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Disclosery

AMTM AMENTUM HOLDINGS INC

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Stock (common), issuer CIK 2011286

479 managers (483 13F filers) reported a position in AMTM shares at 2025-12-31, 203,822,352 shares in all. 67 filers opened a position and 57 filers sold out during the quarter.

Managers
479
13F filers
483
New
67
Added
132
Reduced
159
Sold out
57
Shares held by filers
203,822,352

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, Q4 2025

Filers in the available 13F reports with a share position at 2025-12-31, 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
AMERICAN SECURITIES LLC45,026,743$1.31B100%013F-HRTimeline
Invesco Ltd.in group Invesco Ltd.21,834,003$633M0.06%-282,83213F-HRTimelineGroup
BlackRock, Inc.in group BlackRock, Inc.17,459,099$506M0.01%-531,35013F-HRTimelineGroup
VANGUARD GROUP INCgroup of 2 filers holding15,429,496$447M-140,947Timeline
PRIMECAP MANAGEMENT CO/CA/12,126,927$352M0.27%+208,34113F-HRTimeline
FMR LLCin group FMR LLC6,707,304$195M0.01%+472,05513F-HRTimelineGroup
FRONTIER CAPITAL MANAGEMENT CO LLC5,772,976$167M1.78%+570,29613F-HRTimeline
STATE STREET CORPin group STATE STREET CORP5,061,620$147M<0.01%-1,771,75613F-HRTimelineGroup
Focus Partners Wealthin group Focus Partners Wealth2,794,417$81M0.09%+2,761,80113F-HRTimelineGroup
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC2,659,364$77.1M<0.01%+5,18013F-HRTimelineGroup
Ruane, Cunniff & Goldfarb L.P.2,394,129$69.4M1.08%-29,61913F-HRTimeline
NORGES BANK2,294,097$66.5M0.01%new13F-HRTimeline
MORGAN STANLEYin group MORGAN STANLEY2,075,352$60.2M<0.01%+268,93513F-HR/ATimelineGroup
Thrivent Financial for Lutheransin group Thrivent Financial for Luther…2,069,104$60M0.11%+263,69313F-HRTimelineGroup
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.in group Mirae Asset Global Investment…1,961,927$56.9M0.09%-119,68413F-HRTimelineGroup
CHARLES SCHWAB INVESTMENT MANAGEMENT INCin group Charles Schwab Trust Co1,952,002$56.6M0.01%+109,83113F-HRTimelineGroup
THOMPSON SIEGEL & WALMSLEY LLC1,921,809$55.7M0.94%-808,48913F-HRTimeline
DIMENSIONAL FUND ADVISORS LPin group DIMENSIONAL FUND ADVISORS LP1,832,926$53.2M0.01%+526,87513F-HRTimelineGroup
Arvin Capital Management LP1,636,492$47.5M10.22%013F-HRTimeline
COOPER CREEK PARTNERS MANAGEMENT LLC1,553,074$45M2.13%new13F-HRTimeline
AQR CAPITAL MANAGEMENT LLCin group AQR CAPITAL MANAGEMENT LLC1,452,049$42.1M0.02%+1,286,84413F-HRTimelineGroup
FIL Ltdin group FIL Ltd1,429,384$41.5M0.03%-129,64013F-HRTimelineGroup
BRIGHTLINE CAPITAL MANAGEMENT, LLC1,392,000$40.4M16.32%+192,00013F-HRTimeline
ExodusPoint Capital Management, LP1,184,186$34.3M0.38%+1,077,99813F-HRTimeline
BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/1,157,427$33.6M<0.01%+358,99013F-HRTimelineGroup
