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Confirmed breach

Astrana Health data breach

USUnited States · CA

Astrana Health (CA, United States) notified the US Securities and Exchange Commission (8-K Item 1.05) of a data breach on 23 September 2026.

Status
Confirmed breach
People affected
Not reported yet
Reported
23 September 2026

What was exposed

The register’s list does not say what was exposed; the notice it links to (under Sources) usually does.

How it happened

How
Ransomware source
Attacker
Falcon (claimed on its own leak site) source

What changed since it was first reported

  1. Confirmed breach (US Securities and Exchange Commission (8-K Item 1.05))

Sources

Official notices are read by code from the regulator’s own register. An attackers’ claim is their own word and is not verified. More notices to SEC filings. · Corrections and changes

If Astrana Health had your data

  1. Look for Astrana Health’s own notice or letter: it should say what of yours was involved. Keep it.
  2. The register’s list does not say what was exposed; the notice it links to (under Sources) usually does. If Astrana Health has a password of yours, change it now to be safe.
  3. Expect scams that use your details: calls, texts or emails pretending to be Astrana Health, your bank or the police. Never give codes or passwords, never approve a sign-in you did not start, never move money.

One email to confirm first. We use your address only for this alert, and one click deletes it.

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From the data breach tracker: official notices, breach databases and the news, every fact with its source. Open data (CC BY 4.0) · How the tracker works · Official registers · Corrections and changes · Found a mistake? Tell us and we correct it.