<SEC-DOCUMENT>0001654954-25-001505.txt : 20250214
<SEC-HEADER>0001654954-25-001505.hdr.sgml : 20250214
<ACCEPTANCE-DATETIME>20250214083558
ACCESSION NUMBER:		0001654954-25-001505
CONFORMED SUBMISSION TYPE:	SCHEDULE 13G/A
PUBLIC DOCUMENT COUNT:		2
FILED AS OF DATE:		20250214
DATE AS OF CHANGE:		20250214

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			PTC THERAPEUTICS, INC.
		CENTRAL INDEX KEY:			0001070081
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		ORGANIZATION NAME:           	03 Life Sciences
		IRS NUMBER:				043416587
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SCHEDULE 13G/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-87511
		FILM NUMBER:		25623494

	BUSINESS ADDRESS:	
		STREET 1:		500 WARREN CORPORATE CENTER DRIVE
		CITY:			WARREN
		STATE:			NJ
		ZIP:			07059
		BUSINESS PHONE:		9082227000

	MAIL ADDRESS:	
		STREET 1:		500 WARREN CORPORATE CENTER DRIVE
		CITY:			WARREN
		STATE:			NJ
		ZIP:			07059

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	PTC THERAPEUTICS INC
		DATE OF NAME CHANGE:	19980909

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Camber Capital Management LP
		CENTRAL INDEX KEY:			0001444043
		ORGANIZATION NAME:           	
		IRS NUMBER:				421693587
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SCHEDULE 13G/A

	BUSINESS ADDRESS:	
		STREET 1:		101 HUNTINGTON AVENUE
		STREET 2:		SUITE 2101
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02199
		BUSINESS PHONE:		617-717-6600

	MAIL ADDRESS:	
		STREET 1:		101 HUNTINGTON AVENUE
		STREET 2:		SUITE 2101
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02199