VOYA INVESTMENT MANAGEMENT LLCin group VOYA INVESTMENT MANAGEMENT LLC1,147,477$33.3M0.03%+62,50813F-HRTimelineGroup
LOOMIS SAYLES & CO L Pin group LOOMIS SAYLES & CO L P1,118,930$32.4M0.04%+54,85113F-HRTimelineGroup
NORTHERN TRUST CORPin group NORTHERN TRUST CORP952,977$27.6M<0.01%+10,03213F-HRTimelineGroup
Bank of New York Mellon Corpin group Bank of New York Mellon Corp922,097$26.7M<0.01%+55,83413F-HRTimelineGroup
CACTI ASSET MANAGEMENT LLC881,692$25.7M1.55%+24,60013F-HRTimeline
Verition Fund Management LLC865,172$25.1M0.14%-270,45413F-HRTimeline
AVENIR CORP850,944$24.7M2.68%-11,50913F-HRTimeline
683 Capital Management, LLCin group 683 Capital Management, LLC835,000$24.2M2.01%-440,00013F-HRTimelineGroup
Nuveen, LLCin group TIAA813,774$23.6M0.01%+62,47013F-HRTimelineGroup
TWO SIGMA INVESTMENTS, LPgroup of 2 filers holding795,063$23.1M+236,772Timeline
Penn Capital Management Company, LLC743,937$21.6M1.72%-216,67013F-HRTimeline
PRINCIPAL FINANCIAL GROUP INCgroup of 2 filers holding728,414$21.1M-7,374Timeline
Point72 Asset Management, L.P.in group Point72 Asset Management, L.P.695,287$20.2M0.03%-685,70513F-HRTimelineGroup
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC644,158$18.7M<0.01%-167,77313F-HR/ATimelineGroup
Gotham Asset Management, LLC635,430$18.4M0.07%+390,60413F-HRTimeline
SEGRA CAPITAL MANAGEMENT, LLC604,810$17.5M37.5%+187,78513F-HRTimeline
NEW YORK STATE COMMON RETIREMENT FUND535,218$15.5M0.02%-123,86213F-HRTimeline
VAN ECK ASSOCIATES CORPin group VAN ECK ASSOCIATES CORP531,007$15.4M0.01%-234,67013F-HRTimelineGroup
Public Sector Pension Investment Board530,566$15.4M0.05%-67,41013F-HRTimeline
ROYCE & ASSOCIATES LP495,286$14.4M0.15%+40,78613F-HRTimeline
Hyperion Capital Advisors LP491,872$14.3M6.98%+71,86413F-HRTimeline
MOORE CAPITAL MANAGEMENT, LP475,314$13.8M0.28%+67,89713F-HRTimeline
WELLS FARGO & COMPANY/MNin group WELLS FARGO & COMPANY/MN464,739$13.5M<0.01%+421,30513F-HRTimelineGroup
UBS Group AGgroup of 2 filers holding459,118$13.3M-49,969Timeline
Russell Investments Group, Ltd.in group Russell Investments Group, Lt…437,016$12.7M0.01%+147,46713F-HRTimelineGroup
CI INVESTMENTS INC.in group CI INVESTMENTS INC.425,528$12.3M0.05%-2,74313F-HRTimelineGroup
Ancora Advisors LLCin group Ancora Advisors LLC402,346$11.7M0.24%+268,47213F-HRTimelineGroup
Vident Advisory, LLCin group Vident Advisory, LLC382,540$11.1M0.1%-72,16413F-HRTimelineGroup
FIRST TRUST ADVISORS LPin group FIRST TRUST ADVISORS LP377,828$11M0.01%+339,23813F-HRTimelineGroup
Legal & General Group Plcin group Legal & General Group Plc368,605$10.7M<0.01%-19,68413F-HRTimelineGroup
Aristotle Capital Boston, LLCin group ARISTOTLE INVESTMENT SERVICES…358,867$10.4M0.57%-50,27613F-HRTimelineGroup
SG Americas Securities, LLC345,341$10M0.01%+316,27713F-HRTimeline
AMERIPRISE FINANCIAL INCin group AMERIPRISE FINANCIAL INC338,599$9.82M<0.01%-17,34713F-HRTimelineGroup
