Gareth Morgan has quit The Opportunities Party (TOP).
Morgan says the main reason he is leaving is to pour energy into other projects.
Morgan donated about $2 million to TOP to contest the 2017 election.
He has put in about twice that amount overall, including what it took to set up the party from scratch.
Morgan’s son, Sam Morgan, was the person who set up the New Zealand auction website, Trade Me. The site was started in 1999 and sold for $700million in 2006.
Gareth Morgan led the party in the 2017 election, when TOP won 2.4 per cent of the party vote.
He stepped down as leader after the election, but he stayed on in the policy team.