MLM Institutional Ownership & Shareholders
MARTIN MARIETTA MATERIALS (MLM) is currently held by 1,056 institutional investors tracked by InsiderSet, with a combined reported market value of approximately $33.00B based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026.
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 $2.54B, representing an estimated loss of -6.29% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 47% 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
1,056
Total Reported Value
$33.00B
Largest Holder
Blackrock, Inc.
Largest Position
$2.71B
Insider Transactions (90d)
6
Latest Filing Quarter
Q2 2026
New Institutional Positions
37
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 | $2,535,844,743 | -$170,289,015 | -6.29% | |
| Vanguard Capital Management Llc | 0.05% | 3,929,705 | $2,266,260,874 | $2,123,651,879 | -$142,608,995 | -6.29% | |
| Vanguard Portfolio Management Llc | 0.08% | 3,197,395 | $1,843,937,697 | $1,727,904,232 | -$116,033,465 | -6.29% | |
| State Street Corp | 0.05% | 3,159,639 | $1,822,163,811 | $1,707,500,512 | -$114,663,299 | -6.29% | |
| Bank Of America Corp | 0.09% | 2,446,762 | $1,411,047,380 | $1,322,254,652 | -$88,792,728 | -6.29% | |
| Fmr Llc | 0.05% | 2,192,603 | $1,264,474,061 | $1,184,904,587 | -$79,569,474 | -6.29% | |
| Principal Financial Group Inc | 0.59% | 2,385,823 | $1,144,755,329 | $1,289,322,607 | +$144,567,278 | +12.63% | |
| Aristotle Capital Management, Llc | 2.22% | 1,831,597 | $1,056,324,799 | $989,813,335 | -$66,511,464 | -6.30% | |
| Victory Capital Management Inc | 0.58% | 1,783,432 | $1,028,511,969 | $963,784,487 | -$64,727,482 | -6.29% | |
| Price T Rowe Associates Inc | 0.09% | 1,599,324 | $922,331,000 | $864,290,683 | -$58,040,317 | -6.29% | |
| Geode Capital Management, Llc | 0.05% | 1,601,490 | $919,891,716 | $865,461,211 | -$54,430,505 | -5.92% | |
| Jpmorgan Chase & Co | 0.05% | 1,466,887 | $852,599,645 | $792,720,404 | -$59,879,241 | -7.02% | |
| TCI Fund Management | Chris Hohn | 1.44% | 1,315,109 | $758,423,360 | $710,698,055 | -$47,725,305 | -6.29% |
| Goldman Sachs Group Inc | 0.07% | 1,163,330 | $670,891,722 | $628,675,165 | -$42,216,557 | -6.29% | |
| Morgan Stanley | 0.03% | 1,012,016 | $583,631,235 | $546,903,567 | -$36,727,668 | -6.29% | |
| Select Equity Group, L.P. | 3.09% | 1,011,255 | $583,190,759 | $546,492,315 | -$36,698,444 | -6.29% | |
| Baillie Gifford & Co | 0.52% | 991,786 | $571,962,986 | $535,971,072 | -$35,991,914 | -6.29% | |
| Gardner Russo & Quinn | Thomas Russo | 4.56% | 705,367 | $406,784,959 | $381,187,380 | -$25,597,579 | -6.29% |
| King Luther Capital Management Corp | 1.54% | 653,184 | $376,691,213 | $352,987,165 | -$23,704,048 | -6.29% | |
| Invesco Ltd. | 0.03% | 649,575 | $374,610,051 | $351,036,826 | -$23,573,225 | -6.29% | |
| T. Rowe Price Investment Management, Inc. | 0.24% | 641,321 | $369,850,000 | $346,576,282 | -$23,273,718 | -6.29% | |
| Alkeon Capital Management Llc | 1.40% | 627,351 | $361,793,322 | $339,026,754 | -$22,766,568 | -6.29% | |
| Dimensional Fund Advisors Lp | 0.06% | 586,145 | $338,069,158 | $316,758,619 | -$21,310,539 | -6.30% | |
| Northern Trust Corp | 0.04% | 570,346 | $328,918,540 | $308,220,682 | -$20,697,858 | -6.29% | |
| Norges Bank | 0.03% | 557,143 | $321,304,368 | $301,085,649 | -$20,218,719 | -6.29% | |
| Charles Schwab Investment Management Inc | 0.04% | 492,536 | $284,045,511 | $266,171,380 | -$17,874,131 | -6.29% | |
| Mirae Asset Global Etfs Holdings Ltd. | 0.33% | 486,058 | $280,312,752 | $262,670,604 | -$17,642,148 | -6.29% | |
| Cibc Bancorp Usa Inc. | 0.28% | 390,665 | $225,520,673 | $211,119,273 | -$14,401,400 | -6.39% | |
| Ubs Group Ag | 0.04% | 390,429 | $225,160,405 | $210,991,736 | -$14,168,669 | -6.29% | |
| Ubs Am, A Distinct Business Unit Of Ubs Asset Management Americas Llc | 0.04% | 339,818 | $200,044,058 | $183,641,045 | -$16,403,013 | -8.20% | |
| Bank Of New York Mellon Corp | 0.03% | 345,624 | $199,321,271 | $186,778,666 | -$12,542,605 | -6.29% | |
| D1 Capital Partners L.P. | 0.57% | 345,060 | $198,996,102 | $186,473,875 | -$12,522,227 | -6.29% | |
| Vanguard Fiduciary Trust Co | 0.04% | 337,299 | $194,520,333 | $182,279,753 | -$12,240,580 | -6.29% | |
