Corning (NYSE:GLW) delivered the kind of quarter most companies would frame and hang on the wall. Core earnings per share jumped 30% in the second quarter, and management guided to even more growth ahead. The stock’s reward, according to CNBC, was a 12% drop after the report, which dragged other optical stocks down with it.
That reaction says more about expectations than about the business. Corning makes specialty glass and ceramics, from the tough cover glass on smartphones to the panels inside TVs. Its biggest unit today sells optical fiber, cable, and connectors. That’s the plumbing that moves data between servers inside sprawling data centers, which has rapidly transformed the company’s outlook as detailed in recent analysis on Corning’s market positioning. So investors are now paying for an artificial intelligence growth story. Whether that price still makes sense depends less on last quarter’s beat than on how much of Corning’s upgraded long-term plan is already baked into the shares.
Contracts That Lock Customers In
Corning has spent well over a century turning materials science into products other companies design around. That matters here. Once a hyperscaler (a giant cloud operator) builds its network around a fiber and connectivity system, switching suppliers mid-buildout is slow and risky.
The clearest proof arrived in the second quarter. Amazon signed a multiyear, multibillion-dollar agreement for Corning’s fiber, cable, and connectivity in its US data centers. NVIDIA struck a long-term partnership to expand Corning’s US optical connectivity manufacturing capacity tenfold and its US fiber production capacity by more than 50%. While customers don’t commit like that to a commodity vendor, market commentary remains mixed on entry timing after the recent surge, even as Jim Cramer says to wait for Corning (GLW) to fall further before jumping in.
Optical Is Carrying the Load
Optical Communications sales climbed 32% to $2.07 billion, while segment net income rose 77%. Enterprise Networks, the part of the unit serving data centers, grew sales 65%. Margins back up the pricing power. Core operating margin reached 20.9%, up 190 basis points (1.9 percentage points), and core gross margin improved to 39.6%. Adjusted free cash flow hit $1.42 billion, against $451 million a year earlier.
Management also upgraded its Springboard plan at its investor day this spring. It now targets an annualized sales run rate of $20 billion by the end of 2026, $30 billion by the end of 2028, and $40 billion by the end of 2030. For the third quarter, Corning guided to core EPS of $0.85 to $0.89, roughly 28% growth. Operational momentum like this highlights why major optical suppliers are catching broader interest, earning a mention alongside component peers featured in 12 High-Flying Stocks to Invest In.
What If AI Is the Only Engine?
The bear case is that Corning’s growth is narrower than the headlines suggest. Glass Innovations, which now combines the old Display and Specialty Materials units, grew sales just 1%. Automotive rose 2%, and Life Sciences and Emerging Growth sales fell 15%. Solar sales jumped 90%, yet that segment still posted a small loss.
That ties the stock tightly to data center spending. If hyperscalers slow their buildouts, the business with the fastest growth is also the most exposed, a risk shared by other optical networking stocks like Coherent. The long-term Amazon and NVIDIA commitments soften that blow, but they don’t remove it.
Priced for the Plan
Here’s where the debate gets sharp. Corning trades at 47.67 times forward earnings, as of October 9. That’s well above the sector’s 23.23 and its own five-year average of 24.26. Put simply, buyers are paying as if Corning were a very different company from the one that traded in the mid-20s for most of the past five years.
The growth outlook explains much of that premium. Expected EPS growth stands at 33.02% for 2027, and second-quarter core EPS growth of 30% shows the business is already running close to that pace. Yet, despite expanding its market footprint across fiber optics and specialized materials, the company doesn’t make the cut among the 10 Best Aggressive Growth Stocks to Buy According to Wall Street Analysts. But a multiple this rich leaves little cushion. The post-earnings slide after a strong quarter shows how fast sentiment can sour when results are merely great. Corning asks you to pay up growth front that’s still years away.
Hedge fund interest climbed, with 99 funds holding the stock in the most recent quarter, up from 91 in the prior one. Short interest sits at 2.31% of the float, pointing to relatively limited bearish positioning.
Paying Today for 2030’s Corning
The evidence suggests Corning’s moat is widening, as its biggest customers lock in capacity for years. The valuation is the harder sell. At 47.67 times forward earnings, the stock already prices in much of the Springboard plan’s ambition.
The setup suits patient, long-term investors who believe AI data center spending has years left to run and who can stomach sharp swings. If you need a margin of safety, it’s thin here. Two things would change the picture quickly: a cooling in Optical Communications growth, or a third-quarter result that falls short of guidance when Corning reports later this month.
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