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Martin Marietta Materials, Inc. (MLM) institutional ownership

Latest close $546.87 Jul 23, 2026
Market cap$35.6B 52-week range SectorBasic Materials
Funds holding · Q1 2026
960
reported MLM position changes
Top owners · Q1 2026
No disclosed owners are available.
Institutional activity · Q1 2026
Net sold $451M
459 buyers · 501 sellers

Martin Marietta Materials, Inc. (MLM) price and institutional activity

Dates

Q1 2026

$2.8B bought by 459 investors
T. Rowe Price Associates$756MCIBC Bancorp USA Inc.$281M +457 more
$3.3B sold by 501 investors
Victory Capital Management Inc-$518MNorges-$363M +499 more
Bought Sold Totals per quarter; hover a bar for the names.

Martin Marietta Materials, Inc. (MLM) institutional activity · 960

Investor Type Est. change Change Δ Own Date
T. Rowe Price Associates · Added +$756M
Change +1.2M Date Q1 2026
T. Rowe Price Associates Added· Q1 2026 +$756M +1.2M Q1 2026
Victory Capital Management Inc · Reduced −$518M
Change −812K Date Q1 2026
Victory Capital Management Inc Reduced· Q1 2026 −$518M −812K Q1 2026
Norges · Exited −$363M
Change −570K Δ Own −100.0% Date Q1 2026
Norges Exited· Q1 2026 −$363M −570K −100.0% Q1 2026
CIBC Bancorp USA Inc. · Added +$281M
Change +441K Date Q1 2026
CIBC Bancorp USA Inc. Added· Q1 2026 +$281M +441K Q1 2026
JPMorgan Chase & Co · Reduced −$236M
Change −369K Date Q1 2026
JPMorgan Chase & Co Reduced· Q1 2026 −$236M −369K Q1 2026
D1 Capital Partners L.P. · New +$206M
Change +323K Date Q1 2026
D1 Capital Partners L.P. New· Q1 2026 +$206M +323K Q1 2026
Eagle Capital Management LLC · Reduced −$204M
Change −320K Date Q1 2026
Eagle Capital Management LLC Reduced· Q1 2026 −$204M −320K Q1 2026
FMR LLC · Reduced −$200M
Change −314K Δ Own −10.7% Date Q1 2026
FMR LLC Reduced· Q1 2026 −$200M −314K −10.7% Q1 2026
Vanguard · Added +$191M
Change +300K Date Q1 2026
Vanguard Added· Q1 2026 +$191M +300K Q1 2026
BlackRock · Added +$127M
Change +200K Date Q1 2026
BlackRock Added· Q1 2026 +$127M +200K Q1 2026
Balyasny Asset Management L.P. · Reduced −$112M
Change −175K Date Q1 2026
Balyasny Asset Management L.P. Reduced· Q1 2026 −$112M −175K Q1 2026
Diamond Hill Capital Management Inc · Reduced −$100M
Change −157K Date Q1 2026
Diamond Hill Capital Management Inc Reduced· Q1 2026 −$100M −157K Q1 2026
Freestone Grove Partners LP · Exited −$97M
Change −152K Δ Own −100.0% Date Q1 2026
Freestone Grove Partners LP Exited· Q1 2026 −$97M −152K −100.0% Q1 2026
UBS Group AG · Added +$76M
Change +120K Date Q1 2026
UBS Group AG Added· Q1 2026 +$76M +120K Q1 2026
Interval Partners, LP · Reduced −$72M
Change −113K Date Q1 2026
Interval Partners, LP Reduced· Q1 2026 −$72M −113K Q1 2026
Data through Q1 2026 · filed Jun 11, 2026
15 of 960

Famous investor activity in Martin Marietta Materials, Inc. (MLM)

