Insider txns (12m)
60
Stock / equity
MLM MARTIN MARIETTA MATERIALS INC
- Security
- Equity
- Size, estimated from filings
- Large cap ($10B – $200B)
- Insiders on record
- 19
- Members of Congress
- 3
- Latest trade on record
- September 1, 2026
MLM (MARTIN MARIETTA MATERIALS INC) has 60 disclosed insider transactions from 19 insiders in the last 12 months (0 open-market buys, 20 sales, about $13.2M at reported prices) and 9 congressional trades from 2 members of Congress. The most recent disclosure was filed September 9, 2026.
Open-market buys / sales
0 / 20
Congress trades (12m)
9
Distinct filers (12m)
21
Share price
Price and chart by TradingView for MARTIN MARIETTA MATERIALS INC. US share prices here are delayed, not real-time. The trade records on this page come from government filings, not from this chart.
MLM in charts
Who is trading this stock
Which people account for the buying and selling over the last 12 months?
BoughtSold
8 people account for the disclosed buying and selling in MLM over the last 12 months; the most active is Nye C Howard with $8.7M.
Insider holdings over time
Is an insider building or unwinding a position? Shares held directly after each filing.
Petro Michael JWAJSGRAS DAVID C
Petro Michael J reported 24,322 shares held after the latest filing, against 11,773 at the first on record.
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 trading MLM
Everyone who filed a Form 4 for this ticker, by number of rows on record. "Bought" and "sold" count open-market purchases (code P) and sales only; awards, option exercises and shares withheld for tax are in the row count but not in those two columns. Showing 15 of 19.
| Insider | Role | Rows | Bought | Sold | Value bought | Value sold | Latest |
|---|---|---|---|---|---|---|---|
| Petro Michael J | SVP and CFO | 8 | 0 | 4 | — | $915K | September 1, 2026 |
| Nye C Howard | Director | 8 | 0 | 4 | — | $8.7M | March 1, 2026 |
| Flynn Jason Paul | SVP and CIO | 7 | 0 | 4 | — | $289K | February 24, 2026 |
| Cardin Robert J | SVP, Controller & CAO | 6 | 0 | 4 | — | $783K | February 24, 2026 |
| Pike Thomas | Director | 5 | 0 | 0 | — | — | August 31, 2026 |
| WAJSGRAS DAVID C | Director | 5 | 0 | 0 | — | — | August 31, 2026 |
| McCunniff Donald A. | EVP and CHRO | 4 | 0 | 2 | — | $163K | March 1, 2026 |
| LYONS MARTIN J | Director | 3 | 0 | 0 | — | — | August 31, 2026 |
| BAR ROSELYN R | Executive Vice President | 3 | 0 | 2 | — | $300K | December 16, 2025 |
| KORALESKI JOHN J | Director | 2 | 0 | 0 | — | — | February 27, 2026 |
| Niemann Philipp | Director | 1 | 0 | 0 | — | — | August 21, 2026 |
| Ables Dorothy M | Director | 1 | 0 | 0 | — | — | May 14, 2026 |
| DELLY GAYLA J | Director | 1 | 0 | 0 | — | — | May 14, 2026 |
| Foxx Anthony R | Director | 1 | 0 | 0 | — | — | May 14, 2026 |
| Mack Mary T | Director | 1 | 0 | 0 | — | — | May 14, 2026 |
What kind of transactions these are 3 Form 4 codes
| Code | Meaning | Rows | Shares | Value at reported prices |
|---|---|---|---|---|
| A | Grant or award | 39 | 95,712 | $2.0M |
| F | Shares withheld for tax | 20 | 16,803 | $11.2M |
| G | Gift | 1 | 488 | — |
What each code means: Form 4 transaction codes.
