RA
Rockbridge Asset Management LLC SEC 13F Filing (Q2 2026) — Holdings & Portfolio
Rockbridge Asset Management LLCCIK: 0002056320
Momentum followerQuality / disciplined sizingDiversified strategy
Total reported value
$155.1M
Reporting period: 2026-06-30 · Number of holdings: 31
Rockbridge Asset Management LLC disclosed 31 holdings in its latest 13F filing for the period ending 2026-06-30, with total reported value of $155.1M and a quarterly turnover rate of 13.7%.
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Personality snowflake
- Concentration
- 28.53
- Portfolio Stability
- 13.7
- Momentum
- 100
- Sector conviction
- 57.76
- Diversification
- 62
- Sizing Uniformity
- 88.81
Rockbridge Asset Management LLC's disclosed holdings carry a Herfindahl concentration index of 0.071 — mathematically equivalent to about 14 equally-sized positions, well below its 31 actual disclosed holdings. That gap points to a strategy built around a small core of high-conviction bets rather than broad diversification.
Position sizes are fairly uniform across the portfolio (a coefficient of variation of 1.12), suggesting a disciplined, rules-based approach to how much capital goes into each idea.
Recent activity leans toward adding more aggressively to already-large existing positions than to newly initiated ones (a 4.7 percentage-point tilt) — a pattern consistent with a momentum-following approach.
Source and citation information
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Recent moves
View source Form 13F filing on SEC.govAdd CPRT
+67.7% $3.9M
Trim CCC
-36.3% -$2.9M
Trim AMT
-5.0% -$1.4M
Trim LMT
-1.2% -$1.6M
Add SPY
+250.0% $2.0M
Add AMZN
+0.1% $1.9M
Holdings Map
New buyAddUnchangedTrim
Top 10 holdings by weight
Full holdings list this quarter
| # | Ticker | Issuer | Asset Subclass | Weight | Weight Change | Shares Change | 4Q Trend |
|---|---|---|---|---|---|---|---|
| 1 | MKL | Markel Group Inc | Stock-Financials | 12.07% | — | +2.12% | |
| 2 | AMZN | Amazon.com Inc | Stock-Consumer Disc | 9.42% | +0.85% | +0.11% | |
| 3 | ORLY | O'reilly Automotive Inc | Stock-Consumer Disc | 8.52% | -0.52% | -1.57% | |
| 4 | CPRT | Copart Inc | Stock-Industrials | 8.41% | +2.26% | +67.65% | |
| 5 | AMT | American Tower CORP | Stock-Real Estate | 8.31% | -1.31% | -5.00% | |
| 6 | MSFT | Microsoft CORP | Stock-Tech | 7.41% | -0.26% | -0.14% | |
| 7 | BRK-B | Berkshire Hathaway Inc-cl B | Stock-Other | 7.33% | -0.03% | -0.57% | |
| 8 | AAPL | Apple Inc | Stock-Tech | 6.26% | +0.50% | -0.62% | |
| 9 | MA | Mastercard Inc - A | Stock-Financials | 5.29% | -0.26% | -3.36% | |
