<SEC-DOCUMENT>0001477932-25-008419.txt : 20251117
<SEC-HEADER>0001477932-25-008419.hdr.sgml : 20251117
<ACCEPTANCE-DATETIME>20251117214949
ACCESSION NUMBER:		0001477932-25-008419
CONFORMED SUBMISSION TYPE:	144
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20251117
DATE AS OF CHANGE:		20251117

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:		251492649

	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>C/O ASP ISOTOPES INC.</ns0:street1>
<ns0:street2>1101 PENNSYLVANIA AVENUE NW, SUITE 300</ns0:street2>
<ns0:city>WASHINGTON DC</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>67500</noOfUnitsSold>
<aggregateMarketValue>438750.00</aggregateMarketValue>
<noOfUnitsOutstanding>110574009</noOfUnitsOutstanding>
<approxSaleDate>11/17/2025</approxSaleDate>
<securitiesExchangeName>NASDAQ</securitiesExchangeName>
</securitiesInformation>
<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>25000</noOfUnitsSold>
<aggregateMarketValue>162500.00</aggregateMarketValue>
<noOfUnitsOutstanding>110574009</noOfUnitsOutstanding>
<approxSaleDate>11/25/2025</approxSaleDate>
<securitiesExchangeName>NASDAQ</securitiesExchangeName>
</securitiesInformation>
<securitiesToBeSold>
<securitiesClassTitle>Common Stock</securitiesClassTitle>
<acquiredDate>11/15/2022</acquiredDate>
<natureOfAcquisitionTransaction>Acquired as compensation --Restricted Stock Award</natureOfAcquisitionTransaction>
<nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
<isGiftTransaction>N</isGiftTransaction>
<amountOfSecuritiesAcquired>600000</amountOfSecuritiesAcquired>
<paymentDate>11/15/2022</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>71945</grossProceeds>
</securitiesSoldInPast3Months>
<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>10/14/2025</saleDate>
<amountOfSecuritiesSold>22500</amountOfSecuritiesSold>
<grossProceeds>305978</grossProceeds>
</securitiesSoldInPast3Months>
<remarks>Each sale of shares reported in this Form 144 is expected to be sold on the date indicated pursuant to a Rule 10b5-1 trading plan. Such transactions include amounts for the purpose of satisfying the Reporting Person's income tax liabilities resulting from the vesting of previously granted restricted stock awards pursuant to an issuer equity incentive plan. The Aggregate Market Value of the shares to be sold is based on the closing market price of $6.50 on November 17, 2025.</remarks>
<noticeSignature>
<noticeDate>11/17/2025</noticeDate>
<planAdoptionDates>
<planAdoptionDate>06/09/2025</planAdoptionDate>
</planAdoptionDates>
<signature>/s/ Robert Ainscow</signature>
</noticeSignature>
</formData>
</edgarSubmission>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