Legacy Advisors, LLC9,814,289$9.81M1.05%new13F-HRTimeline
Swiss National Bank311,791$9.04M0.01%+5,30013F-HRTimeline
EXCHANGE TRADED CONCEPTS, LLC310,521$9.01M0.08%+43,02713F-HRTimeline
COMERICA BANK301,564$8.75M0.03%-11,07513F-HRTimeline
RHUMBLINE ADVISERS291,441$8.45M0.01%+1,62313F-HRTimeline
GRIZZLYROCK CAPITAL, LLC285,113$8.27M6.19%+2,00013F-HRTimeline
California Public Employees Retirement …278,644$8.08M<0.01%+46,63513F-HRTimeline
HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC268,375$7.78M0.02%+24513F-HRTimeline
Balyasny Asset Management L.P.in group Balyasny Asset Management267,999$7.77M0.01%+231,98913F-HRTimelineGroup
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA266,543$7.73M<0.01%+24,48713F-HRTimelineGroup
AWH Capital, L.P.235,250$6.82M6.29%013F-HRTimeline
CenterBook Partners LP222,223$6.44M0.31%-85,85813F-HRTimeline
SUSQUEHANNA INTERNATIONAL GROUP, LLPgroup of 2 filers holding219,931$6.38M+139,127Timeline
SEI INVESTMENTS COin group SEI INVESTMENTS CO217,044$6.29M0.01%+16,52113F-HRTimelineGroup
OpenArc Corporate Advisory, LLC200,325$5.81M0.1%13F-HRTimeline
Hudson Value Partners, LLC187,993$5.5M1.64%+2,16813F-HRTimeline
Telos Capital Management, Inc.187,466$5.44M0.51%-2,39313F-HRTimeline
FIRST NATIONAL BANK OF OMAHAin group FIRST NATIONAL BANK OF OMAHA177,700$5.21M0.15%new13F-HRTimelineGroup
Soviero Asset Management, LP178,000$5.16M2.7%+23,00013F-HRTimeline
ALGERT GLOBAL LLC172,533$5M0.08%-49,07713F-HR/ATimeline
WEALTH ENHANCEMENT ADVISORY SERVICES, L…155,779$4.91M0.01%+5,43413F-HRTimeline
RAYMOND JAMES FINANCIAL INCin group RAYMOND JAMES FINANCIAL INC168,045$4.87M<0.01%+28,64213F-HRTimelineGroup
NEW YORK STATE TEACHERS RETIREMENT SYST…166,057$4.82M0.01%+25,13913F-HRTimeline
CALIFORNIA STATE TEACHERS RETIREMENT SY…149,912$4.35M<0.01%-12,41813F-HRTimeline
Qube Research & Technologies Ltd146,182$4.24M0.01%new13F-HRTimeline
PRUDENTIAL FINANCIAL INCin group PRUDENTIAL FINANCIAL INC142,422$4.13M<0.01%-4,77613F-HRTimelineGroup
TWINBEECH CAPITAL LP137,453$3.99M0.28%-85,25413F-HRTimeline
PRICE T ROWE ASSOCIATES INC /MD/129,482$3.76M<0.01%+11,30713F-HRTimeline
South Dakota Investment Council123,037$3.57M0.07%+58,61713F-HRTimeline
STATE BOARD OF ADMINISTRATION OF FLORID…120,865$3.51M0.01%013F-HRTimeline
Caption Management, LLC116,500$3.38M0.15%+75,40013F-HRTimeline
GAMCO Investors (Gabelli)group of 2 filers holding113,249$3.28M-8,682Timeline
SOROS FUND MANAGEMENT LLCin group SOROS FUND MANAGEMENT LLC109,303$3.17M0.04%new13F-HRTimelineGroup
STATE OF WISCONSIN INVESTMENT BOARD103,682$3.01M0.01%+12,28413F-HRTimeline
Bryn Mawr Trust Advisors, LLC101,949$2.96M0.14%+22,30613F-HRTimeline
WINTON GROUP Ltdin group WINTON GROUP Ltd101,449$2.94M0.1%+48,04013F-HRTimelineGroup
Blackstone Inc.in group Blackstone Inc.99,643$2.89M0.01%+50,53713F-HRTimelineGroupThe filing omitted confidential holdings, a later amendment may add them.
