Welcome to our dedicated page for ASP Isotopes SEC filings (Ticker: ASPI), a comprehensive resource for investors and traders seeking official regulatory documents including 10-K annual reports, 10-Q quarterly earnings, 8-K material events, and insider trading forms.
The ASP Isotopes Inc. (NASDAQ: ASPI) SEC filings page on Stock Titan provides access to the company’s official regulatory documents as filed with the U.S. Securities and Exchange Commission. These filings offer detailed information on ASP Isotopes’ activities as a development stage advanced materials company focused on isotope enrichment technologies, as well as the work of its subsidiaries in nuclear fuels, helium, and related areas.
Through current reports on Form 8-K, ASP Isotopes discloses material events such as the closing of its acquisition of Renergen Limited, a helium and liquefied natural gas producer with operations at the Virginia Gas Project in South Africa. Other 8-K filings describe regulatory approvals for that transaction, private placements of convertible notes issued by its subsidiary Quantum Leap Energy LLC to fund laser enrichment production facilities, and confidential submission of a draft registration statement for a proposed initial public offering of Quantum Leap Energy’s Class A common stock.
The company’s 8-K filings also cover regulatory engagement in the United Kingdom by Quantum Leap Energy Ltd regarding potential High-Assay Low Enriched Uranium (HALEU) production, as well as the acquisition of assets from One 30 Seven Inc. to develop Creber Units for processing water-soluble nuclear waste. These documents provide formal descriptions of transaction terms, use of proceeds, conversion mechanics for notes, and related risk and disclosure language.
ASP Isotopes’ definitive proxy statement on Schedule 14A outlines governance matters, including the annual meeting agenda, director elections, auditor ratification, and voting procedures. The proxy materials also describe the company’s status as an emerging growth company and provide information on its capital structure and shareholder voting rights.
On Stock Titan, investors can use AI-powered tools to read summaries of these filings, quickly identify key sections, and navigate to specific topics such as capital raises, acquisitions, nuclear fuel cycle initiatives, or governance changes. Real-time updates from EDGAR ensure that new 8-Ks, proxy statements, and other relevant filings for ASPI are available as they are published, helping users follow how ASP Isotopes documents its strategic transactions, financing activities, and regulatory developments.
ASP Isotopes Inc. has extended the deadline to complete its planned acquisition of Renergen Limited, giving more time to meet closing conditions. Under the proposed South African scheme of arrangement, Renergen shareholders would receive 0.09196 new ASP Isotopes shares for each Renergen share held on the record date.
The longstop date has been moved from September 30, 2025 to November 28, 2025 to obtain remaining regulatory approval and third-party consents. Implementation of the scheme still depends on approval from the Financial Surveillance Department of the South African Reserve Bank, and both companies continue to work toward timely approval.
Robert Ainscow, Chief Operating Officer of ASP Isotopes Inc. (ASPI), reported multiple transactions on September 8-9, 2025. On 09/08/2025 he executed "sell to cover" sales under a Rule 10b5-1 plan totaling 8,438 shares at a weighted average price of $8.5263 to cover tax withholding from vested restricted stock. On 09/09/2025 he was granted or exercised employee stock options: option grants/exercises include 150,000 options at $0.25, 12,000 options at $2, and 135,000 options at $2, increasing beneficial ownership by option awards to positions listed. Net-share settlements of option exercises resulted in withholding of 4,396, 2,813, and 31,652 shares. After the reported transactions the filing person beneficially owned 1,669,693 shares.
Insider transactions by Paul Elliot Mann, CEO, director and 10% owner of ASP Isotopes Inc. (ASPI). The Form 4 reports multiple transactions on September 8-9, 2025. The filing shows sales totaling 447,263 shares disposed through Rule 10b5-1 "sell to cover" and net-share settlements at weighted-average prices reported around $8.14–$8.58. The reporting person also acquired or was issued stock/derivative awards: 216,000 and 1,000,000 employee stock options (exercise price $2) reported as acquired on 09/09/2025. Following these transactions, the reporting person beneficially owned 8,084,191 shares (direct).
The filing discloses that some dispositions were effected under a 10b5-1 trading plan adopted June 9, 2025 to cover tax withholding for vesting restricted stock and that other share withholdings satisfied option exercise obligations. No additional financial results or forward-looking statements are included.
Form 144 filing for ASP Isotopes Inc. (ASPI) reports a proposed sale of 8,438 shares of common stock through Independent Trading Group (ITG) on NASDAQ with an aggregate market value of $69,191.60. The filer acquired 300,000 shares on 09/06/2024 as a restricted stock award from the issuer and indicates the securities were granted as equity compensation. The filing shows 91,913,109 shares outstanding for the issuer and lists the approximate sale date as 09/08/2025. No securities were reported sold by the filer in the past three months. The notice includes the standard representation that the seller is not aware of undisclosed material adverse information.
