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The sale does not represent a discretionary trade by the reporting person."},{"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 $3.885 to $3.9202, 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 this footnote."}],"balance_after":776322,"source":{"system":"sec-edgar","filing":"0001477932-26-005432","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2079961/000147793226005432/form4.xml","form_type":"4"}},{"id":5112,"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":"2026-09-05T01:32:21.000Z","date":"2026-09-02","kind":"sale","planned":true,"acquired":false,"shares":25000,"price":3.905,"value":97625.0,"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 $3.75 to $3.96, 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":2256879,"source":{"system":"sec-edgar","filing":"0001477932-26-005431","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1951275/000147793226005431/form4.xml","form_type":"4"}},{"id":5108,"issuer":{"id":5371,"kind":"organization","name":"ASP Isotopes Inc.","symbol":"ASPI"},"owners":[{"id":10324,"kind":"person","name":"Mann Paul Elliot","position":1,"cik":"0001744816","reported_name":"Mann Paul Elliot","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman and CEO"}}],"security":"Common Stock","published_at":"2026-09-05T01:30:22.000Z","date":"2026-09-04","kind":"sale","planned":true,"acquired":false,"shares":83759,"price":4.1,"value":343411.9,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Represents \"sell to cover\" sales effected pursuant to a Rule 10b5-1 trading plan adopted by the filing person on December 30, 2025 to cover tax withholding obligations in connection with the quarterly vesting of a restricted stock award."},{"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 $3.925 to $4.26, 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 this footnote."}],"balance_after":9328570,"source":{"system":"sec-edgar","filing":"0001477932-26-005430","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1921865/000147793226005430/form4.xml","form_type":"4"}},{"id":5107,"issuer":{"id":5371,"kind":"organization","name":"ASP Isotopes Inc.","symbol":"ASPI"},"owners":[{"id":10324,"kind":"person","name":"Mann Paul Elliot","position":1,"cik":"0001744816","reported_name":"Mann Paul Elliot","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman and CEO"}}],"security":"Common Stock","published_at":"2026-09-05T01:30:22.000Z","date":"2026-09-03","kind":"sale","planned":true,"acquired":false,"shares":83758,"price":3.92,"value":328331.36,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Represents \"sell to cover\" sales effected pursuant to a Rule 10b5-1 trading plan adopted by the filing person on December 30, 2025 to cover tax withholding obligations in connection with the quarterly vesting of a restricted stock award."},{"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 $3.875 to $3.98, 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 this footnote."}],"balance_after":9412329,"source":{"system":"sec-edgar","filing":"0001477932-26-005430","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1921865/000147793226005430/form4.xml","form_type":"4"}},{"id":5106,"issuer":{"id":5371,"kind":"organization","name":"ASP Isotopes Inc.","symbol":"ASPI"},"owners":[{"id":10324,"kind":"person","name":"Mann Paul Elliot","position":1,"cik":"0001744816","reported_name":"Mann Paul Elliot","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman and CEO"}}],"security":"Common Stock","published_at":"2026-09-05T01:30:22.000Z","date":"2026-09-02","kind":"sale","planned":true,"acquired":false,"shares":83758,"price":3.91,"value":327493.78,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Represents \"sell to cover\" sales effected pursuant to a Rule 10b5-1 trading plan adopted by the filing person on December 30, 2025 to cover tax withholding obligations in connection with the quarterly vesting of a restricted stock award."},{"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 $3.75 to $3.96, 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 this footnote."}],"balance_after":9496087,"source":{"system":"sec-edgar","filing":"0001477932-26-005430","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1921865/000147793226005430/form4.xml","form_type":"4"}},{"id":718602,"issuer":{"id":5371,"kind":"organization","name":"ASP Isotopes Inc.","symbol":"ASPI"},"owners":[{"id":33039,"kind":"person","name":"Kiessling Heather","position":1,"cik":"0002026548","reported_name":"Kiessling Heather","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2026-07-03T01:45:24.000Z","date":"2026-07-01","kind":"sale","planned":true,"acquired":false,"shares":23124,"price":6.28,"value":145218.72,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Represents \"sell to cover\" sales effected pursuant to a Rule 10b5-1 trading plan adopted by the filing person on December 19, 2025 to cover tax withholding obligations in connection with the quarterly vesting of a restricted stock award."