<SEC-DOCUMENT>0001104659-25-012990.txt : 20250213
<SEC-HEADER>0001104659-25-012990.hdr.sgml : 20250213
<ACCEPTANCE-DATETIME>20250213164419
ACCESSION NUMBER:		0001104659-25-012990
CONFORMED SUBMISSION TYPE:	SCHEDULE 13G/A
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20250213
DATE AS OF CHANGE:		20250213

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Orion Group Holdings Inc
		CENTRAL INDEX KEY:			0001402829
		STANDARD INDUSTRIAL CLASSIFICATION:	HEAVY CONSTRUCTION OTHER THAN BUILDING CONST - CONTRACTORS [1600]
		ORGANIZATION NAME:           	05 Real Estate & Construction
		IRS NUMBER:				260097459
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SCHEDULE 13G/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-83674
		FILM NUMBER:		25621063

	BUSINESS ADDRESS:	
		STREET 1:		12000 AEROSPACE SUITE 300
		CITY:			Houston
		STATE:			TX
		ZIP:			77034
		BUSINESS PHONE:		713-852-6500

	MAIL ADDRESS:	
		STREET 1:		12000 AEROSPACE SUITE 300
		CITY:			Houston
		STATE:			TX
		ZIP:			77034

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Orion Marine Group Inc
		DATE OF NAME CHANGE:	20070612

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Portolan Capital Management, LLC
		CENTRAL INDEX KEY:			0001350290
		ORGANIZATION NAME:           	
		IRS NUMBER:				201926326
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SCHEDULE 13G/A

	BUSINESS ADDRESS:	
		STREET 1:		2 INTERNATIONAL PLACE, 26TH FLOOR
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02110
		BUSINESS PHONE:		617.753.6400

	MAIL ADDRESS:	
		STREET 1:		2 INTERNATIONAL PLACE, 26TH FLOOR
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02110
</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>0001104659-24-081461</previousAccessionNumber>
    <filerInfo>
      <filer>
        <filerCredentials>
          <!-- Field: Pseudo-Tag; ID: Name; Data: Portolan Capital Management, LLC -->
          <cik>0001350290</cik>
          <ccc>XXXXXXXX</ccc>
        </filerCredentials>
      </filer>
      <liveTestFlag>LIVE</liveTestFlag>



    </filerInfo>
  </headerData>
  <formData>
    <coverPageHeader>
      <amendmentNo>1</amendmentNo>
      <securitiesClassTitle>Common Stock, $0.01 par value per share</securitiesClassTitle>
      <eventDateRequiresFilingThisStatement>12/31/2024</eventDateRequiresFilingThisStatement>
      <issuerInfo>
        <issuerCik>0001402829</issuerCik>
        <issuerName>Orion Group Holdings, Inc.</issuerName>
        <issuerCusip>68628V308</issuerCusip>
        <issuerPrincipalExecutiveOfficeAddress>
          <com:street1>12000 Aerospace Suite 300</com:street1>
          <com:city>Houston</com:city>
          <com:stateOrCountry>TX</com:stateOrCountry>
          <com:zipCode>77034</com:zipCode>
        </issuerPrincipalExecutiveOfficeAddress>
      </issuerInfo>
      <designateRulesPursuantThisScheduleFiled>
        <designateRulePursuantThisScheduleFiled>Rule 13d-1(c)</designateRulePursuantThisScheduleFiled>
      </designateRulesPursuantThisScheduleFiled>
    </coverPageHeader>
    <coverPageHeaderReportingPersonDetails>


      <reportingPersonName>Portolan Capital Management, LLC</reportingPersonName>
      <citizenshipOrOrganization>DE</citizenshipOrOrganization>
      <reportingPersonBeneficiallyOwnedNumberOfShares>
        <soleVotingPower>448691.00</soleVotingPower>
        <sharedVotingPower>0.00</sharedVotingPower>
        <soleDispositivePower>448691.00</soleDispositivePower>
        <sharedDispositivePower>0.00</sharedDispositivePower>
      </reportingPersonBeneficiallyOwnedNumberOfShares>
      <reportingPersonBeneficiallyOwnedAggregateNumberOfShares>448691.00</reportingPersonBeneficiallyOwnedAggregateNumberOfShares>
      <aggregateAmountExcludesCertainSharesFlag>N</aggregateAmountExcludesCertainSharesFlag>
      <classPercent>1.15</classPercent>
      <typeOfReportingPerson>IA</typeOfReportingPerson>
    </coverPageHeaderReportingPersonDetails>
    <coverPageHeaderReportingPersonDetails>

