Who owns M? 13F holders and whale ownership
M is tracked across public portfolios in Whale Analyzer. This page answers who owns M, which top funds are buying M, aggregate disclosed value, and recent position changes based on public data. Warren Buffett is the largest reported holder at $55M; 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 $18.09. Top tracked holders include Warren Buffett.
Continue to the live M dashboardTop holders
| Investor | Reported value | Shares | Change |
|---|---|---|---|
| Warren Buffett 13F portfolio Berkshire Hathaway holdings | $55.0M | 3.0M | New |
Ownership concentration
Reported ownership of M 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.
- Warren Buffett — Berkshire Hathaway ($55.0M) · avg cost $18.09
Whale cost basis vs current price
The aggregate tracked cost basis is $18.09 versus a current price of $25.96, so M trades above its cost basis (+43.5%). Average unrealized P&L across tracked holders: 11%.
Sector positioning — Other
M 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 M dashboard for price charts and cross-investor scans, or read the SEC 13F guide.
Related stock holder pages
- AAPL whale holders — APPLE INC
- AXP whale holders — AMERICAN EXPRESS CO
- KO whale holders — COCA COLA CO
- BAC whale holders — BANK AMERICA CORP
- CVX whale holders — CHEVRON CORPORATION
- OXY whale holders — OCCIDENTAL PETE CORP
- GOOGL whale holders — ALPHABET INC
- CB whale holders — CHUBB LTD SWITZ
Learn more in Whale Analyzer Academy
Deepen your read on M with these Whale Analyzer Academy guides:
Frequently asked questions
Who owns M stock?
Whale Analyzer tracks 1 public institutional holders of M with a combined reported value of $55.0M. See the holder table above for the largest tracked positions.
Which top funds are buying M?
Tracked institutions were net buying last quarter — 1 increased. Check the "Change" column: "New" = fresh position, "Increased" = added, "Reduced" = trimmed.
How concentrated is M ownership?
The top five tracked holders report 100.0% of aggregate ownership.
Is M above or below the whale cost basis?
The aggregate tracked cost basis is $18.09 versus a current price of $25.96 (+43.5%).
What does 13F ownership mean for M?
Use the interactive M dashboard on Whale Analyzer for real-time holder analysis, or read our 13F Alpha Signals Guide.