Martin Marietta Materials, Inc. MLM NYSE

NYSE • Basic Materials • Construction Materials • US • USD

SharesGrow Score

67/100

3/7 Pass

SharesGrow Intrinsic Value

Martin Marietta Materials, Inc. (MLM) has 20 known insider and institutional holders on record. The largest holder is Nye C Howard with 176,038 shares. Other notable holders include BAR ROSELYN R and LLOYD ANNE H.

Over the last 12 months, insiders have made 55 transactions in MLM stock — 32 buys (valued at $3.54M) and 1 sells (valued at $636.63K). Insider buying has outpaced selling during this period, which may signal confidence in the company's prospects.

MLM Insider Ownership

Top Holder

Nye C Howard

176,038 shares

Buys (12 mo)

$3.54M value

Sells (12 mo)

$636.63K value

12-Month Transaction Activity

Buy 58%

Sell 2%

Top Insider Holders

#	Name	Role	Shares Owned	Last Filed	Relative Size
1	Nye C Howard	Chairman, Pres & CEO	176,038	2026-03-03	100%
2	Bar Roselyn R	Executive Vice President	62,594	2025-12-17	36%
3	Lloyd Anne H	EVP and CFO	59,786	2017-05-24	34%
4	Zelnak Stephen P Jr	Director	52,769	2020-07-10	30%
5	Nickolas James Aj	EVP and CFO	27,093	2025-02-25	15%
6	Schoen George Frederick	EVP, Gc and Corp. Secretary	23,673	2026-03-03	13%
7	Guzzo Dana F.	SVP/controller/cao	22,027	2019-02-26	13%
8	Quillen Michael J	Director	21,306	2024-05-10	12%
9	Menaker Frank H Jr	Director	20,576	2016-03-02	12%
10	Cole Sue W	Director	20,394	2025-05-16	12%
11	Grant Daniel L.	SVP - Strategy and Development	19,329	2021-02-23	11%
12	Maffucci David G	Director	17,874	2018-06-01	10%
13	Mcdonald William E	Director	17,869	2017-03-02	10%
14	Rediker Dennis L	Director	17,775	2019-03-01	10%
15	Vinroot Richard A	Director	15,955	2016-03-02	9%
16	Perez Laree E	Director	15,417	2025-08-11	9%
17	Petro Michael J	SVP and CFO	15,359	2026-03-03	9%
18	Mohr John P	SVP - CIO	14,974	2023-12-05	9%
19	Cardin Robert J	SVP, Controller & CAO	12,562	2026-02-25	7%
20	Koraleski John J	Director	8,822	2026-03-02	5%

Recent Transactions (last 12 months)

Date	Name	Role	Type	Shares	Price	Value
2026-03-01	Schoen George Frederick	EVP, Gc and Corp. Secretary	RSU Award	23,673	-	-
2026-03-01	Schoen George Frederick	EVP, Gc and Corp. Secretary	Unknown	-	-	-
2026-03-01	Petro Michael J	SVP and CFO	RSU Award	2,960	-	-
2026-03-01	Nye C Howard	Chairman, Pres & CEO	RSU Award	5,919	-	-
2026-03-01	Mccunniff Donald A.	EVP and Chro	RSU Award	2,960	-	-
2026-02-27	Pike Thomas	Director	RSU Award	47	$676.57	$31.8K
2026-02-27	Koraleski John J	Director	RSU Award	69	$676.57	$46.68K
2026-02-27	Wajsgras David C	Director	RSU Award	56	$676.57	$37.89K
2026-02-24	Flynn Jason Paul	SVP and CIO	Tax Withholding of RSU	30	$696.85	$20.91K
2026-02-23	Flynn Jason Paul	SVP and CIO	Tax Withholding of RSU	177	$683.60	$121K
2026-02-24	Petro Michael J	SVP and CFO	Tax Withholding of RSU	94	$696.85	$65.5K
2026-02-23	Petro Michael J	SVP and CFO	Tax Withholding of RSU	211	$683.60	$144.24K
2026-02-24	Cardin Robert J	SVP, Controller & CAO	Tax Withholding of RSU	103	$696.85	$71.78K
2026-02-23	Cardin Robert J	SVP, Controller & CAO	Tax Withholding of RSU	209	$683.60	$142.87K
2026-02-24	Nye C Howard	Chairman, Pres & CEO	Tax Withholding of RSU	1,221	$696.85	$850.85K
2026-02-23	Nye C Howard	Chairman, Pres & CEO	Tax Withholding of RSU	1,805	$683.60	$1.23M
2026-02-23	Mccunniff Donald A.	EVP and Chro	Tax Withholding of RSU	192	$683.60	$131.25K
2026-02-20	Flynn Jason Paul	SVP and CIO	RSU Award	592	$548.75	$324.86K
2026-02-20	Petro Michael J	SVP and CFO	RSU Award	931	-	-
2026-02-20	Cardin Robert J	SVP, Controller & CAO	RSU Award	658	-	-
2026-02-20	Nye C Howard	Chairman, Pres & CEO	RSU Award	2,216	$548.75	$1.22M
2026-02-20	Mccunniff Donald A.	EVP and Chro	RSU Award	1,277	-	-
2026-02-17	Flynn Jason Paul	SVP and CIO	Tax Withholding of RSU	107	$666.53	$71.32K
2026-02-17	Petro Michael J	SVP and CFO	Tax Withholding of RSU	758	$666.53	$505.23K
2026-02-17	Cardin Robert J	SVP, Controller & CAO	Tax Withholding of RSU	822	$666.53	$547.89K