<SEC-DOCUMENT>0001140361-18-002649.txt : 20180119
<SEC-HEADER>0001140361-18-002649.hdr.sgml : 20180119
<ACCEPTANCE-DATETIME>20180119182647
ACCESSION NUMBER:		0001140361-18-002649
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20180117
FILED AS OF DATE:		20180119
DATE AS OF CHANGE:		20180119

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			ZOMMER NATHAN
		CENTRAL INDEX KEY:			0001071349

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-20388
		FILM NUMBER:		18538426

	MAIL ADDRESS:	
		STREET 1:		C/O IXYS CORP
		STREET 2:		3540 BASSET STREET
		CITY:			SANTA CLARA
		STATE:			CA
		ZIP:			85054

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			LITTELFUSE INC /DE
		CENTRAL INDEX KEY:			0000889331
		STANDARD INDUSTRIAL CLASSIFICATION:	SWITCHGEAR & SWITCHBOARD APPARATUS [3613]
		IRS NUMBER:				363795742
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		8755 WEST HIGGINS ROAD
		CITY:			CHICAGO
		STATE:			IL
		ZIP:			60631
		BUSINESS PHONE:		773-628-1000

	MAIL ADDRESS:	
		STREET 1:		8755 WEST HIGGINS ROAD
		CITY:			CHICAGO
		STATE:			IL
		ZIP:			60631
</SEC-HEADER>
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    <footnotes>
        <footnote id="F1">These shares of Littelfuse, Inc. common stock are the shares that were received in exchange for IXYS Corporation common stock in connection with the acquisition of IXYS Corporation by Littelfuse, Inc. (the &quot;Merger&quot;), at an exchange ratio of 0.1265 of a share of Littelfuse, Inc. common stock per share of IXYS Corporation common stock.</footnote>
        <footnote id="F2">These shares of Littelfuse, Inc. common stock are the shares that were received in exchange for IXYS Corporation common stock in connection with the acquisition of IXYS Corporation by Littelfuse, Inc. (the &quot;Merger&quot;), at an exchange ratio of 0.1265 of a share of Littelfuse, Inc. common stock per share of IXYS Corporation common stock.</footnote>
        <footnote id="F3">Received pursuant to the Merger in exchange for an employee stock option to acquire 170,000 shares of IXYS Corporation common stock for $12.65 per share.</footnote>
        <footnote id="F4">Received pursuant to the Merger in exchange for an employee stock option to acquire 20,000 shares of IXYS Corporation common stock for $9.37 per share.</footnote>
        <footnote id="F5">Received pursuant to the Merger in exchange for an employee stock option to acquire 20,000 shares of IXYS Corporation common stock for $12.25 per share.</footnote>
        <footnote id="F6">Received pursuant to the Merger in exchange for an employee stock option to acquire 5,000 shares of IXYS Corporation common stock for $9.45 per share.</footnote>
        <footnote id="F7">Received pursuant to the Merger in exchange for an employee stock option to acquire 5,000 shares of IXYS Corporation common stock for $9.27 per share.</footnote>
        <footnote id="F8">Received pursuant to the Merger in exchange for an employee stock option to acquire 5,000 shares of IXYS Corporation common stock for $11.83 per share.</footnote>
        <footnote id="F9">Received pursuant to the Merger in exchange for an employee stock option to acquire 5,000 shares of IXYS Corporation common stock for $11.14 per share.</footnote>
        <footnote id="F10">Received pursuant to the Merger in exchange for an employee stock option to acquire 5,000 shares of IXYS Corporation common stock for $11.58 per share.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>Hans Weinburger, by power of attorney</signatureName>
        <signatureDate>2018-01-19</signatureDate>
    </ownerSignature>
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