Rockbridge Asset Management LLC In its 13F for Q1 2026 (holdings as of March 31, 2026, filed May 15, 2026), Rockbridge Asset Management LLC reported 26 stock positions worth $148.3 million . Its top holding was Markel (MKL) at 12.1% of the portfolio, followed by American Tower (AMT, 9.7% ) and O'reilly Automotive (ORLY, 9.1% ). Compared with Q4 2025, it opened 1 new position, sold out of 5, added to 6 and reduced 11. The biggest buy was Kinsale Capital (KNSL, shares +357% ) and the biggest sale Microsoft (MSFT, shares −8% ).
Location ALEXANDRIA, VA
CIK 0002056320
Portfolio Value $148.3M (Q1 2026) Holdings 26 stocks · $148.3M Holdings quarter Q2 2026 Q1 2026 Q4 2025 Q3 2025 Q2 2025 Q1 2025 Q4 2024
Stock % Of Portfolio ▼ Shares Held Total Value Change vs Q4 2025 MKL Markel Group Inc. 9,389 $18.0M Add +4.4% AMT American Tower Corp. 83,010 $14.3M Reduce -6.1% ORLY O'reilly Automotive Inc. 145,884 $13.5M Reduce -9.9% AMZN Amazon.com Inc. 61,260 $12.8M Reduce -16.7% MSFT Microsoft Corp. 30,849 $11.4M Reduce -8.5% BRK.B Berkshire Hathaway Inc. Class B 22,860 $11.0M Reduce -6.2% LMT Lockheed Martin Corp. 15,933 $9.6M Reduce -7.7% CPRT Copart Inc. 275,992 $9.2M Add +5.7% AAPL Apple Inc. 33,788 $8.6M Reduce -6.6% MA Mastercard Inc. Class A 16,548 $8.3M Reduce -9.0% V Visa Inc. Class A 24,620 $7.4M Add +22.9% CCC CCC Intelligent Solutions Ho 1,063,655 $6.4M Add +47.4% GOOGL Alphabet Inc. Class A 20,568 $5.9M Reduce -5.1% KNSL Kinsale Capital Group Inc. 11,387 $3.9M Add +357.3% BLDR Builders Firstsource Inc. 32,909 $2.7M Reduce -7.9% CBRE CBRE Group Inc. Class A 11,322 $1.5M New SBAC SBA Communications Corp. 4,763 $820K Reduce -5.6% JPM JPMorgan Chase & Co. 2,424 $713K No change CVX Chevron Corp. 2,695 $558K No change AKRE Akre Focus ETF filed as PROFESIONALLY MANAGED PORTFO 6,687 $353K Add +13.6% MPLX MPLX LP 5,381 $307K No change AEP American Electric Power 2,116 $277K No change PG The Procter & Gamble Co. 1,721 $249K No change GE General Electric filed as GE AEROSPACE 875 $248K No change AVGO Broadcom Inc. 700 $217K No change ISOU Isoenergy Ltd. 10,000 $105K No change
Options reported separately and not counted above: SPY puts ($650K).
Portfolio Sells Q4 2025 → Q1 2026 Portfolio Sells quarter Q2 2026 Q1 2026 Q4 2025 Q3 2025 Q2 2025 Q1 2025 Q4 2024
Stock Change vs Q4 2025 % Of Portfolio Change To Portfolio ▲ MSFT Microsoft Corp. Reduce -8.5% 7.70% −2.18 AMZN Amazon.com Inc. Reduce -16.7% 8.61% −1.68 OLED Universal Display Corp. Sold out 0.00% −0.83 MA Mastercard Inc. Class A Reduce -9.0% 5.58% −0.72 KMX Carmax Inc. Sold out 0.00% −0.44 BLDR Builders Firstsource Inc. Reduce -7.9% 1.83% −0.40 MRP Millrose Properties Sold out 0.00% −0.23 AAPL Apple Inc. Reduce -6.6% 5.78% −0.18 DBRG Digitalbridge Group Inc. Sold out 0.00% −0.17 GOOGL Alphabet Inc. Class A Reduce -5.1% 3.99% −0.12 AES AES Corp. Sold out 0.00% −0.09 BRK.B Berkshire Hathaway Inc. Class B Reduce -6.2% 7.39% −0.04 SBAC SBA Communications Corp. Reduce -5.6% 0.55% −0.04 ORLY O'reilly Automotive Inc. Reduce -9.9% 9.08% +0.13 AMT American Tower Corp. Reduce -6.1% 9.66% +0.26 LMT Lockheed Martin Corp. Reduce -7.7% 6.50% +1.44
Portfolio Buys Q4 2025 → Q1 2026 Portfolio Buys quarter Q2 2026 Q1 2026 Q4 2025 Q3 2025 Q2 2025 Q1 2025 Q4 2024
Stock Change vs Q4 2025 % Of Portfolio Change To Portfolio ▼ KNSL Kinsale Capital Group Inc. Add +357.3% 2.62% +2.03 CBRE CBRE Group Inc. Class A New 1.03% +1.03 CCC CCC Intelligent Solutions Ho Add +47.4% 4.30% +0.83 V Visa Inc. Class A Add +22.9% 5.02% +0.76 MKL Markel Group Inc. Add +4.4% 12.12% +0.40 AKRE Akre Focus ETF Add +13.6% 0.24% +0.00 CPRT Copart Inc. Add +5.7% 6.18% −0.02
All Filings Quarter Positions 13F Reported Value Top Holdings Q2 2026 30 $152.5M MKL, AMZN, ORLY, CPRT, AMT Q1 2026 26 $148.3M MKL, AMT, ORLY, AMZN, MSFT Q4 2025 30 $165.0M MKL, AMZN, MSFT, AMT, ORLY Q3 2025 29 $169.4M MSFT, ORLY, AMT, MKL, AMZN Q2 2025 27 $175.7M AMT, MKL, AMZN, MSFT, ORLY Q1 2025 24 $163.4M AMT, MKL, ORLY, AMZN, BRK.B Q4 2024 24 $175.9M MKL, MSFT, AMZN, AMT, ORLY