Exhibit 99.1 HALLIBURTON HALLIBURTON ANNOUNCES FIRST QUARTER 2024 RESULTS • Net income of $0.68 per diluted share. • Adjusted net income per diluted share of $0.76. • Revenue of $5.8 billion and operating margin of 17%. • Cash flow from operations of $487 million and free cash flow of $206 million. • Repurchases of approximately $250 million of common stock. 1 2 HOUSTON – April 23, 2024 – Halliburton Company (NYSE: HAL) announced today net income of $606 million, or $0.68 per diluted share, for the first qu ...