The jury said Koch deserves $12 million in punitive damages on top of the $380,000 in compensatory damages he was awarded a day earlier, the New York Daily News reported.
Koch went to court after two dozen bottles of Bordeaux he bought from Greenberg for $300,000 turned out to be undrinkable fakes.
"Out of sight, over the moon," Koch said upon leaving the courthouse while clinching one of the wine bottles, a purported magnum of 1921 Chateau Petrus he paid $29,500 for in 2005.
Koch said he would use his award money "set up a fund to go after wine fraud and auction fraud."
"There's been a huge code of silence in this industry," he said. "My whole point is to shine a bright light on it. The perpetrators are now warned and there are now serious consequences."
The Daily News said Greenberg spent $5 million defending himself He said Koch had rejected his offer of a refund back in 2007 and found the jury's decision "disappointing."
"I'm sorry the wines I sold Mr. Koch were counterfeit," Greenberg said. "I thought they were real."