Only the man who fired the fatal shot, Anitelea Chan-Kee, was found guilty of murder by a jury in the High Court at Auckland.
Five other accused - Myron Felise, Tino Felise, Eti Filoa, Walter McCarthy and Jason Naseri - were found not guilty of both murder and manslaughter.
Mefiposeta Chan-Kee, was discharged after being found not guilty of being an accessory after the killing. Tino Felise, Filoa and McCarthy were all found guilty of one charge of aggravated robbery, while Anitelea Chan-Kee, Myron Felise and Naseri previously admitted aggravated robbery.
Sentencing will be at the High Court on April 23.
It was standing room only in the public gallery as around 50 people, Mr Singh's widow Harjinder Kaur among them, waited for the verdicts.
Speaking on behalf of the Singh family outside the court, close friend Daljit Singh said Mr Singh's widow was still in shock.
"We do respect the verdict given by the jury today and the law of New Zealand. But his wife is still in shock that the other five men who were charged with murder have been found not guilty of both murder and manslaughter.
"She's very upset by that, and we'll be keeping our eyes on the sentencing date," Mr Singh said.
He added that the trial made it difficult as the family had to re-live what happened.
Ron Mansfield, representing Myron Felise, said his client was still remorseful for his actions.
"Immediately after this incident he was shocked. He's expressed that quite clearly and that's come out in the end. He's a young man who got caught up in something way beyond what he thought," he said.
"He's very sad and upset about what eventuated and he remains so."
Graeme Newell, representing Jason Naseri, said his client was pleased with the not guilty verdicts.
"He never thought the firearm would be used in the way it was so, he's very relieved about the murder and manslaughter acquittal, that's all that could be expected," Mr Mansfield said.
The jury spent more than 18 hours deliberating. They began discussions about 2.35pm on Monday after Justice Graham Lang concluded his summary of the case in the month-long trial.
Justice Lang thanked the jury for their "sterling efforts" over the past five weeks.
"You've sat through some pretty harrowing evidence, and the fact that you've taken a lengthy time deliberating shows the care you've taken in reaching your verdicts," he said.
The trial followed the fatal shooting of Mr Singh during an armed robbery in his Riverton liquor store in Manurewa East in June 2008. Anitelea Chan-Kee, Myron Felise and Jason Naseri entered the store just after 9pm on June 7.
Felise and Naseri grabbed as much alcohol as they could carry back to the vehicle, while Chan-Kee held up Mr Singh and his business partner, Gurwinder Singh, with the .22 rifle, the Crown said.
By the time Felise and Naseri returned to the store, Navtej Singh had been shot in the abdomen. After the shooting the accused went back to a south Auckland house where they drank the alcohol, the Crown said.
A total of 54 witnesses were called during the trial which began on February 3.
Anitelea Chan-Kee admitted shooting Mr Singh but said he didn't know that the gun was loaded and accidentally pulled the trigger.
Counties Manukau police district commander Mike Bush would not comment on the outcome.
"It is inappropriate for police to provide commentary on judicial outcomes," he said.
"With regards to media queries around the sequence of events on the evening concerned, police cannot comment at this stage as these circumstances are subject of an Independent Police Conduct Authority (IPCA) investigation - the results of which will be delivered by the IPCA."
