Monitor for updates on the scope of the breach and any subsequent regulatory or legal actions. The lack of material disruption and no disclosed financial exposure limits near-term impact, but further disclosures in upcoming filings could change the risk profile.
Price Chart
Executive Summary
Quest Diagnostics disclosed unauthorized access to its Quanum LSM system on October 21, 2026, potentially involving patient records. The company has initiated response procedures, notified law enforcement, and engaged external experts; operations remain undisrupted.
Key Facts
- Unauthorized access to Quanum LSM system discovered October 21, 2026
- Certain patient records believed accessed; full scope under investigation
- Business operations not materially disrupted; no financial exposure disclosed
- Federal law enforcement notified; external cybersecurity experts engaged
Financial Impact
No financial impact quantified in filing; potential future costs from remediation, litigation, or regulatory action not disclosed
Risk Factors
- Potential regulatory fines or penalties if patient data was compromised
- Possible class-action litigation from affected patients
- Reputational damage affecting client relationships and test order volumes
Investment Themes
Documents Analyzed
This report is based on 4 SEC documents filed with EDGAR.
| Document | Accession Number |
|---|---|
| 8-K Filing (Primary) | 0000947871-26-000941 |
| Document: 0000947871-26-000941-index-headers.html | 0000947871-26-000941 |
| Document: 0000947871-26-000941-index.html | 0000947871-26-000941 |
| Document: 0000947871-26-000941.txt | 0000947871-26-000941 |
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
Oct 27, 2026 today | Institutional Cluster | $241.96 | awaiting T+60 | awaiting T+60 | $242.56 (+0.25%) |
Oct 26, 2026 1d ago | 144 | $242.95 | awaiting T+60 | awaiting T+60 | $242.56 (−0.16%) |
Oct 22, 2026 5d ago | 8-K | $243.28 | awaiting T+60 | awaiting T+60 | $242.56 (−0.30%) |
Oct 22, 2026 5d ago | 8-K | $243.28 | awaiting T+60 | awaiting T+60 | $242.56 (−0.30%) |
Oct 6, 2026 21d ago | 8-K | $227.06 | awaiting T+60 | awaiting T+60 | $242.56 (+6.83%) |
Sep 22, 2026 5w ago | Press Release | $233.00 | awaiting T+60 | awaiting T+60 | $242.56 (+4.10%) |
Sep 9, 2026 6w ago | Press Release | $231.14 | awaiting T+60 | awaiting T+60 | $242.56 (+4.94%) |
Sep 3, 2026 7w ago | Insider Cluster | $236.26 | awaiting T+60 | awaiting T+60 | $242.56 (+2.67%) |
Jul 23, 2026 13w ago | 8-K | $227.90 $239.15 | ▲ +4.94% | ▲ +0.38% | $242.56 (+6.43%) |
May 8, 2026 24w ago | 8-K | $189.81 $235.84 | ▲ +24.25% | ▲ +19.86% | $242.56 (+27.79%) |
US Market Status
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