US Gas Stocks Surge 5% in a Day, Market Cap Exceeds $10 Billion

Antero Resources Corporation (AR), a U.S. natural gas producer, jumped 5.54% on the New York Stock Exchange on February 18, closing at $43.80. Trading volume was about 5.7 million shares, and its market capitalization rose to roughly $13.5 billion (approximately KRW 18 trillion), marking a one-day increase of around $790 million (over KRW 1 trillion).

On February 11, the company reported fourth-quarter 2025 results and issued its 2026 guidance, announcing the closing of its HG Energy acquisition and forecasting average production of 4.1 Bcfe/d for the year. Then, on February 24, it completed the sale of its Ohio Utica assets to Northern Oil & Gas and Infinity Natural Resources for $1.2 billion (about KRW 1.6 trillion), formally kicking off its portfolio reshaping. (anteroresources.com)

Headquartered in Denver, Antero Resources is an independent oil and gas developer and a pure-play U.S. gas producer operating in the Marcellus and Utica shales of the Appalachian Basin in West Virginia and Ohio. With the recent HG Energy acquisition, the company has expanded its production base in core Marcellus areas, positioning itself to meet future LNG export opportunities and rising gas demand from increased data-center power requirements. (anteroresources.com)