Vector Limited is a multi-network infrastructure company in New Zealand. It is the national number one provider of electricity distribution number one provider of gas transmission and distribution number one provider of electricity and gas metering number two wholesaler of LPG and number three wholesaler of natural gas. It also owns a fibre optic cable network. Its customers hold 75.1% of its shares through the Auckland Energy Consumer Trust and 24.9% of its shares are traded on the NZX.
It is the successor of the Mercury Energy .