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Camber Capital Management LLC
		DATE OF NAME CHANGE:	20080827
</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:ns0="http://www.sec.gov/edgar/common">
<headerData>
<submissionType>SCHEDULE 13G/A</submissionType>
<filerInfo>
<filer>
<filerCredentials>
<cik>0001444043</cik>
<ccc>XXXXXXXX</ccc>
</filerCredentials>
</filer>
<liveTestFlag>LIVE</liveTestFlag>
</filerInfo>
</headerData>
<formData>
<coverPageHeader>
<amendmentNo>1</amendmentNo>
<securitiesClassTitle>Common Stock $0.001 par value per share</securitiesClassTitle>
<eventDateRequiresFilingThisStatement>12/31/2024</eventDateRequiresFilingThisStatement>
<issuerInfo>
<issuerCik>0001070081</issuerCik>
<issuerName>PTC THERAPEUTICS, INC.</issuerName>
<issuerCusip>69366J200</issuerCusip>
<issuerPrincipalExecutiveOfficeAddress>
<ns0:street1>500 Warren Corporate Center Drive</ns0:street1>
<ns0:city>Warren</ns0:city>
<ns0:stateOrCountry>NJ</ns0:stateOrCountry>
<ns0:zipCode>07059</ns0:zipCode>
</issuerPrincipalExecutiveOfficeAddress>
</issuerInfo>
<designateRulesPursuantThisScheduleFiled>
<designateRulePursuantThisScheduleFiled>Rule 13d-1(c)</designateRulePursuantThisScheduleFiled>
</designateRulesPursuantThisScheduleFiled>
</coverPageHeader>
<coverPageHeaderReportingPersonDetails>
<reportingPersonName>Camber Capital Management LP</reportingPersonName>
<citizenshipOrOrganization>DE</citizenshipOrOrganization>
<reportingPersonBeneficiallyOwnedNumberOfShares>
<soleVotingPower>0</soleVotingPower>
<sharedVotingPower>3200000</sharedVotingPower>
<soleDispositivePower>0</soleDispositivePower>
<sharedDispositivePower>3200000</sharedDispositivePower>
</reportingPersonBeneficiallyOwnedNumberOfShares>
<reportingPersonBeneficiallyOwnedAggregateNumberOfShares>3200000</reportingPersonBeneficiallyOwnedAggregateNumberOfShares>
<aggregateAmountExcludesCertainSharesFlag>N</aggregateAmountExcludesCertainSharesFlag>
<classPercent>4.15</classPercent>
<typeOfReportingPerson>OO</typeOfReportingPerson>
</coverPageHeaderReportingPersonDetails>
<coverPageHeaderReportingPersonDetails>
<reportingPersonName>Stephen DuBois</reportingPersonName>
<citizenshipOrOrganization>X1</citizenshipOrOrganization>
<reportingPersonBeneficiallyOwnedNumberOfShares>
<soleVotingPower>0</soleVotingPower>
<sharedVotingPower>3200000</sharedVotingPower>
<soleDispositivePower>0</soleDispositivePower>
<sharedDispositivePower>3200000</sharedDispositivePower>
</reportingPersonBeneficiallyOwnedNumberOfShares>
<reportingPersonBeneficiallyOwnedAggregateNumberOfShares>3200000</reportingPersonBeneficiallyOwnedAggregateNumberOfShares>
<aggregateAmountExcludesCertainSharesFlag>N</aggregateAmountExcludesCertainSharesFlag>
<classPercent>4.15</classPercent>
<typeOfReportingPerson>IN</typeOfReportingPerson>
</coverPageHeaderReportingPersonDetails>
<items>
<item1>
<issuerName>PTC THERAPEUTICS, INC.</issuerName>
<issuerPrincipalExecutiveOfficeAddress>500 Warren Corporate Center Drive  Warren NJ 07059</issuerPrincipalExecutiveOfficeAddress>
</item1>
<item2>
<filingPersonName>Camber Capital Management LP&#13;
Stephen DuBois</filingPersonName>
<principalBusinessOfficeOrResidenceAddress>Camber Capital Management LP&#13;
Stephen DuBois&#13;
101 Huntington Avenue&#13;
Suite 2101&#13;
Boston, MA 02199</principalBusinessOfficeOrResidenceAddress>
<citizenship>Camber Capital Management LP - Delaware&#13;
Stephen DuBois - United States</citizenship>
</item2>
<item3>
<notApplicableFlag>Y</notApplicableFlag>
</item3>
<item4>
<amountBeneficiallyOwned>Camber Capital Management LP - 3,200,000 shares&#13;
Stephen DuBois - 3,200,000 shares</amountBeneficiallyOwned>
<classPercent>Camber Capital Management LP - 4.15%&#13;
Stephen DuBois - 4.15%&#13;
</classPercent>
<numberOfSharesPersonHas>
<solePowerOrDirectToVote>Camber Capital Management LP - 0 shares&#13;
Stephen DuBois - 0 shares</solePowerOrDirectToVote>
<sharedPowerOrDirectToVote>Camber Capital Management LP - 3,200,000 shares&#13;
Stephen DuBois - 3,200,000 shares</sharedPowerOrDirectToVote>
<solePowerOrDirectToDispose>Camber Capital Management LP - 0 shares&#13;
Stephen DuBois - 0 shares</solePowerOrDirectToDispose>
<sharedPowerOrDirectToDispose>Camber Capital Management LP - 3,200,000 shares&#13;
Stephen DuBois - 3,200,000 shares</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>
<exhibitInfo>Exhibit 1 - Joint Filing Agreement</exhibitInfo>
<signatureInformation>
<reportingPersonName>Camber Capital Management LP</reportingPersonName>
<signatureDetails>
<signature>/s/ Sean George</signature>
<title>Sean George, Chief Financial Officer</title>
