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ATI · 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.

ATIHWM
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.
  • ATI
  • HWM
010203040202120222023202420252026
Holders and value by quarter
QuarterATIHWM
Q3 20207 holders, $85m12 holders, $1.6bn
Q4 20207 holders, $167m21 holders, $3.0bn
Q1 20217 holders, $218m18 holders, $3.2bn
Q2 20216 holders, $171m19 holders, $3.8bn
Q3 20218 holders, $143m18 holders, $3.4bn
Q4 20217 holders, $113m15 holders, $3.7bn
Q1 20228 holders, $266m12 holders, $3.6bn
Q2 20228 holders, $399m15 holders, $3.2bn
Q3 202212 holders, $433m20 holders, $3.1bn
Q4 202211 holders, $451m19 holders, $4.4bn
Q1 202310 holders, $436m23 holders, $4.7bn
Q2 202312 holders, $504m25 holders, $5.2bn
Q3 202311 holders, $409m26 holders, $4.3bn
Q4 202312 holders, $567m22 holders, $5.0bn
Q1 202411 holders, $598m22 holders, $6.1bn
Q2 202419 holders, $903m23 holders, $7.1bn
Q3 202423 holders, $1.8bn25 holders, $8.7bn
Q4 202416 holders, $735m21 holders, $9.0bn
Q1 202521 holders, $852m23 holders, $10.0bn
Q2 202519 holders, $2.0bn22 holders, $13.2bn
Q3 202518 holders, $1.7bn23 holders, $13.4bn
Q4 202519 holders, $3.1bn26 holders, $13.6bn
Q1 202627 holders, $5.4bn35 holders, $15.6bn
Q2 202633 holders, $6.4bn37 holders, $17.3bn
ATI

Allegheny Technologies Inc

Holders
27
Reported value
$5.4bn
Buyers
27
Sellers
15

Breadth +12 among 91 comparable managers.

Materials
HWM

Howmet Aerospace Inc

Holders
35
Reported value
$15.6bn
Buyers
24
Sellers
16

Breadth +8 among 91 comparable managers.

Materials

Who holds both, Q1 2026

Among the 45 tracked managers listing any of them. "Only" is about listed positions: a manager may hold the other below its listed range.

Only ATI (10)

ARK Investment Management LLC, Arrowstreet Capital LP, Capital World Investors, D. E. Shaw & Co., ExodusPoint Capital Management LP, Moore Capital Management LP, Point72 Asset Management LP, Rokos Capital Management LLP, Soros Fund Management LLC, Viking Global Investors LP

Only HWM (18)

Acadian Asset Management LLC, AllianceBernstein LP, Artisan Partners LP, Bridgewater Associates LP, Caxton Associates LLP, Citadel Advisors LLC, Janus Henderson Group Ltd, Man Group PLC, MFS Investment Management, PDT Partners LLC, Renaissance Technologies LLC, Squarepoint Ops LLC, T. Rowe Price Associates Inc, Tudor Investment Corp, Two Sigma Investments LP, Verition Fund Management LLC, Voloridge Investment Management LLC, Wellington Management Group LLP

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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