카맥스(주)
US ˙ NYSE ˙ US1431301027

SecurityKMX / CarMax, Inc.
InstitutionMan Group plc
Latest Disclosed Ownership501,796 shares
Latest Disclosed Value $ 20,864,678
Man Group plc ownership in KMX / CarMax, Inc.

On May 15, 2026 - Man Group plc filed a 13F-HR form disclosing ownership of 501,796 shares of CarMax, Inc. (US:KMX) valued at $20,864,678 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 67,235 shares of CarMax, Inc.. This represents a change in shares of 646.33% during the quarter. The current value of the position is $23,544,268 USD.

Man Group plc 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 0 of underlying shares valued at $0 USD and put options representing 0 of underlying shares valued at $0 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.

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)
2026-05-15 2026-03-31 13F CARMAX COM 143130102 501,796 434,561 646.33 20,865 703.39 0.0233
2026-02-17 2025-12-31 13F CARMAX COM 143130102 67,235 67,235 2,598 0.0044
2025-11-14 2025-09-30 13F CARMAX COM 143130102 0 -724,196 -100.00 0 -100.00
2025-08-14 2025-06-30 13F CARMAX COM 143130102 724,196 -243,269 -25.14 48,673 -35.43 0.0927
2025-05-15 2025-03-31 13F CARMAX COM 143130102 967,465 324,706 50.52 75,385 43.45 0.1911
2025-02-14 2024-12-31 13F CARMAX COM 143130102 642,759 -157,374 -19.67 52,552 -15.12 0.1383
2024-11-14 2024-09-30 13F CARMAX COM 143130102 800,133 209,568 35.49 61,914 42.95 0.1612
2024-08-14 2024-06-30 13F CARMAX COM 143130102 590,565 236,032 66.58 43,312 40.25 0.1094
2024-05-15 2024-03-31 13F CARMAX COM 143130102 354,533 30,883 341.69 0.0779
2023-05-15 2023-03-31 13F CARMAX COM 143130102 6,992 2,900.86 0.0249
2023-02-14 2022-12-31 13F CARMAX COM 143130102 3,832 233 -97.42 0.0008
2022-08-15 2022-06-30 13F CARMAX COM 143130102 9,039 56.38 0.0383
2022-05-16 2022-03-31 13F CARMAX COM 143130102 59,904 -32,087 -34.88 5,780 -51.75 0.0201
2022-02-14 2021-12-31 13F CARMAX COM 143130102 91,991 35,244 62.11 11,980 64.99 0.0385
2021-11-15 2021-09-30 13F CARMAX COM 143130102 56,747 -53,199 -48.39 7,261 -48.87 0.0255
2021-08-16 2021-06-30 13F CARMAX COM 143130102 109,946 85,843 356.15 14,200 344.17 0.0500
2021-05-17 2021-03-31 13F CARMAX COM 143130102 24,103 11,302 88.29 3,197 164.43 0.0141
2021-02-16 2020-12-31 13F CARMAX COM 143130102 12,801 -6,837 -34.82 1,209 -33.02 0.0053
2020-11-16 2020-09-30 13F CARMAX COM 143130102 19,638 -2,933 -12.99 1,805 -10.69 0.0071
2020-08-14 2020-06-30 13F CARMAX COM 143130102 22,571 8,630 61.90 2,021 169.47 0.0102
2020-05-15 2020-03-31 13F CARMAX COM 143130102 13,941 -95,750 -87.29 750 -92.20 0.0049
2020-02-18 2019-12-31 13F CARMAX COM 143130102 109,691 -8,751 -7.39 9,617 -7.73 0.0316
2019-11-14 2019-09-30 13F CARMAX COM 143130102 118,442 -10,878 -8.41 10,423 -7.18 0.0387
2019-08-14 2019-06-30 13F CARMAX COM 143130102 129,320 46,762 56.64 11,229 94.85 0.0406
2019-05-15 2019-03-31 13F CARMAX COM 143130102 82,558 -100,744 -54.96 5,763 -49.88 0.0219
2019-02-14 2018-12-31 13F CARMAX COM 143130102 183,302 171,373 1,436.61 11,499 1,190.57 0.0512
2018-11-14 2018-09-30 13F CARMAX COM 143130102 11,929 1,879 18.70 891 21.72 0.0033
2018-08-14 2018-06-30 13F CARMAX COM 143130102 10,050 1,964 24.29 732 46.11 0.0030
2018-05-15 2018-03-31 13F CARMAX COM 143130102 8,086 8,086 501 0.0023
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
(%)
2021-11-15 2021-09-30 13F CARMAX COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2021-08-16 2021-06-30 13F CARMAX COM Call 100 13 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
(%)
2025-02-14 2024-12-31 13F CARMAX COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2024-11-14 2024-09-30 13F CARMAX COM Put 30,000 2,321 n/a n/a n/a
2021-11-15 2021-09-30 13F CARMAX COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2021-08-16 2021-06-30 13F CARMAX COM Put 100 13 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.