LYTIR

Company · MLM

Martin Marietta Materials, Inc.

Name as listed on its exchange; filed with the SEC as Martin Marietta Materials Inc.

Nasdaq's symbol directory lists MLM on the New York Stock Exchange as “Martin Marietta Materials, Inc. Common Stock”.

In the 12 months to Nov 8, 2026: 4 filings by holders of 5% or more; 9 congressional trade disclosures; 9 company reports (Form 8-K, since May 26, 2026).

All insider filings at the SEC

Large holders · SEC Schedules 13D and 13G

Five percent and over

Anyone who comes to hold more than 5% of a company's voting shares must tell the SEC. A Schedule 13D is filed by a holder who may seek to influence the company; a 13G by one who states it is a passive investor. An amendment updates an earlier filing, and a stake reported as 0% means the holder says it has sold all, or nearly all, of its shares. Every recent 13D and 13G

  1. Vanguard Capital Management filed Oct 30, 2026 Schedule 13G/A passive 4,555,892 shares filing 6.41%
  2. Vanguard Portfolio Management filed Oct 30, 2026 Schedule 13G/A passive 3,304,239 shares filing 4.65%
  3. LNA Holding SRL filed Aug 24, 2026 Schedule 13D may seek influence 10,953,543 shares filing 15.4%
  4. STATE STREET CORPORATION filed Aug 7, 2026 Schedule 13G passive 3,162,829 shares filing 5.2%

Congress · STOCK Act

The Althing

Periodic transaction reports. Amounts are the ranges members report; the trade date is when it happened, the report can come up to 45 days later.

  1. April McClain Delaney (D-MD06): Sale Aug 25, 2026 reported Sep 9, 2026 one of 78 trades the member reported that day House Stocks (including ADRs) owner: dependent $250,001 - $500,000
  2. April McClain Delaney (D-MD06): Purchase Aug 19, 2026 reported Sep 9, 2026 one of 78 trades the member reported that day House Stocks (including ADRs) owner: dependent $1,001 - $15,000
  3. April McClain Delaney (D-MD06): Purchase Jul 24, 2026 reported Aug 3, 2026 one of 62 trades the member reported that day House Stocks (including ADRs) owner: dependent $15,001 - $50,000
  4. April McClain Delaney (D-MD06): Purchase Jul 20, 2026 reported Aug 3, 2026 one of 62 trades the member reported that day House Stocks (including ADRs) owner: dependent $1,001 - $15,000
  5. April McClain Delaney (D-MD06): Purchase Jul 17, 2026 reported Aug 3, 2026 one of 62 trades the member reported that day House Stocks (including ADRs) owner: dependent $1,001 - $15,000
  6. April McClain Delaney (D-MD06): Purchase May 28, 2026 reported Jun 5, 2026 one of 53 trades the member reported that day House Stocks (including ADRs) owner: dependent $1,001 - $15,000
  7. Josh Gottheimer (D-NJ05): Sale Apr 9, 2026 reported May 19, 2026 one of 26 trades the member reported that day House Stocks (including ADRs) owner: joint $15,001 - $50,000
  8. April McClain Delaney (D-MD06): Purchase Mar 9, 2026 reported Apr 6, 2026 one of 27 trades the member reported that day House Stocks (including ADRs) owner: dependent $1,001 - $15,000
  9. April McClain Delaney (D-MD06): Purchase Dec 2, 2025 reported Jan 5, 2026 one of 16 trades the member reported that day House Stocks (including ADRs) owner: dependent $1,001 - $15,000

Company reports · SEC Form 8-K

In its own words

Current reports the company filed with the SEC; most items are due within four business days of the event. Each line lists the report's items by the SEC's own titles; the filing says what happened. Reports collected since May 26, 2026; every 8-K at the SEC.

  1. Results of operations and financial condition; Regulation FD disclosure filing Nov 4, 2026
  2. Entry into a material definitive agreement filing Sep 16, 2026
  3. Entry into a material definitive agreement; Completion of acquisition or disposition of assets; Unregistered sales of equity securities; Departure or appointment of directors or officers; Regulation FD disclosure filing Aug 24, 2026
  4. Entry into a material definitive agreement; Termination of a material definitive agreement; Creation of a direct financial obligation filing Aug 18, 2026
  5. Entry into a material definitive agreement; Creation of a direct financial obligation; Other events filing Aug 14, 2026
  6. Entry into a material definitive agreement; Regulation FD disclosure filing Aug 12, 2026
  7. Other events filing Aug 10, 2026
  8. Other events filing Aug 5, 2026
  9. Departure or appointment of directors or officers filing Aug 4, 2026

Sources: SEC EDGAR (Forms 4, 144 and 8-K) and STOCK Act periodic transaction reports. Filings can be late, amended or wrong at the source; see methodology.