McGraw Hill data breach (2009–2026)

Identity resolution

Canonical name: McGraw Hill
Normalized: mcgraw hill— dedupe via name-norm; Microsoft / MSFT collapse to one row
GLEIF LEI: 549300ZPDM0WYNSCLI93
SEC EDGAR CIK: 0001951070
Domain: mheducation.com

Disclosure history (2)newest first

GLOBALLeak Siteas victim2026-04-11
Over 45M Salesforce records containing PII data have been compromised. Pay or leak. This is a final warning to reach out by 14 Apr 2026 before we leak along with several annoying (digital) problems that'll come your way. Make the right decision, don't be the next headline. | Updated: 11 Apr 2026 | Warning: FINAL WARNING PAY OR LEAK
Massachusetts State AGas victim2009-10-21
McGraw-Hill Construction reported a data breach to the Massachusetts Office of Consumer Affairs and Business Regulation. The breach was reported on 2009-10-21. 1 Massachusetts residents were affected. The report records the breach type as electronic.

Subsidiary disclosures (1)filed by group companies

◈ These filings were made by or about subsidiaries of McGraw Hill — not by McGraw Hill itself. Corporate relationships are mapped from GLEIF relationship records and SEC Exhibit 21 filings.

Tracked subsidiaries✦ MCGRAW-HILL EDUCATION, INC.

Massachusetts State AGvia MCGRAW-HILL EDUCATION, INC.2017-09-29
McGraw-Hill Education reported a data breach to the Massachusetts Office of Consumer Affairs and Business Regulation. The breach was reported on 2017-09-29. 1 Massachusetts residents were affected. The report records the breach type as electronic.