Flagstone Financial Management holds a focused book of 77 reported positions worth $447.2M as of Q2 2026 (disclosed Jul 21, 2026, a ~21-day 13F lag). This quarter they opened Applied Materials Inc and trimmed Dimensional Emrg MRKT Core. Their largest long position is Dimensional US Eq MKT ETF at 29% of the reported non-option book. Cloning the disclosed picks since 2024 would be +27% (+13.3%/yr). That is a simulation of the disclosed long book, not audited returns.
Following at the filing date actually beat the quarter-end book by 3.3 points over this window.
Growth of $10,000 cloning Flagstone Financial Management's disclosed long 13F book, rebalanced on each filing date (so it reflects each quarter's actual reporting lag, ~21 days for the latest filing, with no look-ahead), total-return basis (dividends reinvested), derived from end-of-day prices. “Their reported book” values the same picks from quarter-end, before they were public. S&P 500 is SPY total return over the same window. Excludes shorts, cash, options and non-13F holdings. Not investment advice.
Top-heavy: focused book
Share of the disclosed book in its largest positions. A higher top-5 share means a more concentrated, higher-conviction portfolio.
6% mapped to company sectors
+9 sectors below the cut, 1% together
Direct operating-company sectors from our SIC-based security master. ETF/fund and unclassified holdings stay visible separately; this is not ETF look-through exposure.
Estimated $ traded · quarter-end prices (an exit at the prior quarter-end), no cost basis
Other tracked managers holding the same core names as Flagstone Financial Management
| Manager / fund | Shared names | Their $ in those |
|---|---|---|
| Mirae Asset Global Investments Co., Ltd. | 50 / 77 | $276.8B |
| Hoffman, Alan N Investment Management | 8 / 77 | $154.1M |
| 9823 Capital, L.P. | 7 / 77 | $125.9M |
| Luma Capital S.A. - SPF | 8 / 77 | $88.6M |
| Armstrong Henry H Associates Inc | 17 / 77 | $803.3M |
| Prospect Hill Management, LLC | 7 / 77 | $200.2M |
| Retirement Solution LLC | 24 / 77 | $387.0M |
| Marest Capital, LLC | 11 / 77 | $151.7M |
Ranked by the share of each fund's own book sitting in the names it shares with Flagstone Financial Management: only funds sharing at least a tenth of the book qualify. Index giants, bank custody books and market makers are excluded. They hold everything, so their overlap says nothing.
Bars show each position's share of the portfolio. Click a row for its position history.
| # | Security | Value | Shares | % Port | Last move | History |
|---|---|---|---|---|---|---|
| 1 | Dimensional ETF Trust US EQUI MARK ETF | $127.4M | 1.56M | 28.5% | ▲+1.6% Added · +24K sh | |
| 2 | Ishares TR ISHS 5-10YR INVT | $44.8M | 843.5K | 10.0% | ▲+4.2% Added · +34K sh | |
