Hamilton Sheriff Court in March of two counts of breach of the peace, pleading guilty to one charge of assault.
The breach of the peace charges relate to two incidents in October 2009, in which Coakley made threats of violence against two employees of First Bus Group at West Hamilton Street in Motherwell.
It is understood Coakley believed the First Group employees were making malicious allegations against his business.
Then in May 2010, he assaulted a man at the Saints & Sinners pub in Bellshill by punching him on the head.
Ms Aitken's report reads: "In relation to the October 2009 case, Mr Coakley was monitoring buses in the area and had an exchange with a First Group employee.
"It was a simple exchange between competitors.
"Mr Coakley considered the allegations malicious with the purpose of getting Mr Coakley before me."
Coakley's application for a sole-trader licence was refused as a result of these convictions, but also because he could not prove he had the financial backing to run a reliable bus company.
Ms Aitken's report said that, during the hearing, "it became clear there was little evidence of the company's financial standing".
Coakley also runs a number of pubs and, as a result of the convictions, The Coachman's Tavern in Bellshill had its licence suspended for 14 days, while the Eagle Inn in Motherwell was suspended for seven days.