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Martin Marietta Materials Inc. SEC filings

Martin Marietta Materials filed 33 documents with the SEC in the last twelve months, the latest report being the 10-Q of 4 November 2026.

Filings in twelve months3322 of them 8-K news
Latest report10-Qfiled 4 Nov 2026
Latest filing10-Q4 Nov 2026
Last results, two-day move-3.0%results filed 4 Nov 2026
New to this? How to read this page
  1. Companies file with the SEC when something happens. 10-Q and 10-K are the quarterly and annual reports; 8-K is news that cannot wait for the next report.
  2. An 8-K says which items it covers, such as results, a change at the top or a big contract. A foreign company files a 6-K instead.
  3. The results release is usually an 8-K filed the day results come out, before the 10-Q or 10-K.
  4. Every filing links to the original on EDGAR, the SEC's own site.

Twelve months of filings

by kind

Most of the filings were other company news (18). Results came out 4 times.

Each mark is one filing on the day it was filed, in rows by kind. Hover or tap a mark for the form and what it was about.

The share price around each results release

close before to close after

Over the last 4 releases the share price moved 4.5% on average in the two days around results, the most on 30 Jul 2026 (-7.8%).

11 Feb 2026-6.8%$708.11 to $660.07
30 Apr 2026+0.3%$612.85 to $614.49
30 Jul 2026-7.8%$569.66 to $525.14
4 Nov 2026-3.0%$543.87 to $527.65
Daily closeResults filed

Each ring marks a results filing. The move runs from the last close before the filing to the first close after it, so it covers results released before the open or after the close. Hover the line for any day's close.

What the company told investors on 8-K

22 filings

Martin Marietta Materials's 22 news filings (8-K) were mostly about regulation FD disclosure (9) and material agreement (8).

  • Regulation FD disclosureMaterial shared with investors, often slides or a presentation
    9 · latest 4 Nov 2026
  • Material agreementA large contract or deal was signed
    8 · latest 16 Sep 2026
  • Results of operationsThe quarterly results release
    4 · latest 4 Nov 2026
  • Officer or director changeSomeone joined, left or changed role at the top
    4 · latest 24 Aug 2026
  • New financial obligationNew debt or a borrowing
    4 · latest 18 Aug 2026
  • Other eventsNews the company chose to file
    4 · latest 14 Aug 2026
  • Acquisition or disposition completedA purchase or sale of a business closed
    2 · latest 24 Aug 2026
  • Unregistered sale of equityShares sold privately
    2 · latest 24 Aug 2026
  • Amended current reportA correction or update to an earlier 8-K
    1 · latest 4 Nov 2026
  • Termination of a material agreementA large contract ended
    1 · latest 18 Aug 2026
  • Shareholder voteResults of a vote at a shareholder meeting
    1 · latest 14 May 2026
  • Mine safetyA mine safety notice
    1 · latest 13 Feb 2026

Each line is one kind of news, with what it means in plain words. Each square is one filing; a filing can carry more than one kind, so the squares can add up to more than the filings. The date opens the latest one on EDGAR.

How it compares

every company on the site

    The bar ranks every company on the site from the lowest on the left to the highest on the right, in three equal thirds; the small figures under it are the values where each third starts, and the black tick is the middle company. The orange dot is this company; the grey ticks are the other companies in its industry (hover or tap for names). A hatched block is companies tied at none.

    Every filing as a table

    In the last twelve months Martin Marietta Materials Inc. filed 33 documents with the SEC of the kinds listed here: 22 current reports (8-K), about 9 regulation FD disclosure; 8 material agreement; 4 results of operations; 4 officer or director change; 4 new financial obligation; 3 quarterly reports (10-Q), 2 employee share plan registrations (S-8), 1 conflict minerals report (SD), 1 employee plan annual report (11-K), 1 annual report to shareholders (ARS), 1 proxy statement (DEF 14A). The latest, filed 4 November 2026: 10-Q, quarterly report. The reports, the proxy statement and the prospectus themselves, where filed, each with a link to open it, are on the documents page.

    FiledFormWhat it was aboutPeriod or event dateFiling
    4 November 202610-Qquarterly report30 September 2026EDGAR
    4 November 20268-KResults of operations, Regulation FD disclosure4 November 2026EDGAR
    4 November 20268-K/Aamended current report21 August 2026EDGAR
    18 September 2026SDconflict minerals reportEDGAR
    16 September 20268-KMaterial agreement15 September 2026EDGAR
    24 August 20268-KMaterial agreement, Acquisition or disposition completed, Unregistered sale of equity, Officer or director change, Regulation FD disclosure21 August 2026EDGAR
    18 August 20268-KMaterial agreement, Termination of a material agreement, New financial obligation18 August 2026EDGAR
    14 August 20268-KMaterial agreement, New financial obligation, Other events14 August 2026EDGAR
    12 August 20268-KMaterial agreement, Regulation FD disclosure11 August 2026EDGAR
    10 August 20268-KOther events10 August 2026EDGAR
    5 August 20268-KOther events5 August 2026EDGAR
    4 August 20268-KOfficer or director change4 August 2026EDGAR
    30 July 202610-Qquarterly report30 June 2026EDGAR
    30 July 20268-KResults of operations, Regulation FD disclosure30 July 2026EDGAR
    15 July 20268-KMaterial agreement, New financial obligation10 July 2026EDGAR
    29 June 20268-KMaterial agreement, Unregistered sale of equity, Other events27 June 2026EDGAR
    29 June 20268-KRegulation FD disclosure29 June 2026EDGAR
    18 June 202611-Kemployee plan annual report31 December 2025EDGAR
    15 May 2026S-8employee share plan registrationEDGAR
    14 May 20268-KOfficer or director change, Shareholder vote14 May 2026EDGAR
    30 April 202610-Qquarterly report31 March 2026EDGAR
    30 April 20268-KResults of operations, Regulation FD disclosure30 April 2026EDGAR
    27 April 20268-KOfficer or director change27 April 2026EDGAR
    15 April 2026ARSannual report to shareholders31 December 2025EDGAR
    15 April 2026DEF 14Aproxy statement14 May 2026EDGAR
    23 February 20268-KAcquisition or disposition completed, Regulation FD disclosure23 February 2026EDGAR
    19 February 202610-Kannual report31 December 2025EDGAR
    19 February 2026S-3ASRshelf registrationEDGAR
    13 February 20268-KMine safety11 February 2026EDGAR
    11 February 20268-KResults of operations, Regulation FD disclosure11 February 2026EDGAR
    2 January 20268-KRegulation FD disclosure31 December 2025EDGAR
    19 December 20258-KMaterial agreement, New financial obligation19 December 2025EDGAR
    13 November 2025S-8employee share plan registrationEDGAR
    An 8-K is what a company files within four business days of a material event; the SEC numbers the events, and the words here are the SEC's own headings, shortened.
    Read moreForm 4, Form 144, 13F and Schedule 13D and 13G have their own pages. Prospectus supplements and correspondence are not listed.