<SEC-DOCUMENT>0001126328-18-000062-index.html : 20180207
<SEC-HEADER>0001126328-18-000062.hdr.sgml : 20180207
<ACCEPTANCE-DATETIME>20180207150125
ACCESSION NUMBER:		0001126328-18-000062
CONFORMED SUBMISSION TYPE:	SC 13G/A
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20180207
DATE AS OF CHANGE:		20180207

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			KOSS CORP
		CENTRAL INDEX KEY:			0000056701
		STANDARD INDUSTRIAL CLASSIFICATION:	HOUSEHOLD AUDIO & VIDEO EQUIPMENT [3651]
		IRS NUMBER:				391168275
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			0630

	FILING VALUES:
		FORM TYPE:		SC 13G/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-20001
		FILM NUMBER:		18580778

	BUSINESS ADDRESS:	
		STREET 1:		4129 N PORT WASHINGTON AVE
		CITY:			MILWAUKEE
		STATE:			WI
		ZIP:			53212
		BUSINESS PHONE:		4149645000

	MAIL ADDRESS:	
		STREET 1:		4129 N PORT WASHINGTON AVE
		CITY:			MILWAUKEE
		STATE:			WI
		ZIP:			53212

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	KOSS ELECTRONICS INC
		DATE OF NAME CHANGE:	19721005

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	REK O KUT CO INC
		DATE OF NAME CHANGE:	19680124

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			PRINCIPAL FINANCIAL GROUP INC
		CENTRAL INDEX KEY:			0001126328
		STANDARD INDUSTRIAL CLASSIFICATION:	ACCIDENT & HEALTH INSURANCE [6321]
		IRS NUMBER:				421520346
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G/A

	BUSINESS ADDRESS:	
		STREET 1:		711 HIGH STREET
		CITY:			DES MOINES
		STATE:			IA
		ZIP:			50392
		BUSINESS PHONE:		5152475111

	MAIL ADDRESS:	
		STREET 1:		711 HIGH STREET
		CITY:			DES MOINES
		STATE:			IA
		ZIP:			50392
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13G/A
<SEQUENCE>1
<FILENAME>a13gakosscorporationamdt41.htm
<DESCRIPTION>KOSS CORPORATION AMDT 4 123117
<TEXT>
Document 1 - file: a13gakosscorporationamdt41.htm

</DOCUMENT>
</SEC-DOCUMENT>