01—Abstract
Summary
Summary of the 10-K filed February 12, 2026. Cited figures are marked; the original filing is the authoritative source.
Corning Inc. (GLW) closed 2025 with a strong year driven by the Optical Communications segment, which benefited from AI-driven demand for data center and enterprise fiber and connectivity products.
Net sales rose 19% to $15.6 billiona from $13.1 billion, gross margin expanded 3 percentage points to 36%, and GAAP net income attributable to Corning more than tripled to $1.6 billion ($1.83 diluted EPS) from $506 million. Core net sales reached $16.4 billion (up 13%) and core EPS rose 29% to $2.52. Management states it achieved both its Springboard growth target (adding $4 billion in annualized core sales) and its 20% core operating margin target a full year ahead of the end-2026 schedule.
The company guided Q1 2026 core net sales to $4.2b–4.3 billion. Balance sheet and cash flow strengthened, with operating cash flow of $2.7 billion (up from $1.9 billion) and cash of $1.5 billion. Total debt rose to $8.4 billion (41% of total capital, up from 39%) as the company took on roughly $1.4 billion of finance leases, primarily for a solar manufacturing facility in Hemlock, Michigan.
Capital expenditures were $1.3 billionc in 2025, with guidance of about $1.7 billion for 2026. Shareholder returns included $999 million in dividends and $163 million in buybacks, with about $3.0 billion remaining under the 2019 repurchase authorization. The company also declared a quarterly dividend of $0.28 per share for March 2026.
Investor watch items include concentrated customer exposure (top customers account for 28% to 61% of segment sales), growing exposure to the solar business, which posted a segment net loss in 2025 as it ramped capacity, and a $6.0 billiond deferred tax asset recognized with a full valuation allowance. The company also disclosed a February 2026 unfavorable South Korean tax ruling that will trigger a roughly $92 million noncash charge in Q1 2026. Foreign currency remains a material factor, with 57% of sales from international markets and significant yen exposure.
02—Key points
Key Highlights
- Net sales rose 19% to $15.6 billion in 2025, led by Optical Communications, which grew 35% to $6.3 billion on strong AI-related enterprise demand and carrier data center interconnect and fiber-to-the-home demand.
- Gross margin improved to 36% from 33%, with gross margin dollars up 31% to $5.6 billion, reflecting higher volume, price increases, and cost reductions.
- GAAP diluted EPS was $1.83 versus $0.58 in 2024; core EPS rose 29% to $2.52, with core net sales of $16.4 billion and core net income of $2.2 billion.
- Springboard plan targets were achieved a full year early: incremental annualized core sales growth reached the $4 billion goal and the 20% core operating margin target was met as of Q4 2025.
- Operating cash flow increased to $2.7 billion from $1.9 billion, while capital expenditures rose to $1.3 billion and 2026 capex is guided to about $1.7 billion.
- Total debt rose to $8.4 billion (41% of total capital) largely due to about $1.4 billion of new finance leases for the Hemlock, Michigan solar facility, and the company recorded a $6.0 billion deferred tax asset fully offset by a valuation allowance.
- Q1 2026 core net sales guidance is $4.2–4.3 billion, and the company declared a $0.28 quarterly dividend, with $3.0 billion remaining on its share repurchase authorization.
03—One dollar
Follow one dollar
Of each $1.00 of revenue in FY2025, Corning kept $0.10.
- Revenue$15.63B100.0%
- Cost of revenue−$10.01B64.0%
- Gross profit$5.62B36.0%
- Operating costs−$3.34B21.4%
- Operating income$2.28B14.6%
- Interest, other & tax−$683.0M4.4%
- Net income$1.60B10.2%
Where FY2025 revenue went
$15.63B- Cost of revenue: $10.01B, 64% of revenue
- SG&A: $2.12B, 14% of revenue
- Net income: $1.60B, 10% of revenue
- R&D: $800.0M, 5.1% of revenue
- Other operating costs: $420.0M, 2.7% of revenue
- Interest, other & tax: $683.0M, 4.4% of revenue
Kept 10% as net income
Full revenue history →04—Financials
Financial Highlights
Figures from 10-KFY2025filed February 12, 2026Financial Statements
FY2025 against FY2024
| Line item | FY2025FY2024 | Change |
|---|---|---|
| Revenue | $15.63B$13.12B | +19.1% |
| Cost of Revenue | $10.01B$8.84B | +13.2% |
| Gross Profit | $5.62B$4.28B | +31.5% |
| R&D Expenses | $800.00M$800.00M | 0.0% |
| SG&A Expenses | $2.12B$1.93B | +9.9% |
| Operating Income | $2.28B$1.14B | +100.8% |
| Net Income | $1.60B$506.00M | +215.4% |
| EPS (Basic) | $1.87$0.59 | +216.9% |
| EPS (Diluted) | $1.83$0.58 | +215.5% |
| Shares Outstanding (Basic) | 855.00M853.00M | +0.2% |
| Shares Outstanding (Diluted) | 871.00M869.00M | +0.2% |
05—Questions
Frequently Asked Questions
What drove Corning's strong 2025 revenue and earnings growth?
The primary driver was Optical Communications, where sales increased $1.6 billion (35%) to $6.3 billion. Enterprise network sales nearly doubled to $3.2 billion on demand for generative AI data center products, and carrier network sales grew to $3.1 billion on data center interconnect and fiber-to-the-home demand. Higher volume, pricing actions, and cost reductions also lifted gross margin to 36%. Optical Communications segment net income rose 71% to $1.05 billion.
How concentrated is Corning's customer base, and what are the risks?
Concentration is high. In 2025, two combined customers accounted for 28% of Optical Communications segment sales, three for 59% of Display, two for 43% of Specialty Materials, three for 61% of Automotive, and two for 45% of Life Sciences. The loss, insolvency, or consolidation of a key customer could materially reduce sales and cash flows, and large customers have substantial leverage in contract negotiations.
What are the main concerns in the solar and Hemlock businesses?
Hemlock and Emerging Growth Businesses sales rose 33% to $1.46 billion, but segment net income swung to a $26 million loss as the company temporarily increased costs to ramp polysilicon, solar wafer, and solar module capacity. The solar business depends on government manufacturing tax incentives, which are subject to policy change. The company also took on roughly $1.4 billion in finance leases tied to the Hemlock, Michigan solar facility, and expects about $527 million more in leases to commence in 2026.
Is Corning's Display business under pressure?
Display net sales fell 5% to $3.7 billion, primarily because the company reset its constant-currency yen rate from 107 to 120 yen per dollar, which reduced reported sales. Pricing actions substantially offset the impact in profitability, and segment net income declined only 1% to $993 million. Display remains exposed to yen and other currency movements, and a 10% adverse move in the yen could cause a $0.4 billion loss in the fair value of related hedges and debt instruments.
What are the notable one-time or accounting items investors should understand?
GAAP results include several items excluded from core metrics, such as a $150 million translated earnings contract gain, $63 million in litigation charges, $49 million in restructuring and other charges, and $104 million in acquisition-related costs. The effective tax rate was 15.1% versus 27.2% in 2024. In February 2026, a South Korean tax ruling will reduce a $248 million receivable by about $92 million through a noncash charge in Q1 2026. The auditor identified the South Korean tax receivable as a critical audit matter.
06—Continue