Martin Marietta Materials Inc
MLM- Exchange
- NYSE
- Industry
- Mining & Quarrying of Nonmetallic Minerals (No Fuels)
- SEC CIK
- 0000916076
No open-market purchases or sales by Martin Marietta Materials Inc insiders were filed in the last 90 days; 1,079 institutions reported holding it in 13F filings for Q2 2026, worth $34.2B in total; 4 superinvestors hold it, including TCI Fund Management and Gardner Russo & Quinn.
Holders of 5% or more of MLM
Holders whose latest Schedule 13D or 13G filing reports 5% or more of Martin Marietta Materials Inc, largest stake first. The change is against the holder's previous filing.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| LNA Holding SRL | 13D | 15.40%11.0M shares | New | Aug 24, 20261 filing | Aug 24, 2026 | SEC |
| Vanguard Capital Management LLC | 13G | 7.47%4.51M shares | New | Apr 30, 20261 filing | Apr 30, 2026 | SEC |
| Vanguard Portfolio Management LLC | 13G | 5.25%3.17M shares | New | Apr 29, 20261 filing | Apr 29, 2026 | SEC |
| State Street Corp | 13G | 5.20%3.16M shares | – | Feb 10, 20212 filings | Aug 7, 2026 | SEC |
Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.
13D and 13G filings
10 Schedule 13D and 13G filings on Martin Marietta Materials Inc, newest first, including old-format filings without a stake.
| Filed (ET) | Filer | Form | Stake | Change | Event date | Filing |
|---|---|---|---|---|---|---|
| Aug 24, 20264:34 PM ET | LNA Holding SRLand 3 others | 13D | 15.40%11.0M shares | New | Aug 21, 2026 | SEC |
| Aug 7, 202610:05 AM ET | State Street Corp | 13G | 5.20%3.16M shares | – | Jun 30, 2026 | SEC |
| Apr 30, 202611:39 AM ET | Vanguard Capital Management LLC | 13G | 7.47%4.51M shares | New | Mar 31, 2026 | SEC |
| Apr 29, 20262:09 PM ET | Vanguard Portfolio Management LLC | 13G | 5.25%3.17M shares | New | Mar 31, 2026 | SEC |
| Mar 27, 202610:33 AM ET | Vanguard Group Inc | 13G/A | 0.00%0 shares | –Below 5% | Mar 13, 2026 | SEC |
| Feb 14, 20259:45 AM ET | T. Rowe Price Investment Management, Inc. | 13G/A | 2.60%1.61M shares | –Below 5% | Dec 31, 2024 | SEC |
| Feb 12, 2021 | Select Equity Group, L.P. | 13GOld format | – | New | – | SEC |
| Feb 10, 2021 | Vanguard Group Inc | 13G/AOld format | – | – | – | SEC |
| Feb 10, 2021 | State Street Corp | 13GOld format | – | New | – | SEC |
| Feb 2, 2021 | Aristotle Capital Management, LLC | 13GOld format | – | New | – | SEC |
Form 144: proposed insider sales
Notices from officers, directors and other affiliates planning to sell Martin Marietta Materials Inc shares.
No Form 144 notices for Martin Marietta Materials Inc are on file.