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ATI · Ati Inc · Shareholders & Ownership

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$183.07 -6.21 (-3.28%)
Market Cap
$24.82B
Shares
136.17M
Volume · Oct 20 1.28M Avg daily vol (3M) 1.62M

Every disclosed holder of ATI in one list: 13F institutions, Schedule 13D and 13G filers, insiders (Forms 3, 4 and 5) and registered funds, each from its own latest filing. Holders nest by CIK and SEC reporting links, never by name, and each is summed once.

Who Owns ATI

13F quarter Sep 30, 2026, combined view: filers that have not filed yet carry their Jun 30, 2026 positions
Holder group Shares % Out
Institutional (13F) 127,879,482 93.91%
Insiders (Forms 3, 4, 5) 1,233,361 0.91%
13D/G-only blocks 0 0.00%
Remaining 7,057,540 5.18%
Registered funds (N-PORT, not summed) 64,923,433 47.68%

Shares outstanding: 136,170,383, the issuer's latest cover-page count restated onto today's split basis.

13D/G-only counts each filer's latest 13D or 13G that no 13F report of the listing contains, that names no 13F filer and that no counted insider files. Funds are never summed: their shares sit inside their advisers' 13F reports.

Holders of ATI

# Holder Shares
1
BlackRock, Inc.
13F CIK 2012383 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
18,708,922
1.1
iShares Core S&P Mid-Cap ETF
Fund S000004307 · Registered fund · Jun 30, 2026
iShares Trust, not summed
4,670,260
1.2
iShares U.S. Aerospace & Defense ETF
Fund S000009423 · Registered fund · Jun 30, 2026
iShares Trust, not summed
1,382,689
1.3
iShares Large Cap Core Active ETF
Fund S000082317 · Registered fund · Jul 31, 2026
BlackRock ETF Trust, not summed
1,197,337
1.4
iShares S&P Mid-Cap 400 Growth ETF
Fund S000004308 · Registered fund · Jun 30, 2026
iShares Trust, not summed
816,427
1.5
iShares Russell Mid-Cap Growth ETF
Fund S000004336 · Registered fund · Jun 30, 2026
iShares Trust, not summed
798,471
2
VANGUARD PORTFOLIO MANAGEMENT LLC
13F CIK 2100121 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
6,219,875
3
VANGUARD CAPITAL MANAGEMENT LLC
13F CIK 2100119 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
6,162,418
4
Capital World Investors
13F CIK 1422849 · Investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
5,249,249
5
STATE STREET CORP
13F CIK 93751 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
5,237,299
5.1
State Street(R) SPDR(R) S&P(R) Aerospace & Defense ETF
Fund S000012318 · Registered fund · Jun 30, 2026
SPDR SERIES TRUST, not summed
908,061
5.2
State Street(R) SPDR(R) Portfolio S&P 400(TM) Mid Cap ETF
Fund S000006986 · Registered fund · Jun 30, 2026
SPDR SERIES TRUST, not summed
690,782
5.3
State Street(R) SPDR(R) S & P 400(TM) Mid Cap Growth ETF
Fund S000006987 · Registered fund · Jun 30, 2026
SPDR SERIES TRUST, not summed
211,044
5.4
State Street(R) SPDR(R) S&P Kensho New Economies Composite ETF
Fund S000063362 · Registered fund · Jun 30, 2026
SPDR SERIES TRUST, not summed
47,969
5.5
STATE STREET SMALL/MID CAP EQUITY INDEX PORTFOLIO
Fund S000050332 · Registered fund · Jun 30, 2026
STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed
47,237
6
Capital Research Global Investors
13F CIK 1422848 · Investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
5,093,768
7
FMR LLC
13F CIK 315066 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
4,989,171
7.1
Strategic Advisers Fidelity U.S. Total Stock Fund
Fund S000061481 · Registered fund · May 31, 2026
Fidelity Rutland Square Trust II, not summed
898,999
7.2
Fidelity Extended Market Index Fund
Fund S000006021 · Registered fund · May 31, 2026
Fidelity Concord Street Trust, not summed
701,095
7.3
VIP Mid Cap Portfolio
Fund S000007734 · Registered fund · Jun 30, 2026
Variable Insurance Products Fund III, not summed
602,900
7.4
Fidelity Mid Cap Index Fund
Fund S000033637 · Registered fund · Jul 31, 2026
Fidelity Salem Street Trust, not summed
512,813
7.5
Select Defense and Aerospace Portfolio
Fund S000007456 · Registered fund · May 31, 2026
Fidelity Select Portfolios, not summed
487,500
8
VANGUARD TOTAL STOCK MARKET INDEX FUND
Fund S000002848 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
4,331,882
9
