Monitor McKesson's website and subsequent filings for updates on the investigation. The lack of a materiality determination is typical at this early stage, but any escalation—such as a data breach notification, operational disruption, or regulatory inquiry—could introduce downside risk. The stock has historically rallied on neutral filings, but this event introduces headline risk that was absent in prior filings.
Price Chart
Executive Summary
McKesson disclosed a cybersecurity incident discovered on August 25, 2026, affecting its information systems. The investigation is in early stages, and the company has not yet determined the incident to be material or reasonably likely to have a material impact on financial condition or results of operations. This is a preliminary disclosure with no financial figures or quantified impact provided.
Key Facts
- McKesson discovered a cybersecurity incident on August 25, 2026.
- The investigation is in its early stages.
- The company has not determined the incident is material or reasonably likely to have a material impact.
- Updates are available on the company's website at www.mckesson.com/cybersecurity.
- No financial impact or operational disruption has been quantified in the filing.
Financial Impact
No financial impact quantified in the filing. The company states it has not determined the incident is material.
Risk Factors
- Potential escalation of the incident to a material breach, leading to remediation costs, legal liability, or reputational damage.
- Regulatory scrutiny or customer churn if sensitive data is compromised.
- Operational disruption if systems remain compromised.
Market Snapshot
Investment Themes
Documents Analyzed
This report is based on 3 SEC documents filed with EDGAR.
| Document | Accession Number |
|---|---|
| 8-K Filing (Primary) | 0000927653-26-000247 |
| Document: 0000927653-26-000247-index.html | 0000927653-26-000247 |
| Document: 0000927653-26-000247.txt | 0000927653-26-000247 |
Track record builds as more directional reports settle.
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
Aug 28, 2026 4w ago | 8-K | $885.32 $851.02 | ▼ −3.87% | ▼ −3.93% | $898.82 (+1.52%) |
Jul 1, 2026 13w ago | 8-K | $768.06 $888.56 | ▲ +15.69% | ▲ +17.87% | $898.82 (+17.02%) |
Jun 30, 2026 13w ago | DEFA14A | $768.06 $888.56 | ▲ +15.69% | ▲ +17.87% | $898.82 (+17.02%) |
Jun 12, 2026 15w ago | DEFA14A | $779.78 $812.28 | ▲ +4.17% | ▲ +4.92% | $898.82 (+15.27%) |
Jun 12, 2026 16w ago | 8-K | $784.05 $805.96 | ▲ +2.79% | ▲ +1.01% | $898.82 (+14.64%) |
Jun 8, 2026 16w ago | Insider Cluster | $766.64 $784.23 | ▲ +2.29% | ▲ +0.66% | $898.82 (+17.24%) |
Jun 3, 2026 17w ago | Insider Cluster | $739.40 $768.06 | ▲ +3.88% | ▲ +5.00% | $898.82 (+21.56%) |
Jun 2, 2026 17w ago | Insider Cluster | $736.15 $768.06 | ▲ +4.34% | ▲ +6.15% | $898.82 (+22.10%) |
May 27, 2026 18w ago | Insider Cluster | $756.13 $766.55 | ▲ +1.38% | ▲ +3.67% | $898.82 (+18.87%) |
May 27, 2026 18w ago | Insider Cluster | $756.13 $766.55 | ▲ +1.38% | ▲ +3.67% | $898.82 (+18.87%) |
US Market Status
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