powerofattorney

0001022079-23-000111.txt : 20230519 0001022079-23-000111.hdr.sgml : 20230519 20230519181644 ACCESSION NUMBER: 0001022079-23-000111 CONFORMED SUBMISSION TYPE: 3 PUBLIC DOCUMENT COUNT: 4 CONFORMED PERIOD OF REPORT: 20230517 FILED AS OF DATE: 20230519 DATE AS OF CHANGE: 20230519 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: Diaz Luis CENTRAL INDEX KEY: 0001720081 FILING VALUES: FORM TYPE: 3 SEC ACT: 1934 Act SEC FILE NUMBER: 001-12215 FILM NUMBER: 23941874 MAIL ADDRESS: STREET 1: C/O JOUNCE THERAPEUTICS, INC. STREET 2: 780 MEMORIAL DRIVE CITY: CAMBRIDGE STATE: MA ZIP: 02138 ISSUER: COMPANY DATA: COMPANY CONFORMED NAME: QUEST DIAGNOSTICS INC CENTRAL INDEX KEY: 0001022079 STANDARD INDUSTRIAL CLASSIFICATION: SERVICES-MEDICAL LABORATORIES [8071] IRS NUMBER: 161387862 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 BUSINESS ADDRESS: STREET 1: 500 PLAZA DRIVE CITY: SECAUCUS STATE: NJ ZIP: 07094 BUSINESS PHONE: 9735202700 MAIL ADDRESS: STREET 1: 500 PLAZA DRIVE CITY: SECAUCUS STATE: NJ ZIP: 07094 FORMER COMPANY: FORMER CONFORMED NAME: CORNING CLINICAL LABORATORIES INC DATE OF NAME CHANGE: 19960903 3 1 wk-form3_1684534591.xml FORM 3 X0206 3 2023-05-17 1 0001022079 QUEST DIAGNOSTICS INC DGX 0001720081 Diaz Luis 500 PLAZA DRIVE SECAUCUS NJ 07094 1 0 0 0 Sean D. Mersten, Attorney in Fact for Luis A. Diaz, Jr., M.D. 2023-05-19 EX-24 2 powerofattorney_diazxsig.htm EX-24 powerofattorney_diazxsig

POWER OF ATTORNEY Know all by these presents that the undersigned hereby constitutes and appoints each of William J. O’Shaughnessy, Jr., Sean D. Mersten and Michael E. Prevoznik, signing singly, his/her true and lawful attorney-in-fact to: (1) execute for and on behalf of the undersigned Forms 3, 4 and 5 in accordance with Section 16(a) of the Securities Exchange Act of 1934 and the rules thereunder; (2) do and perform any and all acts for and on behalf of the undersigned which may be necessary or desirable to complete the execution of any such Form 3, 4 or 5 and the timely filing of such form with the United States Securities and Exchange Commission and any other authority; and (3) take any other action of any type whatsoever in connection with the foregoing which, in the opinion of such attorney-in- fact, may be of benefit to, in the best interest of, or legally required by, the undersigned, it being understood that the document executed pursuant to this Power of Attorney shall be in such form and shall contain such terms and conditions as such attorney-in-fact may approve in his/her discretion. The undersigned hereby grants to each such attorney-in-fact full power and authority to do and perform all and every act and thing whatsoever requisite, necessary and proper to be done in the exercise of any of the rights and powers herein granted, as fully to all intents and purposes as the undersigned might or could do if personally present, with full power of substitution or revocation, hereby ratifying and confirming all that such attorney-in-fact, or such attorney- in-fact’s substitute or substitutes shall lawfully do or cause to be done by virtue of this power of attorney and the rights and powers herein granted. The undersigned acknowledges that the foregoing attorneys-in-fact, in serving in such capacity at the request of the undersigned, are not assuming any of the undersigned’s responsibilities to comply with Section 16 of the Securities Exchange Act of 1934. IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be executed as of this __ day of ______________, 2023. Luis A. Diaz, Jr., M.D. STATE OF NEW YORK ) ) ss. COUNTY OF ______________ ) On this __ day of _________, 2023, before me, ____________________, the undersigned notary public, personally appeared Luis A. Diaz, Jr., M.D., proved to me on the basis of satisfactory evidence to be the person whose name is subscribed to the within instrument, and acknowledged to me that he executed the same for the purposes therein stated. Notary Public My Commission Expires: _______________ Denton Texas 15 May 15 May Latoya Lynn Reese, Notary Public 06/03/2025

This document is signed by Signatory CN=Latoya Lynn Reese, DNQ=A01410C00000185639CE1EF000CFCCF, O=Texas, C=US Date/Time Tue May 16 00:27:36 UTC 2023 Issuer-Certificate CN=IGC CA 1, OU=IdenTrust Global Common, O=IdenTrust, C=US Serial-No. 85078489479711402501072054503083873136 Method urn:adobe.com:Adobe.PPKLite:adbe.pkcs7.sha1 (Adobe Signature)