GARDNER RUSSO & QUINN LLC

Position in MLM — Martin Marietta Materials Inc

CIK 860643 LANCASTER, PA

Position in MLM

as of Mar 31, 2026 · filed May 13, 2026 Compact

Position Value

$421,148,147

-$31,284,080 QoQ

Shares Held

715,411

-1.5% QoQ

Ownership

1.19%

of shares outstanding

% of Portfolio

9.94%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Mar 2020

25 quarters on record

Voting authority Sole 95.14418984332083.ToString("F0")% Shared 0.ToString("F0")% None 4.855810156679167.ToString("F0")%

Basic Materials · as of Mar 31, 2026

GARDNER RUSSO & QUINN LLC holds $423,125,861 across 2 Building Materials names. MLM ranks #1 (99.5% of the industry book) .

#	Ticker	Company	Shares	Value (USD)	Open
1	MLM	Martin Marietta Materials Inc This page	715,411	$421,148,147
2	VMC	Vulcan Materials CO	7,263	$1,977,714

25 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$421,148,147	715,411	-1.5%	Shares	Sole	2026-05-13
2025-12-31	$452,432,227	726,612	+5.7%	Shares	Sole	2026-02-12
2025-09-30	$433,340,820	687,537	-3.5%	Shares	Sole	2025-11-12
2025-06-30	$391,287,159	712,779	-0.2%	Shares	Sole	2025-08-13
2025-03-31	$341,505,308	714,252	+1.0%	Shares	Sole	2025-05-13
2024-12-31	$365,170,665	707,010	-5.7%	Shares	Sole	2025-02-12
2024-09-30	$403,726,254	750,072	-1.8%	Shares	Sole	2024-11-13
2024-06-30	$413,967,166	764,059	-3.0%	Shares	Sole	2024-08-13
2024-03-31	$483,465,471	787,480	-16.3%	Shares	Sole	2024-05-14
2023-12-31	$469,258,780	940,568	-1.9%	Shares	Sole	2024-02-13
2023-09-30	$393,553,036	958,763	-1.5%	Shares	Sole	2023-11-14
2023-06-30	$449,464,448	973,520	-2.8%	Shares	Sole	2023-08-11
2023-03-31	$355,535,070	1,001,338	-0.9%	Shares	Sole	2023-05-11
2022-12-31	$341,485,901	1,010,403	-5.4%	Shares	Sole	2023-02-13
2022-09-30	$343,922,226	1,067,783	-1.1%	Shares	Sole	2022-11-10
2022-06-30	$323,127,431	1,079,827	-1.2%	Shares	Sole	2022-08-04
2022-03-31	$420,673,608	1,092,971	-6.5%	Shares	Sole	2022-05-12
2021-12-31	$514,826,032	1,168,678	-2.0%	Shares	Sole	2022-02-10
2021-09-30	$407,384,038	1,192,297	-3.5%	Shares	Sole	2021-11-15
2021-06-30	$434,758,002	1,235,775	-2.7%	Shares	Sole	2021-08-12
2021-03-31	$426,676,101	1,270,550	-9.0%	Shares	Sole	2021-05-12
2020-12-31	$396,374,697	1,395,833	-7.0%	Shares	Sole	2021-02-11
2020-09-30	$353,260,767	1,500,938	-4.0%	Shares	Sole	2020-11-12
2020-06-30	$323,062,259	1,563,936	-5.2%	Shares	Sole	2020-08-14
2020-03-31	$312,194,681	1,649,816	—	Shares	Sole	2020-05-13
No filing history on record for this holder in this stock.