The pattern in one line: renewable diesel is where distressed assets get recapitalized or wiped out; SAF and RNG are where growth capital and strategic buyers are still actively deploying; ethanol consolidation is happening plant-by-plant, not company-by-company.

The defining 2025 event in global biofuels M&A wasn't really an acquisition — it was a debt-for-equity wipeout. Global Clean Energy Holdings, which had converted a Bakersfield, California refinery to renewable diesel production, filed Chapter 11 on 19 April 2025 in the Southern District of Texas, listing roughly $2.1 billion in total potential claims: about $1.1 billion in secured debt plus $958.5 million in claims from its engineering contractor, CTCI Americas, following a dispute over construction delays and cost overruns. The restructuring-support agreement had backing from creditors holding 100% of the revolving credit facility claims, 96% of the term loans, and 100% of CTCI's claims before the filing even happened.

The outcome: senior lenders led by Orion Infrastructure Capital took 44.4% of new preferred equity and 100% of new common equity; CTCI took the remaining 55.6% of preferred equity in partial satisfaction of its claim; Vitol, the feedstock supplier, converted its revolving-facility claims into a new exit facility. Public shareholders received nothing. The company emerged from bankruptcy in mid-August 2025 under a new name, Grapevine Energy Holdings.

Set against that, sustainable aviation fuel and renewable natural gas are where deal activity looks like ordinary strategic M&A rather than distress management. SAF developer XCF Global entered a business combination agreement with DevvStream and Southern Energy Renewables in April 2026 to build a combined SAF/green-methanol platform, having already acquired New Rise Renewables' SAF production facility in Reno, Nevada. Montana Renewables (owned by Calumet) isn't an M&A story but is the segment's largest capital event of the period: a $1.44 billion US DOE loan guarantee, with a first drawdown of approximately $782 million in February 2025 alongside a further $150 million Calumet equity investment, funding an expansion (called MaxSAF) toward roughly 300 million gallons/year of SAF capacity by 2028 — about half of that online by 2026.

In RNG, the notable 2025 move was strategic rather than financial-distress-driven: shipping line CMA CGM made a minority investment in biogas producer Vanguard Renewables through its PULSE energy fund, announced 20 August 2025, securing long-term RNG (bio-LNG) supply from up to four dedicated projects for its own maritime decarbonization — a customer buying into its supplier's capacity rather than a financial rollup. That's a different kind of deal from the RNG sector's earlier consolidation wave: Archaea Energy's $215 million acquisition of NextGen Power Holdings (14 landfill-gas-to-electricity plants), announced April 2022 and closed that July, is still the deal that set the template for the segment's rollup logic, even though it predates this cycle.

US ethanol consolidation in this period has been about single-facility transactions between existing large players, not corporate mergers. POET agreed to buy Green Plains' 120 million-gallon-per-year Obion, Tennessee plant for $190 million in cash (announcement 27 August 2025, closed 26 September 2025) — the deal became POET's 35th facility, taking its combined capacity to roughly 3.1 billion gallons/year, while Green Plains used the proceeds specifically to retire junior mezzanine debt due in 2026. Separately, Gevo's sale of its Agri-Energy ethanol plant (in Luverne, Minnesota, 18 million gallons/year) to A.E. Innovation — reported here in August as expected to close by the end of 2025 — completed around November 2025, per Gevo's own investor-relations release and corroborating coverage from DTN/Progressive Farmer; the price remains undisclosed. Gevo retained its separate isobutanol production assets at the same site (roughly 1 million gallons/year) for chemicals, racing-fuel and jet-fuel feedstock markets.

India's ethanol sector saw a genuine ownership consolidation, though not the one that first surfaces in casual searches: it was Triveni Engineering & Industries — not Shree Renuka Sugars, a name that comes up in some secondary sourcing but doesn't hold up against primary reporting — that built a controlling stake in Sir Shadi Lal Enterprises (SSEL) across two tranches: 25.43% for ₹35 crore in January 2024, then an additional 36.34% for ₹45 crore in June 2024, taking its total stake to 61.77% for a combined ₹80 crore. This sits against the backdrop of India hitting 20% ethanol blending five years ahead of schedule and roughly ₹40,000 crore in distillery investment already committed — capacity build-out has so far outpaced outright company-level M&A in India's ethanol sector.

The most specific, well-documented biodiesel deal of the period is HD Hyundai Oilbank and Tenet Equity Partners' acquisition of Daekyung O&T, Korea's largest biodiesel-feedstock maker, for approximately ₩500 billion (announced May 2026) — Tenet Equity holding about 80% of the consortium's stake and HD Hyundai Oilbank the remaining 20%. The sellers were SK On, Eugene Private Equity and KDB PE, who had themselves bought Daekyung for about ₩400 billion in 2021: the company changed hands twice in five years, its price rising roughly 25% over that period. Daekyung turns animal fats from slaughterhouses and used cooking oil into biodiesel feedstock for automotive fuel, marine fuel and SAF, and posted ₩501.3 billion in revenue with ₩35.7 billion operating profit in its most recent reported year — a real, profitable business, not a distressed asset, which is part of why a strategic refiner was willing to pay up for feedstock security.

In the US, Buffalo Biodiesel was acquired by HydroGenetics (24 October 2025), alongside a separate $300 million growth-capital partnership with Verite Capital Partners aimed at expanding the company's footprint from 15 states to 25 across the eastern US — growth financing layered onto an ownership change, rather than a straightforward distressed sale.

Not every renewable-diesel problem has resolved into a clean transaction yet. World Energy's SAF-producing refinery in Paramount, California lost a key partner when Air Products terminated its agreement to fund the facility's SAF expansion (24 February 2025), and by late July 2025 the Paramount refinery had reportedly gone four months without producing SAF at all. No sale, bankruptcy filing or restructuring has been reported for World Energy as of the sourcing available to this piece — it's an open distress case, not a closed deal, and worth watching as a possible second Global Clean Energy-style event.