Company / CIK 0000916076
MARTIN MARIETTA MATERIALS INC
- Ticker
- MLM
- Size, estimated from filings
- Large cap ($10B – $200B)
- Insiders on file
- 19
- Members of Congress who traded it
- 3
- Federal contracts on record
- none matched
- Lobbying filings on record
- 4
- SEC filings
- EDGAR ↗
- Latest trade on record
- September 1, 2026
MARTIN MARIETTA MATERIALS INC (MLM) has 19 insiders on file who disclosed 60 transactions in the last 12 months (0 open-market buys, 20 sales, about $13.2M at reported prices), and 10 congressional trades in its stock are on record. No federal contract award that started in the last 180 days was found for a recipient with exactly this name, and 2 lobbying filings naming it as client report $100K in 2026.
MARTIN MARIETTA MATERIALS INC in charts
Who is trading this stock
Which people account for the buying and selling over the last 12 months?
8 people account for the disclosed buying and selling in MARTIN MARIETTA MATERIALS INC over the last 12 months; the most active is Nye C Howard with $8.7M.
Lobbying spend by quarter
How much has MARTIN MARIETTA MATERIALS INC reported spending on federal lobbying?
MARTIN MARIETTA MATERIALS INC reported $200K in lobbying over the last eight quarters, from filings matched by exact company name.
Insiders
| Name | Role | Rows | Bought | Sold | Last filed |
|---|---|---|---|---|---|
| Nye C Howard | Director | 8 | 0 | 4 | September 18, 2026 |
| Foxx Anthony R | Director | 1 | 0 | 0 | September 14, 2026 |
| Petro Michael J | SVP and CFO | 8 | 0 | 4 | September 2, 2026 |
| Pike Thomas | Director | 5 | 0 | 0 | September 2, 2026 |
| WAJSGRAS DAVID C | Director | 5 | 0 | 0 | September 2, 2026 |
| LYONS MARTIN J | Director | 3 | 0 | 0 | September 2, 2026 |
| Niemann Philipp | Director | 1 | 0 | 0 | August 25, 2026 |
| DELLY GAYLA J | Director | 1 | 0 | 0 | July 14, 2026 |
| Ables Dorothy M | Director | 1 | 0 | 0 | May 18, 2026 |
| Mack Mary T | Director | 1 | 0 | 0 | May 18, 2026 |
| PEREZ LAREE E | Director | 1 | 0 | 0 | May 18, 2026 |
| SLAGER DONALD W | Director | 1 | 0 | 0 | May 18, 2026 |
| Samborski Christopher William | EVP, COO | 1 | 0 | 0 | May 5, 2026 |
| McCunniff Donald A. | EVP and CHRO | 4 | 0 | 2 | March 3, 2026 |
| Schoen George Frederick | EVP, GC and Corp. Secretary | 1 | 0 | 0 | March 3, 2026 |
| KORALESKI JOHN J | Director | 2 | 0 | 0 | March 2, 2026 |
| Cardin Robert J | SVP, Controller & CAO | 6 | 0 | 4 | February 25, 2026 |
| Flynn Jason Paul | SVP and CIO | 7 | 0 | 4 | February 25, 2026 |
| BAR ROSELYN R | Executive Vice President | 3 | 0 | 2 | December 17, 2025 |
Rows are this company's Form 4 rows for each person. "Bought" and "sold" count open-market purchases (code P) and sales only. More in insider buying and insider selling.
Members of Congress who traded MLM
From periodic transaction reports that name the company's stock. Amounts are the sums of the ranges as filed. Every row is on the MLM page.
