Thales or Vinci: which French stock to buy in 2026?

2026-07-16 · By Lubin Danilo, founder of Lubin Investment

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Thales (defense and aerospace) and Vinci (infrastructure concessions) both score 9 out of 12 or higher in my quality filter, but for different reasons: Thales's record order backlog fueled by European rearmament, and the decades of guaranteed cash flow from Vinci's concessions. Yet their valuations tell two opposite stories.

Two French blue chips, two opposite business models

Thales and Vinci share three things: both are historic French companies, both are heavyweights of the CAC 40 index, and both rank among the highest scored in my quality filter, which judges 12 objective financial criteria (profitability, growth, margins, debt, return on invested capital). Beyond that, everything sets them apart. Thales designs and builds electronic defense, aerospace, and cybersecurity systems: radars, missiles, satellites, military communication systems. Vinci builds and operates infrastructure over very long time horizons: highways, airports, and a construction and energy division (VINCI Construction, VINCI Energies).

The table below summarizes where each company stands on my key criteria, based on live data as of mid-July 2026.

Thales: Europe's rearmament in a record order backlog

Thales has never had this much visibility on future revenue. At the end of 2025, its order backlog reached a record 53.3 billion euros, the equivalent of more than two years of revenue already secured before selling anything new. In the first quarter of 2026, new orders kept flowing in: 4.65 billion euros, up 23% as reported and 27% organically. Recent contracts include the SAMP/T NG air defense system for Denmark and an air surveillance contract for Qatar.

This order backlog is not a cyclical accident: it reflects a long term political decision. Multi-year military spending laws passed in France, Germany, and Poland commit these states to defense spending paths extending through 2030 and beyond. Thales, Europe's leading defense electronics supplier, is directly exposed to this structural increase. The company is investing accordingly: between 830 and 850 million euros planned for 2026, 40% more than in 2024, to multiply its production capacity (120mm munitions production has quadrupled since 2023 at its Ferté-Saint-Aubin site, and short range radar production is set to increase fivefold in Germany by the end of 2026).

Vinci: a temporary soft patch on assets that last decades

Vinci's news flow looks more mixed. In April 2026, traffic on its highway network fell 5.0%, and its airport traffic fell 1.2%, against a backdrop of surging oil prices following a Middle East crisis that broke out in late February 2026. Over the first four months of the year, cumulative highway traffic is down 2.5%, with a 3.2% drop for light vehicles alone. First quarter 2026 revenue nonetheless held stable, and order intake rose.

What makes this kind of soft patch less worrying than it looks is the concession model's own mechanics: Vinci does not simply own roads and airports, it holds very long duration contracts, often 30 to 99 years, granting it an exclusive right to operate and collect tolls over that period, generally indexed to inflation. A traffic decline of a few points over one quarter, triggered by a one-off oil shock, does not call into question the value of contracts that still run for decades. That is why Vinci keeps investing in new concessions rather than pulling back: the group signed the acquisition of the Safeway Concessions portfolio in India (9 toll highway concessions, roughly 700 kilometers), and was selected as the preferred bidder by the French state for the new A154-A120 highway concession (97 kilometers, over 35 years). Its VINCI Energies subsidiary also completed the acquisition of 8 new companies in the first quarter, representing roughly 80 million euros of combined annual revenue.

Why Vinci's debt is not a red flag (and why Thales's ROIC is misleading)

Two numbers in the table deserve an explanation, or they mislead. First, Vinci's debt (2.55 times annual free cash flow) may look high next to Thales's net cash position. But building a highway or an airport costs billions of euros before the first toll is ever collected, financed by very long term debt backed by equally long contracts. This is what is called permanent capital: structural debt financing an asset that will generate cash for decades, the opposite of short term debt signaling cash flow trouble. The real signal to watch is not Vinci's debt level, but its ability to meet its obligations with concession cash flow, which it has done for decades without a hitch.

Conversely, Thales's reported return on invested capital of 185.6% is a figure to treat with caution rather than admire at face value. Such an extreme ROIC usually means the denominator of the calculation, the capital actually tied up in the business, has become very small, here because Thales holds a net cash position rather than net debt. The figure confirms Thales does not need outside capital to fund its growth, a genuine positive, but it should not be read literally as 'Thales earns 1.85 euros for every euro invested': it is an artifact of the math when net invested capital shrinks close to zero.

