![Johannes Ringel](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>)
The former Chairman of Portigon AG, Johannes Ringel, has served as a member of the supervisory boards for TUI AG, RUETGERS Chemicals AG, STEAG GmbH, RWE Energy AG, Hüttenwerke Krupp Mannesmann GmbH, and thyssenkrupp Steel Europe AG.
| Unternehmen | Position | Ende |
|---|---|---|
STEAG GmbH
 STEAG GmbH Alternative Power GenerationUtilities Engages in implementing photovoltaics, wind and hydrogen projects for the decarbonization of industry | Direktor/Vorstandsmitglied | 03.04.2008 |
Portigon AG
 Portigon AG Regional BanksFinance Provides banking services | Vorsitzender | 12.01.2004 |
thyssenkrupp Steel Europe AG
 thyssenkrupp Steel Europe AG SteelNon-Energy Minerals Produces and supplies flat steel products | Direktor/Vorstandsmitglied | - |
RWE Energy AG
 RWE Energy AG Gas DistributorsUtilities Distributes gas and electricity | Direktor/Vorstandsmitglied | - |
RUETGERS Chemicals AG
 RUETGERS Chemicals AG Chemicals: Major DiversifiedProcess Industries Produces tar chemicals and supplies raw materials to the aluminum and steel industries | Direktor/Vorstandsmitglied | - |
Aktive
Inaktive
Börsennotierte Unternehmen
Private Unternehmen
| Private Unternehmen | 7 |
|---|---|
Portigon AG
Portigon AG Regional BanksFinance Provides banking services | Finance |
TUI AG
 TUI AG Other Consumer ServicesConsumer Services Provides tour, hotel and resort & cruise services | Consumer Services |
RUETGERS Chemicals AG
RUETGERS Chemicals AG Chemicals: Major DiversifiedProcess Industries Produces tar chemicals and supplies raw materials to the aluminum and steel industries | Process Industries |
STEAG GmbH
STEAG GmbH Alternative Power GenerationUtilities Engages in implementing photovoltaics, wind and hydrogen projects for the decarbonization of industry | Utilities |
RWE Energy AG
RWE Energy AG Gas DistributorsUtilities Distributes gas and electricity | Utilities |
Hüttenwerke Krupp Mannesmann GmbH
 Hüttenwerke Krupp Mannesmann GmbH SteelNon-Energy Minerals Manufactures steel and semi-finished products | Non-Energy Minerals |
thyssenkrupp Steel Europe AG
thyssenkrupp Steel Europe AG SteelNon-Energy Minerals Produces and supplies flat steel products | Non-Energy Minerals |
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