Who owns DJCO? 13F holders and whale ownership
DJCO is tracked across public portfolios in Whale Analyzer. This page answers who owns DJCO, which top funds are buying DJCO, aggregate disclosed value, and recent position changes based on public data. Guy Spier is the largest reported holder at $6M; the top five funds control 100.0% of reported ownership; the stock trades above the aggregate whale cost basis of $275.0. Top tracked holders include Guy Spier.
Continue to the live DJCO dashboardTop holders
| Investor | Reported value | Shares | Change |
|---|---|---|---|
| Guy Spier 13F portfolio Aquamarine Fund holdings | $5.5M | 11.5K | Held |
Ownership concentration
Reported ownership of DJCO 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 held. Net positioning is stable.
- Guy Spier — Aquamarine Fund ($5.5M) (→ 0.0% qoq shares) · avg cost $275.00
Whale cost basis vs current price
The aggregate tracked cost basis is $275.00 versus a current price of $574.44, so DJCO trades above its cost basis (+108.9%). Average unrealized P&L across tracked holders: 69%.
Sector positioning — Other
DJCO 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 DJCO dashboard for price charts and cross-investor scans, or read the SEC 13F guide.
Related stock holder pages
- BRK.B whale holders — BERKSHIRE HATHAWAY INC DEL
- BRK-A whale holders — BERKSHIRE HATHAWAY INC DEL
- MA whale holders — MASTERCARD INCORPORATED
- AXP whale holders — AMERICAN EXPRESS CO
- MCO whale holders — MOODYS CORP
- RACE whale holders — FERRARI N V
Learn more in Whale Analyzer Academy
Deepen your read on DJCO with these Whale Analyzer Academy guides:
Frequently asked questions
Who owns DJCO stock?
Whale Analyzer tracks 1 public institutional holders of DJCO with a combined reported value of $5.5M. See the holder table above for the largest tracked positions.
Which top funds are buying DJCO?
Tracked institutions were stable last quarter — 1 held. Check the "Change" column: "New" = fresh position, "Increased" = added, "Reduced" = trimmed.
How concentrated is DJCO ownership?
The top five tracked holders report 100.0% of aggregate ownership.
Is DJCO above or below the whale cost basis?
The aggregate tracked cost basis is $275.00 versus a current price of $574.44 (+108.9%).
What does 13F ownership mean for DJCO?
Use the interactive DJCO dashboard on Whale Analyzer for real-time holder analysis, or read our 13F Alpha Signals Guide.