MARTIN MARIETTA MATERIALS (MLM) 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 June 30, 2026. The institutional investors covered on this page collectively reported approximately $32.22B 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 $2.71B in its June 30, 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 $2.57B, representing an estimated loss of -4.99% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 48% 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
1,060
Total Reported Value
$32.22B
Largest Holder
Blackrock, Inc.
Largest Position
$2.71B
Insider Transactions (90d)
4
Latest Filing Quarter
Q2 2026
New Institutional Positions
40
Funds Exiting Positions
1
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Blackrock, Inc. | 0.04% | 4,692,446 | $2,706,133,758 | $2,571,131,937 | -$135,001,821 | -4.99% | |
| Vanguard Capital Management Llc | 0.05% | 3,929,705 | $2,266,260,874 | $2,153,203,261 | -$113,057,613 | -4.99% | |
| Vanguard Portfolio Management Llc | 0.08% | 3,197,395 | $1,843,937,697 | $1,751,948,642 | -$91,989,055 | -4.99% | |
| State Street Corp | 0.05% | 3,159,639 | $1,822,163,811 | $1,731,260,997 | -$90,902,814 | -4.99% | |
| Bank Of America Corp | 0.09% | 2,446,762 | $1,411,047,380 | $1,340,654,303 | -$70,393,077 | -4.99% | |
| Fmr Llc | 0.05% | 2,192,603 | $1,264,474,061 | $1,201,392,962 | -$63,081,099 | -4.99% | |
| Principal Financial Group Inc | 0.60% | 2,116,369 | $1,220,529,068 | $1,159,622,066 | -$60,907,002 | -4.99% | |
| Aristotle Capital Management, Llc | 2.22% | 1,831,597 | $1,056,324,799 | $1,003,586,944 | -$52,737,855 | -4.99% | |
| Victory Capital Management Inc | 0.58% | 1,783,432 | $1,028,511,969 | $977,195,896 | -$51,316,073 | -4.99% | |
| Geode Capital Management, Llc | 0.05% | 1,601,490 | $919,891,716 | $877,504,416 | -$42,387,300 | -4.61% | |
| Jpmorgan Chase & Co | 0.05% | 1,466,887 | $852,599,645 | $803,751,394 | -$48,848,251 | -5.73% | |
| TCI Fund Management | Chris Hohn | 1.44% | 1,315,109 | $758,423,360 | $720,587,674 | -$37,835,686 | -4.99% |
| Goldman Sachs Group Inc | 0.07% | 1,163,330 | $670,891,722 | $637,423,407 | -$33,468,315 | -4.99% | |
| Morgan Stanley | 0.03% | 1,012,016 | $583,631,235 | $554,513,927 | -$29,117,308 | -4.99% | |
| Select Equity Group, L.P. | 3.09% | 1,011,255 | $583,190,759 | $554,096,952 | -$29,093,807 | -4.99% | |
| Baillie Gifford & Co | 0.52% | 991,786 | $571,962,986 | $543,429,303 | -$28,533,683 | -4.99% | |
| Gardner Russo & Quinn | Thomas Russo | 4.56% | 705,367 | $406,784,959 | $386,491,740 | -$20,293,219 | -4.99% |
| King Luther Capital Management Corp | 1.54% | 653,184 | $376,691,213 | $357,899,109 | -$18,792,104 | -4.99% | |
| Invesco Ltd. | 0.03% | 649,575 | $374,610,051 | $355,921,630 | -$18,688,421 | -4.99% | |
| Alkeon Capital Management Llc | 1.40% | 627,351 | $361,793,322 | $343,744,433 | -$18,048,889 | -4.99% | |
| Dimensional Fund Advisors Lp | 0.06% | 586,145 | $338,069,158 | $321,166,430 | -$16,902,728 | -5.00% | |
| Northern Trust Corp | 0.04% | 570,346 | $328,918,540 | $312,509,684 | -$16,408,856 | -4.99% | |
