Information regarding data breach

Dear customers and suppliers,

We hereby inform you that we have experienced a data breach. We want to provide information as early as possible, even though we do not yet have a complete overview of the situation, so that you can take the necessary precautions.

What has happened?
We have suffered a data system outage, which means that a number of our systems and data are currently inaccessible to us, and that the confidentiality of our data has been compromised in a hacker attack. We are currently working to determine what has happened and which data may have been affected.

What does this mean for you as a customer or supplier?
Unfortunately, we know that some data has been copied by unauthorized third parties, but at this stage we cannot say with certainty whether your information is specifically among the affected data. We will continuously update information on our website.

For customers: For a period of time, you may experience difficulties contacting us through our usual channels, and deliveries, order processing, and response times may be affected.

For suppliers: For a period of time, you should expect that our normal processes for placing orders, delivery planning, invoice handling, and payments may be delayed or handled through alternative channels. A number of data sets, including supplier and order information, are currently unavailable to us while we work to restore our systems.

For the time being, we ask you to:
(i) contact us by phone regarding new orders or changes to existing orders, and
(ii) not assume that emails, payment requests, or requests to change account information appearing to come from us are necessarily genuine. Please verify them by phone through your usual contact person with us if you notice changes to our account details.

What are we doing now?
• We have isolated the affected systems to limit the incident.
• We have engaged external IT security experts to assist us in handling the incident.
• We have notified the relevant authorities.
• We are working around the clock to restore normal operations as quickly and safely as possible.

What should you be aware of and do?
As hackers are involved, it is possible that they may publish data on the “dark web,” where we have no control over the data. Since we do not know whether this will happen, it is a good idea to remain particularly vigilant in the coming period.

We recommend that you and your colleagues:
• remain extra cautious regarding emails, text messages, or phone calls claiming to come from us or our partners, and do not click on links or disclose information if you are in doubt,
• contact us at +45 7444 1236 if you receive suspicious inquiries or have questions regarding this notice, and
• share a link to this notice with colleagues whom you know work with us.

We apologize for the inconvenience this situation may cause and take it very seriously.

We will continue to keep you informed as we gain greater clarity about what has happened. The next update is expected to be published on our website on Friday, 8 May 2026.

With kind regards

Peter Bendtsen
CEO
Petersen Tegl A/S

Peter Zinck
CEO
Petersen Gruppen A/S