About Us
We are investors and partners in leading Czech and international investment funds. We select investments with high return potential while also considering their positive social contribution and impact. What brought us together was successful entrepreneurship, shared values, and a deep connection to the region of Cieszyn Silesia, where our families come from.


In 1990, we founded Walmark, a company that grew from scratch into a business with 900 employees and revenues exceeding EUR 100 million. With branches in 8 countries and exports to 45 nations, we became the market leader for dietary supplements and over-the-counter medicines (including the brands Prostenal, Proenzi, and Marťánci) in Central and Eastern Europe. Through our beverages division and Relax juices, we became number one on the Czech and Slovak markets, successfully selling the brand in 2004.
Adam, Mariusz, and Waldemar received the EY Entrepreneur of the Year award in the Czech Republic and participated in the global finals of this prestigious competition in 2011.
At the end of 2015, we sold Walmark to the London-based investment group MidEuropa. In 2016, we founded Aternus Family Office, where we fully leverage our extensive experience in building and managing international companies.
Aternus is a multi-family office. It brings together families connected by their entrepreneurial background and involvement in Walmark, as well as by shared values and a strong bond with the Cieszyn Silesia region, where the founders Adam, Mariusz and Waldemar Wałach, Petr Turoň, and Roman Kantor originate from.
”Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.”
Our team
Waldemar Wałach
Partner
Adam Wałach
Partner
Mariusz Wałach
Partner
Roman Kantor
Partner
Petr Turoň
Managing Partner
Miloš Drdák
CFO
Zdeněk Podlipný
Chief Investment Officer
Daniela Ehrhardtová
Financial Specialist
Žaneta Twardziková
Office Manager
OUR APPROACH
We manage and invest the founders’ wealth with purpose, focusing on areas where we see the greatest potential for profit and return. When selecting investments, we also take into account their positive societal contributions and impact. Our approach is grounded in the experience gained from building both local and global companies.
Our current portfolio consists primarily of investments in private equity, real estate, and venture capital funds, focusing on technology, marketplaces, SaaS, fintech, and deep tech. A smaller portion includes stocks and bonds.
We emphasize the idea, strategy, communication, and above all, the quality of the individuals behind the funds or individual projects. For truly exceptional opportunities with great potential, we opt for co-investments in collaboration with PE and VC funds. We help these carefully selected projects grow not only through capital investment but also by sharing our knowledge and expertise in HR, sales, and marketing, and by supporting them in developing a successful business strategy.
Some of our investments

Docplanner
Portal for arranging patient appointments and online services for doctors (PL, TR, IT, ES, BR, MX)

Enern Tech 2, Enern Tech 3, Enern Tech 4
Investment funds in SaaS and IT technologies (EU, USA)

Potysz Health Fund
Investment fund for the establishment of a network of outpatient clinics for district doctors, paediatricians, allergists and rehabilitation (CZ, SK)

JET Investments
Investment funds in industrial companies (CZ, DE, PL)

RSJ Logistic Investments
Fund in the field of investments in logistics complexes (CZ)
RSJ Development III
Fund - construction of flats in Prague
RSJ Development V
Investment fund - construction of flats in Prague
LAND II
Investment Fund - purchase and sale of agricultural land

Palác Karlín Praha
Development in office space

Booksy
Online appointment booking app for beauty and wellness (US, PL, UK, BR)

Blueground
Online application for searching medium-term rentals of furnished apartments (200 cities worldwide)

Westfield
Residential project in Arad (RO)

Daytrip
Private car transfer with local guide (Europe, Asia, USA)

Dirlango
Investment fund-investing in global mid-sized internet and technology companies

Rohlik.cz
is the largest Czech online grocery store (CZ, HU, A, D)

Inovo
Investment fund in high-growth SaaS and IT technology startups in CEE

The Form Varšava
Development in the field of office spaces

Amino Collective
Health and Biotechnology Investment Fund

OTB Ventures
Investment fund focused on AI, DeepTech, CyberSecurity, SpaceTech and FinTech.

Art of Finance
Vault – Equity investment fund
Emart – Hedge fund based on currency pairs
Philanthropy
We have been involved in philanthropy since the early days of Walmark, encouraging generosity among our employees. We support charitable and Christian organizations operating across Central and Eastern Europe, as well as regional projects and cultural activities of the Polish minority in Cieszyn Silesia. This is made possible through our connection with the 3WFoundation, established in 2022 by the Wałach brothers together and their families
CONTACT
Žaneta Twardziková
Office Manager
+420 725 685 994
nám. Svobody 527 / 739 61 Třinec / 6th floor
Czech Republic