| 10 | LMT | Lockheed Martin CORP | Stock-Industrials | 5.17% | -1.30% | -1.22% | |
| 11 | V | Visa Inc-class A Shares | Stock-Financials | 4.84% | -0.16% | -11.15% | |
| 12 | GOOGL | Alphabet Inc-cl A | Stock-Comm Services | 4.73% | +0.76% | -0.12% | |
| 13 | CCC | Ccc Intelligent Solutions Ho | Stock-Tech | 2.25% | -2.04% | -36.30% | |
| 14 | BLDR | Builders Firstsource Inc | Stock-Industrials | 2.09% | +0.27% | +9.98% | |
| 15 | KNSL | Kinsale Capital Group Inc | Stock-Financials | 1.90% | -0.71% | -21.41% | |
| 16 | SPY | Ss Spdr S&p 500 ETF Trust-us | ETF-Large Cap & Growth | 1.68% | +1.24% | +250.00% | |
| 17 | CBRE | Cbre Group Inc - A | Stock-Real Estate | 0.98% | -0.05% | -0.24% | |
| 18 | SBAC | Sba Communications CORP | Stock-Real Estate | 0.54% | -0.01% | — | |
| 19 | JPM | Jpmorgan Chase & Co | Stock-Financials | 0.51% | +0.03% | — | |
| 20 | AKRE | Akre Focus ETF | ETF-Other | 0.37% | +0.13% | +60.15% | |
| 21 | CVX | Chevron CORP | Stock-Energy | 0.29% | -0.08% | — | |
| 22 | KLAC | Kla CORP | Stock-Tech | 0.22% | +0.22% | NEW | |
| 23 | GE | General Electric | Stock-Industrials | 0.21% | +0.04% | — | |
| 24 | LRCX | Lam Research CORP | Stock-Tech | 0.20% | +0.20% | NEW | |
| 25 | MPLX | Mplx LP | Stock-Energy | 0.20% | -0.01% | — | |
| 26 | AEP | American Electric Power | Stock-Utilities | 0.19% | — | — | |
| 27 | AVGO | Broadcom Inc | Stock-Tech | 0.17% | +0.02% | — | |
| 28 | GEV | GE Vernova Inc | Stock-Industrials | 0.17% | +0.17% | NEW | |
| 29 | PG | Procter & Gamble Co/the | Stock-Consumer Staples | 0.16% | -0.01% | — | |
| 30 | ISOU | Isoenergy LTD | Stock-Other | 0.06% | -0.01% | — | |
| 31 | NABL | N-able Inc | Stock-Other | 0.03% | +0.03% | NEW |
Portfolio Performance
Performance for Q3 2026
+6%
Performance Last 4 Quarters
+2.4%
- Stdev
- +11.3%
- Beta
- +0.61
- Alpha
- -6.7%
- Max Drawdown
- -9.4%
- Annualized Perf
- +4.4%
- Batting Avg vs S&P
- +27.8%
- Sortino
- +0.69
- Stutzer
- +0.13
- Treynor
- +0.08
- Sterling
- +0.24
- Calmar
- +0.47
- Information Ratio
- -1.5
- Tracking Error
- +9.4%
- Stdev Down
- +7.2%
- Winning Months %
- +61.1%
- Losing Months %
- +38.9%
- Best 12 Months
- +3%
- Worst 12 Months
- -5%
- Efficiency Ratio
- +0.15
- Sharpe
- +0.44
- Stdev Sectors
- +9.5%
- Skewness
- -0.09
- Kurtosis
- -0.24
- Upside Potential
- +2.44
Reported value over time
Sector allocation
Sector allocation over time
Quarterly history
Holding changes this quarter
Rockbridge Asset Management LLC's most significant position changes for 2026-06-30: New buy: Kla CORP (KLAC); New buy: Lam Research CORP (LRCX); New buy: GE Vernova Inc (GEV); New buy: N-able Inc (NABL); Add: Copart Inc (CPRT) — shares +67.65%.
