Warrior reported fourth quarter 2018 net income of $374.2 million, or $7.11 per diluted share, compared to net income of $97.2 million, or $1.83 per diluted share, in the fourth quarter of 2017.

Corsa reported net and comprehensive income of $10.3 million, or $0.09 per share attributable to shareholders, for the fourth quarter 2018, compared to $83.5 million, or $0.74 per share attributable to shareholders, for the fourth quarter 2017.

Weekly U.S. coal production totaled an estimated 13.78 million st in the week that ended February 16, up 5.6% from a week earlier but down 10% compared with the year-ago week, U.S. Energy Information Administration data showed Thursday.

After hitting a near-term low in early 2016, average U.S. coal mining employment has risen steadily as total production hovers below a rate of 200 million tons per quarter, though the overall trends belie regional differences.

Warrior Met Coal is weighing up options to develop its Blue Creek mine in Alabama, targeting expansion into the high-volatile type A coking coal market.

China's metallurgical coal buyers remained largely unfazed Friday as more details emerged of port restrictions tightening on cargoes arriving from main supplier Australia, market sources said.