⚠ A Smelter Stops for MaintenanceModerate threat

KGHM Polska Miedź (KGH) — threat to the moat

A planned outage moved inventories by billions of złoty; an unplanned one comes without the preparation.

Everything KGHM mines passes through a small number of metallurgical plants, and when one of them stops, the whole chain has to be planned around it.

Inventories carried through the chain (zl m)9 608End-2025 balance+2 606H1 2026 increaseAnode copper stockpiled ahead of the planned Glogow I shutdown in Q3 2026
A planned outage moved billions of złoty of balance sheet. An unplanned one arrives without the preparation.

The Glogow I Copper Smelter and Refinery had a maintenance shutdown in the third quarter of 2026. The visible consequence in the accounts was an inventory build of half-finished products ahead of it — anode copper stockpiled so the rest of the system could keep running1 — and inventories rose 2 606 million złoty over the half-year2.

That was a planned outage, executed deliberately, and it still moved a line on the balance sheet by billions of złoty. An unplanned one is the same event without the preparation: ore keeps coming out of three mines that cannot easily be throttled, and there is nowhere else in the group to send it.

The concentration is structural rather than a matter of policy. Three smelters, one region, one set of licences, and no third-party toll-smelting capacity nearby of the right kind.

The offsetting fact is that these are long-established plants with long-established maintenance cycles, and KGHM has run them for sixty years without a catastrophic interruption.

The scale of the buffer is visible in the balance sheet. Group inventories stood at 9 608 million złoty at the end of 20253 - roughly a third of a year's cost of sales - which is what carrying work in progress across three mines, a concentrator and three smelters requires.

The number to watch is inventories. A rising half-finished inventory balance is the early sign that metal is accumulating somewhere between the mine and the customer, and it moved sharply in the first half of 20264.

References
  1. ReportedThe visible consequence in the accounts was an inventory build of half-finished products ahead of it — anode copper stockpiled so the rest of the system could keep running — and inventories rose 2 606 million złoty over the half-year.
    KGHM Polska Miedz S.A. Group - Management Board's report on activities in the first half of 2026, financial results (revenue of 24 711m złoty up 40,8%, profit for the period of 5 579m against 580m, adjusted EBITDA of 9 198m up 89,1%, capital expenditure of 1 663m, net debt down 13,5% to 4 691m, equity of 39 814m, available financing of 16 978m, and the 1 979m złoty increase in the minerals extraction tax on higher copper and silver prices) — H1 2026 · publ. August 2026 · source ↗
  2. ReportedThe visible consequence in the accounts was an inventory build of half-finished products ahead of it — anode copper stockpiled so the rest of the system could keep running — and inventories rose 2 606 million złoty over the half-year.
    KGHM Polska Miedz S.A. Group - Management Board's report on activities in the first half of 2026, financial results (revenue of 24 711m złoty up 40,8%, profit for the period of 5 579m against 580m, adjusted EBITDA of 9 198m up 89,1%, capital expenditure of 1 663m, net debt down 13,5% to 4 691m, equity of 39 814m, available financing of 16 978m, and the 1 979m złoty increase in the minerals extraction tax on higher copper and silver prices) — H1 2026 · publ. August 2026 · source ↗
  3. ReportedGroup inventories stood at 9 608 million złoty at the end of 2025 - roughly a third of a year's cost of sales - which is what carrying work in progress across three mines, a concentrator and three smelters requires.
    KGHM Polska Miedz S.A. Group consolidated financial statements for 2025 (group revenue of 36 366m złoty with the parent at 30 964m and KGHM INTERNATIONAL at 3 439m; parent copper revenue of 22 378m and silver revenue of 6 133m; minerals extraction tax of 4 693m against 3 865m in 2024 and 3 496m in 2023; employee benefits of 6 303m; purchased metal-bearing materials of 8 335m; parent net profit of 1 946m against a group profit of 3 688m; total assets of 58 240m, equity of 32 898m and involvement in the Sierra Gorda joint venture of 10 250m including 8 436m of loans) — FY2023-FY2025 · publ. 10 March 2026 · source ↗
  4. ReportedA rising half-finished inventory balance is the early sign that metal is accumulating somewhere between the mine and the customer, and it moved sharply in the first half of 2026.
    KGHM Polska Miedz S.A. Group - Management Board's report on activities in the first half of 2026, financial results (revenue of 24 711m złoty up 40,8%, profit for the period of 5 579m against 580m, adjusted EBITDA of 9 198m up 89,1%, capital expenditure of 1 663m, net debt down 13,5% to 4 691m, equity of 39 814m, available financing of 16 978m, and the 1 979m złoty increase in the minerals extraction tax on higher copper and silver prices) — H1 2026 · publ. August 2026 · source ↗
Sources
Generated September 24, 2026