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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
30 Jun 2025
the date the book describes
Filed
27 Oct 2026
latest of these filings; the earliest 30 Jul 2025
Managers listing it
19
at least, of 95 tracked, among listed positions
Comparable managers
95
filed both Q1 2025 and Q2 2025; 15 listed it in both
Shares listed
23,221,786
combined, among listed positions
Reported value
$2.0bn
combined, at the quarter end

Among the 95 comparable managers: 6 buyers (opened or added shares) and 14 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 Q2 2025

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q1 2025, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

19 of 19 holders

ActionFiling
Capital World Investors6,820,371$589m0.09%Trimmed-161,80313 Aug 2025 (the filing on sec.gov)
D. E. Shaw & Co.3,513,948$303m0.22%Added+1,874,65414 Aug 2025 (the filing on sec.gov)
Invesco Ltd3,296,624$285munder 0.1%Trimmedn.a.13 Aug 2025 (the filing on sec.gov)
Capital Research Global Investors3,224,970$278m0.06%Added+2,622,01113 Aug 2025 (the filing on sec.gov)
Woodline Partners LP838,621$72m0.38%Trimmed-105,59514 Aug 2025 (the filing on sec.gov)
Voloridge Investment Management LLC822,696$71m0.26%Newnew14 Aug 2025 (the filing on sec.gov)
Point72 Asset Management LP786,259$68m0.13%Trimmed-242,40114 Aug 2025 (the filing on sec.gov)
Neuberger Berman Group LLC778,482$67m0.05%Trimmed-353,81427 Oct 2026 (the filing on sec.gov)
Holocene Advisors LP604,781$52m0.13%Newnew14 Aug 2025 (the filing on sec.gov)
Tudor Investment Corp591,342$51m0.11%Added+363,07014 Aug 2025 (the filing on sec.gov)
Renaissance Technologies LLC481,692$42m0.06%Addedn.a.13 Aug 2025 (the filing on sec.gov)
GAMCO Investors Inc400,800$35m0.34%Trimmed-90013 Aug 2025 (the filing on sec.gov)
Soros Fund Management LLC362,695$31m0.39%Trimmed-251,18914 Aug 2025 (the filing on sec.gov)
Hudson Bay Capital Management LP206,803$18m0.06%Trimmed-65,34218 Aug 2025 (the filing on sec.gov)
Moore Capital Management LP162,965$14m0.18%Trimmed-23,88414 Aug 2025 (the filing on sec.gov)
Schonfeld Strategic Advisors LLC137,409$12m0.08%Trimmed-86,77314 Aug 2025 (the filing on sec.gov)
Davidson Kempner Capital Management LP130,000$11m0.16%Trimmed-45,00014 Aug 2025 (the filing on sec.gov)
PDT Partners LLC61,173$5.3m0.30%Trimmed-37,18914 Aug 2025 (the filing on sec.gov)
ARK Investment Management LLC155$13kunder 0.1%Trimmed-1,39030 Jul 2025 (the filing on sec.gov)

Largest increases and reductions, by shares

Q1 2025 to Q2 2025, 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 (2)

Exited (1)

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 →