Société d'Economie Mixte Immobilière de Saintonge

SEMIS, also known as Société d'Economie Mixte Immobilière de Saintonge, is a mixed‑economy housing enterprise headquartered in France. It operates as a social housing provider, managing residential properties and offering accommodation services to tenants in the Saintonge area. Its core activity consists of developing, maintaining and allocating affordable dwellings that meet public‑interest housing objectives. As a Société d'Economie Mixte, the organisation combines public and private capital, which gives it a distinct governance model compared with purely public or private housing firms. This structure enables it to pursue social missions while benefiting from private‑sector efficiency and investment capabilities.

In December 2022 SEMIS suffered a malicious cyber incident in which fraudulent emails were sent to tenants, containing false payment requests and phishing links aimed at identity theft. The attack disrupted the organisation's information systems, impairing its ability to carry out normal housing‑management functions and causing operational dysfunction. Since the event SEMIS has been strengthening its security measures, restoring services and advising recipients to ignore suspicious communications and report them through official channels. The incident highlights the vulnerability of social‑housing providers to cyber‑threats that target both organisational infrastructure and the personal data of residents. No further details about the organisation's size, subsidiaries or parent entities are disclosed in the available sources.