The Motley Foolยท2025-07-11 07:51Core Insights - Warren Buffett's Berkshire Hathaway has a "secret" portfolio worth $616 million, which includes stakes in two quantum computing companies [6][10][11] - The portfolio is managed by New England Asset Management (NEAM), which operates under Berkshire Hathaway but is not directly overseen by Buffett [8][9] - The quantum computing sector is seen as a potential game-changer, with applications in drug development, financial risk management, and enhancing AI algorithms [13] Group 1: Berkshire Hathaway's Performance - Berkshire Hathaway has achieved a cumulative return of 5,789,503% on its Class A shares since Buffett became CEO, significantly outperforming the S&P 500's 41,400% return over the same period [2][3] - The company's primary investment portfolio was valued at $292.3 billion as of July 7 [8] Group 2: New England Asset Management - NEAM closed the March-ended quarter with $616 million in assets under management, allowing for tracking of its buying and selling activities similar to Berkshire's primary portfolio [10] - The portfolio includes diversified ETFs and well-known companies, alongside investments in quantum computing [11] Group 3: Quantum Computing Investments - NEAM holds shares in Alphabet (5,195 shares) and Microsoft (4,530 shares), both of which are key players in the quantum computing field [15][21] - Alphabet's Willow chip has shown the ability to perform complex calculations significantly faster than traditional supercomputers, although it is not yet commercialized [19][20] - Microsoft is integrating its Majorana 1 quantum processing unit with Azure Quantum, aiming to enhance research capabilities and solve complex problems [24][25]