The Motley Foolยท2025-11-17 02:08Core Insights - Warren Buffett will retire as CEO of Berkshire Hathaway at the end of the year, with the company achieving a remarkable 5,502,284% increase in shares from 1965 to 2024, significantly outperforming the S&P 500's 39,054% return [1][2]. Company Summaries Apple - Apple is the largest position in Berkshire's portfolio, accounting for 23.9% of it, with investments starting in 2016 [3][4]. - The company has integrated AI technology into its products, including real-time text analysis and battery management optimization, although it has not developed its own AI models [3][4]. - Apple is reportedly paying Alphabet $1 billion annually to utilize a custom AI model for its Siri assistant, indicating a strategic partnership approach [4][6]. Chubb - Chubb represents 2.5% of Berkshire's portfolio and is known for its innovative use of AI in automating underwriting, claims processing, and fraud detection [7][8]. - The company recently launched an AI-powered optimization engine for personalized insurance recommendations, showcasing its commitment to leveraging technology [8][10]. - Chubb's combined ratio for property and casualty insurance in 2024 was 86.6%, outperforming the industry average of 96.6%, indicating strong profitability [10][11]. Visa - Visa, which constitutes nearly 1% of Berkshire's portfolio, was an early adopter of AI, implementing it in risk and fraud management as early as 1993 [12][13]. - The company's AI platform, Visa Advanced Authorization, prevents approximately $28 billion in fraud annually, highlighting its effectiveness [13][14]. - Visa is also developing AI tools to enhance the online shopping experience, positioning itself as a leader in payment processing alongside Mastercard, which together handle 90% of payment processing outside China [14][15].