Coherent (COHR) Q4 2026 earnings review
Explosive AI Demand Powers Record Results, Masking Industrial Weakness
Coherent delivered an exceptional Q4, driven entirely by the AI datacenter boom. Revenue surged 34% YoY to $2.05B, while Non-GAAP EPS skyrocketed 74% YoY to $1.74, crushing expectations. Operational leverage is shining through, with Non-GAAP gross margins expanding 215 bps YoY to 40.2%. The AI supercycle continues to accelerate, prompting a blowout Q1 FY27 guidance of $2.2B-$2.4B in revenue. However, beneath the headline beats, a deep divergence exists: the Datacenter & Communications segment is accelerating rapidly, while the Industrial segment is steadily decelerating, down 16% YoY.
🐂 Bull Case
The ramp of 800G and 1.6T transceivers is accelerating faster than expected. Q1 FY27 guidance suggests top-line YoY growth will jump to ~45% (midpoint), up from 34% this quarter.
The successful transition to 6-inch Indium Phosphide (InP) wafers is significantly reducing unit costs. This structural advantage drove Non-GAAP gross margin up to 40.2%, marching steadily toward management's >42% target.
🐻 Bear Case
The Industrial segment is reversing, dropping from $511M to $431M YoY. Continued macro weakness in semi-cap and automotive markets acts as a persistent drag on consolidated growth.
Coherent's growth thesis relies heavily on aggressively doubling InP capacity and scaling new facilities. Any supply chain hiccups or yield issues could instantly throttle revenue growth.
⚖️ Verdict: 🟢🟢
Strong Bullish. The sheer velocity of AI-driven datacenter demand is overpowering the weakness in the Industrial segment. With robust pricing power, scaling 6-inch wafer margins, and massive forward guidance, Coherent's execution is firing on all critical cylinders.
Key Themes
Transceiver Supercycle Accelerating
The core growth engine remains the insatiable demand for high-speed datacom infrastructure. Driven by scale-out AI clusters, 800G shipments are surging, while 1.6T transceivers are ramping faster than historically anticipated. This demand fueled a 59% YoY explosion in Datacenter & Communications revenue to $1.61B.
6-inch Indium Phosphide (InP) Structural Moat
The rapid internal transition from 3-inch to 6-inch InP wafer production is Coherent's primary margin lever. The 6-inch platform produces over 4x the devices at less than half the cost per wafer, and yields are already exceeding legacy lines. This transition is actively expanding gross margins and provides a critical supply advantage in a capacity-constrained industry.
New High-Value Optical and Thermal Tech
Coherent is actively commercializing multiple adjacent product vectors. Optical Circuit Switches (OCS), Liquid-crystal technology, Co-Packaged Optics (CPO), and advanced data center cooling materials (Thermodite) significantly expand the TAM. A recent $50M CHIPS Act Letter of Intent and a massive NVIDIA supply agreement strongly validate this pipeline.
Industrial Segment Macro Weakness
The bullish AI narrative contradicts the reality of the Industrial segment, which is steadily reversing. Q4 Industrial revenue fell 16% YoY and 3% sequentially to $430.5M. The macro environment, characterized by sluggish semiconductor capital equipment and automotive markets, is pulling down the company's otherwise meteoric total growth rate.
CapEx Burden and Cash Conversion Latency
Meeting the extraordinary datacenter demand requires immense capital expenditures. Building out 6-inch fabs in Texas, Sweden, and Zurich, alongside module assembly in Asia, represents an enormous cash burn. There is a multi-month latency between wafer production and revenue recognition, heightening the financial stakes if demand normalizes.
Geopolitical and Tariff Vulnerabilities
While unmentioned in the Q4 press release, prior quarters highlighted the persistent threat of tariffs, global trade protection measures, and intense competition from rapidly expanding Chinese optical networking peers. Despite a strong U.S. manufacturing footprint, a volatile global trade environment remains an exogenous risk to global transceiver supply chains.
Other KPIs
Accelerating sequentially and YoY. Up from 38.1% in 25Q4 and 39.6% in 26Q3. This proves the company is successfully optimizing pricing and harvesting the structural cost benefits of its 6-inch InP manufacturing ramp, steadily approaching management's long-term goal of >42%.
Up 22.7% YoY, but growing slower than revenue (33.8% YoY), demonstrating operating leverage. SG&A expenses specifically fell to 8.2% of revenue on a Non-GAAP basis (down from 10.3% a year ago), showcasing the benefits of recent portfolio optimization and site consolidation.
A massive reversal from the nominal $6M reported in Q4 FY25. Operating margin surged to 12.4% on a GAAP basis, proving the company's ability to drop top-line datacenter growth directly to the bottom line.
Guidance
Accelerating. The $2.3B midpoint implies an astonishing 45% YoY growth rate, a stark acceleration from Q4's 34% YoY growth. This signals that supply constraints are easing while customer deployments for 800G/1.6T networking remain insatiable.
Accelerating. The $1.95 midpoint implies roughly 68% YoY growth over Q1 FY26 ($1.16). While the percentage growth rate looks slightly lower than Q4's 74% YoY print due to tougher base effects, the absolute sequential jump of $0.21 confirms immense profitability momentum.
Stable to Accelerating. The 40.5% midpoint represents further sequential expansion from 40.2% in Q4, maintaining the trajectory toward the >42% target driven by 6-inch wafer adoption.
Key Questions
Industrial Segment Bottom
With the Industrial segment revenue down 16% YoY and contracting sequentially, what leading indicators (if any) are you seeing in semiconductor capital equipment that suggest a bottom is near?
1.6T Transceiver Margins vs Output
As 1.6T transceiver adoption accelerates faster than historical transitions, how are early-cycle production yields impacting the gross margin profile compared to the now-mature 800G portfolio?
CPO Commercialization Timeline
Following the major NVIDIA partnership and investments, can you provide a more granular timeline on when Co-Packaged Optics (CPO) solutions will transition from sampling to meaningful top-line contributions?