Organization	6 Months Ended
Jun. 30, 2026
Organization
Organization	1. Organization Description of Business ASP Isotopes Inc. was incorporated in the state of Delaware on September 13, 2021 and has its headquarters in Dallas, Texas. ASP Isotopes Inc., its subsidiaries and ASP Rentals (Pty) Ltd ("ASP Rentals") are collectively referred to as “the Company” throughout these condensed consolidated financial statements. The Company is an advanced materials company dedicated to the development of a differentiated isotope enrichment platform to strengthen global supply chain access to critical materials used in nuclear medicine, next-generation semiconductors, and nuclear energy. Our proprietary enrichment technologies, the Aerodynamic Separation Process (“ASP technology”) and Quantum Enrichment technology (“QE technology”), are designed to enable the production of isotopes for a range of industrial and advanced technology applications. Our initial focus is on the production and commercialization of enriched Carbon-14 (“C-14”), Silicon-28 (“Si-28”) and Ytterbium-176 (“Yb-176”). Quantum Leap Energy LLC (“QLE”), the Company's subsidiary, is currently pursuing an initiative to apply its enrichment technologies to the enrichment of Uranium-235 (“U-235”) in South Africa. The Company believes that the U-235 QLE may produce has the potential to be commercialized as a nuclear fuel component for use in the new generation of high-assay low-enriched uranium (“HALEU”)-fueled small modular reactors that are now under development for commercial and government uses. In furtherance of the Company's uranium enrichment initiative, in October 2024, the Company entered into a term sheet with TerraPower, LLC (“TerraPower”) which contemplates the parties entering into definitive agreements pursuant to which TerraPower would provide funding for the construction of a HALEU production facility and agree to purchase all HALEU produced at the facility over a 10-year period after the planned completion of the facility. In addition, in November 2024, the Company entered into a memorandum of understanding with The South African Nuclear Energy Corporation (“Necsa”), a South African state-owned company responsible for undertaking and promoting research and development in the field of nuclear energy and radiation sciences, to collaborate on the research, development and ultimately the commercial production of advanced nuclear fuels. As part of the collaboration contemplated by the MOU with Necsa, QLE’s South African subsidiary has entered into a Pre-Implementation Services Contract Agreement (“Services Contract”) with Necsa, pursuant to which Necsa has agreed to provide to QLE’s South African subsidiary certain facilities, infrastructure, utilities and services related to the siting, design, construction, commission and operation of an enrichment facility on the Necsa site in Pelindaba. See the section captioned “TerraPower” below (Note 13) for disclosures regarding certain definitive agreements entered into between TerraPower and us and/or the Company's subsidiaries, including a term loan subject to conditions to support construction of a new uranium enrichment facility at Pelindaba, South Africa and supply agreements for the future supply of HALEU to TerraPower, as a customer. QLE acquired a controlling interest in Skyline in August 2025. Skyline is a holding company, and its operations are conducted through its wholly owned operating subsidiaries, Kin Chiu Engineering Limited and Kin Chiu Development Company Limited. Operations primarily consist of construction activities which include public civil engineering works, such as road and drainage works, in Hong Kong. Skyline mostly undertakes civil engineering works in the role as a subcontractor but is fully qualified to undertake such works in the capacity of a main contractor. QLE intends to pursue opportunities to acquire assets in the critical materials supply chain. QLE entered into the Securities Exchange Agreement (the "Exchange Agreement") with a third party, effective as of March 29, 2026, which resulted in the deconsolidation of Skyline (Note 21). QLE retained approximately 8.6% percent of the outstanding Class A ordinary and preferred shares of Skyline immediately following deconsolidation. The Company acquired Renergen in January 2026. Renergen is South Africa’s leading onshore natural gas explorer and the first integrated producer of both liquid helium and LNG, both of which are produced from the natural gas reserve base that underpins Renergen’s natural gas development project (the “Virginia Gas Project”). The Virginia Gas Project includes (i) the liquefaction of natural gas into LNG, (ii) the separation of helium from natural gas, and (iii) the further liquefaction of helium into 99.999% pure liquid helium. This liquefaction and separation takes place at Renergen’s natural gas processing plant in the Free State Province of South Africa. Renergen’s principal asset is its 94.5% equity ownership in Tetra4, which holds an onshore petroleum production right and is the entity developing and operating the Virginia Gas Project. Liquidity The Company has incurred net losses and negative cash flows from operating activities since its inception. The Company incurred net losses from continuing operations of $60.7 million and $83.6 million for the six months ended June 30, 2026 and 2025, respectively. The Company currently expects that its cash and cash equivalents of $219.6 million and short-term investments of $35.3 million as of June 30, 2026, will be sufficient to fund its operating expenses and capital requirements for more than 12 months from the date the financial statements are issued. There can be no assurance that the Company will achieve or sustain positive cash flows from operations or profitability. The Company anticipates it will need to continue to raise capital through additional equity and/or debt financings and/or collaborative development agreements to fund its operations. However, such funding may not be available on a timely basis on terms acceptable to the Company, or at all. If the Company is unable to raise additional capital when required or on acceptable terms, the Company may be required to scale back or discontinue the advancement of product candidates, reduce headcount, reorganize, merge with another entity, or cease operations.

