DataBreachInformation.com
Investigation OpenIN AG filing · June 29, 2026

Mather & Co CPAs LLC Reports Data Security Incident to Indiana Regulators

Mather & Co CPAs LLC has reported a data security incident impacting its systems, which occurred on February 26, 2026. The accounting firm filed a notice with regulators in Indiana on June 29, 2026, indicating that an investigation into the event is currently underway. This notice serves to inform potentially affected individuals about the system compromise.

State
IN
Breach date
February 26, 2026
Reported
June 29, 2026

Mather & Co CPAs LLC, an accounting firm, has publicly acknowledged a data security incident. This event involved a compromise of their systems, which was identified as occurring on February 26, 2026. The firm has initiated an investigation to understand the full scope and impact of this security lapse.

According to public filings, the specific nature of the breach, including how it occurred, remains unspecified in the available records. Similarly, the exact categories of personal information that may have been exposed as a result of this incident have not been detailed. Individuals who receive a direct notification from Mather & Co CPAs LLC should review its contents carefully for further specifics.

The firm submitted its official report regarding the incident to regulatory authorities on June 29, 2026. At the time of this filing, the investigation into the data security event was ongoing. This means that Mather & Co CPAs LLC is still working to determine all relevant details about the compromise and its potential effects.

For individuals who may be affected, it is generally recommended to remain vigilant. Reviewing account statements and monitoring for any unusual activity can help identify potential misuse of your data. Consider placing a fraud alert or security freeze on your credit reports as a proactive measure, which can help prevent unauthorized access to your financial accounts.

These details are based on information made available through public data breach notification records. Official notices from Mather & Co CPAs LLC would provide the most direct information for those directly impacted by this security incident.

What to do if you were affected

These general steps can help limit the risk of identity theft and fraud after any data breach.

  • 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.

What to know about the Mather & Co CPAs LLC data breach

Where can I see the official Mather & Co CPAs LLC breach notice?
Mather & Co CPAs LLC's report is published by the IN Attorney General: https://www.in.gov/attorneygeneral/consumer-protection-division/id-theft-prevention/security-breaches/#mather-co-cpas-llc-2026 Compare it with the letter you received to confirm the dates and details match.
What should I do after getting the Mather & Co CPAs LLC data breach notice?
Keep the letter and the envelope, and note the date it arrived. Freeze your credit with Equifax, Experian and TransUnion, change any passwords the notice mentions, and sign up for any free credit monitoring the letter offers. Then check whether you may have a claim.
Is the Mather & Co CPAs LLC data breach letter legit or a scam?
A notice from Mather & Co CPAs LLC in the mail matches the breach Mather & Co CPAs LLC reported to the IN Attorney General on June 29, 2026. Check that the company name and dates in your letter match that filing. A real notice of data security incident won't ask for your password, Social Security number or a payment — if it does, contact Mather & Co CPAs LLC through a phone number or website you find yourself.
Did Mather & Co CPAs LLC offer free credit monitoring?
Check your letter from Mather & Co CPAs LLC. If free credit or identity monitoring is offered, the enrollment code and deadline are printed in the notice itself. Using the free service won't stop you from joining a lawsuit or settlement later.
Can I sue Mather & Co CPAs LLC over the data breach?
It depends on what was exposed, the law in IN and your own state, and whether you've been harmed. Most people take part through a class action rather than suing alone. Keep your notification letter — it's the proof that connects you to the breach.
Is there a Mather & Co CPAs LLC data breach class action lawsuit?
Law firms often open an investigation after a breach notice like this one, and a class action lawsuit may follow. This page doesn't confirm that a lawsuit has been filed against Mather & Co CPAs LLC. You usually don't have to join a class action to be included — if a settlement is reached, class members are notified and can file a claim.
How much could a Mather & Co CPAs LLC data breach settlement or claim be worth?
There is no set amount, and no Mather & Co CPAs LLC settlement is confirmed here. In past data breach settlements, payments depended on what data was exposed and on documented losses — fraud, out-of-pocket costs and time spent dealing with the breach. Keep receipts and records; they're what damages claims are built on.
Do I need a Mather & Co CPAs LLC data breach lawyer or attorney?
An attorney can read your notice and tell you whether a claim makes sense. A case review here is free, and data breach cases are usually handled on contingency, so there is no upfront cost.

Source: IN Attorney General filing

Related data breach cases

Mather & Co CPAs LLC Data Breach 2026: Filing Record