Mattias Wachtmeister sold 1.9 million shares in audio technology company Sound Dimension on 8 September, where he is a board member. The shares were sold at a price of SEK 0.68 per share, in a transaction worth SEK 1.3 million. The transaction was carried out outside a trading venue. This is shown by the Swedish Financial Supervisory Authority's insider register.Wachtmeister subsequently owns 2.14 million shares in the company, according to the Holdings ownership service.