<SEC-DOCUMENT>0001968582-25-000420.txt : 20250529
<SEC-HEADER>0001968582-25-000420.hdr.sgml : 20250529
<ACCEPTANCE-DATETIME>20250529171923
ACCESSION NUMBER:		0001968582-25-000420
CONFORMED SUBMISSION TYPE:	144
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20250529
DATE AS OF CHANGE:		20250529

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:		144
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	000-51829
		FILM NUMBER:		251004786

	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

REPORTING-OWNER:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			SCHAEFFER DAVE
		CENTRAL INDEX KEY:			0001166976
		ORGANIZATION NAME:           	

	FILING VALUES:
		FORM TYPE:		144

	MAIL ADDRESS:	
		STREET 1:		C/O COGENT COMMUNICATIONS HOLDINGS, INC.
		STREET 2:		2450 N ST NW, 4TH FLOOR
		CITY:			WASHINGTON
		STATE:			DC
		ZIP:			20037
</SEC-HEADER>
<DOCUMENT>
<TYPE>144
<SEQUENCE>1
<FILENAME>primary_doc.xml
<TEXT>
<XML>
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    <submissionType>144</submissionType>
    <filerInfo>
      <filer>
        <filerCredentials>
          <cik>0001166976</cik>
          <ccc>XXXXXXXX</ccc>
        </filerCredentials>
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      <liveTestFlag>LIVE</liveTestFlag>



