Merrex Gold was a Canadian junior exploration company primarily focused on gold exploration projects. It was particularly known for its activities in West Africa, specifically in Mali, where it had joint ventures with IAMGOLD Corporation, a major player in the gold mining industry. The company's flagship project was the Siribaya Gold Project, located in a prolific gold-producing region of Mali, which showed promising gold exploration results.

Merrex Gold's strategy involved advancing exploration projects to increase the resource base and prove up reserves, with the ultimate goal of development or partnership with larger mining companies. In 2017, IAMGOLD fully acquired Merrex Gold, absorbing its assets, including the Siribaya project.

The acquisition of Merrex Gold helped IAMGOLD strengthen its foothold in West Africa, which is an important region for gold production.