OEM's shares were quoted on the Stockholm Stock Exchange's OTC List in December 1983 and since then have shown good growth in price. An investor who purchased 100 shares in OEM for SEK 12,500 at the initial public offering would have a holding of 21,600 shares worth SEK 4,004,640 on 31 December 2021. OEM's shares were transferred to the O List in 2000 and its shares have been trading on the NASDAQ Nordic Small Cap market since 2006. The shares were transferred to the NASDAQ Nordic Mid Cap market in 2014.