Ranked by reported Q1 2026 13F market value
Share of total reported institutional value in KMX held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | 17.3M | $717.6M | -3.3% | 12.063% | 0.01% |
| 2 | AQR CAPITAL MANAGEMENT LLC | 10.1M | $412.6M | +26.9% | 7.032% | 0.19% |
| 3 | VANGUARD PORTFOLIO MANAGEMENT LLC | 7.3M | $302.5M | β | 5.086% | 0.02% |
| 4 | VANGUARD CAPITAL MANAGEMENT LLC | 6.4M | $265.6M | β | 4.464% | 0.01% |
| 5 | Starboard Value LP | 6.2M | $257.9M | β | 4.335% | 5.64% |
| 6 | SRS Investment Management, LLC | 5.7M | $235.0M | +0.3% | 3.950% | 2.48% |
| 7 | TWO SIGMA INVESTMENTS, LP | 5.4M | $222.8M | +79.8% | 3.745% | 0.18% |
| 8 | STATE STREET CORP | 4.9M | $203.1M | -3.3% | 3.415% | 0.01% |
| 9 | JANUS HENDERSON GROUP PLC | 4.6M | $190.5M | +1.1% | 3.202% | 0.09% |
| 10 | PRIMECAP MANAGEMENT CO/CA/ | 4.4M | $181.2M | -0.2% | 3.046% | 0.14% |
| 11 | DIMENSIONAL FUND ADVISORS LP | 4.3M | $177.8M | +7.3% | 2.989% | 0.04% |
| 12 | Apollo Management Holdings, L.P. | 4.1M | $172.3M | -17.9% | 2.897% | 2.80% |
| 13 | Baird Financial Group, Inc. | 3.1M | $127.6M | +15.3% | 2.145% | 0.20% |
| 14 | First Pacific Advisors, LP | 3.0M | $124.0M | +2.0% | 2.084% | 1.74% |
| 15 | GEODE CAPITAL MANAGEMENT, LLC | 2.6M | $106.3M | -0.1% | 1.786% | 0.01% |
| 16 | MORGAN STANLEY | 2.5M | $105.4M | +10.2% | 1.772% | 0.01% |
| 17 | DIAMOND HILL CAPITAL MANAGEMENT INC | 2.5M | $102.7M | -41.3% | 1.727% | 0.64% |
| 18 | MANUFACTURERS LIFE INSURANCE COMPANY, THE | 2.4M | $99.7M | -1.0% | 1.676% | 0.09% |
| 19 | UBS Group AG | 2.4M | $98.1M | +38.4% | 1.649% | 0.01% |
| 20 | Vulcan Value Partners, LLC | 2.2M | $91.7M | -24.7% | 1.541% | 2.43% |
| 21 | BANK OF AMERICA CORP /DE/ | 1.7M | $70.2M | +61.7% | 1.179% | 0.01% |
| 22 | GOLDMAN SACHS GROUP INC | 1.6M | $66.6M | +239.8% | 1.119% | 0.01% |
| 23 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | 1.6M | $65.6M | -19.2% | 1.102% | 0.01% |
| 24 | Focus Partners Wealth | 1.5M | $62.1M | +94.8% | 1.043% | 0.07% |
| 25 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 1.4M | $59.7M | +6.5% | 1.003% | 0.01% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). β% of Fundβ shows how much of that investorβs total 13F portfolio is invested in KMX β a direct measure of their conviction.
Filings activity in KMX during Q1 2026, grouped by how each filer changed its position.
Institutions that opened a new KMX position in Q1 2026
Institutions that fully closed their KMX position in Q1 2026
8 quarters of 13F filings Β· Ξ columns show change vs prior quarter
| Quarter | Inst. Holders | Ξ Holders | Ownership % | Ξ Ownership | Total 13F Value | Ξ Value |
|---|---|---|---|---|---|---|
| Q1 2026 | 532 | +1.7% | 84.53% | +7.03 pp | $6.20B | +9.1% |
| Q4 2025 | 523 | 13% | 77.50% | 10.64 pp | $5.68B | 12% |
| Q3 2025 | 603 | 16% | 88.14% | 53.86 pp | $6.46B | 38% |
| Q2 2025 | 721 | 1.8% | 142.00% | 21.92 pp | $10.41B | 13% |
| Q1 2025 | 734 | +0.8% | 163.92% | 27.50 pp | $12.02B | 14% |
| Q4 2024 | 728 | +1.8% | 191.42% | +27.98 pp | $14.04B | +17% |
| Q3 2024 | 715 | +3.9% | 163.44% | 4.81 pp | $11.99B | 2.9% |
| Q2 2024 | 688 | β | 168.25% | β | $12.34B | β |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Ξ columns compare to the immediately prior filed quarter.
Quick answers to the most common questions about buying KMX stock.
Based on Q1 2026 13F filings, institutional ownership of CarMax, Inc. stands at 84.5%, held across 532 reporting institutions.
BlackRock, Inc. is the largest reported institutional holder of KMX, with approximately 17,257,461 shares worth $0.72B as of Q1 2026.
Yes β 2 widely-followed marquee investors appear among the top 25 institutional holders of KMX, including TWO SIGMA INVESTMENTS, LP, SUSQUEHANNA INTERNATIONAL GROUP, LLP.
Our composite Smart Money Score for KMX is 66 out of 100 (Bullish). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
107 institutions opened new positions in KMX during Q1 2026, while 98 fully exited. 299 added to existing positions and 125 trimmed.
KMX institutional ownership rose by 7.03 percentage points quarter-over-quarter, with a net change of +9 holders.
The top 10 institutions account for 48.2% of all reported 13F value in KMX, and the top 25 account for 72.9%.
All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.
CarMax, Inc. (KMX) Institutional Ownership