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Disclosery

AMTM AMENTUM HOLDINGS INC

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Stock (common), issuer CIK 2011286

454 managers (462 13F filers) reported a position in AMTM shares at 2025-09-30, 193,426,519 shares in all. 74 filers opened a position and 70 filers sold out during the quarter.

Managers
454
13F filers
462
New
74
Added
104
Reduced
179
Sold out
70
Shares held by filers
193,426,519

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, Q3 2025

Filers in the available 13F reports with a share position at 2025-09-30, 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
AMERICAN SECURITIES LLC45,026,743$1.08B100%013F-HRTimeline
Invesco Ltd.in group Invesco Ltd.22,116,835$530M0.08%+2,539,59413F-HRTimelineGroup
BlackRock, Inc.in group BlackRock, Inc.17,990,449$431M0.01%-1,004,63413F-HRTimelineGroup
VANGUARD GROUP INCgroup of 2 filers holding15,570,443$373M-977,987Timeline
PRIMECAP MANAGEMENT CO/CA/11,918,586$285M0.22%-112,07013F-HRTimeline
STATE STREET CORPin group STATE STREET CORP6,833,376$164M0.01%-244,87313F-HRTimelineGroup
FMR LLCin group FMR LLC6,235,249$149M0.01%+1,661,31913F-HRTimelineGroup
FRONTIER CAPITAL MANAGEMENT CO LLC5,202,680$125M1.12%-258,06313F-HRTimeline
NorthCoast Asset Management LLC3,007,750$72M0.28%+7,08013F-HRTimeline
THOMPSON SIEGEL & WALMSLEY LLC2,730,298$65.4M1.06%-56,61513F-HRTimeline
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC2,654,184$63.6M<0.01%+141,02313F-HRTimelineGroup
Ruane, Cunniff & Goldfarb L.P.2,423,748$58M0.96%-17,99513F-HRTimeline
Mirae Asset Global Investments Co., Ltd.group of 2 filers holding2,081,611$49.9M+701,731Timeline
Freestone Grove Partners LP2,051,859$49.1M0.37%013F-HRTimeline
CHARLES SCHWAB INVESTMENT MANAGEMENT INCin group Charles Schwab Trust Co1,842,171$44.1M0.01%+97,15813F-HRTimelineGroup
MORGAN STANLEYin group MORGAN STANLEY1,806,417$43.3M<0.01%-370,80513F-HR/ATimelineGroup
Thrivent Financial for Lutheransin group Thrivent Financial for Luther…1,805,411$43.2M0.09%+118,30613F-HRTimelineGroup
Arvin Capital Management LP1,636,492$39.2M9.07%-502,94213F-HRTimeline
FIL Ltdin group FIL Ltd1,559,024$37.3M0.03%-508,18113F-HRTimelineGroup
Point72 Asset Management, L.P.in group Point72 Asset Management, L.P.1,380,992$33.1M0.07%+1,030,36413F-HRTimelineGroup
DIMENSIONAL FUND ADVISORS LPin group DIMENSIONAL FUND ADVISORS LP1,306,051$31.3M0.01%-28,70113F-HRTimelineGroup
683 Capital Management, LLCin group 683 Capital Management, LLC1,275,000$30.5M2.77%-355,00013F-HRTimelineGroup
BRIGHTLINE CAPITAL MANAGEMENT, LLC1,200,000$28.7M11.78%+200,00013F-HRTimeline
DISCOVERY CAPITAL MANAGEMENT, LLC / CT1,139,112$27.3M1.5%-1,160,01813F-HRTimeline