State of New Jersey Common Pension Fund…in group State of New Jersey Common Pe…98,984$2.87M0.01%+11,34213F-HRTimelineGroup
North Growth Management Ltd.98,000$2.83M0.44%+1,00013F-HRTimeline
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO89,291$2.59M<0.01%-15,48013F-HRTimelineGroup
LPL Financial LLC86,678$2.51M<0.01%-4,05013F-HRTimeline
CSM Advisors, LLC84,759$2.46M0.07%-118,04813F-HRTimeline
BLAIR WILLIAM & CO/IL79,965$2.32M0.01%+29,31613F-HRTimeline
Holocene Advisors, LP79,321$2.3M<0.01%+33,50713F-HRTimeline
CITIGROUP INCin group CITIGROUP INC79,008$2.29M<0.01%+2,29913F-HRTimelineGroup
State of Alaska, Department of Revenue78,110$2.27M0.02%+97413F-HRTimeline
Quantinno Capital Management LP77,971$2.26M<0.01%+12,92013F-HRTimeline
Pine Valley Investments Ltd Liability Co75,894$2.2M0.11%+2,19713F-HRTimeline
ALLIANCEBERNSTEIN L.P.71,273$2.07M<0.01%-98,45313F-HRTimeline
Ridge Creek Global, Inc70,888$2.06M1.72%13F-HRTimeline
Louisiana State Employees Retirement Sy…70,200$2.04M0.03%-30013F-HRTimeline
Resolute Capital Asset Partners LLC70,000$2.03M0.98%new13F-HRTimeline
JANUS HENDERSON GROUP PLCin group Janus Henderson69,400$2.01M<0.01%013F-HRTimelineGroup
WOLVERINE ASSET MANAGEMENT LLCin group WOLVERINE ASSET MANAGEMENT LLC68,040$1.97M0.03%013F-HRTimelineGroup
ENVESTNET ASSET MANAGEMENT INCin group ENVESTNET ASSET MANAGEMENT INC67,697$1.96M<0.01%-21,89313F-HRTimelineGroup
Treasurer of the State of North Carolina66,707$1.94M0.01%-4,87413F-HRTimeline
Police & Firemen's Retirement System of…66,654$1.93M0.02%-4,99413F-HRTimeline
Mraz, Amerine & Associates, Inc.64,228$1.86M0.28%+35,03313F-HRTimeline
HAHN CAPITAL MANAGEMENT LLC61,962$1.8M0.97%-3,80013F-HRTimeline
MILLENNIUM MANAGEMENT LLCin group MILLENNIUM MANAGEMENT LLC61,187$1.77M<0.01%-579,61213F-HRTimelineGroup
Crestwood Advisors Group, LLC59,939$1.74M0.03%-17,59313F-HRTimeline
Natixis Investment Managersgroup of 2 filers holding57,593$1.67M-9,494Timeline
State of Tennessee, Department of Treas…46,262$1.66M0.01%-18,66013F-HRTimeline
CITADEL ADVISORS LLCin group CITADEL ADVISORS LLC55,585$1.61M<0.01%-62,38513F-HRTimelineGroup
AMALGAMATED BANK54,267$1.57M0.01%+6,70613F-HRTimeline
Cerity Partners LLCin group Cerity Partners LLC51,694$1.5M<0.01%+18,48013F-HRTimelineGroup
Steadtrust LLC50,400$1.46M0.9%new13F-HRTimeline
BARCLAYS PLCin group BARCLAYS PLC50,375$1.46M<0.01%-3,28713F-HRTimelineGroup
PUBLIC EMPLOYEES RETIREMENT SYSTEM OF O…49,232$1.43M<0.01%-2,10413F-HRTimeline
DELPHI MANAGEMENT INC /MA/49,094$1.42M1.39%new13F-HRTimeline
Mariner, LLCin group Mariner, LLC48,837$1.42M<0.01%+8,19513F-HRTimelineGroup
VICTORY CAPITAL MANAGEMENT INC46,996$1.36M<0.01%+18,08813F-HRTimeline
Hikari Tsushin, Inc.45,403$1.32M0.09%013F-HRTimeline
