Aro Systems Oy
Aro Systems Oy is a Finnish private limited company (osakeyhtiö), registered with the Finnish Patent and Registration Office (PRH) under Business ID 0114568-2, with its registered office at Karvaamokuja 2b, 00380 Helsinki. The company traces its origin to Sähkö-Aro Oy, first registered on 19 February 1954 and entered in Finland’s Trade Register on 15 March 1978; it adopted its current name, Aro Systems Oy, on 1 January 2014. PRH records the company’s main business line under TOL/TOIMI4 code 43210, “electrical installation,” and its registered status is active.
According to the company’s official website, Aro Systems Oy operates as a building-systems (talotekniikka) contractor, providing electrical and HVAC (heating, ventilation and air conditioning) installation together with related maintenance and energy-efficiency services — including heat-pump and ground-source heating, ventilation heat recovery, EV-charging installation and lighting — for property managers, housing cooperatives, construction and renovation firms, design consultancies and public-sector clients such as schools and hospitals. The company reports employing more than 300 professionals across the Helsinki metropolitan area, Tampere and Hämeenlinna.
Aro Systems Oy’s HVAC and energy-efficiency capability was expanded in autumn 2024 through the acquisition of Kantaputki Oy, a Hämeenlinna-registered heating and ventilation installation business (Business ID 0971914-2), as described in the company’s own published history. Aro Systems Oy has operated in Finland’s electrical contracting sector since the 1950s under family ownership, before the investment firm CapMan joined as a shareholder in late 2022.
- Company fundamentals
- Corporate linkage & group structures
- Digitized company financials
- Firmographics — websites, social profiles, revenue and employee estimates
Shareholders
Shareholders of Aro Systems Oy
Aro Systems Oy is a Finnish private limited company and is not listed on any stock exchange, so it is not subject to public major-shareholder disclosure rules. Finland’s Patent and Registration Office (PRH) does not itself publish a shareholder list for private limited companies, and the country’s Beneficial Owner Register is not accessible through PRH’s open-data interface. According to the company’s own published history, Aro Systems Oy was founded by Pentti and Vera Aro in 1954 and remained under Aro-family ownership through three generations; members of the third generation became significant owners, together holding a 50% stake, around 2014, the same year the company adopted its current name. The company’s history also states that the Finnish investment firm CapMan joined as an investor in late 2022, though the resulting ownership percentages held by CapMan and by the Aro family following that transaction are not disclosed in the sources reviewed.
Data availability
Shareholder disclosure for Aro Systems Oy is best categorised as Not public for verified, percentage-based holdings: Finland does not require private limited companies to file shareholder lists with PRH, and no complete, dated ownership breakdown was found in the sources reviewed. The qualitative ownership history above is Partial and comes from the company’s own published account rather than a registry filing. No ultimate beneficial owner is reported here because no complete, percentage-based ownership chain to a named natural person could be verified from an authoritative source.
Sources
Tarinamme (Our story), arosystems.fi/yrityksemme/, retrieved 15 September 2026 — founding, family ownership history, CapMan investment (2022).
Finnish Patent and Registration Office (PRH) open data, avoindata.prh.fi/opendata-ytj-api/v3/companies?businessId=0114568-2, retrieved 15 September 2026 — confirms no public shareholder register is published for Finnish private limited companies.
Officers
8
Directors and officers of Aro Systems Oy
The retrieved registry extract for Aro Systems Oy lists five officer appointments, out of eight officer records held in the underlying register (last synced 11 August 2026). The current Managing Director is Virve Wegelius-Lehtonen, appointed 16 October 2024. Sakari Uusitalo is recorded as Chairman of the Board effective 30 June 2026, having previously been recorded as a Board Member since 2 February 2023. Olavi Aro is recorded as a Board Member effective 30 June 2026. Henrik Routila is also recorded as Chairman of the Board, appointed 2 February 2023, with no resignation date disclosed in the data reviewed; the reviewed extract does not explicitly confirm whether this reflects a change of chair around 30 June 2026 or a continuing dual record. Correspondence addresses for all listed officers are recorded in Finland; this is a correspondence address only and is not evidence of nationality or residence.
Recent officer changes
Sakari Uusitalo’s appointment as Chairman of the Board, effective 30 June 2026, is the most recent change reflected in the data reviewed. Olavi Aro’s appointment as Board Member is recorded with the same effective date, 30 June 2026. Virve Wegelius-Lehtonen’s appointment as Managing Director, effective 16 October 2024, is the next most recent change on record.
Data availability
Officer information for Aro Systems Oy is Partial: the retrieved extract lists five of eight total officer records held in the underlying register, and does not disclose nationality, occupation as distinct from role, or a resignation date for Henrik Routila’s Chairman appointment. Nationality is not officially disclosed for any officer in the sources reviewed and has not been inferred from name, residence or correspondence address.
Sources
Company officer register extract (Finnish Trade Register-sourced), internal Zavia registry data, last synced 11 August 2026.
Finnish Patent and Registration Office (PRH) open data, avoindata.prh.fi/opendata-ytj-api/v3/companies?businessId=0114568-2, retrieved 15 September 2026.
