# Rethmann Gruppe

Rethmann Gruppe is a Single Family Office based in Selm, Germany.

## Overview

- **Organization type:** Single Family Office
- **Headquarters:** Selm, Germany
- **Region:** Europe
- **Address:** Norbert-Rethmann-Platz 1, 59379 Selm, Germany
- **Founded:** 1934
- **Assets under management:** Undisclosed
- **Website:** rethmann-gruppe.de
- **LinkedIn:** https://www.linkedin.com/company/remondis-gruppe

## Regulatory record

- **Reports private funds:** No

## About

Rethmann Gruppe was founded in 1934 in Selm, Germany, by Josef Rethmann as a local haulage and ash-disposal business. Norbert Rethmann later expanded the holdings into the four independent operating companies that exist today. The family office manages governance, capital allocation and philanthropy for the Rethmann family across these platforms. The portfolio centers on recycling and water services through Remondis, global logistics through Rhenus, sustainable food and industrial products through SARIA, and public transport through Transdev. Investments take the form of direct ownership and strategic co-investments rather than fund commitments. The groups operate across Europe with Transdev active in 19 countries. Confirmed holdings include the full Remondis, Rhenus and SARIA platforms plus the controlling interest in Transdev. The family maintains a board of four members drawn from the Rethmann line. Klemens Rethmann and Ludger Rethmann serve on the executive board while Martin Rethmann chairs the supervisory board. July 2025: Rethmann Gruppe acquired an additional 32 percent stake in Transdev from Caisse des Dépôts, increasing its ownership. Adjacent vehicles include the family foundation Stiftung der Deutschen Lions. The architecture differs from typical single-family offices because the same family members who sit on the holding-company board also chair the operating subsidiaries. This direct overlap between ownership, governance and management reduces layers between capital decisions and industrial execution.

## Sectors

- Circular Economy
- Mobility & Transportation
- Supply Chain & Logistics

## People

- Klemens Rethmann — Speaker of the Board
- Ludger Rethmann — Board Member
- Martin Rethmann — Chairman of the Supervisory Board
- Norbert Rethmann — Honorary Chairman of the Supervisory Board

## Questions

### Who runs investment decisions at Rethmann Gruppe?

Klemens Rethmann and Ludger Rethmann sit on the executive board. Martin Rethmann chairs the supervisory board. All three are family members.

### Does Rethmann Gruppe participate in fund commitments or only direct deals?

The office deploys through direct ownership of the four operating groups and through strategic stakes such as the position in Transdev.

### What investment stages does Rethmann Gruppe typically target?

The firm focuses on mature industrial platforms in recycling, logistics and mobility rather than early-stage venture or growth equity.

### How is Rethmann Gruppe related to Transdev?

Rethmann Gruppe holds a controlling stake in Transdev and completed the purchase of an additional 32 percent from Caisse des Dépôts in July 2025.

### Does Rethmann Gruppe maintain philanthropic structures?

The family supports Stiftung der Deutschen Lions. Norbert Rethmann has also been associated with Lions Club Parchim.

### What is Rethmann Gruppe's known posture on co-investments alongside external GPs?

The office has not disclosed participation in external fund co-investments. Capital remains deployed inside the family-controlled operating companies.

## Related profiles

- [Resona](https://altss.com/profile/resona)
- [Reto Dora](https://altss.com/profile/reto-dora)

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Last updated: 2026-08-10T15:54:10.904Z

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