OIO general manager Vanessa Horne welcomed the decision.
"The judgment reinforces that overseas investment in New Zealand is a privilege and there are ongoing responsibilities when investing here."
Agria has been ordered to pay $100,000 in penalties while Lai has been ordered to pay $120,000 in penalties and another $30,000 towards the OIO's costs.
Horne says the size of the penalties reflects the serious nature and extent of the securities violations alleged in the US, which involved fraudulent accounting and share price manipulation.
As part of its settlement with the OIO, Agria agreed to divest its interest in Wrightson to below 50 percent, which it did in December last year. Agria, which is a Cayman Island registered company, now owns 46.6 percent of Wrightson.
Lai, who used to chair Wrightson and is also known as Lai Guanglin, is a citizen of Singapore who lives in Hong Kong.