Disgraced former New South Wales Labor politician Eddie Obeid has lost his entire case against the Independent Commission Against Corruption (ICAC), its former commissioner and officials.

In August this year, Eddie Obeid and three of his five sons attempted to sue the ICAC, its former head David Ipp, the ICAC's counsel assisting Geoffrey Watson SC and two officials, Grant Lockley and Paul Grainger.

The Obeids claimed the corruption investigation unfairly targeted them during a 2012 inquiry known as 'Operation Jasper', which examined a $30-million coal deal, which led to criminal charges against Eddie Obeid and his son Moses.

Supreme Court Justice David Hammerschlag dismissed the entire case ruling that the Obeids were not denied procedural fairness, that it was not established that Mr Ipp acted beyond his power and that the Obeids did not establish that they actually suffered any loss.

"The plaintiffs have failed against all defendants," Justice David Hammerschlag said of the Obeids in his written judgment.

Outside court, Eddie Obeid's son Moses Obeid gave little comment but said the family may appeal.

"There's a long way to go yet," he said.

The costs for the case are to be decided in February and are likely to run into the millions as up to 30 barristers were engaged at various points during the lengthy hearing.