Institutional Manager · CIK 0000104889
Graham Holdings Co
Arlington, VA · File #028-22110
Latest AUM
$1.1M
Positions
6
Top-10 Concentration
100.0%
Filings
9
Portfolio Value Over Time
2024-03
2024-06
2024-09
2024-12
2025-03
2025-06
2025-09
2025-12
Biggest QoQ Changes
Ranked by conviction flow (share change × current price) so mark-to-market moves don't dominate. Price effect column shows how much of the $ change was just the stock moving.
| Action | Issuer | Ticker / CUSIP | Δ Shares | Flow ($) | Price Effect |
|---|---|---|---|---|---|
| REDUCE | ALPHABET INC | GOOG | 0 | $0 | +$79,768 |
| REDUCE | BERKSHIRE HATHAWAY INC DEL | BRK-A | 0 | $0 | +$254 |
| REDUCE | BERKSHIRE HATHAWAY INC DEL | BRK-A | 0 | $0 | -$43 |
| REDUCE | CABLE ONE INC | CABO | 0 | $0 | -$11,713 |
| REDUCE | MARKEL GROUP INC | MKL | 0 | $0 | +$13,208 |
| REDUCE | PUBMATIC INC | PUBM | 0 | $0 | +$1,671 |
Sector Allocation
Filing History
- 13F HOLDINGS REPORTQ/E Dec 20256 pos · $1.1M
- 13F HOLDINGS REPORTQ/E Sep 20256 pos · $998,793
- 13F HOLDINGS REPORTQ/E Jun 20255 pos · $889,515
- 13F HOLDINGS REPORTQ/E Mar 20255 pos · $901,059
- 13F HOLDINGS REPORTQ/E Dec 20245 pos · $852,434
- 13F HOLDINGS REPORTQ/E Sep 20245 pos · $825,416
- 13F HOLDINGS REPORTQ/E Jun 20245 pos · $813,444
- 13F HOLDINGS REPORTQ/E Mar 20245 pos · $794,306
- 13F HOLDINGS REPORTQ/E Dec 20235 pos · $665,514
Top 6 Holdings — Dec 2025
| # | Issuer | Ticker | Shares | Value | % of Portfolio |
|---|---|---|---|---|---|
| 1 | ALPHABET INC | GOOG | 1,135,490 | $356,317 | 32.93% |
| 2 | BERKSHIRE HATHAWAY INC DEL | BRK-A | 422 | $318,526 | 29.44% |
| 3 | BERKSHIRE HATHAWAY INC DEL | BRK-A | 481,920 | $242,237 | 22.39% |
| 4 | MARKEL GROUP INC | MKL | 55,430 | $119,155 | 11.01% |
| 5 | PUBMATIC INC | PUBM | 2,831,462 | $25,115 | 2.32% |
| 6 | CABLE ONE INC | CABO | 182,439 | $20,588 | 1.90% |