Registry feed — rows exactly as filed with Finnish Patent and Registration Office (PRH), including entries the profile above does not cover.
Group Structure
Group structure of Aro Systems Oy
Aro Systems Oy is not identified as a subsidiary of any other company in the sources reviewed; no immediate or ultimate parent has been verified. The company’s own published history states that in autumn 2024 Aro Systems Oy acquired Kantaputki Oy, a heating, ventilation and air-conditioning installation business registered in Hämeenlinna, Finland under Business ID 0971914-2, to strengthen its HVAC and energy-efficiency capability. This acquisition is treated here as a verified direct subsidiary relationship on the basis of the company’s own official account of the transaction; the resulting ownership percentage is not disclosed in the sources reviewed. No other subsidiaries, sister companies or branches were verified.
Verified corporate relationships
| Entity | Country | Registration number | Relationship | Ownership | Status | Information date |
|---|---|---|---|---|---|---|
| Kantaputki Oy | Finland | 0971914-2 | Direct subsidiary (acquired) | Ownership percentage not disclosed | Active | Acquired autumn 2024; status confirmed 15 September 2026 |
Recent structural changes
Acquisition of Kantaputki Oy, autumn 2024, as described in Aro Systems Oy’s own published company history.
Data availability
Corporate-linkage information for Aro Systems Oy is Partial: one direct subsidiary relationship (Kantaputki Oy) is verified through the company’s own official account of the transaction, but no ownership percentage, parent company or further subsidiaries could be verified from an authoritative source. Finland’s PRH open-data register does not itself publish corporate group or ownership-chain information.
Sources
Tarinamme (Our story), arosystems.fi/yrityksemme/, retrieved 15 September 2026 — Kantaputki Oy acquisition, autumn 2024.
Finnish Patent and Registration Office (PRH) open data, avoindata.prh.fi/opendata-ytj-api/v3/companies?businessId=0971914-2, retrieved 15 September 2026 — confirms Kantaputki Oy registration, business line and active status.
Aro Systems Oy
Finland
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Frequently Asked Questions
What is Aro Systems Oy's Business ID?
Aro Systems Oy's Finnish Business ID is 0114568-2, as recorded by the Finnish Patent and Registration Office (PRH).
When was Aro Systems Oy founded?
The company originates from Sähkö-Aro Oy, founded by Pentti and Vera Aro and first registered with the Finnish Patent and Registration Office on 19 February 1954; it was entered into Finland's Trade Register on 15 March 1978.
When did the company change its name to Aro Systems Oy?
The company adopted its current name, Aro Systems Oy, on 1 January 2014, according to PRH's open-data company register.
What is Aro Systems Oy's registered business activity?
PRH records the company's main business line under TOL/TOIMI4 code 43210, "electrical installation" (sähköasennus).
What does Aro Systems Oy actually do?
According to its official website, Aro Systems Oy is a building-systems (talotekniikka) contractor providing electrical and HVAC installation, maintenance and energy-efficiency services, including heat pumps, ventilation heat recovery, EV-charging installation and lighting.
Where is Aro Systems Oy registered and where does it operate?
The company's registered office is at Karvaamokuja 2b, 00380 Helsinki, Finland; it states it operates across the Helsinki metropolitan area, Tampere and Hämeenlinna.
Is Aro Systems Oy currently active?
Yes. PRH's open-data register lists Aro Systems Oy's status as active as of the most recent retrieval on 15 September 2026.
Who owns Aro Systems Oy?
According to the company's own published history, Aro Systems Oy is majority-owned by the third generation of the founding Aro family, who became significant owners around 2014, alongside the investment firm CapMan, which joined as an investor in late 2022; exact ownership percentages are not publicly disclosed.
Does Aro Systems Oy publish a public shareholder register?
No. As a Finnish private limited company, Aro Systems Oy is not required to file a public shareholder list with PRH, so shareholder disclosure for the company is categorised as not public.
Who is the Managing Director of Aro Systems Oy?
Virve Wegelius-Lehtonen is recorded as Managing Director, appointed 16 October 2024, according to the company's officer register data.
Who chairs the Board of Aro Systems Oy?
Sakari Uusitalo is recorded as Chairman of the Board effective 30 June 2026, having previously served as a Board Member since 2 February 2023.
Is Aro Systems Oy part of a corporate group?
Aro Systems Oy has no verified parent company. It acquired Kantaputki Oy, a Hämeenlinna-based HVAC installation business (Business ID 0971914-2), in autumn 2024, which is treated as a verified direct subsidiary based on the company's own published account of the transaction.
What is Kantaputki Oy's relationship to Aro Systems Oy?
Kantaputki Oy became a subsidiary of Aro Systems Oy following an acquisition in autumn 2024, intended to strengthen Aro Systems Oy's HVAC and energy-efficiency capabilities, according to Aro Systems Oy's own company history.
What is Aro Systems Oy's legal form?
Aro Systems Oy is registered as an osakeyhtiö (limited company) under Finnish law.
Is officer nationality disclosed for Aro Systems Oy's directors?
No. Nationality is not disclosed in the sources reviewed for any of Aro Systems Oy's officers; only their Finland-based correspondence address is recorded, which is not evidence of nationality.