},{"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 $6.13 to $6.52, 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 this footnote."}],"balance_after":1526252,"source":{"system":"sec-edgar","filing":"0001477932-26-004177","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2026548/000147793226004177/form4.xml","form_type":"4"}},{"id":716932,"issuer":{"id":5371,"kind":"organization","name":"ASP Isotopes Inc.","symbol":"ASPI"},"owners":[{"id":10327,"kind":"person","name":"Ainscow Donald George","position":1,"cik":"0002079961","reported_name":"Ainscow Donald George","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP, Gen Counsel, Secretary"}}],"security":"Common Stock","published_at":"2026-07-03T01:45:10.000Z","date":"2026-06-30","kind":"sale","planned":false,"acquired":false,"shares":100000,"price":6.14,"value":614000.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $6.11 to $6.17, 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 this footnote."}],"balance_after":800000,"source":{"system":"sec-edgar","filing":"0001477932-26-004176","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1921865/000147793226004176/form4.xml","form_type":"4"}},{"id":721194,"issuer":{"id":5371,"kind":"organization","name":"ASP Isotopes Inc.","symbol":"ASPI"},"owners":[{"id":33973,"kind":"person","name":"Wider Todd","position":1,"cik":"0001642715","reported_name":"Wider Todd","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-07-02T01:45:38.000Z","date":"2026-06-30","kind":"sale","planned":false,"acquired":false,"shares":50000,"price":6.12,"value":306000.0,"ownership":{"direct":true},"footnotes":[{"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 $6.10 to $6.25, inclusive. The reporting person undertakes to provide the Company, any stockholder of the\nCompany, 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 this footnote."}],"balance_after":672247,"source":{"system":"sec-edgar","filing":"0001477932-26-004157","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1642715/000147793226004157/form4.xml","form_type":"4"}},{"id":721193,"issuer":{"id":5371,"kind":"organization","name":"ASP Isotopes Inc.","symbol":"ASPI"},"owners":[{"id":33973,"kind":"person","name":"Wider Todd","position":1,"cik":"0001642715","reported_name":"Wider Todd","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-07-02T01:45:38.000Z","date":"2026-06-29","kind":"sale","planned":false,"acquired":false,"shares":50000,"price":6.25,"value":312500.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $6.21 to $6.31, inclusive. The reporting person undertakes to provide ASP Isotopes Inc. (the \"Company\"),\nany 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 this footnote."}],"balance_after":722247,"source":{"system":"sec-edgar","filing":"0001477932-26-004157","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1642715/000147793226004157/form4.xml","form_type":"4"}},{"id":721542,"issuer":{"id":5371,"kind":"organization","name":"ASP Isotopes Inc.","symbol":"ASPI"},"owners":[{"id":34105,"kind":"person","name":"Gorley Michael","position":1,"cik":"0002012446","reported_name":"Gorley Michael","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-07-02T01:45:31.000Z","date":"2026-06-30","kind":"sale","planned":false,"acquired":false,"shares":30000,"price":6.27,"value":188100.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $6.10 to $6.63, inclusive. The reporting person undertakes to provide ASP Isotopes Inc. (the \"Company\"),\nany 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 this footnote."}],"balance_after":87908,"source":{"system":"sec-edgar","filing":"0001477932-26-004156","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2012446/000147793226004156/form4.xml","form_type":"4"}},{"id":742493,"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":"2026-06-11T01:48:01.000Z","date":"2026-06-08","kind":"sale","planned":true,"acquired":false,"shares":8438,"price":6.999,"value":59057.562,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Represents \"sell to cover\" sales effected pursuant to a Rule 10b5-1 trading plan adopted by the filing person on June 9, 2025 to cover tax withholding obligations in connection with the vesting of restricted stock awards."