Graham Holdings Co Master Retirement Trust reported BERKSHIRE HATHAWAY INC DEL (BRK/A) in 19 quarterly 13F filings from 2024 Q2 through 2026 Q2. Peak portfolio weight reached 86.3% in 2024 Q3. The latest visible filing shows BRK/A at 84.57% of the fund.
This page tracks quarterly shares, estimated market value, portfolio weight, filing dates, and disclosure-aligned stock prices directly from SEC EDGAR 13F filings. Older history is available after unlock; the visible window still shows the most recent pattern.
This page is designed to answer the real investor question behind a 13F filing: how meaningful was Graham Holdings Co Master Retirement Trust's position in BERKSHIRE HATHAWAY INC DEL, and how did that conviction change over time? You can read the holding window, peak weight, latest reported size, disclosure timing, and quarter-by-quarter changes without piecing the story together from raw SEC rows.
BRK/A was reported at 84.57% of portfolio in the most recent visible filing.
Peak weight helps separate a token disclosure from a real conviction holding the fund genuinely cared about.
Longer holding windows often tell a very different story from short-lived tactical trades or one-quarter experiments.
Knowing that a fund owned a stock is useful. Knowing whether it was a 0.20% placeholder or a true high-conviction position is where the signal actually starts.
As of 2026 Q3 — sorted by position size
These are the practical questions this page is built to answer before you even open the full history table.
Graham Holdings Co Master Retirement Trust reported BRK/A across 9 quarterly 13F filings, from 2024 Q2 through 2026 Q2.
The largest reported portfolio weight for BRK/A was 86.30% in 2024 Q3.
The most recent filing on this page is 2026 Q2, when Graham Holdings Co Master Retirement Trust reported 829 shares, equal to 84.57% of portfolio, with an estimated market value of $621K.
The chart compares Graham Holdings Co Master Retirement Trust's quarterly BRK/A portfolio weight with the stock's indexed share price, so you can see whether the fund was building, trimming, or holding the position as price moved.