The story
The original company was founded in 1890 as Sjöförsäkringsaktiebolaget Öresund. In 1956 the company was reorganised and AB Sjö-Öresund became the main company in a group of insurance companies. In 1961 these subsidiaries were sold to Skandia. Skandia paid in cash and in shares. Thus, the company became an investment company and was renamed Investment AB Öresund. It was listed on the stock exchange in 1962.
From Wikipedia’s article on Investment AB Öresund, shared under CC BY-SA 4.0.4