Martin Marietta Materials Inc (MLM) shareholders
MLMNYSEMining & Quarrying of Nonmetallic Minerals (No Fuels)Fiscal year ends December 31
Financials through Q3 FY2026, quarter ended Sep 30, 2026Last filing: 10-Q on Nov 4, 2026Score 16/3012% below fair value
$513.61−3.72 (-0.72%)
Close on Nov 13, 2026Market cap $30.85BP/E 13.6Yield 0.63%
Ownership
Institutional holdings as of Jun 30, 2026, from 13F filings
Held by institutions
98.7%
59M of 60M shares
Institutional holders
1,071
110 new, 98 sold out
Net institutional buying
1M
In Q2 2026
Insider trades, 12 months
0 buys · 0 sales
Open-market trades only
Shares held by institutions
Holders of more than 5%
Latest Schedule 13D (active) or 13G (passive) filed by each holder
| Holder | Shares | % of class | Filing | As of |
|---|---|---|---|---|
| Financiere de Gestions Internationales SCA Joint filing with LNA Holding SRL (15.40%), Kalk en Dolomiet Maatschappij SA (15.40%) and 1 more | 10,953,543 | 15.40% | 13D (active) | Aug 21, 2026 |
| Vanguard Capital Management | 4,555,892 | 6.41% | 13G (passive) amendment | Sep 30, 2026 |
| BlackRock, Inc. | 4,113,718 | 6.70% | 13G (passive) amendment | Dec 31, 2023 |
Top institutional holders
13F holdings as of Jun 30, 2026
| Holder | Shares | % of MLM | Value | Change | % of portfolio |
|---|---|---|---|---|---|
| BlackRock, Inc. | 4,692,446 | 7.81% | $2.71B | +6,689 | 0.04% |
| Vanguard Capital Management LLC | 3,929,705 | 6.54% | $2.27B | +12,322 | 0.05% |
| Vanguard Portfolio Management LLC | 3,197,395 | 5.32% | $1.84B | +36,951 | 0.08% |
| State Street Corp | 3,159,639 | 5.26% | $1.82B | +282,071 | 0.05% |
| Bank Of America Corp /De/ | 2,446,762 | 4.07% | $1.41B | +46,983 | 0.09% |
| FMR LLC | 2,192,603 | 3.65% | $1.26B | −415,376 | 0.05% |
| Principal Financial Group Inc | 2,116,369 | 3.52% | $1.22B | +22,427 | 0.60% |
| Aristotle Capital Management, LLC | 1,831,597 | 3.05% | $1.06B | −123,503 | 2.22% |
| Victory Capital Management Inc | 1,783,432 | 2.97% | $1.03B | +146,285 | 0.58% |
| Geode Capital Management, LLC | 1,601,490 | 2.67% | $919.89M | +12,556 | 0.05% |
| Price T Rowe Associates Inc /Md/ | 1,599,324 | 2.66% | $922.33M | +110,484 | 0.09% |
| JPMorgan Chase & Co | 1,466,887 | 2.44% | $852.60M | −393,339 | 0.05% |
| Tci Fund Management Ltd | 1,315,109 | 2.19% | $758.42M | New | 1.44% |
| Goldman Sachs Group Inc | 1,163,330 | 1.94% | $670.89M | +277,475 | 0.06% |
| Morgan Stanley | 1,012,016 | 1.68% | $583.63M | −329,585 | 0.03% |
| Select Equity Group, L.P. | 1,011,255 | 1.68% | $583.19M | −22,165 | 2.88% |
| Baillie Gifford & Co | 991,786 | 1.65% | $571.96M | −95,594 | 0.52% |
| Gardner Russo & Quinn LLC | 705,367 | 1.17% | $406.78M | −10,044 | 4.56% |
| King Luther Capital Management Corp | 653,184 | 1.09% | $376.69M | −13,538 | 1.54% |
| Invesco Ltd. | 649,575 | 1.08% | $374.61M | −41,338 | 0.03% |
Institutional buying and selling by quarter
Positions opened, added to, reduced and closed by 13F filers
| Quarter | Holders | Shares held | % of shares | New / added | Reduced / closed | Shares bought | Shares sold |
|---|---|---|---|---|---|---|---|