SMALLCAP World Fund Inc
Fund S000009599 · Registered fund · Jun 30, 2026
SMALLCAP World Fund Inc, not summed
4,210,910
10
Capital International Investors
13F CIK 1562230 · Investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
3,719,485
11
Invesco Ltd.
13F CIK 914208 · Investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
3,449,291
11.1
Invesco S&P MidCap Momentum ETF
Fund S000003056 · Registered fund · Jul 31, 2026
Invesco Exchange-Traded Fund Trust, not summed
1,314,662
11.2
Invesco Aerospace & Defense ETF
Fund S000003039 · Registered fund · Jul 31, 2026
Invesco Exchange-Traded Fund Trust, not summed
687,723
11.3
Invesco Discovery Fund
Fund S000064618 · Registered fund · May 31, 2026
AIM Counselor Series Trust (Invesco Counselor Series Trust), not summed
542,814
11.4
Invesco Main Street Mid Cap Fund
Fund S000064651 · Registered fund · Jun 30, 2026
AIM Growth Series (Invesco Growth Series), not summed
207,622
11.5
Invesco Dorsey Wright Momentum ETF
Fund S000013787 · Registered fund · Jul 31, 2026
Invesco Exchange-Traded Fund Trust, not summed
169,918
12
VANGUARD SMALL-CAP INDEX FUND
Fund S000002845 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
3,129,836
13
GEODE CAPITAL MANAGEMENT, LLC
13F CIK 1214717 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
2,777,512
14
Qube Research & Technologies Ltd
13F CIK 1729829 · Exempt reporting adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
2,144,028
15
MORGAN STANLEY
13F CIK 895421 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
1,865,178
15.1
E*TRADE No Fee Total Market Index Fund
Fund S000090722 · Registered fund · Jul 31, 2026
E Trade Trust, not summed
198
16
VANGUARD SMALL-CAP GROWTH INDEX FUND
Fund S000002846 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
1,804,092
17
BANK OF AMERICA CORP /DE/
13F CIK 70858 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
1,767,047
18
NORGES BANK
13F CIK 1374170 · Non-US institution · Jun 30, 2026
carried, not yet filed for the newest quarter
1,739,884
19
Asset Allocation Fund
Fund S000008796 · Registered fund · Jun 30, 2026
AMERICAN FUNDS INSURANCE SERIES, not summed
1,712,904
20
Growth Fund of America
Fund S000009228 · Registered fund · May 31, 2026
Growth Fund of America, not summed
1,663,011
21
American Balanced Fund
Fund S000008801 · Registered fund · Jun 30, 2026
American Balanced Fund, not summed
1,580,852
22
VANGUARD EXTENDED MARKET INDEX FUND
Fund S000002841 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
1,564,730
23
CHARLES SCHWAB INVESTMENT MANAGEMENT INC
13F CIK 884546 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
1,483,253
23.1
Schwab U.S. Small-Cap ETF
Fund S000026636 · Registered fund · May 31, 2026
SCHWAB STRATEGIC TRUST, not summed
653,092
23.2
Schwab U.S. Mid-Cap ETF
Fund S000026635 · Registered fund · May 31, 2026
SCHWAB STRATEGIC TRUST, not summed
367,384
23.3
Schwab Fundamental U.S. Small Company ETF
Fund S000040878 · Registered fund · May 31, 2026
SCHWAB STRATEGIC TRUST, not summed
147,962
23.4
Schwab Total Stock Market Index Fund
Fund S000005913 · Registered fund · Jul 31, 2026
SCHWAB CAPITAL TRUST, not summed
83,142
23.5
Schwab U.S. Broad Market ETF
Fund S000026631 · Registered fund · May 31, 2026
SCHWAB STRATEGIC TRUST, not summed
80,559
24
AQR CAPITAL MANAGEMENT LLC
13F CIK 1167557 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
1,432,935
24.1
AQR Long-Short Equity Fund
Fund S000041116 · Registered fund · Jun 30, 2026
AQR Funds, not summed
72,697
24.2
AQR Equity Market Neutral Fund
Fund S000046740 · Registered fund · Jun 30, 2026
AQR Funds, not summed
29,839
24.3
AQR Managed Futures Strategy Fund
Fund S000027214 · Registered fund · Jun 30, 2026
AQR Funds, not summed
26,102
24.4
AQR Style Premia Alternative Fund
Fund S000042050 · Registered fund · Jun 30, 2026
AQR Funds, not summed
22,981
24.5
AQR Managed Futures Strategy HV Fund
Fund S000041117 · Registered fund · Jun 30, 2026
AQR Funds, not summed
17,510
25
JANE STREET GROUP, LLC
13F CIK 1595888 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
1,410,930
26
NORTHERN TRUST CORP
13F CIK 73124 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
1,288,597
26.1
