ASP Isotopes recasts 2025 financials to reflect Skyline construction unit as discontinued

We started presenting the construction services business as discontinued operations in our consolidated financial statements beginning with our Quarterly Report on Form 10-Q for the quarter ended March 31, 2026, which was filed with the SEC on May 20, 2026. As previously disclosed, on March 29, 2026, we entered into the Securities Exchange Agreement and completed the deconsolidation of Skyline Builders Group Holding Limited (“Skyline”). We retained approximately 8.6% percent of the outstanding Class A ordinary and preferred shares of Skyline immediately following the deconsolidation.

Sales from external customers | $ 18,175 | Less: cost of sales | (16,397) | Gross profit | $ 1,778 | Selling, general and administrative expenses | (1,315) | Change in fair value of investments | 17,352 | Other expenses, net | (79) | Income from discontinued operations before income taxes | 17,736 | Income tax expense | (194)

Net loss before allocation to noncontrolling interests

17,542 | Less: Net income attributable to noncontrolling interests | 15,898 | Income from discontinued operations | $ 1,644

On January 6, 2026, the Company completed the acquisition of Renergen and acquired all of the issued Renergen Ordinary Shares from Renergen shareholders in exchange for shares of the Company's common stock at an exchange ratio of 0.09196 shares of Company common stock for each Renergen Ordinary Share (the “Consideration Shares”) through the implementation of the Scheme, resulting in the issuance of an aggregate of 14,270,000 Consideration Shares. As a result of the Transaction, Renergen became a direct, wholly owned subsidiary of ASP Isotopes.

On January 22, 2026, the Company acquired 60% of the issued and outstanding membership interests of NuMed for $0.8 million. NuMed is an independent radiopharmacy dedicated to nuclear medicine and the science of radiopharmaceutical production. In addition to the purchase consideration, the Company has an option to purchase the remaining 40% of the issued and outstanding membership interests within two years following the closing for an agreed consideration totaling $0.5 million.

The Company started presenting the construction services business as discontinued operations in our consolidated financial statements beginning with our Quarterly Report on Form 10-Q for the quarter ended March 31, 2026, which was filed with the SEC on May 20, 2026. As previously disclosed, on March 29, 2026, the Company entered into the Securities Exchange Agreement and completed the deconsolidation of Skyline Builders Group Holding Limited ("Skyline"). The Company retained approximately 8.6% percent of the outstanding Class A ordinary and preferred shares of Skyline immediately following the deconsolidation.

This Form 8-K is being filed by us solely to retrospectively recast certain prior period financial information and related disclosures contained in the 2025 Form 10-K to present the operations of the construction services business as discontinued operations separately from our continuing operations. Included within Exhibit 99.1 to this Form 8-K and incorporated by reference herein are the following items of the 2025 Form 10-K, each recast to present the construction services business as discontinued operations in our consolidated financial information and certain related disclosures:

• Part II, Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations; and

• Part II, Item 8. Financial Statements and Supplementary Data.

The accounting requirements for reporting the separation of Skyline as a discontinued operation were met when the separation was completed. Accordingly, the historical results of Skyline have been presented as discontinued operations and, as such, have been excluded from continuing operations and segment results for all periods presented. Prior to the separation, Skyline was reported within the construction services segment.