NEW YORK, July 28, 2026, 08:00 EDT — Premarket trading
- The stock was last trading close to $119 following the report, compared to Monday’s closing price of $143.36.
- The Q3 midpoint suggests annualized core sales of $19.8 billion, which is 1% under Corning’s target for the end of the year.
- Optical Communications accounted for 43.7% of core sales in the second quarter, a rise of five percentage points compared to the prior year.
Shares of Corning Incorporated NYSE:GLW dropped roughly 17% in premarket trading on Tuesday. The stock was last seen around $119 after closing at $143.36 on Monday. If this loss holds, it would represent the company’s largest single-day decline since 2002.
The company surpassed expectations for second-quarter sales and earnings. However, the stock decline highlights increased skepticism over its AI-fiber growth prospects.
The company projected third-quarter core sales between $4.9 billion and $5 billion, with a midpoint of $4.95 billion, landing 0.8% lower than FactSet’s consensus estimate of $4.99 billion. Meanwhile, the midpoint of expected EPS exceeded forecasts by 2.4%.
The composition is important. Corning’s sales midpoint annualizes to $19.8 billion, just 1% off the company’s end-2026 target. The goal appears within reach. The upside surprise, however, was not expected.
| Metric | Corning result or midpoint | Benchmark | Gap |
|---|---|---|---|
| Q2 core sales | $4.74 billion | $4.63 billion consensus | +2.4% |
| Q2 core EPS | $0.78 | $0.76 consensus | +2.6% |
| Q3 core sales | $4.95 billion | $4.99 billion consensus | -0.8% |
| Q3 core EPS | $0.87 | $0.85 consensus | +2.4% |
| Annualized Q3 sales pace | $19.8 billion | $20 billion 2026 goal | -1.0% |
Core metrics exclude GAAP. Corning posted GAAP sales of $4.51 billion and earnings per share of $0.64. The table displays guidance midpoints alongside FactSet consensus projections.
The quarter delivered solid results. Core sales increased by 17%, and core EPS advanced 30%. Core operating margin gained 190 basis points, reaching 20.9%.
Cash conversion saw further gains. Adjusted free cash flow rose to $1.42 billion, surpassing three times the $451 million posted a year earlier.
The main driver was Optical Communications. Revenue surged 32% to $2.07 billion, while segment income climbed 77% to $438 million.
The segment accounted for 43.7% of Corning’s core sales, up from 38.7% the previous year, according to company data. Sales in Enterprise Networks jumped 65%, driven by generative-AI offerings.
Growth outside the optical segment showed weaker performance. Glass Innovations revenue increased by only 1%. Sales in Life Sciences and Emerging Growth Businesses fell 15%.
Solar revenue jumped 90% to $438 million, though the division reported a $7 million loss. Management anticipates improved profits in Q3 following maintenance work and equipment improvements.
Corning CEO Wendell Weeks said the company is “entering a new phase of accelerating growth.” Corning aims for $30 billion in annualized sales by 2028 and $40 billion by 2030. Business Wire
These objectives are supported by major customer agreements. Amazon.com NASDAQ:AMZN entered into a multiyear, multibillion-dollar supply pact. Corning additionally revealed a long-term collaboration with NVIDIA NASDAQ:NVDA.
The collaboration with NVIDIA targets a tenfold increase in U.S. connectivity manufacturing output. Corning intends to expand U.S. fiber production capacity by over 50%.
Investors had previously responded positively to that narrative. Corning’s shares were up 64% for the year as of Monday, though they had dropped 47% since peaking on June 30. The stock declined by 5.1% over the past week from Friday to Friday and slipped another 2.2% on Monday.
Shares in optical sector rivals also declined. Ciena Inc. NYSE:CIEN, Coherent Corp. NYSE:COHR and Lumentum Holdings NASDAQ:LITE dropped about 5% to 6% before the market opened.
Key updates are expected later this week. Corning will hold its earnings call at 8:30 a.m. ET. Meta Platforms NASDAQ:META, a significant buyer of Corning fiber, announces results on Wednesday, followed by Amazon on Thursday.
Risk concentration persists. AI-fiber demand may soften until additional capacity comes online. Demand from glass and life sciences stays subdued, and the solar segment has not reached profitability.
Corning is approaching its 2026 target, but has yet to meet market expectations. The difference—not performance in the second quarter—is the key signal for investors.
