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MLM in the 13F filings

Martin Marietta Matls Inc · CUSIP 573284106

Sector · Materials
Quarter
Q3 2026 · early filersQ2 2026Q1 2026Q4 2025Q3 2025Q2 2025Q1 2025Q4 2024Q3 2024Q2 2024Q1 2024Q4 2023
Quarter end
30 Sep 2024
the date the book describes
Filed
5 Nov 2026
latest of these filings; the earliest 5 Nov 2024
Managers listing it
10
at least, of 95 tracked, among listed positions
Comparable managers
94
filed both Q2 2024 and Q3 2024; 8 listed it in both
Shares listed
7,005,933
combined, among listed positions
Reported value
$3.8bn
combined, at the quarter end

Among the 94 comparable managers: 7 buyers (opened or added shares) and 2 sellers (trimmed or exited), at least, among listed positions. Their net change in shares is not known from listed positions, because at least one of them lists it in only one of the two quarters.

Managers listing MLM in Q3 2024

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q2 2024, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

10 of 10 holders

ActionFiling
Fidelity (FMR LLC)2,515,441$1.4bn0.08%Added+334,6055 Nov 2026 (the filing on sec.gov)
Baillie Gifford & Co2,119,177$1.1bn0.85%Trimmed-86,1435 Nov 2024 (the filing on sec.gov)
T. Rowe Price Associates Inc837,098$451m0.05%Trimmed-394,35214 Nov 2024 (the filing on sec.gov)
Invesco Ltd828,949$446m0.09%Added+140,74512 Nov 2024 (the filing on sec.gov)
Marshall Wace LLP209,102$113m0.14%Added+38,58714 Nov 2024 (the filing on sec.gov)
Egerton Capital UK LLP204,674$110m1.11%Newnew5 Nov 2024 (the filing on sec.gov)
Two Sigma Investments LP152,097$82m0.18%Added+41,73714 Nov 2024 (the filing on sec.gov)
Janus Henderson Group Ltd64,518$35munder 0.1%Held014 Nov 2024 (the filing on sec.gov)
Two Sigma Advisers LP57,300$31m0.07%Added+2,60014 Nov 2024 (the filing on sec.gov)
Schonfeld Strategic Advisors LLC17,577$9.5m0.06%Addedn.a.14 Nov 2024 (the filing on sec.gov)

Largest increases and reductions, by shares

Q2 2024 to Q3 2024, among managers that listed it in both quarters or opened it.

Increases

Reductions

New positions and exits

At least these many: a manager is shown exiting only where its own filing shows the position gone.

New (1)

Exited (0)

No exit shown by a manager’s own filing.

Ownership over time

Every quarter on file. A quarter-end value moves with the price as well as with the shares held; buyers and sellers count comparable managers, by shares.
10 in Q3 2024 to 9 in Q2 2026

Tracked managers listing it, at least.

051015202014201620182020202220242026
the quarter shown share split complete books; unmarked quarters rest on listed positionsClick a quarter to open it.
MLM by quarter
QuarterHoldersReported valueBuyersSellers
Q2 20139$969mn.a.n.a.
Q3 20135$984mn.a.n.a.
Q4 201310$1.2bnn.a.n.a.
Q1 20147$1.6bnn.a.n.a.
Q2 201412$1.9bnn.a.n.a.
Q3 201411$2.1bnn.a.n.a.
Q4 20146$1.8bnn.a.n.a.
Q1 201513$2.1bnn.a.n.a.
Q2 201510$2.0bnn.a.n.a.
Q3 201511$2.5bnn.a.n.a.
Q4 20159$2.2bnn.a.n.a.
Q1 201611$2.3bnn.a.n.a.
Q2 201612$2.6bnn.a.n.a.
Q3 201612$2.3bnn.a.n.a.
Q4 201615$3.0bnn.a.n.a.
Q1 201717$2.6bnn.a.n.a.
Q2 201716$2.7bnn.a.n.a.
Q3 20179$1.5bnn.a.n.a.
Q4 201714$1.7bnn.a.n.a.
Q1 20189$1.3bnn.a.n.a.
Q2 201811$1.9bnn.a.n.a.
Q3 20188$1.5bnn.a.n.a.
Q4 20188$1.4bnn.a.n.a.
Q1 201911$2.0bnn.a.n.a.
Q2 201911$2.1bnn.a.n.a.
Q3 201913$2.5bnn.a.n.a.
Q4 201915$2.2bnn.a.n.a.
Q1 202012$1.3bnn.a.n.a.
Q2 202010$1.2bnn.a.n.a.
Q3 20208$1.2bnn.a.n.a.
Q4 20207$1.2bnn.a.n.a.
Q1 202112$1.8bnn.a.n.a.
Q2 20217$2.1bnn.a.n.a.
Q3 20218$2.1bnn.a.n.a.
Q4 20218$3.3bnn.a.n.a.
Q1 202210$2.8bnn.a.n.a.
Q2 202211$2.0bnn.a.n.a.
Q3 202211$1.5bnn.a.n.a.
Q4 202211$1.7bnn.a.n.a.
Q1 202314$1.6bnn.a.n.a.
Q2 202315$2.3bnn.a.n.a.
Q3 202317$2.9bnn.a.n.a.
Q4 202316$3.4bn79
Q1 202415$4.3bn79
Q2 202411$4.0bn75
Q3 202410$3.8bn72
Q4 202410$3.4bn64
Q1 202511$2.7bn83
Q2 202513$3.0bn77
Q3 20258$3.2bn35
Q4 202510$3.6bn1611
Q1 20269$3.8bn1018
Q2 20269$4.2bn1813

Compare with…

Holders over time, buyers and sellers, and the managers holding both, side by side for up to four stocks.

MLM and LIN →MLM and GLW →MLM and HWM →Choose a stock to compare with MLM →

How much of the picture this is

A 13F is a manager’s long US-listed equity book at a quarter end, filed up to 45 days later. It shows no shorts, cash, bonds or performance, and it is never today’s portfolio. Large books are listed to their largest positions, so a manager missing from this table may still hold a small position below that line. These are 95 tracked managers, not the institutional market.

Which funds own MLM, latest filings →Back to the 13F Explorer →