01—Abstract
Summary
Summary of the 8-K filed August 28, 2026. Cited figures are marked; the original filing is the authoritative source.
McKesson Corporation (MCK) filed an 8-K on August 28, 2026, to disclose a cybersecurity incident that was discovered on August 25, 2026.
The company has initiated an investigation, which is currently in its early stages. McKesson is providing updates on its website at www.mckesson.com/cybersecurity for interested parties. At the time of this filing, the company has not yet determined the materiality of the incident or its potential impact on financial condition or results of operations.
02—Key points
Key Highlights
- McKesson Corporation disclosed a cybersecurity incident discovered on August 25, 2026.
- An investigation into the incident has commenced and is in its early stages.
- The company has established a dedicated webpage for incident updates: www.mckesson.com/cybersecurity.
- As of the filing date, McKesson has not determined the incident to be material.
- No material impact on the company's financial condition or results of operations has been identified or is reasonably likely.
- The filing is primarily for Regulation FD disclosure.
03—Questions
Frequently Asked Questions
What type of cybersecurity incident has McKesson Corporation experienced?
The filing does not specify the exact nature of the cybersecurity incident. It only states that an incident affecting its information systems was discovered.
Has the cybersecurity incident impacted McKesson's financial performance?
As of August 28, 2026, McKesson has not determined that the incident is material or has had, or is reasonably likely to have, any material impact on its financial condition or results of operations.
Where can investors find more information or updates on this incident?
McKesson Corporation is providing information and updates on its dedicated website at www.mckesson.com/cybersecurity.
Is this filing related to any financial results or operational changes?
No, this 8-K filing is primarily a Regulation FD disclosure to inform investors about the discovered cybersecurity incident. It does not contain updated financial statements or report on other significant events, other than the cybersecurity discovery.
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