Who owns BLDR? 13F holders and whale ownership
BLDR is tracked across public portfolios in Whale Analyzer. This page answers who owns BLDR, which top funds are buying BLDR, aggregate disclosed value, and recent position changes based on public data. Robert Robotti is the largest reported holder at $43M; the top five funds control 100.0% of reported ownership; institutions were net buying last quarter (3 increased, 1 reduced); the stock trades above the aggregate whale cost basis of $81.06. Top tracked holders include Robert Robotti, Chris Bloomstran, Turtle Creek Asset Management, and Bill Miller.
Continue to the live BLDR dashboardTop holders
| Investor | Reported value | Shares | Change |
|---|---|---|---|
| Robert Robotti 13F portfolio Robotti & Co holdings | $43.1M | 523.6K | Increased |
| Chris Bloomstran 13F portfolio Semper Augustus Investments holdings | $18.8M | 228.2K | New |
| Turtle Creek Asset Management 13F portfolio Turtle Creek Asset Management holdings | $7.8M | 95.0K | Reduced |
| Bill Miller 13F portfolio Miller Value Partners holdings | $1.6M | 18.9K | New |
Ownership concentration
Reported ownership of BLDR is highly concentrated across tracked institutions.
- Single largest holder: 60.5% of reported ownership
- Top 5 holders: 100.0%
- Top 10 holders: 100.0%
Whale activity this quarter
Across 4 tracked institutions, 3 increased, 1 reduced. Net positioning is net buying.
- Robert Robotti — Robotti & Co ($43.1M) (▲ 22.6% qoq shares)
- Chris Bloomstran — Semper Augustus Investments ($18.8M) · avg cost $82.33
- Turtle Creek Asset Management — Turtle Creek Asset Management ($7.8M) (▲ 40.4% qoq shares) · avg cost $78.01
Whale cost basis vs current price
The aggregate tracked cost basis is $81.06 versus a current price of $89.14, so BLDR trades above its cost basis (+10.0%). Average unrealized P&L across tracked holders: -14%.
Sector positioning — Other
BLDR 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 BLDR dashboard for price charts and cross-investor scans, or read the SEC 13F guide.
Related stock holder pages
- TDGMW whale holders — TIDEWATER INC
- FPH whale holders — FIVE POINT HOLDINGS LLC
- LXU whale holders — LSB INDS INC
- WFG whale holders — WEST FRASER TIMBER CO LTD
- WLK whale holders — WESTLAKE CHEM CORP
- CNQ whale holders — CANADIAN NAT RES LTD
- CVCO whale holders — CAVCO INDS INC DEL
- AXR whale holders — AMREP CORP NEW
Learn more in Whale Analyzer Academy
Deepen your read on BLDR with these Whale Analyzer Academy guides:
Frequently asked questions
Who owns BLDR stock?
Whale Analyzer tracks 4 public institutional holders of BLDR with a combined reported value of $71.3M. See the holder table above for the largest tracked positions.
Which top funds are buying BLDR?
Tracked institutions were net buying last quarter — 3 increased, 1 reduced. Check the "Change" column: "New" = fresh position, "Increased" = added, "Reduced" = trimmed.
How concentrated is BLDR ownership?
The top five tracked holders report 100.0% of aggregate ownership.
Is BLDR above or below the whale cost basis?
The aggregate tracked cost basis is $81.06 versus a current price of $89.14 (+10.0%).
What does 13F ownership mean for BLDR?
Use the interactive BLDR dashboard on Whale Analyzer for real-time holder analysis, or read our 13F Alpha Signals Guide.