This post has been updated to reflect that neither Putin nor his daughters are listed as partners of a company that owns a Biarritz home where Igor Stravinsky once lived.

The Biden administration is going after the children of Russia’s oligarchs.

Among those sanctioned in recent days were the wealthy sons of Putin’s former judo sparring partner; the son of the Kremlin chief of staff; and the brother and sister whose dad runs the Kremlin-backed Wagner mercenary group.

“The aid of these individuals, their family members, and other key elites allows President Vladimir Putin to continue to wage the ongoing, unprovoked invasion of Ukraine,” the White House said.

But one pair of names is absent from the list: Katerina Tikhonova and Maria Vorontsova. These are the adult daughters of Vladimir Putin.

If the Biden administration is going after the children of the oligarchs, aren’t the children of Putin fair game?

Putin has always been extremely protective of his daughters. “I never discuss my family with anyone,” Putin said in 2015. It’s taken years just to learn the most basic facts about them.

Katerina, a dancer-turned-mathematician, and Maria, a pediatric endocrinologist, have stayed out of the spotlight and taken on different surnames to obscure their connection to the most powerful man in Russia. At the same time, they have reaped the benefits of the corrupt system that keeps their father in power.

Katerina and her former husband, Kirill Shamalov, amassed a corporate portfolio reportedly worth $2 billion before their divorce in 2018. (Shamalov was sanctioned by the US Treasury in 2018; the UK sanctioned him February 24.)

An investigation by Alexei Navalny’s Anti-Corruption Foundation found Katerina headed a foundation that developed lands owned by Moscow State University. Her foundation, Innopraktika, collected $7.8 million from Russian-state owned companies and $7.3 million from unknown sources in 2015-2016.

Her older sister Maria also lived a life of luxury. Photos on social media showed her traveling the world, riding on expensive yachts, and hiring teachers abroad, according to an investigation by the Russian publication New Times.

Maria married a Dutch citizen named Jorrit Faassen, who worked at subsidiary of Gazprom. In 2010, while driving in Moscow, Faassen got into a confrontation with bodyguards of a Russian banker. Seven bodyguards forced Faassen’s BMW to stop, beat him with baseball bats, and damaged his car. The banker, Matvey Urin, had fucked with the wrong person. Faassen, described in media reports as a Putin family friend, remembered the license plate numbers of the bodyguards that attacked him. The next day, police arrested the businessman and the bodyguards. Weapons and drugs were found in their vehicles. Urin was sentenced to prison and his banks went out of business.

There are rumors that Putin had a “secret” third daughter with a cleaning woman-turned-multimillionaire, but Putin has never acknowledged the girl as his child.

Sanctioning the daughters would put Putin family assets in the West under the reach of sanctions.

One place to go looking for Putin’s assets in the West is in the French town of Biarritz, 15 miles up the coast from the Spanish border. This seaside resort town holds a special place in the hearts of the Putin family. In the summer of 1999, Putin was vacationing in Biarritz with his wife and daughters when he learned that President Yeltsin had anointed him as his chosen successor.

According to a report published February 26 by the French radio station Europe 1, Putin purchased a home on Rue de la Fregate in Biarritz where the Russian composer Igor Stravinsky once lived. Putin reportedly paid around $400,000 for the home in 1996, at which time he worked in the St. Petersburg mayor’s office on a pittance salary. The radio station says the French secret services confirmed the report. Europe 1 says the property is held in the name of one of Putin’s daughters.

Update: I spoke with Michael Anthony, who is listed as an officer of SCI Chalet les Rochers, the French company that controls the property on Rue de la Fregate. Anthony heads Anthony & Cie, a private wealth management advisory firm in France that serves ultra-wealthy clients. Anthony checked his records and tells me that neither Putin nor his daughters are partners of SCI Chalet les Rochers. He declined to name the listed partner(s), citing client confidentiality.

Katerina and her ex-husband, Kirill Shamalov, owned a different home in Biarritz. The seaside house was acquired for 4.5 million Euros in 2012 from one of Putin’s old friends, Gennady Timchenko. It’s not clear who owns the house on Avenue du General MacCroskey today. The French company that owns the house is in turn owned by a Monaco company, SCP Alta Maria, whose beneficiaries cannot be revealed, even on request.

Lyudmila Putin, Katerina’s and Maria’s mother, also spends time in Biarritz. Lyudmila was married to Putin for three decades before they divorced in 2013.

Putin’s ex-wife has come almost every year to Biarritz to “take the waters,” both before and after her divorce, Alexandre de Miller de La Cerda, Russia’s honorary consul in Biarritz, told TIME. “She stops either at the Miramar” – one of the town’s most luxurious hotels – “or in the house that belongs to our mutual friend from Putin’s St. Petersburg circle.”

Lyudmila acquired a $7.46 million home in Anglet, next to Biarritz, six months after divorcing Putin, OCCRP reported. The Anglet home is in the name of her second husband, a St. Petersburg businessman almost 20 years her junior. In recent days, the gate of the Anglet home was marred with graffiti reading ‘Putin suka!’ (a vulgar insult in Russian), ‘Putin’s mafia’ or ‘Slava Ukraíne’ (Glory to Ukraine).

Meanwhile, the US Treasury keeps noting how the Russians it is sanctioning are close to Putin’s daughters. Kirill Dimitriev, the head of Russia’s sovereign wealth fund who was sanctioned last week is close to Katerina and her ex-husband, the US Treasury noted in its release. It’s clear that being close to Putin’s daughters is part of being in the inner, inner Kremlin circle.

So why sanction the oligarchs’ children, and not Putin’s daughters? Is the US worried that it will be too much of a provocation for an already unstable man?