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Martin Marietta Materials Inc. SEC filings

In the twelve months since 23 September 2025 Martin Marietta Materials Inc. filed 33 documents with the SEC of the kinds listed here: 21 current reports (8-K), about 9 regulation fd disclosure; 8 material agreement; 4 officer or director change; 4 new financial obligation; 4 other events; 3 quarterly reports (10-Q), 2 conflict minerals reports (SD), 2 employee share plan registrations (S-8), 1 employee plan annual report (11-K), 1 annual report to shareholders (ARS), 1 proxy statement (DEF 14A). The latest, filed 18 September 2026: SD, conflict minerals report.

FiledFormWhat it was aboutPeriod or event dateFiling
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
4 November 202510-Qquarterly report30 September 2025EDGAR
4 November 20258-KResults of operations, Regulation FD disclosure4 November 2025EDGAR
24 September 2025SDconflict minerals reportEDGAR

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. Form 4, Form 144, 13F and Schedule 13D and 13G have their own pages. Prospectus supplements and correspondence are not listed.

Source

The company's filing index on EDGAR, read from the SEC's submissions feed.

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