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Martin Marietta Materials MLM

Martin Marietta Materials is the 289th largest S&P 500 company by market cap, worth $36.0 billion. 12 directors have filed with the SEC in the last 12 months (who counts), 1 of them an executive. 7 other officers are on file. At 30 Jun 2026, Vanguard was its largest institutional holder, with 12.9% of the company.

CEO
C. Howard Nye
Sector
Materials
Sub-industry
Construction Materials
Headquarters
Raleigh, North Carolina
Founded
1993
More
Wikipedia
Market cap
$36.0B
289th largest, 23 Oct 2026 close
Revenue
$6.2B
Fiscal year 2025
Price to sales
5.9
Market cap over revenue
Employees
9,600
10-K, 31 Jan 2026
Market cap per employee
$3.8M
Market cap over employees
Connections
5
S&P 500 companies sharing a director or officer

Largest institutional holders

Each fund group's share of Martin Marietta Materials. Where a company has several share classes, the share is of its total value. Stakes are of the shares out at 30 Jun 2026; the count has since grown 18%, with the shares issued for the LNA acquisition.

13F filings for the quarter to 30 Jun 2026

These five hold 33.8% of Martin Marietta Materials.

Source: SEC Form 13F data sets, SEC XBRL shares outstanding 路 All holders

Board and officers

4 people here also hold roles at other S&P 500 companies.

Roles filed up to 30 Sep 2026

NameTitle
Directors (12)
C. Howard NyeChairman, Pres & CEOAlso at General DynamicsLast filed 3 Mar 2026Chairman, Pres & CEO
Dorothy M. AblesDirectorDirector
Gayla J. DellyDirectorAlso at BroadcomDirector
Anthony R. FoxxDirectorAlso at CDW and NXP SemiconductorsDirector
John J. KoraleskiDirectorLast filed 2 Mar 2026Director
Martin J. LyonsDirectorAlso at AmerenDirector
Mary T. MackDirectorDirector
Philipp NiemannDirectorDirector
Laree E. PerezDirectorDirector
Thomas PikeDirectorDirector
Donald W. SlagerDirectorDirector
David C. WajsgrasDirectorDirector
Officers (7)
Michael J. PetroSVP and CFOLast filed 2 Sep 2026SVP and CFO
Roselyn R. BarExecutive Vice PresidentLast filed 17 Dec 2025Executive Vice President
Robert J. CardinSVP, Controller & CAOLast filed 25 Feb 2026SVP, Controller & CAO
Jason Paul FlynnSVP and CIOLast filed 25 Feb 2026SVP and CIO
Donald A. McCunniffEVP and CHROLast filed 3 Mar 2026EVP and CHRO
Christopher William SamborskiEVP, COOLast filed 5 May 2026EVP, COO
George Frederick SchoenEVP, GC and Corp. SecretaryLast filed 3 Mar 2026EVP, GC and Corp. Secretary

Source: SEC insider filings (Forms 3, 4 and 5), Martin Marietta Materials' Form 4 filings 路 All directors and officers

Companies that share people with Martin Marietta Materials

Each person's title here, then at the other company.

  • Ameren AEE
    • Martin J. Lyons: Director here, Chairman, President & CEO there
  • Broadcom AVGO
    • Gayla J. Delly: Director here, Director there
  • CDW CDW
    • Anthony R. Foxx: Director here, Director there
  • General Dynamics GD
    • C. Howard Nye: Chairman, Pres & CEO here, Director there
  • NXP Semiconductors NXPI
    • Anthony R. Foxx: Director here, Director there

Source: SEC insider filings 路 See the whole network

Martin Marietta Materials' market cap since December 2008

Marked weeks are changes in the share count, such as a merger, not market moves.

Weekly, up to 23 Oct 2026

Show equal percentage changes as equal steps.
201020122014201620182020202220242026$36.0B

Source: Yahoo Finance closing prices, SEC XBRL shares outstanding

Workforce

Headcount at 31 Jan 2026

Employees
9,600
As of January 31, 2026, the Company has approximately 9,600 employees, of which approximately 7,100 are hourly employees and approximately 2,500 are salaried employees.
Martin Marietta Materials Form 10-K

Source: Martin Marietta Materials Form 10-K

Trades by members of Congress and officials

Trades members of Congress and senior executive branch officials disclosed, including their families'. Amounts are filed as ranges.

Trades from 20 Oct 2023 to 20 Oct 2026

8 people disclosed 24 purchases and 21 sales of Martin Marietta Materials stock since October 2023.

DateMember or officialTypeAmount
25 Aug 2026April McClain Delaney (House, D-MD)House, D-MD 路 SoldSale$250,001 to $500,000$250K to $500K
19 Aug 2026April McClain Delaney (House, D-MD)House, D-MD 路 BoughtPurchase$1,001 to $15,000$1K to $15K
24 Jul 2026April McClain Delaney (House, D-MD)House, D-MD 路 BoughtPurchase$15,001 to $50,000$15K to $50K
20 Jul 2026April McClain Delaney (House, D-MD)House, D-MD 路 BoughtPurchase$1,001 to $15,000$1K to $15K
17 Jul 2026April McClain Delaney (House, D-MD)House, D-MD 路 BoughtPurchase$1,001 to $15,000$1K to $15K
12 Jun 2026Donald J Trump (President)President 路 SoldSale$15,001 to $50,000$15K to $50K
5 Jun 2026Rohit Khanna (House, D-CA)House, D-CA 路 BoughtPurchase$15,001 to $50,000$15K to $50K
28 May 2026April McClain Delaney (House, D-MD)House, D-MD 路 BoughtPurchase$1,001 to $15,000$1K to $15K
27 Apr 2026Donald J Trump (President)President 路 BoughtPurchase$15,001 to $50,000$15K to $50K
13 Apr 2026Rohit Khanna (House, D-CA)House, D-CA 路 BoughtPurchase$1,001 to $15,000$1K to $15K

Showing 10 of 45 trades

Source: House, Senate and OGE disclosures via the Congress trading monitor

Not on file: no open-market insider buys or sales in the 12 months to 30 Sep 2026 and no WARN layoff notices under its own name since October 2023.