},{"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 $6.785 to $7.265, 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":2281879,"source":{"system":"sec-edgar","filing":"0001477932-26-003753","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1921865/000147793226003753/form4.xml","form_type":"4"}},{"id":750741,"issuer":{"id":5371,"kind":"organization","name":"ASP Isotopes Inc.","symbol":"ASPI"},"owners":[{"id":10324,"kind":"person","name":"Mann Paul Elliot","position":1,"cik":"0001744816","reported_name":"Mann Paul Elliot","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman and CEO"}}],"security":"Common Stock","published_at":"2026-06-04T01:45:38.000Z","date":"2026-06-03","kind":"sale","planned":true,"acquired":false,"shares":83759,"price":7.76,"value":649969.84,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"Represents \"sell to cover\" sales effected pursuant to a Rule 10b5-1 trading plan adopted by the filing person on December 30, 2025 to cover tax withholding obligations in connection with the quarterly vesting of a restricted stock award."},{"field":"price","element":"transactionPricePerShare","label":"F5","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $7.53 to $8.13, 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 this footnote."}],"balance_after":9579845,"source":{"system":"sec-edgar","filing":"0001477932-26-003633","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1744816/000147793226003633/form4.xml","form_type":"4"}},{"id":750740,"issuer":{"id":5371,"kind":"organization","name":"ASP Isotopes Inc.","symbol":"ASPI"},"owners":[{"id":10324,"kind":"person","name":"Mann Paul Elliot","position":1,"cik":"0001744816","reported_name":"Mann Paul Elliot","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman and CEO"}}],"security":"Common Stock","published_at":"2026-06-04T01:45:38.000Z","date":"2026-06-02","kind":"sale","planned":true,"acquired":false,"shares":83758,"price":8.29,"value":694353.82,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"Represents \"sell to cover\" sales effected pursuant to a Rule 10b5-1 trading plan adopted by the filing person on December 30, 2025 to cover tax withholding obligations in connection with the quarterly vesting of a restricted stock award."},{"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 $7.81 to $8.52, 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 this footnote."}],"balance_after":9663424,"source":{"system":"sec-edgar","filing":"0001477932-26-003633","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1744816/000147793226003633/form4.xml","form_type":"4"}},{"id":750739,"issuer":{"id":5371,"kind":"organization","name":"ASP Isotopes Inc.","symbol":"ASPI"},"owners":[{"id":10324,"kind":"person","name":"Mann Paul Elliot","position":1,"cik":"0001744816","reported_name":"Mann Paul Elliot","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chairman and CEO"}}],"security":"Common Stock","published_at":"2026-06-04T01:45:38.000Z","date":"2026-06-01","kind":"sale","planned":true,"acquired":false,"shares":83758,"price":7.88,"value":660013.04,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"Represents \"sell to cover\" sales effected pursuant to a Rule 10b5-1 trading plan adopted by the filing person on December 30, 2025 to cover tax withholding obligations in connection with the quarterly vesting of a restricted stock award."},{"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 $7.49 to $8.14, 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 $5.54 to $6.015, 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 $8.135 to $8.575, 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 2."}],"balance_after":7234378,"source":{"system":"sec-edgar","filing":"0001477932-25-006619","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1744816/000147793225006619/form4.xml","form_type":"4"}},{"id":1049013,"issuer":{"id":5371,"kind":"organization","name":"ASP Isotopes Inc.","symbol":"ASPI"},"owners":[{"id":23722,"kind":"person","name":"Moore Duncan","position":1,"cik":"0001888265","reported_name":"Moore Duncan","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-09-03T21:40:33.000Z","date":"2025-08-29","kind":"sale","planned":false,"acquired":false,"shares":75000,"price":9.2831,"value":696232.5,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale of shares reported in this Form 4 includes an amount for the purpose of satisfying the reporting person's income tax liabilities resulting from the vesting of a previously granted restricted stock award for 200,000 shares pursuant to an issuer equity incentive plan."},{"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 $8.95 to $10.20, 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 $5.25 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. 