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Plante Moran

Plante Moran Vendor Cyber Rating & Cyber Score

plantemoran.com

Co-founder Frank Moran often referred to our firm as “a people firm disguised as an accounting firm.” Why? Because people are at the core of everything we do. At Plante Moran, business is never “just business” — it’s personal. It’s personal to our clients, and it’s personal to us. Our clients count on us to advance their businesses, chart new territories, build stronger strategies, and — most importantly — help support those who count on them. And with over 3,800 professionals in 23 locations across the East Coast, Midwest, Rocky Mountain Region, and internationally — and a legacy that’s 100 years strong — we deliver. We’re proud to be one of the nation’s largest audit, tax, consulting, and wealth management firms. #PlanteMoranProud


Plante Moran A.I CyberSecurity Scoring

Plante Moran
Company Information
Website:http://www.plantemoran.com
Employees number:4,670
Number of followers:63,610
NAICS:5412
Industry Type:Accounting
Homepage:plantemoran.com
Plante Moran Risk Score (AI oriented)
Between 700 and 749
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Plante MoranAccounting
Updated:
01/04/2026
737/1000
Moderate
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Powered by our proprietary A.I cyber incident model
Insurance prefers TPRM score to calculate premium
Plante Moran Global Score (TPRM)
xxxx
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Plante MoranAccounting
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Findings

Plante Moran
Plante MoranModerate
Current Score
737Ba (MODERATE)
01000
1 incidents
0 avg impact
Incident timeline with MITRE ATT&CK tactics, techniques, and mitigations.
JUNE 2026
739Before Incident
MAY 2026
738Before Incident
APRIL 2026
738Before Incident
MARCH 2026
737Before Incident
FEBRUARY 2026
737Before Incident
JANUARY 2026
736Before Incident
DECEMBER 2025
736Before Incident
NOVEMBER 2025
735Before Incident
OCTOBER 2025
734Before Incident
SEPTEMBER 2025
734Before Incident
AUGUST 2025
733Before Incident
JULY 2025
732Before Incident
APRIL 2023
764Before Incident
Breach
01 Apr 2023Plante Moran
Plante & Moran PLLC

Data Breach at Plante & Moran PLLC

707After Incident
HIGH-57
PLA153072625
The Michigan Attorney General's Office reported a data breach involving Plante & Moran PLLC on May 12, 2023. The breach occurred in the last week of April 2023, involving unauthorized access to electronic human resource files containing personal identifiable information (PII) such as names, dates of birth, and social security numbers of affected individuals. The number of individuals affected is currently unknown.
INCIDENT DETAILS -
TYPE
Data Breach
IMPACT
NamesDates of BirthSocial Security Numbers
DATA BREACH
PIISensitivity Of Data: HighNamesDates of BirthSocial Security Numbers

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