CarMax, Inc.
MX ˙ BMV ˙ US1431301027
SecurityMX:KMX / CarMax, Inc.
InstitutionCapital Fund Management S.a.
Latest Disclosed Ownership25,851 shares
Latest Disclosed Value $ 1,074,884
Capital Fund Management S.a. ownership in KMX / CarMax, Inc.

On May 14, 2026 - Capital Fund Management S.a. filed a 13F-HR form disclosing ownership of 25,851 shares of CarMax, Inc. (MX:KMX) valued at $1,074,884 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 537,353 shares of CarMax, Inc.. This represents a change in shares of -95.19% during the quarter.

Capital Fund Management S.a. has a history of taking positions in derivatives of the underlying security (KMX) in the form of stock options. The firm currently holds call options representing 103,200 of underlying shares valued at $4,291,056 USD and put options representing 147,700 of underlying shares valued at $6,141,366 USD .

Note: prior versions of this page mistakenly stated that the share values represented the number of options, not the number of underlying shares. For more information on the data backing these reports, please see the SEC document Frequently Asked Questions About Form 13F.

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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Institutional Put/Call Ratios
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In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

MX:KMX / CarMax, Inc. Historical Put/Call Ratio
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 INC COM CARMAX INC COM 143130102 25,851 -511,502 -95.19 1,075 -94.83 0.0049
2026-02-17 2025-12-31 13F CARMAX INC COM CARMAX INC COM 143130102 537,353 239,824 80.61 20,763 55.53 0.0577
2025-11-13 2025-09-30 13F CARMAX COM 143130102 297,529 -60,788 -16.96 13,350 -44.56 0.0350
2025-08-13 2025-06-30 13F CARMAX COM 143130102 358,317 358,317 24,082 0.0663
2024-05-15 2024-03-31 13F CARMAX COM 143130102 0 -20,880 -100.00 0 -100.00
2024-02-14 2023-12-31 13F CARMAX COM 143130102 20,880 -55,488 -72.66 1,602 -70.34 0.0043
2023-11-14 2023-09-30 13F CARMAX COM 143130102 76,368 76,368 5,402 0.0187
2021-05-14 2021-03-31 13F CARMAX COM 143130102 0 -13,283 -100.00 0 -100.00
2021-02-12 2020-12-31 13F CARMAX COM 143130102 13,283 13,283 1,255 0.0118
2020-05-13 2020-03-31 13F Carmax COM 143130102 0 -49,523 -100.00 0 -100.00
2020-02-13 2019-12-31 13F Carmax COM 143130102 49,523 49,523 4,342 0.0342
2016-05-02 2016-03-31 13F Carmax COM 143130102 0 0 0 0.0000
2016-01-28 2015-12-31 13F Carmax COM 143130102 0 -168,439 -100.00 0 -100.00
2015-10-27 2015-09-30 13F Carmax COM 143130102 168,439 151,799 912.25 9,992 806.72 0.1117
2015-07-28 2015-06-30 13F Carmax COM 143130102 16,640 10,911 190.45 1,102 309.67 0.0140
2014-01-31 2013-12-31 13F Carmax COM 143130102 5,729 -19,842 -77.60 269 -78.29 0.0033
2013-10-31 2013-09-30 13F Carmax COM 143130102 25,571 -64,553 -71.63 1,239 -70.22 0.0171
2013-07-31 2013-06-30 13F Carmax COM 143130102 90,124 90,124 4,160 0.0635
Disclosed Call Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share
Price
Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2026-05-14 2026-03-31 13F CARMAX INC COM CARMAX INC COM Call 103,200 -43.48 4,291 -39.18 n/a n/a n/a
2026-02-17 2025-12-31 13F CARMAX INC COM CARMAX INC COM Call 182,600 -14.51 7,056 -26.39 n/a n/a n/a
2025-11-13 2025-09-30 13F CARMAX COM Call 213,600 188.26 9,584 92.45 n/a n/a n/a
