AQTON SE
Also known as AQTON, AQTON Private Equity GmbH
Bad Homburg investment holding of Stefan Quandt. Holds a stake in listed BMW AG plus Entrust, Solarwatt, Heliatek, Kiwigrid, Scope and Ecorobotix; VC/PE deals via AQTON Private Equity GmbH.
USEFUL FOR Business owners seeking a long-term partner · Co-investors
Investment holding company of Stefan Quandt in Bad Homburg. Its May 2023 Ecorobotix investment was made through AQTON Private Equity GmbH, which the release on AQTON SE's site describes as a holding company wholly owned by Stefan Quandt. Not SKion GmbH (Bad Homburg), a separate investment company listed in this directory.
Family & background
- FAMILY
- Quandt
- WEALTH ORIGIN
- Stake in BMW AG
- HEADQUARTERS
- Bad Homburg vor der Höhe, Germany
- OUTSIDE CAPITAL
- No — own capital only
Investment approach
- ROUTES
- Companies (own capital)
- STRATEGIES
- Venture capitalPrivate equityDirect investments
Overview
AQTON SE is an investment holding company owned by the businessman Stefan Quandt and registered in Bad Homburg vor der Höhe, Germany. Its website says that, as a fourth-generation entrepreneur, Stefan Quandt pursues a long-term investment approach to all his equity holdings. Its holdings page lists a stake in the listed carmaker BMW AG (automotive industry) alongside Entrust (digital security and identity protection), Solarwatt, Heliatek and Kiwigrid (photovoltaics and smart grids), the rating agency Scope and the agricultural-technology company Ecorobotix. In May 2023 AQTON Private Equity GmbH, described in the release as a holding company wholly owned by Stefan Quandt that combines venture and private-equity investments, co-led Ecorobotix's $52M (CHF 46M) funding round with Cibus Capital. Ecorobotix's Series C (USD 45 million, 2024) was also led by AQTON and Cibus Capital, according to the company's legal adviser.
Investment thesis
States that Stefan Quandt pursues a long-term investment approach to all of his equity holdings.
Holdings & investments (6)
- EcorobotixNOTABLEFood & Agriculture · since 2023
- HeliatekNOTABLEClimate & Energy
- SolarwattNOTABLEClimate & Energy
- Climate & Energy
- Software & SaaS
People
Frequently asked questions
AQTON SE is a family holding based in Bad Homburg vor der Höhe, Germany.
AQTON SE invests on behalf of the Quandt family (Stake in BMW AG).
AQTON SE invests its own capital into companies. Its stated asset mix includes venture capital, private equity and direct investments.
AQTON SE invests in Climate & Energy, Food & Agriculture and Software & SaaS.
Key people at AQTON SE include Stefan Quandt (Chairman of the Board & Executive Director) and Dr. Jörg Appelhans (Press Officer).
AQTON SE's holdings and investments include Ecorobotix, Heliatek, Solarwatt, Kiwigrid, Entrust and Scope.
The most recent publicly reported investment by AQTON SE is Ecorobotix (Series C (USD 45m, 2024), led by AQTON and Cibus Capital; disclosed 15 Oct 2025 by Niederer Kraft Frey), announced in Oct 2025.
No. AQTON SE invests its own capital and does not raise money from outside investors.