Form DEFA14A QUEST DIAGNOSTICS INC

April 6, 2026 4:34 PM EDT

SCHEDULE 14A INFORMATION
Proxy Statement Pursuant to Section 14(a) of the
Securities Exchange Act of 1934
(Amendment No. )
Filed by the Registrant ☒
Filed by a Party other than the Registrant  ☐
 
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Preliminary Proxy Statement

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Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))

 
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Definitive Proxy Statement

 
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Definitive Additional Materials

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Soliciting Material Pursuant to §240.14a-12

Quest Diagnostics Incorporated
(Name of Registrant as Specified In Its Charter)


(Name of Person(s) Filing Proxy Statement, if other than the Registrant)

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  ☐ Fee paid previously with preliminary materials 

  ☐ Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules 14a-6(i)(1) and 0-11.  









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