Warren Buffett runs Berkshire Hathaway, a conglomerate overseeing $274.16B in disclosed equity holdings (SEC CIK 0001067983). The latest portfolio (2025Q4) discloses 42 positions across 10 sectors, with the largest positions in AAPL, AXP and BAC. On a mark-to-market basis the tracked portfolio has returned 13.6% over the past year. OpenStocks tracks 40 consecutive quarterly snapshots for this manager — every position change, new entry, and exit is logged below.