CIK: 0000914976
Total reported value
$5.0B
Reporting period: 2026-03-31 · Number of holdings: 17
MARSHFIELD ASSOCIATES disclosed 17 holdings in its latest 13F filing for the period ending 2026-03-31, with total reported value of $5.0B and a quarterly turnover rate of 14.7%.
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Marshfield Associates's disclosed holdings carry a Herfindahl concentration index of 0.071 — mathematically equivalent to about 14 equally-sized positions, close to its 17 actual disclosed holdings. Value is spread relatively evenly across the portfolio rather than concentrated in a handful of names.
Position sizes are fairly uniform across the portfolio (a coefficient of variation of 0.47), 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 6.9 percentage-point tilt) — a pattern consistent with a momentum-following approach.
Trim CMI
-41.2% -$148.4M
Add V
+22.0% $18.4M
Add ACGL
+5.7% $16.0M
Trim STRA
-46.4% -$52.8M
Add AZO
-5.7% -$35.8M
Trim ROST
-33.0% -$95.0M
| # | Ticker | Issuer | Asset Subclass | Weight | Weight Change | Shares Change | 4Q Trend |
|---|---|---|---|---|---|---|---|
| 1 | AZO | Autozone INC | Stock-Consumer Disc | 11.16% | +0.76% | -5.65% | |
| 2 | UNH | Unitedhealth Group INC | Stock-Healthcare | 10.25% | +0.65% | +14.00% | |
| 3 | PGR | Progressive CORP | Stock-Financials | 9.75% | -0.33% | -2.79% | |
| 4 | ROST | Ross Stores INC | Stock-Consumer Disc | 7.89% | -0.68% | -32.99% | |
| 5 | V | Visa Inc-class A Shares | Stock-Financials | 7.60% | +1.27% | +21.96% | |
| 6 | ORLY | O'reilly Automotive INC | Stock-Consumer Disc | 6.50% | +0.25% | -10.06% | |
| 7 | MA | Mastercard INC - A | Stock-Financials | 6.01% | -0.26% | -4.23% | |
| 8 | ACGL | Arch Capital Group Ltd. | Stock-Financials | 5.87% | +1.02% | +5.70% | |
| 9 | EXPD | Expeditors Intl Wash INC | Stock-Industrials | 5.60% | +0.24% | -4.85% | |
| 10 | DPZ | Domino's Pizza INC | Stock-Consumer Disc | 5.43% | -0.31% | -3.80% | |
| 11 | CMI | Cummins INC | Stock-Industrials | 4.84% | -1.99% | -41.23% | |
| 12 | MCO | Moody's CORP | Stock-Financials | 4.71% | -0.34% | -4.36% | |
| 13 | TJX | Tjx Companies INC | Stock-Consumer Disc | 3.49% | +0.34% | -6.65% | |
| 14 | NVR | Nvr INC | Stock-Consumer Disc | 3.35% | -0.07% | -5.35% | |
| 15 | DIS | Walt Disney Co/the | Stock-Comm Services | 3.17% | -0.21% | -3.09% | |
| 16 | FAST | Fastenal Co | Stock-Industrials | 3.08% | +0.44% | -11.74% | |
| 17 | STRA | Strategic Education INC | Stock-Other | 1.32% | -0.76% | -46.37% |
Performance for Q3 2026
+3.7%
Performance Last 4 Quarters
+9.6%
Based on 82% of reported portfolio value with available pricing
| Period | Holdings | Total value | Stability | Top holdings |
|---|---|---|---|---|
| 2026-03-31 | 17 | $5.0B | 15 | |
| 2025-12-31 | 17 | $5.7B | 15 | |
| 2025-09-30 | 17 | $5.8B | 24 | |
| 2025-06-30 | 19 | $4.9B | 0 | |
| 2025-03-31 | 18 | $4.6B | 100 | |
| 2024-12-31 | 18 | $4.6B | 0 | |
| 2024-09-30 | 19 | $4.7B | 0 | |
| 2024-06-30 | 19 | $4.5B | 0 | |
| 2024-03-31 | 19 | $4.9B | 0 | |
| 2023-12-31 | 21 | $4.9B | 0 | |
| 2023-09-30 | 22 | $4.0B | 0 | |
| 2023-06-30 | 21 | $3.8B | 0 | |
| 2023-03-31 | 20 | $3.4B | 0 | |
| 2022-12-31 | 17 | $3.2B | 0 | |
| 2022-09-30 | 17 | $2.6B | 0 | |
| 2022-06-30 | 17 | $2.6B | 0 | |
| 2022-03-31 | 17 | $2.5B | 0 | |
