The Omaha-based conglomerate bought more than 5 million shares in the healthcare firm for a stake worth about $1.6 billion at the end of June.

The Omaha-based conglomerate bought more than 5 million shares in the healthcare firm for a stake worth about $1.6 billion at the end of June.

Burry's Scion Asset Management owned call contracts against 350,000 shares of UnitedHealth, with unknown value, strike price or expiry, according to the filing.