Green Plains Inc. faces an Environmental Protection Agency proposal that would reallocate 100% of ethanol volumes previously waived under the Renewable Fuel Standard's small-refinery exemption program, a policy that lands directly on one of the largest merchant ethanol producers in the country.

The draft rule, surfaced through financial-analyst reporting, would recapture every gallon of blending obligation excused from small refineries and redistribute those volumes to larger obligated parties in subsequent compliance years. For Green Plains, headquartered in Omaha and operating biorefineries across the Midwest, the proposal represents the most aggressive version of a policy reversal the company has pressed for in recent years.

Why does the small-refinery exemption matter to ethanol producers?

The Renewable Fuel Standard assigns annual blending obligations to refiners and importers based on the volume of gasoline and diesel they introduce into the U.S. market. The small-refinery exemption, created under the Energy Policy Act of 2005, allows the EPA to waive those requirements for refineries processing fewer than 75,000 barrels per day that can demonstrate disproportionate economic hardship.

When the agency grants a waiver, the waived volume does not simply disappear. Under longstanding EPA practice, those gallons roll forward into future years, where obligated parties must absorb them on top of their own annual requirements. The central question — whether none, some, or all of those volumes should follow the waiver — has defined the fight between ethanol producers, who argue for 100% redistribution, and refining interests, who contend that full restoration creates a windfall for blenders and an unexpected cost for obligated parties.

What does the proposal change for Green Plains?

The draft rule aligns the agency with the maximum position ethanol advocates have demanded. Green Plains leadership has argued, across earnings calls and industry forums, that the exemption program, when deployed expansively, erodes the demand floor the RFS was designed to create. A rule requiring 100% redistribution effectively cancels the volume benefit waived refineries received and forces larger refiners and importers to recover the difference.

For Green Plains and similar merchant producers, the practical question is how quickly the additional gallons translate into contracted volume. Ethanol plants sell into a market structured around RFS compliance, and the size of the annual obligation directly shapes the price and placement of every Renewable Identification Number traded alongside the fuel.

What happens between proposal and final rule?

The rule now enters a public comment period, after which the EPA must review submissions and issue a final determination. The agency's timeline — and the specific compliance year in which reallocated volumes first appear — will shape how refiners adjust blending decisions and how merchant producers size their forward contracts.

Refining trade groups are expected to challenge the rule through administrative petitions and litigation. The American Fuel & Petrochemical Manufacturers and the American Petroleum Institute have historically opposed full redistribution, arguing that the EPA's authority to reallocate waived gallons is constrained by the statutory text of the Clean Air Act.

What milestones will decide the outcome?

• The EPA's published comment-period deadline and the volume of industry submissions it draws.
• Whether the final rule applies the 100% figure prospectively only or seeks retroactive recovery of exemptions granted in earlier compliance years.
• Litigation filings from refining trade groups seeking a stay or judicial review.
• Green Plains' next quarterly disclosure, where management is likely to address the rule's expected impact on contracted volume, RIN markets, and 2026 plant run rates.