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MLM · HWM in the 13F filings

Two to four stocks side by side among the 95 tracked managers: who lists them, how that has moved, who bought and sold in a quarter, and which managers hold more than one.

MLMHWM
Quarter
Q2 2026Q1 2026Q4 2025Q3 2025Q2 2025Q1 2025Q4 2024Q3 2024Q2 2024Q1 2024Q4 2023

Holders over time

Tracked managers listing each stock every quarter, at least, or their combined reported value. A gap is a quarter in which no tracked manager listed it. Click a quarter to compare there.
  • MLM
  • HWM
010203040202120222023202420252026
Holders and value by quarter
QuarterMLMHWM
Q3 20208 holders, $1.2bn12 holders, $1.6bn
Q4 20207 holders, $1.2bn21 holders, $3.0bn
Q1 202112 holders, $1.8bn18 holders, $3.2bn
Q2 20217 holders, $2.1bn19 holders, $3.8bn
Q3 20218 holders, $2.1bn18 holders, $3.4bn
Q4 20218 holders, $3.3bn15 holders, $3.7bn
Q1 202210 holders, $2.8bn12 holders, $3.6bn
Q2 202211 holders, $2.0bn15 holders, $3.2bn
Q3 202211 holders, $1.5bn20 holders, $3.1bn
Q4 202211 holders, $1.7bn19 holders, $4.4bn
Q1 202314 holders, $1.6bn23 holders, $4.7bn
Q2 202315 holders, $2.3bn25 holders, $5.2bn
Q3 202317 holders, $2.9bn26 holders, $4.3bn
Q4 202316 holders, $3.4bn22 holders, $5.0bn
Q1 202415 holders, $4.3bn22 holders, $6.1bn
Q2 202411 holders, $4.0bn23 holders, $7.1bn
Q3 202410 holders, $3.8bn25 holders, $8.7bn
Q4 202410 holders, $3.4bn21 holders, $9.0bn
Q1 202511 holders, $2.7bn23 holders, $10.0bn
Q2 202513 holders, $3.0bn22 holders, $13.2bn
Q3 20258 holders, $3.2bn23 holders, $13.4bn
Q4 202510 holders, $3.6bn26 holders, $13.6bn
Q1 20269 holders, $3.8bn35 holders, $15.6bn
Q2 20269 holders, $4.2bn37 holders, $17.3bn
MLM

Martin Marietta Matls Inc

Holders
9
Reported value
$4.2bn
Buyers
18
Sellers
13

Breadth +5 among 91 comparable managers.

Materials
HWM

Howmet Aerospace Inc

Holders
37
Reported value
$17.3bn
Buyers
19
Sellers
25

Breadth -6 among 91 comparable managers.

Materials

Who holds both, Q2 2026

Among the 40 tracked managers listing any of them. "Only" is about listed positions: a manager may hold the other below its listed range.

Only MLM (3)

Baillie Gifford & Co, D1 Capital Partners LP, TCI Fund Management Ltd

Only HWM (31)

Acadian Asset Management LLC, AllianceBernstein LP, AQR Capital Management LLC, Balyasny Asset Management LLC, Bridgewater Associates LP, Capital Research Global Investors, Caxton Associates LLP, Citadel Advisors LLC, D. E. Shaw & Co., GAMCO Investors Inc, Holocene Advisors LP, Hudson Bay Capital Management LP, Jane Street Group LLC, Janus Henderson Group Ltd, Man Group PLC, Marshall Wace LLP, MFS Investment Management, Millennium Management LLC, Moore Capital Management LP, Neuberger Berman Group LLC, PDT Partners LLC, Polen Capital Management LLC, Quantbot Technologies LP, Renaissance Technologies LLC, Schonfeld Strategic Advisors LLC, and 6 more

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. Buyers and sellers count comparable managers (those that filed both quarters) by shares, so a rise in value with no rise in shares is the price. Large books are listed to their largest positions. These are 95 tracked managers, not the institutional market.

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