| Q2 2026 | 1,071 | 59M | 98.7% | 110 / 361 | 394 / 98 | 5M | 4M |
| Q1 2026 | 1,075 | 59M | 97.5% | 103 / 368 | 379 / 134 | 12M | 6M |
| Q4 2025 | 1,117 | 61M | 100.0% | 154 / 364 | 350 / 71 | 5M | 6M |
| Q3 2025 | 1,053 | 61M | 100.0% | 133 / 368 | 342 / 65 | 5M | 3M |
| Q2 2025 | 998 | 60M | 99.7% | 131 / 379 | 321 / 75 | 5M | 4M |
| Q1 2025 | 952 | 60M | 99.3% | 110 / 352 | 325 / 136 | 5M | 4M |
| Q4 2024 | 991 | 59M | 98.5% | 153 / 352 | 330 / 89 | 4M | 7M |
| Q3 2024 | 945 | 63M | 100.0% | 91 / 367 | 318 / 78 | 9M | 4M |
| Q2 2024 | 939 | 62M | 100.0% | 88 / 333 | 334 / 98 | 3M | 5M |
| Q1 2024 | 956 | 63M | 100.0% | 136 / 307 | 351 / 59 | 5M | 4M |
| Q4 2023 | 887 | 62M | 100.0% | 141 / 322 | 296 / 58 | 5M | 2M |
| Q3 2023 | 814 | 59M | 97.8% | 95 / 276 | 290 / 71 | 4M | 5M |
Top mutual fund and ETF holders
Latest monthly portfolio reports (Form N-PORT)
700 funds held MLM in Q2 2026, 48% of their shares through ETFs. Each fund counts once per quarter, from its quarter-end report.
| Fund | Shares | % of MLM | Value | % of fund | As of |
|---|---|---|---|---|---|
| Vanguard Total Stock Market Index Fund | 1,912,812 | 3.18% | $1.10B | 0.05% | Jun 30, 2026 |
| MidCap Fund | 1,568,414 | 2.61% | $823.64M | 3.57% | Jul 31, 2026 |
| Vanguard 500 Index Fund | 1,556,267 | 2.59% | $897.50M | 0.05% | Jun 30, 2026 |
| Vanguard Mid-Cap Index Fund | 1,305,662 | 2.17% | $752.98M | 0.34% | Jun 30, 2026 |
| iShares Core S&P 500 ETF | 826,082 | 1.38% | $476.40M | 0.05% | Jun 30, 2026 |
| Fidelity Magellan Fund | 787,904 | 1.31% | $454.38M | 1.20% | Jun 30, 2026 |
| Fidelity 500 Index Fund | 771,751 | 1.28% | $448.88M | 0.05% | May 31, 2026 |
| Victory Pioneer Fund | 716,153 | 1.19% | $413.01M | 3.69% | Jun 30, 2026 |
| State Street(R) Materials Select Sector SPDR(R) ETF | 643,858 | 1.07% | $371.31M | 4.55% | Jun 30, 2026 |
| Vanguard Windsor Ii Fund | 621,279 | 1.03% | $326.26M | 0.49% | Jul 31, 2026 |
| Vanguard Mid-Cap Growth Index Fund | 461,634 | 0.77% | $266.22M | 0.76% | Jun 30, 2026 |
| Global X U.S. Infrastructure Development ETF | 442,364 | 0.74% | $257.30M | 1.90% | May 31, 2026 |
| Vanguard Growth Index Fund | 426,028 | 0.71% | $245.69M | 0.06% | Jun 30, 2026 |
| T. Rowe Price Mid-Cap Growth Fund, Inc. | 374,995 | 0.62% | $216.26M | 0.94% | Jun 30, 2026 |
| Vanguard Dividend Appreciation Index Fund | 339,743 | 0.57% | $178.41M | 0.14% | Jul 31, 2026 |
Officers, directors and major owners
People who filed Forms 3, 4 or 5 in the last two years
| Name | Role | Shares owned | % of shares | Latest filing |
|---|---|---|---|---|
| C. Howard Nye | Chairman, Pres & CEO, Director | 246,438 | 0.41% | Mar 3, 2026 |
| Michael J. Petro | SVP and CFO | 24,322 | 0.04% | Sep 2, 2026 |
| Christopher William Samborski | EVP, COO | 13,661 | 0.02% | May 5, 2026 |
| George Frederick Schoen | EVP, GC and Corp. Secretary | 23,673 | 0.04% | Mar 3, 2026 |
| Donald A. McCunniff | EVP and CHRO | 7,518 | 0.01% | Mar 3, 2026 |
| Robert J. Cardin | SVP, Controller & CAO | 12,459 | 0.02% | Feb 25, 2026 |
| Jason Paul Flynn | SVP and CIO | 5,494 | 0.01% | Feb 25, 2026 |
