Fabrinet stock took a sharp hit today, dropping about 6% to roughly US$455, even as the quarter delivered headline growth that many hardware manufacturers would envy. Revenue reached about US$1.32b for Q4 and non GAAP earnings per share landed near US$4.10, both comfortably ahead of guidance.

The real flashpoint is sentiment around how much of that strength is already priced in after a powerful run over the past year and a trailing P/E in the mid 30s. The market is treating a strong print as an excuse to cool enthusiasm rather than triggering a fresh buying rush.

Is Fabrinet now priced for perfection at a mid 30s P/E, or is the market overreacting to a single quarter and stretching beyond the stock’s estimated fair value range? See how the current share price compares with detailed cash flow based fair value work in the valuation analysis for Fabrinet

Q4 2026 Earnings Summary

• Revenue, Q4 2026 vs. Q4 2025: US$1,315.8m vs. US$909.7m (up about 45%)
• Net Income, Q4 2026 vs. Q4 2025: US$139.3m vs. US$87.2m (up about 60%)
• Basic EPS, Q4 2026 vs. Q4 2025: US$3.89 vs. US$2.44 (up about 60%)
• Net Profit Margin, Trailing 12 Months vs. Prior Year: 10.2% vs. 9.7% (slight margin improvement)

Prefer clear visuals instead of another wall of earnings tables and raw figures? See Fabrinet’s full financial picture with an at a glance valuation breakdown in the interactive company report for Fabrinet.

Fabrinet bull story: AI optics thesis on trial

Bulls argue Fabrinet is becoming a central manufacturing partner for AI driven data centers, with higher value optics and HPC work lifting growth and margins. Q4 results give that story real backing. Data Center revenue reached US$669m and about 51% of total sales, with management pointing to DCI, high speed transceivers and HPC as key drivers. Non GAAP operating margin of 10.9% is the highest in three years, and full year non GAAP EPS rose to US$14.09. That supports the idea that mix is tilting toward richer programs while OpEx stays tight at about 1.3% of revenue. Capacity projects in Thailand and Santa Clara, plus the Raytek packaging tie up and early CPO and NPO work, show Fabrinet investing behind that AI optics pipeline rather than relying on one off demand.

Bear view: Fabrinet concentration and cash flow concerns

Bears worry that Fabrinet’s growth rests on a narrow AI customer set, that big ramps pressure margins, and that cash returns might lag headline earnings. Q4 and FY26 numbers do validate parts of that. Four customers each generated more than 10% of revenue, with Cisco at 20% and NVIDIA and Amazon both at 11%. Free cash flow for FY26 was only about US$4m despite US$4.6b of revenue, and Q4 free cash flow was an outflow of US$37m as capex on Building 10 and new sites stepped up. Gross margin in Q4 was 12.2% and slipped slightly year on year, which fits the concern that large program ramps can cap margin expansion even as volume surges. The share price drop of about 6% after earnings suggests the market is still sensitive to those risks.

Compare Fabrinet’s strong AI optics progress and heavy capex with the sharp 5.8% share price drop after earnings, then see whether Wall Street thinks the stock has run ahead of itself by checking the consensus price target analysis for Fabrinet.

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This article by Simply Wall St is general in nature. We provide commentary based on historical data and analyst forecasts only using an unbiased methodology and our articles are not intended to be financial advice. It does not constitute a recommendation to buy or sell any stock, and does not take account of your objectives, or your financial situation. We aim to bring you long-term focused analysis driven by fundamental data. Note that our analysis may not factor in the latest price-sensitive company announcements or qualitative material. Simply Wall St has no position in any stocks mentioned.