In the fall of 2010, the Russian billionaire investor Yuri Milner took the stage for a Q. and A. at a technology conference in San Francisco. Mr. Milner, whose holdings have included major stakes in Facebook and Twitter, is known for expounding on everything from the future of social media to the frontiers of space travel. But when someone asked a question that had swirled around his Silicon Valley ascent — Who were his investors? — he did not answer, turning repeatedly to the moderator with a look of incomprehension. Now, leaked documents examined by The New York Times offer a partial answer: Behind Mr. Milner’s investments in Facebook and Twitter were hundreds of millions of dollars from the Kremlin. Obscured by a maze of offshore shell companies, the Twitter investment was backed by VTB, a Russian state-controlled bank often used for politically strategic deals. And a big investor in Mr. Milner’s Facebook deal received financing from Gazprom Investholding, another government-controlled financial institution, according to the documents. They include a cache of records from the Bermuda law firm Appleby that were obtained by the German newspaper Süddeutsche Zeitung and reviewed by The Times in collaboration with the International Consortium of Investigative Journalists.
Ultimately, Mr. Milner’s companies came to own more than 8 percent of Facebook and 5 percent of Twitter, helping earn him a place on various lists of the world’s most powerful business people. His companies sold those holdings several years ago, but he retains investments in several other large technology companies and continues to make new deals. Among Mr. Milner’s current investments is a real estate venture founded and partly owned by Jared Kushner, President Trump’s son-in-law and White House adviser.
Facebook, Twitter and other social media sites have become a major focus of federal investigations into Kremlin interference in the 2016 election. Federal prosecutors and congressional investigators are examining how Russians linked to the Kremlin turned the sites into garden hoses of bogus news stories and divisive political ads, and whether they coordinated with the Trump campaign.