As part of the deal, the Lundin Family Trust also agreed increase its stake in the company from 17.7% to 19.9%.
Bullion is now 18% higher for the year, boosted by anticipation of Fed loosening as well as significant buying by central banks.
Barrick Gold's second-quarter gold output edged up by almost 0.9% from the previous three months.
The company's Flat gold project is located 40 km north of the giant Donlin gold project.
