Dagens industri has listed so-called "perpetual motion machines", i.e. companies that almost always beat the index.

The list is based on the development of the last 20 years and at the top is the investment company Latour, which has been better than the index for 17 years.

Its colleagues Bure and Investor also make the list, having outperformed the index in 13 and 16 of the last 20 years respectively.

Investment companies thus stand out as a category that usually outperforms the index.

Other sectors that also have a high degree of outperforming companies include niche software (Fortnox, Vitec), real estate (Atrium Ljungberg, Fastpartner and Wallenstam), technology consultants (Sweco, Rejlers and Afry), and technology and components (Addtech, Bergman & Beving, Beijer Ref, Lagercrantz and OEM).

In addition, companies such as Axfood, AQ, Atlas Copco, Beijer Ref, Biogaia, Lundin Mining, Bilia, Axfood, Xano, Nibe and VBG are also on the list.

Di notes that common denominators for most of the companies are that they are lightly capitalized, have rich acquisition histories and are full of founders and company builders.