<SEC-DOCUMENT>0000905148-25-002992.txt : 20250814
<SEC-HEADER>0000905148-25-002992.hdr.sgml : 20250814
<ACCEPTANCE-DATETIME>20250814173126
ACCESSION NUMBER:		0000905148-25-002992
CONFORMED SUBMISSION TYPE:	SCHEDULE 13G
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20250814
DATE AS OF CHANGE:		20250814

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			COGENT COMMUNICATIONS HOLDINGS, INC.
		CENTRAL INDEX KEY:			0001158324
		STANDARD INDUSTRIAL CLASSIFICATION:	COMMUNICATION SERVICES, NEC [4899]
		ORGANIZATION NAME:           	06 Technology
		EIN:				522337274
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SCHEDULE 13G
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-78106
		FILM NUMBER:		251221285

	BUSINESS ADDRESS:	
		STREET 1:		2450 N STREET, NW
		CITY:			WASHINGTON
		STATE:			DC
		ZIP:			20037
		BUSINESS PHONE:		2022954200

	MAIL ADDRESS:	
		STREET 1:		2450 N STREET, NW
		CITY:			WASHINGTON
		STATE:			DC
		ZIP:			20037

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	COGENT COMMUNICATIONS GROUP INC
		DATE OF NAME CHANGE:	20010828

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Turtle Creek Asset Management Inc.
		CENTRAL INDEX KEY:			0001484148
		ORGANIZATION NAME:           	
		EIN:				000000000
		STATE OF INCORPORATION:			Z4
		FISCAL YEAR END:			1109

	FILING VALUES:
		FORM TYPE:		SCHEDULE 13G

	BUSINESS ADDRESS:	
		STREET 1:		SCOTIA PLAZA
		STREET 2:		40 KING STREET WEST, SUITE 5100
		CITY:			TORONTO
		STATE:			A6
		ZIP:			M5H 3Y2
		BUSINESS PHONE:		(416) 363-7400

	MAIL ADDRESS:	
		STREET 1:		SCOTIA PLAZA
		STREET 2:		40 KING STREET WEST, SUITE 5100
		CITY:			TORONTO
		STATE:			A6
		ZIP:			M5H 3Y2
</SEC-HEADER>
<DOCUMENT>
<TYPE>SCHEDULE 13G
<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</submissionType>
<filerInfo>
<filer>
<filerCredentials>
<cik>0001484148</cik>
<ccc>XXXXXXXX</ccc>
</filerCredentials>
</filer>
<liveTestFlag>LIVE</liveTestFlag>



</filerInfo>
</headerData>
<formData>
<coverPageHeader>
<securitiesClassTitle>Common Stock</securitiesClassTitle>
<eventDateRequiresFilingThisStatement>06/30/2025</eventDateRequiresFilingThisStatement>
<issuerInfo>
<issuerCik>0001158324</issuerCik>
<issuerName>COGENT COMMUNICATIONS HOLDINGS, INC.</issuerName>
<issuerCusip>19239V302</issuerCusip>
<issuerPrincipalExecutiveOfficeAddress>
<com:street1>2450 N Street N.W.</com:street1>
<com:city>Washington</com:city>
<com:stateOrCountry>DC</com:stateOrCountry>
<com:zipCode>20037</com:zipCode>
</issuerPrincipalExecutiveOfficeAddress>
</issuerInfo>
<designateRulesPursuantThisScheduleFiled>
<designateRulePursuantThisScheduleFiled>Rule 13d-1(b)</designateRulePursuantThisScheduleFiled>
</designateRulesPursuantThisScheduleFiled>
</coverPageHeader>
<coverPageHeaderReportingPersonDetails>

