Celestica (CLS) Q2 2026 earnings review
Hyperscaler Demand Drives Unprecedented Acceleration
Celestica delivered an absolute blowout quarter, crushing its own guidance and raising the full-year outlook for the second time this year. Revenue surged 62% YoY to $4.70 billion, powered by an 84% explosion in the Connectivity & Cloud Solutions (CCS) segment. Operating leverage is shining through, with adjusted operating margins hitting a record 8.2% and Adjusted EPS skyrocketing 83% to $2.54. The most staggering data point isn't current results—it's the 2027 visibility. Management guided that 2027 revenue growth will accelerate beyond the 65% rate expected for 2026. This is a company riding the crest of the generational AI infrastructure wave.
🐂 Bull Case
Hyperscaler investment in 800G/1.6T networking switches and custom AI/ML compute is translating into direct, explosive growth for the CCS segment (+84% YoY). Visibility now extends deeply into 2027.
Record operating margins of 8.2% (up 80 bps YoY) demonstrate immense operating leverage. Celestica is capturing higher-value work, moving away from low-margin assembly to co-design.
🐻 Bear Case
While not explicitly stated in the Q2 PR, historical data shows a few hyperscalers drive the vast majority of growth. Any pause or digestion period in major cloud capex would halt Celestica's momentum violently.
The ATS segment grew just 8% YoY with a 6.3% margin. It remains a persistent drag on the company's overall profitability and growth rate.
⚖️ Verdict: 🟢🟢
Strongly Bullish. The financial trajectory is immaculate. Delivering 62% top-line growth at scale while expanding margins by 80 basis points is a rare combination. The upward revision to 2027 guidance seals the bull thesis.
Key Themes
Connectivity & Cloud Solutions (CCS) Hypergrowth
The CCS segment is the undisputed engine of Celestica. Revenue surged 84% YoY to $3.81 billion. This is driven by accelerating deployments of 800G Ethernet switches and custom AI/ML compute programs for hyperscalers. As 1.6T networking programs begin their ramp, this segment is positioned to maintain a staggering growth rate through 2027.
Hardware Platform Solutions (HPS) Sticky Value
HPS revenue reached ~$1.9 billion in Q2, jumping 58% YoY. By engaging in joint design and co-development with customers, Celestica elevates itself from a commoditized manufacturer to a strategic partner. This shift is the primary driver behind the consistent expansion in operating margins.
Relentless Operating Leverage
Celestica is dropping massive amounts of incremental revenue directly to the bottom line. Q2 adjusted operating margins hit 8.2% (vs 7.4% a year ago). The company has successfully held SG&A growth well below revenue growth, generating significant earnings power. Adjusted EPS outpaced revenue growth, soaring 83%.
The ATS Segment Anchor
While CCS flies, Advanced Technology Solutions (ATS) crawls. ATS revenue grew just 8% YoY to $0.89 billion. Segment margin improved to 6.3% (from 5.3%), but it remains heavily dilutive to the overall company margin of 8.2%. The ongoing portfolio reshaping in ATS is failing to match the hyperscaler momentum.
Heavy Capital and Working Capital Drain
A specific data point contradicting the flawless earnings narrative: H1 2026 Adjusted Net Earnings were $544.9M, but Free Cash Flow was only $285.0M. Celestica consumed $482.2M in CapEx and $1.2B in inventory builds over the last six months to fund this growth. If demand abruptly shifts, the company will be caught with massive physical and inventory overhead.
Macro: Supply Chain Constraints & Concentration Risk
Management's ability to achieve >65% growth in 2027 heavily depends on securing custom silicon, memory, and high-layer count PCBs. Prior quarters highlighted tightening supply chains. Furthermore, Celestica’s revenue is dangerously concentrated among a few cloud giants; any macro-driven capex reduction by these customers represents an existential threat to the stock's current multiple.
Other KPIs
Accelerating dramatically. Adjusted ROIC expanded 2,000 basis points YoY from 35.5% in Q2 2025. This metric is crucial: it proves Celestica is generating massive, efficient returns on its rapidly expanding asset base and $1B+ annual CapEx budget.
Inventory levels surged by $1.21 billion in the first six months of 2026. While necessary to support the 65%+ revenue growth guided for the year and secure long lead-time components (like 1.6T silicon), it creates substantial balance sheet risk if customer deployments are delayed.
Guidance
Accelerating. The midpoint of $5.40B implies an astonishing ~69% YoY growth rate (compared to $3.19B in Q3 2025). This shows momentum is building sequentially (+15% vs Q2 2026) as 800G switches and AI/ML compute programs scale.
Accelerating. Raised significantly from the prior outlook of $19.0 billion. This implies 65% YoY growth for the full year, up from previous expectations, underscoring intense confidence in H2 customer forecasts.
Accelerating. Raised from the prior $10.15 outlook. This implies massive 87% YoY earnings growth, proving that incremental AI networking revenue carries outsized margin profiles.
Accelerating. Management explicitly stated that 2027 revenue growth will accelerate *beyond* the 65% rate expected for 2026. This is the most critical forward-looking data point, suggesting visibility into hyperscaler deployment roadmaps well into late 2027 and 2028.
Key Questions
Margin Ceiling
Adjusted operating margins reached 8.2% this quarter, yet Q3 guidance implies 8.4%. Given the drag from ATS and the hardware nature of the business, where is the structural ceiling for operating margins?
2027 Growth Underpinnings
You guided 2027 growth to accelerate beyond 2026's 65% rate. How much of this is backed by non-cancellable, non-returnable (NCNR) orders versus highly probable customer forecasts?
Data Center Bottlenecks
With the massive scale of your upcoming 1.6T and AI/ML compute shipments, are you seeing any indications from hyperscalers that power or thermal constraints at the data center level could push out delivery timelines?