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SEC Form 4 research

MARTIN MARIETTA MATERIALS INC insider transactions

Inspect MARTIN MARIETTA MATERIALS INC's public SEC insider acquisitions and sales, reporting owners and source receipts.

As of 2026-10-15T08:02:39.132Z

Issuer CIK
0000916076
Reporting owners
67
Officers and directors
25
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What is a Form 4?

Animation: what a Form 4 is, shown with one real example. Sonic Automotive (SAH) reporting owner Paul P. Rusnak bought 13,701 shares at $59.78 on Wednesday, October 7, 2026, transaction code P, an open-market purchase (S is a sale and A is an award from the company). A timeline marks the SEC's two-business-day filing deadline, which ends Friday, October 9. The SEC accepted the Form 4 at 4:33:21 PM ET on October 9, and NexusTrade treats it as public one minute later, at 4:34:21 PM ET. A lamp for NexusTrade's InsiderTrades indicator stays off from the trade date until that moment, then counts one purchase worth 13,701 × $59.78 = $819,045.78.
In this example the shares were bought on Oct 7, 2026, and NexusTrade's InsiderTrades indicator can count the purchase starting at 4:34:21 PM ET on Oct 9, one minute after the SEC accepted the Form 4.

A Form 4 is the SEC filing a company insider, such as an officer, director or 10% owner, uses to report a trade in the company's stock, generally within two business days. The animation follows one real filing as an example: Paul P. Rusnak's purchase of Sonic Automotive (SAH) shares on October 7, 2026.

The same reading applies to every row on this page. The trade date is when the shares changed hands. The available date is when NexusTrade treats the filing as public, and a NexusTrade InsiderTrades indicator counts a purchase (code P) or sale (code S) only from that moment. Code A awards are not counted as purchases.

Read one actual disclosure before using it

Show the table · 1 row, 7 columns

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2026-09-032026-09-01Petro Michael JA9,331$0Not reported

First displayed source row from Recent insider disclosures. The full bounded history and coverage notes remain below.

The displayed observation date is 2026-09-01 and its public availability date is 2026-09-03. Subtracting those calendar dates gives 2 days of disclosure lag. Historical public research can use the record from the availability date, rather than backdating knowledge to the observation date. The calendar-day difference does not assert an intraday publication time.

This row is code A: a award. An award is an acquisition but is not an open-market purchase. A purchase-following rule must not count it as code P.

Open the linked original receipts to verify the row, then inspect a second record before drawing a pattern. This public filing observation supplies source evidence, not a completed copy-trading return.

SEC accession 0000916076-26-000088 ↗SEC accession 0000916076-26-000086 ↗SEC accession 0000916076-26-000084 ↗

Recent insider disclosures

This table includes purchases, sales and awards in the public filing record. Awards and open-market purchases are distinct transaction codes. For historical research, use the public availability date to determine when the transaction was knowable.

Read code P as a purchase, S as a sale and A as an award. An award is an acquisition, but it is not an open-market purchase. Open the filing receipt to check the transaction details.

Show the table · 5 rows, 7 columns

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2026-09-032026-09-01Petro Michael JA9,331$0Not reported
2026-09-032026-08-31WAJSGRAS DAVID CA78$518.7Not reported
2026-09-032026-08-31Pike ThomasA66$518.7Not reported
2026-09-032026-08-31LYONS MARTIN JA68$518.7Not reported
2026-08-262026-08-21Niemann PhilippA337$0Not reported

Most recent 90-day source activity, up to 50 rows. No rows means no matching recent records, not no historical activity.

Officers and directors in the directory

Inspect all 28 displayed rows: Officers and directors in the directory

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BAR ROSELYN R000116474426
COLE SUE W000116674714
LaTorre Craig M00017762952
McCunniff Donald A.00013558499
LLOYD ANNE H000123419213
000159581600015958169
BENNETT MARCUS C000108447912
Guzzo Dana F.000154053618
HENRY JANICE K00010844848
KORALESKI JOHN J00012000109
MAFFUCCI DAVID G00011839575
MCDONALD WILLIAM E000108448812
MENAKER FRANK H JR000108448916
MOE DONALD M000109414819
Mohr John P00017149966
Nye C Howard000137314715
PATTERSON WILLIAM J00012025513,603
PEREZ LAREE E000124315311
Petro Michael J00018781911
Quillen Michael J0001317673194
REDIKER DENNIS L000118987830
SHEPHERD DANIEL G00011162006
SIPLING PHILIP J000108449410
STEWART JONATHAN T000108449526
Vaio Bruce A000137983912
VINROOT RICHARD A000108449728
WATTERSON DAVID S00012691371
ZELNAK STEPHEN P JR0001084501142
BAR ROSELYN R ↗COLE SUE W ↗LaTorre Craig M ↗McCunniff Donald A. ↗LLOYD ANNE H ↗0001595816 ↗BENNETT MARCUS C ↗Guzzo Dana F. ↗HENRY JANICE K ↗KORALESKI JOHN J ↗MAFFUCCI DAVID G ↗MCDONALD WILLIAM E ↗MENAKER FRANK H JR ↗MOE DONALD M ↗Mohr John P ↗Nye C Howard ↗PATTERSON WILLIAM J ↗PEREZ LAREE E ↗Petro Michael J ↗Quillen Michael J ↗REDIKER DENNIS L ↗SHEPHERD DANIEL G ↗SIPLING PHILIP J ↗STEWART JONATHAN T ↗Vaio Bruce A ↗VINROOT RICHARD A ↗WATTERSON DAVID S ↗ZELNAK STEPHEN P JR ↗

Which transactions qualify for the company tracker

The company strategy uses verified officers and directors with qualifying acquisitions at this issuer. Other reporting owners may appear in source records without becoming strategy signals.

Strategy eligibility is held while filing coverage is unresolved.

Historical follower simulations are separate from these source transactions. They do not establish live trading results.