secwatch.observer — SEC 8-K summary
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Issuer:     MCKESSON CORP (MCK)
CIK:        0000927653
Form:       8-K
Filed at:   2026-08-28T20:05:30+00:00
Accession:  0000927653-26-000247
Event type: cyber
Sentiment:  negative
Materiality: 0.50
Item codes: 7.01, 9.01
LLM model:  deepseek-v4-flash:cloud@v2

McKesson discloses cybersecurity incident on Aug 25, 2026; investigation early
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- Cybersecurity incident discovered Aug 25, 2026 affecting information systems; investigation in early stages.
- Company has not determined incident is material or likely to have material impact on financials or operations.
- Updates to be posted on company website at www.mckesson.com/cybersecurity as investigation proceeds.

Source:
  EDGAR index:    https://www.sec.gov/Archives/edgar/data/927653/000092765326000247/0000927653-26-000247-index.htm
  Primary doc:    https://www.sec.gov/Archives/edgar/data/927653/000092765326000247/mck-20260825.htm
  HTML page:      https://secwatch.observer/filing/0000927653-26-000247

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