Gustaf Douglas

In 1963, he married Elisabeth von Essen, the daughter of Baron Eric von Essen and Louise (née Tamm). Gustaf and Elisabeth Douglas have two children, Carl and Eric. Both serve at different positions within the family group of companies. The Douglas family live at Rydboholm Castle outside Åkersberga. One of his younger sisters is Rosita Spencer-Churchill, Duchess of Marlborough third (and former) wife of John Spencer-Churchill, 11th Duke of Marlborough. Gustaf’s other sister, Princess Elisabeth, Duchess in Bavaria is married to Prince Max, Duke in Bavaria.

After an M.B.A. from Harvard Business School in 1964, he worked in Sweden and was CEO of the newspapers Dagens Nyheter and Expressen between 1973 and 1980. After that he founded his company Investment AB Latour in 1984, through which he now controls security firm Securitas AB, the world-leading lock producer Assa Abloy and more. He formed a partnership with fellow businessman Melker Schörling, who also controls a significant amount of Securitas shares and serves as the company's chairman. He is the eleventh wealthiest person in Sweden, according to Forbes magazine, with an estimated net worth of around US$3.2 billion as of March 2013.

In 2001 Douglas was elected to the board of the Moderate Party. He has a long history of political involvement, having campaigned in his teens for what was the predecessor of the Moderates. Douglas was, however, for a time active within the Liberal People's Party. Now he is known as a rather Conservative Moderate with a big interest in education policy.

In May 2013, Douglas acquired the only known example of the 1855 Treskilling Yellow postage stamp, one of the rarest in the world, in a private sale.

He is a fellow of the Royal Philatelic Society London (FRPSL) and in 2018 was appointed to the Roll of Distinguished Philatelists.