YOUSIF CAPITAL MANAGEMENT, LLC38,091$1.31M0.01%-5,50613F-HRTimeline
Creative Planningin group Creative Planning44,834$1.3M<0.01%+8,72113F-HRTimelineGroup
XTX Topco Ltdin group XTX Topco Ltd44,821$1.3M0.03%-4,44413F-HRTimelineGroup
CWM, LLCin group CWM, LLC44,614$1.29M<0.01%+29,06813F-HRTimelineGroup
ARIZONA STATE RETIREMENT SYSTEM43,860$1.27M0.01%-2,94113F-HRTimeline
Atom Investors LP43,737$1.27M0.1%-100,54413F-HRTimeline
Paragon Capital Management LLC43,730$1.27M0.64%-4,34013F-HRTimeline
Versor Investments LP42,809$1.24M0.19%-10213F-HRTimeline
IEQ CAPITAL, LLC38,025$1.1M<0.01%new13F-HRTimeline
COMMONWEALTH OF PENNSYLVANIA PUBLIC SCH…37,951$1.1M0.01%-1,08913F-HRTimeline
TEACHERS RETIREMENT SYSTEM OF THE STATE…37,772$1.1M0.01%-4,61613F-HRTimeline
Corient Private Wealth LPin group Corient Private Wealth LP36,949$1.07M<0.01%-2,10213F-HR/ATimelineGroup
MANUFACTURERS LIFE INSURANCE COMPANY, T…in group MANUFACTURERS LIFE INSURANCE …36,919$1.07M<0.01%+1,29613F-HRTimelineGroup
CAPITAL FUND MANAGEMENT S.A.36,812$1.07M0.01%new13F-HRTimeline
JONES FINANCIAL COMPANIES LLLPin group JONES FINANCIAL COMPANIES LLLP36,284$1.05M<0.01%+2,66313F-HRTimelineGroup
Clear Harbor Asset Management, LLC36,275$1.05M0.07%-3,72813F-HRTimeline
TEACHER RETIREMENT SYSTEM OF TEXAS35,831$1.04M<0.01%-18,17013F-HRTimeline
NISA INVESTMENT ADVISORS, LLC35,756$1.04M<0.01%-9913F-HRTimeline
Williams Jones Wealth Management, LLC.35,492$1.03M0.01%-1,21713F-HRTimeline
OREGON PUBLIC EMPLOYEES RETIREMENT FUND35,100$1.02M0.01%+60013F-HRTimeline
MARSHALL WACE, LLPin group MARSHALL WACE, LLP35,084$1.02M<0.01%new13F-HRTimelineGroup
Brevan Howard Capital Management LPin group Brevan Howard Capital Managem…35,018$1.02M0.02%new13F-HRTimelineGroup
TOWER BRIDGE ADVISORS34,182$991K0.1%-3,02213F-HRTimeline
Tidal Investments LLCin group Tidal Investments LLC33,961$985K<0.01%+13,66313F-HRTimelineGroup
Zurcher Kantonalbank (Zurich Cantonalba…33,438$970K<0.01%+3,90013F-HRTimeline
Universal- Beteiligungs- und Serviceges…in group Universal- Beteiligungs- und …33,224$963K<0.01%-4,57213F-HRTimelineGroup
CANADA PENSION PLAN INVESTMENT BOARD32,994$957K<0.01%+24,90013F-HRTimeline
LANDSCAPE CAPITAL MANAGEMENT, L.L.C.in group LANDSCAPE CAPITAL MANAGEMENT,…32,981$956K0.06%new13F-HRTimelineGroup
Oak Thistle LLC32,956$956K0.13%new13F-HRTimeline
CAPTRUST FINANCIAL ADVISORS31,935$926K<0.01%+2,26213F-HRTimeline
Pathstone Holdings, LLCin group Pathstone Holdings, LLC31,926$926K<0.01%+17,50113F-HRTimelineGroup
DBA TRADING, LLC31,196$905K0.9%13F-HRTimeline
Dynamic Technology Lab Private Ltd30,863$895K0.2%+12,40513F-HRTimeline
STIFEL FINANCIAL CORPin group STIFEL FINANCIAL CORP30,550$886K<0.01%-4,90813F-HRTimelineGroup