| Norges Bank | 0.03% | 557,143 | $321,304,368 | $305,275,364 | -$16,029,004 | -4.99% | |
| Charles Schwab Investment Management Inc | 0.04% | 492,536 | $284,045,511 | $269,875,250 | -$14,170,261 | -4.99% | |
| Sixth Street Partners Management Company, L.P. | 0.04% | 492,536 | $284,045,511 | $269,875,250 | -$14,170,261 | -4.99% | |
| Mirae Asset Global Etfs Holdings Ltd. | 0.33% | 486,058 | $280,312,752 | $266,325,760 | -$13,986,992 | -4.99% | |
| Cibc Bancorp Usa Inc. | 0.28% | 390,665 | $225,520,673 | $214,057,073 | -$11,463,600 | -5.08% | |
| Ubs Group Ag | 0.04% | 390,429 | $225,160,405 | $213,927,762 | -$11,232,643 | -4.99% | |
| Ubs Am, A Distinct Business Unit Of Ubs Asset Management Americas Llc | 0.04% | 339,818 | $200,044,058 | $186,196,477 | -$13,847,581 | -6.92% | |
| Bank Of New York Mellon Corp | 0.03% | 345,624 | $199,321,271 | $189,377,758 | -$9,943,513 | -4.99% | |
| D1 Capital Partners L.P. | 0.57% | 345,060 | $198,996,102 | $189,068,726 | -$9,927,376 | -4.99% | |
| Davenport & Co Llc | 0.99% | 336,791 | $194,747,976 | $184,537,893 | -$10,210,083 | -5.24% | |
| Vanguard Fiduciary Trust Co | 0.04% | 337,299 | $194,520,333 | $184,816,241 | -$9,704,092 | -4.99% | |
| Wells Fargo & Company/Mn | 0.03% | 278,806 | $160,787,477 | $152,766,172 | -$8,021,305 | -4.99% | |
| Amundi | 0.04% | 263,497 | $151,958,722 | $144,377,911 | -$7,580,811 | -4.99% | |
| Skye Global Management Lp | 2.83% | 252,000 | $145,328,400 | $138,078,360 | -$7,250,040 | -4.99% | |
| Legal & General Group Plc | 0.03% | 249,518 | $143,897,029 | $136,718,398 | -$7,178,631 | -4.99% | |
| Mawer Investment Management Ltd. | 0.95% | 241,545 | $139,299,002 | $132,349,752 | -$6,949,250 | -4.99% | |
| Hawk Ridge Capital Management Lp | 4.41% | 238,655 | $137,632,339 | $130,766,234 | -$6,866,105 | -4.99% | |
| Great Lakes Advisors, Llc | 0.99% | 226,586 | $130,674,699 | $124,153,267 | -$6,521,432 | -4.99% | |
| Deutsche Bank Ag\ | 0.04% | 225,927 | $130,292,102 | $123,792,181 | -$6,499,921 | -4.99% | |
| Raymond James Financial Inc | 0.03% | 222,584 | $128,364,366 | $121,960,451 | -$6,403,915 | -4.99% | |
| Douglass Winthrop Advisors, Llc | 2.16% | 217,073 | $125,185,999 | $118,940,809 | -$6,245,190 | -4.99% | |
| 59 North Capital Management, Lp | 2.75% | 214,146 | $123,497,998 | $117,337,018 | -$6,160,980 | -4.99% | |
| Diamond Hill Capital Management Inc | 0.99% | 213,905 | $123,359,014 | $117,204,967 | -$6,154,047 | -4.99% | |
| Findlay Park Partners Llp | 1.61% | 207,262 | $119,527,995 | $113,565,068 | -$5,962,927 | -4.99% | |
| Clearbridge Investments, Llc | 0.09% | 190,867 | $110,073,046 | $104,581,755 | -$5,491,291 | -4.99% | |
| London Co Of Virginia | 0.62% | 187,051 | $107,872,401 | $102,490,854 | -$5,381,547 | -4.99% | |
| William Blair Investment Management, Llc | 0.32% | 181,902 | $104,902,883 | $99,669,563 | -$5,233,320 | -4.99% | |
| Nuveen, Llc | 0.02% | 173,430 | $100,016,572 | $95,027,500 | -$4,989,072 | -4.99% |
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.