Rockbridge Asset Management LLC — 13F Holdings & Portfolio
CIK 2056320 · latest 13F-HR filed 2026-05-15
Rockbridge Asset Management LLC manages $148.9M in 13F-reported U.S. long-equity assets across 27 reported positions as of its 2026-03-31 13F-HR filing. Its largest disclosed positions are MKL (12.07%), AMT (9.62%), ORLY (9.04%). Quarter over quarter (versus its 2025-12-31 filing) the fund opened 1 new position, exited 5, added to 8, and trimmed 16.
AUM is the long-equity portion reported on Form 13F-HR. Excludes short positions, cash, foreign holdings, and non-13F assets. For informational purposes only — not investment advice.
$148.9M
Long-equity book
27
Distinct positions
2026-03-31
Filed 2026-05-15
+1 / −5 / ↑8 / ↓16
vs 2025-12-31
| Name | Title / Status | Ownership | Type |
|---|
Top Adds (vs prior quarter)
- Kinsale Cap Group Inc$2.9M +299.5%
- Lockheed Martin Corp$1.3M +15.4%
- CCC Intelligent Solutions Hld$646.0K +11.3%
- Visa Inc Cl A$416.1K +5.9%
- Chevron Corp$146.8K +35.8%
Top Trims
- Microsoft Corp-$4.9M -29.9%
- Amazon.Com Inc-$4.2M -24.8%
- Mastercard Incorporated Cl A-$2.1M -20.3%
- Markel Group Inc-$1.4M -7.1%
- Berkshire Hathaway Inc Cl B Ne-$1.3M -10.6%
Exited Positions
- Universal Display Corp$1.4M
- Carmax Inc$726.7K
- Millrose Properties Inc Cl A$383.9K
- DigitalBridge Group Inc Cl A N$285.7K
- Aes Corp$143.4K
Rows tagged Call or Put are options positions, not stock. Per SEC Form 13F-HR, Value shows the notional value of the underlying (shares covered × underlying price), not the option premium. Shares is the number of underlying shares covered (divide by 100 for contract count).
| # | Issuer | Symbol | CUSIP | Value | Weight | Shares | Type |
|---|---|---|---|---|---|---|---|
| 1 | Markel Group Inc | MKL | 570535104 | $18.0M | 12.07% | 9,389 | SH |
| 2 | American Tower Corp | AMT | 03027X100 | $14.3M | 9.62% | 83,010 | SH |
| 3 | O'Reilly Automotive Inc | ORLY | 67103H107 | $13.5M | 9.04% | 145,884 | SH |
| 4 | Amazon.Com Inc | AMZN | 023135106 | $12.8M | 8.57% | 61,260 | SH |
| 5 | Microsoft Corp | MSFT | 594918104 | $11.4M | 7.67% | 30,849 | SH |
| 6 | Berkshire Hathaway Inc Cl B Ne | BRK.B | 084670702 | $11.0M | 7.36% | 22,860 | SH |
| 7 | Lockheed Martin Corp | LMT | 539830109 | $9.6M | 6.47% | 15,933 | SH |
| 8 | Copart Inc | CPRT | 217204106 | $9.2M | 6.15% | 275,992 | SH |
| 9 | Apple Inc | AAPL | 037833100 | $8.6M | 5.76% | 33,788 | SH |
| 10 | Mastercard Incorporated Cl A | MA | 57636Q104 | $8.3M | 5.55% | 16,548 | SH |
| 11 | Visa Inc Cl A | V | 92826C839 | $7.4M | 5.00% | 24,620 | SH |
| 12 | CCC Intelligent Solutions Hld | CCC | 12510Q100 | $6.4M | 4.29% | 1,063,655 | SH |
| 13 | Alphabet Inc Cap Stock Cl A | GOOGL | 02079K305 | $5.9M | 3.97% | 20,568 | SH |
| 14 | Kinsale Cap Group Inc | KNSL | 49714P108 | $3.9M | 2.61% | 11,387 | SH |
| 15 | Builders Firstsource Inc | BLDR | 12008R107 | $2.7M | 1.82% | 32,909 | SH |
| 16 | CBRE Group Inc Cl A | CBRE | 12504L109 | $1.5M | 1.03% | 11,322 | SH |
| 17 | SBA Communications Corp Cl A | SBAC | 78410G104 | $819.8K | 0.55% | 4,763 | SH |
| 18 | JPMorgan Chase & Co | JPM | 46625H100 | $713.0K | 0.48% | 2,424 | SH |
| 19 | State Street Spdr S&P 500 Etf Put | SPY | 78462F103 | $650.3K | 0.44% | 1,000 | SH |
| 20 | Chevron Corp | CVX | 166764100 | $557.6K | 0.37% | 2,695 | SH |
| 21 | Akre Focus ETF | AKRE | 74316P579 | $353.4K | 0.24% | 6,687 | SH |
| 22 | MPLX LP Unit Rep Ltd | MPLX | 55336V100 | $307.1K | 0.21% | 5,381 | SH |
| 23 | American Electric Power Co Inc | AEP | 025537101 | $277.4K | 0.19% | 2,116 | SH |
| 24 | Procter And Gamble Co | PG | 742718109 | $248.6K | 0.17% | 1,721 | SH |
| 25 | Ge Aerospace | GE | 369604301 | $248.3K | 0.17% | 875 | SH |
| 26 | Broadcom Inc | AVGO | 11135F101 | $216.7K | 0.15% | 700 | SH |
| 27 | Isoenergy Ltd New | ISOU | 46500E867 | $105.4K | 0.07% | 10,000 | SH |
| Period | Filed | AUM | Holdings | Accession |
|---|---|---|---|---|
| 2026-03-31 | 2026-05-15 | $148.9M | 27 | 0002056320-26-000006 |
| 2025-12-31 | 2026-02-12 | $165.6M | 31 | 0002056320-26-000003 |
| 2025-09-30 | 2025-11-12 | $169.4M | 29 | 0002056320-25-000009 |