Mercuria Energy Group Limited v. Republic of Poland

CourtDistrict Court, District of Columbia
DecidedSeptember 8, 2025
DocketCivil Action No. 2023-3572
StatusPublished

This text of Mercuria Energy Group Limited v. Republic of Poland (Mercuria Energy Group Limited v. Republic of Poland) is published on Counsel Stack Legal Research, covering District Court, District of Columbia primary law. Counsel Stack provides free access to over 12 million legal documents including statutes, case law, regulations, and constitutions.

Bluebook
Mercuria Energy Group Limited v. Republic of Poland, (D.D.C. 2025).

Opinion

UNITED STATES DISTRICT COURT FOR THE DISTRICT OF COLUMBIA

MERCURIA ENERGY GROUP LIMITED,

Petitioner, Case No. 1:23-cv-03572 (TNM) v.

REPUBLIC OF POLAND,

Respondent.

MEMORANDUM OPINION

Mercuria Energy Group Limited, a Cyprian company, believes that the Republic of

Poland owes it interest related to a now-refunded fine it paid nearly two decades ago. After its

litigation efforts in Poland stalled, Mercuria turned to arbitration. The arbitration played out in

Sweden, and Mercuria secured a significant award against Poland. But a Swedish court annulled

that award. And it did so because a series of cases from the European Union’s high court have

largely invalidated the use of arbitration to resolve disputes between European Union members.

Mercuria sees things differently. It asks this Court to ignore those decisions and allow

Mercuria to enforce its annulled award in the United States. Mercuria asserts this is warranted

because the decisions of the European courts are so egregiously unfair that they violate basic

notions of fairness. The Court disagrees. Absent public policy concerns—which are not present

here—precedent requires the Court to respect the decisions of the European courts. And it will

do so by denying Mercuria’s petition for award enforcement. I.

In 2008, Poland imposed a financial penalty of over $100 million plus interest on one of

Mercuria’s subsidiaries. See Pet. to Confirm Arb. Award (“Pet.”), ECF No. 1, ¶¶ 7, 10.

Mercuria itself is based in Cyprus, but it has a subsidiary named JSE incorporated in Poland. See

Pet. ¶ 2; Resp’t’s Mot. Dismiss (“Mot. Dismiss”), ECF No. 28, at 20–21. Mercuria and JSE are

in the business of importing and trading petrochemicals, and the penalty was based on JSE’s

alleged failure to “establish and maintain compulsory stocks of liquid fuels as prescribed by

Polish law.” See Id.; Pet. ¶ 10. Mercuria and JSE then challenged the fine in a Polish court. See

Mot. Dismiss at 22.

After litigation, a Polish court overturned the penalty. See id.; Pet. ¶ 14. Poland then

repaid Mercuria the full penalty but did not compensate the company for its interest payments.

Pet. ¶ 15. Mercuria believed it was entitled to interest and pressed the issue, first with Polish

administrative agencies and then in Polish court. Id. ¶¶ 16–17. After a decade of unsuccessful

efforts, Mercuria resorted to arbitration in Sweden in 2019. See id. ¶¶ 7, 32–33.

The arbitration was anchored in Article 26 of the Energy Charter Treaty (“ECT”). Id.

¶ 8. The ECT is a 1994 multilateral energy sector treaty that sought to integrate Central and

Eastern European states into Western Europe’s market economy system. First Decl. of Prof.

Steffen Hindelang (“First Hindelang Decl.”), ECF No. 10, ¶ 17. Article 26 includes a standing

arbitration clause, allowing investors from one state to dispute the treatment of their investments

in another state. See Pet. ¶ 22. Sweden is one of the available arbitral forums under the ECT.

See id. Both Poland and Cyprus are signatories to the ECT and members of the EU. Pet. ¶¶ 20–

21.

2 Following a heavily litigated arbitration hearing in which both parties participated, a

Swedish tribunal ruled for Mercuria in 2022. Pet. ¶¶ 33–39, 41. Over Poland’s objection, the

tribunal concluded that it had jurisdiction to hear the dispute and then awarded Mercuria tens of

millions of dollars. See Pet. ¶¶ 40, 43.