| 2021-12-31 | 16 | $2.5B | 0 | |
| 2021-09-30 | 16 | $2.3B | 0 | |
| 2021-06-30 | 17 | $2.4B | 93 | |
| 2021-03-31 | 17 | $2.1B | 14 | |
| 2020-12-31 | 17 | $2.1B | 12 | |
| 2020-09-30 | 18 | $2.1B | 15 | |
| 2020-06-30 | 18 | $1.9B | 19 | |
| 2020-03-31 | 18 | $1.6B | 25 | |
| 2019-12-31 | 17 | $1.9B | 19 | |
| 2019-09-30 | 17 | $1.6B | 6 | |
| 2019-06-30 | 18 | $1.6B | 15 | |
| 2019-03-31 | 18 | $1.6B | 21 | |
| 2018-12-31 | 18 | $1.4B | 13 | |
| 2018-09-30 | 18 | $1.6B | 18 | |
| 2018-06-30 | 19 | $1.5B | 10 | |
| 2018-03-31 | 19 | $1.5B | 10 | |
| 2017-12-31 | 19 | $1.5B | 13 | |
| 2017-09-30 | 19 | $1.5B | 13 | |
| 2017-06-30 | 21 | $1.3B | 11 | |
| 2017-03-31 | 19 | $1.3B | 14 | |
| 2016-12-31 | 20 | $1.3B | 14 | |
| 2016-09-30 | 19 | $1.3B | 12 | |
| 2016-06-30 | 22 | $1.4B | 11 | |
| 2016-03-31 | 22 | $1.4B | 15 | |
| 2015-12-31 | 23 | $1.4B | 9 | |
| 2015-09-30 | 23 | $1.3B | 19 | |
| 2015-06-30 | 23 | $1.3B | 12 | |
| 2015-03-31 | 23 | $1.3B | 10 | |
| 2014-12-31 | 24 | $1.4B | 7 | |
| 2014-09-30 | 24 | $1.3B | 100 | |
| 2014-06-30 | 23 | $1.4B | 100 | |
| 2014-03-31 | 25 | $1.4B | 7 | |
| 2013-12-31 | 25 | $1.3B | 12 | |
| 2013-09-30 | 27 | $1.3B | 12 | |
| 2013-06-30 | 27 | $1.3B | 0 |
Marshfield Associates's most significant position changes for 2026-03-31: Trim: Cummins INC (CMI) — shares -41.23%; Add: Visa Inc-class A Shares (V) — shares +21.96%; Add: Arch Capital Group Ltd. (ACGL) — shares +5.70%; Trim: Strategic Education INC (STRA) — shares -46.37%; Trim: Autozone INC (AZO) — shares -5.65%.
| # | Ticker | Issuer | Weight Change | Shares Change | Action |
|---|---|---|---|---|---|
| 1 | V | Visa Inc-class A Shares | +1.3% | +21.96% | Add |
| 2 | ACGL | Arch Capital Group Ltd. | +1% | +5.70% | Add |
| 3 | AZO | Autozone INC | +0.8% | -5.65% | Trim |
| 4 | UNH | Unitedhealth Group INC | +0.7% | +14.00% | Add |
| 5 | FAST | Fastenal Co | +0.4% | -11.74% | Trim |
| 6 | TJX | Tjx Companies INC | +0.3% | -6.65% | Trim |
| 7 | ORLY | O'reilly Automotive INC | +0.3% | -10.06% | Trim |
| 8 | EXPD | Expeditors Intl Wash INC | +0.2% | -4.85% | Trim |
| 9 | NVR | Nvr INC | -0.1% | -5.35% | Trim |
| 10 | DIS | Walt Disney Co/the | -0.2% | -3.09% | Trim |
| 11 | MA | Mastercard INC - A | -0.3% | -4.23% | Trim |
| 12 | DPZ | Domino's Pizza INC | -0.3% | -3.80% | Trim |
| 13 | PGR | Progressive CORP | -0.3% | -2.79% | Trim |
| 14 | MCO | Moody's CORP | -0.3% | -4.36% | Trim |
| 15 | ROST | Ross Stores INC | -0.7% | -32.99% | Trim |
| 16 | STRA | Strategic Education INC | -0.8% | -46.37% | Trim |
| 17 | CMI | Cummins INC | -2% | -41.23% | Trim |
| Period | Filed | Type | EDGAR |
|---|---|---|---|
| 2026-03-31 | 2026-05-15 | 13F-HR | View on EDGAR |
| 2025-12-31 | 2026-02-17 | 13F-HR | View on EDGAR |
| 2025-09-30 | 2025-11-14 | 13F-HR | View on EDGAR |
| 2025-06-30 | 2025-08-14 | 13F-HR | View on EDGAR |
| 2025-03-31 | 2025-05-15 | 13F-HR | View on EDGAR |
| 2024-12-31 | 2025-02-14 | 13F-HR | View on EDGAR |
| 2024-09-30 | 2024-11-15 | 13F-HR | View on EDGAR |
| 2024-06-30 | 2024-08-14 | 13F-HR | View on EDGAR |
| 2024-03-31 | 2024-05-15 | 13F-HR | View on EDGAR |
| 2023-12-31 | 2024-02-14 | 13F-HR | View on EDGAR |
| 2023-09-30 | 2023-11-14 | 13F-HR | View on EDGAR |
| 2023-06-30 | 2023-08-14 | 13F-HR | View on EDGAR |
