Madeleine Olsson Eriksson Net Worth

Madeleine Olsson Eriksson has an estimated net worth of $1.2 billion, according to Forbes Real-Time Billionaires, Madeleine Olsson Eriksson profile (figures as of October 20, 2026). That is down from a peak of $2.5 billion.

Madeleine Olsson Eriksson is a Swedish gynecologist, businesswoman and philanthropist, and a part owner of Stena Sphere, the privately held Swedish conglomerate founded by her father. She was born on 25 August 1945 in Gothenburg, the oldest child and only daughter of Sten Allan Olsson. Her brothers are Dan, Stefan and Christofer.

She chose medicine over the family business. After a bachelor's degree from Lund, she studied medicine at the Karolinska Institute in Stockholm and qualified as a doctor in 1981, becoming the first in her family to go to college. She worked in Gotland among other places, and since the 1990s she has practiced at Avenykliniken in central Gothenburg, a clinic she owns with two partners.

In 1996 she became chair of Sten A Olsson's Foundation for Research and Culture, which supports cultural figures, institutions and research in western Sweden, and in 2007 the University of Gothenburg made her an honorary doctor. Since 1982 she has been married to Bert-Åke Eriksson, a manager active in Stena Sphere. Their children are Gustav, born in 1983, and Marie, born in 1985.

How Madeleine Olsson Eriksson got her money

Her father founded Stena in 1939 as a trading company. It grew into Stena Sphere, with interests in cruising, shipping, offshore drilling, property and metal recycling. Her brother Dan took over in 1983 and now owns 51% of the company. Over the decades the group has stayed in the hands of the Olsson family, with operations spread across several industries.

Madeleine owns 12.5% of Stena, while her brother Stefan owns 24.5%. Her children, Gustav and Marie, each own 6% and sit on different boards within the group. Since Stena Sphere is private, her figure is based on Forbes estimates of the value of her stake in the family conglomerate. Her stake makes her one of the few Swedish billionaires who has also built a full professional career outside the family business.

How Forbes has valued Madeleine Olsson Eriksson

Forbes valued her at $2.5 billion in 2014. Her figure fell to $1.9 billion in 2015, 2016 and 2017, then to $1.5 billion in 2018 and $1.1 billion in 2019 and 2021.

She returned to the list at $1.3 billion in 2026. As of October 20, 2026, the Forbes real-time billionaires tracker showed $1.2 billion. Back in 2012 she was ranked 22nd among Sweden's billionaires and was the country's fifth richest woman.