Martin Marietta Materials Inc
Held by 12 tracked managers as of Q2 2026 · CUSIP ⓘCUSIP: A 9-character ID for one specific security - one share class of one company, or one bond. Tickers can change and can mean different things in different countries; a CUSIP always identifies exactly the same security, which is why filings use it. Guide 573284106 · Sector ⓘGICS sectors: The 11-sector system most investors know (Global Industry Classification Standard): Technology, Health Care, Financials and so on. This site assigns each company a GICS-style sector from its SIC code, with a few hand corrections, so sector pages match the names investors expect. Guide
Educational and informational only, not personalized investment advice. Based on public filings that may be delayed or contain errors; verify with the original filings. Disclaimer
Tracked capital in this stock
Total value held (area) and number of managers (line). Dips can mean a large holder filed that quarter confidentially (e.g. Norges Bank in Q1/Q3).
Aggregate buying and selling
Net share change reported each quarter
Who owns MLM?
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Who owns MLM? — Q2 2026
Holders ranked by position size, with each one's quarter-over-quarter change.
Column filters
| # | Manager | Fund | Shares | Value ↓ | % of their portfolio | QoQ | Δ shares | Δ shares % | Est. Δ value ⓘChange in shares × this quarter's price |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Select Equity Group | Select Equity Group | 1.01M | $583.19M | 3.1% | Reduced | -22.2K | -2.1% | -$12.78M |
| 2 | Baillie Gifford | Baillie Gifford & Co | 991.79K | $571.96M | 0.5% | Reduced | -95.6K | -8.8% | -$55.13M |
| 3 | Norges Bank | Norges Bank Investment Management | 557.14K | $321.30M | 0.0% | — | — | — | — |
| 4 | Mawer | Mawer Investment Management | 241.54K | $139.30M | 0.9% | Reduced | -14.1K | -5.5% | -$8.15M |
| 5 | Diamond Hill | Diamond Hill Capital Management | 213.91K | $123.36M | 1.0% | Reduced | -75.2K | -26.0% | -$43.39M |
| 6 | Israel Englander | Millennium Management | 54.13K | $31.22M | 0.0% | Added | +39.3K | +264.2% | +$22.65M |
| 7 | Two Sigma | Two Sigma Investments | 51.43K | $29.66M | 0.0% | Reduced | -42.8K | -45.4% | -$24.67M |
| 8 | Jim Simons | Renaissance Technologies | 31.89K | $18.39M | 0.0% | New | +31.9K | — | +$18.39M |
| 9 | Ken Griffin | Citadel Advisors | 25.90K | $14.93M | 0.0% | Added | +9.2K | +54.8% | +$5.29M |
| 10 | Fred Alger | Fred Alger Management | 22.50K | $12.98M | 0.0% | Reduced | -29.8K | -57.0% | -$17.17M |
| 11 | Jeremy Grantham | GMO | 9.52K | $5.49M | 0.0% | Added | +232 | +2.5% | +$133.80K |
| 12 | David Shaw | D.E. Shaw & Co. | 1.43K | $824.68K | 0.0% | New | +1.4K | — | +$824.68K |
Column filters
| Manager | Fund | Shares sold | Value last quarter ↓ |
|---|---|---|---|
| Ken Fisher | Fisher Asset Management | -368 | $216.84K |
Politician trades
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No politician trades match these filters.