Les Mills gym boss Phillip Mills has donated a total of $125,000 to Labour and the Green Party in recent weeks.
Recent filings on the Electoral Commission website show Mr Mills donated $14,999 to Labour in early December, followed by a further $50,000 early this month.
He also donated $60,000 to Green Party on April 11.
The donations are the largest for either party reported on the Electoral Commission site.
Mr Mills is also the backer of the Pure Advantage green business lobby group
Rich-lister and son of former Auckland Mayor Sir Les Mills, Mr Mills founded Pure Advantage three years ago with other prominent business people, Rob Morrison, Sir George Fistonich, Rob Fyfe, Chris Liddell Jeremy Moon, Geoff Ross, Sir Stephen Tindall and Joan Withers.