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Disclosery

Graham Holdings Co Master Retirement Trust

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13F filer, CIK 1912699, ARLINGTON, VA

Graham Holdings Co Master Retirement Trust reported $706,369,000 across 2 holdings for the quarter ended 2026-03-31, in a 13F-HR filed 2026-05-15.

Filed (acceptance time not in the bulk data set), ingested 13F-HR 0001628280-26-035588

Period
2026-03-31
Reported value
$706M
Holdings
2
Top 10 weight
100%
New
0
Sold out
0

Holdings, Q1 2026

Share positions as resolved from 13F-HR 0001628280-26-035588, largest first. % of portfolio is the value over $706,369,000, the sum of the share positions whose value is usable for ratios (method).

SecurityHistorySharesValue% of portfolioChangeLatest eventTimeline
BRK-ABERKSHIRE HATHAWAY INC DELQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q2: restricted; 2024Q3: 829 shares; 2024Q4: 829 shares; 2025Q1: 829 shares; 2025Q2: 829 shares; 2025Q3: 829 shares; 2025Q4: 829 shares; 2026Q1: 829 shares 829$595M84.28%0Timeline
MKLMARKEL GROUP INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q2: restricted; 2024Q3: 58,008 shares; 2024Q4: 58,008 shares; 2025Q1: 58,008 shares; 2025Q2: 58,008 shares; 2025Q3: 58,008 shares; 2025Q4: 58,008 shares; 2026Q1: 58,008 shares 58,008$111M15.72%0Timeline

How Q1 2026 was built

Available 13F filings of this filer for the quarter and their roles: the base report is the latest original or restatement, NEW HOLDINGS amendments filed after it are added (method).

FilingRoleAmendmentFiledAcceptedIngested
13F-HR 0001628280-26-035588 base2026-05-15acceptance time not in the bulk data set