Investor AB is an investment company. It operates through the following segments: Listed Companies, Patricia Industries and Investments in EQT. Listed Companies segment consists of listed holdings and majority-owned operating subsidiaries. The Patricia Industries segment includes the wholly-owned subsidiaries, Three Scandinavia and the former IGC portfolio and all other financial investments, except EQT and Investor's trading portfolio. The Investments in EQT segment engages in investments in its funds. The company was founded in 1916 and is headquartered in Stockholm, Sweden.