Mobius Renewables Buys Air Liquide Biogas Assets for $1.1B

Mobius Renewables closed a $1.1 billion acquisition of Air Liquide's biogas production operations across the United States, France, Norway, and Sweden on Saturday, marking one of the largest renewable natural gas transactions in European history and accelerating consolidation in a sector that's attracted $8 billion in buyout capital since 2023.

The deal transfers 28 operational biogas production facilities with a combined nameplate capacity of approximately 150 megawatts — enough to power roughly 140,000 homes annually — plus another six sites under construction expected to come online by Q1 2027. Mobius is buying the assets through a mix of equity from its backers and $650 million in project-level debt arranged by BNP Paribas and Société Générale, according to people familiar with the transaction.

For Air Liquide, the sale represents a clean exit from a business segment that never achieved the margins of its core industrial gas operations. The French conglomerate had operated biogas facilities since 2018 but struggled to scale production economics in markets where renewable natural gas commands premium pricing but faces uncertain regulatory support. Air Liquide will redeploy proceeds toward hydrogen infrastructure projects in Asia and carbon capture ventures in North America, the company said in a statement.

Mobius, a five-year-old renewable fuels platform backed by Copenhagen Infrastructure Partners and Equinor Ventures, now controls one of the three largest biogas production footprints in Western Europe. The acquisition vaults the company past regional competitors like Scandinavian Biogas and positions it just behind market leader Énergies Vertes in total European capacity.

The transaction continues a pattern of industrial conglomerates stepping back from biogas as pure-play renewable fuel operators expand. Air Liquide's exit follows similar moves by Veolia, which sold its German biogas portfolio to Northleaf Capital in March, and Suez, which divested French assets to Antin Infrastructure Partners last year.

The shift reflects a strategic mismatch. Industrial gas giants operate on tight margin profiles — Air Liquide's EBITDA margins hover around 28% — and require predictable cash flows to justify capital deployment. Biogas projects, by contrast, carry development risk, face feedstock price volatility, and depend heavily on government subsidies that can shift with political winds.

"These are good businesses, but they're not Air Liquide businesses," said Henrik Andersen, a partner at Copenhagen Infrastructure Partners, in an interview. "You need patient capital, you need operational expertise in agricultural feedstocks, and you need a tolerance for regulatory uncertainty. That's not the industrial gas playbook."

Air Liquide's biogas division generated roughly €340 million in revenue last year but carried EBITDA margins below 18%, according to filings. The company had planned to expand capacity through 2025 but paused new development after France's 2024 budget reduced production tax credits for agricultural biogas by 15%. That policy shift — coupled with weaker-than-expected demand for renewable natural gas certificates in Scandinavia — triggered a strategic review that culminated in Saturday's sale.

The acquired portfolio breaks down into three distinct asset classes, each with different risk and return profiles.

First, 18 mature production facilities in France and Sweden that have been operating for at least three years. These plants run on long-term feedstock supply agreements with dairy farms and food processors, producing biomethane that's injected directly into regional natural gas grids. They generated approximately €280 million in trailing twelve-month revenue, benefiting from France's feed-in tariff system that guarantees above-market pricing for renewable gas through 2035.

Second, 10 newer facilities in the United States and Norway commissioned since 2022. These assets target the renewable fuel standard (RFS) credit market in the U.S. and the European Union's Renewable Energy Directive II framework. They're smaller on average — about 4 MW each versus 7 MW for the French plants — but command higher margins because they produce compressed biogas for fleet vehicle use rather than grid injection. That product attracts premium pricing from logistics companies seeking to decarbonize trucking operations.

Third, six greenfield projects under construction in Sweden and France. These represent the riskiest slice of the portfolio. All six have secured construction permits and feedstock contracts, but none have begun commercial production. Mobius estimates first gas from these sites in Q4 2026, with full ramp to nameplate capacity by mid-2027.

Mobius declined to break out revenue or EBITDA by segment but confirmed that the mature French and Swedish assets account for roughly 70% of current cash flow.

Every biogas facility lives or dies on feedstock — the organic waste that gets broken down in anaerobic digesters to produce methane. Air Liquide's portfolio sources material from three main channels: manure from dairy and hog farms (about 45% of total feedstock), food waste from processors and retailers (30%), and agricultural residues like corn stover and wheat chaff (25%).

At $1.1 billion for 150 MW of operating and near-term capacity, Mobius paid roughly $7.3 million per megawatt — a valuation that sits at the higher end of recent biogas transactions but below the $9-12 million per MW that pure-play RNG developers commanded in 2023 and early 2024.

The discount reflects two factors. First, Air Liquide needed to exit. The company had been shopping the portfolio since late 2025, and after an initial auction attracted only two credible bidders, pricing expectations came down. Second, about 10% of the acquired capacity remains under construction, which carries completion risk even though permits and contracts are in place.

Mobius is financing the acquisition with roughly $450 million in sponsor equity and $650 million in non-recourse project debt. The debt carries an average coupon of 5.8%, according to people close to the deal, reflecting lenders' comfort with the cash flow stability of the mature French and Swedish facilities.

That capital structure implies Mobius needs the portfolio to generate approximately €95-100 million in annual EBITDA to service debt and deliver mid-teens unlevered returns to its equity backers. That's achievable if the mature facilities maintain current margins and the under-construction sites come online on schedule. It gets harder if feedstock costs rise or if European governments scale back renewable gas subsidies faster than expected.

