Key takeaways
- Semiconductor demand keeps growing: The global push toward AI infrastructure, cloud computing, and advanced electronics is creating massive demand for the companies that design and manufacture the hardware powering these trends, and Canada has real exposure to this theme.
- Celestica is a legitimate player: Celestica has transformed itself from a traditional contract manufacturer into a company with serious exposure to high-growth end markets like hyperscaler data centers, and its financial results have reflected that shift in a big way over the past couple of years.
- Valuation and concentration risk matter: When a stock runs as hard as Celestica has, you need to pay close attention to how much of the growth is already priced in and how reliant the business is on a handful of major customers, because losing even one contract can change the story fast.
Canada doesn’t have a deep bench of semiconductor stocks. That’s just the reality. The TSX isn’t home to the fabs, the chip designers, or the GPU makers that dominate headlines south of the border. If you want broad exposure to the semiconductor supply chain, you’re probably looking at semiconductor ETFs or individual U.S. names. What Canada does have is a company that has quietly become one of the most important players in the hardware infrastructure buildout powering AI, cloud computing, and next-gen networking.
Celestica has been one of the best-performing stocks on the TSX over the past two years. Full stop. The company’s pivot toward higher-margin, AI-related hardware manufacturing has completely changed its financial profile, and the market has rewarded it accordingly. Revenue growth has been strong, margins have expanded, and the stock has compounded at a pace that’s beaten most U.S. tech stocks over the same period.
So why am I covering it here under semiconductors? Because Celestica sits at the heart of the semiconductor value chain without actually designing chips. It builds the servers, networking switches, and hardware platforms that companies need to deploy those chips at scale. Think of it as the picks-and-shovels play for the AI infrastructure boom. Every hyperscaler ordering custom silicon still needs someone to assemble, test, and ship the systems those chips go into.
The risk, of course, is concentration. A huge chunk of Celestica’s recent growth ties back to a small number of hyperscale customers. If AI spending slows or shifts, the stock won’t be immune. Valuation has also gotten stretched after the run. That’s the tension I wanted to dig into.
For Canadian investors who want exposure to the semiconductor theme without buying purely U.S. names, Celestica is essentially the only serious option on the TSX. Whether it’s still attractive at these levels is the real question. I looked at the fundamentals, the growth drivers, and where the valuation sits relative to what’s actually being delivered.
In This Article
- Celestica Inc. (CLS.TO)
Celestica Inc. (TSX: CLS)
Celestica Inc. is a Canadian-based multinational electronics manufacturing services provider that delivers design, engineering, and manufacturing solutions to various high-technology industries...
Competitive Edge
- Celestica is one of only a handful of EMS providers qualified to build high-complexity AI networking switches and GPU server racks for hyperscalers like Meta, Google, and Microsoft. This qualification barrier takes years to replicate, creating a durable competitive position.
- The shift from traditional telecom hardware to AI/ML infrastructure positions Celestica on the right side of the largest capex cycle in tech history. Hyperscaler capex budgets are growing 40-60% annually, and Celestica captures manufacturing share as designs get more complex.
- Unlike pure-play ODMs in Taiwan (Quanta, Wistron), Celestica offers North American manufacturing with ITAR compliance for defense and proximity to hyperscaler design teams. This geographic advantage becomes more valuable as supply chain reshoring accelerates.
- ATS segment provides diversification into aerospace, defense, and industrial end markets with longer product lifecycles and stickier customer relationships. The 17.3% income growth in FY2025 despite flat revenue shows margin discipline in the non-hype part of the business.
By the Numbers
- ROIC of 36.5% with debt-to-equity of only 0.36 means the exceptional returns are driven by operating efficiency, not financial engineering. Net debt/EBITDA at 0.27x means the balance sheet is nearly clean while generating top-decile returns on capital.
- CCS segment income grew 58.4% YoY on 41.6% revenue growth, meaning incremental margins are expanding. CCS segment margin improved from ~7.4% in FY2024 to ~8.2% in FY2025, showing operating leverage as AI/networking volumes scale.
- Communications revenue surged 80.6% YoY to $7.1B, accelerating from 47.5% the prior year. This single segment now represents 57% of total revenue vs. 34% two years ago, a complete transformation of the business mix toward hyperscaler AI infrastructure.
- EPS 3Y CAGR of 59.5% vs. revenue 3Y CAGR of 20.1% shows massive operating leverage. SG&A at just 1.9% of revenue and R&D at 1.0% means the cost structure is extremely lean, so incremental revenue drops almost entirely to the bottom line.
- SBC at 0.54% of revenue ($74M) against $98M in buybacks means share repurchases exceed dilution by 32%. Shares outstanding declined 0.26% YoY, confirming buybacks are genuinely accretive rather than just offsetting option grants.
Risk Factors
- FCF-to-net-income conversion of just 51.3% is a red flag for earnings quality. Capex-to-depreciation of 2.2x confirms the company is investing heavily ahead of revenue, but capex-to-OCF at 44.5% means nearly half of operating cash flow is consumed before shareholders see a dollar.
- P/FCF of 84x with FCF yield of only 1.2% prices in flawless execution for years. Even on forward estimates showing revenue nearly tripling to $33.5B by Y3, the EV/Sales of 3.0x is rich for an EMS business with 12% gross margins.
- Enterprise revenue declined 18.9% YoY in FY2025 after three consecutive years of 30%+ growth. This segment's sudden reversal suggests potential customer concentration risk or order timing volatility that the Communications surge is masking.
- Quick ratio of 0.70 is below 1.0, meaning current assets excluding inventory don't cover current liabilities. With DIO at 73 days and a cash ratio of just 0.07, the company is running with minimal liquidity buffer relative to its $12.4B revenue base.
- FCF conversion trend is flagged at -1 (deteriorating). Despite 40.5% FCF growth YoY, the FCF margin of 3.6% vs. net margin of 7.0% shows working capital and capex are absorbing an increasing share of profits as the business scales rapidly.
I keep coming back to one question with Celestica. Is this a structural shift in the business, or is it a cycle that happens to look structural because we’re still in the middle of it? I genuinely don’t know. And I think anyone who tells you they’re certain is selling something.
The execution has been undeniable. That’s not the debate. The debate is whether the next two years look anything like the last two, and that depends almost entirely on decisions being made inside a handful of hyperscale data center budgets that nobody outside those companies has real visibility into. That’s a concentration risk that no amount of margin expansion fully offsets.
For Canadian investors, though, this is what you’ve got. One name. One bet on the semiconductor infrastructure theme without crossing the border. That scarcity has probably added a premium to the stock, and it also means there’s no easy way to diversify within the sector on the TSX. You’re either in or you’re out. I’d rather own it at a price where I’m being compensated for that binary setup than chase it after another leg higher just because the AI narrative still sounds good.
