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 OF SECURITIES 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 * Cunningham Everett   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, Commercial (Last) (First) (Middle) 500 PLAZA DRIVE 3. Date of Earliest Transaction (Month/Day/Year) 07/02/2018 (Street) SECAUCUS, NJ 07094 4. If Amendment, Date Original Filed(Month/Day/Year) 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 (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 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 07/02/2018   M(1)   21,294 A $ 52.165 67,210 D   Common Stock 07/02/2018   S(1)   19,798 D $ 109.642 (2) 47,412 D   Common Stock 07/02/2018   S(1)   1,496 D $ 110.122 (3) 45,916 D   Common Stock 07/02/2018   M(1)   38,928 A $ 66.51 84,844 D   Common Stock 07/02/2018   S(1)   33,345 D $ 109.596 (4) 51,499 D   Common Stock 07/02/2018   S(1)   5,583 D $ 110.066 (5) 45,916 D   Common Stock 07/02/2018   S(1)   7,066 D $ 109.627 (6) 38,850 D   Common Stock 07/02/2018   S(1)   781 D $ 110.124 (7) 38,261 (8) D   Common Stock               616 (9) I 401(k)

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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 (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

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 (Month/Day/Year)

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

Non-Qualifed Stock Option (right to buy)

$ 52.165

07/02/2018

M(1)

21,294

(10)

02/13/2024

Common Stock

21,294

$ 52.165

0

D

Non-Qualifed Stock Option (right to buy)

$ 66.51

07/02/2018

M(1)

38,928

(11)

02/25/2026

Common Stock

38,928

$ 66.51

19,464

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Cunningham Everett 500 PLAZA DRIVE SECAUCUS, NJ 07094			SVP, Commercial

Signatures

William J. O'Shaughnessy, Jr., Attorney in Fact for Everett Cunningham		07/05/2018
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 4(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	This exercise and sale reported were effected pursuant to a Rule 10b5-1 sales plan adopted by the reporting person on May 31, 2018.
(2)	This transaction was executed in multiple trades at prices ranging from $109.07 to $110.06. 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 $110.07 to $110.22. 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 $109.00 to $110.00. 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 $110.00 to $110.25. 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)	This transaction was executed in multiple trades at prices ranging from $109.08 to $110.04. 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.
(7)	This transaction was executed in multiple trades at prices ranging from $110.08 to $110.19. 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.
(8)	The amount includes exempt purchases made under the Company's stock purchase plan since the date of the last filing on Form 4.
(9)	These underlying shares were acquired on a periodic basis by the trustee of the Company's tax qualified Profit Sharing (401(k)) 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 the Plan (which includes some money market instruments) divided by the market price of the Company's stock as of that date.
(10)	The options vested in three equal annual installments beginning with the first on February 13, 2015, the second on February 13, 2016 and the final on February 13, 2017.
(11)	The options vest in three equal annual installments beginning on the first annual anniversary of the grant date.

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