| 3 | SPDR Index SHS FDS ST STR PO EX ETF | $33.4M | 662.9K | 7.5% | ▲+1.8% Added · +12K sh | |
| 4 | SPDR Series Trust ST SHOR CORP ETF | $28.2M | 940.7K | 6.3% | ▲+3.1% Added · +28K sh | |
| 5 | SPDR Series Trust ST INTER ETF | $25.7M | 905.5K | 5.7% | ▲+4.5% Added · +39K sh | |
| 6 | American Centy ETF TR US SML CP VALU | $24.4M | 195.3K | 5.4% | ▲+0.9% Added · +2K sh | |
| 7 | Vanguard Charlotte FDS TOTAL INT BD ETF | $24.0M | 496.4K | 5.4% | ▲+4.3% Added · +20K sh | |
| 8 | Dimensional ETF Trust EMERGING MKTS CO | $19.4M | 477.4K | 4.3% | ▼−2.1% Reduced · −10K sh | |
| 9 | American Centy ETF TR US EQT ETF | $16.9M | 132.2K | 3.8% | ▼−1.9% Reduced · −3K sh | |
| 10 | American Centy ETF TR INTL SMCP VLU | $15.3M | 148.3K | 3.4% | ▲+1.2% Added · +2K sh | |
| 11 | Vanguard Index FDS REAL ESTATE ETF | $11.7M | 120.9K | 2.6% | ▲+3.0% Added · +4K sh | |
| 12 | Pimco ETF TR INTER MUN BD ACT | $9.9M | 187.8K | 2.2% | ▲+13% Added · +22K sh | |
| 13 | American Centy ETF TR AVANTIS EMGMKT | $8.5M | 88.0K | 1.9% | ▼−4.4% Reduced · −4K sh | |
| 14 | Berkshire Hathaway Inc Del CL B NEW | $6.1M | 12.1K | 1.4% | ▼−0.2% Reduced · −22 sh | |
| 15 | American Centy ETF TR INTL EQT ETF | $4.5M | 50.8K | 1.0% | ▼−1.3% Reduced · −645 sh | |
| 16 | Ishares TR NATIONAL MUN ETF | $3.4M | 31.2K | 0.8% | ▲+4.4% Added · +1K sh | |
| 17 | Apple Inc COM | $3.3M | 11.5K | 0.7% | ▼−1.5% Reduced · −173 sh | |
| 18 | Dimensional ETF Trust US SUSTAINABILTY | $2.6M | 55.7K | 0.6% | ▲+3.2% Added · +2K sh | |
| 19 | SPDR Series Trust ST STR PR SP1500 | $2.3M | 25.0K | 0.5% | —Held | |
| 20 | Ishares TR ESG AWRE 1 5 YR | $2.2M | 89.9K | 0.5% | ▲+4.3% Added · +4K sh | |
| 21 | JPMorgan Chase & Co COM | $2.2M | 6.7K | 0.5% | —Held | |
| 22 | Microsoft Corp COM | $1.9M | 5.1K | 0.4% | ▲+0.5% Added · +24 sh | |
| 23 | US Bancorp COM NEW | $1.4M | 23.7K | 0.3% | ▼−3.4% Reduced · −837 sh | |
| 24 | Dimensional ETF Trust US SMALL CAP ETF | $1.4M | 35.4K | 0.3% | ▼−5.0% Reduced · −2K sh | |
| 25 | American Centy ETF TR REAL ESTATE ETF | $1.4M | 29.0K | 0.3% | ▲+0.7% Added · +194 sh | |
| 26 | Dimensional ETF Trust EMGR CRE EQT MNG | $1.3M | 31.4K | 0.3% | —Held | |
| 27 | Nvidia Corporation COM | $1.0M | 5.0K | 0.2% | ▲+0.1% Added · +6 sh | |
| 28 | Alphabet Inc CAP STK CL C | $972K | 2.8K | 0.2% | ▼−6.8% Reduced · −200 sh | |
| 29 | Dimensional ETF Trust GLOBAL SUSTAINA | $901K | 17.3K | 0.2% | ▲+0.9% Added · +162 sh | |
| 30 | Exxon Mobil Corp COM | $893K | 6.5K | 0.2% | ▼−4.2% Reduced · −289 sh | |
| 31 | Wells Fargo & Co COM | $888K | 10.7K | 0.2% | ▲+0.1% Added · +8 sh | |
| 32 | Dimensional ETF Trust INTERNATIONAL | $886K | 19.7K | 0.2% | ▲+2.7% Added · +525 sh | |
| 33 | Ishares TR RUS MID CAP ETF | $863K | 7.8K | 0.2% | —Held | |
