UBS has released a new set of rankings for iron ore miners, grading firms on margin outcomes, cost competitiveness and operational indicators. The bank's review positions BHP as the sector leader on the metrics it examined, while calling out both advantages and vulnerabilities among the other large producers.
The assessment comes as producers confront uneven cost bases and shifting price signals in the iron ore market. UBS emphasizes that differences in ore quality - and the premiums or discounts that flow from that quality - along with how efficiently mines operate, are among the decisive factors shaping company-level results in the current environment.
BHP
UBS identifies BHP Group as one of the highest-margin iron ore producers in the group it reviewed. The bank notes that, during the December half-year, BHP's realized prices were not materially affected by its dispute with CMRG. However, UBS warns that Jimblebar discounts widened in the March quarter of 2026, a development that could weigh on future earnings metrics if the trend continues.
Separately cited in market notes, Morgan Stanley has moved BHP's rating from "overweight" to "equal-weight."
Rio Tinto
Rio Tinto recorded a half-on-half improvement in EBITDA per tonne of about $2 in December 2025, a result UBS attributes to a recovery in shipment volumes after cyclone-related disruption in the first half of 2025. Despite that improvement, UBS highlights that Rio Tinto's reported C1 cash cost is roughly $5 per tonne higher than that of BHP and Fortescue. The bank frames this cost gap as a clear area of opportunity for Rio Tinto's new management to address.
Like BHP, Rio Tinto has also seen its rating revised by Morgan Stanley to "equal-weight" from "overweight."
Fortescue Metals Group
Fortescue reports the lowest C1 cash cost among the group for its hematite operations, according to UBS. Nevertheless, the company's EBITDA per tonne remains more than $10 below BHP's level. UBS attributes that shortfall principally to differences in ore quality and the lower realized prices Fortescue receives for its product mix.
Vale
Brazil's Vale improved EBITDA per tonne by $8 half-on-half in the second half of 2025. UBS credits that gain to stronger sales volumes and improved realized prices tied to Vale's product strategy. The bank notes this progress occurred even as high-grade premiums across the market were depressed.
Morgan Stanley has also downgraded Vale, moving the rating to "equal-weight" from "overweight."
Anglo American
Anglo American's iron ore assets - including Kumba and Minas-Rio - produced stable EBITDA per tonne on a half-on-half basis in December 2025. UBS points out that this stability was maintained despite depressed high-grade and lump premiums during the period.
Overall, UBS's rankings underscore how margin performance and unit-cost dynamics are diverging across major producers. Quality-related price differentials and the ability to manage operational cost per tonne emerge as central determinants of comparative performance among the large iron ore companies the bank reviewed.