H. C. Lothar Spaeth

Sustainable Performance Group AG is a closed-end investment fund. The company operates in the following segments: Listed Securities, Unlisted Securities, and Holding. The Listed Securities segment manages shares in listed companies that are traded on a recognized stock exchange, and for which a bid price is regularly available. The Unlisted Securities segment handles the management of shares in unlisted companies. It also grants shareholder loans and options not traded in an active market. The Holding segment holds and manages investments and related strategy, marketing, management, coordination, and financing activities. The company was founded on May 21, 1997 and is headquartered in Zurich, Switzerland.

Herrenknecht AG manufactures tunneling equipment. The company provides tunnel boring machines and vertical drilling equipment. The company was founded in 1975 and is headquartered in Schwanau, Germany.

Verlagsgruppe Georg von Holtzbrinck GmbH operates as an investment holding company with interests in publishing books, newspapers, periodicals and online media. Its customers include authors, researchers, academics, educators, librarians, and readers. The company was founded in 1971 and is headquartered in Stuttgart, Germany.