The latest 13F from Berkshire Hathaway shows a characteristically concentrated — but unusually active — quarter for Warren Buffett. While Berkshire trimmed several long-held positions earlier in 2025, this filing reveals where capital actually flowed in. Much of the activity reflects classic Buffett behavior: doubling down on durable franchises, opportunistic value investing, and selectively adding to high-conviction compounders.Below is a breakdown of the most important net purchases visible in the filing. ...

Artificial intelligence skepticism was growing even before legendary hedge fund manager Michael Burry, a contrarian, decided to kick a hornet's nest. First, many experts have admitted that AI is a bubble, but as a consolation, we get the opinion that it is different from the dot-com bubble, or, in the case of a former Intel CEO Pat Gelsinger, that it will take years to burst. Bank of America analysts usually point out that there will be no overbuilding of AI data centers, due to practical limitations suc ...

Core Opinion - There is a growing belief that shorting the entire AI sector may be a viable strategy due to the lack of monetization and sustainability in the business model, as most users do not pay for AI services [1][3][18] Industry Insights - The AI sector is characterized by significant investments, with trillions of dollars spent on infrastructure, data centers, and training models, yet the majority of users are not paying customers [3][4][19] - Companies that build specialized AI tools for specific industries, such as law, healthcare, and logistics, are seen as having better monetization potential compared to foundational AI builders [2][14] - A McKinsey study supports the notion that future AI monetization will rely on targeted, value-based services rather than broad, free offerings [2] Market Concerns - The current state of the AI market resembles a bubble, with hedge funds and analysts expressing concerns over inflated valuations, particularly in companies like Nvidia [3][7] - Reports indicate that AI monetization is still in its early stages, with consumer AI struggling to find sustainable revenue models and high infrastructure costs [3][19] - The prevailing business model of offering AI services for free is unsustainable, as historical precedents show that successful businesses typically require a substantial number of paying customers [5][18] Future Projections - The potential for an AI collapse is highlighted, as the inability to charge for AI services could lead to significant financial challenges for companies in the sector [18][20] - Companies that can adapt AI applications for specific business needs and charge for those services are projected to be more successful in the long run [14][19]

Core Viewpoint - Despite a 33% decline in the past year, SentinelOne (NYSE: S) is not considered a buy at this time, although there are positive trends in Purple AI monetization and platform consolidation [1]. Company Analysis - SentinelOne has experienced a significant drop of approximately 33% in its stock price over the past year [1]. - The company shows encouraging signals regarding platform consolidation and cash management, which may indicate potential for future growth [1]. Industry Trends - There is a notable interest in AI monetization trends within the industry, particularly related to Purple AI, which could influence investment decisions [1].

Core Viewpoint - Despite a 33% decline in the past year, SentinelOne (NYSE: S) is not considered a buy at this time, although there are positive trends in Purple AI monetization and platform consolidation [1]. Company Analysis - SentinelOne has experienced a significant drop of approximately 33% in its stock price over the past year [1]. - The company shows encouraging signals regarding platform consolidation and cash management, which may indicate potential for future growth [1]. Industry Trends - There is a notable interest in AI monetization trends within the industry, particularly related to Purple AI, which could influence investment decisions [1].

Core Insights - Salesforce has projected a revenue target of $60 billion by fiscal 2030, which has generated optimism regarding the company's AI-monetization strategy [1] Group 1 - The revenue guidance of $60 billion reflects the company's confidence in its growth trajectory and the potential of its AI initiatives [1]

