Holcim AG
Zug, Switzerland4 sources
Confirmed:Confirmed by the organisation, a regulator or a securities filing. First reported 31 Oct 2026.
Holcim AG Switzerland building materials data theft claim by Emperador group
Holcim AG confirmed a cyberattack and data theft claim by the Emperador group, which alleged stealing over 360 GB of files. Production and logistics continued normally despite the incident.
- Type
- Data breach
- Sector
- Manufacturing
- Records
- 360 records claimed
- Attributed to
- Emperador
- First reported
- 31 Oct 2026
- Latest source
- 4 Nov 2026
What to do
- If you have an account, change that password, and anywhere you reused it.
- Turn on two-factor authentication, ideally an authenticator app or passkey, not SMS.
- Expect phishing that uses your real details. Do not click links in messages about this incident; go to the company's site directly.
- If payment cards were involved, watch statements and ask your bank for a new card.
- If government ID or social security numbers were involved, consider a credit freeze.
- If this is a vendor of yours, ask what of your data they held and whether it was in scope.
- Reset any API keys, SSO trusts or shared credentials you have with them.
- Brief your help desk: attackers often impersonate the breached brand next.
Not sure? Ask an assistant with the sources attached, or have a coding agent check your systems.
Check your systems for Holcim AG