Maseco LLP holds a focused book of 391 stocks worth $3.2B as of Q1 2026 (disclosed Apr 21, 2026, a ~45-day 13F lag). This quarter they opened Avantis U.S. Equity ETF and trimmed Dimensional US Marketwide Va. Their largest long position is Dimensional US Eq MKT ETF at 17% of the equity book.
The public view is the crawlable proof. The same sourced dataset is available through REST and MCP for agents, research scripts, and back-office tools.
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/2074052/holdings"
Use Arkolith to show MASECO LLP's latest holdings, largest changes, and filing provenance.
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.
1% mapped to company sectors
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, no cost basis
Bars show each stock's share of the portfolio. Click a row for its position history.
| # | Security | Value | Shares | % Port | Last move | History |
|---|---|---|---|---|---|---|
| 1 | Dimensional ETF Trust US EQUITY MARKET | $530.9M | 7.49M | 16.6% | ▲+0.3% Added · +26K sh | |
| 2 | Vanguard Scottsdale FDS INTER TERM TREAS | $386.5M | 6.49M | 12.1% | ▲+5.8% Added · +358K sh | |
| 3 | American Centy ETF TR US EQT ETF | $259.9M | 2.34M | 8.1% | ▲New New position | |
| 4 | Dimensional ETF Trust GLOBAL CORE PLUS | $207.9M | 3.85M | 6.5% | ▲+14% Added · +462K sh | |
| 5 | American Centy ETF TR INTL EQT ETF | $166.2M | 1.96M | 5.2% | ▲New New position | |
| 6 | Dimensional ETF Trust INTL CORE EQUITY | $112.6M | 3.17M | 3.5% | ▲+10% Added · +290K sh | |
| 7 | Dimensional ETF Trust US MKTWIDE VALUE | $97.9M | 2.02M | 3.1% | ▼−0.6% Reduced · −11K sh | |
| 8 | Dimensional ETF Trust GLOBAL SUSTAINA | $96.0M | 1.86M | 3.0% | ▲+8.2% Added · +141K sh | |
| 9 | American Centy ETF TR AVANTIS RESPON U | $95.6M | 1.29M | 3.0% | ▲New New position | |
| 10 | American Centy ETF TR AVANTIS EMGMKT | $93.5M | 1.16M | 2.9% | ▲New New position | |
| 11 | American Centy ETF TR AVANTIS SHFXDINC | $91.6M | 1.96M | 2.9% | ▲New New position | |
| 12 | Dimensional ETF Trust INTL CORE EQT MK | $88.3M | 2.27M | 2.8% | ▲+9.7% Added · +200K sh | |
| 13 | Dimensional ETF Trust US SUSTAINABILTY | $83.3M | 2.02M | 2.6% | ▲+3.6% Added · +71K sh | |
| 14 | Dimensional ETF Trust US CORE EQT MKT | $82.9M | 1.84M | 2.6% | ▲+27% Added · +395K sh | |
| 15 | Dimensional ETF Trust US CORE EQUITY 2 | $82.1M | 2.11M | 2.6% | ▲+23% Added · +398K sh | |
| 16 | Ishares TR 0-5 YR TIPS ETF | $80.1M | 774.9K | 2.5% | ▲+5.6% Added · +41K sh | |
| 17 | Dimensional ETF Trust EMERGING MKTS CO | $77.5M | 2.25M | 2.4% | ▲+7.6% Added · +158K sh | |
| 18 | Dimensional ETF Trust INTERNATNAL VAL | $53.7M | 1.02M | 1.7% | ▼−1.5% Reduced · −16K sh | |
| 19 | American Centy ETF TR AVANTIS RESPONSI | $51.7M | 701.8K | 1.6% | ▲New New position | |
| 20 | Dimensional ETF Trust EMGR CRE EQT MNG | $47.4M | 1.40M | 1.5% | ▲+8.4% Added · +108K sh | |
| 21 | Dimensional ETF Trust INTERNATIONAL | $41.8M | 987.5K | 1.3% | ▲+4.3% Added · +41K sh | |
