lead were also found at abnormally high concentrations. Hydro has since claimed that while some unauthorized spills had happened, their own and independent reports showed no environmental pollution of the river but only a small change in pH. Chief Executive Officers 1905–1917 Sam Eyde 1918–1926 Harald Bjerke 1926–1941 Axel Aubert 1941–1956 Bjarne Eriksen 1956–1967 Rolf Østbye 1967–1977 Johan B. Holte 1977–1984 Odd Narud 1984–1991 Torvild Aakvaag 1991–2001 Egil Myklebust 2001–2009 Eivind Reiten 2009–2019 Svein Richard Brandtzæg 2019– Hilde Merete Aasheim References External links Electric power companies of Norway Chemical companies established in 1905 Companies based in Oslo Economy of Houston Aluminium companies of Norway Companies listed on the Oslo Stock Exchange Multinational companies headquartered in Norway Norwegian brands Norwegian companies established in 1905