Celestica (CLS) Stock Forecast: What Could Drive It in 2026
Short answer
What is actually driving Celestica (CLS) right now is Hyperscaler-driven CCS growth: The Connectivity & Cloud Solutions segment is the engine of the story, reaching roughly ~$3.24 billion in Q1 2026 and growing about ~76% year over year. Q1 2026 revenue is ~$4.05B (up ~53% YoY). If that keeps playing out, the setup is favourable; the risk to it is customer concentration is the headline risk: as of Q1 2026 three customers each represented at least 10% of revenue (roughly 35%, 15%, and 15%), and the top ten customers made up about ~78% of revenue, so losing or being de-prioritized by a single hyperscaler would matter a lot. No one can predict where CLS trades, and Walnut does not publish targets, so treat this as a scenario, not a price target or prediction.
What could drive Celestica (CLS) higher?
Hyperscaler-driven CCS growth
The Connectivity & Cloud Solutions segment is the engine of the story, reaching roughly ~$3.24 billion in Q1 2026 and growing about ~76% year over year. Management guided to roughly ~70% CCS revenue growth for full-year 2026, driven by data-center demand from a concentrated hyperscaler customer base. This is what shifted Celestica from a traditional contract manufacturer into an AI-infrastructure name in investors' eyes.
AI networking and compute content
Growth is concentrated in specific high-demand products: 800G networking switches ramping across hyperscaler customers, and next-generation AI/ML compute programs. In Q1 2026 the communications end market grew about ~69% and the enterprise end market about ~101%, the latter tied to a planned hyperscaler AI/ML compute ramp. As AI clusters scale, the dollar content of networking and custom compute hardware per build has been rising.
Margin expansion and mix
EMS has historically been a thin-margin business, but Celestica's adjusted operating margin reached about ~8.0% in Q1 2026, up roughly 90 basis points year over year, with full-year 2026 guidance around ~8.1%. The improvement reflects scale and a richer mix toward higher-value design and CCS work rather than commodity assembly. Whether margins hold or expand further is a key part of the valuation debate.
Design and JDM differentiation
Celestica increasingly competes on joint-design-manufacturing (JDM) and engineering, not just assembly, which helped it take a leading slice of the high-speed Ethernet switch market versus EMS rivals. Deeper design involvement tends to carry better margins and stickier customer relationships. This is the lever the company points to for sustaining differentiation if pure-volume competition intensifies.
What could weigh on CLS?
Customer concentration is the headline risk: as of Q1 2026 three customers each represented at least 10% of revenue (roughly 35%, 15%, and 15%), and the top ten customers made up about ~78% of revenue, so losing or being de-prioritized by a single hyperscaler would matter a lot. EMS has historically run thin margins, leaving limited cushion if pricing or volumes compress. The business is tied to AI capital spending, which is cyclical and could slow or pause after a heavy buildout phase. And the stock has re-rated to a much higher multiple than its EMS history, so it carries both competition from Jabil, Flex, Foxconn, and ODMs and the risk that high growth expectations are not met.
How to think about a CLS forecast
Rather than chasing a price target, it tends to help to weigh the drivers above against the risks, decide how long you are willing to hold, and size the position so a wrong call is survivable. A “forecast” is really a probability-weighted view of those drivers playing out, not a number.
For the full picture, see the CLS guide and whether CLS is a buy. In Walnut you can pressure-test the thesis against your real portfolio.
The bottom line on the CLS outlook
The bottom line: what is driving Celestica (CLS) is Hyperscaler-driven CCS growth, with q1 2026 revenue at ~$4.05B (up ~53% YoY). If that keeps playing out the setup is favourable; the risk is customer concentration is the headline risk: as of Q1 2026 three customers each represented at least 10% of revenue (roughly 35%, 15%, and 15%), and the top ten customers made up about ~78% of revenue, so losing or being de-prioritized by a single hyperscaler would matter a lot. No one can predict the price, so treat any CLS forecast as a scenario, not a target or prediction, and decide from your own thesis and time horizon. Walnut is not an investment adviser.
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FAQ
What is the forecast for Celestica (CLS)?
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No one can reliably predict where CLS will trade, and Walnut does not publish price targets. What is more useful is the setup: the drivers that could push Celestica higher and the risks that could weigh on it. This page lays out both so you can form your own view. Not a recommendation.
What could drive CLS higher?
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The main growth drivers are Hyperscaler-driven CCS growth; AI networking and compute content; Margin expansion and mix. Whether they play out is the real question, not a guaranteed path.
What are the risks to CLS?
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Customer concentration is the headline risk: as of Q1 2026 three customers each represented at least 10% of revenue (roughly 35%, 15%, and 15%), and the top ten customers made up about ~78% of revenue, so losing or being de-prioritized by a single hyperscaler would matter a lot. EMS has historically run thin margins, leaving limited cushion if pricing or volumes compress. The business is tied to AI capital spending, which is cyclical and could slow or pause after a heavy buildout phase. And the stock has re-rated to a much higher multiple than its EMS history, so it carries both competition from Jabil, Flex, Foxconn, and ODMs and the risk that high growth expectations are not met.
Will CLS stock go up in 2026?
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Nobody knows, and anyone who says they do is guessing. Celestica's direction depends on whether the drivers above outweigh the risks, plus the broader market. Focus on the thesis and your time horizon rather than a single-year call.
Is CLS a buy?
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That depends on your thesis, time horizon, and what you already own, not on a forecast. See the CLS "is it a buy?" page for a framework. Walnut is not an investment adviser.
Walnut is informational, not investment advice. This page describes drivers and risks; it is not a price forecast, target, or recommendation. Markets are uncertain and past performance does not predict future results.