Shares of Corning Incorporated sank 5.9% to $137.94 on Monday as traders scrambled to reduce risk ahead of the company's Q2 2026 earnings report, due before the bell on Tuesday. The stock has surged roughly 257% over the past 52 weeks , but the last month has been brutal: a 35%-plus retreat from its June 30 all-time high near $272, driven by profit-taking and mounting anxiety over whether AI-linked spending can justify the price tag.
A 175-Year-Old Glass Maker Priced Like a Software Startup
Corning's price-to-earnings ratio stands at roughly 75x, significantly higher than its historical median . Some analysts argue that AI growth and partnerships with Meta and NVIDIA cannot justify such a rich valuation, noting that even after a 30% drop, a 60x forward P/E looks stretched. For shareholders, the math is simple: the stock needs earnings growth to keep accelerating just to stand still.
Big AI Deals Underpin the Bull Case — but Revenue Has Disappointed
Corning has secured a multi-billion-dollar agreement with Amazon to expand U.S. optical fiber production for AI data centers and partnered with NVIDIA to grow domestic manufacturing capacity.
The company plans to boost U.S. optical connectivity manufacturing capacity by 10 times and increase fiber capacity more than 50%. Yet revenue has missed consensus in Q4 2025, Q3 2025, and Q1 2026, so the top line is not keeping up with Wall Street's ambitions. Tomorrow, analysts expect $4.6 billion in revenue — a 14.9% year-over-year increase — and EPS of $0.76, up 26.7% from the year-ago quarter.
Last Quarter's Mixed Results Set an Uneasy Precedent
Corning beat revenue expectations last quarter at $4.35 billion, up 18.1% year over year, but it was a mixed report — EPS merely matched estimates and revenue guidance for the following quarter missed expectations. That soft forward outlook is precisely what triggered the unwinding.
Insiders Sold Heavily While Institutions Bought the Dip
Corning's chief human resources officer sold over 18,000 shares at $210 in June, and insiders unloaded $54.1 million over three months with zero purchases.
Institutional investors took the opposite view — Main Street Research disclosed a $52.7 million position in Q1 , betting the data-center buildout is just beginning.
Tuesday's report must answer one question: is Corning converting landmark AI contracts into actual revenue fast enough to justify even a discounted price? Anything short of a clean beat and strong guidance could accelerate the slide.