Exhibit 99.1 HALLIBURTON ANNOUNCES SECOND QUARTER 2025 RESULTS HOUSTON – July 22, 2025 – Halliburton Company (NYSE: HAL) announced today net income of $472 million , or$0.55 per diluted share, for the second quarter of 2025 . This compares to net income for the first quarter of 2025 of $204 million, or$0.24 per diluted share. Adjusted net income 2 in the first quarter of 2025 , excluding impairments and other charges, was $517 million , or$0.60 per diluted share. Halliburton's total revenue for the secon ...