Rockbridge Asset Management LLC holds a focused book of 30 reported positions worth $152.5M as of Q2 2026 (disclosed Aug 10, 2026, a ~41-day 13F lag). This quarter they opened Kla Corp and trimmed O'reilly Automotive Inc. Their largest long position is Markel Group Inc at 12% of the reported non-option book. They also disclosed $2.6M in put options (a bearish bet), shown separately below and excluded from the non-option book. Cloning the disclosed picks since 2025 would be +2% (+2.2%/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 3.9 points over this window.
Growth of $10,000 cloning Rockbridge Asset Management LLC's disclosed long 13F book, rebalanced on each filing date (so it reflects each quarter's actual reporting lag, ~41 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.
100% mapped to company sectors
+4 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 Rockbridge Asset Management LLC
| Manager / fund | Shared names | Their $ in those |
|---|---|---|
| Uhlmann Price Securities, LLC | 16 / 30 | $2.4B |
| Hoffman, Alan N Investment Management | 4 / 30 | $144.7M |
| Oaktop Capital Management II, L.P. | 3 / 30 | $2.0B |
| Luma Capital S.A. - SPF | 7 / 30 | $87.9M |
| Avenir Corp | 16 / 30 | $626.8M |
| 9823 Capital, L.P. | 4 / 30 | $108.1M |
| Josh Arnold Investment Consultant, LLC | 3 / 30 | $111.0M |
| United American Securities Inc. (d/b/a UAS Asset Management) | 5 / 30 | $321.9M |
Ranked by the share of each fund's own book sitting in the names it shares with Rockbridge Asset Management 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 position's share of the portfolio. Click a row for its position history.
| # | Security | Value | Shares | % Port | Last move | History |
|---|---|---|---|---|---|---|
| 1 | Markel Group Inc COM | $18.7M | 9.6K | 12.3% | ▲+2.1% Added · +199 sh | |
| 2 | Amazon.Com Inc COM | $14.6M | 61.3K | 9.6% | ▲+0.1% Added · +70 sh | |
| 3 | O'Reilly Automotive Inc COM | $13.2M | 143.6K | 8.7% | ▼−1.6% Reduced · −2K sh | |
| 4 | Copart Inc COM | $13.0M | 462.7K | 8.6% | ▲+68% Added · +187K sh | |
| 5 | American Tower Corp COM | $12.9M | 78.9K | 8.5% | ▼−5.0% Reduced · −4K sh | |
| 6 | Microsoft Corp COM | $11.5M | 30.8K | 7.5% | ▼−0.1% Reduced · −44 sh | |
| 7 | Berkshire Hathaway Inc Cl B Ne COM | $11.4M | 22.7K | 7.5% | ▼−0.6% Reduced · −130 sh | |
| 8 | Apple Inc COM | $9.7M | 33.6K | 6.4% | ▼−0.6% Reduced · −210 sh | |
| 9 | Mastercard Incorporated Cl A COM | $8.2M | 16.0K | 5.4% | ▼−3.4% Reduced · −556 sh | |
| 10 | Lockheed Martin Corp COM | $8.0M | 15.7K | 5.3% | ▼−1.2% Reduced · −194 sh | |
| 11 | Visa Inc Cl A COM | $7.5M | 21.9K | 4.9% | ▼−11% Reduced · −3K sh | |
| 12 | Alphabet Inc Cap Stock Cl A COM | $7.3M | 20.5K | 4.8% | ▼−0.1% Reduced · −24 sh | |
| 13 | CCC Intelligent Solutions Hld COM | $3.5M | 677.5K | 2.3% | ▼−36% Reduced · −386K sh | |
| 14 | Builders Firstsource Inc COM | $3.2M | 36.2K | 2.1% | ▲+10.0% Added · +3K sh | |
| 15 | Kinsale Cap Group Inc COM | $3.0M | 8.9K | 1.9% | ▼−21% Reduced · −2K sh | |
| 16 | CBRE Group Inc Cl A COM | $1.5M | 11.3K | 1.0% | ▼−0.2% Reduced · −27 sh | |
| 17 | SBA Communications Corp Cl A COM | $840K | 4.8K | 0.6% | —Held | |
| 18 | JPMorgan Chase & Co COM | $793K | 2.4K | 0.5% | —Held | |
| 19 | Akre Focus ETF COM | $570K | 10.7K | 0.4% | ▲+60% Added · +4K sh | |
| 20 | Chevron Corp COM | $447K | 2.7K | 0.3% | —Held | |
| 21 | Kla Corp New COM | $341K | 1.1K | 0.2% | ▲New New position | |
| 22 | Ge Aerospace COM | $327K | 875 | 0.2% | —Held | |
| 23 | Lam Research Corp New COM | $316K | 730 | 0.2% | ▲New New position | |
| 24 | MPLX LP Unit Rep Ltd COM | $303K | 5.4K | 0.2% | —Held | |
| 25 | American Electric Power Co Inc COM | $289K | 2.1K | 0.2% | —Held | |
| 26 | Broadcom Inc COM | $264K | 700 | 0.2% | —Held | |
| 27 | Ge Vernova Inc COM | $256K | 218 | 0.2% | ▲New New position | |
| 28 | Procter And Gamble Co COM | $252K | 1.7K | 0.2% | —Held | |
| 29 | Isoenergy Ltd New COM | $100K | 10.0K | 0.1% | —Held | |
| 30 | N-Able Inc Common Stock COM | $54K | 14.7K | <0.1% | ▲New New position |
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.
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Use Arkolith to show Rockbridge Asset Management LLC's latest holdings, largest changes, and filing provenance.
Put / call positions from the 13F — totals include every disclosed option leg
| Type | Underlying | Notional value | Underlying shares |
|---|---|---|---|
| PUT · bearish | SS SPDR S&P 500 ETF TRUST-USSPY | $2.6M | 4K |
13F filers disclose option positions at the market value of the underlying the contracts reference, not the premium paid. A put is a bearish bet (it gains if the stock falls); a call is bullish. “Underlying shares” is the share count the contracts control, not a share holding. These legs are excluded from the non-option book, weighting, concentration and sector figures above.
As-of date vs the date the SEC received each filing
Reported 13F total per quarter. Raw filing totals can include option notional.
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.