Facing protests over its asset sales plans, the government has launched a new information website for the public.

State Owned Enterprises Minister Tony Ryall announced the share offers website on Thursday, which includes information on how to buy shares.

The government is planning to sell up to 49 per cent of four state-owned energy companies, Mighty River Power, Genesis Energy, Meridian and Solid Energy, and reduce its stake in Air New Zealand.

Website users can choose to be notified when each share offer commences, with the government planning to proceed with the first share offer, of Mighty River Power, later this year.

The launch of the website comes as a hikoi protesting asset sales reached the Wellington office of Ohariu MP Peter Dunne, who holds the deciding vote on asset sales.

With his support, the government has 61 votes to pass asset sales legislation, with 60 votes opposed.

The 200-strong protest march began in Cape Reinga last month.

• More information is at www.governmentshareoffers.govt.nz