2025-08-13 2025-06-30 13F CARMAX COM Call 74,100 244.65 4,980 197.31 n/a n/a n/a
2025-05-14 2025-03-31 13F CARMAX COM Call 21,500 -52.01 1,675 -54.26 n/a n/a n/a
2025-02-13 2024-12-31 13F CARMAX COM Call 44,800 53.42 3,663 62.11 n/a n/a n/a
2024-11-13 2024-09-30 13F CARMAX COM Call 29,200 -39.17 2,259 -35.82 n/a n/a n/a
2024-08-13 2024-06-30 13F CARMAX COM Call 48,000 -68.36 3,520 -73.36 n/a n/a n/a
2024-05-15 2024-03-31 13F CARMAX COM Call 151,700 -8.67 13,215 3.67 n/a n/a n/a
2024-02-14 2023-12-31 13F CARMAX COM Call 166,100 24.33 12,747 34.89 n/a n/a n/a
2023-11-14 2023-09-30 13F CARMAX COM Call 133,600 16.99 9,450 -1.14 n/a n/a n/a
2023-08-14 2023-06-30 13F CARMAX COM Call 114,200 -56.35 9,559 -43.16 n/a n/a n/a
2023-05-15 2023-03-31 13F CARMAX COM Call 261,600 11.27 16,816 17.46 n/a n/a n/a
2023-02-13 2022-12-31 13F CARMAX COM Call 235,100 428.31 14,315 387.40 n/a n/a n/a
2022-11-14 2022-09-30 13F CARMAX COM Call 44,500 16.49 2,938 -15.02 n/a n/a n/a
2022-08-12 2022-06-30 13F CARMAX COM Call 38,200 -36.75 3,456 -40.69 n/a n/a n/a
2022-05-12 2022-03-31 13F CARMAX COM Call 60,400 5,827 n/a n/a n/a
2022-02-10 2021-12-31 13F CARMAX COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2021-11-12 2021-09-30 13F CARMAX COM Call 33,400 -24.43 4,274 -25.14 n/a n/a n/a
2021-08-12 2021-06-30 13F CARMAX COM Call 44,200 5,708 n/a n/a n/a
2021-05-14 2021-03-31 13F CARMAX COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2021-02-12 2020-12-31 13F CARMAX COM Call 20,300 -12.12 1,918 -9.70 n/a n/a n/a
2020-11-13 2020-09-30 13F CARMAX COM Call 23,100 13.79 2,123 10.75 n/a n/a n/a
2020-08-13 2020-06-30 13F Carmax COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2020-05-13 2020-03-31 13F Carmax COM Call 34,600 380.56 1,863 195.25 n/a n/a n/a
2020-02-13 2019-12-31 13F Carmax COM Call 7,200 -90.11 631 -90.15 n/a n/a n/a
2019-11-13 2019-09-30 13F Carmax COM Call 72,800 107.41 6,406 110.17 n/a n/a n/a
2019-08-12 2019-06-30 13F Carmax COM Call 35,100 -51.79 3,048 -52.42 n/a n/a n/a
2019-02-13 2018-12-31 13F Carmax COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2018-11-14 2018-09-30 13F Carmax COM Call 4,400 -60.71 329 -59.68 n/a n/a n/a
2018-08-14 2018-06-30 13F Carmax COM Call 11,200 154.55 816 148.02 n/a n/a n/a
2018-05-15 2018-03-31 13F Carmax COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2018-02-09 2017-12-31 13F Carmax COM Call 3,600 -88.89 231 -90.59 n/a n/a n/a
2017-11-13 2017-09-30 13F Carmax COM Call 32,400 105.06 2,456 146.59 n/a n/a n/a
2017-08-10 2017-06-30 13F Carmax COM Call 15,800 27.42 996 35.69 n/a n/a n/a
2017-05-03 2017-03-31 13F Carmax COM Call 12,400 -38.92 734 -43.84 n/a n/a n/a
2017-02-08 2016-12-31 13F Carmax COM Call 20,300 -36.36 1,307 -23.21 n/a n/a n/a
2016-10-31 2016-09-30 13F Carmax COM Call 31,900 -54.23 1,702 -50.19 n/a n/a n/a
2016-07-27 2016-06-30 13F Carmax COM Call 69,700 100.29 3,417 92.18 n/a n/a n/a
2016-05-02 2016-03-31 13F Carmax COM Call 34,800 480.00 1,778 448.77 n/a n/a n/a
2016-01-28 2015-12-31 13F Carmax COM Call 6,000 -7.69 324 -16.06 n/a n/a n/a
2015-10-27 2015-09-30 13F Carmax COM Call 6,500 386 n/a n/a n/a
Disclosed Put Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share Price Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2026-05-14 2026-03-31 13F CARMAX INC COM CARMAX INC COM Put 147,700 -24.49 6,141 -18.74 n/a n/a n/a
