The single charge under the Securities Act was brought by the Financial Markets Authority and carries a maximum penalty of five years' imprisonment or fines of up to $300,000.
Ludlow also faced seven charges for making false financial statements.
Although Ludlow's lawyer Grant Collecutt requested this morning that Ludlow's sentencing take place on Friday, the FMA said it would be more appropriate for sentencing to take place in the New Year.
Justice John Priestley earlier indicated sentencing would likely happen in January because Ludlow was already incarcerated and there were "complicated issues" with his case.
It would be unfortunate if he was "sentenced on the hoof", Justice Priestley said.
"This is not a simple task....I'm not going to do it in a once-over -lightly fashion," he said.
Ludlow will be sentenced on January 26 next year.
The Serious Fraud Office also laid criminal charges against Ludlow relating to theft of a person in a special relationship and false accounting.
He was found guilty in July 2011. In October, he was sentenced to five years, seven months imprisonment.
"There is nothing to do in Mt Eden...it's a horrible environment," he said today.
"I have through a friend of mine enrolled to do some correspondence education. I can't do that in Mt Eden...I wish to move on from Mt Eden."
Ludlow plans to do a business course through the Open Polytechnic, his lawyer said outside court.
Ludlow openly discussed issues with his accommodation with Justice Priestley, despite being advised to use a lawyer to communicate with the court.
"I can't help you. You've been found guilty and sentenced to jail," the judge said.