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The reporting person undertakes to provide ASP Isotopes Inc. 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These shares were sold in multiple transactions at prices ranging from $6.785 to $7.265, inclusive. The reporting person undertakes to provide ASP Isotopes Inc. 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These shares were sold in multiple transactions at prices ranging from $5.055 to $5.52, inclusive. The reporting person undertakes to provide ASP Isotopes Inc. (the \"Company\"), any stockholder of the Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in Footnote 2."}],"balance_after":1490317,"source":{"system":"sec-edgar","filing":"0001477932-26-002390","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1921865/000147793226002390/form4.xml","form_type":"4"}},{"id":809408,"issuer":{"id":5371,"kind":"organization","name":"ASP Isotopes Inc.","symbol":"ASPI"},"owners":[{"id":10326,"kind":"person","name":"Ainscow Robert","position":1,"cik":"0001951275","reported_name":"Ainscow Robert","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"COO"}}],"security":"Common Stock","published_at":"2026-04-14T01:57:56.000Z","date":"2026-03-06","kind":"sale","planned":true,"acquired":false,"shares":25000,"price":4.511,"value":112775.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Represents sales effected pursuant to a Rule 10b5-1 trading plan adopted by the filing person on December 13, 2024."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $4.42 to $4.58, inclusive. The reporting person undertakes to provide ASP Isotopes Inc. 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These shares were sold in multiple transactions at prices ranging from $5.00 to $5.65, inclusive. The reporting person undertakes to provide ASP Isotopes Inc. 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These shares were sold in multiple transactions at prices ranging from $6.03 to $6.525, inclusive. The reporting person undertakes to provide ASP Isotopes Inc. 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These shares were sold in multiple transactions at prices ranging from $8.31 to $8.79, inclusive. The reporting person undertakes to provide ASP Isotopes Inc. (the \"Company\"), any stockholder of the Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in Footnote 2."}],"balance_after":1411554,"source":{"system":"sec-edgar","filing":"0001477932-25-006620","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1921865/000147793225006620/form4.xml","form_type":"4"}},{"id":1169348,"issuer":{"id":5371,"kind":"organization","name":"ASP Isotopes Inc.","symbol":"ASPI"},"owners":[{"id":10326,"kind":"person","name":"Ainscow Robert","position":1,"cik":"0001951275","reported_name":"Ainscow Robert","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Common Stock","published_at":"2025-04-17T23:57:41.000Z","date":"2025-04-17","kind":"sale","planned":true,"acquired":false,"shares":66668,"price":5.6213,"value":374760.8284,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by Robert Ainscow dated December 13, 2024."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $5.25 to $6.02, inclusive. The reporting person undertakes to provide the Company, any stockholder of the Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in Footnote 4."}],"balance_after":1419992,"source":{"system":"sec-edgar","filing":"0001477932-25-002834","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1921865/000147793225002834/form4.xml","form_type":"4"}},{"id":1169347,"issuer":{"id":5371,"kind":"organization","name":"ASP Isotopes Inc.","symbol":"ASPI"},"owners":[{"id":10326,"kind":"person","name":"Ainscow Robert","position":1,"cik":"0001951275","reported_name":"Ainscow Robert","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Common Stock","published_at":"2025-04-17T23:57:41.000Z","date":"2025-04-16","kind":"sale","planned":true,"acquired":false,"shares":66666,"price":5.4454,"value":363023.0364,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by Robert Ainscow dated December 13, 2024."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $5.26 to $5.70, inclusive. The reporting person undertakes to provide the Company, any stockholder of the Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in Footnote 3."}],"balance_after":1486660,"source":{"system":"sec-edgar","filing":"0001477932-25-002834","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1921865/000147793225002834/form4.xml","form_type":"4"}},{"id":1169346,"issuer":{"id":5371,"kind":"organization","name":"ASP Isotopes Inc.","symbol":"ASPI"},"owners":[{"id":10326,"kind":"person","name":"Ainscow Robert","position":1,"cik":"0001951275","reported_name":"Ainscow Robert","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Common Stock","published_at":"2025-04-17T23:57:41.000Z","date":"2025-04-15","kind":"sale","planned":true,"acquired":false,"shares":66666,"price":5.7535,"value":383562.831,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by Robert Ainscow dated December 13, 2024."