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    <issuerInfo>
      <issuerCik>0001158324</issuerCik>
      <issuerName>Cogent Communications Holdings, Inc.</issuerName>
      <secFileNumber>000-51829</secFileNumber>
      <issuerAddress>
        <com:street1>2450 N.  Street  N.W.</com:street1>
        <com:city>Washington</com:city>
        <com:stateOrCountry>DC</com:stateOrCountry>
        <com:zipCode>20037</com:zipCode>
      </issuerAddress>
      <issuerContactPhone>202-295-4200</issuerContactPhone>
      <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>David Schaeffer</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
      <relationshipsToIssuer>
        <relationshipToIssuer>Founder</relationshipToIssuer>
        <relationshipToIssuer>CEO</relationshipToIssuer>
      </relationshipsToIssuer>
    </issuerInfo>
    <securitiesInformation>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <brokerOrMarketmakerDetails>
        <name>J.P. Morgan Securities LLC</name>
        <address>
          <com:street1>390 Madison Avenue, 6th Floor</com:street1>
          <com:city>New York</com:city>
          <com:stateOrCountry>NY</com:stateOrCountry>
          <com:zipCode>10017</com:zipCode>
        </address>
      </brokerOrMarketmakerDetails>
      <noOfUnitsSold>25000</noOfUnitsSold>
      <aggregateMarketValue>1169000</aggregateMarketValue>
      <noOfUnitsOutstanding>49337310</noOfUnitsOutstanding>
      <approxSaleDate>05/29/2025</approxSaleDate>
      <securitiesExchangeName>NASDAQ</securitiesExchangeName>
    </securitiesInformation>
    <securitiesToBeSold>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <acquiredDate>04/30/2009</acquiredDate>
      <natureOfAcquisitionTransaction>Vested restricted stock grant</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>25000</amountOfSecuritiesAcquired>
      <paymentDate>04/30/2009</paymentDate>
      <natureOfPayment>Compensation</natureOfPayment>
    </securitiesToBeSold>
    <nothingToReportFlagOnSecuritiesSoldInPast3Months>N</nothingToReportFlagOnSecuritiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>David Schaeffer</name>
        <address>
          <com:street1>C/o Cogent Communications Holdings Inc</com:street1>
          <com:street2>2450 N. Street N.W.</com:street2>
          <com:city>Washington</com:city>
          <com:stateOrCountry>DC</com:stateOrCountry>
          <com:zipCode>20037</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <saleDate>03/04/2025</saleDate>
      <amountOfSecuritiesSold>60000</amountOfSecuritiesSold>
      <grossProceeds>4302858</grossProceeds>
    </securitiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>David Schaeffer</name>
        <address>
          <com:street1>C/o Cogent Communications Holdings Inc</com:street1>
          <com:street2>2450 N. Street N.W.</com:street2>
          <com:city>Washington</com:city>
          <com:stateOrCountry>DC</com:stateOrCountry>
          <com:zipCode>20037</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <saleDate>03/14/2025</saleDate>
      <amountOfSecuritiesSold>52500</amountOfSecuritiesSold>
      <grossProceeds>3585299</grossProceeds>
    </securitiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>David Schaeffer</name>
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          <com:street1>C/o Cogent Communications Holdings Inc</com:street1>
          <com:street2>2450 N. Street N.W.</com:street2>
          <com:city>Washington</com:city>
          <com:stateOrCountry>DC</com:stateOrCountry>
          <com:zipCode>20037</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <saleDate>05/12/2025</saleDate>
      <amountOfSecuritiesSold>11372</amountOfSecuritiesSold>
      <grossProceeds>569206</grossProceeds>
    </securitiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>David Schaeffer</name>
        <address>
          <com:street1>C/o Cogent Communications Holdings Inc</com:street1>
          <com:street2>2450 N. Street N.W.</com:street2>
          <com:city>Washington</com:city>
          <com:stateOrCountry>DC</com:stateOrCountry>
          <com:zipCode>20037</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <saleDate>05/13/2025</saleDate>
      <amountOfSecuritiesSold>42628</amountOfSecuritiesSold>
      <grossProceeds>2147884</grossProceeds>
    </securitiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>David Schaeffer</name>
        <address>
          <com:street1>C/o Cogent Communications Holdings Inc</com:street1>
          <com:street2>2450 N. Street N.W.</com:street2>
          <com:city>Washington</com:city>
          <com:stateOrCountry>DC</com:stateOrCountry>
          <com:zipCode>20037</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <saleDate>05/14/2025</saleDate>
      <amountOfSecuritiesSold>30000</amountOfSecuritiesSold>
      <grossProceeds>1519146</grossProceeds>
    </securitiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>David Schaeffer</name>
        <address>
          <com:street1>C/o Cogent Communications Holdings Inc</com:street1>
          <com:street2>2450 N. Street N.W.</com:street2>
          <com:city>Washington</com:city>
          <com:stateOrCountry>DC</com:stateOrCountry>
          <com:zipCode>20037</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <saleDate>05/15/2025</saleDate>
      <amountOfSecuritiesSold>40000</amountOfSecuritiesSold>
      <grossProceeds>2013036</grossProceeds>
    </securitiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>David Schaeffer</name>
        <address>
          <com:street1>C/o Cogent Communications Holdings Inc</com:street1>
          <com:street2>2450 N. Street N.W.</com:street2>
          <com:city>Washington</com:city>
          <com:stateOrCountry>DC</com:stateOrCountry>
          <com:zipCode>20037</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <saleDate>05/16/2025</saleDate>
      <amountOfSecuritiesSold>15000</amountOfSecuritiesSold>
      <grossProceeds>764934</grossProceeds>
    </securitiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>David Schaeffer</name>
        <address>
          <com:street1>C/o Cogent Communications Holdings Inc</com:street1>
          <com:street2>2450 N. Street N.W.</com:street2>
          <com:city>Washington</com:city>
          <com:stateOrCountry>DC</com:stateOrCountry>
          <com:zipCode>20037</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <saleDate>05/20/2025</saleDate>
      <amountOfSecuritiesSold>15000</amountOfSecuritiesSold>
      <grossProceeds>748448</grossProceeds>
    </securitiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>David Schaeffer</name>
        <address>
          <com:street1>C/o Cogent Communications Holdings Inc</com:street1>
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          <com:city>Washington</com:city>
          <com:stateOrCountry>DC</com:stateOrCountry>
          <com:zipCode>20037</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <saleDate>05/21/2025</saleDate>
      <amountOfSecuritiesSold>40000</amountOfSecuritiesSold>
      <grossProceeds>1871449</grossProceeds>
    </securitiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>David Schaeffer</name>
        <address>
          <com:street1>C/o Cogent Communications Holdings Inc</com:street1>
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          <com:city>Washington</com:city>
          <com:stateOrCountry>DC</com:stateOrCountry>
          <com:zipCode>20037</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <saleDate>05/22/2025</saleDate>
      <amountOfSecuritiesSold>25000</amountOfSecuritiesSold>
      <grossProceeds>1155270</grossProceeds>
    </securitiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>David Schaeffer</name>
        <address>
          <com:street1>C/o Cogent Communications Holdings Inc</com:street1>
          <com:street2>2450 N. Street N.W.</com:street2>
          <com:city>Washington</com:city>
          <com:stateOrCountry>DC</com:stateOrCountry>
          <com:zipCode>20037</com:zipCode>
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      </sellerDetails>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <saleDate>05/23/2025</saleDate>
      <amountOfSecuritiesSold>25000</amountOfSecuritiesSold>
      <grossProceeds>1171818</grossProceeds>
    </securitiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>David Schaeffer</name>
        <address>
          <com:street1>C/o Cogent Communications Holdings Inc</com:street1>
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          <com:city>Washington</com:city>
          <com:stateOrCountry>DC</com:stateOrCountry>
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      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <saleDate>05/27/2025</saleDate>
      <amountOfSecuritiesSold>20000</amountOfSecuritiesSold>
      <grossProceeds>972722</grossProceeds>
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      <sellerDetails>
        <name>David Schaeffer</name>
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          <com:city>Washington</com:city>
          <com:stateOrCountry>DC</com:stateOrCountry>
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      <saleDate>05/28/2025</saleDate>
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      <grossProceeds>948174</grossProceeds>
    </securitiesSoldInPast3Months>
    <noticeSignature>
      <noticeDate>05/29/2025</noticeDate>
      <signature>/s/ J.P. Morgan Securities LLC as agent and attorney-in-fact for David Schaeffer</signature>
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</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