| Member | Seat | Trades | Bought | Sold | Range as filed | Latest |
|---|---|---|---|---|---|---|
| April McClain Delaney | Representative (MD, District 6), Democrat | 8 | 7 | 1 | $271K–$640K | August 25, 2026 |
| Josh Gottheimer | Representative (NJ, District 5), Democrat | 1 | 0 | 1 | $15K–$50K | April 9, 2026 |
| Val T. Hoyle | Representative (OR, District 4), Democrat | 1 | 0 | 1 | $1,001–$15K | September 23, 2025 |
Insider transactions
| Filer | Security | Side | Trade date | Disclosed | Lag | Shares | Price | Value | Flags | Source | Share |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Petro Michael J | MLM | Other A | September 1, 2026 | September 2, 2026 | 1d | 9,331 | — | — | Form 4 ↗ | ||
| WAJSGRAS DAVID C | MLM | Other A | August 31, 2026 | September 2, 2026 | 2d | 78 | $519 | $40K | Form 4 ↗ | ||
| Pike Thomas | MLM | Other A | August 31, 2026 | September 2, 2026 | 2d | 66 | $519 | $34K | Form 4 ↗ | ||
| LYONS MARTIN J | MLM | Other A | August 31, 2026 | September 2, 2026 | 2d | 68 | $519 | $35K | Form 4 ↗ | ||
| Niemann Philipp | MLM | Other A | August 21, 2026 | August 25, 2026 | 4d | 337 | — | — | Form 4 ↗ | ||
| Petro Michael J | MLM | Sell F | August 3, 2026 | August 4, 2026 | 1d | 368 | $542 | $200K | Form 4 ↗ | ||
| WAJSGRAS DAVID C | MLM | Other A | May 29, 2026 | June 2, 2026 | 4d | 69 | $582 | $40K | Form 4 ↗ | ||
| Pike Thomas | MLM | Other A | May 29, 2026 | June 2, 2026 | 4d | 59 | $582 | $34K | Form 4 ↗ | ||
| LYONS MARTIN J | MLM | Other A | May 29, 2026 | June 2, 2026 | 4d | 61 | $582 | $35K | Form 4 ↗ | ||
| WAJSGRAS DAVID C | MLM | Other A | May 14, 2026 | May 18, 2026 | 4d | 313 | — | — | Form 4 ↗ | ||
| SLAGER DONALD W | MLM | Other A | May 14, 2026 | May 18, 2026 | 4d | 313 | — | — | Form 4 ↗ | ||
| Pike Thomas | MLM | Other A | May 14, 2026 | May 18, 2026 | 4d | 313 | — | — | Form 4 ↗ | ||
| PEREZ LAREE E | MLM | Other A | May 14, 2026 | May 18, 2026 | 4d | 313 | — | — | Form 4 ↗ | ||
| Mack Mary T | MLM | Other A | May 14, 2026 | May 18, 2026 | 4d | 313 | — | — | Form 4 ↗ | ||
| LYONS MARTIN J | MLM | Other A | May 14, 2026 | May 18, 2026 | 4d | 313 | — | — | Form 4 ↗ | ||
| Foxx Anthony R | MLM | Other A | May 14, 2026 | May 18, 2026 | 4d | 313 | — | — | Form 4 ↗ | ||
| DELLY GAYLA J | MLM | Other A | May 14, 2026 | May 18, 2026 | 4d | 313 | — | — | Form 4 ↗ | ||
| Ables Dorothy M | MLM | Other A | May 14, 2026 | May 18, 2026 | 4d | 313 | — | — | Form 4 ↗ | ||
| Samborski Christopher William | MLM | Other A | May 1, 2026 | May 5, 2026 | 4d | 8,101 | — | — | Form 4 ↗ | ||
| Schoen George Frederick | MLM | Other A | March 1, 2026 | March 3, 2026 | 2d | 23,673 | — | — | Form 4 ↗ | ||
| Petro Michael J | MLM | Other A | March 1, 2026 | March 3, 2026 | 2d | 2,960 | — | — | Form 4 ↗ | ||
| Nye C Howard | MLM | Other A | March 1, 2026 | March 3, 2026 | 2d | 5,919 | — | — | Form 4 ↗ | ||
| McCunniff Donald A. | MLM | Other A | March 1, 2026 | March 3, 2026 | 2d | 2,960 | — | — | Form 4 ↗ | ||
| WAJSGRAS DAVID C | MLM | Other A | February 27, 2026 | March 2, 2026 | 3d | 56 | $677 | $38K | Form 4 ↗ | ||
| Pike Thomas | MLM | Other A | February 27, 2026 | March 2, 2026 | 3d | 47 | $677 | $32K | Form 4 ↗ | ||
| KORALESKI JOHN J | MLM | Other A | February 27, 2026 | March 2, 2026 | 3d | 69 | $677 | $47K | Form 4 ↗ | ||
