Diodes (DIOD) just wrapped up FY 2025 with fourth quarter revenue of US$391.6 million and basic EPS of US$0.22, while trailing twelve month EPS sat at US$1.43 on revenue of about US$1.5 billion. Over the past few quarters, revenue has moved from US$332.1 million in Q1 2025 to US$366.2 million in Q2, US$392.2 million in Q3 and US$391.6 million in Q4, with EPS shifting from a loss of US$0.10 in Q1 to US$0.99 in Q2, US$0.31 in Q3 and US$0.22 in Q4. This leaves investors focused on how stable margins look in relation to the growth outlook.

See our full analysis for Diodes.

With the headline numbers set, the next step is to see how this earnings profile lines up with the key bull and bear stories that have been shaping expectations around Diodes.

Margins Improve With 4.5% TTM Profit

• Over the last twelve months, Diodes earned US$66.1 million of net income on US$1.5b of revenue, which works out to a 4.5% net profit margin compared with 3.4% a year earlier.
• Consensus narrative expects higher margin products to help over time, and the recent move from 3.4% to 4.5% net margin fits that story, yet:
  • Part of the 4.5% margin reflects a one off gain of US$35.5 million, so the improvement is not all from the core business.
  • Analysts still only see margins reaching about 8.4% in three years, which suggests the recent margin level may not fully represent the longer term earnings profile.

Five Year EPS Slide vs 50.2% Rebound

• Earnings have fallen on average 18.1% per year over the past five years, even though the last twelve months show a 50.2% earnings increase helped by that US$35.5 million one off gain.
• Bulls point to expanding demand in areas like automotive and AI as support for a sustained earnings recovery, but the mixed record keeps the bullish case under the microscope:
  • The latest trailing EPS is US$1.43, while quarterly EPS over FY 2025 ranged from a loss of US$0.10 in Q1 to US$0.99 in Q2 and US$0.22 in Q4. This range shows results can move around a lot from one period to the next.
  • Forecast revenue growth of roughly 15.8% per year is a positive data point for bulls, yet the long run earnings decline means investors may want to see several years of consistent results before treating the recent 50.2% jump as a firm trend.

Have a closer look at how bullish investors connect these growth drivers to their long term story for the stock 🐂 Diodes Bull Case.

P/E Premium And DCF Gap

• The stock trades on a trailing P/E of 78.3x, above the semiconductor industry average of 53.7x and the cited peer average of 62.4x, while the current share price of US$112.59 also sits well above a DCF fair value of US$19.31.
• Bears argue that the combination of a rich P/E and a DCF fair value far below the share price limits room for error, and the reported figures give that argument some support:
  • The last twelve months include that US$35.5 million one off gain, which lifts EPS and makes the 78.3x multiple look lower than it would be on a purely recurring earnings base.
  • Analysts referencing a price target of US$99.00 are still below the current US$112.59 share price, so anyone focused on valuation has multiple signals suggesting expectations are already quite high.

If you are weighing these valuation concerns, it is worth seeing how more cautious investors frame the downside risk in their detailed thesis 🐻 Diodes Bear Case.

Next Steps

To see how these results tie into long-term growth, risks, and valuation, check out the full range of community narratives for Diodes on Simply Wall St. Add the company to your watchlist or portfolio so you'll be alerted when the story evolves.

With sentiment in this article pulling in both bullish and cautious directions, it makes sense to check the data yourself and decide where you stand. To size up both sides of the story quickly, start with these 2 key rewards and 3 important warning signs

See What Else Is Out There

The mix of a rich 78.3x P/E, reliance on a US$35.5 million one off gain, and a history of EPS decline signals valuation and earnings quality risks.

If those concerns make you cautious about paying up for this stock, it is worth sizing up companies that look cheaper on fundamentals using the 51 high quality undervalued stocks.

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.