<SEC-DOCUMENT>0001477932-25-007625.txt : 20251016
<SEC-HEADER>0001477932-25-007625.hdr.sgml : 20251016
<ACCEPTANCE-DATETIME>20251016211339
ACCESSION NUMBER:		0001477932-25-007625
CONFORMED SUBMISSION TYPE:	144
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20251016
DATE AS OF CHANGE:		20251016

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			ASP Isotopes Inc.
		CENTRAL INDEX KEY:			0001921865
		STANDARD INDUSTRIAL CLASSIFICATION:	MISCELLANEOUS CHEMICAL PRODUCTS [2890]
		ORGANIZATION NAME:           	08 Industrial Applications and Services
		EIN:				872618235
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		144
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	001-41555
		FILM NUMBER:		251398812

	BUSINESS ADDRESS:	
		STREET 1:		601 PENNSYLVANIA AVENUE NW
		STREET 2:		SOUTH BUILDING, SUITE 900
		CITY:			WASHINGTON
		STATE:			DC
		ZIP:			20004
		BUSINESS PHONE:		202-756-2245

	MAIL ADDRESS:	
		STREET 1:		601 PENNSYLVANIA AVENUE NW
		STREET 2:		SOUTH BUILDING, SUITE 900
		CITY:			WASHINGTON
		STATE:			DC
		ZIP:			20004

REPORTING-OWNER:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Ainscow Robert
		CENTRAL INDEX KEY:			0001951275
		ORGANIZATION NAME:           	

	FILING VALUES:
		FORM TYPE:		144

	MAIL ADDRESS:	
		STREET 1:		C/O ASP ISOTOPES INC.
		STREET 2:		1101 PENNSYLVANIA AVENUE NW, SUITE 300
		CITY:			WASHINGTON DC
		STATE:			DC
		ZIP:			20004
</SEC-HEADER>
<DOCUMENT>
<TYPE>144
<SEQUENCE>1
<FILENAME>primary_doc.xml
<TEXT>
<XML>
<?xml version="1.0" encoding="UTF-8"?><edgarSubmission xmlns="http://www.sec.gov/edgar/ownership" xmlns:ns0="http://www.sec.gov/edgar/common">
<headerData>
<submissionType>144</submissionType>
<filerInfo>
<filer>
<filerCredentials>
<cik>0001951275</cik>
<ccc>XXXXXXXX</ccc>
</filerCredentials>
</filer>
<liveTestFlag>LIVE</liveTestFlag>
</filerInfo>
</headerData>
<formData>
<issuerInfo>
<issuerCik>0001921865</issuerCik>
<issuerName>ASP Isotopes Inc.</issuerName>
<secFileNumber>001-41555</secFileNumber>
<issuerAddress>
<ns0:street1>601 PENNSYLVANIA AVENUE NW</ns0:street1>
<ns0:street2>SOUTH BUILDING, SUITE 900</ns0:street2>
<ns0:city>WASHINGTON</ns0:city>
<ns0:stateOrCountry>DC</ns0:stateOrCountry>
<ns0:zipCode>20004</ns0:zipCode>
</issuerAddress>
<issuerContactPhone>2027562245</issuerContactPhone>
<nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>Ainscow Robert</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
<relationshipsToIssuer>
<relationshipToIssuer>OFFICER</relationshipToIssuer>
</relationshipsToIssuer>
</issuerInfo>
<securitiesInformation>
<securitiesClassTitle>Common Stock</securitiesClassTitle>
<brokerOrMarketmakerDetails>
<name>Independent Trading Group (ITG) Inc.</name>
<address>
<ns0:street1>33 Yonge Street</ns0:street1>
<ns0:street2>Suite 420</ns0:street2>
<ns0:city>Toronto</ns0:city>
<ns0:stateOrCountry>A6</ns0:stateOrCountry>
<ns0:zipCode>M5E 1G4</ns0:zipCode>
</address>
</brokerOrMarketmakerDetails>
<noOfUnitsSold>22500</noOfUnitsSold>
<aggregateMarketValue>299700</aggregateMarketValue>
<noOfUnitsOutstanding>93406629</noOfUnitsOutstanding>
<approxSaleDate>10/14/2025</approxSaleDate>
<securitiesExchangeName>NASDAQ</securitiesExchangeName>
</securitiesInformation>
<securitiesToBeSold>
<securitiesClassTitle>Common Stock</securitiesClassTitle>
<acquiredDate>04/14/2025</acquiredDate>
<natureOfAcquisitionTransaction>Acquired as compensation -- Restricted Stock Award </natureOfAcquisitionTransaction>
<nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
<isGiftTransaction>N</isGiftTransaction>
<amountOfSecuritiesAcquired>40000</amountOfSecuritiesAcquired>
<paymentDate>04/14/2025</paymentDate>
<natureOfPayment>Equity Compensation</natureOfPayment>
</securitiesToBeSold>
<nothingToReportFlagOnSecuritiesSoldInPast3Months>N</nothingToReportFlagOnSecuritiesSoldInPast3Months>
<securitiesSoldInPast3Months>
<sellerDetails>
<name>Ainscow Robert</name>
<address>
<ns0:street1>601 PENNSYLVANIA AVENUE NW SOUTH BUILDIN</ns0:street1>
<ns0:street2>SUITE 900</ns0:street2>
<ns0:city>WASHINGTON</ns0:city>
<ns0:stateOrCountry>DC</ns0:stateOrCountry>
<ns0:zipCode>20004</ns0:zipCode>
</address>
</sellerDetails>
<securitiesClassTitle>Common Stock</securitiesClassTitle>
<saleDate>09/08/2025</saleDate>
<amountOfSecuritiesSold>8438</amountOfSecuritiesSold>
<grossProceeds>71944.92</grossProceeds>
</securitiesSoldInPast3Months>
<noticeSignature>
<noticeDate>10/16/2025</noticeDate>
<planAdoptionDates>
<planAdoptionDate>06/09/2025</planAdoptionDate>
</planAdoptionDates>
<signature>/s/ Robert Ainscow</signature>
</noticeSignature>
</formData>
</edgarSubmission>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
