Celestica Stock’s Upside Rests On What Drops Through To Profit

Celestica’s earnings outlook is climbing faster than its revenue outlook, and the operating leverage behind that gap, built on design-led, higher-value work, is what could carry the stock higher.

Celestica (CLS) has returned about 80% over the trailing twelve months and still trades roughly 23% below its 52-week high, at about $41.7 billion of market capitalization. It has gained more than 30% in under two months on 13 separate occasions since 2010, so a move of that size has precedent. What is less obvious is where the next one comes from, and it is not the revenue growth already in the guidance. It is how much of that revenue drops through to profit, and the design work that decides it.

The Switch Work Celestica Designs Rather Than Just Builds

Celestica’s HPS business, where its own engineering sits inside the product instead of around it, generated $1.9 billion of the company’s $4.7 billion of second-quarter 2026 revenue and grew 58%, faster than the company’s own Q2 growth rate, carried by ramping 800G switch programs across multiple hyperscaler customers. Management is blunt about why that matters: the vast majority of switching programs are HPS, and that design content is reflected in price.

Ten active 1.6T programs sit behind them, with mass production starting at two hyperscaler customers in the third quarter of 2026, and the custom racks for OpenAI and the AMD scale-up platform are the same design-led work, each sized by management as a several-billion-dollar 2027 opportunity. The design engineering organization is set to reach close to 2,000 engineers by the end of 2026, up from about 1,350 in April 2026.

Why The Earnings Outlook Is Climbing Faster Than The Revenue Outlook

That mix is why the guidance keeps moving. Celestica raised its 2026 outlook at each of the last two quarterly reports, most recently to $20.5 billion of revenue and $11.30 of adjusted EPS, which the company puts at 65% revenue growth and 87% adjusted EPS growth. That gap is the opportunity, and the mechanism is operating leverage: adjusted operating margin hit 8.2% in the second quarter of 2026, a company record; the third quarter of 2026 is guided to 8.4%, and the full-year adjusted operating margin outlook was lifted to 8.4%. Converting revenue growth into faster profit growth is the trait that defines the quality businesses the Trefis High Quality Portfolio holds. Management expects adjusted EPS to grow faster than revenue again in 2027. That leverage comes with a share-count caveat: in early August, the company priced an equity offering of 9,677,419 common shares at $310 each, for $3 billion in gross proceeds.

The Line That Decides Whether The Leverage Holds

Gross margin is where the doubt sits, not operating margin. Adjusted gross margin was 11.5% in the second quarter of 2026, down 20 basis points year over year on segment mix, and while the CFO expects gross margin to hold around the mid-11s through 2026, he has said non-HPS work is not as margin-rich as HPS product and that the 2027 mix impact is still being worked through.

The second limit is physical: management says materials rather than demand are the constraint, and demand already exceeds the revenue figures the company has been sharing. So the upside case is real but conditional, and what to watch is whether the guidance keeps climbing while gross margin holds. The options market is not treating that as settled either, pricing implied volatility in the 80th percentile of its trailing one-year range.

A Design Edge Is Still One Company’s Edge

The leverage here is real, and Celestica’s own numbers show it, but it rides on one mix in one cycle. The Trefis High Quality Portfolio applies that same demand for quality earnings across many businesses, so no single ramp decides the outcome. That portfolio has a track record of outpacing the three major indices – the S&P 500, S&P Mid-cap, and Russell 2000.