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Disclosery

ATI ATI INC

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Stock (common), issuer CIK 1018963

652 managers (678 13F filers) reported a position in ATI shares at 2026-03-31, 127,383,604 shares in all. 155 filers opened a position and 52 filers sold out during the quarter.

Managers
652
13F filers
678
New
155
Added
246
Reduced
189
Sold out
52
Shares held by filers
127,383,604

Shares held by filers adds up every 13F filer's report, so a share reported by a parent and by its subsidiary counts twice (H9). Managers counts each filer group once.

13D and 13G filers

No 13D or 13G on this security in the data. Structured 13D/G data starts 2024-12-18.

Insider trades

No Form 4 transaction on this security in the data.

13F holders, Q1 2026

Filers in the available 13F reports with a share position at 2026-03-31, filer groups collapsed to one row (method), largest first. Options and principal amounts are left out. A group row states no % of portfolio, since each member reports its own portfolio: the members' percents are listed under it. A value about 1,000 times or 1/1,000 of the price other filers imply is shown as filed but neither ranks the row nor enters a sum.

HolderSharesValue% of portfolioChangeSource
Register Financial Advisors LLC29,853$4.34M1.61%-7,50013F-HRTimeline
WEALTH ENHANCEMENT ADVISORY SERVICES, L…31,790$4.3M0.01%+6,14213F-HRTimeline
COOKSON PEIRCE & CO INC28,949$4.21M0.18%-6,52413F-HRTimeline
NEW MEXICO EDUCATIONAL RETIREMENT BOARD28,800$4.19M0.13%013F-HRTimeline
Pier Capital, LLC28,721$4.18M0.69%-33113F-HRTimeline
HSBC HOLDINGS PLCin group HSBC HOLDINGS PLC28,788$4.16M<0.01%-61,99313F-HRTimelineGroup
PINEBRIDGE INVESTMENTS LLC28,258$4.11M0.03%new13F-HRTimeline
Candelo Capital Management LP28,146$4.09M4.12%-35,25013F-HRTimeline
OREGON PUBLIC EMPLOYEES RETIREMENT FUND27,835$4.05M0.05%+74213F-HRTimeline
Hudson Bay Capital Management LPin group Hudson Bay Capital Management…27,397$3.99M0.02%-64,49913F-HRTimelineGroup
Freemont Management S.A.27,300$3.97M0.74%+7,40013F-HRTimeline
Cetera Investment Advisers26,675$3.88M<0.01%+11,49213F-HRTimeline
Nilsine Partners, LLC25,025$3.84M0.3%+13,09313F-HRTimeline
&PARTNERS25,857$3.8M0.02%+9,75013F-HRTimeline
Expect Equity LLC25,945$3.77M2.94%-2,46513F-HR/ATimeline
CAPITAL FUND MANAGEMENT S.A.25,759$3.75M0.03%-36,91613F-HRTimeline
MML INVESTORS SERVICES, LLC25,348$3.69M0.01%+18,15913F-HRTimeline
CAPSTONE INVESTMENT ADVISORS, LLCin group CAPSTONE INVESTMENT ADVISORS,…25,019$3.64M0.03%+18,61513F-HRTimelineGroup
LAZARD ASSET MANAGEMENT LLCin group LAZARD ASSET MANAGEMENT LLC24,105$3.51M0.01%+17,78513F-HRTimelineGroup
Erste Asset Management GmbHin group Erste Asset Management GmbH25,780$3.49M0.03%013F-HRTimelineGroup
Mivtachim The Workers Social Insurance …in group Mivtachim The Workers Social …24,000$3.49M0.44%new13F-HRTimelineGroup
BANK OF MONTREAL /CAN/in group BANK OF MONTREAL /CAN/23,837$3.47M<0.01%-2,25013F-HRTimelineGroup
Schonfeld Strategic Advisors LLC23,543$3.42M0.03%-83,58813F-HRTimeline
