QUEST DIAGNOSTICS INC (DGX) · Insider Trading (Form 4) SEC Filing

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-07-22 10b5-1 Pre-arranged Plan: No --- Issuer --- Name: QUEST DIAGNOSTICS INC (DGX) CIK: 0001022079 --- Reporting Owner --- Name: MAIN TIMOTHY L CIK: 0001196744 Role: Director --- Non-Derivative Transactions --- [Transaction #1] Security: Common Stock Date: 2026-07-22 | Code: L Shares: +21 | Price: $206.81 Total Value: $4,343.01 Shares Owned After: 22,460 | Ownership: D (Direct) Footnotes: [F1] Reflects shares that were acquired pursuant to a dividend reinvestment plan administered by the reporting person's broker and eligible for deferred reporting on Form 5 under Rule 16a-6. The reporting person has chosen to report such transaction early on this Form 4. --- Holdings --- [Holding #1] Security: Common Stock Ownership: I (Indirect) --- Footnotes (Complete Index) --- F1: Reflects shares that were acquired pursuant to a dividend reinvestment plan administered by the reporting person's broker and eligible for deferred reporting on Form 5 under Rule 16a-6. The reporting person has chosen to report such transaction early on this Form 4. --- Signature --- /s/ Sean D. Mersten, Attorney in Fact for Timothy L. Main (2026-07-27)