Investor AB is a Swedish investment holding company founded in 1916 by the Wallenberg family, which still controls it today. Headquartered in Stockholm, it is one of the largest investors in the Nordic region. Its portfolio consists of significant stakes in listed companies such as ABB, Atlas Copco, AstraZeneca, Ericsson, SEB and Epiroc, the wholly owned Patricia Industries with private holdings (e.g. Mölnlycke), and investments in EQT funds. Investor AB positions itself as a long-term, engaged owner that supports the growth and competitiveness of its companies, and in recent years it has ranked among Europe's best-performing investment firms.