Maritana Minerals (ASX: MRT)

Maritana Minerals Limited (ASX: MRT) — formerly Horizon Minerals, renamed in April 2026 — is an emerging gold developer and producer advancing a portfolio of assets across Western Australia's prolific Eastern Goldfields.
Following its transformational merger with Poseidon Nickel and the subsequent Gordons acquisition, the company holds a mineral resource base of around 1.88Moz of gold (34.32Mt at 1.7 g/t Au) across roughly 1,386 km² of tenure in some of Australia's most productive gold belts.

Maritana Minerals holds a 100% interest in gold projects in the Kalgoorlie and Coolgardie regions, including the 428,000oz Boorara project and 1,372,000oz in satellite projects in close proximity.

At the centre of Maritana's strategy is the Black Swan Processing Hub, located approximately 50km from Kalgoorlie. Acquired as a brownfield concentrator through the Poseidon Nickel merger, the plant is being refurbished and converted into a gold Carbon-in-Leach (CIL) operation, with front-end engineering design lifting planned nameplate throughput to 2.5Mtpa.