Career
Wallenberg became Vice CEO of the Stockholms Enskilda Bank and a member of its board of directors in 1920 eventually becoming its CEO on 31 March 1927. He was CEO until 1946 and then vice chairman of the board from 1946 to 1950 and chairman from 1950 to 1969.
Wallenberg was in the early 1930s a board member of Vikmanshytte bruks AB, AB Diligentia, Stockholms Rederi AB Svea, Stockholm-Västerås-Bergslagens Nya Jernvägsaktiebolag, Göta kanalbolag AB, Investor AB, Wedevågs bruks AB, Svenska obligationskreditaktiebolaget AB, International Bk te in Amsterdam and Società Esercizi Telefonici. In the late 1930s, Wallenberg was chairman of the board of Svenska Tändsticks AB and board member of AB Diligentia, AB Obligations-Intressenter, AB Separator, AB Svenska Kullagerfabriken (SKF), Göta kanalbolag, Stockholm-Västerås-Bergslagens Nya Jernvägsaktiebolag, August Stenman AB, Svenska Personal-Pensionskassan, Svenska obligationskreditaktiebolaget AB, Wikmanshytte Bruks AB and Kreutoll Realization Co. He was also voting trustee in the International Match Realization Co. Ltd and was on the board of the National Institute of Economic Research (from 1937) and of the Maritime Museum in Stockholm (from 1939).
Wallenberg was in the mid-1940s chairman of the board of Svenska Tändsticks AB, Svenska Ostasiatiska Kompaniet, AB International Harvester Co. and August Stenman AB. Wallenberg was vice chairman of the board of the Swedish Bankers' Association (Svenska Bankföreningen), Svenska Personal-Pensionskassan and Stora Kopparbergs Bergslags AB. Wallenberg was a board member of AB Diligentia, AB Obligations-Intressenter, AB Separator, AB Svenska Kullagerfabriken, Stockholm-Västerås-Bergslagens Nya Jernvägsaktiebolag, August Stenman AB, Stora Kopparbergs Bergslags AB, Svenska obligationskreditaktiebolaget AB, Wikmanshytte Bruks AB, Kreutoll Realization Co. Furthermore, Wallenberg was board member of Försäkrings AB Skandia-Freja, Göta Kanalbolag, Kopparfors AB and Orkla Grube AB. He was also a member of the government commission for trade agreements with Germany from 1934 to 1944.
Wallenberg was in the mid-1950s chairman of the board of Förvaltnings AB Providentia, AB Investor, AB International Harvester Co., Kemi-Intressen AB, Nordiska Kompaniet (NK), Stora Kopparbergs Bergslags AB, Svenska Diamantbergborrnings AB, AB Svenska Kullagerfabriken, AB Svenska Ostasiatiska Kompaniet, Svenska Tändsticks AB and Wifstavarfs AB, the Royal Swedish Yacht Club (KSSS). He was vice chairman of the board of Försäkrings AB Skandia-Freja, Göta kanalbolag and Orkla Gruve AB. Wallenberg was board member of AB Iggesunds Bruk, Kopparfors AB, AB Separator, August Stenman AB, Wikmanshytte Bruks AB, the Nobel Foundation and the Knut and Alice Wallenberg Foundation.
Wallenberg was in the mid-1960s chairman of the board of Förvaltnings AB Providentia, AB Investor, AB International Harvester Co., Kemi-Intressen AB, Koppartrans olje AB, Orkla Grube AB, AB Separator, Stora Kopparbergs Bergslags AB, AB Svenska Kullagerfabriken, AB Svenska Ostasiatiska Kompaniet, Svenska Tändsticks AB, Wifstavarfs AB and AB Astra from 1957. In the late 1960s, Wallenberg was also chairman of the board of Bergvik & Ala AB. He was a board member of AB Iggesunds Bruk, Nordiska Kompaniet (NK), Skandia, Göta kanalbolag, Wikmanshytte Bruks AB, the Nobel Foundation (from 1952), the Knut and Alice Wallenberg Foundation and King Gustaf V's Jubilee Fund. Wallenberg was treasurer of the Cancer Society in Stockholm. In the late 1960s, Wallenberg became chairman of the board of the Knut and Alice Wallenberg Foundation.
Wallenberg was appointed by the Stockholm School of Economics Association as a member of the Stockholm School of Economics Board of Directors which is the school's highest executive body, where he was treasurer from 1931 to 1955 and vice chairman from 1938 to 1965. He was chairman of the school's deliberative body from 1943 to 1968.