Haaken Larpent Mathiesen (7 April 1858 – 5 October 1930) was a Norwegian landowner and businessperson in the forestry sector.
He was born in Christiania as the son of landowner Haaken C. Mathiesen (1827–1913) and his wife Anna Sophie Josephine Larpent (1833–1863).
Mathiesen intended to become a military officer, but as his older brother died in 1875, it fell upon him to inherit the family company.
The company was dissolved in 1893, though a small remnant existed, managed by Haaken Mathiesen's younger half-brother Arthur.
He had to cope with debt problems,[4] which came to be as a part of the general economic hardships of the World War I and the interwar period.