Shipowner Ernst Jacob and marine insurer SIGCo will pay $17 million to settle US and Puerto Rico claims over coral reef damage from a grounding.
A federal judge in Puerto Rico signed off on the deal on May 5, 2026, ending more than four years of litigation that pulled in not only the shipowner but his insurer and a Protection and Indemnity club. The case offers a striking look at how marine insurers can find themselves directly on the hook in environmental enforcement actions, rather than simply backing their insureds from behind the scenes.
The dispute traces back to the grounding of the tank vessel T/V Margara in Puerto Rican waters, an incident that posed a substantial threat of an oil discharge and damaged coral reefs and associated marine resources. The United States, acting on behalf of the Coast Guard and the National Oceanic and Atmospheric Administration, filed suit in December 2021 under the Oil Pollution Act, seeking to recover damages already paid out of the Oil Spill Liability Trust Fund as well as the cost of restoring the injured reefs. Ernst Jacob was named alongside his insurer, Shipowners Insurance and Guaranty Company, known as SIGCo. The Commonwealth of Puerto Rico's Department of Natural and Environmental Resources joined the case as an intervenor in late 2022, asserting claims under federal and local environmental laws.
The litigation quickly grew more complicated. SIGCo brought third-party claims against Margara Shipping Company and Steamship Mutual Underwriting Association, a P&I club, and Ernst Jacob filed his own third-party claim against Steamship Mutual. The court filings do not detail the specific policy terms or coverage clauses at play between the insurers, the P&I club, and the insured, but the structure of the case reflected the layered way marine risks are typically underwritten.
The government initially appeared to be on solid ground. The district court granted partial summary judgment in favor of the United States on the question of liability under the Oil Pollution Act. The settling defendants appealed, and in October 2025, the US Court of Appeals for the First Circuit vacated and reversed parts of that ruling, sending the case back down for further proceedings. The First Circuit also turned away the government's request for a rehearing on a narrower issue. By the time the appellate mandate returned jurisdiction to the district court at the end of March 2026, both sides were facing the prospect of relitigating nearly every issue in the case.
That shift in litigation risk reshaped the negotiating table. The parties had been talking settlement on and off for years, including more than a dozen meetings before the case was even filed, a day-long session in late 2022 before a magistrate judge, and a mediation ordered by the First Circuit just before oral argument in October 2024. After the appellate decision, those talks intensified, and by the end of March 2026 the parties told the court they had reached an agreement in principle.
The $17 million settlement resolves all claims between the United States, the Commonwealth of Puerto Rico, Ernst Jacob, and SIGCo connected to the Margara grounding. The funds will reimburse the Oil Spill Liability Trust Fund and the Coast Guard's National Pollution Funds Center, cover uncompensated natural resource damages recovered jointly by NOAA and Puerto Rico's environmental agency, and pay outstanding assessment costs to both NOAA and the Commonwealth.
District Judge Gina R. Méndez-Miró approved the agreement as fair, reasonable, and consistent with the goals of the Oil Pollution Act, and ordered that judgment be entered accordingly. For marine insurers and P&I underwriters, the case is a reminder that pollution incidents involving fragile ecosystems like coral reefs can produce eight-figure liabilities that take many years from incident to resolution, and that insurers themselves can be named defendants in the federal government's pursuit of those damages.
