Leak of Sibur mails about Putin published Russia's largest petrochemical company, Sibur, has long been associated with President Vladimir Putin. His old friend, oligarch Gennady Timchenko, acquired a significant stake in the company in 2011. And his former son-in-law made headlines when it was revealed that, after marrying Putin's daughter, he picked up a 17-percent stake in Sibur that made him a billionaire. Now, for the first time, leaked emails show that the company spent large sums on a villa linked to the president - with top-level employees not even understanding why. The house is a stately mansion on the Gulf of Finland known as Villa Sellgren. In 2016, TV channel Dozhd reported that it had become a vacation destination for Putin. In an independent investigation, opposition leader Alexei Navalny made the same claims, and pointed out that a banner near the villa's entrance identified it as a recreation center for Sibur. He suggested that the Sibur sign was a way of covering up Putin's use of the villa. Villa Sellgren (above). A Sibur banner near the entrance to the villa, highlighted by Alexei Navalny in a 2017 investigation. A leak of emails from the company obtained by OCCRP provides new evidence that his hypothesis was correct. Sibur, it turns out, agreed in 2012 to pay over $1 million per year to rent the villa from its owner, Oleg Rudnov, an old friend of Putin, through a property management company called Nogata. But the petrochemical giant was not actually allowed to use the facilities, and some of its senior executives remained mystified by the arrangement, the emails show (https://bit.ly/3tSoMHb).