Flagstone Financial Management reported 37 positions worth $29.00M for the quarter ended Jun 30, 2026, up 12.9% on the prior quarter. It opened 6 new positions, added to 7, trimmed 7 and exited 0. Its largest holding is Berkshire Hathaway Inc at 20.9% of the portfolio.
Reported 13F market value at each quarter end. A change mixes trading with price moves in the positions held.
Dollar value of shares bought and sold each quarter, at that quarter’s price. It counts trading only, not price changes.
How many positions were opened, added to, trimmed or closed each quarter.
Share of reported value in each sector at every quarter end.
| Holding | Change | Change % | Trade Value | Weight |
|---|---|---|---|---|
| AMAT Applied Materials Inc | +499 | – | $360.78K | 1.24% |
| STX Seagate Technology Holdings plc | +365 | – | $352.23K | 1.21% |
| PANW Palo Alto Networks Inc | +670 | – | $228.48K | 0.788% |
| V Visa Inc. | +646 | – | $221.70K | 0.765% |
| D Dominion Energy, Inc | +3,200 | – | $218.53K | 0.754% |
| CAT Caterpillar Inc | +200 | – | $212.98K | 0.734% |
| AMZN Amazon Com Inc | +408 | +19.0% | $97.24K | 2.1% |
| MKL Markel Group Inc. | +28 | +11.0% | $54.68K | 1.9% |
| MSFT Microsoft Corp | +24 | +0.5% | $8.95K | 6.56% |
| BOC BOSTON OMAHA Corp | +560 | +2.3% | $7.64K | 1.17% |
| Holding | Change | Change % | Trade Value | Weight |
|---|---|---|---|---|
| GOOG Alphabet Inc. | -200 | -6.8% | $70.66K | 3.35% |
| USB Us Bancorp De | -837 | -3.4% | $50.55K | 4.93% |
| AAPL Apple Inc. | -173 | -1.5% | $50.06K | 11.46% |
| XOM ExxonMobil Holdings Corp | -289 | -4.2% | $39.51K | 3.08% |
| BRK-B Berkshire Hathaway Inc | -22 | -0.2% | $11.01K | 20.87% |
| ETN Eaton Corp plc | -25 | -3.8% | $10.65K | 0.939% |
| JNJ Johnson & Johnson | -30 | -1.5% | $7.62K | 1.67% |
| Holding | Shares | Trade Value | Weight |
|---|---|---|---|
| AMAT Applied Materials Inc | +499 | $360.78K | 1.24% |
| STX Seagate Technology Holdings plc | +365 | $352.23K | 1.21% |
| PANW Palo Alto Networks Inc | +670 | $228.48K | 0.788% |
| V Visa Inc. | +646 | $221.70K | 0.765% |
| D Dominion Energy, Inc | +3,200 | $218.53K | 0.754% |
| CAT Caterpillar Inc | +200 | $212.98K | 0.734% |
No positions were closed this quarter.
| # | Activity | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| 1 | BRK-B Berkshire Hathaway Inc | Financial Services | 12.1K | $6.05M | 20.87% | -22 | -0.2% | Reduced | 0% |
| 2 | AAPL Apple Inc. | Technology | 11.5K | $3.32M | 11.46% | -173 | -1.5% | Reduced | 0% |
| 3 | JPM Jpmorgan Chase & Co | Financial Services | 6,694 | $2.19M | 7.56% | 0 | 0.0% | Unchanged | 0% |
| 4 | MSFT Microsoft Corp | Technology | 5,100 | $1.90M | 6.56% | +24 | +0.5% | Added | 0% |
| 5 | USB Us Bancorp De | Financial Services | 23.7K | $1.43M | 4.93% | -837 | -3.4% | Reduced | 0% |
| 6 | NVDA Nvidia Corp | Technology | 5,043 | $1.01M | 3.48% | +6 | +0.1% | Added | 0% |
| 7 | GOOG Alphabet Inc. | Technology | 2,752 | $972.23K | 3.35% | -200 | -6.8% | Reduced | 0% |
| 8 | XOM ExxonMobil Holdings Corp | Energy | 6,531 | $892.87K | 3.08% | -289 | -4.2% | Reduced | 0% |
| 9 | WFC Wells Fargo & Company | Financial Services | 10.7K | $888.08K | 3.06% | +8 | +0.1% | Added | 0% |
| 10 | BRK-A Berkshire Hathaway Inc | Financial Services | 1 | $748.85K | 2.58% | 0 | 0.0% | Unchanged | 0% |
| 11 | DE Deere & Co | Industrials | 1,032 | $654.73K | 2.26% | 0 | 0.0% | Unchanged | 0% |
| 12 | AMZN Amazon Com Inc | Consumer Discretionary | 2,558 | $609.67K | 2.1% | +408 | +19.0% | Added | 0% |
| 13 | MA Mastercard Inc | Financial Services | 1,140 | $585.51K | 2.02% | 0 | 0.0% | Unchanged | 0% |
| 14 | MKL Markel Group Inc. | Financial Services | 282 | $550.75K | 1.9% | +28 | +11.0% | Added | 0% |
| 15 | JNJ Johnson & Johnson | Healthcare | 1,906 | $484.05K | 1.67% | -30 | -1.5% | Reduced | 0% |
Tip. Select a row to see that position’s full history at Flagstone Financial Management.
As of its Q2 2026 13F filing, Flagstone Financial Management’s five largest positions were Berkshire Hathaway Inc (BRK-B) at 20.9%, Apple Inc. (AAPL) at 11.5%, Jpmorgan Chase & Co (JPM) at 7.6%, Microsoft Corp (MSFT) at 6.6%, Us Bancorp De (USB) at 4.9% of the reported portfolio.
Flagstone Financial Management reported a 13F portfolio worth $29.00M across 37 positions for Q2 2026. That is up 12.9% from the previous quarter.
Its largest purchases by value were Applied Materials Inc ($360.78K), Seagate Technology Holdings plc ($352.23K), Palo Alto Networks Inc ($228.48K). It opened 6 new positions.
Its largest sales by value were Alphabet Inc. ($70.66K), Us Bancorp De ($50.55K), Apple Inc. ($50.06K). It exited 0 positions entirely.
From the Form 13F-HR reports Flagstone Financial Management files with the SEC each quarter, within 45 days of quarter end. A 13F lists long positions in US-listed equities and options; it excludes short positions, cash, bonds and most non-US holdings.
13F data reflects long positions in US-listed equities and options as reported to the SEC up to 45 days after quarter end. It excludes short positions, cash, bonds and most non-US securities, so it is not a complete picture of a manager’s assets.