Flash FinanceUS
After hours S&P 5007,549.94+2.35% Nasdaq25,253.14+2.74% Dow 3052,389.75+2.15% Russell 20002,840.81+3.15% Nasdaq-10027,907.62+3.40% MidCap 4003,715.23+3.13% SmallCap 6001,722.37+2.89% VIX19.92-22.31% 10Y Yield4.86+0.10% Close of Nov 09, 2026
AI brief of an SEC Form 8-K · Quest Diagnostics (DGX)

Quest Diagnostics discloses unauthorized access to Quanum LSM system, patient records affected

Negative Impact 5 of 5 legal/regulatory

Quest Diagnostics said on October 21, 2026 it learned of unauthorized access to its Quanum LSM system, which clients use to place test orders and look up results. The company believes an unauthorized party accessed certain patient records, and the full scope is still under investigation. The company said the incident has not materially disrupted its business operations or its ability to serve patients.

Key points

  • Unauthorized access to Quanum LSM system discovered October 21, 2026
  • Company believes certain patient records were accessed; full scope under investigation
  • Federal law enforcement notified and external cybersecurity experts engaged
  • Company states business operations and patient service not materially disrupted

The filing

CompanyQuest Diagnostics (DGX)
Form8-K, current report
Filed with the SECOct 22, 2026, 6:53 AM ET
Accession number0000947871-26-000941

Items reported: 8.01 Other Events

Read the filing on SEC.gov ↗

Written by AI on Nov 7, 2026, 11:17 PM ET, from this filing only.

Briefs are written by AI from the filing text and can contain mistakes — open the filing before acting on anything. Impact (1-5) and tone are the AI's reading of the filing for shareholders, not a price forecast. Not investment advice.