✦ A Fourth Grinding Line, and Three Years Off the Mine LifeNarrow moat

KGHM Polska Miedź (KGH) — the future bets

725 million dollars to lift annual output a fifth by emptying the pit sooner - and KGHM says so in writing.

KGHM's biggest growth project comes with a disclosure most mining companies would have buried.

The Sierra Gorda expansion, approved 30 June 2026USD725mon a 100% basis+20%annual payable metal-3 yrslife of themined deposit2027-28heaviest spendingAt the half-year no contractors were appointed and financing was still under negotiation
A fourth grinding line does not create ore. It empties the pit faster - and KGHM says so in the filing.

On 30 June 2026, jointly with South32, KGHM took the investment decision to build a fourth grinding line at the Sierra Gorda ore processing plant in Chile. The capital expenditure is 725 million dollars on a 100% basis, to be financed by debt raised at Sierra Gorda and by its own operating cash flow. The stated benefits are a reduction in average unit C1 cost over the life of the mine and an increase in annual payable metal output of approximately 20% from higher processing capacity — with a shortening of the life of mine by three years on the currently-mined deposit1.

Read that last clause carefully, because it is the whole project. A fourth grinding line does not create ore. It processes the existing ore faster, which raises annual output, lowers unit cost through better utilisation, and empties the pit sooner.

That can be exactly the right decision. Pulling metal forward into a period of record copper prices is worth real money, and the mine has a reserve of about 1 100 million tonnes to work through2.

The risks are ordinary and current: at the half-year the project was still in preparation, with no agreements concluded with key contractors and financing terms still under negotiation3. The heaviest spending falls in 2027-20284.

The measure is delivery against the 725 million dollar budget, on a project KGHM does not control alone.

Moat trajectory: Widening

Approved on 30 June 2026 at 725 million dollars for about 20% more annual metal, with the heaviest spending in 2027-2028.

The number that tests this moat
Reported
Sierra Gorda cash capital expenditure, first half
USD275m in H1 2026 (100% basis), +5,8%

The expansion shows up here first; the payoff is in Sierra Gorda's copper sales, 72,3 kt in the half against 77,8 kt.

Source: KGHM Polska Miedz S.A. Group - Management Board's report on activities in the first half of 2026 ↗
References
  1. ReportedThe stated benefits are a reduction in average unit C1 cost over the life of the mine and an increase in annual payable metal output of approximately 20% from higher processing capacity — with a shortening of the life of mine by three...
    KGHM Polska Miedz S.A. Group - Management Board's report on activities in the first half of 2026, the Strategy of the KGHM Group 2055+ approved on 3 July 2026 and its targets (payable copper production above 730 thousand tonnes a year of which about 590 thousand from Polish assets including 180 thousand from scrap, adjusted EBITDA averaging 12 billion złoty at a 25,6% margin, capital expenditure above 32 billion złoty across 2026-2030, at least 220 MW of installed renewable capacity, the Sierra Gorda fourth grinding line at 725 million dollars raising output about 20% while shortening the life of mine by three years, the Deep Glogow Deposit Access Program, and shareholders including the State Treasury at 31,79%) — 2026-2030 and beyond · publ. August 2026 · source ↗
  2. ReportedPulling metal forward into a period of record copper prices is worth real money, and the mine has a reserve of about 1 100 million tonnes to work through.
    KGHM Polska Miedz S.A. Group - Management Board's report on activities in 2025, the financial review and metal markets (adjusted EBITDA of 10 276m złoty against 8 457m in 2024, 5 362m in 2023, 8 865m in 2022 and 10 327m in 2021, of which Sierra Gorda contributed 3 115m and KGHM INTERNATIONAL 1 860m; average copper of 9 945 USD/t against 8 478 in 2023; average silver of 40,03 USD/oz against 28,27 in 2024 and 23,35 in 2023; and an average USD/PLN rate of 3,76 against 4,20 in 2023) — FY2021-FY2025 · publ. 10 March 2026 · source ↗
  3. ReportedThe risks are ordinary and current: at the half-year the project was still in preparation, with no agreements concluded with key contractors and financing terms still under negotiation.
    KGHM Polska Miedz S.A. Group condensed consolidated financial statements for the first half of 2026 (the note stating that revenues from no single contractor exceeded 10% of group sales, the geographical breakdown by end-customer location totalling 21 927m złoty with Poland at 4 845m and Germany at 2 815m, parent revenue of 14 430m from copper and 5 843m from silver, the amending act on the minerals extraction tax in force from 1 January 2026, the group structure and equity accounting of Sierra Gorda, and derivative counterparty concentration) — H1 2026 · publ. August 2026 · source ↗
  4. ReportedThe heaviest spending falls in 2027-2028.
    KGHM Polska Miedz S.A. Group - Management Board's report on activities in the first half of 2026, the Strategy of the KGHM Group 2055+ approved on 3 July 2026 and its targets (payable copper production above 730 thousand tonnes a year of which about 590 thousand from Polish assets including 180 thousand from scrap, adjusted EBITDA averaging 12 billion złoty at a 25,6% margin, capital expenditure above 32 billion złoty across 2026-2030, at least 220 MW of installed renewable capacity, the Sierra Gorda fourth grinding line at 725 million dollars raising output about 20% while shortening the life of mine by three years, the Deep Glogow Deposit Access Program, and shareholders including the State Treasury at 31,79%) — 2026-2030 and beyond · publ. August 2026 · source ↗
Sources
Generated September 24, 2026