Organization

6 Months Ended

Jun. 30, 2026

1. Organization

Description of Business

ASP Isotopes Inc. was incorporated in the state of Delaware on September 13, 2021 and has its headquarters in Dallas, Texas. ASP Isotopes Inc., its subsidiaries and ASP Rentals (Pty) Ltd ("ASP Rentals") are collectively referred to as “the Company” throughout these condensed consolidated financial statements.

The Company is an advanced materials company dedicated to the development of a differentiated isotope enrichment platform to strengthen global supply chain access to critical materials used in nuclear medicine, next-generation semiconductors, and nuclear energy. Our proprietary enrichment technologies, the Aerodynamic Separation Process (“ASP technology”) and Quantum Enrichment technology (“QE technology”), are designed to enable the production of isotopes for a range of industrial and advanced technology applications. Our initial focus is on the production and commercialization of enriched Carbon-14 (“C-14”), Silicon-28 (“Si-28”) and Ytterbium-176 (“Yb-176”).

Quantum Leap Energy LLC (“QLE”), the Company's subsidiary, is currently pursuing an initiative to apply its enrichment technologies to the enrichment of Uranium-235 (“U-235”) in South Africa. The Company believes that the U-235 QLE may produce has the potential to be commercialized as a nuclear fuel component for use in the new generation of high-assay low-enriched uranium (“HALEU”)-fueled small modular reactors that are now under development for commercial and government uses. In furtherance of the Company's uranium enrichment initiative, in October 2024, the Company entered into a term sheet with TerraPower, LLC (“TerraPower”) which contemplates the parties entering into definitive agreements pursuant to which TerraPower would provide funding for the construction of a HALEU production facility and agree to purchase all HALEU produced at the facility over a 10-year period after the planned completion of the facility. In addition, in November 2024, the Company entered into a memorandum of understanding with The South African Nuclear Energy Corporation (“Necsa”), a South African state-owned company responsible for undertaking and promoting research and development in the field of nuclear energy and radiation sciences, to collaborate on the research, development and ultimately the commercial production of advanced nuclear fuels. As part of the collaboration contemplated by the MOU with Necsa, QLE’s South African subsidiary has entered into a Pre-Implementation Services Contract Agreement (“Services Contract”) with Necsa, pursuant to which Necsa has agreed to provide to QLE’s South African subsidiary certain facilities, infrastructure, utilities and services related to the siting, design, construction, commission and operation of an enrichment facility on the Necsa site in Pelindaba. See the section captioned “TerraPower” below (Note 13) for disclosures regarding certain definitive agreements entered into between TerraPower and us and/or the Company's subsidiaries, including a term loan subject to conditions to support construction of a new uranium enrichment facility at Pelindaba, South Africa and supply agreements for the future supply of HALEU to TerraPower, as a customer.

QLE acquired a controlling interest in Skyline in August 2025. Skyline is a holding company, and its operations are conducted through its wholly owned operating subsidiaries, Kin Chiu Engineering Limited and Kin Chiu Development Company Limited. Operations primarily consist of construction activities which include public civil engineering works, such as road and drainage works, in Hong Kong. Skyline mostly undertakes civil engineering works in the role as a subcontractor but is fully qualified to undertake such works in the capacity of a main contractor. QLE intends to pursue opportunities to acquire assets in the critical materials supply chain.

QLE entered into the Securities Exchange Agreement (the "Exchange Agreement") with a third party, effective as of March 29, 2026, which resulted in the deconsolidation of Skyline (Note 21). QLE retained approximately 8.6% percent of the outstanding Class A ordinary and preferred shares of Skyline immediately following deconsolidation.

The Company acquired Renergen in January 2026. Renergen is South Africa’s leading onshore natural gas explorer and the first integrated producer of both liquid helium and LNG, both of which are produced from the natural gas reserve base that underpins Renergen’s natural gas development project (the “Virginia Gas Project”). The Virginia Gas Project includes (i) the liquefaction of natural gas into LNG, (ii) the separation of helium from natural gas, and (iii) the further liquefaction of helium into 99.999% pure liquid helium. This liquefaction and separation takes place at Renergen’s natural gas processing plant in the Free State Province of South Africa. Renergen’s principal asset is its 94.5% equity ownership in Tetra4, which holds an onshore petroleum production right and is the entity developing and operating the Virginia Gas Project.

Liquidity

The Company has incurred net losses and negative cash flows from operating activities since its inception. The Company incurred net losses from continuing operations of $60.7 million and $83.6 million for the six months ended June 30, 2026 and 2025, respectively. The Company currently expects that its cash and cash equivalents of $219.6 million and short-term investments of $35.3 million as of June 30, 2026, will be sufficient to fund its operating expenses and capital requirements for more than 12 months from the date the financial statements are issued.

There can be no assurance that the Company will achieve or sustain positive cash flows from operations or profitability. The Company anticipates it will need to continue to raise capital through additional equity and/or debt financings and/or collaborative development agreements to fund its operations. However, such funding may not be available on a timely basis on terms acceptable to the Company, or at all. If the Company is unable to raise additional capital when required or on acceptable terms, the Company may be required to scale back or discontinue the advancement of product candidates, reduce headcount, reorganize, merge with another entity, or cease operations.