Members of Congress trading MLM
Members whose periodic transaction reports name this ticker. Amounts are the sums of the ranges as filed.
| 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 | Side | Trade date | Disclosed | Lag | Shares | Price | Value | Flags | Source | Share |
|---|---|---|---|---|---|---|---|---|---|---|
| Petro Michael J | Other A | September 1, 2026 | September 2, 2026 | 1d | 9,331 | — | — | Form 4 ↗ | ||
| WAJSGRAS DAVID C | Other A | August 31, 2026 | September 2, 2026 | 2d | 78 | $519 | $40K | Form 4 ↗ | ||
| Pike Thomas | Other A | August 31, 2026 | September 2, 2026 | 2d | 66 | $519 | $34K | Form 4 ↗ | ||
| LYONS MARTIN J | Other A | August 31, 2026 | September 2, 2026 | 2d | 68 | $519 | $35K | Form 4 ↗ | ||
| Niemann Philipp | Other A | August 21, 2026 | August 25, 2026 | 4d | 337 | — | — | Form 4 ↗ | ||
| Petro Michael J | Sell F | August 3, 2026 | August 4, 2026 | 1d | 368 | $542 | $200K | Form 4 ↗ | ||
| WAJSGRAS DAVID C | Other A | May 29, 2026 | June 2, 2026 | 4d | 69 | $582 | $40K | Form 4 ↗ | ||
| Pike Thomas | Other A | May 29, 2026 | June 2, 2026 | 4d | 59 | $582 | $34K | Form 4 ↗ | ||
| LYONS MARTIN J | Other A | May 29, 2026 | June 2, 2026 | 4d | 61 | $582 | $35K | Form 4 ↗ | ||
| WAJSGRAS DAVID C | Other A | May 14, 2026 | May 18, 2026 | 4d | 313 | — | — | Form 4 ↗ | ||
| SLAGER DONALD W | Other A | May 14, 2026 | May 18, 2026 | 4d | 313 | — | — | Form 4 ↗ | ||
| Pike Thomas | Other A | May 14, 2026 | May 18, 2026 | 4d | 313 | — | — | Form 4 ↗ | ||
| PEREZ LAREE E | Other A | May 14, 2026 | May 18, 2026 | 4d | 313 | — | — | Form 4 ↗ | ||
| Mack Mary T | Other A | May 14, 2026 | May 18, 2026 | 4d | 313 | — | — | Form 4 ↗ | ||
| LYONS MARTIN J | Other A | May 14, 2026 | May 18, 2026 | 4d | 313 | — | — | Form 4 ↗ | ||
| Foxx Anthony R | Other A | May 14, 2026 | May 18, 2026 | 4d | 313 | — | — | Form 4 ↗ | ||
| DELLY GAYLA J | Other A | May 14, 2026 | May 18, 2026 | 4d | 313 | — | — | Form 4 ↗ | ||
| Ables Dorothy M | Other A | May 14, 2026 | May 18, 2026 | 4d | 313 | — | — | Form 4 ↗ | ||
| Samborski Christopher William | Other A | May 1, 2026 | May 5, 2026 | 4d | 8,101 | — | — | Form 4 ↗ | ||
| Schoen George Frederick | Other A | March 1, 2026 | March 3, 2026 | 2d | 23,673 | — | — | Form 4 ↗ | ||
| Petro Michael J | Other A | March 1, 2026 | March 3, 2026 | 2d | 2,960 | — | — | Form 4 ↗ | ||
| Nye C Howard | Other A | March 1, 2026 | March 3, 2026 | 2d | 5,919 | — | — | Form 4 ↗ | ||
| McCunniff Donald A. | Other A | March 1, 2026 | March 3, 2026 | 2d | 2,960 | — | — | Form 4 ↗ | ||
| WAJSGRAS DAVID C | Other A | February 27, 2026 | March 2, 2026 | 3d | 56 | $677 | $38K | Form 4 ↗ | ||
| Pike Thomas | Other A | February 27, 2026 | March 2, 2026 | 3d | 47 | $677 | $32K | Form 4 ↗ | ||
| KORALESKI JOHN J | Other A | February 27, 2026 | March 2, 2026 | 3d | 69 | $677 | $47K | Form 4 ↗ | ||
| Petro Michael J | Sell F | February 24, 2026 | February 25, 2026 | 1d | 94 | $697 | $66K | Form 4 ↗ | ||
