<SEC-DOCUMENT>0000807985-17-000044-index.html : 20171218
<SEC-HEADER>0000807985-17-000044.hdr.sgml : 20171218
<ACCEPTANCE-DATETIME>20171218160255
ACCESSION NUMBER:		0000807985-17-000044
CONFORMED SUBMISSION TYPE:	SC 13D
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20171218
DATE AS OF CHANGE:		20171218

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			SONIC CORP
		CENTRAL INDEX KEY:			0000868611
		STANDARD INDUSTRIAL CLASSIFICATION:	RETAIL-EATING PLACES [5812]
		IRS NUMBER:				731371046
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			0816

	FILING VALUES:
		FORM TYPE:		SC 13D
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-41654
		FILM NUMBER:		171261398

	BUSINESS ADDRESS:	
		STREET 1:		300 JOHNNY BENCH DRIVE
		CITY:			OKLAHOMA CITY
		STATE:			OK
		ZIP:			73104
		BUSINESS PHONE:		4052255000

	MAIL ADDRESS:	
		STREET 1:		300 JOHNNY BENCH DRIVE
		CITY:			OKLAHOMA CITY
		STATE:			OK
		ZIP:			73104

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			SOUTHEASTERN ASSET MANAGEMENT INC/TN/
		CENTRAL INDEX KEY:			0000807985
		STANDARD INDUSTRIAL CLASSIFICATION:	UNKNOWN SIC - 0000 [0000]
		IRS NUMBER:				620951781
		STATE OF INCORPORATION:			TN
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13D

	BUSINESS ADDRESS:	
		STREET 1:		6410 POPLAR AVENUE STE 900
		CITY:			MEMPHIS
		STATE:			TN
		ZIP:			38119
		BUSINESS PHONE:		9017612474

	MAIL ADDRESS:	
		STREET 1:		6410 POPLAR AVENUE
		STREET 2:		SUITE 900
		CITY:			MEMPHIS
		STATE:			TN
		ZIP:			38119

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	PROFESSIONAL PORTFOLIO MANAGEMENT INC
		DATE OF NAME CHANGE:	19890314

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	SOUTHEASTERN ASSET MANAGEMENT INC
		DATE OF NAME CHANGE:	19880622
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13D
<SEQUENCE>1
<FILENAME>sonc13d.txt
<DESCRIPTION>SONIC INC. - INITIAL 13D
<TEXT>
Document 1 - file: sonc13d.txt

</DOCUMENT>
</SEC-DOCUMENT>