<date>02/14/2025</date>
</signatureDetails>
<signatureDetails>
<signature>/s/ Stephen DuBois</signature>
<title>Stephen DuBois, individually</title>
<date>02/14/2025</date>
</signatureDetails>
</signatureInformation>
<signatureInformation>
<reportingPersonName>Stephen DuBois</reportingPersonName>
<signatureDetails>
<signature>/s/ Sean George</signature>
<title>Sean George, Chief Financial Officer</title>
<date>02/14/2025</date>
</signatureDetails>
<signatureDetails>
<signature>/s/ Stephen DuBois</signature>
<title>Stephen DuBois, individually</title>
<date>02/14/2025</date>
</signatureDetails>
</signatureInformation>
</formData>
</edgarSubmission>
</XML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-1
<SEQUENCE>2
<FILENAME>camber_ex1.htm
<DESCRIPTION>JOINT FILING AGREEMENT
<TEXT>
<html><head><title>camber_ex1.htm</title><!--Document created using EDGARMaster--></head><body style="TEXT-ALIGN: left; FONT: 10pt times new roman"><p style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; MARGIN: 0px; text-align:right;"><strong>EXHIBIT 1</strong></p> <p style="font-size:10pt;font-family:times new roman;margin:0px">&nbsp;</p> <p style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; MARGIN: 0px; text-align:center;">JOINT FILING AGREEMENT</p> <p style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; MARGIN: 0px; text-align:justify;">&nbsp;</p> <p style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; MARGIN: 0px; text-align:justify;">This Joint Filing Agreement dated February 14, 2025 is by and between Camber Capital Management LP, a Delaware limited partnership, and Stephen DuBois, an individual (the foregoing are collectively referred to herein as the "Filers"). Each of the Filers may be required to file with the United States Securities and Exchange Commission a statement on Schedule 13G with respect to&nbsp; Common Stock $0.001 par value per share of PTC Therapeutics, Inc. beneficially owned by them from time to time. Pursuant to and in accordance with Rule 13(d)(1)(k) promulgated under the Securities Exchange Act of 1934, as amended, the Filers hereby agree to file a single statement on Schedule 13D and/or 13G (and any amendments thereto) on behalf of each of such parties, and hereby further agree to file this Joint Filing Agreement as an exhibit to such statement, as required by such rule. This Joint Filing Agreement may be terminated by any of the Filers upon one week's prior written notice or such lesser period of notice as the Filers may mutually agree.</p> <p style="font-size:10pt;font-family:times new roman;margin:0px">&nbsp;</p> <p style="font-size:10pt;font-family:times new roman;margin:0px">Executed and delivered as of the date first above written.</p> <p style="font-size:10pt;font-family:times new roman;margin:0px">&nbsp;</p> <p style="margin:0px"> <table style="border-spacing:0;font:10pt times new roman;width:100%" cellpadding="0"> <tr style="height:15px"> <td>&nbsp;</td> <td colspan="2"> <p style="margin:0px">CAMBER CAPITAL MANAGEMENT LP</p></td> <td></td></tr> <tr style="height:15px"> <td style="width:50%;">&nbsp;</td> <td style="width:3%;">&nbsp;</td> <td style="width:35%;">&nbsp;</td> <td style="width:12%;">&nbsp;</td></tr> <tr style="height:15px"> <td></td> <td>By:</td> <td style="BORDER-BOTTOM: black 1px solid;">/s/ Sean George</td> <td></td></tr> <tr style="height:15px"> <td> <p style="margin:0px">&nbsp;</p></td> <td> <p style="margin:0px">&nbsp;</p></td> <td> <p style="margin:0px">Sean George</p></td> <td>&nbsp;</td></tr> <tr style="height:15px"> <td>&nbsp;</td> <td>&nbsp;</td> <td> <p style="margin:0px">Chief Financial Officer</p></td> <td>&nbsp;</td></tr> <tr style="height:15px"> <td>&nbsp;</td> <td>&nbsp;</td> <td>&nbsp;</td> <td>&nbsp;</td></tr> <tr style="height:15px"> <td> <p style="margin:0px">&nbsp;</p></td> <td colspan="2"> <p style="margin:0px">STEPHEN DUBOIS</p></td> <td> <p style="margin:0px">&nbsp;</p></td></tr> <tr style="height:15px"> <td> <p style="margin:0px">&nbsp;</p></td> <td> <p style="margin:0px">&nbsp;</p></td> <td> <p style="margin:0px">&nbsp;</p></td> <td> <p style="margin:0px">&nbsp;</p></td></tr> <tr style="height:15px"> <td> <p style="margin:0px">&nbsp;</p></td> <td> <p style="margin:0px">By:</p></td> <td style="BORDER-BOTTOM: #000000 1px solid;"> <p style="margin:0px">/s/ Stephen DuBois</p></td> <td> <p style="margin:0px">&nbsp;</p></td></tr></table></p> <p style="margin:0px"></p> <p style="font-size:10pt;font-family:times new roman;margin:0px">&nbsp;</p><body>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