| Petro Michael J | Sell F | February 23, 2026 | February 25, 2026 | 2d | 211 | $684 | $144K | Form 4 ↗ | ||
| Nye C Howard | Sell F | February 24, 2026 | February 25, 2026 | 1d | 1,221 | $697 | $851K | Form 4 ↗ | ||
| Nye C Howard | Sell F | February 23, 2026 | February 25, 2026 | 2d | 1,805 | $684 | $1.2M | Form 4 ↗ | ||
| McCunniff Donald A. | Sell F | February 23, 2026 | February 25, 2026 | 2d | 192 | $684 | $131K | Form 4 ↗ | ||
| Flynn Jason Paul | Sell F | February 24, 2026 | February 25, 2026 | 1d | 30 | $697 | $21K | Form 4 ↗ | ||
| Flynn Jason Paul | Sell F | February 23, 2026 | February 25, 2026 | 2d | 177 | $684 | $121K | Form 4 ↗ | ||
| Cardin Robert J | Sell F | February 24, 2026 | February 25, 2026 | 1d | 103 | $697 | $72K | Form 4 ↗ | ||
| Cardin Robert J | Sell F | February 23, 2026 | February 25, 2026 | 2d | 209 | $684 | $143K | Form 4 ↗ | ||
| Petro Michael J | Other A | February 20, 2026 | February 24, 2026 | 4d | 931 | — | — | Form 4 ↗ | ||
| Nye C Howard | Other A | February 20, 2026 | February 24, 2026 | 4d | 6,405 | — | — | Form 4 ↗ | ||
| Nye C Howard | Other A | February 20, 2026 | February 24, 2026 | 4d | 2,216 | $549 | $1.2M | Form 4 ↗ | ||
| McCunniff Donald A. | Other A | February 20, 2026 | February 24, 2026 | 4d | 1,277 | — | — | Form 4 ↗ | ||
| Flynn Jason Paul | Other A | February 20, 2026 | February 24, 2026 | 4d | 595 | — | — | Form 4 ↗ | ||
| Flynn Jason Paul | Other A | February 20, 2026 | February 24, 2026 | 4d | 592 | $549 | $325K | Form 4 ↗ | ||
| Cardin Robert J | Other A | February 20, 2026 | February 24, 2026 | 4d | 658 | — | — | Form 4 ↗ | ||
| Petro Michael J | Sell F | February 17, 2026 | February 19, 2026 | 2d | 758 | $667 | $505K | Form 4 ↗ | ||
| Petro Michael J | Other A | February 17, 2026 | February 19, 2026 | 2d | 1,724 | — | — | Form 4 ↗ | ||
| Flynn Jason Paul | Sell F | February 17, 2026 | February 19, 2026 | 2d | 107 | $667 | $71K | Form 4 ↗ | ||
| Flynn Jason Paul | Other A | February 17, 2026 | February 19, 2026 | 2d | 222 | — | — | Form 4 ↗ | ||
| Nye C Howard | Sell F | February 17, 2026 | February 19, 2026 | 2d | 9,717 | $667 | $6.5M | Form 4 ↗ | ||
| Nye C Howard | Other A | February 17, 2026 | February 19, 2026 | 2d | 22,365 | — | — | Form 4 ↗ | ||
| Cardin Robert J | Sell F | February 17, 2026 | February 19, 2026 | 2d | 822 | $667 | $548K | Form 4 ↗ | ||
| Cardin Robert J | Other A | February 17, 2026 | February 19, 2026 | 2d | 1,869 | — | — | Form 4 ↗ | ||
| Nye C Howard | Sell F | December 16, 2025 | December 17, 2025 | 1d | 298 | $629 | $188K | Form 4 ↗ | ||
| McCunniff Donald A. | Sell F | December 16, 2025 | December 17, 2025 | 1d | 50 | $629 | $31K | Form 4 ↗ | ||
| Cardin Robert J | Sell F | December 16, 2025 | December 17, 2025 | 1d | 32 | $629 | $20K | Form 4 ↗ | ||
| BAR ROSELYN R | Sell F | December 16, 2025 | December 17, 2025 | 1d | 66 | $629 | $42K | Form 4 ↗ | ||
| Flynn Jason Paul | Sell F | December 1, 2025 | December 3, 2025 | 2d | 123 | $615 | $76K | Form 4 ↗ | ||
