ASP Isotopes Inc.
For the period ended Mar 31, 2026. Filed May 20, 2026.
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A company's report for each of its first three quarters. The financial statements are not audited. It shows how the business has moved since the last annual report, and what management says changed.
Mar 31, 2026 · Filed May 20, 2026
ASPI$2.14+3.1%Stored close · as of Nov 9, 2026
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Item 6. Exhibits
| ExhibitNumber | Description |
| 3.1 | Amended and Restated Certificate of Incorporation (incorporated by reference to Exhibit 3.3 to the Form S-1/A filed on November 9, 2022 (File No. 333-267392)). |
| 3.2 | Amended and Restated Bylaws (incorporated by reference to Exhibit 3.2 to the Annual Report on Form 10-K for the year ended December 31, 2023, filed on April 10, 2024). |
| 10.1* | First Addendum to the Term Loan Facility Agreement, between ASP Isotopes Inc., Renergen Limited and ASP Isotopes South Africa Proprietary Limited, dated January 15, 2026. |
| 10.2* | Second Addendum to the Term Loan Facility Agreement, between ASP Isotopes Inc., Renergen Limited and ASP Isotopes South Africa Proprietary Limited, dated February 26, 2026. |
| 10.3* | Third Addendum to the Term Loan Facility Agreement, between ASP Isotopes Inc., Renergen Limited and ASP Isotopes South Africa Proprietary Limited, dated April 16, 2026. |
| 10.4 | Loan Agreement, between Industrial Development Corporation of South Africa Limited and Tetra4 Proprietary Limited, dated December 20, 2021 (incorporated by reference to Exhibit 10.40 to the Annual Report on Form 10-K for the year ended December 31, 2025, filed on April 10, 2026). |
| 10.5 | Amendment, dated October 10, 2023, to Loan Agreement between Industrial Development Corporation of South Africa Limited and Tetra4 Proprietary Limited (incorporated by reference to Exhibit 10.41 to the Annual Report on Form 10-K for the year ended December 31, 2025, filed on April 10, 2026). |
| 10.6 | Amendment, dated September 1, 2025, to Loan Agreement between Industrial Development Corporation of South Africa Limited Tetra4 Proprietary Limited (incorporated by reference to Exhibit 10.42 to the Annual Report on Form 10-K for the year ended December 31, 2025, filed on April 10, 2026). |
| 10.7 | Finance Agreement, between U.S. International Development Finance Corporation, as successor in interest to Overseas Private Investment Corporation, and Tetra4 Proprietary Limited, dated August 20, 2019 (incorporated by reference to Exhibit 10.43 to the Annual Report on Form 10-K for the year ended December 31, 2025, filed on April 10, 2026). |
| 10.8 | Amendment No. 1 to Finance Agreement, between United States International Development Finance Corporation and Tetra 4 Proprietary Limited, dated March 30, 2020 (incorporated by reference to Exhibit 10.44 to the Annual Report on Form 10-K for the year ended December 31, 2025, filed on April 10, 2026). |
| 10.9 | Amendment No. 2 to Finance Agreement, between United States International Development Finance Corporation and Tetra4 Proprietary Limited, dated April 28, 2020 (incorporated by reference to Exhibit 10.45 to the Annual Report on Form 10-K for the year ended December 31, 2025, filed on April 10, 2026). |
| 10.10 | Amendment No. 3 to the Finance Agreement, between United States International Development Finance Corporation and Tetra4 Proprietary Limited, dated February 27, 2021 (incorporated by reference to Exhibit 10.46 to the Annual Report on Form 10-K for the year ended December 31, 2025, filed on April 10, 2026). |
| 10.11 | Amendment No. 4 to Finance Agreement, between United States International Development Finance Corporation and Tetra4 Proprietary Limited, dated August 24, 2021 (incorporated by reference to Exhibit 10.47 to the Annual Report on Form 10-K for the year ended December 31, 2025, filed on April 10, 2026). |
| 10.12 | Amendment No. 5 to Finance Agreement, between United States International Development Finance Corporation and Tetra4 Proprietary Limited, dated December 16, 2021 (incorporated by reference to Exhibit 10.48 to the Annual Report on Form 10-K for the year ended December 31, 2025, filed on April 10, 2026). |
