Ati Inc

ATI

Exchange: NYSE
Industry: Steel Pipe & Tubes
SEC CIK: 0001018963

SEC filings (opens in a new tab)

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.

13F holders, Q3 2026

Institutional positions in Ati Inc as of Sep 30, 2026. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works

Q3 2026 data is still coming in (13F filing deadline: Nov 16, 2026), so these numbers are incomplete.

Institutional holders: 4; 0 vs. Q2 2026
Shares held: 3.25K; +62 (+1.9%) vs. Q2 2026
Total value: $615.5K; −$12.7K (−2.0%) vs. Q2 2026
New holders: 0; 1 more added
Sold out: 0; 1 more reduced

791 institutions that held it in Q2 2026 haven't filed for Q3 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.

Compare with Q2 2026: new holders, sold out and not filed yet

Holders and value by quarter

Institutions reporting ATI on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.

Institutional holders

Value held

Institutions holding ATI and their total value by quarter
Quarter	Holders	Value
Q2 2026	795	$25.1B
Q1 2026	678	$18.5B
Q4 2025	570	$14.7B
Q3 2025	470	$10.5B
Q2 2025	473	$11.6B
Q1 2025	426	$6.97B
Q4 2024	403	$7.51B
Q3 2024	421	$8.89B
Q2 2024	403	$7.33B
Q1 2024	345	$6.89B
Q4 2023	349	$6.10B
Q3 2023	338	$5.48B
Q2 2023	329	$5.95B
Q1 2023	339	$5.29B
Q4 2022	304	$3.95B
Q3 2022	290	$3.49B
Q2 2022	266	$3.02B
Q1 2022	284	$3.51B
Q4 2021	241	$2.10B
Q3 2021	236	$2.21B
Q2 2021	237	$2.77B
Q1 2021	234	$2.72B

Institutions, Q3 2026

Shares, value and share of portfolio for each institution holding Ati Inc; share changes are against Q2 2026.