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These shares were sold in multiple transactions at prices ranging from $5.25 to $6.02, inclusive. 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Jensen and Saville disclaim beneficial ownership of the Issuer's securities reported herein except to the extent of their pecuniary interest therein, if any."}],"balance_after":6566874,"source":{"system":"sec-edgar","filing":"0000902664-24-004969","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1921865/000090266424004969/ownership.xml","form_type":"4"}},{"id":1440237,"issuer":{"id":5371,"kind":"organization","name":"ASP Isotopes Inc.","symbol":"ASPI"},"owners":[{"id":86754,"kind":"organization","name":"AK Jensen Investment Management Ltd","position":1,"cik":"0001962663","reported_name":"AK Jensen Investment Management Ltd","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock, par value $0.01 per share (\"Common Stock\")","published_at":"2024-08-05T20:05:14.000Z","date":"2024-08-01","kind":"sale","planned":false,"acquired":false,"shares":31849,"price":2.4493,"value":78007.7557,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $2.39 to $2.53, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, 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 range set forth herein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The securities to which this filing relates are held directly by certain funds and accounts (\"AK Jensen Funds\") to which AK Jensen Investment Management Limited (\"AK Jensen\") serves as the investment manager. Anders K. Jensen (\"Mr. Jensen\") and Duncan P. Saville (\"Mr. Saville\") may be deemed to indirectly control AK Jensen. AK Jensen and Messrs. Jensen and Saville disclaim beneficial ownership of the Issuer's securities reported herein except to the extent of their pecuniary interest therein, if any."}],"balance_after":6646874,"source":{"system":"sec-edgar","filing":"0000902664-24-004969","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1921865/000090266424004969/ownership.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 Robert","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Common Stock","published_at":"2024-07-15T14:33:49.000Z","date":"2024-07-15","kind":"purchase","planned":false,"acquired":true,"shares":19992,"ownership":{"direct":true},"footnotes":[{"field":"date","element":"transactionDate","label":"F1","text":"Represents shares of Common Stock purchased by the reporting person at the public offering price of $2.50 per share in connection with the issuer's underwritten public offering of Common Stock, which closed on July 15, 2024."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Represents shares of Common Stock purchased by the reporting person at the public offering price of $2.50 per share in connection with the issuer's underwritten public offering of Common Stock, which closed on July 15, 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":1454392,"issuer":{"id":5371,"kind":"organization","name":"ASP Isotopes Inc.","symbol":"ASPI"},"owners":[{"id":10324,"kind":"person","name":"Mann Paul Elliot","position":1,"cik":"0001744816","reported_name":"Mann Paul Elliot","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Common Stock","published_at":"2024-07-15T14:33:33.000Z","date":"2024-07-15","kind":"purchase","planned":false,"acquired":true,"shares":39984,"ownership":{"direct":true},"footnotes":[{"field":"date","element":"transactionDate","label":"F1","text":"Represents shares of Common Stock purchased by the reporting person at the public offering price of $2.50 per share in connection with the issuer's underwritten public offering of Common Stock, which closed on July 15, 2024."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Represents shares of Common Stock purchased by the reporting person at the public offering price of $2.50 per share in connection with the issuer's underwritten public offering of Common Stock, which closed on July 15, 2024."}],"balance_after":5845627,"source":{"system":"sec-edgar","filing":"0001477932-24-004208","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1744816/000147793224004208/form4.xml","form_type":"4"}},{"id":1456714,"issuer":{"id":5371,"kind":"organization","name":"ASP Isotopes Inc.","symbol":"ASPI"},"owners":[{"id":86754,"kind":"organization","name":"AK Jensen Investment Management Ltd","position":1,"cik":"0001962663","reported_name":"AK Jensen Investment Management Ltd","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2024-07-10T21:59:47.000Z","date":"2024-07-10","kind":"purchase","planned":false,"acquired":true,"shares":61849,"price":3.3991,"value":210230.9359,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $3.23 to $3.475, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth herein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The securities to which this filing relates are held directly by certain funds and accounts (\"AK Jensen Funds\") to which AK Jensen Investment Management Limited (\"AK Jensen\") serves as the investment manager. Anders K. Jensen (\"Mr. Jensen\") and Duncan P. Saville (\"Mr. Saville\") may be deemed to indirectly control AK Jensen. AK Jensen and Messrs. Jensen and Saville disclaim beneficial ownership of the Issuer's securities reported herein except to the extent of their pecuniary interest therein, if any."