<SEC-DOCUMENT>0001104659-21-043022-index.html : 20210329
<SEC-HEADER>0001104659-21-043022.hdr.sgml : 20210329
<ACCEPTANCE-DATETIME>20210329135157
ACCESSION NUMBER:		0001104659-21-043022
CONFORMED SUBMISSION TYPE:	DEFA14A
PUBLIC DOCUMENT COUNT:		3
FILED AS OF DATE:		20210329
DATE AS OF CHANGE:		20210329

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:		21780969

	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>
<DOCUMENT>
<TYPE>DEFA14A
<SEQUENCE>1
<FILENAME>tm212385d3_defa14a.htm
<DESCRIPTION>DEFA14A
<TEXT>
Document 1 - file: tm212385d3_defa14a.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>2
<FILENAME>tm212385d3_defa14a-img01.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 2 - file: tm212385d3_defa14a-img01.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>3
<FILENAME>tm212385d3_defa14a-img02.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 3 - file: tm212385d3_defa14a-img02.jpg

</DOCUMENT>
</SEC-DOCUMENT>