CNBCยท2025-09-13 12:16Group 1: UnitedHealth Group (UNH) - UnitedHealth Group shares have increased nearly 30% since Berkshire Hathaway disclosed its purchase of over 5 million shares between April 1 and June 30 [2][3] - The stock closed at $271.49 before the SEC filing and ended at $352.51, indicating a significant price increase [2] - Despite the recent gains, UNH is still down 30% year-to-date, and analysts at Morgan Stanley have become incrementally positive after discussions with UNH management [6] Group 2: Berkshire Hathaway's Investment - Berkshire Hathaway's investment in UNH may not be profitable at this point, as the current price is only up 13% from its Q2 close of $311.97 [3][5] - The potential purchase price range for Berkshire's stake varies significantly, with a high of $606.36 per share leading to a $3.1 billion investment, resulting in a 42% loss, while a low of $248.88 would yield a 42% gain [4] - The average purchase price is estimated at $1.9 billion, with the current value around $1.8 billion, indicating an 8% decline from the average [5] Group 3: Kraft Heinz - Kraft Heinz shares fell 4.25% this week following a drop of over 2% last week, as the company plans to split back into two entities, reversing the 2015 merger [9] - Warren Buffett expressed disappointment over the split, despite being the largest shareholder, which raises concerns about potential stock sales [9][10]