The company founded by his father Nick Curtis, which has employed Oliver since the insider trading allegations surfaced, has disappeared from view.

Riverstone Advisory has effectively been mothballed, its website has been taken down and most of the employees - other than Nick and Oliver - are trading under the name of a separate company that shared Riverstone's address and phone number: HHK Advisory.

This includes Kevin Hobgood-Brown, Riverstone's former boss who was among those who vouched for Oliver's character at last Friday's sentence hearing before Justice Lucy McCallum.

Hobgood-Brown described Oliver as a "a role model to others" and said there was a  "close to zero" chance of him reoffending.

Oliver's wife, publicist Roxy Jacenko, also made an impassioned plea for her husband to stay out of jail describing him as a  "kind, considerate, honest and reliable man".

The closure of Riverstone Advisory will have little relevance for Curtis Jr.

Even if he manages to avoid jail time on Friday, he will be banned from managing a company, or acting as a company director for five years from the date of his conviction.

If he is given a custodial sentence, he will serve a five-year ban from the day he is released from prison.

John Hartman, Oliver's childhood friend and his partner in crime - who served as the prosecution's key witness - served 15 months in prison as a result of his conviction, and is still serving an ASIC ban barring him from managing a company or acting as a company director. Hartman has found employment with the private company of billionaire Andrew Forrest.

According to documents lodged with ASIC, Oliver Curtis has yet to resign as director of Riverstone.

Oliver faces the prospect of up to five years in prison, a $220,000 fine, or both.

Crown prosecutor David Staehli, SC, urged Justice McCallum to impose a full-time jail sentence to reflect the seriousness of the offence and serve as a general deterrence in the community. He argued for a sentence of around two years.

Curtis' defence argued for a non-custodial sentence given what he has already been through.

"There isn't a person in Sydney who would want to have to live through what he and his family have lived through since 2009," defence barrister Murugan Thangaraj said.

More controversially, the Institute of Public Affairs - a conservative think tank - came out last Friday arguing that white-collar criminals like Curtis should literally pay for their crimes rather than face prison.

"It might be argued that this is unfair because it allows wealthy offenders to buy their way out of prison. But there is a genuine principle at stake," said the IPA's Andrew Bushnell. "Whatever their social status, non-violent, low-risk offenders should be given the chance to avoid prison."

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