Verition Fund Management LLC1,135,626$27.2M0.16%+1,043,14513F-HRTimeline
VOYA INVESTMENT MANAGEMENT LLCin group VOYA INVESTMENT MANAGEMENT LLC1,084,969$26M0.03%+433,39713F-HRTimelineGroup
LOOMIS SAYLES & CO L Pin group LOOMIS SAYLES & CO L P1,064,079$25.5M0.03%+4,87013F-HRTimelineGroup
Penn Capital Management Company, LLC960,607$23.1M1.77%-42,86513F-HRTimeline
NORTHERN TRUST CORPin group NORTHERN TRUST CORP942,945$22.6M<0.01%+1,91213F-HRTimelineGroup
Bank of New York Mellon Corpin group Bank of New York Mellon Corp866,263$20.7M<0.01%-1,94313F-HRTimelineGroup
AVENIR CORP862,453$20.7M2.15%-32,89913F-HRTimeline
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC811,931$19.4M<0.01%+573,68413F-HRTimelineGroup
CACTI ASSET MANAGEMENT LLC857,092$19.3M1.27%+8,14613F-HRTimeline
BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/798,437$19.1M<0.01%-69,82813F-HR/ATimelineGroup
VAN ECK ASSOCIATES CORPin group VAN ECK ASSOCIATES CORP765,677$18.3M0.02%-2,302,48113F-HRTimelineGroup
Nuveen, LLCin group TIAA751,304$18M<0.01%+234,73013F-HRTimelineGroup
PRINCIPAL FINANCIAL GROUP INCgroup of 2 filers holding735,788$17.6M-8,764Timeline
NEW YORK STATE COMMON RETIREMENT FUND659,080$15.8M0.02%-34,69713F-HRTimeline
MILLENNIUM MANAGEMENT LLCin group MILLENNIUM MANAGEMENT LLC640,799$15.3M0.01%-4,025,41613F-HRTimelineGroup
Voss Capital, LP625,000$15M0.86%-775,00013F-HR/ATimeline
Public Sector Pension Investment Board597,976$14.3M0.05%+83,80413F-HRTimeline
TWO SIGMA INVESTMENTS, LPgroup of 2 filers holding558,291$13.4M+544,562Timeline
BW Gestao de Investimentos Ltda.511,477$12.2M0.93%-203,58813F-HRTimeline
UBS Group AGgroup of 2 filers holding509,087$12.2M-687,759Timeline
Vident Advisory, LLCin group Vident Advisory, LLC454,704$10.9M0.11%+22,53913F-HRTimelineGroup
ROYCE & ASSOCIATES LP454,500$10.9M0.11%+119,50013F-HRTimeline
CI INVESTMENTS INC.in group CI INVESTMENTS INC.428,271$10.3M0.04%-26,15113F-HRTimelineGroup
Hyperion Capital Advisors LP420,008$10.1M5.38%+368,52113F-HRTimeline
SEGRA CAPITAL MANAGEMENT, LLC417,025$9.99M11.55%new13F-HRTimeline
Aristotle Capital Boston, LLCin group ARISTOTLE INVESTMENT SERVICES…409,143$9.8M0.51%-13,83313F-HRTimelineGroup
MOORE CAPITAL MANAGEMENT, LP407,417$9.76M0.19%-203,70613F-HRTimeline
Legal & General Group Plcin group Legal & General Group Plc388,289$9.3M<0.01%-16,38413F-HRTimelineGroup
AMERIPRISE FINANCIAL INCin group AMERIPRISE FINANCIAL INC355,946$8.52M<0.01%+13,08413F-HRTimelineGroup
COMERICA BANK312,639$7.49M0.03%-49,22313F-HRTimeline
CenterBook Partners LP308,081$7.38M0.36%+182,74113F-HRTimeline
Swiss National Bank306,491$7.34M<0.01%+4,30013F-HRTimeline
