Corning Inc.'s (GLW) first-quarter earnings fell 8.3%, beating analysts' estimates, as the liquid-crystal display maker's margins declined, though sales increased more than analysts had expected.

Shares rose 4.9% to $21.60 in premarket trading on the beat. The stock as of Tuesday's close had risen 2.4% in the past year.

Corning, well-known for making LCD glass, had enjoyed surging profit in recent quarters because of rising demand. LCDs are widely used in smartphones, tablets and TVs. The company earlier this month said it plans to maintain production levels at two of its LCD-glass facilities in Japan.

Corning reported a profit of $748 million, or 47 cents a share, down from $816 million, or 52 cents, a year earlier. Revenue jumped 24% to $1.92 billion.

Analysts polled by Thomson Reuters had most recently forecast earnings of 44 cents on $1.87 billion in revenue.

Gross margin fell to 45.4% from 47.1%.

Display technology sales, the company's biggest revenue driver, rose 1%. So-called "other" income declined 58% to $27 million.

-By Nathan Becker, Dow Jones Newswires; 212-416-2855; nathan.becker@dowjones.com

 
 
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