Beneficial Ownership Report · SCHEDULE 13G
Quest Diagnostics Inc.
DGXNYSEEQUITYCurrent
Beneficial Ownership Report
Structured filing — SCHEDULE 13G
primary_doc.xml
Subject company
- Company
- QUEST DIAGNOSTICS INC
- Company CIK
- 0001022079
- Street
- 500 PLAZA DRIVE
- City
- SECAUCUS
- State / country code
- NJ
- Postal code
- 07094
Statement details
- Security class
- COMMON STOCK
- Event date
- 09/30/2026
- Rule designation
- Rule 13d-1(b)
Reporting person 1
- Name
- STATE STREET CORPORATION
- Citizenship / organization
- MA
- Reporting person type
- HC
- Aggregate amount owned
- 5,563,421.00
- Percent of class
- 5
- Sole voting power
- 0.00
- Shared voting power
- 3,406,108.00
- Sole dispositive power
- 0.00
- Shared dispositive power
- 5,557,626.00
- Aggregate excludes certain shares
- N
Item 1
Issuer
QUEST DIAGNOSTICS INC
Principal executive office address
500 PLAZA DRIVE, SECAUCUS, NEW JERSEY, 07094
Item 2
Citizenship
MA
Filing person
STATE STREET CORPORATION;
Principal business or residence address
ONE CONGRESS STREET, SUITE 1, BOSTON MA 02114, UNITED STATES
Item 3
Not applicable indication
N
Type of filing person
IA · HC
Item 4
Percent of class
5
Amount beneficially owned
5563421.00
Sole voting power
0
Shared voting power
3,406,108
Sole dispositive power
0
Shared dispositive power
5,557,626
Item 5
Not applicable indication
Y
Ownership of 5% or less
N
Item 6
Not applicable indication
N
Ownership on behalf of another person
NOT APPLICABLE
Item 7
Not applicable indication
N
Subsidiaries
SSGA FUNDS MANAGEMENT, INC. (IA);STATE STREET GLOBAL ADVISORS (JAPAN) CO., LTD. (IA);STATE STREET GLOBAL ADVISORS ASIA LIMITED (IA);STATE STREET GLOBAL ADVISORS EUROPE LIMITED (IA);STATE STREET GLOBAL ADVISORS LIMITED (IA);STATE STREET GLOBAL ADVISORS SINGAPORE LIMITED (IA);STATE STREET GLOBAL ADVISORS TRUST COMPANY (IA);STATE STREET GLOBAL ADVISORS, AUSTRALIA, LIMITED (IA);STATE STREET GLOBAL ADVISORS, LTD. (IA);STATE STREET SAUDI ARABIA FINANCIAL SOLUTIONS COMPANY (IA);
Item 8
Not applicable indication
N
Group members
NOT APPLICABLE
Item 9
Not applicable indication
N
Item 10
Not applicable indication
N
Certifications
By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11.
Signature 1
- Reporting person
- STATE STREET CORPORATION
- Signed
- ALOK MAHESHWARY
- Title
- SENIOR VICE PRESIDENT
- Date
- 11/09/2026
Company context
Quest Diagnostics works across healthcare to create a healthier world, one life at a time. We help connect people, from clinicians to consumers, with laboratory insights that illuminate a path to better health. With a focus on delivering smarter, simpler testing, our insights reveal new avenues to identify and treat disease, inspire healthy behaviors and improve healthcare management. Quest Diagnostics serves half the physicians and hospitals in the United States and one in three adult Americans each year, and our nearly 60,000 employees work together to deliver diagnostic insights that inspire actions to transform lives. www. QuestDiagnostics.com.