GAMING regulators are investigating whether to take action over Carlton football star Chris Judd's attempt to conceal a $500,000 investment in a pokies venture.

As reported by The Age today, in January 2009 Judd's company Three Zebras invested the money in poker machine operator Sovereign Hotel Group through a company controlled by Carlton director Mark LoGiudice, Crawfords Leisure Group.

In evidence to the County Court earlier this year, Sovereign director Mario Scerri said he had asked many times for information about Judd's investment.

"Chris Judd didn't want his name to appear on a public register, being involvement in a gaming industry company," he told the court.

The court decided that Sovereign should give the investment, which took the form of a loan, back to Crawfords.