Mid Cap Index Fund
Fund S000001273 · Registered fund · Jun 30, 2026
Northern Funds, not summed
88,707
26.2
U.S. Quality ESG Fund
Fund S000055816 · Registered fund · Jun 30, 2026
Northern Funds, not summed
4,637
26.3
FlexShares Morningstar US Market Factor Tilt Index Fund
Fund S000033312 · Registered fund · Jul 31, 2026
FlexShares Trust, not summed
3,318
27
Point72 Asset Management, L.P.
13F CIK 1603466 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
1,240,348
28
DIMENSIONAL FUND ADVISORS LP
13F CIK 354204 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
1,160,274
28.1
Dimensional U.S. Core Equity 2 ETF
Fund S000070903 · Registered fund · Jul 31, 2026
Dimensional ETF Trust, not summed
259,481
28.2
U.S. CORE EQUITY 2 PORTFOLIO
Fund S000000980 · Registered fund · Jul 31, 2026
DFA INVESTMENT DIMENSIONS GROUP INC, not summed
225,110
28.3
U.S. CORE EQUITY 1 PORTFOLIO
Fund S000000979 · Registered fund · Jul 31, 2026
DFA INVESTMENT DIMENSIONS GROUP INC, not summed
185,772
28.4
Dimensional U.S. Equity Market ETF
Fund S000070902 · Registered fund · Jul 31, 2026
Dimensional ETF Trust, not summed
41,580
28.5
Dimensional US Core Equity Market ETF
Fund S000069432 · Registered fund · Jul 31, 2026
Dimensional ETF Trust, not summed
26,448
29
VIKING GLOBAL INVESTORS LP
13F CIK 1103804 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
1,153,880
30
AMCAP Fund
Fund S000008817 · Registered fund · May 31, 2026
AMCAP Fund, not summed
1,137,102
31
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.
13F CIK 1705339 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
1,120,952
31.1
Global X U.S. Infrastructure Development ETF
Fund S000056509 · Registered fund · May 31, 2026
GLOBAL X FUNDS, not summed
996,615
31.2
Global X Autonomous & Electric Vehicles ETF
Fund S000061415 · Registered fund · May 31, 2026
GLOBAL X FUNDS, not summed
35,333
32
BOWEN HANES & CO INC
13F CIK 1077583 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
1,043,105
33
PRICE T ROWE ASSOCIATES INC /MD/
13F CIK 80255 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
1,021,799
33.1
T. Rowe Price Diversified Mid-Cap Growth Fund, Inc.
Fund S000002073 · Registered fund · Jun 30, 2026
T. ROWE PRICE DIVERSIFIED MID-CAP GROWTH FUND, INC., not summed
170,400
33.2
T. Rowe Price Integrated U.S. Small-Cap Growth Equity Fund
Fund S000002074 · Registered fund · Jun 30, 2026
T. ROWE PRICE INTEGRATED EQUITY FUNDS, INC., not summed
97,937
33.3
T. Rowe Price Extended Equity Market Index Fund
Fund S000002090 · Registered fund · Jun 30, 2026
T. ROWE PRICE INDEX TRUST, INC., not summed
18,315
33.4
T. Rowe Price Mid-Cap Index Fund
Fund S000051326 · Registered fund · Jun 30, 2026
T. ROWE PRICE INDEX TRUST, INC., not summed
11,998
33.5
T. Rowe Price Integrated U.S. Small-Mid Cap Core Equity Fund
Fund S000052904 · Registered fund · Jun 30, 2026
T. ROWE PRICE INTEGRATED EQUITY FUNDS, INC., not summed
9,800
34
DENDUR CAPITAL LP
13F CIK 1782124 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
1,009,000
35
BESSEMER GROUP INC
13F CIK 1054074 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
954,983
35.1
Old Westbury Large Cap Strategies Fund
Fund S000001858 · Registered fund · Jul 31, 2026
Old Westbury Funds Inc, not summed
417,047
35.2
Old Westbury Small & Mid Cap Strategies Fund
Fund S000001857 · Registered fund · Jul 31, 2026
Old Westbury Funds Inc, not summed
76,531
35.3
Old Westbury All Cap Core Fund
Fund S000001859 · Registered fund · Jul 31, 2026
Old Westbury Funds Inc, not summed
44,434
35.4
Old Westbury Total Equity Fund
Fund S000090405 · Registered fund · Jul 31, 2026
Old Westbury Funds Inc, not summed
16,551
36
BNP PARIBAS ARBITRAGE, SA
13F CIK 1166588 · Non-US institution · Jun 30, 2026
carried, not yet filed for the newest quarter
922,903
37
VANGUARD FIDUCIARY TRUST CO
13F CIK 933478 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
881,293
38
MILLENNIUM MANAGEMENT LLC
13F CIK 1273087 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
875,260
39
Fisher Asset Management, LLC
13F CIK 850529 · Investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
872,372
40
AMERIPRISE FINANCIAL INC
13F CIK 820027 · Investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
