McKesson discloses cybersecurity incident under investigation, says no known material impact

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McKesson disclosed a cybersecurity incident affecting its information systems and said an investigation is in its early stages.

Key Highlights:

- On Aug. 25, 2026 McKesson discovered a cybersecurity incident impacting its information systems.

- The investigation is in its early stages; updates will be posted at www.mckesson.com/cybersecurity.

- As of this filing, McKesson has not determined the incident is material or likely to have a material impact on financial condition or results.

Original SEC Filing: MCKESSON CORP [ MCK ] - 8-K - Aug. 28, 2026

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