SAF Biorefineries: Feedstock Flexibility Redefines Asset Valuation in 2026

The advanced biofuels market is experiencing an unprecedented bifurcation phase. Contrary to expectations of widespread margin erosion linked to HVO (Hydrotreated Vegetable Oil) saturation, sector financial data reveals a marked divergence between integrated players and mid-sized operators. This segmentation requires an overhaul of valuation approaches for sector investors.

Neste Defies Forecasts with Rising Margins

Finnish company Neste’s third-quarter 2025 results illustrate this dynamic. According to data disclosed by the company, the sales margin for renewable products reached $480 per tonne, compared to $341 per tonne in the comparable period of the previous year. This performance surprised analyst consensus, which had anticipated margin compression. The company indicates that this outperformance relies on its ability to switch to low-cost waste and optimize its global supply chains.

For financial analysts, this situation requires a revision of Discounted Cash Flow (DCF) models. A biorefinery’s value would no longer lie in its nameplate capacity, but in what professionals term “Feedstock Arbitrage Flexibility.” A plant designed to process only standard feedstocks now presents a high-risk profile. Conversely, assets capable of pre-treating complex feedstocks would justify higher EBITDA multiples, estimated between 10x and 12x.

The Capital Intensity Trap

Analysis of LanzaTech’s trajectory over the 2024-2025 period offers a complementary lesson. The shift from a licensing model, generating gross margins above 80-90%, to physical production activity mechanically dilutes overall profitability. This evolution validates what some analysts call the “Producer’s Curse” in industrial biotech.

For asset evaluators, this reality requires a sum-of-the-parts valuation approach. The technological component must be isolated from the industrial component. Physical molecule production constitutes a capital-intensive activity with low operating margins, particularly during scale-up phases. The observed pivot toward cosmetics markets confirms this constraint: Sustainable Aviation Fuel (SAF) would not be sufficient to cover the cost of capital for a new facility.

A Tripartite Revenue Structure

Global SAF production, confirmed by IATA (International Air Transport Association) at 1.9 million tonnes in 2025, remains in a physical shortage situation. However, airlines, operating with net margins below 3%, struggle to absorb the green premium alone. Financial modeling of a viable SAF project would now rely on a tripartite structure: the physical stream sold at fossil market price, the regulatory stream from credit mechanisms, and the voluntary stream linked to environmental attribute purchases by third-party companies.

Banks apply a 20 to 40% haircut on regulatory revenues in their debt models, due to associated political risk. A biorefinery presenting a business plan exclusively oriented toward SAF from year one would be difficult to finance, or would need to incorporate a discount rate above 15-18% to reflect execution risk.

Obsolescence Risk for First-Generation Assets

The emergence of synthetic palm oil substitute technologies through gas fermentation poses a threat to first-generation HEFA (Hydroprocessed Esters and Fatty Acids) biorefineries. If these technologies reach commercial scale within a three-year horizon, the terminal value of current assets would need revision. Sustainability criteria are tightening in Europe, reinforcing this regulatory risk.

The ability to arbitrage toward non-energy products becomes a central evaluation criterion. A facility capable of redirecting part of its volumes toward chemicals during a carbon price collapse would present a different risk profile than a plant exclusively dedicated to fuel. This paradigm shift, from energy refinery to materials refinery, could dictate industrial valuations in the sector in the coming months.