858,201
40.1
Columbia Select Mid Cap Value Fund
Fund S000010792 · Registered fund · May 31, 2026
COLUMBIA FUNDS SERIES TRUST, not summed
350,699
40.2
Columbia Mid Cap Index Fund
Fund S000010826 · Registered fund · May 31, 2026
COLUMBIA FUNDS SERIES TRUST, not summed
97,043
40.3
Columbia Select Small Cap Value Fund
Fund S000031375 · Registered fund · May 31, 2026
Columbia Funds Series Trust II, not summed
58,661
40.4
Columbia Variable Portfolio - Select Mid Cap Value Fund
Fund S000019847 · Registered fund · Jun 30, 2026
Columbia Funds Variable Series Trust II, not summed
33,992
40.5
Multi-Manager Value Strategies Fund
Fund S000036208 · Registered fund · May 31, 2026
Columbia Funds Series Trust II, not summed
30,581
41
Bank of New York Mellon Corp
13F CIK 1390777 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
857,414
41.1
BNY Mellon US Mid Cap Core Equity ETF
Fund S000067261 · Registered fund · Jul 31, 2026
BNY Mellon ETF Trust, not summed
21,732
42
Artemis Investment Management LLP
13F CIK 1535385 · Non-US institution · Sep 30, 2026
854,431
43
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP
13F CIK 1164508 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
839,786
44
Assenagon Asset Management S.A.
13F CIK 1546007 · Unknown · Sep 30, 2026
837,941
45
POLEN CAPITAL MANAGEMENT LLC
13F CIK 1034524 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
819,236
45.1
Polen Growth Fund
Fund S000029264 · Registered fund · Jul 31, 2026
FundVantage Trust, not summed
148,992
45.2
Polen Focus Growth ETF
Fund S000093102 · Registered fund · Jul 31, 2026
FundVantage Trust, not summed
6,926
46
D. E. Shaw & Co., Inc.
13F CIK 1009207 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
815,585
47
VANGUARD EXPLORER FUND
Fund S000002578 · Registered fund · Jul 31, 2026
VANGUARD EXPLORER FUND, not summed
779,256
48
AMERICAN CENTURY COMPANIES INC
13F CIK 748054 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
765,808
48.1
Global Small Cap Fund
Fund S000053103 · Registered fund · May 31, 2026
American Century World Mutual Funds, Inc., not summed
6,287
49
GOLDMAN SACHS GROUP INC
13F CIK 886982 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
751,276
49.1
Goldman Sachs ActiveBeta(R) U.S. Large Cap Equity ETF
Fund S000048295 · Registered fund · May 31, 2026
Goldman Sachs ETF Trust, not summed
45,863
49.2
Goldman Sachs Equal Weight U.S. Large Cap Equity ETF
Fund S000058070 · Registered fund · May 31, 2026
Goldman Sachs ETF Trust, not summed
21,296
49.3
Goldman Sachs Small/Mid Cap Equity Fund
Fund S000044015 · Registered fund · May 31, 2026
Goldman Sachs Trust, not summed
13,472
49.4
Goldman Sachs MarketBeta U.S. 1000 Equity ETF
Fund S000075322 · Registered fund · May 31, 2026
Goldman Sachs ETF Trust II, not summed
4,588
49.5
Goldman Sachs Absolute Return Tracker Fund
Fund S000020314 · Registered fund · Jun 30, 2026
GOLDMAN SACHS TRUST, not summed
4,205
50
Nuveen, LLC
13F CIK 1871926 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
737,096
50.1
College Retirement Equities Fund - Total Global Stock Account
Fund S000005080 · Registered fund · Jun 30, 2026
College Retirement Equities Fund, not summed
179,338
50.2
Nuveen Quant Small/Mid Cap Equity Fund
Fund S000054623 · Registered fund · Jul 31, 2026
TIAA-CREF Funds, not summed
127,624
50.3
Nuveen Equity Index Fund
Fund S000005360 · Registered fund · Jul 31, 2026
TIAA-CREF Funds, not summed
113,171
50.4
Nuveen ESG Small-Cap ETF
Fund S000055815 · Registered fund · Jul 31, 2026
NuShares ETF Trust, not summed
86,943
50.5
Nuveen Quant Mid Cap Growth Fund
Fund S000005384 · Registered fund · Jul 31, 2026
TIAA-CREF Funds, not summed
76,820

119 more nested rows are not shown here; Every filing lists them all.

Shares are restated onto today's split basis. Change compares each row with the same holder's previous filing in the same source; a dash means there is none to compare. Nested 13D/G, insider and fund rows are not summed, since a 13F report already holds them.

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Key facts CIK 1018963 CUSIP 01741R102 13F (30d) 119 filings 116 filers Visit website Investor relations