| Roselyn R. Bar | Executive Vice President | 62,594 | 0.10% | Dec 17, 2025 |
| James AJ Nickolas | EVP and CFO | 26,643 | 0.04% | Feb 25, 2025 |
| Bradley D. Kohn | SVP, General Counsel and Secy | 2,644 | 0.00% | Feb 25, 2025 |
| Oliver W. Brooks | SVP - Enterprise Excellence | 5,178 | 0.01% | Feb 25, 2025 |
| Martin J. Lyons | Director | 442 | 0.00% | Sep 2, 2026 |
| David C. Wajsgras | Director | 5,106 | 0.01% | Sep 2, 2026 |
| Thomas Pike | Director | 5,029 | 0.01% | Sep 2, 2026 |
| Philipp Niemann | Director | 337 | 0.00% | Aug 25, 2026 |
| Donald W. Slager | Director | 5,064 | 0.01% | May 18, 2026 |
| Laree E. Perez | Director | 15,730 | 0.03% | May 18, 2026 |
| Anthony R. Foxx | Director | 2,615 | 0.00% | May 18, 2026 |
| Dorothy M. Ables | Director | 4,221 | 0.01% | May 18, 2026 |
| Gayla J. Delly | Director | 0 | – | May 18, 2026 |
| Mary T. Mack | Director | 914 | 0.00% | May 18, 2026 |
| John J. Koraleski | Director | 15,722 | 0.03% | Mar 2, 2026 |
| Sue W. Cole | Director | 24,644 | 0.04% | May 16, 2025 |
| de Gestions Internationales SCA Financiere | 10% owner | – | – | Aug 24, 2026 |
| en Dolomiet Maatschappij SA Kalk | 10% owner | – | – | Aug 24, 2026 |
| Sa Gpi | 10% owner | – | – | Aug 24, 2026 |
| Holding SRL LNA | 10% owner | 10,953,543 | 18.24% | Aug 24, 2026 |
Insider trades
Common stock transactions reported on Form 4, newest first
| Insider | Date | Transaction | Shares | Price | Value | Shares after |
|---|---|---|---|---|---|---|
| Michael J. Petro SVP and CFO | Sep 1, 2026 | Award | +9,331 | – | – | 24,322 |
| David C. Wajsgras Director | Aug 31, 2026 | Award | +78 | $518.70 | $40.46K | 5,106 |
| Martin J. Lyons Director | Aug 31, 2026 | Award | +68 | $518.70 | $35.27K | 442 |
| Thomas Pike Director | Aug 31, 2026 | Award | +66 | $518.70 | $34.23K | 5,029 |
| Philipp Niemann Director | Aug 21, 2026 | Award | +337 | – | – | 337 |
| Michael J. Petro SVP and CFO | Aug 3, 2026 | Tax withholding | −368 | $542.27 | $199.56K | 14,991 |
| Thomas Pike Director | May 29, 2026 | Award | +59 | $581.64 | $34.32K | 4,963 |
| David C. Wajsgras Director | May 29, 2026 | Award | +69 | $581.64 | $40.13K | 5,028 |
| Martin J. Lyons Director | May 29, 2026 | Award | +61 | $581.64 | $35.48K | 374 |
| Dorothy M. Ables Director | May 14, 2026 | Award | +313 | – | – | 4,221 |
| Anthony R. Foxx Director | May 14, 2026 | Award | +313 | – | – | 2,615 |
| Laree E. Perez Director | May 14, 2026 | Award | +313 | – | – | 15,730 |
| Thomas Pike Director | May 14, 2026 | Award | +313 | – | – | 4,904 |
| David C. Wajsgras Director | May 14, 2026 | Award | +313 | – | – | 4,959 |
| Gayla J. Delly Director | May 14, 2026 | Award | +313 | – | – | 313 |
| Mary T. Mack Director | May 14, 2026 | Award | +313 | – | – | 914 |
| Martin J. Lyons Director | May 14, 2026 | Award | +313 | – | – | 313 |
| Donald W. Slager Director | May 14, 2026 | Award | +313 | – | – | 5,064 |
| Christopher William Samborski EVP, COO | May 1, 2026 | Award | +8,101 | – | – | 21,762 |
| George Frederick Schoen EVP, GC and Corp. Secretary | Mar 1, 2026 | Award | +23,673 | – | – | 23,673 |