| Petro Michael J | MLM | Sell F | February 24, 2026 | February 25, 2026 | 1d | 94 | $697 | $66K | Form 4 ↗ | ||
| Petro Michael J | MLM | Sell F | February 23, 2026 | February 25, 2026 | 2d | 211 | $684 | $144K | Form 4 ↗ | ||
| Nye C Howard | MLM | Sell F | February 24, 2026 | February 25, 2026 | 1d | 1,221 | $697 | $851K | Form 4 ↗ | ||
| Nye C Howard | MLM | Sell F | February 23, 2026 | February 25, 2026 | 2d | 1,805 | $684 | $1.2M | Form 4 ↗ | ||
| McCunniff Donald A. | MLM | Sell F | February 23, 2026 | February 25, 2026 | 2d | 192 | $684 | $131K | Form 4 ↗ | ||
| Flynn Jason Paul | MLM | Sell F | February 24, 2026 | February 25, 2026 | 1d | 30 | $697 | $21K | Form 4 ↗ | ||
| Flynn Jason Paul | MLM | Sell F | February 23, 2026 | February 25, 2026 | 2d | 177 | $684 | $121K | Form 4 ↗ | ||
| Cardin Robert J | MLM | Sell F | February 24, 2026 | February 25, 2026 | 1d | 103 | $697 | $72K | Form 4 ↗ | ||
| Cardin Robert J | MLM | Sell F | February 23, 2026 | February 25, 2026 | 2d | 209 | $684 | $143K | Form 4 ↗ | ||
| Petro Michael J | MLM | Other A | February 20, 2026 | February 24, 2026 | 4d | 931 | — | — | Form 4 ↗ | ||
| Nye C Howard | MLM | Other A | February 20, 2026 | February 24, 2026 | 4d | 6,405 | — | — | Form 4 ↗ | ||
| Nye C Howard | MLM | Other A | February 20, 2026 | February 24, 2026 | 4d | 2,216 | $549 | $1.2M | Form 4 ↗ | ||
| McCunniff Donald A. | MLM | Other A | February 20, 2026 | February 24, 2026 | 4d | 1,277 | — | — | Form 4 ↗ | ||
| Flynn Jason Paul | MLM | Other A | February 20, 2026 | February 24, 2026 | 4d | 595 | — | — | Form 4 ↗ | ||
| Flynn Jason Paul | MLM | Other A | February 20, 2026 | February 24, 2026 | 4d | 592 | $549 | $325K | Form 4 ↗ | ||
| Cardin Robert J | MLM | Other A | February 20, 2026 | February 24, 2026 | 4d | 658 | — | — | Form 4 ↗ | ||
| Petro Michael J | MLM | Sell F | February 17, 2026 | February 19, 2026 | 2d | 758 | $667 | $505K | Form 4 ↗ | ||
| Petro Michael J | MLM | Other A | February 17, 2026 | February 19, 2026 | 2d | 1,724 | — | — | Form 4 ↗ | ||
| Flynn Jason Paul | MLM | Sell F | February 17, 2026 | February 19, 2026 | 2d | 107 | $667 | $71K | Form 4 ↗ | ||
| Flynn Jason Paul | MLM | Other A | February 17, 2026 | February 19, 2026 | 2d | 222 | — | — | Form 4 ↗ | ||
| Nye C Howard | MLM | Sell F | February 17, 2026 | February 19, 2026 | 2d | 9,717 | $667 | $6.5M | Form 4 ↗ | ||
| Nye C Howard | MLM | Other A | February 17, 2026 | February 19, 2026 | 2d | 22,365 | — | — | Form 4 ↗ | ||
| Cardin Robert J | MLM | Sell F | February 17, 2026 | February 19, 2026 | 2d | 822 | $667 | $548K | Form 4 ↗ | ||
| Cardin Robert J | MLM | Other A | February 17, 2026 | February 19, 2026 | 2d | 1,869 | — | — | Form 4 ↗ | ||
| Nye C Howard | MLM | Sell F | December 16, 2025 | December 17, 2025 | 1d | 298 | $629 | $188K | Form 4 ↗ | ||
| McCunniff Donald A. | MLM | Sell F | December 16, 2025 | December 17, 2025 | 1d | 50 | $629 | $31K | Form 4 ↗ | ||
| Cardin Robert J | MLM | Sell F | December 16, 2025 | December 17, 2025 | 1d | 32 | $629 | $20K | Form 4 ↗ | ||
| BAR ROSELYN R | MLM | Sell F | December 16, 2025 | December 17, 2025 | 1d | 66 | $629 | $42K | Form 4 ↗ | ||
| Flynn Jason Paul | MLM | Sell F | December 1, 2025 | December 3, 2025 | 2d | 123 | $615 | $76K | Form 4 ↗ | ||
