Note 4. Revenue Recognition

Contract Balances

Contract assets as of April 30, 2025 and October 31, 2024 were $78.7 million ($33.3 million long-term) and $65.1 million ($28.3 million long-term), respectively. The contract assets relate to the Company’s rights to consideration for work completed but not yet billed. These amounts are included on a separate line item as Unbilled receivables, and balances expected to be billed later than one year from the balance sheet date are included within Other assets on the accompanying Consolidated Balance Sheets. We bill customers for power platform and power platform component sales based on certain contractual milestones being reached. We bill service agreements based on the contract price and billing terms of the contracts. Generally, our Advanced Technologies contracts are billed based on actual revenues recorded, typically in the subsequent month. Some Advanced Technologies contracts are billed based on contractual milestones or costs incurred.

Contract liabilities as of April 30, 2025 and October 31, 2024 were $7.1 million and $7.2 million, respectively. These amounts are included on a separate line item as Deferred revenue, and balances expected to be recognized as revenue beyond one year from the balance sheet date are included within Long-term deferred revenue on the accompanying Consolidated Balance Sheets. The contract liabilities relate to the advance billings to customers for services that will be recognized over time and in some instances for deferred revenue relating to variable consideration for previously sold products. The net change in contract liabilities represents customer billings offset by revenue recognized.

Consideration Payable to a Customer

As of October 31, 2023, the Company had recorded $6.3 million ($6.0 million long-term) as consideration payable to Toyota Motor North America (“Toyota”), which is included within Accrued liabilities and Long-term debt and other liabilities on the accompanying Consolidated Balance Sheets. The Company received payment for the sale of an investment tax credit with respect to the Toyota project at the Port of Long Beach during the year ended October 31, 2023. The net amount of $6.3 million is being recorded as a reduction to revenue during the period of measurement, which is the 20-year

term of the hydrogen production and power purchase agreement between Toyota and the Company (“Toyota HPPA”) that commenced in the first quarter of fiscal year 2024. The balance was $6.0 million ($4.5 million long-term) as of each of April 30, 2025 and October 31, 2024.

Advanced Technologies Revenue – EMTEC Joint Development Agreement and Rotterdam Pilot Project Purchase Order

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In May 2023, the Company entered into a second letter agreement with ExxonMobil Technology and Engineering Company (formerly known as ExxonMobil Research and Engineering Company) (“EMTEC”), pursuant to which the parties agreed that the conditions to the Company’s agreement to invest in the future demonstration of the technology for capturing carbon at an ExxonMobil refinery located in Rotterdam, Netherlands (such demonstration, the “Rotterdam Project”) were met in April 2023 and, as a result, the Company recognized $2.5 million of the $5.0 million milestone payment received in fiscal year 2022 under the Company’s Joint Development Agreement with EMTEC as revenue across deliverables to EMTEC. Of this $2.5 million, the Company recognized aggregate revenue of $2.0 million during fiscal years 2024 and 2023 and the remaining $0.5 million during the six months ended April 30, 2025. The other $2.5 million of the $5.0 million milestone payment received in fiscal year 2022 under the Company’s Joint Development Agreement with EMTEC was applied during fiscal year 2023 to discount EMTEC’s purchase of the Company’s fuel cell module and detailed engineering design for the Rotterdam Project.

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On January 31, 2024, the Company received a purchase order valued at $11.6 million from Esso Nederland B.V. (“Esso”), an affiliate of Exxon Mobil Corporation and EMTEC, for fuel cell modules as well as engineering, procurement, fabrication, testing and delivery services required for the construction and implementation of the modular point source carbon capture pilot plant at the Rotterdam Project. During the six months ended April 30, 2025, the Company and Esso executed two change orders totaling $4.0 million to the original purchase order, which increased the total purchase order value to $15.6 million. The Company expects that this pilot plant will be completed and commissioned in calendar year 2026.

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On and effective as of March 31, 2024, the Company and EMTEC entered into Amendment No. 5 (“Amendment No. 5”) to the Joint Development Agreement between the Company and EMTEC (as amended, the “Joint Development Agreement”). In Amendment No. 5, the Company and EMTEC further extended the term of the Joint Development Agreement such that it will end on December 31, 2026 (unless terminated earlier), so that the Company and EMTEC may pursue continued work to allow for technical readiness of the Generation 2 Technology fuel cell module as well as additional continuous technology development. In parallel with the Joint Development Agreement, the Company and EMTEC will pursue pioneer commercial deployments of the Generation 2 Technology with third parties, with the Company as the fuel cell module manufacturer for such deployments. Amendment No. 5 also removed the cap on the maximum amount of research costs to be reimbursed by EMTEC, and instead includes an expected annual budget for the anticipated work through the remaining term of the Joint Development Agreement of at least $10.0 million per year, subject to approval by EMTEC.

