MLC was an Australian business that provides investments, insurance and superannuation solutions to corporate, institutional, and retail customers.

Due to divestments in the early 21st century, there are now two businesses, with no ownership links, that both use "MLC" in their branding: The company traces its origins to the Citizens’ Assurance Company Limited, registered on 31 December 1886 for the stated purpose “to popularise Industrial Life Assurance, and to carry it to the homes of the working classes by issuing policies for small amounts and receiving the premiums thereon each week”.

[4] In October 2016, the insurance division of MLC limited was divested by National Australia Bank, with Nippon Life Japan acquiring a majority stake (80%).

On 31 May 2021, the National Australia Bank sold its remaining "MLC" branded wealth management businesses to Insignia Financial (then known as IOOF).

Over its long history, MLC Has occupied a number of prominent buildings in Sydney.