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06-05-2026
Dear employees of Petersen Germany GmbH

Petersen Tegl A/S and Petersen Germany GmbH wish to inform you that we have been affected by a cybersecurity incident which may have involved your personal data. This communication serves as a preliminary notice. The investigation into the incident is ongoing and we do not yet have all relevant information at our disposal. We will provide you with a further update as soon as additional information becomes available.

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Update 08-05-2026
(Following update of 06-05-2026)

No leakage of the stolen data has been detected.

The technical specialist team we are working with will continue to monitor and reconfirm that they do not find any evidence that your data has been leaked.

The technical experts assisting us in this matter are working intensively to restore all systems, and we hope and plan to restart the most critical systems next week and restore normal operations regarding deliveries, order processing, and payments.

A lot has been learned from and during this outage, and a strengthened IT setup is now being prepared, incorporating new initiatives and the latest IT security measures.

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(Continuation of message 06-05-2026)

What happened?

On 28 April 2026, a ransomware attack affecting a group IT environment was detected. Systems were encrypted and we took them offline. The incident is still ongoing, and investigations are being conducted with the assistance of external IT security specialists.

What data may be affected?

At this stage, we do not yet have a complete overview of the specific personal data impacted. For you as an employee, this may potentially include ordinary employment-related personal data.

What measures are we taking?

- The incident has been reported to the competent data protection authority.

- Affected systems have been isolated.

- External cybersecurity experts are supporting investigation and recovery.

What should you be aware of?

Please remain vigilant with regard to suspicious emails, SMS messages or phone calls claiming to be from us, and do not disclose personal information unless the sender’s identity is verified.

Contact:
Poul Kjeldsen
Poul.Kjeldsen@stofanet.dk
+45 30 62 63 02