13F

Stock

Amentum Holdings, Inc.

AMTM · held by 482 managers

Reported value

$5.41B

Holders

482

+9 new · −3 exited

Holders’ est. mark

$32.5M

Price effect on 7 books still in the name

Largest holder

$1.31B

AMERICAN SECURITIES LLC

Notable conviction

Share of each notable manager’s 13F book.

Holder count by quarter

Who holds it

Notable only
InvestorSharesValueEst. markChange
AMERICAN SECURITIES LLC45M$1.31B—Held
Invesco Ltd.21.8M$633.2M—Held
BlackRock, Inc.17.5M$506.3M—Held
Vanguard15.4M$446.9M—Held
PRIMECAP MANAGEMENT CO/CA/12.1M$351.7M—Held
Fidelity6.71M$194.5M—Held
FRONTIER CAPITAL MANAGEMENT CO LLC5.77M$167.4M—Held
State Street5.06M$146.8M—Held
Focus Partners Wealth2.79M$81M—Held
GEODE CAPITAL MANAGEMENT, LLC2.66M$77.1M—Held
Ruane, Cunniff & Goldfarb L.P.2.39M$69.4M—Held
NORGES BANK2.29M$66.5M$18.5MAdded$35.3M
MORGAN STANLEY2.08M$60.2M$9.12MAdded$16.9M
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.1.96M$56.9M—Held
CHARLES SCHWAB INVESTMENT MANAGEMENT INC1.95M$56.6M—Held
DIMENSIONAL FUND ADVISORS LP1.83M$53.2M—Held
Arvin Capital Management LP1.64M$47.5M—Held
Icahn Capital1.45M$42.1M—Held
FIL Ltd1.43M$41.5M—Held
BRIGHTLINE CAPITAL MANAGEMENT, LLC1.39M$40.4M—Held
ExodusPoint Capital Management, LP1.18M$34.3M—Held
BANK OF AMERICA CORP /DE/1.16M$33.6M$4.03MAdded$14.4M
VOYA INVESTMENT MANAGEMENT LLC1.15M$33.3M—Held
LOOMIS SAYLES & CO L P1.12M$32.4M—Held
NORTHERN TRUST CORP953K$27.6M—Held
Bank of New York Mellon Corp922.1K$26.7M—Held
CACTI ASSET MANAGEMENT LLC881.7K$25.7M—Held
Verition Fund Management LLC865.2K$25.1M—Held
AVENIR CORP850.9K$24.7M—Held
683 Capital Management, LLC835K$24.2M—Held
Nuveen, LLC813.8K$23.6M—Held
Penn Capital Management Company, LLC743.9K$21.6M—Held
PRINCIPAL FINANCIAL GROUP INC728.4K$21.1M—Held
Point72 Asset Management, L.P.695.3K$20.2M—Held
GOLDMAN SACHS GROUP INC644.2K$18.7M—Held
TWO SIGMA INVESTMENTS, LP638K$18.5M—Held
Gotham Asset Management, LLC635.4K$18.4M—Held
SEGRA CAPITAL MANAGEMENT, LLC604.8K$17.5M—Held
NEW YORK STATE COMMON RETIREMENT FUND535.2K$15.5M—Held
PUBLIC SECTOR PENSION INVESTMENT BOARD530.6K$15.4M—Held
ROYCE & ASSOCIATES LP495.3K$14.4M—Held
Hyperion Capital Advisors LP491.9K$14.3M—Held
MOORE CAPITAL MANAGEMENT, LP475.3K$13.8M—Held
WELLS FARGO & COMPANY/MN464.7K$13.5M—Held
Russell Investments Group, Ltd.437K$12.7M—Held
CI INVESTMENTS INC.425.5K$12.3M—Held
Ancora Advisors LLC402.3K$11.7M—Held
Vident Advisory, LLC382.5K$11.1M—Held
FIRST TRUST ADVISORS LP377.8K$11M—Held
Legal & General Group Plc368.6K$10.7M—Held
Aristotle Capital Boston, LLC358.9K$10.4M—Held
AMERIPRISE FINANCIAL INC338.6K$9.82M—Held
Legacy Advisors, LLC9.81M$9.81M—Held
Swiss National Bank311.8K$9.04M—Held
EXCHANGE TRADED CONCEPTS, LLC310.5K$9.01M—Held
COMERICA BANK301.6K$8.75M—Held
RHUMBLINE ADVISERS291.4K$8.45M—Held
GRIZZLYROCK CAPITAL, LLC285.1K$8.27M—Held
California Public Employees Retirement System278.6K$8.08M—Held
HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC268.4K$7.78M—Held
Balyasny Asset Management L.P.268K$7.77M—Held
ROYAL BANK OF CANADA266.5K$7.73M—Held
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC253K$7.34M—Held
AWH Capital, L.P.235.3K$6.82M—Held
CenterBook Partners LP222.2K$6.44M—Held
SUSQUEHANNA FUNDAMENTAL INVESTMENTS, LLC219.9K$6.38M—Held
SEI INVESTMENTS CO217K$6.29M—Held
UBS Group AG206.1K$5.98M—Held
OpenArc Corporate Advisory, LLC200.3K$5.81M—Held
Hudson Value Partners, LLC188K$5.5M—Held
Telos Capital Management, Inc.187.5K$5.44M—Held
FIRST NATIONAL BANK OF OMAHA177.7K$5.21M—New
Soviero Asset Management, LP178K$5.16M—Held
WEALTH ENHANCEMENT ADVISORY SERVICES, LLC155.8K$4.91M—Held
RAYMOND JAMES FINANCIAL INC168K$4.87M—Held
TWO SIGMA ADVISERS, LP157.1K$4.56M—Held
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM149.9K$4.35M—Held
Qube Research & Technologies Ltd146.2K$4.24M—Held
PRUDENTIAL FINANCIAL INC142.4K$4.13M—Held
TWINBEECH CAPITAL LP137.5K$3.99M—Held
STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM120.9K$3.51M—Held
Caption Management, LLC116.5K$3.38M—Held
Soros Fund Management109.3K$3.17M—Held
STATE OF WISCONSIN INVESTMENT BOARD103.7K$3.01M—Held
Bryn Mawr Trust Advisors, LLC101.9K$2.96M—Held
WINTON GROUP Ltd101.4K$2.94M—Held
Blackstone Inc.99.6K$2.89M—New
State of New Jersey Common Pension Fund D99K$2.87M—Held
GAMCO INVESTORS, INC. ET AL91.9K$2.66M—Held
JPMORGAN CHASE & CO89.3K$2.59M—Held
LPL Financial LLC86.7K$2.51M—Held
BLAIR WILLIAM & CO/IL80K$2.32M—Held
Holocene Advisors, LP79.3K$2.3M—Held
CITIGROUP INC79K$2.29M—Held
Quantinno Capital Management LP78K$2.26M—Held
Pine Valley Investments Ltd Liability Co75.9K$2.2M$372.2KAdded$435.9K
ALLIANCEBERNSTEIN L.P.71.3K$2.07M—Held
Ridge Creek Global, Inc70.9K$2.06M—Held
Louisiana State Employees Retirement System70.2K$2.04M—Held
Resolute Capital Asset Partners LLC70K$2.03M—Held
JANUS HENDERSON GROUP PLC69.4K$2.01M—Held
WOLVERINE ASSET MANAGEMENT LLC68K$1.97M—Held
ENVESTNET ASSET MANAGEMENT INC67.7K$1.96M—Held
Police & Firemen's Retirement System of New Jersey66.7K$1.93M—Held
Mraz, Amerine & Associates, Inc.64.2K$1.86M—Held
HAHN CAPITAL MANAGEMENT LLC62K$1.8M—Held
MILLENNIUM MANAGEMENT LLC61.2K$1.77M—Held
Crestwood Advisors Group, LLC59.9K$1.74M—Held
State of Tennessee, Department of Treasury46.3K$1.66M—Held
Citadel55.6K$1.61M—Held
Cerity Partners LLC51.7K$1.5M—Held
Steadtrust LLC50.4K$1.46M—New
BARCLAYS PLC50.4K$1.46M$254.4KAdded$175.7K
PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO49.2K$1.43M—Held
Mariner, LLC48.8K$1.42M—Held
VICTORY CAPITAL MANAGEMENT INC47K$1.36M—Held
Hikari Tsushin, Inc.45.4K$1.32M—Held
YOUSIF CAPITAL MANAGEMENT, LLC38.1K$1.31M—Held
Creative Planning44.8K$1.3M—Held
XTX Topco Ltd44.8K$1.3M—Held
ARIZONA STATE RETIREMENT SYSTEM43.9K$1.27M—Held
Atom Investors LP43.7K$1.27M—Held
Paragon Capital Management LLC43.7K$1.27M—Held
Versor Investments LP42.8K$1.24M—Held
IEQ CAPITAL, LLC38K$1.1M—Held
COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS38K$1.1M—Held
Corient Private Wealth LLC36.9K$1.07M—Held
MANUFACTURERS LIFE INSURANCE COMPANY, THE36.9K$1.07M—Held
CAPITAL FUND MANAGEMENT S.A.36.8K$1.07M—Held
JONES FINANCIAL COMPANIES LLLP36.3K$1.05M—Held
Clear Harbor Asset Management, LLC36.3K$1.05M—Held
TEACHER RETIREMENT SYSTEM OF TEXAS35.8K$1.04M—Held
NISA INVESTMENT ADVISORS, LLC35.8K$1.04M—Held
Williams Jones Wealth Management, LLC.35.5K$1.03M—Held
OREGON PUBLIC EMPLOYEES RETIREMENT FUND35.1K$1.02M—Held
MARSHALL WACE, LLP35.1K$1.02M—Held
Brevan Howard Capital Management LP35K$1.02M—Held
TOWER BRIDGE ADVISORS34.2K$991.3K—Held
Tidal Investments LLC34K$984.9K—Held
Zurcher Kantonalbank (Zurich Cantonalbank)33.4K$969.7K—Held
Universal- Beteiligungs- und Servicegesellschaft mbH33.2K$963.5K—Held
CANADA PENSION PLAN INVESTMENT BOARD33K$956.8K—Held
LANDSCAPE CAPITAL MANAGEMENT, L.L.C.33K$956.4K—Held
Oak Thistle LLC33K$955.7K—Held
CAPTRUST FINANCIAL ADVISORS31.9K$926.1K—Held
Pathstone Holdings, LLC31.9K$925.9K—Held
DBA TRADING, LLC31.2K$904.7K—Held
Dynamic Technology Lab Private Ltd30.9K$895K—Held
STIFEL FINANCIAL CORP30.6K$886K—Held
Maryland State Retirement & Pension System29.9K$867.5K—Held
American Trust Investment Advisors, LLC29.2K$846.1K—Held
OSAIC HOLDINGS, INC.29.1K$844.7K—Held
GROUP ONE TRADING LLC28.5K$826.4K—Held
National Philanthropic Trust27.4K$795.7K$138.6KCut−$14.5K
Wilmington Savings Fund Society, FSB26.9K$779.2K—Held
SECURITY NATIONAL BANK OF SO DAK26.6K$772.6K—Held
US BANCORP \DE\25.6K$742.4K—Held
Pictet Asset Management Holding SA25.3K$732.3K—Held
Alpine Global Management, LLC25K$725K—Held
AlphaQuest LLC24.1K$699.2K—Held
Peak Asset Management, LLC24K$696K—Held
STEPHENS INC /AR/22.6K$654.1K—Held
DOVER ADVISORS, LLC22.2K$644.4K—Held
Modera Wealth Management, LLC21.9K$636.4K—Held
GABELLI FUNDS LLC21.4K$620.3K—Held
Cetera Investment Advisers21.3K$616.9K—Held
DEUTSCHE BANK AG\21.2K$614.1K—Held
Advisors Asset Management, Inc.21.1K$611.3K—Held
Magnetar Financial LLC20.9K$605.4K—Held
Qsemble Capital Management, LP20.1K$583.9K—Held
BANK OF MONTREAL /CAN/19.4K$562.9K—Held
Old West Investment Management, LLC19.4K$561.3K—Held
CLIFFORD SWAN INVESTMENT COUNSEL LLC19.4K$561.3K—Held
SECURITY NATIONAL BANK OF SIOUX CITY IOWA /IA/19.3K$559.4K—Held
Carlson Capital, L.P.19K$551K—Held
WELLINGTON MANAGEMENT GROUP LLP18.9K$549.5K—Held
Legal Advantage Investments, Inc.18.9K$548.1K—Held
CIBC Asset Management Inc18.9K$547.7K—Held
NEUBERGER BERMAN GROUP LLC18.9K$547.3K—Held
OXFORD ASSET MANAGEMENT LLP18.6K$540.2K—New
TRUIST FINANCIAL CORP18.5K$537.1K—Held
Bridgewater18.3K$529.3K—Held
Vanguard Personalized Indexing Management, LLC17.8K$514.8K—Held
Sterling Capital Management LLC17.6K$509.8K—Held
MUTUAL OF AMERICA CAPITAL MANAGEMENT LLC17.5K$508.1K—Held
Intrinsic Value Partners, LLC16.7K$483.7K—Held
COMMONWEALTH EQUITY SERVICES, LLC16.5K$478.8K—Held
Impact Partnership Wealth, LLC16.3K$473.1K—Held
