<SEC-DOCUMENT>0001411393-24-000001.txt : 20240206
<SEC-HEADER>0001411393-24-000001.hdr.sgml : 20240206
<ACCEPTANCE-DATETIME>20240206124354
ACCESSION NUMBER:		0001411393-24-000001
CONFORMED SUBMISSION TYPE:	144
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20240206
DATE AS OF CHANGE:		20240206

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			STEEL DYNAMICS INC
		CENTRAL INDEX KEY:			0001022671
		STANDARD INDUSTRIAL CLASSIFICATION:	STEEL WORKS, BLAST FURNACES  ROLLING MILLS (COKE OVENS) [3312]
		ORGANIZATION NAME:           	04 Manufacturing
		IRS NUMBER:				351929476
		STATE OF INCORPORATION:			IN
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		144
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	000-21719
		FILM NUMBER:		24599186

	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

REPORTING-OWNER:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Shaheen Gabriel
		CENTRAL INDEX KEY:			0001411393
		ORGANIZATION NAME:           	

	FILING VALUES:
		FORM TYPE:		144

	MAIL ADDRESS:	
		STREET 1:		1540 PARILLA CIRCLE
		CITY:			TRINITY
		STATE:			FL
		ZIP:			34655
</SEC-HEADER>
<DOCUMENT>
<TYPE>144
<SEQUENCE>1
<FILENAME>primary_doc.xml
<TEXT>
<XML>
<?xml version="1.0" encoding="UTF-8"?><edgarSubmission xmlns="http://www.sec.gov/edgar/ownership" xmlns:com="http://www.sec.gov/edgar/common">
  <headerData>
    <submissionType>144</submissionType>
    <filerInfo>
      <filer>
        <filerCredentials>
          <cik>0001411393</cik>
          <ccc>XXXXXXXX</ccc>
        </filerCredentials>
      </filer>
      <liveTestFlag>LIVE</liveTestFlag>



    </filerInfo>
  </headerData>
  <formData>
    <issuerInfo>
      <issuerCik>0001022671</issuerCik>
      <issuerName>STEEL DYNAMICS INC</issuerName>
      <secFileNumber>000-21719</secFileNumber>
      <issuerAddress>
        <com:street1>7575 W JEFFERSON BLVD</com:street1>
        <com:city>FORT WAYNE</com:city>
        <com:stateOrCountry>IN</com:stateOrCountry>
        <com:zipCode>46804</com:zipCode>
      </issuerAddress>
      <issuerContactPhone>260 459 3553</issuerContactPhone>
      <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>Shaheen Gabriel</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
      <relationshipsToIssuer>
        <relationshipToIssuer>Director</relationshipToIssuer>
      </relationshipsToIssuer>
    </issuerInfo>
    <securitiesInformation>
      <securitiesClassTitle>Common Stock $0.0025 Par Value</securitiesClassTitle>
      <brokerOrMarketmakerDetails>
        <name>Vanguard</name>
        <address>
          <com:street1>PO Box 2600</com:street1>
          <com:city>Valley Forge</com:city>
          <com:stateOrCountry>PA</com:stateOrCountry>
          <com:zipCode>19482</com:zipCode>
        </address>
      </brokerOrMarketmakerDetails>
      <noOfUnitsSold>2346</noOfUnitsSold>
      <aggregateMarketValue>285015.54</aggregateMarketValue>
      <noOfUnitsOutstanding>161816470</noOfUnitsOutstanding>
      <approxSaleDate>02/06/2024</approxSaleDate>
      <securitiesExchangeName>NASDAQ GLOBAL SELECT</securitiesExchangeName>
    </securitiesInformation>
    <securitiesToBeSold>
      <securitiesClassTitle>Common Stock $0.0025 Par Value</securitiesClassTitle>
      <acquiredDate>06/01/2022</acquiredDate>
      <natureOfAcquisitionTransaction>Restricted Stock Award</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>Steel Dynamics, Inc.</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>2346</amountOfSecuritiesAcquired>
      <paymentDate>06/01/2022</paymentDate>
      <natureOfPayment>Stock Award</natureOfPayment>
    </securitiesToBeSold>
    <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
    <noticeSignature>
      <noticeDate>02/06/2024</noticeDate>
      <signature>/s/ Gabe Shaheen</signature>
    </noticeSignature>
  </formData>
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