ASP Isotopes Completes Secondary Listing on South Africa Stock Market

AFRICAN STOCKS AND FINANCESeptember 1, 2025 at 10:34 AM UTC

TLDR

The Johannesburg Stock Exchange (JSE) has listed ASP Isotopes Inc. under the share code “ISO,” marking the company’s secondary listing
The advanced materials firm becomes the third new listing on the JSE in 2025
The JSE classified ASP Isotopes under the Chemicals sector with 91,413,109 ordinary shares listed at a par value of $0.01

The Johannesburg Stock Exchange (JSE) has listed ASP Isotopes Inc. under the share code “ISO,” marking the company’s secondary listing alongside its primary Nasdaq listing. The advanced materials firm becomes the third new listing on the JSE in 2025.

ASP Isotopes develops and commercializes isotope enrichment technologies with applications in healthcare, technology, and nuclear energy. Its operations are centered in Pretoria, where it runs three facilities and employs 97% of its global workforce. The company uses proprietary Aerodynamic Separation Process technology for light isotopes and is developing Quantum Enrichment for nuclear energy applications.

Paul Mann, Chairman and CEO, said the listing reflects the company’s South African roots despite its international capital base. The JSE classified ASP Isotopes under the Chemicals sector with 91,413,109 ordinary shares listed at a par value of $0.01. The JSE now hosts 276 companies with a total market capitalization of R22.47 trillion ($1.3 trillion).

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Key Takeaways

ASP Isotopes’ JSE debut highlights the exchange’s drive to attract global companies through secondary listings. The move follows the JSE’s memorandum of understanding with Nasdaq, aimed at simplifying dual and cross-border listings. This partnership underpins the JSE’s strategy to expand access to international capital while reinforcing South Africa’s role in global markets. For ASP Isotopes, the listing broadens its shareholder base and opens South Africa’s deep liquidity pool to fund growth in isotope production. The company is positioned to benefit from rising demand for medical isotopes in cancer diagnostics, industrial applications, and potential nuclear energy expansion. For South African investors, the listing provides rare access to a niche global player in the advanced materials space that is firmly rooted domestically. It also signals that South Africa’s regulatory framework remains competitive for international companies seeking local investor participation.

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