Ahlenberg Ingenieure GmbH operates an engineering office providing consulting, planning, testing, supervision and control in the fields of geotechnics, geology, hydrogeology, environmental geotechnics, legacy mining, contaminated sites, soil protection, geoinformation, land recycling, civil engineering and structural engineering. The company is based in Herdecke and is registered at the commercial register in Hagen under HRB 7854. In the 2024 financial year the company generated revenues of EUR 6,806,924.21 and a net profit of EUR 290,386.33. The balance sheet as of 31.12.2024 shows work in progress (inventories) of EUR 1,265,485.15, and in-progress orders are capitalized at cost plus appropriate administrative expenses. The company is a small company under § 267 (1) HGB and is therefore not required to publish a profit-and-loss statement.
der Betrieb eines Ingenieurbüros für Beratung, Planung, Prüfung, Überwachung und Steuerung in folgenden Fachbereichen: - Geotechnik, - Geologie, - Hydrogeologie, - Umweltgeotechnik, - Altbergbau, - Altlasten, - Bodenschutz, - Geoinformation, - Flächenrecycling, - Tiefbau, - konstruktiver Ingenieurbau.
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) Hagen Local Court, HRB 7854 (as of 31 October 2026)
| Name | Type | City |
|---|---|---|
| Ludger Körner | Geschäftsführer(in) | Schwerte |
| Thomas Mohr | Geschäftsführer(in) | Witten |
| Martin Schnorrenberger | Geschäftsführer(in) | Bönen |
| Dominik Schröer | Geschäftsführer(in) | Dortmund |
Source: German Commercial Register (Handelsregister) Hagen Local Court, HRB 7854 (as of 31 October 2026)
| Date | Contract | Value |
|---|---|---|
| 5.11.2025 | Supplier · DEGES Deutsche Einheit Fernstraßenplanungs- und -bau GmbH | — |
| 15.5.2025 | Supplier · Freiheit Emscher Entwicklungsgesellschaft mbH | 235.000 € |
| 21.3.2025 | Erschließung- Planungsleistungen zur Sanierung und Baureifmachung Supplier · Entwicklungsgesellschaft Neue Zeche Westerholt mbH | — |
| Year | Revenue | Profit | Balance | Employees |
|---|---|---|---|---|
| 2025 | small company1 | — | €3,324,305 | — |
| 2024 | €6,806,924 | €291,736 | €3,295,289 | — |
| 2023 | €5,949,688 | €205,236 | €2,831,729 | — |
| 2022 | small company1 | — | €2,425,496 | — |
| 2021 | small company1 | — | €2,034,841 | — |
| 2020 | small company1 | — | €2,072,208 | — |
| 2019 | small company1 | — | €2,161,442 | — |
| 2018 | small company1 | — | €2,248,617 | — |
| 2017 | Rohergebnis€4M2 | €126,394 | €1,694,112 | — |
| 2016 | Rohergebnis€4.2M2 | €12,561 | €1,609,196 | — |
1 Small companies are not required to publish a profit-and-loss statement (§ 326 (1) HGB). The figure shown is the statutory ceiling under § 267 HGB where the balance-sheet total makes it binding — a company may exceed at most one of the three size criteria.
2 Rohergebnis nach § 276 HGB: Umsatzerlöse abzüglich Materialaufwand bzw. Herstellungskosten. Kleine und mittelgroße Kapitalgesellschaften dürfen diese Posten zusammenfassen; die Umsatzerlöse selbst sind dann nicht veröffentlicht und liegen über dem Rohergebnis.
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Source: German Commercial Register (Handelsregister) Hagen Local Court, HRB 7854 (as of 31 October 2026)
| Cost type | Amount | Share |
|---|---|---|
| Personnel Costs | €4,070,745 | 71.7% |
| Material Costs | €1,491,373 | 26.3% |
| Depreciation | €80,826 | 1.4% |
| Interest & Similar | €30,586 | 0.5% |
