The S&P/ASX 200 Index (ASX: XJO) is having a poor session on Tuesday. At the time of writing, the benchmark index is down 0.7% to 8,669.9 points.
Four ASX shares that are not letting that hold them back are listed below. Here's why they are rising.

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DroneShield Ltd (ASX: DRO)
The DroneShield share price is up over 2% to $3.17. This morning, the counter-drone technology company revealed that it has secured a $24.9 million contract linked to the US Department of War's Joint Interagency Task Force 401. The release notes that the contract has an initial value of $19.3 million, but has another $5.6 million in options over a 5-year period. DroneShield's CEO, Angus Bean, commented: "This contract demonstrates the growing requirement for counter-drone capabilities across complex operational environments. Customers are increasingly seeking solutions that combine rapid deployment with persistent airspace security, and DroneShield is well positioned to support these requirements through its range of mobile and fixed-site systems."
Pro Medicus Ltd (ASX: PME)
The Pro Medicus share price is up a further 6% to $152.87. Investors have been buying this health imaging technology company's shares this week after it announced a new contract win. Pro Medicus signed a five-year, A$28 million contract renewal with Allegheny Health Network (AHN). The new contract includes the addition of its Visage 7 Workflow. Commenting on the deal, Pro Medicus' CEO, Dr Sam Hupert, said: "We are very pleased to have played such a key role in AHN's growth over the past 10 years. AHN has now renewed for a third contract term, reflecting the strength of our long-standing partnership and the value our platform continues to deliver across their organisation."
SRG Global Ltd (ASX: SRG)
The SRG Global share price is up 12% to $3.52. This has been driven by news that the diversified infrastructure services company has secured $1.85 billion of contracts with blue-chip clients across a diverse range of sectors. The company's CEO, David Macgeorge, said: "We are pleased to have secured these significant contracts across Australia in a broad range of sectors with blue-chip repeat clients. These contract awards are a further demonstration of our market-leading capabilities as a truly diversified infrastructure services company." In response to the strong performance, management has upgraded its earnings guidance for FY 2026 and provided consensus-beating guidance for FY 2027.
Woodside Energy Group Ltd (ASX: WDS)
The Woodside Energy share price is up 2% to $31.32. The catalyst for this has been a strong rise in oil prices overnight. Traders were bidding oil prices higher after Iran reportedly ended peace talks with the US and vowed to block the Strait of Hormuz.