DOSSIER · 13F-HR · Q2 2026

MARSHFIELD ASSOCIATES

$4.3B in tracked AUM across 17 positions as of Q2 2026.

MA
CIK 0000914976 · last filed Jun 30, 2026
Total AUM
$4.3B
as of Q2 2026
Holdings
17
positions
Whale Score
74
74
strong
Activity
no data
changes this Q
AI Analysis · Q2 2026

Comprehensive Analysis of Marshfield Associates SEC 13F Filing Report Period: Q3 2025 (Ending September 30, 2025)

1. Portfolio Overview

Marshfield Associates has undergone a significant transformation in the portfolio composition during the quarter ending September 30, 2025. The firm executed a substantial reduction in portfolio size, with total assets under management (AUM) decreasing by 48.0%, dropping from $4.89 billion to $2.54 billion. This drastic reduction was driven primaril...

Consequently, the portfolio has become extremely concentrated. The number of holdings was reduced to just 8 securities, resulting in an average position size of roughly 31.8%. This indicates a shift toward a "high-conviction" strategy where capital is deployed only into the firm's best ideas, rather than maintaining a diversified basket of stocks. The portfolio is currently heavily skewed toward large-cap, high-quality U.S. equities.

2. Key Holdings

The portfolio is dominated by a select group of "Compounder" stocks—companies with strong cash flows, wide economic moats, and histories of capital appreciation.

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
UNH
UNITEDHEALTH GROUP INC
$634M1.5M14.9%
02
PGR
PROGRESSIVE CORP
$470M2.2M11.0%
03
AZO
AUTOZONE INC
$436M136K10.2%
04
V
VISA INC
$355M1.0M8.3%
05
G0450A105
ARCH CAP GROUP LTD
$323M3.3M7.6%
06
MA
MASTERCARD INCORPORATED
$294M572K6.9%
07
EXPD
EXPEDITORS INTL WASH INC
$253M1.6M5.9%
08
ORLY
OREILLY AUTOMOTIVE INC
$252M2.7M5.9%
09
MCO
MOODYS CORP
$191M423K4.5%
10
DPZ
DOMINOS PIZZA INC
$189M639K4.4%

Filing history

2026Q2Jun 30
$4.3B 14.6%
17 positionsView →
2026Q1Mar 31
$5.0B 12.5%
17 positionsView →
2025Q4Dec 31
$5.7B 124.3%
17 positionsView →
2025Q3Sep 30
$2.5B 48.0%
8 positionsView →
2025Q2Jun 30
$4.9B 6.0%
19 positionsLocked
2025Q1Mar 31
$4.6B 0.0%
18 positionsLocked
2024Q4Dec 31
$4.6B 2.1%
18 positionsLocked
2024Q3Sep 30
$4.7B 4.2%
19 positionsLocked
2024Q2Jun 30
$4.5B 7.2%
19 positionsLocked
2024Q1Mar 31
$4.9B 1.0%
19 positionsLocked
2023Q4Dec 31
$4.9B 21.8%
21 positionsLocked
2023Q3Sep 30
$4.0B 5.1%
22 positionsLocked
Showing 12 of 93