2026-02-17 2025-12-31 13F CARMAX INC COM CARMAX INC COM Put 195,600 82.63 7,558 57.27 n/a n/a n/a
2025-11-13 2025-09-30 13F CARMAX COM Put 107,100 117.68 4,806 45.34 n/a n/a n/a
2025-08-13 2025-06-30 13F CARMAX COM Put 49,200 3,307 n/a n/a n/a
2025-05-14 2025-03-31 13F CARMAX COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2025-02-13 2024-12-31 13F CARMAX COM Put 48,000 14.56 3,924 21.04 n/a n/a n/a
2024-11-13 2024-09-30 13F CARMAX COM Put 41,900 -7.10 3,242 -1.97 n/a n/a n/a
2024-08-13 2024-06-30 13F CARMAX COM Put 45,100 -51.66 3,308 -59.31 n/a n/a n/a
2024-05-15 2024-03-31 13F CARMAX COM Put 93,300 -25.83 8,127 -15.81 n/a n/a n/a
2024-02-14 2023-12-31 13F CARMAX COM Put 125,800 15.62 9,654 25.45 n/a n/a n/a
2023-11-14 2023-09-30 13F CARMAX COM Put 108,800 -27.42 7,695 -38.67 n/a n/a n/a
2023-08-14 2023-06-30 13F CARMAX COM Put 149,900 -71.14 12,547 -62.42 n/a n/a n/a
2023-05-15 2023-03-31 13F CARMAX COM Put 519,400 96.30 33,387 107.23 n/a n/a n/a
2023-02-13 2022-12-31 13F CARMAX COM Put 264,600 617.07 16,111 561.37 n/a n/a n/a
2022-11-14 2022-09-30 13F CARMAX COM Put 36,900 7.27 2,436 -21.72 n/a n/a n/a
2022-08-12 2022-06-30 13F CARMAX COM Put 34,400 -49.41 3,113 -52.56 n/a n/a n/a
2022-05-12 2022-03-31 13F CARMAX COM Put 68,000 535.51 6,561 370.93 n/a n/a n/a
2022-02-10 2021-12-31 13F CARMAX COM Put 10,700 -72.06 1,393 -71.57 n/a n/a n/a
2021-11-12 2021-09-30 13F CARMAX COM Put 38,300 -8.81 4,901 -9.66 n/a n/a n/a
2021-08-12 2021-06-30 13F CARMAX COM Put 42,000 69.35 5,424 64.91 n/a n/a n/a
2021-05-14 2021-03-31 13F CARMAX COM Put 24,800 -0.40 3,290 39.84 n/a n/a n/a
2021-02-12 2020-12-31 13F CARMAX COM Put 24,900 132.71 2,352 139.27 n/a n/a n/a
2020-11-13 2020-09-30 13F CARMAX COM Put 10,700 -57.03 983 -58.21 n/a n/a n/a
2020-08-13 2020-06-30 13F Carmax COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2020-05-13 2020-03-31 13F Carmax COM Put 38,500 342.53 2,072 171.56 n/a n/a n/a
2020-02-13 2019-12-31 13F Carmax COM Put 8,700 -85.50 763 -85.55 n/a n/a n/a
2019-11-13 2019-09-30 13F Carmax COM Put 60,000 200.00 5,280 203.97 n/a n/a n/a
2019-08-12 2019-06-30 13F Carmax COM Put 20,000 124.72 1,737 179.71 n/a n/a n/a
2019-05-13 2019-03-31 13F/A Carmax COM Put 8,900 -55.50 621 -64.25 n/a n/a n/a
2018-11-14 2018-09-30 13F Carmax COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2018-08-14 2018-06-30 13F Carmax COM Put 8,900 649 n/a n/a n/a
2018-05-15 2018-03-31 13F Carmax COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2018-02-09 2017-12-31 13F Carmax COM Put 6,100 -84.52 391 -86.91 n/a n/a n/a
2017-11-13 2017-09-30 13F Carmax COM Put 39,400 51.54 2,987 82.13 n/a n/a n/a
2017-08-10 2017-06-30 13F Carmax COM Put 26,000 73.33 1,640 84.68 n/a n/a n/a
2017-05-03 2017-03-31 13F Carmax COM Put 15,000 -57.14 888 -60.60 n/a n/a n/a
2017-02-08 2016-12-31 13F Carmax COM Put 35,000 215.32 2,254 280.74 n/a n/a n/a
2016-10-31 2016-09-30 13F Carmax COM Put 11,100 -79.06 592 -77.22 n/a n/a n/a
2016-07-27 2016-06-30 13F Carmax COM Put 53,000 60.12 2,599 53.70 n/a n/a n/a
2016-05-02 2016-03-31 13F Carmax COM Put 33,100 372.86 1,691 347.35 n/a n/a n/a
2016-01-28 2015-12-31 13F Carmax COM Put 7,000 -78.85 378 -77.65 n/a n/a n/a
2015-10-27 2015-09-30 13F Carmax COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2015-07-28 2015-06-30 13F Carmax COM Put 3,100 205 n/a n/a n/a
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.