| BAR ROSELYN R | MLM | Other G | December 2, 2025 | December 3, 2025 | 1d | 488 | — | — | Form 4 ↗ | ||
| BAR ROSELYN R | MLM | Sell F | December 1, 2025 | December 3, 2025 | 2d | 420 | $615 | $258K | Form 4 ↗ | ||
| WAJSGRAS DAVID C | MLM | Other A | November 28, 2025 | December 1, 2025 | 3d | 61 | $623 | $38K | Form 4 ↗ | ||
| Pike Thomas | MLM | Other A | November 28, 2025 | December 1, 2025 | 3d | 51 | $623 | $32K | Form 4 ↗ | ||
| KORALESKI JOHN J | MLM | Other A | November 28, 2025 | December 1, 2025 | 3d | 75 | $623 | $47K | Form 4 ↗ |
Federal contracts (USAspending, awards started in the last 180 days)
No contract award starting in the last 180 days was found for a recipient named exactly "MARTIN MARIETTA MATERIALS INC". Subsidiaries and differently-spelled recipients are not matched — search contracts.
Lobbying (Senate LDA, as client)
| Period | Registrant | Primary issue | Amount | Source |
|---|---|---|---|---|
| 2026 Q2 | SMITH DAVIS ADVISORY & RESEARCH LLC | Transportation | $50,000 | LDA ↗ |
| 2026 Q1 | SMITH DAVIS ADVISORY & RESEARCH LLC | Transportation | $50,000 | LDA ↗ |
| 2025 Q4 | SMITH DAVIS ADVISORY & RESEARCH LLC | Transportation | $50,000 | LDA ↗ |
| 2025 Q3 | SMITH DAVIS ADVISORY & RESEARCH LLC | Transportation | $50,000 | LDA ↗ |
Related companies
Companies whose stock was traded by the same people who traded MLM, by number of filers in common. It shows overlap in public filings and nothing else.
- Uber Technologies, Inc UBER 2 filers in common
- TransDigm Group INC TDG 2 filers in common
- MICRON TECHNOLOGY INC MU 2 filers in common
- REPUBLIC SERVICES, INC. RSG 2 filers in common
- Booking Holdings Inc. BKNG 2 filers in common
- Broadcom Inc. AVGO 2 filers in common
- MICROSOFT CORP MSFT 2 filers in common
- WESTINGHOUSE AIR BRAKE TECHNOLOGIES CORP WAB 2 filers in common
Guides for this page
- What is SEC Form 4? Who files: officers, directors and owners of more than 10% of a class of the company's shares.
- Insider buying vs insider selling Selling outweighs buying by a wide margin in normal times.
- Lobbying disclosure reports Reports are due about 20 days after each quarter ends.
- What disclosure data cannot tell you Filings are late by design: up to 45 days for Congress, two business days for insiders.
Sources and method
| Source | Filings | Rows | First filed | Newest filed | Read the originals |
|---|---|---|---|---|---|
| House Clerk, periodic transaction reports | 7 | 10 | October 10, 2025 | September 9, 2026 | House Clerk search |
| SEC EDGAR, Form 4 | 49 | 60 | December 1, 2025 | September 2, 2026 | Form 4 list on EDGAR |
| Lobbying disclosure filings | 4 filings | — | — | — | LDA.gov search |
Site built October 22, 2026. Every row in the tables above links to its own filing. To quote a figure, use the Cite button at the top of the page; see how to cite and reuse.
Insiders and their transactions come from SEC EDGAR Form 4 filings for this issuer. Contracts and lobbying are matched by exact normalized name (suffixes like Inc./Corp. ignored) to USAspending recipients and LDA clients — a conservative match that misses subsidiaries on purpose. See methodology and corrections.
Not investment advice. Public records shown as filed; no recommendation is made or implied.