| Michael J. Petro SVP and CFO | Mar 1, 2026 | Award | +2,960 | – | – | 15,359 |
| C. Howard Nye Chairman, Pres & CEO, Director | Mar 1, 2026 | Award | +5,919 | – | – | 176,038 |
| Donald A. McCunniff EVP and CHRO | Mar 1, 2026 | Award | +2,960 | – | – | 7,518 |
| John J. Koraleski Director | Feb 27, 2026 | Award | +69 | $676.57 | $46.68K | 8,822 |
| David C. Wajsgras Director | Feb 27, 2026 | Award | +56 | $676.57 | $37.89K | 4,646 |
| Thomas Pike Director | Feb 27, 2026 | Award | +47 | $676.57 | $31.80K | 4,591 |
| Michael J. Petro SVP and CFO | Feb 24, 2026 | Tax withholding | −94 | $696.85 | $65.50K | 12,399 |
| Robert J. Cardin SVP, Controller & CAO | Feb 24, 2026 | Tax withholding | −103 | $696.85 | $71.78K | 12,459 |
| C. Howard Nye Chairman, Pres & CEO, Director | Feb 24, 2026 | Tax withholding | −1,221 | $696.85 | $850.85K | 170,119 |
| Jason Paul Flynn SVP and CIO | Feb 24, 2026 | Tax withholding | −30 | $696.85 | $20.91K | 5,494 |
| Michael J. Petro SVP and CFO | Feb 23, 2026 | Tax withholding | −211 | $683.60 | $144.24K | 12,493 |
| Robert J. Cardin SVP, Controller & CAO | Feb 23, 2026 | Tax withholding | −209 | $683.60 | $142.87K | 12,562 |
| C. Howard Nye Chairman, Pres & CEO, Director | Feb 23, 2026 | Tax withholding | −1,805 | $683.60 | $1.23M | 171,340 |
| Donald A. McCunniff EVP and CHRO | Feb 23, 2026 | Tax withholding | −192 | $683.60 | $131.25K | 4,558 |
| Jason Paul Flynn SVP and CIO | Feb 23, 2026 | Tax withholding | −177 | $683.60 | $121.00K | 5,524 |
| Michael J. Petro SVP and CFO | Feb 20, 2026 | Award | +931 | – | – | 12,704 |
| Robert J. Cardin SVP, Controller & CAO | Feb 20, 2026 | Award | +658 | – | – | 12,771 |
| Donald A. McCunniff EVP and CHRO | Feb 20, 2026 | Award | +1,277 | – | – | 4,750 |
| Jason Paul Flynn SVP and CIO | Feb 20, 2026 | Award | +592 | $548.75 | $324.86K | 5,106 |
| Jason Paul Flynn SVP and CIO | Feb 20, 2026 | Award | +595 | – | – | 5,701 |
| C. Howard Nye Chairman, Pres & CEO, Director | Feb 20, 2026 | Award | +2,216 | $548.75 | $1.22M | 166,740 |
| C. Howard Nye Chairman, Pres & CEO, Director | Feb 20, 2026 | Award | +6,405 | – | – | 173,145 |
| C. Howard Nye Chairman, Pres & CEO, Director | Feb 17, 2026 | Tax withholding | −9,717 | $666.53 | $6.48M | 164,524 |
| C. Howard Nye Chairman, Pres & CEO, Director | Feb 17, 2026 | Award | +22,365 | – | – | 174,241 |
| Jason Paul Flynn SVP and CIO | Feb 17, 2026 | Tax withholding | −107 | $666.53 | $71.32K | 4,514 |
| Jason Paul Flynn SVP and CIO | Feb 17, 2026 | Award | +222 | – | – | 4,621 |
| Robert J. Cardin SVP, Controller & CAO | Feb 17, 2026 | Tax withholding | −822 | $666.53 | $547.89K | 12,113 |
| Robert J. Cardin SVP, Controller & CAO | Feb 17, 2026 | Award | +1,869 | – | – | 12,935 |
| Michael J. Petro SVP and CFO | Feb 17, 2026 | Award | +1,724 | – | – | 12,531 |
| Michael J. Petro SVP and CFO | Feb 17, 2026 | Tax withholding | −758 | $666.53 | $505.23K | 11,773 |
| Roselyn R. Bar Executive Vice President | Dec 16, 2025 | Tax withholding | −66 | $629.49 | $41.55K | 62,594 |
