<?xml version="1.0" encoding="UTF-8"?><edgarSubmission xmlns="http://www.sec.gov/edgar/schedule13g" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <headerData>
    <submissionType>SCHEDULE 13G</submissionType>
    <filerInfo>
      <filer>
        <filerCredentials>
          <cik>0001349339</cik>
          <ccc>XXXXXXXX</ccc>
        </filerCredentials>
      </filer>
      <liveTestFlag>LIVE</liveTestFlag>



    </filerInfo>
  </headerData>
  <formData>
    <coverPageHeader>
      <securitiesClassTitle>Class A ordinary shares, par value $0.0001 per share</securitiesClassTitle>
      <eventDateRequiresFilingThisStatement>03/26/2025</eventDateRequiresFilingThisStatement>
      <issuerInfo>
        <issuerCik>0002019804</issuerCik>
        <issuerName>HCM II Acquisition Corp.</issuerName>
        <issuerCusip>G43658106</issuerCusip>
        <issuerPrincipalExecutiveOfficeAddress>
          <street1 xmlns="http://www.sec.gov/edgar/common">100 First Stamford Place, Suite 330</street1>
          <city xmlns="http://www.sec.gov/edgar/common">Stamford</city>
          <stateOrCountry xmlns="http://www.sec.gov/edgar/common">CT</stateOrCountry>
          <zipCode xmlns="http://www.sec.gov/edgar/common">06902</zipCode>
        </issuerPrincipalExecutiveOfficeAddress>
      </issuerInfo>
      <designateRulesPursuantThisScheduleFiled>
        <designateRulePursuantThisScheduleFiled>Rule 13d-1(c)</designateRulePursuantThisScheduleFiled>
      </designateRulesPursuantThisScheduleFiled>
    </coverPageHeader>
    <coverPageHeaderReportingPersonDetails>


      <reportingPersonName>Linden Capital L.P.</reportingPersonName>
      <memberGroup>a</memberGroup>
      <citizenshipOrOrganization>D0</citizenshipOrOrganization>
      <reportingPersonBeneficiallyOwnedNumberOfShares>
        <soleVotingPower>0</soleVotingPower>
        <sharedVotingPower>1901984</sharedVotingPower>
        <soleDispositivePower>0</soleDispositivePower>
        <sharedDispositivePower>1901984</sharedDispositivePower>
      </reportingPersonBeneficiallyOwnedNumberOfShares>
      <reportingPersonBeneficiallyOwnedAggregateNumberOfShares>1901984</reportingPersonBeneficiallyOwnedAggregateNumberOfShares>
      <aggregateAmountExcludesCertainSharesFlag>N</aggregateAmountExcludesCertainSharesFlag>
      <classPercent>8.3</classPercent>
      <typeOfReportingPerson>PN</typeOfReportingPerson>
    </coverPageHeaderReportingPersonDetails>
    <coverPageHeaderReportingPersonDetails>

      <reportingPersonName>Linden GP LLC</reportingPersonName>
      <memberGroup>a</memberGroup>
      <citizenshipOrOrganization>DE</citizenshipOrOrganization>
      <reportingPersonBeneficiallyOwnedNumberOfShares>
        <soleVotingPower>0</soleVotingPower>
        <sharedVotingPower>1901984</sharedVotingPower>
        <soleDispositivePower>0</soleDispositivePower>
        <sharedDispositivePower>1901984</sharedDispositivePower>
      </reportingPersonBeneficiallyOwnedNumberOfShares>
      <reportingPersonBeneficiallyOwnedAggregateNumberOfShares>1901984</reportingPersonBeneficiallyOwnedAggregateNumberOfShares>
      <aggregateAmountExcludesCertainSharesFlag>N</aggregateAmountExcludesCertainSharesFlag>
      <classPercent>8.3</classPercent>
      <typeOfReportingPerson>HC</typeOfReportingPerson>
    </coverPageHeaderReportingPersonDetails>
    <coverPageHeaderReportingPersonDetails>


      <reportingPersonName>Linden Advisors LP</reportingPersonName>
      <memberGroup>a</memberGroup>
      <citizenshipOrOrganization>DE</citizenshipOrOrganization>
      <reportingPersonBeneficiallyOwnedNumberOfShares>
        <soleVotingPower>0</soleVotingPower>
        <sharedVotingPower>2000000</sharedVotingPower>
        <soleDispositivePower>0</soleDispositivePower>
        <sharedDispositivePower>2000000</sharedDispositivePower>
      </reportingPersonBeneficiallyOwnedNumberOfShares>
      <reportingPersonBeneficiallyOwnedAggregateNumberOfShares>2000000</reportingPersonBeneficiallyOwnedAggregateNumberOfShares>
      <aggregateAmountExcludesCertainSharesFlag>N</aggregateAmountExcludesCertainSharesFlag>
      <classPercent>8.7</classPercent>
      <typeOfReportingPerson>IA</typeOfReportingPerson>
      <typeOfReportingPerson>PN</typeOfReportingPerson>
    </coverPageHeaderReportingPersonDetails>
    <coverPageHeaderReportingPersonDetails>

