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HMH (hmhco.com)

shinyhunters

This record tracks a ransomware attack claimed by the shinyhunters group against HMH (hmhco.com). It collects the publicly disclosed attack details — sector, location and timeline — as published on the operator's leak site and indexed by Breach House.

Country
United States
Business Category
Education
Employees
51-100
Discovered
2025-10-03
Published
July 08, 2025
Victim ID
6yuFOGNYwyal

Attack Summary

[AI generated] HMH, or Houghton Mifflin Harcourt, is a long-established publishing company specializing in educational content. They provide a variety of instructional technology, assessments, and other learning materials to schools in over 150 countries. The company also publishes a number of well-known trade and reference works, alongside children's books. Their goal is to foster a lifelong love of learning in every individual they serve.

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