ExxonMobil Escalates Challenge to EU Carbon Storage Mandate With Arbitration Notice

ExxonMobil has moved its dispute over Europe's carbon storage rules into formal arbitration, according to a report from the Financial Times that cited an internal memo from the European Commission.

The case targets provisions in the EU's Net-Zero Industry Act that require large oil and gas producers to help build CO2 storage capacity by 2030. The Commission told the trade policy committee of the Council of the European Union about the notice of arbitration last month and is now preparing its response.

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From Notice of Dispute to Arbitration

The filing builds on a notice of dispute that ExxonMobil affiliates in Belgium, Luxembourg and the UK lodged in July under the Energy Charter Treaty. That step opened a cooling-off period meant to encourage a settlement before any formal claim.

The EU announced its withdrawal from the treaty in 2024. A sunset clause, though, still lets investors bring claims for years afterward.

In its statement on the rules, ExxonMobil said producers are being asked to supply storage "despite the absence of a viable market for carbon capture and transportation." The company argues the timelines are unrealistic and will raise energy costs for Europeans.

When the original notice surfaced in July, a Commission spokesperson told Inside Climate News it was confident that "the measures adopted by the EU comply with the Energy Charter Treaty."

What the EU Storage Rule Requires

The Net-Zero Industry Act sets a Union-wide goal of at least 50 million tonnes of annual CO2 injection capacity by 2030. The Commission sees this as a first step toward giving hard-to-abate industries and permanent carbon removals reliable access to storage.

In May 2025, the Commission assigned individual shares of that target to 44 oil and gas producers. Each share is based on the company's portion of EU oil and gas output from 2020 to 2023.

According to an analysis by the Carbon Balance Initiative, ExxonMobil holds stakes of 50% or more in five obligated entities. Together, they carry about 8.89 million tonnes per year, or nearly 18% of the 2030 goal.

A Wider Legal Fight

The arbitration runs alongside separate cases at the EU General Court, where 12 obligated entities are challenging the storage obligation. The dispute also lands as Brussels faces pressure over other climate rules, including last month's delay to methane-emissions requirements for oil and gas imports.

CCS Momentum in North America

The European fight contrasts with ExxonMobil's steady carbon capture build-out in the US. In September, the company began CCS operations at Nucor's direct reduced iron facility in Convent, Louisiana, a project designed to capture and store up to 800,000 metric tons of CO2 per year.

That marked ExxonMobil's third CCS startup for a third-party customer. Its Rose carbon storage project in Texas has also received approval from the Railroad Commission of Texas, a key step for the company's first Class VI storage site on the Gulf Coast.

ExxonMobil reports roughly 9 million tonnes per year of contracted CO2 from industrial customers across its Gulf Coast network.

About ExxonMobil

ExxonMobil is a US-based energy and chemical company headquartered in Texas. Through its Low Carbon Solutions business, it operates a CO2 pipeline network of more than 1,300 miles along the US Gulf Coast and provides carbon capture, transport and storage services to industrial customers.