| 22 | Dimensional ETF Trust GLOBAL REAL EST | $41.3M | 1.56M | 1.3% | ▲+5.8% Added · +85K sh | |
| 23 | Ishares TR TRUST ISHARE 0-1 | $36.7M | 332.9K | 1.2% | ▼−2.3% Reduced · −8K sh | |
| 24 | Dimensional ETF Trust SHORT DURATION F | $35.4M | 738.8K | 1.1% | ▲+14% Added · +90K sh | |
| 25 | American Centy ETF TR AVANTIS RESPONSI | $29.0M | 435.4K | 0.9% | ▲New New position | |
| 26 | Vanguard Scottsdale FDS SHORT TERM TREAS | $26.0M | 444.3K | 0.8% | ▼−8.8% Reduced · −43K sh | |
| 27 | Dimensional ETF Trust EMERGING MARKETS | $24.9M | 588.4K | 0.8% | ▲+2.6% Added · +15K sh | |
| 28 | Vanguard Index FDS S&P 500 ETF SHS | $21.3M | 35.7K | 0.7% | ▼−2.7% Reduced · −1K sh | |
| 29 | Dimensional ETF Trust US SMALL CAP ETF | $20.5M | 287.6K | 0.6% | ▼−3.6% Reduced · −11K sh | |
| 30 | Ishares TR CORE S&P500 ETF | $10.6M | 16.3K | 0.3% | ▲+14% Added · +2K sh | |
| 31 | Dimensional ETF Trust WORLD EQUITY ETF | $10.4M | 141.6K | 0.3% | ▲+3.9% Added · +5K sh | |
| 32 | State STR SPDR S&P 500 ETF T TR UNIT | $7.1M | 10.9K | 0.2% | ▲+2.0% Added · +212 sh | |
| 33 | Vanguard Index FDS TOTAL STK MKT | $5.5M | 17.2K | 0.2% | ▲+13% Added · +2K sh | |
| 34 | Manager Directed Portfolios VERT GLB SUST RE | $5.2M | 501.1K | 0.2% | ▲+31% Added · +119K sh | |
| 35 | Alphabet Inc CAP STK CL C | $4.5M | 15.7K | 0.1% | ▼−8.0% Reduced · −1K sh | |
| 36 | Vanguard Whitehall FDS HIGH DIV YLD | $4.2M | 28.6K | 0.1% | ▼−2.9% Reduced · −855 sh | |
| 37 | JPMorgan Chase & Co COM | $4.0M | 13.5K | 0.1% | ▼−7.6% Reduced · −1K sh | |
| 38 | Ishares Inc JP MORGAN EM ETF | $4.0M | 96.8K | 0.1% | ▼−23% Reduced · −28K sh | |
| 39 | Ishares TR 0-3 MNTH TREASRY | $3.9M | 38.6K | 0.1% | ▼−11% Reduced · −5K sh | |
| 40 | Ishares TR ISHS 1-5YR INVS | $3.0M | 56.7K | 0.1% | ▲+3.2% Added · +2K sh | |
| 41 | Ishares TR BROAD USD HIGH | $2.6M | 71.7K | 0.1% | ▼−19% Reduced · −16K sh | |
| 42 | Ishares TR CORE MSCI EAFE | $2.5M | 27.6K | 0.1% | ▼−11% Reduced · −3K sh | |
| 43 | Schwab Strategic TR FUNDAMENTAL US L | $2.2M | 80.4K | 0.1% | ▼−7.1% Reduced · −6K sh | |
| 44 | Vanguard Intl Equity Index F FTSE EMR MKT ETF | $2.2M | 41.1K | 0.1% | ▲+2.7% Added · +1K sh | |
| 45 | Vaneck ETF Trust GOLD MINERS ETF | $2.2M | 24.1K | 0.1% | ▲+2.4% Added · +558 sh | |
| 46 | Vanguard Whitehall FDS INTL HIGH ETF | $2.2M | 23.2K | 0.1% | ▼−6.1% Reduced · −1K sh | |
| 47 | Vanguard Tax-Managed FDS VAN FTSE DEV MKT | $2.1M | 32.9K | 0.1% | ▼−0.4% Reduced · −130 sh | |
| 48 | Apple Inc COM | $1.9M | 7.3K | 0.1% | ▲New New position | |
| 49 | SPDR Series Trust STATE STREET SPD | $1.8M | 34.1K | 0.1% | —Held | |
| 50 | Vanguard Index FDS LARGE CAP ETF | $1.8M | 5.9K | 0.1% | ▲+2.4% Added · +139 sh |
As-of date vs the date the SEC received each filing
Holdings from SEC EDGAR 13F-HR filings, updated quarterly ~45 days after quarter-end. Public domain. The book and weighting are long equity only; disclosed put/call options are listed separately and excluded from those totals. Price-derived performance is withheld until the price-source policy and freshness gate are green.