DYMON ASIA CAPITAL (SINGAPORE) PTE. LTD.in group DYMON ASIA CAPITAL (SINGAPORE…23,120$3.36M0.74%-5,28013F-HRTimelineGroup
OP Asset Management Ltd22,985$3.34M0.03%+2,58613F-HR/ATimeline
Squarepoint Ops LLCin group Squarepoint Ops LLC22,841$3.32M0.01%+15,66413F-HRTimelineGroup
HUNTINGTON NATIONAL BANKin group HUNTINGTON NATIONAL BANK22,699$3.3M0.02%-44613F-HRTimelineGroup
Pictet Asset Management Holding SAin group Pictet Asset Management Holdi…22,141$3.22M<0.01%+1,38913F-HRTimelineGroup
Bridgewater Associates, LP21,950$3.19M0.01%new13F-HRTimeline
AXQ CAPITAL, LP21,692$3.16M0.41%new13F-HRTimeline
Pacer Advisors, Inc.21,679$3.15M0.01%+5,53213F-HR/ATimeline
Quantbot Technologies LP21,632$3.15M0.13%-16,04213F-HRTimeline
TEACHER RETIREMENT SYSTEM OF TEXAS21,555$3.14M0.01%+1,34113F-HRTimeline
HANTZ FINANCIAL SERVICES, INC.20,990$3.05M0.05%+94913F-HRTimelineThe filing omitted confidential holdings, a later amendment may add them.
Ensign Peak Advisors, Inc20,815$3.03M0.01%+5,25013F-HR/ATimeline
DNB Asset Management ASin group DNB Asset Management AS20,789$3.02M0.01%+18,82713F-HRTimelineGroup
Federation des caisses Desjardins du Qu…19,929$2.9M0.01%+9,07013F-HRTimeline
Graphene Investments SAS19,900$2.89M1.94%-8,50013F-HRTimeline
Steward Partners Investment Advisory, L…19,841$2.89M0.01%+15,05013F-HRTimeline
LEGACY CAPITAL WEALTH MANAGEMENT, LLC19,271$2.8M1.64%new13F-HRTimeline
PARK AVENUE SECURITIES LLCin group PARK AVENUE SECURITIES LLC19,049$2.77M0.02%new13F-HRTimelineGroup
Entropy Technologies, LP19,026$2.77M0.13%new13F-HRTimeline
PARADIGM CAPITAL MANAGEMENT INC/NY18,000$2.62M0.1%013F-HRTimeline
PIER 88 INVESTMENT PARTNERS LLC18,000$2.62M0.67%-22,91213F-HR/ATimeline
BRIDGEWAY CAPITAL MANAGEMENT, LLC17,900$2.6M0.05%new13F-HRTimeline
TWO SIGMA INVESTMENTS, LPin group TWO SIGMA INVESTMENTS, LP17,775$2.59M<0.01%+15,80813F-HRTimelineGroup
Advisory Services Network, LLC17,698$2.57M0.03%+75713F-HRTimeline
Marathon Partners Equity Management, LLCin group Marathon Partners Equity Mana…17,500$2.55M2.9%-2,50013F-HRTimelineGroup
XPONANCE LLC17,371$2.53M0.02%+3,95113F-HRTimeline
Sciencast Management LP17,329$2.52M0.32%+8,68513F-HRTimeline
Inspire Investing, LLCin group Inspire Investing, LLC17,046$2.48M0.14%+5,48413F-HRTimelineGroup
THOROUGHBRED FINANCIAL SERVICES, LLC16,639$2.42M0.14%+2,68613F-HRTimeline
Knights of Columbus Asset Advisors LLC16,635$2.42M0.14%+1,83913F-HRTimeline
OPPENHEIMER ASSET MANAGEMENT INC.group of 2 filers holding16,591$2.41M+5,667Timeline
Donoghue Forlines LLC16,225$2.36M0.65%new13F-HRTimeline
FRANKLIN RESOURCES INCin group Franklin Resources16,139$2.35M<0.01%+11,11513F-HRTimelineGroup
Curi Capital, LLC16,125$2.35M0.04%+1813F-HRTimeline
QUADRANT CAPITAL GROUP LLC16,122$2.35M0.07%+34913F-HR/ATimeline
Havemeyer Place LP16,058$2.34M0.27%+2,42613F-HRTimeline
VIRGINIA RETIREMENT SYSTEMS ET Al16,028$2.33M0.02%+5,80013F-HRTimeline
Bragg Financial Advisors, Inc15,985$2.33M0.07%013F-HRTimeline
Kestra Advisory Services, LLCgroup of 2 filers holding15,833$2.3M+3,890Timeline
NVWM, LLC15,713$2.29M0.51%-17213F-HRTimeline
Twin Tree Management, LP14,980$2.18M0.46%new13F-HRTimeline
