In afternoon trade on Tuesday, the S&P/ASX 200 Index (ASX: XJO) is on course to start the week with a decent gain. At the time of writing, the benchmark index is up 1% to 8,951.7 points.
Four ASX shares that are rising more than most today are listed below. Here's why they are charging higher:
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Dateline Resources Ltd (ASX: DTR)
The Dateline Resources share price is up 7.5% to 45.2 cents. Investors have been buying this gold and rare earths explorer's shares following the release of a drilling update. Dateline Resources revealed that elevated chargeability zones have been identified in preliminary induced polarisation (IP) results at both shallow and deeper levels. Commenting on the news, the company's managing director, Stephen Baghdadi, said: "The data supports the theory of a large mineral system with deep structural and sulphide-hosted features that may reflect mineralizing plumbing beyond near-surface ore zones."
Electro Optic Systems Holdings Ltd (ASX: EOS)
The EOS share price is up 1.5% to $10.51. This follows the release of the defence and space company's quarterly update. EOS reported cash receipts from customers totalling $77.3 million for the three months. This represents an increase of $60.8 million compared to the third quarter of 2025. This increase primarily reflects milestone completions achieved on customer contracts during the quarter. The company advised that its order contract backlog currently stands at $459 million. This is an increase of $323 million on the position at the start of 2025.
Karoon Energy Ltd (ASX: KAR)
The Karoon Energy share price is up 3.5% to $1.69. This has been driven by the release of the energy producer's fourth quarter update. Karoon Energy reported quarterly sales volumes of 2.65 MMboe. This is up 5% on the third quarter and 12% during the prior corresponding period. However, due to softer realised oil prices, its sales revenue came in at US$156.1 million, compared to US$164.1 million in the third quarter. Karoon Energy's CEO and managing director, Ms Carri Lockhart, said:
"During the fourth quarter of 2025, the Baúna FPSO achieved its best quarterly efficiency rate (98.8%) since the asset was acquired in 2020. As a result, Baúna production for the full year was at the upper end of our guidance range."
Pro Medicus Ltd (ASX: PME)
The Pro Medicus share price is up 4% to $188.64. Investors have been buying this health imaging technology company's shares following the release of a bullish broker note out of Macquarie. According to the note, the broker has upgraded Pro Medicus' shares to an outperform rating with a $291.30 price target.
