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Semple Marchal and Cooper Data Breach Lawsuit Investigation
Shamis & Gentile P.A., one of the nation's premier class action law firms specializing in data breach cases, is investigating the Semple Marchal and Cooper, LLP data breach.
If you were affected by the data breach, your sensitive personally identifiable information may have been exposed, and you may be eligible for compensation.
About Semple Marchal and Cooper, LLP
Semple Marchal and Cooper LLP is a certified public accounting firm headquartered in Phoenix, Arizona. Founded in 1982, the firm provides accounting, auditing, tax planning and compliance, and management consulting services in the Southwest.
The firm serves a wide range of clients and is licensed in several southwestern states. Semple Marchal and Cooper LLP is a member of major industry organizations including the American Institute of Certified Public Accountants and the Public Company Accounting Oversight Board.
What happened?
Semple Marchal and Cooper LLP experienced a significant data breach. The incident was the result of a ransomware attack by a group known as INTERLOCK, which claimed to have stolen 564 GB of data from the firm’s internal systems.
The breach reportedly involved unauthorized access to an internal share drive through a phishing campaign that bypassed detection systems in February 2025. The breach was discovered on May 10, 2025 and impacted at least one of the firm's clients.
Semple Marchal and Cooper LLP notified SmartRent Technologies of the incident on July 8, 2025. The compromised data included documents related to SmartRent Technologies Inc.’s 401k retirement savings plan, affecting current and former employees from 2019 to 2024.
Exposed Information
- Full name
- Surname
- Full address
- Social Security number
- Sex
- Hire date
- End date
- Employment status
- Date of birth
- Marital status
The data breach was disclosed to the Maine Attorney General's office and affected individuals were notified by mail beginning on Aug. 7, 2025.
Your Rights and Next Steps
If you received a data breach notification from Semple Marchal and Cooper LLP or SmartRent Technologies, you have important rights and options. You may be entitled to seek compensation for any harm or inconvenience caused by this cybersecurity incident.
- Identity theft protection services: Sign up for the free 24 months of IDX identity theft protection services offered.
- Monitor your accounts carefully: Check your financial statements regularly for suspicious activity or unauthorized transactions. If you notice anything unusual, contact your financial institution immediately.
- Fraud alert and credit reports: A fraud alert informs creditors to take extra steps to verify your identity before opening new accounts in your name. Consumers are also entitled to one free credit report annually from each credit bureau. You can request a fraud alert or a credit report by contacting any one of the three major credit bureaus.
- Seek legal help: Lawyers are ready to help you understand your rights and pursue compensation.
You May Be Entitled to Compensation
If your personal information was compromised in the Semple Marchal and Cooper LLP data breach, you may be eligible for compensation, which could include reimbursement for out-of-pocket expenses, time spent addressing the breach, or payment for emotional distress.
Lawyers are investigating claims and are ready to help. To find out if you qualify and to join a potential class action lawsuit, complete the form below.
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