Z Energy Limited is a leading fuel supplier in New Zealand. The company caters to both retail and commercial customers by providing transport fuel, including biodiesel and electric options. It also offers a fuel card for businesses to purchase fuels. Z Energy owns and manages a network of branded retail service stations, truck stops, and infrastructure for storage and transportation. The company, which was previously known as Greenstone Energy Limited, was founded in 1959 and is headquartered in Wellington.