Gryphon Financial Partners LLC16.3K$472.3K—Held
LEAVELL INVESTMENT MANAGEMENT, INC.16.1K$468K—Held
PROFUND ADVISORS LLC15.8K$457.4K—Held
TOTH FINANCIAL ADVISORY CORP15.7K$455K—Held
MACKENZIE FINANCIAL CORP15.5K$452.6K—Held
MERCER GLOBAL ADVISORS INC /ADV15.5K$452.6K—Held
Summit Financial, LLC15.2K$440.1K—Held
LuminArx Capital Management LP15K$435K—Held
HighTower Advisors, LLC14.6K$424.6K—Held
First Bank & Trust14.2K$410.8K—Held
FIRST MANHATTAN CO. LLC.14.1K$409.4K—Held
Granite Investment Partners, LLC13.2K$384.2K—Held
EVERGREEN CAPITAL MANAGEMENT LLC13.2K$382.7K—Held
QUADRANT CAPITAL GROUP LLC13.1K$378.6K—Held
Marex Group plc13K$377.1K—New
PNC Financial Services Group, Inc.12.6K$366.1K—Held
DAVENPORT & Co LLC12.5K$361.3K—Held
Advyzon Investment Management, LLC12.3K$356K—Held
CAHABA WEALTH MANAGEMENT, INC.12.1K$350.2K—Held
BCS Private Wealth Management, Inc.12K$348K—Held
FRANKLIN RESOURCES INC11.9K$346K—Held
State of Wyoming11.9K$345.6K—Held
Caldwell Investment Management Ltd.11.7K$341.7K—Held
SHUFRO ROSE & CO LLC10.9K$315.2K—Held
JANE STREET GROUP, LLC10.8K$313.5K—Held
Y-Intercept (Hong Kong) Ltd10.5K$304.4K—Held
Grantham, Mayo, Van Otterloo & Co. LLC10.5K$303.3K—Held
M&T Bank Corp10.1K$291.9K—Held
Symmetry Investments LP10K$290K—Held
ARS Investment Partners, LLC10K$290K—Held
BROWN ADVISORY INC9.95K$288.5K—Held
Allworth Financial LP9.85K$285.6K$49.7KAdded$44.8K
SFMG, LLC9.77K$283.4K—Held
VIRGINIA RETIREMENT SYSTEMS ET Al9.6K$278.4K—Held
GUGGENHEIM CAPITAL LLC9.44K$273.7K—Held
PFG Investments, LLC9.42K$273.3K—Held
Ensign Peak Advisors, Inc9.39K$272.2K—Held
Caprock Group, LLC9.31K$270K—Held
Comprehensive Financial Planning, Inc./PA8.83K$256.1K—Held
SYON CAPITAL LLC8.73K$253.1K—Held
Aberdeen Wealth Management LLC8.64K$250.6K—Held
SILVERCREST ASSET MANAGEMENT GROUP LLC8.52K$246.9K—Held
XPONANCE LLC8.44K$244.7K—Held
Concurrent Investment Advisors, LLC8.38K$243.1K—Held
Utah Retirement Systems8.34K$241.8K—Held
WEXFORD CAPITAL LP8.25K$239.3K—Held
Badgley Phelps Wealth Managers, LLC8.15K$236.5K—Held
Lido Advisors, LLC9.85K$236.2K—Held
Washington Trust Advisors, Inc.8.13K$235.8K—Held
FRG Family Wealth Advisors LLC7.86K$228.1K—Held
MIRABELLA FINANCIAL SERVICES LLP7.81K$226.4K—New
KEYBANK NATIONAL ASSOCIATION/OH7.69K$223K—Held
Machina Capital S.A.S.7.48K$217K—Held
Summit Trail Advisors, LLC7.44K$215.9K—Held
SAGE RHINO CAPITAL LLC7.34K$212.7K—Held
FOX RUN MANAGEMENT, L.L.C.7.25K$210.2K—Held
BOOTHBAY FUND MANAGEMENT, LLC7.21K$209.2K—Held
Formidable Asset Management, LLC7.16K$207.7K—Held
Swiss Life Asset Management Ltd7.08K$205.5K—New
UNITED CAPITAL FINANCIAL ADVISORS, LLC6.95K$201.6K—Held
BOK Financial Private Wealth, Inc.6.91K$200.4K—Held
GAMMA Investing LLC5.3K$153.8K—Held

Who left

Positions as of Q4 2025. 13F filings arrive up to 45 days after quarter-end and omit shorts. Values are quarter-end marks, as filed. Estimated mark is the price effect on shares still held — not realized P&L or investment advice.