A rancorous divorce, a feud between billionaires and the future of a trading powerhouse.

The future continues to look very bright for the company's material of choice.

Sigma, a leader in AI applications for business, today announced its expansion into Asia Pacific and Japan (APJ) with the ...

By Fabio Teixeira RIO DE JANEIRO, Feb 3 (Reuters) - Sigma Lithium's waste piles at a Brazilian mine offer no "imminent risk" and the country's mining regulator saw no need to shut them down during a ...

Sigma Lithium said it resumed mining activities at its Mine 1 in Vale do Jequitinhonha in Brazil, concluding the restructuring of mining operations aimed at increasing operating efficiency.

U.S.-based hedge fund Two Sigma's co-founders John Overdeck and David Siegel will step down as co-chief executive officers of the hedge fund, according to a statement on Wednesday. Two Sigma said its ...

Sigma's bokeh master is a hefty and pricey bit of glass, but it can shoot some of the dreamiest portraits you'll see ...