MARTIN MARIETTA MATERIALS (MLM) Top Institutional Shareholders
MARTIN MARIETTA MATERIALS (MLM) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended March 31, 2026. The institutional investors covered on this page collectively reported approximately $31.19B in MLM holdings during the latest filing period.
Blackrock, Inc. is currently the largest disclosed institutional shareholder of MLM tracked by InsiderSet, reporting ownership valued at approximately $2.76B in its March 31, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $2.77B, representing an estimated gain of +0.41% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 51% of the total disclosed MLM value among the investors covered in this analysis. Major shareholders include Blackrock, Inc., Vanguard Capital Management Llc, Vanguard Portfolio Management Llc, and several other long-term asset managers with concentrated positions in MARTIN MARIETTA MATERIALS (MLM).
This page ranks the largest institutional MLM shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
1,063
Total Reported Value
$31.19B
Largest Holder
Blackrock, Inc.
Largest Position
$2.76B
Insider Transactions (90d)
0
Latest Filing Quarter
Q1 2026
New Institutional Positions
60
Funds Exiting Positions
1
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Blackrock, Inc. | 0.05% | 4,685,757 | $2,758,411,492 | $2,769,657,248 | +$11,245,756 | +0.41% | |
| Vanguard Capital Management Llc | 0.06% | 3,917,383 | $2,306,085,024 | $2,315,486,744 | +$9,401,720 | +0.41% | |
| Vanguard Portfolio Management Llc | 0.10% | 3,160,444 | $1,860,490,174 | $1,868,075,240 | +$7,585,066 | +0.41% | |
| State Street Corp | 0.06% | 2,877,568 | $1,693,966,730 | $1,700,872,893 | +$6,906,163 | +0.41% | |
| Fmr Llc | 0.08% | 2,607,979 | $1,535,264,877 | $1,541,524,227 | +$6,259,350 | +0.41% | |
| Bank Of America Corp | 0.10% | 2,399,779 | $1,412,702,178 | $1,418,461,371 | +$5,759,193 | +0.41% | |
| Principal Financial Group Inc | 0.66% | 2,093,942 | $1,232,684,031 | $1,237,687,237 | +$5,003,206 | +0.41% | |
| Aristotle Capital Management, Llc | 2.41% | 1,955,100 | $1,150,975,589 | $1,155,620,508 | +$4,644,919 | +0.40% | |
| Victory Capital Management Inc | 0.62% | 1,637,147 | $963,760,400 | $967,684,849 | +$3,924,449 | +0.41% | |
| Geode Capital Management, Llc | 0.06% | 1,588,934 | $931,770,423 | $939,187,109 | +$7,416,686 | +0.80% | |
| Morgan Stanley | 0.05% | 1,341,601 | $789,775,874 | $792,993,519 | +$3,217,645 | +0.41% | |
| Baillie Gifford & Co | 0.65% | 1,087,380 | $640,118,859 | $642,728,570 | +$2,609,711 | +0.41% | |
| Select Equity Group, L.P. | 3.24% | 1,033,420 | $608,353,686 | $610,833,894 | +$2,480,208 | +0.41% | |
| Goldman Sachs Group Inc | 0.07% | 885,855 | $521,485,114 | $523,611,173 | +$2,126,059 | +0.41% | |
| Alkeon Capital Management Llc | 1.99% | 747,351 | $439,950,586 | $441,744,229 | +$1,793,643 | +0.41% | |
| Gardner Russo & Quinn | Thomas Russo | 4.96% | 715,411 | $421,148,042 | $422,865,134 | +$1,717,092 | +0.41% |
| Invesco Ltd. | 0.06% | 690,913 | $406,726,440 | $408,384,856 | +$1,658,416 | +0.41% | |
| King Luther Capital Management Corp | 1.70% | 666,722 | $392,485,907 | $394,086,040 | +$1,600,133 | +0.41% | |
| Northern Trust Corp | 0.05% | 586,501 | $345,261,408 | $346,669,011 | +$1,407,603 | +0.41% | |
| Dimensional Fund Advisors Lp | 0.07% | 546,170 | $321,442,054 | $322,830,164 | +$1,388,110 | +0.43% | |