JANE STREET GROUP, LLCin group JANE STREET GROUP, LLC301,261$7.22M0.01%new13F-HRTimelineGroup
RHUMBLINE ADVISERS289,818$6.94M0.01%+2,57113F-HRTimeline
Russell Investments Group, Ltd.in group Russell Investments Group, Lt…289,549$6.93M0.01%-38,63313F-HRTimelineGroup
GRIZZLYROCK CAPITAL, LLC283,113$6.78M5.27%+29,75013F-HRTimeline
HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC268,130$6.42M0.02%new13F-HRTimeline
EXCHANGE TRADED CONCEPTS, LLC267,494$6.41M0.06%+264,16213F-HRTimeline
Trexquant Investment LP255,748$6.13M0.06%new13F-HRTimeline
Gotham Asset Management, LLC244,826$5.86M0.03%new13F-HRTimeline
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA242,056$5.8M<0.01%-201,14413F-HRTimelineGroup
AWH Capital, L.P.235,250$5.63M5.88%+70,00013F-HRTimeline
California Public Employees Retirement …232,009$5.56M<0.01%+3,08813F-HRTimeline
TWINBEECH CAPITAL LP222,707$5.33M0.21%new13F-HRTimeline
ALGERT GLOBAL LLC221,610$5.31M0.09%+197,73013F-HR/ATimeline
CSM Advisors, LLC202,807$4.86M0.14%-430,24113F-HRTimeline
SEI INVESTMENTS COin group SEI INVESTMENTS CO200,523$4.8M0.01%-18,60313F-HRTimelineGroup
Telos Capital Management, Inc.189,859$4.55M0.44%-30,85913F-HRTimeline
HRT FINANCIAL LP186,223$4.46M0.02%new13F-HRTimeline
Hudson Value Partners, LLC185,825$4.45M1.4%+12413F-HRTimeline
ALLIANCEBERNSTEIN L.P.169,726$4.06M<0.01%-178,95813F-HRTimeline
AQR CAPITAL MANAGEMENT LLCin group AQR CAPITAL MANAGEMENT LLC165,205$3.96M<0.01%-184,99813F-HRTimelineGroup
COUNTRY CLUB BANK172,462$3.94M0.23%+14413F-HRTimeline
CALIFORNIA STATE TEACHERS RETIREMENT SY…162,330$3.89M<0.01%+3313F-HRTimeline
WEALTH ENHANCEMENT ADVISORY SERVICES, L…150,345$3.8M0.01%-4,75913F-HRTimeline
Soviero Asset Management, LP155,000$3.71M2.29%+45,00013F-HRTimeline
PRUDENTIAL FINANCIAL INCin group PRUDENTIAL FINANCIAL INC147,198$3.53M<0.01%-2,81013F-HRTimelineGroup
Atom Investors LP144,281$3.46M0.26%new13F-HRTimeline
NEW YORK STATE TEACHERS RETIREMENT SYST…140,918$3.38M0.01%+3,48313F-HRTimeline
RAYMOND JAMES FINANCIAL INCin group RAYMOND JAMES FINANCIAL INC139,403$3.34M<0.01%-50,40713F-HRTimelineGroup
Ancora Advisors LLCin group Ancora Advisors LLC133,874$3.21M0.06%+1,67013F-HRTimelineGroup
Engineers Gate Manager LP125,542$3.01M0.03%new13F-HRTimeline
GAMCO Investors (Gabelli)group of 2 filers holding121,931$2.92M-11,792Timeline
STATE BOARD OF ADMINISTRATION OF FLORID…120,865$2.89M0.01%-1,50113F-HRTimeline
PRICE T ROWE ASSOCIATES INC /MD/118,175$2.83M<0.01%+12,02813F-HRTimeline
CITADEL ADVISORS LLCin group CITADEL ADVISORS LLC117,970$2.83M<0.01%-224,92913F-HRTimelineGroup
ExodusPoint Capital Management, LP106,188$2.54M0.04%+96,38713F-HRTimeline
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO104,771$2.51M<0.01%+13,44913F-HR/ATimelineGroup