      <reportingPersonName>George McCabe</reportingPersonName>
      <citizenshipOrOrganization>X1</citizenshipOrOrganization>
      <reportingPersonBeneficiallyOwnedNumberOfShares>
        <soleVotingPower>448691.00</soleVotingPower>
        <sharedVotingPower>0.00</sharedVotingPower>
        <soleDispositivePower>448691.00</soleDispositivePower>
        <sharedDispositivePower>0.00</sharedDispositivePower>
      </reportingPersonBeneficiallyOwnedNumberOfShares>
      <reportingPersonBeneficiallyOwnedAggregateNumberOfShares>448691.00</reportingPersonBeneficiallyOwnedAggregateNumberOfShares>
      <aggregateAmountExcludesCertainSharesFlag>N</aggregateAmountExcludesCertainSharesFlag>
      <classPercent>1.15</classPercent>
      <typeOfReportingPerson>IN</typeOfReportingPerson>
    </coverPageHeaderReportingPersonDetails>
    <items>
      <item1>
        <issuerName>Orion Group Holdings, Inc.</issuerName>
        <issuerPrincipalExecutiveOfficeAddress>12000 Aerospace Avenue Suite 300 Houston, TX, 77034</issuerPrincipalExecutiveOfficeAddress>
      </item1>
      <item2>
        <filingPersonName>This statement is being filed with respect to the shares Common Stock of the Issuer beneficially owned (1) directly by Portolan Capital Management, LLC, a registered investment adviser, in its capacity as investment manager for various clients, and (2) indirectly by George McCabe, the Manager of Portolan Capital Management, LLC. Portolan Capital Management, LLC and Mr. McCabe are sometimes individually referred to herein as a "Reporting Person" and collectively as the "Reporting Persons."</filingPersonName>
        <principalBusinessOfficeOrResidenceAddress>The address of the principal business office of each of the Reporting Persons is 2 International Place, FL 26, Boston, MA 02110</principalBusinessOfficeOrResidenceAddress>
        <citizenship>Portolan Capital Management, LLC - DE

Mr. McCabe - USA</citizenship>
      </item2>
      <item3>
        <notApplicableFlag>Y</notApplicableFlag>
      </item3>
      <item4>
        <amountBeneficiallyOwned>The information required by Item 4(a) is set forth in Row 9 of the cover page for each of the Reporting Persons and is incorporated by reference herein.</amountBeneficiallyOwned>
        <classPercent>The information required by Item 4(b) is set forth in Row 11 of the cover page for each of the Reporting Persons and is incorporated by reference herein.</classPercent>
        <numberOfSharesPersonHas>
          <solePowerOrDirectToVote>The information required by Item 4(c) is set forth in Row 5 of the cover page for each of the Reporting Persons and is incorporated by reference herein.</solePowerOrDirectToVote>
          <sharedPowerOrDirectToVote>0</sharedPowerOrDirectToVote>
          <solePowerOrDirectToDispose>The information required by Item 4(c) is set forth in Row 7 of the cover page for each of the Reporting Persons and is incorporated by reference herein.</solePowerOrDirectToDispose>
          <sharedPowerOrDirectToDispose>0</sharedPowerOrDirectToDispose>
        </numberOfSharesPersonHas>
      </item4>
      <item5>
        <notApplicableFlag>N</notApplicableFlag>
        <classOwnership5PercentOrLess>Y</classOwnership5PercentOrLess>
      </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 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 ?? 240.14a-11.</certifications>
      </item10>
    </items>
    <signatureInformation>
      <reportingPersonName>Portolan Capital Management, LLC</reportingPersonName>
      <signatureDetails>
        <signature>George McCabe</signature>
        <title>George McCabe/Manager</title>
        <date>02/13/2025</date>
      </signatureDetails>
    </signatureInformation>
    <signatureInformation>
      <reportingPersonName>George McCabe</reportingPersonName>
      <signatureDetails>
        <signature>George McCabe</signature>
        <title>George McCabe</title>
        <date>02/13/2025</date>
      </signatureDetails>
    </signatureInformation>
  </formData>
</edgarSubmission>
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</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
