SIR Service GmbH
SIR Service GmbH is a German private limited company (GmbH) registered in the commercial register (Handelsregister) at the Amtsgericht Siegen under number HRB 4879. The company was registered on 18 November 2003 and its current status in the register is active. Its registered address is Birlenbacher Str. 15e, 57078 Siegen, Germany.
The corporate purpose of SIR Service GmbH is the acquisition and management of shareholdings and the assumption of personal liability and management in commercial companies. In practice, SIR Service GmbH acts as the personally liable general partner (Komplementaerin) of SIR Industrial Services GmbH & Co. KG, a Siegen-based industrial services company registered at the same address. Through this role, SIR Service GmbH holds unlimited liability for and manages the affairs of SIR Industrial Services GmbH & Co. KG, which provides engineering services and the maintenance and cleaning of industrial plants, including the control and upkeep of oil and grease lubrication systems and the suction cleaning of crane and furnace systems in steelworks, foundries and industrial plants, as well as hall and facility cleaning for industrial manufacturing sites. That operating business serves customers from locations in Siegen and Wetzlar.
SIR Service GmbH itself is a holding and management vehicle rather than a customer-facing operating business, and its share capital is EUR 26,000. It is not listed on any stock exchange and no ticker symbol applies. No independently reported company-level revenue or employee figures for SIR Service GmbH were located in public sources at the time of research.
- Company fundamentals
- Corporate linkage & group structures
- Digitized company financials
- Firmographics — websites, social profiles, revenue and employee estimates
Shareholders
1
SIR Service GmbH has one disclosed shareholder on record: Dr. Krumbholz GmbH Wirtschaftspruefungsgesellschaft, a company registered in Erkrath, Germany under HRB 21171 at the Amtsgericht Wuppertal. This shareholder holds 100% of the company’s EUR 26,000 share capital, corresponding to one ordinary share, as a direct holding. The shareholding was last verified on 4 September 2026. No other shareholders are disclosed, and the available data indicates full disclosure of a single-shareholder structure typical of a GmbH holding vehicle.
### Ultimate beneficial ownership
The disclosed shareholder, Dr. Krumbholz GmbH Wirtschaftspruefungsgesellschaft, is itself a corporate entity (an audit and accounting firm) rather than a natural person. No further ownership chain linking this shareholder to an individual ultimate beneficial owner was verified from authoritative sources, so no individual UBO is reported here.
### Data availability
Disclosure is assessed as Full for the direct shareholder level: a single shareholder and its 100% holding are identified from German commercial register-linked data. No natural-person UBO information is independently confirmed.
### Sources
– Handelsregister (German Commercial Register), via registry-linked company data, retrieved 2026-09-16
– Northdata company record for SIR Service GmbH, https://www.northdata.com/SIR%20Service%20GmbH,%20Siegen/HRB%204879, retrieved 2026-09-16
– Northdata company record for Dr. Krumbholz GmbH Wirtschaftspruefungsgesellschaft, https://www.northdata.de/Dr%C2%B7%20Krumbholz%20GmbH%20Wirtschaftspr%C3%BCfungsgesellschaft,%20Erkrath/Amtsgericht%20Wuppertal%20HRB%2021171, retrieved 2026-09-16
| Shareholder | Type | Holding | Source Document |
|---|---|---|---|
| Dr. Krumbholz GmbH Wirtschaftspru00fcfungsgesellschaft | 100% | Handelsregister (Commercial Register) |
Officers
3
SIR Service GmbH currently discloses two active managing directors (Geschaeftsfuehrer): Jonas Benedikt Maximilian Dicke and Carsten Achenbach. One former managing director, Leopold Schladofsky, is also on record as resigned. Carsten Achenbach was appointed on 25 January 2013, the same date on which Leopold Schladofsky’s appointment ended. Jonas Benedikt Maximilian Dicke’s appointment was most recently confirmed in a register filing dated 27 March 2024. All three individuals hold or held the single legal role of managing director; the underlying register data does not distinguish a separate occupation field. Nationality is not disclosed for any of the three individuals in the available register-linked data, consistent with standard German commercial register practice, which does not routinely publish directors’ nationality.
### Recent officer changes
– Appointment: Jonas Benedikt Maximilian Dicke as Managing Director, confirmed 27 March 2024 (source: Northdata/Handelsregister-linked record)
– Appointment: Carsten Achenbach as Managing Director, effective 25 January 2013 (source: Handelsregister-linked company data)
– Resignation: Leopold Schladofsky as Managing Director, effective 25 January 2013 (source: Handelsregister-linked company data)
### Data availability
Current and historical managing-director appointments are available via German commercial register-linked data, including appointment and resignation dates. Nationality and country of residence are not publicly disclosed for company officers under German Handelsregister practice, and correspondence addresses reported for these officers are not shown.
### Sources
– Handelsregister (German Commercial Register), via registry-linked company data, retrieved 2026-09-16
– Northdata company record for SIR Service GmbH, https://www.northdata.com/SIR%20Service%20GmbH,%20Siegen/HRB%204879, retrieved 2026-09-16
Group Structure
SIR Service GmbH is not an independent company. It is wholly owned by Dr. Krumbholz GmbH Wirtschaftspruefungsgesellschaft (Erkrath, Germany, HRB 21171, Amtsgericht Wuppertal), which is identified as its immediate and, on available evidence, ultimate parent, holding 100% of its share capital. The same parent also holds Schwarte Holding GmbH (Siegen, HRB 13093), which in turn holds Schwarte Gesellschaft mit beschraenkter Haftung (Siegen, HRB 6771), making these two entities sister companies to SIR Service GmbH under the common parent. Separately, SIR Service GmbH itself acts as the personally liable general partner (Komplementaerin) of SIR Industrial Services GmbH & Co. KG (Siegen, HRA 6093), the operating company that carries out SIR’s industrial engineering, maintenance and cleaning services; this is a general-partner management relationship under German KG partnership law rather than a straightforward equity subsidiary. All entities in this structure are based in Germany. Information reflects registry-linked corporate-linkage data verified as of 4 September 2026.
