![Theo Siegert](data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="%231b1b1b" class="bi bi-person-fill" viewBox="0 0 16 16"><path d="M3 14s-1 0-1-1 1-4 6-4 6 3 6 4-1 1-1 1zm5-6a3 3 0 1 0 0-6 3 3 0 0 0 0 6"/></svg>)
Theo Siegert
Net worth: 22 M $ as of 31/12/2025
Profile
Theo Siegert is a German businessperson who has been at the head of 6 different companies. Dr. Siegert is Chairman-Management Board at Schmalenbach Foundation, Vice President & Treasurer at Industrie-Club e.V. Düsseldorf and Managing Partner at De Haen Carstanjen & Söhne GmbH. He is also on the board of Henkel AG & Co. KGaA and E. Merck KG and Chairman-Supervisory Board for Stiftung Marktwirtschaft GmbH. In the past he was Commercial Director at Haniel Umweltschutz GmbH, Chairman-Supervisory Board for McKesson Europe AG, Member-Supervisory Board at METRO AG and Chairman-Management Board at Franz Haniel & Cie. GmbH. Theo Siegert received a doctorate, an MBA and an undergraduate degree from Ludwig-Maximilians-Universität München.
Known holdings in public companies
| Company | Date | Number of shares | Valuation | Valuation date |
|---|---|---|---|---|
Schweizerische Nationalbank
 Schweizerische Nationalbank Major BanksFinance Provides commercial banking services 5.01% | 31/12/2024 | 5,010 ( 5.01% ) | 22 M $ | 31/12/2025 |
Theo Siegert active positions
| Companies | Position | Start |
|---|---|---|
E. Merck KG
 E. Merck KG Pharmaceuticals: MajorHealth Technology Operates as a holding company with interests in pharmaceutical preparations | Director/Board Member | 07/02/2014 |
De Haen Carstanjen & Söhne GmbH | Corporate Officer/Principal | 14/09/2010 |
Industrie-Club e.V. Düsseldorf
 Industrie-Club e.V. Düsseldorf Operates industrial club | Treasurer | - |
Schmalenbach Foundation | Chief Executive Officer | - |
Stiftung Marktwirtschaft GmbH
 Stiftung Marktwirtschaft GmbH Operates as a foundation or endowment | Chairman | - |
Former positions of Theo Siegert
| Companies | Position | End |
|---|---|---|
| MERCK KGAA | Director/Board Member | 26/04/2019 |
| EON SE | Director/Board Member | 09/05/2018 |
| DEUTSCHE BANK AG | Director/Board Member | 31/05/2012 |
ERGO Group AG
 ERGO Group AG Multi-Line InsuranceFinance Provides life, health and property insurance policies, pensions & investment services | Director/Board Member | 12/05/2010 |
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Training of Theo Siegert
Experiences
Positions held
Connections
1st degree connections
1st degree companies
Male
Female
Members of the board
Executives
Linked companies
| Private companies | 16 |
|---|---|
Deutsche Bank AG
 Deutsche Bank AG Investment Banks/BrokersFinance Provides private, investment & corporate banking and asset management services | Finance |
Merck KGaA
 Merck KGaA Pharmaceuticals: MajorHealth Technology Engages in the manufacturing of pharmaceutical and chemical products | Health Technology |
Henkel AG & Co. KGaA
 Henkel AG & Co. KGaA Industrial SpecialtiesProcess Industries Manufactures and sells adhesives, sealants, laundry, home & hair care products | Process Industries |
E.ON SE
 E.ON SE Electric UtilitiesUtilities Provides power and gas distribution networks and related services | Utilities |
ERGO Group AG
ERGO Group AG Multi-Line InsuranceFinance Provides life, health and property insurance policies, pensions & investment services | Finance |
METRO AG /Old/
 METRO AG /Old/ Food RetailRetail Trade Owns, operates, and manages chain of supermarkets | Retail Trade |
McKesson Europe AG
 McKesson Europe AG Medical DistributorsDistribution Services Provides logistics and services to the pharmaceutical and healthcare sectors | Distribution Services |
De Haen Carstanjen & Söhne GmbH | |
Franz Haniel & Cie. GmbH
 Franz Haniel & Cie. GmbH Investment ManagersFinance Haniel is an active manager that seeks to invest in diversified established sustainable companies, but it also provides growth and earlier stage capital for companies in development stages. | Finance |
DKSH Holding Ltd.
 DKSH Holding Ltd. Medical DistributorsDistribution Services Operates as a holding company which engages in the consumer goods, healthcare, performance materials and technology activities | Distribution Services |
Ludwig-Maximilians-Universität München
 Ludwig-Maximilians-Universität München Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
E. Merck KG
E. Merck KG Pharmaceuticals: MajorHealth Technology Operates as a holding company with interests in pharmaceutical preparations | Health Technology |
Industrie-Club e.V. Düsseldorf
Industrie-Club e.V. Düsseldorf Operates industrial club | |
Schmalenbach Foundation | |
Stiftung Marktwirtschaft GmbH
Stiftung Marktwirtschaft GmbH Operates as a foundation or endowment | |
Haniel Umweltschutz GmbH |
- Stock Market
- Insiders
- Theo Siegert
