Sec Form 4 Filing - Doherty Catherine T. @ QUEST DIAGNOSTICS INC - 2017-06-19

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person Doherty Catherine T. 2. Issuer Name and Ticker or Trading Symbol QUEST DIAGNOSTICS INC [ DGX] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) SVP, Group Exec. Clin. Fran. (Last) (First) (Middle) C/O QUEST DIAGNOSTICS INCORPORATED, 3 GIRALDA FARMS 3. Date of Earliest Transaction (MM/DD/YY) 06/19/2017 (Street) MADISON, NJ07940 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 06/19/2017 M( 1 ) 9,167 A $ 57.35 78,582 D Common Stock 06/19/2017 M( 1 ) 44,000 A $ 57.605 122,582 D Common Stock 06/19/2017 M( 1 ) 6,595 A $ 56.12 129,177 D Common Stock 06/19/2017 S( 1 ) 8,852 D $ 107.542 ( 2 ) 120,325 D Common Stock 06/19/2017 S( 1 ) 315 D $ 108.156 ( 3 ) 120,010 D Common Stock 06/19/2017 S( 1 ) 42,636 D $ 107.52 ( 4 ) 77,374 D Common Stock 06/19/2017 S( 1 ) 1,364 D $ 108.141 ( 5 ) 76,010 D Common Stock 06/19/2017 S( 1 ) 6,418 D $ 107.544 ( 4 ) 69,592 D Common Stock 06/19/2017 S( 1 ) 177 D $ 108.15 69,415 D Common Stock 3,780 ( 6 ) I 401(k)/SDCP

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares Stock Options (Right to Buy) $ 57.35 06/19/2017 M( 1 ) 9,167 ( 7 ) 05/16/2021 Common Stock 9,167 $ 57.345 0 D Stock Options (Right to Buy) $ 57.605 06/19/2017 M( 1 ) 44,000 ( 8 ) 02/27/2022 Common Stock 44,000 $ 57.605 0 D Stock Options (Right to Buy) $ 56.12 06/19/2017 M( 1 ) 6,595 ( 9 ) 02/25/2023 Common Stock 6,595 $ 56.12 0 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Doherty Catherine T. C/O QUEST DIAGNOSTICS INCORPORATED 3 GIRALDA FARMS MADISON, NJ07940 SVP, Group Exec. Clin. Fran. Signatures /s/ William J. O'Shaughnessy, Jr., Attorney in Fact for Catherine T. Doherty 06/21/2017 Signature of Reporting Person Date

Explanation of Responses:

( 1 )This exercise and sale reported were effected pursuant to a Rule 10b5-1 sales plan adopted by the reporting person on May 18, 2017. ( 2 )This transaction was executed in multiple trades at prices ranging from $107.14 to $108.12. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected. ( 3 )This transaction was executed in multiple trades at prices ranging from $108.15 to $108.16. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected. ( 4 )This transaction was executed in multiple trades at prices ranging from $107.12 to $108.11. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected. ( 5 )This transaction was executed in multiple trades at prices ranging from $108.12 to $108.16. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected. ( 6 )These underlying shares were acquired on a periodic basis by the trustee of the Company's tax qualified Profit Sharing (401(k)) and/or Supplemental Deferred Compensation Plan. The information was obtained from the plan administrator as of a current date. The number of shares is based on the account balance of the Company stock fund under each Plan (which includes some money ma rket instruments) divided by the market price of the Company's stock as of that date. ( 7 )The options vested in three annual installments beginning with the first on May 16, 2012, the second on May 16, 2013 and the final on May 16, 2014. ( 8 )The options vested in three annual installments beginning with the first on February 27, 2013, the second on February 27, 2014 and the final on February 27, 2015. ( 9 )The options vested in three annual installments beginning with the first on February 25, 2014, the second on February 25, 2015 and the final on February 25, 2016.

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