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
CX Institutional	16	$3.00K	0.00%	00.0%	Unchanged
Planning Strategies Inc.	18	$3.41K	0.00%	00.0%	Unchanged
Michael S. Ryan, Inc.	1,606	$304.2K	0.15%	+118+7.9%	Added
Versant Capital Management, Inc	1,610	$304.9K	0.03%	−56−3.4%	Reduced
BlackRock, Inc.	–	–	–	–	Not filed
Vanguard Portfolio Management LLC	–	–	–	–	Not filed
Vanguard Capital Management LLC	–	–	–	–	Not filed
Capital World Investors	–	–	–	–	Not filed
State Street Corp	–	–	–	–	Not filed
Capital Research Global Investors	–	–	–	–	Not filed
FMR LLC	–	–	–	–	Not filed
Capital International Investors	–	–	–	–	Not filed
Invesco Ltd.	–	–	–	–	Not filed
Geode Capital Management, LLC	–	–	–	–	Not filed
Qube Research & Technologies Ltd	–	–	–	–	Not filed
Morgan Stanley	–	–	–	–	Not filed
Bank of America Corp	–	–	–	–	Not filed
Norges Bank	–	–	–	–	Not filed
Charles Schwab Investment Management Inc	–	–	–	–	Not filed
AQR Capital Management LLC	–	–	–	–	Not filed
Jane Street Group, LLC	–	–	–	–	Not filed
Northern Trust Corp	–	–	–	–	Not filed
Point72 Asset Management, L.P.	–	–	–	–	Not filed
Dimensional Fund Advisors LP	–	–	–	–	Not filed
Viking Global Investors LPSuperinvestorViking Global Investors	–	–	–	–	Not filed
Mirae Asset Global ETFs Holdings Ltd.	–	–	–	–	Not filed
Price T Rowe Associates Inc	–	–	–	–	Not filed
Dendur Capital LP	–	–	–	–	Not filed
Bessemer Group Inc	–	–	–	–	Not filed
BNP Paribas Arbitrage, SA	–	–	–	–	Not filed
Vanguard Fiduciary Trust Co	–	–	–	–	Not filed
Millennium Management LLC	–	–	–	–	Not filed
Fisher Asset Management, LLC	–	–	–	–	Not filed
Ameriprise Financial Inc	–	–	–	–	Not filed
Bank of New York Mellon Corp	–	–	–	–	Not filed
Artemis Investment Management LLP	–	–	–	–	Not filed
Arrowstreet Capital, Limited Partnership	–	–	–	–	Not filed
Polen Capital Management LLC	–	–	–	–	Not filed
D. E. Shaw & Co., Inc.	–	–	–	–	Not filed
Bowen Hanes & Co Inc	–	–	–	–	Not filed
American Century Companies Inc	–	–	–	–	Not filed
Goldman Sachs Group Inc	–	–	–	–	Not filed
Nuveen, LLC	–	–	–	–	Not filed
Marshall Wace, LLP	–	–	–	–	Not filed
Raymond James Financial Inc	–	–	–	–	Not filed
Barrow Hanley Mewhinney & Strauss LLC	–	–	–	–	Not filed
Assenagon Asset Management S.A.	–	–	–	–	Not filed
Two Sigma Investments, LP	–	–	–	–	Not filed
Freestone Grove Partners LP	–	–	–	–	Not filed
Loomis Sayles & Co L P	–	–	–	–	Not filed
Balyasny Asset Management LLC	–	–	–	–	Not filed
Holocene Advisors, LP	–	–	–	–	Not filed
Citadel Advisors LLC	–	–	–	–	Not filed
SG Americas Securities, LLC	–	–	–	–	Not filed
Allspring Global Investments Holdings, LLC	–	–	–	–	Not filed
Wells Fargo & Company	–	–	–	–	Not filed
Federated Hermes, Inc.	–	–	–	–	Not filed
JPMorgan Chase & Co	–	–	–	–	Not filed
UBS Group AG	–	–	–	–	Not filed
1832 Asset Management L.P.	–	–	–	–	Not filed
Neuberger Berman Group LLC	–	–	–	–	Not filed
Square Wave Capital, LLC	–	–	–	–	Not filed
DSM Capital Partners LLC	–	–	–	–	Not filed
UBS Asset Management Americas Inc	–	–	–	–	Not filed
Frontier Capital Management Co LLC	–	–	–	–	Not filed
Bank of Nova Scotia	–	–	–	–	Not filed
Envestnet Asset Management Inc	–	–	–	–	Not filed
Amundi	–	–	–	–	Not filed
Alliancebernstein L.P.	–	–	–	–	Not filed
Rhumbline Advisers	–	–	–	–	Not filed
Gamco Investors, Inc. Et Al	–	–	–	–	Not filed
Thrivent Financial for Lutherans	–	–	–	–	Not filed
ING Groep NV	–	–	–	–	Not filed
Canada Pension Plan Investment Board	–	–	–	–	Not filed
Principal Financial Group Inc	–	–	–	–	Not filed
Retirement Systems of Alabama	–	–	–	–	Not filed
Allianz Asset Management GmbH	–	–	–	–	Not filed
Clearbridge Investments, LLC	–	–	–	–	Not filed
Swiss National Bank	–	–	–	–	Not filed
Gotham Asset Management, LLC	–	–	–	–	Not filed
Vaughan Nelson Investment Management, L.P.	–	–	–	–	Not filed
California Public Employees Retirement System	–	–	–	–	Not filed
Segall Bryant & Hamill, LLC	–	–	–	–	Not filed
Royal Bank of Canada	–	–	–	–	Not filed
Blair William & Co	–	–	–	–	Not filed
Capital International Inc	–	–	–	–	Not filed
Schroder Investment Management Group	–	–	–	–	Not filed
KLCM Advisors, Inc.	–	–	–	–	Not filed
LPL Financial LLC	–	–	–	–	Not filed
Driehaus Capital Management LLC	–	–	–	–	Not filed
Hawk Ridge Capital Management LP	–	–	–	–	Not filed
Jupiter Asset Management Ltd	–	–	–	–	Not filed
Legal & General Group Plc	–	–	–	–	Not filed
Citigroup Inc	–	–	–	–	Not filed
Panagora Asset Management Inc	–	–	–	–	Not filed
Prudential Financial Inc	–	–	–	–	Not filed
Rokos Capital Management LLP	–	–	–	–	Not filed
Yaupon Capital Management LP	–	–	–	–	Not filed
Healthcare of Ontario Pension Plan Trust Fund	–	–	–	–	Not filed
Susquehanna International Group, LLP	–	–	–	–	Not filed