Core Viewpoint - Berkshire Hathaway submitted its last 13F holdings report under Warren Buffett's leadership, revealing significant adjustments in its portfolio, including reductions in major tech holdings and a new investment in traditional media [1]. Holdings Summary - The total market value of Berkshire Hathaway's holdings for the fourth quarter was $274 billion, an increase from $267 billion in the previous quarter [2]. - The report indicated one new purchase, four increased positions, and nine reduced positions, with no complete sell-offs [2]. - The top ten holdings accounted for 88.26% of the total market value [2]. Major Holdings - Apple (AAPL) remains the largest holding with approximately 227.9 million shares valued at about $61.96 billion, representing 22.60% of the portfolio, a decrease of 4.32% in share count from the previous quarter [2][3]. - American Express (AXP) is the second-largest holding with around 151.6 million shares valued at approximately $56.09 billion, maintaining the same share count as the previous quarter [2]. - Bank of America (BAC) ranks third with about 517.3 million shares valued at approximately $28.45 billion, reflecting an 8.94% reduction in share count [3]. - Coca-Cola (KO) is fourth with 400 million shares valued at about $27.96 billion, with no change in share count [3]. - Chevron (CVX) is fifth with approximately 130.2 million shares valued at about $19.84 billion, showing an increase of 6.63% in share count [3]. Notable Changes - Berkshire Hathaway significantly reduced its stake in Amazon (AMZN), decreasing its holdings by 77.24% to 2.276 million shares, valued at approximately $530 million, which is 0.19% of the portfolio [4]. - The company initiated a new position in The New York Times (NYT), acquiring 5.067 million shares valued at approximately $352 million, representing 0.13% of the portfolio [4]. - The top five purchases included Chubb Limited, Chevron, The New York Times, Domino's Pizza (DPZ), and Lamar Advertising (LAMR) [5]. - The top five sales included Amazon, Bank of America, DaVita (DVA), Pool Corporation (POOL), and Apple [5].

Core Insights - Citigroup has submitted its 13F holdings report to the SEC for the fourth quarter ending December 31, 2025, indicating a portfolio primarily focused on U.S. stocks and ETFs, with some allocation to options and debt instruments [1][2]. Holdings Summary - The largest holding in Citigroup's portfolio is NVIDIA (NVDA), accounting for 3.04% of the total [1][2]. - The second-largest holding is the SPDR S&P 500 ETF (SPY), representing 2.56% of the portfolio [1][2]. - Microsoft (MSFT) ranks third with a 2.53% allocation [1][2]. - Other significant positions include iShares Russell 2000 Index ETF put options (IWM) at 2.05% and Tesla (TSLA) put options at 2.02% [1][2]. New Positions - Citigroup has added several debt and convertible securities in Q4, including positions in Evercore Energy (EVRG), Snowflake (SNOW), Nutanix (NTNX), Align Technology (ALGN), Mara Holdings (MARA), and IonQ Inc (IONQ), with individual additions generally ranging from 5 million to 13 million shares [3]. - A notable new position is in the energy company Total (TTE), with approximately 6.86 million shares valued at about $448 million, representing 0.20% of the portfolio [3]. Exits and Reductions - Citigroup has completely exited several small-cap and illiquid stocks, primarily in healthcare, consumer discretionary, finance, and industrial sectors, including MHUAF, REVB, KEQU, BYFC, CSWC, RDI, and RAIN, reducing these holdings to zero [4][5]. - The firm has significantly reduced its positions in financial stocks, notably decreasing its stake in Bank of America (BAC) by approximately 29.29 million shares, a reduction of 54.86%, lowering its portfolio share from 1.23% to 0.59% [8][9]. Increases in Holdings - Citigroup has notably increased its holdings in the Consumer Staples ETF (XLP), raising its position by approximately 17.63 million shares, increasing its portfolio share from 0.18% to 0.78% [6][7]. - The firm has also significantly increased its positions in various debt and preferred securities, including Akamai (AKAM), JD.com (JD), CMS Energy (CMS), JetBlue Airways (JBLU), and others, with increases generally in the range of 7 million to 12 million shares [6][7]. Summary of Changes - Citigroup has made substantial reductions in options positions, including a 42.31% decrease in iShares iBoxx High Yield Bond ETF put options (HYG) and a reduction of over 90% in the industrial sector ETF put options (XLI) [8][9].