The group invests in a diverse range of sectors, including agri-food, energy, resources, property, hospitality, sports and entertainment.
The name Tattarang pays tribute to a "fiery but caring stallion" that was owned by Andrew Forrest's mother on the Minderoo Station during the 1950s.
The Forrests said the name "signified the unique bond of trust that is formed between a rider and their horse, and the seriousness each party invests in caring for and protecting the other".
The Tattarang group entities remain separate from Minderoo Foundation, the philanthropic entity founded by Andrew and Nicola Forrest.
Tattarang holds a 36% stake in Fortescue Metals Group and is its largest shareholder.
The company recently appointed former NAB executive Andrew Hagger as CEO.