Round Rock Advisors LLC holds a focused book of 318 stocks worth $776.4M as of Q2 2026 (disclosed Aug 12, 2026, a ~43-day 13F lag). This quarter they opened Ishares Bitcoin Trust ETF and trimmed Vaneck Semiconductor ETF. Their largest long position is Invesco QQQ Trust Series 1 at 8% of the equity book.
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.
37% 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
Other tracked managers holding the same core names as Round Rock Advisors LLC
| Manager / fund | Shared names | Their $ in those |
|---|---|---|
| MORGAN STANLEY | 79 / 80 | $477.4B |
| JPMORGAN CHASE & CO | 78 / 80 | $444.0B |
| UBS Group AG | 77 / 80 | $124.5B |
| Integrated Wealth Concepts LLC | 77 / 80 | $3.8B |
| Farther Finance Advisors, LLC | 77 / 80 | $2.6B |
| BlackRock, Inc. | 76 / 80 | $1.8T |
| FMR LLC | 76 / 80 | $626.5B |
| BANK OF AMERICA CORP /DE/ | 76 / 80 | $334.7B |
Ranked by the share of each fund's own book sitting in the names it shares with Round Rock Advisors LLC: 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 stock's share of the portfolio. Click a row for its position history.
| # | Security | Value | Shares | % Port | Last move | History |
|---|---|---|---|---|---|---|
| 1 | Invesco QQQ TR UNIT SER 1 | $61.0M | 82.9K | 7.9% | ▲+3.5% Added · +3K sh | |
| 2 | Vaneck ETF Trust SEMICONDUCTR ETF | $55.2M | 84.2K | 7.1% | ▼−3.0% Reduced · −3K sh | |
| 3 | Vanguard Whitehall FDS HIGH DIV YLD | $51.3M | 324.9K | 6.6% | ▲+3.8% Added · +12K sh | |
| 4 | J P Morgan Exchange Traded F ULTRA SHRT ETF | $48.2M | 953.7K | 6.2% | ▲+5.3% Added · +48K sh | |
| 5 | Ishares TR CORE S&P SCP ETF | $36.3M | 244.8K | 4.7% | ▲+2.4% Added · +6K sh | |
| 6 | Vanguard Index FDS MID CAP ETF | $31.9M | 396.5K | 4.1% | ▲+313% Added · +301K sh | |
| 7 | Select Sector SPDR TR ST STR INDL ETF | $21.6M | 116.4K | 2.8% | ▲+3.2% Added · +4K sh | |
| 8 | Apple Inc COM | $19.2M | 66.4K | 2.5% | ▼−0.6% Reduced · −409 sh | |
| 9 | Ishares TR SELECT DIVID ETF | $18.8M | 120.1K | 2.4% | ▲+4.8% Added · +5K sh | |
| 10 | Select Sector SPDR TR ST STR CARE ETF | $18.2M | 115.0K | 2.4% | ▲+6.6% Added · +7K sh | |
| 11 | American Centy ETF TR SHORT DURTN STRG | $16.6M | 324.0K | 2.1% | ▲+13% Added · +37K sh | |
| 12 | Berkshire Hathaway Inc Del CL A | $13.5M | 18 | 1.7% | ▼−5.3% Reduced · −1 sh | |
| 13 | Alphabet Inc CAP STK CL C | $13.1M | 37.1K | 1.7% | ▼−0.3% Reduced · −124 sh | |
| 14 | Neuberger Berman ETF Trust SHORT DURATION I | $13.0M | 257.5K | 1.7% | ▲+3.8% Added · +9K sh | |
| 15 | Microsoft Corp COM | $11.9M | 31.9K | 1.5% | ▲+0.2% Added · +55 sh | |
| 16 | Invesco Exchange Traded FD T S&P500 EQL WGT | $11.3M | 53.1K | 1.5% | ▲+18% Added · +8K sh | |
| 17 | Select Sector SPDR TR ST STR TECHN ETF | $10.8M | 56.7K | 1.4% | ▼−1.8% Reduced · −1K sh | |
| 18 | Amazon Com Inc COM | $8.1M | 34.0K | 1.0% | ▼−0.3% Reduced · −114 sh | |
