Why Industrial Gases Trade at Premium Multiples

Premium Multiples Start With Contracted Cash Flow

Industrial gases are valued above commodity chemicals because much of their revenue is contracted. On-site plants, built at the customer’s site under long contracts with minimum purchases or fixed fees, become local monopolies once the capital is spent. Merchant (trucked bulk) and packaged (cylinder) sales add the economics of dense delivery routes, but the premium begins with those minimum-purchase floors.

The Through-Cycle Range

The primer screens the sector on through-cycle EBITDA, earnings averaged over a full business cycle:

The range is a cross-check, not a valuation. The primer values contracted and cyclical earnings separately, then compares the implied multiple with this range. Multiples above the range appear when the market expects high returns and backlog growth to last.

Where the Premium Comes From

Contract length and floors. On-site contracts run mostly 10-20 years at Linde, 15-20 years at Air Products and at least 15 years at Air Liquide, on minimum purchases, fixed monthly charges or take-or-pay terms. Commodity chemical earnings swing each quarter with the gap between product and feedstock prices; on-site gas revenue does not.

Local density. Air Liquide operates more than 9,500 km of pipelines. Linde’s FY2025 revenue was 35% packaged and 30% merchant, both reliant on dense delivery routes. Density cuts both ways: most delivery cost is fixed, so a lost tonne takes roughly half its revenue straight off profit. The primer puts that decremental margin, the profit lost per dollar of revenue lost, at an illustrative 40-60% or more on dense routes.

Capital sunk at the customer. The primer’s example plant, an air separation unit, splits air into oxygen, nitrogen and argon. It makes 2,000 tonnes a day, costs $250M, and under a 15-year take-or-pay the customer pays for at least 85% of that output. Once such a plant is built, a customer that switched supplier would have to pay for a second one.

A concentrated market. Linde describes itself as the largest industrial gas company worldwide. Its 10-K lists Air Liquide, Air Products, Messer and Mitsubishi Chemical (through Nippon Sanso) as global and regional competitors, alongside many small local distributors, and notes that customers own a significant share of plants themselves.

Scale and Margin Across the Majors

Neither size nor margin measures what the premium pays for. When energy prices rise, energy billed on to on-site customers at cost raises revenue but not profit, so the margin falls. And the four majors, Linde, Air Liquide, Air Products and Nippon Sanso, define EBITDA and operating margin differently. The margins by company guide sets out each on its own basis.

Returns Are Read Against the Cost of Capital

No two majors define return on capital the same way, so a gap between two of them mixes business with accounting. The premium rests on returns above the cost of capital: test a company’s return against its own cost of capital and its own history. The ROCE oligopoly guide sets the filed figures side by side with their definitions.

Debt When Capex Runs Ahead of Contracts

A premium multiple assumes contracted demand catches up with project spending. When clean-energy capex runs ahead of the contracts behind it, net debt rises before EBITDA does.

Air Products shows the sequence. Its FY2025 capex was $5.1bn, with $4.0bn guided for FY2026 in November 2025. Net debt reached about 3.1x adjusted EBITDA at 30 September 2025 (our calculation). It exited three US clean-energy projects in February 2025, booking about $2.4bn of pre-tax charges, and on 26 June 2026 decided to exit its Louisiana low-carbon hydrogen and ammonia complex as well.

For any gases company, capex that runs ahead of contracted EBITDA lifts leverage before earnings arrive, so check net debt against contracted EBITDA as well as the capex budget.