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Ati Inc

ATI
Exchange
NYSE
Industry
Steel Pipe & Tubes
SEC CIK
0001018963

In the last 90 days, Ati Inc insiders filed 0 open-market purchases and 9 sales; 795 institutions reported holding it in 13F filings for Q2 2026, worth $25.1B in total; 3 superinvestors hold it, including Viking Global Investors and Soros Fund Management.

Q4 2025 vs. Q3 2025

How the institutions holding Ati Inc changed between Q3 2025 and Q4 2025.

All holders in Q4 2025All holders in Q3 2025

13F holders of ATI: Q3 2025 compared with Q4 2025
MeasureQ3 2025Of which not filed for Q4 2025Q4 2025Change
Holders4709570+109
Shares128.8M21.0K128.3M−445.7K (−0.3%)
Value$10.5B$1.69M$14.7B+$4.26B (+40.7%)

9 institutions that held it in Q3 2025 haven't filed for Q4 2025 yet. Not filing isn't selling, so the changes leave them out.

New holders (145)

Institutions that held Ati Inc at the end of Q4 2025 but not at the end of Q3 2025.

Showing the largest 100 of 145 by value.

Institutions new to ATI in Q4 2025
InstitutionSharesValue% of portfolio
Norges Bank1,732,195$198.8M0.02%
Qube Research & Technologies Ltd430,227$49.4M0.07%
Balyasny Asset Management LLC389,986$44.8M0.08%
Vaughan Nelson Investment Management, L.P.377,550$43.3M0.42%
Arrowstreet Capital, Limited Partnership363,271$41.7M0.02%
1832 Asset Management L.P.294,473$33.8M0.04%
MUFG Securities EMEA plc277,000$31.8M0.37%
Lord, Abbett & Co. LLC267,049$30.6M0.09%
Natixis264,067$30.3M0.12%
Cartenna Capital, LP260,000$29.8M1.57%
Nomura Asset Management International Inc.239,609$27.5M0.04%
Driehaus Capital Management LLC213,111$24.5M0.17%
CIBC World Markets Corp177,444$20.4M0.10%
Concentric Capital Strategies, LP161,956$18.6M0.96%
Schonfeld Strategic Advisors LLC107,131$12.3M0.06%
Worldquant Millennium Advisors LLC92,167$10.6M0.04%
S Squared Technology, LLC80,000$9.18M3.56%
SummitTX Capital, L.P.68,660$7.88M0.24%
Ieq Capital, LLC65,217$7.48M0.02%
Tribune Investment Group LP57,000$6.54M3.98%
Horizon Investments, LLC55,514$6.37M0.08%
Nordea Investment Management AB52,700$6.11M0.01%
Buckingham Strategic Partners36,196$4.15M0.05%
Boothbay Fund Management, LLC33,729$3.87M0.10%
Rational Advisors LLC33,400$3.83M0.39%
Pier Capital, LLC29,052$3.33M0.53%
Toronto Dominion Bank17,780$2.04M0.00%
ExodusPoint Capital Management, LP17,634$2.02M0.02%
Dockside LLC15,844$1.82M0.47%
PEAK6 LLC15,843$1.82M0.05%
Dayah Capital LLC15,000$1.72M1.16%
Trexquant Investment LP14,551$1.67M0.01%
Empowered Funds, LLC13,834$1.59M0.03%
H Squared Management LP13,800$1.58M1.36%
Havemeyer Place LP13,632$1.56M0.31%
Arete Wealth Advisors, LLC13,236$1.52M0.11%
Old West Investment Management, LLC12,555$1.44M0.26%
Nilsine Partners, LLC11,932$1.37M0.12%
CWM Advisors, LLC11,562$1.33M0.12%
Jump Financial, LLC10,104$1.16M0.01%
Dark Forest Capital Management LP9,542$1.10M0.05%
Walleye Trading LLC9,362$1.07M0.02%
Numerai GP LLC8,426$967.0K0.12%
Qsemble Capital Management, LP8,087$928.1K0.08%
Vestmark Advisory Solutions, Inc.7,740$888.2K0.01%
Captrust Financial Advisors7,576$869.4K0.00%
Greenland Capital Management LP7,500$860.7K0.12%
Colony Group, LLC7,244$831.4K0.00%
Skopos Labs, Inc.6,687$779.9K0.04%
Martingale Asset Management L P6,263$718.7K0.02%
Qtron Investments LLC5,979$686.1K0.09%
Merit Financial Group, LLC5,782$663.5K0.01%
Quantitative Investment Management, LLC5,731$657.0K0.06%
University of Texas/Texas Am Investment Managment Co5,063$581.0K0.08%
North Dakota State Investment Board4,917$564.3K0.02%
Flow Traders U.S. LLC4,837$555.0K0.02%
Eurizon Capital SGR S.p.A.4,767$549.2K0.00%
Callan Family Office, LLC4,555$522.7K0.01%
Counterpoint Mutual Funds LLC4,360$500.4K0.04%
Sheets Smith Wealth Management4,321$495.9K0.05%
Whalen Wealth Management Inc.3,926$450.5K0.24%
Ewing Morris & Co. Investment Partners Ltd.3,800$441.4K0.19%
Krilogy Financial LLC3,472$428.3K0.01%
Group One Trading, L.P.3,651$419.0K0.01%
NorthCrest Asset Manangement, LLC3,240$388.5K0.01%
Picton Mahoney Asset Management3,350$384.4K0.00%
Voleon Capital Management LP3,329$382.0K0.01%
Exchange Traded Concepts, LLC3,296$378.2K0.00%
HB Wealth Management, LLC3,222$369.8K0.00%
CAPROCK Group, Inc.3,125$358.6K0.01%
XTX Topco Ltd3,037$348.5K0.01%
Two Sigma Advisers, LP2,900$332.8K0.00%
Vise Technologies, Inc.2,772$318.1K0.01%
Virtu Financial LLC2,754$316.0K0.01%
Inceptionr LLC2,616$300.2K0.08%
Toth Financial Advisory Corp2,500$286.9K0.03%
Caerus Investment Advisors, LLC2,469$283.3K0.09%
Integrated Wealth Concepts LLC2,468$283.2K0.00%
Savant Capital, LLC2,449$281.0K0.00%
Syon Capital LLC2,446$280.7K0.01%
Souders Financial Advisors2,413$276.9K0.03%
Pensionmark Financial Group, LLC2,376$272.7K0.00%
Perigon Wealth Management, LLC2,290$262.8K0.00%
Abel Hall, LLC2,265$259.9K0.06%
Vinva Investment Management Ltd1,458$252.8K0.00%
Leavell Investment Management, Inc.2,200$252.5K0.01%
Kestra Advisory Services, LLC2,192$251.6K0.00%
Revisor Wealth Management LLC2,048$250.9K0.07%
Successful Portfolios LLC2,000$244.6K0.12%
Vestcor Inc2,122$244.0K0.01%
Sivia Capital Partners, LLC2,091$240.0K0.05%
Howard Wealth Management, LLC2,081$238.8K0.10%
Commerce Bank2,076$238.2K0.00%
Aster Capital Management (DIFC) Ltd2,065$237.0K0.10%
Atomi Financial Group, Inc.2,058$236.2K0.01%
AA Financial Advisors, LLC2,033$233.3K0.04%
NewEdge Wealth, LLC2,023$232.2K0.00%
CIBC World Markets Inc.2,010$230.7K0.00%
Northland Securities, Inc.2,000$229.5K0.22%
Shay Capital LLC2,000$229.5K0.04%

