PhosCo Ltd (ASX:PHO) is an Australia-based mineral exploration company focused on developing a district-scale phosphate portfolio in Tunisia's Northern Phosphate Basin to support a potential world-class fertiliser hub. The company holds 100% interests in the Gasaat Phosphate project, located in the Kasserine region and encompassing the former Chaketma project with interpreted deposit extensions; the Sekarna Phosphate project, an early-stage analogue to Gasaat positioned to complement a large-scale fertiliser hub; and the Djebba and Zeflana Zinc projects targeting base metals deposits, all situated in northern and central Tunisia. PhosCo aims to produce rock phosphate and fertiliser products to meet global agricultural demand, while investing in green technologies to enhance environmental outcomes in phosphate and fertiliser production; it operates solely in the Tunisia geographic segment, targeting markets in Europe and beyond due to the country's strategic North African location proximate to key export destinations. Founded in 2009 and headquartered in Melbourne, Australia, the company, formerly known as Celamin Holdings Limited, changed its name to PhosCo Ltd in January 2022 to reflect its sharpened focus on phosphate opportunities. In October 2025, PhosCo received a $1.8 million grant from the European Bank for Reconstruction and Development to advance its phosphate exploration efforts; earlier funding included a AU$1 million capital raise via convertible notes in January 2024 to support on-ground work at the Simitu and Sekarna projects.