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Call sheet · Q1'26

Corning (GLW)

Q1'26 earnings call · held April 28, 2026 · compared with the Q4'25 call · management-credibility review
4/12
Disclosure score
2 high, 3 medium, 3 low flags
Financial quality
Bottom line
The sleeper story is GLW built a massive solar wafer facility on temporary power and water because they couldn't wait for utilities, and now they're eating a $30M extended shutdown to fix it, classic Corning overreach. Yes, they secured $18B in hyperscaler commitments, but Wendell admitted 'if we could make more, we could sell more,' meaning they're already capacity-constrained before the ink is dry. The binding constraint is operational execution, not demand; they have infinite demand but can't convert it efficiently, as evidenced by solar's pathetic $7M profit on $370M revenue. 'Our ramp is running behind our ambitious plans' might be the most honest thing Weeks has said in years. My view changes if Q3 solar margins hit 15%+ and FCF recovers above $500M, proving they can actually execute on this demand.

The 30-second version

  • Solar wafer disaster is the real story: $30M extended shutdown, permanent power still not installed, and they built a massive facility on TEMPORARY utilities
  • Three hyperscaler deals totaling ~$18B secured, but capacity expansions required across ALL optical operations
  • Display volume guidance quietly walked back while memory cost concerns suddenly appear

What changed this quarter

MetricQ4'25Q1'26Change
Revenue$4.41B (+14% YoY)$4.35B (+18% YoY)+400 bps YoY acceleration
EPS$0.72 (+26% YoY)$0.70 (+30% YoY)+400 bps YoY acceleration despite solar drag
Operating Margin20.2%20.2%Flat sequentially, +220 bps YoY
Free Cash Flow$732M (Q4)$188M-74% sequential decline
Optical Communications Revenue$1.7B (+24% YoY)$1.8B (+36% YoY)+1200 bps acceleration
Optical Net Income Margin18.0%21.5% (implied)+350 bps expansion
Glass Innovations Revenue$1.4B (combined Display + Specialty)$1.4B (+1% YoY)Growth stalled
Solar Revenue$526M (Hemlock/Emerging)$370M (+80% YoY)Strong growth but sequential decline
Solar Net Income$1M (Q4 Hemlock/Emerging)$7MStill barely profitable despite 80% revenue growth
Automotive Revenue$440M$437M (-1% YoY)Continued weakness

Accountability tracked

7 new promises made5 narrative shifts flagged6 prior promises scored
Inside the full report
The complete write-up covers the full promise ledger with kept/missed calls, disclosure-quality scoring, the metrics-vanished check, verification items, and the questions to ask next quarter.
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Scores, kept-promise rates, and flags on this site reflect the author's opinion, applying a stated methodology to statements management made on public earnings calls. Informational and educational purposes only - not investment advice, a recommendation, or an offer to buy or sell any security. Sources believed reliable but not guaranteed; the author may hold positions in the securities discussed.

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