Appendix 4D Half Year Report

• Revenue up 40.57% to $1.44 billion
• Profit after tax up 52.62% to $64.9 million
• Interim dividend increased 48.5% to 49 cents per share

Monadelphous Group Ltd has reported a strong financial performance for the half-year ended 31 December 2025. Revenue increased by 40.57% to $1.44 billion, while profit after tax attributable to members rose by 52.62% to $64.9 million. The company has declared an interim dividend of 49 cents per share, up 48.5% from the previous corresponding period. The Group acquired 100% of the share capital of High Energy Service Pty Ltd, High Energy Service Group Pty Ltd, and Kerman Contracting Pty Ltd during the half-year. Monadelphous maintains its 60% interest in the Mondium Pty Ltd joint venture and 55% interest in the Zenviron Pty Ltd joint venture.

The company has not provided any high-importance, price-sensitive forward-looking financial metrics.

Monadelphous has not provided any forward-looking outlook statements.