Solidium has sold 3.3 million shares in Outokumpu since last week to cut its holding in the company to 23.0 percent, Outokumpu's website showed.

Solidium was not available for immediate comment.

The stock traded at 9.04 euros by 0716 GMT, up 0.6 percent from Monday's close.

(Reporting by Jussi Rosendahl; editing by Jason Neely)