Fortuna Metals (ASX:FUN) fires up the aircore rig that unlocked Kasiya’s 1,800Mt

The 5,000m program tests whether Mkanda’s grade holds at depth before July’s maiden resource lands

Fortuna Metals (ASX:FUN) has kicked off a 5,000m aircore drilling program at its Mkanda rutile and graphite project in Malawi, and the timing is deliberate. The rig starts turning weeks before the maiden Inferred Mineral Resource Estimate is due to land in July 2026. Management is trying to test how deep the high-grade mineralisation runs before the resource is even printed.

The comparison Fortuna keeps pointing at is Sovereign Metals’ neighbouring Kasiya project, 20km to the north. When Sovereign moved from hand auger drilling to aircore, its resource expanded from around 644Mt to roughly 1,800Mt as deeper saprolite came into play. That is the playbook Fortuna is now running on the same weathered gneiss belt.

The context matters. Fortuna acquired Mkanda in September 2025, has drilled 10,713m across 1,323 hand auger holes to an average depth of 8m, and just posted a 96.66% TiO2 rutile product from its bulk sample. Today’s aircore start is the bridge between the shallow story already on the board and the deeper resource case that determines whether Mkanda is a discovery or a development asset.

Why the depth question is the whole story right now

Hand auger drilling is a cheap and fast way to map surface mineralisation, but it caps out around 8 to 10m. Aircore drilling can push through the free-dig saprolite to roughly 20m, which is where Kasiya’s tonnage came from once the deeper zones were tested.

The maiden resource due this month will be built almost entirely on hand auger data at 400m by 400m spacing. That means it will capture the shallow blanket of mineralisation but almost certainly understate what sits below. The aircore program running through July, August and September is the mechanism that turns a first-pass number into a resource with real scale.

We think this is why management is pushing the rig into the ground before the maiden resource lands rather than after. The market is going to see the July number as an opening bid, not the final position. Getting deeper holes going now compresses the gap between the first estimate and the upgrade that actually matters.

The Kasiya read-across is doing serious analytical work

Sovereign’s Kasiya deposit sits on the same Lilongwe Plain weathered gneiss that Fortuna’s tenements cover across a 70km strike. Kasiya’s ore reserve was upgraded from 0.96% rutile to 1.51% rutile equivalent once graphite credits were included, and the deposit also hosts strategic heavy rare earths identified earlier this year.

Fortuna is drilling for the same three commodities in the same geological setting. The hand auger results already show the same geometry Sovereign described at Kasiya, namely core high-grade zones to end of hole flanked by shallower surface mineralisation. The 96.66% TiO2 rutile product Fortuna posted last month sits above Sovereign’s 95.7% DFS spec.

The skeptical read is that geological analogues do not always deliver economic analogues, and Mkanda still has to prove tonnage, grade at depth and metallurgy on a resource scale. But the analogue is now supported by real product data, not just a slide deck.

The WNDRCO clock and the resource cadence investors should watch

Silicon Valley fund WNDRCO paid A$8.6m for 19.9% of Fortuna last year, with the bulk of its options tied to Fortuna delivering a US strategic partner by mid-2029. That vesting condition is still the elephant in the room, and none of the downstream conversations happen without a printed resource number.

The 2026 aircore program is designed to lift resource category from Inferred toward Indicated by drilling on tighter 200m by 200m spacing. Kampini, Fortuna’s second project on the same belt, is scheduled for first-pass reconnaissance in the second half of 2026. Results are expected to flow through H1 2027.

The Investors Takeaway for Fortuna Metals

The next 90 days are the most consequential window Fortuna has faced since acquiring Mkanda. The maiden resource lands in July, the aircore rig will be reporting depth extension data through the September quarter, and the offtake conversations that started after the 96.66% TiO2 result now need a tonnage number to attach to.

Our view is that the July resource is a floor, not a ceiling, but only if the aircore data actually confirms high-grade mineralisation continues below 10m. If it does, Fortuna moves from being framed as a Sovereign lookalike to being valued as a standalone rutile developer with its own resource curve. If it does not, the whole Kasiya read-across gets marked down. Investors can find our earlier coverage of the 96.66% TiO2 result and the WNDRCO overhang at stocksdownunder.