Summary of Key Points from the Conference Call Industry Overview - The focus is on the **AI ecosystem**, which is becoming increasingly circular with suppliers funding customers and sharing revenue. This circularity raises the need for more sufficient disclosure to understand these relationships [1][3][7]. Core Insights - **Investor Attention**: There is growing investor interest in the interconnected relationships among AI players, particularly regarding Remaining Performance Obligations (RPO) and the need for more transparency [3][11]. - **OpenAI's Role**: OpenAI (OAI) is highlighted as a significant player, accounting for approximately **2/3 of RPO at Oracle (ORCL)** and **40% at CRWV**. This concentration means the success of these companies increasingly depends on OpenAI's performance [4][7][31]. - **Funding and Revenue Streams**: The report discusses sources of funding for hyperscalers, with purchase and lease commitments surging to **$330 billion** and **$340 billion**, respectively. This indicates a strong reliance on AI-generated revenues to support these investments [7][37]. Financial Dynamics - **Complex Transactions**: The complexity of transactions within the AI ecosystem complicates the evaluation of demand and increases risks associated with AI's success. The sustainability of the current investment cycle hinges on AI generating durable cash flows [4][18]. - **RPO Trends**: As of **2Q25**, contracted revenue across MSFT, ORCL, and CRWV is becoming more concentrated, with OpenAI contracts driving a significant portion of RPO growth [26][30]. - **Capex and Lease Commitments**: Hyperscalers are entering into substantial purchase commitments to secure supply for capacity build-out, with lease commitments also increasing significantly [37][40]. Risks and Opportunities - **Customer Concentration Risks**: The heavy reliance on a few key customers, particularly OpenAI, amplifies counterparty payment risks and could impact top-line growth if AI monetization efforts falter [18][32]. - **Need for Enhanced Disclosures**: There is a call for more robust disclosures regarding customer concentration, vendor financing, and revenue-sharing agreements to help investors assess risks and rewards effectively [44][45]. Future Projections - **AI Revenue Potential**: Morgan Stanley Research projects that AI could drive a **$1.1 trillion revenue opportunity by 2028**, with significant contributions from both enterprise and consumer sectors [52][53]. - **Investment Gaps**: A financing gap of **$1.5 trillion** is anticipated for global data centers through 2028, indicating a need for external capital to meet growing capex demands [49][51]. Conclusion - The AI ecosystem is characterized by intricate financial relationships and dependencies, particularly on key players like OpenAI. Investors are urged to seek greater transparency to navigate the associated risks and opportunities effectively [11][44].

Core Insights - The current landscape of AI investment is characterized by a dichotomy between companies like Nvidia, which is generating substantial revenue from AI, and Oracle, which has inflated expectations due to future contracts that have yet to materialize [1][7][39] - A significant portion of corporate generative AI projects are not yet profitable, challenging the market's trillion-dollar expectations [2] - The debate centers around whether the AI sector is experiencing a genuine boom or is on the verge of a bubble, with differing perspectives on the sustainability of growth and monetization [7][10][39] Company Performance - Nvidia reported record data-center revenue of $46.7 billion in Q2 2025, indicating strong current performance in AI monetization [1] - Oracle's revenue surge is largely attributed to a reported five-year, $300 billion deal with OpenAI that does not commence until 2027, raising questions about the sustainability of its growth [1] - The performance of chipmakers and cloud service providers is currently strong, with significant cash flow being generated, contrasting with the slower monetization seen in other areas of AI [8][22] Market Dynamics - Investors are optimistic about sustained double-digit growth in AI demand, particularly for cloud services and high-bandwidth memory, with backlogs being treated almost like cash [11][39] - The market is experiencing a concentration of investment in a few leading companies, which can lead to volatility in stock prices based on guidance from these firms [12][27] - The current phase is marked by scrutiny of costs and governance, with enterprises evaluating the total cost of ownership and the effectiveness of AI implementations [17][29] Economic Factors - The AI sector is witnessing a significant increase in capital expenditures, but there is concern about whether this will translate into timely revenue generation [26][31] - The cost of AI infrastructure is decreasing due to advancements in technology, which could support broader adoption and profitability [24][40] - Power supply and policy regulations are emerging as critical factors that could impact the pace of AI deployment and revenue recognition [29][30] Future Outlook - The future of AI investment hinges on the ability to convert capital expenditures into revenue effectively, with a focus on usage and pricing power [32][34] - Key indicators to watch include hyperscaler and chip earnings, which will reveal whether AI growth is sustainable and if capital expenditures need to be adjusted [37][38] - The ongoing debate about whether the AI sector is in a boom or bubble will ultimately depend on the conversion of backlogs into revenue and the management of costs and expectations [39][40]

Core Insights - HubSpot (NYSE: HUBS) is positioned for robust growth, supported by a shift to seat-based pricing and AI monetization [1] - The investment approach emphasizes understanding core business economics, including competitive moat, unit economics, reinvestment runway, and management quality [1] - The focus is on sectors with strong secular tailwinds, aiming to identify businesses that can scale and generate long-term free cash flow [1] Company Analysis - HubSpot's recent updates from INBOUND 2025 reinforce its growth potential [1] - The company is viewed as having the ability to unlock significant terminal value over time [1] - The analysis is driven by fundamental research, aiming to highlight what truly drives long-term equity value [1]

Core Insights - HubSpot (NYSE: HUBS) is positioned for robust growth, supported by a shift to seat-based pricing and AI monetization [1] - The investment approach emphasizes understanding core business economics, including competitive moat, unit economics, reinvestment runway, and management quality [1] - The focus is on sectors with strong secular tailwinds, aiming to identify businesses that can scale and generate long-term free cash flow [1] Company Analysis - HubSpot's recent updates from INBOUND 2025 reinforce its growth potential [1] - The company is seen as having the ability to unlock significant terminal value over time [1] - The analysis is driven by fundamental research, aiming to highlight what truly drives long-term equity value [1]