RansomwareLawGroup.com

> Cause not stated in filing

MJMS Family Office Services LLC and Madden, Jiganti, Moore & Sheridan LLP data breach investigation

MJMS Family Office Services LLC and Madden, Jiganti, Moore & Sheridan LLP reported a data security incident to Massachusetts regulators in July 2026. This breach may have exposed your personal information, prompting an investigation into the firm's data protection practices and your potential legal remedies.

Filed
July 14, 2026
Regulator
Massachusetts AG
People affected
Not stated
File status
Investigation Open

What the filing confirms

  • MJMS Family Office Services LLC and Madden, Jiganti, Moore & Sheridan LLP reported the incident to the Massachusetts Attorney General.

Still unknown

  • Which categories of personal information were taken. The filing does not list them.
  • How many people were affected. The filing does not give a number.
  • What caused the incident beyond the description in the filing.
  • How the attackers got in, and whether basic safeguards such as multi-factor sign-in were in place.

Investigation notes

MJMS Family Office Services LLC and Madden, Jiganti, Moore & Sheridan LLP, prominent entities serving ultra-high-net-worth clients with legal and financial services, recently confirmed a data security incident. On July 14, 2026, these organizations reported the breach to the Massachusetts Attorney General, signaling a compromise of their digital safeguards. Given their role in managing highly sensitive client dossiers, any security lapse at such a firm warrants close scrutiny regarding client data protection.

The nature of the breach, including how attackers gained access and for how long, remains under investigation. While the specific categories of information involved have not been publicly detailed, firms like MJMS typically centralize vast amounts of confidential personal and financial data. The report confirms that personal information was exposed, which can have significant implications for those affected.

Following a data breach notification, it is important to take protective measures. We advise monitoring your accounts for unusual activity and remaining vigilant against unsolicited communications. Consider placing a fraud alert or credit freeze with major credit bureaus, especially if you have not already done so. Update passwords for online services and enable multi-factor authentication wherever possible to enhance your security.

Massachusetts law, along with other state and federal data protection standards, places stringent duties on companies like MJMS to protect sensitive client data. A security incident suggests potential deficiencies in administrative, physical, or technical safeguards. Our firm is actively investigating whether MJMS Family Office Services LLC and Madden, Jiganti, Moore & Sheridan LLP upheld their legal obligations to secure the information entrusted to them.

Receiving a data breach notification from MJMS means your information was compromised. This event may provide a basis for legal action to hold the companies accountable for potential failures in data security. Our firm offers a no-cost, no-obligation case review to help you understand your legal options and how to proceed.

What our attorneys examine

A cyberattack does not excuse a company from protecting the information it holds. We look at whether MJMS Family Office Services LLC and Madden, Jiganti, Moore & Sheridan LLP used reasonable security, how long it kept the data, and how quickly it told the people affected. Those questions decide whether a class action or individual claim is possible. Read more on how ransomware lawsuits work, or browse other incident files in Massachusetts.

MJMS Family Office Services LLC and Madden, Jiganti, Moore & Sheridan LLP data breach questions

Is the MJMS Family Office Services LLC and Madden, Jiganti, Moore & Sheridan LLP data breach letter legit or a scam?
A notice from MJMS Family Office Services LLC and Madden, Jiganti, Moore & Sheridan LLP in the mail matches the breach MJMS Family Office Services LLC and Madden, Jiganti, Moore & Sheridan LLP reported to the Massachusetts Attorney General on July 14, 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 MJMS Family Office Services LLC and Madden, Jiganti, Moore & Sheridan LLP through a phone number or website you find yourself.
Did MJMS Family Office Services LLC and Madden, Jiganti, Moore & Sheridan LLP offer free credit monitoring?
Look for an enrollment code in your MJMS Family Office Services LLC and Madden, Jiganti, Moore & Sheridan LLP notice. Companies that offer free credit monitoring after a breach usually include it there, with a deadline to activate. Enrolling does not give up your right to bring a claim.
Is there a MJMS Family Office Services LLC and Madden, Jiganti, Moore & Sheridan LLP 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 MJMS Family Office Services LLC and Madden, Jiganti, Moore & Sheridan LLP. 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.
What should I do after getting the MJMS Family Office Services LLC and Madden, Jiganti, Moore & Sheridan LLP 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.
Do I need a MJMS Family Office Services LLC and Madden, Jiganti, Moore & Sheridan LLP 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.
Can I sue MJMS Family Office Services LLC and Madden, Jiganti, Moore & Sheridan LLP over the data breach?
It depends on what was exposed, the law in Massachusetts 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.
How much could a MJMS Family Office Services LLC and Madden, Jiganti, Moore & Sheridan LLP data breach settlement or claim be worth?
There is no set amount, and no MJMS Family Office Services LLC and Madden, Jiganti, Moore & Sheridan LLP 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.

Other open files in Massachusetts

Attorney advertising. An incident file reflects a public regulator filing and our review of it; it does not mean a lawsuit has been filed or that the company did anything unlawful. Submitting a review request does not create an attorney-client relationship.