Capstone Copper (ASX:CSC) said it expects "stable" consolidated copper production for 2026 compared with 2025, according to a Wednesday filing with the Australian bourse.

The company expects to produce 200,000 to 230,000 tonnes, with C1 cash costs of $2.45 to $2.75 per pound of payable copper.

It recorded consolidated copper production of 224,764 tonnes for 2025, an earlier filing showed.

It expects total sustaining capital expenditure of $270 million and total expansionary capital expenditure of $225 for the year.

Shares of the company fell 18% in recent Wednesday trade.