Institutions holding ATI in Q3 2026
Institution	Shares	Value	% of portfolio	Change in shares	Action
Schonfeld Strategic Advisors LLC	–	–	–	–	Not filed
State of Wisconsin Investment Board	–	–	–	–	Not filed
Deutsche Bank AG	–	–	–	–	Not filed
California State Teachers Retirement System	–	–	–	–	Not filed
Voleon Capital Management LP	–	–	–	–	Not filed
Tudor Investment Corp Et Al	–	–	–	–	Not filed
First Trust Advisors LP	–	–	–	–	Not filed
Barclays PLC	–	–	–	–	Not filed
HRT Financial LP	–	–	–	–	Not filed
Epoch Investment Partners, Inc.	–	–	–	–	Not filed
Lord, Abbett & Co. LLC	–	–	–	–	Not filed
New York State Teachers Retirement System	–	–	–	–	Not filed
Brevan Howard Capital Management LP	–	–	–	–	Not filed
Sanctuary Advisors, LLC	–	–	–	–	Not filed
Vanguard Asset Management, Ltd	–	–	–	–	Not filed
Bridgewater Associates, LP	–	–	–	–	Not filed
Algert Global LLC	–	–	–	–	Not filed
Advisors Asset Management, Inc.	–	–	–	–	Not filed
Aventail Capital Group, LP	–	–	–	–	Not filed
State Board of Administration of Florida Retirement System	–	–	–	–	Not filed
Stifel Financial Corp	–	–	–	–	Not filed
FACT Capital, LP	–	–	–	–	Not filed
Jump Financial, LLC	–	–	–	–	Not filed
Public Employees Retirement Association of Colorado	–	–	–	–	Not filed
Worldquant Millennium Advisors LLC	–	–	–	–	Not filed
Oribel Capital Management, LP	–	–	–	–	Not filed
SEI Investments Co	–	–	–	–	Not filed
Susquehanna Fundamental Investments, LLC	–	–	–	–	Not filed
Guggenheim Capital LLC	–	–	–	–	Not filed
Natixis Advisors, L.P.	–	–	–	–	Not filed
Toroso Investments, LLC	–	–	–	–	Not filed
Empowered Funds, LLC	–	–	–	–	Not filed
Keystone Investors Pte Ltd	–	–	–	–	Not filed
Tran Capital Management, L.P.	–	–	–	–	Not filed
Royce & Associates LP	–	–	–	–	Not filed
Engineers Gate Manager LP	–	–	–	–	Not filed
TD Asset Management Inc	–	–	–	–	Not filed
Mariner, LLC	–	–	–	–	Not filed
Signature Estate & Investment Advisors LLC	–	–	–	–	Not filed
Credit Agricole S A	–	–	–	–	Not filed
Pinnbrook Capital Management LP	–	–	–	–	Not filed
Wellington Management Group LLP	–	–	–	–	Not filed
Great West Life Assurance Co	–	–	–	–	Not filed
Senator Investment Group LP	–	–	–	–	Not filed
Nearwater Capital Markets, Ltd	–	–	–	–	Not filed
CI Private Wealth, LLC	–	–	–	–	Not filed
Northwestern Mutual Wealth Management Co	–	–	–	–	Not filed
Walleye Capital LLC	–	–	–	–	Not filed
RPg Family Wealth Advisory, LLC	–	–	–	–	Not filed
Soros Fund Management LLCSuperinvestorSoros Fund Management	–	–	–	–	Not filed
ExodusPoint Capital Management, LP	–	–	–	–	Not filed
Premier Fund Managers Ltd	–	–	–	–	Not filed
Tema ETFs LLC	–	–	–	–	Not filed
MetLife Investment Management	–	–	–	–	Not filed
Agf Management Ltd	–	–	–	–	Not filed
Trexquant Investment LP	–	–	–	–	Not filed
Mengis Capital Management, Inc.	–	–	–	–	Not filed
New York State Common Retirement Fund	–	–	–	–	Not filed
Treasurer of the State of North Carolina	–	–	–	–	Not filed
Globeflex Capital L P	–	–	–	–	Not filed
Ieq Capital, LLC	–	–	–	–	Not filed
HSBC Holdings PLC	–	–	–	–	Not filed
Amalgamated Bank	–	–	–	–	Not filed
Manufacturers Life Insurance Company, The	–	–	–	–	Not filed
Police & Firemen's Retirement System of New Jersey	–	–	–	–	Not filed
Russell Investments Group, Ltd.	–	–	–	–	Not filed
Jupiter Topco LLC	–	–	–	–	Not filed
Mountaineer Partners Management, LLC	–	–	–	–	Not filed
Jones Financial Companies LLLP	–	–	–	–	Not filed
Man Group plc	–	–	–	–	Not filed
SG Capital Management LLC	–	–	–	–	Not filed
Zurcher Kantonalbank (Zurich Cantonalbank)	–	–	–	–	Not filed
Channing Capital Management, LLC	–	–	–	–	Not filed
Jacobs Levy Equity Management, Inc	–	–	–	–	Not filed
State of Tennessee, Treasury Department	–	–	–	–	Not filed
Aquatic Capital Management LLC	–	–	–	–	Not filed
Natixis	–	–	–	–	Not filed
Vanguard Global Advisers, LLC	–	–	–	–	Not filed
Nordea Investment Management AB	–	–	–	–	Not filed
Teachers Retirement System of the State of Kentucky	–	–	–	–	Not filed
Hudson Bay Capital Management LP	–	–	–	–	Not filed
Voya Investment Management LLC	–	–	–	–	Not filed
Victory Capital Management Inc	–	–	–	–	Not filed
Cerity Partners LLC	–	–	–	–	Not filed
Mutual of America Capital Management LLC	–	–	–	–	Not filed
Glenmede Trust Co NA	–	–	–	–	Not filed
Quantinno Capital Management LP	–	–	–	–	Not filed
Creative Planning	–	–	–	–	Not filed
Franklin Resources Inc	–	–	–	–	Not filed
Jennison Associates LLC	–	–	–	–	Not filed
Intech Investment Management LLC	–	–	–	–	Not filed
Entropy Technologies, LP	–	–	–	–	Not filed
Cookson Peirce & Co Inc	–	–	–	–	Not filed
Asset Management One Co.,Ltd.	–	–	–	–	Not filed
Warren Averett Asset Management, LLC	–	–	–	–	Not filed
State of New Jersey Common Pension Fund D	–	–	–	–	Not filed
STRS Ohio	–	–	–	–	Not filed
Dymon Asia Capital (Singapore) Pte. Ltd.	–	–	–	–	Not filed
Capital Group Private Client Services, Inc.	–	–	–	–	Not filed
1492 Capital Management LLC	–	–	–	–	Not filed