<SEC-DOCUMENT>0001213900-25-086321.txt : 20250909
<SEC-HEADER>0001213900-25-086321.hdr.sgml : 20250909
<ACCEPTANCE-DATETIME>20250909211326
ACCESSION NUMBER:		0001213900-25-086321
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20250909
FILED AS OF DATE:		20250909
DATE AS OF CHANGE:		20250909

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Smith, Jr. Thomas S.
		CENTRAL INDEX KEY:			0001601765
		ORGANIZATION NAME:           	

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-42833
		FILM NUMBER:		251304493

	MAIL ADDRESS:	
		STREET 1:		2 PENN PLAZA
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10121

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Trailblazer Acquisition Corp.
		CENTRAL INDEX KEY:			0002075310
		STANDARD INDUSTRIAL CLASSIFICATION:	BLANK CHECKS [6770]
		ORGANIZATION NAME:           	05 Real Estate & Construction
		EIN:				000000000
		STATE OF INCORPORATION:			E9
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		152 WEST 57TH STREET, 27TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10019
		BUSINESS PHONE:		212-621-8777

	MAIL ADDRESS:	
		STREET 1:		152 WEST 57TH STREET, 27TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10019
</SEC-HEADER>
<DOCUMENT>
<TYPE>3
<SEQUENCE>1
<FILENAME>ownership.xml
<DESCRIPTION>OWNERSHIP DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0206</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2025-09-09</periodOfReport>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0002075310</issuerCik>
        <issuerName>Trailblazer Acquisition Corp.</issuerName>
        <issuerTradingSymbol>BLZR</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001601765</rptOwnerCik>
            <rptOwnerName>Smith, Jr. Thomas S.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O TRAILBLAZER ACQUISITION</rptOwnerStreet1>
            <rptOwnerStreet2>152 WEST 57TH STREET, 27TH FLOOR</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10121</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <derivativeTable>
        <derivativeHolding>
            <securityTitle>
                <value>Class B Ordinary Shares</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F1"/>
            </conversionOrExercisePrice>
            <exerciseDate>
                <footnoteId id="F1"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F1"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Class A Ordinary Shares</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>25000</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeHolding>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">As described in the Issuer's Registration Statement on Form S-1, as amended (File No. 333-288651), under the heading &quot;Description of Securities - Founder Shares,&quot; Class B ordinary shares will automatically convert into Class A ordinary shares of the Issuer in connection with the consummation of the Issuer's initial business combination or earlier at the option of the Reporting Person on a one-for-one basis, subject to adjustment for share subdivisions, share capitalizations, reorganizations, recapitalizations and the like, and subject to further adjustment as provided therein</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Thomas S. Smith</signatureName>
        <signatureDate>2025-09-09</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