North Growth Management Ltd.97,000$2.31M0.4%013F-HRTimeline
DARK FOREST CAPITAL MANAGEMENT LP95,866$2.3M0.09%new13F-HR/ATimeline
STATE OF WISCONSIN INVESTMENT BOARD91,398$2.19M0.01%-45913F-HRTimeline
LPL Financial LLC90,728$2.17M<0.01%-513F-HRTimeline
ENVESTNET ASSET MANAGEMENT INCin group ENVESTNET ASSET MANAGEMENT INC89,590$2.15M<0.01%-7,19513F-HRTimelineGroup
State of New Jersey Common Pension Fund…in group State of New Jersey Common Pe…87,642$2.1M0.01%-12,46213F-HRTimelineGroup
OPPENHEIMER ASSET MANAGEMENT INC.group of 2 filers holding87,599$2.1M+65,653Timeline
Illinois Municipal Retirement Fund82,628$1.98M0.03%+7,17613F-HRTimeline
SUSQUEHANNA INTERNATIONAL GROUP, LLPgroup of 2 filers holding80,804$1.94M+34,097Timeline
Bryn Mawr Trust Advisors, LLC79,643$1.91M0.09%+6,91513F-HRTimeline
Crestwood Advisors Group, LLC77,532$1.86M0.03%-4,24213F-HRTimeline
State of Alaska, Department of Revenue77,136$1.85M0.02%-12,69613F-HRTimeline
CITIGROUP INCin group CITIGROUP INC76,709$1.84M<0.01%-53,15513F-HRTimelineGroup
Alpine Global Management, LLC75,000$1.8M0.37%-5613F-HR/ATimeline
Pine Valley Investments Ltd Liability Co73,697$1.77M0.09%+29,07913F-HRTimeline
Police & Firemen's Retirement System of…71,648$1.72M0.01%+11,25713F-HRTimeline
Treasurer of the State of North Carolina71,581$1.71M0.01%-2,78713F-HRTimeline
Louisiana State Employees Retirement Sy…70,500$1.69M0.03%013F-HRTimeline
JANUS HENDERSON GROUP PLCin group Janus Henderson69,400$1.66M<0.01%013F-HRTimelineGroup
Cubist Systematic Strategies, LLC68,478$1.64M0.02%new13F-HRTimeline
WOLVERINE ASSET MANAGEMENT LLCin group WOLVERINE ASSET MANAGEMENT LLC68,040$1.63M0.02%013F-HRTimelineGroup
Natixis Investment Managersgroup of 2 filers holding67,087$1.61M+10Timeline
HAHN CAPITAL MANAGEMENT LLC65,762$1.57M0.75%-2,98613F-HRTimeline
Quantinno Capital Management LP65,051$1.56M<0.01%+13,50813F-HRTimeline
State of Tennessee, Department of Treas…64,922$1.55M0.01%+2,26813F-HRTimeline
South Dakota Investment Council64,420$1.54M0.03%new13F-HRTimeline
TEACHER RETIREMENT SYSTEM OF TEXAS54,001$1.29M0.01%-10,84413F-HRTimeline
BARCLAYS PLCin group BARCLAYS PLC53,662$1.29M<0.01%+4,42313F-HR/ATimelineGroup
WINTON GROUP Ltdin group WINTON GROUP Ltd53,409$1.28M0.05%-59,01213F-HRTimelineGroup
PUBLIC EMPLOYEES RETIREMENT SYSTEM OF O…51,336$1.23M<0.01%+3213F-HRTimeline
BLAIR WILLIAM & CO/IL50,649$1.21M<0.01%-5,91913F-HRTimeline
XTX Topco Ltdin group XTX Topco Ltd49,265$1.18M0.06%-15,45813F-HRTimelineGroup
TUDOR INVESTMENT CORP ET AL49,133$1.18M0.01%new13F-HR/ATimeline
Blackstone Inc.in group Blackstone Inc.49,106$1.18M0.01%new13F-HRTimelineGroupThe filing omitted confidential holdings, a later amendment may add them.