| 34 | Vanguard Index FDS TOTAL STK MKT | $765K | 2.1K | 0.2% | ▼−0.9% Reduced · −20 sh | |
| 35 | Vanguard Specialized Funds DIV APP ETF | $755K | 3.2K | 0.2% | —Held | |
| 36 | Berkshire Hathaway Inc Del CL A | $749K | 1 | 0.2% | —Held | |
| 37 | Deere & Co COM | $655K | 1.0K | 0.1% | —Held | |
| 38 | Vanguard Scottsdale FDS INTER TERM TREAS | $626K | 10.6K | 0.1% | —Held | |
| 39 | Amazon Com Inc COM | $610K | 2.6K | 0.1% | ▲+19% Added · +408 sh | |
| 40 | Mastercard Incorporated CL A | $586K | 1.1K | 0.1% | —Held | |
| 41 | Dimensional ETF Trust EMER MARK SU ETF | $564K | 11.5K | 0.1% | ▼−1.4% Reduced · −167 sh | |
| 42 | Markel Group Inc COM | $551K | 282 | 0.1% | ▲+11% Added · +28 sh | |
| 43 | Ishares TR RUSSELL 2000 ETF | $528K | 1.8K | 0.1% | —Held | |
| 44 | Johnson & Johnson COM | $484K | 1.9K | 0.1% | ▼−1.5% Reduced · −30 sh | |
| 45 | Oracle Corp COM | $480K | 3.3K | 0.1% | —Held | |
| 46 | Dimensional ETF Trust US REAL ESTA ETF | $471K | 18.0K | 0.1% | ▼−15% Reduced · −3K sh | |
| 47 | Pepsico Inc COM | $460K | 3.4K | 0.1% | —Held | |
| 48 | Cisco Sys Inc COM | $417K | 3.6K | 0.1% | —Held | |
| 49 | Invesco QQQ TR UNIT SER 1 | $386K | 524 | 0.1% | ▼−2.2% Reduced · −12 sh | |
| 50 | SPDR Series Trust ST INTER BD ETF | $386K | 11.5K | 0.1% | —Held |
This fund page is the Follow view. The Build view lets your agent pull holdings, quarter changes, overlap, and source filings through API or MCP.
curl -H "Authorization: Bearer YOUR_API_KEY" \ "https://arkolith.com/api/v1/funds/1968890/holdings"
Use Arkolith to show Flagstone Financial Management's latest holdings, largest changes, and filing provenance.
As-of date vs the date the SEC received each filing
Reported 13F total per quarter. Raw filing totals can include option notional.
| Quarter | As of | Filed | Lag | Positions | Value | Form |
|---|---|---|---|---|---|---|
| Q2 2026 | Jun 30, 2026 | Jul 21, 2026 | 21d | 77 | $447.2M | 13F-HR |
| Q1 2026 | Mar 31, 2026 | Apr 27, 2026 | 27d | 71 | $402.9M | 13F-HR |
| Q4 2025 | Dec 31, 2025 | Feb 9, 2026 | 40d | 66 | $389.9M | 13F-HR |
| Q3 2025 | Sep 30, 2025 | Oct 31, 2025 | 31d | 62 | $379.0M | 13F-HR |
| Q2 2025 | Jun 30, 2025 | Jul 29, 2025 | 29d | 59 | $348.9M | 13F-HR |
| Q1 2025 | Mar 31, 2025 | Apr 21, 2025 | 21d | 53 | $310.5M | 13F-HR |
| Q4 2024 | Dec 31, 2024 | Jan 24, 2025 | 24d | 54 | $301.0M | 13F-HR |
| Q3 2024 | Sep 30, 2024 | Oct 15, 2024 | 15d | 53 | $298.2M | 13F-HR |
Holdings from SEC EDGAR 13F-HR filings, updated quarterly, filed up to 45 days after quarter-end. Public domain. Book totals and portfolio weights cover reported non-option positions, which can include notes and warrants. Disclosed put/call options are listed separately and excluded from those totals. The performance line is a simulation of the disclosed long book, not an audited return.