ALLSTATE CORPin group ALLSTATE CORP14,951$2.17M0.02%new13F-HRTimelineGroup
Raiffeisen Bank International AGin group Raiffeisen Bank International…16,000$2.17M0.03%013F-HRTimelineGroup
Catalyst Funds Management Pty Ltd14,732$2.14M0.36%+12,63213F-HRTimeline
COMMONWEALTH EQUITY SERVICES, LLC14,662$2.13M<0.01%+99213F-HRTimeline
Cambridge Investment Research Advisors,…14,635$2.13M0.01%+36013F-HRTimeline
LITTLE HOUSE CAPITAL LLC14,447$2.1M0.54%new13F-HRTimeline
NorthCoast Asset Management LLC14,418$2.1M0.05%-5,53413F-HRTimeline
PVG ASSET MANAGEMENT CORP10,475$2.05M1.22%new13F-HRTimeline
Aigen Investment Management, LP14,063$2.05M0.53%new13F-HRTimeline
Atria Investments, Inc13,943$2.03M0.02%-2,94413F-HRTimeline
State of Alaska, Department of Revenue13,721$2M0.02%+22513F-HRTimeline
LOS ANGELES CAPITAL MANAGEMENT LLC13,574$1.97M0.01%-14,96213F-HRTimeline
FourThought Financial Partners, LLC13,259$1.93M0.17%-56813F-HRTimeline
PUBLIC EMPLOYEES RETIREMENT ASSOCIATION…13,019$1.89M0.01%013F-HRTimeline
Old West Investment Management, LLC12,555$1.83M0.2%013F-HRTimeline
Oak Thistle LLC12,095$1.76M0.17%new13F-HRTimeline
Fruth Investment Management12,050$1.75M0.44%-70013F-HRTimeline
FARMERS & MERCHANTS TRUST Co OF LONG BE…11,831$1.72M0.4%013F-HRTimeline
Jefferies Financial Group Inc.in group Jefferies Financial Group Inc.11,571$1.68M0.02%-11,78213F-HRTimelineGroup
O'SHAUGHNESSY ASSET MANAGEMENT, LLC11,282$1.64M0.01%+2,36113F-HRTimeline
Swiss Life Asset Management Ltdin group Swiss Life Asset Management L…11,207$1.63M0.01%+1,56613F-HRTimelineGroup
Corient Private Wealth LPin group Corient Private Wealth LP11,608$1.55M<0.01%-164,87813F-HRTimelineGroup
OSAIC HOLDINGS, INC.in group OSAIC HOLDINGS, INC.10,590$1.54M<0.01%-10,31713F-HRTimelineGroup
Sigma Planning Corp10,517$1.53M0.04%new13F-HRTimeline
ADAGE CAPITAL PARTNERS GP, L.L.C.in group ADAGE CAPITAL PARTNERS GP, L.…10,468$1.52M<0.01%013F-HRTimelineGroup
Brooklyn Investment Group10,363$1.51M0.05%+3,67613F-HRTimeline
Crossmark Global Holdings, Inc.10,238$1.49M0.02%+43113F-HRTimeline
EVERGREEN CAPITAL MANAGEMENT LLC10,041$1.46M0.03%-2813F-HRTimeline
Orion Porfolio Solutions, LLC10,036$1.46M0.01%+8,07413F-HRTimeline
SECURIAN ASSET MANAGEMENT, INC10,015$1.46M0.06%+11413F-HRTimeline
JONES ROAD CAPITAL MANAGEMENT, L.P.10,000$1.45M2.84%-20,00013F-HRTimeline
Waldron Private Wealth LLC9,903$1.44M0.06%013F-HRTimeline
Dayah Capital LLC9,842$1.43M0.84%-5,15813F-HR/ATimeline
Atom Investors LP9,762$1.42M0.1%new13F-HRTimeline
Merit Financial Group, LLC9,682$1.41M0.01%+3,90013F-HRTimeline
Gallo Partners, LP9,642$1.4M2.68%+6,97113F-HRTimeline
Edgestream Partners, L.P.9,517$1.38M0.05%+1,39913F-HRTimeline
D.A. DAVIDSON & CO.9,355$1.36M0.01%+2,15313F-HRTimeline
Arista Wealth Management, LLC9,221$1.34M0.16%new13F-HRTimeline
PEAK6 LLCin group PEAK6 LLC9,208$1.34M0.04%-6,63513F-HRTimelineGroup
WINTON GROUP Ltdin group WINTON GROUP Ltd8,900$1.29M0.05%-2,20013F-HRTimelineGroup
Weinberger Asset Management, Inc8,800$1.28M0.48%013F-HRTimeline
TRUIST FINANCIAL CORPin group TRUIST FINANCIAL CORP8,781$1.28M<0.01%+1,32613F-HRTimelineGroup
