Who owns KMX? 13F holders and whale ownership
KMX is tracked across public portfolios in Whale Analyzer. This page answers who owns KMX, which top funds are buying KMX, aggregate disclosed value, and recent position changes based on public data. Jeff Smith is the largest reported holder at $258M; the top five funds control 100.0% of reported ownership; institutions were net buying last quarter (1 increased, 0 reduced); the stock trades above the aggregate whale cost basis of $41.58. Top tracked holders include Jeff Smith.
Continue to the live KMX dashboardTop holders
| Investor | Reported value | Shares | Change |
|---|---|---|---|
| Jeff Smith 13F portfolio Starboard Value LP holdings | $257.9M | 6.2M | New |
Ownership concentration
Reported ownership of KMX is highly concentrated across tracked institutions.
- Single largest holder: 100.0% of reported ownership
- Top 5 holders: 100.0%
- Top 10 holders: 100.0%
Whale activity this quarter
Across 1 tracked institutions, 1 increased. Net positioning is net buying.
- Jeff Smith — Starboard Value LP ($257.9M) · avg cost $41.58
Whale cost basis vs current price
The aggregate tracked cost basis is $41.58 versus a current price of $52.76, so KMX trades above its cost basis (+26.9%). Average unrealized P&L across tracked holders: -10%.
Sector positioning — Other
KMX sits within the Other sector alongside 670 other tracked names. Compare whale ownership across peers:
How to use this page
Values are reported public positions from tracked 13F filers and disclosures — not real-time ownership totals. Open the live KMX dashboard for price charts and cross-investor scans, or read the SEC 13F guide.
Related stock holder pages
- QRVO whale holders — QORVO INC
- KVUE whale holders — KENVUE INC
- IJH whale holders — ISHARES TR
- AQNB whale holders — ALGONQUIN PWR UTILS CORP
- MTCH whale holders — MATCH GROUP INC NEW
- ACTG whale holders — ACACIA RESH CORP
- BILL whale holders — BILL HOLDINGS INC
- LW whale holders — LAMB WESTON HLDGS INC
Learn more in Whale Analyzer Academy
Deepen your read on KMX with these Whale Analyzer Academy guides:
Frequently asked questions
Who owns KMX stock?
Whale Analyzer tracks 1 public institutional holders of KMX with a combined reported value of $257.9M. See the holder table above for the largest tracked positions.
Which top funds are buying KMX?
Tracked institutions were net buying last quarter — 1 increased. Check the "Change" column: "New" = fresh position, "Increased" = added, "Reduced" = trimmed.
How concentrated is KMX ownership?
The top five tracked holders report 100.0% of aggregate ownership.
Is KMX above or below the whale cost basis?
The aggregate tracked cost basis is $41.58 versus a current price of $52.76 (+26.9%).
What does 13F ownership mean for KMX?
Use the interactive KMX dashboard on Whale Analyzer for real-time holder analysis, or read our 13F Alpha Signals Guide.