      <reportingPersonName>Siu Min Wong</reportingPersonName>
      <memberGroup>a</memberGroup>
      <citizenshipOrOrganization>X1</citizenshipOrOrganization>
      <reportingPersonBeneficiallyOwnedNumberOfShares>
        <soleVotingPower>0</soleVotingPower>
        <sharedVotingPower>2000000</sharedVotingPower>
        <soleDispositivePower>0</soleDispositivePower>
        <sharedDispositivePower>2000000</sharedDispositivePower>
      </reportingPersonBeneficiallyOwnedNumberOfShares>
      <reportingPersonBeneficiallyOwnedAggregateNumberOfShares>2000000</reportingPersonBeneficiallyOwnedAggregateNumberOfShares>
      <aggregateAmountExcludesCertainSharesFlag>N</aggregateAmountExcludesCertainSharesFlag>
      <classPercent>8.7</classPercent>
      <typeOfReportingPerson>IN</typeOfReportingPerson>
      <typeOfReportingPerson>HC</typeOfReportingPerson>
    </coverPageHeaderReportingPersonDetails>
    <items>
      <item1>
        <issuerName>HCM II Acquisition Corp.</issuerName>
        <issuerPrincipalExecutiveOfficeAddress>100 First Stamford Place, Suite 330, Stamford, Connecticut 06902.</issuerPrincipalExecutiveOfficeAddress>
      </item1>
      <item2>
        <filingPersonName>This Statement is filed on behalf of each of the following persons (collectively, the "Reporting Persons")

i)     Linden Capital L.P., a Bermuda limited partnership ("Linden Capital");
ii)    Linden GP LLC, a Delaware limited liability company ("Linden GP");
iii)   Linden Advisors LP, a Delaware limited partnership ("Linden Advisors"); and
iv)   Siu Min (Joe) Wong ("Mr. Wong").

