13F Insight
DOSSIER · 13F-HR · Q2 2026

Rockbridge Capital Management LLC

$155M in tracked AUM across 31 positions as of Q2 2026.

RC
CIK 0002056320 · last filed Jun 30, 2026
Total AUM
$155M
as of Q2 2026
Holdings
31
—
positions
Whale Score
64
64
tracked
Activity
—
no data
changes this Q
AI Analysis · Q2 2026

Based on the SEC 13F filing data provided for Rockbridge Capital Management LLC as of September 30, 2025, here is a comprehensive analysis of the portfolio.

Portfolio Overview

Rockbridge Capital Management LLC manages a concentrated portfolio valued at approximately $73.85 million, spread across just 15 holdings. This indicates a high-conviction investment strategy characterized by low turnover and a preference for selecting a limited set of high-quality names rather than broad diversificat...

Key Holdings

The portfolio is dominated by a few massive positions, reflecting a "barbell" approach where the top holdings drive performance. The two largest positions, O'Reilly Automotive (ORLY) and American Tower Corp (AMT), are nearly equal in weight, representing 23.63% and 23.48% of the portfolio, respectively. Together, these two positions account for nearly half (47.1%) of the total assets under management.

The top five holdings are all dominant players in their respective industries:

  1. ORLY ($17.45M): A leading auto parts retailer, representing the firm's largest bet on the Consumer Cyclical sector.
  2. AMT ($17.34M): A global leader in real estate investment trusts (REITs) specializing in data centers and wireless towers.
  3. Mastercard (MA) ($10.34M): A payments giant comprising 14.0% of the portfolio.
  4. Alphabet (GOOGL) ($5.27M): The top communication services holding, accounting for 7.13%.
  5. Visa (V) ($5.03M): Complementing Mastercard, Visa adds another 6.81% exposure to the payments network.
Analysis generated by 13F Insight from SEC Form 13F filing data · Q2 2026. Methodology

Quarter at a glance — Q2 2026

Position-change comparison pending.

No quarter-over-quarter changes available.

Top 10 holdings

By portfolio weight as of Q2 2026.

#HoldingValueSharesWeight
01
MKL
Markel Group Inc
$19M10K12.1%02
AMZN
Amazon.Com Inc
$15M61K9.4%03
ORLY
O'Reilly Automotive Inc
$13M144K8.5%04
CPRT
Copart Inc
$13M463K8.4%05
AMT
American Tower Corp
$13M79K8.3%06
MSFT
Microsoft Corp
$11M31K7.4%07
BRK/B
Berkshire Hathaway Inc Cl B Ne
$11M23K7.3%08
AAPL
Apple Inc
$10M34K6.3%09
MA
Mastercard Incorporated Cl A
$8M16K5.3%10
LMT
Lockheed Martin Corp
$8M16K5.2%

Filing history

2026Q2Jun 30
$155M▲ 4.2%
31 positionsView →2026Q1Mar 31
$149M▼ 10.1%
27 positionsView →2025Q4Dec 31
$166M▲ 124.3%
31 positionsView →2025Q3Sep 30
$74M▼ 5.5%
15 positionsView →2025Q2Jun 30
$78M▲ 10.0%
14 positionsLocked2025Q1Mar 31
$71M▼ 59.6%
13 positionsLocked2024Q4Dec 31
$176M—
24 positionsLocked