Hera remains a Top Employer: people, skills and innovation to drive the Group’s strategy
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The transaction, with a total value of €138 million, is expected to contribute more than €20 million to the growth of the Hera Group’s EBITDA

A group rooted across Northern Italy
The Hera Group has finalised the acquisition of 100% of STA Società Trattamento Acque S.p.A., based in Mantua, together with its subsidiaries: NTW (Cornuda – Treviso), CID (Colloredo di Monte Albano – Udine), NPC (Marene – Cuneo), Trentino Acque (Lavis – Trento), COMS (Talmassons – Udine) and Acque della Concordia (Mantua).
Taken together, these companies form the Sostelia Group, which, thanks to the distinctive expertise of its entities, ranks among Italy’s leading private players in the water treatment sector, offering advanced technologies, research and development capabilities, and high-level technical know-how. The sale was carried out for 65% by Xenon Fidec, an impact private equity fund managed by Xenon AIFM, and for the remaining 35% by entrepreneurs, minority shareholders of STA who, starting in August 2023, had transferred the entire share capital of the individual companies to the fund.
The Sostelia Group’s key figures
The Sostelia Group manages more than 1,200 treatment plants, serves over 1,200 active clients, employs around 350 people and has a turnover of approximately €100 million. Its financial and economic profile confirms the industrial strength of the transaction. Around 70% of its activities are focused on industrial clients.
Economic rationale: enterprise value of €138 million and more than €20 million contribution to EBITDA
The transaction has an enterprise value of €138 million and is expected to generate a contribution of more than €20 million to the growth of the Hera Group’s consolidated EBITDA, in addition to the value of the expected integration synergies.
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Hera remains a Top Employer: people, skills and innovation to drive the Group’s strategy
For the seventeenth consecutive year, we are confirmed among the leading organisations for human resources management

We have once again been ranked among the best Italian companies for people management and development policies, obtaining the Top Employer certification for the seventeenth year running.
The award recognises the Hera Group’s strategic commitment to continuous learning and organisational wellbeing, in a landscape where career longevity, talent attraction and generational inclusion are increasingly critical.
With over 10,500 employees, 96% of whom are employed on permanent contracts, we distinguish ourselves through an HR model founded on flexible welfare, 360-degree wellbeing, professional growth, the enhancement of uniqueness and a strong cultural identity. Furthermore, our multi-business nature represents a significant benchmark on the national stage, offering diverse career paths and the opportunity to develop new skills within the same organisation.
For us, continuous training is a cornerstone of its ‘people strategy’: thanks to an annual investment of approximately €15 million, over 97% of employees participate in at least one training initiative, averaging 30 hours per capita. A central role is played by HerAcademy, our corporate university, which aims to support the energy, environmental, digital and technological transitions through innovative programmes and ongoing dialogue with academia.
On the welfare front, we allocate €23 million annually to its Hextra system, which involves 99% of the workforce. The scheme offers, among other opportunities, initiatives for parenting support, health and pension services, and programmes dedicated to psychological and financial wellbeing.
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