The U.S. Supreme Court has issued a ruling that significantly expands the ability of American companies to pursue legal claims against the Cuban government for property seized more than 60 years ago. 

The decision centers on a long-running case brought by ExxonMobil, and its implications extend well beyond a single company. Brokers at Achievements AI examine what the ruling means and why it matters. 

Wait, What Is “Sovereign Immunity” Anyway?

Before getting into the case, it helps to understand the legal idea at its center: sovereign immunity. In simple terms, this is a rule that normally protects foreign governments (and businesses they own) from being sued in U.S. courts. Think of it as a legal force field. Under most circumstances, you can’t drag a foreign government into an American courtroom, even if you think they wronged you.

Cuba’s state-owned companies have been hiding behind that shield for years. The Supreme Court just ruled, by a 6-3 vote, that this shield doesn’t apply in cases like Exxon’s. That’s the headline takeaway, and everything else in this story flows from it.

The Backstory: An Oil Refinery Cuba Never Paid For

Here’s where the story actually begins. Back in 1960, shortly after Fidel Castro took power, Cuba’s government seized a large amount of property owned by foreign companies, including an oil refinery, fuel terminals, and more than 100 service stations belonging to Standard Oil, which eventually became ExxonMobil. Cuba never paid for any of it.

Decades later, Congress passed the Helms-Burton Act in 1996, which gave Americans a legal tool to sue anyone, including Cuban government-owned companies, who continue to profit from property taken this way. Exxon used that law to sue Corporación CIMEX, a Cuban state-owned company accused of using Exxon’s old refinery and stations to keep making money for the Cuban government.

From $71.6 Million to Roughly $3 Billion: How the Math Got So Big

When the U.S. government first calculated the value of what Cuba took from Exxon, back in 1969, it landed on $71.6 million. That might not sound enormous today, but the law allows that number to grow by 6% every year since the seizure. Compounded over more than five decades, that original figure balloons to somewhere around $3 billion  and the law also allows for triple damages in certain situations, which could push the number even higher.

Why This Case Got Stuck for Years  and Why It’s Unstuck Now

If this law has existed since 1996, why is this only happening now? The simple answer: U.S. presidents kept hitting pause on it. The Helms-Burton Act let presidents suspend the lawsuit provision to avoid upsetting allies like Canada and Spain, whose companies also do business in Cuba, and every president did exactly that, for over 20 years.

That changed in 2019, when the suspension was lifted for good. Exxon filed its lawsuit against CIMEX that same day. But even after filing, the case ran into the sovereign immunity wall; lower courts sided with CIMEX, ruling that the shield still applied. 

This week’s Supreme Court decision knocks that wall down and sends the case back to a lower court, where the focus now shifts to whether CIMEX is actually liable and how much it owes.

This Isn’t Just About Exxon

Exxon’s lawsuit is one of approximately 40 similar cases filed since the suspension of the law was lifted, all targeting Cuban entities accused of profiting from confiscated property.

The ruling also follows a related case earlier this year in which major cruise operators   Carnival Corporation & plc, Royal Caribbean Group, and Norwegian Cruise Line Holdings were ordered to pay a combined $440 million for their use of seized Havana harbor facilities.

Taken together, these decisions suggest that the courthouse door is now much wider open for companies and individuals seeking to pursue decades-old Cuban property claims.

The timing also coincides with a tense period in U.S.-Cuba relations, including new murder charges against Cuba’s former president and increased U.S. pressure on Cuba’s fuel supply and energy infrastructure.

What Happens Next

Exxon hasn’t won any money yet; winning the right to sue is very different from winning the case itself.

The dispute now returns to a lower court, where judges will examine the details of CIMEX’s involvement and determine whether the company owes damages and, if so, how much.

For foreign businesses that continue to profit from Cuban properties confiscated during the revolution, the ruling sends a clear message: the legal protections they have relied on for decades may be significantly weaker than previously believed.