| # | Ticker | Issuer | Weight Change | Shares Change | Action |
|---|---|---|---|---|---|
| 1 | CPRT | Copart Inc | +2.3% | +67.65% | Add |
| 2 | SPY | Ss Spdr S&p 500 ETF Trust-us | +1.2% | +250.00% | Add |
| 3 | AMZN | Amazon.com Inc | +0.9% | +0.11% | Add |
| 4 | GOOGL | Alphabet Inc-cl A | +0.8% | -0.12% | Trim |
| 5 | AAPL | Apple Inc | +0.5% | -0.62% | Trim |
| 6 | BLDR | Builders Firstsource Inc | +0.3% | +9.98% | Add |
| 7 | KLAC | Kla CORP | +0.2% | NEW | New buy |
| 8 | LRCX | Lam Research CORP | +0.2% | NEW | New buy |
| 9 | GEV | GE Vernova Inc | +0.2% | NEW | New buy |
| 10 | AKRE | Akre Focus ETF | +0.1% | +60.15% | Add |
| 11 | GE | General Electric | 0% | — | Unchanged |
| 12 | JPM | Jpmorgan Chase & Co | 0% | — | Unchanged |
| 13 | NABL | N-able Inc | 0% | NEW | New buy |
| 14 | AVGO | Broadcom Inc | 0% | — | Unchanged |
| 15 | MKL | Markel Group Inc | — | +2.12% | Add |
| 16 | AEP | American Electric Power | — | — | Unchanged |
| 17 | SBAC | Sba Communications CORP | 0% | — | Unchanged |
| 18 | ISOU | Isoenergy LTD | 0% | — | Unchanged |
| 19 | MPLX | Mplx LP | 0% | — | Unchanged |
| 20 | PG | Procter & Gamble Co/the | 0% | — | Unchanged |
| 21 | BRK-B | Berkshire Hathaway Inc-cl B | 0% | -0.57% | Trim |
| 22 | CBRE | Cbre Group Inc - A | -0.1% | -0.24% | Trim |
| 23 | CVX | Chevron CORP | -0.1% | — | Unchanged |
| 24 | V | Visa Inc-class A Shares | -0.2% | -11.15% | Trim |
| 25 | MSFT | Microsoft CORP | -0.3% | -0.14% | Trim |
| 26 | MA | Mastercard Inc - A | -0.3% | -3.36% | Trim |
| 27 | ORLY | O'reilly Automotive Inc | -0.5% | -1.57% | Trim |
| 28 | KNSL | Kinsale Capital Group Inc | -0.7% | -21.41% | Trim |
| 29 | LMT | Lockheed Martin CORP | -1.3% | -1.22% | Trim |
| 30 | AMT | American Tower CORP | -1.3% | -5.00% | Trim |
| 31 | CCC | Ccc Intelligent Solutions Ho | -2% | -36.30% | Trim |
💡
Data Source Notice: AlphaSMO is the web's most authoritative 13F / Inside Trader database. Institutional holdings and insider trades presented here are precisely computed to deliver accurate portfolio reporting.
Filing History
FAQ
What is Rockbridge Asset Management LLC and what type of investor is it?
Rockbridge Asset Management LLC is an investment manager that files SEC Form 13F quarterly, disclosing its U.S. public equity holdings to regulators. As of the most recent reporting period (2026-06-30), the firm manages a tracked equity portfolio valued at approximately $155.1M, spread across 31 disclosed positions.
What are Rockbridge Asset Management LLC's largest equity positions?
Based on the latest 13F filing, Rockbridge Asset Management LLC's top holdings by market value are:
1. Markel Group Inc (MKL) — $18.7M (12.1%)
2. Amazon.com Inc (AMZN) — $14.6M (9.4%)
3. O'reilly Automotive Inc (ORLY) — $13.2M (8.5%)
4. Copart Inc (CPRT) — $13.0M (8.4%)
5. American Tower CORP (AMT) — $12.9M (8.3%)
What changes did Rockbridge Asset Management LLC make in its most recent portfolio filing?
In the latest reported quarter, Rockbridge Asset Management LLC made 22 notable position adjustments: 4 new positions were initiated, 6 existing holdings were added to, 12 positions were partially reduced, and 0 were completely exited. The largest of these moves: New buy: Kla CORP (KLAC); New buy: Lam Research CORP (LRCX); New buy: GE Vernova Inc (GEV); New buy: N-able Inc (NABL); Add: Copart Inc (CPRT) — shares +67.65%
What sectors does Rockbridge Asset Management LLC focus on?
Rockbridge Asset Management LLC is concentrated in the following sectors based on its current disclosed equity portfolio:
• Financials: 27.2%
• Consumer Discretionary: 19.8%
• Information Technology: 18.3%
• Industrials: 17.7%
• Real Estate: 10.9%
• Communication Services: 5.2%
Investment Profile
Rockbridge Asset Management LLC returned an annualized 4.4% over the trailing 18 months — underperforming the S&P 500 by 6.7 points — based on a reconstructed track record of its disclosed 13F positions, with a beta of 0.61 (less volatile than the market) and a 28% quarterly batting average against the index.
Its portfolio is broadly diversified and long-term-holding.
It has added to its V position over the past two quarters (+$480.4K, now $7.5M), while trimming AMT over the same stretch (-$2.6M, still holding $12.9M).
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