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MonitoringWashington AG filing · March 3, 2026

Brown Advisory LLC Confirms Data Security Incident in Washington Filing

Brown Advisory LLC, an investment management and wealth advisory firm, filed a data breach notification with the Washington Attorney General on March 3, 2026, indicating a cybersecurity incident. The breach may have exposed a wide range of personal and financial information for affected individuals.

State
Washington
Reported
March 3, 2026

What may have been exposed

  • Full Name
  • Social Security Number
  • Date of Birth
  • Financial Account Number
  • Routing Number
  • Tax Identification Number
  • Investment Portfolio Details
  • Mailing Address
  • Email Address
  • Phone Number

Brown Advisory LLC, an independent investment management and wealth advisory firm, filed a data breach notification with the Washington Attorney General on March 3, 2026. This filing indicated a cybersecurity incident that may have exposed sensitive client information.

According to the official filing, the types of information potentially exposed in this incident include Full Name, Social Security Number, Date of Birth, Financial Account Number, Routing Number, Tax Identification Number, Investment Portfolio Details, Mailing Address, Email Address, and Phone Number.

The compromise of such detailed personal and financial identifiers carries significant risks for affected individuals. Those whose data was involved may face an elevated threat of identity theft, unauthorized access to financial accounts, and potential fraudulent activities using their personal information.

Individuals who receive a notification related to this incident should closely monitor all financial account statements, credit reports, and other personal records for any unusual or unauthorized activity. Placing a fraud alert or security freeze on credit files may also be a recommended protective measure.

These details are based on information filed publicly with the Washington Attorney General's office regarding the reported security incident.

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.

  • Secure your online accounts

    Change the password on any account that reused an exposed password and turn on two-factor authentication wherever it's offered.

  • 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: Washington Attorney General filing

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