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Aemetis (AMTX) customer map: concentrated buyers, government contracts, and where the cash flows land

Aemetis operates renewable fuels and RNG facilities in North America and India and monetizes through the sale of biodiesel, ethanol, renewable natural gas (RNG), CO2 and associated environmental attributes. In the U.S., Aemetis sells ethanol and by‑products through designated fuel marketers and resellers; in India the Kakinada biodiesel plant sells to government Oil Marketing Companies under cost‑plus tenders; RNG and CO2 generate utility and industrial revenue streams via pipeline and offtake arrangements. Investors should view Aemetis as a manufacturing and commodity marketer with concentrated counterparty exposure in California and government‑driven demand in India. For an at‑a‑glance resource on corporate customer exposure, visit https://nullexposure.com/.

Who buys what — the customer roster in plain English

Below are every customer relationship disclosed in the available filings and press releases, each summarized in one to two sentences with source references.

J.D. Heiskell

Aemetis sells substantially all ethanol, wet distillers grain (WDG), corn oil (DCO) and CDS produced at its California ethanol plant to J.D. Heiskell under an exclusive purchasing agreement; Heiskell then resells to marketers designated by Aemetis. According to Aemetis' 2024 Form 10‑K, J.D. Heiskell accounted for 98%–100% of California Ethanol segment revenue for 2023–2024, demonstrating extreme concentration risk.

Murex LLC

Aemetis has designated a single fuel marketing company, Murex LLC, to purchase its ethanol, and Murex resells into the fuel blender market; Aemetis’ ethanol pricing is tied to quarterly sales contracts that reference spot price indexes. The 2024 Form 10‑K documents Murex as the exclusive ethanol buyer and notes ethanol price mechanics based on quarterly contracts and spot indexes.

A.L. Gilbert, Co.

A.L. Gilbert, an animal feed company adjacent to the Keyes ethanol plant, is designated to sell and distribute Aemetis’ WDG (wet distillers grain). The company disclosed this distribution arrangement in its 2024 Form 10‑K.

Hindustan Petroleum

Aemetis sold biodiesel to Hindustan Petroleum as one of the Indian government Oil Marketing Companies (OMCs) during 2023 and 2024. The 2024 Form 10‑K lists Hindustan Petroleum among the OMC customers for Kakinada Plant biodiesel deliveries under government tenders.

Bharat Petroleum

Bharat Petroleum is another named OMC customer of Aemetis’ India biodiesel operations, receiving biodiesel deliveries in 2023–2024 under the government tenders and sales contracts referenced in the 2024 Form 10‑K.

Indian Oil Corporation

Indian Oil Corporation (IOC) also purchased biodiesel from Aemetis in 2023–2024 as part of OMC sales executed by the Kakinada Plant, per disclosures in the 2024 Form 10‑K.

PG&E (Pacific Gas & Electric)

Aemetis’ biogas central digester project near Modesto delivers RNG into the PG&E utility gas pipeline; press reporting notes multiple dairies connected, 36 miles of pipeline, and a central RNG production facility delivering into PG&E’s system. A GlobeNewswire release (June 2025) describes the Modesto project and the operational RNG pipeline into PG&E.

India Oil Marketing Companies (collective)

Aemetis reported $14.5 million of revenue in Q3 2025 from allocations that converted into sales to India OMCs, underscoring the revenue contribution from government allocations at the Kakinada Plant. This figure was disclosed in Aemetis’ October–November 2025 press reporting of third‑quarter results (GlobeNewswire, Nov 2025).

What these relationships imply about Aemetis’ operating and business model

Aemetis is a manufacturing‑centric producer that outsources market access through designated purchasers and government tenders rather than selling directly to many end users. The customer mix and the constraints in the filings reveal several structural characteristics:

  • Contracting posture — short‑term pricing for commodity outputs. Aemetis’ ethanol price framework is driven by quarterly sales contracts through Murex that reference spot indexes, which signals short‑term, index‑linked contracts rather than long‑dated fixed‑price offtakes; this contract structure was described in the 2024 Form 10‑K and is explicitly tied to Murex.
  • Concentration — acute single‑buyer exposure in California. The exclusive purchasing arrangement with J.D. Heiskell produces critical concentration: J.D. Heiskell accounted for nearly all California ethanol segment revenue (98%–100%), a company‑level dependency disclosed in the 2024 10‑K.
  • Counterparty composition — government as a major counterparty in India. Aemetis’ India revenue is driven by government OMC tenders and sales contracts (Hindustan Petroleum, Bharat Petroleum, Indian Oil), which creates revenue visibility tied to tender cycles and government procurement rules; the 10‑K links Kakinada Plant sales to OMC contracts in 2023–2024.
  • Role segmentation — resellers and distributors dominate market access. Murex and J.D. Heiskell function as buyers/resellers; A.L. Gilbert is a designated distributor for WDG. The 10‑K explicitly identifies these roles.
  • Maturity and operational stage — active revenue streams but project growth weighted to attributes and RNG. Aemetis runs active commodity sales and is also monetizing RNG pipelines and environmental attributes; GlobeNewswire releases in 2025 described operational RNG deliveries and India OMC revenue conversions, reflecting both current cashflows and mid‑stage project commercialization.

Key investment implications — risks and upside

  • Concentration risk is material and immediate. The J.D. Heiskell arrangement creates single‑buyer exposure in California; a change in that relationship or its terms would materially affect near‑term U.S. ethanol revenue. (10‑K disclosure.)
  • India sales are government‑driven but sizable and repeatable. Sales to OMCs provide volume certainty under cost‑plus contracts, yet they embed policy and tender execution risk; recent Q3 2025 revenue of $14.5m from OMC allocations demonstrates meaningful contribution (GlobeNewswire, Nov 2025).
  • Commodity pricing and short‑term contracts leave margins exposed to spot volatility. Quarterly indexing of ethanol prices via Murex implies revenue sensitivity to daily market prices (10‑K).
  • RNG and pipeline offtakes into utility systems create diversification away from fuel commodity cycles. The Modesto RNG project delivering into PG&E’s pipeline is a structural shift to utility‑style revenue streams (GlobeNewswire, June 2025).

If you are evaluating Aemetis’ counterparty risk profile or modeling segment cashflows, examine the J.D. Heiskell contract economics, the cadence of OMC tenders at Kakinada, and RNG pipeline tariffs. For a centralized view of customer dependency and contract types, see https://nullexposure.com/.

How to use this intelligence in diligence and monitoring

  • Request contract terms or summaries for the J.D. Heiskell purchasing agreement and Murex quarterly contract clauses to model revenue concentration and pass‑through pricing.
  • Track Indian OMC tender calendars and allocations at Kakinada to forecast near‑term biodiesel volumes and margins.
  • Monitor RNG pipeline receipts into PG&E and associated environmental attribute realizations as a stabilizing revenue source.

Aemetis is a commodity manufacturer with concentrated off‑take structures and a bifurcated geographic profile — California markets served through resellers and India markets served through government OMCs — which directly shapes valuation sensitivity to contract renewal, spot fuels, and policy execution. For ongoing updates on counterparty concentration and contract signals, visit https://nullexposure.com/.

Final takeaway: Aemetis generates product revenue through a small set of designated buyers and government tenders; investors should prioritize contract disclosure and tender cadence over broad market estimates when assessing near‑term cashflow stability. For more targeted customer exposure intelligence, explore https://nullexposure.com/.