Berkshire Hathaway

Berkshire Hathaway's 13F-HR is the single most-watched institutional disclosure on Wall Street. Warren Buffett and the late Charlie Munger built the equity book over six decades into a concentrated, slow-rotating portfolio of compounding businesses - Apple, Bank of America, American Express, Coca-Cola, Chevron, Occidental - held alongside Berkshire's operating subsidiaries (GEICO, BNSF, Berkshire Hathaway Energy, Precision Castparts) and a cash pile that has crossed $300 billion as of 2025. The combined entity manages assets equivalent to a mid-sized national economy.

The 13F book itself is unusual among institutional disclosures because it telegraphs a coherent investing philosophy rather than a tactical bet. Berkshire holds positions for years to decades, trims rather than exits, and concentrates the book in a small number of high-conviction names - typically 40-50 positions versus the multi-hundred-position books of multi-strategy peers. The presence of cash equivalents at >25% of the equity book signals Buffett's view on overall market valuation: when the cash share grows, opportunities are scarce; when it shrinks, deployment opportunities have appeared.

The retail trader reading Berkshire's 13F has two distinct signals to extract. First, the directional one - when Berkshire enters or exits a position, the position size and trajectory matter because the holding period implies a multi-year thesis (the OXY accumulation 2022-2024, the BAC stake since the 2011 preferred-stock injection). Second, the meta-signal: when Berkshire is trimming AAPL aggressively (which it did through 2024), it's a statement about overall equity valuation, not a stock-specific call. Both signals are slow-moving, which is the point.