In afternoon trade, the S&P/ASX 200 Index (ASX: XJO) is on course to record a strong gain. At the time of writing, the benchmark index is up 1.95% to 8,544.3 points.
Four ASX shares that are rising more than most today are listed below. Here's why they are racing higher:
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4DMedical Ltd (ASX: 4DX)
The 4DMedical share price is up 34% to $6.21. Investors have been buying this respiratory imaging technology company's shares after it made a big announcement. 4DMedical revealed that its CT:VQ technology has been deployed at the Mayo Clinic in the United States. The company's managing director and CEO, Andreas Fouras, commented: "Mayo's deployment is uniquely significant. When the world's number one hospital chooses to use your technology, it sends the strongest possible signal to the entire U.S. healthcare market about the clinical value and readiness of CT:VQ."
Brazilian Rare Earths Ltd (ASX: BRE)
The Brazilian Rare Earths share price is up 8.5% to $4.44. This morning, this rare earths developer revealed that it has secured a Trial Mining Licence from Brazil's National Mining Agency for its Monte Alto project in Bahia. This allows for the extraction of up to 2,000 tonnes per annum of material from the deposit. The company's managing director and CEO, Bernardo da Veiga, said: "Securing the Trial Mining Licence is a significant milestone for Monte Alto and a major step forward in BRE's integrated ore-to-oxides development pathway in Brazil."
Clarity Pharmaceuticals Ltd (ASX: CU6)
The Clarity Pharmaceuticals share price is up 18% to $3.63. This has been driven by news that the radiopharmaceuticals company has signed a large-scale manufacturing agreement with US-based company Theragenics. This gives Clarity access to a 134,000 square foot production facility with 14 cyclotrons capable of producing copper 64 at scale. The company notes that copper 64 offers a key advantage over traditional isotopes. This is due to its longer half-life of around 12.7 hours, which provides a shelf life of up to 48 hours.
Tuas Ltd (ASX: TUA)
The Tuas share price is up 5.5% to $6.33. This morning, this Singapore-based telco released its half-year results for FY 2026. Tuas revealed a 25.5% increase in revenue to S$91.9 million and a 27.2% jump in underlying EBITDA to S$41.1 million. Management advised that this strong growth reflects sustained improvement across all key financial metrics, supported by disciplined cost management and operating leverage.
