Natural gas has always been the overlooked little brother to crude oil that drives the fossil fuel industry dating back to the famed Drake Well in 1859 in Pennsylvania, which launched the U.S. oil and gas industry.

The dynamics have changed now—especially in the heart of the gassy Marcellus Shale in Pennsylvania. Gas demand is beginning to boom thanks to the electricity feeding frenzy from data centers, skyrocketing liquefied natural gas (LNG) exports, and the ongoing retirements of aging coal plants being replaced by relatively cleaner-burning gas.

Many of the nation’s top gas producers, including Expand Energy, EQT , Range Resources , and Antero Resources , all have major Appalachian footprints and market cap values that have spiked by 25% to 75% the past 12 months.

Meanwhile,

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