Advertisement|Remove ads.

Shares of ASP Isotopes Inc. (ASPI) gained in Monday’s pre-market session amid a global race to secure non-Russian supplies of high assay low-enriched uranium (HALEU), a critical fuel for next-generation nuclear reactors.
The move followed a memorandum of understanding (MoU) signed by the company’s subsidiary, Quantum Leap Energy, with a European nuclear technology company to explore a long-term partnership for HALEU supply.
ASP Isotopes shares were up nearly 5% in Monday’s pre-market trade. ASPI was among the top trending tickers on Stocktwits at the time of writing.
The MoU signed by the ASP Isotopes subsidiary comes amid a push to expand reliable and diversified HALEU production capacity.
Rising demand from advanced nuclear reactor developers, combined with efforts to reduce reliance on Russian nuclear fuel supplies, is increasing the strategic importance of expanding U.S.-based uranium enrichment capacity for both domestic and global markets.
Currently, the U.S. and its allies rely only on a handful of companies for their uranium fuel needs. The U.S. relies on Russia’s TENEX alone for nuclear fuel for 25% of its reactors.
HALEU is considered a key fuel source for many advanced nuclear reactors and small modular reactor designs currently under development.
Retail sentiment on Stocktwits around ASP Isotopes trended in the ‘neutral’ territory at the time of writing.
One bullish user highlighted that ASPI is simultaneously a nuclear energy, AI data center, and semiconductor chip play.
Another user believes that ASPI won’t be under the radar for much longer.
ASP Isotopes said the MoU runs through 2030 and outlines a framework under which the European partner would provide uranium feedstock to QLE for enrichment into HALEU fuel.
The company added that potential deliveries could begin in 2028 and scale through 2036, depending on reactor development timelines and fuel demand.
ASP Isotopes develops isotope enrichment technologies for applications in nuclear medicine, semiconductors, and nuclear energy.
It is also the sole commercial provider of highly-enriched Silicon-28 (Si-28) derived from natural silane (SiH4). Silicon-28 is a critical isotope used in advanced technologies, supporting the development of high-performance microchips, nanowires, and quantum computing systems.
The company operates enrichment facilities in South Africa using its proprietary ASP and Quantum Enrichment technologies focused on light isotopes.
ASPI stock is up 1% year-to-date, but down 7% over the past 12 months. The Range Nuclear Renaissance ETF (NUKZ) is up 68% over the past 12 months, while the iShares Russell 2000 Growth ETF (IWO) is up 41%.
For updates and corrections, email newsroom[at]stocktwits[dot]com.