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In addition, Amendment No. 5 provides the Company with the ability to pursue new carbon capture projects with third parties for the remaining duration of the term of the Joint Development Agreement using Generation 1 Technology or Generation 2 Technology (provided that the use of Generation 2 Technology must be limited to the use of Generation 2 physical fuel cell properties and design elements in Generation 1 Technology modules), with any new sales of such activities, authorized work, and carbon capture projects, when summed together, having the capability of capturing no more than 250,000 tons of CO₂ on a cumulative annual basis. Under Amendment No. 5, following expiration of the term of the Joint Development Agreement, the Company will also have the opportunity to continue to service continuing obligations for such projects entered into during the term of the Joint Development Agreement (e.g., completion of contracted builds, service and repair/replacement of components, etc.). To allow the Company to pursue such projects, in Amendment No. 5, EMTEC also granted to the Company a worldwide, non-exclusive, royalty-free, irrevocable (during the term of the Joint Development Agreement), non-sub-licensable license to EMTEC’s Generation 1 Technology as well as to EMTEC’s Generation 2 Technology physical fuel cell properties and design elements.

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Long-Term Service Agreement with Gyeonggi Green Energy Co., Ltd.

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On May 28, 2024, the Company and Gyeonggi Green Energy Co., Ltd. (“GGE”) entered into a long-term service agreement (the “LTSA”) with respect to GGE’s 58.8 MW fuel cell power platform in Hwaseong-si, Korea (the “GGE Platform”). The GGE Platform is comprised of 21 SureSource 3000 molten carbonate fuel cells (each a “Plant”). Each Plant is comprised of two 1.4-MW carbonate fuel cell modules. Pursuant to the LTSA, GGE and the Company have agreed

that (i) GGE will purchase from the Company 42 1.4-MW carbonate fuel cell modules to replace existing fuel cell modules at the GGE Platform, (ii) the Company will provide certain balance of plant replacement components if and to the extent the parties reasonably determine existing components should be replaced, and (iii) the Company will provide long term operations and maintenance services for the GGE Platform. The total amount payable by GGE under the LTSA for the 42 replacement fuel cell modules, balance of plant replacement components, and service is $159.6 million USD, with payments made and to be made over time as such replacement fuel cell modules are commissioned and the service obligations under the LTSA for such Plants commence.

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Pursuant to the LTSA, the Company will provide various performance guarantees for each Plant related to power generation, fuel consumption, water consumption and heat production. If a Plant fails to achieve such performance requirements, the Company may be required to compensate GGE for such underperformance.

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The Company’s service obligations under the LTSA commence with respect to individual Plants as the Company replaces each Plant’s existing fuel cell modules and commissions the replacement fuel cell modules. The term of the LTSA with respect to each Plant will continue for seven years from the date of commissioning of the replacement fuel cell modules for such Plant. Commissioning of the first six 1.4-MW replacement fuel cell modules was completed in the fall of calendar year 2024, and commissioning of an additional four 1.4-MW replacement fuel cell modules was completed in the three months ended April 30, 2025. An additional 16 1.4-MW replacement fuel cell modules are expected to be commissioned ratably throughout the course of fiscal year 2025, and the remaining 16 1.4-MW replacement fuel cell modules are expected to be commissioned in fiscal year 2026.

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Remaining Performance Obligations

Remaining performance obligations are the aggregate amount of total contract transaction price that is unsatisfied or partially unsatisfied. As of April 30, 2025, the Company’s total remaining performance obligations were: $164.4 million for service agreements (expected to be recognized as revenue over approximately three to fifteen years which is based on the remaining term of the service agreements), $383.0 million for generation power purchase agreements (“PPAs”) (expected to be recognized as revenue over approximately nineteen to twenty years based on the PPA terms remaining), $7.9 million for Advanced Technologies contracts (expected to be recognized within approximately two years) and $98.2 million for product purchase agreements (expected to be recognized within the next two fiscal years).