Institutional Manager · CIK 0001846991
Round Rock Advisors, LLC
WILTON, CT · File #028-21052
Latest AUM
$665.1M
Positions
324
Top-10 Concentration
60.7%
Filings
9
Portfolio Value Over Time
2024-03
2024-06
2024-09
2024-12
2025-03
2025-06
2025-09
2025-12
Biggest QoQ Changes
Ranked by conviction flow (share change × current price) so mark-to-market moves don't dominate. Price effect column shows how much of the $ change was just the stock moving.
| Action | Issuer | Ticker / CUSIP | Δ Shares | Flow ($) | Price Effect |
|---|---|---|---|---|---|
| REDUCE | INVESCO EXCHANGE TRADED FD T | IVZ | -27,052 | -$5.2M | +$133,846 |
| ADD | SELECT SECTOR SPDR TR | 81369Y803 | +28,868 | +$4.2M | -$4.2M |
| EXITED | ITT INC | 45073V108 | -20,417 | -$3.6M | $0 |
| ADD | AMERICAN CENTY ETF TR | 025072257 | +70,614 | +$3.6M | -$20,910 |
| ADD | NEUBERGER BERMAN ETF TRUST | 64135A887 | +58,943 | +$3.0M | +$4,029 |
| ADD | SELECT SECTOR SPDR TR | 81369Y886 | +64,543 | +$2.8M | -$2.5M |
| EXITED | ISHARES TR | 46434VBD1 | -104,780 | -$2.6M | $0 |
| NEW | FRANKLIN TEMPLETON DIGITAL H | 354921108 | +41,264 | +$2.1M | $0 |
| REDUCE | TESLA INC | TSLA | -4,496 | -$2.0M | +$30,729 |
| ADD | FREQUENCY ELECTRS INC | FRQN | +29,347 | +$1.6M | +$271,012 |
Sector Allocation
Filing History
- 13F HOLDINGS REPORTQ/E Dec 2025324 pos · $665.1M
- 13F HOLDINGS REPORTQ/E Sep 2025327 pos · $631.2M
- 13F HOLDINGS REPORTQ/E Jun 2025215 pos · $579.7M
- 13F HOLDINGS REPORTQ/E Mar 2025216 pos · $539.2M
- 13F HOLDINGS REPORTQ/E Dec 2024217 pos · $487.5M
- 13F HOLDINGS REPORTQ/E Sep 2024183 pos · $427.8M
- 13F HOLDINGS REPORTQ/E Jun 2024180 pos · $410.7M
- 13F HOLDINGS REPORTQ/E Mar 2024190 pos · $417.4M
- 13F HOLDINGS REPORTQ/E Dec 2023141 pos · $263.6M
Top 20 Holdings — Dec 2025
| # | Issuer | Ticker | Shares | Value | % of Portfolio |
|---|---|---|---|---|---|
| 1 | INVESCO QQQ TR | IVZ | 81,102 | $49.8M | 10.26% |
| 2 | J P MORGAN EXCHANGE TRADED F | 46641Q837 | 900,926 | $45.6M | 9.39% |
| 3 | VANGUARD WHITEHALL FDS | 921946406 | 307,633 | $44.2M | 9.09% |
| 4 | VANECK ETF TRUST | 92189F676 | 88,265 | $31.8M | 6.55% |
| 5 | ISHARES TR | 464287804 | 241,647 | $29.0M | 5.98% |
| 6 | VANGUARD INDEX FDS | 922908629 | 94,747 | $27.5M | 5.66% |
| 7 | APPLE INC | AAPL | 66,993 | $18.2M | 3.75% |
| 8 | SELECT SECTOR SPDR TR | 81369Y704 | 111,086 | $17.2M | 3.55% |
| 9 | SELECT SECTOR SPDR TR | 81369Y209 | 103,227 | $16.0M | 3.29% |
| 10 | ISHARES TR | 464287168 | 110,913 | $15.7M | 3.22% |
| 11 | MICROSOFT CORP | MSFT | 31,900 | $15.4M | 3.18% |
| 12 | BERKSHIRE HATHAWAY INC DEL | BRK-A | 19 | $14.3M | 2.95% |
| 13 | AMERICAN CENTY ETF TR | 025072257 | 237,893 | $12.3M | 2.53% |
| 14 | ALPHABET INC | GOOG | 37,261 | $11.7M | 2.41% |
| 15 | NEUBERGER BERMAN ETF TRUST | 64135A887 | 226,835 | $11.6M | 2.39% |
| 16 | AMAZON COM INC | AMZN | 38,518 | $8.9M | 1.83% |
| 17 | INVESCO EXCHANGE TRADED FD T | IVZ | 44,909 | $8.6M | 1.77% |
| 18 | SELECT SECTOR SPDR TR | 81369Y803 | 59,415 | $8.6M | 1.76% |
| 19 | SPDR S&P 500 ETF TR | SPY | 12,069 | $8.2M | 1.70% |
| 20 | SELECT SECTOR SPDR TR | 81369Y886 | 121,346 | $5.2M | 1.07% |