CarMax, Inc.
US ˙ NYSE ˙ US1431301027

SecurityKMX / CarMax, Inc.
InstitutionMount Capital Ltd
Latest Disclosed Ownership410,400 shares
Latest Disclosed Value $ 17,064,432
Mount Capital Ltd ownership in KMX / CarMax, Inc.

On May 14, 2026 - Mount Capital Ltd filed a 13F-HR form disclosing ownership of 410,400 shares of CarMax, Inc. (US:KMX) valued at $17,064,432 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 11, 2026 disclosing 410,400 shares of CarMax, Inc.. This represents a change in shares of 0.00% during the quarter. The current value of the position is $19,348,308 USD.

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.

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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)
2026-05-14 2026-03-31 13F CARMAX COM 143130102 410,400 0 0.00 17,064 7.61 6.8759
2026-02-11 2025-12-31 13F CARMAX COM 143130102 410,400 -410,400 -50.00 15,858 -56.94 6.4063
2026-02-11 2025-12-31 13F CARMAX COM 143130102 410,400 15,858
2026-02-11 2025-12-31 13F CARMAX COM 143130102 410,400 15,858
2025-11-13 2025-09-30 13F CARMAX COM 143130102 820,800 381,700 86.93 36,829 24.80 13.2107
2025-08-13 2025-06-30 13F CARMAX COM 143130102 439,100 96,400 28.13 29,512 10.52 9.5132
2025-05-15 2025-03-31 13F CARMAX COM 143130102 342,700 0 0.00 26,703 -4.70 8.6055
2025-02-13 2024-12-31 13F CARMAX COM 143130102 342,700 96,200 39.03 28,019 47.01 9.9390
2024-11-13 2024-09-30 13F CARMAX COM 143130102 246,500 97,200 65.10 19,059 74.07 6.6741
2024-08-09 2024-06-30 13F CARMAX COM 143130102 149,300 149,300 10,950 4.3879
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.