Paragon Capital Management LLC48,070$1.15M0.56%-64013F-HRTimeline
AMALGAMATED BANK47,561$1.14M0.01%+1,72613F-HRTimeline
ARIZONA STATE RETIREMENT SYSTEM46,801$1.12M0.01%+64813F-HRTimeline
Holocene Advisors, LP45,814$1.1M<0.01%new13F-HRTimeline
Hikari Tsushin, Inc.45,403$1.09M0.07%013F-HRTimeline
YOUSIF CAPITAL MANAGEMENT, LLC43,597$1.04M0.01%-13,36913F-HRTimeline
WELLS FARGO & COMPANY/MNin group WELLS FARGO & COMPANY/MN43,434$1.04M<0.01%+3,22813F-HRTimelineGroup
Versor Investments LP42,911$1.03M0.19%-19,11113F-HRTimeline
TEACHERS RETIREMENT SYSTEM OF THE STATE…42,388$1.01M0.01%-8,94813F-HRTimeline
Caption Management, LLC41,100$984K0.06%new13F-HRTimeline
Mariner, LLCin group Mariner, LLC40,642$973K<0.01%-2,34713F-HRTimelineGroup
Clear Harbor Asset Management, LLC40,003$958K0.07%-5013F-HR/ATimeline
Kerrisdale Advisers, LLC39,520$947K0.49%new13F-HRTimeline
Corient Private Wealth LPin group Corient Private Wealth LP39,051$935K<0.01%-9,33313F-HRTimelineGroup
COMMONWEALTH OF PENNSYLVANIA PUBLIC SCH…39,040$935K<0.01%+30813F-HRTimeline
FIRST TRUST ADVISORS LPin group FIRST TRUST ADVISORS LP38,590$924K<0.01%new13F-HRTimelineGroup
EntryPoint Capital, LLC38,211$915K0.35%+29,10813F-HRTimeline
Universal- Beteiligungs- und Serviceges…in group Universal- Beteiligungs- und …37,796$905K<0.01%-45,97313F-HRTimelineGroup
TOWER BRIDGE ADVISORS37,204$891K0.09%+1,14613F-HRTimeline
Williams Jones Wealth Management, LLC.36,709$879K0.01%-10,95113F-HRTimeline
Creative Planningin group Creative Planning36,113$865K<0.01%+1,81213F-HRTimelineGroup
Balyasny Asset Management L.P.in group Balyasny Asset Management36,010$862K<0.01%new13F-HRTimelineGroup
NISA INVESTMENT ADVISORS, LLC35,855$859K<0.01%+2,22513F-HRTimeline
MANUFACTURERS LIFE INSURANCE COMPANY, T…in group MANUFACTURERS LIFE INSURANCE …35,623$853K<0.01%-74013F-HRTimelineGroup
STIFEL FINANCIAL CORPin group STIFEL FINANCIAL CORP35,458$849K<0.01%+2,45313F-HRTimelineGroup
OREGON PUBLIC EMPLOYEES RETIREMENT FUND34,500$826K0.01%+10013F-HRTimeline
National Philanthropic Trust33,827$810K0.01%013F-HRTimeline
Cerity Partners LLCin group Cerity Partners LLC33,214$795K<0.01%-11,90213F-HRTimelineGroup
Massar Capital Management, LP33,183$795K0.28%new13F-HRTimeline
Focus Partners Wealthin group Focus Partners Wealth32,616$780K<0.01%-4,31813F-HRTimelineGroup
FRANKLIN RESOURCES INCin group Franklin Resources9,035$775K<0.01%new13F-HRTimelineGroup
JONES FINANCIAL COMPANIES LLLPin group JONES FINANCIAL COMPANIES LLLP33,621$766K<0.01%+3,46513F-HRTimelineGroup
Advisors Asset Management, Inc.31,064$744K0.01%-14,11913F-HR/ATimeline
American Trust Investment Advisors, LLC30,483$730K0.38%-2,76913F-HRTimeline
Ensign Peak Advisors, Inc29,986$718K<0.01%-10,60013F-HR/ATimeline
CAPTRUST FINANCIAL ADVISORS29,673$711K<0.01%-1,14213F-HRTimeline
