Capital One Financial Corp (NYSE:COF) shares are trading higher in Monday's after-hours session after Berkshire Hathaway Inc (NYSE: BRK-A) NYSE:BRK/B) took a stake in the financial services company. 

What Happened: According to a new regulatory filing, Warren Buffett's Berkshire Hathaway purchased 9.922 million shares of Capital One worth close to $1 billion. 

Capital One wasn't the only change in the banking space for Berkshire Hathaway last quarter. The Buffett-led firm also upped its positions in Citigroup Inc (NYSE:C) and Bank Of America Corp (NYSE:BAC), while cutting positions in U.S. Bancorp (NYSE:USB) and Bank Of New York Mellon Corp (NYSE:BK), per CNBC. 

See Also: More Than 700 Banks Face Significant Safety and Soundness Risk Due To Unrealized Losses, Says Federal Reserve Report

COF Price Action: Capital One shares are down more than 24% over the last three months. 

The stock was up 5.25% after hours at $93.80 at the time of writing, according to Benzinga Pro.

Photo: Fortune Live Media from Flickr.