Round Rock Advisors LLC holds a focused book of 318 stocks worth $653.5M as of Q1 2026 (disclosed May 15, 2026, a ~45-day 13F lag). This quarter they opened Stratasys Ltd and trimmed Invesco QQQ Trust Series 1. Their largest long position is Vanguard High DVD Yield ETF at 7% 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/1846991/holdings"
Use Arkolith to show Round Rock Advisors LLC'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.
38% 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 | Vanguard Whitehall FDS HIGH DIV YLD | $46.3M | 312.9K | 7.1% | ▲+1.7% Added · +5K sh | |
| 2 | Invesco QQQ TR UNIT SER 1 | $46.2M | 80.1K | 7.1% | ▼−1.3% Reduced · −1K sh | |
| 3 | J P Morgan Exchange Traded F ULTRA SHRT ETF | $45.9M | 906.1K | 7.0% | ▲+0.6% Added · +5K sh | |
| 4 | Vaneck ETF Trust SEMICONDUCTR ETF | $33.3M | 86.8K | 5.1% | ▼−1.7% Reduced · −1K sh | |
| 5 | Ishares TR CORE S&P SCP ETF | $29.7M | 239.0K | 4.5% | ▼−1.1% Reduced · −3K sh | |
| 6 | Vanguard Index FDS MID CAP ETF | $27.6M | 96.0K | 4.2% | ▲+1.3% Added · +1K sh | |
| 7 | Select Sector SPDR TR STATE STREET IND | $18.2M | 112.7K | 2.8% | ▲+1.5% Added · +2K sh | |
| 8 | Ishares TR SELECT DIVID ETF | $17.4M | 114.6K | 2.7% | ▲+3.4% Added · +4K sh | |
| 9 | Apple Inc COM | $17.0M | 66.8K | 2.6% | ▼−0.3% Reduced · −172 sh | |
| 10 | Select Sector SPDR TR STATE STREET HEA | $15.8M | 107.9K | 2.4% | ▲+4.5% Added · +5K sh | |
| 11 | American Centy ETF TR SHORT DURTN STRG | $14.7M | 287.5K | 2.3% | ▲+21% Added · +50K sh | |
| 12 | Berkshire Hathaway Inc Del CL A | $13.6M | 19 | 2.1% | —Held | |
| 13 | Neuberger Berman ETF Trust SHORT DURATION I | $12.6M | 248.2K | 1.9% | ▲+9.4% Added · +21K sh | |
| 14 | Microsoft Corp COM | $11.8M | 31.8K | 1.8% | ▼−0.2% Reduced · −61 sh | |
| 15 | Alphabet Inc CAP STK CL C | $10.7M | 37.2K | 1.6% | ▼−0.1% Reduced · −31 sh | |
| 16 | Invesco Exchange Traded FD T S&P500 EQL WGT | $8.6M | 45.0K | 1.3% | ▲+0.3% Added · +117 sh | |
| 17 | Select Sector SPDR TR STATE STREET TEC | $7.7M | 57.7K | 1.2% | ▼−2.9% Reduced · −2K sh | |
| 18 | Amazon Com Inc COM | $7.1M | 34.1K | 1.1% | ▼−12% Reduced · −4K sh | |
| 19 | Select Sector SPDR TR STATE STREET UTI | $5.8M | 126.3K | 0.9% | ▲+4.1% Added · +5K sh | |
| 20 | State STR SPDR S&P 500 ETF T TR UNIT | $5.7M | 8.7K | 0.9% | ▼−28% Reduced · −3K sh | |
| 21 | Exxon Mobil Corp COM | $5.4M | 31.7K | 0.8% | ▼−1.1% Reduced · −367 sh | |
| 22 | Ishares TR MSCI USA MIN VOL | $4.2M | 45.5K | 0.6% | ▼−0.9% Reduced · −399 sh | |
| 23 | Nvidia Corporation COM | $4.1M | 23.8K | 0.6% | ▼~0% Reduced · −3 sh | |
| 24 | Abbvie Inc COM | $3.9M | 18.1K | 0.6% | ▼−7.8% Reduced · −2K sh | |
