Three stocks are 52% of Berkshire's $299bn U.S. portfolio
Berkshire Hathaway's U.S. stock portfolio as it reports it to the SEC every quarter on Form 13F, from the first quarter of 2013. The eight largest positions in the latest filing are drawn for every quarter at their quarter-end market value, with everything else combined, so a reader can see when each stake was built and how far it has grown or shrunk.
What does it show?
Berkshire's reported U.S. stock portfolio grew from $85.0bn in 2013 Q1 to $299bn in 2026 Q2. Apple, first reported in 2016 Q1, is now its largest holding at $66.0bn, and the eight largest positions are 85% of the total.
Methodology
Every Form 13F-HR information table Berkshire Hathaway (CIK 1067983) has filed for the quarters 2013 Q1 to 2026 Q2, read from SEC EDGAR. Berkshire files one combined report for itself and its subsidiaries, one row per security for each group of managers sharing discretion, so rows are summed by CUSIP and share classes of one company (Alphabet's A and C shares, Lennar's A and B) are combined under one name. Values are the filed quarter-end market values: in thousands of dollars before the SEC's 2023 rule change (filings from January 3, 2023 report dollars) and converted here, checked against the implied price per share and the summary page's total. Amendments are applied in filing order: a restatement replaces a quarter's table and a new-holdings amendment adds to it. Positions Berkshire first kept confidential and disclosed in a later amendment are included in the quarter they were held: 2013 Q2 (Exxon Mobil, filed 2013-11-14); 2014 Q3 (Deere, filed 2015-02-17); 2015 Q2 (Phillips 66, filed 2015-09-04); 2020 Q3 (Chevron, Marsh & McLennan, Verizon, filed 2021-02-16); 2023 Q3 (Chubb, filed 2024-05-15); 2023 Q4 (Chubb, filed 2024-05-15); 2025 Q1 (D.R. Horton, Lennar, Nucor, filed 2025-08-14). The eight series are the eight largest positions in 2026 Q2, drawn for every quarter (zero when not held); 'All other holdings' is everything else in the same filings. A 13F covers only U.S.-listed securities on the SEC's 13(f) list, long positions only: Berkshire's Japanese trading houses, BYD and other foreign holdings are not in it, while stakes it accounts for by the equity method (Kraft Heinz, Occidental Petroleum's common) are. The values are market values at each quarter end, so they move with prices as well as with buying and selling.