H&M Owner Stefan Persson is the richest person in Sweden with an estimated net worth of $19 billion. Here's how he built his massive fortune. Persson owns around 36 percent of Hennes & Mauritz or otherwise known as H&M. He inherited it from his father, Erling Persson, who founded the fashion company in 1947. Stefan Persson worked for H&M from 1982 until 2009 when his son, Karl-Johan took over, per Forbes.