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Call sheet · Q4'26

Coherent (COHR)

Q4'26 earnings call · held August 12, 2026 · compared with the Q3'26 call · management-credibility review
7/12
Disclosure score
1 high, 2 medium, 1 low flags
Financial quality
Bottom line
The hidden engine is the 6‑inch indium‑phosphide capacity ramp - it underpins the margin boost and future volume, yet management provides no wafer counts or yield trends. The headline 34% YoY revenue surge looks strong, but the binding constraint remains indium‑phosphide supply, which could curb growth if the ramp stalls. Backlog extensions to calendar 28 improve visibility but lack disclosed volumes or pricing, making the claim more narrative than binder. My view hinges on whether the 6‑inch capacity can sustain commercial volumes into Q1 FY27; a shortfall would pressure both top‑line and margins.

The 30-second version

  • Sleeper story: 6‑inch indium‑phosphide ramp is the real margin engine
  • Headline re‑framed: revenue surge is supply‑limited
  • Red flag: metric drift and vague timelines

What changed this quarter

MetricQ3'26Q4'26Change
Revenue Q4 FY26$1.91 B - $2.05 B guidance range (Q3 guidance)$2.05 B actual record revenue (13% QoQ, 34% YoY)+13% QoQ, +34% YoY
Non‑GAAP Gross Margin Q4 FY2639.6% (Q3)40.2% (Q4)+0.6 pp QoQ
Capital Expenditures Q4 FY26$290 M (Q3)$556 M (Q4)+$266 M (+92%)
Backlog horizonOrders extend into calendar 27Orders now extend into calendar 28One‑year extension

Accountability tracked

2 new promises made2 narrative shifts flagged
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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