Form 144 Notice: The filing discloses a proposed sale of 8,438 shares of common stock of ASP Isotopes Inc. (ASPI) with an aggregate market value of $69,191.60. The securities are to be sold through Independent Trading Group (ITG) Inc., and the sale is identified for 09/08/2025 on the NASDAQ. The filer acquired 300,000 shares on 09/06/2024 as a restricted stock award from the issuer and the acquisition was paid as equity compensation on the same date. The form states there were no sales by the filer in the prior three months and includes the standard signature representation regarding material nonpublic information.
ASP Isotopes Inc. reported that its Board of Directors increased its size to seven members and elected Ralph L. Hunter as a Class II director, effective September 8, 2025. His term will run until the Company’s 2027 annual meeting of stockholders or until earlier resignation or removal, and he was also named to the Board of Managers of Quantum Leap Energy LLC, a wholly owned subsidiary.
Hunter, age 60, has over 35 years of nuclear power generation experience, including leadership roles at RC Nuclear Consultants, Orion Nuclear Energy, and Constellation-related nuclear development entities, as well as service on the U.S. Civil Nuclear Trade Advisory Committee. In connection with his election, he received an award of 10,470 shares of restricted stock under the 2022 Equity Incentive Plan, vesting in full on the one-year anniversary of the grant date, and will be compensated under the Company’s non-employee director compensation policy.
Moore Duncan, a director of ASP Isotopes Inc. (ASPI), reported the sale of 75,000 shares on 08/29/2025 at a weighted average price of $9.2831. After the sale he beneficially owned 994,553 shares. The filing states the sale included shares sold to satisfy income tax liabilities arising from the vesting of a previously granted restricted stock award for 200,000 shares. The weighted-average price represents multiple trades executed between $8.95 and $10.20. The Form 4 was signed by an attorney-in-fact on 09/03/2025. This disclosure records an insider disposition tied to tax withholding for a stock award.
ASP Isotopes Inc. filed a current report to disclose that it issued a letter to shareholders dated September 2, 2025. The company is furnishing this shareholder letter as Exhibit 99.1 under a Regulation FD disclosure item, meaning it is intended to provide broadly available information to the market. The filing specifies that the information in Item 7.01 and Exhibit 99.1 is being furnished, not filed, so it is not subject to certain Exchange Act liabilities and will only be incorporated into other SEC documents if specifically referenced.
ASP Isotopes Inc. (ASPI) filed a Form 144 notifying the proposed sale of 75,000 shares of its common stock through Independent Trading Group (ITG) on the NASDAQ with an aggregate market value of $789,750. The filer acquired 200,000 shares as a restricted stock award on August 16, 2023, paid by equity compensation on that date. The approximate date of sale is listed as August 29, 2025. The filing reports no securities sold during the past three months and includes the standard representation that the seller is not aware of undisclosed material adverse information about the issuer.
ASP Isotopes Inc. reports it will host a corporate access event for South African investors ahead of an anticipated secondary listing of its common stock on the Johannesburg Stock Exchange, with trading on the JSE Main Board expected to begin on August 27, 2025, while retaining its primary Nasdaq listing and not raising new capital in connection with the listing. The company provides operational updates across several isotope programs in Pretoria, including commercial production of Silicon-28, where first enriched samples were shipped to a U.S. customer in August 2025, and Ytterbium-176, where enrichment has reached up to 92.4% and the first fully enriched batch is expected by the end of August 2025 with shipments to follow.
The Ytterbium-176 plant is running in batch mode and has had a 3–4 week delay in equipment for semi-continuous processing, shifting that transition to late third or early fourth quarter 2025 from prior late August guidance. The company has obtained initial permits to import controlled laser equipment for Nickel-64, Gadolinium-160 and Zinc-68 and is accelerating enrichment facility plans. Its Carbon plant, originally prepared for Carbon-14, is now enriching Carbon-12 to 99.99% for a U.S. customer, with first commercial product now expected in September 2025 after a regulatory-related delay, and demand for Carbon-12 is described as significantly higher than for Carbon-14.
ASP Isotopes reiterates expectations to initiate a spin-out of its Quantum Leap Enrichment subsidiary as a standalone public company during the second half of 2025 and continues to anticipate closing the Renergen acquisition in the third quarter of 2025, in each case subject to required approvals and consents. Company, QLE and Renergen representatives also plan to participate in a RedChip conference call on August 28, 2025.
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