CSN Mineração (CMIN3) reported in a material fact on Tuesday, September 29, 2026, that it has decided to temporarily reduce low-quality ore production activities at the Dry Processing Plant of the Pires complex, in Ouro Preto (MG), due to a tighter market scenario and pressure from higher freight costs. The measure can be reversed at any time, as long as market conditions ensure better margins for this type of ore.
As a result of the impact from the temporary reduction in production volume and the expectation of lower volumes of third-party purchases in the coming months, the company revised its projections for 2026. The projected volume of production and purchases of third-party ore was cut from a range of 45.0-47.0 million tons (Mton) to a range of 39.0-41.0 Mton.
The projected C1 cash cost in 2026 was changed from a range between US$ 22.0/ton and US$ 23.5/ton to a range between US$ 25.0/ton and US$ 26.0/ton. According to the company, these projections will be included in section 3 of the Reference Form and will be available, within the legal deadline, on the CVM and CSN Mineração Investor Relations websites.
CMIN stressed that the information disclosed represents an estimate and involves market factors beyond its control, does not constitute a performance promise, and may be subject to further changes. The company also stated that it will keep its shareholders and the market informed about the resumption of activities.