The real paradox: why the lowest P/FCF does not win this match

At first glance, Vinci looks like the cheaper deal: a P/FCF (share price divided by cash generated each year) of 8.4 times versus 17.7 times for Thales. And yet my valuation model, which computes a fair buy price accounting for growth and the quality of capital, validates Thales (current price below its 231 euro target) but not Vinci (current price above its 86 euro target).

The reason lies in the nature of each company's future growth. Thales benefits from a structural, multi-year tailwind, already budgeted by several states for at least the next five years, with an order backlog securing that trajectory. Vinci, despite a remarkably stable asset base, depends more on the economic cycle and on traffic (travel, freight, industrial activity), a slower and more cyclical growth path, illustrated by the spring 2026 soft patch. A low P/FCF only has value if the quality and growth trajectory behind it justify it: here, the market pays a premium for Thales's visibility, and my model estimates that premium is justified, while Vinci's current price already prices in more growth than it is currently delivering.

How I settle it

I never recommend a specific stock, and both companies remain among the highest rated in my quality filter for different good reasons. But if I had to sum up the tension: Thales offers exceptional revenue visibility, backed by defense budgets legislated through 2030, at a price my model still considers reasonable despite a higher P/FCF. Vinci remains a remarkably stable cash machine over the very long run, but its current price leaves less margin of safety against a cyclical traffic slowdown, even though that slowdown in no way threatens the value of its concessions over several decades. See the full breakdown on the Thales and Vinci analysis pages, the ranking of top rated stocks, and my methodology.

• Thales (10/12 criteria, P/FCF 17.7x) benefits from a record order backlog of 53.3 billion euros at end of 2025, fueled by European rearmament budgeted through 2030; my model judges it below its fair buy price (231 euros versus a price of about 220 euros).
• Vinci (9/12 criteria, P/FCF 8.4x) suffered a 5% traffic decline on its highways in April 2026 (oil shock linked to a Middle East crisis), a cyclical soft patch that does not threaten its 30 to 99 year concessions; my model judges it above its fair buy price (86 euros versus a price of about 119 euros).
• Vinci's debt (2.55x FCF) is permanent capital backed by very long term contracts, not a warning sign; Thales's reported 185.6% ROIC mainly reflects its net cash position and should be read with caution.
• The lowest P/FCF (Vinci) does not automatically win: the quality of a valuation also depends on the visibility and nature of the growth behind it.
• Both remain very high quality companies for different reasons: budgetary visibility for Thales, duration and contractual resilience for Vinci.

FAQ

Why are Thales and Vinci both so highly rated?

Both validate at least 9 out of 12 criteria in my quality filter (profitability, growth, margins, controlled debt, return on capital), but for opposite reasons: multi-year budgetary visibility for Thales, duration and resilience of infrastructure concessions for Vinci.

Why isn't Vinci's debt a problem despite a 2.55x FCF ratio?

It is permanent capital: very long term debt backed by 30 to 99 year concessions that generate cash for decades. The signal to watch is the ability to meet obligations with concession cash flow, not the raw debt level.

Why does Vinci look cheaper than Thales with a lower P/FCF but isn't judged undervalued by the model?

A low P/FCF only has value if the growth and quality behind it justify it. Thales benefits from structural, multi-year growth already budgeted by several states, while Vinci's growth depends more on the economic cycle and traffic, which is more cyclical.

Is Vinci's 2026 highway traffic decline worrying?

It is a cyclical soft patch linked to an oil price surge after a Middle East crisis, not a challenge to the business model. Vinci's concessions run for 30 to 99 years and are generally indexed to inflation.

Should I buy Thales or Vinci in 2026?

My model judges Thales below its fair buy price and Vinci above its own as of mid-July 2026, but both remain very high quality companies. This is not personalized investment advice, do your own research.

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About the author

Written by Lubin Danilo, founder of Lubin Investment. A self-taught individual investor, I find fundamental analysis fascinating, and it has delivered excellent results. For three years now, my performance has beaten the S&P 500. But analyzing every stock took too much time: sites with incomplete data, calculation methods and criteria never aligned with mine. And spotting the best stocks was just as time-consuming, even with my own well-defined checklist. So I put my software development background to work to build this software, base my investment strategy on its results, and share it with people who share the same passion as me. It judges a company's quality and its price separately, using criteria drawn from the financial literature (Warren Buffett, Michael Mauboussin, Aswath Damodaran).