| 2023-03-31 | 2023-05-15 | 13F-HR | View on EDGAR |
| 2022-12-31 | 2023-05-09 | Amendment | View on EDGAR |
| 2022-12-31 | 2023-02-14 | 13F-HR | View on EDGAR |
| 2022-09-30 | 2023-05-09 | Amendment | View on EDGAR |
| 2022-09-30 | 2022-11-14 | 13F-HR | View on EDGAR |
| 2022-06-30 | 2023-05-09 | Amendment | View on EDGAR |
| 2022-06-30 | 2022-08-12 | 13F-HR | View on EDGAR |
| 2022-03-31 | 2023-05-09 | Amendment | View on EDGAR |
| 2022-03-31 | 2022-05-13 | 13F-HR | View on EDGAR |
| 2021-12-31 | 2023-05-09 | Amendment | View on EDGAR |
| 2021-12-31 | 2022-02-14 | 13F-HR | View on EDGAR |
| 2021-09-30 | 2023-05-09 | Amendment | View on EDGAR |
| 2021-09-30 | 2021-11-15 | 13F-HR | View on EDGAR |
| 2021-06-30 | 2023-05-09 | Amendment | View on EDGAR |
| 2021-06-30 | 2021-08-16 | 13F-HR | View on EDGAR |
| 2021-03-31 | 2023-05-09 | Amendment | View on EDGAR |
| 2021-03-31 | 2021-05-17 | 13F-HR | View on EDGAR |
| 2020-12-31 | 2023-05-09 | Amendment | View on EDGAR |
| 2020-12-31 | 2021-02-16 | 13F-HR | View on EDGAR |
| 2020-09-30 | 2023-05-09 | Amendment | View on EDGAR |
| 2020-09-30 | 2020-11-13 | 13F-HR | View on EDGAR |
| 2020-06-30 | 2023-05-09 | Amendment | View on EDGAR |
| 2020-06-30 | 2020-08-14 | 13F-HR | View on EDGAR |
| 2020-03-31 | 2023-05-09 | Amendment | View on EDGAR |
| 2020-03-31 | 2020-05-15 | 13F-HR | View on EDGAR |
| 2019-12-31 | 2023-05-09 | Amendment | View on EDGAR |
| 2019-12-31 | 2020-02-18 | 13F-HR | View on EDGAR |
| 2019-09-30 | 2023-05-09 | Amendment | View on EDGAR |
| 2019-09-30 | 2019-11-15 | 13F-HR | View on EDGAR |
| 2019-06-30 | 2023-05-09 | Amendment | View on EDGAR |
| 2019-06-30 | 2019-08-15 | 13F-HR | View on EDGAR |
| 2019-03-31 | 2023-05-09 | Amendment | View on EDGAR |
| 2019-03-31 | 2019-05-16 | 13F-HR | View on EDGAR |
| 2018-12-31 | 2023-05-09 | Amendment | View on EDGAR |
| 2018-12-31 | 2019-02-15 | 13F-HR | View on EDGAR |
| 2018-09-30 | 2023-05-09 | Amendment | View on EDGAR |
| 2018-09-30 | 2018-11-16 | 13F-HR | View on EDGAR |
| 2018-06-30 | 2023-05-09 | Amendment | View on EDGAR |
| 2018-06-30 | 2018-08-15 | 13F-HR | View on EDGAR |
| 2018-03-31 | 2023-05-09 | Amendment | View on EDGAR |
| 2018-03-31 | 2018-05-15 | 13F-HR | View on EDGAR |
| 2017-12-31 | 2018-02-15 | 13F-HR | View on EDGAR |
| 2017-09-30 | 2017-11-15 | 13F-HR | View on EDGAR |
| 2017-06-30 | 2017-08-15 | 13F-HR | View on EDGAR |
| 2017-03-31 | 2017-05-17 | 13F-HR | View on EDGAR |
| 2016-12-31 | 2017-02-15 | 13F-HR | View on EDGAR |
| 2016-09-30 | 2016-11-15 | 13F-HR | View on EDGAR |
| 2016-06-30 | 2016-08-15 | 13F-HR | View on EDGAR |
| 2016-03-31 | 2016-05-16 | 13F-HR | View on EDGAR |
| 2015-12-31 | 2016-02-16 | 13F-HR | View on EDGAR |
| 2015-09-30 | 2015-11-13 | 13F-HR | View on EDGAR |
| 2015-06-30 | 2015-08-14 | 13F-HR | View on EDGAR |
| 2015-03-31 | 2015-05-15 | 13F-HR | View on EDGAR |
| 2014-12-31 | 2015-02-13 | 13F-HR | View on EDGAR |
| 2014-09-30 | 2014-11-14 | 13F-HR | View on EDGAR |
| 2014-06-30 | 2014-08-13 | 13F-HR | View on EDGAR |
| 2014-03-31 | 2014-05-14 | 13F-HR | View on EDGAR |
| 2013-12-31 | 2014-02-14 | 13F-HR | View on EDGAR |
| 2013-09-30 | 2013-11-14 | 13F-HR | View on EDGAR |
| 2013-06-30 | 2013-08-13 | 13F-HR | View on EDGAR |
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