| Robert J. Cardin SVP, Controller & CAO | Dec 16, 2025 | Tax withholding | −32 | $629.49 | $20.14K | 11,066 |
| C. Howard Nye Chairman, Pres & CEO, Director | Dec 16, 2025 | Tax withholding | −298 | $629.49 | $187.59K | 151,876 |
| Donald A. McCunniff EVP and CHRO | Dec 16, 2025 | Tax withholding | −50 | $629.49 | $31.47K | 3,473 |
| Roselyn R. Bar Executive Vice President | Dec 2, 2025 | Gift | −488 | – | – | 62,660 |
| Jason Paul Flynn SVP and CIO | Dec 1, 2025 | Tax withholding | −123 | $615.25 | $75.68K | 4,399 |
| Roselyn R. Bar Executive Vice President | Dec 1, 2025 | Tax withholding | −420 | $615.25 | $258.41K | 63,148 |
| David C. Wajsgras Director | Nov 28, 2025 | Award | +61 | $623.24 | $38.02K | 4,590 |
| Thomas Pike Director | Nov 28, 2025 | Award | +51 | $623.24 | $31.79K | 4,544 |
| John J. Koraleski Director | Nov 28, 2025 | Award | +75 | $623.24 | $46.74K | 8,753 |
Awards, option exercises, tax withholding and gifts are shown alongside open-market buys and sales. Each name links to the filing on SEC EDGAR.
Short interest
Shares sold short and not yet bought back, as of Oct 30, 2026 (FINRA, reported twice a month)
Short % of float
6.93%
3M shares short
Days to cover
3.7
At 1M shares a day
Change since last report
+5.0%
From 3M shares
Short volume, 20 days
59.1%
Of volume reported to FINRA
Shares sold short, last 12 months
Short sale volume counts trades marked short on any given day, including market-maker hedging, so it runs far higher than the share of Martin Marietta Materials's stock actually held short. Settlement fails (shares not delivered on time) peaked at 11,539 shares on Sep 29, 2026 over the last 90 days.
Planned insider sales
Notices of proposed sale filed on Form 144 before shares are sold
| Seller | Filed | Shares | Market value | Planned sale | Acquired through |
|---|---|---|---|---|---|
| Laree E. Perez Director | Aug 8, 2025 | 1,038 | $623.11K | Aug 8, 2025 | Distribution of restricted stock award |
| Donald A. McCunniff Officer | Feb 26, 2025 | 1,332 | $653.07K | Feb 26, 2025 | Stock Option Exercise |
| John P. Mohr Former SVP, CIO | Mar 19, 2024 | 3,335 | $1.99M | Mar 19, 2024 | Vesting and Distribution of Restricted Stock Units |
| Roselyn R. Bar Officer | Mar 14, 2024 | 10,000 | $6.05M | Mar 13, 2024 | Vesting and Distribution of Restricted Stock Units |
| C. Howard Nye Officer, Director | Mar 5, 2024 | 20,000 | $12.04M | Mar 5, 2024 | Vesting and Distribution of of Restricted Stock Units (shares held in Irrevocable Trust |
| Sue W. Cole Director | Feb 15, 2024 | 1,724 | $930.03K | Feb 15, 2024 | Stock Options Exercise |
| Craig M. LaTorre Former Sr. VP, CHRO | Feb 15, 2024 | 1,667 | $899.28K | Feb 15, 2024 | Distribution of stock units awarded pursuant to the Martin Marietta Incentive Stock Plan |
| Craig M. LaTorre Officer | Jul 27, 2023 | 8,078 | $3.70M | Jul 28, 2023 | Vesting and distribution of Restricted Stock Units |
| Davis Smith W Former Director | May 19, 2023 | 2,810 | $1.15M | May 19, 2023 | Distribution of deferred restricted stock awards |
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