<SEC-DOCUMENT>0001104659-17-019551-index.html : 20170328
<SEC-HEADER>0001104659-17-019551.hdr.sgml : 20170328
<ACCEPTANCE-DATETIME>20170328101825
ACCESSION NUMBER:		0001104659-17-019551
CONFORMED SUBMISSION TYPE:	DEFA14A
PUBLIC DOCUMENT COUNT:		5
FILED AS OF DATE:		20170328
DATE AS OF CHANGE:		20170328
EFFECTIVENESS DATE:		20170328

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			STEEL DYNAMICS INC
		CENTRAL INDEX KEY:			0001022671
		STANDARD INDUSTRIAL CLASSIFICATION:	STEEL WORKS, BLAST FURNACES  ROLLING MILLS (COKE OVENS) [3312]
		IRS NUMBER:				351929476
		STATE OF INCORPORATION:			IN
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		DEFA14A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-21719
		FILM NUMBER:		17717704

	BUSINESS ADDRESS:	
		STREET 1:		7575 W JEFFERSON BLVD
		CITY:			FORT WAYNE
		STATE:			IN
		ZIP:			46804
		BUSINESS PHONE:		260 459 3553

	MAIL ADDRESS:	
		STREET 1:		7575 W JEFFERSON BLVD
		CITY:			FORT WAYNE
		STATE:			IN
		ZIP:			46804
</SEC-HEADER>
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<SEQUENCE>1
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<DESCRIPTION>DEFA14A
<TEXT>
Document 1 - file: a17-2259_3defa14a.htm

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Document 2 - file: g22593bci001.gif

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<SEQUENCE>3
<FILENAME>g22593bci002.gif
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<TEXT>
Document 3 - file: g22593bci002.gif

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<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>4
<FILENAME>g22593bci003.gif
<DESCRIPTION>GRAPHIC
<TEXT>
Document 4 - file: g22593bci003.gif

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>5
<FILENAME>g22593bci004.gif
<DESCRIPTION>GRAPHIC
<TEXT>
Document 5 - file: g22593bci004.gif

</DOCUMENT>
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