CarMax, Inc.
MX ˙ BMV ˙ US1431301027
SecurityMX:KMX / CarMax, Inc.
InstitutionWinton Capital Group Ltd
Latest Disclosed Ownership13,803 shares
Latest Disclosed Value $ 573,929
Winton Capital Group Ltd ownership in KMX / CarMax, Inc.

On May 12, 2026 - Winton Capital Group Ltd filed a 13F-HR form disclosing ownership of 13,803 shares of CarMax, Inc. (MX:KMX) valued at $573,929 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 11, 2026 disclosing 0 shares of CarMax, Inc..

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

Upgrade to unlock premium data and export to Excel .

Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-12 2026-03-31 13F CARMAX COM 143130102 13,803 13,803 574 0.0201
2026-02-11 2025-12-31 13F CARMAX COM 143130102 0 -24,985 -100.00 0 -100.00
2025-11-13 2025-09-30 13F CARMAX COM 143130102 24,985 16,616 198.54 1,121 99.47 0.0420
2025-08-14 2025-06-30 13F CARMAX COM 143130102 8,369 -7,121 -45.97 562 -53.40 0.0287
2025-05-15 2025-03-31 13F CARMAX COM 143130102 15,490 141 0.92 1,207 -3.83 0.0735
2025-02-12 2024-12-31 13F CARMAX COM 143130102 15,349 1,652 12.06 1,255 18.41 0.0833
2024-11-12 2024-09-30 13F CARMAX COM 143130102 13,697 5,665 70.53 1,060 79.80 0.0743
2024-08-09 2024-06-30 13F CARMAX COM 143130102 8,032 -6,798 -45.84 589 -54.38 0.0398
2024-05-14 2024-03-31 13F CARMAX COM 143130102 14,830 7,802 111.01 1,292 139.52 0.0912
2024-02-12 2023-12-31 13F CARMAX COM 143130102 7,028 -962 -12.04 539 -4.60 0.0393
2023-11-13 2023-09-30 13F CARMAX COM 143130102 7,990 4,933 161.37 565 121.57 0.0466
2023-08-14 2023-06-30 13F CARMAX COM 143130102 3,057 3,057 256 0.0214
2022-05-11 2022-03-31 13F CARMAX COM 143130102 0 -5,213 -100.00 0 -100.00
2022-02-10 2021-12-31 13F CARMAX COM 143130102 5,213 -2,493 -32.35 679 -31.14 0.0411
2021-10-28 2021-09-30 13F CARMAX COM 143130102 7,706 -4,889 -38.82 986 -39.40 0.0552
2021-08-10 2021-06-30 13F CARMAX COM 143130102 12,595 -666 -5.02 1,627 -7.50 0.0874
2021-07-21 2021-03-31 13F CARMAX COM 143130102 13,261 -2,355 -15.08 1,759 19.25 0.1004
2021-02-12 2020-12-31 13F CARMAX COM 143130102 15,616 -50,655 -76.44 1,475 -75.78 0.1065
2020-10-30 2020-09-30 13F CARMAX COM 143130102 66,271 -8,845 -11.78 6,091 -9.45 0.1980
2020-08-05 2020-06-30 13F CARMAX COM 143130102 75,116 3,179 4.42 6,727 73.73 0.1736
2020-05-11 2020-03-31 13F CARMAX COM 143130102 71,937 -72,920 -50.34 3,872 -69.51 0.1022
2020-02-13 2019-12-31 13F CARMAX COM 143130102 144,857 -415,137 -74.13 12,700 -74.23 0.1782
2019-11-08 2019-09-30 13F CARMAX COM 143130102 559,994 96,847 20.91 49,279 22.54 0.5827
2019-07-08 2019-06-30 13F CARMAX COM 143130102 463,147 463,147 40,215 0.7817
2019-05-13 2019-03-31 13F CARMAX COM 143130102 0 -167,986 -100.00 0 -100.00
2019-02-05 2018-12-31 13F CARMAX COM 143130102 167,986 167,986 10,538 0.2270
2018-11-02 2018-09-30 13F CARMAX COM 143130102 0 -79,065 -100.00 0 -100.00
2018-08-20 2018-06-30 13F CARMAX COM 143130102 79,065 -12,589 -13.74 5,761 1.48 0.1472
2018-05-21 2018-03-31 13F CARMAX COM 143130102 91,654 2,337 2.62 5,677 -0.89 0.1603
2018-02-13 2017-12-31 13F CARMAX COM 143130102 89,317 85,840 2,468.79 5,728 2,069.70 0.1658
2017-11-13 2017-09-30 13F CARMAX COM 143130102 3,477 -29,553 -89.47 264 -87.33 0.0084
2017-08-17 2017-06-30 13F CARMAX COM 143130102 33,030 33,030 2,083 0.0612
2015-11-10 2015-09-30 13F CARMAX COM 143130102 0 -119,625 -100.00 0 -100.00
2015-08-06 2015-06-30 13F CARMAX COM 143130102 119,625 103,429 638.61 7,920 608.41 0.0727
2015-05-12 2015-03-31 13F CARMAX COM 143130102 16,196 16,196 1,118 0.0089
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.