In February 2023, Poland filed an application with Sweden’s high court, the Svea Court

of Appeal, to annul the award. Decl. of Martin Wallin (“Wallin Decl.”), Ex B, ECF No. 11-2. In

its application, Poland reasserted its jurisdictional objections. See id. ¶¶ 18, 27–30. It alleged

that under EU precedent, the ECT’s arbitration clause does not allow for arbitration of intra-EU

disputes where both states are EU members. See id. Given the potential impact the Svea Court’s

decision could have on Mercuria’s petition, the court stayed proceedings pending the outcome.

See Stay Order, ECF No. 26.

The parties extensively litigated their positions before the Svea Court, submitting four

rounds of briefing. See Mot. Dismiss at 35. In the end, the Svea Court sided with Poland and

issued a decision invalidating Mercuria’s arbitration award. See Poland v. Mercuria Energy

Grp. Ltd., Case No. T 2613-23, (Svea Ct. App., Dec. 23, 2024) (Swed.) (“Svea Ct. App.

Judgment”), ECF No. 28-3. The annulment rests on a series of decisions from the European

Court of Justice (“CJEU”) limiting the availability of arbitration to resolve disputes between two

EU member states. See id. at 11–13.

The first of these was Slovak Republic v. Achmea B.V., EU:C:2018:158 (March 6, 2018).

There, the CJEU rejected the use of arbitration clauses in bi-lateral treaties if both signatories are

members of the EU. See id. ¶¶ 56–60. Following Achmea, nearly two dozen EU states issued a

joint declaration in early 2019 notifying their citizens that intra-EU “investor-State arbitration

clauses . . . are contrary to [European] Union law and thus inapplicable.” See First Hindelang

3 Decl., Ex. 13, ECF No. 10-13, at 2. Though Achmea discussed only bi-lateral treaties, not multi-

lateral treaties like the ECT, the states cautioned that the ECT’s arbitration clause was likely

invalid too. See id. at 3. Mercuria’s home state of Cyprus was among the declaration’s

signatories. See id. at 13. Despite the declaration’s warning to “the investor community that no

new intra-EU investment arbitration proceeding should be initiated,” id. at 4, Mercuria forged

ahead with arbitration against Poland nine months later. See Pet. ¶ 32.

The joint declaration’s warning proved prescient. As predicted, the CJEU later extended

Achmea’s reasoning to invalidate intra-EU arbitration clauses in multi-lateral agreements like the

ECT. See Repub. of Moldova v. Komstroy, EU:C:2021:655 (September 2, 2021). In Komstroy,

the CJEU specifically targeted Article 26 of the ECT—the provision Mercuria relied on for

arbitration. According to the CJEU, applying Article 26 to disputes between two EU member

states would be manifestly incompatible with the EU’s governing legal framework.

Why? Because under the EU’s legal system, a body that interprets and applies EU law

must be “subject to mechanisms capable of ensuring the full effectiveness of the rules of

the European Union.” Komstroy ¶ 51. EU courts satisfy this requirement because they can refer

questions on EU law to the CJEU for guidance; but arbitration tribunals lack any such referral

mechanism. See id. ¶ 53. Because the ECT “is an act of EU law,” any arbitration under Article

26 requires the arbitrators to interpret and apply provisions of EU law. Svea Ct. App. Judgment

at 12; see also Komstroy ¶ 50 (“[A]n arbitral tribunal such as that referred to in Article 26(6)

ECT is required to interpret, and even apply, EU law.”). So allowing arbitration tribunals to

weigh in on the contours of EU law without CJEU guardrails violates the fundamental legal

structure of the EU. At least so says the CJEU.

4 Against this backdrop, the Svea Court found that the arbitration leading to Mercuria’s

award was “incompatible with the fundamental rules and principles governing the legal system

in the EU and thus also in Sweden.” Svea Ct. App. Judgment at 13. It thus “declare[d] the

arbitral award invalid.” Id. at 16. The Svea Court also awarded Poland attorney’s fees based on

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