Should you buy Air Liquide (AI) stock in 2026?

2026-07-31 · By Lubin Danilo, founder of Lubin Investment

AI.PA: see the full analysis on Lubin Investment

Air Liquide validates 6 of my 10 quality criteria, backed by a powerful local moat and expanding margins. But its revenue has declined for three years and my model shows a stock trading well above my reasonable buy price. A fine company, but not at today's price by my numbers. Here is why.

The local monopoly almost nobody notices

Air Liquide supplies industrial and medical gases (oxygen, nitrogen, hydrogen) to factories and hospitals worldwide. On paper, that sounds like a commodity business. In reality, it is one of the most underrated moats (a durable competitive advantage that keeps rivals from taking your place) on the market: shipping liquefied gas costs so much beyond a few hundred kilometers that Air Liquide builds its plants directly on, or right next to, its customers' sites, under contracts running fifteen to twenty years. Once the plant is built and the contract signed, no competitor can profitably build a rival plant nearby to undercut prices: geography protects Air Liquide far better than a patent ever could.

This position shows up in the numbers: net margin reaches 13.1%, and margins have been expanding for five years (revenue growing faster than costs), a sign that pricing power remains intact despite a tough industrial backdrop in Europe. Shares outstanding have stayed nearly flat (+0.13% a year), with no meaningful dilution for existing shareholders.

Why my filter validates only 6 out of 10 criteria

The item breaking a perfect score is growth. Air Liquide's revenue has declined 3.5% a year on average over five years: 29.9 billion euros in 2022, then 27.6 billion in 2023, 27.1 billion in 2024, and 26.9 billion in 2025. Part of this decline reflects currency effects and the pass-through of energy costs into selling prices in 2022 (an artificial peak tied to the post-Ukraine energy crisis that mechanically inflated billed revenue), but the underlying trend still looks clearly soft for a company of this size.

Cash return on capital employed (Cash ROCE, what each dollar reinvested in the business earns back) comes in at 10.2%, below my 15% threshold. That is the price of a heavy industrial model: each new on-site plant costs hundreds of millions of euros and takes years to reach its full cash-generating potential, unlike a software vendor that can duplicate its product at near-zero cost. Net debt, meanwhile, would take 3.72 years of free cash flow to repay, slightly above my 3-year alert threshold: a direct consequence of massive hydrogen investment weighing on the balance sheet before it pays off.

Hydrogen: an expensive bet today for tomorrow

Air Liquide is investing heavily in electrolyzers (machines that split water into hydrogen and oxygen using electricity) and hydrogen distribution stations, serving both heavy industry seeking to decarbonize (steel, refining, chemicals) and mobility (fuel-cell vehicles). It is a long-term bet: these investments weigh on capital spending today without yet generating meaningful cash flow, which partly explains the relatively modest free cash flow margin of 9.9%, just under my 10% threshold. The group is also investing in electronics gases, a segment lifted by the relocation of semiconductor manufacturing to Asia and North America, more cyclical but higher value-added.

The price: a reputation discount, not a real one

Air Liquide trades at 37.1 times its annual free cash flow (P/FCF), a multiple well above my 25-times vigilance threshold. Many French retail investors buy Air Liquide with eyes closed because it is a familiar name, a CAC 40 pillar reputed to be defensive. The problem is that a reputation for quality says nothing about the price paid today to access it.

My reasonable-buy-price model, which projects the five-year cash-per-share trajectory rather than relying on today's displayed multiple, puts the entry point at roughly $66.37 (in my model's reference currency terms) against a current price of $171.48. That is a 61.3% premium. The reason is straightforward: with free cash flow per share growing just 1.2% a year over five years, a 37-times multiple becomes very hard to justify, even for a company of this operational quality. A high P/FCF is only earned if the growth behind it is too, and here growth is missing.

The real debate

The question to settle is simple: do you believe hydrogen and electronics investments will reignite today's stalled growth, retroactively justifying the current multiple? Or is the market paying, out of habit and reputation, for a quality that has not translated into growth for three years? Air Liquide remains a very high-quality industrial asset (expanding margins, a real geographic moat, a dividend paid without interruption for decades, growing 10.2% a year over the last five years), but business quality and stock price remain two separate questions, as always in my method.

How I settle it

I judge Air Liquide as a good-quality company (6 out of 10 criteria, a real local moat, expanding margins) but currently expensive relative to its own growth trajectory. Brand and a defensive-value reputation do not replace the numbers: until revenue and cash-per-share growth clearly turn around, I feel no urgency to pay 37 times free cash flow. I am keeping Air Liquide's page on watch. This is exactly the kind of debate between reputation and real numbers I built my stock analysis tool to settle.

Air Liquide validates 6 out of 10 criteria: a strong geographic moat (plants built on the customer's site, 15 to 20 year contracts) and expanding margins, but stalled growth.
Revenue has declined 3.5% a year on average over five years (29.9 billion euros in 2022 to 26.9 billion in 2025), partly a normalization after the 2022 energy peak.
Massive hydrogen investment (electrolyzers, stations) weighs on the balance sheet and free cash flow margin (9.9%) before it pays off.
P/FCF of 37.1x, well above my 25x threshold, for free cash flow per share growth of just 1.2% a year over five years.
My reasonable-buy-price model shows a 61.3% premium: a fine company, but not at today's price by my numbers.

FAQ

What is Air Liquide's moat?

A geographic moat: shipping liquefied gas is so expensive beyond a few hundred kilometers that Air Liquide builds its plants directly on customer sites, under 15 to 20 year contracts. No competitor can profitably build a nearby plant to undercut prices.

Why is Air Liquide's revenue falling if the company is considered solid?

Partly due to a normalization effect: 2022 was inflated by passing energy costs through to selling prices during the post-Ukraine energy crisis. Since then, prices have normalized, revealing softer underlying growth.

Will hydrogen reignite Air Liquide's growth?

That is the group's bet: massive investment in electrolyzers and hydrogen distribution for industrial decarbonization and mobility. These investments currently weigh on generated cash without yet showing a measurable growth payoff in the numbers.

Should you buy Air Liquide stock in 2026?

My quality filter validates 6 out of 10 criteria, but my model shows a 61.3% premium versus my reasonable buy price, as cash-per-share growth does not yet justify such a multiple. This remains analysis, not personalized investment advice: do your own research.

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).