Finding insider trades…Reading each Form 4…Adding them up…
MLMMartin Marietta Materials Inc
Insider trades (Form 4)
Directors, top managers and anyone owning more than 10% of a company must report every time they buy, sell or receive its shares, within two business days, on a Form 4. Here is what Martin Marietta Materials's insiders did over the last year, and what each kind of trade means.
Bought on the open market$00 trades by 0 people
Sold on the open market$00 trades by 0 people
Sales that were planned ahead–made under a pre-set trading plan (Rule 10b5-1)
Filings read30the newest 30 of 49 in the last year
Buying and selling, month by month
Open-market trades only, by value. Tap a month.
DecJanFebMarAprMayJunJulAugSepOctNov
■ above the line: bought · ■ below: sold
Who traded
| Person and role | Bought | Sold | Shares held after | |
|---|---|---|---|---|
| Michael J PetroChief financial officer (SVP and CFO) | – | – | 24.3K | |
| David C WajsgrasDirector | – | – | 5.1K | |
| Thomas PikeDirector | – | – | 5.0K | |
| Martin J LyonsDirector | – | – | 442 | |
| Philipp NiemannDirector | – | – | 337 | |
| Donald W SlagerDirector | – | – | 5.1K | |
| Laree E PerezDirector | – | – | 15.7K | |
| Mary T MackDirector | – | – | 914 | |
| Anthony R FoxxDirector | – | – | 2.6K | |
| Gayla J DellyDirector | – | – | 313 | |
| Dorothy M AblesDirector | – | – | 4.2K | |
| Christopher William SamborskiChief operating officer (EVP, COO) | – | – | 21.8K | |
| George Frederick SchoenEVP, GC and Corp. Secretary | – | – | 23.7K | |
| C Howard NyeChief executive (Chairman, Pres & CEO) · Director | – | – | 176.0K | |
| Donald A. McCunniffEVP and CHRO | – | – | 7.5K | |
| John J KoraleskiDirector | – | – | 8.8K | |
| Jason Paul FlynnSVP and CIO | – | – | 5.5K |
Every trade (33)
- Sep 1, 2026Received shares or options as payMichael J Petro · Chief financial officer (SVP and CFO)A grant from the company as part of their pay, not a purchase. Form 4+9,331 sharesno price (not a sale)owns 24,321.603 after
- Aug 31, 2026Received shares or options as payDavid C Wajsgras · DirectorA grant from the company as part of their pay, not a purchase. Form 4+78 sharesat $518.70 = $40.5Kowns 5,106 after
- Aug 31, 2026Received shares or options as payThomas Pike · DirectorA grant from the company as part of their pay, not a purchase. Form 4+66 sharesat $518.70 = $34.2Kowns 5,029 after
- Aug 31, 2026Received shares or options as payMartin J Lyons · DirectorA grant from the company as part of their pay, not a purchase. Form 4+68 sharesat $518.70 = $35.3Kowns 442 after
- Aug 21, 2026Received shares or options as payPhilipp Niemann · DirectorA grant from the company as part of their pay, not a purchase. Form 4+337 sharesno price (not a sale)owns 337 after
- Aug 3, 2026Shares kept back to pay taxMichael J Petro · Chief financial officer (SVP and CFO)When share pay vests, the company keeps some shares to cover the tax bill. Not a decision to sell. Form 4−368 sharesat $542.27 = $199.6Kowns 14,990.603 after
- May 29, 2026Received shares or options as payDavid C Wajsgras · DirectorA grant from the company as part of their pay, not a purchase. Form 4+69 sharesat $581.64 = $40.1Kowns 5,028 after
- May 29, 2026Received shares or options as payThomas Pike · DirectorA grant from the company as part of their pay, not a purchase. Form 4+59 sharesat $581.64 = $34.3Kowns 4,963 after
- May 29, 2026Received shares or options as payMartin J Lyons · DirectorA grant from the company as part of their pay, not a purchase. Form 4+61 sharesat $581.64 = $35.5Kowns 374 after
- May 14, 2026Received shares or options as payDavid C Wajsgras · DirectorA grant from the company as part of their pay, not a purchase. Form 4+313 sharesno price (not a sale)owns 4,959 after
- May 14, 2026Received shares or options as payDonald W Slager · DirectorA grant from the company as part of their pay, not a purchase. Form 4+313 sharesno price (not a sale)owns 5,064 after
- May 14, 2026Received shares or options as payThomas Pike · DirectorA grant from the company as part of their pay, not a purchase. Form 4+313 sharesno price (not a sale)owns 4,904 after
- May 14, 2026Received shares or options as payLaree E Perez · DirectorA grant from the company as part of their pay, not a purchase. Form 4+313 sharesno price (not a sale)owns 15,730 after
- May 14, 2026Received shares or options as payMary T Mack · DirectorA grant from the company as part of their pay, not a purchase. Form 4+313 sharesno price (not a sale)owns 914 after
