German authorities are investigating building materials giant Knauf for its alleged involvement in the reconstruction of the Ukrainian city of Mariupol, which was heavily damaged during a Russian siege in 2022. Knauf, a major investor in Russia, has denied any wrongdoing, claiming that it only supplies goods to the Russian market. However, Ukraine has labeled the company a ‘sponsor of war.’ Following the announcement of its withdrawal from Russia, Knauf’s assets in the country may be transferred to local management or sold at a 50% discount, as per Russian law.