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $5.48 to $6.70, inclusive. The reporting person undertakes to provide ASP Isotopes Inc. (the \"Company\"), any stockholder of the Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in Footnote 2."}],"balance_after":1553326,"source":{"system":"sec-edgar","filing":"0001477932-25-002834","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1921865/000147793225002834/form4.xml","form_type":"4"}},{"id":1171549,"issuer":{"id":5371,"kind":"organization","name":"ASP Isotopes Inc.","symbol":"ASPI"},"owners":[{"id":10326,"kind":"person","name":"Ainscow Robert","position":1,"cik":"0001951275","reported_name":"Ainscow Robert","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Common 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date."}],"balance_after":1619992,"source":{"system":"sec-edgar","filing":"0001477932-25-002718","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1921865/000147793225002718/form4.xml","form_type":"4"}},{"id":1410549,"issuer":{"id":5371,"kind":"organization","name":"ASP Isotopes Inc.","symbol":"ASPI"},"owners":[{"id":10326,"kind":"person","name":"Ainscow Robert","position":1,"cik":"0001951275","reported_name":"Ainscow Robert","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Common Stock","published_at":"2024-09-10T22:38:15.000Z","date":"2024-09-06","kind":"grant","planned":false,"acquired":true,"shares":300000,"ownership":{"direct":true},"footnotes":[{"field":"date","element":"transactionDate","label":"F1","text":"This award of common stock shall vest (subject to compliance with applicable vesting conditions) in equal quarterly installments over a four-year period beginning on the grant date."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"This award of common stock shall vest (subject to compliance with applicable vesting conditions) in equal quarterly installments over a four-year period beginning on the grant date."}],"balance_after":1219992,"source":{"system":"sec-edgar","filing":"0001477932-24-005650","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1921865/000147793224005650/form4.xml","form_type":"4"}},{"id":1454369,"issuer":{"id":5371,"kind":"organization","name":"ASP Isotopes Inc.","symbol":"ASPI"},"owners":[{"id":10326,"kind":"person","name":"Ainscow Robert","position":1,"cik":"0001951275","reported_name":"Ainscow 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2024."}],"balance_after":919992,"source":{"system":"sec-edgar","filing":"0001477932-24-004209","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1921865/000147793224004209/form4.xml","form_type":"4"}},{"id":2006240,"issuer":{"id":5371,"kind":"organization","name":"ASP Isotopes Inc.","symbol":"ASPI"},"owners":[{"id":10326,"kind":"person","name":"Ainscow Robert","position":1,"cik":"0001951275","reported_name":"Ainscow Robert","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2023-02-17T17:16:05.000Z","date":"2022-12-30","kind":"grant","acquired":true,"shares":50000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"deemedExecutionDate","element":"deemedExecutionDate","label":"F1","text":"On December 30, 2022, the Company issued 50,000 shares of the Company's restricted common stock to Robert Ainscow as a bonus for services provided during the fiscal year ended December 31, 2022."}],"balance_after":900000,"source":{"system":"sec-edgar","filing":"0001477932-23-001111","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1921865/000147793223001111/primary_doc.xml","form_type":"4"}},{"id":2113977,"issuer":{"id":5371,"kind":"organization","name":"ASP Isotopes Inc.","symbol":"ASPI"},"owners":[{"id":10326,"kind":"person","name":"Ainscow Robert","position":1,"cik":"0001951275","reported_name":"Ainscow Robert","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common 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Mr. Ainscow will receive 150,000 restricted shares of our common stock on November 15, 2023, 150,000 restricted shares of our common stock on November 15, 2024, 150,000 restricted shares of our common stock on November 15, 2025, and 150,000 shares of our restricted common stock on November 15, 2026."}],"balance_after":850000,"source":{"system":"sec-edgar","filing":"0001213900-22-073086","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1921865/000121390022073086/ownership.xml","form_type":"4"}}]}