[4] Halfdan Magnus Mustad married Edle Smith in 1899, and the couple had several children.
[7] When Hans Mustad died in 1918, his sons inherited the largest industrial company in Norway, with 2,000 domestic employees as well as several factories abroad.
The expansion continued after 1918, and the company eventually became the world's largest producer of fish hooks.
[7] For his work, Mustad was decorated with the Royal Norwegian Order of St. Olav in 1936, but he left as co-owner in 1959.
[5] After his death, O. Mustad & Søn was converted to a limited company (1970) and split into different branches (1977 and 1997).