Sydney PR queen Roxy Jacenko has pleaded with the Supreme Court to not jail her husband for insider trading because he was a hands-on dad and there was no room in their apartment for a live-in sitter.

In a letter penned to Justice Lucy McCallum, the founder of PR firm Sweaty Betty set out a list of reasons why her husband Oliver Curtis should be granted leniency.

Among the top of the list is the commitments her husband has to their children Pixie Rose, 4, and Hunter, 2.

The family nanny had recently resigned and Jacenko wrote there was no room in their three-bedroom Bondi apartment to place a live-in sitter.

If her husband was jailed, Jacenko said she would be forced to scale back her work in order to take care of their children.

"While I have a team of staff to assist me, I am the face of the business and my clients demand a personal touch," Jacenko said in her letter.

"If Oli were to be sent to jail our children will lose the close relationship they have with their father for a period of time.

"Given their ages I am worried about the effect this will have on them."

Last week Curtis, 30, was found guilty of conspiracy to commit insider trading.

Curtis secured a $1.43 million windfall through 45 trades that were based on illicit tip-offs given to him by his childhood friend, former Orion Asset Management employee John Hartman, between May 2007 and June 2008.

During a sentencing hearing on Friday, Crown prosecutor David Staehli SC noted that at the time Curtis committed his crimes they carried a maximum penalty of five years' jail. That penalty has since been doubled.

Mr Staehli urged Justice Lucy McCallum to hand Curtis a full-time custodial sentence.

"An actual custodial sentence, sometimes called a full-time custodial sentence, is appropriate to acknowledge the need for general deterrence in a case like this," the prosecutor said.