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
Pathstone Holdings, LLC	–	–	–	–	Not filed
Public Employees Retirement System of Ohio	–	–	–	–	Not filed
S Squared Technology, LLC	–	–	–	–	Not filed
Bank of Montreal	–	–	–	–	Not filed
Louisiana State Employees Retirement System	–	–	–	–	Not filed
Horizon Investments, LLC	–	–	–	–	Not filed
O'Shaughnessy Asset Management, LLC	–	–	–	–	Not filed
Fifth Third Bancorp	–	–	–	–	Not filed
Yousif Capital Management, LLC	–	–	–	–	Not filed
Arizona State Retirement System	–	–	–	–	Not filed
Brinker Capital Investments, LLC	–	–	–	–	Not filed
MML Investors Services, LLC	–	–	–	–	Not filed
Danske Bank A/S	–	–	–	–	Not filed
Hennion & Walsh Asset Management, Inc.	–	–	–	–	Not filed
Janney Montgomery Scott LLC	–	–	–	–	Not filed
The PNC Financial Services Group, Inc.	–	–	–	–	Not filed
Mercer Global Advisors Inc	–	–	–	–	Not filed
Mackenzie Financial Corp	–	–	–	–	Not filed
Vanguard Investments Australia, Ltd.	–	–	–	–	Not filed
Capital International Sarl	–	–	–	–	Not filed
Sequoia Financial Advisors, LLC	–	–	–	–	Not filed
Spire Wealth Management	–	–	–	–	Not filed
Commonwealth of Pennsylvania Public School Empls Retrmt Sys	–	–	–	–	Not filed
New Age Alpha Advisors, LLC	–	–	–	–	Not filed
KR Capital LP	–	–	–	–	Not filed
Concentric Capital Strategies, LP	–	–	–	–	Not filed
State of Michigan Retirement System	–	–	–	–	Not filed
Universal- Beteiligungs- und Servicegesellschaft mbH	–	–	–	–	Not filed
Jain Global LLC	–	–	–	–	Not filed
Wealth Enhancement Advisory Services, LLC	–	–	–	–	Not filed
KLP Kapitalforvaltning AS	–	–	–	–	Not filed
HighTower Advisors, LLC	–	–	–	–	Not filed
H Squared Management LP	–	–	–	–	Not filed
Wiley Bros.-Aintree Capital, LLC	–	–	–	–	Not filed
Farmers & Merchants Investments Inc	–	–	–	–	Not filed
Covea Finance	–	–	–	–	Not filed
Moore Capital Management, LP	–	–	–	–	Not filed
Park Avenue Securities LLC	–	–	–	–	Not filed
Northwestern Mutual Investment Management Company, LLC	–	–	–	–	Not filed
Cetera Investment Advisers	–	–	–	–	Not filed
Xponance, Inc.	–	–	–	–	Not filed
Ameritas Investment Partners, Inc.	–	–	–	–	Not filed
Nisa Investment Advisors, LLC	–	–	–	–	Not filed
Tribune Investment Group LP	–	–	–	–	Not filed
Aware Super Pty Ltd as trustee of Aware Super	–	–	–	–	Not filed
New Mexico Educational Retirement Board	–	–	–	–	Not filed
Pier Capital, LLC	–	–	–	–	Not filed
Oregon Public Employees Retirement Fund	–	–	–	–	Not filed
Pinebridge Investments LLC	–	–	–	–	Not filed
Van Eck Associates Corp	–	–	–	–	Not filed
Candelo Capital Management LP	–	–	–	–	Not filed
Rafferty Asset Management, LLC	–	–	–	–	Not filed
Quantbot Technologies LP	–	–	–	–	Not filed
CIBC Bancorp USA Inc.	–	–	–	–	Not filed
Susquehanna Portfolio Strategies, LLC	–	–	–	–	Not filed
Envestnet Portfolio Solutions, Inc.	–	–	–	–	Not filed
Erste Asset Management GmbH	–	–	–	–	Not filed
Register Financial Advisors LLC	–	–	–	–	Not filed
Nilsine Partners, LLC	–	–	–	–	Not filed
Occudo Quantitative Strategies LP	–	–	–	–	Not filed
Mivtachim The Workers Social Insurance Fund Ltd. (Under Special Management)	–	–	–	–	Not filed
Virginia Retirement Systems Et Al	–	–	–	–	Not filed
Steward Partners Investment Advisory, LLC	–	–	–	–	Not filed
Quadrature Capital Ltd	–	–	–	–	Not filed
Pictet Asset Management Holding SA	–	–	–	–	Not filed
DnB Asset Management AS	–	–	–	–	Not filed
USS Investment Management Ltd	–	–	–	–	Not filed
Huntington National Bank	–	–	–	–	Not filed
Expect Equity LLC	–	–	–	–	Not filed
Taikang Asset Management (Hong Kong) Co Ltd	–	–	–	–	Not filed
Connor, Clark & Lunn Investment Management Ltd.	–	–	–	–	Not filed
Y-Intercept (Hong Kong) Ltd	–	–	–	–	Not filed
Hantz Financial Services, Inc.	–	–	–	–	Not filed
Advisory Services Network, LLC	–	–	–	–	Not filed
Advisor Group Holdings, Inc.	–	–	–	–	Not filed
Pacer Advisors, Inc.	–	–	–	–	Not filed
Legacy Capital Wealth Management, LLC	–	–	–	–	Not filed
Capital Fund Management S.A.	–	–	–	–	Not filed
Lazard Asset Management LLC	–	–	–	–	Not filed
South Dakota Investment Council	–	–	–	–	Not filed
Axq Capital, LP	–	–	–	–	Not filed
Dorsey Wright & Associates	–	–	–	–	Not filed
Campbell & CO Investment Adviser LLC	–	–	–	–	Not filed
Atria Investments LLC	–	–	–	–	Not filed
Paradigm Capital Management Inc	–	–	–	–	Not filed
Pier 88 Investment Partners LLC	–	–	–	–	Not filed
Thoroughbred Financial Services, LLC	–	–	–	–	Not filed
Teacher Retirement System of Texas	–	–	–	–	Not filed
JustInvest LLC	–	–	–	–	Not filed
Bridgeway Capital Management, LLC	–	–	–	–	Not filed
Florida Financial Advisors, LLC	–	–	–	–	Not filed
Knights of Columbus Asset Advisors LLC	–	–	–	–	Not filed
Cambridge Investment Research Advisors, Inc.	–	–	–	–	Not filed
OP Asset Management Ltd	–	–	–	–	Not filed
Graphene Investments SAS	–	–	–	–	Not filed
Quadrant Capital Group LLC	–	–	–	–	Not filed
Gabelli Funds LLC	–	–	–	–	Not filed
RMB Capital Management, LLC	–	–	–	–	Not filed
Raiffeisen Bank International AG	–	–	–	–	Not filed
LMR Partners LLP	–	–	–	–	Not filed