Quest Diagnostics files 8-K Item 8.01 cybersecurity incident disclosure

What's on the official record

Quest Diagnostics Inc. (DGX) filed a Form 8-K with the SEC on 22 October 2026, accession number 0000947871-26-000941. The filing reports Item 8.01 (other events). The indexed row carries filing facts only — form 8-K, filing date, Item number, CIK 0001022079, state NJ, SIC 8071 — and states no cause, attacker, data type, customer impact, or loss. The filing text at the accession number is the record for those.

Assessment

For a deal team, the record lets you scope diligence on the filing text at the accession number before pricing or conditioning a transaction involving the filer. The row confirms the form, the Item 8.01 classification, and the filing date, but nothing about the underlying event, so the filing text is the next document to read. Whether to walk is a decision the record does not resolve on its own.

For a credit committee, the record lets you decide whether to monitor the filer and request the filing text before pricing or covenanting new exposure. The row establishes that a Form 8-K was filed under Item 8.01 on 22 October 2026, and nothing more about the event. The filing text is the record for any cause, data type, or impact that would bear on a lending decision.

What would change this call

The filing text at the accession number, which the indexed row does not carry, would change this call by stating the cause, data type, customer impact, or loss behind the Item 8.01 disclosure.

What to check next

Confidence

Filed 25 October 2026 from the record dated 22 October 2026.

Sources

[1] QUEST DIAGNOSTICS INC (DGX) — 8-K Item 8.01 (cybersecurity incident, voluntary) — https://www.sec.gov/Archives/edgar/data/1022079/000094787126000941/0000947871-26-000941-index.htm