}],"balance_after":6678723,"source":{"system":"sec-edgar","filing":"0000902664-24-004664","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1921865/000090266424004664/ownership.xml","form_type":"4"}},{"id":1456713,"issuer":{"id":5371,"kind":"organization","name":"ASP Isotopes Inc.","symbol":"ASPI"},"owners":[{"id":86754,"kind":"organization","name":"AK Jensen Investment Management Ltd","position":1,"cik":"0001962663","reported_name":"AK Jensen Investment Management Ltd","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2024-07-10T21:59:47.000Z","date":"2024-07-09","kind":"purchase","planned":false,"acquired":true,"shares":30000,"price":3.0499,"value":91497.0,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $3.015 to $3.085, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth herein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The securities to which this filing relates are held directly by certain funds and accounts (\"AK Jensen Funds\") to which AK Jensen Investment Management Limited (\"AK Jensen\") serves as the investment manager. Anders K. Jensen (\"Mr. Jensen\") and Duncan P. Saville (\"Mr. Saville\") may be deemed to indirectly control AK Jensen. AK Jensen and Messrs. Jensen and Saville disclaim beneficial ownership of the Issuer's securities reported herein except to the extent of their pecuniary interest therein, if any."}],"balance_after":6616874,"source":{"system":"sec-edgar","filing":"0000902664-24-004664","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1921865/000090266424004664/ownership.xml","form_type":"4"}},{"id":1456712,"issuer":{"id":5371,"kind":"organization","name":"ASP Isotopes Inc.","symbol":"ASPI"},"owners":[{"id":86754,"kind":"organization","name":"AK Jensen Investment Management Ltd","position":1,"cik":"0001962663","reported_name":"AK Jensen Investment Management Ltd","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock, par value $0.01 per share (\"Common Stock\")","published_at":"2024-07-10T21:59:47.000Z","date":"2024-07-08","kind":"purchase","planned":false,"acquired":true,"shares":70000,"price":3.048,"value":213360.0,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $2.98 to $3.17, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth herein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The securities to which this filing relates are held directly by certain funds and accounts (\"AK Jensen Funds\") to which AK Jensen Investment Management Limited (\"AK Jensen\") serves as the investment manager. Anders K. Jensen (\"Mr. Jensen\") and Duncan P. Saville (\"Mr. Saville\") may be deemed to indirectly control AK Jensen. AK Jensen and Messrs. Jensen and Saville disclaim beneficial ownership of the Issuer's securities reported herein except to the extent of their pecuniary interest therein, if any."}],"balance_after":6586874,"source":{"system":"sec-edgar","filing":"0000902664-24-004664","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1921865/000090266424004664/ownership.xml","form_type":"4"}},{"id":1466151,"issuer":{"id":5371,"kind":"organization","name":"ASP Isotopes Inc.","symbol":"ASPI"},"owners":[{"id":33039,"kind":"person","name":"Kiessling Heather","position":1,"cik":"0002026548","reported_name":"Kiessling Heather","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common 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beginning on the six-month anniversary of the grant date, as previously disclosed in the issuer's Form 8-K filed on June 13, 2024."}],"balance_after":412500,"source":{"system":"sec-edgar","filing":"0001477932-24-004011","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2026548/000147793224004011/form4.xml","form_type":"4"}},{"id":1532168,"issuer":{"id":5371,"kind":"organization","name":"ASP Isotopes Inc.","symbol":"ASPI"},"owners":[{"id":70998,"kind":"person","name":"Ryan Robert John Andrew","position":1,"cik":"0002011790","reported_name":"Ryan Robert John Andrew","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common 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