Coherent, Inc.

COHR · NYSE · USD

Can Coherent turn an exceptionally strong AI data center order book into shipped revenue fast enough, and at high enough margins, to earn a return on the capacity it is building?

Last 4 earnings calls · through Q4 FY2026

Bull case

  • Capacity ramp sets growth

    The bull case is that demand exceeds what Coherent can build, so revenue growth depends mainly on how fast indium phosphide capacity comes online.

  • New optical platforms

    Optical circuit switching and co-packaged optics add new sales layers on top of transceivers, widening the company's share of optical content in AI networks.

  • Margins and balance sheet

    Cheaper six-inch wafer production plus a much smaller debt load should let earnings grow faster than sales, which is the core of the profitability case.

Bear case

  • AI customer concentration

    The bear case is that a handful of AI data center buyers drive most of the growth, so any pause in their network spending would hit revenue quickly.

  • Cash tied up in capacity

    Capital spending has outrun cash generation, so the payback on new factories depends on demand holding up long enough to fill the added capacity.

  • Pricing fixed in contracts

    Long-term supply agreements fix prices for years, which limits how much Coherent can earn if shortages persist or if its own costs move against it.

  • Industrial demand still soft

    The industrial laser and materials business remains weak, leaving the company more reliant on one end market than its broad product range would suggest.

Bull and bear points

Growth & Execution

In short: Order backlog is very long, while revenue depends on how fast indium phosphide capacity ramps.

Bull · 2

  • Indium phosphide ramp pulled forward

    Management first framed the capacity doubling as a twelve-month goal and now expects to hit it a quarter early, then more than double again by the end of calendar 2027, lifting the main limit on shipments.

    Tone shiftQ1 FY2026 → Q3 FY2026

  • Management adds a $3 billion quarter goal

    A year ago management described only strong sequential growth for the fiscal year; it now commits to a single quarter above $3 billion of revenue by the end of fiscal 2027, a far more specific target.

    Tone shiftQ1 FY2026 → Q4 FY2026
Bear · 2

  • Laser supply remains the constraint

    Management says indium phosphide output, not customer orders, sets the pace, and lasers made in one quarter reach transceiver shipments roughly two quarters later, so bookings convert on the factory's schedule.

    Q4 FY2026 call

  • New platforms contribute from 2027

    Optical circuit switching is ramping now, but multi-rail systems and thermal products only begin shipping in calendar 2027, leaving near-term growth resting on transceivers and a first co-packaged optics order.

    Q4 FY2026 call

Profitability & Financial Strength

In short: Gross margin is rising on cheaper six-inch wafers, but heavy capital spending keeps free cash flow negative.

Bull · 2

  • Six-inch wafers cut laser cost per chip

    Gross margin reached 38.5% in Q4 fiscal 2026, up 2.8 points, as six-inch wafers yield more than four times as many devices at less than half the cost of three-inch lines.

    Q3 FY2026 call

  • Debt reduced and cash raised

    Net debt fell to $1.2 billion from $2.8 billion a year earlier, lowering interest costs and giving Coherent room to fund its capacity build from its own balance sheet rather than new borrowing.

    Filed financials
Bear · 2

  • Capital spending outruns cash generation

    Free cash flow was negative $1.0 billion over the last twelve months, and management guides capital spending higher again, so the capacity build absorbs cash rather than producing it until the new lines fill.

    Filed financials

  • Reported margin trails adjusted figures

    Operating margin on a reported basis was 15.6% in Q4 fiscal 2026, well below the adjusted margin management highlights, so a large share of stated profit depends on add-backs for amortization and stock pay.

    Filed financials

Market Position

In short: Coherent supplies key optical parts to the largest AI buyers, which brings volume and customer concentration.

Bull · 2

  • Optical switch market estimate doubled

    Management sized optical circuit switching at over $2 billion a year ago and now puts the opportunity above $4 billion as customers use it in more parts of the network, with revenue growing each quarter.

    Tone shiftQ1 FY2026 → Q3 FY2026

  • NVIDIA agreement runs through the decade

    The partnership pairs a $2 billion equity investment with a multiyear supply agreement covering several co-packaged optics products, tying Coherent's newest laser capacity to a lead customer's roadmap.

    Q3 FY2026 call
Bear · 2

  • Industrial recovery keeps slipping later

    Management expected semiconductor equipment orders to lift industrial revenue from the June quarter onward; the segment instead came in flat, with broader industrial markets still described as weak.

    Tone shiftQ2 FY2026 → Q4 FY2026

  • Two customers exceed a tenth of revenue

    Dependence on a few AI buyers means a change in their ordering patterns, or their decision to qualify a second supplier, would be felt across the largest and fastest growing part of the business.

    10-K, filed 2026-08-14