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; 1,082 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/A | 6.41%4.56M shares | −1.06 ppfrom 7.47% | Apr 30, 20262 filings | Oct 30, 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
31 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 |
|---|---|---|---|---|---|---|
| Nov 10, 20268:34 AM ET | State Street Corp | 13G | 4.60%3.28M shares | −0.60 ppfrom 5.20%Below 5% | Sep 30, 2026 | SEC |
| Oct 30, 20261:53 PM ET | Vanguard Portfolio Management LLC | 13G/A | 4.65%3.30M shares | −0.60 ppfrom 5.25%Below 5% | Sep 30, 2026 | SEC |
| Oct 30, 202612:39 PM ET | Vanguard Capital Management LLC | 13G/A | 6.41%4.56M shares | −1.06 ppfrom 7.47% | Sep 30, 2026 | SEC |
| 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 |
| Nov 14, 2024 | T. Rowe Price Investment Management, Inc. | 13GOld format | – | New | – | SEC |
| Feb 14, 2024 | Aristotle Capital Management, LLC | 13G/AOld format | – | – | – | SEC |
| Feb 14, 2024 | Select Equity Group, L.P. | 13G/AOld format | – | – | – | SEC |
| Feb 13, 2024 | Vanguard Group Inc | 13G/AOld format | – | – | – | SEC |
| Jan 26, 20245:26 PM ET | BlackRock Inc. | 13G/AOld format | – | – | – | SEC |
| Mar 3, 2023 | Baillie Gifford & Co | 13G/AOld format | – | – | – | SEC |
| Feb 14, 2023 | Aristotle Capital Management, LLC | 13G/AOld format | – | – | – | SEC |
| Feb 14, 2023 | Select Equity Group, L.P. | 13G/AOld format | – | – | – | SEC |
| Feb 9, 2023 | Vanguard Group Inc | 13G/AOld format | – | – | – | SEC |
| Jan 31, 20235:52 PM ET | BlackRock Inc. | 13G/AOld format | – | – | – | SEC |
| Jan 20, 2023 | Baillie Gifford & Co | 13G/AOld format | – | – | – | SEC |
| Feb 14, 2022 | Aristotle Capital Management, LLC | 13G/AOld format | – | – | – | SEC |
| Feb 14, 2022 | Select Equity Group, L.P. | 13G/AOld format | – | – | – | SEC |
| Feb 10, 2022 | Vanguard Group Inc | 13G/AOld format | – | – | – | SEC |
| Feb 9, 2022 | State Street Corp | 13G/AOld format | – | – | – | SEC |
| Feb 1, 20225:14 PM ET | BlackRock Inc. | 13G/AOld format | – | – | – | SEC |
| Jan 20, 2022 | Baillie Gifford & Co | 13G/AOld format | – | – | – | 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 |
| Jan 29, 20215:22 PM ET | BlackRock Inc. | 13G/AOld format | – | – | – | SEC |
Form 144: proposed insider sales
9 notices from officers, directors and other affiliates planning to sell Martin Marietta Materials Inc shares, newest first.
| Filed (ET) | Seller | Shares to sell | Market value | Planned sale | Broker | Filing |
|---|---|---|---|---|---|---|
| Aug 8, 20252:03 PM ET | Perez Laree EDirector | 1.04K | $623.1K | Aug 8, 2025 | Fidelity Investments | SEC |
| Feb 26, 202512:04 PM ET | McCunniff Donald A.Officer | 1.33K | $653.1K | Feb 26, 2025 | Fidelity Investments | SEC |
| Mar 19, 20248:50 AM ET | Mohr John PFormer SVP, CIO | 3.33K | $1.99M | Mar 19, 2024 | Commonwealth Financial Network | SEC |
| Mar 14, 202410:45 AM ET | Bar Roselyn ROfficer | 10.0K | $6.05M | Mar 13, 2024 | J.P. Morgan Securities LLC | SEC |
| Mar 5, 202410:35 AM ET | Nye C HowardOfficer · Director | 20.0K | $12.0M | Mar 5, 2024 | J.P. Morgan Securities LLC | SEC |
| Feb 15, 20242:41 PM ET | Cole Sue WDirector | 1.72K | $930.0K | Feb 15, 2024 | Diversified Trust | SEC |
| Feb 15, 20248:53 AM ET | LaTorre Craig MFormer Sr. VP, CHRO | 1.67K | $899.3K | Feb 15, 2024 | Fidelity Investments | SEC |
| Jul 27, 20239:26 AM ET | LaTorre Craig MOfficer | 8.08K | $3.70M | Jul 28, 2023 | Fidelity Investments | SEC |
| May 19, 20234:25 PM ET | Davis Smith WFormer director | 2.81K | $1.15M | May 19, 2023 | Fidelity Investments | SEC |