CSX just printed its Q3 2026 scorecard and the headline reads cleaner than today's trading suggests. The stock is down about 2.5% in Friday's session, easing off a recent run, even as the railroad posted roughly US$4.0b in revenue and about US$0.57 in basic earnings per share. The real story sits in profitability. Management delivered an operating margin above 39% and highlighted sharply higher free cash flow for the year, which puts the immediate price slip at odds with the improvement in the underlying freight engine.
Love CSX's rich margins and rising free cash flow but wary of short term price swings around earnings season? Compare it against our list of solid balance sheet and fundamentals stocks (26 results) .
Q3 2026 Earnings Summary
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Revenue (Q3 2026 vs Q3 2025):US$4,017m vs. US$3,587m (up about 12%)
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Net Income (Excl. Extra Items, Q3 2026 vs Q3 2025):US$1,052m vs. US$694m (up about 52%)
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Basic EPS (Earnings Per Share, Q3 2026 vs Q3 2025):US$0.57 vs. US$0.37 (up about 53%)
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Operating Margin (Q3 2026 vs Q3 2025):39.1% vs. roughly 34.9% (up about 4.2 percentage points)
Management is already staffing up for 2027 volume growth. Ask Charlie what CSX's real 2027 growth bet is .
CSX Margins Put Productivity Bull Case To Work
The bullish story argues that CSX's earnings power depends on turning operational tweaks into structurally leaner costs and better asset use.
"Record fuel efficiency metrics, tighter control of vehicle fleets and a broad set of over 100 cost initiatives across PS&O, labor and energy use are aimed at structurally lower operating expense and support the company's target for operating margin expansion and EPS growth."
Q3 results give this claim real footing. Nonfuel expense declined while handling 5% higher volume, PS&O dropped about 10%, and operating margin reached 39.1%, up roughly 4.2 percentage points year on year. Management now guides to more than 350 basis points of full year margin expansion, so the cost program is not just theory; it is flowing through the income statement.
The price and this Narrative do not agree. → Uncover what this Narrative says CSX is actually worth .
CSX Bear Case: Costs, Capex And Volume Risks Tested
The skeptical view argues CSX is leaning too hard on cost cuts, heavy capex and a slow build in new freight to justify current enthusiasm.
"Heavy reliance on cost programs and more than 100 separate efficiency initiatives means any slowdown in execution or reversal of recent PS&O and labor savings could cap future margin gains and limit earnings progression once early wins are exhausted."
Q3 efficiency actually moved the other way. Nonfuel costs fell while handling 5% more volume and PS&O declined about 10%. Guidance still calls for operating margin expansion above 350 bps in 2026, so the feared stall in savings is not visible yet, even with capex held below US$2.4b.
Hunt For Mispriced Freight Cousins
CSX just showed how earnings strength and recent share moves can briefly separate. The real opportunity sits in finding stocks that could be undervalued before the market reassesses them.
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Company 1 - 35% below our estimate - use higher horsepower generation and long term data center contracts to reshape power systems exposure.
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Company 2 - 31% below our estimate - anchor critical digital infrastructure where data traffic is processed, interconnected, secured and managed across workloads.
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Company 3 - 50% below our estimate - shift toward larger recurring fee revenue as acquisitions broaden customer reach and deepen partnership driven product bundles.
That is three of the list. See every one of the 29 undervalued companies on it →
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.
Companies discussed in this article include CSX .
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