Martin Marietta Materials Ownership | Who Owns Martin Marietta Materials?
Martin Marietta Materials Ownership Summary
Martin Marietta Materials is owned by 99.05% institutional investors, 0.84% insiders, and 0.11% retail investors. Vanguard group is the largest institutional shareholder, holding 12.23% of MLM shares. Vanguard MStar Total Stk Mkt Idx Invest is the top mutual fund, with 3.19% of its assets in Martin Marietta Materials shares.
MLM Ownership Benchmark
| Type | Name | % Inst | % Insiders | % Retail |
|---|---|---|---|---|
| Stock | Martin Marietta Materials | 99.05% | 0.84% | 0.11% |
| Sector | Basic Materials Stocks | 58.82% | 12.62% | 28.56% |
Institutional Shareholders
Top Institutional Shareholders by Total Shares
| Holder | Shares | % Holding | Value |
|---|---|---|---|
| Vanguard group | 7.37M | 12.23% | $4.59B |
| Blackrock funding, inc. /de | 4.69M | 7.78% | $2.71B |
| Blackrock | 4.14M | 6.70% | $2.24B |
| Vanguard capital management | 3.93M | 6.52% | $2.27B |
| State street | 3.16M | 5.24% | $1.82B |
| Bank of america corp /de/ | 2.45M | 4.06% | $1.41B |
| Fmr | 2.19M | 3.64% | $1.26B |
| Principal financial group | 2.12M | 3.51% | $1.22B |
| Aristotle capital management | 1.83M | 3.04% | $1.06B |
| Victory capital management | 1.78M | 2.96% | $1.03B |
Top Institutional Shareholders by % of Total Assets
| Holder | Shares | % Assets | Value |
|---|---|---|---|
| Steginsky capital | 138.55K | 11.99% | $79.90M |
| Camrose capital investment partners llp | 146.17K | 9.52% | $84.30M |
| Rdst capital | 163.55K | 7.81% | $94.32M |
| Nitorum capital | 19.03K | 7.47% | $10.97M |
| Quantum capital management, llc / nj | 93.72K | 6.78% | $54.05M |
| Bluegrass capital partners lp | 17.00K | 6.37% | $9.80M |
| Mcdonald capital investors inc/ca | 138.98K | 5.85% | $80.15M |
| Bornite capital management lp | 65.20K | 4.73% | $37.60M |
| Gardner russo & quinn | 705.37K | 4.56% | $406.78M |
| Hawk ridge capital management lp | 238.66K | 4.41% | $137.63M |
Top Buyers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Tci fund management | 1.32M | 1.44% | 1.32M |
| Norges bank | 557.14K | 0.03% | 557.14K |
| Sixth street partners management company | 492.54K | 0.04% | 492.54K |
| State street | 3.16M | 0.05% | 282.07K |
| Goldman sachs group | 1.16M | 0.06% | 277.48K |
Top Sellers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Fmr | 2.19M | 0.05% | -415.38K |
| Jpmorgan chase | 1.47M | 0.05% | -393.34K |
| Morgan stanley | 1.01M | 0.03% | -329.58K |
| T. rowe price investment management | 641.32K | 0.24% | -311.08K |
| Gqg partners | - | - | -196.19K |
New Positions
| Holder | Shares | % Assets | Change | Value |
|---|---|---|---|---|
| Tci fund management | 1.32M | 1.44% | 1.32M | $758.42M |
| Norges bank | 557.14K | 0.03% | 557.14K | $321.30M |
| Sixth street partners management company | 492.54K | 0.04% | 492.54K | $284.05M |
| 59 north capital management, lp | 214.15K | 2.75% | 214.15K | $123.50M |
| Junto capital management lp | 123.55K | 1.25% | 123.55K | $71.25M |
Sold Out
| Holder | Change |
|---|---|
| Atlantic private wealth | -1.00 |
| Loring wolcott & coolidge fiduciary advisors llp/ma | -1.00 |
| Rakuten securities | -1.00 |
| Baldwin brothers llc/ma | -1.00 |
| Innealta capital | -1.00 |
Institutional Ownership Trends
| Date | Holdings | Change % | Shares | Change % | Ownership | Change % | Increased Position | Change % | Decreased Position | Change % |
|---|---|---|---|---|---|---|---|---|---|---|
| Jun 30, 2026 | 1,077 | -1.10% | 59,728,526 | 2.29% | 99 | 1.06% | 466 | -1.69% | 391 | 4.55% |
| Mar 31, 2026 | 1,074 | -4.62% | 58,246,463 | -2.12% | 96 | 0.99% | 472 | -7.45% | 365 | 2.82% |
| Dec 31, 2025 | 501 | -52.78% | 15,612,935 | -73.18% | 25 | 0.28% | 214 | -56.85% | 166 | -51.60% |
| Sep 30, 2025 | 589 | -41.74% | 21,293,061 | -64.29% | 35 | 0.36% | 293 | -42.32% | 162 | -49.06% |
| Jun 30, 2025 | 996 | 3.43% | 59,602,150 | 1.08% | 98 | 1.05% | 503 | 7.25% | 311 | -1.58% |
Top Mutual Funds Shareholders
| Holder | Shares | % Holding | Change |
|---|---|---|---|
| Vanguard MStar Total Stk Mkt Idx Invest | 1.92M | 3.19% | 5.33K |
| Vanguard Total Stock Mkt Idx Inv | 1.91M | 3.19% | -5.56K |
| Vanguard Morn Total Stk Mkt Idx Investor | 1.91M | 3.19% | -5.56K |
| Vanguard US Total Market Shares ETF | 1.93M | 3.17% | -20.89K |
| Vanguard Institutional 500 Index Trust | 1.74M | 2.88% | 12.14K |
| Vanguard 500 Index Investor | 1.58M | 2.62% | 16.54K |
| Principal MidCap R5 | 1.57M | 2.61% | 67.15K |
| Principal Aligned MidCap Equity | 1.51M | 2.51% | -3.66K |
| Vanguard Mid Cap Index Institutional | 1.31M | 2.17% | -2.65K |
| Vanguard Morn Mid Cap Index Instl | 1.31M | 2.17% | -2.65K |
Recent Insider Transactions
| Date | Name | Role | Activity | Value |
|---|---|---|---|---|
| Aug 08, 2025 | PEREZ LAREE E | - | Sell | $636.63K |
| Mar 05, 2025 | McCunniff Donald A. | EVP and CHRO | Sell | $632.70K |
| Mar 04, 2025 | Petro Michael J | SVP - Strategy and Development | Buy | $249.90K |
| Mar 14, 2024 | BAR ROSELYN R | EVP, General Counsel and Secy | Sell | $6.03M |
| Mar 05, 2024 | Nye C Howard | Chairman, Pres & CEO | Sell | $3.02M |
Insider Transactions Trends
| Date | Buy | Sell |
|---|---|---|
| 2026 Q3 | - | - |
| 2026 Q2 | - | - |
| 2026 Q1 | - | - |
| 2025 Q4 | - | - |
| 2025 Q3 | - | 1 |
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