| 25 | Intercontinental Exchange In COM | $3.8M | 23.9K | 0.6% | ▼−8.4% Reduced · −2K sh | |
| 26 | Ishares TR S&P 500 GRWT ETF | $3.5M | 31.3K | 0.5% | ▲~0% Added · +9 sh | |
| 27 | Invesco Exch Traded FD TR II NASDAQ 100 ETF | $3.4M | 14.1K | 0.5% | ▲+1.8% Added · +246 sh | |
| 28 | Williams Cos Inc COM | $3.1M | 42.8K | 0.5% | —Held | |
| 29 | Air Products And Chemicals I COM | $2.9M | 10.1K | 0.5% | ▼−7.7% Reduced · −849 sh | |
| 30 | Chevron Corporation COM | $2.8M | 13.4K | 0.4% | ▼−7.2% Reduced · −1K sh | |
| 31 | Alphabet Inc CAP STK CL A | $2.7M | 9.6K | 0.4% | ▼−5.7% Reduced · −581 sh | |
| 32 | Ishares TR CORE S&P500 ETF | $2.7M | 4.2K | 0.4% | ▲+48% Added · +1K sh | |
| 33 | International Business Machs COM | $2.7M | 11.2K | 0.4% | ▼−17% Reduced · −2K sh | |
| 34 | Ishares TR IBONDS DEC2026 | $2.7M | 110.0K | 0.4% | ▲+0.1% Added · +86 sh | |
| 35 | Chubb Ltd Switz COM | $2.6M | 7.9K | 0.4% | ▼−9.4% Reduced · −820 sh | |
| 36 | Johnson & Johnson COM | $2.6M | 10.5K | 0.4% | ▲+8.6% Added · +832 sh | |
| 37 | Unitedhealth Group Inc COM | $2.5M | 9.4K | 0.4% | ▼−7.3% Reduced · −734 sh | |
| 38 | Capital One Finl Corp COM | $2.4M | 13.1K | 0.4% | ▼−9.7% Reduced · −1K sh | |
| 39 | Neogen Corp COM | $2.2M | 242.1K | 0.3% | ▲+54% Added · +85K sh | |
| 40 | Liberty Energy Inc COM CL A | $2.2M | 74.8K | 0.3% | ▼−28% Reduced · −29K sh | |
| 41 | Franklin Templeton Digital H BITCOIN ETF SHS | $2.1M | 54.7K | 0.3% | ▲+33% Added · +13K sh | |
| 42 | Amphenol Corp CL A | $2.1M | 16.8K | 0.3% | ▲+0.6% Added · +102 sh | |
| 43 | Ishares TR IBONDS 27 ETF | $2.1M | 86.8K | 0.3% | ▲+0.1% Added · +89 sh | |
| 44 | Frequency Electrs Inc COM | $2.0M | 46.1K | 0.3% | ▼−5.2% Reduced · −3K sh | |
| 45 | Citigroup Inc COM NEW | $2.0M | 18.0K | 0.3% | ▲+5.1% Added · +878 sh | |
| 46 | Honeywell Intl Inc COM | $2.0M | 9.0K | 0.3% | ▼−9.2% Reduced · −910 sh | |
| 47 | Vanguard Specialized Funds DIV APP ETF | $2.0M | 9.2K | 0.3% | ▼−1.8% Reduced · −168 sh | |
| 48 | J P Morgan Exchange Traded F EQUITY PREMIUM | $1.9M | 33.9K | 0.3% | ▼−4.4% Reduced · −2K sh | |
| 49 | Berkshire Hathaway Inc Del CL B NEW | $1.9M | 3.9K | 0.3% | ▼−20% Reduced · −1K sh | |
| 50 | Bristow Group Inc COM | $1.9M | 40.0K | 0.3% | ▲+26% Added · +8K sh |
As-of date vs the date the SEC received each filing
| Quarter | As of | Filed | Positions | Value | Form |
|---|---|---|---|---|---|
| Q1 2026 | Mar 31, 2026 | May 15, 2026 | 318 | $653.5M | 13F-HR |
| Q4 2025 | Dec 31, 2025 | Apr 7, 2026 | 326 | $664.8M | 13F-HR/A |
| Q3 2025 | Sep 30, 2025 | Nov 14, 2025 | 327 | $631.2M | 13F-HR |
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.