This Statement relates to Shares (as defined herein) held for the account of Linden Capital and one or more separately managed accounts (the "Managed Accounts").  Linden GP is the general partner of Linden Capital and, in such capacity, may be deemed to beneficially own the Shares held by Linden Capital.  Linden Advisors is the investment manager of Linden Capital and trading advisor or investment advisor for the Managed Accounts.  Mr. Wong is the principal owner and controlling person of Linden Advisors and Linden GP.  In such capacities, Linden Advisors and Mr. Wong may each be deemed to beneficially own the Shares held by each of Linden Capital and the Managed Accounts.</filingPersonName>
        <principalBusinessOfficeOrResidenceAddress>The principal business address for Linden Capital is Victoria Place, 31 Victoria Street, Hamilton HM10, Bermuda.  The principal business address for each of Linden Advisors, Linden GP and Mr. Wong is 590 Madison Avenue, 32nd Floor, New York, New York 10022.</principalBusinessOfficeOrResidenceAddress>
        <citizenship>i)	Linden Capital is a Bermuda limited partnership.
ii)	Linden GP is a Delaware limited liability company.
iii)	Linden Advisors is a Delaware limited partnership.
iv)	Mr. Wong is a citizen of China (Hong Kong) and the United States.</citizenship>
      </item2>
      <item3>
        <notApplicableFlag>Y</notApplicableFlag>
      </item3>
      <item4>
        <amountBeneficiallyOwned>As of March 28, 2025, each of Linden Advisors and Mr. Wong may be deemed the beneficial owner of 2,000,000 Shares.  This amount consists of 1,901,984 Shares held by Linden Capital and 98,016 Shares held by separately managed accounts.  As of March 28, 2025 each of Linden GP and Linden Capital may be deemed the beneficial owner of the 1,901,984 Shares held by Linden Capital.</amountBeneficiallyOwned>
        <classPercent>As of March 28, 2025, each of Linden Advisors and Mr. Wong may be deemed the beneficial owner of approximately 8.7% of Shares outstanding, and each of Linden GP and Linden Capital may be deemed the beneficial owner of approximately 8.3% of Shares outstanding.  These percentages are based on 23,000,000 Shares outstanding based on disclosures by the issuer in its quarterly report on Form 10-Q filed on November 13, 2024.</classPercent>
        <numberOfSharesPersonHas>
          <solePowerOrDirectToVote>Linden Capital and Linden GP: 0
Linden Advisors and Mr. Wong: 0</solePowerOrDirectToVote>
          <sharedPowerOrDirectToVote>Linden Capital and Linden GP: 1,901,984
Linden Advisors and Mr. Wong: 2,000,000</sharedPowerOrDirectToVote>
          <solePowerOrDirectToDispose>Linden Capital and Linden GP: 0
Linden Advisors and Mr. Wong: 0</solePowerOrDirectToDispose>
          <sharedPowerOrDirectToDispose>Linden Capital and Linden GP: 1,901,984
Linden Advisors and Mr. Wong: 2,000,000</sharedPowerOrDirectToDispose>
        </numberOfSharesPersonHas>
      </item4>
      <item5>
        <notApplicableFlag>Y</notApplicableFlag>
      </item5>
      <item6>
        <notApplicableFlag>N</notApplicableFlag>
        <ownershipMoreThan5PercentOnBehalfOfAnotherPerson>See disclosure in Items 2 and 4 hereof.</ownershipMoreThan5PercentOnBehalfOfAnotherPerson>
      </item6>
      <item7>
        <notApplicableFlag>N</notApplicableFlag>
        <subsidiaryIdentificationAndClassification>See disclosure in Item 2 hereof.</subsidiaryIdentificationAndClassification>
      </item7>
      <item8>
        <notApplicableFlag>N</notApplicableFlag>
        <identificationAndClassificationOfGroupMembers>See Exhibit A attached hereto.</identificationAndClassificationOfGroupMembers>
      </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>Linden Capital L.P.</reportingPersonName>
      <signatureDetails>
        <signature>/S/ Saul Ahn</signature>
        <title>Saul Ahn, Authorized Signatory</title>
        <date>03/31/2025</date>
      </signatureDetails>
    </signatureInformation>
    <signatureInformation>
      <reportingPersonName>Linden GP LLC</reportingPersonName>
      <signatureDetails>
        <signature>/S/ Saul Ahn</signature>
        <title>Saul Ahn, Authorized Signatory</title>
        <date>03/31/2025</date>
      </signatureDetails>
    </signatureInformation>
    <signatureInformation>
      <reportingPersonName>Linden Advisors LP</reportingPersonName>
      <signatureDetails>
        <signature>/S/ Saul Ahn</signature>
        <title>Saul Ahn, General Counsel</title>
        <date>03/31/2025</date>
      </signatureDetails>
    </signatureInformation>
    <signatureInformation>
      <reportingPersonName>Siu Min Wong</reportingPersonName>
      <signatureDetails>
        <signature>/S/ Saul Ahn</signature>
        <title>Saul Ahn, Attorney-in-Fact for Siu Min Wong**</title>
        <date>03/31/2025</date>
      </signatureDetails>
    </signatureInformation>
    <signatureComments>**Duly authorized under Siu Min Wong's Power of Attorney, dated June 10, 2019, incorporated herein by reference to Exhibit B of the statement on Schedule 13G filed by Linden Capital L.P. on June 19, 2019 in respect of its holdings in Haymaker Acquisition Corp II.


EXHIBIT A


JOINT FILING AGREEMENT

	The undersigned hereby agree that the statement on Schedule 13G with respect to the Shares of HCM II Acquisition Corp. dated as of March 31, 2025 is, and any further amendments thereto signed by each of the undersigned shall be, filed on behalf of each of us pursuant to and in accordance with the provisions of Rule 13d-1(k) under the Securities Exchange Act of 1934, as amended.


Dated:  March 31, 2025


LINDEN CAPITAL L.P.
	By: Linden GP LLC, its general partner
		By: /S/ Saul Ahn______
		    Saul Ahn,
		    Authorized Signatory



LINDEN GP LLC
By: /S/ Saul Ahn      ______
 	    Saul Ahn,
		    Authorized Signatory



LINDEN ADVISORS LP
By: /S/ Saul Ahn______
		    Saul Ahn,
		    General Counsel



	SIU MIN WONG

	By:  /S/ Saul Ahn________________
		Saul Ahn, Attorney-in-Fact for Siu Min Wong**

___________

**Duly authorized under Siu Min Wong's Power of Attorney, dated June 10, 2019, incorporated herein by reference to Exhibit B of the statement on Schedule 13G filed by Linden Capital L.P. on June 19, 2019 in respect of its holdings in Haymaker Acquisition Corp II.</signatureComments>
  </formData>
</edgarSubmission>
