BreachCensus

Hyatt Hotels Corporation

HospitalityUnited States of America

Hyatt Hotels Corporation is a hospitality organisation in Washington. It appears on the California Attorney General breach-notification register and the Washington State Attorney General breach-notification register with 3 confirmed incidents; the most recent notice was filed on October 12, 2017.

Headquarters
Chicago, United States
ISIN
US4485791028
LEI
T27JQIMTYSH41TCD5186
Wikidata
Q1425063

Data as of September 6, 2026.

Confirmed incident

Filed in WA and CA — Data Interception

The same incident was filed separately with 2 jurisdictions within a few days of each other (WA and CA) — shown here as one incident.

Occurred
March 18, 2017
Disclosed
October 12, 2017

Timeline

  1. October 12, 2017
    Reported to regulator Regulator

    WA AG breach notification: 640 Washington residents affected

    source
  2. October 12, 2017
    Reported to regulator Regulator

    CA AG breach notification: an unknown number of California residents affected

    source
What a Washington notice means

Governed by RCW 19.255.010. Notice to the Attorney General is required when a breach affects more than 500 Washington residents.

Note: the count is Washington residents only, not a total.

Washington breach-notification register ↗

What a California notice means

Governed by Cal. Civ. Code §1798.82. A copy of the notification must be sent to the Attorney General when a single breach requires notifying more than 500 California residents.

Note: no affected-count is published on this register.

California breach-notification register ↗

Confirmed incident

Filed in WA and CA — Malware Deployment

The same incident was filed separately with 2 jurisdictions within a few days of each other (WA and CA) — shown here as one incident.

Occurred
August 13, 2015
Disclosed
January 14, 2016

Timeline

  1. January 14, 2016
    Reported to regulator Regulator

    WA AG breach notification: 15 Washington residents affected

    source
  2. January 14, 2016
    Reported to regulator Regulator

    CA AG breach notification: an unknown number of California residents affected

    source
Unverified claim

US — Ransomware Attack

This is an unverified claim — it has allegedly happened to this organisation, as posted by a source below, but has not been confirmed by a regulator, a court filing or the organisation’s own disclosure.

Timeline

  1. December 14, 2025
    Claimed by threat actor (unverified) Claim

    Ransomware leak-site claim (ransomware_live)

    source