Martin Marietta Materials
MLM · NYSE
$507.58+$5.93 (+1.18%)TodayMarket closed ·
Prev close $501.65
Who owns MLM
Largest institutional holders, from their latest 13F filings
The 10 largest institutions hold 56.6% of MLM’s shares.
- LNA Holding SRL18.2%
- Vanguard Capital Management, LLC6.5%
- Vanguard Portfolio Management, LLC5.3%
- BlackRock Institutional Trust Company, N.A.5.3%
- Next 6 largest institutions21.2%
- All other shareholders43.4%
| Holder | Shares | % of shares |
|---|---|---|
| LNA Holding SRL | 10.95M | 18.24% |
| Vanguard Capital Management, LLC | 3.93M | 6.54% |
| Vanguard Portfolio Management, LLC | 3.20M | 5.32% |
| BlackRock Institutional Trust Company, N.A. | 3.17M | 5.28% |
| State Street Investment Management (US) | 3.16M | 5.26% |
| Principal Global Investors (Equity) | 2.12M | 3.52% |
| Managed Account Advisors LLC | 1.97M | 3.28% |
| Fidelity Management & Research Company LLC | 1.87M | 3.12% |
| Aristotle Capital Management, LLC | 1.83M | 3.05% |
| Victory Capital Management Inc. | 1.78M | 2.97% |
Largest mutual fund holders
| Holder | Shares | % of shares |
|---|---|---|
| Vanguard Total Stock Market Index Fund | 1.92M | 3.19% |
| Vanguard 500 Index Fund | 1.58M | 2.63% |
| Principal MidCap Fund | 1.57M | 2.61% |
| Vanguard Mid-Cap Index Fund | 1.30M | 2.17% |
| iShares Core S&P 500 ETF | 800.92K | 1.33% |
Insider trades
Form 4 filings by officers, directors and large holders
Insiders made no open-market buys or sales of MLM in the last 6 months.
| Insider | Type | Shares | Value |
|---|---|---|---|
| Petro Michael J | Award | 9.33K | — |
| Pike Thomas | Award | 66 | $34.23K |
| WAJSGRAS DAVID C | Award | 78 | $40.46K |
| LYONS MARTIN J | Award | 68 | $35.27K |
| Niemann Philipp | Award | 337 | — |
| Petro Michael J | Tax withholding | 368 | $199.56K |
| Pike Thomas | Award | 59 | $34.32K |
| WAJSGRAS DAVID C | Award | 69 | $40.13K |
| LYONS MARTIN J | Award | 61 | $35.48K |
| Foxx Anthony R | Award | 313 | — |
Congressional trades
Disclosed by members of Congress over the last 12 months
| Member | Type | Amount | Traded |
|---|---|---|---|
| April DelaneyHouse | Sale | $250K–$500K | Aug 25, 2026 |
| April DelaneyHouse | Purchase | $1K–$15K | Aug 19, 2026 |
| Josh GottheimerHouse | Sale | $15K–$50K | Apr 9, 2026 |
| April McClainHouse | Purchase | $1K–$15K | Dec 2, 2025 |
| Ro KhannaHouse | Purchase | $1K–$15K | Nov 3, 2025 |
| Ro KhannaHouse | Sale | $1K–$15K | Oct 28, 2025 |
| Michael McCaulHouse | Sale | $1K–$15K | Oct 27, 2025 |
Short interest
Settled Sep 30, 2026
- Shares short
- 3.19M
- Days to cover
- 3.30
- % of shares outstanding
- 5.31%
- Average daily volume
- 966.16K
- Change since last report
- +9.7%
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