| 10.13*# | Consent and Waiver, dated January 12, 2024, in connection with the Finance Agreement between U.S. International Development Finance Corporation and Tetra4 Proprietary Limited. |
| 10.14*# | Consent and Waiver, dated March 12, 2024, in connection with the Finance Agreement between U.S. International Development Finance Corporation and Tetra4 Proprietary Limited. |
| 10.15*# | Consent and Waiver, dated August 30, 2024, in connection with the Finance Agreement between U.S. International Development Finance Corporation and Tetra4 Proprietary Limited. |
| 10.16*# | Consent and Waiver, dated December 9, 2024, in connection with the Finance Agreement between U.S. International Development Finance Corporation and Tetra4 in Proprietary Limited. |
| 10.17*# | Waiver, dated April 9, 2025, in connection with the Finance Agreement between U.S. International Development Finance Corporation and Tetra4 Proprietary Limited. |
| 10.18*# | Consent and Waiver, dated November 25, 2025, in connection with the Finance Agreement between U.S. International Development Finance Corporation and Tetra4 Proprietary Limited. |
| 10.19 | Amended and Restated Secured Term Loan Facility Agreement between Renergen Limited and the Standard Bank of South Africa Limited, dated December 12, 2025 (incorporated by reference to Exhibit 10.49 to the Annual Report on Form 10-K for the year ended December 31, 2025, filed on April 10, 2026). |
| 10.20* | Production Right granted by the Republic of South Africa to Molopo South Africa Exploration and Production Proprietary Limited on September 20, 2012. |
| 10.21* | Amendment/Variation of a Production Right granted by the Republic of South Africa to Tetra4 Proprietary Limited on September 17, 2021. |
| 10.22* | Amendment/Variation of a Production Right granted by the Republic of South Africa to Tetra4 Proprietary Limited on March 15, 2024. |
| 10.23* | Exploration Right granted by the Republic of South Africa to Highland Exploration and Production Proprietary Limited on May 8, 2007. |
| 10.24* | Exploration Right granted by the Republic of South Africa to Highland Exploration and Production Proprietary Limited on May 26, 2009. |
| 10.25*# | Liquified Natural Gas Supply Agreement between Tetra4 Proprietary Limited and Consol Glass Proprietary Limited, effective as of June 24, 2022. |
| 10.26* | Series Seed-1 Preferred Stock Purchase Agreement, between ASP Isotopes Inc. and Opeongo, Inc., dated January 26, 2026. |
| 10.27* | Investors’ Rights Agreement, by and among Opeongo, Inc., ASP Isotopes Inc., and the Key Holders named therein, dated January 26, 2026. |
| 10.28* | Right of First Refusal and Co-Sale Agreement, by and among Opeongo, Inc., ASP Isotopes Inc.,and the Key Holders named therein, dated January 26, 2026. |
| 10.29* | Voting Agreement, by and among Opeongo, Inc., ASP Isotopes Inc., and the Key Holders named therein, dated January 26, 2026. |
| 31.1* | Certification of Principal Executive Officer Required Under Rule 13a-14(a) and 15d-14(a) of the Securities Exchange Act of 1934, as amended. |
| 31.2* | Certification of Principal Financial Officer Required Under Rule 13a-14(a) and 15d-14(a) of the Securities Exchange Act of 1934, as amended. |
| 32.1** | Certification of Principal Executive Officer and Principal Financial Officer Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002. |
| 101.INS | Inline XBRL Instance Document - the instance document does not appear in the Interactive Data File because XBRL tags are embedded within the Inline XBRL document. |
| 101.SCH | Inline XBRL Taxonomy Extension Schema With Embedded Linkbase Documents |
| 104 | Cover Page Interactive Data File (embedded within the Inline XBRL document) |
- Exhibits filed herewith.
** Exhibits furnished herewith.
- Management contract or compensatory plan or arrangement.
Information in this exhibit has been omitted pursuant to Item 601 of Regulation S-K.
Certain instruments defining rights of holders of long-term debt of the company are omitted pursuant to Item 601(b)(4)(iii) of Regulation S-K. Upon request, the company agrees to furnish to the SEC copies of such instruments.
The text of this filing, as the company filed it with the SEC, without its images or exhibits. This is not investment advice.