Integrated Quantitative Investments LLC8,735$1.27M0.23%new13F-HRTimeline
Bank Julius Baer & Co. Ltd, Zurich8,769$1.2M<0.01%new13F-HRTimeline
CAPTRUST FINANCIAL ADVISORS8,162$1.19M<0.01%+58613F-HRTimeline
TD Waterhouse Canada Inc.7,642$1.15M<0.01%+7,55113F-HRTimeline
Numerai GP LLC7,841$1.14M0.11%-58513F-HRTimeline
CCG WEALTH MANAGEMENT, LLC7,797$1.13M0.31%+1513F-HRTimeline
Vestmark Advisory Solutions, Inc.7,772$1.13M0.01%+3213F-HRTimeline
FOX RUN MANAGEMENT, L.L.C.8,195$1.11M0.19%+6,24513F-HRTimeline
Vinva Investment Management Ltd5,597$1.11M0.01%+4,13913F-HRTimeline
Illinois Municipal Retirement Fund7,601$1.11M0.01%new13F-HRTimeline
M&T Bank Corpin group M&T Bank Corp7,601$1.11M<0.01%+19413F-HR/ATimelineGroup
BRIGHTON JONES LLC7,566$1.1M0.02%new13F-HR/ATimeline
First Business Financial Services, Inc.7,484$1.09M0.1%013F-HRTimeline
Rockefeller Capital Management L.P.in group Rockefeller Capital Managemen…7,198$1.05M<0.01%+3,97413F-HRTimelineGroup
Utah Retirement Systems7,146$1.04M0.01%013F-HRTimeline
Precision Wealth Strategies, LLC6,939$1.01M0.33%new13F-HRTimeline
Qtron Investments LLC6,927$1.01M0.14%+94813F-HRTimeline
RATIONAL ADVISORS, INC.6,900$1M0.1%-26,50013F-HRTimeline
PINNBROOK CAPITAL MANAGEMENT LP6,900$1M0.82%new13F-HRTimeline
Maryland State Retirement & Pension Sys…6,798$989K0.02%013F-HRTimeline
Friedenthal Financial6,741$981K0.49%new13F-HRTimeline
FIRST CITIZENS BANK & TRUST CO6,630$964K0.02%-9113F-HRTimeline
Fragasso Financial Advisors Inc6,438$953K0.06%-89213F-HRTimeline
Cetera Trust Company, N.A6,473$942K0.53%013F-HRTimeline
UNIVERSITY OF TEXAS/TEXAS AM INVESTMENT…6,437$936K0.14%+1,37413F-HRTimeline
Citizens National Bank Trust Department6,407$932K0.16%013F-HRTimeline
Central Pacific Bank - Trust Division6,308$918K0.12%-19513F-HRTimeline
Mitsubishi UFJ Trust & Banking Corpgroup of 3 filers holding6,272$912K-271,097Timeline
Summit Trail Advisors, LLC6,271$912K0.01%+3,23313F-HRTimeline
Ethic Inc.6,207$903K0.01%+37913F-HRTimeline
Concurrent Investment Advisors, LLCin group Concurrent Investment Advisor…6,203$902K0.01%+69313F-HRTimelineGroup
Fairvoy Private Wealth, LLC6,043$879K0.21%new13F-HRTimeline
KEYBANK NATIONAL ASSOCIATION/OHin group KEYBANK NATIONAL ASSOCIATION/…5,825$847K<0.01%-3,29013F-HRTimelineGroup
Sequoia Financial Advisors, LLC5,728$833K<0.01%-1,24813F-HRTimeline
Crestwood Advisors Group, LLC5,672$825K0.01%-3,94013F-HRTimeline
MARTINGALE ASSET MANAGEMENT L P5,622$818K0.02%-64113F-HRTimeline
Integrated Wealth Concepts LLC5,465$795K0.01%+2,99713F-HRTimeline
ProShare Advisors LLC5,448$792K<0.01%+113F-HRTimeline
Basepoint Wealth LLC5,414$788K0.45%-19913F-HRTimeline
Vestcor Inc5,330$775K0.02%+3,20813F-HRTimeline
South Dakota Investment Council5,300$771K0.01%new13F-HRTimeline
Campbell & CO Investment Adviser LLC5,233$761K0.04%new13F-HRTimeline
Oakmont Investment Advisors, Inc.5,204$757K0.69%new13F-HRTimeline
Lido Advisors, LLCin group Lido Advisors, LLC5,110$743K<0.01%+1,14813F-HRTimelineGroup
Financiere des Professionnels - Fonds d…5,036$733K0.04%013F-HRTimeline
WEST MICHIGAN ADVISORS, LLC5,023$731K0.16%new13F-HRTimeline
