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Who Owns Martin Marietta Materials Inc

Every manager with more than $100m in listed equities files a 13F each quarter naming what they hold. These are the ones reporting a position in Martin Marietta Materials Inc.

Who crossed 5% of MLM →
Managers holding
34
as of 2026-09-30
Reported value
$228.3M
summed across filings
Shares held
475.9K
Added vs trimmed
12 / 11
since each filer's last quarter

Positions as of 2026-09-30

Largest first. The move is against the previous quarter that manager filed, not the previous calendar quarter.

ManagerValue
STEGINSKY CAPITAL LLCCOM135K shtrimmed$64.8M
Fenimore Asset Management IncCOM89.4K shadded$42.9M
Border to Coast Pensions Partnership LtdCommon Stock61.2K shadded$29.3M
Douglas Lane & Associates, LLCCOMMON55.8K shadded$26.8M
Gradient Investments LLCCOM43.9K shtrimmed$21.1M
CONGRESS ASSET MANAGEMENT COCOM34.9K shtrimmed$16.7M
SAPIENT CAPITAL LLCCOM20.8K shadded$10M
Mn Services Vermogensbeheer B.V.COM9.7K shheld$4.7M
Red Spruce Capital, LLCCOM6.8K shtrimmed$3.3M
Apella Capital, LLCCOM3.5K shtrimmed$1.7M
Valeo Financial Advisors, LLCStock3.1K shadded$1.5M
GAMMA Investing LLCCommon Stock3K shadded$1.4M
Farther Finance Advisors, LLCStock2.2K shadded$1.1M
Wedmont Private CapitalCOM1.5K shadded$702.1K
MassMutual Private Wealth & Trust, FSBCommon / Ordinary Stock1.1K shadded$538.8K
FERGUSON WELLMAN CAPITAL MANAGEMENT, INCCOM1K shadded$484.6K
Hardin Capital Partners, LLCCOM700 shheld$335.9K
BAKER TILLY WEALTH MANAGEMENT, LLCCOM625 shtrimmed$300.1K
Byrne Asset Management LLCCOM540 shheld$258.8K
Heartwood Wealth Advisors LLCStock477 shadded$228.9K
Breakwater Capital GroupCOM417 shtrimmed$200.1K
EASTERN BANKCOM125 shtrimmed$60K
GK Wealth Management LLCCOM67 sh—$31.9K
ATWOOD & PALMER INCCOM51 shheld$24.5K
CoreCap Advisors, LLCStock37 shtrimmed$17.8K
Marquette Asset Management, LLCCOM29 shadded$13.9K
Retirement Wealth Solutions LLCCOM23 shtrimmed$11.3K
ARMSTRONG ADVISORY GROUP, INCCOM20 shheld$9.6K
Grove Bank & TrustCOM11 shheld$5.3K
GILPIN WEALTH MANAGEMENT, LLCCOM7 sh—$3.4K
TOTH FINANCIAL ADVISORY CORPCOM7 sh—$3.4K
Wealth Enhancement Trust Services, Inc.COM2 shtrimmed$960
Davis Capital ManagementStock1 shheld$480
Trust CoStock1 shheld$480

Source: quarterly 13F filings, via EDGAR. A 13F reports positions by CUSIP alone; each CUSIP here has been confirmed against OpenFIGI rather than matched by name, because a name match would attribute one company's shareholders to another. Positions are as of quarter end and can be months old by the time they are filed, and 13F covers long equity positions only — not shorts, and not most debt. The summed value is what these filers reported, not the company's institutional ownership.

More on MLM

Company overviewEverything on MLM in one place, with the price.SEC filingsWhat MLM's 8-Ks say happened: results, departures, auditor changes.Insider tradingWhat MLM's own officers and directors buy and sell.Executive payWhat MLM awarded its chief executive, and what it became.Funds holding itWhich funds and ETFs hold MLM, and how big a bet.LobbyingWhat MLM spends lobbying Congress, and on what.Who lobbies for itThe lobbyists on MLM's account, and who they worked for.Federal contractsWhat federal agencies pay MLM.Workplace safetyWhat OSHA found at MLM's sites.AircraftThe jets on MLM's registration.

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