Corning Inc. (NYSE:GLW) stock fell sharply Tuesday after the company reported second-quarter 2026 results that exceeded analyst estimates, as investors focused on third-quarter revenue guidance that was broadly in line with Wall Street expectations. The decline also weighed on several optical networking and photonics stocks.
Corning Reports Second-Quarter Earnings Beat
Corning reported adjusted earnings of 78 cents per share, up 30% year over year and above the consensus estimate of 76 cents. Revenue increased 17% to $4.74 billion, exceeding analysts’ estimate of $4.61 billion.
The company also reported a core gross margin of 39.6%, up 120 basis points year over year, and a core operating margin of 20.9%, an increase of 190 basis points.
Guidance Draws Market Attention
For the third quarter, Corning forecast adjusted earnings of 85 cents to 89 cents per share, compared with the analyst consensus estimate of 85 cents. The company projected revenue of $4.9 billion to $5 billion, broadly in line with the consensus estimate of $4.97 billion.
Peer Stocks Move Lower
| Company | Stock Price (USD) | Change (%) |
| Corning | $117.10 | -18.25% |
| Coherent Corp. (NYSE:COHR) | $233.24 | -14.03% |
| Lumentum Holdings Inc. (NASDAQ:LITE) | $620.29 | -12.88% |
| Ciena Corp. (NYSE:CIEN) | $332.97 | -11.70% |
| Littelfuse Inc. (NASDAQ:LFUS) | $380.97 | -5.46% |
| Amphenol Corp. (NYSE:APH) | $141.29 | -5.37% |
AI Investments Remain a Focus
During the quarter, Corning announced a multiyear agreement with Amazon.com Inc. (NASDAQ:AMZN) to supply optical fibre, cable and connectivity solutions for U.S. data center expansion.
The company also expanded its partnership with Nvidia Corporation (NASDAQ:NVDA) to increase U.S. optical connectivity manufacturing capacity and fiber production to support artificial intelligence infrastructure demand.
Photo: T. Schneider / Shutterstock
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