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Case file

Case File: HarbisonWalker International, Inc. Data Breach

This file collects the dated facts on record for the HarbisonWalker International, Inc. incident. The state report is dated September 25, 2026. The incident itself is dated September 1, 2026.

Timeline

24 days separate the incident date from the date it was reported.

  1. September 1, 2026Incident dateWhen the filing says the breach took place.
  2. September 25, 2026Report filed in TexasDate the notice was lodged with the Texas Attorney General.

Case facts

Filing state
Texas
Date reported
September 25, 2026
Incident date
September 1, 2026
Receiving office
Texas Attorney General

Data categories in the file

  • Full Name
  • Social Security Number
  • Date of Birth
  • Wage and Compensation Information
  • Tax Return Information
  • Direct Deposit Account Details
  • Home Address
  • Employee ID Number

Case notes

HarbisonWalker International, Inc., a prominent industrial manufacturing and refractory solutions company, filed notice of a data security incident with the Texas Attorney General on September 25, 2026. The company disclosed that it identified unauthorized access within its digital network environment on September 1, 2026. This network intrusion led to the compromise of sensitive personal information belonging to current and former employees, contractors, and business partners.

The reported data exposure includes Full Name, Social Security Number, Date of Birth, Wage and Compensation Information, Tax Return Information, Direct Deposit Account Details, Home Address, and Employee ID Number. The official filing with the Texas Attorney General did not specify the total number of individuals impacted by this security incident.

The compromise of this range of personal and financial identifiers carries substantial risks for affected individuals. The exposure of Social Security Number, Wage and Compensation Information, Tax Return Information, and Direct Deposit Account Details creates a heightened potential for identity theft, fraudulent financial transactions, and unauthorized access to banking or tax-related accounts.

Individuals who receive a data breach notification from HarbisonWalker International, Inc. should take immediate steps to protect themselves. It is recommended to regularly review bank statements and credit reports for any suspicious or unauthorized activity. Placing a fraud alert or security freeze with major credit bureaus can help prevent new accounts from being opened in your name.

This incident, as reported by HarbisonWalker International, Inc., highlights the ongoing challenges companies face in securing extensive repositories of sensitive employee and operational data. The investigation into the breach is currently ongoing, with the company indicating a monitoring status.

Questions about this case file

Where does the HarbisonWalker International, Inc. case file come from?
Every entry is taken from the breach report HarbisonWalker International, Inc. lodged with the Texas Attorney General. Nothing here is estimated.
Why do the incident date and the report date differ?
Companies usually investigate before they report. The gap between the two dates shows how long that took.
What does the records-affected figure count?
It is the number the company gave the state. It can cover residents of that state only, so the national total may be higher.
Does this case file change over time?
Yes. When a company files an update or a new state publishes its copy of the report, the dates and counts here are refreshed.

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Filing source: Texas Attorney General