Sciencast Management LP29,673$711K0.13%new13F-HRTimeline
Zurcher Kantonalbank (Zurich Cantonalba…29,538$707K<0.01%+2,70013F-HRTimeline
Maryland State Retirement & Pension Sys…29,451$705K0.01%-22,35513F-HRTimeline
Mraz, Amerine & Associates, Inc.29,195$699K0.11%+20,64513F-HRTimeline
SG Americas Securities, LLC29,064$696K<0.01%+21,18213F-HRTimeline
VICTORY CAPITAL MANAGEMENT INC28,908$692K<0.01%-4,80013F-HRTimeline
CLIFFORD SWAN INVESTMENT COUNSEL LLC28,072$672K0.02%-50413F-HRTimeline
OSAIC HOLDINGS, INC.in group OSAIC HOLDINGS, INC.26,589$645K<0.01%+4,59613F-HRTimelineGroup
SECURITY NATIONAL BANK OF SO DAK26,786$642K0.32%-5413F-HRTimeline
NEVILLE RODIE & SHAW INC26,442$633K0.05%-3,00013F-HRTimeline
SIT INVESTMENT ASSOCIATES INCin group SIT INVESTMENT ASSOCIATES INC26,202$628K0.01%013F-HRTimelineGroup
US BANCORP \DE\in group US BANCORP \DE\26,166$627K<0.01%+4413F-HRTimelineGroup
STEPHENS INC /AR/in group Stephens Investment Managemen…25,956$622K0.01%-1,94413F-HRTimelineGroup
IAT REINSURANCE CO LTD.24,693$591K0.12%013F-HRTimeline
AlphaQuest LLC24,111$577K0.04%new13F-HRTimeline
Carlson Capital, L.P.24,000$575K0.33%new13F-HRTimeline
Peak Asset Management, LLC24,000$575K0.1%013F-HRTimeline
LECAP ASSET MANAGEMENT LTD23,438$561K0.2%new13F-HRTimeline
GSA CAPITAL PARTNERS LLP23,285$558K0.05%new13F-HRTimeline
Cetera Investment Advisers23,209$556K<0.01%+9,03013F-HRTimeline
Pictet Asset Management Holding SAin group Pictet Asset Management Holdi…23,190$555K<0.01%-113F-HRTimelineGroup
LATHROP INVESTMENT MANAGEMENT CO22,817$546K0.1%-4,99413F-HRTimeline
Modera Wealth Management, LLC22,760$545K0.01%-3,46413F-HRTimeline
Qsemble Capital Management, LP21,929$525K0.05%new13F-HRTimeline
Counterpoint Mutual Funds LLC21,913$525K0.04%new13F-HRTimeline
BANK OF MONTREAL /CAN/in group BANK OF MONTREAL /CAN/21,614$518K<0.01%-19,05513F-HRTimelineGroup
GROUP ONE TRADING LLC20,607$494K0.01%-47,30113F-HRTimeline
Wilmington Savings Fund Society, FSB20,578$493K0.01%-27113F-HR/ATimeline
Tidal Investments LLCin group Tidal Investments LLC20,298$486K<0.01%+10,86813F-HRTimelineGroup
DRW Securities, LLC20,061$479K0.02%new13F-HRTimeline
WELLINGTON MANAGEMENT GROUP LLPin group WELLINGTON MANAGEMENT GROUP L…19,688$472K<0.01%-41,09013F-HRTimelineGroup
SECURITY NATIONAL BANK OF SIOUX CITY IO…19,331$463K0.3%+5813F-HRTimeline
TRUIST FINANCIAL CORPin group TRUIST FINANCIAL CORP19,237$461K<0.01%-3,27913F-HRTimelineGroup
IMC-Chicago, LLC19,237$461K0.01%+3,52713F-HRTimeline
DEUTSCHE BANK AG\in group DEUTSCHE BANK AG\18,733$449K<0.01%+1,33413F-HRTimelineGroup
NEUBERGER BERMAN GROUP LLCin group NEUBERGER BERMAN GROUP LLC18,637$446K<0.01%-40,16313F-HRTimelineGroup
Dynamic Technology Lab Private Ltd18,458$442K0.07%new13F-HRTimeline
COMMONWEALTH EQUITY SERVICES, LLC17,771$426K<0.01%-4,36713F-HRTimeline