| Franklin Resources Inc | 0.08% | 528,199 | $310,940,187 | $312,207,865 | +$1,267,678 | +0.41% | |
| Cibc Bancorp Usa Inc. | 0.38% | 474,543 | $279,431,664 | $280,492,876 | +$1,061,212 | +0.38% | |
| Charles Schwab Investment Management Inc | 0.04% | 460,519 | $271,098,325 | $272,203,571 | +$1,105,246 | +0.41% | |
| Mirae Asset Global Etfs Holdings Ltd. | 0.36% | 448,048 | $263,747,528 | $264,832,212 | +$1,084,684 | +0.41% | |
| Bank Of New York Mellon Corp | 0.04% | 370,958 | $218,375,828 | $219,265,855 | +$890,027 | +0.41% | |
| Ubs Group Ag | 0.04% | 354,168 | $208,491,619 | $209,341,621 | +$850,002 | +0.41% | |
| Ubs Am, A Distinct Business Unit Of Ubs Asset Management Americas Llc | 0.04% | 339,818 | $200,044,058 | $200,859,623 | +$815,565 | +0.41% | |
| Vanguard Fiduciary Trust Co | 0.05% | 339,289 | $199,732,649 | $200,546,942 | +$814,293 | +0.41% | |
| Davenport & Co Llc | 1.11% | 342,163 | $199,645,877 | $202,245,706 | +$2,599,829 | +1.30% | |
| D1 Capital Partners L.P. | 1.69% | 322,857 | $190,059,459 | $190,834,316 | +$774,857 | +0.41% | |
| Diamond Hill Capital Management Inc | 1.06% | 289,150 | $170,216,822 | $170,910,782 | +$693,960 | +0.41% | |
| William Blair Investment Management, Llc | 0.53% | 272,392 | $160,351,723 | $161,005,463 | +$653,740 | +0.41% | |
| Skye Global Management Lp | 3.40% | 268,000 | $157,766,240 | $158,409,440 | +$643,200 | +0.41% | |
| Wells Fargo & Company/Mn | 0.03% | 266,610 | $156,946,871 | $157,587,839 | +$640,968 | +0.41% | |
| Legal & General Group Plc | 0.04% | 266,538 | $156,905,586 | $157,545,281 | +$639,695 | +0.41% | |
| Amundi | 0.04% | 264,117 | $155,480,394 | $156,114,276 | +$633,882 | +0.41% | |
| Mawer Investment Management Ltd. | 0.97% | 255,678 | $150,512,525 | $151,126,152 | +$613,627 | +0.41% | |
| Congress Asset Management Co | 1.00% | 237,971 | $140,088,832 | $140,659,899 | +$571,067 | +0.41% | |
| Raymond James Financial Inc | 0.04% | 238,651 | $139,008,455 | $141,061,833 | +$2,053,378 | +1.48% | |
| Deutsche Bank Ag\ | 0.05% | 235,410 | $138,581,158 | $139,146,143 | +$564,985 | +0.41% | |
| Douglass Winthrop Advisors, Llc | 2.36% | 219,073 | $128,963,894 | $129,489,669 | +$525,775 | +0.41% | |
| Great Lakes Advisors, Llc | 1.06% | 217,206 | $127,866,521 | $128,386,122 | +$519,601 | +0.41% | |
| Clearbridge Investments, Llc | 0.11% | 214,672 | $126,372,908 | $126,888,326 | +$515,418 | +0.41% | |
| Findlay Park Partners Llp | 1.59% | 194,302 | $114,381,701 | $114,848,026 | +$466,325 | +0.41% | |
| London Co Of Virginia | 0.69% | 189,623 | $111,627,359 | $112,082,363 | +$455,004 | +0.41% | |
| Swiss National Bank | 0.06% | 177,030 | $104,214,020 | $104,638,892 | +$424,872 | +0.41% | |
| Envestnet Asset Management Inc | 0.03% | 172,360 | $101,465,136 | $101,878,549 | +$413,413 | +0.41% | |
| Nuveen, Llc | 0.03% | 169,295 | $99,660,581 | $100,066,889 | +$406,308 | +0.41% | |
| Rathbones Group Plc | 0.41% | 162,991 | $95,949,541 | $96,340,720 | +$391,179 | +0.41% | |
| Hawk Ridge Capital Management Lp | 3.43% | 160,535 | $94,503,744 | $94,889,028 | +$385,284 | +0.41% |
Frequently asked questions about MLM
Who owns the most MLM stock?
The largest holders of MLM are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for MARTIN MARIETTA MATERIALS (MLM).
Is MLM widely held by superinvestors?
Many widely followed stocks like MLM appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly MLM is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.