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MonitoringIndiana AG filing · May 5, 2026

331Diamond Chemical Co LLC Reports 2025 Data Incident in Indiana

331Diamond Chemical Co LLC, an Indiana-based company, has reported a data security incident that occurred in July 2025. The company filed details of the breach in May 2026, indicating that some personal information may have been compromised. This event is important for affected individuals to understand the potential risks to their data.

State
Indiana
Breach date
July 26, 2025
Reported
May 5, 2026

What may have been exposed

  • Full Name
  • Social Security Number
  • Date of Birth
  • Mailing Address
  • Wage and Compensation Information
  • Tax Return Information
  • Direct Deposit Account Details
  • Health Insurance Records

331Diamond Chemical Co LLC, located in Indiana, recently disclosed a data security incident. This event, which the company reported on May 5, 2026, involved unauthorized access to its systems. The breach occurred on July 26, 2025, and details of the incident have been publicly filed.

The company's filing indicates that during the July 2025 event, certain personal information maintained by 331Diamond Chemical Co LLC was potentially exposed. While the specific nature of the accessed data was not detailed in the public report, the incident prompted the company to initiate an investigation and take steps to address the security lapse.

For individuals whose information may have been involved, it is important to remain vigilant. Although the number of affected individuals and the precise data types were not specified in the public record, any unauthorized access to personal information carries potential risks. The company noted that it is currently monitoring the situation.

To protect themselves, individuals should carefully review any notifications they receive from 331Diamond Chemical Co LLC. It is also wise to monitor financial account statements and credit reports for any suspicious activity. Consider placing a fraud alert or security freeze on your credit files as a proactive measure against potential misuse of your data.

Always be cautious of unsolicited communications that ask for personal details. If you receive suspicious emails or calls claiming to be from the company, verify their authenticity directly through official channels before providing any information. Staying informed and proactive is key to managing risks associated with such security incidents.

What to do if you were affected

Based on the categories of information reported in this filing, these steps can help limit the risk of identity theft and fraud.

  • Freeze your credit

    Place a free credit freeze with Equifax, Experian, and TransUnion. A freeze blocks new accounts from being opened in your name and can be lifted anytime.

  • Guard against tax fraud

    File your tax return as early as possible and consider requesting an IRS Identity Protection PIN so no one can file a fraudulent return in your name.

  • Watch your financial accounts

    Review bank and card statements for unfamiliar activity and turn on transaction alerts. Report anything you don't recognize to your bank right away.

  • Check for medical identity theft

    Review the Explanation of Benefits statements from your health insurer for services or claims you never received, which can signal misuse of your medical identity.

  • Stay alert to targeted scams

    Be cautious of calls, texts, or emails that reference this breach. Legitimate organizations won't ask you to confirm sensitive details through an unsolicited message.

  • Keep your notification letter

    Save the notice you received. It documents that your information was involved and is often needed to enroll in any credit monitoring offered or to join a related legal claim.

Source: Indiana Attorney General filing

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