Rich Lister iron ore billionaire Andrew Forrest’s agrifoods unit has lifted its stake in Vegemite owner Bega Cheese to 11.5 per cent after buying an additional $15 million in shares.

Mr Forrest’s Tattarang investment arm acquired an extra 4.55 million shares in Bega, continuing the steady accumulation of a holding in the food group that began more than nine months ago. Tattarang’s substantial shareholder notice to the ASX late on Friday showed it had lifted its holding from a previous 10 per cent stake.