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KMX · Carmax Inc · Holdings

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Market Cap
$8.59B
Shares
141.91M

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Holders: 558
Total Value: $8,083,864,088
Total Shares: 152,874,187
Showing 1–100 of 593 holdings by value · page 1 of 6

Institutional Ownership Trend

26 quarters

Holder Concentration

Across 558 13F filers · Δ vs Mar 31, 2026
Top Holder
11.2%
Sep 2023 → Jun 2026 · range 10.1% – 11.3%
+0.3 pts
Top 5
28.4%
Sep 2023 → Jun 2026 · range 28.0% – 32.6%
−1.3 pts
Top 10
44.7%
Sep 2023 → Jun 2026 · range 39.9% – 46.7%
−0.5 pts
HHI
308
Sep 2023 → Jun 2026 · range 270 – 359
Broadly held−4

Quarterly Activity

vs Mar 31, 2026
New
90
Increased
133
Decreased
263
Sold Out
87
Unchanged
72
Holder count: +3
Institutional value: +22.1%
Shares held: -4.0%

Top Buyers

vs Mar 31, 2026
Institution Added Now Holds Open

Top Sellers

vs Mar 31, 2026
Institution Sold Now Holds Open

Top New Positions

vs Mar 31, 2026
Institution Acquired Value (USD) Open

Top Sold-Out Positions

vs Mar 31, 2026
Institution Previously Held Last Value (USD) Open
Showing 100 of 593
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Holder Value (USD) % of 13F Shares Open
Key facts CIK 1170010 CUSIP 143130102 13F (30d) 208 filings 207 filers Visit website Investor relations