HIGHOutside partyCustomer
61%
top-3 Automotive customers
“10-K Item 1A: 'Automotive | 3 | | 61 | %'”
GLW · Concentration risk · 10-K extracted
Corning (GLW) concentration risks
Updated
The most significant concentration Corning discloses is top-3 Automotive customers at 61%, classified HIGH by disclosed size. Below: the full set from the latest 10-K — verbatim quotes, filing references, and a synthesis of what these exposures mean together.
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Source: Corning’s SEC Form 10-K filed — view the filing on SEC EDGAR ↗
At a glance
Disclosed-size breakdown · 6 disclosed concentrations
HIGH3
MEDIUM2
LOW1
Disclosed concentrations
Each card carries a disclosed-size chip (HIGH / MEDIUM / LOW — how large the exposure is as a share of revenue, not how dangerous it is) and a nature tag: Built-in(the company’s own model, geography, or products) or Outside party (an external customer, supplier, or distributor it relies on).
HIGHOutside partyCustomer
59%
top-3 Display customers
“10-K Item 1A: 'Display | 3 | | 59 | %'”
HIGHOutside partySupplier
sole-sourced materials
“10-K Item 1: 'Certain key materials and proprietary equipment used in the manufacturing of products are currently sole-sourced or available only from a limited number of suppliers'”
MEDIUMOutside partyCustomer
45%
top-2 Life Sciences customers
“10-K Item 1A: 'Life Sciences | 2 | | 45 | %'”
MEDIUMOutside partyCustomer
43%
top-2 Specialty Materials customers
“10-K Item 1A: 'Specialty Materials | 2 | | 43 | %'”
LOWOutside partyCustomer
28%
top-2 Optical Communications customers
“10-K Item 1A: 'Optical Communications | 2 | | 28 | %'”
TrendMatrix Research · concentration synthesis
What these concentrations mean together
updated 2026-07-03The company's concentration profile spans multiple business segments and combines customer dependency with a supply-side structural risk. In Automotive and Display, the disclosed top-customer groups each account for a high share of their respective segment revenues, making these the two most concentrated customer pools in the portfolio. Both are dependency exposures: revenue in each segment is tied to a small set of buyers whose platform decisions and capital programs drive order flow. Layered on top is a supply-side risk: certain key materials and proprietary equipment used in manufacturing are currently sole-sourced or available only from a limited number of suppliers, a high-share dependency that cuts across segments and could compress margins if supply is disrupted. In Life Sciences and Specialty Materials, the top-customer groups each represent a medium share of their respective segment revenues, a more balanced posture than in the Automotive and Display units. Optical Communications carries the lowest disclosed customer concentration across the segments. The overall picture is of a diversified multi-segment business where customer dependency is most acute in Automotive and Display, supply-side vulnerability is cross-cutting, and the remaining segments are progressively less concentrated. The supply chain risk — sole-sourced materials across manufacturing lines — is the one exposure that could affect the entire enterprise simultaneously and deserves the most investor attention.
For the engine’s reasoning on GLW’s current verdict — including which dimensions drove the score — see the per-dimension breakdown.
Industry peers · Electronic Components
Peer concentration profile
| Symbol | Name | HIGH | MEDIUM | LOW | Total |
|---|---|---|---|---|---|
| GLW● | Corning Incorporated | 3 | 2 | 1 | 6 |
| CLS | Celestica, Inc. | 2 | 2 | 0 | 4 |
| APH | Amphenol Corporation | 2 | 1 | 1 | 4 |
| BELFB | Bel Fuse Inc. | 2 | 1 | 0 | 3 |
| BHE | Benchmark Electronics, Inc. | 2 | 0 | 0 | 2 |
| BELFA | Bel Fuse Inc. | 0 | 2 | 0 | 2 |
Concentration counts reflect items disclosed in each peer’s most recent 10-K; disclosed-size classification uses TrendMatrix’s internal 10-K extraction taxonomy.