Berkshire Hathaway 13F Filing Reveals Warren Buffett's Secret Stock
1. Berkshire initiated a $1.6 billion position in UnitedHealth Group. 2. Smaller cuts were made to Apple and Bank of America holdings. 3. Berkshire also added positions in various firms, boosting their stocks. 4. Berkshire's shares dropped 11% since CEO transition announcement. 5. Stock up nearly 6% since the year's beginning.