Yrjö Juhani Pekkala

Suomen Messut Osuuskunta organizes trade and industry fairs, exhibitions, meetings, and congresses. The company was founded on October 19, 1919 and is headquartered in Helsinki, Finland.

Gummerus Kustannus Oy operates as a book publishing house. It offers domestic and translated fiction, non-fiction, and reference books, as well as dictionaries and language study books. The company was founded by Kaarle Jaakko Gummerus in 1872 and is headquartered in Helsinki, Finland.

Yleisradio Oy provides public broadcasting services. It operates four national television channels, six radio channels, three digital radio services, and twenty four regional radio stations. The company was founded on May 29, 1926 and it is headquartered in Helsinki, Finland.

Gummerus Oy is a holding company, which engages in the book publishing business. The company was founded on January 17, 1907 and is headquartered in Jyvaskyla, Finland.