<SEC-DOCUMENT>0001050442-24-000022.txt : 20241114
<SEC-HEADER>0001050442-24-000022.hdr.sgml : 20241114
<ACCEPTANCE-DATETIME>20241114162437
ACCESSION NUMBER:		0001050442-24-000022
CONFORMED SUBMISSION TYPE:	SCHEDULE 13G/A
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20241114

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			GEOSPACE TECHNOLOGIES CORP
		CENTRAL INDEX KEY:			0001001115
		STANDARD INDUSTRIAL CLASSIFICATION:	MEASURING & CONTROLLING DEVICES, NEC [3829]
		ORGANIZATION NAME:           	08 Industrial Applications and Services
		IRS NUMBER:				760447780
		STATE OF INCORPORATION:			TX
		FISCAL YEAR END:			0930

	FILING VALUES:
		FORM TYPE:		SCHEDULE 13G/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-52075
		FILM NUMBER:		241462880

	BUSINESS ADDRESS:	
		STREET 1:		7007 PINEMONT DR.
		CITY:			HOUSTON
		STATE:			TX
		ZIP:			77040
		BUSINESS PHONE:		7139864444

	MAIL ADDRESS:	
		STREET 1:		7007 PINEMONT DR.
		CITY:			HOUSTON
		STATE:			TX
		ZIP:			77040

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	OYO GEOSPACE CORP
		DATE OF NAME CHANGE:	19950919

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			DISCIPLINED GROWTH INVESTORS INC /MN
		CENTRAL INDEX KEY:			0001050442
		ORGANIZATION NAME:           	
		IRS NUMBER:				411901233
		STATE OF INCORPORATION:			MN
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SCHEDULE 13G/A

	BUSINESS ADDRESS:	
		STREET 1:		150 S 5TH ST
		STREET 2:		SUITE 2550
		CITY:			MINNEAPOLIS
		STATE:			MN
		ZIP:			55402
		BUSINESS PHONE:		6123174100

	MAIL ADDRESS:	
		STREET 1:		150 S. FIFTH ST
		STREET 2:		SUITE 2550
		CITY:			MINNEAPOLIS
		STATE:			MN
		ZIP:			55402
</SEC-HEADER>
<DOCUMENT>
<TYPE>SCHEDULE 13G/A
<SEQUENCE>1
<FILENAME>primary_doc.xml
<TEXT>
<XML>
<?xml version="1.0" encoding="UTF-8"?><edgarSubmission xmlns="http://www.sec.gov/edgar/schedule13g" xmlns:com="http://www.sec.gov/edgar/common">
  <headerData>
    <submissionType>SCHEDULE 13G/A</submissionType>
    <previousAccessionNumber>0001050442-21-000012</previousAccessionNumber>
    <filerInfo>
      <filer>
        <filerCredentials>
          <cik>0001050442</cik>
          <ccc>XXXXXXXX</ccc>
        </filerCredentials>
      </filer>
      <liveTestFlag>LIVE</liveTestFlag>


    </filerInfo>
  </headerData>
  <formData>
    <coverPageHeader>
      <amendmentNo>4</amendmentNo>
      <securitiesClassTitle>Class A Common Stock</securitiesClassTitle>
      <eventDateRequiresFilingThisStatement>09/30/2024</eventDateRequiresFilingThisStatement>
      <issuerInfo>
        <issuerCik>0001001115</issuerCik>
        <issuerName>GEOSPACE TECHNOLOGIES CORP</issuerName>
        <issuerCusip>37364X109</issuerCusip>
        <issuerPrincipalExecutiveOfficeAddress>
          <com:street1>7007 PINEMONT DR.</com:street1>
          <com:street2>7007 PINEMONT DR.</com:street2>
          <com:city>HOUSTON</com:city>
          <com:stateOrCountry>TX</com:stateOrCountry>
          <com:zipCode>77040</com:zipCode>
        </issuerPrincipalExecutiveOfficeAddress>
      </issuerInfo>
      <designateRulesPursuantThisScheduleFiled>
        <designateRulePursuantThisScheduleFiled>Rule 13d-1(b)</designateRulePursuantThisScheduleFiled>
      </designateRulesPursuantThisScheduleFiled>
    </coverPageHeader>
    <coverPageHeaderReportingPersonDetails>

      <reportingPersonName>DISCIPLINED GROWTH INVESTORS INC /MN</reportingPersonName>
      <citizenshipOrOrganization>MN</citizenshipOrOrganization>
      <reportingPersonBeneficiallyOwnedNumberOfShares>
        <soleVotingPower>1556040.00</soleVotingPower>
        <sharedVotingPower>0.00</sharedVotingPower>
        <soleDispositivePower>1556040.00</soleDispositivePower>
        <sharedDispositivePower>0.00</sharedDispositivePower>
      </reportingPersonBeneficiallyOwnedNumberOfShares>
      <reportingPersonBeneficiallyOwnedAggregateNumberOfShares>1556040.00</reportingPersonBeneficiallyOwnedAggregateNumberOfShares>
      <classPercent>12.1</classPercent>
      <typeOfReportingPerson>IA</typeOfReportingPerson>
    </coverPageHeaderReportingPersonDetails>
    <items>
      <item1>
        <issuerName>GEOSPACE TECHNOLOGIES CORP</issuerName>
        <issuerPrincipalExecutiveOfficeAddress>7007 PINEMONT DR., 7007 PINEMONT DR., HOUSTON, TEXAS, 77040.</issuerPrincipalExecutiveOfficeAddress>
      </item1>
      <item2>
        <filingPersonName>Disciplined Growth Investors, Inc</filingPersonName>
        <principalBusinessOfficeOrResidenceAddress>150 South Fifth Street, Suite 2550, Minneapolis, MN 55402</principalBusinessOfficeOrResidenceAddress>
        <citizenship>Minnesota Corporation</citizenship>
      </item2>
      <item3>
        <notApplicableFlag>N</notApplicableFlag>
        <typeOfPersonFiling>IA</typeOfPersonFiling>
      </item3>
      <item4>
        <amountBeneficiallyOwned>1,556,040
</amountBeneficiallyOwned>
        <classPercent>12.05%</classPercent>
        <numberOfSharesPersonHas>
          <solePowerOrDirectToVote>1,556,040 </solePowerOrDirectToVote>
          <sharedPowerOrDirectToVote>0</sharedPowerOrDirectToVote>
          <solePowerOrDirectToDispose>1,556,040 </solePowerOrDirectToDispose>
          <sharedPowerOrDirectToDispose>0</sharedPowerOrDirectToDispose>
        </numberOfSharesPersonHas>
      </item4>
      <item5>
        <notApplicableFlag>Y</notApplicableFlag>
      </item5>
      <item6>
        <notApplicableFlag>Y</notApplicableFlag>
      </item6>
      <item7>
        <notApplicableFlag>Y</notApplicableFlag>
      </item7>
      <item8>
        <notApplicableFlag>Y</notApplicableFlag>
      </item8>
      <item9>
        <notApplicableFlag>Y</notApplicableFlag>
      </item9>
      <item10>
        <notApplicableFlag>N</notApplicableFlag>
        <certifications>By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under &amp;#167; 240.14a-11.

</certifications>
      </item10>
    </items>
    <signatureInformation>
      <reportingPersonName>DISCIPLINED GROWTH INVESTORS INC /MN</reportingPersonName>
      <signatureDetails>
        <signature>Peter Rieke</signature>
        <title>Chief Compliance Officer</title>
        <date>11/14/2024</date>
      </signatureDetails>
    </signatureInformation>
  </formData>
</edgarSubmission>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
