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Fifth Circuit Bars Surety's Subrogation Claims Against Prior OCS Leaseholders for Decommissioning Bond Payments

Lexon Insurance Company, Inc. v. Chevron U.S.A. Inc., et al. U.S. Court of Appeals, Fifth Circuit 24-20347 on appeal
By Joel Reese · July 20, 2026 U.S. Court of Appeals, Fifth Circuit

The Fifth Circuit affirmed summary judgment against Lexon Insurance, which issued performance bonds securing offshore decommissioning obligations and sought reimbursement from Chevron, BP, and Sojitz as prior leaseholders under subrogation, contribution, and unjust enrichment theories. Applying Louisiana law to fill gaps in OCSLA, the court held that the surety had no right of recourse against prior leaseholders who were non-parties to the bonds and that the prior leaseholders did not share an equal burden with the surety.

Fifth Circuit OCSLA Decommissioning Subrogation Performance Bonds

Background and Parties

Lexon Insurance Company issued performance bonds to the United States securing the well decommissioning obligations of an offshore oil and gas leaseholder on the Outer Continental Shelf adjacent to Louisiana. After paying out under those bonds, Lexon brought suit under the Outer Continental Shelf Lands Act (OCSLA) against three prior leaseholders—Chevron U.S.A. Inc., BP America Production Company, and Sojitz Energy Venture, Inc.—seeking reimbursement through claims for subrogation, contribution, and unjust enrichment. The district court granted summary judgment for the prior leaseholders and dismissed all of Lexon's claims.

The Subrogation Framework Under OCSLA

The Fifth Circuit began its analysis by examining whether federal law governed Lexon's subrogation claim. The court noted that the priority of sureties statute provides that a surety paying its principal's debt to the United States may bring a civil action for recovery. However, the court held that this statute did not apply because the prior leaseholders were not parties to the bonds Lexon issued. The court concluded that the surety could not seek subrogation against prior leaseholders under the priority of sureties statute.

Gap-Filling with Louisiana Law

Finding a gap in federal law on the precise issue of whether a surety could seek subrogation from non-parties to bonds securing OCS obligations, the court turned to Louisiana law as mandated by OCSLA's gap-filling provision. The court emphasized that all law on the Outer Continental Shelf is federal, and state law serves a supporting role, to be adopted only where there is a gap in coverage under OCSLA. The court further noted that federal courts may not create new federal common law to fill such gaps.

Louisiana's Legal Subrogation Doctrine

Under Louisiana law, the court examined whether Lexon qualified for legal subrogation—a remedy allowing a party who pays another's debt to step into the creditor's shoes. The court held that the surety did not have any right of recourse against prior leaseholders as a result of its payment under the bonds, and therefore it was not entitled to recover from prior leaseholders under Louisiana's legal subrogation remedy. Because the prior leaseholders had no contractual or legal obligation to Lexon, no right of recourse existed.

Co-Surety Analysis and Contribution

Lexon alternatively argued that the prior leaseholders should be treated as co-sureties sharing a common burden. The court rejected this theory, holding that the prior leaseholders did not share an equal burden with the surety, and therefore the prior leaseholders were not liable under Louisiana law for their proportional share of amounts that the surety paid under the bonds. The court further held that any presumption that the prior leaseholders agreed to share the burden of the principal obligation, and therefore were co-sureties under Louisiana law, was rebutted.

Unjust Enrichment Claim

Finally, the Fifth Circuit affirmed the dismissal of Lexon's unjust enrichment claim, holding that the prior leaseholders were not unjustly enriched by Lexon's payment under the bonds.