Manpower Data Breach Hits 145,000 After RansomHub Ransomware Attack

Manpower, one of the world’s largest staffing and recruitment companies, has confirmed that nearly 145,000 individuals had their personal data compromised following a ransomware attack in late December 2024. The company, which operates as part of ManpowerGroup alongside Experis and Talent Solutions, employs more than 600,000 workers across 2,700 offices worldwide and reported $17.9 billion in revenues last year. 

The breach came to light after the company investigated a systems outage at a Lansing, Michigan, franchise in January 2025. According to a filing with the Office of the Maine Attorney General, attackers gained unauthorized access to Manpower’s network between December 29, 2024, and January 12, 2025. In notification letters sent to affected individuals, Manpower revealed that certain files may have been accessed or stolen during this time. The company stated that the breach potentially exposed personal information, though the full scope of data compromised remains undisclosed. 

On July 28, 2025, the staffing firm formally notified 144,189 individuals that their data may have been involved in the incident. Following the discovery, Manpower announced that it had implemented stronger IT security measures and is cooperating with the FBI to pursue those responsible. To mitigate the impact on victims, the company is also offering complimentary credit monitoring and identity theft protection services through Equifax. 

The ransomware

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