Company · Ownership research

ATI INC ATI

CIK 0001018963 · CUSIP 01741R102

Insider trading Initial holdings Institutional holders

Quarter-end disclosures, not live holdings.

Several CUSIPs are reported for this company; this page shows CUSIP 01741R102 (ATI), not CUSIP 01741R902 (ATI), CUSIP 01741R952 (ATI), and does not merge CUSIPs.

This page lists the top 20 of 400 rows by value; the complete set is available through the API.

Some filings reported values in thousands; those figures were scaled ×1,000 to dollars.

Top 20 institutions

Weight means this stock's share of the manager's own portfolio.

By reported value

#	Manager	Value	Manager weight	Change vs prior	Source
01	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$513.27M 2,717,163 shares	0.03%	-60.35K(-2.20%)Reduced	SEC filing ↗ Nov 6, 2026	▾
02	DIMENSIONAL FUND ADVISORS LP CIK 354204 · View history	$216.25M 1,141,781 shares	0.04%	-18.49K(-1.60%)Reduced	SEC filing ↗ Nov 4, 2026	▾
03	Fisher Asset Management, LLC CIK 850529 · View history	$172.36M 910,047 shares	0.05%	+37.67K(+4.30%)Added	SEC filing ↗ Nov 6, 2026	▾
04	Bank of New York Mellon Corp CIK 1390777 · View history	$169.10M 892,816 shares	0.03%	+35.40K(+4.10%)Added	SEC filing ↗ Nov 5, 2026	▾
05	Allspring Global Investments Holdings, LLC CIK 1890906 · View history	$164.60M 861,151 shares	0.26%	+359.11K(+71.50%)Added	SEC filing ↗ Nov 4, 2026	▾
06	Artemis Investment Management LLP CIK 1535385 · View history	$161.83M 854,431 shares	1.41%	+12.94K(+1.50%)Added	SEC filing ↗ Oct 8, 2026	▾
07	Assenagon Asset Management S.A. CIK 1546007 · View history	$158.71M 837,941 shares	0.16%	+180.82K(+27.50%)Added	SEC filing ↗ Oct 15, 2026	▾
08	Amundi CIK 1330387 · View history	$118.85M 627,530 shares	0.02%	+238.91K(+61.50%)Added	SEC filing ↗ Nov 6, 2026	▾
09	DEUTSCHE BANK AG\ CIK 948046 · View history	$85.86M 453,309 shares	0.02%	+290.72K(+178.80%)Added	SEC filing ↗ Nov 6, 2026	▾
10	PRINCIPAL FINANCIAL GROUP INC CIK 1126328 · View history	$64.81M 342,186 shares	0.03%	+33.81K(+11.00%)Added	SEC filing ↗ Nov 2, 2026	▾
11	BARCLAYS PLC CIK 312069 · View history	$58.47M 308,686 shares	0.02%	+168.91K(+120.80%)Added	SEC filing ↗ Nov 6, 2026	▾
12	DekaBank Deutsche Girozentrale CIK 1456228 · View history	$56.49M 298,605 shares	0.06%	+298.61KNew	SEC filing ↗ Oct 27, 2026	▾
13	Retirement Systems of Alabama CIK 1593051 · View history	$54.20M 286,176 shares	0.16%	-698(-0.20%)Reduced	SEC filing ↗ Nov 4, 2026	▾
14	Sumitomo Mitsui Trust Group, Inc. CIK 1475365 · View history	$47.75M 252,093 shares	0.03%	+252.09KNew	SEC filing ↗ Oct 29, 2026	▾
15	CITIGROUP INC CIK 831001 · View history	$44.59M 235,433 shares	0.02%	+43.26K(+22.50%)Added	SEC filing ↗ Nov 4, 2026	▾
16	Thrivent Financial for Lutherans CIK 314984 · View history	$40.52M 213,940 shares	0.07%	-124.70K(-36.80%)Reduced	SEC filing ↗ Nov 5, 2026	▾
17	LPL Financial LLC CIK 1403438 · View history	$40.03M 211,372 shares	0.01%	+5.59K(+2.70%)Added	SEC filing ↗ Nov 6, 2026	▾
18	Mitsubishi UFJ Asset Management Co., Ltd. CIK 1466546 · View history	$31.94M 168,625 shares	0.02%	+168.26K(+45,597.80%)Added	SEC filing ↗ Nov 5, 2026	▾
19	Fiera Capital Corp CIK 1505817 · View history	$28.88M 152,482 shares	0.11%	+152.48KNew	SEC filing ↗ Nov 6, 2026	▾
20	Russell Investments Group, Ltd. CIK 1692234 · View history	$24.86M 131,250 shares	0.02%	+70.68K(+116.70%)Added	SEC filing ↗ Nov 6, 2026	▾

Showing 20 / 400 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

400

Cancelled or null records excluded

Disclosed shares

15,355,771

Not deduplicated across managers

Disclosed value

$2.91B

Not market cap or free float

Reporting institutions by quarter

Counts also change with data coverage and reporting entities; they do not measure net buying. Distinct managers with a live stock row in this CUSIP; totals may include overlapping filings and are not a share of the company.

ATI INC · Q3 2026

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Sources, coverage & how to read this data

Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.