JOURNEY STRATEGIC WEALTH LLC4,999$727K0.02%+19813F-HRTimeline
Mayflower Financial Advisors, LLC4,975$724K0.09%013F-HRTimeline
COLDSTREAM CAPITAL MANAGEMENT INC4,903$713K0.01%+1,46913F-HRTimeline
PRAXIS INVESTMENT MANAGEMENT INC4,865$708K0.04%-3,25513F-HRTimeline
Confluence Wealth Services, Inc.4,857$706K0.03%-24513F-HRTimeline
US BANCORP \DE\in group US BANCORP \DE\4,733$688K<0.01%+40413F-HRTimelineGroup
Y.D. More Investments Ltdin group Y.D. More Investments Ltd4,725$687K0.03%new13F-HRTimelineGroup
PFG Advisors4,724$687K0.03%new13F-HRTimeline
Sterling Capital Management LLC4,541$661K0.01%-3,44513F-HRTimeline
Vident Advisory, LLCin group Vident Advisory, LLC4,505$655K0.01%+1,56013F-HRTimelineGroup
SHELTON CAPITAL MANAGEMENT4,484$652K0.01%013F-HRTimeline
TWO SIGMA SECURITIES, LLC4,474$651K0.08%new13F-HRTimeline
Caitong International Asset Management …4,384$638K0.12%new13F-HRTimeline
SHEETS SMITH WEALTH MANAGEMENT4,349$633K0.07%+2813F-HRTimeline
KBC Group NVin group KBC Group NV4,340$631K<0.01%013F-HRTimelineGroup
HARBOUR INVESTMENTS, INC.4,262$620K0.01%+38913F-HRTimeline
CIBC Asset Management Inc4,248$618K<0.01%013F-HRTimeline
Alphadyne Asset Management LP4,176$607K0.08%new13F-HRTimeline
HUNTER ASSOCIATES INVESTMENT MANAGEMENT…4,150$603K0.08%013F-HRTimeline
HB Wealth Management, LLC4,118$599K<0.01%+89613F-HRTimeline
Tower Research Capital LLC (TRC)in group Tower Research Capital LLC (T…4,062$591K0.02%-3,91813F-HRTimelineGroup
ESL Trust Services, LLC4,000$582K0.11%013F-HRTimeline
NewEdge Advisors, LLC3,969$577K<0.01%+3,86913F-HR/ATimeline
Polymer Capital Management (US) LLC3,955$575K0.09%-5,48213F-HRTimeline
Farther Finance Advisors, LLC3,802$575K0.01%+48013F-HRTimeline
North Dakota State Investment Board3,938$573K0.02%-97913F-HRTimeline
CHOREO, LLC3,910$569K0.01%-38613F-HRTimeline
GAMMA Investing LLC3,898$567K0.03%+52113F-HRTimeline
CHESAPEAKE CAPITAL CORP /IL/3,794$552K0.4%013F-HRTimeline
World Investment Advisors3,783$550K0.01%+1,40713F-HRTimeline
Krilogy Financial LLC3,510$547K0.02%+3813F-HRTimeline
EverSource Wealth Advisors, LLCin group EverSource Wealth Advisors, L…3,756$546K0.02%-11113F-HR/ATimelineGroup
Callan Family Office, LLC3,753$546K0.01%-80213F-HRTimeline
Beacon Pointe Advisors, LLC3,652$531K<0.01%new13F-HRTimeline
Apollon Wealth Management, LLCin group Apollon Wealth Management, LLC3,635$529K0.01%+50013F-HRTimelineGroup
Ballentine Partners, LLC3,607$525K0.01%+7413F-HRTimeline
Eurizon Capital SGR S.p.A.3,683$515K<0.01%-1,08413F-HRTimeline
Jump Financial, LLCin group Jump Financial, LLC3,519$512K0.01%-6,58513F-HRTimelineGroup
Sivia Capital Partners, LLC3,517$512K0.1%+1,42613F-HRTimeline
Gateway Wealth Partners, LLC3,439$500K0.02%new13F-HRTimeline
PROFUND ADVISORS LLC3,397$494K0.02%+36513F-HRTimeline
DARK FOREST CAPITAL MANAGEMENT LP3,378$491K0.04%-6,16413F-HRTimeline
Caprock Group, LLC3,352$488K0.01%+22713F-HRTimeline
ARISTEIA CAPITAL, L.L.C.3,292$479K0.01%-3,23713F-HRTimeline
Prospera Financial Services Inc3,288$478K0.01%new13F-HRTimeline
Headlands Technologies LLC3,287$478K0.05%new13F-HRTimeline
GATEWAY INVESTMENT ADVISERS LLC3,278$477K0.01%new13F-HRTimeline