She is the daughter of Hugo Stenbeck, the founder of Investment AB Kinnevik, and the sister of Jan Stenbeck who took over after their father. She graduated from Stockholm School of Economics and later married Bertil af Ugglas who became the Party Secretary of the Moderate Party. She fought a bitter feud with her brother over the family fortune and subsequently withdrew from her brother and Kinnevik.
She was an editorial writer at Svenska Dagbladet for five years and sat in the Swedish Riksdag between 1974 and 1995. After the election victory in 1991, Margaretha af Ugglas became Sweden's second female Minister for Foreign Affairs. Her term included the finalisation of the negotiations leading up to Sweden's entry into the E.U.
In 1992, together with 9 other Ministers of Foreign Affairs from the Baltic Sea area, and an EU commissioner, she founded the Council of the Baltic Sea States (CBSS) and the EuroFaculty. The Moderate Party lost the 1994 election and she was elected to the European Parliament in 1995.
She is a former Chairman of the Jarl Hjalmarson Foundation.
- "Margaretha af Ugglas (M)". riksdagen.se (in Swedish). The Swedish Parliament. Retrieved 2010-05-10.
- "Mrs Margaretha af UGGLAS". assembly.coe.int. Parliamentary Assembly of the Council of Europe. Retrieved 2010-05-10.
- "Your MEPs: Margaretha af UGGLAS". European Parliament. Retrieved 16 June 2015.
- Kristensen, Gustav N. 2010. Born into a Dream. EuroFaculty and the Council of the Baltic Sea States. Berliner Wissentshafts-Verlag; ISBN 978-3-8305-1769-6.
|Swedish Minister for Foreign Affairs
|Chairperson-in-Office of the OSCE