A bill to amend the Clean Air Act to modify the definition of renewable biomass for purposes of the renewable fuel standard, and for other purposes.
Summary
Senator Merkley's S5087, introduced July 22, 2026, expands the Clean Air Act's renewable biomass definition for the RFS, broadening eligible feedstocks. This early-stage bill, with bipartisan cosponsors, signals potential cost relief for advanced biofuel producers like GPRE, REGI, and GPP by lowering feedstock costs. No market data provided.
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Key Takeaways
- 1.S5087 expands RFS biomass definition, lowering feedstock costs for advanced biofuel producers
- 2.Bipartisan cosponsorship (6 senators from both parties) increases passage probability
- 3.No direct funding; impact is regulatory cost reduction for producers like GPRE, REGI, GPP
Market Implications
The bill's early stage limits immediate market impact, but the bipartisan support signals a credible path to passage. Advanced biofuel producers GPRE, REGI, and GPP are structurally positioned to benefit from reduced feedstock costs if the definition expands. No real market data is available to assess current pricing.
Full Analysis
On July 22, 2026, Senator Jeff Merkley (D-OR) introduced S5087, a bill to amend the Clean Air Act to modify the definition of renewable biomass for purposes of the renewable fuel standard (RFS). The bill was read twice and referred to the Committee on Environment and Public Works, placing it at an early legislative stage. The bill has six original cosponsors spanning both parties and independents, including Senators Hyde-Smith (R-MS), Padilla (D-CA), Kennedy (R-LA), Shaheen (D-NH), King (I-ME), and Collins (R-ME), indicating broad bipartisan support that may enhance its legislative momentum.
The money trail: This bill does not authorize or appropriate any specific funding amount. Its impact is regulatory: by expanding the definition of renewable biomass, it increases the pool of feedstocks eligible for RFS compliance. This reduces feedstock costs for producers of advanced biofuels (cellulosic ethanol, biodiesel, renewable diesel) by allowing cheaper or more abundant biomass sources. The mechanism is a regulatory change, not a direct spending program, so the financial impact flows through lower input costs for obligated parties and producers.
Structural winners: Advanced biofuel producers with exposure to RFS compliance are primary beneficiaries. GPRE (Green Plains Inc.) operates cellulosic ethanol facilities and stands to gain from lower-cost feedstocks. REGI (Renewable Energy Group) and GPP (Green Plains Partners) similarly benefit from expanded feedstock eligibility for biodiesel and renewable diesel. The bill does not directly affect traditional corn ethanol producers (e.g., $ADM, $ANDE) as their feedstock is already well-established under the RFS. No convergence signals were provided, so this bill is analyzed in isolation.
Timeline: As an early-stage bill referred to committee, it requires committee hearings, markup, and a full Senate vote. The bipartisan cosponsorship may accelerate progress, but no timeline is certain. The 119th Congress runs through 2027, providing a multi-year window for passage.
Intelligence Surface
Cross-referenced against federal contracts, SEC insider filings & congressional trade disclosures
No confirming evidence found yet from contracts, insider trades, or congressional activity
What the bill does
Expansion of renewable biomass definition under the Clean Air Act RFS
Who must act
EPA-regulated renewable fuel producers and obligated parties under the RFS
What happens
Broadened feedstock eligibility increases supply of qualifying biomass, lowering feedstock costs for advanced biofuel producers
Stock impact
GPRE's cellulosic ethanol production at its Emmetsburg, IA plant benefits from inclusion of additional biomass sources, reducing input costs and improving margins
Key Legislators
Connected Signals
Matched on shared policy language across AI analyses, with ticker & timing weight
To amend the Clean Air Act to modify the definition of renewable biomass for purposes of the renewable fuel standard, and for other purposes.
A resolution expressing support for the designation of May 2026 as "Renewable Fuels Month" to recognize the important role that renewable fuels play in lowering fuel prices for consumers, lessening reliance on foreign adversaries, supporting rural communities, and reducing carbon impacts.
To amend the Internal Revenue Code of 1986 to extend biodiesel and renewable diesel incentives, and for other purposes.
Supporting Energy and Economic Development (SEED) Act
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