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 * Britten Michelle E   2. Issuer Name and Ticker or Trading Symbol SONIC CORP [SONC] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) VP & Chief Accounting Officer (Last) (First) (Middle) 300 JOHNNY BENCH DRIVE 3. Date of Earliest Transaction (Month/Day/Year) 12/07/2018 (Street) OKLAHOMA CITY, OK 73104 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 12/07/2018   D(1)   8,621 D $ 43.5 0 D

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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

Incentive stock option (right to buy)

$ 11.07

12/07/2018

D(1)

12,076

(2)

01/16/2020

Common Stock

12,076

$ 43.5

0

D

Incentive stock option (right to buy)

$ 20.58

12/07/2018

D(1)

4,263

(2)

01/16/2021

Common Stock

4,263

$ 43.5

0

D

Stock option (right to buy) (3)

$ 31.29

12/07/2018

D(1)

3,700

(2)

01/29/2022

Common Stock

3,700

$ 43.5

0

D

Stock option (right to buy) (3)

$ 29.37

12/07/2018

D(1)

4,592

(2)

01/28/2023

Common Stock

4,592

$ 43.5

0

D

Stock option (right to buy) (3)

$ 25.4

12/07/2018

D(1)

7,416

(2)

01/19/2024

Common Stock

7,416

$ 43.5

0

D

Stock option (right to buy) (3)

$ 25.84

12/07/2018

D(1)

7,845

(2)

01/31/2025

Common Stock

7,845

$ 43.5

0

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Britten Michelle E 300 JOHNNY BENCH DRIVE OKLAHOMA CITY, OK 73104			VP & Chief Accounting Officer

Signatures

Carolyn C. Cummins for Michelle E. Britten		12/07/2018
**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)	Disposed of as a result of the merger pursuant to the previously announced Agreement and Plan of Merger, dated September 24, 2018, by and among the issuer, Inspire Brands, Inc. and SSK Merger Sub, Inc.
(2)	Fully vested.
(3)	Previously, ISOs and NQs were reported as separate awards but are combined in this final Form 4 into one award by issue date.

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