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Ken Griffin's CarMax, Inc. (KMX) position

Yes: as of Q1 2026, Ken Griffin holds 485K shares of KMX worth $20M (0.0% of the disclosed portfolio). Held since at least Q1 2021; that opening coverage snapshot is not counted as a purchase.
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Current value
$20M
Shares held
485K
% of portfolio
0.0%
Est. average buy price
$39.99
est. since Q4 2025
Quarter-end price
$41.60

Estimated trade prices

Average price in quarters with purchases
$77.82
Average prices in quarters with sales
  • Q1 2026: $43.78 (13K shares sold)
  • Q3 2025: $59.70 (812K shares sold)
  • Q4 2024: $78.54 (310K shares sold)
  • Q1 2024: $75.64 (118K shares sold)
  • Q4 2023: $67.22 (1.3M shares sold)
  • Q4 2022: $64.20 (222K shares sold)
  • Q2 2022: $94.04 (175K shares sold)
  • Q2 2021: $123.63 (628K shares sold)

KMX price vs Griffin's position

1Y 3Y 5Y MAX
Dates
Sold 812K shares (67.5%) · Q3 2025. Average closing price $59.70 · Price range $44.86–$71.57812KsharessoldSold 13K shares (2.7%) · Q1 2026. Average closing price $43.78 · Price range $39.29–$48.8313Ksharessold← Earlier —9 purchases, 6 sells204060802026
Average closing price · filing quarter
$43.78
Price range · filing quarter
$39.29 – $48.83
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Every quarterly change

Every quarterly change
Quarter Action Shares change Est. value change Δ Own Shares held Filing date
Reduced· Q1 2026 −$582K
Quarter Q1 2026 Shares change −13K Δ Own −2.7% Shares held 485K Filing date May 15, 2026
Q1 2026 Reduced· Q1 2026 −13K −$582K −2.7% 485K May 15, 2026
First covered· Q4 2025
Quarter Q4 2025 Shares held 498K Filing date Feb 17, 2026
Q4 2025 First covered· Q4 2025 – – – 498K Feb 17, 2026
Reduced· Q3 2025 −$48M
Quarter Q3 2025 Shares change −812K Δ Own −67.5% Shares held 392K Filing date Nov 14, 2025
Q3 2025 Reduced· Q3 2025 −812K −$48M −67.5% 392K Nov 14, 2025
Added· Q2 2025 +$39M
Quarter Q2 2025 Shares change +584K Δ Own +94.4% Shares held 1.2M Filing date Aug 14, 2025
Q2 2025 Added· Q2 2025 +584K +$39M +94.4% 1.2M Aug 14, 2025
Added· Q1 2025 +$5.9M
Quarter Q1 2025 Shares change +74K Δ Own +13.5% Shares held 619K Filing date May 15, 2025
Q1 2025 Added· Q1 2025 +74K +$5.9M +13.5% 619K May 15, 2025
Reduced· Q4 2024 −$24M
Quarter Q4 2024 Shares change −310K Δ Own −36.2% Shares held 545K Filing date Feb 14, 2025
Q4 2024 Reduced· Q4 2024 −310K −$24M −36.2% 545K Feb 14, 2025
Added· Q3 2024 +$6.6M
Quarter Q3 2024 Shares change +83K Δ Own +10.7% Shares held 855K Filing date Nov 14, 2024
Q3 2024 Added· Q3 2024 +83K +$6.6M +10.7% 855K Nov 14, 2024
Added· Q2 2024 +$42M
Quarter Q2 2024 Shares change +582K Δ Own +305.9% Shares held 772K Filing date Aug 14, 2024
Q2 2024 Added· Q2 2024 +582K +$42M +305.9% 772K Aug 14, 2024
Reduced· Q1 2024 −$8.9M
Quarter Q1 2024 Shares change −118K Δ Own −38.3% Shares held 190K Filing date May 15, 2024
Q1 2024 Reduced· Q1 2024 −118K −$8.9M −38.3% 190K May 15, 2024
Reduced· Q4 2023 −$87M
Quarter Q4 2023 Shares change −1.3M Δ Own −80.8% Shares held 308K Filing date Feb 14, 2024
Q4 2023 Reduced· Q4 2023 −1.3M −$87M −80.8% 308K Feb 14, 2024
Added· Q3 2023 +$71M
Quarter Q3 2023 Shares change +863K Δ Own +116.1% Shares held 1.6M Filing date Nov 14, 2023
Q3 2023 Added· Q3 2023 +863K +$71M +116.1% 1.6M Nov 14, 2023
Added· Q2 2023 +$9.1M
Quarter Q2 2023 Shares change +124K Δ Own +20.1% Shares held 743K Filing date Aug 14, 2023
Q2 2023 Added· Q2 2023 +124K +$9.1M +20.1% 743K Aug 14, 2023
Added· Q1 2023 +$27M
Quarter Q1 2023 Shares change +399K Δ Own +182.0% Shares held 619K Filing date May 15, 2023
Q1 2023 Added· Q1 2023 +399K +$27M +182.0% 619K May 15, 2023
Reduced· Q4 2022 −$14M
Quarter Q4 2022 Shares change −222K Δ Own −50.3% Shares held 219K Filing date Feb 14, 2023
Q4 2022 Reduced· Q4 2022 −222K −$14M −50.3% 219K Feb 14, 2023
First covered· Q3 2022
Quarter Q3 2022 Shares held 442K Filing date Nov 14, 2022
Q3 2022 First covered· Q3 2022 – – – 442K Nov 14, 2022
Data through Q1 2026 · filed May 15, 2026
15 of 20

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Common questions

Does Ken Griffin own KMX?

Yes. As of Q1 2026, Ken Griffin disclosed 485K shares of KMX, worth $20M. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

When did Ken Griffin buy KMX?

Ken Griffin held KMX since at least Q1 2021, when this filing coverage begins; the opening snapshot is not a disclosed purchase. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

Did Ken Griffin sell KMX?

The quarter-by-quarter table above shows each sale and reduction Ken Griffin disclosed in KMX. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

How many shares of KMX does Ken Griffin own?

Ken Griffin disclosed 485K shares of KMX as of Q1 2026. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

What price did Ken Griffin pay for KMX?

Ken Griffin began building the KMX position before our 13F history starts, so an exact average buy price cannot be estimated without understating it. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

How are the estimated trade prices calculated?

13F filings disclose quarter-end holdings, not trade dates or execution prices. These estimates use each covered quarter's average market price; the add average excludes the opening position and quarters without price data. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.