Exhibit 99.1 HALLIBURTON HALLIBURTON ANNOUNCES FIRST QUARTER 2024 RESULTS • Net income of 0.68perdilutedshare.•Adjustednetincomeperdilutedshareof0.76. • Revenue of 5.8billionandoperatingmarginof17487 million and free cash flow of 206million.•Repurchasesofapproximately250 million of common stock. 1 2 HOUSTON – April 23, 2024 – Halliburton Company (NYSE: HAL) announced today net income of 606million,or0.68 per diluted share, for the first qu ...