Methodology13F filings report quarter-end positions, not trade fills. Estimated entry prices reconstruct rolling cost basis from share changes and Yahoo quarter-average closes. Performance is a derived prior-book return, not licensed fund NAV. Options and unresolved CUSIPs are excluded from estimates.

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Frequently asked questions

What did Berkshire Hathaway hold in Mar 31, 2025?

Berkshire Hathaway reported 4 long holdings for Mar 31, 2025 in its 13F filing on Insider Deck.

What did Berkshire Hathaway buy last quarter?

Open the trades lens on the Berkshire Hathaway filing for Mar 31, 2025 to see adds, trims, new positions, and exits versus the prior report.

What is Berkshire Hathaway's largest position?

In the Mar 31, 2025 filing, one of the largest reported positions is NUCOR CORP.