| 19 | State STR SPDR S&P 500 ETF T TR UNIT | $7.6M | 10.1K | 1.0% | ▲+16% Added · +1K sh | |
| 20 | Select Sector SPDR TR ST STR UTIL ETF | $6.0M | 131.8K | 0.8% | ▲+4.3% Added · +5K sh | |
| 21 | Nvidia Corporation COM | $4.7M | 23.5K | 0.6% | ▼−1.1% Reduced · −254 sh | |
| 22 | Abbvie Inc COM | $4.5M | 18.0K | 0.6% | ▼−0.3% Reduced · −48 sh | |
| 23 | Marinemax Inc COM | $4.4M | 120.0K | 0.6% | ▲+92% Added · +58K sh | |
| 24 | Exxon Mobil Corp COM | $4.3M | 31.8K | 0.6% | ▲+0.3% Added · +111 sh | |
| 25 | Invesco Exch Traded FD TR II NASDAQ 100 ETF | $4.3M | 14.2K | 0.6% | ▲+0.5% Added · +74 sh | |
| 26 | Ishares TR MSCI USA MIN ETF | $4.3M | 44.3K | 0.6% | ▼−2.7% Reduced · −1K sh | |
| 27 | Ishares TR S&P 500 GRWT ETF | $4.2M | 30.8K | 0.5% | ▼−1.5% Reduced · −479 sh | |
| 28 | Unitedhealth Group Inc COM | $3.8M | 9.1K | 0.5% | ▼−3.1% Reduced · −295 sh | |
| 29 | Alphabet Inc CAP STK CL A | $3.4M | 9.5K | 0.4% | ▼−0.5% Reduced · −48 sh | |
| 30 | Micron Technology Inc COM | $3.4M | 2.9K | 0.4% | ▼−16% Reduced · −548 sh | |
| 31 | International Business Machs COM | $3.3M | 11.6K | 0.4% | ▲+3.3% Added · +370 sh | |
| 32 | Ishares TR CORE S&P500 ETF | $3.3M | 4.3K | 0.4% | ▲+4.1% Added · +171 sh | |
| 33 | Williams Cos Inc COM | $3.2M | 42.8K | 0.4% | —Held | |
| 34 | Ishares Bitcoin Trust ETF SHS BEN INT | $3.1M | 93.8K | 0.4% | ▲New New position | |
| 35 | Frequency Electrs Inc COM | $3.1M | 46.1K | 0.4% | —Held | |
| 36 | Dell Technologies Inc CL C | $3.0M | 7.1K | 0.4% | —Held | |
| 37 | Air Products And Chemicals I COM | $3.0M | 10.1K | 0.4% | —Held | |
| 38 | Amphenol Corp CL A | $3.0M | 16.8K | 0.4% | —Held | |
| 39 | Intercontinental Exchange In COM | $2.9M | 23.9K | 0.4% | —Held | |
| 40 | Chubb Limited COM | $2.7M | 7.9K | 0.3% | —Held | |
| 41 | Johnson & Johnson COM | $2.7M | 10.5K | 0.3% | ▲+0.4% Added · +42 sh | |
| 42 | Ishares TR IBONDS DEC2026 | $2.6M | 109.2K | 0.3% | ▼−0.7% Reduced · −783 sh | |
| 43 | Capital One Finl Corp COM | $2.6M | 13.1K | 0.3% | ▲+0.1% Added · +11 sh | |
| 44 | Park Aerospace Corp COM | $2.6M | 67.8K | 0.3% | —Held | |
| 45 | Citigroup Inc COM NEW | $2.5M | 18.0K | 0.3% | —Held | |
| 46 | Allient Inc COM | $2.5M | 24.1K | 0.3% | ▲+8.2% Added · +2K sh | |
| 47 | Berkshire Hathaway Inc Del CL B NEW | $2.4M | 4.9K | 0.3% | ▲+24% Added · +930 sh | |
| 48 | Vanguard World FD INF TECH ETF | $2.3M | 19.5K | 0.3% | ▲+698% Added · +17K sh | |
| 49 | Teamshares Inc COM | $2.3M | 277.2K | 0.3% | ▲New New position | |
| 50 | Chevron Corporation COM | $2.2M | 13.4K | 0.3% | —Held |
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.
As-of date vs the date the SEC received each filing
| Quarter | As of | Filed | Positions | Value | Form |
|---|---|---|---|---|---|
| Q2 2026 | Jun 30, 2026 | Aug 12, 2026 | 318 | $776.4M | 13F-HR |
| 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, filed up to 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.