Aternus is a multi-family office founded in 2016 by the former owners of Walmark (Adam, Mariusz, and Waldemar Wałach) together with Petr Turoň and Roman Kantor. It invests its own capital directly and via funds in Marketplace, SaaS, Fintech, DeepTech, real estate, and healthcare projects, with a portfolio spanning Central Europe, the US, and beyond (e.g. Rohlik, Booksy, JET Investments, RSJ funds).