| BAR ROSELYN R | Other G | December 2, 2025 | December 3, 2025 | 1d | 488 | — | — | Form 4 ↗ | ||
| BAR ROSELYN R | Sell F | December 1, 2025 | December 3, 2025 | 2d | 420 | $615 | $258K | Form 4 ↗ | ||
| WAJSGRAS DAVID C | Other A | November 28, 2025 | December 1, 2025 | 3d | 61 | $623 | $38K | Form 4 ↗ | ||
| Pike Thomas | Other A | November 28, 2025 | December 1, 2025 | 3d | 51 | $623 | $32K | Form 4 ↗ | ||
| KORALESKI JOHN J | Other A | November 28, 2025 | December 1, 2025 | 3d | 75 | $623 | $47K | Form 4 ↗ |
Congressional trades
| Filer | Side | Trade date | Disclosed | Lag | Shares | Price | Value | Flags | Source | Share |
|---|---|---|---|---|---|---|---|---|---|---|
| April McClain Delaney | Buy | August 19, 2026 | September 9, 2026 | 21d | — | — | $1,001–$15K | dependent | House PTR ↗ | |
| April McClain Delaney | Sell | August 25, 2026 | September 9, 2026 | 15d | — | — | $250K–$500K | dependent | House PTR ↗ | |
| April McClain Delaney | Buy | July 17, 2026 | August 3, 2026 | 17d | — | — | $1,001–$15K | dependent | House PTR ↗ | |
| April McClain Delaney | Buy | July 20, 2026 | August 3, 2026 | 14d | — | — | $1,001–$15K | dependent | House PTR ↗ | |
| April McClain Delaney | Buy | July 24, 2026 | August 3, 2026 | 10d | — | — | $15K–$50K | dependent | House PTR ↗ | |
| April McClain Delaney | Buy | May 28, 2026 | June 5, 2026 | 8d | — | — | $1,001–$15K | dependent | House PTR ↗ | |
| Josh Gottheimer | Sell | April 9, 2026 | May 19, 2026 | 40d | — | — | $15K–$50K | joint | House PTR ↗ | |
| April McClain Delaney | Buy | March 9, 2026 | April 6, 2026 | 28d | — | — | $1,001–$15K | dependent | House PTR ↗ | |
| April McClain Delaney | Buy | December 2, 2025 | January 5, 2026 | 34d | — | — | $1,001–$15K | dependent | House PTR ↗ | |
| Val T. Hoyle | Sell | September 23, 2025 | October 10, 2025 | 17d | — | — | $1,001–$15K | spouse | House PTR ↗ |
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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.
- Form 4 transaction codes P = purchase. S = sale. These are the two market trades.
- Insider buying vs insider selling Selling outweighs buying by a wide margin in normal times.
- How to read a congressional trade report Owner tells you whose asset it was: the member, the spouse, a dependent child, or held jointly.
- Why congressional trade amounts are ranges There are ten ranges; the lowest is $1,001–$15,000 and the highest is over $50,000,000.
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 |
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.
Insider rows are Form 4 filings for this issuer from SEC EDGAR; congressional rows are periodic transaction reports parsed from the House Clerk and the Senate eFD. Values use the reported price for Form 4 and the disclosed range for Congress. See methodology and corrections.
Not investment advice. Disclosures are shown as filed and may lag the trade or be amended. No recommendation is made or implied.