KiwiSaver ditched most tobacco companies in 2017, but there's still a lot of 'sin stocks' in KiwiSaver funds. Each KiwiSaver fund invests in a different mix of companies. This video shows total combined holdings across all KiwiSaver funds.

Fossil fuels and illegal weapons will be excluded from all future Kiwisaver default funds.

The changes announced on Saturday mean investments in fossil fuel production and illegal weapons will be excluded from future KiwiSaver funds that are default providers.

There are currently nine default fund providers, and their terms expire in mid-2021.

The new rules will apply to the default funds that are in place from mid-2021 and the process to appoint new default providers starts later this year.

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Green Party Co-leader James Shaw has welcomed the move to bring an end to KiwiSaver investments in fossil fuels.

"Moving money away from dirty energy is important if we are to create cleaner, greener and safer communities in every part of the country," he said.

Changes to KiwiSaver will see investments in fossil fuel production and illegal weapons excluded from future KiwiSaver funds that are default providers.

People setting aside money for the future want to know their savings are being put to good use and are helping to create a better future, he said.

Rules set down by previous governments allowed funds to be used to support the fossil fuels companies that are the leading cause of the climate crisis, he said.

But this Government has put people and the planet first, he said.

"We are making KiwiSaver better for our future, better for our kids and better for our climate."

ROSA WOODS/STUFF Green Party Co-leader James Shaw welcomed the move but said others need to follow suit to end all investments in fossil fuels.

"For us to create the clean, green communities most New Zealanders want, we need to go further and faster. We need more bold actions like the one we announced today, and we need others that are holding large purse strings to follow KiwiSaver and end their investments in fossil fuels."