| Wells Fargo & Company/Mn | 0.03% | 278,806 | $160,787,477 | $150,669,550 | -$10,117,927 | -6.29% | |
| Davenport & Co Llc | 0.81% | 328,039 | $157,306,902 | $177,275,556 | +$19,968,654 | +12.69% | |
| Skye Global Management Lp | 2.83% | 252,000 | $145,328,400 | $136,183,320 | -$9,145,080 | -6.29% | |
| Legal & General Group Plc | 0.03% | 249,518 | $143,897,029 | $134,842,022 | -$9,055,007 | -6.29% | |
| Mawer Investment Management Ltd. | 0.95% | 241,545 | $139,299,002 | $130,533,333 | -$8,765,669 | -6.29% | |
| Hawk Ridge Capital Management Lp | 4.41% | 238,655 | $137,632,339 | $128,971,549 | -$8,660,790 | -6.29% | |
| Great Lakes Advisors, Llc | 0.99% | 226,586 | $130,674,699 | $122,449,340 | -$8,225,359 | -6.29% | |
| Deutsche Bank Ag\ | 0.04% | 225,927 | $130,292,102 | $122,093,210 | -$8,198,892 | -6.29% | |
| Raymond James Financial Inc | 0.03% | 222,584 | $128,364,366 | $120,286,619 | -$8,077,747 | -6.29% | |
| Douglass Winthrop Advisors, Llc | 2.16% | 217,073 | $125,185,999 | $117,308,420 | -$7,877,579 | -6.29% | |
| 59 North Capital Management, Lp | 2.75% | 214,146 | $123,497,998 | $115,726,640 | -$7,771,358 | -6.29% | |
| Diamond Hill Capital Management Inc | 0.99% | 213,905 | $123,359,014 | $115,596,401 | -$7,762,613 | -6.29% | |
| Findlay Park Partners Llp | 1.61% | 207,262 | $119,527,995 | $112,006,457 | -$7,521,538 | -6.29% | |
| Clearbridge Investments, Llc | 0.09% | 190,867 | $110,073,046 | $103,146,435 | -$6,926,611 | -6.29% | |
| London Co Of Virginia | 0.62% | 187,051 | $107,872,401 | $101,084,231 | -$6,788,170 | -6.29% | |
| William Blair Investment Management, Llc | 0.32% | 181,902 | $104,902,883 | $98,301,660 | -$6,601,223 | -6.29% | |
| Nuveen, Llc | 0.02% | 173,430 | $100,016,572 | $93,723,306 | -$6,293,266 | -6.29% |
Frequently asked questions about MLM
Who are the largest institutional holders of MLM?
The largest institutional holders of MLM reported in the latest SEC Form 13F filings include Blackrock, Inc., Vanguard Capital Management Llc, Vanguard Portfolio Management Llc, State Street Corp, and Bank Of America Corp. InsiderSet ranks institutional holders by their latest reported MLM position.
What is MLM institutional ownership?
This page tracks MLM positions reported by institutional investment managers through SEC Form 13F. MARTIN MARIETTA MATERIALS (MLM) institutional ownership on InsiderSet reflects disclosed 13F holdings among the managers we analyze, not every shareholder of the stock.
How many institutions own MLM?
InsiderSet currently tracks 1,056 institutional managers reporting MLM holdings in the latest available 13F data. This count reflects institutions included in the SEC Form 13F filings analyzed by InsiderSet and should not be interpreted as the total number of MLM shareholders.
How much MLM stock do institutions own?
Institutional investment managers disclosed approximately $33.00B in MLM holdings for Q2 2026. This figure is reported 13F value as of the filing period, not necessarily today's market value.
When was MLM institutional ownership last updated?
The latest MLM institutional ownership data on InsiderSet is based on SEC Form 13F filings for the quarter ended June 30, 2026. Form 13F filings are generally reported after the quarter ends, so the holdings shown represent the latest publicly disclosed positions rather than real-time institutional holdings.
Are institutional MLM holdings real-time?
No. Form 13F data is not real-time. It represents positions reported by institutional investment managers as of the end of the reporting quarter. An institution may have changed its MLM position after the reporting date.
Are institutions buying or selling MLM?
Institutional buying and selling can be analyzed by comparing MLM positions across consecutive 13F reporting periods. InsiderSet's MLM Ownership Changes page shows institutions that increased, reduced, initiated, or exited positions based on reported 13F holdings. View MLM ownership changes.
How has MLM institutional ownership changed over time?
InsiderSet tracks MLM institutional holdings across multiple 13F reporting periods, allowing investors to compare institutional holder counts, reported value, and reported shares over time.