Berkshire Hathaway has undergone a major portfolio reshuffle, exiting 16 positions in the first quarter of 2023, including prominent companies like Amazon, Visa, and Mastercard. Under the leadership of new CEO Greg Abel, the conglomerate has made strategic investments, notably a $2.65 billion acquisition in Delta Air Lines, increasing its stake to 6.1%. This move comes as air travel rebounds post-pandemic, although the industry faces challenges from rising fuel costs. Additionally, Berkshire has tripled its investment in Alphabet, the parent company of Google, now valued at $16.6 billion, making it one of its largest stock holdings. The company also disclosed a 3-million-share stake in Macy's, leading to a 6.3% increase in the retailer's stock price. Overall, Berkshire sold $24.09 billion in stocks while purchasing $15.94 billion, indicating a significant shift in its investment strategy. The filing reflects Abel's oversight of 94% of the portfolio, as he aims to navigate the company through changing market dynamics.