Maryland State Retirement & Pension Sys…29,913$867K0.02%+46213F-HRTimeline
American Trust Investment Advisors, LLC29,175$846K0.45%-1,30813F-HRTimeline
OSAIC HOLDINGS, INC.in group OSAIC HOLDINGS, INC.29,126$845K<0.01%+2,53713F-HRTimelineGroup
GROUP ONE TRADING LLC28,498$826K0.02%+7,89113F-HRTimeline
National Philanthropic Trust27,437$796K0.01%-6,39013F-HRTimeline
Wilmington Savings Fund Society, FSB26,869$779K0.02%+6,29113F-HRTimeline
SECURITY NATIONAL BANK OF SO DAK26,642$773K0.38%-14413F-HRTimeline
SIT INVESTMENT ASSOCIATES INCin group SIT INVESTMENT ASSOCIATES INC26,202$760K0.01%013F-HRTimelineGroup
US BANCORP \DE\in group US BANCORP \DE\25,600$742K<0.01%-56613F-HRTimelineGroup
Pictet Asset Management Holding SAin group Pictet Asset Management Holdi…25,252$732K<0.01%+2,06213F-HRTimelineGroup
Alpine Global Management, LLC25,000$725K0.16%-50,00013F-HR/ATimeline
AlphaQuest LLC24,111$699K0.04%013F-HRTimeline
Peak Asset Management, LLC24,000$696K0.12%013F-HRTimeline
NEVILLE RODIE & SHAW INC23,928$694K0.05%-2,51413F-HRTimeline
STEPHENS INC /AR/in group Stephens Investment Managemen…22,555$654K0.01%-3,40113F-HRTimelineGroup
DOVER ADVISORS, LLC22,219$644K0.25%+4,93413F-HRTimeline
Modera Wealth Management, LLC21,945$636K0.01%-81513F-HRTimeline
Cetera Investment Advisers21,274$617K<0.01%-1,93513F-HRTimeline
DEUTSCHE BANK AG\in group DEUTSCHE BANK AG\21,175$614K<0.01%+2,44213F-HRTimelineGroup
Advisors Asset Management, Inc.21,078$611K0.01%-9,98613F-HR/ATimeline
Magnetar Financial LLCin group Magnetar Financial LLC20,875$605K0.01%new13F-HRTimelineGroup
LATHROP INVESTMENT MANAGEMENT CO20,314$589K0.11%-2,50313F-HRTimeline
Qsemble Capital Management, LP20,136$584K0.05%-1,79313F-HRTimeline
BANK OF MONTREAL /CAN/in group BANK OF MONTREAL /CAN/19,409$563K<0.01%-2,20513F-HRTimelineGroup
Old West Investment Management, LLC19,355$561K0.1%new13F-HRTimeline
CLIFFORD SWAN INVESTMENT COUNSEL LLC19,354$561K0.02%-8,71813F-HRTimeline
SECURITY NATIONAL BANK OF SIOUX CITY IO…19,289$559K0.36%-4213F-HRTimeline
Carlson Capital, L.P.19,000$551K0.27%-5,00013F-HRTimeline
WELLINGTON MANAGEMENT GROUP LLPin group WELLINGTON MANAGEMENT GROUP L…18,948$549K<0.01%-74013F-HRTimelineGroup
Legal Advantage Investments, Inc.18,900$548K0.25%new13F-HRTimeline
CIBC Asset Management Inc18,886$548K<0.01%+4,90613F-HRTimeline
NEUBERGER BERMAN GROUP LLCin group NEUBERGER BERMAN GROUP LLC18,874$547K<0.01%+23713F-HRTimelineGroup
OXFORD ASSET MANAGEMENT LLP18,629$540K0.19%new13F-HRTimelineThe filing omitted confidential holdings, a later amendment may add them.
TRUIST FINANCIAL CORPin group TRUIST FINANCIAL CORP18,521$537K<0.01%-71613F-HRTimelineGroup
Bridgewater Associates, LP18,251$529K<0.01%new13F-HRTimeline