ASP Isotopes made its debut on the JSE on Wednesday, securing a secondary listing under the share code ISO as it looks to broaden its investor base and deepen ties with SA.
The US-based company, with a primary listing on the Nasdaq, develops isotope enrichment technologies for the medical, semiconductor and nuclear energy sectors.
The secondary listing comes as ASP Isotopes advances its planned acquisition of Renergen, an SA producer of liquefied helium and natural gas. The deal was approved by the majority of Renergen shareholders at a meeting in early August and is expected to close by the end of the third quarter.
The deal will combine ASP Isotopes’ operations with Renergen’s helium and gas production, creating a company that spans multiple segments of the critical materials supply chain. Both isotopes and helium are regarded as strategically important due to concerns about supply security.
“While the company’s capital base originates largely from the US and Europe, the bulk of its employees (97%) and all operating facilities remain in SA,” said ASP Isotope chair and CEO Paul Mann. He said the JSE listing was an opportunity to broaden SA investor participation.
ASP Isotopes uses its Pretoria facilities for isotope enrichment and plans to expand production, including a new plant outside SA. The company is also preparing to spin off Quantum Leap Energy, a related business focusing on nuclear fuel, as a separate public entity later this year.
Financially, the acquisition of Renergen is expected to boost ASP Isotopes’ revenue and earnings beginning in 2026, according to company projections. The combined group will produce a range of critical materials including helium, electronic gases and fluorinated products.
In a statement on Wednesday, the JSE said ASP Isotopes’ listing increased the total number of companies on the exchange to 276, with a combined market capitalisation of R22.47-trillion. The listing is the third on the JSE so far this year.
The JSE said the listing followed the JSE’s memorandum of understanding with the Nasdaq, “which aims to facilitate cross-border collaboration and simplify dual and secondary listings”.
“This listing demonstrates the strength of our secondary listing framework and reflects international interest in SA as an investment destination,” said Valdene Reddy, director of capital markets at the JSE.
“ASP Isotopes’ listing also provides local investors access to a company operating in the nuclear isotopes sector.”
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