Initial Statement of Beneficial Ownership (3)

FORM 3	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES	OMB APPROVAL OMB Number: 3235-0104 Estimated average burden hours per response... 0.5
	Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

1. Name and Address of Reporting Person ^*

Duenas Jose A

2. Date of Event Requiring Statement (MM/DD/YYYY) 8/8/2017

3. Issuer Name and Ticker or Trading Symbol

SONIC CORP [SONC]

(Last) (First) (Middle)

300 JOHNNY BENCH DRIVE

4. Relationship of Reporting Person(s) to Issuer (Check all applicable)

_____ Director _____ 10% Owner
___ X ___ Officer (give title below) _____ Other (specify below)
Executive Vice President /

(Street)

OKLAHOMA CITY, OK 73104

(City) (State) (Zip)

5. If Amendment, Date Original Filed (MM/DD/YYYY)

6. Individual or Joint/Group Filing (Check Applicable Line)

_ X _ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1.Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Common Stock	0	D

*Table II - Derivative Securities Beneficially Owned ( e.g.* , puts, calls, warrants, options, convertible securities)**
1. Title of Derivate Security (Instr. 4)	2. Date Exercisable and Expiration Date (MM/DD/YYYY)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
1. Title of Derivate Security (Instr. 4)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	4. Conversion or Exercise Price of Derivative Security		6. Nature of Indirect Beneficial Ownership (Instr. 5)
Restricted Stock Units	⁽¹⁾	⁽¹⁾	Common Stock	10000	$0	D
Incentive Stock Option (right to buy)	⁽²⁾	8/9/2024	Common Stock	12720	$23.58	D
Non-qualified Stock Option (right to buy)	⁽²⁾	8/9/2024	Common Stock	23216	$23.58	D

Explanation of Responses:
(1)	The Shares will vest August 9, 2020 in accordance with the terms of the Restricted Stock Units granted August 9, 2017, and will be issued in shares of Sonic Corp. common stock on a one-for-one basis, subject to certain restrictions.
(2)	One-third of the total number of options granted on August 9, 2017 will vest on each of the first three anniversary dates following the grant date.

Reporting Owners
Reporting Owner Name / Address	Relationships
Reporting Owner Name / Address	Director	10% Owner	Officer	Other
Duenas Jose A 300 JOHNNY BENCH DRIVE OKLAHOMA CITY, OK 73104			Executive Vice President

Signatures
Carolyn C. Cummins for Jose A. Duenas		8/15/2017
^** Signature of Reporting Person		Date

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
*	If the form is filed by more than one reporting person, see Instruction 5(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).
Note:	File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number.