Sold out (36)

Institutions that held Ati Inc at the end of Q3 2025 and filed for Q4 2025 without it.

Institutions that sold out of ATI in Q4 2025
InstitutionShares, Q3 2025Value, Q3 2025
Davidson Kempner Capital Management LP530,000$43.1M
Rokos Capital Management LLP527,256$42.9M
Renaissance Technologies LLC259,992$21.1M
Macquarie Group Ltd236,788$19.3M
Moore Capital Management, LP211,002$17.2M
Tudor Investment Corp Et Al181,797$14.8M
Bridgewater Associates, LP136,458$11.1M
Kinetic Partners Management, LP132,800$10.8M
Bayberry Capital Partners LP124,100$10.1M
Discovery Capital Management, LLC105,100$8.55M
Van Eck Associates Corp50,925$4.14M
Magnetar Financial LLC45,664$3.71M
Cinctive Capital Management LP38,328$3.12M
BI Asset Management Fondsmaeglerselskab A/S34,944$2.84M
IMC-Chicago, LLC22,509$1.83M
First Financial Bankshares Inc19,534$1.59M
CenterBook Partners LP16,858$1.37M
Yaupon Capital Management LP15,844$1.29M
Fund 1 Investments, LLC12,813$1.04M
Friedenthal Financial12,204$992.7K
Y-Intercept (Hong Kong) Ltd10,241$833.0K
Oak Thistle LLC7,325$595.8K
Prelude Capital Management, LLC2,689$218.7K
Optiver Holding B.V.864$70.3K
Ameritas Advisory Services, LLC617$50.2K
Quarry LP472$38.4K
Ci Investments Inc.348$28.0K
Wealthspire Advisors, LLC264$21.5K
Principal Securities, Inc.217$17.7K
Caitong International Asset Management Co., Ltd179$14.6K
Tortoise Investment Management, LLC54$4.39K
NBC Securities, Inc.40$3.25K
Cloud Capital Management, LLC31$2.00K
JPL Wealth Management, LLC19$1.55K
Cornerstone Planning Group LLC1$101
Mather Group, LLC.1$81

Not filed for Q4 2025 yet (9)

Institutions that held Ati Inc at the end of Q3 2025 and haven't filed a 13F for Q4 2025. Not filing isn't selling, so they aren't counted as sold out.

Institutions holding ATI in Q3 2025 that haven't filed for Q4 2025
InstitutionShares, Q3 2025Value, Q3 2025
Wolverine Trading, LLC5,731$454.2K
Point72 Asia (Singapore) Pte. Ltd.5,571$453.1K
Point72 Europe (London) LLP2,794$227.2K
IMS Capital Management2,500$203.3K
Shell Asset Management Co1,647$134.0K
Point72 Hong Kong Ltd1,491$121.3K
WFA Asset Management Corp800$53.5K
Hemington Wealth Management482$39.0K
Guerra Advisors Inc10$813