### Verified corporate relationships
| Entity | Country | Registration number | Relationship | Ownership | Status | Information date |
|—|—|—|—:|—|—|—|
| Dr. Krumbholz GmbH Wirtschaftspruefungsgesellschaft | DE | HRB 21171 (Amtsgericht Wuppertal) | Immediate and ultimate parent | 100% | Active | 2026-09-04 |
| Schwarte Holding GmbH | DE | HRB 13093 (Amtsgericht Siegen) | Sister company (same verified parent) | Ownership percentage not disclosed | Active | 2026-09-04 |
| Schwarte Gesellschaft mit beschraenkter Haftung | DE | HRB 6771 (Amtsgericht Siegen) | Indirect sister company (subsidiary of Schwarte Holding GmbH) | Ownership percentage not disclosed | Active | 2026-09-04 |
| SIR Industrial Services GmbH & Co. KG | DE | HRA 6093 (Amtsgericht Siegen) | Affiliate – SIR Service GmbH is the personally liable general partner (Komplementaerin) | Not a share-capital holding; general-partner role | Active | 2026-09-04 |
### Data availability
Parent-level ownership is assessed as Full (100% holding identified and corroborated). Sister-company and general-partner relationships are assessed as Partial, since specific ownership or capital-share percentages for those entities are not disclosed in available sources.
### Sources
– Handelsregister (German Commercial Register), via registry-linked corporate-structure data, retrieved 2026-09-16
– Northdata company record for SIR Service GmbH, https://www.northdata.com/SIR%20Service%20GmbH,%20Siegen/HRB%204879, retrieved 2026-09-16
Dr. Krumbholz GmbH Wirtschaftsprufungsgesellschaft
Germany
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Frequently Asked Questions
What does SIR Service GmbH do?
SIR Service GmbH (HRB 4879, Amtsgericht Siegen) is a German GmbH registered on 18 November 2003, based in Siegen, Germany. Its purpose is holding and managing shareholdings and acting as the personally liable general partner (Komplementaerin) of SIR Industrial Services GmbH & Co. KG, which provides industrial engineering, plant maintenance and cleaning services from Siegen and Wetzlar.
Who owns SIR Service GmbH?
One disclosed shareholder: Dr. Krumbholz GmbH Wirtschaftspruefungsgesellschaft (Erkrath, Germany, HRB 21171, Amtsgericht Wuppertal) holds 100% of the EUR 26,000 share capital, verified 4 September 2026.
Who is SIR Service GmbH's UBO (Ultimate Beneficial Owner)?
Every shareholder recorded for SIR Service GmbH is itself a company rather than a natural person, so no Ultimate Beneficial Owner (UBO) is identified at this level; establishing one would require tracing the ownership of each shareholding company in turn.
What is SIR Service GmbH's company registration number?
SIR Service GmbH's registration number is HRB 4879 Siegen, filed with Handelsregister (Commercial Register) in Germany. Its current status on the register is active.
Is SIR Service GmbH still an active company?
SIR Service GmbH's status on Handelsregister (Commercial Register) is listed as active.
When was SIR Service GmbH incorporated?
SIR Service GmbH was incorporated on 1 January 2013, according to Handelsregister (Commercial Register).
What is SIR Service GmbH's registered address?
The registered address on file for SIR Service GmbH is Siegen, Germany.
What legal structure is SIR Service GmbH registered as?
SIR Service GmbH is registered as a Private limited company (Ltd.) in Germany.
Who are the officers/directors of SIR Service GmbH?
Two active managing directors: Jonas Benedikt Maximilian Dicke (appointment confirmed 27 March 2024) and Carsten Achenbach (appointed 25 January 2013). One former managing director: Leopold Schladofsky (resigned 25 January 2013).
Does SIR Service GmbH have a parent company or subsidiaries?
Wholly owned (100%) by Dr. Krumbholz GmbH Wirtschaftspruefungsgesellschaft (HRB 21171, Amtsgericht Wuppertal), which also holds sister companies Schwarte Holding GmbH (HRB 13093) and its subsidiary Schwarte Gesellschaft mit beschraenkter Haftung (HRB 6771). SIR Service GmbH is the general partner (Komplementaerin) of SIR Industrial Services GmbH & Co. KG (HRA 6093).
Can Zavia monitor changes to SIR Service GmbH's ownership over time?
This profile reflects a point-in-time snapshot from Handelsregister (Commercial Register). Zavia's monitoring API can track changes to SIR Service GmbH's registered shareholders, officers, and group structure going forward, flagging updates as they're filed rather than requiring a manual recheck.
Can I access SIR Service GmbH's data through an API?
Yes. Zavia's API connects directly to official government ownership registries across 195 countries and territories, including Germany, so records like SIR Service GmbH's registration, shareholder, UBO, and group-structure data can be queried programmatically instead of viewed one page at a time.
Where does this company information come from, and how current is it?
This record is sourced directly from Handelsregister (Commercial Register) and was last synced on 15 September 2026.