L3VLUP
ProSign in

ATI in the 13F filings

Allegheny Technologies Inc · CUSIP 01741R102

Sector · Materials
Quarter
Q2 2026Q1 2026Q4 2025Q3 2025Q2 2025Q1 2025Q4 2024Q3 2024Q2 2024Q1 2024Q4 2023Q3 2023
Quarter end
31 Dec 2024
the date the book describes
Filed
14 Feb 2025
latest of these filings; the earliest 4 Feb 2025
Managers listing it
16
at least, of 95 tracked, among listed positions
Comparable managers
94
filed both Q3 2024 and Q4 2024; 13 listed it in both
Shares listed
13,347,171
combined, among listed positions
Reported value
$735m
combined, at the quarter end

Among the 94 comparable managers: 10 buyers (opened or added shares) and 8 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 ATI in Q4 2024

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q3 2024, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

16 of 16 holders

ActionFiling
Capital World Investors6,875,576$378m0.06%Added+3,446,91913 Feb 2025 (the filing on sec.gov)
D. E. Shaw & Co.1,463,613$81m0.06%Added+181,27214 Feb 2025 (the filing on sec.gov)
Woodline Partners LP991,741$55m0.37%Added+564,30814 Feb 2025 (the filing on sec.gov)
Neuberger Berman Group LLC835,662$46munder 0.1%Trimmed-92,36213 Feb 2025 (the filing on sec.gov)
Point72 Asset Management LP797,814$44m0.10%Added+226,13814 Feb 2025 (the filing on sec.gov)
Marshall Wace LLP699,071$38munder 0.1%Trimmed-123,10513 Feb 2025 (the filing on sec.gov)
GAMCO Investors Inc405,700$22m0.23%Trimmed-3,34213 Feb 2025 (the filing on sec.gov)
Soros Fund Management LLC391,501$22m0.32%Added+194,04514 Feb 2025 (the filing on sec.gov)
Holocene Advisors LP353,502$19m0.06%Added+70,61214 Feb 2025 (the filing on sec.gov)
Hudson Bay Capital Management LP201,613$11munder 0.1%Newnew14 Feb 2025 (the filing on sec.gov)
PDT Partners LLC85,262$4.7m0.42%Trimmed-1,21314 Feb 2025 (the filing on sec.gov)
Bridgewater Associates LP76,732$4.2munder 0.1%Newnew13 Feb 2025 (the filing on sec.gov)
Moore Capital Management LP59,817$3.3munder 0.1%Newnew14 Feb 2025 (the filing on sec.gov)
Brevan Howard Capital Management LP57,226$3.1munder 0.1%Added+11,90714 Feb 2025 (the filing on sec.gov)
Winton Group Ltd50,916$2.8m0.19%Trimmed-65,55312 Feb 2025 (the filing on sec.gov)
ARK Investment Management LLC1,425$78kunder 0.1%Trimmed-2474 Feb 2025 (the filing on sec.gov)

Largest increases and reductions, by shares

Q3 2024 to Q4 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 (3)

Exited (2)

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.
23 in Q3 2024 to 33 in Q2 2026

Tracked managers listing it, at least.

0102030402014201620182020202220242026
the quarter shown share split complete books; unmarked quarters rest on listed positionsClick a quarter to open it.
ATI by quarter
QuarterHoldersReported valueBuyersSellers
Q2 20132$96mn.a.n.a.
Q3 20131$98mn.a.n.a.
Q4 20132$239mn.a.n.a.
Q1 20144$272mn.a.n.a.
Q2 20142$272mn.a.n.a.
Q3 20143$31mn.a.n.a.
Q4 20143$38mn.a.n.a.
Q1 20151$223kn.a.n.a.
Q3 20152$821kn.a.n.a.
Q4 20152$28mn.a.n.a.
Q1 20163$34mn.a.n.a.
Q3 20161$934kn.a.n.a.
Q4 20163$23mn.a.n.a.
Q1 20175$56mn.a.n.a.
Q2 20177$103mn.a.n.a.
Q3 20179$188mn.a.n.a.
Q4 20179$212mn.a.n.a.
Q1 20189$249mn.a.n.a.
Q2 201810$319mn.a.n.a.
Q3 20189$340mn.a.n.a.
Q4 20187$311mn.a.n.a.
Q1 20198$403mn.a.n.a.
Q2 201910$426mn.a.n.a.
Q3 201911$339mn.a.n.a.
Q4 20199$350mn.a.n.a.
Q1 20208$82mn.a.n.a.
Q2 20208$92mn.a.n.a.
Q3 20207$85mn.a.n.a.
Q4 20207$167mn.a.n.a.
Q1 20217$218mn.a.n.a.
Q2 20216$171mn.a.n.a.
Q3 20218$143mn.a.n.a.
Q4 20217$113mn.a.n.a.
Q1 20228$266mn.a.n.a.
Q2 20228$399mn.a.n.a.
Q3 202212$433mn.a.n.a.
Q4 202211$451mn.a.n.a.
Q1 202310$436mn.a.n.a.
Q2 202312$504mn.a.n.a.
Q3 202311$409mn.a.n.a.
Q4 202312$567m75
Q1 202411$598m75
Q2 202419$903m154
Q3 202423$1.8bn1410
Q4 202416$735m108
Q1 202521$852m174
Q2 202519$2.0bn614
Q3 202518$1.7bn118
Q4 202519$3.1bn2122
Q1 202627$5.4bn2715
Q2 202633$6.4bn2221

Compare with…

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

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

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 ATI, latest filings →Back to the 13F Explorer →