Soros Fund Management LLC, the family office that oversees $24 billion, bought Morgan Stanley and added to its holdings of Citigroup Inc. and JPMorgan Chase & Co. in the fourth quarter, according to a regulatory filing.

Billionaire George Soros’s firm bought 4.1 million shares of Morgan Stanley, valued at $79 million as of Dec. 31, a filing with the Securities and Exchange Commission shows. The firm added 6.6 million shares of Citigroup, bringing the value of its stake to $321 million. It added 1.6 million shares of JPMorgan, increasing the position’s value to $113 million.