Who owns MTZ? 13F holders and whale ownership
MTZ is tracked across public portfolios in Whale Analyzer. This page answers who owns MTZ, which top funds are buying MTZ, aggregate disclosed value, and recent position changes based on public data. Stephen Mandel is the largest reported holder at $493M; the top five funds control 100.0% of reported ownership; institutions were net selling last quarter (1 increased, 2 reduced); the stock trades above the aggregate whale cost basis of $344.82. Top tracked holders include Stephen Mandel, Philippe Laffont, and Dan Loeb.
Continue to the live MTZ dashboardTop holders
| Investor | Reported value | Shares | Change |
|---|---|---|---|
| Stephen Mandel 13F portfolio Lone Pine Capital holdings | $492.6M | 1.5M | New |
| Philippe Laffont 13F portfolio Coatue Management holdings | $187.8M | 583.6K | Reduced |
| Dan Loeb 13F portfolio Third Point holdings | $103.0M | 320.0K | Reduced |
Ownership concentration
Reported ownership of MTZ is highly concentrated across tracked institutions.
- Single largest holder: 62.9% of reported ownership
- Top 5 holders: 100.0%
- Top 10 holders: 100.0%
Whale activity this quarter
Across 3 tracked institutions, 2 reduced, 1 increased. Net positioning is net selling.
- Stephen Mandel — Lone Pine Capital ($492.6M) · avg cost $394.05
- Philippe Laffont — Coatue Management ($187.8M) (▼ 13.9% qoq shares) · avg cost $215.66
- Dan Loeb — Third Point ($103.0M) (▼ 65.4% qoq shares)
Whale cost basis vs current price
The aggregate tracked cost basis is $344.82 versus a current price of $396.25, so MTZ trades above its cost basis (+14.9%). Average unrealized P&L across tracked holders: 38%.
Sector positioning — Industrials
MTZ sits within the Industrials sector alongside 85 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 MTZ dashboard for price charts and cross-investor scans, or read the SEC 13F guide.
Related stock holder pages
- VST whale holders — VISTRA CORP
- ASML whale holders — ASML HLDG NV
- CRS whale holders — CARPENTER TECHNOLOGY CORP
- LPLA whale holders — LPL FINL HLDGS INC
- APP whale holders — APPLOVIN CORP
- TLN whale holders — TALEN ENERGY CORP
- TER whale holders — TERADYNE INC
- CVNA whale holders — CARVANA CO
Learn more in Whale Analyzer Academy
Deepen your read on MTZ with these Whale Analyzer Academy guides:
Frequently asked questions
Who owns MTZ stock?
Whale Analyzer tracks 3 public institutional holders of MTZ with a combined reported value of $783.3M. See the holder table above for the largest tracked positions.
Which top funds are buying MTZ?
Tracked institutions were net selling last quarter — 2 reduced, 1 increased. Check the "Change" column: "New" = fresh position, "Increased" = added, "Reduced" = trimmed.
How concentrated is MTZ ownership?
The top five tracked holders report 100.0% of aggregate ownership.
Is MTZ above or below the whale cost basis?
The aggregate tracked cost basis is $344.82 versus a current price of $396.25 (+14.9%).
What does 13F ownership mean for MTZ?
Use the interactive MTZ dashboard on Whale Analyzer for real-time holder analysis, or read our 13F Alpha Signals Guide.