Martin Marietta Materials, Inc. (MLM) insider trading

Company insiders, action and economics first; trade and filed dates last.
Dates
Insider Title Type Price Qty Value Owned ΔOwn Trade date Filed date
Wajsgras David C. · Director Grant (A) $40K
Price $581.64 Qty 69 Owned 5K Trade date May 29, 2026 Filed date Jun 2, 2026
Wajsgras David C. Director Grant (A) $581.64 69 $40K 5K May 29, 2026 Jun 2, 2026
Pike Thomas · Director Grant (A) $34K
Price $581.64 Qty 59 Owned 5K Trade date May 29, 2026 Filed date Jun 2, 2026
Pike Thomas Director Grant (A) $581.64 59 $34K 5K May 29, 2026 Jun 2, 2026
Lyons Martin J. · Director Grant (A) $35K
Price $581.64 Qty 61 Owned 374 Trade date May 29, 2026 Filed date Jun 2, 2026
Lyons Martin J. Director Grant (A) $581.64 61 $35K 374 May 29, 2026 Jun 2, 2026
Wajsgras David C. · Director Grant (A) 313
Owned 5K Trade date May 14, 2026 Filed date May 18, 2026
Wajsgras David C. Director Grant (A) 313 5K May 14, 2026 May 18, 2026
Slager Donald W. · Director Grant (A) 313
Owned 5K Trade date May 14, 2026 Filed date May 18, 2026
Slager Donald W. Director Grant (A) 313 5K May 14, 2026 May 18, 2026
Pike Thomas · Director Grant (A) 313
Owned 5K Trade date May 14, 2026 Filed date May 18, 2026
Pike Thomas Director Grant (A) 313 5K May 14, 2026 May 18, 2026
Perez Laree E. · Director Grant (A) 313
Owned 16K Trade date May 14, 2026 Filed date May 18, 2026
Perez Laree E. Director Grant (A) 313 16K May 14, 2026 May 18, 2026
Mack Mary T. · Director Grant (A) 313
Owned 914 Trade date May 14, 2026 Filed date May 18, 2026
Mack Mary T. Director Grant (A) 313 914 May 14, 2026 May 18, 2026
Lyons Martin J. · Director Grant (A) 313
Owned 313 Trade date May 14, 2026 Filed date May 18, 2026
Lyons Martin J. Director Grant (A) 313 313 May 14, 2026 May 18, 2026
Foxx Anthony R. · Director Grant (A) 313
Owned 3K Trade date May 14, 2026 Filed date May 18, 2026
Foxx Anthony R. Director Grant (A) 313 3K May 14, 2026 May 18, 2026
Delly Gayla J. · Director Grant (A) 313
Owned 313 Trade date May 14, 2026 Filed date May 18, 2026
Delly Gayla J. Director Grant (A) 313 313 May 14, 2026 May 18, 2026
Ables Dorothy M. · Director Grant (A) 313
Owned 4K Trade date May 14, 2026 Filed date May 18, 2026
Ables Dorothy M. Director Grant (A) 313 4K May 14, 2026 May 18, 2026
Samborski Christopher William · Officer Grant (A) 8K
Owned 22K Trade date May 1, 2026 Filed date May 5, 2026
Samborski Christopher William Officer Grant (A) 8K 22K May 1, 2026 May 5, 2026
Schoen George Frederick · Officer Grant (A) 24K
Owned 24K Trade date Mar 1, 2026 Filed date Mar 3, 2026
Schoen George Frederick Officer Grant (A) 24K 24K Mar 1, 2026 Mar 3, 2026
Petro Michael J. · Officer Grant (A) 3K
Owned 15K Trade date Mar 1, 2026 Filed date Mar 3, 2026
Petro Michael J. Officer Grant (A) 3K 15K Mar 1, 2026 Mar 3, 2026
15 of 56
15 of 56 Sign in to continue to older insider transactions.

Martin Marietta Materials, Inc. (MLM) activist and large shareholders

Dates
Owner/Filer identity Shares reported % of shares outstanding Filing date
Vanguard Group Inc 7.2M
% of shares outstanding 11.6% Filing date Feb 13, 2024
Vanguard Group Inc 7.2M 11.6% Feb 13, 2024
Vanguard Capital Management 4.5M
% of shares outstanding 7.5% Filing date Apr 30, 2026
Vanguard Capital Management 4.5M 7.5% Apr 30, 2026
BlackRock Inc. 4.1M
% of shares outstanding 6.7% Filing date Jan 26, 2024
BlackRock Inc. 4.1M 6.7% Jan 26, 2024
T. Rowe Price Investment Management, Inc. 3.5M
% of shares outstanding 5.7% Filing date Nov 14, 2024
T. Rowe Price Investment Management, Inc. 3.5M 5.7% Nov 14, 2024
Vanguard Portfolio Management 3.2M
% of shares outstanding 5.2% Filing date Apr 29, 2026
Vanguard Portfolio Management 3.2M 5.2% Apr 29, 2026
Baillie Gifford & Co 3.0M
% of shares outstanding 4.8% Filing date Mar 3, 2023
Baillie Gifford & Co 3.0M 4.8% Mar 3, 2023
Aristotle Capital Management, LLC 3.0M
% of shares outstanding 4.8% Filing date Feb 14, 2024
Aristotle Capital Management, LLC 3.0M 4.8% Feb 14, 2024
State Street Corp
% of shares outstanding 4.5% Filing date Feb 9, 2022
State Street Corp 4.5% Feb 9, 2022
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Martin Marietta Materials, Inc. (MLM) ownership FAQ

Who owns MLM?

960 reporting institutions disclosed MLM position changes in the Q1 2026 snapshot.

How is institutional activity calculated?

For each manager, WhoBought compares accepted consecutive 13F share counts. Share change is current shares minus prior shares. Estimated dollar change is that signed share change multiplied by the split-adjusted quarter-mean close. The activity table on this page uses Q1 2026.

What are activist and large shareholder filings?

An investor crossing 5% of a share class generally files Schedule 13D for activist intent or Schedule 13G for a passive position. The technical form names appear here rather than in the activity rows.

Where does this data come from?

Ownership and institutional activity come from SEC Form 13F filings. Insider activity comes from SEC Form 4, and large-shareholder activity from SEC Schedules 13D and 13G. FMP supplies price data only. Company logos use the local verified Parqet cache with one shared fallback.

Why are ownership reports delayed?

Form 13F is a quarterly disclosure and is normally filed after the quarter ends. Every ownership and activity value therefore names its represented period; it is not presented as a live position.

How are missing table values shown?

A muted dash marks a missing table value. It means the filing omitted the value, comparable data is unavailable, or no prior position exists for comparison.