As of May 2022, Pirelli's key stakeholders are Marco Polo International (37.01 percent), Camfin S.p.A. (14.10 percent), Silk Road Fund (9.02 pefcent), LongMarch (3.68 percent) and Brembo S.p.A. (5.20 percent). The rest of the shares are owned by retail and institutional investors. In addition to Pirelli, Marco Polo International holds a 52-percent stake in Milan-based Prometeon Tyre Group, which manufactures truck and bus tires and was previously Pirelli's commercial tire business.