- May 14, 2026Received shares or options as payMartin J Lyons · DirectorA grant from the company as part of their pay, not a purchase. Form 4+313 sharesno price (not a sale)owns 313 after
- May 14, 2026Received shares or options as payAnthony R Foxx · DirectorA grant from the company as part of their pay, not a purchase. Form 4+313 sharesno price (not a sale)owns 2,615 after
- May 14, 2026Received shares or options as payGayla J Delly · DirectorA grant from the company as part of their pay, not a purchase. Form 4+313 sharesno price (not a sale)owns 313 after
- May 14, 2026Received shares or options as payDorothy M Ables · DirectorA grant from the company as part of their pay, not a purchase. Form 4+313 sharesno price (not a sale)owns 4,221 after
- May 1, 2026Received shares or options as payChristopher William Samborski · Chief operating officer (EVP, COO)A grant from the company as part of their pay, not a purchase. Form 4+8,101 sharesno price (not a sale)owns 21,762 after
- Mar 1, 2026Received shares or options as payGeorge Frederick Schoen · EVP, GC and Corp. SecretaryA grant from the company as part of their pay, not a purchase. Form 4+23,673 sharesno price (not a sale)owns 23,673 after
- Mar 1, 2026Received shares or options as payMichael J Petro · Chief financial officer (SVP and CFO)A grant from the company as part of their pay, not a purchase. Form 4+2,960 sharesno price (not a sale)owns 15,358.603 after
- Mar 1, 2026Received shares or options as payC Howard Nye · Chief executive (Chairman, Pres & CEO) · DirectorA grant from the company as part of their pay, not a purchase. Form 4+5,919 sharesno price (not a sale)owns 176,038 after
- Mar 1, 2026Received shares or options as payDonald A. McCunniff · EVP and CHROA grant from the company as part of their pay, not a purchase. Form 4+2,960 sharesno price (not a sale)owns 7,518 after
- Feb 27, 2026Received shares or options as payDavid C Wajsgras · DirectorA grant from the company as part of their pay, not a purchase. Form 4+56 sharesat $676.57 = $37.9Kowns 4,646 after
- Feb 27, 2026Received shares or options as payThomas Pike · DirectorA grant from the company as part of their pay, not a purchase. Form 4+47 sharesat $676.57 = $31.8Kowns 4,591 after
- Feb 27, 2026Received shares or options as payJohn J Koraleski · DirectorA grant from the company as part of their pay, not a purchase. Form 4+69 sharesat $676.57 = $46.7Kowns 8,822 after
- Feb 24, 2026Shares kept back to pay taxMichael J Petro · Chief financial officer (SVP and CFO)When share pay vests, the company keeps some shares to cover the tax bill. Not a decision to sell. Form 4−94 sharesat $696.85 = $65.5Kowns 12,398.603 after
- Feb 24, 2026Shares kept back to pay taxC Howard Nye · Chief executive (Chairman, Pres & CEO) · DirectorWhen share pay vests, the company keeps some shares to cover the tax bill. Not a decision to sell. Form 4−1,221 sharesat $696.85 = $850.9Kowns 170,119 after
- Feb 24, 2026Shares kept back to pay taxJason Paul Flynn · SVP and CIOWhen share pay vests, the company keeps some shares to cover the tax bill. Not a decision to sell. Form 4−30 sharesat $696.85 = $20.9Kowns 5,494 after
- Feb 23, 2026Shares kept back to pay taxMichael J Petro · Chief financial officer (SVP and CFO)When share pay vests, the company keeps some shares to cover the tax bill. Not a decision to sell. Form 4−211 sharesat $683.60 = $144.2Kowns 12,492.603 after
- Feb 23, 2026Shares kept back to pay taxC Howard Nye · Chief executive (Chairman, Pres & CEO) · DirectorWhen share pay vests, the company keeps some shares to cover the tax bill. Not a decision to sell. Form 4−1,805 sharesat $683.60 = $1.2Mowns 171,340 after
- Feb 23, 2026Shares kept back to pay taxDonald A. McCunniff · EVP and CHROWhen share pay vests, the company keeps some shares to cover the tax bill. Not a decision to sell. Form 4−192 sharesat $683.60 = $131.3Kowns 4,558 after
- Feb 23, 2026Shares kept back to pay taxJason Paul Flynn · SVP and CIOWhen share pay vests, the company keeps some shares to cover the tax bill. Not a decision to sell. Form 4−177 sharesat $683.60 = $121.0Kowns 5,524 after
Read straight from the Form 4 filings Martin Marietta Materials's directors, top managers and large owners sent to the SEC. Insiders sell for many reasons: taxes, diversifying, planned sales. Buying with their own money is rarer. None of this says whether to buy or sell the shares.