<reportingPersonName>Turtle Creek Asset Management Inc.</reportingPersonName>
<citizenshipOrOrganization>Z4</citizenshipOrOrganization>
<reportingPersonBeneficiallyOwnedNumberOfShares>
<soleVotingPower>2792711</soleVotingPower>
<sharedVotingPower>0</sharedVotingPower>
<soleDispositivePower>2792711</soleDispositivePower>
<sharedDispositivePower>0</sharedDispositivePower>
</reportingPersonBeneficiallyOwnedNumberOfShares>
<reportingPersonBeneficiallyOwnedAggregateNumberOfShares>2792711</reportingPersonBeneficiallyOwnedAggregateNumberOfShares>
<aggregateAmountExcludesCertainSharesFlag>N</aggregateAmountExcludesCertainSharesFlag>
<classPercent>5.7</classPercent>
<typeOfReportingPerson>FI</typeOfReportingPerson>
</coverPageHeaderReportingPersonDetails>
<items>
<item1>
<issuerName>COGENT COMMUNICATIONS HOLDINGS, INC.</issuerName>
<issuerPrincipalExecutiveOfficeAddress>2450 N Street N.W., Washington, District of Columbia, 20037</issuerPrincipalExecutiveOfficeAddress>
</item1>
<item2>
<filingPersonName>This statement on Schedule 13G is being filed by Turtle Creek Asset Management Inc. ("Turtle Creek").</filingPersonName>
<principalBusinessOfficeOrResidenceAddress>Scotia Plaza, 40 King Street West, Suite 5100, Toronto, Ontario M5H 3Y2 Canada</principalBusinessOfficeOrResidenceAddress>
<citizenship>Canada</citizenship>
</item2>
<item3>
<notApplicableFlag>N</notApplicableFlag>
<typeOfPersonFiling>FI</typeOfPersonFiling>
<otherTypeOfPersonFiling>Investment advisor</otherTypeOfPersonFiling>
</item3>
<item4>
<amountBeneficiallyOwned>See the response(s) to Item 9 on the attached cover page.</amountBeneficiallyOwned>
<classPercent>See the response(s) to Item 11 on the attached cover page.</classPercent>
<numberOfSharesPersonHas>
<solePowerOrDirectToVote>See the response(s) to Item 5 on the attached cover page.</solePowerOrDirectToVote>
<sharedPowerOrDirectToVote>See the response(s) to Item 6 on the attached cover page.</sharedPowerOrDirectToVote>
<solePowerOrDirectToDispose>See the response(s) to Item 7 on the attached cover page.</solePowerOrDirectToDispose>
<sharedPowerOrDirectToDispose>See the response(s) to Item 8 on the attached cover page.</sharedPowerOrDirectToDispose>
</numberOfSharesPersonHas>
</item4>
<item5>
<notApplicableFlag>Y</notApplicableFlag>
</item5>
<item6>
<notApplicableFlag>N</notApplicableFlag>
<ownershipMoreThan5PercentOnBehalfOfAnotherPerson>Turtle Creek holds the shares of Common Stock reported herein for the benefit of unit holders of mutual funds managed by Turtle Creek, none of whom is known to Turtle Creek to have an interest of more than 5 percent of the class.</ownershipMoreThan5PercentOnBehalfOfAnotherPerson>
</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 ?? 240.14a-11.&#13;
&#13;
By signing below I certify that, to the best of my knowledge and belief, the foreign regulatory scheme applicable to investment fund managers and portfolio managers registered with the Ontario Securities Commission is substantially comparable to the regulatory scheme applicable to the functionally equivalent U.S. institution(s). I also undertake to furnish to the Commission staff, upon request, information that would otherwise be disclosed in a Schedule 13D.</certifications>
</item10>
</items>
<signatureInformation>
<reportingPersonName>Turtle Creek Asset Management Inc.</reportingPersonName>
<signatureDetails>
<signature>/s/ Meaghan Einav</signature>
<title>Meaghan Einav, Chief Compliance Officer</title>
<date>08/14/2025</date>
</signatureDetails>
</signatureInformation>
</formData>
</edgarSubmission>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
