    <SEC-DOCUMENT>0000921895-16-006340-index.html : 20161214
    <SEC-HEADER>0000921895-16-006340.hdr.sgml : 20161214
    <ACCEPTANCE-DATETIME>20161214172139
    ACCESSION NUMBER:		0000921895-16-006340
    CONFORMED SUBMISSION TYPE:	SC 13D/A
    PUBLIC DOCUMENT COUNT:		2
    FILED AS OF DATE:		20161214
    DATE AS OF CHANGE:		20161214

    SUBJECT COMPANY:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			MEDIFAST INC
    		CENTRAL INDEX KEY:			0000910329
    		STANDARD INDUSTRIAL CLASSIFICATION:	MISCELLANEOUS FOOD PREPARATIONS & KINDRED PRODUCTS [2090]
    		IRS NUMBER:				133714405
    		STATE OF INCORPORATION:			DE
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		SC 13D/A
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	005-50217
    		FILM NUMBER:		162051834

    	BUSINESS ADDRESS:
    		STREET 1:		11445 CRONHILL DRIVE
    		CITY:			OWINGS MILLS
    		STATE:			MD
    		ZIP:			21117
    		BUSINESS PHONE:		7327640619

    	MAIL ADDRESS:
    		STREET 1:		11445 CRONHILL DRIVE
    		CITY:			OWINGS MILLS
    		STATE:			MD
    		ZIP:			21117

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	HEALTHRITE INC
    		DATE OF NAME CHANGE:	19951120

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	XX
    		DATE OF NAME CHANGE:	19950619

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	00
    		DATE OF NAME CHANGE:	19950619

    FILED BY:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			Engaged Capital LLC
    		CENTRAL INDEX KEY:			0001559771
    		IRS NUMBER:				454591052
    		STATE OF INCORPORATION:			DE
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		SC 13D/A

    	BUSINESS ADDRESS:
    		STREET 1:		610 NEWPORT CENTER DRIVE
    		STREET 2:		SUITE 250
    		CITY:			NEWPORT BEACH
    		STATE:			CA
    		ZIP:			92660
    		BUSINESS PHONE:		949-734-7900

    	MAIL ADDRESS:
    		STREET 1:		610 NEWPORT CENTER DRIVE
    		STREET 2:		SUITE 250
    		CITY:			NEWPORT BEACH
    		STATE:			CA
    		ZIP:			92660
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>SC 13D/A
    <SEQUENCE>1
    <FILENAME>sc13da509455006_12142016.htm
    <DESCRIPTION>AMENDMENT NO. 5 TO THE SCHEDULE 13D
    <TEXT>
    Document 1 - file: sc13da509455006_12142016.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>SC 13D/A
    <SEQUENCE>2
    <FILENAME>ex991to13da509455006_121416.pdf
    <DESCRIPTION>EX. 99.1 - PURCHASE TRADING PLAN AGREEMENT, DATED DECEMBER 14, 2016
    <TEXT>
    Document 2 - file: ex991to13da509455006_121416.pdf

    </DOCUMENT>
    </SEC-DOCUMENT>