InformationalBreach / campaignMonitoring

Henry Schein 8-K cyber incident reported by SEC EDGAR listing, not confirmed

An SEC EDGAR listing headline says Henry Schein disclosed a cyber incident in a Form 8-K, details are not confirmed, so watch for official updates.

Published
Exploitation
No, not confirmed: the available filing text does not describe any incident or exploitation

What happened

A listing headline from SEC EDGAR dated November 3, 2026 says that Henry Schein, Inc. disclosed a cyber incident in an SEC Form 8-K filing. That headline is the only source for the claim.

The document linked from that listing (exhibit EX-99.1), as provided to us, is a Henry Schein press release reporting third quarter 2026 financial results and raising full-year guidance, according to SEC EDGAR. That exhibit text does not mention a cyber incident, and it does not describe any incident’s nature, timing, systems involved, cause or data affected.

Not confirmed:

  • Whether a cyber incident is described anywhere in the filing beyond the listing headline
  • What kind of incident it is, when it was detected, or whether it is contained
  • Whether any customer, patient or partner data is involved
  • Any attacker, entry point or operational impact

In the material available to us, Henry Schein has not described an incident, and no independent outlet has reported on it.

Am I affected?

Not confirmed. In the same SEC EDGAR exhibit, Henry Schein describes itself as a provider of products, services and technology platforms to office-based dental and medical practitioners. The available filing text does not identify any affected customers, products or services.

What to do now

  1. Watch Henry Schein’s official channels and its SEC filings for a statement that describes any incident.
  2. Be cautious with unexpected messages that reference a Henry Schein incident, and verify them through contacts you already know.
  3. Check back here. This advisory will be updated if the company or other sources confirm details.

Sources