"The return profile here is not venture-scale, and it's not supposed to be," said Andersen. "This is infrastructure. You're buying contracted cash flows in jurisdictions with long-term policy support for decarbonization. The risk is that policy changes or feedstock availability deteriorates. But those are manageable risks if you operate well."

France and Sweden anchor the portfolio, and both markets offer relatively durable policy frameworks. France's feed-in tariff system guarantees prices between €95 and €115 per megawatt-hour for biogas injected into the grid, indexed to inflation, through contracts that run 15-20 years. Sweden operates a similar model with certificates traded in a secondary market.

The shakier ground is the U.S., where renewable fuel standard credits — the financial mechanism that makes biogas economically viable — face uncertain political futures. RFS credits traded as high as $2.80 per gallon-equivalent in 2023 but have since fallen to around $1.90 as the EPA delayed finalizing 2026 blending obligations. If a future administration scales back or eliminates the RFS, the 10 U.S. facilities Mobius just acquired would lose 40-50% of their revenue overnight.

Mobius isn't the only infrastructure investor betting big on renewable natural gas. Since 2023, private equity and infrastructure funds have deployed more than $8 billion into biogas platforms across Europe and North America, according to data from PitchBook and Infralogic.

The deal flow breaks into two camps. First, platform builds like Mobius — funds backing management teams to buy and consolidate scattered assets into scaled production footprints. Copenhagen Infrastructure Partners has backed Mobius since its 2021 formation, and the Air Liquide acquisition is the company's fourth material transaction in 18 months.

Second, vertical integrations. Energy utilities and natural gas distributors are buying biogas producers to decarbonize their own supply chains. Énergies Vertes, currently the largest European operator, is majority-owned by Engie, which uses the biogas output to meet its own renewable energy commitments. Similarly, Italy's Snam has acquired three biogas platforms since 2024 to green its pipeline throughput.

"The market is bifurcating," said Laura Chen, a principal at Blackstone's energy transition fund, which has evaluated but not yet invested in biogas. "You've got financial buyers building platforms to sell to strategics in five to seven years, and you've got utilities buying assets they'll hold forever. The financial buyers are paying 7-8x EBITDA. The utilities are paying 10-12x because they're valuing the renewable attributes, not just the cash flow."

Roughly 320 employees transfer to Mobius as part of the transaction, including site operators, feedstock procurement specialists, and a small engineering team based in Lyon. Air Liquide's corporate biogas development group — about 40 people who handled new project origination and permitting — will not move over. Most are being redeployed to Air Liquide's hydrogen and carbon capture divisions.

Mobius CEO Sven Utermöhlen said in a statement that retaining operational staff was "non-negotiable" during deal negotiations. "You can't run these facilities remotely," he said. "The people who know the local farmers, who understand the digesters, who troubleshoot when feedstock quality changes — they are the asset."

The Air Liquide transaction validates the thesis that biogas production is becoming a scaled infrastructure play rather than a niche renewables bet. Three years ago, the European biogas sector was fragmented across hundreds of small operators, most running one or two facilities tied to single farm cooperatives. Today, the top five operators control nearly 40% of total installed capacity.

That concentration brings operational efficiencies — better feedstock procurement, shared maintenance resources, optimized dispatch across facilities — but it also raises questions about market power. If a handful of platforms control the majority of renewable natural gas supply, they gain pricing leverage over utilities and fleet operators that depend on biogas to meet decarbonization mandates.

"We're watching this closely," said an official at France's energy regulator, who spoke on condition of anonymity because the agency hasn't formalized a position. "Biogas is still a small fraction of total gas supply, so market concentration isn't a problem yet. But if these platforms keep growing and buying out competitors, we may need to revisit how we regulate renewable gas pricing."

For Mobius, the immediate focus is integrating the Air Liquide assets without disrupting operations. Utermöhlen said the company won't pursue additional M&A until the acquired facilities are fully integrated, which he estimates will take 12-18 months.

After that, though, the platform is positioned to keep buying. Copenhagen Infrastructure Partners has €6 billion in committed but undeployed capital earmarked for energy transition investments, and biogas remains a priority sector. If smaller operators continue to struggle with financing and feedstock costs, Mobius will have opportunities to consolidate further.

For all the capital flowing into the sector, biogas still represents less than 2% of total natural gas consumption in Europe and under 1% in the United States. The fuel's ceiling isn't technological — anaerobic digestion works, and the methane it produces is chemically identical to fossil natural gas. The ceiling is feedstock.

There's only so much cow manure, food waste, and agricultural residue available within economical transport distances of production facilities. As operators scale up, they compete for the same feedstock sources, driving up costs and squeezing margins. Some analysts estimate that European biogas production could realistically triple from current levels before hitting hard feedstock constraints. That would still leave biogas supplying only 5-6% of total gas demand.

"It's a bridge fuel, not the endgame," said Chen. "Biogas helps decarbonize gas grids in the near term while hydrogen infrastructure gets built out. But it's not going to replace fossil gas at scale. The feedstock just isn't there."

Mobius executives push back on that framing. They argue that feedstock constraints are overstated and that new sources — including industrial organic waste and municipal sewage — remain underutilized. The company is also investing in research on gasification technologies that could convert woody biomass and crop residues into synthetic methane, potentially expanding the addressable feedstock pool.

Whether that bet pays off will determine not just Mobius's future but the trajectory of the entire renewable gas sector. For now, though, the company has built one of the largest biogas platforms in the West, and it did so by buying assets from an industrial giant that couldn't make the business model work. That dynamic — pure-play operators succeeding where conglomerates failed — is becoming the defining pattern in energy transition M&A.