TenneT Offshore 9. Beteiligungsgesellschaft mbH is a certified network operator responsible for the construction, maintenance, and upkeep, as well as the subsequent decommissioning of the offshore grid connection systems DolWin2 and HelWin2, in order to feed wind energy from offshore wind farms into the German power transmission grid.
die Konstruktion, der Betrieb und/oder die Instandhaltung von Offshore-Netzanbindungen.
Converted using the official Destatis and Eurostat correspondence tables; ISIC Rev. 4 is the United Nations' international industry classification.
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Source: German Commercial Register (Handelsregister) Bayreuth Local Court, HRB 5579 (as of 1 November 2026)
| Name | Type | City |
|---|---|---|
| Stefan Bönig | Geschäftsführer(in) | Isernhagen |
| Thorsten Höppner | Geschäftsführer(in) | Bayreuth |
Source: German Commercial Register (Handelsregister) Bayreuth Local Court, HRB 5579 (as of 1 November 2026)
| Date | Event Type | Event |
|---|---|---|
| 15.01.2025 | Gesellschaftsvertrag amended | Gesellschaftsvertrag |
| 10.05.2013 | Company Name Change | TenneT Offshore 9. Beteiligungsgesellschaft mbH |
| 24.04.2013 | Business Purpose Update | die Konstruktion, der Betrieb und/oder die Instandhaltung von OffshoreNetzanbindungen. |
| Date | Type | Change | Total Capital |
|---|---|---|---|
| 23.07.2012 | Share Capital Set | — | 25.000 € |
| Date | Contract | Value |
|---|---|---|
| 12.5.2026 | Contracting authority · Emdion GmbH | 15.000.000 € |
| 8.5.2026 | Contracting authority · Bilfinger Life Science Automation GmbH | — |
| 10.10.2025 | HelWin2 OT-Upgrade (HW2-OTUP) - HMI-Nebensysteme (HMI-Aux) Contracting authority | — |
Source: German Commercial Register (Handelsregister) Bayreuth Local Court, HRB 5579 (as of 1 November 2026)
| Year | Revenue | Profit | Balance | Employees |
|---|---|---|---|---|
| 2025 | €189,400,000 | €32,400,000 | €884,000,000 | — |
| 2024 | €193,900,000 | €23,600,000 | €991,200,000 | 0 |
| 2023 | €221,400,000 | €41,000,000 | €1,091,200,000 | 0 |
| 2022 | €250,000,000 | €43,000,000 | €1,324,500,000 | 0 |
| 2021 | €162,400,000 | €0 | €1,387,400,000 | 0 |
| 2020 | €216,600,000 | €47,500,000 | €1,378,500,000 | 0 |
| 2019 | €242,300,000 | €54,700,000 | €1,483,700,000 | 0 |
| 2018 | €239,400,000 | €48,600,000 | €1,542,100,000 | 0 |
| 2017 | €248,784,000 | €61,979,000 | €1,632,502,000 | 0 |
| 2016 | €257,209,000 | €86,682,000 | €1,660,290,000 | 0 |
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Source: German Commercial Register (Handelsregister) Bayreuth Local Court, HRB 5579 (as of 1 November 2026)
| Cost type | Amount | Share |
|---|---|---|
| Material Costs | €46,500,000 | 33.7% |
| Depreciation | €88,000,000 | 63.8% |
| Interest & Similar | €3,400,000 | 2.5% |
