Celestica's Margin Expansion Faces Sustainability Test Amid High Valuation and AI Dependency

What happened

A recent article highlights Celestica's focus on margin expansion through a structural shift to high-value, engineering-intensive offerings, with sustained profitability improvements. This aligns with the DeepValue report's data showing record non-GAAP operating margins of 7.6% in Q3 2025, driven by AI-driven growth in Connectivity & Cloud Solutions, particularly Hardware Platform Solutions revenue up 79% year-over-year. However, the report critically notes that this margin expansion is precarious, supported by a shallow moat and heavy dependence on hyperscaler AI capex, with three customers representing 59% of Q3 2025 revenue and contracts lacking minimum volumes or fixed pricing. The stock trades at ~52x 2024 EPS, embedding aggressive 2025-26 growth targets that the report deems unsustainable beyond 2026 due to rising competition and potential hyperscaler capex moderation. Thus, while Celestica exhibits near-term momentum, the DeepValue report emphasizes that current valuations ignore significant downside risks from customer concentration and cyclical exposure.

Implication

Celestica's elevated valuation at ~52x 2024 EPS and ~50x EV/EBITDA leaves little margin of safety, making the stock vulnerable to earnings and multiple compression if AI capex moderates. The company's heavy reliance on a few hyperscaler customers, with no contractual guarantees, amplifies risk, as any program loss or pricing reset could rapidly erode margins from current record levels. Monitoring hyperscaler 2027 capex guidance and Celestica's ability to meet 2026 targets of $16.0B revenue and $8.20 EPS is crucial, with early warnings including CCS margin declines or growth deceleration relative to market rates. In a base scenario, intrinsic value is estimated near $260, implying negative expected returns from the current price of $313.60, while a bear case at $190 could materialize if margins revert to historical levels. Therefore, disciplined investors are advised to trim exposure or wait for a pullback below $240 or clearer evidence of durable post-2026 economics before considering new positions.

Thesis delta

The news article's optimistic portrayal of margin expansion does not shift the DeepValue report's bearish thesis; instead, it reinforces the report's warning that such improvements are cyclical and embedded in an overvalued stock. The report already anticipates this narrative and underscores that margins are likely to face pressure as hyperscaler bargaining power increases and competition from peers like Flex and Arista intensifies. Thus, no material change in investment stance is warranted, maintaining the 'POTENTIAL SELL' rating with conviction on downside risks.